Connecting structure of injector and needle head

Abstract

The utility model discloses an injector and needle head connecting structure which comprises a needle tube, a piston is movably arranged in the needle tube in a clamping mode, a push rod is fixedly arranged on one side of the piston, a needle head is arranged at the lower end of the needle tube, and a connecting mechanism used for fixing is arranged between the needle head and the needle tube. The connecting mechanism comprises a connecting sleeve, clamping jaws, an extrusion sleeve, an extrusion ring, a connector and a limiting ring, the connecting sleeve is fixedly arranged at the lower end of the needle tube, the multiple clamping jaws are evenly and fixedly arranged on the outer side surface of the connecting sleeve, and the extrusion sleeve is movably arranged on the outer side surface of the connecting sleeve in a screwed mode through threads. An extrusion ring is fixedly arranged on the side wall of the inner side of the extrusion sleeve, and a connector is fixedly arranged at the upper end of the needle head. According to the utility model, veterinary use is improved, and the connection stability of the needle head and the injector can be greatly improved; even if the animal struggles to drive the needle to rotate, the needle cannot be loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to a connection structure between a syringe and a needle. Background Art

[0002] A syringe is one of the commonly used devices in the prior art. In the prior art, a syringe is generally composed of a syringe and a needle, and the connection structure between the syringe and the needle is very important to ensure that the injection work can be carried out normally. The connection structures of the syringe and the needle in the prior art are various, including a connection method of mutual engagement through interference connection and a fixing method using threaded screwing. Among them, the structure using threaded connection is the most secure. However, on veterinary syringes, since animals are not as easy to control as humans, even if the animal is threadedly connected when struggling, when injecting multiple animals in large quantities, the animal's continuous struggle can easily cause the needle to reverse and loosen, thereby causing the needle to break away from the syringe. Therefore, in order to address this problem, an improved connection structure between the syringe and the needle is needed. Utility Model Content

[0003] The purpose of the utility model is to provide a connection structure between a syringe and a needle to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connection structure between a syringe and a needle, comprising a needle tube, a piston movably engaged with the inside of the needle tube, a push rod fixedly arranged on one side of the piston, a needle arranged at the lower end of the needle tube, a connection mechanism for fixing is arranged between the needle and the needle tube, the connection mechanism comprises a connecting sleeve, claws, an extrusion sleeve, an extrusion ring, a connector, and a limit ring, a connecting sleeve is fixedly arranged at the lower end of the needle tube, a plurality of claws are evenly fixedly arranged on the outer surface of the connecting sleeve, an extrusion sleeve is movably screwed on the outer surface of the connecting sleeve through a thread, an extrusion ring is fixedly arranged on the inner side wall of the extrusion sleeve, a connector is fixedly arranged on the upper end of the needle, and a limit ring is fixedly arranged on the outer surface of the connector.

[0005] Preferably, a sealing ring is fixedly provided on the upper end of the connector, and a sealing groove is provided on the outer surface of the connector sleeve; the sealing performance between the connector and the connector sleeve can be improved by inserting the sealing ring into the sealing groove.

[0006] Preferably, a flow channel is provided inside the connector and the connecting sleeve, and the needle and the inside of the needle tube can be connected through the flow channel, so that the drug solution inside the needle tube can flow into the needle.

[0007] Preferably, a fixing ring is fixedly provided on the outer surface of the needle tube. When in use, the user inserts the index finger and thumb into the fixing ring to improve the stability of the holding device and prevent the device from falling due to the animal's struggle when the device is used on the animal.

[0008] Preferably, a connecting ring is fixedly provided at one end of the push rod, and the user can insert a thumb through the connecting ring, thereby conveniently driving and pushing the push rod to move.

[0009] Preferably, the claw is made of elastic metal material, and the claw made of elastic metal material can bend when squeezed by the extrusion sleeve, so as to lock, squeeze and clamp the limiting ring, thereby completing the fixation of the connector and the needle; and when the claw loses its extrusion, the claw can open to the surroundings under the action of its own elasticity, at which time the claw can be misaligned with the limiting ring, and the connector can be removed from the connecting sleeve.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. When the animal struggles with the needle and wants to separate it directly from the syringe during use of the utility model, the claws can effectively lock it. If the needle is driven to rotate, no matter how the needle rotates, the extrusion sleeve will not be subjected to rotational force and will not loosen. This can greatly improve the connection effect between the needle and the syringe, making it easier to promote veterinary drug injection.

[0012] 2. When the utility model connects the needle, the connector is aligned with the connecting sleeve and inserted, and the sealing ring is inserted into the sealing groove; then the extrusion sleeve is tightened so that the extrusion sleeve squeezes the claws, and the claws can be bent when squeezed by the extrusion sleeve, so that the limit ring can be locked and squeezed to clamp the connector and the needle. The overall connection steps of such a device are slightly increased by 2 steps compared with the prior art, and such a device is also relatively simple to operate and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the connection structure between a syringe and a needle of the utility model;

[0014] Figure 2 This is a cross-sectional view of the connection structure between a syringe and a needle of the utility model;

[0015] Figure 3 This is an overall structural view of a connecting mechanism in a connecting structure between a syringe and a needle of the utility model;

[0016] Figure 4 This is a connection view of a needle in a connection structure of a syringe and a needle of the utility model.

