Nerve retractor

Abstract

The utility model provides a nerve drag hook which comprises a handle and a hook body and further comprises a bending mechanism connected with the handle and the hook body, the bending mechanism comprises a base and a movable seat rotatably connected with the base, the base is connected with the handle, and the movable seat is connected with the hook body; the bending mechanism further comprises a limiting structure, the limiting structure comprises an arc-shaped groove and a plug pin, the arc-shaped groove is formed in the base, the plug pin is detachably connected with the movable base, and the relative angle between the movable base and the base is adjusted through the locking position of the plug pin in the arc-shaped groove, so that the relative angle between the handle and the hook body is adjusted. The rotatable connecting base and the movable base are used for being connected with the handle and the hook body respectively, so that the angle between the handle and the hook body is adjustable, an integrated nerve drag hook in the prior art is avoided, and therefore the angle between the handle and the hook body of the nerve drag hook can be adaptively adjusted in later use, the nerve drag hook is suitable for various use scenes, and the use experience of the nerve drag hook is improved. Neural drag hooks of various specifications do not need to be purchased at the same time, application scenes are increased, and use cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a nerve retractor. Background Art

[0002] Spinal surgery, especially lumbar surgery, has a small surgical field when dealing with intervertebral discs. In order to more clearly expose the lumbar intervertebral disc, the dura mater sac and nerve roots must be retracted to expand the field of view, better expose the intervertebral disc, and facilitate surgical operations. During this operation, a nerve retractor must be used to retract the dura mater sac and nerve roots to one side to achieve the purpose of exposing the intervertebral disc.

[0003] A nerve retractor generally includes a handle, a hook body, and a bending structure connecting the handle and the hook body. The handle provides a force point for the user, and the hook body is used to retract the dura mater sac and nerve roots to expose the intervertebral disc. Through different bending structures, the handle and the hook body are at different angles to provide avoidance space for surgical operations. Specifically, the bending angles of the handle and the hook body of commonly used nerve retractors generally include 90°, 135°, and 180°.

[0004] In the prior art, nerve retractors are generally of an integrated structure, so that the bending angles of the handle and the hook body are determined at the factory and cannot be adaptively adjusted during subsequent use, resulting in a single application scenario. When users need to use nerve retractors with different angles, they can only replace nerve retractors with different angle specifications, which increases the cost of using the nerve retractor. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a nerve retractor to solve the technical problems in the prior art that the bending angle between the nerve retractor handle and the hook body cannot be adjusted, the applicable scenarios are single, and the use cost of the nerve retractor is increased.

[0006] In one aspect, the present invention provides a nerve retractor, comprising a handle and a hook body, the nerve retractor further comprising a bending mechanism connecting the handle and the hook body, the bending mechanism comprising a base and a movable seat rotatably connected to the base, the base being connected to the handle, and the movable seat being connected to the hook body;

[0007] The bending mechanism also includes a limiting structure, which includes an arc groove and a latch, wherein the arc groove is arranged on the base, and the latch is detachably connected to the movable seat. The relative angle between the movable seat and the base is adjusted by the locking position of the latch in the arc groove, thereby adjusting the relative angle between the handle and the hook body.

[0008] The above-mentioned nerve retractor is used to connect the handle and the hook body respectively through a rotatable connection base and a movable seat, so that the angle of the handle and the hook body can be adjusted, avoiding the integrated nerve retractor in the prior art, so that the angle of the handle and the hook body of the nerve retractor can be adaptively adjusted in later use, so that a nerve retractor can be used in a variety of usage scenarios, without the need to purchase nerve retractors of various specifications at the same time, which increases the applicable scenarios and saves the use cost. Furthermore, through the cooperation of the latch and the arc groove, the handle and the hook body can be stabilized at the corresponding angle, which is convenient for users to use.

[0009] In addition, the nerve retractor according to the utility model may also have the following additional technical features:

[0010] Furthermore, the base includes a first movable disk and a first connecting portion provided on one side of the first movable disk, the movable seat includes a second movable disk and a second connecting portion provided on one side of the second movable disk, the first movable disk and the second movable disk are rotatably connected, the first connecting portion is detachably connected to the handle, and the second connecting portion is detachably connected to the hook body.

[0011] Furthermore, the first movable disk and the second movable disk are rotatably connected via a coaxial axis.

