CN216724563U - Blood sampling pen - Google Patents

Abstract

The utility model relates to a blood sampling pen, comprising: a needle holder adapted to mount a blood collection needle; the needle base is provided with a second needle base elastic arm, and a second needle base elastic arm end surface is formed on the second needle base elastic arm; the core rod is provided with a first core rod surface, and the first core rod surface is an impact surface; the impact surface is suitable for impacting the end surface of the elastic arm of the second needle seat so as to launch the blood taking needle; the second needle seat elastic arm can be switched between a first state and a second state, and in the first state, the impact surface can impact the end surface of the second needle seat elastic arm; in the second state, the impact surface cannot impact the end surface of the second needle seat elastic arm. It is thus clear that in this scheme, the first state can launch the blood taking needle, and the second state can prevent to launch the blood taking needle, switches between these two kinds of states, neither influences the normal use of blood sampling pen, can carry out safety protection again.

Description

Blood sampling pen

Technical Field

The embodiment of the utility model relates to the field of medical instruments, in particular to a blood sampling pen.

Background

A blood collection pen is a widely used medical instrument, and is usually used together with a disposable blood collection needle to collect blood samples of the peripheral of a human body. The process of using the blood sampling pen has certain risk, for example, under some circumstances, the blood sampling needle does not adorn in the needle file, perhaps the blood sampling needle does not drop completely when withdrawing the needle, and under these circumstances, when launching the blood sampling needle again and taking a blood sample and moving, because the blood sampling needle does not fix with the needle file, the blood sampling needle departure can cause the injury to the personnel.

Based on this, it is desirable to provide a lancet such that it can prevent the lancet from being launched in some situations where safety protection is required.

SUMMERY OF THE UTILITY MODEL

To alleviate or solve at least one aspect or at least one point of the above-mentioned problems, the present invention is directed.

In order to achieve the above object, an embodiment of the present invention provides a blood sampling pen, including:

the needle seat is suitable for mounting a blood taking needle and is provided with a second needle seat elastic arm, and a second needle seat elastic arm end face is formed on the second needle seat elastic arm;

the core rod is provided with a first core rod surface, and the first core rod surface is an impact surface;

the striking surface is suitable for striking the end surface of the elastic arm of the second needle seat so as to launch the blood taking needle;

the second needle seat elastic arm can be switched between a first state and a second state, and in the first state, the impact surface can impact the end face of the second needle seat elastic arm; in the second state, the impact surface cannot impact the end surface of the second needle seat elastic arm.

Optionally, in the first state, the second needle base elastic arm deforms towards the direction close to the axis of the blood sampling pen;

in the second state, the second needle seat elastic arm deforms towards the direction of the axis far away from the blood sampling pen.

Optionally, the blood sampling pen further comprises a needle withdrawing rod, and the needle withdrawing rod is suitable for interacting with the second needle seat elastic arm to enable the second needle seat elastic arm to be switched between the first state and the second state.

Optionally, the second needle seat elastic arm is formed with a needle seat sliding groove, the needle withdrawing rod is formed with an extrusion portion, and the extrusion portion is suitable for sliding in the needle seat sliding groove so as to extrude the second needle seat elastic arm to switch between the first state and the second state.

Optionally, the pressing part is adapted to press the second needle seat elastic arm to deform towards the axial direction close to the blood sampling pen when the needle withdrawing rod is located at the needle loading position, so that the impact surface impacts the end face of the second needle seat elastic arm to launch the blood sampling needle; and when the needle withdrawing rod is positioned at the needle withdrawing position, the second needle seat elastic arm is extruded to deform towards the axis direction far away from the blood taking pen, so that the impact surface cannot impact the end surface of the second needle seat elastic arm to prevent the blood taking needle from being launched.

Optionally, the needle seat comprises a second needle seat part, and the second needle seat elastic arm is formed on the second needle seat part; the second needle seat part is also provided with a needle seat hole;

the needle withdrawing rod comprises a needle withdrawing rod head, a needle withdrawing rod middle part and a needle withdrawing rod tail part, the needle withdrawing rod head is suitable for being assembled in the needle seat hole, and the extrusion part is formed at the needle withdrawing rod tail part.

Optionally, the needle hub includes a first needle hub portion formed with a first needle hub housing formed with a needle hub opening adapted for the body of the blood collection needle to pass through.

Optionally, the first needle seat portion is formed with a first needle seat elastic arm for fixing the body of the blood collection needle.

Optionally, the blood sampling pen further comprises a pen cap inner core, and the pen cap inner core is provided with a pen cap inner core elastic arm;

the needle seat is provided with a ninth needle seat surface;

and a part of the needle base is positioned in the pen cap inner core, and the end surface of the elastic arm of the pen cap inner core is matched with the ninth needle seat surface.

Optionally, the blood sampling pen further comprises:

a main body;

a tail cap disposed at a distal end of the body adapted to rotate relative to the body;

the adjusting sleeve is at least partially arranged inside the tail cap;

wherein the rotation of the tail cap is suitable for driving the adjusting sleeve to move axially so as to adjust the puncture force of the blood taking needle.

Optionally, the blood sampling pen further comprises: uide bushing and withdraw of needle bar, wherein:

the guide sleeve comprises a first guide sleeve surface, and a visual window is formed on the first guide sleeve surface;

when the blood taking needle is not loaded, the core bar presents a first visible part through the first guide sleeve surface;

in the loading state of the blood taking needle, the needle withdrawing rod presents a second visible part through the first guide sleeve surface.

Optionally, the core bar can move along the axial direction of the blood sampling pen, when the blood sampling pen is in a non-loading state, the core bar is in a first position, and when the blood sampling pen is in a loading state, the core bar is in a second position;

in the first position, the core bar shields the second visible part of the withdrawing rod;

in the second position, the core bar does not block the second visible part of the withdrawing rod.

Optionally, the core rod comprises an extension formed with a tenth core rod face, and in the first position, the eleventh core rod face shields the second visible portion of the retracting rod.

Alternatively, the core bar is formed with a core bar arm having a locking portion formed thereon, the locking portion being adapted to lock the core bar at the second position, and an extending portion from the locking portion toward a free end of the core bar arm constitutes the extension portion.

Optionally, the blood sampling pen further comprises:

and the emission key can release the locking of the locking part on the position of the core rod by pressing the emission key.

Optionally, the first and second visible portions form different colours and/or indicia.

Optionally, the core bar and the needle withdrawing bar have different colors.

By applying the embodiment of the utility model, the second needle seat elastic arm in the needle seat can be switched between the first state and the second state, and in the first state, the striking surface of the core rod can strike the end surface of the second needle seat elastic arm to launch the blood taking needle; in the second state, the striking surface of the core bar cannot strike the end surface of the elastic arm of the second needle seat, and the blood taking needle cannot be launched. It is thus clear that in this scheme, the first state can launch the blood taking needle, and the second state can prevent to launch the blood taking needle, switches between these two kinds of states, neither influences the normal use of blood sampling pen, can carry out safety protection again.

Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an exploded view of a lancet according to an exemplary embodiment of the present invention.

Fig. 2A is a schematic perspective view of the pen cap in fig. 1.

Fig. 2B is a perspective view of the pen cap in fig. 1 from another angle.

Fig. 3A is a perspective view of the pen cap core in fig. 1.

Fig. 3B is a perspective view of the pen cap core in fig. 1 from another perspective.

Fig. 3C is a perspective view of the pen cap core of fig. 1 from another perspective.

Fig. 3D is a perspective view of the pen cap core in fig. 1 from another perspective.

Fig. 4A is a perspective view of the needle hub of fig. 1.

Fig. 4B is a perspective view of the hub of fig. 1 from another perspective.

Fig. 4C is a partially enlarged view of the hub of fig. 1.

Fig. 4D is a second enlarged view of the needle holder shown in fig. 1.

Fig. 5A is a perspective view of the needle withdrawing rod in fig. 1.

Fig. 5B is a perspective view of the needle withdrawing rod in fig. 1 from another perspective.

Fig. 5C is a partially enlarged view of one of the needle withdrawing shafts of fig. 1.

Fig. 5D is a second enlarged partial schematic view of the needle withdrawing rod in fig. 1.

Fig. 6A is a perspective view of the guide sleeve of fig. 1.

Fig. 6B is a perspective view of the guide sleeve of fig. 1 from another perspective.

Fig. 6C is a perspective view of the guide sleeve of fig. 1 from yet another perspective.

Fig. 7A is a perspective view of the body of fig. 1.

Fig. 7B is a perspective view of the main body of fig. 1 from another perspective.

Fig. 7C is a perspective view of the main body of fig. 1 from yet another perspective.

Fig. 8 is a perspective view of the emissive key of fig. 1.

Fig. 9A is a perspective view of the needle withdrawing key in fig. 1.

