A limb positioner for neurosurgical patients

Abstract

This invention discloses a limb locator for neurosurgical patients, including a bed frame and a reclining board mounted on the bed frame. The reclining board has several mounting openings corresponding to the patient's limb positions, and each mounting opening is equipped with a positioning component. The positioning component includes a fixed part and a movable part. The fixed part is fixedly connected to the reclining board, and the movable part is slidably mounted on the fixed part. The movable part includes a positioning post and upper and lower supports located at the upper and lower ends of the positioning post. The positioning post is slidably embedded in the fixed part and slides up and down along the fixed part. A stabilizing mechanism is provided in the fixed part. When the upper and lower supports move to the fixed part, they engage and fix with the stabilizing mechanism. This invention can flexibly adapt to different examination needs and limb positions, taking into account positioning stability, patient comfort, and ease of operation. It also has easy maintenance characteristics and effectively solves the pain points of poor adaptability of existing fixed constraint structures.

Description

Technical Field

[0001] This invention relates to the field of medical assistive technology, specifically a limb positioner for neurosurgical patients. Background Technology

[0002] In the clinical examination of neurosurgical patients, to ensure the accuracy of the examination results, it is necessary to effectively restrain and position the patient's limbs to prevent uncontrolled limb movement from interfering with the examination procedure. However, currently used limb restraint devices generally have a core deficiency: their overall structure is mostly a fixed design, and the restraint position and range cannot be flexibly adjusted according to actual examination needs or the specific restraint location of the patient's limb.

[0003] Specifically, the restraint components of existing restraint devices are mostly integrated fixed structures, which cannot be adapted to the different needs of different patients' limb segments (such as the forearm and upper arm of the upper limb, the lower leg and thigh of the lower limb, the abdomen and brain) or different examination items for the different restraint points. At the same time, the fixed structure is difficult to adapt to the differences in limb thickness of patients with different body types, resulting in restraint that is too loose and cannot play a stable positioning role, or restraint that is too tight and causes discomfort to patients. Summary of the Invention

[0004] The purpose of this invention is to provide a limb positioner for neurosurgical patients to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a limb locator for neurosurgical patients, comprising a bed frame and a reclining board mounted on the bed frame, wherein the reclining board has a plurality of mounting openings corresponding to the positions of the patient's limbs, and each mounting opening is equipped with a positioning component;

[0006] The positioning component includes a fixed part and a movable part. The fixed part is fixedly connected to the lying plate, and the movable part is slidably assembled on the fixed part. The movable part includes a positioning post and an upper support and a lower support disposed at the upper and lower ends of the positioning post. The positioning post is slidably embedded in the fixed part and slides up and down along the fixed part. A stabilizing mechanism is provided in the fixed part. When the upper support and the lower support move to the fixed part, they are engaged and fixed with the stabilizing mechanism.

[0007] A fixing ring is fitted onto the positioning post, and several hooks are distributed along the circumference of the fixing ring. A fixing strap is detachably connected between two positioning posts, and buckles corresponding to the hooks are provided at both ends of the fixing strap. In the initial state, the upper support of the positioning post is flush with the surface of the reclining board. According to the part and position of the limb to be restrained, the positioning post at the corresponding position is selected to extend upward. When the positioning post extends upward, it can form a horizontal limiting constraint on the patient's limb. With the help of the fixing strap, it can achieve a vertical limiting constraint on the limb.

[0008] Furthermore, the upper half of the positioning post is threaded, and an adjusting sleeve is threaded onto it. A pressure ring is rotatably connected to the bottom end of the adjusting sleeve. A fixed seat is provided at the top end of the lower support. Several elastic plates are circumferentially connected between the fixed seat and the pressure ring. The elastic plates are in the shape of an outwardly convex arc. When the pressure ring is screwed down with the adjusting sleeve, it causes the elastic plates to convex outwards further.

[0009] Furthermore, the outer side of the elastic sheet is covered with a rubber sleeve; both ends of the elastic sheet are detachably connected to the fixing seat and the pressure ring, respectively.

[0010] Furthermore, the bottom end of the upper support is circumferentially distributed with several guide rods, and an adjusting ring is slidably connected between each guide rod. The bottom end of the adjusting ring is connected to the adjusting sleeve through several connecting rods, so that it moves synchronously with the adjusting sleeve. The fixed ring is located below the adjusting ring, and the fixed ring is connected to the adjusting ring through a spring.

