Nerve retractor retractor suitable for brain surgery

Abstract

The invention relates to the field of medical instruments, in particular to a nerve retractor retractor suitable for brain surgery, which comprises a base, a headrest fixedly arranged in the center of the upper end of the base, a semicircular support frame rotatably mounted at two ends of the headrest, rotating shafts fixedly arranged on two sides of the support frame, and limiting slide rails fixedly arranged on two sides of the upper end of the base. A movable shaft is linearly and slidably installed between the two limiting sliding rails, a push-pull air cylinder is fixedly arranged at the upper end of the base, the output end of the push-pull air cylinder is fixedly connected with the center of the movable shaft, the two ends of the movable shaft are rotationally matched with one ends of angle adjusting connecting rods, and the other ends of the angle adjusting connecting rods are rotationally matched with the corresponding rotating shafts; the crawling frame crawl along the cambered surface of the supporting frame. The multi-dimensional and multi-azimuth angle adjusting process can be achieved on the retractor body, the retractor body is made to maintain the correct traction direction all the time so as to cope with wounds of different areas and different angles on the head of a patient, the application range is wide, and practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a nerve retractor device suitable for brain surgery. Background Art

[0002] Brain surgery generally refers to neurosurgery. The research scope of neurosurgery includes the etiology and pathogenesis of diseases such as congenital developmental abnormalities, trauma, infections, tumors, vascular diseases, and genetic metabolic disorders of the nervous system. Brain surgery is a science that uses surgical methods, with surgery as the main treatment means, to study diseases of the brain, spinal cord, and peripheral nervous system. Clinically, when performing brain surgery on patients, a retractor is mostly used to retract the scalp to expose the surgical field.

[0003] Chinese Patent with publication number CN114376630A discloses a nerve retractor device for brain surgery, including a bottom plate. The upper end surface of the bottom plate is fixedly connected with a fixed seat. The upper end surface of the fixed seat is provided with a headrest groove in an arc structure. The upper end surfaces of both telescopic rods are fixedly connected with fixed seats. When the rotating seat rotates clockwise, it drives the two movable rods to move relatively, and the two movable rods always move synchronously, so as to achieve the purpose of synchronously controlling the two retraction forceps. By the telescopic movement of the cylinder to drive the connecting rod to move independently, the purpose of independently controlling any one of the retraction forceps can be achieved. During the use of the above device, the retraction process of the two groups of retraction forceps always proceeds in a fixed direction. When the wound direction on the patient's head is not perpendicular to this fixed direction, it will be difficult for the retraction forceps to achieve a stable retraction process on the scalp at this time, and the angle of the retraction forceps cannot be adjusted, and it cannot cope with the wound parts on both sides of the patient's head. Summary of the Invention

[0004] The purpose of the present invention is to provide a nerve retractor device suitable for brain surgery, aiming to solve the above technical problems.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The yoke is provided with a support frame which is symmetrical with respect to the bottom of the support frame, and a pull-out cylinder is provided on the top of the support frame, and an output end of the pull-out cylinder is fixedly connected to the center of the movable shaft, and both ends of the movable shaft are rotatably matched with one end of an angle adjustment connecting rod, and the other end of the angle adjustment connecting rod is rotatably matched with the corresponding rotating shaft. A crawling frame is provided on the support frame, and the crawling frame crawls along the arc surface of the support frame, and an angle adjustment shaft is rotatably installed at the bottom of the crawling frame, and a shell is fixedly connected to the bottom of the angle adjustment shaft, and a pair of pull-out hook bodies are symmetrically arranged below the shell, and a pull-out assembly is provided inside the shell, and both ends of the pull-out assembly are respectively connected to the corresponding pull-out hook bodies.

[0007] The retraction assembly includes a piston cylinder, a sliding rod is fixedly arranged inside the shell, the sliding rod coaxially passes through the piston cylinder, a pair of sliding pistons are slidably arranged inside the piston cylinder, the sliding pistons divide the inner cavity of the piston cylinder into a left chamber, a middle chamber and a right chamber respectively, the left chamber, the middle chamber and the right chamber are connected with ventilation joints respectively, sliding blocks are slidably installed at both ends of the sliding rod, the end of the sliding piston away from the middle chamber is connected to the corresponding sliding block through a sleeve rod, the sliding block is connected to the corresponding retractor body, and a displacement sensor is fixedly arranged on the upper end of the sliding block.

[0008] As a further solution of the present invention: the sleeve rod is a hollow rod, which is slidably mounted on the slide rod and coaxially penetrates the piston cross cylinder and is connected to the slide block.

