CN214911833U

CN214911833U - Disposable self-destruction syringe

Info

Publication number: CN214911833U
Application number: CN202022959624.XU
Authority: CN
Inventors: 宋建强
Original assignee: Shanxi Xinhuamei Medical Apparatus Co ltd
Current assignee: Shanxi Xinhuamei Medical Apparatus Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-11-30
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a disposable self-destruction syringe, which comprises an outer sleeve and a core bar which can slide in the outer sleeve, wherein the top end of the core bar is provided with a front hook and a piston; the needle seat mechanism comprises a backspacing hard needle seat, a backspacing soft needle seat and a detachable needle seat body, wherein the backspacing hard needle seat, the backspacing soft needle seat and the detachable needle seat body are sequentially sleeved outside the steel needle from inside to outside; the needle seat body is arranged at the top end of the outer sleeve, the lower end of the steel needle is fixedly arranged in the backspacing hard needle seat, and the lower end of the backspacing hard needle seat is arranged in a central hole of the backspacing soft needle seat; the retroversion soft needle seat is in interference fit with the inner wall of the outer sleeve and the inner wall of the needle seat body. The utility model effectively solves the problems of non-repeated use of the injector and sharp injury of the needle after use.

Description

Disposable self-destruction syringe

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a disposable self-destruction syringe.

Background

As early as the 15 th century, kathler, italian, proposed the principle of the syringe. The first human trials were not performed until 1657 in the british boyle and rayne. Abel, a surgeon in the French Queen Louis sixteen (in 1774 and 1792) military, has also conceived a piston syringe. Prasutz in france is generally considered the inventor of the syringe. He manufactured the syringe in 1853, which was made of silver and had a volume of only 1 ml and a threaded plunger rod.

The first Fragren of England used a glass syringe. The glass has good transparency, and the condition of the injected medicine can be seen. The syringe made of glass tube metal can be used for sterilization by boiling, and the needle can be used for sharpening and sterilization. The existing syringe is made of plastic and is thrown away once, so that the risk of infection during injection is greatly reduced. In order to ensure hygiene and prevent cross-infection, modern syringes are often made of plastic.

Because the existing disposable sterile syringe has the phenomenon of repeated use, the cross infection of germs is increased, and potential harm is brought to users. Meanwhile, after the injection of the injector is finished, the phenomenon that the needle tip is exposed and stabs clinical users is also not clear. According to incomplete statistics, 3500-12000 medical workers are diagnosed to be infected by needle point puncture every year. The problem of cross-infection with syringe use is further highly appreciated by the relevant national authorities. In order to eliminate the injury to medical staff caused by the repeated use of the syringe and the exposed needle point, a disposable self-destruction safety syringe is needed.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects or shortcomings, the utility model aims to provide a disposable self-destruction syringe.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the disposable self-destruction syringe comprises an outer sleeve and a core bar capable of sliding in the outer sleeve, wherein the top end of the core bar is provided with a front hook and a piston; the needle seat mechanism comprises a backspacing hard needle seat, a backspacing soft needle seat and a detachable needle seat body, wherein the backspacing hard needle seat, the backspacing soft needle seat and the detachable needle seat body are sequentially sleeved outside the steel needle from inside to outside; the needle seat body is arranged at the top end of the outer sleeve, the lower end of the steel needle is fixedly arranged in the backspacing hard needle seat, and the lower end of the backspacing hard needle seat is arranged in a central hole of the backspacing soft needle seat; the retroversion soft needle seat is in interference fit with the inner wall of the outer sleeve and the inner wall of the needle seat body.

Before the injector is used, the front hook is positioned below the withdrawing soft needle base, the top end of the withdrawing hard needle base penetrates through the upper end surface of the needle base body, and a hard withdrawing front step at the upper end of the withdrawing hard needle base is clamped with a needle base front limiting table of the needle base body.

When the piston moves to the shaft shoulder position of the outer sleeve, the front hook is clamped with the soft backward locking platform in the step hole of the backward soft needle seat.

The center hole in the backspacing soft needle base comprises a straight cylinder type mounting hole matched with the backspacing hard needle base and a step hole matched with the front hook, and the straight cylinder type mounting hole is communicated with the step hole.

The rollback hard needle seat is in interference fit with the straight cylinder type mounting hole, and a hard rollback backward step of the rollback hard needle seat is matched with a soft rollback forward step of the rollback soft needle seat.

The soft withdrawing-prevention step of the withdrawing-soft needle seat is in interference fit with the outer sleeve withdrawing-prevention step at the position of the shaft shoulder of the outer sleeve.

