WO2016115941A1

WO2016115941A1 - Safe blood lancet structure

Info

Publication number: WO2016115941A1
Application number: PCT/CN2015/094498
Authority: WO
Inventors: 胡绍勤
Original assignee: 胡绍勤
Priority date: 2015-01-20
Filing date: 2015-11-12
Publication date: 2016-07-28
Also published as: CN107405119A; CN107405119B; CN112155563A; CN105640571B; CN205338962U; CN105640571A

Abstract

A safe blood lancet structure, comprising a housing (1), a lancet fixing rod (2) arranged within the housing (1), and a blood lancet (8) fixed at the top of the lancet fixing rod (2). A lancet outlet (11) is provided at the top of the housing (1). A positioning block (4) for fixing the lancet fixing rod (2) or a connecting point having an easily split opening (12) is arranged between the lancet fixing rod (2) and the housing (1). This safe blood lancet structure has the blood lancet (8) fixed within the housing (1) to prevent unreasonable exposure of the blood lancet (8) when not in use. When the blood lancet (8) is in use, the tail portion of the lancet fixing rod (2) is triggered by an external force to allow the lancet fixing rod (2) to slide out of the positioning block (4), thus pushing the blood lancet (8), or to allow the easily split opening (12) to be split, thus allowing the blood lancet (8) to be pushed through the lancet outlet (11) for blood sampling. This safe blood lancet structure is simple and inexpensive to manufacture, is capable of achieving, with different structures, the goals of one-handed operation and/or use with a supporting blood sampling stylus, is capable of effectively ensuring a safe blood sampling operation, and is used in the field of medical instruments.

Description

Safety type blood collection needle structure

Technical field

The invention relates to the field of medical instruments, and in particular to a safety type lancet structure.

Background technique

The current personal blood collection needles are all disposable. The simple one in the personal blood collection needle is a triangular iron piece or a fixed needle bar and a convenient needle bar fixing rod. There is no limit device, and the wound size caused by the patient is The depth is determined entirely by the proficiency and experience of the caregiver. The pain is strong, and some patients evade and give up the blood test because of fear, so that the clinician can not obtain the test results and only open the treatment plan based on personal experience, the rate of misdiagnosis is high, and the illness is delayed.

The personal blood collection needle is mostly a plastic film or a simple package with a cap. In the process of transporting, using, and discarding the blood collection needle, plastic film piercing or cap peeling may occur. The outer layer is not covered by the protective layer, and the needle is exposed. Or a third person, with strong pain, poor safety performance, and even blood-borne pollution.

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

Some personal blood collection needles can be used with the blood collection pen, but the individual blood collection needles need to be exposed during the installation and or disposal process. The exposure of the needle will accidentally injure the operator and the safety performance is poor. And the individual blood collection needle should be placed inside the blood collection pen. Some patients bring the blood into the blood collection pen due to the large amount of bleeding. The ejection and recovery parts of the blood collection pen cannot be replaced every time. It is also difficult to thoroughly clean the blood. A major hidden danger of pollution.

There are safe lancets on the market, which are equipped with limit devices and housing protection. Layer, the needle can be automatically retracted after firing, disposable, safe performance. However, due to its complicated structure, multiple components, complicated manufacturing process and high price, it is difficult to popularize the procurement and use costs of hospitals. Therefore, only some infectious disease prevention and treatment institutions or medical institutions with good economic conditions are in use.

Clinically, there is a need for a blood collection needle that is simple in structure, easy to manufacture, inexpensive, practical, and safe.

Summary of the invention

In order to solve the above problems, the present invention provides a safe blood collection needle structure which is simpler in structure, low in cost, and can effectively ensure safety.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A safety type blood collection needle structure comprises a housing, a needle bar fixing rod located in the housing and a blood collection needle fixed to the needle rod fixing rod, wherein the housing is provided with a needle outlet, the needle rod fixing rod A positioning block for fixing the needle bar fixing rod or a connection point having a frangible opening is provided between the housing and the housing.

Further, as an improvement of the technical solution of the present invention, the blood collection needle is a needle-like sharp object.

