CN209848021U - a disposable syringe - Google Patents

Abstract

The utility model discloses a disposable syringe, including cylinder and push rod, the push rod front end is equipped with the plunger admittedly, and its rear end is equipped with admittedly and pushes away the handle, and the plunger slip cap is established at the cylinder inner chamber, and the cylinder front end is equipped with the cylinder mouth with cylinder inner chamber intercommunication, and plunger front end swing joint has the portion of blockking, and the portion of blockking is including blocking the pole, blocks the pole front end and is equipped with the boss, and the inner chamber of cylinder mouth is equipped with the holding chamber corresponding with the boss, and holding chamber inner edge evenly is provided with a plurality of non return shell fragments that extend to the exit direction of cylinder mouth. The utility model has the characteristics of simple structure, the simple operation, economy is suitable for, self-destruction convenient and fast, labour saving and time saving.

Description

a disposable syringe

technical field

The utility model relates to the field of medical technology, in particular to a disposable syringe.

Background technique

Disposable syringes are essential devices in the medical industry and are mainly used to inject liquid medicine into the human body. In order to avoid cross-infection caused by pathogens in different body fluids, disposable syringes are usually used at present.

However, if disposable syringes are reused after use, there will be great safety hazards, and even the possibility of transmitting diseases through blood; in order to prevent the reuse of disposable syringes, it is necessary to destroy them after use. Eliminate potential safety hazards.

Utility model content

The purpose of the utility model is to provide a disposable syringe, which has the advantages of simple structure, convenient operation and economical application.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

The utility model is a disposable syringe, which comprises a syringe and a push rod. A plunger is fixed at the front end of the push rod, and a push handle is fixed at the rear end of the push rod. The plunger is slidably set in the inner cavity of the syringe. The front end of the syringe is provided with a nozzle connected to the inner cavity of the syringe, the front end of the plunger is movably connected with a blocking part, the blocking part includes a blocking rod, and a boss is provided at the front end of the blocking rod. mouth

The inner cavity of the inner cavity is provided with a corresponding accommodating cavity corresponding to the boss, and the inner edge of the accommodating cavity is uniformly provided with a plurality of non-return elastic pieces extending toward the outlet of the syringe nozzle.

The disposable syringe above, wherein, the plunger is provided with a mounting hole along its axial direction, and the blocking rod is cylindrical and embedded in the mounting hole.

The above-mentioned disposable syringe, wherein, the plunger is provided with a spherical accommodation cavity along its axial direction, and the rear end of the blocking rod is provided with a connecting ball adapted to the accommodation cavity, and the depth of the accommodation cavity is greater than that of the accommodation cavity of the radius.

The above-mentioned disposable syringe, wherein, the boss is columnar or conical.

In the above-mentioned disposable syringe, wherein, the inner diameter of the accommodating cavity corresponds to the outer diameter of the boss and is larger than the inner diameter of the nozzle of the syringe.

The above-mentioned disposable syringe, wherein, the blocking part is made of silicone rubber or PVC.

In the above-mentioned disposable syringe, the cross-section of the push rod is cross-shaped.

In the above-mentioned disposable syringe, there are 4-8 pieces of said non-return elastic pieces.

In the above-mentioned disposable syringe, there are four anti-return elastic pieces.

To sum up, the utility model has the following beneficial effects: simple structure, convenient operation, economical and applicable, convenient and quick self-destruction, saving time and effort.

Description of drawings

Fig. 1 is the schematic sectional view of embodiment 1 syringe;

Fig. 2 is the schematic sectional view of embodiment 1 syringe after use;

Fig. 3 is an enlarged view of A of Fig. 2;

Fig. 4 is the schematic sectional view of embodiment 2 syringe;

Fig. 5 is the schematic sectional view of embodiment 2 syringe after use;

Fig. 6 is an enlarged view of B of Fig. 5;

Fig. 7 is a C-C sectional view of Fig. 5 .

In the figure, reference signs:

1. Syringe; 2. Push rod; 21. Plunger; 22. Push handle; 23. Mounting hole; 24. Accommodating cavity; 3. Syringe nozzle; 31. Accommodating cavity; 32. Non-return shrapnel; 4. Blocking part; 41, blocking rod; 42, boss; 43, connecting ball.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top "Face", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Embodiment 1: As shown in Figures 1, 2, 3 and 7, a disposable syringe of the present invention includes a syringe 1 and a push rod 2, the front end of the push rod 2 is fixed with a plunger 21, and the rear of the plunger 21 The end is fixed with a push handle 22, the plunger 21 is slidably sleeved in the inner cavity of the syringe 1, the front end of the syringe 1 is provided with a nozzle 3 communicating with the inner cavity of the syringe 1, and the front end of the plunger 21 is movably connected with a blocking part 4 , the blocking part 4 includes a blocking rod 41, the front end of the blocking rod 41 is provided with a boss 42, the inner cavity of the syringe nozzle 3 is provided with a corresponding accommodating chamber 31 corresponding to the boss 42, and the inner edge of the accommodating chamber 31 is uniformly provided with a plurality of There are 4-8 anti-return elastic pieces 32 extending toward the exit direction of the syringe nozzle 3, and there are four anti-return elastic pieces 32 in this embodiment.

The plunger 21 of this embodiment is provided with a mounting hole 23 along its axial direction, and the blocking rod 41 is cylindrical and embedded in the mounting hole 23 . The blocking rod 41 of this embodiment is closely matched with the mounting hole 23, which ensures that the blocking rod 41 does not disengage from the mounting hole 23 when the syringe is used normally, and can be disengaged from the mounting hole 23 when the blocking rod 41 is pulled.

