CN107049335B

CN107049335B - Disposable hemostix

Info

Publication number: CN107049335B
Application number: CN201710195987.0A
Authority: CN
Inventors: 施国平; 安东尼·斯科特·霍斯特曼
Original assignee: Sterilance Medical Suzhou Inc
Current assignee: Sterilance Medical Suzhou Inc
Priority date: 2017-03-29
Filing date: 2017-03-29
Publication date: 2023-08-22
Anticipated expiration: 2037-03-29
Also published as: CN107049335A

Abstract

The utility model provides a novel disposable hemostix, includes shell, nook closing member, spring and pushes away hair ware, its characterized in that: the tail part of the hair pusher is provided with at least two elastic pins in a backward extending way, and the elastic pins are provided with a clamping hook, a first bending point and a second bending point; the shell is provided with an inclined plane and a blocking surface, all elastic pins form an elastic clamp together, and the needle core is clamped and positioned in the elastic clamp; when the device is used, the head of the hemostix is pressed, the ejector moves backwards, the elastic pin, the inclined surface and the blocking surface are hit to enable the first bending point to arch outwards and deform laterally, and when the first bending point is arched to reach the critical point of unhooking of the clamping hook and the clamping surface, the needle core emits puncture under the action of the spring. The scheme breaks through the working mode that the original inclined plane forces the tail end of the elastic clamp to open, creates a mode that the inclined plane forces the tail end of the elastic clamp to fold inwards firstly, and then the middle part of the elastic clamp arches outwards under the axial jacking action of the blocking surface.

Description

Disposable hemostix

Technical Field

The utility model relates to the field of medical blood sampling devices, in particular to a head pressing type disposable safety hemostix (or called blood taking needle) with an ejection mechanism. The hemostix has the advantages of simple structure, reliable work, low product price and market competition potential as a disposable product.

Background

In the field of medical blood sampling, the disposable hemostix is popular with medical staff and patients due to the characteristics of small volume, safe use and convenient operation, and is widely used in various medical institutions and diabetics at present. The hemostix is provided with the ejection mechanism, has compact structure and is integrally disposable, safe and convenient, and therefore, has strong market development potential.

Chinese patent CN2619583Y issued a patent entitled "self-locking disposable safety automatic blood taking needle". This patent presents a representative conventional cap-type head-pressing disposable hemostix. The structure of the hair-pushing device consists of six parts, namely a shell, an end cover, a needle core, a spring, a hair-pushing device and a cap. Under the assembled state, the cap is sleeved on the head of the hemostix, the end cover is provided with a pair of elastic claws, the elastic claws clamp the side ears on two sides of the needle core by using the clamping hooks and clamping force, the spring is propped between the end cover and the needle core, and when the head of the hemostix is pressed, the ejector moves backwards to hit the two elastic claws through the inclined plane and forces the elastic claws to open, so that the needle core is triggered to unhook and shooting puncture is generated under the pushing of the spring.

Chinese patent CN205107692U announces that a patent of the utility model named "improved head-pressing disposable hemostix" is entitled. Fig. 1 to 4 of the patent show a typical conventional twist-cap type head-push type disposable hemostix. The basic structure and working principle are similar to those of the above-mentioned Chinese patent CN2619583Y, except that: the head of the hemostix adopts the structure form of the twisting cap, when in use, the twisting cap is twisted firstly, so that the neck between the needle core and the protection rod is broken, and then the protection rod and the twisting cap are pulled out.

Along with the development of the market, the medical disposable hemostix has various products, but from the general development trend, the acceptance of the market has become completely oriented to low price, simple structure and reliable work. The two types of head pressing type disposable hemostix consists of five to six parts, and has relatively large number of parts, relatively complex structure and relatively high manufacturing cost. Therefore, on the basis of the method, the number of parts is reduced, the manufacturing cost is reduced, the structural design is simplified, the reliability of the product is improved, and the enhancement of the user experience is the future development direction of the product.

