CN112155563A - Safe blood taking needle structure - Google Patents

Abstract

The invention discloses a safety type blood taking needle structure, wherein a blood taking needle (8) is fixed in a shell (1), the unreasonable exposure of the blood taking needle (8) when the blood taking needle is not used can be avoided, when the blood taking needle (8) is used, the tail part of a needle bar fixing rod (2) is triggered through external force, the needle bar fixing rod (2) slides out from a positioning block (4), the blood taking needle (8) is further pushed, or an easy crack (12) is broken, and the blood taking needle (8) can be pushed to penetrate through a needle outlet (11) for blood taking. The safety blood taking needle has the advantages of simple structure and low manufacturing cost, can be operated by one hand or used with a matched blood taking pen by matching with different structures, can effectively ensure the safe blood taking operation, and is used in the field of medical instruments.

Description

Safe blood taking needle structure

Technical Field

The invention relates to the field of medical instruments, in particular to a safe blood taking needle structure.

Background

The existing individual blood taking needle is disposable, the individual blood taking needle is simply a triangular iron sheet or a needle rod fixing rod which is used for fixing a needle rod and is convenient to hold, no limiting device is arranged, the size and depth of a wound caused to a patient are determined completely by proficiency and experience of operation of a nursing staff. The pain is strong, so that part of patients escape and give up blood sampling examination due to fear, a clinician cannot obtain an inspection result and only needs personal experience to develop a treatment scheme, the misdiagnosis rate is high, and the condition of the patient is delayed.

The individual blood taking needles are mostly plastic films or are simply packaged with a cap additionally, the plastic films puncture or the cap falls off in the process of transporting, using and discarding the blood taking needles, the needle heads are exposed due to no shell protective layer, operators or third parties are injured by mistake, the pain is strong, the safety performance is poor, and even hematogenous pollution is formed.

However, such blood collection needles are still used in most medical institutions due to their low price.

Some individual blood taking needles can be matched with a blood taking pen for use, but the individual blood taking needles need to expose needles in the installation and/or disposal process, operators can be accidentally injured due to the exposure of the needles, and the safety performance is poor. And the personal blood taking needle needs to be placed in the blood taking pen, part of patients bring blood into the blood taking pen due to large bleeding amount, ejection and recovery parts of the blood taking pen cannot be replaced every time, thorough cleaning is difficult, and serious hidden danger of blood cross contamination is formed.

The safety blood taking needle is adopted in the market at present, is provided with a limiting device and a shell protective layer, can automatically retract after being triggered, is disposable and has good safety performance. However, the structure is complex, the number of components is large, the manufacturing process is complex, the price is high, the purchase and use cost of a hospital is increased, and the popularization is difficult, so that only a part of major infectious disease prevention and treatment mechanisms or medical mechanisms with good economic conditions are applied.

Clinically, a practical and safe blood taking needle with simple structure, easy manufacture, low price is needed.

Disclosure of Invention

In order to solve the problems, the invention provides a safe blood taking needle structure which is simpler in structure, low in manufacturing cost and capable of effectively guaranteeing safety.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a safe blood taking needle structure comprises a shell, a needle bar fixing rod and a blood taking needle, wherein the needle bar fixing rod is positioned in the shell, the blood taking needle is fixed on the needle bar fixing rod, a needle outlet is formed in the shell, and a positioning block for fixing the needle bar fixing rod or a connecting point with an easy crack is arranged between the needle bar fixing rod and the shell; the bottom of the shell is a needle seat, the tail end of the needle bar fixing rod is fixed on the needle seat, a bending opening is arranged on the needle seat, and a shell fixing buckle is arranged on the outer side of the shell in an extending mode.

As a further improvement of the technical scheme of the invention, the blood taking needle is a needle-shaped sharp object.

Further as an improvement of the technical scheme of the invention, the needle bar fixing rod extends forwards to be provided with a needle point protection rod.

As further improvement of the technical scheme of the invention, the joint of the needle point protection rod and the needle rod fixing rod is provided with an easy-to-crack part.

