CN219375714U - Injection syringe - Google Patents

Abstract

The utility model relates to the technical field of syringes, in particular to a syringe, wherein a positioning block is arranged at the top of a needle tube body, a positioning rod is arranged at the lower end of a pressing plate, the positioning rod is positioned above the positioning block, a cavity and a positioning groove are arranged in the positioning block, the cavity is positioned above the positioning groove, a clamping groove is arranged on the inner wall of the positioning groove, the positioning rod penetrates through the cavity and is inserted into the positioning groove, after the injection of the structure is finished, the bottom end of the positioning rod contacts with the bottom end of the positioning groove, a clamping block can enter the inside of the clamping groove, and the positioning rod can be provided with a limiting effect in the positioning groove through the mutual matching of the clamping block and the clamping groove, so that the positioning rod is fixed in the positioning groove, at the moment, the push rod and the pressing plate are fixed, and at the moment, the push rod cannot be pulled, and the structure can be prevented from being reused.

Description

Injection syringe

Technical Field

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

Background

As is well known, a medical sterile syringe commonly used in the medical field basically consists of an outer sleeve, a rubber plug and a core rod. The rubber plug is sleeved on the head of the core rod to form the core rod, and the core rod is arranged in the inner cavity of the outer sleeve and is mainly used for extracting or injecting liquid by a needle.

The existing disposable injector generally needs to be destroyed after being used so as to prevent the secondary use of the disposable injector, and most of the existing injector breaks off the push rod after being used so as to achieve the aim of destroying the injector.

Disclosure of Invention

(one) solving the technical problems

In view of the shortcomings of the prior art, the present utility model provides an injector.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an injector, includes the needle tubing body, the inside of needle tubing body is equipped with the chock plug, the upper end of chock plug is equipped with the push rod, the top of push rod is equipped with presses the board, the top symmetry of needle tubing body sets up two recesses, the inside of recess is equipped with the fixed block, the inboard of fixed block is equipped with the spacing groove, the symmetry sets up two stoppers on the outer wall of push rod, stopper and spacing groove mutually support, the top of needle tubing body is equipped with the locating piece, the lower extreme of pressing the board is equipped with the locating lever, the locating lever is located the top of locating piece, the inside of locating piece is equipped with cavity and constant head tank, the cavity is located the top of constant head tank, be equipped with the draw-in groove on the inner wall of constant head tank, the locating lever runs through the cavity and inserts the inside of constant head tank, the bottom of locating lever is equipped with the side tank, the inside of side tank is equipped with the spring, the one end of spring is fixed in the inside of side tank, the other end of spring is equipped with the fixture block, fixture block and draw-in groove mutually support.

In order to improve the stability of the structure in use, the utility model is improved in that the positioning rod is provided with a through hole, and the positioning block is provided with a inserted link penetrating through the through hole.

In order to make the fixing block firmer in the groove, the improvement of the utility model is that the lower end of the fixing block is provided with a convex block, and the groove matched with the convex block is arranged in the groove.

Further, the improvement of the utility model is that the fixing block is adhered to the inner part of the groove.

(III) beneficial effects

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

this syringe, after this structure injection finishes, the bottom of locating lever can contact the bottom of constant head tank, can make the fixture block enter into the inside of draw-in groove, through the cooperation of fixture block and draw-in groove, can provide a spacing effect for the locating lever in the inside of constant head tank, thereby make the locating lever fixed in the inside of constant head tank, push rod and the position of pressing the board just can be fixed this moment, the push rod just can not be pulled, thereby can prevent the reuse of this structure, and then realized destroying this structure, this process need not pull out the push rod and break again, just can reach the purpose of destroying, and is easy to operate, the practicality is high.

Drawings

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

FIG. 2 is a schematic diagram of the structure of the present utility model 2;

FIG. 3 is a front view of FIG. 1 of the present utility model;

FIG. 4 is a schematic view of a partial enlarged structure of the present utility model at A in FIG. 3;

in the figure: 1. a needle tube body; 2. pressing the plate; 3. a push rod; 4. a limiting block; 5. a groove; 6. a fixed block; 7. a limit groove; 8. a positioning block; 9. a positioning rod; 10. a rod; 11. a cavity; 12. a clamping block; 13. a positioning groove; 14. a clamping groove.