[0011] Furthermore, the fixing part includes a base, the base has a positioning port in the middle that is adapted to the upper support and the lower support, the inner wall of the positioning port has a number of stabilizing ports, the stabilizing mechanism includes a number of stabilizing blocks respectively disposed in each stabilizing port, a thrust spring is connected between the stabilizing block and the stabilizing port, and the outer peripheral surfaces of the upper support and the lower support are provided with corresponding latches.

[0012] Furthermore, the positioning post has a through hole in the middle, and the two ends of the through hole extend through to the upper support and the lower support respectively. The upper support has a push block at the top center, and a linkage rod at the bottom of the push block. The other end of the linkage rod extends through the through hole to the lower support. The portions of the linkage rod located on the upper support and the lower support are provided with cone blocks. Each slot has a push block that slides in it. The inner end of the push block has an inclined surface that matches the cone block. When the cone block is pressed down with the linkage rod, it can squeeze the push block to move in the horizontal direction.

[0013] Furthermore, the base is detachably fixed to the bottom of the lying board by several bolts, and the top of the lying board is covered with a soft pad, and the soft pad has an opening corresponding to the positioning port.

[0014] Furthermore, a buckle is fixedly connected to the left end of the fixing strap, and an adjusting frame is slidably fitted on the right end. Grooves are provided on both sides of the top surface of the right end of the fixing strap, and several locking teeth are provided in the grooves along their length, with the width of the locking teeth being half the width of the groove. Buttons are provided at both ends of the adjusting frame. A support rod is embedded inside the adjusting frame, and a sleeve is slidably fitted on the support rod. A locking block that matches the locking teeth is provided on the sleeve. A return spring is connected between the sleeve and the inner wall of the adjusting frame. The inner end of the button is connected to the sleeve. The buckle is provided on the adjusting frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This device has several installation ports on the reclining board corresponding to the patient's limbs. Each installation port is equipped with a positioning post that can be extended / reset independently. Medical staff can select the corresponding positioning post to extend and position according to the specific examination requirements and the limbs that need to be restrained by the patient, without being restricted by the fixed restraint structure. This completely solves the problem that the existing fixed structure cannot adapt to different limb segments and different examination positioning requirements.

[0017] Any two positioning posts can be detachably snapped together via a fixing strap. The adjustable length of the fixing strap allows for adaptation to the varying limb sizes of patients and adjusts the connection spacing according to constraint requirements. This avoids the problems of instability due to excessive looseness or discomfort due to excessive tightness caused by fixed constraint ranges in existing fixation structures. Simultaneously, the elastic sheet can be adjusted for a better fit via an adjustable sleeve, further eliminating gaps between the limb and the positioning components and improving positioning stability. Ultimately, this forms a three-dimensional limiting system with horizontal constraints from the positioning posts and vertical constraints from the fixing strap. This system prevents uncontrolled limb movement during examination while avoiding excessive constraint through flexible adaptation, balancing positioning stability and safety.

[0018] In its initial state, the positioning component of this device has the upper support flush with the lying board, which does not affect the patient's lying position or body positioning; the elastic plate is covered with a rubber sleeve, which, together with the spring, allows the fixing ring to move slightly, which can offset rigid pressure, avoid the fixing strap from tightening the limb, and significantly improve the patient's wearing comfort.

[0019] This device is simple and convenient to operate. The locking / unlocking of the positioning column is achieved through the linkage of the push block, and the length adjustment of the fixing belt can be operated by simply pressing the button. The positioning and resetting process before and after inspection is simple and efficient, reducing the difficulty of operation for medical staff. In addition, the base is detachably connected to the reclining plate by bolts, and the elastic plate is detachably connected to the fixing seat and pressure ring, which facilitates disassembly and maintenance in case of component failure and individual replacement of worn parts, ensuring long-term stable use of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a limb locator for neurosurgical patients according to the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the positioning component structure of the present invention;

[0023] Figure 4 This is a cross-sectional view of the positioning component of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the movable part of the present invention;

[0025] Figure 6 This is a schematic diagram of the fixing part structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the fixing belt structure of the present invention;

[0027] Figure 8 This is a cross-sectional view of the fixed belt of the present invention.