Fig. 9B is a perspective view of the needle withdrawing key in fig. 1 from another view angle.

Fig. 10A is a schematic perspective view of the core rod of fig. 1.

Fig. 10B is a perspective view of the core rod of fig. 1 from another perspective.

Fig. 11A is a perspective view of the adjustment sleeve of fig. 1.

Fig. 11B is a perspective view of another perspective view of the adjustment sleeve of fig. 1.

Fig. 11C is a perspective view of the adjustment sleeve of fig. 1 from yet another perspective.

Fig. 12A is a perspective view of the tail cap inner core of fig. 1.

Fig. 12B is a perspective view of the tail cap core of fig. 1 from another perspective.

Fig. 13A is a perspective view of the blocking sheet in fig. 1.

Fig. 13B is a perspective view of the baffle of fig. 1 from another viewing angle.

Fig. 14 is a perspective view of the tail cap of fig. 1.

FIG. 15A is a view showing a state where the lancet is not mounted and is not loaded.

Fig. 15B is a second state of the blood sampling pen without needle and loading.

FIG. 16A is a view showing a state in which a lancet is loaded and a lancet is not loaded.

FIG. 16B is a view of a lancet pen at another angle with a lancet (not shown) loaded but not loaded.

FIG. 17A is a view showing the lancet in a state in which the cap is screwed off and the lancet is loaded.

FIG. 17B is a view showing the lancet in another angle with the cap screwed off and loaded.

Fig. 18 is a schematic view of the lancet mounting needle holder.

FIG. 19 is a schematic view of a needle holder with a core pin contacting and mounting a blood collection needle.

FIG. 20 is a view showing an instant state in which the emission core bar of the lancet contacts the needle holder.

Fig. 21 is a view showing an instant state that the blood collection refill rod hits the needle seat.

FIG. 22 is a view showing a state where the lancet is launched to the forefront.

FIG. 23 is a view showing the recovery of the natural state of the lancet after the lancet firing process is completed.

FIG. 24A is a view showing a state where a lancet tip is inserted into a cap.

FIG. 24B is a view showing a state where the needle withdrawing key is pushed to the needle holder contacting the inner core of the cap.

FIG. 24C is a second state view showing the state that the needle withdrawing key is pushed to the needle base to contact the inner core of the pen cap.

FIG. 25A is a view showing a state where the lancet is completely withdrawn from the hub by pushing the needle withdrawing key.

FIG. 25B is a second view showing a state where the lancet is completely withdrawn from the needle holder by pushing the needle withdrawing key.

FIG. 25C is a third view showing a state where the lancet is completely withdrawn from the needle holder by pushing the needle withdrawing key.

FIG. 25D is a fourth view showing a state where the lancet is completely withdrawn from the needle holder by pushing the needle withdrawing key.

FIG. 26A is a view showing a reset state of the needle withdrawing and retreating key.

FIG. 26B is a second view showing the needle withdrawing and retreating key being in the reset state.

FIG. 27A is a view showing a state in which the lancet-less striking core pin hits the main body instantaneously.

FIG. 27B is a second view showing a state in which the lancet-less striking core pin hits the main body instantaneously.

FIG. 28 is a view showing a state where the lancet is not mounted in position and is fired.

FIG. 29 is a view of the tail cap adjusted to maximize the penetration force.

FIG. 30 is a diagram of the tail cap adjusted to minimize piercing force.

FIG. 31 is a view showing an instant state where the pen cap is adjusted to the longest exposed point.

FIG. 32 is a view showing an instant state where the pen cap is adjusted to the shortest exposed tip.

Fig. 33A is a schematic view of the needle withdrawing rod at the front end of the needle seat.

Fig. 33B is a schematic view of the retraction rod at the front end of the needle holder at another angle.

Fig. 34A is a schematic view of the needle withdrawing rod at the rear end of the needle seat.

Fig. 34B is a schematic view of the retraction rod at an alternate angle at the rearward end of the hub.

Fig. 35 is a schematic view of a hub according to a variant embodiment of the utility model.

FIG. 36 is a schematic view of a needle retraction lever according to a flexible embodiment of the present invention.

Fig. 37 is one of the schematic views of the variation of the needle holder.

Fig. 38 is a second schematic view of a variation of the needle mount.

1-pen cap, 101-first pen cap rib, 102-second pen cap rib, 103-pen cap hole, 104-pen cap end face; 2-a cap inner core, 201-a first cap inner core groove, 202-a first cap inner core rib, 203-a second cap inner core rib, 204-a first cap inner core hole, 205-a first cap inner core surface, 206-a cap inner core sliding surface, 207-a second cap inner core surface, 208-a cap inner core elastic arm, 209-a cap inner core elastic arm end surface;

3-a needle seat, 301-a needle seat opening, 302-a first needle seat elastic arm, 303-a first needle seat surface, 304-a second needle seat surface, 305-a third needle seat surface, 3051-a fourth needle seat surface, 306-a fifth needle seat surface, 307-a second needle seat elastic arm end surface, 308-a sixth needle seat surface, 309-a seventh needle seat surface, 310-an eighth needle seat surface, 311-a needle seat hole, 312-a needle seat sliding groove, 313-a ninth needle seat surface, 314-a second needle seat elastic arm, 3041-a tenth needle seat surface, 3042-a tenth needle seat surface;

4-needle withdrawing rod, 401-fourth needle withdrawing rod face, 402-first needle withdrawing rod face, 404-first clamping surface, 4041-second clamping surface, 4042-third clamping surface, 403-fourth clamping surface, 4031-fifth clamping surface, 4032-sixth clamping surface, 405-third needle withdrawing rod face, 406-second needle withdrawing rod face, 407-fifth needle withdrawing rod face, 408-pushing part, 409-side convex part, 410-needle withdrawing rod end face, 411-extruding part and 412-sixth needle withdrawing rod face;

5-a guide sleeve, 501-a first guide sleeve surface, 502-a first guide sleeve hole, 503-a first guide sleeve positioning groove, 504-a second guide sleeve positioning groove, 505-a third guide sleeve positioning groove, 506-a fourth guide sleeve positioning groove, 507-a guide sleeve hole, 508-a second guide sleeve surface, 509-a guide sleeve positioning hole, 510-a third guide sleeve surface;

6-body, 602-first body hole, 603-second body groove, 604-body positioning groove, 605-body rib, 606-third body hole, 607-first body rib, 608-body positioning surface, 609-second body rib, 610-first body surface, 611-second body surface, 612-fourth body surface, 613-third body surface, 615-second body groove;

7-launch key, 701-launch key projection;

8-withdrawing needle key, 801-first withdrawing needle key surface, 802-withdrawing needle push rod, 803-second withdrawing needle key surface and 804-withdrawing needle key rib;

9-core bar, 901-first core bar face, 902-second core bar resilient arm, 903-second core bar face, 904-fourth core bar rib, 905-fifth core bar face, 906-sixth core bar face, 907-seventh core bar face, 908-bar body structure, 909-eighth core bar face, 910-tenth core bar face, 911-tenth core bar face;

10-adjusting sleeve, 1001-adjusting sleeve guide groove, 1002-adjusting sleeve elastic arm, 1003-adjusting sleeve groove, 1004-adjusting sleeve hole, 1005-adjusting sleeve positioning rib and 1006-first adjusting sleeve surface;

11-tail cap inner core, 1101-tail cap inner core hole, 1102-tail cap inner core groove, 1103-tail cap inner core clamping hook and 1104-tail cap inner core surface;

12-a blocking piece, 1201-a blocking piece hole, 1202-a blocking piece surface and 1203-a blocking piece end surface;

13-tail cap, 1301-tail cap rib, 1302-tail cap end face and 1303-tail cap buckle;

14-a first spring;

15-a second spring;

16-a third spring;

17-blood taking needle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments given herein by one of ordinary skill in the art, are within the scope of the utility model.

In order to achieve the above object, an embodiment of the present invention provides a blood sampling pen, including: aneedle seat 3 and acore rod 9. Fig. 4A to 4D are schematic structural views of aneedle holder 3 according to an exemplary embodiment of the present invention, and fig. 10A to 10B are schematic structural views of acore rod 9 according to an exemplary embodiment of the present invention.

Thehub 3 is adapted to mount thelancet 17, and as shown in fig. 4B, thehub 3 has a second hubelastic arm 314 formed with a second hub elasticarm end surface 307.

As shown in fig. 10A, thecore bar 9 is formed with afirst core face 901, thefirst core face 9 being an impact face; the striking surface is adapted to strike the second hubarm end surface 307 to fire thelancet 17;

thesecond hub arm 314 is switchable between a first state in which the striking surface can strike the second hubarm end surface 307 and a second state; in the second state, the striking surface cannot strike the second hubarm end surface 307.

