CN216455015U - Head pressing type mini disposable safety hemostix - Google Patents

Abstract

The utility model provides a disposable safe hemostix of head push type miniature, includes shell, nook closing member, pushes away and sends out ware and transmission spring, its characterized in that: the shell is designed into a cylindrical component with an open front end; the hair pusher is designed into a sleeve-shaped member, the front end of the hair pusher is provided with a needle point puncture hole, and the rear end of the hair pusher is provided with an open mouth; designing the whole needle core into a long strip-shaped component; the hair pusher and the stylet are designed to be capable of being inserted into the opening at the front end of the shell for assembly, and the hair pusher is locked on the shell through a one-way limiting structure between the hair pusher and the shell, so that the assembly is completed. This scheme has mainly carried out the improved design to the product structure from angles such as the manufacturability of the injection moulding nature of spare part structural design and big automatic assembly in batches, and on the one hand hemostix structure is more simple, and on the other hand is particularly suitable for big automatic production in batches and assembly, is favorable to further reducing product manufacturing cost, improves market competition.

Description

Head pressing type mini disposable safety hemostix

Technical Field

The utility model relates to the field of medical blood sampling instruments, in particular to a head pressing type miniature disposable safety hemostix (or blood sampling needle). The hemostix has the advantages of simple structure, good safety, reliable work and market competition potential.

Background

Among medical blood collection devices, disposable safety blood collection devices are popular among medical care personnel and patients due to the characteristics of small volume, safe use and convenient operation, and are widely used in various medical institutions and diabetics at present. The ejection mechanism of the hemostix is compact in structure, safe and convenient, and has strong market development potential, and the hemostix is integrally disposable.

The disposable hemostix products on the market have various structural forms, but the key points are summarized according to the triggering form, the first type is a head pressing type disposable safety hemostix, and the second type is a tail pressing type disposable safety hemostix. Both the head and tail pressing mean whether the member for triggering ejection of the blood collection device is located at the head or the tail of the blood collection device. From the general development trend of the current hemostix products, the market acceptance has been largely changed to be oriented to low product price, simple structure and reliable operation. Among the two types of hemostix products, the head pressing type disposable safety hemostix has simpler structure, lower cost and more market potential.

Head push type disposable safety hemostix includes shell, nook closing member usually, pushes away and sends out ware and transmission spring, and the nook closing member utilizes the elastic arm locking to push away to send out on the ware before the transmission, and the ware that pushes away that presses down the hemostix head during the use drives the nook closing member and moves backward, because the hindrance of the face of triggering on the shell inner wall forces the inward bending deformation of elastic arm, leads to the nook closing member unhook unblock, and the nook closing member launches the blood sampling forward under transmission spring's promotion. The head pressing type disposable safety hemostix in the current market has a complex structure, is not beneficial to large-batch automatic assembly production although the structure is simple, and is easy to cause the problems of poor product quality stability and reliability and the like. The reason for this analysis is related to the way of assembly and assembly operations on the one hand and the structural design of the product on the other hand.

In view of this, the present invention provides a head-pressing type disposable blood sampling device which has low manufacturing cost, few parts, reasonable structure design and is beneficial to mass automatic assembly production.

Disclosure of Invention

In view of the above disadvantages of the prior art, the present invention provides a head-pressing type miniature disposable safety blood collector, which aims to solve the problem of optimization between the structural design, mass automated assembly and manufacturing cost of the original head-pressing type disposable blood collector.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a disposable safe hemostix of head push type miniature, includes shell, nook closing member, pushes away and sends out ware and transmission spring, and the pointed direction of definition hemostix needle point is hemostix the place ahead, wherein:

the needle core is formed by connecting a protection rod at the front end with a needle handle with a needle body at the rear end.

The lateral part of the needle handle is provided with an elastic arm, the elastic arm is provided with a first blocking surface and a contact surface, a second blocking surface is arranged on the hair pusher corresponding to the first blocking surface, and the second blocking surface is matched with the first blocking surface to lock the needle core. The inner wall of the shell is provided with a triggering surface corresponding to the contact surface, and the triggering surface is matched with the contact surface to force the elastic arm to bend towards the inner side so as to unlock the stylet.

The innovation lies in that: the shell is a cylindrical component with an opening at the front end.