[0009] As a further solution of the present invention: the piston cylinder is fixedly connected to the housing through a fixing seat, a sliding seal ring 1 is arranged between the outer wall of the sleeve rod and the piston cylinder, and a sliding seal ring 2 is arranged between the sliding blocks.

[0010] As a further solution of the present invention: a limit plate is arranged above the hook body, an electric lifter is fixedly arranged at the bottom of one end of the limit plate, the output end of the electric lifter is connected to the top of the hook body, the other end of the limit plate is fixedly connected to a connecting plate, and the top of the connecting plate is fixedly connected to the sliding block.

[0011] As a further solution of the present invention: a group of limit blocks are fixedly arranged at both ends of the bottom of the shell, the limit plates are linearly slidably installed on the corresponding limit blocks, and the two ends of the bottom of the shell are penetrated by means of give-way grooves, and the connecting plates are linearly slidably installed in the corresponding give-way grooves.

[0012] As a further solution of the present invention: a crawling motor is fixedly arranged on one side of the crawling frame, a crawling gear is fixedly connected to the output end of the crawling motor, a crawling tooth groove is arranged on the inner wall of the crawling frame, and the crawling gear is meshed with the crawling tooth groove.

[0013] As a further solution of the present invention: an angle adjustment motor is fixedly arranged on the crawling frame, a driving gear is fixedly connected to the output end of the angle adjustment motor, a synchronous gear is fixedly sleeved on the angle adjustment shaft, and a transmission belt is arranged between the driving gear and the synchronous gear.

[0014] As a further solution of the present invention: a limiting shaft is rotatably installed in the crawling frame, rollers are fixedly connected at both ends of the limiting shaft, a limiting groove plate is arranged on the outer wall of the crawling frame along the circumferential direction, the limiting shaft is adapted to be slidably installed in the limiting groove plate, and the roller rolls against the outer wall of the crawling frame.

[0015] As a further solution of the present invention: a rubber pad is provided on the surface of the headrest.

[0016] Beneficial effects of the present invention:

[0017] (1) By providing an angle adjustment connecting rod, a crawling frame and an angle adjustment shaft, when the patient is undergoing a brain surgery, the push-pull cylinder drives the movable shaft to make a linear motion in the limit slide rail, and the movable shaft drives the support frame as a whole to swing through the angle adjustment connecting rod. At the same time, the crawling frame is used to crawl along the support frame to change the position of the retractor body, and the angle adjustment shaft drives the shell to rotate until the linear direction of the shell is perpendicular to the direction of the wound on the patient's head. At this time, the retraction component is used to drive the retractor body to move in opposite directions to achieve the traction process of the scalp at the wound site. The swinging process of the support frame, the crawling process of the crawling frame and the rotation process of the shell are linked and coordinated with each other, and the retractor body can achieve a multi-dimensional and multi-directional angle adjustment process, so that the retractor body always maintains the correct pulling direction to cope with wounds in different areas and at different angles on the patient's head. The application range is wide and the practicality is strong.

[0018] (2) By setting up the retractor assembly, when the scalp at the surgical wound site is retracted by the retractor main body, in the initial state, the air pressures in the three chambers are balanced, and the sliding pistons are symmetrically arranged. When air is added to the middle chamber, equal pressure differences will be formed between the middle chamber and the left chamber as well as the right chamber respectively. When unequal amounts of gas are extracted from the left chamber and the right chamber respectively, unequal pressure differences will be formed between the left chamber and the right chamber and the middle chamber respectively at this time. Thus, by using the pressure difference changes between the middle chamber and the left chamber as well as the right chamber, the equal-distance synchronous retraction process of the two groups of retractor main bodies can be controlled, or the retraction movements of the two groups of retractor main bodies with different strokes can be controlled respectively, so as to meet the surgical requirements in different situations, with high applicability. And the retraction displacement distance is monitored in real time by the displacement sensor to help improve the retraction accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is the overall structural schematic diagram of the present invention.

[0021] Figure 2 is the structural schematic diagram of the support frame in the present invention.

[0022] Figure 3 is the structural schematic diagram of the crawling frame in the present invention.

[0023] Figure 4 is the structural schematic diagram of the bottom of the housing in the present invention.

[0024] Figure 5 is the state schematic diagram when the angle of the present invention is adjusted.

[0025] Figure 6 is the internal structural schematic diagram of the housing in the present invention.

