Nerve retractor device

Abstract

The present invention provides a nerve retractor device, which comprises: a clamping assembly, comprising a first clamp arm, a second clamp arm and a locking component, the first clamp arm and the second clamp arm are hinged, the first clamp arm and the second clamp arm are respectively provided with a clamping groove, the locking component is connected to the first clamp arm and the second clamp arm and is used to keep the first clamp arm and the second clamp arm in a clamped state; a mounting seat, connected to the first clamp arm or the second clamp arm; a retractor, comprising a handle, a rod and a hook, one end of the rod is connected to the handle, and the other end is connected to the hook, the handle and the hook are located on the same side of the rod, and the handle is detachably connected to the mounting seat. The locking component keeps the first clamp arm and the second clamp arm in a clamped state, and can be clamped on a columnar object next to an operating table to fix the position of the retractor, and the position of the retractor can be adjusted according to surgical requirements, and the doctor does not need to hold the retractor to stabilize it, which is convenient for the doctor to operate with both hands to perform surgery, thereby improving the efficiency of the surgery.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a nerve retractor device. Background Art

[0002] In surgical operations, such as minimally invasive spinal canal surgery, nerves need to be pulled apart to expose the area to be operated on and to avoid nerve damage during the operation. Currently, during the operation, doctors usually need to hold the nerve retractor with one hand to pull the nerve apart and perform the operation with the other hand, which reduces the efficiency of the operation.

[0003] Therefore, it is also necessary to provide a new nerve retractor device to solve the above problems. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the present invention provides a nerve retractor device which is convenient for doctors to operate with both hands for surgery.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A nerve retractor device comprises: a clamping assembly, comprising a first clamping arm, a second clamping arm and a locking component, the first clamping arm and the second clamping arm are hinged, the first clamping arm and the second clamping arm are respectively provided with a clamping groove, the locking component is connected to the first clamping arm and the second clamping arm and is used to keep the first clamping arm and the second clamping arm in a clamped state; a mounting seat, connected to the first clamping arm or the second clamping arm; a retractor, comprising a handle, a rod and a hook, one end of the rod is connected to the handle, and the other end is connected to the hook, the handle and the hook are located on the same side of the rod, and the handle is detachably connected to the mounting seat.

[0007] Preferably, the nerve hook device further comprises a fixing seat and a first elastic member, the fixing seat is connected to the mounting seat, the handle is movably connected to the fixing seat, and the first elastic member is connected to the fixing seat and cooperates with the fixing seat to clamp the handle.

[0008] Preferably, the edge of the handle is provided with a plurality of grooves arranged along the length direction of the handle, the fixing seat is provided with a receiving surface for receiving the handle, the receiving surface is provided with a protrusion for being inserted into the groove, the first elastic member includes a first spring sheet, the first spring sheet is connected to the fixing seat and is opposite to the protrusion, the first spring sheet abuts against the handle and is used to push the handle toward the protrusion to clamp the handle.

[0009] Preferably, the number of the protrusions is at least two, and the spacing between adjacent grooves is equal to the spacing between adjacent protrusions.

[0010] Preferably, the fixing seat is provided with a flange portion above the protrusion, and the lower surface of the flange portion abuts against the upper surface of the handle.

[0011] Preferably, the first clamp arm includes a first head and a first arm connected to each other, the second clamp arm includes a second head and a second arm connected to each other, the first arm and the second arm are hinged to each other, and the first head and the second head are respectively provided with the clamping groove.

[0012] Preferably, the nerve hook device also includes a hand-tightening bolt, the mounting seat is rotatably connected to the first head, the mounting seat is provided with an arc groove for the hand-tightening bolt to pass through, the first head is provided with a threaded through hole matching the hand-tightening bolt, and the end of the hand-tightening bolt is provided with an anti-slipping piece, and the outer dimensions of the anti-slipping piece are larger than the diameter of the threaded through hole.

