CN221579227U - Disposable injector with low-residue self-destruction function - Google Patents

Abstract

The utility model discloses a disposable injector with a low-residue self-destruction function, which comprises an injection cylinder, wherein the injection end of the injection cylinder is provided with a needle cylinder, the inner side of the injection cylinder is provided with a push rod assembly, the push rod assembly comprises a main push rod, one end of the main push rod extends to the outer end of the injection cylinder, the inner end of the main push rod is provided with a positioning head, a thin neck connecting rod is connected between the positioning head and the main push rod, one end of the positioning head, which faces the needle cylinder, is fixedly connected with a guide rod which can be inserted into the inner side of the needle cylinder, and the tail end of the guide rod is provided with a clamping hook.

Description

Disposable injector with low-residue self-destruction function

Technical Field

The utility model relates to the technical field of syringes, in particular to a disposable syringe with a low-residue self-destruction function.

Background

Syringes are the most common type of device in the medical field, and the process of drawing, injecting a gas or liquid with a needle is called injection; the injector consists of a needle cylinder with a small hole at the front end and a matched piston core rod, and is used for injecting a small amount of liquid or the liquid into areas inaccessible to other methods or extracting the liquid or the gas from the places, wherein the liquid or the gas is sucked from the small hole at the front end of the needle cylinder when the core rod is pulled out, and the liquid or the gas is extruded when the core rod is pushed in.

However, the conventional syringe still has the defects that the main problem is that after the injection is completed, liquid medicine or human body mixed liquid is remained between a syringe and a needle, although the residual liquid medicine of a single syringe is less, huge waste is caused after the whole medical system is involved, the residual liquid is easy to volatilize and leak in the recovery process, even the situation of being recovered by illegal personnel for secondary use is easy to cause pathogen diffusion and iatrogenic infection, and certain potential safety hazard exists; accordingly, the inventor has recognized that it is necessary to design a disposable syringe that can reduce liquid residues while having a self-destruction function after injection is completed.

Disclosure of utility model

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

Therefore, the present utility model is directed to a disposable syringe with low-residue self-destruction function, which solves the problem of the prior art that it is necessary to design a disposable syringe that can reduce the liquid residue and has self-destruction function after the injection is completed.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a disposable syringe with low residual self-destruction function, its includes the syringe, the syringe injection end has the cylinder, the syringe inboard has ejector pin subassembly, ejector pin subassembly includes the main push rod that one end extends to the syringe outer end, the inner of main push rod has the locating head, even have the thin neck connecting rod between locating head and the main push rod, the locating head is connected with the guide arm that can insert the cylinder inboard towards the one end fixed connection of cylinder, just the guide arm end has the pothook.

As an optimal scheme of the disposable injector with the low-residue self-destruction function, a piston is clamped and positioned at the outer side of the positioning head, and the piston is matched with the inner diameter of the injection cylinder.

As a preferable scheme of the disposable injector with the low-residue self-destruction function, the guide rod is of a round rod structure, and the diameter of the guide rod is smaller than the inner diameter of the needle cylinder.

As a preferable scheme of the disposable injector with the low-residue self-destruction function, at least two hooks are arranged, and the transverse maximum distance between the hooks is larger than the inner diameter of the syringe.

As a preferable scheme of the disposable injector with the low-residue self-destruction function, the outer side and the outer end of the needle cylinder are also sleeved and fixed with a needle seat, and the outer end of the needle seat is provided with a needle head.

Compared with the prior art, the utility model has the beneficial effects that: after the injection is finished, the liquid remained in the syringe can be discharged as much as possible, so that the defect that the liquid is easy to remain in the syringe is reduced as much as possible, the pathogen diffusion and the iatrogenic infection probability are reduced, meanwhile, medical staff only needs to pull the main push rod with a little force and assist in twisting, so that the thin neck connecting rod can be immediately disconnected, and the positioning head, the piston and the guide rod can be continuously left in the syringe, so that the whole syringe cannot be reused, and the self-destruction effect is achieved.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a syringe according to the present utility model;

FIG. 2 is a schematic view of the structure of the end of the syringe of the present utility model before use;

FIG. 3 is a schematic view of the structure of the end of the syringe according to the present utility model after use.

In the figure: 10. a syringe; 11. a needle cylinder; 20. a push rod assembly; 21. a main push rod; 22. a positioning head; 23. a thin neck connecting rod; 24. a guide rod; 25. a clamping hook; 30. a piston; 40. a needle seat.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.

