CN219127746U - Disposable medical injector - Google Patents

Abstract

The utility model relates to the technical field of syringes, in particular to a disposable medical syringe which comprises a syringe body, wherein the syringe body comprises a syringe, a piston and a push rod, a working groove is arranged at the bottom end of the syringe, the piston is arranged in the working groove in a sliding manner, a needle head is arranged at the top end of the syringe, the push rod is arranged at the bottom end of the piston, a self-locking device is arranged at the bottom end of the syringe body, the self-locking device comprises a fixed column, a fixed ring, a limiting block, a limiting plate and a limiting spring, the fixed ring is arranged at the bottom end of the syringe, the fixed column is arranged at the bottom end of the side wall of the working groove, the fixed column is matched with the inner wall of the fixed ring, a limiting cavity is arranged in the fixed column, limiting holes are respectively arranged at the left side and the right side of the limiting cavity, the limiting plate is respectively arranged at the left side and the right side of the limiting cavity in a sliding manner, and an operator absorbs and injects liquid medicine through the movement of the piston.

Description

Disposable medical injector

Technical Field

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

Background

The disposable medical injector is made of high molecular polypropylene material, and is divided into three parts and two parts, the three parts are core bar, rubber plug, three parts of outer sleeve, injection needle and outer sleeve, the two parts are core bar, outer sleeve, injection needle and outer sleeve, the disposable medical injector is widely used in medical technical field, the annual usage amount is huge, the injector is to inject medicine into human body directly, in order to prevent medicine cross contamination and bacterial and virus cross infection caused by repeated use of the injector, therefore, the disposable injector is used, the existing disposable medical injector has the functions of injection, blood sampling and blood collection, etc., and the multifunction of the disposable medical injector is embodied.

However, the existing disposable medical injector is inconvenient to destroy directly, in actual use, the disposable medical injector after use is generally put at a designated position for centralized treatment, but the disposable medical injector is often reused by people and even illegally collected and recovered by illegal personnel, and flows into a hospital again through an abnormal channel, so that huge potential threats are caused to normal medical order and physical health of people, and the use requirement cannot be met.

Disclosure of Invention

(one) solving the technical problems

In view of the shortcomings of the prior art, the present utility model provides a disposable medical injector.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a disposable medical injector, includes the syringe body, the syringe body includes cylinder, piston and push rod, the cylinder bottom sets up the working groove, the sliding of working inslot sets up the piston, the cylinder is located the working groove top and sets up the syringe needle, the piston bottom sets up the push rod, the syringe body bottom sets up self-locking device, self-locking device includes fixed column, solid fixed ring, stopper, limiting plate and spacing spring, the cylinder is located working groove lateral wall bottom and sets up solid fixed ring, the push rod bottom sets up the fixed column, fixed column and solid fixed ring inner wall looks adaptation, the built-in spacing cavity of fixed column, spacing cavity left and right sides sets up the spacing hole respectively, the limiting plate is slided respectively to the spacing cavity left and right sides, set up spacing spring between the limiting plate, spacing spring one end sets up the stopper is kept away from to the limiting plate one end, limiting plate one end is kept away from to the spacing hole and is stretched out the fixed column, the stopper top sets up to the inclined plane, gu fixed ring inner wall bottom corresponds the position with the stopper and sets up first spacing groove, first spacing groove one side wall sets up the second spacing groove, first spacing groove and second arc-shaped groove and first spacing groove and first limit groove and second arc-shaped phase groove and first end are kept away from.

In order to prevent the piston from being separated from the needle cylinder, the utility model is improved in that the size of the inner wall of the fixed ring is smaller than that of the inner wall of the working groove.

In order to facilitate the movement of the piston by the push rod and thus the sucking or injecting of the liquid medicine, the utility model is improved in that the bottom end of the fixing column is provided with a push plate.

In order to facilitate the improvement of the sealing performance between the piston and the side wall of the working groove, the utility model is improved in that sealing rings are uniformly distributed on the side wall of the piston.