[0013] Preferably, the locking component includes a locking arm and a second elastic member, the locking arm is hinged to the end of the second arm portion away from the second head portion, a plurality of locking teeth are provided on a side of the locking arm facing the second head portion, and the plurality of locking teeth are arranged along the length direction of the locking arm, a locking tip is provided at the end of the first arm portion away from the first head portion, the second elastic member is connected to the second arm portion and the locking arm, and the second elastic member is used to drive the locking arm to rotate in a direction close to the locking tip so that the locking tip is engaged between two adjacent locking teeth.

[0014] Preferably, the second elastic member comprises a second elastic sheet, and the second elastic sheet is mounted on the second arm portion and abuts against an end portion of the clamping arm close to the second arm portion.

[0015] Preferably, the rod portion includes a first rod portion and a second rod portion connected to each other, the first rod portion is vertically connected to the handle, the second rod portion is connected to the hook portion, the first rod portion and the second rod portion form a first angle, the second rod portion and the hook portion form a second angle, the first angle and the second angle are both obtuse angles, and a side of the hook portion facing the handle is parallel to the handle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The locking component keeps the first clamp arm and the second clamp arm in a clamped state, and can be clamped on a columnar object next to the operating table through the clamping groove, so that the position of the retractor can be fixed. The handle is detachably connected to the mounting seat, and different types of retractors can be replaced, and the position of the retractor can be adjusted according to surgical requirements. The doctor does not need to hold the retractor to stabilize it, which makes it convenient for the doctor to perform the surgery with both hands, thereby improving the efficiency of the surgery and helping to reduce the number of medical staff involved in the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic structural diagram of the nerve retractor device involved in the present invention;

[0020] Figure 2 is an exploded view of the nerve retractor device involved in the present invention;

[0021] Figure 3 is an exploded view of the nerve retractor device involved in the present invention from another perspective;

[0022] Figure 4 is an exploded view of the clamping assembly involved in the present invention;

[0023] Figure 5 It is a schematic structural diagram of the draw hook involved in the present invention.

[0024] Reference numerals:

[0025] 100-nerve hook device, 10-clamping assembly, 101-clamping groove, 11-first clamping arm, 111-first head, 1111-threaded through hole, 1112-pin hole, 112-first arm, 1121-clamping tip, 12-second clamping arm, 121-second head, 122-second arm, 1221-avoidance groove, 13-locking component, 131-clamping arm, 1311-clamping tooth, 1312-first inclined surface, 132-second spring sheet, 132 1-second inclined surface, 20-pull hook, 21-handle, 211-groove, 22-rod, 221-first rod, 222-second rod, 23-hook, 30-mounting seat, 301-arc groove, 302-rotating shaft hole, 303-countersunk through hole, 31-fixing pin, 40-fixing seat, 41-supporting surface, 42-protrusion, 43-eaves, 44-air-avoiding countersunk hole, 45-threaded hole, 50-first spring piece, 60-hand-tightened bolt, 61-anti-slip part. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] Figure 1 is a schematic structural diagram of a nerve retractor device 100 involved in the present invention; Figure 2 is an exploded view of the nerve retractor device 100 involved in the present invention; Figure 3 It is an exploded view of the nerve retractor device 100 involved in the present invention from another perspective.

[0029] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides a nerve retractor device 100 for minimally invasive spinal canal surgery, which includes: a clamping assembly 10, a retractor 20, a mounting seat 30, a fixing seat 40, a first elastic member and a hand-tightening bolt 60.

[0030] Figure 4 It is an exploded view of the clamping assembly 10 involved in the present invention.

[0031] The clamping assembly 10 includes a first clamping arm 11, a second clamping arm 12 and a locking component 13. The first clamping arm 11 and the second clamping arm 12 are hinged, and the first clamping arm 11 and the second clamping arm 12 are respectively provided with a clamping groove 101. The locking component 13 is connected to the first clamping arm 11 and the second clamping arm 12 and is used to keep the first clamping arm 11 and the second clamping arm 12 in a clamped state; a mounting seat 30 is connected to the first clamping arm 11 or the second clamping arm 12; the pull hook 20 includes a handle 21, a rod 22 and a hook 23, one end of the rod 22 is connected to the handle 21, and the other end is connected to the hook 23, the handle 21 and the hook 23 are located on the same side of the rod 22, and the handle 21 is detachably connected to the mounting seat 30.