The needle bar fixing rod is provided with a limiting device which is arranged on two sides of the needle bar fixing rod in an outward extending mode, and the shell is internally provided with a resetting device which is matched with the limiting device to enable the needle bar fixing rod to reset.

As a further improvement of the technical scheme of the invention, the resetting device is an elastic rod which is formed by extending the shell inwards and inclines towards the bottom of the shell.

As further improvement of the technical scheme of the invention, the shell is provided with stop baffles at two sides of the needle outlet, and the maximum width of the top end of the needle bar fixing rod is greater than that of the needle outlet.

Further as an improvement of the technical scheme of the invention, a positioning block for fixing the needle bar fixing rod is arranged between the needle bar fixing rod and the shell.

Further as an improvement of the technical scheme of the invention, the two sides of the needle bar fixing rod in the shell are provided with reset blocks, each reset block is provided with an arc-shaped groove, the two sides of the needle bar fixing rod extend to be provided with a bulge which can be clamped into the arc-shaped groove when the needle bar fixing rod is reset, and the arc-shaped groove is provided with a notch which can lead the bulge into the arc-shaped groove.

As a further improvement of the technical scheme of the invention, a connecting point with easy crack is arranged between the needle bar fixing rod and the shell.

The needle bar fixing rod is further improved in the technical scheme that the tail end of the needle bar fixing rod extends to be provided with a reset clamp, the reset clamp is clamping rods with two symmetrical sides, and each clamping rod is provided with a clamp facing the inner side.

The invention further provides an improvement of the technical scheme, an extension arm matched with the tail end of the shell is arranged at the tail end of the shell in an extending mode, a loading position is arranged in the extension arm, and at least one loading position is arranged in the extension arm.

As further improvement of the technical scheme of the invention, the bottom of the extension arm is provided with an opening, and the tail end of the extension arm is provided with a composite locker which is matched with the composite locking hole on the blood sampling pen for fixing.

As further improvement of the technical scheme of the invention, the composite locker is two convex blocks symmetrically arranged in the extension arm.

As a further improvement of the technical scheme of the invention, the tail end of the needle bar fixing rod is provided with a firing rod extending backwards.

As a further improvement of the technical scheme of the invention, the tail end of the needle bar fixing rod is provided with a supporting plate extending outwards.

The upper end of the shell is narrowed towards the top, and a needle bar fixing rod moving guide rail for guiding the needle bar fixing rod to slide is further arranged in the shell.

As a further improvement of the technical scheme of the invention, the top end of the shell is extended and provided with an outward extensible skin tensioner.

The invention has the beneficial effects that: this safe formula blood taking needle structure fixes the blood taking needle in the casing, can avoid the unreasonable exposure of blood taking needle when not using, triggers needle bar dead lever afterbody through external force when the blood taking needle uses, with the needle bar dead lever from the locating piece roll-off, and then promote the blood taking needle, perhaps make the easy breach disconnection, can promote the blood taking needle and pass out the needle mouth and take a blood sample, this safe formula blood taking needle cooperation different structures can reach the purpose of one-hand operation andor with supporting blood taking pen use to ensure blood sampling operation safety effectively.

This safe formula blood taking needle structure possesses easy cracked tie point, the portion of bending and buckle device through the setting, can once only accomplish the injection molding or mould plastics, reaches integrated into one piece. After the injection molding is finished, the product can be assembled only by simply bending and pressing.

The safe blood taking needle is externally provided with the percussion power, and the matched blood taking pen can be repeatedly used, so that the material is saved, the environmental protection requirement is met, and the economic burden of medical institutions and patients is obviously relieved.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of the overall structure of a first embodiment of the present invention;

FIG. 2 is a schematic view of the overall structure of a second embodiment of the present invention;

FIG. 3 is a schematic view of the overall structure of a third embodiment of the present invention;

FIG. 4 is a schematic diagram of a fabrication process of an embodiment of the present invention;

