WO2021139631A1

WO2021139631A1 - Disposable stripping-type self-destructing syringe

Info

Publication number: WO2021139631A1
Application number: PCT/CN2021/070204
Authority: WO
Inventors: 杨小英; 莫海罡
Original assignee: 湖南省绿洲惠康发展有限公司
Priority date: 2020-01-09
Filing date: 2021-01-05
Publication date: 2021-07-15
Also published as: CN111135390A

Abstract

Disclosed is a disposable stripping-type self-destructing syringe, comprising a syringe cylinder (2). A liquid outlet (5) is fixed to the bottom of the syringe cylinder (2), a core rod (3) is inserted into the syringe cylinder (2), the core rod (3) is connected to a rubber plug structure (4), the core rod (3) is detachably connected to the top end of the rubber plug structure (4), conical lock catches (1) are formed in a circumferential direction of the bottom end of the rubber plug structure (4), and two or more conical lock catches (1) are provided; a hollow gap (1-1) for separating the conical lock catches (1) is formed in the middle of the bottom end of the rubber plug structure (4); an annular clamping bulge (2-1) matching the conical lock catch (1) is formed in the liquid outlet (5); and the sum of the clamping force between the conical lock catch (1) and the annular clamping bulge (2-1) is greater than the connecting force between the core rod (3), and the rubber plug structure (4) is greater than the friction force between the rubber plug structure (4) and the syringe cylinder (2). When liquid medicine is completely injected, the rubber plug (4) and the cylinder body (2) are connected into a whole, and when the core rod (3) is pulled back, the rubber plug structure (4) is separated from the core rod (3), such that the syringe is scrapped and cannot be used again, and a self-destructing function is achieved.

Description

One-time use peel-off self-destructing syringe

Technical field

The invention relates to a disposable medical appliance, in particular to a disposable self-destructing syringe.

Background technique

Among the blood sexually transmitted diseases in the world, the most terrifying is AIDS. According to WHO (World Health Organization) survey statistics, there are more than 36 million AIDS patients in the world, which has seriously threatened the health of human beings all over the world.

There are five main transmission routes of HIV: ①Sexual transmission, the primary transmission route of the global epidemic of AIDS, including sexual contact with the genitals, anus and mouth, with an incidence of 70-80%; ②Transmission among intravenous drug users, Sharing drug injecting equipment is a stable and continuously increasing risk factor, with an incidence rate of 3-10%; ③ Spread through blood products, using whole blood, red blood cells, freshly frozen plasma and platelets provided by a single blood donor, or using blood banks The blood products produced are all likely to be infected with HIV, with an incidence rate of 3-5%; ④ mother-to-child transmission, about 30% of HIV-1 positive mothers can cause neonatal HIV-1 infection; ⑤ transmission among medical staff, The chance of getting HIV is very small, and the risk of needle stick infection is only 0.2%. Data from the US Centers for Disease Control: CDC-Transmission Risk announced the single infection rate, the single infection rate of blood transfusion was 92.5%, the single infection rate of shared needles was 0.63%, and the single infection rate of sexual intercourse was only 0.04-0.08%.

The above data shows that the sharing of injecting equipment ranks in the forefront of the transmission route of AIDS, and the culprit, cutting off the route of repeated use of injecting equipment has become an important task of human "anti-AIDS".

In order to prevent infection caused by repeated use of syringes, people have invented a variety of self-destructing syringes. Patent such as CN 201510479370.2 discloses a locking rubber plug-type self-destructing syringe, which includes a jacket, a core rod and a rubber stopper. The front end of the jacket is provided There is a taper connected with the injection needle through a thread. The feature is: an elastic snap ring with a card hole in the center is provided on the inner wall of the taper cavity of the taper, the front end of the rubber plug is assembled with the card seat, and the back end of the rubber plug is connected with After the core rod is assembled, the front convex ring of the card seat of the card seat passes forward through the hole of the elastic snap ring, and the elastic snap ring can be clamped at the inverted step of the card seat to prevent the card seat from retracting backward and return to the outer jacket. The elastic snap ring is composed of 3 to 12 single arc cards separated from each other and the same shape. The elastic snap ring acts as a one-way valve, only allowing the card seat to advance forward and not allowing the card seat to retract backward. However, the problems with this type of syringe are as follows:

1. The hospital injection of drugs is generally quantitative. When the above-mentioned self-destructing syringes are used, there is a gap between the rubber stopper and the bottom of the syringe barrel when the holder is in contact with the elastic snap ring, that is, there is no drug in the syringe. To finish the shot completely, you need to push the core rod forcefully so that the card holder overcomes the resistance of the elastic snap ring. When the medicine is finished, the card holder and the elastic snap ring jam and self-destruct, and push the core rod forcefully. It is easy to cause vibration, which will cause the injection needle to shake in the patient's body, cause the patient's pain, and may cause greater damage. If the resistance formed when the card seat and the elastic snap ring are stuck, it will inevitably lead to the card seat and the elastic card. After the ring is stuck, the resistance is greatly reduced, and it will be difficult to prevent reuse.