The hair pusher is a sleeve-shaped component, the front end of the hair pusher is provided with a needle point puncture hole, and the rear end of the hair pusher is provided with an open mouth.

The whole needle core is a strip-shaped component.

In an assembly state, the hair pusher is sleeved outside the needle core, the protective rod at the front end of the needle core extends out of the needle point puncture hole at the front end of the hair pusher, and the tail part of the needle core is exposed out of the opening at the rear end of the hair pusher; the inner wall of the hair pusher is provided with a stylet operation limiting track, a guide block is arranged on the stylet handle corresponding to the stylet operation limiting track, and the guide block and the stylet operation limiting track limit the ejection direction of the stylet handle.

Under the assembled state, the rear portion of pushing away the hair ware is followed stretch into in the shell in uncovered and with shell sliding fit on the hemostix fore-and-aft direction, be provided with the locking bump on the inner wall of shell uncovered department, correspond this locking bump and be equipped with first spacing face in the hair ware outer fringe, first spacing face is one-way limit structure with the locking bump cooperation, and this one-way limit structure restriction pushing away hair ware is relative shell forward motion, follows at the hair ware rear portion uncovered insertion shell in-process, will push away one-way spacing locking of hair ware on the shell when first spacing face is in coordination with the locking bump.

1. In the above scheme, the shell, the stylet, the launching spring and the hair pusher are the most basic structural members of the push type disposable blood collector, and the basic functions and functions of the disposable blood collector are the prior art.

2. In the scheme, the blood collector comprises a twisting cap which is sleeved on the head part of the blood collector. The twist cap is formed by integrally connecting a cap handle and a cap cover, wherein the cap handle is of a sleeve structure, the cap handle is sleeved on the protective rod of the needle core, the cap cover is of a cover structure, and the cap cover covers the head of the hair pusher.

3. In the scheme, the cap handle is sleeved on the protection rod, and the rear end of the shell is provided with the process hole for assembling the twist cap.

4. Among the above-mentioned scheme, including reset spring, this reset spring is located between hair pusher and the nook closing member under the assembled condition to the suit is outside the guard bar, and reset spring's one end supports and leans on the inside preceding terminal surface of hair pusher under the transmission state, and the needle handle that the other end contact and buffering launched forward.

5. In the scheme, the elastic arm is an arch bridge type elastic arm, the arch bridge type elastic arm is in an arch bridge shape, two ends of the arch bridge shape are fixedly arranged relative to the needle handle, and the bridge top of the arch bridge shape is used as an acting part of the elastic arm. The acting part is provided with a protrusion, the abutting surface is a protruded rear end face, and the first blocking surface is a protruded front end face.

The design principle and the effect of the utility model are as follows: in order to solve the problems of structural design, large-batch automatic assembly and optimized manufacturing cost of the original head pressing type disposable hemostix, the utility model adopts the following measures: firstly, the shell is designed into a cylindrical component with an open front end; secondly, the hair pusher is designed into a sleeve-shaped component, the front end of the hair pusher is provided with a needle point puncture hole, and the rear end of the hair pusher is provided with an opening; thirdly, the needle core is integrally designed into a long strip-shaped component; fourthly, the hair pusher and the stylet are designed to be assembled in an inserting mode from an opening at the front end of the shell, and the hair pusher is locked on the shell through a one-way limiting structure between the hair pusher and the shell, so that the assembly is completed. This scheme has mainly carried out the improved design to the product structure from angles such as the manufacturability of the injection moulding nature of spare part structural design and big automatic assembly in batches, and on the one hand hemostix structure is more simple, and on the other hand is particularly suitable for big automatic production in batches and assembly, is favorable to further reducing product manufacturing cost, improves market competition.