[0028] In the diagram, the components are: bed frame-1, reclining board-2, positioning assembly-3, positioning post-4, upper support-5, lower support-6, fixing ring-7, hook block-8, fixing strap-9, buckle block-10, adjusting sleeve-11, pressure ring-12, fixing seat-13, elastic sheet-14, rubber sleeve-15, guide rod-16, adjusting ring-17, spring component-18, base-19, positioning port-20, stabilizing block-21, thrust spring-22, bayonet-23, push block-24, linkage rod-25, cone block-26, adjusting frame-27, groove-28, locking tooth-29, button-30, support rod-31, sleeve-32, locking block-33, return spring-34, and push block-35. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, a limb locator for neurosurgical patients includes a bed frame 1 and a reclining board 2 mounted on the bed frame 1. The reclining board 2 has several mounting holes corresponding to the positions of the patient's limbs, and each mounting hole is equipped with a positioning component 3.

[0031] The positioning component 3 includes a fixed part and a movable part. The fixed part is fixedly connected to the lying plate 2, and the movable part is slidably assembled on the fixed part. The movable part includes a positioning post 4 and an upper support 5 and a lower support 6 provided at the upper and lower ends of the positioning post 4. The positioning post 4 is slidably embedded in the fixed part and slides up and down along the fixed part. A stabilizing mechanism is provided in the fixed part. When the upper support 5 and the lower support 6 move to the fixed part, they are engaged and fixed with the stabilizing mechanism.

[0032] A fixing ring 7 is fitted on the positioning post 4, and several hook blocks 8 are distributed along the circumference of the fixing ring 7; a fixing strap 9 is detachably connected between two positioning posts 4, and buckles 10 corresponding to the hook blocks 8 are provided at both ends of the fixing strap 9; in the initial state, the upper support 5 of the positioning post 4 is flush with the surface of the lying board 2, and the positioning post 4 at the corresponding position is selected to extend upward according to the part and position of the limb to be restrained by the patient; when the positioning post 4 extends upward, it can form a horizontal limiting constraint on the patient's limb, and with the fixing strap 9, it can achieve a vertical limiting constraint on the limb.

[0033] In this embodiment, the upper half of the positioning post 4 is threaded, and an adjusting sleeve 11 is threadedly connected to it. A pressure ring 12 is rotatably connected to the bottom end of the adjusting sleeve 11. A fixed seat 13 is provided at the top end of the lower support 6. Several elastic plates 14 are circumferentially connected between the fixed seat 13 and the pressure ring 12. The elastic plates are in the shape of an outwardly convex arc. When the pressure ring 12 is screwed down with the adjusting sleeve 11, it drives the elastic plates 14 to convex outward further. The outer side of the elastic plates 14 is covered with a rubber sleeve 15.

[0034] The threads on the outer circumference of the upper half of the positioning post 4 provide an adjustment base for the adjusting sleeve 11. When the adjusting sleeve 11 is screwed on, it moves up and down along the threads. The pressure ring 12, which is rotatably connected to the bottom of the adjusting sleeve 11, moves down synchronously with the adjusting sleeve 11, creating downward pressure on the elastic sheet 14 between the fixed seat 13 and the pressure ring 12. The elastic sheet 14 is initially slightly convex, and after being compressed, it convexes further outward, which can fit tightly against the side of the patient's limb, effectively eliminating the gap between the patient's limb and the positioning component 3, preventing the limb from swaying or shifting during restraint, and enhancing the horizontal restraint stability. The rubber sleeve 15 covering the outer side of the elastic sheet 14 can buffer the contact pressure between the elastic sheet 14 and the limb, preventing injury to the patient's skin.

[0035] In this embodiment, a plurality of guide rods 16 are circumferentially distributed at the bottom end of the upper support 5, and an adjusting ring 17 is slidably connected between each guide rod 16. The bottom end of the adjusting ring 17 is connected to the adjusting sleeve 11 through a plurality of connecting rods, so that it moves synchronously with the adjusting sleeve 11. The fixing ring 7 is located below the adjusting ring 17, and the fixing ring 7 is connected to the adjusting ring 17 through a spring member 18.