The number of the second needle holderelastic arms 314 is not limited in the embodiment of the present invention, and is 2 in fig. 4B, and in other embodiments not shown in the present invention, the number of the second needle holderelastic arms 314 may also be 1 or more than 2.

In an exemplary embodiment of the present invention, in the first state, as shown in fig. 38, the second hubelastic arm 314 is deformed toward the direction close to the axis of the lancet, that is, inwardly deformed; in the second state, as shown in fig. 37, the second hubresilient arm 314 is deformed away from the axis of the lancet, i.e., outwardly.

In this embodiment, as shown in fig. 38, in the first state, the second hubelastic arm 314 deforms inward, and the second hub elastic arm end surfaces 307 are gathered together, so that thefirst core surface 901 may hit the gathered second hub elastic arm end surfaces 307, and the blood collection needle may be launched. As shown in fig. 37, in the second state, the second hubelastic arm 314 deforms outward, the second hub elastic arm end surfaces 307 are separated from each other, and a large gap exists between the second hub elastic arm end surfaces 307, so that thefirst mandrel surface 901 moves into the gap between the second hub elastic arm end surfaces 307, and cannot hit the gathered second hub elastic arm end surfaces 307, and the blood collection needle cannot be launched.

Alternatively, in other embodiments not shown in the present invention, the first state and the second state may also be other deformation states of the second needle holderelastic arm 314 as long as thefirst mandrel face 901 can hit the second needle holder elasticarm end face 307 in the first state; in the second state, thefirst core surface 901 may not hit the second hubarm end surface 307. For example, thefirst plunger face 9 may be configured to be an open claw-like structure such that in a first state, the second hubresilient arm 314 is deformed in an axial direction away from the lancet so as to contact the claw-like structure, and in a second state, the second hubresilient arm 314 is deformed in an axial direction closer to the lancet so as to avoid the claw-like structure. The embodiment of the utility model does not limit the specific deformation condition of the second needle seat elastic arm in the first state and the second state.

In an exemplary embodiment of the utility model, the lancet pen further comprises aneedle retracting lever 4, theneedle retracting lever 4 being adapted to interact with the second needlehub spring arm 314 to switch it between the first state and the second state.

Alternatively, in other embodiments of the present invention not shown, other components of the lancet, such as the inner wall surface of the main body, or an inner or outer sleeve, may interact with the secondhub spring arm 314 to switch between the first and second states.

In an exemplary embodiment of the present invention, as shown in fig. 4B and 4C in conjunction with fig. 4B, the second needle holderelastic arm 314 is formed with a needleholder sliding groove 312, and as shown in fig. 5A, theneedle withdrawing rod 4 is formed with apressing portion 411, and thepressing portion 411 is adapted to slide within the needleholder sliding groove 312 to press the second needle holderelastic arm 314 to switch between the first state and the second state.

The engagement of the retractinglever 4 with theneedle holder 3 may be as shown in fig. 33A-B and fig. 34A-B, in which fig. 33A-B show thepressing portion 411 pressing the second needle holderresilient arm 314 in the needleholder slide groove 312 to be in the second state (outwardly deformed), and in fig. 34A-B show thepressing portion 411 pressing the second needle holderresilient arm 314 in the needleholder slide groove 312 to be in the first state (inwardly deformed).

The shape of the needleholder sliding groove 312 shown in fig. 33A-B and 34A-B is exemplary, and the specific shape thereof is not limited in the embodiment of the present invention as long as it is satisfied that thepressing portion 411 slides within the needleholder sliding groove 312 so that the second needle holderresilient arm 314 is switched between the first state and the second state.

In an exemplary embodiment of the present invention, thepressing portion 411 is adapted to press the secondhub spring arm 314 to deform toward the axial direction of the lancet pen when theneedle withdrawing rod 4 is located at the needle mounting position, so that the striking surface strikes the second hub springarm end surface 307 to launch thelancet 17; and when theneedle withdrawing rod 3 is located at the needle withdrawing position, the second needle seatelastic arm 314 is pressed to deform towards the direction away from the axis of the blood taking pen, so that the impact surface cannot impact the second needle seat elasticarm end surface 307 to prevent theblood taking needle 17 from being launched.

In the embodiment, when the needle withdrawing rod is positioned at the needle mounting position, the blood taking needle can be normally launched, and when the needle withdrawing rod is positioned at the needle withdrawing position, the blood taking needle can not be launched for safety protection, so that the safety is improved, and the normal use is not influenced.

In an exemplary embodiment of the present invention, as shown in fig. 4A and 4B, theneedle holder 3 includes a second needle holder portion, which is a portion near the distal end in fig. 4A and 4B. The distal end in the embodiment of the utility model can be understood as a blood sampling distal end, and the proximal end can be understood as a blood sampling proximal end.

As shown in fig. 4B, a second hubelastic arm 314 is formed on the second hub portion; the second hub portion is also formed with ahub hole 311. As shown in fig. 5A, theneedle withdrawing rod 4 includes a needle withdrawing rod head portion adapted to fit in theneedle holder hole 311, a needle withdrawing rod intermediate portion, and a needle withdrawing rod tail portion formed with apressing portion 411.

In an exemplary embodiment of the present invention, as shown in fig. 4A and 4B, theneedle hub 3 includes a first hub portion, which is a portion near the proximal end in fig. 4A and 4B. As shown in fig. 4A, the first hub portion is formed with a first hub housing formed with ahub opening 301, thehub opening 301 adapted for the body of a blood collection needle to pass through.

In an exemplary embodiment of the present invention, as shown in fig. 4B, the first needle holder portion is formed with a first needle holderelastic arm 302, and the first needle holderelastic arm 302 is used for fixing the body of theblood lancet 17.

In an exemplary embodiment of the present invention, the blood collection pen further includes acap core 2, and fig. 3A to 3D are schematic structural views of the cap core in an exemplary embodiment of the present invention. As shown in fig. 3D, thecap core 2 has a capcore spring arm 208.

As shown in fig. 4B, theneedle holder 3 has a ninthneedle seat surface 313;

a portion of theneedle holder 3 is located in thecap plunger 2, and theend surface 209 of theplunger arm 208 mates with the ninthneedle seat surface 313.

In this embodiment, theend surface 209 of the elastic arm of the pen cap inner core and the ninthneedle seat surface 313 interfere with each other in design, and because theelastic arm 208 of the pen cap inner core has elasticity, theend surface 209 of the elastic arm of the pen cap inner core and the ninthneedle seat surface 313 are tightly attached to each other in the forward movement process of theneedle seat 3, so that the shaking and vibration of the needle seat in the movement process can be reduced. The number of the pen cap coreelastic arms 208 is not limited, and may be 1 or more.

In an exemplary embodiment of the present invention, the lancet further comprises:

amain body 6;

atail cap 13, arranged at the distal end of themain body 6, adapted to rotate with respect to themain body 6;

the adjustingsleeve 10 is at least partially arranged inside thetail cap 13;

wherein, the rotation of thetail cap 13 is suitable for driving the adjustingsleeve 10 to axially move so as to adjust the puncture force of theblood taking needle 17.

The blood sampling pen that this embodiment provided possesses puncture dynamics regulatory function, can influence the painful sense of blood sampling pen through puncture power change to can satisfy the blood sampling demand of different thickness skins.

In an exemplary embodiment of the present invention, the lancet further comprises: aguide sleeve 5 and aneedle withdrawing rod 4, wherein fig. 6A to 6C are schematic structural diagrams of theguide sleeve 5 according to an exemplary embodiment of the present invention, and fig. 5A to 5D are schematic structural diagrams of theneedle withdrawing rod 4 according to an exemplary embodiment of the present invention.

As shown in fig. 6A, theguide sleeve 5 includes a firstguide sleeve surface 501, and the firstguide sleeve surface 501 forms a visual window.

In the state that the blood taking needle is not loaded, thecore bar 9 presents a first visible part through the firstguide sleeve surface 501; in the loaded state of the blood taking needle, theneedle withdrawing rod 4 presents a second visible part through the firstguide sleeve surface 501.

Alternatively, in other embodiments of the present invention, in the lancet loading state, thecore bar 9 presents a first visible portion through the firstguide sleeve surface 501; in the uncocked state of the blood collection needle, theneedle withdrawing rod 4 presents a second visible part through the firstguide sleeve surface 501.

For example, theguide sleeve 5 may form a hollow cavity in which theneedle withdrawal rod 4 and thecore rod 9 are at least partially located. The first guidingsleeve surface 501 can be made of transparent material or is formed with a hollow structure to form a visible window, so that theneedle withdrawing rod 4 or thecore rod 9 can be observed through the first guidingsleeve surface 501, and different parts can be observed in different states.