Drawings

FIG. 1 is an exploded perspective view of the blood collection device according to the embodiment of the present invention;

FIG. 2 is a perspective view of an outer shell according to an embodiment of the present invention;

FIG. 3 is a perspective cross-sectional view of a housing according to an embodiment of the present invention;

FIG. 4 is a front elevational view of the interior bottom of the housing (looking inward from the front end of the housing) in accordance with an embodiment of the present invention;

FIG. 5 is a perspective view of a hub according to an embodiment of the present invention;

FIG. 6 is an enlarged rear view of the hub of FIG. 5;

FIG. 7 is a front view of a hub according to an embodiment of the present invention;

FIG. 8 is a perspective view of a first perspective of a hair clipper in accordance with embodiments of the present invention;

FIG. 9 is a perspective cut-away view of a hair pusher in accordance with an embodiment of the present invention;

FIG. 10 is a perspective view of a second perspective of a hair clipper in accordance with embodiments of the present invention;

FIG. 11 is a right side view of a hair clipper of an embodiment of the present invention;

FIG. 12 is a front view of a hair clipper of an embodiment of the present invention;

FIG. 13 is a perspective view of a twist cap in accordance with an embodiment of the present invention;

FIG. 14 is a cross-sectional view of a twist cap in accordance with an embodiment of the present invention;

FIG. 15 is a perspective partial sectional view of an initial assembly state of an embodiment of the present invention;

FIG. 16 is a cross-sectional view of an initial assembly of an embodiment of the present invention;

FIG. 17 is a sectional view of the twist cap with the protective bar removed, according to an embodiment of the present invention;

FIG. 18 is a cross-sectional view of a dispenser in a depressed state according to an embodiment of the present invention;

FIG. 19 is a cross-sectional view of a blood collection launching configuration in accordance with an embodiment of the present invention;

FIG. 20 is a cross-sectional view of a firing spring in a naturally retracted state in accordance with an embodiment of the present invention;

FIG. 21 is a cross-sectional view of another embodiment of the present invention in an initial assembled state;

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

1. a housing; 11. locking the salient points; 12. a trigger surface; 13. a spring connecting column; 14. a guide ramp; 15. a sliding platform; 16. a sliding surface; 17. a fabrication hole; 2. a needle core; 22. a resilient arm; 23. a protrusion; 24. a first blocking surface; 25. a contact surface; 26. a guard bar; 27. a needle handle; 28. a needle body; 29. an impact surface; 3. a hair pusher; 31. a second blocking surface; 32. a second limiting surface; 33. the needle core runs the spacing orbit; 34. puncturing a hole by a needle tip; 36. a first limiting surface; 4. a firing spring; 5. twisting the cap; 51. a cap handle; 52. a cap; 53. a rib is protruded; 54. a groove; 6. a guide block; 7. a return spring.

Detailed Description

The utility model is further described with reference to the following figures and examples:

example (b): head push type mini disposable safety hemostix

As shown in fig. 1 to 20, the blood collecting device includes a housing 1, a needle core 2, a pusher 3, a firing spring 4, and a twist cap 5 (see fig. 1). Define the pointed direction of hemostix needle point and be hemostix the place ahead, wherein:

the needle core 2 is formed by connecting a protective rod 26 at the front end with a needle handle 27 with a needle body 28 at the rear end (see fig. 5-7). The protective rod 26 covers the needle point of the head of the needle body 28, and a disconnection part (see fig. 5-7) is arranged at the joint of the protective rod 26 and the needle handle 27 so as to break at the disconnection part when the protective rod 26 is screwed. The breaking part may be a necking structure, a notch, a cut mark, or even a sleeving structure sleeved on the needle handle 27, and the necking is shown in fig. 5 to 7 in this embodiment.

The side of the needle handle 27 is provided with a resilient arm 22 (see fig. 5-7), the resilient arm 22 is provided with a protrusion 23 (see fig. 5-7) for locking and unlocking, the front end of the protrusion 23 is provided with a first blocking surface 24 (see fig. 7), and the rear end of the protrusion 23 is provided with an interference surface 25 (see fig. 7). The interference surface 25 is a slanted surface (see fig. 5 and 7).

The first blocking face 24 faces the front of the blood collector (in the initial assembly state, see fig. 16), a second blocking face 31 is arranged on the ejector 3 corresponding to the first blocking face 24 (see fig. 8-12), the second blocking face 31 faces the rear of the blood collector (in the initial assembly state, see fig. 16), and the first blocking face 24 and the second blocking face 31 cooperate to limit the forward movement of the needle handle 27 relative to the ejector 3 and lock the needle core 2 relative to the ejector 3 (see fig. 16).

