A needle-knife device with a function of injecting medicine

Abstract

The application relates to a needle-knife appliance with a medicine injection function, which comprises a needle body, a needle handle fixedly connected to the rear end of the needle body, and an injection push rod arranged at the rear end of the needle handle, a medicine liquid storage cavity penetrating through the front and rear ends is arranged in the needle handle, the front end of the injection push rod extends into the medicine liquid storage cavity, a detachable locking ring is arranged between the rear end of the needle handle and the rear end of the injection push rod, the rear end of the injection push rod is provided with a pressing cap, the locking ring is sleeved on the injection push rod, the locking ring is arranged in the form of an open ring, and the locking ring is connected with the pressing cap and the needle handle through multiple points on the two sides respectively. The needle-knife appliance contains medicine and medicine injection structure, medicine is injected to the affected area while the needle-knife is implanted, and the convenience of the needle-knife is improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a needle knife device with drug injection function. Background Technology

[0002] The needle knife is a unique medical tool that combines traditional Chinese acupuncture techniques with the blade design of modern surgery. It is particularly suitable for treating soft tissue injuries and chronic soft tissue damage caused by bone and joint diseases. Its shape resembles a traditional acupuncture needle, but its tip is designed as a flat-edged blade.

[0003] A disposable minimally invasive ablation needle knife is disclosed in related technologies, including a needle body, an ablation head, and a handle. The ablation head is connected to one end of the needle body and includes a distal blunt tip and a proximal blade. The handle is connected to the other end of the needle body. However, when treating patients, the inventors found that the treatment effect of using the needle knife alone is not good, and it is necessary to use auxiliary drug treatment. It is inconvenient to add drugs after or before acupuncture, making it inconvenient to use. Utility Model Content

[0004] The purpose of this application is to provide a needle knife device with drug injection function, which contains drugs and a drug injection structure, so that drugs are injected into the affected area at the same time as the needle knife is used for implantation, thereby improving the convenience of needle knife use.

[0005] The needle-knife device with drug injection function provided in this application adopts the following technical solution:

[0006] A needle knife device with drug injection function includes a needle body, a needle handle fixedly connected to the rear end of the needle body, and an injection push rod disposed at the rear end of the needle handle. The needle handle is provided with a drug storage cavity extending through both ends. The front end of the injection push rod extends into the drug storage cavity. A detachable locking ring is provided between the rear end of the needle handle and the rear end of the injection push rod.

[0007] As a preferred technical solution of this application, the injection plunger is provided with a pressing cap at its rear end, and a locking ring is sleeved on the injection plunger. The locking ring is a non-sealed annular ring, and the two sides of the locking ring are connected to the pressing cap and the needle handle through multiple points.

[0008] As a preferred technical solution of this application, a pull plate is provided on the outer side of the locking ring corresponding to the opening.

[0009] As a preferred technical solution of this application, a locking cap is provided at the rear end of the needle body, and the locking cap is injection molded at the front end of the needle handle.

[0010] As a preferred technical solution of this application, the needle handle is provided with a needle body bending structure, and the needle body bending structure moves relative to the needle handle to bend the needle body.

[0011] As a preferred technical solution of this application, the needle body bending structure includes a front bending portion and a rear connecting portion, the bending portion being sleeved on the needle body and the connecting portion being slidably sleeved on the needle handle.

[0012] As a preferred technical solution of this application, the bending part is configured as an arc-shaped plate, one end of which is connected to the connecting part, and the inner diameter of the arc-shaped plate gradually increases towards the end away from the connecting part.

[0013] As a preferred technical solution of this application, the connecting part is configured as a U-shaped strip with a U-shaped cross-section. The inner walls of the two side plates of the U-shaped strip are provided with linear sliding guide grooves. The distance between the sliding guide grooves and the bottom plate of the U-shaped strip gradually decreases along the direction from front to back. The outer surface of the needle handle is provided with two parallel contact planes. Guide protrusions are provided on the two contact planes and are slidably disposed in the sliding guide grooves. The opening direction of the U-shaped strip is the same as the bending direction of the front end of the arc plate.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. The needle knife device of this application is provided with a medicine storage cavity for storing medicine, which can store the medicine needed for treatment. When the needle knife is inserted into the affected area, the medicine can be injected into the affected area, which improves the treatment effect and is more convenient.