Most of the traditional blood sampling pens adopt a mode of printing mark lines on the surface of a component through ink to display the loading and non-loading states. Printing inks are demanding in terms of production environment and can cause contamination and the inks risk falling off.

In the embodiment of the present invention, the firstguide sleeve surface 501 forms a visual window through which a part of thecore bar 9, i.e., a first visual part, can be observed in the non-loaded state of the lancet, and through which a part of theneedle withdrawing rod 4, i.e., a second visual part, can be observed in the loaded state of the lancet. Thus, the cocked state and the non-cocked state can be distinguished by the situation observed in the visual window. The scheme does not need a mode of printing ink printing marking lines, and solves the technical problem caused by printing ink printing marking lines.

In an exemplary embodiment of the present invention, thecore pin 9 is movable in the axial direction of the lancet, and when the lancet is in the non-loaded state, thecore pin 9 is in the first position, and when the lancet is in the loaded state, thecore pin 9 is in the second position;

in the first position, thecore bar 9 shields the second visible part of theneedle withdrawing rod 4;

in the second position, thecore rod 9 does not obstruct the second visible portion of thewithdrawal rod 4.

In the embodiment, thecore rod 9 is moved to different positions to form different shielding conditions for theneedle withdrawing rod 4, so that different parts can be displayed by the visual window in the loading state and the non-loading state.

Or, in other embodiments of the present invention, the withdrawingrod 4 may be moved to different positions to form different shielding conditions for thecore rod 9, so as to realize that the visual window displays different components in the loading state and the non-loading state. Alternatively, in another embodiment of the present invention, theneedle withdrawing rod 4 is moved to the visible window when the lancet is in the loaded state, and thecore rod 9 is moved to the visible window when the lancet is not in the loaded state.

In an exemplary embodiment of the present invention, as shown in fig. 10A, thecore rod 9 includes an extension portion formed with a tenthcore rod face 911, and in the first position, the tenthcore rod face 911 shields the second visible portion of the retractingrod 4.

As shown in fig. 16A-B, when the lancet is not loaded and the lancet is viewed from the first guidingsleeve surface 501 of the visual window, theneedle withdrawing rod 4 is shielded by the tenthcore rod surface 911, that is, theneedle withdrawing rod 4 cannot be viewed from the visual window, and thecore rod 9 can be viewed.

As shown in fig. 17A-B, when the lancet is in the loaded state, theneedle withdrawing rod 4 is not shielded by thetenth mandrel surface 911 when the lancet is viewed from the firstguide sleeve surface 501 of the visual window, that is, theneedle withdrawing rod 4 can be viewed from the visual window.

In an exemplary embodiment of the utility model, thestem 9 is formed with a stem spring arm (e.g., the portions shown in fig. 10A at 902, 910, 903, and 911), and the stem spring arm is formed with a locking portion (e.g., including the second and tenth core faces 903 and 910 shown in fig. 10A) adapted to lock thestem 9 in the second position, and an extension portion from the locking portion toward a free end of the stem spring arm constitutes an extension.

In an exemplary embodiment of the present invention, the blood drawing pen further includes alaunch key 7, and fig. 8 is a schematic structural diagram of the launch key provided in an exemplary embodiment of the present invention, and the lock of the position of thestem 9 by the lock portion can be released by pressing the launch key. The embodiment of the present invention does not limit the specific structure of the transmission key.

In one exemplary embodiment of the utility model, the first visual portion and the second visual portion form different colors and/or indicia.

In this embodiment, the first and second visible portions form different colors and/or marks because the first and second visible portions belong to different parts, and the different colors and/or marks are caused by the parts themselves, rather than by printing mark lines on the same part surface.

For example, thecore rod 9 and theneedle withdrawal rod 4 have different colors. The color of thecore rod 9 is different from that of theneedle withdrawing rod 4, so that the color of the first visible part is different from that of the second visible part.

According to an exemplary embodiment of the present invention: as shown in fig. 1-38, a lancet comprises: capinner core 2, cap forbrush 1,uide bushing 5 andneedle file 3, wherein: the pen capinner core 2 is matched with theguide sleeve 5 to limit a hollow cavity; thepen cap 1 is suitable for matching with the pen capinner core 2; theneedle holder 3 is adapted to be mounted within the hollow cavity; thelancet 17 includes a needle and a body on which the needle is mounted; the front end of thepen cap 1 is formed with a pen cap opening through which the body of theblood collection needle 17 is adapted to be installed on theneedle holder 3. Optionally, the pen cap opening is apen cap hole 103.

According to an exemplary embodiment of the utility model: as shown in FIG. 1, an exploded view of the lancet of the present invention is shown. As shown in fig. 1, the lancet includes at least one of the following components: the pen cap comprises apen cap 1, a pen capinner core 2, aneedle base 3, aneedle withdrawing rod 4, aguide sleeve 5, amain body 6, a launchingkey 7, aneedle withdrawing key 8, acore rod 9, an adjustingsleeve 10, a tail capinner core 11, a blockingpiece 12, atail cap 13, afirst spring 14, asecond spring 15 and athird spring 16.

According to an exemplary embodiment of the utility model: as shown in fig. 2A and 2B, a specific structure of thepen cap 1 is illustrated. The inner peripheral surface of thepen cap 1 is formed with a firstpen cap rib 101, the outer peripheral surface is formed with a secondpen cap rib 102, thepen cap 1 is provided with a pencap end surface 104, and the pencap end surface 104 is formed with apen cap hole 103.

According to an exemplary embodiment of the utility model: as shown in fig. 3A, 3B, 3C, the structure of thecap core 2 is illustrated. A firstcap core groove 201 is formed on the outer peripheral surface of thepen cap core 2, and the firstcap core groove 201 can be matched with thefirst cap rib 101; a first capinner core rib 202 and a second capinner core rib 203 are further formed on the outer peripheral surface of the pen capinner core 2; thecap core 2 is formed with a firstcap core hole 204. A first capinner core surface 205, a cap innercore sliding surface 206 and a second capinner core surface 207 are formed on the inner circumferential surface of the capinner core 2; one end of the cap core ribelastic arm 208 is formed with a cap core rib elasticarm end surface 209.

According to an exemplary embodiment of the utility model: as shown in fig. 4A, 4B, 4C, 4D, the structure of theneedle holder 3 is illustrated.Hub 3 comprises ahub opening 301, saidhub opening 301 being adapted for the passage of a blood lancet; the first needle seatelastic arm 302, the firstneedle seat surface 303, the secondneedle seat surface 304, the thirdneedle seat surface 305, the fourthneedle seat surface 3051, the fifthneedle seat surface 306, the second needle seat elasticarm end surface 307, the sixthneedle seat surface 308, the seventhneedle seat surface 309, the eighthneedle seat surface 310, theneedle seat hole 311, the needleseat sliding groove 312, the ninthneedle seat surface 313 and the second needle seatelastic arm 314.

According to an exemplary embodiment of the utility model: as shown in fig. 5A, 5B, 5C, and 5D, a specific structure of theneedle withdrawing rod 4 is illustrated. Theneedle withdrawing rod 4 comprises a first needle withdrawingrod face 402, a second needle withdrawingrod face 406, a third needle withdrawingrod face 405, a fourth needle withdrawingrod face 401, a fifth needle withdrawingrod face 407 and a sixth needle withdrawingrod face 412. Theneedle withdrawing rod 4 includes afirst clamping surface 404, asecond clamping surface 4041, athird clamping surface 4042, afourth clamping surface 403, afifth clamping surface 4031, and asixth clamping surface 4032. Theneedle withdrawing rod 4 further comprises a pushingportion 408, aside protrusion 409 and a needle withdrawingrod end surface 410.

According to an exemplary embodiment of the utility model: as shown in fig. 6A, 6B, and 6C, a specific structure of theguide sleeve 5 is illustrated. Theguide sleeve 5 includes: a firstguide sleeve surface 501, a firstguide sleeve hole 502, a first guidesleeve positioning groove 503, a second guidesleeve positioning groove 504, a third guidesleeve positioning groove 505, a fourth guidesleeve positioning groove 506, aguide sleeve hole 507, a first guidesleeve positioning surface 508, and a guidesleeve positioning hole 509.

According to an exemplary embodiment of the utility model: as shown in fig. 7A, 7B, and 7C, the structure of themain body 6 is illustrated. Themain body 6 includes: afirst body hole 602, asecond body groove 603, abody positioning groove 604, abody rib 605, athird body hole 606, afirst body rib 607, abody positioning surface 608, asecond body rib 609, afirst body surface 610, asecond body surface 611, afourth body surface 612, and athird body surface 613.

According to an exemplary embodiment of the present invention: as shown in fig. 8, a specific structure of thetransmission key 7 is illustrated. It includes: the launchkey projection 701.