Disclosure of Invention

In view of the shortcomings of the prior art, the utility model provides a novel disposable hemostix, and aims to solve the problems of more parts, complex structure and high cost of the hemostix.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a novel disposable hemostix comprises a shell, a needle core, a spring and a hair pushing device.

In the assembled state before the emission, the needle core is positioned in the shell by the clamp, the spring is propped against the needle core, the elastic force of the spring acts on the ejection direction of the needle core, the head of the hair pusher extends out from the front end of the shell, and the body of the hair pusher is connected in the shell in a sliding way.

The innovation is that: the tail part of the hair pusher is provided with at least two elastic pins in a backward extending way, the elastic pins are of an elastic cantilever structure, and the tail end of the cantilever is an acting end; the elastic pin is provided with a clamping hook for locking the needle core; the elastic pin is provided with a first bending point and a second bending point at intervals along the length direction of the elastic pin, and the first bending point and the second bending point are fatigue points at which stress concentration occurs on the elastic pin during bending; taking the action end as a reference, wherein the distance from the second bending point to the action end is greater than the distance from the first bending point to the action end; the clamping hook is positioned near the first bending point in the length direction of the elastic pin.

An inclined plane is arranged in the shell corresponding to the action end of the elastic pin, and a blocking surface is arranged on the inclined plane; the inclined direction of the inclined plane can force a section of elastic pin from the acting end to the first bending point to bend towards the center of the cross section of the hemostix when the acting end of the elastic pin is hit.

And a clamping surface is arranged on the needle core corresponding to the clamping hook, and the clamping surface is matched with the clamping hook to lock the needle core.

In the assembly state before emission, all elastic pins jointly form an elastic clamp, the needle core is clamped and positioned in the elastic clamp, wherein a clamping hook on the elastic pin is matched with a clamping surface on the needle core, so that the needle core is in a locking state; the elastic pin is arranged in front of the inclined plane, wherein the action end of the elastic pin is arranged in front of the inclined plane in a face-to-face mode.

When the hair pusher head is pressed in a use state, the hair pusher moves backwards relative to the shell, the inclined planes in the shell correspondingly strike the action ends of the elastic pins and force one section of the action ends of all the elastic pins to the first bending points to bend towards the center of the cross section of the blood collector, meanwhile, the action ends of the elastic pins slide along the inclined planes to the blocking surface and then are blocked, at the moment, the blocking surface resists the elastic pins to generate a jacking action, and finally, all the elastic pins are forced to bend or bend at the first bending points and the second bending points, so that the first bending points of the elastic pins arch outwards and deform laterally, and the needle core emits puncture under the action of a spring after all the elastic pins arch to the unhooking critical points of the clamping hooks and the clamping surfaces.

The relevant contents and changes of the technical scheme are explained as follows:

1. in the above scheme, the shell, the needle core, the spring and the hair pushing device are basic structures of the head pressing type disposable blood taking device, and the basic functions and actions of the head pressing type disposable blood taking device are all the prior art, and can be seen in technical contents cited in the background art of the utility model.

2. In the above embodiments, the "front" of the "front", "front" and "forward" means the direction in which the needle tip of the hemostix is pointed. The "rear" in the "rearward" refers to the opposite direction of the "front". The "hair pusher head" refers to the forward end of the hair pusher, and the "hair pusher tail" refers to the rearward end of the hair pusher.

3. In the above-mentioned scheme, the "inclined plane" includes plane, cambered surface or conical surface, but nevertheless all set up with respect to the axis of the hemostix slope to form the inclined plane. In other words, the inclined surface has four types of an inclined surface in a planar form, an inclined surface in a concave form (the inclined surface is constituted by a plurality of straight lines in an inclined direction, and a concave or convex surface is formed in a vertical inclined direction, but is also an inclined surface in essence), an inclined surface in a conical form, and an inclined surface in an arc form (the inclined surface is constituted by at least one concave arc or/and convex arc in an inclined direction, but is also an inclined surface in essence). Any one of the present utility model is applicable, and may be specifically determined according to the actual situation. Wherein the first is a bevel in planar form; the second is a bevel in the form of a concave surface; the third is an inclined plane in the form of a conical surface; the fourth is an inclined surface in the form of an arc surface.