The boss 42 is preferably columnar, and the inner diameter of the accommodating cavity 31 corresponds to the outer diameter of the boss 42 and is larger than the inner diameter of the syringe nozzle 3 . When using a syringe, the push rod 2 is pushed forward, and the liquid in the syringe 1 is ejected from the nozzle 3 of the syringe. When the push rod 2 is pushed to the bottom of the syringe 1, the plunger 21 at the front end of the push rod 2 is against the syringe 1 At the bottom of the inner cavity of the blocking part 4, the boss 42 at the front end of the blocking part 4 squeezes the non-return elastic sheet 32, and the boss 42 is pushed into the accommodating cavity 31, and the front part of the boss 42 blocks the inner cavity of the syringe nozzle 3, and the boss 42 The rear part of 42 abuts against the anti-return elastic piece 32 , and the boss 42 is restricted in the accommodating cavity 31 . The accommodating cavity 31 in this embodiment is slightly larger than the outer diameter of the boss 42 and larger than the inner cavity diameter of the syringe nozzle 3, so that the boss 42 can enter the accommodating cavity 31 without getting out of the syringe nozzle 3. The inner chamber goes out, and can only be limited in the accommodating chamber 31.

In this embodiment, the blocking rod 41 and the boss 42 are integrally formed, and the blocking part 4 is made of silicone rubber or PVC to achieve the purpose of sanitation and safety.

In order to save material and reduce the weight of the syringe, the push rod 2 preferably adopts a cross-shaped structure.

Embodiment 2: As shown in Figures 4, 5, 6 and 7, the difference between this embodiment and Embodiment 1 is that the plunger 21 of this embodiment is provided with a spherical accommodating cavity 24 along its axial direction, and the rear end of the blocking rod 41 is provided with The connecting ball 43 matched with the receiving cavity 24 is integrally formed with the blocking rod 41 in this embodiment, and the depth of the receiving cavity 24 is greater than the radius of the receiving cavity 24 .

In this embodiment, the depth of the receiving cavity 24 is slightly larger than the radius of the receiving cavity 24, so that the connecting ball 43 can be embedded in the receiving cavity 24, and can be separated from the receiving cavity 24 when the connecting ball 43 is subjected to an external force. The boss 42 of this embodiment is preferably conical, and the conical boss 42 is easier to be pushed into the accommodating cavity 31 .

The specific working process of the utility model is as follows: as shown in Figures 2 and 5, the injection medicine is drawn into the syringe 1 through the push rod 2, and when the injection is completed, the blocking part 4 at the front end of the plunger 21 is pushed into the accommodating cavity 31, that is, the front end boss 42 of the blocking portion 4 squeezes the non-return elastic sheet 32, and the boss 42 enters the accommodating chamber 31, and the front part of the boss 42 blocks the inner cavity of the syringe nozzle 3, and the rear part of the boss 42 and The non-return elastic piece 32 abuts, the boss 42 is limited in the accommodating cavity 31, and then the push rod 2 is pulled backward. Since the plunger 21 is movably connected with the blocking part 4, the push rod 2 is pulled backward to make the plunger 21 is separated from the blocking part 4, and the blocking part 4 is restricted in the accommodating cavity 31 by the anti-return elastic sheet 32, and the boss 42 at the front end of the blocking part 4 blocks the inner cavity of the syringe nozzle 3. The above operation makes the disposable syringe It cannot be used again, and the purpose of self-destruction of the syringe is achieved. The disposable syringe does not need to perform additional destruction work, saves manpower, and has good social and economic benefits.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (9)

1. The utility model provides a disposable syringe, includes cylinder and push rod, the push rod front end is equipped with the plunger admittedly, and its rear end is equipped with admittedly and pushes away the handle, the plunger slides the cover and establishes in the cylinder inner chamber, the cylinder front end is equipped with the syringe mouth with cylinder inner chamber intercommunication, its characterized in that: plunger front end swing joint has the portion of blockking, the portion of blockking includes blocks the pole, block the pole front end and be equipped with the boss, the inner chamber of syringe mouth is equipped with the holding chamber corresponding with the boss, holding chamber inner edge evenly is provided with a plurality of non return shell fragments that extend to the export direction of syringe mouth.

2. The single use syringe of claim 1, wherein: the plunger is provided with an installation hole along the axial direction, and the blocking rod is columnar and is embedded in the installation hole.

3. The single use syringe of claim 1, wherein: the plunger is provided with a spherical accommodating cavity along the axial direction of the plunger, the rear end of the blocking rod is provided with a connecting ball matched with the accommodating cavity, and the depth of the accommodating cavity is greater than the radius of the accommodating cavity.

4. The single use syringe of claim 1, wherein: the boss is columnar or conical.

5. The single use syringe of claim 4, wherein: the inner diameter of the accommodating cavity corresponds to the outer diameter of the boss and is larger than the diameter of the inner cavity of the needle cylinder nozzle.

6. The single use syringe of claim 1, wherein: the blocking part is made of silicon rubber or PVC materials.

7. The single use syringe of claim 1, wherein: the cross section of the push rod is in a cross shape.

8. The single use syringe of claim 1, wherein: 4-8 check shrapnels are provided.

9. The single use syringe of claim 8, wherein: the number of the check shrapnels is 4.