[0032] In this embodiment, the locking component 13 keeps the first clamp arm 11 and the second clamp arm 12 in a clamped state, and can be clamped on a columnar object next to the operating table through the clamping groove 101, so that the position of the retractor 20 can be fixed. The handle 21 is detachably connected to the mounting seat 30, and different types of retractors 20 can be replaced. The position of the retractor 20 can be adjusted according to surgical requirements. The doctor does not need to hold the retractor 20 to stabilize it, which makes it convenient for the doctor to perform the surgery with both hands, thereby improving the efficiency of the surgery and helping to reduce the number of medical staff involved in the surgery.

[0033] Usually, a fixing frame is arranged next to the operating table, and a fixing column extends from the fixing frame, and the cross-sectional shape of the fixing column can be circular or square. The clamping groove 101 on the first clamp arm 11 and the second clamp arm 12 can be a semicircular groove or a "V"-shaped groove. Preferably, the clamping groove 101 is a "V"-shaped groove, which can clamp a circular or square fixing column. In some examples, the cross-sectional shape of the fixing column is square, and the edges face upward, and the clamping groove 101 is a 90° "V"-shaped groove. The "V"-shaped groove cooperates with the two side surfaces of the square fixing column to limit the angle of the first clamp arm 11 and the second clamp arm 12, so that the mounting seat 30 and the handle 21 are placed horizontally, which is convenient for the doctor to adjust the retractor 20.

[0034] The fixing seat 40 is connected to the mounting seat 30, the handle 21 is movably connected to the fixing seat 40, and the first elastic member is connected to the fixing seat 40 and cooperates with the fixing seat 40 to clamp the handle 21. The first elastic member and the fixing seat 40 cooperate to form an elastic clamping mechanism for clamping the handle 21, and the doctor can adjust the extension length of the handle 21 according to the surgical needs to adjust the position of the retractor 20. In some examples, the first elastic member can be a spring mechanism. Preferably, the edge of the handle 21 is provided with a plurality of grooves 211 arranged along the length direction of the handle 21, the fixing seat 40 is provided with a receiving surface 41 for receiving the handle 21, and the receiving surface 41 is provided with a protrusion 42 for being inserted into the groove 211, and the first elastic member includes a first elastic sheet 50, the first elastic sheet 50 is connected to the fixing seat 40 and opposite to the protrusion 42, and the first elastic sheet 50 abuts against the handle 21 and is used to push the handle 21 toward the protrusion 42 to clamp the handle 21. The handle 21 is placed on the receiving surface 41, and the first spring piece 50 pushes the handle 21 toward the protrusion 42. The groove 211 on the handle 21 is engaged with the protrusion 42, which can clamp the handle 21 and fix the position of the handle 21, prevent the retractor 20 from accidentally moving during the operation, and help improve the safety of the operation. The first spring piece 50 can be made of spring steel and installed on the side of the fixing seat 40 by screws. The first spring piece 50 is bent toward the fixing seat 40 to form an arc surface that abuts the side of the handle 21. Preferably, the number of protrusions 42 is at least two, and the spacing between adjacent grooves 211 is equal to the spacing between adjacent protrusions 42. In this way, the reliability of the fixation of the handle 21 can be improved. Preferably, the fixing seat 40 is provided with a flange 43 above the protrusion 42, and the lower surface of the flange 43 abuts against the upper surface of the handle 21. The flange 43 can prevent the handle 21 from being collided and falling out, which can further improve the safety of the operation. When in use, the first spring piece 50 is pried apart, and the handle 21 can be clamped into the clamping groove formed by the first spring piece 50 and the fixing seat 40. The groove 211 on the handle 21 is clamped with the protrusion 42, and the eaves 43 can prevent the handle 21 from slipping out upwards. The first spring piece 50 can be slightly pried apart to move the handle 21 so that different grooves 211 are clamped with the protrusion 42. After releasing the handle, the first spring piece 50 can clamp the handle 21 again, thereby adjusting the extended length of the handle 21.