4. The utility model relates to a head pressing type disposable hemostix which comprises a twisting cap type structure and a cap type structure. Namely, the disposable hemostix of the utility model is usually provided with a protective cap, and the structural form of the protective cap can be a twist cap type or a cap type. This does not affect the achievement of the object of the present utility model.

The design principle and the conception of the utility model are as follows: in order to simplify the structure and reduce the cost, the utility model makes the following changes on the basis of the prior art: first, combine original outer cover and end cover into an organic whole, namely combine original outer cover and end cover two pieces of structural component into a structural component; secondly, an elastic clamp (used for locking the needle core) originally arranged on the shell or the end cover is arranged at the tail part of the hair pusher; thirdly, changing the inclined plane originally arranged on the hair pusher to be arranged on the shell; fourthly, a blocking surface is arranged on the improved inclined surface, wherein the blocking surface plays a role in jacking the tail end of the elastic clamp; fifthly, the end of the elastic clamp is forced to be opened outwards by the original inclined plane so as to unlock the needle core, the end of the elastic clamp is forced to be closed inwards by the inclined plane, and then the middle part of the elastic clamp is arched under the axial jacking action of the blocking surface so as to unlock the needle core.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages and effects:

1. the utility model only needs three structural components of the shell, the needle core and the hair pushing device except the spring, and the three structural components are easy to be injection molded by a mould, compared with the prior art, at least one structural component is omitted. From the perspective of mass production, the structure is simplified, and the manufacturing cost can be further reduced.

2. The utility model breaks through the mode that the tail end of the elastic claw is forced to open outwards by the inclined plane to unlock the needle core, and establishes the mode that the tail end of the elastic clamp is forced to close inwards by the inclined plane, and then the middle part of the elastic clamp is arched under the axial jacking action of the blocking surface to unlock the needle core. Because the innovation enables the elastic clamp to be arranged on the hair pushing device, the internal structure of the shell is greatly simplified, and the hair pushing device can be realized by adopting integral injection molding without adopting a split splicing structure.

3. The inclined plane in the utility model is essentially different from the inclined plane in the prior art: firstly, the inclined planes in the prior art are all arranged on the hair pushing device, and the inclined planes in the utility model are arranged on the shell; secondly, in the prior art, the inclined plane is not provided with a blocking surface, and in the utility model, the inclined plane is provided with a blocking surface; thirdly, the inclined direction of the inclined plane forces the elastic clamp to open outwards in the prior art, while the inclined direction of the inclined plane forces the tail end of the elastic clamp to fold inwards, then the middle part of the elastic clamp is outwards arched under the axial jacking action of the blocking surface, and when the middle part of the elastic clamp is outwards arched and expanded to the unhooking critical point of the clamping hook and the clamping surface, the needle core emits puncture under the action of the spring.

4. The utility model reasonably utilizes the mode that the tail end of the elastic clamp is folded inwards under the action of the inclined plane, then the middle part of the elastic clamp is outwards arched under the action of the axial jacking of the blocking surface to realize the unlocking of the needle core, has smart technical conception, reliable work and light hand feeling during operation, breaks through the working mode that the tail end of the elastic clamp is forced to open by the inclined plane in the prior art, and creates the mode that the tail end of the elastic clamp is forced to fold inwards by the inclined plane firstly, and then the middle part of the elastic clamp is outwards arched under the action of the axial jacking of the blocking surface (see fig. 18, 19 and 20), thereby having outstanding substantive characteristics and remarkable progress.