The elastic arm 22 is an arch bridge type elastic arm, the arch bridge type elastic arm is in an arch bridge shape (see fig. 6), two ends of the arch bridge shape are fixedly arranged relative to the needle handle 27, the bridge top of the arch bridge shape is used as an acting part of the elastic arm, and the bulge 23 is arranged on the acting part of the elastic arm (see fig. 6 and 7).

The interference surface 25 faces the back of the blood collection device (in the initial assembly state, see fig. 16), and a trigger surface 12 (see fig. 3-4) is provided on the inner wall of the housing 1 corresponding to the interference surface 25, and the trigger surface 12 cooperates with the interference surface 25 to force the elastic arm 22 to bend inward (see fig. 18) for unlocking the needle core 2. The triggering surface 12 may be a triggering inclined surface, a triggering arc surface, or even a triggering straight surface, but when the triggering surface 12 is a triggering straight surface, the contact surface 25 engaged with the triggering straight surface should be an inclined surface or an arc surface. Theoretically, at least one of the trigger surface 12 and the abutting surface 25 may be an inclined surface or a curved surface.

On the inner wall of the housing 1, a sliding platform 15 (see fig. 3) is provided for the protrusion 23, the front end surface of the sliding platform 15 is a trigger surface 12 (see fig. 3), and the top surface of the sliding platform 15 is a sliding surface 16 (see fig. 3) in the longitudinal direction of the blood collection device. The sliding surface 16 is a plane parallel to the ejection direction of the lancet (see fig. 16).

The needle core 2 is provided with an impact surface 29 (see fig. 5-7), the impact surface 29 faces the front of the blood collector, the hair pusher 3 is provided with a second limiting surface 32 (see fig. 9) corresponding to the impact surface 29, the second limiting surface 32 faces the rear of the blood collector (see fig. 13), and the impact surface 29 and the second limiting surface 32 are matched to limit the blood collection puncture depth (see fig. 19) in the launching process of the needle core 2.

The twist cap 5 is sleeved on the head of the blood collector (see fig. 13), the twist cap 5 is formed by integrally connecting a cap handle 51 and a cap 52 (see fig. 14), wherein the cap handle 51 is in a sleeve structure, the cap handle 51 is sleeved on the protective rod 26 of the stylet 2, the cap 52 is in a cover structure, and the cap 52 covers the head of the hair pusher 3 (see fig. 15). The cap handle 51 is provided with a rib 53 (see fig. 14) and a groove 54 (see fig. 5 and 7) of the protective rod 26, and the rib 53 and the groove 54 are matched to form a relative locking connection relationship when the twist cap 5 is sleeved on the protective rod 26. Here, it should be specifically noted that: during assembly, the stylet 2 and the hair pusher 3 are typically first loaded into the housing 1, and then the twist cap 5 is fitted over the forward end of the guard bar 26. In order to make the cap handle 51 fit over the protection rod 26 normally and make the rib 53 and the groove 54 cooperate to form a relative lock, a fabrication hole 17 (see fig. 3 and 4) is provided at the rear end of the housing 1. In the actual sleeving and twisting of the cap 5, a core rod or a positioning rod is required to extend into the outer shell 1 from the fabrication hole 17 at the rear end of the outer shell 1 and abut against the tail part of the needle core 2, so that the needle core 2 is not retracted. Otherwise, when the cap 5 is sleeved, the protective rod 26 moves and avoids to the back of the blood collector along with the needle core 2, so that the cap 5 cannot be sleeved.

In order to make the structure of the hemostix simpler, be suitable for mass automatic production and assembly, further reduce the manufacturing cost of products and improve the market competitiveness, the utility model designs the shell 1 into a cylindrical member with an open front end and a fabrication hole 17 at the tail part (see fig. 3 and 4). The hair pusher 3 is designed as a sleeve-shaped member, the front end of which is provided with a needle point puncture hole 34 and the rear end of which is provided with an opening (see figures 8-12). The needle core 2 is designed as a long strip-shaped member as a whole (see fig. 7).