[0035] The first clamp arm 11 includes a first head 111 and a first arm 112 connected to each other, and the second clamp arm 12 includes a second head 121 and a second arm 122 connected to each other. The first arm 112 and the second arm 122 are hinged to each other. The first head 111 and the second head 121 are respectively provided with a clamping groove 101, and the clamping groove 101 is a 90° "V"-shaped groove. The first arm 112 and the second arm 122 can be cross-hinged, similar to the structure of pliers. The first head 111 and the second head 121 can have a longer length, which can improve the stability and reliability of the clamping column. The mounting seat 30 is rotatably connected to the first head 111, and the mounting seat 30 is provided with an arc groove 301 for the hand screw bolt 60 to pass through. The first head 111 is provided with a threaded through hole 1111 that cooperates with the hand screw bolt 60, and the end of the hand screw bolt 60 is provided with an anti-slip member 61, and the outer size of the anti-slip member 61 is greater than the diameter of the threaded through hole 1111. The bottom of the fixing seat 40 may be provided with two threaded holes 45, and the bottom of the mounting seat 30 may be provided with two corresponding countersunk through holes 303, and the mounting seat 30 may be fixedly connected with the fixing seat 40 by two flat head screws. The fixing pin 31 is in the shape of a stepped shaft and has a head with a larger diameter. The bottom of the fixing seat 40 may be provided with a hollow countersunk hole 44 for accommodating the head of the fixing pin 31, and the mounting seat 30 is provided with a rotating shaft hole 302 for the fixing pin 31 to pass through, and the first head 111 is provided with a pin hole 1112 that is interference-fitted with the fixing pin 31. Before connecting the mounting seat 30 with the fixing seat 40, the fixing pin 31 is first passed through the mounting seat 30, and the head of the fixing pin 31 is pre-set in the hollow countersunk hole 44. Thus, the fixing seat 40, the mounting seat 30 and the first head 111 are connected in sequence, and the mounting seat 30 can rotate relative to the first head 111 around the fixing pin 31. This connection structure can make the thickness of the mounting seat 30 not too thick, so as to reduce the weight of the nerve hook device 100 and make it light to use. The center of the arc groove 301 coincides with the center of the fixed pin 31. Loosen the hand screw 60, the mounting seat 30 can rotate around the fixed pin 31 relative to the first head 111, the angle of the left and right deflection of the handle 21 can be adjusted, and the retractor 20 can obtain a better position. After adjusting the angle, tighten the hand screw 60 to fix the mounting seat 30 to stabilize the position of the retractor 20. The doctor can adjust the extension length and the left and right deflection angle of the handle 21 according to the needs of the operation. The retractor 20 can move the nerve to the best position, which is convenient for surgical operation and helps to reduce the risk of surgery. In some examples, the handle 21 can be deflected 45° to the left and right. The end of the hand screw bolt 60 is provided with an anti-slip member 61, which is used to prevent the hand screw bolt 60 from slipping out of the threaded through hole 1111 of the first head 111. The anti-slip member 61 can be a bayonet that passes through the hand screw bolt 60 horizontally, and the length of the bayonet is greater than the diameter of the threaded through hole 1111. The anti-dropping member 61 may also be a retaining spring engaged on the hand-tightening bolt 60 .