According to an exemplary embodiment of the utility model: as shown in fig. 9A and 9B, the structure of theneedle withdrawing key 8 is illustrated, and it includes: a first needle withdrawingkey surface 801, a needle withdrawingpush rod 802, a second needle withdrawingkey surface 803 and a needle withdrawingkey rib 804.

According to an exemplary embodiment of the utility model: as shown in fig. 10A and 10B, thecore bar 9 is schematically constituted by: a firstcore rod face 901, a second core rodelastic arm 902, a thirdcore rod face 903, a fourthcore rod rib 904, a fifthcore rod face 905, a sixthcore rod face 906, a seventhcore rod face 907, arod body structure 908, an eighthcore rod face 909, a tenthcore rod face 910 and an eleventhcore rod face 911.

According to an exemplary embodiment of the utility model: as shown in fig. 11A, 11B, and 11C, a specific structure of the adjustingsleeve 10 is illustrated, which includes: the adjustable sleeve comprises an adjustablesleeve guide groove 1001, an adjustable sleeveelastic arm 1002, anadjustable sleeve groove 1003, anadjustable sleeve hole 1004, an adjustablesleeve positioning rib 1005 and a firstadjustable sleeve surface 1006.

According to an exemplary embodiment of the utility model: as shown in fig. 12A and 12B, a specific structure of the tail capinner core 11 is illustrated, which includes: the tail capinner core hole 1101, the tail capinner core groove 1102, the tail capinner core trip 1103 and the tail capinner core surface 1104.

According to an exemplary embodiment of the utility model: as shown in fig. 13A and 13B, a specific structure of thebaffle 12 is illustrated, and includes:flap hole 1201,flap face 1202,flap end face 1203.

According to an exemplary embodiment of the utility model: as shown in fig. 14, a specific structure of thetail cap 13 is illustrated, which includes:tail cap rib 1301, tailcap end surface 1302 andtail cap buckle 1303.

The cooperation of the various components is described below in conjunction with figures 1-38:

according to an exemplary embodiment of the utility model: theguide sleeve 5 and themain body 6 are both of a cylindrical structure, theguide sleeve 5 can be assembled in the cavity of themain body 6, and the guidesleeve positioning groove 506 is matched with the mainbody positioning rib 607, so that the guide sleeve and the main body cannot rotate relatively. The guidesleeve locating surface 508 cooperates with thebody locating surface 608, and the guidesleeve locating hole 509 cooperates with thebody locating rib 609 so that the guide sleeve cannot move axially relative to the body.

Theguide sleeve 5 is fixed with the pen capinner core 2, and the first guidesleeve positioning groove 503 is matched with the first pen capinner core rib 202, so that the pen capinner core 2 cannot move axially. The second guidingsleeve positioning groove 504 is matched with the second pen capinner core rib 203, so that the pen capinner core 2 cannot rotate axially.

After the pen capinner core 2 and theguide sleeve 5 are assembled, a hollow cavity is formed, and theneedle base 3 is positioned in the hollow cavity.

The tail end of theneedle base 3 passes through theguide sleeve hole 507, the front end of theneedle base 3 passes through the pen cap inner core throughhole 204, the front end of theneedle base 3 refers to one end for containing a blood taking needle, and the rear end of theneedle base 3 refers to the other end.

Theeighth seating surface 310 is a seating surface for seating thecap plunger 206, and theninth seating surface 313 is a seating surface for seating thecap plunger arm 209, so that theseating 3 can move axially. Theend surface 209 of the elastic arm of the pen cap inner core is interfered with the ninthneedle seat surface 313 in design, but because theelastic arm 208 of the pen cap inner core has elasticity, theend surface 209 of the elastic arm of the pen cap inner core is tightly attached to the ninthneedle seat surface 313 in the forward movement process of theneedle seat 3, and the shaking and the vibration of theneedle seat 3 in the movement process can be reduced. Optionally, the number of the pen cap coreelastic arms 208 can be 1 or more.

Hub 3 may be moved forward untilsixth hub surface 308 contacts firstcap core surface 205 andhub 3 may be moved rearward untilseventh hub surface 309 contacts thirdguide sleeve surface 510.

Afirst spring 14 is arranged between the second pen capinner core surface 207 and the sixthneedle seat surface 308, and the sixthneedle seat surface 308 is a needle seat end surface; one end of thefirst spring 14 is in contact with the second capinner core surface 207, and the other end is in contact with the sixthneedle seat surface 308, and theneedle seat 3 makes the seventhneedle seat surface 309 contact with the thirdguide sleeve surface 510 under the action of the first spring 14 (as shown in fig. 15B).

On capinner core 2, be equipped withcap 1, thefirst cap muscle 101 ofcap 1, optionally,first cap muscle 101 can be cylindrical or square, and quantity can be 1 or a plurality of, cooperates with first capinner core groove 201, whenrotatory cap 1, can makecap 1 and capinner core 2 produce axial relative displacement.

Thesecond cap rib 102 cooperates with thethird guiding groove 505 to fix thecap 1 at a relative position. The scale feel is felt with a slight click when thecap 1 is switched over. Third uide bushingconstant head tank 505 circumference distributes on 5 anterior medial surfaces of uide bushing, and third uide bushingconstant head tank 505 quantity can be more than 2.

Theneedle withdrawing rod 4 is assembled at the rear of theneedle seat 3, the needle withdrawing rod head (for example, including the fourth needle withdrawingrod surface 401 and the third needle withdrawing rod surface 405) is assembled in theneedle seat hole 311, theneedle withdrawing rod 4 can move forward until the second needle withdrawingrod surface 406 contacts with the fifthneedle seat surface 306, and can move backward until the first needle withdrawingrod surface 402 contacts with the firstneedle seat surface 303.

Theneedle withdrawing key 8 is assembled on themain body 6, the second needle withdrawingkey surface 803 is attached to the thirdmain body surface 613, the first needle withdrawingkey surface 801 is in contact with or not in contact with the fourthmain body surface 612, and the needle withdrawing key 8 can axially move relative to themain body 6. The pin withdrawingkey rib 804 is matched with the secondmain body groove 603, so that the shaking of the pin withdrawing key 8 relative to themain body 6 can be reduced. Optionally, the number of theneedle withdrawing ribs 804 and thesecond body grooves 603 is 1 or more.

Theguide sleeve 5 is provided with alaunch key 7 for releasing the cocking state of thecore rod 9.

In the rear cavity of themain body 6, an adjustingsleeve 10 is arranged, and an adjustingsleeve guide groove 1001 is matched with amain body rib 605, so that the adjustingsleeve 10 and themain body 6 can rotate relatively and simultaneously realize axial relative movement.

The adjustmentsleeve springing arm 1002 cooperates with the second body groove 615 to fix the relative position of theadjustment sleeve 10 and thebody 6, and a graduated feel is felt with a slight click when switching positions. Alternatively, the number of theadjustment collet arms 1002 may be 1 or more, and the number of the second body grooves 615 may be 2 or more. Optionally, theadjustment collet arm 1002 and the second body groove 615 may not be present.

In the cavity formed after themain body 6 and the adjustingsleeve 10 are assembled, thecore rod 9 is assembled, and thecore rod 9 can move axially in the cavity and is limited by the eighthcore rod face 909 and the mainbody positioning groove 604 in the circumferential direction. Thestem 9 may be moved rearward until thesixth club face 906 contacts the firstadjustment sleeve face 1006 and forward until theseventh club face 907 contacts thefirst body face 610.

Therod structure 908 of thecore rod 9 passes through the adjustingsleeve hole 1004, thesecond spring 15 is assembled on thecore rod 9, thesecond spring 15 is sleeved on thecore rod 9, and after the blood sampling pen is assembled, one end of thesecond spring 15 is contacted with the firstmain body surface 610, and the other end is contacted with the first adjustingsleeve surface 1006. Wherein thesecond spring 15 is a firing spring.

In the rear cavity of the adjustingsleeve 10, a tail capinner core 11 is arranged, and therod body structure 908 penetrates through a tail capinner core hole 1101. Thegroove 1102 of the tail cap inner core is matched and oriented with the adjustingsleeve positioning rib 1005, so that the adjustingsleeve 10 and the tail capinner core 11 can synchronously rotate in the circumferential direction.

The outer side of the adjustingsleeve 10 is provided with atail cap 13, and atail cap buckle 1303 is matched with a tail cap innercore clamping hook 1103, so that thetail cap 13 and the adjustingsleeve 10 are relatively fixed in axial position. Thetail cap rib 1301 of thetail cap 13 is matched with the adjustingsleeve groove 1003, so that thetail cap 13 and the adjustingsleeve 10 can synchronously rotate in the circumferential direction. After the lancet is assembled, the tailcap end surface 1302 contacts thesecond body surface 611.