[0026] Figure 7 is the internal structural schematic diagram of the piston cross tube in the present invention.

[0027] Figure 8 is the structural schematic diagram of the sliding block in the present invention.

[0028] In the figure: 1. Base; 101. Limit slide rail; 102. Push-pull cylinder; 2. Headrest; 3. Support frame; 301. Rotating shaft; 302. Limit groove plate; 303. Crawling tooth groove; 4. Angle-adjusting connecting rod; 5. Moving shaft; 6. Crawling frame; 601. Crawling motor; 602. Limit shaft; 603. Roller; 604. Crawling gear; 605. Angle-adjusting motor; 606. Angle-adjusting shaft; 607. Synchronous gear; 608. Transmission belt; 7. Housing; 701. Limit block; 702. Yielding chute; 703. Slide bar; 8. Hook main body; 801. Limit plate; 802. Connecting plate; 803. Electric lifter; 9. Retractor assembly; 910. Piston cross cylinder; 911. Fixed seat; 912. Ventilation joint; 913. Sliding piston; 914. Left chamber; 915. Middle chamber; 916. Right chamber; 917. Sleeve rod; 918. First sliding seal ring; 920. Sliding block; 921. Displacement sensor; 922. Second sliding seal ring. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown in, the present invention is a nerve retractor device applicable to neurosurgery, including a base 1. A headrest 2 is fixedly arranged at the center of the upper end of the base 1. Both ends of the headrest 2 are rotatably installed with a semi-circular support frame 3. Rotating shafts 301 are fixedly arranged on both sides of the support frame 3. Limit slide rails 101 are fixedly arranged on both sides of the upper end of the base 1. A moving shaft 5 is linearly slidably installed between the two limit slide rails 101. A push-pull cylinder 102 is fixedly arranged at the upper end of the base 1. The output end of the push-pull cylinder 102 is fixedly connected to the center of the moving shaft 5. Both ends of the moving shaft 5 are rotatably matched with one end of an angle-adjusting connecting rod 4. The other end of the angle-adjusting connecting rod 4 is rotatably matched with the corresponding rotating shaft 301. A crawling frame 6 is arranged on the support frame 3. The crawling frame 6 crawls along the arc surface of the support frame 3. A bottom of the crawling frame 6 is rotatably installed with an angle-adjusting shaft 606. The bottom of the angle-adjusting shaft 606 is fixedly connected to a housing 7. A pair of hook main bodies 8 are symmetrically arranged below the housing 7. A retractor assembly 9 is arranged inside the housing 7. Both ends of the retractor assembly 9 are respectively connected to the corresponding hook main bodies 8.

[0031] Specifically, by providing an angle adjustment connecting rod 4, a climbing frame 6 and an angle adjustment shaft 606, when the patient is undergoing brain surgery, the push-pull cylinder 102 drives the movable shaft 5 to make a linear motion in the limiting slide rail 101, and the movable shaft 5 will drive the support frame 3 to swing as a whole through the angle adjustment connecting rod 4, and at the same time, the climbing frame 6 is used to crawl along the support frame 3 to change the position of the adjustment hook body 8, and the angle adjustment shaft 606 is used to drive the shell 7 to rotate until the linear direction of the shell 7 is perpendicular to the direction of the wound on the patient's head. At this time, the retraction component 9 is used to drive the retractor body 8 to move toward each other to realize the traction process of the scalp at the wound site. The swinging process of the support frame 3, the crawling process of the climbing frame 6 and the rotation process of the shell 7 are linked and coordinated with each other, and the retractor body 8 can realize a multi-dimensional and multi-directional angle adjustment process, so that the retractor body 8 always maintains the correct traction direction to cope with wounds in different areas and angles on the patient's head. It has a wide range of applications and strong practicality.

[0032] like Figure 6 , Figure 7 and Figure 8 As shown, the retraction assembly 9 includes a piston cylinder 910, a sliding rod 703 is fixedly arranged inside the shell 7, the sliding rod 703 coaxially passes through the piston cylinder 910, a pair of sliding pistons 913 are slidably arranged inside the piston cylinder 910, the sliding pistons 913 respectively divide the inner cavity of the piston cylinder 910 into a left chamber 914, a middle chamber 915 and a right chamber 916 in sequence, the left chamber 914, the middle chamber 915 and the right chamber 916 are respectively connected with ventilation joints 912, sliding blocks 920 are slidably installed at both ends of the sliding rod 703, the end of the sliding piston 913 away from the middle chamber 915 is connected to the corresponding sliding block 920 through a sleeve rod 917, the sliding block 920 is connected to the corresponding retractor body 8, and a displacement sensor 921 is fixedly arranged on the upper end of the sliding block 920.