[0036] The locking component 13 includes a locking arm 131 and a second elastic member. The locking arm 131 is hinged to the end of the second arm portion 122 away from the second head portion 121. A plurality of locking teeth 1311 are provided on the side of the locking arm 131 facing the second head portion 121. The plurality of locking teeth 1311 are arranged along the length direction of the locking arm 131. A locking tip 1121 is provided at the end of the first arm portion 112 away from the first head portion 111. The second elastic member is connected to the second arm portion 122 and the locking arm 131. The second elastic member is used to drive the locking arm 131 to rotate in a direction close to the locking tip 1121 so that the locking tip 1121 is engaged between two adjacent locking teeth 1311. When in use, the elastic force of the second elastic member is overcome, the clamp arm 131 is opened in the direction away from the clamp tip 1121, the first arm portion 112 and the second arm portion 122 are pinched, and the clamping groove 101 of the first head portion 111 and the second head portion 121 is clamped to the fixed column. When the clamp arm 131 is released, the second elastic member drives the clamp arm 131 to rotate in the direction close to the clamp tip 1121 so that the clamp tip 1121 is clamped between two adjacent clamp teeth 1311, thereby enabling the nerve hook device 100 to clamp and lock the fixed column. In some examples, the second elastic member can be a spring mechanism. Preferably, the second elastic member includes a second elastic sheet 132, which is mounted on the second arm portion 122 and abuts against the end of the clamp arm 131 close to the second arm portion 122. The second elastic sheet 132 generates an elastic force on the upper end of the clamp arm 131 to drive the clamp arm 131 to rotate in the direction close to the clamp tip 1121. The upper end of the clamp arm 131 may be provided with a first inclined surface 1312 facing the second elastic sheet 132, and the second elastic sheet 132 may be bent to form a second inclined surface 1321 abutting against the first inclined surface 1312, and the second inclined surface 1321 generates an elastic force on the first inclined surface 1312, thereby driving the clamp arm 131 to rotate in a direction close to the clamp tip 1121 to achieve clamping and locking. The second elastic sheet 132 may be made of spring steel. The end of the second arm 122 may be provided with an avoidance groove 1221 for avoiding the second elastic sheet 132 and the upper end of the clamp arm 131. In other examples, the locking component 13 may include a tension spring, the two ends of which are respectively connected to the first arm 112 and the second arm 122, and the tension spring is used to keep the first head 111 and the second head 121 in a clamped state to clamp the fixing column.

[0037] Figure 5 It is a schematic structural diagram of the drag hook 20 involved in the present invention.

[0038] The retractor 20 includes a handle 21, a rod 22 and a hook 23. One end of the rod 22 is connected to the handle 21, and the other end is connected to the hook 23. The handle 21 and the hook 23 are located on the same side of the rod 22. Thus, the hook 23 can hook the nerve and pull it toward the handle 21. The rod 22 includes a first rod 221 and a second rod 222 connected to each other. The first rod 221 is vertically connected to the handle 21, and the second rod 222 is connected to the hook 23. The first rod 221 and the second rod 222 form a first angle θ, and the second rod 222 and the hook 23 form a second angle α. Both the first angle θ and the second angle α are obtuse angles, and the side of the hook 23 facing the handle 21 is parallel to the handle 21. The side of the hook 23 facing the handle 21 is parallel to the handle 21, so that the hook 23 can hook the nerve without sinking, thereby avoiding damage to the nerve and the tissues beside the nerve. The first rod 221 and the second rod 222 form a first angle θ, which is an obtuse angle, which can improve the success rate of the hook 23 hooking the nerve. The second rod 222 and the hook 23 form a second angle α, which is an obtuse angle, which can facilitate the insertion of the hook 23 under the nerve, which is conducive to improving the efficiency of the hook 23 hooking the nerve. From the first rod 221, the second rod 222 to the hook 23, the width gradually decreases, so that the retractor 20 has sufficient strength, and the hook 23 is relatively small and easy to operate. The bottom surface of the hook 23 is an arc surface, and the edges of the first rod 221, the second rod 222 and the hook 23 are all rounded to avoid damaging the nerve or other tissues.