Further, as an improvement of the technical solution of the present invention, the needle bar fixing rod is extended forward with a needle tip protection rod.

Further, as an improvement of the technical solution of the present invention, the tip of the needle tip protection rod and the needle bar fixing rod are provided with a frangible portion.

Further, as an improvement of the technical solution of the present invention, the needle bar fixing rod extends outwardly and has a limiting device on both sides of the needle bar fixing rod, and the housing is provided with a reset device that cooperates with the limiting device to reset the needle bar fixing rod.

Further, as an improvement of the technical solution of the present invention, the resetting device is an elastic rod which is formed inwardly of the casing and inclined toward the bottom of the casing.

Further, as an improvement of the technical solution of the present invention, a cut-off baffle is disposed on both sides of the needle exit port on the housing, and a maximum width of the top end of the needle bar fixing rod is greater than a maximum width of the needle exit port.

Further, as an improvement of the technical solution of the present invention, a positioning block for fixing the needle bar fixing rod is disposed between the needle bar fixing rod and the housing.

Further, as an improvement of the technical solution of the present invention, a reset block is disposed on both sides of the needle rod fixing rod in the housing, and each of the reset blocks is provided with an arc-shaped groove, and both sides of the needle rod fixing rod are extended on the needle rod fixing rod At the time of resetting, the protrusion of the arcuate groove can be caught, and the arcuate groove is provided with a notch for guiding the protrusion into the arcuate groove.

Further, as an improvement of the technical solution of the present invention, a connection point having a frangible opening is provided between the needle bar fixing rod and the casing.

Further, as an improvement of the technical solution of the present invention, the rear end of the needle bar fixing rod extends with a reset clip, and the reset clip is a symmetrical snap lever on both sides, and each of the snap levers is provided with a buckle facing the inner side.

Further, as an improvement of the technical solution of the present invention, the bottom of the housing is a needle seat, and the tail end of the needle bar fixing rod is fixed on the needle seat, and the needle seat is provided with a bending opening.

Further, as an improvement of the technical solution of the present invention, an extension arm that matches the tail end of the housing extends at a tail end of the housing, and an upper jaw is provided in the extension arm, and at least one upper jaw is disposed in the extension arm.

Further, as an improvement of the technical solution of the present invention, the bottom opening of the extension arm is located at the tail end of the extension arm and is provided with a composite locker that is fixed with a composite locking hole on the blood collection pen.

Further as an improvement of the technical solution of the present invention, the composite locker is two bumps symmetrically disposed within the extension arm.

Further, as an improvement of the technical solution of the present invention, a housing fixing buckle is disposed on an outer side of the housing.

Further, as an improvement of the technical solution of the present invention, the tail end of the needle bar fixing rod is provided with a firing rod extending rearward.

Further, as an improvement of the technical solution of the present invention, the tail end of the needle bar fixing rod is provided with an outwardly extending support plate.

Further, as an improvement of the technical solution of the present invention, the upper end of the housing is narrowed toward the top, and the moving rod guide rod moving rod guiding the needle bar fixing rod is further disposed in the housing.

Further as an improvement of the technical solution of the present invention, the top end of the housing extends with a skin tensioner that can be expanded outward.

The beneficial effects of the invention: the safety type blood collection needle structure fixes the blood collection needle in the housing, which can avoid the unreasonable exposure of the blood collection needle when not in use, and the needle rod is fixed by the external force triggering the needle rod when the blood collection needle is used. When the rod slides out from the positioning block, and then pushes the blood collection needle, or the breakable opening is broken, the blood collection needle can be pushed through the needle outlet for blood collection. The safety type blood collection needle can be matched with different structures to achieve one-hand operation or matching The purpose of the blood collection pen is used, and the blood collection operation is effectively guaranteed.

The safety type lancet structure can be integrally molded by one-time injection molding or injection molding by providing a connection point, a bending portion and a snap device with a frangible opening. After the injection molding is completed, the assembly of the product can be completed simply by bending and pressing.