Drawings

FIG. 1 is a perspective view of embodiment 1 of the present utility model;

FIG. 2 is an exploded perspective view of embodiment 1 of the present utility model;

FIG. 3 is a perspective view of the first view of the core and twist cap of example 1 of the present utility model;

FIG. 4 is a second perspective view of the core and twist cap of example 1 of the present utility model;

FIG. 5 is a perspective view of the ejector according to embodiment 1 of the present utility model at a first viewing angle;

FIG. 6 is a perspective view of the ejector of embodiment 1 in a second perspective view;

FIG. 7 is a perspective view of the first perspective of the housing of embodiment 1 of the present utility model;

fig. 8 is a second perspective view of the housing of embodiment 1 of the present utility model;

FIG. 9 is a partially cut-away perspective view of the housing of embodiment 1 of the present utility model;

fig. 10 is a sectional view showing an initial assembly state of embodiment 1 of the present utility model;

FIG. 11 is a partial cutaway perspective view of the FIG. 10 condition;

FIG. 12 is a partial cross-sectional view of the state of FIG. 10;

FIG. 13 is a sectional view showing a state in which a hair pusher is pressed after removing a cap according to embodiment 1 of the present utility model;

FIG. 14 is a partial cutaway perspective view of the FIG. 13 condition;

FIG. 15 is a partial cross-sectional view of the state of FIG. 13;

FIG. 16 is a sectional view showing the unhooked state of the needle core according to embodiment 1 of the present utility model;

FIG. 17 is a sectional view showing a state after emission in embodiment 1 of the present utility model;

FIG. 18 is a schematic view of the core unhooking of the present utility model;

FIG. 19 is a schematic diagram B of the present utility model;

FIG. 20 is a schematic view C of the present utility model;

FIG. 21 is a perspective view of embodiment 2 of the present utility model;

FIG. 22 is an exploded perspective view of embodiment 2 of the present utility model;

fig. 23 is a sectional view showing an initial assembly state of embodiment 2 of the present utility model;

fig. 24 is an exploded perspective view of the adjusting head according to embodiment 2 of the present utility model.

The reference numerals in the above figures are explained as follows:

1. a housing; 2. a needle core; 3. a spring; 4. a hair pusher; 5. an elastic pin; 6. a clamping hook; 7. a first bending point; 8. a clamping surface; 9. a second bending point; 10. an inclined plane; 11. twisting the cap; 12. a hook; 13. a shoulder; 14. an inner end surface; 15. adjusting the head; 16. a blocking surface; 17. an action end; s, offset distance.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and examples:

example 1: novel disposable hemostix (twist cap type head press type disposable hemostix)

As shown in fig. 1 to 12, the disposable blood collector is composed of a housing 1, a twist cap 11, a needle core 2, a spring 3 and a hair pusher 4 (see fig. 1 and 2). The needle core 2 and the twist cap 11 are integrally injection molded (see fig. 3 and 4) and can be calculated as a single component.

In the assembled state before the firing (see fig. 10), the needle core 2 is clamped and positioned in the shell 1, the spring 3 is propped against the needle core 2, the elastic force of the spring 3 acts on the ejection direction of the needle core 2, the front part of the needle core 2 is provided with an integrally formed twisting cap 11, the head part of the hair pusher 4 extends out of the front end of the shell 1, and the body of the hair pusher 4 is slidingly connected in the shell 1.

The above matters in this embodiment are all in the prior art, and the innovation of the present utility model is that: four elastic pins 5 (see fig. 5 and 6) are arranged at the tail of the hair pusher 4 in a backward extending mode, the elastic pins 5 are of an elastic cantilever structure, and the tail end of the cantilever is an acting end 17. In the four elastic pins 5, the root parts of every two elastic pins 5 are of a connected structure, and the inner side surfaces of the elastic pins 5 are provided with hooks 6 for locking the needle core 2. In the present embodiment, the two elastic pins 5 share one hook 6 (see fig. 5 and 6). The elastic pin 5 is provided with a first bending point 7 and a second bending point 9 at intervals along the length direction, and the first bending point 7 and the second bending point 9 are fatigue points which are easy to generate stress concentration on the elastic pin 5 during bending. The distance from the second bending point 9 to the active end 17 is greater than the distance from the first bending point 7 to the active end 17, based on the active end 17. The clamping hook 6 is positioned near the first bending point 7 in the length direction of the elastic pin (5). In this embodiment, the hook 6 is located between the first bend 7 and the second bend point 9 and is located close to the first bend point 7 (see fig. 18, 19 and 20).