FIG. 5 is a schematic diagram of an outline structure of the embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 5, the invention relates to a safety blood taking needle structure, which comprises ashell 1, a needlebar fixing rod 2 positioned in theshell 1 and ablood taking needle 8 fixedly positioned on the needlebar fixing rod 2, wherein aneedle outlet 11 is formed in theshell 1, and a positioning block 4 for fixing the needlebar fixing rod 2 or a connection point with aneasy crack 12 is arranged between the needlebar fixing rod 2 and theshell 1; the bottom of theshell 1 is a needle seat, the tail end of the needlebar fixing rod 2 is fixed on the needle seat, abending opening 15 is arranged on the needle seat, and ashell fixing buckle 7 is arranged on the outer side of theshell 1 in an extending mode.

As a preferred embodiment of the invention, the bottom of theshell 1 is a needle seat, the tail end of the needlebar fixing rod 2 is fixed on the needle seat, and the needle seat is provided with a bending opening 15 with a thickness smaller than that of the adjacent part. As a preferred embodiment, thebending mouths 15 are provided at both sides of the needle holder, whereby the assembly can be facilitated. At least one bending opening 15 is arranged, and the bending opening can also be arranged at other parts on the shell.

The setting of thebending opening 15 can facilitate the structure of the blood taking needle to realize one-time injection molding or injection molding, and after the injection molding or injection molding is completed, the assembly of the safety blood taking needle product can be completed only by simply bending or pressing.

Thehousing fixing buckle 7 may be a locking hook and a locking groove which are mutually matched, and particularly, thehousing fixing buckle 7 is a bar-block-shaped locking barb and a bar-block-shaped locking groove which are mutually matched. Theshell fixing buckles 7 are preferably arranged in two groups in a bilateral symmetry mode. The setting of thefixed buckle 7 of casing can be when the blood taking needle structure is assembled, withcasing 1 zonulae occludens together, play fixedcasing 1, keep the effect thatcasing 1 is in airtight combination state. Thehousing fixation clasp 7 may also be placed inside thehousing 1, between thehousing 1 and the needle hub.

This safe formula blood taking needle structure fixesblood taking needle 8 incasing 1, can avoid the unreasonable exposure of blood taking needle when not using, trigger needle stickdead lever 2 through external force whenblood taking needle 8 uses, with needle stickdead lever 2 from the locating piece roll-off, and then promoteblood taking needle 8, perhaps makeeasy breach 12 break off, can promoteblood taking needle 8 and pass outneedle mouth 11 and take a blood sample, this safe formula blood taking needle cooperates different structures can reach the purpose of single-handed operation and/or use with supporting blood taking pen, can ensure the operation of safe blood taking effectively.

In a preferred embodiment of the present invention, thelancet 8 is a needle-shaped sharp object, and a sharp object having another shape such as a blade may be used.

As a preferred embodiment of the invention, the needlebar fixing rod 2 extends forwards and is provided with a needlepoint protection rod 23 wrapping the needle point.

In a preferred embodiment of the present invention, acleavage facilitating portion 24 is provided at the junction between the needlepointprotective rod 23 and theneedlepoint fixing rod 2.

The needle pointprotective rod 23 can prevent the needle point from being exposed outside before use and from rotating and falling off during use, so that the sterilization effect can be guaranteed. The needlepoint protection rod 23 can be conveniently rotated and dropped by arranging the easy-to-crackpart 24, and the needlepoint protection rod 23 is separated from the needlerod fixing rod 2.

In a preferred embodiment of the present invention, the needlebar fixing rod 2 is provided with alimiting device 21 extending outwards and located at two sides of the needlebar fixing rod 2, and a resetting device cooperating with thelimiting device 21 to reset the needlebar fixing rod 2 is provided in thehousing 1.

As a preferred embodiment of the invention, the maximum width of thelimiting device 21 is larger than the maximum width of the hole formed after the needle bar fixing rod falls off. Like this,stop device 21 both can control the length of pricking out ofblood taking needle 8 after triggering to guarantee thatblood taking needle 8 can rationally take a blood sample after pricking out, also can prevent thatblood taking needle 8 from deviating fromcasing 1 from the rear portion after the blood sampling is accomplished, and do not cause the injury to by blood sampling person, operator and waste recovery person.