The outer sleeve top circumference is provided with cyclic annular arch, the inner wall of needle file body set up with cyclic annular protruding assorted needle file back sealing ring recess, cyclic annular arch and needle file back sealing ring recess looks block.

The piston is in interference fit with the inner wall of the outer sleeve, a first groove is formed in the top of the core rod in the circumferential direction, and the first groove is clamped with the piston.

The core rod is circumferentially provided with a breaking groove.

And an anti-misoperation platform is arranged at the tail part of the core rod.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a disposable self-destruction syringe, which can complete the needle returning action of a steel needle by matching a needle seat body, a returning hard needle seat, a returning soft needle seat and a core rod, so that the steel needle can be accommodated in an outer sleeve when discarded after the syringe is used, and the problem that the needle head is exposed to hurt medical care personnel after the injection is completed is effectively solved; through the design of the breaking groove on the core rod, the core rod can be easily broken after the steel needle is back, the self-destruction of the injector is completed, and the defect of repeated use of the injector is effectively overcome; through the design of the misoperation prevention platform on the core rod, misoperation prevention pressing operation can be performed on the core rod, the front hook at the top end of the core rod is prevented from moving into the soft withdrawing back locking platform on the withdrawing soft needle base in advance, and the core rod is prevented from being pressed carelessly, so that the injector is in a working state and the injector is wasted.

The utility model discloses, when improving syringe self-destruction safety, do not influence its injection method, the specially adapted is fast accuse center to the injection of bacterin and each medical unit to the injection of patient. The device has the advantages of scientific and reasonable design, simple structure, reliable effect and low cost.

Drawings

FIG. 1 is a schematic view of the structure of the device of the present invention;

FIG. 2 is a schematic structural view of the needle hub mechanism of FIG. 1;

FIG. 3 is a schematic structural diagram of the device of the present invention;

fig. 4 is a schematic structural diagram of the device of the present invention;

fig. 5 is a schematic structural diagram of the device of the present invention.

In the figure, 1000 — outer sleeve; 2000-core bar; 3000-steel needle; 4000-a needle holder body; 5000-retraction soft needle seat; 6000-retraction hard needle seat; 7000-a piston; 8000-protective sleeve; 1001 — front seal table; 1002-preventing the jacket from moving back; 2001-anti-misoperation tables; 2002-front hook; 2003-breaking the groove; 2004-limit piston table; 4001-a front needle seat limiting table; 4002-rear sealing ring groove of the needle seat; 5001-soft retreating front step; 5002-locking after soft backing; 5003-anti-retreat step after soft retreat; 6001-hard retreat front step; 6002-hard back step.

Detailed Description

The present invention will be described in detail with reference to the drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the disposable self-destruction syringe comprises an outer sleeve 1000 and a core rod 2000 capable of sliding in the outer sleeve 1000, wherein a front hook 2002 is arranged on the top end surface of the core rod 2000, and an anti-misoperation platform 2001 is arranged at the tail part of the core rod 2000; the needle seat mechanism is arranged at the top end of the outer sleeve 1000 and comprises a retraction hard needle seat 6000, a retraction soft needle seat 5000 and a detachable needle seat body 4000, wherein the retraction hard needle seat 6000, the retraction soft needle seat 5000 and the detachable needle seat body 4000 are sequentially sleeved outside the steel needle 3000 from inside to outside; the needle seat body 4000 is arranged at the top end of the outer sleeve 1000, the lower end of the steel needle 3000 is fixedly arranged in a backspacing hard needle seat 6000, the lower end of the backspacing hard needle seat 6000 is arranged in a central hole of a backspacing soft needle seat 5000, and the backspacing soft needle seat 5000 is in interference fit with the inner wall of the top end of the outer sleeve 1000 and the inner wall of the upper end of a central mounting hole of the needle seat body 4000.

Specifically, the top end of the retraction hard needle base 6000 penetrates through the central mounting hole of the needle base body 4000, and the hard retraction front step 6001 at the upper end of the retraction hard needle base 6000 is clamped with the needle base front limiting table 4001 at the upper end in the central mounting hole of the needle base body 4000, so that the retraction hard needle base 6000 with the steel needle 3000 is prevented from falling off from the needle base mechanism.

After the anti-misoperation platform 2001 on the core bar 2000 is removed, the core bar 2000 is pressed to enable the piston 7000 to move to the position of the shaft shoulder of the outer sleeve 1000, the front hook 2002 is clamped with the soft-back locking platform 5002 in the stepped hole of the back-off soft needle seat 5000, and the separation pulling force of the front hook 2002 and the soft-back locking platform 5002 is greater than 35N.