2. For some self-destructing syringes, although the design has made the card holder and the elastic snap ring have a greater locking force, if you pull the core rod out forcefully, you can often pull out the core rod, causing it to be pulled out. Flushing or being used by children as toys can cause infection risks.

3. Since the barrel of the existing disposable syringe is still intact, in reality some children pick it up to make water-injection toys, and even illegal traders recycle it for reuse. In order to prevent the above situation, it is necessary to prevent the syringe barrel from being recycled without damage after one use.

Summary of the invention

The purpose of the present invention is to peel off the lower plug cone of the syringe and the rubber stopper structure after the injection of the liquid medicine, and the front end hole of the rubber stopper structure and the opening on the core rod form a ventilation channel, which destroys the close performance of the syringe, and at the same time, the core rod is pulled to When the open end of the syringe barrel receives a certain resistance, the rubber stopper structure and the core rod are peeled off, so that the syringe can only be used for one time, preventing the sharing or multiple use of the syringe equipment, achieving the purpose of self-destruction after one-time use, and providing a one-time use Peel-off self-destructing syringe.

The present invention adopts the following technical solutions to achieve the purpose of the invention:

The disposable self-destructing syringe includes a syringe barrel 2, a liquid outlet 5 is fixed at the bottom of the syringe barrel 2, a core rod 3 is inserted into the syringe barrel 2, a rubber plug structure 4 is connected to the core rod 3, and the core rod 3 is connected to the glue The top end of the plug structure 4 can be detachably connected. The bottom end of the rubber plug structure 4 is formed with a tapered lock 1 in the circumferential direction. The number of the tapered locks 1 is ≥2; the middle of the bottom end of the rubber plug structure 4 forms a tapered lock 1 Spaced hollow gap 1-1; the liquid outlet 5 is formed with an annular locking projection 2-1 that matches with the conical locking buckle 1; the sum of the clamping force of the conical locking buckle 1 and the annular locking projection 2-1 >The connecting force between the core rod 3 and the rubber stopper structure 4>the frictional force between the rubber stopper structure 4 and the syringe barrel 2.

As a further improvement, the rubber stopper structure 4 includes a rubber stopper jacket 4-1, a cavity 4-2 is formed inside the rubber stopper jacket 4-1, the top of the cavity 4-2 is connected with an upper through hole 4-3, and the bottom is connected with a lower Through hole 4-4; a mounting block 4-5 is installed in the cavity 4-2; the mounting block 4-5 is connected with a taper lock 1 passing through the lower through hole 4-4 through a connecting rod 4-6; Both the through hole 4-3 and the lower through hole 4-4 are smaller than the cavity 4-2 to form an upper snap ring structure 4-7 and a lower snap ring structure 4-8, respectively.

As a further improvement, the top of the rubber plug structure 4 is protrudingly formed with a lower plug cone 1-2, and the core rod 3 is formed with an opening 3-1 which is an interference fit with the lower plug cone 1-2.

As a further improvement, the mounting block 4-5 is connected with a lower plug cone 1-2; the bottom of the core rod 3 is formed with a ring clamping plate 3-2 in the circumferential direction, and the middle of the ring clamping plate 3-2 is formed with the lower plug cone 1-2 Matching opening 3-1.

As a further improvement, the top of the tapered plate 3-2 is fixed with an elastic clamping block 3-3 that is matched with the lower plug cone 1-2, and the outer end of the elastic clamping block 3-3 is matched with the upper snap ring structure 4-7 Tapered end 3-4.

As a further improvement, the lower plug cone 1-2 and the opening 3-1 are both tapered.

As a further improvement, the rubber plug jacket 4-1 is made of rubber; the mounting block 4-5, the tapered lock buckle 1, and the lower plug cone 1-2 are integrally made of elastic plastic.

As a further improvement, there are two conical locks 1 and the two conical locks 1 are arranged opposite to each other.

As a further improvement, an avoidance gap is formed between adjacent conical lock catches 1.

In order to realize the automatic peeling function of the rubber plug and the core rod, the present invention is provided with an opening, a lower plug cone and a conical lock catch. After the locking, the lower plug cone is separated from the opening when the cone lock catch is pulled.

In order to realize the function of the tapered lock catch receiving tensile force (reaction force), the liquid outlet at the bottom of the tube is provided with an inverted horn back buckle (that is, an annular buckle), and the tapered lock buckle closely matches and buckles with the annular buckle.