This safety type blood collection needle can be reused by externally applying the firing force. Thereby saving materials and meeting environmental protection requirements, and significantly reducing the economic burden of medical institutions and patients.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings:

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

Figure 2 is a schematic view showing the overall structure of a second embodiment of the present invention;

Figure 3 is a schematic view showing the overall structure of a third embodiment of the present invention;

4 is a schematic view showing a manufacturing process of an embodiment of the present invention;

Fig. 5 is a schematic view showing the structure of an exception of the embodiment of the present invention.

detailed description

1 to 5, the present invention is a safety type lancet structure comprising a housing 1, a needle bar fixing rod 2 located in the housing 1 and a blood collection needle 8 fixed to the needle bar fixing rod 2, The housing 1 is provided with a needle opening 11 between which a positioning block 4 for fixing the needle bar fixing rod 2 or a connection point having a frangible opening 12 is provided between the needle bar fixing rod 2 and the casing 1.

The safety type blood collection needle structure fixes the blood collection needle 8 in the housing 1 to avoid unreasonable exposure of the blood collection needle when not in use. When the blood collection needle 8 is used, the needle rod fixing rod 2 is triggered by an external force, and the needle rod fixing rod 2 is When the slide block is slid out, and then the blood collection needle 8 is pushed, or the easy-to-break port 12 is disconnected, the blood collection needle 8 can be pushed through the needle outlet 11 for blood collection. The safety type blood collection needle can cooperate with different structures to achieve one-hand operation and / or with the purpose of the matching blood collection pen, can effectively ensure the operation of safe blood collection.

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

As a preferred embodiment of the present invention, the needle bar fixing rod 2 is extended forward with a wrapping needle A pointed tip protects the stick 23.

As a preferred embodiment of the present invention, the junction of the needle tip protection bar 23 and the needle bar fixing rod 2 is provided with a frangible portion 24.

The needle tip protection rod 23 is arranged to prevent the needle tip from being exposed to the outside before use, and the rotation is detached during use, thereby ensuring the sterilization effect. The arrangement of the frangible portion 24 facilitates the rotation of the needle tip guard bar 23 to separate the needle tip guard bar 23 from the needle bar fixing bar 2.

As a preferred embodiment of the present invention, the needle bar fixing rod 2 extends outwardly and has a limiting device 21 on both sides of the needle bar fixing rod 2, and the housing 1 is provided with a matching limiting device 21 to reset the needle bar fixing rod 2 Reset device.

As a preferred embodiment of the present invention, the maximum width of the limiting device 21 is greater than the maximum width of the hole formed after the needle bar fixing rod is detached. In this way, the limiting device 21 can control the length of the lancet 8 after the triggering of the lancet 8, thereby ensuring that the lancet 8 can properly collect blood after puncturing, and also prevent the lancet 8 from coming out of the housing after the blood collection is completed. Without causing harm to blood collectors, operators and waste recyclers.

At the same time, after the blood collection is completed, the resetting device cooperates with the limiting device 21 to return the blood collecting needle 8 to the housing 1, avoiding the trouble of cleaning and the injury to the operator and the patient.

As a preferred embodiment of the present invention, the resetting means is an elastic rod 3 which is formed inwardly of the casing 1 and which is inclined toward the bottom of the casing 1.

In the setting form of the resetting device, during the process of puncturing the lancet 8, the elastic rod 3 is compressed, and after the lancet 8 is stabbed in place for blood collection, the elastic rod 3 returns to the initial state under its own elastic action, A perfect reset of the lancet 8 is achieved.

The setting of the reset device has various implementation forms, which can be set on the needle bar fixing rod 2 An auxiliary member such as a spring can also be provided with a separate reset member in the housing 1 to realize the reset function of the blood collection needle 8.

As a preferred embodiment of the present invention, the housing 1 has a cut-off baffle extending on both sides of the needle-out port 11, and the maximum width of the tip end of the needle bar fixing rod 2 is larger than the maximum width of the needle-out port 11.

The cut-off baffle is a baffle disposed on both sides of the needle-out port and horizontal on the inner side of the casing 1. When the blood-collecting needle is launched by the blood-collecting needle to collect blood, the blood-collecting needle passes through the needle-out port 11 and can pass through the cut-off block. The plate blocks the front end of the needle bar fixing rod 2 to prevent the needle of the blood collection needle 8 from being exposed too much.

