TW202300188A - One time self-destroying syringe - Google Patents

Abstract

Provided is a self-destructing disposable syringe. A snap-fit mechanism is provided on a side face of one end of a needle seat close to a piston; the snap-fit mechanism comprises a linkage deformation portion and a cylinder clamping portion which are oppositely arranged; the linkage deformation portion is connected to the piston in a clamped manner; and the cylinder clamping portion is connected to a clamping seat groove of a needle cylinder in a clamped manner. The clamping force of the snap-fit mechanism is evenly distributed, so that the needle seat cannot retract into the needle cylinder due to the fact that the needle seat is not tightly clamped; after injection, due to the interference between a triangular rib of the needle seat and the piston, the needle seat forms an inclined angle when retracting along with the piston, so that the syringe is prevented from being used again by a user; in addition, a pre-breaking groove is formed in a rod body; and after the syringe is used, a push rod is pulled out, and the rod body is broken when the pre-breaking groove is parallel to a retention flange, so that the syringe self-destructs. The syringe has a simple and reasonable structure, the technical effect of the self-destruction of the syringe after a single use can be achieved, and a needle is located inside the needle cylinder during self-destruction, so that environmental pollution is avoided, and medical staff or cleaners can be protected.

Description

self-destructing disposable syringe

The invention relates to the field of disposable syringes, in particular to a self-destructing disposable syringe.

Syringes are routine medical devices that need to be used frequently in medical activities. Since blood is the medium of transmission of many infectious diseases, if the same syringe is reused on different patients, it is easy to cause the spread of diseases and endanger public health. In view of this, countries all over the world have passed legislation to restrict the reuse of syringes, and classify syringes as disposable medical devices. However, because traditional disposable syringes cannot prevent people from reusing disposable syringes in order to save costs in terms of technology and structure, there are still some people who collect used discarded disposable syringes in order to seek illegal benefits. After washing and repackaging, it flows into the medical market again, laying a huge hidden danger for the spread and spread of many diseases.

At present, the syringe on the market is a kind of medical apparatus commonly used, and it comprises needle, syringe, push rod, and syringe is made up of the syringe that has aperture at the front end and the piston push rod that matches with it. When the push rod is pulled out, the liquid is sucked from the small hole at the front of the syringe, and the liquid is squeezed out when the push rod is pushed in. The process of withdrawing or injecting a fluid with a syringe and needle is called injection. A large number of syringes sold in the market and used clinically in my country are still ordinary disposable syringes. Because they do not have the function of self-destruct, they are easy to be illegally recycled and used repeatedly, resulting in cross-infection and easy transmission of diseases.

In order to solve the above-mentioned problems, an embodiment structure of the self-destructing disposable syringe of the present invention includes: a syringe and a push rod installed in the syringe, the push rod is divided into two parts, a rod head and a rod body, and the rod head The front end of the piston is covered with a piston, and the end of the piston away from the rod head is provided with a needle seat, and the side of the end of the needle seat close to the piston is provided with a buckle mechanism, and the buckle mechanism includes an interlocking deformation part arranged oppositely, and the interlocking deformation part The extension part is provided with a cartridge part.

Further, the card cylinder part is a hook structure.

Further, the syringe includes a cylinder body, the cylinder body is provided with a chamber, the extension of the chamber is provided with a seat hole, the inner wall of the seat hole is provided with a seat groove, and the cartridge part and the card The seat groove is clamped, and the outer cover of the seat hole is connected with a needle cover.

Further, the needle seat includes a seat body, a ring groove, a hook bar and a needle hole, and the seat body, a ring groove, a hook bar and a needle hole are integrally formed, and the ring groove is located between the seat body and the needle hole, and the seat body is far away from the needle hole. One end of the ring groove is provided with a hook bar, and the needle hole is used for installing a needle head.

Further, the ring groove is provided with a sealing ring, and a preferred embodiment of the sealing ring is an O-shaped rubber ring to prevent the liquid medicine from overflowing through the needle seat when the liquid medicine is squeezed.

Furthermore, the surface of the seat body is provided with two symmetrical shrinkage surfaces, and each shrinkage surface forms a hollow structure with its corresponding interlocking deformation part. The design of the hollow structure allows the interlocking deformation part to have more deformation space.

Further, the interlocking deformation part is in the shape of a convex arc sheet connected to the hook rod, and the end of the card part away from the interlocking deformation part is connected to the ring groove away from the pinhole end.