Next, the present utility model will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1-3, a disposable syringe with low residual self-destruction function according to the present utility model includes a syringe 10, an injection end of the syringe 10 having a syringe 11, a ram assembly 20 disposed inside the syringe 10, the ram assembly 20 including a main ram 21 with one end extending to an outer end of the syringe 10, a positioning head 22 disposed at an inner end of the main ram 21, a thin neck connecting rod 23 connected between the positioning head 22 and the main ram 21, a guide rod 24 fixedly connected to an end of the positioning head 22 facing the syringe 11 and insertable inside the syringe 11, and a hook 25 disposed at an end of the guide rod 24.

The piston 30 is clamped and embedded on the outer side of the positioning head 22, the piston 30 is matched with the inner diameter of the injection cylinder 10, the guide rod 24 is of a round rod structure, the diameter of the guide rod 24 is smaller than the inner diameter of the injection cylinder 11, so that the guide rod 24 can be smoothly inserted into the injection cylinder 11 and can extrude and discharge residual liquid in the injection cylinder 11, at least two clamping hooks 25 are arranged, the transverse maximum distance between the clamping hooks 25 is larger than the inner diameter of the injection cylinder 11, and the ejector rod assembly 20 is made of plastic materials, so that the clamping hooks 25 can smoothly enter the tail end of the injection cylinder 11 through the injection cylinder 11.

The needle seat 40 is sleeved and fixed on the outer side and the outer end of the needle cylinder 11, and the needle is arranged on the outer end of the needle seat 40, when the syringe is used, the main push rod 21 is pressed, and the positioning head 22, the piston 30 and the guide rod 24 are driven to synchronously advance, so that liquid in the syringe 10 is extruded to the needle cylinder 11 and the needle seat 40 through the piston 30, when the piston 30 advances to the junction of the needle cylinder 11 and the syringe 10, the guide rod 24 also enters and penetrates through the needle cylinder 11, and only liquid in the needle cylinder 11 is extruded, so that the defect that liquid is easy to remain in the syringe is reduced as much as possible, the probability of pathogen diffusion and iatrogenic infection is reduced, then the hook 25 can be quickly sprung out when entering the tail end of the needle cylinder 11, so that the guide rod 24 is blocked on the inner side of the needle cylinder 11, and at the moment, medical staff only need to pull the main push rod 21 with a little force, and assist in twisting, so that the thin neck connecting rod 23 can be immediately disconnected, and the positioning head 22, the piston 30 and the guide rod 24 can be kept in the syringe 10, so that the whole syringe cannot be reused, and the effect of self-destruction is achieved.

In summary, in the disposable injector with the low residual self-destruction function of the present embodiment, by pressing the main push rod 21 and driving the positioning head 22, the piston 30 and the guide rod 24 to advance synchronously, the liquid in the syringe 10 is extruded to the syringe 11 and the needle seat 40 by the piston 30, when the piston 30 moves to the junction between the syringe 11 and the syringe 10, the guide rod 24 also enters and penetrates the syringe 11, and only the liquid in the syringe 11 is extruded, thereby reducing the defect of easy residual liquid in the injector as much as possible, then the hook 25 can be sprung out rapidly when entering the end of the syringe 11, thereby blocking the guide rod 24 inside the syringe 11, at this time, the medical staff only needs to pull the main push rod 21 with a little force and assist in twisting, so that the thin neck connecting rod 23 is cut off immediately, and the positioning head 22, the piston 30 and the guide rod 24 remain inside the syringe 10, so that the whole injector cannot be reused, and the self-destruction effect is achieved.

Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (5)

1. The utility model provides a disposable syringe with low residual self-destruction function, its characterized in that includes syringe (10), syringe (10) injection end has cylinder (11), syringe (10) inboard has ejector pin subassembly (20), ejector pin subassembly (20) are including one end extension to main push rod (21) of syringe (10) outer end, the inner of main push rod (21) has locating head (22), even have thin neck connecting rod (23) between locating head (22) and main push rod (21), locating head (22) are towards the inboard guide arm (24) of cylinder (11) of one end fixed connection that cylinder (11) was inserted, just guide arm (24) end has pothook (25).

2. A disposable syringe with low residual self-destruction function according to claim 1, characterized in that: a piston (30) is clamped and positioned at the outer side of the positioning head (22), and the piston (30) is matched with the inner diameter of the injection cylinder (10).

3. A disposable syringe with low residual self-destruction function according to claim 1, characterized in that: the guide rod (24) is of a round rod structure, and the diameter of the guide rod (24) is smaller than the inner diameter of the needle cylinder (11).

4. A disposable syringe with low residual self-destruction function according to claim 1, characterized in that: at least two hooks (25) are arranged, and the transverse maximum distance between the hooks (25) is larger than the inner diameter of the needle cylinder (11).

5. A disposable syringe with low residual self-destruction function according to claim 1, characterized in that: the outer side and the outer end of the needle cylinder (11) are also sleeved and fixed with a needle seat (40), and the outer end of the needle seat (40) is provided with a needle head.