A bevel 10 (see fig. 7, 9 and 10) is provided in the housing 1 in correspondence of the active end 17 of the spring pin 5, the bevel 10 being provided with a blocking surface 16. The inclined surface 10 is inclined in such a way that, when the action end 17 of the elastic leg 5 is hit, a section of the elastic leg 5 from the action end 17 to the first bending point 7 is forced to bend toward the center of the cross section of the blood collector (see fig. 18, 19 and 20). In fig. 20, S denotes a biasing distance between the elastic pin 5 and the blocking surface 16, and the magnitude, cross-sectional shape, cross-sectional area, and elasticity of the material affect the axial pushing feel.

Corresponding to the clamping hook 6, an engaging surface 8 is arranged on the needle core 2 (see fig. 3 and 4), and the engaging surface 8 is matched with the clamping hook 6 to lock the needle core 2 (see fig. 10).

The side part of the hair pusher 4 is provided with a hook 12 and a shoulder 13 (see fig. 5 and 6), an inner end surface 14 (see fig. 10) is arranged on the inner wall of the shell 1 corresponding to the hook 12 and the shoulder 13, and the hook 12 on the hair pusher 4 and the inner end surface 14 cooperate to form a first limit to prevent the hair pusher 4 from moving forwards relative to the shell 1 in the assembled state before being emitted.

The action process when the embodiment is used is as follows:

(1) Initial assembled state

As shown in fig. 10, 11 and 12, the whole hemostix is composed of a housing 1, a twisting cap 11, a needle core 2, a spring 3 and a hair pusher 4, wherein the spring 3 is in a pre-pressing state, all elastic pins 5 jointly form an elastic clamp in a pre-emission assembly state, the needle core 2 is clamped and positioned in the elastic clamp, and a clamping hook 6 on the elastic pins 5 is matched with a clamping surface 8 on the needle core 2, so that the needle core 2 is in a locking state. The spring pin 5 is arranged in front of the inclined plane 10, wherein the active end 17 of the spring pin 5 is arranged in front of the inclined plane 10. The hooks 12 on the hair pusher 4 cooperate with the inner end surface 14 to form a first limit to prevent the hair pusher 4 from moving forward relative to the housing 1.

(2) After removing the needle cap, pressing the hair pusher

As shown in fig. 13, 14 and 15, the lancet enclosure 1 is held in one hand, and the torsion cap 11 is twisted and removed in the other hand. Then, the hand-held housing 1 presses the head of the blood collection device against the blood collection site, and when the head of the ejector 4 is pressed, the ejector 5 moves backward with respect to the housing 1.

(3) Unhooking state of needle core

As shown in fig. 16, 18, 19 and 20, as the ejector 5 continues to move backwards, the inclined surface 10 in the housing 1 correspondingly hits the acting end 17 of each elastic pin 5 and forces one section from the acting end 17 of each elastic pin 5 to the first bending point 7 to bend towards the center of the cross section of the hemostix, meanwhile, the acting end 17 of each elastic pin 5 slides along the inclined surface 10 to the blocking surface 16 to block, at the moment, the blocking surface 16 presses the elastic pins 5, and finally forces all the elastic pins 5 to bend or bend at the first bending point 7 and the second bending point 9 (see fig. 18, 19 and 20), so that the first bending point 7 of each elastic pin 5 is arched outwards to deform laterally, and when all the elastic pins 5 arch to the critical point of unhooking between the hooks 6 and the clamping surfaces 8, the needle core 2 is shot under the action of the spring 3.