In the assembled state, the hair pusher 3 is fitted around the needle core 2, the protective rod 26 at the front end of the needle core 2 protrudes from the needle point piercing hole 34 at the front end of the hair pusher 3, and the tail of the needle core 2 is exposed from the open end at the rear end of the hair pusher 3 (see fig. 16). The inner wall of the hair pusher 3 is provided with a stylet operation limiting track 33, the stylet operation limiting track 33 is provided with a guide block 6 on the needle handle 27, and the guide block 6 and the stylet operation limiting track 33 limit the ejection direction of the needle handle 27.

Under the assembled state, the rear portion of propelling movement ware 3 is followed stretch into in the uncovered shell 1 and with shell 1 sliding fit on the hemostix fore-and-aft direction, be provided with locking bump 11 on the inner wall of the uncovered department of shell 1, correspond this locking bump 11 and be equipped with first spacing face 36 on the propelling movement ware 3 outer fringe, first spacing face 36 cooperates with locking bump 11 and is one-way limit structure, and this one-way limit structure restriction propelling movement ware 3 moves forward relative to shell 1, follows at the propelling movement ware 3 rear portion the uncovered insertion shell 1 in-process, when first spacing face 36 with locking bump 11 cooperation with 3 one-way spacing locking of propelling movement ware on shell 1.

The assembling process of the embodiment can be that the stylet 2 and the hair pusher 3 are sleeved firstly, then the two are integrally inserted into the shell 1 from the front opening of the shell 1, so that the hair pusher 3 and the shell 1 are buckled into one-way limiting locking, and finally the twist cap 5 is sleeved. Or the needle core 2 is inserted into the shell 1, the hair pusher 3 is sleeved on the needle core 2, the hair pusher 3 and the shell 1 are buckled into a one-way limiting lock, and finally the twisting cap 5 is sleeved. Various assembling modes can be determined according to actual needs.

The initial assembly state and the using operation process of the embodiment of the utility model are as follows:

1. initial assembled state

Reference is now made to fig. 15-16, wherein fig. 15 is a perspective, partially cut-away view of an initially assembled state. Fig. 16 shows a sectional view of an initial assembly state. As can be seen in fig. 15, the internal ribs 53 of the twist cap 5 cooperate with the grooves 54 on the guard bar 26 to form a relative locking relationship. As can be seen in fig. 16, the core 2 is locked by the first blocking surface 24 against the second blocking surface 31 of the ejector 3. The twist cap 5 completely covers the hair pusher 3, and in an initial state, the hair pusher 3 cannot be pressed. Due to the interaction between twist cap 5 and housing 1, guard bar 26 on the hub 2 cannot move to the right, resulting in the ejection of the device.

2. State of protective rod detached from rotary twist cap

Referring to fig. 17, fig. 17 is a sectional view showing a state where the twist cap is removed from the protection lever. As can be seen in fig. 17, the twist cap 5 is rotated to rotate the protective bar 26 of the stylet 2, the twist cap 5 and the protective bar 26 are removed, and the needle shaft 27 is locked on the hair pusher 3 at all times (the needle shaft 27 is locked by the first blocking surface 24 abutting against the second blocking surface 31 of the hair pusher 3).

3. Pressing the state of the hair-pushing device

Referring to FIG. 18, wherein FIG. 18 shows a cross-sectional view of the pusher being pressed. As can be seen in fig. 18, when the front end of the pusher 3 is pressed (indicated by two arrows), the pusher 3 moves the needle shaft 27 to the right, and when the protrusion 23 on the top of the needle shaft 27 and the elastic arm 22 passes the trigger surface 12 inside the housing 1, the elastic arm 22 is forced to deform inward, so that the first blocking surface 24 is unhooked from the second blocking surface 31, and finally the needle shaft 27 is unlocked.

4. Emission blood sampling state

Referring to fig. 19, fig. 19 is a sectional view showing a state of emitting blood collection. As can be seen from fig. 19, the needle handle 27 is unlocked, and the needle handle 27 is rapidly moved (shot) to the left under the pushing of the launching spring 4 until the striking surface 29 at the front end of the needle handle 27 strikes against the second limiting surface 32 on the ejector 3 to limit the blood sampling puncture depth (see fig. 19), so that the puncture is completed.

5. Naturally retracted state of firing spring

Reference is now made to fig. 20, wherein fig. 20 is a sectional view of the firing spring in its naturally retracted state. As can be seen in figure 20, the firing spring 4 naturally retracts, bringing the needle shaft 27 back into the ejector 3.