Further, the piston is provided with a socket near the needle seat. When the injection is completed, the socket is sleeved with the hook rod and a part of the interlocking deformation part. When the piston moves forward by the force of the push rod , the piston makes the interlocking deformation part compressed and elastically deformed, the hollow structure becomes smaller, the card cylinder part leaves the card seat groove of the needle cylinder and no longer engages, and the piston can drive the interlocking deformation part to move.

Further, the side of the inner shrinkage surface is provided with a seat shoulder protruding from the inner shrinkage surface, and the seat shoulder is arranged vertically to the buckle mechanism. When the piston moves forward by the force of the push rod, the interlocking deformation part compresses and elastically deforms, and the seat shoulder is It is stuck on the end face of the piston and does not enter the inside of the piston, which plays a role of limiting the needle seat.

Furthermore, there is a triangular rib between the seat shoulder on one side and the end of the needle seat away from the needle hole, and the triangular rib is set opposite to the hook rod. Since the triangular rib cannot be completely submerged in the piston, the needle seat can be retracted with the piston. An inclination angle is formed at the same time, so that the needle head is inclined on the inner wall of the syringe, and the needle head cannot move forward with the push rod, thereby preventing the user from using it again.

Further, the rod body is provided with a pre-breaking groove, and the end of the syringe away from the needle hole is provided with a retaining flange. After the syringe is used, the push rod is pulled out, and the pre-breaking groove is parallel to the retaining flange. The breaking of the rod body causes self-destruction of the syringe, thus preventing the user from using it again.

Beneficial effects of the present invention: the present invention proposes a self-destructing disposable syringe. A buckle mechanism is provided on the side of one end of the needle seat close to the piston. The clamping part and the plunger are clamped, and the clamping part is clamped with the clamping seat groove of the syringe. The clamping force of the clamping mechanism is evenly distributed, and the needle seat will not be retracted into the syringe due to the lack of clamping. When the injection is completed, due to the needle The interference between the triangular ribs of the seat and the piston makes the needle seat form an inclined angle when the piston retracts, preventing the user from using it again. At the same time, the rod body is provided with a pre-break groove. When the pre-breaking groove is parallel to the retaining flange, the rod body will be broken, resulting in the self-destruction of the syringe. The structure is simple and reasonable, and it can make the injection The device has the technical effect of self-destructing after one use, and the needle is placed inside the syringe when self-destructing, which will not cause environmental pollution and can protect medical staff or cleaners.

1: Syringe

11: cylinder body

12: Containment room

13: Mounting hole

14: Deck slot

15: needle cover

16: retention flange

2: putter

21: club head

22: rod body

23: Pre-break groove

3: Piston

31: jack

4: Needle seat

41: seat body

42: sealing ring

43: shrinking surface

44: hollow structure

45: seat shoulder

46: Triangular rib

47: ring groove

48:Hook bar

49: pinhole

5: Buckle mechanism

51: Linkage deformation part

52: Cartridge part

60: Needle

Fig. 1 is an overall structural diagram of the self-destructing disposable syringe of the present invention.

Fig. 2 is a partial structural view of the self-destructing disposable syringe of the present invention.

Fig. 3 is a structure diagram of the needle seat of the self-destruct disposable syringe of the present invention.

Fig. 4 is a structure diagram of the needle seat of the self-destruct disposable syringe of the present invention.

Figure 5 is a structural view of the self-destructing disposable syringe of the present invention before use.

Fig. 6 is a structure diagram of the self-destructing disposable syringe of the present invention after use.

The positional relationships described in the following embodiments include: up, down, left and right. Unless otherwise specified, they are all based on the directions in which the components are drawn in the drawings. The directions mentioned therein (such as up, down, left, right, front and back) are shown according to the drawings, and are used to illustrate the relative relationship (such as positional relationship, connection relationship and action relationship).

As shown in Figure 1, it is the overall structural diagram of the self-destructing disposable syringe of the present invention; as shown in Figure 2, it is a partial structural diagram of the self-destructing disposable syringe of the present invention; as shown in Figure 3 , is the structure diagram of the needle seat of the self-destructing disposable syringe of the present invention; as shown in Figure 4, it is the structure diagram of the needle seat of the self-destructing disposable syringe of the present invention; as shown in Figure 5, it is the needle seat structure diagram of the present invention The structural diagram of the self-destructing disposable syringe before use; as shown in Figure 6, it is the structural diagram of the self-destructing disposable syringe of the present invention after use.

