CN219043013U

CN219043013U - Injector capable of preventing secondary use

Info

Publication number: CN219043013U
Application number: CN202222694583.5U
Authority: CN
Inventors: 王李利
Original assignee: Zhejiang Xiaoshan Hospital
Current assignee: Zhejiang Xiaoshan Hospital
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-05-19
Anticipated expiration: 2032-10-13

Abstract

The utility model discloses a syringe capable of preventing secondary use, which comprises an outer barrel, wherein a piston is arranged on the inner wall of the outer barrel in an inserted manner, a push rod is arranged at the bottom end of the piston, an auxiliary mechanism is arranged on the inner wall of the outer barrel, the auxiliary mechanism comprises a first fixing ring and a second fixing ring, the first fixing ring is fixedly sleeved on the outer wall of the push rod, a plurality of clamping grooves are formed in the outer wall of the first fixing ring, blocking blocks are arranged in the clamping grooves, the second fixing ring is fixedly connected with the inner wall of the outer barrel, a plurality of clamping blocks are fixedly connected with the inner wall of the second fixing ring, a shrinkage groove is formed in the bottom end of the second fixing ring, and a limiting structure is arranged between the clamping blocks and the clamping grooves. According to the utility model, by means of the arrangement of the first fixing ring, the second fixing ring, the clamping block and the clamping groove, after the clamping block is clamped into the clamping groove, the piston can completely extrude the liquid medicine, and meanwhile, the first fixing ring and the second fixing ring are mutually positioned, so that the push rod cannot move, the syringe is prevented from being used for the second time, and the phenomenon of cross infection can be reduced.

Description

Injector capable of preventing secondary use

Technical Field

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

Background

The syringe is a device which is matched with a needle to inject liquid medicine into a patient, the existing syringe is composed of a basic outer cylinder, a piston and a push rod, the structure is simple, the syringe which is arranged can be repeatedly used, the phenomenon of secondary use of the used syringe is caused in the use process, and the phenomenon of cross infection is very easy to occur.

Disclosure of Invention

The present utility model is directed to a syringe capable of preventing secondary use, and solves the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a syringe that prevents secondary use, includes the urceolus, the inner wall interlude of urceolus is provided with the piston, the bottom of piston is provided with the push rod, the inner wall of urceolus is provided with assist mechanism, assist mechanism includes first solid fixed ring and second solid fixed ring, first solid fixed ring is fixed to be cup jointed in the outer wall of push rod, a plurality of draw-in grooves have been seted up to the outer wall of first solid fixed ring, and is a plurality of the inside of draw-in groove all is provided with the sprue, second solid fixed ring fixedly connected with is in the inner wall of urceolus, the inner wall fixedly connected with a plurality of fixture blocks of second solid fixed ring, the shrink groove has been seted up to the bottom of second solid fixed ring, be provided with limit structure between fixture block and the draw-in groove.

Preferably, the limit structure comprises a first tangent plane and a second tangent plane, the first tangent plane is arranged at the top end of the clamping block, and the second tangent plane is arranged at the top end of the inner wall of the clamping groove.

Preferably, a clamping hole is formed in one side of the blocking block, and a chamfer is formed in the end portion of the clamping block.

Preferably, the outer wall fixedly connected with two spacing bars of push rod, the inner wall fixedly connected with third solid fixed ring of urceolus, two spacing grooves have been seted up to the inner wall of third solid fixed ring, two the outer wall of spacing bar respectively with the inner wall activity interlude connection of two spacing grooves.

Preferably, the bottom of the outer wall of the outer cylinder is fixedly connected with two pull plates, the bottom of the push rod is fixedly connected with a pressing plate, and the top of the outer cylinder is fixedly connected with a nipple.

Preferably, the top of push rod fixedly connected with connecting plate, the top fixedly connected with locating piece of connecting plate, the constant head tank has been seted up to the bottom of piston, the outer wall of locating piece and the inner wall activity interlude of constant head tank are connected.

The utility model has the technical effects and advantages that:

(1) According to the utility model, by means of the arrangement of the first fixing ring, the second fixing ring, the clamping block and the clamping groove, after the clamping block is clamped into the clamping groove, the piston can completely extrude the liquid medicine, and meanwhile, the first fixing ring and the second fixing ring are mutually positioned, so that the push rod cannot move, the syringe is prevented from being used for the second time, and the phenomenon of cross infection can be reduced;

(2) According to the utility model, the third fixing ring and the two limiting strips are arranged, and the limiting strips are limited through the limiting grooves in the third fixing ring, so that the push rod cannot rotate in the moving process, and the clamping block can be stably clamped into the clamping groove.

