It is a kind of can the withdraw of the needle blood collecting pen and assemble methodTechnical field
The present invention relates to the field of medical instrument technology, more particularly to it is a kind of can the withdraw of the needle blood collecting pen and assemble method.
Background technique
Blood collecting pen is a kind of hemostix of pen type, is used cooperatively with disposable sterilized blood taking needle, and human body tip blood sample is acquiredManual rebound type assist blood-taking device.After the completion of blood sampling, since syringe needle has been stained with blood of human body, so must will makeUsed syringe needle is handled, so as not to medical staff or other people by needlestick injuries.Existing blood collecting pen, which does not have much, to move backNeedle function, it is not convenient or even can accidentally injure operator to take down blood sampling stylus after use, has some blood collecting pens to have withdraw of the needle function, but graspMake cumbersome.
It is side setting withdraw of the needle key for the withdraw of the needle mode that existing blood collecting pen generallys use, when use may require that both hands operateOr since structure limitation withdraw of the needle key is smaller, it is not easy to operator's gripping.
Summary of the invention
The present invention is directed to above-mentioned technical problem of the existing technology, provide it is a kind of it is easy to use, can the withdraw of the needle adoptBlood pen and assemble method.
The present invention is adopted the technical scheme that solve technical problem present in well-known technique：
It is a kind of can the withdraw of the needle blood collecting pen, mainly include the pen cap, percussion withdraw of the needle structure, blood taking needle, tail cap and pen cap；
The percussion withdraw of the needle structure includes guide sleeve, inner core, withdraw of the needle key, withdraw of the needle inner core, elastic component and key；
The shim that the pen cap is divided into two cavitys is radially equipped in the pen cap；The guide sleeve is plugged on the penIn set；The notch cooperated with the withdraw of the needle key is equipped in guide sleeve end；The radial end face of the notch can be with the withdraw of the needle keyEngaging；Guide sleeve side wall is equipped with the through-hole four that can be engaged with inner core；The limit of control inner core Forward distance is equipped with inside guide sleeveBit architecture；
The inner core includes the needle stand portion of fixed blood taking needle, and needle stand portion end is connected with for being arranged in elastic componentCore arms；It is equipped with the first chuck on the outside of the needle stand portion, is equipped with the second chuck, the first chuck and the second chuck on the outside of the interior core armsPositioned at apart from the closer shim side of blood taking needle；The elasticity cooperated with the through-hole four is equipped on the outside of second chuckArm；Interior core arms end is equipped with reversed acanthoid hanging platform；The needle stand portion is first to enter direction to be socketed on the inside of guide sleeve with notch direction；?The interior core arms end set is removably equipped with the baffle for preventing elastic component from deviating from；
The withdraw of the needle key is located inside the pen cap；Withdraw of the needle key includes convex ribs one and the hollow shell for being located at one end of convex ribsBody；The hollow shell body is located at apart from the closer shim side of tail cap；
The withdraw of the needle inner core is L shape, withdraw of the needle inner core include convex ribs two and limit first chuck and the second chuck itBetween hanging platform；
The elastic component includes the transmitting spring, reset spring one, reset spring two being set in the interior core arms；It is describedTransmitting spring is limited between shim side and second chuck；The reset spring one be located at the shim other side withBetween the cavity shell, the reset spring two is located between the cavity shell and the baffle；
The key is assemblied on the side wall of the pen cap；The key is equipped with trigger point；The trigger point and the elastic armContact；
A part of the tail cap is set in the pen cap；The open end of tail cap and the withdraw of the needle key section are socketed.