[0033] Specifically, by setting the retractor assembly 9, when the scalp at the surgical wound site is retracted by the retractor main body 8, since the inner cavity of the piston cross cylinder 910 is divided into left, middle, and right chambers by a pair of sliding pistons 913, in the initial state, the air pressures in the three chambers are balanced, and the sliding pistons 913 are symmetrically arranged. When air is added to the middle chamber 915, equal pressure differences will be formed between the middle chamber 915 and the left chamber 914 and the right chamber 916 respectively. The gas pressure will drive the two groups of sliding pistons 913 to move towards each other, so as to drive the retractor main body 8 to achieve synchronous retraction movement towards each other through the sleeve rod 917 and the sliding block 920. When unequal amounts of gas are extracted from the left chamber 914 and the right chamber 916 respectively, at this time, unequal pressure differences will be formed between the left chamber 914 and the right chamber 916 and the middle chamber 915 respectively. The gas pressure will drive the corresponding retractor main body 8 to perform retraction displacements of different distances respectively. Thus, by using the pressure difference changes between the middle chamber 915 and the left chamber 914 and the right chamber 916, the equal-distance synchronous retraction process of the two groups of retractor main bodies 8 can be controlled, or the retraction movements of the two groups of retractor main bodies 8 with different strokes can be controlled respectively, so as to meet the surgical requirements in different situations, with high applicability. And the displacement sensor 921 is used to monitor the retraction displacement distance in real time, which is beneficial to improving the retraction accuracy.

[0034] As Figure 7 and Figure 8 shown, the sleeve rod 917 is a hollow rod, and the sleeve rod 917 is slidably installed on the slide rod 703 and coaxially penetrates through the piston cross cylinder 910 and is connected to the sliding block 920.

[0035] Furthermore, the piston cross cylinder 910 is fixedly connected to the housing 7 through the fixed seat 911. A first sliding sealing ring 918 is arranged between the outer wall of the sleeve rod 917 and the piston cross cylinder 910, and a second sliding sealing ring 922 is arranged between the sliding block 920 and the sliding block 920.

[0036] Specifically, since the piston cross cylinder 910 is placed horizontally, the hollow structure of the sleeve rod 917 can enable the slide rod 703 to provide a stable support and limiting effect on the sleeve rod 917 and the sliding block 920, so as to eliminate the adverse effects of the gravity on the horizontal movement process of the sleeve rod 917, and enable the sleeve rod 917 and the sliding block 920 to achieve a balanced and stable horizontal displacement process. At the same time, by using the first sliding sealing ring 918 and the second sliding sealing ring 922, the airtightness can be effectively improved, and the displacement accuracy of the sliding piston 913 under the action of the pressure difference can be ensured.

[0037] As Figure 8As shown, a limit plate 801 is arranged above the hook body 8, an electric lifter 803 is fixedly arranged at the bottom of one end of the limit plate 801, the output end of the electric lifter 803 is connected to the top of the hook body 8, and the other end of the limit plate 801 is fixedly connected to a connecting plate 802, and the top of the connecting plate 802 is fixedly connected to the sliding block 920.

[0038] like Figure 4 As shown, a group of limit blocks 701 are fixedly provided at both ends of the bottom of the shell 7, and the limit plates 801 are linearly slidably installed on the corresponding limit blocks 701. The two ends of the bottom of the shell 7 are penetrated by a clearance groove 702, and the connecting plate 802 is linearly slidably installed in the corresponding clearance groove 702.

[0039] Specifically, the electric lifter 803 can control the hook body 8 to perform lifting and lowering movements to adjust the distance between the hook body 8 and the wound skin. During the pulling process, the yielding groove 702 constrains the connecting plate 802 to move in the correct direction. At the same time, the limiting plate 801 also always keeps sliding in the limiting block 701, thereby improving the stability of the hook body 8 during the pulling process.

[0040] like Figure 3 As shown, a creeping motor 601 is fixedly provided on one side of the creeping frame 6, a creeping gear 604 is fixedly connected to the output end of the creeping motor 601, a creeping tooth groove 303 is provided on the inner wall of the creeping frame 6, and the creeping gear 604 is meshed with the creeping tooth groove 303.