Meanwhile, after the blood sampling is finished, the reset device is matched with thelimiting device 21, so that theblood sampling needle 8 can return to theshell 1, the trouble of cleaning and the injury to an operator and a patient are avoided.

In a preferred embodiment of the present invention, the restoring means is anelastic rod 3 formed by extending thehousing 1 inward and inclining toward the bottom of thehousing 1.

Under this kind of resetting means's the form that sets up, the in-process thatblood taking needle 8 pricked out,elastic rod 3 is compressed, pricks out the back of targetting in place atblood taking needle 8, andelastic rod 3 restores initial condition under its self elastic action, can realize the perfect ofblood taking needle 8 and reset.

The reset device is provided with various realization forms, accessories such as springs can be arranged on the needlebar fixing rod 2, and an independent reset part can be arranged in theshell 1 to realize the reset function of theblood taking needle 8.

As a preferred embodiment of the invention, theshell 1 is provided with a stop baffle extending from two sides of theneedle outlet 11, and the maximum width of the top end of the needlebar fixing rod 2 is larger than the maximum width of theneedle outlet 11.

The stop baffles are arranged on two sides of the needle outlet, the inner side of theshell 1 is a horizontal baffle, when the blood taking needle is launched to take blood, the blood taking needle is launched through theneedle outlet 11, the front end of the needlebar fixing rod 2 can be blocked by the stop baffles through the front end, and the needle head of theblood taking needle 8 is prevented from being excessively exposed.

The top end of the stop baffle and the needlebar fixing rod 2 can be a ring and a cylinder which are matched with each other and have different diameters, preferably, the inner diameter of theneedle outlet 11 is smaller than the outer diameter of the needlebar fixing rod 2, and at least one group of stop baffles is arranged.

The stop baffles are preferably a group, are arranged at the front parts of theshell 1 and the needlebar fixing rod 2 around theneedle outlet 11, can be arranged at any part of theshell 1 and the needlebar fixing rod 2, and can be various devices which are arranged between theshell 1 and the needlebar fixing rod 2 and can limit the displacement of the needle bar fixing rod by internal components and/or external components singly or in combination.

The arrangement of the stop baffle can well limit the maximum displacement of the needlebar fixing rod 2, control the puncture depth and prevent the needle head from being excessively exposed.

In a preferred embodiment of the present invention, a positioning block 4 for fixing the needlebar fixing rod 2 is provided between the needlebar fixing rod 2 and thehousing 1. The positioning block 4 may be a positioningprotrusion 41 and apositioning groove 42 which are matched with each other, and particularly, the positioning block 4 is a hemispherical protrusion and a hemispherical recess which are matched with each other. The positioning blocks 4 are preferably arranged in two groups which are arranged symmetrically left and right. The positioning block 4 can fix the needlebar fixing rod 2 and keep the needlebar fixing rod 2 in a state before being triggered when the needlebar fixing rod 2 is separated from theshell 1.

As a preferred embodiment of the present invention, thehousing 1 is provided with reset blocks 5 at both sides of the needlebar fixing lever 2, each reset block 5 is provided with an arc-shapedgroove 51, both sides of the needlebar fixing lever 2 are extended with a protrusion 52 capable of being inserted into the arc-shapedgroove 51 when the needlebar fixing lever 2 is reset, and the arc-shapedgroove 51 is provided with anotch 53 capable of guiding the protrusion 52 into the arc-shapedgroove 51.

Blood taking needle 8 resets under resetting means's effect, and setting up of reset block 5 can effectively reset spacingly to needle bardead lever 2 to prevent that needle bardead lever 2 from resetting excessively, at the in-process that resets of needle bardead lever 2, in the arch 52 of needle bardead lever 2 both sides can imbedarc recess 51, the reducible reset block 5 that sets up ofbreach 53 blocks the arch 52 of needle bardead lever 2 both sides, in order to make things convenient for arch 52 to slide inarc recess 51. The reset block 5 can also play a similar or positioning block-containing role when the needlebar fixing rod 2 is separated from theshell 1, namely, the needlebar fixing rod 2 is fixed, and the state of the needlebar fixing rod 2 before being fired is kept.