Abaffle plate 12 is arranged at the tail part of thecore rod 9, the axial positions of thebaffle plate 12 and thecore rod 9 are relatively fixed, athird spring 16 is arranged between thebaffle plate 12 and the tail capinner core 11, one end of thethird spring 16 is contacted with the tail capinner core surface 1104, and the other end is contacted with thebaffle plate surface 1202.

According to an exemplary embodiment of the present invention, as shown in fig. 1 to 38, there is provided a lancet protection mechanism including: aneedle seat 3 adapted to mount ablood collection needle 17; theneedle holder 3 has a second needle holderresilient arm 314 formed with a second needle holder resilientarm end surface 307; acore bar 9, thecore bar 9 being formed with a firstcore bar face 901, the firstcore bar face 9 being an impact face; the striking face adapted to strike the second hubarm end face 307 to fire the lancet; the secondhub latch arm 314 is switchable between a first state in which the striking surface is able to strike the second hub latcharm end surface 307 and a second state; in the second state, the striking surface cannot strike the second hub springarm end surface 307. According to an exemplary embodiment of the present invention, there is provided a lancet, wherein: the blood sampling pen protection structure is provided.

If the blood taking needle is directly arranged in the blood taking pen of the needle seat mode from the pen cap, a potential risk exists, namely, when the blood taking needle is not arranged in place, the blood taking needle is ejected from the pen cap hole by the loading and launching of the blood taking pen to cause injury to a user. The blood sampling pen provided by the embodiment of the utility model comprises a safety protection mechanism of the blood sampling pen, so that the situation that the blood sampling pen is ejected from a pen cap hole to cause injury to a user when the blood sampling needle is not installed in place can be effectively avoided.

The working principle of the protection mechanism of the blood sampling pen is explained by combining the figures 1-38: theneedle withdrawing rod 4 is assembled at the rear part of theneedle seat 3, the needle withdrawing rod head is assembled in theneedle seat hole 311, theneedle withdrawing rod 4 can move forwards until the second needle withdrawingrod surface 406 is contacted with the fifthneedle seat surface 306, and can move backwards until the first needle withdrawingrod surface 402 is contacted with the firstneedle seat surface 303.

The needle seat comprises a second needle seatelastic arm 314, and a needleseat sliding groove 312 is arranged at the tail part of the second needle seatelastic arm 314.

When theneedle withdrawing rod 4 moves forward until the second needle withdrawingrod face 406 contacts or does not completely contact with the fifthneedle seat face 306, the fourth catchingsurface 403 and the tenthneedle seat face 3041 are in a contact state, and the second needle seatelastic arm 314 is in an outwardly deformed state under the action of the fourth catchingsurface 403 and the tenthneedle seat face 3041, and the outwardly deformed state of the second needle seatelastic arm 314 is shown in fig. 33A-B.

When theneedle withdrawing rod 4 moves backward relative to theneedle holder 3, thesixth clamping surface 4032 of the needle withdrawing rod slides on the tenthneedle holder surface 3041, which is also called theoutermost side surface 4032, and continues to push theneedle withdrawing rod 4 backward until thefirst clamping surface 404 contacts with the thirdneedle holder surface 305, the second needle holderelastic arm 314 starts to deform inward under the relative acting force of the needle withdrawingrod surface 404 and the thirdneedle holder surface 305 of the needle holder sliding groove; after thethird clamping surface 4042 slides over thefourth seating surface 3051, thesecond clamping surface 4041 contacts thefourth seating surface 3051, and at this time, the firstneedle withdrawing surface 402 contacts or does not completely contact thefirst seating surface 303. The secondhub latch arm 314 is in a deformed, i.e., inwardly deformed, state toward the axis of the lancet, the inwardly deformed state of the secondhub latch arm 314 being shown in fig. 34A-B.

When theneedle withdrawing rod 4 moves forward relative to theneedle seat 3, thethird clamping surface 4042 slides across the fourthneedle seat surface 3051, and when the needle withdrawingrod surface 4031 contacts theneedle seat surface 3042, the second needle seatelastic arm 314 deforms outward under the relative acting force of thefifth clamping surface 4031 and the eleventhneedle seat surface 3042; after thesixth clamping surface 4032 slides on thetenth hub surface 3041, the second hubelastic arm 314 is in a deformed state towards the direction away from the axis of the blood collection pen.

When theneedle holder 3 and theneedle withdrawing rod 4 are in a state shown in fig. 15A-B without thelancet 17 installed, theneedle withdrawing rod 4 moves backward relative to theneedle holder 3 until thesixth clamping surface 4032 contacts the tenthneedle holder surface 3041, thesixth clamping surface 4032 provides an outward acting force on the tenthneedle holder surface 3041, and since the elastic force of the second needle holderelastic arm 314 itself is inward at this time, a certain resistance is generated in the process that thesixth clamping surface 4032 pushes away the tenthneedle holder surface 3041. This design effectively keeps the needle holder and the needle withdrawing rod in the state shown in fig. 15, and the state shown in fig. 33A-B is not released by the elastic force of the second needle holderelastic arm 314 itself or by external vibration and shaking.

Whenneedle holder 3 andneedle withdrawing rod 4 are in the state of being mounted withblood collection needle 17 as shown in fig. 16A-B,needle withdrawing rod 4 moves forward relative toneedle holder 3 untilthird latching surface 4042 contacts with fourthneedle holder surface 3051, andthird latching surface 4042 applies a force inward to fourthneedle holder surface 3051, and since the elastic force of second needle holderelastic arm 314 itself is outward at this time, there is a certain resistance in the process thatthird latching surface 4042 slides over fourthneedle holder surface 3051. The design can effectively enable theneedle seat 3 and theneedle withdrawing rod 4 to be in the state shown in fig. 16A-B, and the state shown in fig. 34A-B can not be relieved under the self elastic action or the external vibration, the shaking and the inertia action of the second needle seatelastic arm 314.

In the absence of the retractionrod lateral side 4032 and the third catch surface 4042 (as shown in fig. 36), the retraction rod and the hub may be engaged to achieve the outwardly-spaced condition of the second hubresilient arm 314 shown in fig. 33A-B and the inwardly-engaged condition of the second hubresilient arm 314 shown in fig. 34A-B.

In the absence of the fourth hub surface 3051 (as shown in fig. 35), theneedle withdrawing rod 4 and thehub 3 can be engaged to achieve the outward separation state of the second hubelastic arm 314 shown in fig. 33A-B and the inward combination state of the second hubelastic arm 314 shown in fig. 34A-B.

Thepressing portion 411 of the retreating lever may be cylindrical, square or polygonal, and irregular in shape.

Optionally, the number of the second needle hubelastic arms 314 may be 1 or 2; the number of the needle withdrawing rod end faces 410 can be 1 or 2;

the natural state of secondhub latch arm 314 may be as shown in fig. 4A and 4B, with outward or inward deformation of secondhub latch arm 314 requiring a needle retraction force.

The natural state of the second needle holderelastic arm 314 may be as shown in fig. 37, and the second needle holderelastic arm 314 is deformed inward to require the action of the needle withdrawing rod and is deformed to be close to the elasticity of itself in the direction away from the axis of the lancet pen.

The natural state of the second needle holderelastic arm 314 may be as shown in fig. 38, and the outward deformation of the second needle holderelastic arm 314 requires the force of withdrawing the needle rod, and the deformation is close to the axis of the lancet and depends on the elasticity of itself.

The operation of the lancet is described below with reference to fig. 1-38: as shown in fig. 15A and 15B, when the lancet is in the needle-loading-unloading state, the first needle-withdrawingface 402 contacts with the firstneedle seat face 303, the seventhneedle seat face 309 contacts with the thirdguide sleeve face 510, and theeighth needle face 909 and thefirst body face 610 are on the same plane under the action of the launching spring; the first needle withdrawingkey surface 801 is in contact with or not in complete contact with thefourth body surface 612, theneedle withdrawing rod 4 is positioned in the front of theneedle seat 3, and the second needle seatelastic arm 314 is in an outward deformation state.

As shown in fig. 16A to 18, thelancet 17 is loaded from thecap hole 103, thelancet 17 pushes the retreatingblade 4 to move backward until thelancet 17 is engaged with thehub 3, and the retreatingblade 4 is pushed to the rearmost part of thehub 3 to deform thesecond hub arm 314 inward.

After theblood taking needle 17 is installed, the needle cap is twisted off. Pulling thetail cap 13 backwards until thesixth mandrel surface 906 contacts with the first adjustingsleeve surface 1006, and loosening the tail cap, wherein thesecond mandrel surface 903 is clamped with the firstguide sleeve hole 502; the tail cap is returned to the normal state by thethird spring 16, at which time thesecond spring 15 is compressed and acts on theeighth plunger face 909. The blood sampling pen is in a cocked state to be launched at the moment.