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. 1-4, the injector of the present utility model comprises a needle tube body 1, wherein a plug is arranged in the needle tube body 1, a push rod 3 is arranged at the upper end of the plug, a pressing plate 2 is arranged at the top end of the push rod 3, two grooves 5 are symmetrically arranged at the top of the needle tube body 1, a fixed block 6 is arranged in the grooves 5, a limit groove 7 is arranged at the inner side of the fixed block 6, two limit blocks 4 are symmetrically arranged on the outer wall of the push rod 3, the limit blocks 4 are mutually matched with the limit groove 7, a positioning block 8 is arranged at the top of the needle tube body 1, a positioning rod 9 is arranged at the lower end of the pressing plate 2, the positioning rod 9 is positioned above the positioning block 8, a cavity 11 and a positioning groove 13 are arranged in the positioning block 8, the cavity 11 is positioned above the positioning groove 13, a clamping groove 14 is arranged on the inner wall of the positioning groove 13, the locating rod 9 penetrates through the cavity 11 and is inserted into the locating groove 13, a side groove is arranged at the bottom end of the locating rod 9, a spring is arranged in the side groove, one end of the spring is fixed in the side groove, a clamping block 12 is arranged at the other end of the spring, the clamping block 12 is matched with the clamping groove 14, the clamping block 12 is of a trapezoid structure, the upper end of the clamping block is a plane, the lower end of the clamping block is an inclined plane, the push rod 3 is pulled, the plug moves upwards in the needle tube body 1 to enable the structure to extract liquid, after the liquid extraction is finished, the push rod 3 presses the pressing plate 2, the push rod 3 drives the plug to move downwards in the needle tube body 1 at the moment, so that liquid injection is realized, in the pressing process of the pressing plate 2, the limiting block 4 slides in the limiting groove 7, a guiding effect can be provided for the push rod 3 in the needle tube body 1 through the mutual matching of the limiting block 4 and the limiting groove 7, make pressing plate 2 can not rotate, after this structure will inject, the inside of cavity 11 can be inserted to locating lever 9, then continue to press pressing plate 2, can push in locating lever 9 this moment to the inside of constant head tank 13, after this structure injection is accomplished, the bottom of locating lever 9 can contact the bottom of constant head tank 13, the spring can provide an elasticity for fixture block 12 this moment, can make fixture block 12 enter into the inside of draw-in groove 14, through the mutually supporting of fixture block 12 and draw-in groove 14, can provide a spacing effect at the inside of constant head tank 13 for locating lever 9, thereby make locating lever 9 fixed at the inside of constant head tank 13, push rod 3 and pressing plate 2's position just can be fixed this moment, push rod 3 just can not be pulled, thereby can prevent the repeatedly used of this structure, and then realized destroying this structure, this process need not pull out the purpose of destroying, and is easy operation, the practicality is high.

This structure is in the in-process of transportation, in order to avoid locating lever 9 to insert the inside of constant head tank 13, be equipped with the through-hole on the locating lever 9, be equipped with the inserted bar 10 that runs through the through-hole on the locating piece 8, through the mutually supporting of inserted bar 10 and through-hole, can provide a spacing effect at the inside of cavity 11 for locating lever 9 to can prevent this structure in the in-process of transportation, locating lever 9 inserts the inside of constant head tank 13, when this structure when using, with inserted bar 10 pull out can, simple structure, convenient operation.

The fixed block 6 lacks location structure in the inside of recess 5, can make fixed block 6 in the inside of recess 5 insecure, the lower extreme of fixed block 6 is equipped with the lug, the inside of recess 5 is equipped with lug complex recess 5, fixed block 6 bonds in the inside of recess 5, through the cooperation of lug and recess 5, can provide a location structure for fixed block 6 in the inside of recess 5, makes fixed block 6 more firm in the inside of recess 5, and the mode of bonding has easy operation, advantage with low costs.

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 (4)

1. The utility model provides an injector, includes needle tubing body (1), the inside of needle tubing body (1) is equipped with the chock plug, the upper end of chock plug is equipped with push rod (3), the top of push rod (3) is equipped with presses board (2), its characterized in that: the utility model discloses a syringe, including needle tubing body (1), needle tubing body, locating piece (9), clamping groove (14) are equipped with in the top symmetry of top setting up two recess (5), the inside of recess (5) is equipped with fixed block (6), the inboard of fixed block (6) is equipped with spacing groove (7), the symmetry sets up two stopper (4) on the outer wall of push rod (3), stopper (4) and spacing groove (7) mutually support, the top of needle tubing body (1) is equipped with locating piece (8), the lower extreme of pressing board (2) is equipped with locating lever (9), locating lever (9) are located the top of locating piece (8), the inside of locating piece (8) is equipped with cavity (11) and constant head tank (13), be equipped with draw-in groove (14) on the inner wall of constant head tank (13), the inside that runs through cavity (11) and inserts constant head tank (13), the bottom of locating lever (9) is equipped with the side groove, the inside of side groove is equipped with the spring, the one end of spring is fixed in the inside of side groove, the other end of spring (12), the other end of clamping groove (12) is equipped with fixture block (12).

2. A syringe according to claim 1, wherein: the positioning rod (9) is provided with a through hole, and the positioning block (8) is provided with a inserted rod (10) penetrating through the through hole.

3. A syringe according to claim 2, wherein: the lower end of the fixed block (6) is provided with a bump, and the inside of the groove (5) is provided with a groove (5) matched with the bump.

4. A syringe according to claim 3, wherein: the fixing block (6) is adhered to the inside of the groove (5).