(4) Post-emission state

As shown in fig. 17, the needle core 2 is in a piercing state and then retracted into the housing 1. The shoulder 13 on the hair pusher 4 cooperates with the inner end surface 14 to form a second limit to prevent the hair pusher 4 from retreating relative to the housing 1, so that the head of the hair pusher 4 is in a flush or retracted state relative to the head of the housing 1.

Example 2: novel disposable hemostix with adjusting head structure (twist cap type head press type disposable hemostix with adjusting head)

As shown in fig. 21 to 24, the blood collector is composed of a housing 1, an adjusting head 15, a twist cap 11, a needle core 2, a spring 3, and a hair pusher 4 (see fig. 21 and 22).

This embodiment differs from embodiment 1 in that: the head of the shell 1 is provided with an adjusting head 15 structure capable of changing the puncture depth. The adjusting head 15 capable of changing the puncture depth may be in the prior art, for example, in the structure disclosed in chinese patent application with application number 201610158481.8 and publication number CN105816188a, entitled "improved disposable adjustable puncture depth safety blood taking needle", or in the structure disclosed in chinese patent with patent number 201620212700.1, entitled "improved disposable adjustable puncture depth safety blood taking needle", entitled "CN 205586011U, and not described in detail herein.

Other matters are the same as those of embodiment 1, and a description thereof will not be repeated here.

Other embodiments and variations of the present utility model are described below:

1. although the above embodiment 1 is given as a twist-cap type head-push type disposable blood collector, the present utility model is not limited thereto, but is also applicable to a cap type head-push type disposable blood collector. The twist cap and the cap are two forms of the blood collector protective cap, but the two forms are irrelevant to the innovation point of the utility model, which is the situation that a person skilled in the art can understand and recognize.

2. In the above embodiment 1, the tail of the ejector 4 is provided with four elastic pins 5 (see fig. 5 and 6) extending rearward. The utility model is not limited thereto but essentially the spring clip of the utility model should be made up of at least two spring pins 5. And thus may be two, three, four, five, six, etc. in number of spring pins 5. This is a situation that can be understood and appreciated by those skilled in the art.

3. In the above embodiment 1, the root parts of the elastic pins 5 are of a connected structure, and the two elastic pins 5 share one hook 6 (see fig. 5 and 6). However, the present utility model is not limited thereto, and the elastic pins 5 may be connected in pairs, or one elastic pin 5 may be independent of another elastic pin 5, and the hooks 6 located on the same side of the core 2 may be shared or separated. This does not affect the practice of the utility model. This is a variation that is readily understood by one skilled in the art.

4. In the above embodiment 1, as compared with fig. 13 and 16, or as compared with fig. 18 and 20, the elastic pin 5 is a straight arm type elastic cantilever structure. However, the present utility model is not limited thereto, and the elastic pin 5 may be a crank-shaped elastic cantilever structure or a folded-arm-shaped elastic cantilever structure. This is the case as will be appreciated and recognized by the person skilled in the art on the basis of example 1.

5. In the above embodiment 1, the spring 3 is a separate metal element, but the spring 3 may be designed as a plastic spring and made integrally with the needle core 2. Such variations will be readily appreciated by those skilled in the art.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. A novel disposable hemostix, which comprises a shell (1), a needle core (2), a spring (3) and a hair pushing device (4);

in the assembled state before the emission, the needle core (2) is clamped and positioned in the shell (1), the spring (3) is propped against the needle core (2), the elastic force of the spring (3) acts on the ejection direction of the needle core (2), the head of the hair pusher (4) extends out from the front end of the shell (1), and the body of the hair pusher (4) is connected in the shell (1) in a sliding way;

the method is characterized in that: at least two elastic pins (5) are arranged at the tail part of the hair pushing device (4) in a backward extending mode, the elastic pins (5) are of an elastic cantilever structure, and the tail end of the cantilever is an acting end (17); the elastic pin (5) is provided with a clamping hook (6) for locking the needle core (2); the elastic pin (5) is provided with a first bending point (7) and a second bending point (9) at intervals along the length direction of the elastic pin, and the first bending point (7) and the second bending point (9) are fatigue points with stress concentration on the elastic pin (5) during bending; the distance from the second bending point (9) to the acting end (17) is larger than the distance from the first bending point (7) to the acting end (17) by taking the acting end (17) as a reference; the clamping hook (6) is positioned near the first bending point (7) in the length direction of the elastic pin (5);