In order to realize the standard negative pressure function of the syringe, the front end of the core rod is provided with an opening matched with the lower plug cone. After the lower plug cone is clamped into the opening, the core rod and the lower plug cone form a back buckle surface that integrally supports the rubber plug. Increase the negative pressure bearing capacity, so that it meets the standard requirements.

Due to the adoption of the above technical solutions, the present invention better achieves the purpose of the invention. The disposable self-destructing syringe adopts a rubber stopper structure and a core rod peeling type self-destruction, using a lower plug cone and a core rod. The opening anastomosis of the core rod and the rubber plug structure are added, so that it can not only carry the standard negative pressure test but also can be easily peeled off, realize the self-destruct function, and effectively cut off the blood disease due to sharing injection equipment or repeated use of injection equipment Way of transmission.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the rubber stopper.

Figure 2 is a schematic diagram of the overall structure of the present invention.

Fig. 3 is a schematic diagram of the structure of the core rod.

Figure 4 is a schematic diagram of the structure of the mounting block.

Figure 5 is a schematic cross-sectional view of the rubber stopper jacket.

Figure 6 is one of the structural schematic diagrams of the locking maintenance mechanism.

Detailed ways

The content of the invention will be further explained below in conjunction with the drawings:

The single-use peel-off self-destructing syringe shown in Figure 1-5 includes a syringe barrel 2, a liquid outlet 5 is fixed at the bottom of the syringe barrel 2, a core rod 3 is inserted into the syringe barrel 2, and a rubber plug is connected to the core rod 3 Structure 4, the core rod 3 is detachably connected to the top end of the rubber plug structure 4, the bottom end of the rubber plug structure 4 is circumferentially formed with tapered locks 1, the number of the tapered locks 1 is ≥2; the bottom end of the rubber plug structure 4 A hollow gap 1-1 is formed in the middle to separate the conical lock buckle 1; the liquid outlet 5 is formed with an annular locking protrusion 2-1 that is matched with the conical locking buckle 1; the conical locking buckle 1 and the annular locking projection are formed The sum of the clamping force of 2-1>the connecting force between the core rod 3 and the rubber stopper structure 4>the frictional force between the rubber stopper structure 4 and the syringe barrel 2.

The specific rubber stopper structure 4 includes a rubber stopper jacket 4-1. A cavity 4-2 is formed inside the rubber stopper jacket 4-1. The top of the cavity 4-2 is connected with an upper through hole 4-3, and the bottom is connected with a lower through hole. 4-4; The mounting block 4-5 is installed in the cavity 4-2; the mounting block 4-5 is connected with the conical lock 1 passing through the lower through hole 4-4 through the connecting rod 4-6; the upper through hole Both 4-3 and the lower through hole 4-4 are smaller than the cavity 4-2 to form an upper snap ring structure 4-7 and a lower snap ring structure 4-8, respectively.

The top of the rubber plug structure 4 is protrudingly formed with a lower plug cone 1-2, and the core rod 3 is formed with an opening 3-1 which is an interference fit with the lower plug cone 1-2.

The mounting block 4-5 is connected with the lower plug cone 1-2; the bottom of the core rod 3 is formed with a ring splint 3-2 in the circumferential direction, and the middle of the ring splint 3-2 forms an opening 3-1 that matches with the lower plug cone 1-2 .

The top of the conical plate 3-2 is fixed with an elastic clamping block 3-3 which is matched with the lower plug cone 1-2, and the outer end of the elastic clamping block 3-3 is a tapered end 3 which is matched with the upper snap ring structure 4-7. 4. Both the lower plug cone 1-2 and the opening 3-1 are tapered. The rubber plug casing 4-1 is made of rubber; the mounting block 4-5, the tapered lock 1, the lower plug cone 1-2 are made of elastic plastic in one piece.

There are two conical locks 1 and the two conical locks 1 are arranged opposite to each other. An avoidance gap is formed between adjacent conical lock catches 1.

When the present invention is used, it is clamped by the ring clamping plate 3-2 structure of the core rod 3 and the lower plug cone 1-2 of the rubber plug structure 4, and the upper clamping ring structure 4-7 is clamped by the elastic clamping block 3-3, This ensures that when the liquid medicine is sucked, the core rod 3 can pull the rubber plug structure 4 to form a negative pressure. When the liquid medicine is injected, it hits to the bottom. Due to the hollow gap 1-1, the cone lock 1 is easy to bend inward when it is resisted by the annular protrusion 2-1, which greatly reduces the need for the cone lock 1 The resistance of pushing in and out of the liquid port reduces the vibration generated by the locking of the conical lock 1 and the annular buckle 2-1 when the last liquid medicine is injected, thereby preventing the suffering of the patient caused by excessive vibration. After the liquid medicine is completely filled, the tapered lock 1 and the annular buckle 2-1 are locked, and when the core rod is pulled back, the sum of the engagement force of the tapered lock 1 and the annular buckle 2-1 is greater than the core The connecting force between the rod 3 and the rubber plug structure 4 (that is, the friction force and the clamping force of the tapered end 3-4 of the elastic clamping block 3-3), which causes the core rod 3 to break away, and the rubber plug structure 4 is left in the syringe barrel as a whole 2 to prevent it from being reused.