[0016] 2. The needle body adopts a bending structure. As the bending structure moves forward, the curved plate can gradually push the needle body to bend, allowing the needle body to bend at any angle, making it convenient for doctors to insert the needle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the needle knife device according to Embodiment 1 of this application;

[0018] Figure 2 This is a cross-sectional view of the needle knife device according to Embodiment 1 of this application;

[0019] Figure 3 This is a schematic diagram of the external structure of the needle knife device according to Embodiment 2 of this application;

[0020] Figure 4 This is a cross-sectional schematic diagram of the needle bending structure in Embodiment 2 of this application;

[0021] Figure 5 This is a schematic diagram of the installation structure of the needle bending structure in Embodiment 2 of this application;

[0022] Figure 6 This is a schematic diagram of the needle bending structure in the usage state of Embodiment 2 of this application;

[0023] In the diagram, 1 is the needle body; 11 is the locking cap; 2 is the needle handle; 21 is the contact plane; 22 is the guide protrusion; 3 is the injection plunger; 31 is the pressing cap; 4 is the drug storage cavity; 5 is the locking ring; 51 is the pull plate; 6 is the needle body bending structure; 61 is the arc plate; 62 is the U-shaped strip plate; and 63 is the sliding guide groove. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail below.

[0025] Example 1: This example proposes a needle knife device with drug injection function, referring to... Figure 1-2 The device includes a needle body 1, a needle handle 2, an injection plunger 3, and a locking ring 5.

[0026] The needle body 1 is a hollow metal structure, with the main body being a hollow needle tube and a blade at the front end. A locking cap 11 is fixedly installed at the rear end of the needle body 1, which can be fixedly connected to the needle handle 2.

[0027] The needle handle 2 is injection molded from plastic material. In this embodiment, the needle handle 2 is set as a cylindrical hollow tube with anti-slip treatment on the outer wall. The needle handle 2 is provided with a medicine storage cavity 4 with a circular cross-section that extends through the front and rear ends. The needle body 1 is injection molded onto the front end of the needle handle 2 through the locking cap 11, so that the locking cap 11 is restricted by the structure of the needle handle 2 on both the front and rear sides to prevent the needle body 1 from falling off.

[0028] The injection plunger 3 is connected to the rear end of the needle handle 2. The injection plunger 3 includes a cylindrical main rod and a circular pressing cap 31 at the rear end. The length of the main rod of the injection plunger 3 is not less than the length of the drug storage chamber 4. The diameter of the main rod of the injection plunger 3 is adapted to the inner diameter of the drug storage chamber 4 and is inserted into the drug storage chamber 4, so that the injection plunger 3 can be sealed at the rear end of the needle handle 2. The pressing cap 31 is set as a disc-shaped structure. When using the needle knife, the injection plunger 3 can be pushed forward by pressing the pressing cap 31 with the fingers. The injection plunger 3 pushes the drug in the drug storage chamber 4 out through the needle body 1 and injects it into the affected area.

[0029] To prevent the injection plunger 3 from being accidentally squeezed and causing waste of medication, a detachable locking ring 5 is provided between the rear end of the needle handle 2 and the pressing cap 31 of the injection plunger 3 in this embodiment. The locking ring 5 is supported between the needle handle 2 and the pressing cap 31, maintaining a sufficient safe distance between them. In this embodiment, the locking ring 5 is an open annular structure with a gap between its two ends. The locking ring 5 is fitted onto the injection plunger 3. When medication needs to be injected, the locking ring 5 can be removed and the injection plunger 3 can be pushed forward. The front and rear sides of the locking ring 5 are connected to the front side of the pressing cap 31 and the rear end face of the needle handle 2 through multiple points, which can be in the form of protruding abutments to prevent the locking ring 5 from loosening. A pull plate 51 is provided on the outer side of the locking ring 5 corresponding to the opening, which makes it easy to pull off the locking ring 5.

[0030] Example 2: In order to solve the problem that the needle knife is too straight and not suitable for some scenarios that require the needle knife to be bent, this example solves the problem by using a structure that allows the needle body 1 to be bent, making the needle knife more convenient to use.

[0031] Reference Figure 3-6 In this embodiment, a needle body bending structure 6 is provided on the outside of the needle handle 2. The needle body bending structure 6 bends the needle body 1 by sliding forward along the needle handle 2. Specifically, the needle body bending structure 6 includes a bending part at the front end and a connecting part at the rear end. The bending part and the connecting part are fixedly connected. The bending part is sleeved on the needle body 1, and the connecting part is slidably sleeved on the needle handle 2.