The top end of the cut-off baffle and the needle bar fixing rod 2 may be rings and cylinders of different diameters that cooperate with each other. Preferably, the inner diameter of the needle-out port 11 is smaller than the outer diameter of the needle bar fixing rod 2, and the cut-off baffle is provided with at least one set.

The cut-off baffle is preferably a set, and is disposed at the front of the housing 1 and the needle bar fixing rod 2 at the periphery of the needle exit 11, and may be disposed at any position on the housing 1, the needle bar fixing rod 2, or may be internal. The components and or peripheral components are provided, individually or in combination, between the housing 1 and the needle bar fixing rod 2 for various means for limiting the displacement of the needle bar fixing rod.

The setting of the stop baffle can well define the maximum displacement of the needle bar fixing rod 2, control the puncture depth, and prevent the needle from being excessively exposed.

As a preferred embodiment of the present invention, a positioning block 4 for fixing the needle bar fixing rod 2 is provided between the needle bar fixing rod 2 and the casing 1. The positioning block 4 may be a matching positioning protrusion 41 and a positioning groove 42. In particular, the positioning block 4 is a hemispherical protrusion and a hemispherical recess that cooperate with each other. The positioning blocks 4 are preferably two sets, arranged symmetrically left and right. The setting of the positioning block 4 can be When the needle bar fixing rod 2 is separated from the casing 1, the needle bar fixing rod 2 is fixed to maintain the needle bar fixing rod 2 in the state before the firing.

As a preferred embodiment of the present invention, the housing 1 is provided with a reset block 5 on both sides of the needle bar fixing rod 2, and each of the reset blocks 5 is provided with an arcuate groove 51, and both sides of the needle bar fixing rod 2 are extended. There is a projection 52 which can be engaged with the arcuate groove 51 when the needle bar fixing rod 2 is reset, and the arcuate groove 51 is provided with a notch 53 which can guide the projection 52 into the arcuate groove 51.

The lancet 8 is reset by the action of the resetting device, and the setting of the reset block 5 can effectively reset the needle bar fixing rod 2 to prevent the needle bar fixing rod 2 from being over-reset, during the resetting process of the needle bar fixing rod 2. The protrusions 52 on both sides of the needle bar fixing rod 2 can be embedded in the arcuate groove 51. The arrangement of the notch 53 can reduce the blocking of the protrusion 52 on both sides of the needle bar fixing rod 2 by the reset block 5 to facilitate the protrusion 52. Slide into the arcuate groove 51. The setting of the reset block 5 can also function similarly or include a positioning block when the needle bar fixing rod 2 is separated from the housing 1, that is, the needle bar fixing rod 2 is fixed, and the needle bar fixing rod 2 is held before the firing. The role of the state.

In a preferred embodiment of the present invention, a connection point having a frangible opening 12 is provided between the needle bar fixing rod and the casing. The connection point is set so that the needle bar fixing rod is integrally formed with the housing, and the needle bar fixing rod 2 is fixed, and the needle bar fixing rod 2 is maintained in the state before the firing. The easy-to-break port 12 is provided at the connection point to separate the needle bar fixing rod 2 from the housing 1 with little force during use, triggering the blood collection needle.

As a preferred embodiment of the present invention, the rear end of the needle bar fixing rod 2 is extended with a resetting clip 22, and the resetting clip 22 is a symmetrical locking rod 221, and each of the locking rods 221 is provided with a buckle 222 facing the inner side. .

As a preferred embodiment of the present invention, the bottom of the housing 1 is a needle holder, and the tail end of the needle bar fixing rod 2 is fixed on the needle seat, and the needle seat is provided with a bending opening 15 which is thinner than the adjacent portion. As a preferred embodiment, the bend openings 15 are provided on both sides of the needle hub, thereby making assembly easier. The bending opening 15 is provided at least one, and may be disposed at other parts of the casing.

The setting of the bending port 15 can facilitate the injection molding or injection molding of the lancet structure in one time. After the injection molding or the injection molding is completed, the assembly of the safety lancet product can be completed simply by bending or pressing.