[0036] The guide rods 16 distributed circumferentially at the bottom of the upper support 5 provide sliding guidance for the adjusting ring 17. The adjusting ring 17 is rigidly connected to the adjusting sleeve 11 through a connecting rod and can move synchronously with the up and down movement of the adjusting sleeve 11. This ensures that the fixing ring 7 sleeved on the positioning post 4 is always at the top of the adjusting sleeve 11, ensuring that the connection position of the fixing strap 9 matches the constraint position of the elastic sheet 14. The spring 18 connecting the adjusting ring 17 and the lower fixing ring 7 allows the fixing ring 7 to make small displacement adjustments, effectively counteracting the rigid position restriction of the hook block 8, avoiding rigid pressure on the patient's limbs due to the fixed position of the hook block 8, preventing tightness and discomfort, and improving the patient's wearing comfort.

[0037] In this embodiment, the fixing part includes a base 19. The base 19 has a positioning port 20 in the middle that is adapted to the upper support 5 and the lower support 6. The inner wall of the positioning port 20 has a plurality of stabilizing ports. The stabilizing mechanism includes a plurality of stabilizing blocks 21 respectively disposed in each stabilizing port. A thrust spring 22 is connected between the stabilizing block 21 and the stabilizing port. The outer peripheral surfaces of the upper support 5 and the lower support 6 are provided with corresponding latches 23.

[0038] The positioning post 4 has a through hole in the middle, and the two ends of the through hole extend to the upper support 5 and the lower support 6 respectively. The upper support 5 has a push block 24 at the top center. The push block 24 has an annular groove on its outer side. The annular groove is designed to allow the user to easily lift the upper support 5 away from the lying board 2 by pinching the inner wall of the annular groove. The bottom of the push block 24 has a linkage rod 25. The other end of the linkage rod 25 extends to the lower support 6 through the through hole. The parts of the linkage rod 25 located on the upper support 5 and the lower support 6 are provided with cone blocks 26. Each latch 23 has a push block 35 that slides in it. The inner end of the push block 35 has an inclined surface that matches the cone block 26. When the cone block 26 is pressed down with the linkage rod 25, it can squeeze the push block 35 to move in the horizontal direction.

[0039] The base 19 of the positioning component 3 is bolted to the bottom of the reclining board 2. The positioning port 20 in the middle of the base 19 provides a sliding path for the movable part. The positioning post 4 of the movable part is embedded in the positioning port 20. In the initial state, the top surface of the upper support 5 is flush with the surface of the reclining board 2, which does not affect the patient's lying position. At this time, the stabilizing block 21 in the base 19 is pushed into the slot 23 of the upper support 5 by the thrust spring 22, thereby fixing the positioning post 4 and preventing the positioning post 4 from shaking when it is not extended, which would affect the patient's lying comfort.

[0040] When it is necessary to restrain the patient's limbs, the corresponding positioning post 4 should be pulled upwards. First, press the push block 24 at the top of the upper support 5 to drive the linkage rod 25 to move downwards along the axial through hole in the middle of the positioning post 4. The two cone blocks 26 on the linkage rod 25 will press down accordingly, and the cone surface will squeeze the push block 35 in the bayonet 23, causing the push block 35 to move horizontally towards the stabilizing port. The push block 35 pushes the stabilizing block 21 to compress the thrust spring 22, and the stabilizing block 21 will completely exit the bayonet 23, releasing the lock on the upper support 5. Then, the positioning post 4 can be lifted upwards by pinching the upper support 5. When it moves to a certain height, the thrust spring 22 in the stabilizing port on the inner wall of the positioning port 20 of the base 19 will push the stabilizing block 21 to move towards the center of the positioning port 20 and embed it into the corresponding bayonet 23 on the outer circumference of the lower support 6, thereby achieving height locking of the positioning post 4 and providing stable support for limb restraint.

[0041] Similarly, when the inspection is finished and the fixed column needs to be reset, simply press the push block 24 to disengage the stabilizing block 21 from the lower support 6, and the positioning column 4 can be pressed down and slid down along the positioning port 20 to reset.

[0042] In this embodiment, the base 19 is detachably fixed to the bottom of the lying plate 2 by several bolts. The top of the lying plate 2 is covered with a soft pad, and the soft pad has an opening corresponding to the positioning port 20. The two ends of the elastic sheet 14 are detachably connected to the fixed seat 13 and the pressure ring 12, respectively. If the positioning component 3 malfunctions, the bolts connecting the base 19 and the lying plate 2 can be unscrewed, and the positioning component 3 can be disassembled for maintenance. If the elastic sheet 14 is deformed or the rubber sleeve 15 is worn, the elastic sheet 14 can be disassembled and replaced separately to ensure the long-term performance of the equipment.