[0017] In the figure: 1. needle tube; 2. piston; 3. push rod; 4. connecting sleeve; 5. claw; 6. extrusion sleeve; 7. extrusion ring; 8. connector; 9. limit ring; 10. sealing ring; 11. sealing groove; 12. flow channel; 13. fixing ring; 14. connecting ring; 15. needle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides a technical solution: a connection structure of a syringe and a needle 15, comprising a needle tube 1, a piston 2 is movably engaged inside the needle tube 1, a push rod 3 is fixedly arranged on one side of the piston 2, a needle 15 is arranged at the lower end of the needle tube 1, a connection mechanism for fixing is arranged between the needle 15 and the needle tube 1, the connection mechanism comprises a connecting sleeve 4, a claw 5, an extrusion sleeve 6, an extrusion ring 7, a connector 8, and a limit ring 9, a connecting sleeve 4 is fixedly arranged at the lower end of the needle tube 1, a plurality of claws 5 are evenly fixedly arranged on the outer surface of the connecting sleeve 4, an extrusion sleeve 6 is movably screwed on the outer surface of the connecting sleeve 4 through a thread, an extrusion ring 7 is fixedly arranged on the inner side wall of the extrusion sleeve 6, a connector 8 is fixedly arranged on the upper end of the needle 15, and a limit ring 9 is fixedly arranged on the outer surface of the connector 8.

[0020] A sealing ring 10 is fixedly provided at the upper end of the connector 8, and a sealing groove 11 is provided on the outer surface of the connector sleeve 4; the sealing ring 10 is inserted into the sealing groove 11 to improve the sealing performance between the connector 8 and the connector sleeve 4;

[0021] The connector 8 and the connecting sleeve 4 are provided with a flow channel 12 inside, through which the needle 15 and the inside of the needle tube 1 can be connected, so that the liquid medicine inside the needle tube 1 can flow into the needle 15;

[0022] A fixing ring 13 is fixedly provided on the outer surface of the needle tube 1. When in use, the user inserts the index finger and thumb into the fixing ring 13 to improve the stability of the holding device and prevent the device from falling due to the animal's struggle when the device is used on the animal.

[0023] A connecting ring 14 is fixedly provided at one end of the push rod 3, through which the user can insert the thumb, so as to facilitate the pushing and moving;

[0024] The claw 5 is made of elastic metal material. The claw 5 made of elastic metal material can bend when squeezed by the extrusion sleeve 6, so that the limit ring 9 can be locked, squeezed and clamped, thereby completing the fixation of the connector 8 and the needle 15; and when the claw 5 loses its extrusion, the claw 5 can open to the surroundings under the action of its own elasticity. At this time, the claw 5 can be misaligned with the limit ring 9, and the connector 8 can be removed from the connecting sleeve 4.

[0025] Working principle: When using the device, the piston 2 can be pushed up and down to make the device play a basic role in injecting and absorbing liquid medicine. The device is improved for veterinary use, which can greatly improve the connection stability between the needle 15 and the syringe. When the needle 15 and the needle tube 1 are connected, the specific shape is as follows: Figure 3 As shown, firstly, the extrusion sleeve 6 is twisted to make the extrusion sleeve 6 move away from the needle tube 1, at which time the claws 5 lose the extrusion, and the claws 5 can be opened to the surroundings under the action of their own elasticity, and then the connector 8 is aligned with the connecting sleeve 4 and inserted, and the sealing ring 10 is clamped into the sealing groove 11; then, the extrusion sleeve 6 is tightened again, so that the extrusion sleeve 6 squeezes the claws 5, and the claws 5 can be bent when being squeezed by the extrusion sleeve 6, so that the limit ring 9 can be locked and squeezed to clamp, so that the connector 8 and the needle 15 can be fixed; and when the device is used, when the animal struggles and wants to separate the needle 15 directly from the needle tube 1, the claws 5 can effectively lock it, and if the needle 15 is driven to rotate, no matter how the needle 15 rotates; the extrusion sleeve 6 will not be subjected to the rotational force, so it will not loosen, so that the connection effect between the needle 15 and the syringe of the device can be greatly improved, which is convenient for promoting veterinary liquid injection.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connection structure between a syringe and a needle, comprising a needle tube (1), characterized in that: A piston (2) is movably engaged inside the needle tube (1), a push rod (3) is fixedly arranged on one side of the piston (2), a needle head (15) is arranged at the lower end of the needle tube (1), a connection mechanism for fixing is arranged between the needle head (15) and the needle tube (1), the connection mechanism comprising a connection sleeve (4), a clamping claw (5), an extrusion sleeve (6), an extrusion ring (7), a connector (8), and a limit ring (9), a connection sleeve (4) is fixedly arranged at the lower end of the needle tube (1), a plurality of clamping claws (5) are evenly fixedly arranged on the outer surface of the connection sleeve (4), an extrusion sleeve (6) is movably screwed on the outer surface of the connection sleeve (4) through a thread, an extrusion ring (7) is fixedly arranged on the inner side wall of the extrusion sleeve (6), a connector (8) is fixedly arranged at the upper end of the needle head (15), and a limit ring (9) is fixedly arranged on the outer surface of the connector (8).

2. The connection structure between a syringe and a needle according to claim 1, characterized in that: A sealing ring (10) is fixedly arranged on the upper end of the connecting head (8), and a sealing groove (11) is provided on the outer surface of the connecting sleeve (4).

3. The connection structure between a syringe and a needle according to claim 1, characterized in that: A flow channel (12) is provided inside the connecting head (8) and the connecting sleeve (4).

4. The connection structure between a syringe and a needle according to claim 1, characterized in that: A fixing ring (13) is fixedly arranged on the outer surface of the needle tube (1).

5. The connection structure between a syringe and a needle according to claim 1, characterized in that: A connecting ring (14) is fixedly provided at one end of the push rod (3).

6. The connection structure between a syringe and a needle according to claim 1, characterized in that: The clamping claw (5) is made of elastic metal material.

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