In order to facilitate the observation of the amount of the injector body for sucking or injecting the liquid medicine, the utility model is improved in that the side wall of the needle cylinder is provided with scale marks.

In order to facilitate the improvement of the use strength of the piston and prevent the piston from being damaged, the utility model improves that the piston is made of rubber.

(III) beneficial effects

Compared with the prior art, the utility model provides a disposable medical injector, which has the following beneficial effects:

in the disposable medical syringe, an operator sucks and injects a medical fluid by moving a piston. Through self-locking device's setting, operating personnel promotes the push rod, thereby it is close to each other to drive the stopper through the extrusion of first spacing groove tank bottom to stopper top inclined plane, thereby make the stopper stretch into first spacing inslot, afterwards operating personnel control push rod rotates, thereby drive the stopper through the fixed column and stretch into the second spacing inslot, in the rotation in-process, when stopper and third spacing inslot align, the stopper stretches into the third spacing inslot under limit spring's effect, thereby carry out spacingly through third spacing groove lateral wall and stopper, thereby make the stopper fix in the fixed ring, thereby accomplish the auto-lock to fixed column and fixed ring, prevent syringe body secondary use. Through the setting of sealing washer, be convenient for promote sealing performance between piston and the working groove lateral wall, prevent the weeping.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure of the present utility model at A in FIG. 1;

FIG. 3 is a schematic perspective view of the syringe of the present utility model;

in the figure: 1. a needle cylinder; 2. a piston; 3. a push rod; 4. a needle; 5. fixing the column; 6. a fixing ring; 7. a limiting block; 8. a limiting plate; 9. a limit spring; 10. a first limit groove; 11. the second limit groove; 12. a third limit groove; 13. a push plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, a disposable medical injector comprises an injector body, the injector body comprises a needle cylinder 1, a piston 2 and a push rod 3, a working groove is arranged at the bottom end of the needle cylinder 1, the piston 2 is slidingly arranged in the working groove, the needle cylinder 1 is arranged at the top end of the working groove, a needle head 4 is arranged at the bottom end of the piston 2, the push rod 3 is arranged at the bottom end of the injector body, a self-locking device is arranged at the bottom end of the injector body, the self-locking device comprises a fixed column 5, a fixed ring 6, a limiting block 7, a limiting plate 8 and a limiting spring 9, the needle cylinder 1 is arranged at the bottom end of the side wall of the working groove, the fixed column 5 is matched with the inner wall of the fixed ring 6, a limiting cavity is arranged in the fixed column 5, limiting holes are respectively arranged at the left side and the right side of the limiting cavity, the limiting plate 8 is slidingly arranged at the left side and the right side of the limiting cavity respectively, a limit spring 9 is arranged between the limit plates 8, a limit block 7 is arranged at one end, far away from the limit spring 9, of the limit plate 8, one end, far away from the limit plate 8, of the limit block 7 penetrates through the limit hole to extend out of the fixed column 5, the top end of the limit block 7 is provided with an inclined plane, a first limit groove 10 is arranged at the position corresponding to the limit block 7 at the bottom end of the inner wall of the fixed ring 6, an arc-shaped second limit groove 11 is arranged at the side wall of one symmetrical side of the first limit groove 10, a third limit groove 12 is arranged at one end, far away from the first limit groove 10, of the bottom of the second limit groove 11, the first limit groove 10 and the second limit groove 11 penetrate through the inner wall of the fixed ring 6, the first limit groove 10, the second limit groove 11 and the third limit groove 12 are respectively matched with the limit block 7, and when in use, an operator drives the movement of the piston 2 through the push rod 3 to suck and inject liquid medicine, after the injection is finished, an operator pushes the push rod 3, thereby the limit block 7 is driven to be close to each other through the extrusion of the inclined plane at the top end of the limit block 7 at the bottom of the first limit groove 10, so that the limit block 7 stretches into the first limit groove 10, then the operator controls the push rod 3 to rotate, thereby the limit block 7 is driven to stretch into the second limit groove 11 through the fixing column 5, in the rotating process, when the limit block 7 is aligned with the third limit groove 12, the limit block 7 stretches into the third limit groove 12 under the action of the limit spring 9, thereby the limit block 7 is limited through the side wall of the third limit groove 12 and the limit block 7, so that the limit block 7 is fixed in the fixing ring 6, thereby the self-locking of the fixing column 5 and the fixing ring 6 is completed, and the syringe body is prevented from being used secondarily.