Please refer to Figure 1, the self-destructing disposable syringe of the present invention, including a syringe 1 And the push rod 2 (see the 5th figure) that is contained in the syringe 1, the push rod 2 is divided into two parts, the rod head 21 (see the 2nd figure) and the rod body 22 (see the 1st figure), the front end of the rod head 21 The piston 3 is covered, and the end of the piston 3 away from the rod head 21 is provided with a needle seat 4, wherein the side of the end of the needle seat 4 close to the piston 3 is provided with a buckle mechanism 5, and the buckle mechanism 5 includes a correspondingly arranged interlocking deformation part 51, which The extension of the deformation part 51 is provided with a card tube part 52 (see FIG. 4 ).

Please refer to Fig. 2, the syringe 1 includes a cylinder body 11, and the cylinder body 11 is provided with a chamber 12, the extension of the chamber 12 is provided with a seat hole 13, and the inner wall of the seat hole 13 is provided with a seat groove 14, The cartridge part 52 is engaged with the cartridge groove 14, and the needle cover 15 (see Fig. 5) is connected over the seat hole 13, and the cartridge part 52 is a hook structure.

Please refer to Fig. 3, needle holder 4 includes: seat body 41, ring groove 47, hook bar 48 and pinhole 49, seat body 41, ring groove 47, hook bar 48 and pinhole 49 are integrally formed components, ring groove 47 is located between the seat body 41 and the pinhole 49, and the end of the seat body 41 away from the ring groove 47 is provided with a hook bar 48, and the pinhole 49 is used for installing the needle head 60 (seeing the 5th and 6th figures).

Ring groove 47 is provided with sealing ring 42 (see Fig. 2), and one embodiment of sealing ring 42 is an O-shaped rubber ring, which prevents liquid medicine from overflowing through needle holder 4 when squeezing liquid medicine.

Please refer to Figure 4, the surface of the seat body 41 is provided with two symmetrical retracted surfaces 43, each retracted surface 43 forms a hollow structure 44 with its corresponding interlocking deformation part 51, and the design of the hollow structure 44 makes the interlocking deformation part 51 has more room for deformation.

Wherein the interlocking deformation part 51 is in the shape of a convex arc and connected to the hook bar 48 (see Fig. 3), and the end of the card part 52 away from the interlocking deformation part 51 is connected to the end of the ring groove 47 away from the pinhole 49.

The piston 3 is provided with a socket 31 near the needle seat 4. When the injection is completed, the socket 31 is sleeved with a part of the hook rod 48 and the interlocking deformation part 51. When the piston 3 moves forward by the force of the push rod 2 (towards When moving in the direction of the needle seat 4), the piston 3 causes the interlocking deformation part 51 to compress and elastically deform, and the hollow structure 44 becomes smaller, the cartridge part 52 leaves the cartridge groove 14 of the syringe 1 and no longer engages, and the piston 3 can drive the interlocking deformation part 51 to move.

The side surface of the retracted surface 43 is provided with a seat shoulder 45 protruding from the retracted surface 43 (see Figure 3), and the seat shoulder 45 is vertically arranged with the buckle mechanism 5. , the interlocking deformation part 51 compresses and elastically deforms, and the seat shoulder 45 is stuck on the end surface of the piston 3 and does not enter the interior of the piston 3, which plays a role of limiting the needle seat 4.

The seat shoulder 45 on one side and the end of the needle hub 4 away from the needle hole 49 are provided with a triangular rib 46 (see Figure 3). Inside the piston 3, the needle seat 4 can form an inclination angle with the retraction of the piston 3, so that the needle head 60 is inclined on the inner wall of the syringe 1, and the needle head 60 cannot move forward with the push rod 2, thus preventing the use of re-use of the operator (see Figure 6).

The rod body 22 is provided with a pre-break groove 23 (see Figure 2), and the end of the syringe 1 away from the end of the needle hole 49 is provided with a retaining flange 16 (see Figure 1). When the syringe is used, the push rod 2. Pull it out, and when the pre-breaking groove 23 is parallel to the retaining flange 16, the rod body 22 will be broken (see Figure 6), which will cause the self-destruction of the syringe, thereby preventing the user from using it again.