Preferably, being equipped in the pen cap can be with the positioning bar of guide sleeve grafting；Guide sleeve lateral surface is equipped with and the positioning barThe locating slot of cooperation；
Preferably, the guiding rib with the inner core grafting is equipped in the inner wall of guide sleeve；It is equipped with and institute on the outside of needle stand portionState the guide groove two of guiding rib grafting；
Preferably, the position limiting structure includes the guide groove one being located inside guide sleeve with the inner core grafting, described to leadConfined planes are equipped with along inner core direction of insertion to the top of slot one；It is equipped on the outside of the needle stand portion and cooperates with the guide groove oneGuide pad；
Preferably, the cavity hull outside is equipped with cyclic annular muscle, and tail cap inner wall is equipped with the groove cooperated with cyclic annular muscle；
Preferably, the radial end face of the notch is inclined guide surface inwardly, the top surface of the convex ribs one with it is describedGuide surface matching；
Preferably, the convex ribs one are axially arranged with cambered surface along the pen cap, and the internal diameter of cambered surface is greater than the outer diameter of hanging platform；
It is furthermore preferred that it is a kind of to it is above-mentioned can the withdraw of the needle the method that is assembled of blood collecting pen, include the following steps：
S1, assembling inner core：The withdraw of the needle inner core is introduced into hanging platform, enter after convex ribs two be sequentially inserted into it is described inCore, specially：Convex ribs two are entirely insertable in through-hole five, and the hanging platform is limited between the first chuck and the second chuck；Transmitting spring is set on inner core arm；
S2, inner core mounted in S1 is pre-loaded into guide sleeve：The needle stand portion is from the notch end and the guide sleeveAlignment, then guiding rib is inserted into guide groove two, while guide pad insertion guide groove is until guide pad top surface and guide groove oneConfined planes abut；
S3, guide sleeve mounted in S2 is packed into the pen cap：The reversed acanthoid hanging platform is directed at pen cap front end face (pen cap front endFace refers in the pen cap apart from the closer end face of blood taking needle), and the positioning bar of the locating slot of guide sleeve and the pen cap cooperates, and will be oriented toSet is inserted into the pen cap, abuts the bottom surface of annular convex shoulder with the front end face of the pen cap；
S4, reset spring one is inserted in S3 in mounted interior core arms：By reset spring one from reversed acanthoid hanging platform one endIt is inserted in interior core arms, one end of reset spring one is made to be connected to shim；
S5, installation withdraw of the needle key：Withdraw of the needle key is placed in the one end of the pen cap far from blood taking needle, leads to convex ribs one against describedHole two, be introduced by convex ribs one, enter after cavity shell in a manner of be packed into the pen cap, until the other end top of reset spring one is heldInto hollow shell body；
S6, installation reset spring two and baffle：Successively from reversed acanthoid hanging platform side by reset spring two and baffle setEnter interior core arms, is clamped baffle and the reversed acanthoid hanging platform of interior core arms end；
S7, it is packed into tail cap：The open end of tail cap is pressed into against reversed acanthoid hanging platform, until tail cap open end and the withdraw of the needleKey is abutted against along portion, and cyclic annular muscle enters in groove；
S8, installation key：The trigger point of key is passed through into the through-hole three and the elastic arm contact；The tail portion graftingBetween the guide sleeve and the pen cap；
S9, the blood taking needle is packed into needle stand portion and fixation, the pen cap on blood taking needle outer sheath.
The invention has the advantages and positive effects that：
Present invention employs percussion withdraw of the needle structure, and the tail cap by blood collecting pen rear end is arranged in is arranged in the inside of blood collecting penPercussion withdraw of the needle structure Forward is pushed, so that blood taking needle be pushed to be detached from needle stand portion, blood sampling and withdraw of the needle process are coherent, it is easy to operate, haveEffect avoids security risk caused by common blood collecting pen withdraw of the needle inconvenience.
Compared with prior art, the present invention have safety and sanitation, avoid cross contamination, be simple and compact for structure, is easy to operate,The advantages that stable connection, wide use scope, can be widely applied to health care health industry.