In a preferred embodiment of the present invention, a connection point having abreakable portion 12 is provided between the needle bar fixing lever and the housing. The arrangement of the connection point can enable the needle bar fixing rod and the shell to be manufactured integrally, and meanwhile, the needlebar fixing rod 2 is fixed to keep the state of the needlebar fixing rod 2 before being triggered. The easy-to-break 12 arranged on the connecting point can separate the needlebar fixing rod 2 from theshell 1 with little force to trigger the blood taking needle.

In a preferred embodiment of the present invention, the needlebar fixing rod 2 is provided with a reset clip 22 extending from the rear end thereof, the reset clip 22 is formed by twosymmetrical snap rods 221, and eachsnap rod 221 is provided with asnap 222 facing inward.

As a preferred embodiment of the invention, anextension arm 6 matched with the tail end of theshell 1 is arranged at the tail end of theshell 1 in an extending way, a loading position stop 61 is arranged in theextension arm 6, and at least one loading position stop 61 is arranged in theextension arm 6. In a preferred embodiment, eachextension arm 6 is provided with at least one pair of mutually symmetrical upper chamber screens 61.

In a preferred embodiment of the present invention, the bottom of theextension arm 6 is open, and acomposite locking device 62 for fixing with a composite locking hole of a lancet is provided at the rear end of theextension arm 6.

In a preferred embodiment of the present invention, thecomposite lock 62 is formed by two protrusions symmetrically disposed in theextension arm 6, each of the protrusions having one of a tapered shape, a semicircular shape, and a trapezoidal shape, and may have other shapes.

This safe formula blood taking needle structure can cooperate the blood sampling pen to use, and at this moment, the clamp that resets 22 that 2 tail ends of needle stick dead lever set up can be fixed with the cooperation of percussion hammer top on the blood sampling pen, accomplishes the blood sampling back through the blood sampling pen, at the in-process that the blood sampling pen was withdrawed, with the blood sampling pen on the percussion hammer top fixed complex needle stickdead lever 2 can withdraw under the effort at the blood sampling pen and reply.

In the process of matching the blood sampling pen, theloading clamping position 61 and thecomposite locking device 62 can be better fixedly connected with the blood sampling pen, so that a better connection effect is ensured.

Theextension arm 6 is internally provided with at least one, preferably two, strip-shaped block-shaped devices which are symmetrically arranged at two sides and transversely arranged and are matched with the loading device of a designated blood sampling pen for use. The combined type blood taking needle pushing device is used for pushing the composite slide bar to move backwards in the process of combining theblood taking needle 8 with a specified blood taking pen, and the purpose of loading is achieved. After the blood taking needle is combined with the appointed blood taking pen, the composite sliding rod is maintained at the corresponding position, and the loading state is kept. When in ejection, the combined slide bar pushes the loading push rod forwards away from the blood sampling pen under the thrust of the ejection spring. The loading screens 61 can also adopt a semicircular shape, a trapezoidal shape or other shapes, and the placing mode can also adopt other placing modes such as vertical placing, inclined placing, asymmetric placing and the like.

The safety blood taking needle is provided with acomposite locking device 62, at least one, preferably two groups of conical block-shaped devices are arranged in the safety blood taking needle, the conical block-shaped devices are vertically and horizontally symmetrically arranged on theextension arm 6 and are matched with a composite locking hole of a specified blood taking pen for use. When the combined type blood taking needle is combined with the composite locking hole, the combined type blood taking needle is used as a clamping mechanism to form inward pressure to tightly connect the blood taking needle and the pen body together. And the combined lock hole is matched with the composite lock hole, and the purposes of keeping the loading state and the ejection unloading state are achieved simultaneously after combination. And the lock is matched with the composite locking hole, so that the aim of keeping the ejection and unloading state after being fired is fulfilled. Thecomposite lock 62 may also be semi-circular, trapezoidal or other shapes, and may also be placed in other ways, such as vertically, diagonally, asymmetrically, etc.

