WO2021217781A1

WO2021217781A1 - Self-destructive syringe

Info

Publication number: WO2021217781A1
Application number: PCT/CN2020/094343
Authority: WO
Inventors: 余刚; 刘建明; 卢金云
Original assignee: 安徽宏宇五洲医疗器械股份有限公司
Priority date: 2020-04-26
Filing date: 2020-06-04
Publication date: 2021-11-04

Abstract

A self-destructive syringe capable of being provided with a needle for use, comprising: a needle barrel which comprises a barrel body (1) having an accommodating hole, a thrust portion (2) formed in the direction from the barrel body (1) to the needle, a needle connecting portion (3) formed in the direction from the thrust portion (2) to the needle to allow for mounting of the needle, the needle connecting portion (3) being tubular and communicated with the accommodating hole, and a stop portion (9) formed at the inner edge of the needle connecting portion (3); a plunger rod which comprises a rod body (4) and a plunger flange (5) for pushing and pulling by fingers and provided at the rear end of the rod body (4); and plunger stopper which comprises a plunger seal (7) in a disk shape and movably plugged into the accommodating hole of the needle barrel, and a connecting body (6) fixedly connected between the plunger seal (7) and the front end of the rod body (4), wherein a tapered stop rod (8) passing through the plunger seal (7) further extends from the end of the connecting body (6) facing the needle connecting portion (3), and a stop flange (10) is formed on the outer peripheral wall of the tapered stop rod (8). The entire syringe is destructed by means of a single operation, thereby avoiding the needle barrel part from being reused.

Description

Self-destructable syringe

Technical field

The invention relates to the field of medical equipment, and in particular to a self-destructable syringe.

Background technique

All over the world, the reuse of syringes has always been a major hidden danger in medical treatment. The intravenous drug addicts who usually share and reuse syringes are also a high-risk group of AIDS. Every year, someone will be infected with HIV because of sharing and reusing syringes. . In addition, in many developing countries, the repeated use of syringes has caused cross-infection of viruses in the population, and incidents that endanger the lives of patients frequently occur, which is worrying.

A large number of syringes are designed in the prior art to solve this problem. Some require specific actions to destroy the syringe after use, or use a sabotage device or a fragile area on the syringe to make it unusable with the help of external force. These fragile areas are common on the push rod used to push the liquid. The push rod can be broken by external force. However, this will not cause any damage to the syringe barrel part. After the syringe part is refitted with a push rod, it can still be broken. Was used again.

Summary of the invention

The present invention intends to propose a self-destructable syringe, which can destroy the entire syringe through one action, so as to solve the problem that the self-destructable syringe in the prior art can leave the undamaged part of the syringe after one destruction, causing it to still be destroyed. Part of the technical problem of reuse.

The self-destructable syringe of the present invention can be used with a needle, and the syringe includes:

A needle cylinder, the needle cylinder having a cylinder body with an accommodating hole, a thrust part formed by the cylinder body in the direction of the needle, and a needle connection part formed by the thrust toward the needle for the needle to be installed, The needle connecting portion is tubular in shape and communicates with the containing hole, and also has a locking portion formed on the inner edge of the needle connecting portion;

A putter, the putter has a shaft, and a push-pull part for finger pushing and pulling is provided at the rear end of the shaft;

A stopper set, the stopper set has a disc-shaped plug body that can be movably plugged in the accommodating hole of the syringe, and a connecting body fixedly connected between the plug body and the front end of the shaft; A locking cone rod passing through the plug body extends from the end of the connecting body toward the needle connecting portion; a locking edge is formed on the outer peripheral wall of the locking cone rod, and the locking edge can be elastic forward It passes through the locking portion in a deformed manner and then is locked in the locking portion when retreating.

Further, the push rod has a disconnection structure formed between the shaft and the connecting body, and when the stopper set is pulled back by the push rod, the push rod disconnection structure can produce a disconnection. Leave.

Further, the locking portion presents an annular protrusion formed from the inner edge of the needle connecting portion in the direction of the central axis of the needle connecting portion, and the inner edge of the annular protrusion forms a hollow concave Luer cone The large end of the Luer cone faces the inside of the barrel.

Further, the outer circumference of the locking edge forms a Luer cone shape that matches with the inner edge of the annular protrusion.

Further, the locking edge forms a middle part in the axial direction of the locking cone rod.

Further, the thrust part is in the shape of a hollow Luer taper protruding toward the needle.

Further, the plug body of the stopper set is tapered toward one end of the thrust part.