[0041] Furthermore, a limit shaft 602 is rotatably installed in the climbing frame 6, and rollers 603 are fixedly connected at both ends of the limit shaft 602. A limit groove plate 302 is arranged along the circumferential direction on the outer wall of the climbing frame 6. The limit shaft 602 is adapted to be slidably installed in the limit groove plate 302, and the roller 603 rolls against the outer wall of the climbing frame 6.

[0042] Specifically, when crawling, the crawling motor 601 is started, driving the crawling gear 604 to rotate. The crawling gear 604 drives the crawling frame 6 as a whole to crawl along the support frame 3 through the meshing action with the crawling tooth groove 303. During this process, the limit shaft 602 always keeps sliding in the limit groove plate 302. At the same time, the roller 603 will also roll along the outer wall of the support frame 3 as the crawling frame 6 crawls, thereby being able to support and limit the crawling frame 6 to ensure its stability during the crawling process.

[0043] like Figure 3 As shown, an angle adjustment motor 605 is fixedly installed on the crawling frame 6, and a driving gear is fixedly connected to the output end of the angle adjustment motor 605. A synchronous gear 607 is fixedly sleeved on the angle adjustment shaft 606, and a transmission belt 608 is arranged between the driving gear and the synchronous gear 607.

[0044] Specifically, when the angle adjustment motor 605 is started, it will drive the driving gear to rotate, and the driving gear will drive the synchronous gear 607 to rotate through the transmission belt 608, and then drive the angle adjustment shaft 606 to rotate, so that the shell 7 can rotate to adjust the azimuth angle of the retractor body 8 until the linear movement direction of the retractor body 8 is perpendicular to the wound direction, so as to ensure better traction of the scalp.

[0045] In this embodiment, a rubber pad is provided on the surface of the headrest 2, which can provide flexible support for the patient's head and improve comfort.

[0046] The working principle of the present invention is as follows: Figures 1 - 8 As shown, when the patient is preparing for brain surgery, the head pillow rests on the head pillow 2, and the push-pull cylinder 102 drives the movable shaft 5 to make a linear motion in the limiting slide rail 101. The movable shaft 5 will drive the support frame 3 to swing as a whole through the angle adjustment connecting rod 4, and at the same time, the crawling frame 6 is used to crawl along the support frame 3 to change the position of the adjustment hook body 8, and the shell 7 is driven to rotate through the angle adjustment shaft 606 until the linear direction of the shell 7 is perpendicular to the direction of the wound on the patient's head. At this time, the retraction component 9 is used to drive the retractor body 8 to move toward each other to realize the traction process of the scalp at the wound site. The swinging process of the support frame 3, the crawling process of the crawling frame 6 and the rotation process of the shell 7 are linked and coordinated with each other, and the retractor body 8 can realize a multi-dimensional and multi-directional angle adjustment process, so that the retractor body 8 always maintains the correct traction direction to cope with wounds in different areas and angles on the patient's head. In the initial state, the air pressure in the three chambers is balanced, and the sliding pistons 913 are symmetrically arranged. When the retractor body 8 pulls the scalp at the surgical wound, when air is added to the middle chamber 915, the middle chamber 915 will form an equal pressure difference with the left chamber 914 and the right chamber 916, and the gas pressure will drive the two sets of sliding pistons 913 to move toward each other, thereby driving the retractor body 8 to achieve synchronous pulling movement toward each other through the sleeve rod 917 and the sliding block 920. When unequal amounts of gas are extracted, unequal pressure differences will be formed between the left chamber 914 and the right chamber 916 and the respective middle chamber 915, and the gas pressure will drive the corresponding retractor bodies 8 to perform a pulling displacement process of different distances. By utilizing the pressure difference change between the middle chamber 915 and the left chamber 914 and the right chamber 916, the two groups of retractor bodies 8 can be controlled to perform an equidistant and synchronous pulling process, or the two groups of retractor bodies 8 can be controlled to perform pulling movements of different strokes, thereby meeting surgical needs in different situations.