Drawings

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

Fig. 2 is a schematic diagram of the front cross-sectional structure of the present utility model.

Fig. 3 is a schematic view of a partial enlarged structure at a of fig. 2 according to the present utility model.

Fig. 4 is a schematic view of a partial enlarged structure at B of fig. 3 according to the present utility model.

Fig. 5 is a schematic view of a partial enlarged structure at C of fig. 2 according to the present utility model.

In the figure: 11. an outer cylinder; 12. a piston; 13. a push rod; 21. a first fixing ring; 22. a clamping groove; 23. blocking; 24. a second fixing ring; 25. a shrink tank; 26. a clamping block; 31. a clamping hole; 41. a third fixing ring; 42. a limit groove; 43. a limit bar; 51. pulling a plate; 52. pressing the plate; 53. nipple; 61. a first cut surface; 62. a second cut surface; 71. a connecting plate; 72. a positioning block; 73. and a positioning 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.

The utility model provides a syringe for preventing secondary use as shown in figures 1-5, which comprises an outer barrel 11, wherein a piston 12 is inserted into the inner wall of the outer barrel 11, the bottom end of the piston 12 is provided with a push rod 13, the inner wall of the outer barrel 11 is provided with an auxiliary mechanism, the auxiliary mechanism comprises a first fixed ring 21 and a second fixed ring 24, the first fixed ring 21 is fixedly sleeved on the outer wall of the push rod 13, a plurality of clamping grooves 22 are formed on the outer wall of the first fixed ring 21, a blocking block 23 is arranged in each of the plurality of clamping grooves 22, the second fixed ring 24 is fixedly connected with the inner wall of the outer barrel 11, a plurality of clamping blocks 26 are fixedly connected with the inner wall of the second fixed ring 24, a contraction groove 25 is formed at the bottom end of the second fixed ring 24, a limiting structure is arranged between the clamping blocks 26 and the clamping grooves 22, when the syringe is used, the push rod 13 is pulled down to enable the piston 12 to move, so that the syringe can absorb liquid medicine, simultaneously, the push rod 13 can drive the first fixing ring 21 to move downwards in the process of pulling down, so that the clamping block 26 is separated from the blocking block 23, the blocking block 23 can drop from the clamping groove 22 without extrusion, meanwhile, the second fixing ring 24 elastically resets to enable the clamping block 26 to reset until the injection of the liquid medicine into a human body by a syringe is completed, a medical staff upwards moves the push rod 13 when injecting the liquid medicine into the human body by the syringe until the first fixing ring 21 contacts with the clamping block 26, the clamping block 26 can extrude the second fixing ring 24 to enable the second fixing ring 24 to shrink by the shrinkage groove 25 until the clamping block 26 is clamped into the clamping groove 22, at the moment, the clamping block 26 is stably clamped in the clamping groove 22 by the setting of the limiting mechanism, meanwhile, the piston 12 extrudes all the liquid medicine, and the push rod 13 cannot move downwards again to work, so that the syringe is prevented from being used again, the second fixing ring 24 shown in fig. 2 is a state in which the second fixing ring 24 is compressed;

the limiting structure comprises a first tangent plane 61 and a second tangent plane 62, the first tangent plane 61 is arranged at the top end of the clamping block 26, the second tangent plane 62 is arranged at the top end of the inner wall of the clamping groove 22, and the push rod 13 cannot move downwards again after the clamping block 26 is clamped into the clamping groove 22 through the arrangement of the first tangent plane 61 and the second tangent plane 62;

a clamping hole 31 is formed in one side of the blocking block 23, a chamfer is formed in the end portion of the clamping block 26, and the clamping block 26 is matched with the clamping hole 31 through the chamfer, so that the clamping block 26 can prop against the clamping hole 31 on one side of the blocking block 23, and after the blocking block 23 is extruded by the clamping block 26, the blocking block 23 cannot fall from the clamping groove 22 until the clamping block 26 is separated from the blocking block 23, and the blocking block 23 cannot automatically fall from the clamping groove 22;

the outer wall of the push rod 13 is fixedly connected with two limit strips 43, the inner wall of the outer barrel 11 is fixedly connected with a third fixed ring 41, two limit grooves 42 are formed in the inner wall of the third fixed ring 41, the outer walls of the two limit strips 43 are respectively movably connected with the inner walls of the two limit grooves 42 in a penetrating mode, the limit grooves 42 are matched with the limit strips 43, the push rod 13 cannot rotate when being lifted, and therefore the clamping blocks 26 can be stably clamped into the clamping grooves 22;