As a preferred embodiment of the present invention, an extension arm 6 is formed at the rear end of the housing 1 to match the tail end of the housing 1. The extension arm 6 is provided with an upper cassette 61, and at least one of the extension arms 6 is provided. Captain card position 61. In a preferred embodiment, at least one pair of mutually symmetric upper jaws 61 are provided in each of the extension arms 6.

As a preferred embodiment of the present invention, the bottom of the extension arm 6 is open, and the composite end of the extension arm 6 is provided with a composite lock 62 that is fixed to the composite locking hole on the blood collection pen.

As a preferred embodiment of the present invention, the composite lock 62 is two protrusions symmetrically disposed in the extension arm 6. Each of the protrusions is one of a tapered shape, a semicircular shape, and a trapezoidal shape, and may be other shapes.

The safety type blood collection needle structure can be used with the blood collection pen. At this time, the reset clip 22 provided at the end of the needle rod fixing rod 2 can be fixed with the top end of the hammer on the blood collection pen, and after blood collection by the blood collection pen, blood collection is performed. In the process of retracting the pen, the needle bar fixing rod 2 fixedly matched with the top end of the hammer on the blood collection pen can be recovered under the retracting force of the blood collection pen.

In the process of using the blood collection pen, the upper jaw card 61 and the composite locker 62 can better achieve a fixed connection with the blood collection pen to ensure a better connection effect.

The extension arm 6 is provided with an upper jaw position 61, at least one, preferably two, symmetrically placed on both sides, and is a horizontally elongated block-like device for use with the upper jaw device of the designated blood collection pen. In the process of combining the blood collection needle 8 with the designated blood collection pen, the composite sliding rod is pushed backward to achieve the purpose of the upper jaw. After the combination of the blood collection needle and the designated blood collection pen, the composite slide rod is maintained at the corresponding position to maintain the upper jaw state. The composite slide bar is pushed forward from the blood collection pen by the composite slide bar under the thrust of the spring-loading spring during the unloading. The upper card position 61 can also adopt a semi-circular shape, a trapezoidal shape or the like, and the placement manner can also adopt other placement methods such as vertical placement, oblique placement, and asymmetric placement.

The safety type blood collection needle is provided with a composite locker 62, at least one, preferably two sets of tapered block-like devices are arranged on the extension arm 6 in a vertical manner, and are placed symmetrically with the composite locking hole of the designated blood collection pen. . When combined with the composite locking hole, as a clamping mechanism, an inward pressure is formed to tightly connect the blood collection needle to the pen body. Cooperating with the composite locking hole, the purpose of maintaining the upper jaw state and the unloading state is achieved simultaneously after the combination. Cooperate with the composite locking hole to achieve the purpose of maintaining the unloading state after firing. The composite lock 62 can also be semi-circular, trapezoidal or other shapes, and the placement manner can also be other vertical placement, oblique placement, asymmetric placement, and the like.

As a preferred embodiment of the invention, a housing fixing buckle 7 is provided on the outer side of the housing 1. The housing fixing clips 7 can be interlocking latching hooks and latching slots. In particular, the housing fixing clips 7 are interfitting strip-shaped latching barbs and strip-shaped latching recesses. The housing fixing buckles 7 are preferably two sets, and are disposed symmetrically left and right. When the housing fixing clips 7 are arranged to be assembled by the lancet structure, the housings 1 are tightly coupled together to fix the housing 1 and keep the housing 1 in a closed state. Housing fixing buckle 7 also It can be placed inside the casing 1 between the casing 1 and the hub.

As a preferred embodiment of the present invention, the tail end of the needle bar fixing rod 2 is provided with a firing rod extending rearward. It is preferably cylindrical, which is convenient for manual pressing and the lancet to fire the hammer, or other shapes.

As a preferred embodiment of the present invention, the tail end of the needle bar fixing rod 2 is provided with an outwardly extending support plate. It is preferably arranged on both sides to facilitate the operator as a firing fulcrum when operating with one hand.