an inclined surface (10) is arranged in the shell (1) corresponding to the acting end (17) of the elastic pin (5), and a blocking surface (16) is arranged on the inclined surface (10); the inclined direction of the inclined plane (10) can force a section of elastic pin (5) from the acting end (17) to a first bending point (7) to bend towards the center of the cross section of the hemostix when the acting end (17) of the elastic pin (5) is hit;

a clamping surface (8) is arranged on the needle core (2) corresponding to the clamping hook (6), and the clamping surface (8) is matched with the clamping hook (6) to lock the needle core (2);

in the assembled state before the emission, all the elastic pins (5) form an elastic clamp together, the needle core (2) is clamped and positioned in the elastic clamp, wherein a clamping hook (6) on the elastic pin (5) is matched with a clamping surface (8) on the needle core (2) to enable the needle core (2) to be in a locking state; the elastic pin (5) is arranged in front of the inclined plane (10), wherein the acting end (17) of the elastic pin (5) is arranged in front of the inclined plane (10) in a face-to-face manner;

when the head of the hair pushing device (4) is pressed in a use state, the hair pushing device (4) moves backwards relative to the shell (1), the inclined surface (10) in the shell (1) correspondingly hits the action ends (17) of the elastic pins (5) respectively and forces one section of the action ends (17) of all the elastic pins (5) to the first bending point (7) to bend towards the center of the cross section of the blood collector, meanwhile, the action ends (17) of the elastic pins (5) slide to the blocking surface (16) along the inclined surface (10) and then are blocked, at the moment, the blocking surface (16) generates a jacking action on the elastic pins (5), and finally, all the elastic pins (5) are forced to bend or bend at the first bending point (7) and the second bending point (9), so that the first bending point (7) of the elastic pins (5) arch outwards and deform laterally, and when all the elastic pins (5) arch to a critical point of a clamping hook (6) and a clamping surface (8) are unhooked, the needle core (2) emits puncture under the action of the spring (3).

2. The hemostix of claim 1, wherein: the clamping hook (6) for locking the needle core (2) is arranged on the inner side surface of the elastic pin (5).

3. The hemostix of claim 1, wherein: the elastic pins (5) are of straight arm-shaped elastic cantilever structures.

4. The hemostix of claim 1, wherein: the elastic pin (5) is of a crank-arm-shaped elastic cantilever structure.

5. The hemostix of claim 1, wherein: the elastic pins (5) are of a folding arm type elastic cantilever structure.

6. The hemostix of claim 1, wherein: the side part of the hair pusher (4) is provided with a hook (12) and a shoulder (13), an inner end surface (14) is arranged on the inner wall of the shell (1) corresponding to the hook (12) and the shoulder (13), and the hook (12) on the hair pusher (4) and the inner end surface (14) are matched to form a first limit to prevent the hair pusher (4) from moving forwards relative to the shell (1) in the assembled state before being emitted; in the post-emission state, a shoulder (13) on the hair pusher (4) is matched with the inner end surface (14) to form a second limit, so that the hair pusher (4) is prevented from retreating relative to the shell (1), and the head of the hair pusher (4) is in a flush or retreating state relative to the head of the shell (1).

7. The hemostix of claim 1, wherein: the front part of the needle core (2) is provided with a twisting cap (11) so as to form the twisting cap type head pressing disposable hemostix.

8. The hemostix of claim 1, wherein: the front part of the needle core (2) is provided with a cap, so that the cap type head pressing type disposable hemostix is formed.

9. The hemostix of claim 1, wherein: the head of the shell (1) is provided with an adjusting head (15) structure capable of changing the puncture depth.