When thelaunch key 7 is pressed, the launchkey bulge 701 pushes the tenthcore rod surface 910 inwards, so that thecore rod 9 bends and deforms inwards, the secondcore rod surface 903 is not engaged with the firstguide sleeve hole 502 any more, thecore rod 7 moves forwards in the axial direction under the action of thesecond spring 15, and when the end surface of thesecond spring 15 is contacted with thefirst body surface 610, thesecond spring 15 stops moving; thecore bar 9 continues to move axially forward under the action of inertia, at this time, the firstcore bar surface 901 contacts with the second needle seat elastic arm end surface 307 (as shown in fig. 19 and fig. 20), thecore bar 9 pushes theneedle seat 3 to move axially and simultaneously, and when theneedle seat 3 moves forward, the retreatingrod 3 and theblood taking needle 17 are driven to move forward; when theseventh face 907 contacts the first body 610 (as shown in fig. 21), the forward movement of thestem 9 is stopped, and then the stem is returned to the initial state by thethird spring 16.

After thecore rod 9 stops moving forward, theneedle seat 3 continues to move forward axially under the action of inertia, when the sixthneedle seat surface 308 contacts with the first pen capinner core surface 205, theneedle seat 3 stops moving forward, at this time, the blood taking needle moves to the farthest end relative to thepen cap 1, and the needle point is exposed out of the pen cap for the longest time (as shown in fig. 22);

then, theneedle holder 3 moves backward under the action of thefirst spring 14 until the seventhneedle seat surface 309 comes into contact with the thirdguide sleeve surface 510; the state of the lancet at this time is shown in fig. 23.

When the needle seat is impacted to start to move forwards to the foremost end and finally return to the initial state, the blood taking needle and the needle seat are always in a relatively fixed state.

According to an exemplary embodiment of the present invention, there is provided a lancet, including:needle file 3, withdraw ofneedle pole 4, wherein: the needle stand is formed with aneedle stand hole 311; theneedle withdrawing rod 4 comprises a needle withdrawing rod head part, a needle withdrawing rod middle part and a needle withdrawing rod tail part; the head of the needle withdrawing rod can be arranged in theneedle seat hole 311 in a way of moving along the axial direction of the blood taking needle; the middle part of the needle withdrawing rod is provided with a needle withdrawing rod limiting part; the retreating needle bar limiting part is used for limiting the axial moving range of the retreatingneedle bar 4 along the blood sampling pen in theneedle seat hole 311.

After the blood collection is completed, the needle is ready to be withdrawn, and the needle tip is inserted into the needle cap before the needle is withdrawn, as shown in fig. 24A, 24B and 24C. It should be noted that the needle can be withdrawn normally without inserting the needle tip of the blood lancet into the needle cap, and the purpose of inserting the needle tip of the blood lancet into the needle cap is to prevent the needle tip from being exposed to cause accidental injury to people after the blood lancet falls off.

Theneedle withdrawing key 8 is pushed to enable the needle withdrawing key 8 to move forwards axially relative to themain body 6 and theguide sleeve 5.

When theneedle withdrawing key 4 is pushed forwards, the needle withdrawingpush rod 802 pushes thepush part 408, so that the needle withdrawing rod moves forwards and axially, theend surface 410 of the needle withdrawing rod is in contact with the end surface of the tail part of theblood taking needle 17, and the blood taking needle and the needle seat are in a relatively fixed state (the clamping force of the blood taking needle and the needle seat is greater than the acting force of thefront spring 14 on the needle seat, but optionally, the clamping force of the blood taking needle and the needle seat can be smaller than the acting force of thefront spring 14 on the needle seat, at the moment, the surface of the needle seat does not need to contact theinner core surface 205 of the pen cap, and the blood taking needle can be withdrawn, which is also within the protection range of the utility model), so that the needle withdrawing rod drives the blood taking needle and the needle seat to move forwards simultaneously.

The needle seat moves forward until the needle seat stops moving axially when the first pen capinner core surface 205 contacts with the needle seat, theneedle withdrawing key 8 continues to push theneedle withdrawing rod 4 to move forward, and the needle withdrawingrod end surface 410 pushes the tail end surface of theblood taking needle 17, so that theneedle withdrawing rod 4 and theneedle seat 3 generate relative displacement. When the retreatingneedle bar 4 and theneedle holder 3 move relatively, the retreating needle withdraws thelancet 17 from the needle holder holding groove (as shown in fig. 25A, 25B, 25C, and 25D), and the lancet falls off. At this time, the withdrawing rod moves to the front end of the needle seat relative to the needle seat, and the second needle seatelastic arm 314 keeps a deformation state towards the axial direction far away from the blood sampling pen.

The needle withdrawing key is pulled backwards to the state before needle withdrawing, and the states of all parts of the blood sampling pen are shown in figures 26A and 26B.

In the case of not loading a blood collection needle or the blood collection needle is not completely clamped into theneedle seat 3, the needle withdrawing rod is in a state relative to the needle seat as shown in fig. 15A and 15B, and the second needle seatelastic arm 314 is in a deformation state towards the direction far away from the axis of the blood collection pen; at this time, the lancet is loaded and launched, and thefirst plunger surface 901 cannot always contact the second hub elasticarm end surface 307 in the process that theplunger 9 moves until theseventh plunger surface 907 contacts thefirst body surface 610, as shown in fig. 27A, 27B and 28, so that the hub does not move forward. Even if there is an unengaged lancet in the hub, the lancet does not fly out of thecap hole 103 as shown in fig. 28.

If the blood taking pen adopts a mode of directly loading the blood taking needle from theend hole 103 of the pen cap, if the needle seat does not have the function of elastic arm deformation, the needle seat can be always contacted with the inner core in the launching process, and the needle seat moves forwards under the action of the inner core during each launching; if the blood taking needle is not installed in the clamping groove of the needle seat, or the blood taking needle does not completely fall off during withdrawal of the needle, the inner core is charged again to trigger the inner core, the inner core impacts the needle seat to move forwards, the blood taking needle is driven to move forwards, and the blood taking needle can fly out from thepen cap hole 103 due to the fact that the blood taking needle is not fixed with the needle seat, so that injury is caused to personnel.

According to an exemplary embodiment of the utility model: the utility model provides a blood sampling pen, comprising: guidesleeve 5, withdraw of theneedle pole 4 andcore bar 9, wherein: theguide sleeve 5 comprises a firstguide sleeve surface 501, and the firstguide sleeve surface 501 is made of transparent materials or is formed with a hollow structure; in the state that the blood taking needle is not loaded, at least part of thecore bar 9 can be seen through the firstguide sleeve surface 501; in the lancet loading state, at least a part of thelancet retreating shaft 4 is visible through the firstguide sleeve surface 501.

Thefirst guide surface 501 is a visible window (transparent material can be used, or the position can be hollowed out).

When the lancet is not loaded (as shown in fig. 15A and 15B, and fig. 16A and 16B), the view of the lancet is blocked by the eleventhcore bar surface 911 when the lancet is viewed from the firstguide sleeve surface 501 toward the inside of the lancet, and the lancet withdrawing rod cannot be seen.

When the blood sampling pen is in a loading state (as shown in fig. 17A-B), theneedle withdrawing rod 4 can be seen from the guide sleeve window to the interior of the blood sampling pen.

Thecore bar 9 and theneedle withdrawing rod 4 of the blood sampling pen component are molded into different colors, and when the blood sampling pen is not loaded, the color of thecore bar 9 is seen from a window of the guide sleeve; when the blood sampling pen is loaded, the color of the needle withdrawing rod is seen from the firstguide sleeve surface 501; by observing the color of the firstguide sleeve surface 501, whether the blood sampling pen is in the loading state or the non-loading state can be judged.

Most of the traditional blood sampling pens adopt a mode of printing mark lines on the surface of a component through ink to display the loading and non-loading states. Printing inks are demanding in terms of production environment and can cause contamination and risk ink falling. The color of the part is used as the loading indication, so that the device is safer, more environment-friendly and more reliable.

According to an exemplary embodiment of the utility model: the blood taking needle has a puncture force adjusting function. When thetail cap 13 is rotated, thetail cap 13 drives the adjustingsleeve 10 to rotate, and meanwhile, the axial relative position of the adjustingsleeve 10 and themain body 6 is changed, and the relative distance between the first adjustingsleeve surface 1006 and the firstmain body surface 610 is changed; since one end of thesecond spring 15 contacts with theeighth plunger surface 909, the position of theeighth plunger surface 909 is not changed, and the other end of thesecond spring 15 contacts with the first adjustingsleeve surface 1006, when the position of the adjustingsleeve 10 changes relative to themain body 6, the compression amount of thesecond spring 15 changes, the thrust of the spring to theplunger 9 also changes, the impact force of theplunger 9 to theneedle seat 3 changes, the thrust of theneedle seat 3 to theblood taking needle 17 changes, and the puncture force of theblood taking needle 17 to the skin also changes.