As a preferred embodiment of the present invention, the upper end of the casing 1 is narrowed toward the top, and the casing 1 is further provided with a needle bar fixing rod moving guide for guiding the needle bar fixing rod 2 to slide.

The safety type lancet structure can realize the firing of the lancet with one hand by setting the firing rod and the support plate. It is also possible to achieve better blood collection effect by setting the extension arm 6, the composite locker 62 and the upper jaw card 61, and it is better to achieve both the one-handed and the blood-collecting pen.

As a preferred embodiment of the present invention, the top end of the housing 1 is extended with a skin tensioner that can be expanded outward.

The skin tensioner is located outside the top end of the housing 1. When the blood collection needle is used, the top end of the housing 1 is placed against the human skin, and the skin tensioner is deformed and expanded toward both sides to stretch the skin of the blood collection site. The skin tensioner is set to allow the needle tip to puncture into the human tissue more smoothly, reducing the pain of the patient during acupuncture.

The device of the invention has the advantages of simple structure, few components, easy assembly, high reliability and safe use. By designing external power and other materials to save materials and reduce processes, the production cost is reduced, and the economic burden on medical institutions and patients is significantly reduced.

Of course, the invention is not limited to the above embodiments, and is familiar with the technology in the field. Equivalent variations or substitutions may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

A safety type lancet structure, comprising: a housing, a needle bar fixing rod located in the housing, and a blood collection needle fixed to the needle rod fixing rod, wherein the housing is provided with a needle outlet, A positioning block for fixing the needle bar fixing rod or a connection point with a fragile opening is provided between the needle bar fixing rod and the casing.
The safety type lancet structure according to claim 1, wherein the needle bar fixing rod extends outwardly and is provided with a limiting device on both sides of the needle bar fixing rod, and the housing is provided with a matching limiting device. A reset device that resets the needle bar fixing rod.
The safety lancet structure according to claim 2, wherein the resetting means is an elastic rod extending inwardly of the housing and inclined toward the bottom of the housing.
The safety type lancet structure according to claim 1, wherein the casing is provided with a cut-off baffle on both sides of the needle exit port, and the maximum width of the top end of the needle bar fixing rod is larger than the maximum of the needle exit port. width.
The safety type lancet structure according to claim 1, wherein the housing is provided with a reset block on both sides of the needle bar fixing rod, and each of the reset blocks is provided with an arcuate groove, the needle Both sides of the rod fixing rod extend with protrusions that can be caught in the arcuate grooves when the needle bar fixing rod is reset, and the arcuate grooves are provided with notches that can guide the protrusions into the arcuate grooves.
The safety type lancet structure according to claim 1, wherein a rear end of the needle bar fixing rod extends with a reset clip, and the reset clip is a bilaterally symmetrical snap lever, and each of the buckles The rod is provided with a buckle facing inward.
A safety lancet structure according to claim 1 wherein: The bottom of the housing is a needle seat, and the tail end of the needle bar fixing rod is fixed on the needle seat, and the needle seat is provided with a bending opening.
The safety type lancet structure according to claim 1, wherein an extension arm that matches the tail end of the housing extends at a rear end of the housing, and an upper jaw is provided in the extension arm. At least one upper jaw is provided in the extension arm.
The safety type lancet structure according to claim 8, wherein the bottom end of the extension arm is open at a rear end of the extension arm, and a composite locker is provided for fixing the composite locking hole on the blood collection pen.
The safety lancet structure of claim 9 wherein said composite lock is two projections disposed symmetrically within the extension arm.
The safety lancet structure according to claim 1, wherein a housing fixing buckle is disposed on an outer side of the housing.
The safety lancet structure according to claim 1, wherein the tail end of the needle bar fixing rod is provided with a firing rod extending rearward.
The safety lancet structure according to claim 1, wherein the tail end of the needle bar fixing rod is provided with an outwardly extending support plate.
The safety type lancet structure according to claim 1, wherein the upper end of the housing is narrowed toward the top, and the housing is further provided with a needle bar fixing rod moving guide guiding the needle bar fixing rod to slide.
The safety lancet structure according to claim 1, wherein the top end of the housing extends with a skin tensioner that can be expanded outward.