Detailed description of the invention
Fig. 1 is the transmitting spring of the preferred embodiment of the present invention by the main view (removing pen cap) after precompressed；
Fig. 2 is the sectional view along A-A of Fig. 1；
Fig. 3 is the C-C of Fig. 1 to cross-sectional view；
Fig. 4 is the main view of the pen cap of the preferred embodiment of the present invention；
Fig. 5 is the sectional view along A-A of Fig. 4；
Fig. 6 is the perspective view of Fig. 4；
Fig. 7 is the left view of Fig. 4；
Fig. 8 is one of perspective view of guide sleeve of the preferred embodiment of the present invention；
Fig. 9 is the two of the perspective view of the guide sleeve of the preferred embodiment of the present invention；
Figure 10 is one of main view of guide sleeve of the preferred embodiment of the present invention；
Figure 11 is the C-C of Figure 10 to cross-sectional view；
Figure 12 is the F-F of Figure 10 to cross-sectional view；
Figure 13 is the left view of Figure 10；
Figure 14 is the two of the guide sleeve main view of the preferred embodiment of the present invention；
Figure 15 is the main view of the inner core of the preferred embodiment of the present invention；
Figure 16 is the E-E of Figure 15 to cross-sectional view；
Figure 17 is the perspective view of the inner core of the preferred embodiment of the present invention；
Figure 18 is the main view of the withdraw of the needle key of the preferred embodiment of the present invention；
Figure 19 is the left view of Figure 18；
Figure 20 is the perspective view of the withdraw of the needle inner core of the preferred embodiment of the present invention；
Figure 21 is the cross-sectional view of the tail cap of the preferred embodiment of the present invention；
Figure 22 is the perspective view of the key of the preferred embodiment of the present invention；
Figure 23 is the perspective view of the whole blood collecting pen of the preferred embodiment of the present invention；
Figure 24 is the main view of the unassembled pen cap of blood collecting pen of the preferred embodiment of the present invention；
Figure 25 is the sectional view along A-A of Figure 24；
The main view of the depressed power of tail cap when Figure 26 is the withdraw of the needle of the preferred embodiment of the present invention；
Figure 27 is the D-D of Figure 26 to cross-sectional view.
Wherein：
1, the pen cap；11, shim；11-1, through-hole one；11-2, through-hole two；11-3, through-hole three；11-4, positioning bar；
2, withdraw of the needle structure is fired；21, guide sleeve；21-1, locating slot；21-2, annular convex shoulder；21-3, through-hole four；21-4,Notch；21-4a, guide surface；21-5, guiding rib；21-6, guide groove one；21-6a, confined planes；22, inner core；22-1, needle stand portion；22-1a, the first chuck；22-1b, through-hole five；22-2, interior core arms；22-2a, the second chuck；22-2b, elastic arm；22-2b-1,Elastic arm top surface；22-2c, reversed acanthoid hanging platform；22-3, guide groove two；22-4, guide pad；22-4a, guide pad top surface；22-5,Baffle；23, withdraw of the needle key；23-1, convex ribs one；23-1a, cambered surface；23-2, cavity shell；23-2a, cyclic annular muscle；23-2b, through-holeSix；23-3, along portion；24, withdraw of the needle inner core；24-1, convex ribs two；24-2, hanging platform；25, elastic component；25-1, transmitting spring；25-2,Reset spring one；25-3, reset spring two；26, key；26-1, cover；26-2, trigger point；26-3, tail portion；
3, blood taking needle；
4, tail cap；41, open end；42, closed end；43, groove；
5, pen cap；51, needle outlet.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawingDetailed description are as follows：
Fig. 1 is please referred to Figure 27：
It is a kind of can the withdraw of the needle blood collecting pen, mainly include the pen cap 1, percussion withdraw of the needle structure 2, blood taking needle 3, tail cap 4 and pen cap 5；
The percussion withdraw of the needle structure 2 includes guide sleeve 21, inner core 22, withdraw of the needle key 23, withdraw of the needle inner core 24, elastic component 25 and pressesKey 26；
As shown in figs. 4-7, the pen cap 1 is axially hollow shell, and 1 middle part of the pen cap, which is radially equipped with, controls the elasticity1 cavity of the pen cap is divided into two by the shim 11 of 25 position of part, the shim 11；It is equipped with and supplies at the center of the shim 11One 11-1 of through-hole that inner core 22 passes through is equipped with two 11-2 of through-hole passed through for withdraw of the needle key 23 in shim 11 and 1 junction of the pen cap；Three 11-3 of through-hole of assembly key 26 is equipped on the side wall of the pen cap 1；Being equipped in cavity where three 11-3 of through-hole can be withThe positioning bar 11-4 of 21 grafting of guide sleeve.