As a preferred embodiment of the present invention, the rear end of the needlebar fixing rod 2 is provided with a firing bar extending backward. The blood sampling pen is preferably cylindrical, is convenient for a hand of a person to press and a percussion hammer of the blood sampling pen to fire, and can be in other shapes.

As a preferred embodiment of the present invention, the rear end of the needlebar fixing rod 2 is provided with a supporting plate extending outward. The optimal selection is arranged at two sides, which is convenient for an operator to use as a firing fulcrum during one-hand operation.

As a preferred embodiment of the invention, the upper end of theshell 1 is narrowed towards the top, and a needle bar fixing rod moving guide rail for guiding the needlebar fixing rod 2 to slide is also arranged in theshell 1.

This safe formula blood taking needle structure can realize the one hand to the percussion of blood taking needle through setting up firing bar and backup pad. Also can reach better blood sampling effect through setting upextension arm 6,compound locking ware 62 and thescreens 61 of going up the thorax with appointed blood sampling pen cooperation, more excellent can reach singlehanded, blood sampling pen both general.

In a preferred embodiment of the present invention, an outwardly extendable skin tensioner extends from the top end of thehousing 1.

The skin tensioner is positioned outside the top end of theshell 1, when the blood taking needle is used, the top end of theshell 1 is abutted against the skin of a human body, and the skin tensioner is pressed to deform and expand towards two sides, so that the skin of the blood taking part can be tightened. The arrangement of the skin tensioner can ensure that the needle point can penetrate into the tissues of the human body more smoothly, and the pain of the patient during acupuncture is relieved.

The device of the invention has the advantages of simple structure, few components, easy assembly, high reliability and safe use. Through the design of external power and the like, the material is saved, the working procedures are reduced, the production cost is reduced, and the economic burden of medical institutions and patients is obviously reduced.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (9)

1. A safe blood taking needle structure is characterized in that: the blood taking needle comprises a shell, a needle bar fixing rod and a blood taking needle, wherein the needle bar fixing rod is positioned in the shell, the blood taking needle is fixed on the needle bar fixing rod, a needle outlet is formed in the shell, and a positioning block for fixing the needle bar fixing rod or a connecting point with an easy crack is arranged between the needle bar fixing rod and the shell; the bottom of casing is the needle file, the tail end of needle stick dead lever is fixed on the needle file, be equipped with the mouth of bending on the needle file, be located the outside extension of casing is equipped with casing fixed buckle.

2. A safety lancet structure according to claim 1, wherein: the needle bar fixing rod extends outwards to be provided with limiting devices positioned on two sides of the needle bar fixing rod, and a reset device matched with the limiting devices to reset the needle bar fixing rod is arranged in the shell.

3. A safety lancet structure according to claim 2, wherein: the reset device is an elastic rod formed by extending the shell inwards and inclining towards the bottom of the shell.

4. A safety lancet structure according to claim 1, wherein: and stop baffles are arranged on the two sides of the needle outlet on the shell, and the maximum width of the top end of the needle bar fixing rod is greater than that of the needle outlet.

5. A safety lancet structure according to claim 1, wherein: the needle bar fixing rod is characterized in that a reset clamp is arranged at the tail end of the needle bar fixing rod in an extending mode, the reset clamp is clamping rods with two symmetrical sides, and each clamping rod is provided with a clamp buckle facing the inner side.

6. A safety lancet structure according to claim 1, wherein: the tail end of the needle bar fixing rod is provided with a firing rod extending backwards.

7. A safety lancet structure according to claim 1, wherein: the tail end of the needle bar fixing rod is provided with a supporting plate extending outwards.

8. A safety lancet structure according to claim 1, wherein: the upper end of the shell narrows to the top, and a needle bar fixing rod moving guide rail for guiding the needle bar fixing rod to slide is further arranged in the shell.

9. A safety lancet structure according to claim 1, wherein: the top end of the shell is extended with an outward extensible skin tensioner.

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