Other embodiments and structural variations of the present invention are described below:

1. in the above embodiment, the elastic arm 22 has an arch-bridge type elastic arm structure, and it can be seen from fig. 7 that the elastic arm 22 has an arch shape, and both ends of the elastic arm are fixedly connected to the needle handle 27. The present invention is not so limited and the resilient arm may be of a single cantilever structure, a variation of which will be appreciated and appreciated by those skilled in the art. Compared with the elastic arm with a single cantilever structure, the elastic arm structure with the arch bridge structure has larger elastic force theoretically.

2. In the above embodiment, the elastic arm 22 is provided with the protrusion 23, the front end surface of the protrusion 23 is the first blocking surface 24, and the rear end surface of the protrusion 23 is the abutting surface 25 (see fig. 7). The utility model is not limited thereto, for example, the resilient arm 22 is provided with two different protruding structures, the first blocking surface 24 being provided on one of the protruding structures and the interference surface 25 being provided on the other protruding structure. Such a design is also feasible in practice, a variation which can be understood and appreciated by those skilled in the art.

3. In the above embodiment, the elastic arm 22 is provided with the protrusion 23. The present invention is not limited thereto and the resilient arm 22 may be formed without the protrusion 23, and the protrusion 23 is not a necessary structure for the present invention. For example, the elastic arm 22 may be designed as a general cantilever structure, and an end surface of the cantilever end may be a first stopper surface 24, and the other side of the end surface of the cantilever end may be an interference surface 25. This is a variation that can be understood and appreciated by those skilled in the art.

4. In the above embodiment, the sliding surface 16 is a plane parallel to the ejection direction of the lancet (see fig. 16). However, the present invention is not limited thereto, and the sliding surface 16 may be a plane surface, but also an inclined surface, and the included angle between the inclined surface and the needle body 28 is not too large. The arc surface can also be a cambered surface, and the curvature radius of the cambered surface is not easy to be too small and is relatively flat.

5. In the above embodiment, the interference surface 25 is a slope (see fig. 5 and 7). However, the present invention is not limited thereto, and the abutting surface 25 may be a straight surface or a curved surface. The differences between the straight and the inclined planes are: the former is a plane facing the rear of the blood collection device, and the latter is a plane inclined with respect to the plane.

6. In the above embodiment, the housing 1 is an integrally formed structure, the two sides of the rear portion in the housing 1 are provided with the guiding inclined planes 14 for guiding the installation of the launching spring 4, and the rear end in the housing 1 is provided with the spring connecting column 13 for positioning the launching spring 4. The present invention is not so limited and such variations are understood and appreciated by those skilled in the art.

7. In the above embodiment, the housing 1, the needle core 2, the hair pusher 3, the launching spring 4 and the twist cap 5 are assembled to form an independent hemostix product. However, considering that the guard bar 26 is thin and inconvenient to operate, a twist cap 5 may be added to the head of the blood collection set, and the twist cap 5 is fitted over the head of the hair pusher 3 in an initial assembly state (see fig. 1). However, the present invention is not limited thereto, and the twist cap 5 may be removed to form a separate hemostix product with only the housing 1, the needle core 2, the hair pusher 3 and the firing spring 4.

8. In the above embodiment, in addition to the blood sampling device comprising the housing 1, the needle core 2, the hair pusher 3, the launching spring 4 and the twist cap 5, the blood sampling device may further comprise a return spring 7, the return spring 7 is located between the hair pusher 3 and the needle core 2 in the assembled state and is sleeved outside the protection rod 26, one end of the return spring 7 abuts against the inner front end face of the hair pusher 3 in the launching state, and the other end contacts and buffers the needle handle 27 (see fig. 21) which is launched forward. In this case, the catch for locking the firing spring 4 at the rear of the cartridge holder 27 can be eliminated. The reset spring 7 can prevent the needle tip from being exposed after the hemostix is used, and can prevent the occurrence of secondary puncture.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (8)