As seen in figures 8-14, the guide sleeve 21 is plugged in the pen cap 1；Preferably, the guide sleeve 21 is axialHollow shell, 21 lateral surface of guide sleeve are equipped with the locating slot 21-1 cooperated with the positioning bar 11-4；It is set on the outside of guide sleeve 21There is the annular convex shoulder 21-2 engaged with 1 front end face of the pen cap；The side outer wall of guide sleeve 21 is equipped with and can abut with the inner core 22Four 21-3 of through-hole；The notch 21-4 cooperated with the withdraw of the needle key 23 is equipped in the other side outer wall end of guide sleeve 21；It is leadingThe guiding rib 21-5 with 22 grafting of inner core is equipped with to the inner wall of set 21；Control 22 forward pitch of inner core is equipped with inside guide sleeve 21From position limiting structure；The position limiting structure includes one 21-6 of guide groove for being located at 21 inside and 22 grafting of inner core of guide sleeve；The top of one 21-6 of guide groove is equipped with confined planes 21-6a along 22 direction of insertion of inner core.
As seen in figs. 15-17, the inner core 22 includes the needle stand portion 22-1 of fixed blood taking needle 3, the end needle stand portion 22-1End is connected with the interior core arms 22-2 for being arranged elastic component 25；The needle stand portion 22-1 is first to enter direction to be socketed in notch directionThe inside of guide sleeve 21；Preferably, two 22-3 of guide groove with the guiding rib 21-5 grafting is equipped on the outside of needle stand portion 22-1；The guide pad 22-4 engaged with one 21-6 of guide groove is equipped on the outside of the needle stand portion 22-1.On the outside of the needle stand portion 22-1Equipped with the second chuck 22-2a is equipped on the outside of the first chuck 22-1a, the interior core arms 22-2, the withdraw of the needle inner core 24 can be describedIt is moved axially between first chuck 22-1a and the second chuck 22-2a；Five 22-1b of through-hole, institute are equipped with inside the needle stand portion 22-1Stating withdraw of the needle inner core 24 can move axially along five 22-1b of through-hole；It is equipped with and the through-hole four on the outside of the second chuck 22-2aThe elastic arm 22-2b of 21-3 cooperation；The end of the interior core arms 22-2 is equipped with the reversed acanthoid hanging platform 22-2c of intermediate bifurcated；
As shown in Figure 1, it is preferred that the baffle 22- for preventing elastic component 25 from deviating from is arranged in the end interior core arms 22-25, the baffle 22-5 are located between the elastic component 25 and the reversed acanthoid hanging platform 22-2c.
As depicted in figs. 18-19, the withdraw of the needle key 23 is located inside the pen cap 1 by two 11-2 of through-hole, it is preferred thatWithdraw of the needle key 23 includes one 23-1 of convex ribs entered in the pen cap 1 across two 11-2 of through-hole, and the top direction of one 23-1 of convex ribs is adoptedSide where blood needle 3；The end of one 23-1 of convex ribs is equipped with cavity shell 23-2, and the cavity shell 23-2 is located in the pen cap 1,The cavity bottom shell 23-2 is equipped with six 23-2b of through-hole and passes through for inner core 22；
As shown in figure 20, the withdraw of the needle inner core 24 is L shape, and withdraw of the needle inner core 24 includes convex ribs two 24-1 and hanging platform 24-2；InstituteStating withdraw of the needle inner core 24 can pass through from five 22-1b of through-hole；The hanging platform 24-2 is limited in the first chuck 22-1a andBetween two chuck 22-2a and withdraw of the needle inner core 24 can be driven to move axially along the pen cap 1.Since two 24-1 of convex ribs is set as to lead toIt is free to move axially in five 22-1b of hole, so withdraw of the needle inner core 24 can be between the first chuck 22-1a and the second chuck 22-2aIt is free to move axially.