[0043] In this embodiment, a buckle 10 is fixedly connected to the left end of the fixing strap 9, and an adjusting frame 27 is slidably sleeved on the right end. Grooves 28 are provided on both sides of the top surface of the right end of the fixing strap 9. Several locking teeth 29 are provided in the grooves 28 along their length direction. The width of the locking teeth 29 is half the width of the groove 28. Buttons 30 are provided at both ends of the adjusting frame 27. A support rod 31 is embedded inside the adjusting frame 27. A sleeve 32 is slidably sleeved on the support rod 31. A locking block 33 that matches the locking teeth 29 is provided on the sleeve 32. A return spring 34 is connected between the sleeve 32 and the inner wall of the adjusting frame 27. The inner end of the button 30 is connected to the sleeve 32. Buckles 10 are provided on the adjusting frame 27.

[0044] The fixing ring 7 on the positioning post 4 is circumferentially distributed with hook blocks 8. Any two positioning posts 4 can be fastened to the hook blocks 8 by the buckles 10 at both ends of the fixing strap 9, so as to achieve vertical constraint on the patient's limbs and form a three-dimensional limiting system with the horizontal constraint of the positioning post 4.

[0045] The adjustment bracket 27 at the right end of the fixing strap 9 is used to adjust the effective length of the fixing strap 9. By pressing the buttons 30 at both ends of the adjustment bracket 27, the internal sleeve 32 can be moved along the support rod 31. The locking block 33 on the sleeve 32 disengages from the locking tooth 29 in the groove 28 of the fixing strap 9. At this time, the position of the adjustment bracket 27 can be changed so that it moves along the length of the fixing strap 9. After releasing the button 30, the return spring 34 pushes the sleeve 32 to return to its original position, and the locking block 33 re-engages into the locking tooth 29, thereby locking the length of the fixing strap 9. At this time, the spacing of the buckles 10 on both sides changes, thereby achieving fine adjustment of the effective length of the fixing strap 9 to adapt to the restraint needs of limbs of different thicknesses.

[0046] The specific operation and workflow of this embodiment are as follows:

[0047] 1. Patient positioning and selection of positioning column 4

[0048] The patient lies on the soft pad of the reclining board 2. At this time, the upper support 5 of the positioning component 3 is flush with the surface of the reclining board 2, which does not affect the patient's position. Medical staff select the corresponding position to install the positioning component 3 in the mouth according to the examination needs or the restraint of the patient's limbs, and pull the positioning column 4 upward to the target height.

[0049] 2. Elastic sheet 14: fit adjustment and flexible adaptation

[0050] After all the corresponding positioning posts 4 are extended, the medical staff check which part of the positioning post 4 has a large gap with the patient. By turning the adjusting sleeve 11 on the positioning post 4, the adjusting sleeve 11 moves down along the thread and drives the pressure ring 12 to press down synchronously. After the elastic sheet 14 is pressed, it bulges outward further until the rubber sleeve 15 fits tightly against the side of the patient's limb, eliminating the gap between the limb and the positioning component 3 and preventing the limb from shaking.

[0051] 3. Fixed belt 9: Vertical constraint and length adjustment

[0052] Next, select a fixing strap 9 of suitable length and engage the buckles 10 at both ends with the hooks 8 on the corresponding positioning post 4 fixing ring 7 to achieve vertical restraint of the limb; if the length of the fixing strap 9 is not suitable, press the buttons 30 at both ends of the adjustment frame 27, adjust the length of the fixing strap 9 to a suitable state, and then release the buttons 30. The engaging block 33 engages with the locking teeth 29 to complete the locking, forming a horizontal + vertical flexible three-dimensional restraint system.

[0053] 4. Unlock and reset after inspection.

