Universal guide needle guider capable of accurately adjusting angle
By using meshed face gears and spring mechanisms in the universal guide needle guide, a guide with precise angle adjustment of 360° is realized, which solves the problem of insufficient flexibility in the direction of guide needle adjustment in the prior art, and improves the accuracy and flexibility of guide needle adjustment during the fixation of femoral neck fracture.
Patent Information
- Application Number
- CN202421251452.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The prior art is difficult to achieve a universal needle guide with a precise angle of 360°, resulting in insufficient flexibility in adjusting the needle direction during the fixation of the femoral neck fracture.
The fixed end face gear and the moving end face gear are used that are coaxial and intermeshed with each other, and the connected springs are stuck in a standstill state. When the end face gear is twisted, the spring is lengthened and rotated, thereby adjusting the angle between the guide needle and the guide needle reference sleeve.
The precise adjustment of the guide needle direction is achieved at 360°, which improves the flexibility and accuracy of guide needle adjustment during the fixation of femoral neck fracture.
Smart Images
Figure CN222676420U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical instruments, in particular to a universal needle guider capable of accurately adjusting angles. Background Art
[0002] When fixing femoral neck fractures, including dynamic hip screws, pfna, reconstruction screws, etc., the guide pin of the head and neck screw often needs to be adjusted many times, and needs 360° direction adjustment. Currently, only the FNS system has a 5° adjustment guide, but it is not easy to use. The others are parallel angle guides, so in most cases, the direction of the guide pin can only be changed by feel. Summary of the invention
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a universal needle guide which can accurately adjust the angle by 360 degrees.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A universal needle guide with precise angle adjustment comprises a coaxial and mutually meshing fixed end face gear and a movable end face gear, wherein a tension spring is connected to the intermediate shaft hole of the fixed end face gear and the movable end face gear, and in a static state, the movable end face gear and the fixed end face gear are clamped to each other under the action of the spring pullback; when the movable end face gear is twisted, the spring is stretched, and the movable end face gear can rotate relative to the fixed end face gear; a needle guide reference sleeve is fixed on the fixed end face gear, and a needle guide adjustment sleeve is fixed on the movable end face gear, and the angle between the needle guide adjustment sleeve and the needle guide reference sleeve is adjusted by twisting the movable end face gear.
[0006] Furthermore, there are two guide needle adjustment sleeves, and the distance between the two guide needle adjustment sleeves is 0.5 cm.
[0007] Furthermore, the number of teeth of the fixed end face gear and the movable end face gear is 72.
[0008] The utility model adopts the above technical solution, firstly inserts a Kirschner wire or a guide needle into the femoral neck as a reference needle through the guide needle reference sleeve, then determines the angle and direction to be adjusted after perspective, then accurately adjusts the angle of the guide needle adjustment sleeve by rotating the movable end face gear, and then assists in inserting the guide needle through the guide needle adjustment sleeve. The utility model can achieve 360° adjustment direction and accurately adjust the direction of the guide needle. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The present invention is further described in detail below with reference to the accompanying drawings and specific implementations:
[0010] Figure 1 It is a structural schematic diagram of the utility model;
[0011] Figure 2 It is a front view of the utility model;
[0012] Figure 3 It is a structural schematic diagram of the fixed end face gear and the movable end face gear meshing with each other. DETAILED DESCRIPTION
[0013] like Figure 1-3 As shown, the utility model is a universal needle guide with precise angle adjustment, comprising a coaxial and mutually meshing fixed end face gear 1 and a movable end face gear 2, wherein a tension-shaped spring 3 is connected at the intermediate shaft hole of the fixed end face gear 1 and the movable end face gear 2 (one end of the spring 3 is fixedly connected to the shaft hole of the fixed end face gear 1, and the other end of the spring 3 is fixed to the shaft hole of the movable end face gear 2). In a stationary state, the movable end face gear 2 and the fixed end face gear 1 are tightly clamped and stuck to each other under the action of the spring 3 pulling back; when the movable end face gear 2 is twisted, the spring 3 is stretched, and the movable end face gear 2 can rotate relative to the fixed end face gear 1. After the movable end face gear 2 is released, the spring 3 returns to its original position, thereby driving the movable end face gear 2 and the fixed end face gear 1 to be stuck.
[0014] A guide needle reference sleeve 4 is fixed on the fixed end face gear 1, and a guide needle adjustment sleeve 5 is fixed on the movable end face gear 2. The angle between the guide needle adjustment sleeve 5 and the guide needle reference sleeve 4 is adjusted by twisting the movable end face gear 2. There are two guide needle adjustment sleeves 5, and the distance between the two guide needle adjustment sleeves 5 is 0.5 cm.
[0015] In practical applications, preferably, the number of teeth of the fixed end gear 1 and the movable end gear 2 are both 72, each tooth corresponds to 5°, and a number of teeth rotation represents a number of 5° rotation. Of course, the more teeth the fixed end gear 1 and the movable end gear 2 have, the higher the adjustment accuracy.
[0016] The working principle of the utility model is as follows: first, relying on experience, a Kirschner wire or a guide needle is driven into the femoral neck through the guide needle reference sleeve 4 as a reference needle, and then the angle and orientation that need to be adjusted are determined after perspective, and then the angle of the guide needle adjustment sleeve 5 is accurately adjusted by rotating the movable end face gear 2, and then the guide needle is inserted through the guide needle adjustment sleeve 5 to assist.
[0017] The above describes the specific implementation of the present invention, but those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this implementation without departing from the principle and essence of the present invention, but these changes and modifications are all within the scope of protection of the present invention.
Claims
1. A universal needle guide capable of precisely adjusting the angle, characterized in that: It comprises a fixed end face gear and a movable end face gear which are coaxial and mesh with each other. A tension spring is connected to the intermediate shaft hole of the fixed end face gear and the movable end face gear. In a static state, the movable end face gear and the fixed end face gear are clamped to each other under the action of the spring pullback. When the movable end face gear is twisted, the spring is stretched and the movable end face gear can rotate relative to the fixed end face gear. A guide pin reference sleeve is fixed on the fixed end face gear, and a guide pin adjustment sleeve is fixed on the movable end face gear. The angle between the guide pin adjustment sleeve and the guide pin reference sleeve is adjusted by twisting the movable end face gear.
2. The universal needle guide with accurate angle adjustment according to claim 1, characterized in that: The number of the guide needle adjustment sleeves is two, and the distance between the two guide needle adjustment sleeves is 0.5 cm.
3. The universal needle guide with accurate angle adjustment according to claim 1, characterized in that: The number of teeth of the fixed end face gear and the movable end face gear are both 72.