[0032] The bending section is configured as an arc-shaped plate 61, one end of which is connected to the connecting section. The inner diameter of the arc-shaped plate 61 gradually increases towards the end away from the connecting section. The connecting section is configured as a U-shaped strip 62 with a U-shaped cross-section. The end of the arc-shaped plate 61 is fixed to the end of the bottom plate of the U-shaped strip 62. The inner walls of the two side plates of the U-shaped strip 62 are provided with linear sliding guide grooves 63. The distance between the sliding guide grooves 63 and the bottom plate of the U-shaped strip 62 gradually decreases from front to back. In this embodiment, the opening direction of the U-shaped strip 62 is the same as the bending direction of the front end of the arc-shaped plate 61. In this embodiment, the outer surface of the needle handle 2 is provided with two parallel contact planes 21. A pair of guide protrusions 22 are provided opposite to each other on the two contact planes 21. When the U-shaped strip 62 is fitted onto the needle handle 2, the inner walls of the two side plates of the U-shaped strip 62 contact the contact planes 21, and the guide protrusions 22 are slidably disposed in the sliding guide grooves 63. In the initial state, the guide protrusion 22 is located at the front end of the sliding guide groove 63. The front end of the arc plate 61 may or may not abut against the outer surface of the needle body 1. When it is necessary to bend the needle body 1, hold the rear end of the needle handle 2 and slowly push the needle bending structure 6 forward. The needle bending structure 6 moves forward and downward, and the front end of the arc plate 61 also moves forward and downward, gradually pressing the needle body 1 downward. The greater the forward movement of the needle bending structure 6, the greater the degree of bending of the needle body 1.

[0033] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A needle-knife device with drug injection function, characterized in that, It includes a needle body (1), a needle handle (2) fixedly connected to the rear end of the needle body (1), and an injection push rod (3) set at the rear end of the needle handle (2). The needle handle (2) is provided with a drug storage cavity (4) that runs through both the front and rear ends. The front end of the injection push rod (3) extends into the drug storage cavity (4). A detachable locking ring (5) is provided between the rear end of the needle handle (2) and the rear end of the injection push rod (3).

2. The needle knife device with drug injection function according to claim 1, characterized in that, The injection plunger (3) is provided with a pressing cap (31) at its rear end. A locking ring (5) is sleeved on the injection plunger (3). The locking ring (5) is an open ring. The two sides of the locking ring (5) are connected to the pressing cap (31) and the needle handle (2) through multiple points.

3. The needle knife device with drug injection function according to claim 2, characterized in that, A pull plate (51) is provided on the outer side of the locking ring (5) corresponding to the opening.

4. A needle-knife device with drug injection function according to claim 1, characterized in that, The needle body (1) is provided with a locking cap (11) at the rear end, and the locking cap (11) is injection molded on the front end of the needle handle (2).

5. A needle-knife device with drug injection function according to claim 1, characterized in that, The needle handle (2) is provided with a needle body bending structure (6) on the outside. The needle body bending structure (6) moves relative to the needle handle (2) to bend the needle body (1).

6. A needle-knife device with drug injection function according to claim 5, characterized in that, The needle body bending structure (6) includes a front bending part and a rear connecting part. The bending part is sleeved on the needle body (1), and the connecting part is slidably sleeved on the needle handle (2).

7. A needle-knife device with drug injection function according to claim 6, characterized in that, The bending part is configured as an arc plate (61), one end of which is connected to the connecting part, and the inner diameter of the arc plate (61) gradually increases towards the end away from the connecting part.

8. A needle-knife device with drug injection function according to claim 7, characterized in that, The connecting part is configured as a U-shaped strip (62) with a U-shaped cross-section. The inner walls of the two side plates of the U-shaped strip (62) are provided with linear sliding guide grooves (63). The distance between the sliding guide groove (63) and the bottom plate of the U-shaped strip (62) gradually decreases along the direction from front to back. The outer surface of the needle handle (2) is provided with two parallel contact planes (21). The two contact planes (21) are provided with guide protrusions (22) and are slidably disposed in the sliding guide groove (63). The opening direction of the U-shaped strip (62) is the same as the bending direction of the front end of the arc plate (61).

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