Further, as shown in fig. 1, 3, 4 and 5, the lower end of the steel needle 3000 is fixedly mounted in the retraction hard needle holder 6000, and for example, the steel needle 3000 is glued in the central mounting hole of the retraction hard needle holder 6000; as shown in fig. 2, the central hole in the retracting soft needle seat 5000 comprises a straight-tube-shaped mounting hole at the upper end of the retracting soft needle seat 5000 and matched with the retracting hard needle seat 6000, and a step hole at the lower end of the retracting soft needle seat 5000 and matched with the front hook 2002 at the top end of the core rod 2000, and the straight-tube-shaped mounting hole in the retracting soft needle seat 5000 is communicated with the step hole.

Preferably, as shown in fig. 2, the retraction hard needle base 6000 is in interference fit with the straight installation hole of the retraction soft needle base 5000, and the hard retraction step 6002 of the retraction hard needle base 6000 is matched with the soft retraction forward step 5001 of the retraction soft needle base 5000, so as to prevent the retraction hard needle base 6000 from retracting towards the tail of the outer sleeve 1000, which causes the steel needle 3000 to retract backwards; the specific retroversion soft needle seat 5000 is wrapped on the external interference sealing fit of the retroversion hard needle seat 6000, and the wrapping friction force between the retroversion soft needle seat 5000 and the retroversion hard needle seat 6000 is more than 20N.

Preferably, as shown in fig. 3, the retraction soft needle holder 5000 is in interference fit with the inner wall of the needle holder body 4000, namely, in friction seal fit, and the relative friction force between the retraction soft needle holder 5000 and the needle holder body 4000 is 8-15N; the soft retraction anti-retraction step 5003 of the retraction soft needle holder 5000 is in interference fit with the outer sleeve anti-retraction platform 1002 at the shaft shoulder position of the outer sleeve 1000, so that the soft retraction anti-retraction step 5003 is in friction seal fit with the outer sleeve anti-retraction platform 1002; and the anti-withdrawal force of the two is 5-8N.

Further, as shown in fig. 1, the needle holder body 4000 is mounted on the top end of the outer sleeve 1000 in a clamping manner; the inner wall of the lower end of the central mounting hole of the needle holder body 4000 is in interference fit with the outer wall of the top end of the outer sleeve 1000, so that friction seal fit is achieved, an annular protrusion, namely a front sealing platform 1001 of the outer sleeve 1000, is arranged on the circumferential direction of the top of the outer sleeve 1000, a needle holder rear sealing ring groove 4002 matched with the front sealing platform 1001 is formed in the inner wall of the central mounting hole of the needle holder body 4000, the front sealing platform 1001 and the needle holder rear sealing ring groove 4002 are clamped, sealing is achieved, and meanwhile the separating force between the front sealing platform 1001 and the needle holder rear sealing ring groove 4002 is larger than 35N.

Further, as shown in fig. 1, when the top end of the misoperation prevention table 2001 interferes with the bottom end face of the outer sleeve 1000; the anti-misoperation platform 2001 is used for limiting the core rod 2000 to realize anti-misoperation pressing-down operation; before the injector is used, the core rod 2000 is prevented from being pressed to the bottom by carelessness, and the front hook 2002 at the top end of the core rod 2000 is prevented from moving to the soft retroversion locking platform 5002 on the retroversion soft needle seat 5000 in advance and being locked in advance, so that the waste of the injector is prevented.

Preferably, as shown in fig. 1, 3, 4 and 5, a piston 7000 is sleeved on the top of the core rod 2000, and the piston 7000 is in interference fit with the inner wall of the outer sleeve 1000; further, a first groove is circumferentially formed in the top of the core rod 2000, the first groove comprises an upper limiting piston platform 2004 and a lower limiting piston platform 2004, and the first groove is clamped with the piston 7000; the first groove is used for limiting and fixing the piston 7000.

Preferably, as shown in fig. 1, a break groove 2003 is circumferentially formed on the core rod 2000; the break groove 2003 is located below the limit piston table 2004.

In the utility model, as shown in fig. 1, a protective sleeve 8000 is sleeved on the outer side of the needle seat body 4000 to prevent the medical staff from being pricked and protect the steel needle 3000 from being polluted.