[0012] Furthermore, the arc-shaped groove is provided with a plurality of locking grooves, and each of the locking grooves corresponds to a different angle with the concentric axis.

[0013] Furthermore, angles between the locking groove and the concentric axis include 90°, 135° and 180°.

[0014] Furthermore, when the latch is arranged in a 180° locking groove, the handle and the hook body are arranged horizontally.

[0015] Furthermore, the second movable disk is provided with a plurality of hollow areas.

[0016] Furthermore, the first connection portion is provided with an internal thread, and the second connection portion is provided with an external thread.

[0017] Furthermore, the first movable disk is provided with two arc-shaped grooves, and the two arc-shaped grooves are symmetrically arranged.

[0018] Furthermore, the second movable disk is provided with two latches, and the two latches are symmetrically arranged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the bending mechanism in the embodiment of the utility model;

[0020] Figure 2 for Figure 1 The main view;

[0021] Figure 3 This is a schematic diagram of the structure of the movable seat in the embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the base in the embodiment of the utility model.

[0023] Description of main component symbols:

[0024] Base 100 First activity disk 110 First connection part 120 Activity seat 200 Second activity disk 210 Second connection part 220 Limiting structure 300 Arc groove 310 Card slot 311 plug 320 Concentric Axis 410 Through Hole 420

[0025] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] In order to solve the technical problem in the prior art that the bending angle between the handle and the hook body of the nerve retractor is not adjustable, the applicable scene is single, and the use cost of the nerve retractor is increased. The present application provides a nerve retractor, which is used to connect the handle and the hook body respectively through a rotatable connection base and a movable seat, so that the angle between the handle and the hook body is adjustable, avoiding the integrated nerve retractor in the prior art, so that the angle between the handle and the hook body of the nerve retractor can be adaptively adjusted during later use, so that one nerve retractor can be used in a variety of usage scenarios, without the need to purchase nerve retractors of various specifications at the same time, which increases the applicable scenes and saves the use cost. Furthermore, through the cooperation of the latch and the arc groove, the handle and the hook body can be stabilized at the corresponding angle, which is convenient for users to use.

[0030] In order to facilitate understanding of the present invention, several embodiments of the present invention are provided below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] Embodiment 1

[0032] See also Figures 1 to 4 , shown is a nerve retractor in an embodiment of the utility model, including a handle and a hook body, characterized in that the nerve retractor also includes a bending mechanism connecting the handle and the hook body, the bending mechanism includes a base 100 and a movable seat 200 rotatably connected to the base 100, the base 100 is connected to the handle (not shown in the figure), and the movable seat 200 is connected to the hook body (not shown in the figure);

[0033] The bending mechanism also includes a limiting structure 300, which includes an arc groove 310 and a latch 320. The arc groove 310 is arranged on the base 100, and the latch 320 is detachably connected to the movable seat 200. The relative angle between the movable seat 200 and the base 100 is adjusted by the locking position of the latch 320 in the arc groove 310, thereby adjusting the relative angle between the handle and the hook body.

[0034] As a specific example, the base 100 includes a first movable disk 110 and a first connecting portion 120 provided on one side of the first movable disk 110, the movable seat 200 includes a second movable disk 210 and a second connecting portion 220 provided on one side of the second movable disk 210, the first movable disk 110 and the second movable disk 210 are rotatably connected. In this embodiment, in order to improve the storage convenience of the nerve retractor, the first connecting portion 120 is detachably connected to the handle, and the second connecting portion 220 is detachably connected to the hook body.

[0035] Furthermore, the first movable disk 110 and the second movable disk 210 are rotatably connected via a coaxial shaft 410. Specifically, a through hole 420 is provided on the first movable disk 110, and the coaxial shaft 410 cooperates with the through hole 420, so that the first movable disk 110 and the second movable disk 210 can be disassembled and the first movable disk 110 and the second movable disk 210 can be rotated concentrically.