1. A head pressing type miniature disposable safety hemostix comprises a shell (1), a needle core (2), a pushing device (3) and an emission spring (4), wherein the direction pointed by the needle point of the hemostix is defined as the front of the hemostix, wherein:

the needle core (2) is formed by connecting a protection rod (26) at the front end with a needle handle (27) with a needle body (28) at the rear end;

the side part of the needle handle (27) is provided with an elastic arm (22), the elastic arm (22) is provided with a first blocking surface (24) and an abutting surface (25), a second blocking surface (31) is arranged on the hair pusher (3) corresponding to the first blocking surface (24), and the second blocking surface (31) is matched with the first blocking surface (24) to lock the needle core (2); a triggering surface (12) is arranged on the inner wall of the shell (1) corresponding to the interference surface (25), and the triggering surface (12) is matched with the interference surface (25) to force the elastic arm (22) to bend towards the inner side so as to unlock the stylet (2);

the method is characterized in that: the shell (1) is a cylindrical component with an open front end;

the hair pusher (3) is a sleeve-shaped component, the front end of the hair pusher is provided with a needle point puncture hole (34), and the rear end of the hair pusher is provided with an opening;

the needle core (2) is a strip-shaped component as a whole;

in an assembly state, the hair pusher (3) is sleeved outside the needle core (2), the protective rod (26) at the front end of the needle core (2) extends out of the needle point puncture hole (34) at the front end of the hair pusher (3), and the tail part of the needle core (2) is exposed out of the opening at the rear end of the hair pusher (3); the inner wall of the hair pusher (3) is provided with a stylet operation limiting track (33), a needle handle (27) corresponding to the stylet operation limiting track (33) is provided with a guide block (6), and the guide block (6) and the stylet operation limiting track (33) limit the ejection direction of the needle handle (27);

under the assembled state, the rear portion of pushing away and sending out ware (3) is followed stretch into in uncovered shell (1) and with shell (1) sliding fit in the front and back direction of hemostix, be provided with locking bump (11) on the inner wall of shell (1) opening department, be equipped with first spacing face (36) on pushing away and sending out ware (3) outer fringe corresponding this locking bump (11), first spacing face (36) and locking bump (11) cooperation are one-way limit structure, this one-way limit structure restriction pushing away sends out ware (3) and moves forward relatively shell (1), follow at pushing away and sending out ware (3) rear portion the uncovered insertion shell (1) in-process, will push away one-way spacing locking of sending out ware (3) on shell (1) when first spacing face (36) and locking bump (11) are cooperated.

2. The head push type mini disposable safety hemostix according to claim 1, wherein: comprises a twist cap (5), and the twist cap (5) is sleeved on the head of the hemostix.

3. The head push type mini disposable safety hemostix according to claim 2, wherein: the twist cap (5) is formed by integrally connecting a cap handle (51) and a cap cover (52), wherein the cap handle (51) is of a sleeve structure, the cap handle (51) is sleeved on the protective rod (26) of the needle core (2), the cap cover (52) is of a cover structure, and the cap cover (52) covers the head of the hair pusher (3).

4. The head push type mini disposable safety hemostix according to claim 3, wherein: one of the cap handle (51) and the protective rod (26) is provided with a convex rib (53), the other is provided with a groove (54), and the convex rib (53) and the groove (54) are matched to form a relative locking connection relationship.

5. The head push type mini disposable safety hemostix according to claim 3, wherein: aiming at the fact that a cap handle (51) is sleeved on a protective rod (26), a process hole (17) is formed in the rear end of the shell (1) and used for assembling a twist cap (5).

6. The head push type mini disposable safety hemostix according to claim 1, wherein: including reset spring (7), this reset spring (7) are located between hair pusher (3) and nook closing member (2) under the assembled condition to the suit is outside protection rod (26), and reset spring (7)'s one end supports and leans on the preceding terminal surface of hair pusher (3) inboard under the transmission state, and the other end contacts and cushions needle handle (27) of launching forward.

7. The head push type mini disposable safety hemostix according to claim 1, wherein: the elastic arm (22) is an arch bridge type elastic arm which is in an arch bridge shape, two ends of the arch bridge shape are fixedly arranged relative to the needle handle (27), and the bridge top of the arch bridge shape is used as an acting part of the elastic arm.

8. The head push type mini disposable safety hemostix according to claim 7, wherein: be provided with arch (23) on the effect portion, conflict face (25) are the rear end face of arch (23), first stop face (24) are the preceding terminal surface of arch (23).

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