The utility model discloses a theory of operation and process:

1. before the injector is used, the front hook 2002 on the core rod 2000 is positioned below the retraction soft needle seat 5000;

2. when the injector is used, the anti-misoperation platform 2001 is removed, the core rod 2000 is pressed, and when the piston 7000 runs to the shaft shoulder position of the outer sleeve 1000, the front hook 2002 on the core rod 2000 is locked with the soft-retraction locking platform 5002 on the retraction soft needle seat 5000, so that the injection operation is completed;

3. when the injector is discarded after use, the core rod 2000 is pulled towards the tail part of the outer sleeve 1000, and the front hook 2002 on the core rod 2000 is locked and connected with the soft backward locking platform 5002 on the backward soft needle seat 5000 into a whole; the core rod 2000 drives the integrated retracting soft needle seat 5000, retracting hard needle seat 6000 and steel needle 3000 to move into the outer sleeve 1000;

4. when the break-off groove 2003 on the core pin 2000 is moved to the end of the outer sleeve 1000, the core pin is broken off from the break-off groove 2003 of the core pin and the syringe completes self-destruction.

It should be apparent to those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and therefore, the modifications and changes that can be made by those skilled in the art to some parts of the present invention still embody the principles of the present invention, and the objects of the present invention are achieved, all falling within the scope of the present invention.

Claims

1. The disposable self-destruction syringe is characterized by comprising an outer sleeve (1000) and a core bar (2000) capable of sliding in the outer sleeve (1000), wherein the top end of the core bar (2000) is provided with a front hook (2002) and a piston (7000); the needle seat mechanism is arranged at the top end of the outer sleeve (1000) and comprises a backspacing hard needle seat (6000), a backspacing soft needle seat (5000) and a detachable needle seat body (4000), wherein the backspacing hard needle seat (6000), the backspacing soft needle seat (5000) and the detachable needle seat body are sleeved outside the steel needle (3000) from inside to outside in sequence; the needle seat body (4000) is arranged at the top end of the outer sleeve (1000), the lower end of the steel needle (3000) is fixedly arranged in a backspacing hard needle seat (6000), and the lower end of the backspacing hard needle seat (6000) is arranged in a central hole of a backspacing soft needle seat (5000); the retroversion soft needle seat (5000) is in interference fit with the inner wall of the outer sleeve (1000) and the inner wall of the needle seat body (4000).

2. The disposable self-destruction syringe according to claim 1, wherein the front hook (2002) is positioned below the retraction soft needle holder (5000) before the syringe is used, the top end of the retraction hard needle holder (6000) passes through the upper end surface of the needle holder body (4000), and the hard retraction front step (6001) at the upper end of the retraction hard needle holder (6000) is engaged with the needle holder front limit table (4001) of the needle holder body (4000).

3. The disposable self-destruct syringe according to claim 1, characterized in that when the piston (7000) is moved to the shoulder position of the outer sleeve (1000), the front hook (2002) engages with the soft backward locking step (5002) in the stepped hole of the backward soft needle seat (5000).

4. The disposable self-destruction syringe according to claim 1, wherein the central hole in the retracting soft needle holder (5000) comprises a straight cylinder type mounting hole matched with the retracting hard needle holder (6000) and a step hole matched with the front hook (2002), and the straight cylinder type mounting hole is communicated with the step hole.

5. The disposable self-destruct syringe according to claim 4, characterized in that the retracted hard needle base (6000) is interference fitted with the straight barrel type mounting hole, and the hard retraction step (6002) of the retracted hard needle base (6000) is fitted with the soft retraction forward step (5001) of the retracted soft needle base (5000).

6. The disposable self-destruction syringe according to claim 1, wherein the soft retreat prevention step (5003) of the retreat soft needle holder (5000) is in interference fit with the outer sheath retreat prevention step (1002) at the shoulder position of the outer sleeve (1000).

7. The disposable self-destruction syringe according to claim 1, wherein an annular protrusion is circumferentially arranged at the top of the outer sleeve (1000), a needle hub rear sealing ring groove (4002) matched with the annular protrusion is formed on the inner wall of the needle hub body (4000), and the annular protrusion is clamped with the needle hub rear sealing ring groove (4002).

8. The disposable self-destruction syringe according to claim 1, wherein the plunger (7000) is in interference fit with the inner wall of the outer sleeve (1000), and the top of the core rod (2000) is circumferentially provided with a first groove which is engaged with the plunger (7000).

9. The disposable self-destructing syringe according to claim 1, wherein the core rod (2000) is provided with a break-off groove (2003) in the circumferential direction.

10. The disposable self-destructive syringe according to claim 1, wherein the tail of said core rod (2000) is provided with an anti-misoperation platform (2001).