the bottom of the outer wall of the outer barrel 11 is fixedly connected with two pull plates 51, the bottom end of the push rod 13 is fixedly connected with a pressing plate 52, the top end of the outer barrel 11 is fixedly connected with a nipple 53, and the nipple 53 is a needle seat for sleeving a needle on the nipple 53 so as to match the needle with a syringe for use;

the top fixedly connected with connecting plate 71 of push rod 13, the top fixedly connected with locating piece 72 of connecting plate 71, constant head tank 73 has been seted up to the bottom of piston 12, and the outer wall of locating piece 72 is connected with the inner wall activity interlude of constant head tank 73, through the locating piece 72 card in the constant head tank 73 in piston 12 for connecting plate 71 is connected with piston 12, thereby makes push rod 13 stably drive piston 12 and removes.

The working principle of the utility model is as follows:

the needle is sleeved on the nipple 53, then the needle is inserted into a liquid medicine bottle, then the push rod 13 is pulled, the push rod 13 drives the piston 12 to move, so that negative pressure is generated inside the outer cylinder 11 to pump liquid medicine into the outer cylinder 11, the first fixing ring 21 moves along with the movement of the push rod 13, the clamping block 26 does not prop against the blocking block 23 any more until the clamping block 26 is separated from the first fixing ring 21, the second fixing ring 24 is reset, and then the blocking block 23 falls from the clamping groove 22 until the liquid medicine is absorbed by the syringe;

when the medical staff infuses into the patient, along with the movement of the push rod 13, the second fixing ring 24 extrudes the clamping block 26 until the second fixing ring 24 deforms until the clamping block 26 is clamped into the clamping groove 22, at the moment, the piston 12 completely extrudes the liquid medicine in the outer barrel 11, and the push rod 13 cannot move outside the outer barrel 11 through the cooperation of the first tangential plane 61 and the second tangential plane 62, so that the syringe can be prevented from being used for the second time.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The syringe capable of preventing secondary use comprises an outer cylinder (11), wherein a piston (12) is arranged on the inner wall of the outer cylinder (11) in a penetrating manner, and a push rod (13) is arranged at the bottom end of the piston (12);

the device is characterized in that an auxiliary mechanism is arranged on the inner wall of the outer cylinder (11);

the auxiliary mechanism comprises a first fixing ring (21) and a second fixing ring (24), the first fixing ring (21) is fixedly sleeved on the outer wall of the push rod (13), a plurality of clamping grooves (22) are formed in the outer wall of the first fixing ring (21), blocking blocks (23) are arranged in the clamping grooves (22), the second fixing ring (24) is fixedly connected to the inner wall of the outer cylinder (11), a plurality of clamping blocks (26) are fixedly connected to the inner wall of the second fixing ring (24), shrinkage grooves (25) are formed in the bottom end of the second fixing ring (24), and limiting structures are arranged between the clamping blocks (26) and the clamping grooves (22).

2. The syringe for preventing secondary use according to claim 1, wherein the limiting structure comprises a first tangential surface (61) and a second tangential surface (62), the first tangential surface (61) is disposed at the top end of the clamping block (26), and the second tangential surface (62) is disposed at the top end of the inner wall of the clamping groove (22).

3. The syringe for preventing secondary use according to claim 1, wherein a clamping hole (31) is formed at one side of the blocking piece (23), and a chamfer is formed at an end of the clamping block (26).

4. The syringe for preventing secondary use according to claim 1, wherein the outer wall of the push rod (13) is fixedly connected with two limit strips (43), the inner wall of the outer cylinder (11) is fixedly connected with a third fixing ring (41), two limit grooves (42) are formed in the inner wall of the third fixing ring (41), and the outer walls of the two limit strips (43) are respectively connected with the inner walls of the two limit grooves (42) in a movable penetrating manner.

5. The syringe for preventing secondary use according to claim 1, wherein the bottom of the outer wall of the outer cylinder (11) is fixedly connected with two pulling plates (51), the bottom end of the push rod (13) is fixedly connected with a pressing plate (52), and the top end of the outer cylinder (11) is fixedly connected with a nipple (53).

6. The syringe for preventing secondary use according to claim 1, wherein a connecting plate (71) is fixedly connected to the top end of the push rod (13), a positioning block (72) is fixedly connected to the top end of the connecting plate (71), a positioning groove (73) is formed in the bottom end of the piston (12), and the outer wall of the positioning block (72) is movably inserted and connected with the inner wall of the positioning groove (73).