[0047] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A nerve retractor device suitable for brain surgery, comprising a base (1), a headrest (2) fixedly arranged at the center of the upper end of the base (1), characterized in that: A support frame (3) arranged in a semicircular shape is rotatably mounted at both ends of the headrest (2), a rotating shaft (301) is fixedly mounted on both sides of the support frame (3), a limiting slide rail (101) is fixedly mounted on both sides of the upper end of the base (1), a movable shaft (5) is linearly slidably mounted between the two limiting slide rails (101), a push-pull cylinder (102) is fixedly mounted on the upper end of the base (1), the output end of the push-pull cylinder (102) is fixedly connected to the center of the movable shaft (5), both ends of the movable shaft (5) are rotatably matched with one end of the angle adjustment connecting rod (4), and the The other end of the angle adjustment connecting rod (4) is rotatably matched with the corresponding rotating shaft (301), and a crawling frame (6) is arranged on the support frame (3), and the crawling frame (6) crawls along the arc surface of the support frame (3). An angle adjustment shaft (606) is rotatably installed at the bottom of the crawling frame (6), and a shell (7) is fixedly connected to the bottom of the angle adjustment shaft (606). A pair of retracting hook bodies (8) are symmetrically arranged below the shell (7), and a retraction assembly (9) is arranged inside the shell (7), and the two ends of the retraction assembly (9) are respectively connected to the corresponding retracting hook bodies (8); The retraction assembly (9) comprises a piston cylinder (910), a sliding rod (703) is fixedly arranged inside the housing (7), the sliding rod (703) coaxially passes through the piston cylinder (910), a pair of sliding pistons (913) are slidably arranged inside the piston cylinder (910), and the sliding pistons (913) respectively divide the inner cavity of the piston cylinder (910) into a left chamber (914), a middle chamber (915) and a right chamber (916), the left chamber (914) ), the middle chamber (915) and the right chamber (916) are respectively connected with ventilation joints (912), sliding blocks (920) are slidably installed at both ends of the sliding rod (703), the end of the sliding piston (913) away from the middle chamber (915) is connected to the corresponding sliding block (920) through a sleeve rod (917), the sliding block (920) is connected to the corresponding hook body (8), and a displacement sensor (921) is fixedly arranged on the upper end of the sliding block (920).

2. The nerve retractor device suitable for brain surgery according to claim 1, characterized in that: The sleeve rod (917) is a hollow rod, which is slidably mounted on the slide rod (703) and coaxially penetrates the piston cylinder (910) and is connected to the slide block (920).

3. The nerve retractor device suitable for brain surgery according to claim 2, characterized in that: The piston cylinder (910) is fixedly connected to the housing (7) via a fixed seat (911), a sliding seal ring 1 (918) is provided between the outer wall of the sleeve rod (917) and the piston cylinder (910), and a sliding seal ring 2 (922) is provided between the sliding blocks (920).

4. The nerve retractor device suitable for brain surgery according to claim 1, characterized in that: A limit plate (801) is arranged above the hook body (8), an electric lifter (803) is fixedly arranged at the bottom of one end of the limit plate (801), the output end of the electric lifter (803) is connected to the top of the hook body (8), and the other end of the limit plate (801) is fixedly connected to a connecting plate (802), and the top of the connecting plate (802) is fixedly connected to the sliding block (920).

5. The nerve retractor device suitable for brain surgery according to claim 4, characterized in that: A group of limit blocks (701) are fixedly arranged at both ends of the bottom of the shell (7), and the limit plates (801) are linearly slidably mounted on the corresponding limit blocks (701). A clearance groove (702) is penetrated at both ends of the bottom of the shell (7), and the connecting plate (802) is linearly slidably mounted in the corresponding clearance groove (702).

6. The nerve retractor device suitable for brain surgery according to claim 1, characterized in that: A crawling motor (601) is fixedly arranged on one side of the crawling frame (6); a crawling gear (604) is fixedly connected to the output end of the crawling motor (601); a crawling tooth groove (303) is arranged on the inner wall of the crawling frame (6); and the crawling gear (604) is meshed with the crawling tooth groove (303).

7. The nerve retractor device suitable for brain surgery according to claim 1, characterized in that: An angle adjustment motor (605) is fixedly arranged on the crawling frame (6), a driving gear is fixedly connected to the output end of the angle adjustment motor (605), a synchronous gear (607) is fixedly sleeved on the angle adjustment shaft (606), and a transmission toothed belt (608) is arranged between the driving gear and the synchronous gear (607).

8. The nerve retractor device suitable for brain surgery according to claim 1, characterized in that: A limit shaft (602) is rotatably installed in the climbing frame (6), and rollers (603) are fixedly connected to both ends of the limit shaft (602). A limit slot plate (302) is arranged on the outer wall of the climbing frame (6) along the circumferential direction. The limit shaft (602) is adapted to be slidably installed in the limit slot plate (302), and the roller (603) rolls against the outer wall of the climbing frame (6).

9. The nerve retractor device suitable for brain surgery according to claim 1, characterized in that: The surface of the headrest (2) is provided with a rubber pad.

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