As shown in Figure 1, the elastic component 25 includes the transmitting spring 25-1 being set on the interior core arms 22-2, resets bulletOne 25-2 of spring, two 25-3 of reset spring；The transmitting spring 25-1 is limited in 11 side of shim and the second chuck 22-Between 2a；One 25-2 of reset spring is located between 11 other side of shim and the cavity shell 23-2, specifically, resettingThe end of spring enters inside cavity shell 23-2；Two 25-3 of reset spring be located at the bottom of the cavity shell 23-2 withBetween the baffle 22-5；
As shown in figure 21, the key 26 includes the cover 26-1 for user's pressing；Side-lower is equipped in cover 26-1Trigger point 26-2；The trigger point 26-2 is contacted by three 11-3 of through-hole with the elastic arm 22-2b；At cover 26-1Side is equipped with the tail portion 26-3 being axially arranged along the pen cap 1；The tail portion 26-3 be plugged on the guide sleeve 21 and the pen cap 1 itBetween, to guarantee 26 stable connection of key；
As shown in figure 22, the tail cap 4 is circular cylindrical cavity open at one end；A part of the tail cap 4 is set in instituteIt states in the pen cap 1；Preferably, the junction of the cavity shell 23-2 and one 23-1 of convex ribs is equipped with top and holds the tail cap 4Along portion 23-3；The open end 41 of tail cap 4 is socketed with described along the part portion 23-3, and the closed end 42 of tail cap 4 is pressing operation end；It is excellentChoosing, cyclic annular muscle 23-2a is equipped on the outside of the cavity shell 23-2,4 inner wall of tail cap is equipped with the groove cooperated with cyclic annular muscle 23-2a43, after cyclic annular muscle 23-2a engages with groove 43, it is ensured that tail cap 4 is connect firm with withdraw of the needle key 23.
As shown in figure 23, the pen cap 5 is located at the blood sampling end of blood collecting pen, and pen cap 5, which is equipped with, goes out needle with what blood taking needle 3 cooperatedMouth 51.
Preferably, the radial end face of the notch 21-4 is inclined guide surface 21-4a, one 23-1 of convex ribs inwardlyTop surface matched with the guide surface 21-4a；
Preferably, one 23-1 of convex ribs is axially arranged with cambered surface 23-1a along the pen cap 1, and the internal diameter of cambered surface 23-1a is greater than hanging platformThe outer diameter of 24-2, so that one 23-1 of convex ribs and hanging platform 24-2 can misplace relatively radially after assembly, it is non-interference.
A method of to it is above-mentioned can the blood collecting pen of the withdraw of the needle assemble, include the following steps：
Please refer to Figure 24,25：
S1, assembling inner core 22:The sequence withdraw of the needle inner core 24 is introduced into hanging platform 24-2, entered after two 24-1 of convex ribsIt is inserted into the inner core 22, specially：Two 24-1 of convex ribs is entirely insertable in five 22-1b of through-hole, and the hanging platform 24-2 is limitedBetween the first chuck 22-1a and the second chuck 22-2a；It will be emitted by the reversed acanthoid hanging platform 22-2c of the interior core arms 22-2Spring 25-1 is set on interior core arms 22-2；
S2, inner core 22 mounted in S1 is pre-loaded into guide sleeve 21：The needle stand portion 22-1 is from the end the notch 21-4It is aligned with the guide sleeve 21, then guiding rib 21-5 is inserted into two 22-3 of guide groove, while guide pad 22-4 is inserted into guide groove one21-6 is abutted until guide pad top surface 22-4a with the confined planes 21-6a of one 21-6 of guide groove；
S3, guide sleeve 21 mounted in S2 is packed into the pen cap 1：The reversed acanthoid hanging platform 22-2c is directed at 1 front end face of the pen cap(1 front end face of the pen cap refers in the pen cap 1 apart from the closer end face of blood taking needle 3), and the locating slot 21-1 of guide sleeve 21 and the pen cap 1Positioning bar 11-4 cooperation, inner core 22 is entirely insertable in the pen cap 1 by one 11-1 of through-hole, while making annular convex shoulder 21-2Bottom surface abutted with the front end face of the pen cap 1；