Further, the plug body is a plug body made of rubber.

Further, the plug body is in the shape of a hollow cap and is sleeved outside the connecting piece.

Further, the breaking structure is a pull-breakable connecting post formed between the shaft and the connecting piece.

Further, the number of the connecting column is one, which is formed between the center of the front end surface of the shaft and the center point of the rear end surface of the connecting member.

When the self-destructable syringe of the present invention is used to the end of the liquid ejection, following the liquid ejection action, the locking cone rod can be pushed into the needle connection part as a whole, and the locking edge can easily pass forward through the locking part. After passing, you can no longer withdraw.

In the self-destructable syringe of the present invention, the user can complete the entire destruction of the syringe in one action during injection, so that the push rod can be partially reused without separating the syringe.

In some embodiments, since the push rod has a disconnected structure connected between the shaft and the connecting body, it can also be actively implemented or passively implemented when someone attempts to use the syringe in this embodiment again. The second damage caused the shaft to be separated from the stopper group, and the shaft itself cannot be reused. The stopper group left in the syringe prevents the syringe from being used again, which solves the prior art The self-destructable syringe can leave the syringe part undamaged once destroyed, causing the technical problem that it can still be partially reused, and it can be destroyed passively for the second time, which better avoids the syringe from being reused The problem.

Description of the drawings

Figure 1 is an exploded view of a self-destructable syringe in an embodiment of the present invention;

2 is a partial cross-sectional view of the self-destructable syringe in the embodiment of the present invention when it is in a state where the liquid is pushed;

Figure 3 is an enlarged view of A in Figure 2;

4 is a cross-sectional view of the self-destructable syringe in the embodiment of the present invention after being self-destructed.

Reference signs include: barrel 1, thrust portion 2, needle connecting portion 3, shaft 4, push-pull portion 5, connecting body 6, plug body 7, locking cone rod 8, locking portion 9, locking edge 10 , Connecting column 11.

Detailed ways

The components of the self-destructable syringe in this embodiment are shown in FIG. The thrust part 2, the thrust part 2 is in the shape of a hollow Luer cone that protrudes toward the needle. In other embodiments, other shapes can be used as needed. The cone tip of the thrust part 2 also has a thrust part 2 A needle connecting portion 3 formed in the direction of the needle for the needle to be installed, the needle connecting portion 3 is tubular and communicates with the containing hole.

This embodiment also includes a putter. The putter has a shaft 4, a disc-shaped push-pull portion 5 for finger pushing and pulling is formed at the rear end of the shaft 4, and a connecting body 6 is formed at the front end of the shaft 4; There is also a plug body 7, the plug body 7 is made of rubber material, in the shape of a hollow cap, can be sleeved on the connecting body 6 and hug the connecting body 6, the outer contour size of the sleeved plug body 7 allows it to be movably plugged in In the accommodating hole of the needle cylinder, the plug body 7 is tapered toward the end of the thrust part 2, which can be better matched with the thrust part 2. In addition, the connecting body 6 is also on the end facing the needle connection part 3. Extend the locking cone rod 8 which can extend into the needle connection part 3. Correspondingly, a through hole is opened at the cone tip of the plug body 7 for the locking cone rod 8 to pass through, and the connecting body 6 is also designed as two upper and lower one. A large disc shaped and connected by the connecting post 11 to form a stepped platform. The big disc is located in the plug body 7, and the small disc is located outside the plug body 7 and has a diameter larger than the through hole on the plug body 7, thereby jamming the plug. The body 7 can better support and fix the plug body 7; the locking cone rod 8 extends upward from the small disc, and a locking edge 10 is formed on the outer peripheral wall of the locking cone rod 8. On the one hand, a locking portion 9 is formed on the inner edge of the needle connecting portion 3, which allows the locking edge 10 to be elastically deformable forwards through the locking portion 9 and then to be locked on the card when retreating. The stop portion 9, then the connecting body 6 and the plug body 7 constitute the stop plug group in this embodiment.

As shown in Figure 2, when the liquid pushing is finished, following the pushing action, the locking cone rod 8 can be pushed into the needle connecting part 3 as a whole. As shown in the figure, the locking part 9 is actually made of the needle The inner edge of the connecting portion 3 forms an annular protrusion in the direction of the central axis of the needle connecting portion 3. The inner edge of the annular protrusion forms a hollow concave Luer taper, and the large end of the Luer taper faces toward the center of the needle connecting portion 3. Inside the syringe, at the same time, the outer circumference of the locking edge 10 forms a Luer cone that matches the inner edge of the annular protrusion. The mutually matched cones make the locking edge 10 easier to pass forward. The locking part 9 can no longer be withdrawn after passing.