When thetail cap 13 is rotated to drive the adjustingsleeve 10 to rotate to the nearest end (as shown in fig. 29) relative to the firstmain body surface 610, when the blood sampling pen is loaded, the compression amount of thesecond spring 15 is relatively maximum, the pushing force to thecore rod 9 is also large during emission, the driving force of thecore rod 9 to theneedle seat 3 is also large, and therefore the puncture force of the blood sampling needle is also large.

When thetail cap 13 is rotated to drive the adjustingsleeve 10 to rotate to the farthest end (as shown in fig. 30) relative to the firstmain body surface 610, when the blood sampling pen is loaded, the compression amount of thesecond spring 15 is relatively minimum, the pushing force on thecore rod 9 is small during emission, the driving force of thecore rod 9 on theneedle seat 3 is small, and therefore the puncture force of the blood sampling needle is small.

The pain of the blood sampling pen can be influenced by the change of the puncture force, and the blood sampling requirements of skins with different thicknesses can be met.

According to an exemplary embodiment of the utility model: the blood sampling pen has the function of adjusting the puncture depth. Rotatory bloodsampling pen cap 1, the cooperation of first cap muscle 101 (the muscle can be cylindrical or square, and quantity can be 1 or a plurality of) and first capinner core groove 201 ofcap 1, can makecap 1 produce axial relative displacement with capinner core 2 when the pivoted.

When theblood taking needle 17 is launched, the position of theblood taking needle 17 and theneedle seat 3 is fixed, and when theneedle seat 3 moves to the sixthneedle seat surface 308 to contact with the first cap inner core surface 205 (as shown in fig. 22), the position of the foremost end of the needle tip of theblood taking needle 17 relative to the pen capinner core 2 is fixed.

When thepen cap 1 is rotated to the nearest end relative to the pen capinner core 2 and the blood taking needle moves to the forefront end relative to the pen capinner core 2, the needle point of theblood taking needle 17 is exposed out of the pencap end surface 104 for the longest distance (as shown in fig. 31), and the skin penetration depth is the deepest.

When the pen cap is rotated to the farthest end relative to the pen cap inner core, when the blood taking needle moves to the most front end relative to the pen cap inner core, the distance of the needle point of the blood taking needle exposed out of theend surface 104 of the pen cap is the shortest (as shown in fig. 32), and the skin penetration depth is the shallowest.

According to an exemplary embodiment of the utility model: the blood taking pen has the function of preventing the blood taking needle from shaking. During the movement of theneedle seat 3, the eighthneedle seat surface 310 is engaged with the pen cap innercore sliding surface 206, and the ninthneedle seat surface 313 is engaged with the pen cap inner core elasticarm end surface 209. Theend surface 209 of the elastic arm of the pen cap inner core is interfered with the ninthneedle seat surface 313 in design, and theelastic arm 208 of the pen cap inner core has elasticity, so that theend surface 209 of the elastic arm of the pen cap inner core is tightly attached to the ninthneedle seat surface 313 in the forward movement process of theneedle seat 3, and the shaking and the vibration of the needle seat in the movement process can be reduced. The number of the cap coreelastic arms 208 may be 1 or more.

The blood sampling pen is safer in use. In the use process of the blood sampling pen, the needle tip can be exposed out of the front end of the pen cap at the moment of blood sampling emission, and the needle tips in all other operation steps are protected and cannot be exposed to cause accidental injury to users.

It should be noted that the above technical solutions can be combined arbitrarily in a logical situation, and are within the protection scope of the present invention.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments and combinations of elements without departing from the principles and spirit of the utility model, the scope of which is defined in the claims and their equivalents.

Claims (17)

1. A lancing pen, comprising:

a hub adapted to mount a blood collection needle (17), the hub having a second hub spring arm (314) formed with a second hub spring arm end surface (307);

the core rod is provided with a first core rod surface, and the first core rod surface is an impact surface;

the striking surface is suitable for striking the second needle seat elastic arm end surface (307) to shoot the blood taking needle (17);

the second needle seat elastic arm (314) can be switched between a first state and a second state, and in the first state, the impact surface can impact the second needle seat elastic arm end surface (307); in the second state, the striking surface cannot strike the second needle seat elastic arm end surface (307).

2. The lancing pen according to claim 1,

in the first state, the second needle seat elastic arm (314) deforms towards the direction close to the axis of the blood sampling pen;

in the second state, the second needle seat elastic arm (314) deforms towards the direction far away from the axis of the blood sampling pen.

3. The lancing pen according to claim 1,

the lancet further comprises a needle retraction lever adapted to interact with a second needle hub spring arm (314) to switch between a first state and a second state.

4. The lancing pen according to claim 3,

the second needle seat elastic arm (314) is formed with a needle seat sliding groove (312), the needle withdrawing rod is formed with a pressing portion (411), and the pressing portion (411) is suitable for sliding in the needle seat sliding groove (312) to press the second needle seat elastic arm (314) to switch between a first state and a second state.

5. The lancing pen according to claim 4,

the pressing part (411) is suitable for pressing the second needle seat elastic arm (314) to deform towards the axial direction close to the blood collection pen when the needle withdrawing rod is located at the needle loading position, so that the impact surface impacts the second needle seat elastic arm end surface (307) to launch the blood collection needle (17); and when the needle withdrawing rod is positioned at the needle withdrawing position, the second needle seat elastic arm (314) is extruded to deform towards the axis direction far away from the blood taking pen, so that the impact surface cannot impact the second needle seat elastic arm end surface (307) to prevent the blood taking needle (17) from being launched.

6. The lancing pen according to claim 4,

the needle seat comprises a second needle seat part, and the second needle seat elastic arm (314) is formed on the second needle seat part; the second needle seat part is also provided with a needle seat hole (311);

the needle withdrawing rod comprises a needle withdrawing rod head, a needle withdrawing rod middle part and a needle withdrawing rod tail part, the needle withdrawing rod head is suitable for being assembled in the needle seat hole, and the extrusion part (411) is formed at the needle withdrawing rod tail part.

7. The lancet pen of claim 6, wherein the hub comprises a first hub portion formed with a first hub housing formed with a hub opening (301), the hub opening (301) adapted for passage of a body of the lancet.

8. The lancet according to claim 7, wherein the first needle holder portion is formed with a first needle holder elastic arm (302), the first needle holder elastic arm (302) being for fixing a body of the lancet (17).

9. The lancing pen according to claim 1,

the blood sampling pen also comprises a pen cap inner core (2) which is provided with a pen cap inner core elastic arm (208);

the needle seat is provided with a ninth needle seat surface (313);

a part of the needle base is positioned in the pen cap inner core (2), and the end surface (209) of the pen cap inner core elastic arm (208) is matched with the ninth needle seat surface (313).

10. The lancing pen of claim 1, further comprising:

a main body (6);

a tail cap (13) disposed at a distal end of the body (6) adapted to rotate relative to the body (6);

an adjusting sleeve (10) at least partially arranged inside the tail cap (13);

wherein the rotation of the tail cap (13) is suitable for driving the adjusting sleeve (10) to axially move so as to adjust the puncture force of the blood lancet (17).

11. The lancing pen of claim 1, further comprising: uide bushing (5) and withdraw of needle pole, wherein:

the guide sleeve (5) comprises a first guide sleeve surface (501), and the first guide sleeve surface (501) forms a visual window;

in the uncocked state of the blood taking needle, the core bar presents a first visible part through the first guide sleeve surface (501);

in the blood taking needle loading state, the needle withdrawing rod presents a second visible part through the first guide sleeve surface (501).

12. The lancing pen according to claim 11,

the core bar can move along the axial direction of the blood sampling pen, when the blood sampling pen is in a non-loading state, the core bar is in a first position, and when the blood sampling pen is in a loading state, the core bar is in a second position;

in the first position, the core bar shields the second visible part of the withdrawing rod;

in the second position, the core bar does not block the second visible part of the withdrawing rod.

13. The lancing pen according to claim 12,

the core rod comprises an extension part, wherein a tenth core rod surface (911) is formed on the extension part, and in the first position, the tenth core rod surface (911) shields the second visible part of the withdrawing rod.

14. The lancing pen according to claim 13,

the core rod is formed with a core rod elastic arm, which is formed with a locking portion adapted to lock the core rod at the second position, and an extending portion from the locking portion toward a free end of the core rod elastic arm constitutes the extending portion.

15. The lancing pen of claim 14, further comprising:

and a transmission key (7) which can release the locking of the core rod position by the locking part by pressing the transmission key.

16. The lancing pen according to claim 11,

the first and second visible portions form different colors and/or indicia.

17. The lancing pen of claim 16,

the core rod and the needle withdrawing rod are different in color.

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