In order to solve the problem that the piston 2 is separated from the syringe 1 during the use process, the inner wall size of the fixed ring 6 is smaller than the inner wall size of the working groove, so that the piston 2 is prevented from being separated from the syringe 1.

The push plate 13 is arranged at the bottom end of the fixed column 5, so that the piston 2 is conveniently controlled to move through the push rod 3, and the liquid medicine is conveniently sucked or injected.

In order to solve the sealing problem between the piston 2 and the side wall of the working groove, and then prevent leakage, sealing rings are uniformly distributed on the side wall of the piston 2, so that the sealing performance between the piston 2 and the side wall of the working groove is convenient to improve.

The side wall of the needle cylinder 1 is provided with scale marks, so that the quantity of the injector body for sucking or injecting the liquid medicine can be conveniently observed.

In order to solve the problem that the piston 2 is damaged in the use process, the piston 2 is made of rubber, so that the use strength of the piston 2 is improved, and the piston 2 is prevented from being damaged.

In the description herein, it should be noted that the terms "coupled," "connected," and "connected," should be construed broadly, and may be either permanently connected, detachably connected, or integrally connected, for example, unless otherwise specifically indicated and defined; the connection may be mechanical connection, electrical connection, direct connection, or indirect connection via an intermediary. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In this description, it should be noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A disposable medical injector comprising an injector body, characterized in that: the injector body comprises a needle cylinder (1), a piston (2) and a push rod (3), wherein the bottom end of the needle cylinder (1) is provided with a working groove, the piston (2) is arranged in the working groove in a sliding manner, the needle cylinder (1) is arranged at the top end of the working groove, the bottom end of the piston (2) is provided with the push rod (3), the bottom end of the injector body is provided with a self-locking device, the self-locking device comprises a fixed column (5), a fixed ring (6), a limiting block (7), a limiting plate (8) and a limiting spring (9), the needle cylinder (1) is arranged at the bottom end of the side wall of the working groove, the bottom end of the push rod (3) is provided with a fixed column (5), the fixed column (5) is matched with the inner wall of the fixed ring (6), a limiting cavity is arranged in the fixed column (5), limiting holes are respectively arranged at the left side and the right side of the limiting cavity, the limiting plate (8) is respectively arranged at the left side and the right side of the limiting cavity in a sliding manner, the limiting spring (9) is arranged between the limiting plate (8), the limiting plate (8) is far away from one end of the limiting spring (9), the limiting plate (7) and one end of the limiting plate (7) is arranged to extend out of the limiting block (7) through the limiting block (7), the fixed ring (6) inner wall bottom corresponds the position with stopper (7) and sets up first spacing groove (10), first spacing groove (10) symmetry one side lateral wall sets up curved second spacing groove (11), first spacing groove (10) one end is kept away from to second spacing groove (11) tank bottom sets up third spacing groove (12), first spacing groove (10) and second spacing groove (11) run through fixed ring (6) inner wall, first spacing groove (10), second spacing groove (11) and third spacing groove (12) respectively with stopper (7) looks adaptation.

2. A disposable medical injector according to claim 1, wherein: the inner wall size of the fixed ring (6) is smaller than the inner wall size of the working groove.

3. A disposable medical injector according to claim 2, wherein: the bottom end of the fixed column (5) is provided with a push plate (13).

4. A disposable medical injector according to claim 3, wherein: sealing rings are uniformly distributed on the side wall of the piston (2).

5. A disposable medical injector according to claim 4, wherein: graduation lines are arranged on the side wall of the needle cylinder (1).

6. A disposable medical injector according to claim 5, wherein: the piston (2) is made of rubber.

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