Beneficial effects of the present invention: The present invention proposes a self-destructing disposable syringe. A buckle mechanism 5 is provided on the side of one end of the needle seat 4 close to the piston 3. The buckle mechanism 5 includes an interlocking deformation part 51 and a buckle The cylinder part 52 and the interlocking deformation part 51 can be clamped with the piston 3, and the clamping cylinder part 52 is clamped with the socket groove 14 of the needle cylinder. The clamping force of the buckle mechanism 5 is evenly distributed, and the needle holder 4 will not be caused by a loose clamp. Break away from the piston 3, when the injection is completed, since the triangular rib 46 of the needle seat 4 cannot be completely submerged in the piston 3, the needle seat 4 can form an inclination angle with the retraction of the piston 3, so that the needle head 60 is inclined at On the inner wall of the syringe 1, the needle head 60 cannot move forward with the push rod 2, thereby preventing When the user uses it again, the rod body 22 is provided with a pre-break groove 23 at the same time. After the syringe is used, the push rod 2 is pulled out, and the rod body 22 is broken when the pre-break groove 23 is parallel to the retaining flange 16 , resulting in self-destruction of the syringe, the structure is simple and reasonable, and the technical effect of making the syringe self-destruct after one use can be achieved. The needle 60 is also placed inside the syringe 1 during self-destruction, which will not cause environmental pollution and can protect medical care personnel or cleaners.

Although the present invention has been disclosed above through the above-mentioned embodiments, it is not intended to limit the present invention. Any person familiar with the similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of patent protection shall be subject to what is defined in the claims attached to this specification.

1: Syringe

16: retention flange

22: rod body

3: Piston

4: Needle seat

5: Buckle mechanism

Claims (10)

A self-destruct disposable syringe, comprising a syringe and a push rod installed in the syringe, the push rod is divided into two parts, a rod head and a rod body, the front end of the rod head is covered with a piston, on the The end of the piston away from the rod head is provided with a needle seat, and the side of the end of the needle seat close to the piston is provided with a buckle mechanism. Barrel. As for the self-destructing disposable syringe described in Claim 1, the syringe includes a cylinder body, and a housing chamber is arranged in the cylinder body, and a seat hole is provided on the extension of the chamber, and the inner wall of the seat hole is provided with There is a card seat groove, the card cylinder part is a hook structure, and the card cylinder part is engaged with the card seat groove, and a needle cover is connected to the outside of the seat mounting hole. As for the self-destructing disposable syringe described in claim 2, the needle seat includes a body, a ring groove, a hook bar and a needle hole, and the seat body, the ring groove, the hook bar and the needle hole are integrally formed, The ring groove is located between the seat body and the needle hole, a hook bar is provided on the end of the seat body away from the ring groove, and the needle hole is used for installing a needle head. As for the self-destruct disposable syringe described in claim 3, a sealing ring is arranged on the ring groove, and the sealing ring is an O-shaped rubber ring. As for the self-destructing disposable syringe described in claim 3, the surface of the seat body is provided with two symmetrical indented surfaces, and each of the indented surfaces and the corresponding interlocking deformation part form a hollow structure, and the hollowed out The design of the structure makes the interlocking deformation part have more deformation space. In the self-destructing disposable syringe described in claim 5, the interlocking deformation part is in a convex arc shape and connected to the hook rod, and the end of the cartridge part away from the interlocking deformation part is connected to the end of the ring groove away from the needle hole. As for the self-destructing disposable syringe described in claim 5, the piston is provided with a jack near the needle seat. When the injection is completed, the jack is socketed with the hook rod and a part of the interlocking deformation part. When the piston passes through When the force of the push rod moves forward, the piston makes the interlocking deformation part compressed and elastically deformed, the hollow structure becomes smaller, and the cartridge part leaves the card slot of the needle cylinder and no longer engages, and the piston can drive The interlocking deformation part moves. As for the self-destructing disposable syringe described in claim 7, a shoulder protruding from the inner constriction surface is provided on the side of the inner constriction surface, and the shoulder is arranged perpendicular to the buckle mechanism. When the piston passes through the push rod When the force moves forward, the interlocking deformation part compresses and deforms elastically, and the seat shoulder is stuck on the end surface of the piston 3 and does not enter into the piston. As for the self-destructing disposable syringe described in claim 8, a triangular rib is arranged between the seat shoulder on one side and the end of the needle seat away from the needle hole, and the triangular rib is opposite to the hook rod. Ribs cannot be completely submerged in the piston, which can make the needle seat form an inclination angle with the retraction of the piston, so that the needle is inclined on the inner wall of the syringe, and the needle cannot go along with the push rod. move forward. In the self-destructing disposable syringe described in Claim 3, a pre-break groove is provided at the rod body, and a retaining flange is provided at the end of the syringe away from the needle hole end.

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