S4, one 25-2 of reset spring is inserted in S3 on mounted interior core arms 22-2：By one 25-2 of reset spring fromThorn-like hanging platform 22-2c is inserted in interior core arms 22-2 in one end, and one end of one 25-2 of reset spring is made to be connected to shim 11；
S5, installation withdraw of the needle key 23：Withdraw of the needle key 23 is placed in the described one end of the pen cap 1 far from blood taking needle 3, makes one 23-1 of convex ribsAgainst two 11-2 of through-hole, be introduced by one 23-1 of convex ribs, enter after cavity shell 23-2 in a manner of be packed into the pen cap 1, directlyIt is held in cavity shell 23-2 to the other end top of one 25-2 of reset spring；
S6, installation reset spring two 25-3 and baffle 22-5：Successively bullet will be resetted from the side reversed acanthoid hanging platform 22-2cSpring two 25-3 and baffle 22-5 are inserted in interior core arms 22-2, are clamped baffle 22-5 and reversed acanthoid hanging platform 22-2c；
S7, it is packed into tail cap 4：The open end 41 of tail cap 4 is pressed into against reversed acanthoid hanging platform 22-2c, until 4 open end of tail cap41 abut against with the withdraw of the needle key 23 along portion 23-3, and ring-type muscle 23-2a enters in groove 43；
S8, installation key 26：The trigger point 26-2 of key 26 is passed through into three 11-3 of through-hole and the elastic arm 22-2bContact；The tail portion 26-3 is plugged between the guide sleeve 21 and the pen cap 1；
S9, the blood taking needle 3 is packed into needle stand portion 22-1 and fixation, the pen cap 5 on 3 outer sheath of blood taking needle.
Working principle：
As shown in Figure 1-3, pulling the tail cap 4 before blood sampling, withdraw of the needle key 23 is made to drive inner core 22 to 4 direction of tail cap axial directionMobile, until elastic arm 22-2b enters four 21-3 of through-hole, revocation pulling force leads to elastic arm top surface 22-2b-1 mono- with describedFour 21-3 of hole is abutted, 22 axial retraction certain distance of inner core, such as 9mm at this time；At this time in view of axial position, convex ribs oneThe top surface of 23-1 has intersected with hanging platform 24-2, since the internal diameter of cambered surface 23-1a is greater than the outer diameter of hanging platform 24-2, radially twoPerson does not generate interference, so that the withdraw of the needle function of withdraw of the needle key 23 will not prove effective at this moment；Emit spring 25-1 by shim11 and second chuck 22-2a limitation and by precompressed.
When blood sampling, after needle outlet 51 is directed at blood sampling site, pressure is transmitted to elastic arm by pressing keys 26, trigger point 26-222-2b makes elastic arm 22-2b that the control that elastic deformation is detached from four 21-3 of through-hole occur, and the potential energy of transmitting spring 25-1 is releasedIt puts, is supplied to the forward puncture force of 3 axis of blood taking needle.When guide pad top surface, 22-4a touches confined planes 21-6a, inner core 22 stopsIt only moves axially, one 25-2 of reset spring being elongated at this time generates retraction, and inner core 22 is driven to be restored to original position, completes blood sampling functionEnergy.
As shown in Figure 26,27, when the withdraw of the needle, remove pen cap 5 first, pressing force F is applied to the closed end 42 of tail cap 4, makes to move backNeedle key 23 is moved axially to 51 direction of needle outlet, as the top surface of one 23-1 of convex ribs and the inclined-plane guide surface 21-4a mono- of notch 21-4After offseting, since two sides is inclined-plane, and one 23-1 of convex ribs has elasticity, and one 23-1 of convex ribs is made radially to bounce back, axial in continuationOne 23-1 of convex ribs resists hanging platform 24-2 in moving process, so that blood taking needle 3 be pushed to be detached from needle stand portion 22-1；Revocation pressing at this timePower, tail cap 4 are restored to original position under the action of two 25-3 of reset spring, complete withdraw of the needle function.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,It should not be considered as limiting the scope of the invention.Any changes and modifications in accordance with the scope of the present application,Should all still it return within patent covering scope of the invention.