[0036] In this embodiment, each of the clamping slots 311 corresponds to a different angle with the concentric axis 410. In the existing products of nerve retractors, three specifications of 90°, 135° and 180° are conventionally used, that is, the angles between the handle and the hook body are 90°, 135° or 180° respectively. In order to make the improved nerve retractor of this scheme better suitable for actual use needs, in this embodiment, three clamping slots 311 of 90°, 135° and 180° are mainly provided on the arc groove 310, that is: the angles between the clamping slot 311 and the concentric axis 410 include 90°, 135° and 180°. It should be further explained that in actual use, the setting angle of the clamping slot 311 can also be reasonably adjusted according to other different angles, and the specific selection can be made according to actual needs. Specifically, in order to stabilize the shape and facilitate the use of the nerve retractor when the handle and the hook body are at 90°, 135° or 180°, a pin 320 is provided to limit the movable seat 200, that is, when the pin 320 is set in the 90° positioning groove 311, the handle and the hook body form a nerve retractor at 90°; when the pin 320 is set in the 135° positioning groove 311, the handle and the hook body form a nerve retractor at 135°; when the pin 320 is set in the 180° positioning groove 311, the handle and the hook body are set horizontally, that is, the corresponding nerve retractor is a straight rod type.

[0037] In this embodiment, a plurality of hollow areas are provided on the second movable disk 210. The first connecting portion 120 is provided with an internal thread, and the second connecting portion 220 is provided with an external thread; correspondingly, the connecting end of the handle and the first connecting portion 120 is provided with an external thread so that it can be screwed to the first connecting portion 120; the connecting end of the hook body and the second connecting portion 220 is provided with an internal thread so that it can be screwed to the second connecting portion 220. Further, in order to provide product strength of the nerve retractor and avoid insufficient stability of the pin limit when only one side has an arc groove, in this embodiment, two arc grooves 310 are provided on the first movable disk 110, and the two arc grooves 310 are symmetrically arranged; similarly, two latches 320 are provided on the second movable disk 210, and the two latches 320 are symmetrically arranged.

[0038] In summary, the nerve retractor in the above embodiment of the utility model is used to connect the handle and the hook body respectively through a rotatable connection base and a movable seat, so that the angle of the handle and the hook body can be adjusted, avoiding the integrated nerve retractor in the prior art, so that the angle of the handle and the hook body of the nerve retractor can be adaptively adjusted in later use, so that a nerve retractor can be used in a variety of usage scenarios, without the need to purchase nerve retractors of various specifications at the same time, increasing the applicable scenarios while saving the cost of use. Furthermore, through the cooperation of the latch and the arc groove, the handle and the hook body can be stabilized at the corresponding angle, which is convenient for users to use.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A nerve retractor, comprising a handle and a hook body, characterized in that: The nerve retractor further comprises a bending mechanism connecting the handle and the hook body, the bending mechanism comprises a base and a movable seat rotatably connected to the base, the base is connected to the handle, and the movable seat is connected to the hook body; The bending mechanism also includes a limiting structure, which includes an arc groove and a latch, wherein the arc groove is arranged on the base, and the latch is detachably connected to the movable seat. The relative angle between the movable seat and the base is adjusted by the locking position of the latch in the arc groove, thereby adjusting the relative angle between the handle and the hook body.

2. The nerve retractor according to claim 1, characterized in that: The base includes a first movable disk and a first connecting portion arranged on one side of the first movable disk, the movable seat includes a second movable disk and a second connecting portion arranged on one side of the second movable disk, the first movable disk and the second movable disk are rotatably connected, the first connecting portion is detachably connected to the handle, and the second connecting portion is detachably connected to the hook body.

3. The nerve retractor according to claim 2, characterized in that: The first movable disk and the second movable disk are rotatably connected via a coaxial axis.

4. The nerve retractor according to claim 3, characterized in that: The arc groove is provided with a plurality of clamping grooves, and each clamping groove corresponds to a different angle with the concentric axis.

5. The nerve retractor according to claim 4, characterized in that: The angles between the locking groove and the coaxial axis include 90°, 135° and 180°.

6. The nerve retractor according to claim 5, characterized in that: When the latch is arranged in the 180° locking groove, the handle and the hook body are arranged horizontally.

7. The nerve retractor according to claim 2, characterized in that: The second movable plate is provided with a plurality of hollow areas.

8. The nerve retractor according to claim 2, characterized in that: The first connection portion is provided with an internal thread, and the second connection portion is provided with an external thread.

9. The nerve retractor according to claim 2, characterized in that: The first movable disk is provided with two arc-shaped grooves, and the two arc-shaped grooves are symmetrically arranged.

10. The nerve retractor according to claim 2, characterized in that: The second movable disk is provided with two latches, which are symmetrically arranged.

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