Example 2

On the basis of Embodiment 1, in order to increase the lockability of the conical lock, a locking maintenance mechanism is formed on the conical lock 1. The specific locking maintenance mechanism is the connecting block 4-9 which connects the top of the conical lock buckle 1 together, or as shown in Fig. 6, includes the convex buckle 4-10 on the lower side of the conical buckle 1, and the annular buckle is convex. A ring-shaped clamping strip 4-11 is formed on the protrusion of 2-1 to cooperate with the clamping protrusion 4-10.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. For those familiar with the field, it can be easily Other modifications are implemented, so without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and descriptions shown here.

Claims

The disposable self-destructing syringe includes a syringe barrel (2), a liquid outlet (5) is fixed at the bottom of the syringe barrel (2), and a core rod (3) and a core rod (3) are inserted into the syringe barrel (2) The rubber plug structure (4) is connected, and the core rod (3) is detachably connected to the top end of the rubber plug structure (4). It is characterized in that the bottom end of the rubber plug structure (4) is circumferentially formed with a tapered lock (1). ), the number of conical locks (1) is greater than or equal to 2; the middle of the bottom end of the rubber plug structure (4) forms a hollow gap (1-1) separating the conical locks (1); the liquid outlet (5) ) Is formed with an annular locking projection (2-1) that matches with the conical lock (1); the sum of the clamping force of the conical locking (1) and the annular locking projection (2-1)> the core rod (3) The connection force with the rubber stopper structure (4)>the frictional force between the rubber stopper structure (4) and the syringe barrel (2).
The disposable self-destructing syringe according to claim 1, wherein the rubber stopper structure (4) comprises a rubber stopper jacket (4-1), and the rubber stopper jacket (4-1) is formed with a shape inside. The cavity (4-2), the top of the cavity (4-2) is connected with an upper through hole (4-3), and the bottom is connected with a lower through hole (4-4); the cavity (4-2) is installed with Mounting block (4-5); Mounting block (4-5) is connected with a conical lock (1) passing through the lower through hole (4-4) through the connecting rod (4-6); the upper through hole (4- 3) and the lower through hole (4-4) are smaller than the cavity (4-2) to form the upper snap ring structure (4-7) and the lower snap ring structure (4-8); the inlet of the syringe barrel (2) A snap ring (2-1) matched with the rubber plug cover (4-1) is installed at the place.
The single-use peel-off self-destructing syringe according to claim 1, characterized in that a locking maintenance mechanism is formed on the tapered lock (1).
The single-use peel-off self-destructing syringe according to claim 2, characterized in that, the locking maintenance mechanism is a connecting block (4-9) that connects the tops of the conical lock (1) together.
The single-use peel-off self-destructing syringe according to claim 2, characterized in that, the locking maintenance mechanism comprises a convex locking projection (4-10) on the lower side of the conical locking buckle (1), an annular locking projection (2-1) The upper protrusion is formed with a wake-up card strip (4-11) matched with the card protrusion (4-10).
The single-use peel-off self-destructing syringe according to any one of claims 1-4, wherein the top of the rubber plug structure (4) is protrudingly formed with a lower plug cone (1-2), and a core rod (3). An opening (3-1) for interference fit with the lower plug cone (1-2) is formed on the ).
The single-use peel-off self-destructing syringe according to claim 1, wherein the mounting block (4-5) is connected with a lower plug cone (1-2); the bottom of the core rod (3) is convex A ring splint (3-2) is formed, and the middle of the ring splint (3-2) forms an opening (3-1) matched with the lower plug cone (1-2).
The single-use peel-off self-destructing syringe according to claim 6, characterized in that, the top of the conical plate (3-2) is fixed with an elastic clamping block (3- 3), the outer end of the elastic clamping block (3-3) is a tapered end (3-4) matched with the upper snap ring structure (4-7).
The single-use peel-off self-destructing syringe according to claim 5, wherein the lower plug cone (1-2) and the opening (3-1) are both tapered; adjacent tapered locks (1) ) There is an avoidance gap formed between.
The single-use peel-off self-destructing syringe according to claim 4, characterized in that the rubber stopper jacket (4-1) is made of rubber; the mounting block (4-5), the conical lock ( 1) The lower plug cone (1-2) is integrally made of elastic plastic; there are two conical lock catches (1), and the two conical lock catches (1) are arranged oppositely.