The shaft 4 and the connecting body 6 in this embodiment are integrally formed. At the same time, as a more preferred design, a disconnected structure is formed between the shaft 4 and the connecting body 6. When the stop in this embodiment When the plug assembly is pulled back by the push rod, the push rod disconnection structure can be disconnected. As shown in FIG. 3, the disconnection structure in this embodiment is specifically formed at the center of the front end face of the shaft 4 The connecting column 11 between the center point of the rear end surface of the connecting member and the connecting column 11 has a small diameter, which makes it easy to be shortened by external force, so the stopper set separated from the shaft 4 is left in the barrel. No matter if the user intentionally pulls the plunger to self-destruct, or someone tries to reuse the syringe to pull the plunger again to draw fluid, it can be as shown in Figure 4, the shaft 4 and The separation of the stopper group destroys both the push rod and the actual effect of the syringe. In other embodiments, other common disconnect structures can also be used, and the design in this embodiment is not the only choice of the present invention. For example, an integrally formed but smaller multi-heel connecting column 11 is also adopted, and the connecting position may not be set at the center, but at other points on the connecting surface of the shaft 4 and the connecting body 6.

With the self-destructable syringe provided by this embodiment, the user can complete the entire destruction of the syringe with one action during injection, so that the push rod can be partially reused without separating the syringe. When attempting to re-use the syringe in this embodiment, the second destruction of the syringe is passively performed, so that the shaft 4 is separated from the stopper group, the shaft 4 itself cannot be reused, and the stopper group remaining in the syringe makes The syringe cannot be reused alone, which solves the technical problem that the self-destructable syringe in the prior art can leave the syringe part undamaged after being destroyed once, causing it to be partially reused, and it can be implemented passively. The second damage avoids the problem of repeated use of the syringe.

The above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still belong to the present invention. Within the scope of technical solutions.

Claims

The self-destructable syringe can be used with a needle, and is characterized in that the syringe includes:

A needle cylinder, the needle cylinder having a cylinder body with an accommodating hole, a thrust part formed by the cylinder body in the direction of the needle, and a needle connection part formed by the thrust toward the needle for the needle to be installed, The needle connecting portion is tubular in shape and communicates with the containing hole, and also has a locking portion formed on the inner edge of the needle connecting portion;

A putter, the putter has a shaft, and a push-pull part for finger pushing and pulling is provided at the rear end of the shaft;

A stopper set, the stopper set has a disc-shaped plug body that can be movably plugged in the accommodating hole of the syringe, and a connecting body fixedly connected between the plug body and the front end of the shaft; A locking cone rod passing through the plug body extends from the end of the connecting body toward the needle connecting portion; a locking edge is formed on the outer peripheral wall of the locking cone rod, and the locking edge can be elastic forward It passes through the locking portion in a deformed manner and then is locked in the locking portion when retreating.
The self-destructable syringe according to claim 1, wherein the push rod has a disconnected structure and is connected between the shaft and the connecting body, and when the stopper set is affected by the When the push rod is pulled back, the push rod disconnection structure can be disconnected.
The self-destructable syringe according to claim 1, wherein the locking portion presents an annular protrusion formed from the inner edge of the needle connecting portion in the direction of the central axis of the needle connecting portion. The protruding inner edge forms a hollow and concave Luer taper, and the big end of the Luer taper faces the inside of the barrel.
The self-destructable syringe according to claim 3, wherein the outer periphery of the locking edge forms a Luer cone that matches the inner edge of the annular protrusion.
The self-destructable syringe according to claim 1, wherein the locking edge forms a middle part in the axial direction of the locking cone rod.
The self-destructable syringe according to claim 1, wherein the thrust part has a hollow Luer cone shape that protrudes toward the needle.
The self-destructable syringe according to claim 1, wherein the stopper body of the stopper set is tapered toward one end of the stopper portion.
The self-destructable syringe according to claim 1, wherein the plug body is in the shape of a hollow cap and is sleeved outside the connecting member.
The self-destructable syringe according to claim 2, wherein the disconnection structure is a pull-off connecting post formed between the shaft and the connecting member.
The self-destructable syringe according to claim 9, wherein the number of the connecting column is one, which is formed between the center of the front end surface of the shaft and the center point of the rear end surface of the connecting member.