[0039] In this embodiment, the locking component 13 keeps the first clamp arm 11 and the second clamp arm 12 in a clamped state, and can be clamped on a columnar object next to the operating table through the clamping groove 101, so that the position of the retractor 20 can be fixed. The handle 21 is detachably connected to the mounting seat 30, and different types of retractors 20 can be replaced. The position of the retractor 20 can be adjusted according to surgical requirements. The doctor does not need to hold the retractor 20 to stabilize it, which makes it convenient for the doctor to perform the surgery with both hands, thereby improving the efficiency of the surgery and helping to reduce the number of medical staff involved in the surgery.

[0040] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A nerve retractor device, characterized in that: include: A clamping assembly, comprising a first clamping arm, a second clamping arm and a locking component, wherein the first clamping arm and the second clamping arm are hinged, the first clamping arm and the second clamping arm are respectively provided with a clamping groove, and the locking component is connected to the first clamping arm and the second clamping arm and is used to keep the first clamping arm and the second clamping arm in a clamped state; A mounting seat connected to the first clamping arm; A retractor, comprising a handle, a rod and a hook, wherein one end of the rod is connected to the handle, and the other end is connected to the hook, the handle and the hook are located on the same side of the rod, and the handle is detachably connected to the mounting seat; A fixing seat and a first elastic member, wherein the fixing seat is connected to the mounting seat, the handle is movably connected to the fixing seat, and the first elastic member is connected to the fixing seat and cooperates with the fixing seat to clamp the handle; The bottom of the fixing seat is provided with two threaded holes, and the bottom of the mounting seat is provided with two countersunk through holes corresponding to the two threaded holes, and the mounting seat is fixedly connected to the fixing seat by two flat head screws; The edge of the handle is provided with a plurality of grooves arranged along the length direction of the handle, the fixing seat is provided with a receiving surface for receiving the handle, the receiving surface is provided with a protrusion for being inserted into the groove, the first elastic member comprises a first elastic sheet, the first elastic sheet is connected to the fixing seat and is opposite to the protrusion, the first elastic sheet abuts against the handle and is used to push the handle toward the protrusion to clamp the handle; The number of the protrusions is at least two, and the spacing between adjacent grooves is equal to the spacing between adjacent protrusions; The first clamp arm comprises a first head and a first arm portion connected to each other, the second clamp arm comprises a second head and a second arm portion connected to each other, the first arm portion and the second arm portion are hinged to each other, and the first head and the second head portion are respectively provided with the clamping groove; Furthermore, the nerve hook device further comprises a hand-tightening bolt, the mounting seat is rotatably connected to the first head, the mounting seat is provided with an arc groove for the hand-tightening bolt to pass through, the first head is provided with a threaded through hole matched with the hand-tightening bolt, an anti-slipping piece is provided at the end of the hand-tightening bolt, and the outer dimensions of the anti-slipping piece are larger than the diameter of the threaded through hole; The locking component includes a locking arm and a second elastic member, the locking arm is hinged to the end of the second arm away from the second head, a plurality of locking teeth are provided on a side of the locking arm facing the second head, and the plurality of locking teeth are arranged along the length direction of the locking arm, a locking tip is provided at the end of the first arm away from the first head, the second elastic member is connected to the second arm and the locking arm, and the second elastic member is used to drive the locking arm to rotate in a direction close to the locking tip so that the locking tip is engaged between two adjacent locking teeth.

2. The nerve retractor device according to claim 1, characterized in that: The fixing seat is provided with a flange portion above the protrusion, and the lower surface of the flange portion abuts against the upper surface of the handle.

3. The nerve retractor device according to claim 1, characterized in that: The second elastic member includes a second elastic sheet, which is mounted on the second arm portion and abuts against an end portion of the clamping arm close to the second arm portion.

4. The nerve retractor device according to any one of claims 1 to 3, characterized in that: The rod portion includes a first rod portion and a second rod portion connected to each other, the first rod portion is vertically connected to the handle, the second rod portion is connected to the hook portion, the first rod portion and the second rod portion form a first angle, the second rod portion and the hook portion form a second angle, the first angle and the second angle are both obtuse angles, and a side of the hook portion facing the handle is parallel to the handle.

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