[0054] After the examination, first remove the fixing strap 9; then press the push block 24 at the top of the positioning column 4 to drive the linkage rod 25 and the cone block 26 to press down the push block 35, push out the stabilizing block 21 to release the lock, and the positioning column 4 slides down along the positioning port 20 to reset, so that the upper support 5 is flush with the surface of the lying board 2, making it easier for the patient to get up.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A limb locator for neurosurgical patients, characterized in that: The bed includes a bed frame and a reclining board mounted on the bed frame. The reclining board has several mounting holes corresponding to the positions of the patient's limbs, and each mounting hole is equipped with a positioning component. The positioning component includes a fixed part and a movable part. The fixed part is fixedly connected to the lying plate, and the movable part is slidably assembled on the fixed part. The movable part includes a positioning post and an upper support and a lower support disposed at the upper and lower ends of the positioning post. The positioning post is slidably embedded in the fixed part and slides up and down along the fixed part. A stabilizing mechanism is provided in the fixed part. When the upper support and the lower support move to the fixed part, they are engaged and fixed with the stabilizing mechanism. The positioning post is fitted with a fixing ring, and the fixing ring has several hooks distributed along its circumference; a fixing strap is detachably connected between two positioning posts, and the fixing strap has buckles at both ends corresponding to the hooks; in the initial state, the upper support of the positioning post is flush with the surface of the lying board, and the positioning post at the corresponding position is selected to extend upward according to the part and position of the limb to be restrained by the patient. When the positioning post extends upward, it can form a horizontal limiting constraint on the patient's limb. When used in conjunction with the fixing strap, it can achieve a vertical limiting constraint on the limb. The upper half of the positioning column is threaded, and an adjusting sleeve is threaded onto it. A pressure ring is rotatably connected to the bottom end of the adjusting sleeve. A fixed seat is provided at the top end of the lower support. Several elastic plates are circumferentially connected between the fixed seat and the pressure ring. The elastic plates are in the shape of an outwardly convex arc. When the pressure ring is screwed down with the adjusting sleeve, it causes the elastic plates to convex outward further.

2. The limb locator for neurosurgical patients according to claim 1, characterized in that: The elastic sheet is covered with a rubber sleeve on its outer side; the two ends of the elastic sheet are detachably connected to the fixing seat and the pressure ring, respectively.

3. A limb locator for neurosurgical patients according to claim 1, characterized in that: The bottom end of the upper support has several guide rods circumferentially distributed, and each guide rod is slidably connected to an adjusting ring. The bottom end of the adjusting ring is connected to the adjusting sleeve through several connecting rods, so that it moves synchronously with the adjusting sleeve. The fixed ring is located below the adjusting ring, and the fixed ring is connected to the adjusting ring through a spring.

4. A limb locator for neurosurgical patients according to claim 1, characterized in that: The fixing part includes a base, and a positioning port adapted to the upper support and the lower support is opened in the middle of the base. Several stabilizing ports are opened in the inner wall of the positioning port. The stabilizing mechanism includes several stabilizing blocks respectively set in each stabilizing port. A thrust spring is connected between the stabilizing block and the stabilizing port. Corresponding locking slots are opened on the outer peripheral surfaces of the upper support and the lower support.

5. A limb locator for neurosurgical patients according to claim 4, characterized in that: The positioning post has a through hole in the middle, and the two ends of the through hole extend to the upper support and the lower support respectively. The upper support has a push block at the top center, and a linkage rod at the bottom of the push block. The other end of the linkage rod extends to the lower support through the through hole. The portions of the linkage rod located on the upper support and the lower support are provided with cone blocks. Each slot has a push block that slides in it. The inner end of the push block has an inclined surface that matches the cone block. When the cone block is pressed down with the linkage rod, it can squeeze the push block to move in the horizontal direction.

6. A limb locator for neurosurgical patients according to claim 4, characterized in that: The base is detachably fixed to the bottom of the lying board by several bolts. The top of the lying board is covered with a soft pad, and the soft pad has an opening corresponding to the positioning port.

7. A limb locator for neurosurgical patients according to claim 1, characterized in that: The left end of the fixing strap is fixedly connected to a buckle block, and the right end is slidably fitted with an adjusting frame. Grooves are formed on both sides of the top surface of the right end of the fixing strap, and several locking teeth are arranged along the length of each groove, with the width of each locking tooth being half the width of the groove. Buttons are provided at both ends of the adjusting frame. A support rod is embedded inside the adjusting frame, and a sleeve is slidably fitted on the support rod. A locking block adapted to the locking teeth is provided on the sleeve. A return spring connects the sleeve to the inner wall of the adjusting frame. The inner end of the button is connected to the sleeve. The buckle block is provided on the adjusting frame.

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