Distraction device suitable for shoulder arthroscopy

Abstract

The utility model discloses a distractor suitable for shoulder arthroscopy, which comprises an operating bed, a moving component, a lifting component, a limiting component and a fixing component, the moving component is transversely arranged above the operating bed and connected with the operating bed, the lifting component is arranged above the moving component, the limiting component is arranged above the lifting component, and the fixing component is arranged above the limiting component. The limiting assembly is located between the lifting assembly and the moving assembly and arranged at one end of the moving assembly, the moving assembly is connected with the lifting assembly through the limiting assembly, and the fixing assembly is located above the lifting assembly and rotationally connected to the lifting assembly. When the arm lifting device is used, the moving assembly can be moved to the armpit position of a patient, then the fixing assembly and the lifting assembly can lift the arm of the patient upwards from the position below the arm of the patient, and therefore a doctor is prevented from being shielded.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a retractor suitable for use in shoulder arthroscopy. Background Technology

[0002] Shoulder traction frame, also known as shoulder traction frame or shoulder traction frame, is an auxiliary device designed specifically for shoulder arthroscopic lateral decubitus surgery. It assists in completing shoulder joint surgery by tractioning the arm.

[0003] The shoulder joint upper limb traction frame can meet the tilt angle required for shoulder joint lateral decubitus surgery, ensuring that doctors can flexibly adjust it during the operation to adapt to different surgical needs.

[0004] However, this type of traction frame requires a gantry frame to be set up on the operating table to provide traction. On the one hand, setting up the traction frame itself is time-consuming and laborious. On the other hand, its angle is generally limited to the adjustment of the pitch angle. Moreover, the surgeon's operation is greatly hindered by the obstruction of the gantry frame and the hanger itself. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the prior art, such as the time-consuming and labor-intensive construction of the traction frame, the fact that its angle is generally limited to the adjustment of the pitch angle, and the fact that the operator's operation is greatly obstructed by the gantry frame and the hanging frame itself.

[0006] A retractor suitable for shoulder arthroscopy is proposed, comprising an operating table, a moving component, an elevating component, a limiting component, and a fixing component. The moving component is laterally positioned above and connected to the operating table. The elevating component is positioned above the moving component. The limiting component is located in the middle of the elevating component and the moving component, and is positioned at one end of the moving component. The moving component is connected to the elevating component through the limiting component. The fixing component is positioned above the elevating component and is rotatably connected to the elevating component.

[0007] In this utility model's technical solution, when the moving component is connected to the operating table, simply insert the operating table's board into the inside of the mounting bracket through the opening, and then rotate the fixing bolt clockwise until the end of the fixing bolt abuts against the operating table. This completes the fixing of the moving component. After the hook of the limiting component is opened, the lifting component can be placed in the groove at the top of the fixing block. Then, the hook is closed, and once it engages in the slot, the connection between the moving component, the fixing component, and the lifting component is complete. After the linear slide of the moving component is started, the slider of the linear slide can drive the limiting component to reciprocate along the length direction of the linear slide. During the movement of the limiting component... This allows the fixation and elevation components to move synchronously. The patient's arm is placed on the fixation component, so the movement of the fixation component can move the patient laterally to adjust the position of the arm. After the moving component moves to the patient's armpit, the patient's arm can be placed on the fixation component, and then the fixation component can lift the patient's arm from below, thus avoiding obstruction of the surgeon. This addresses the shortcomings mentioned in the technical background, such as the time-consuming and laborious process of setting up a traction frame, the fact that its angle is generally limited to pitch adjustment, and the surgeon's operation being significantly hindered by the gantry frame and the hanging frame itself.

[0008] In a preferred embodiment of the present invention, the movable component includes a support rod, a mounting base, a fixing bolt, a lifting rod, and a linear slide. The linear slide is horizontally positioned above the operating table. There are two sets of lifting rods, each located at one end of the linear slide. The top ends of both sets of lifting rods are connected to the linear slide, and the lower ends of both sets of lifting rods are connected to a support rod. Each set of support rods has a mounting base and a fixing bolt at its lower end. The fixing bolt is vertically connected to the lower part of the mounting base. The fixing block of the limiting component is connected to the linear slide. When needed, the movable component can drive the lifting component and the fixing component to move laterally, thereby adjusting the position of the lifting component and the fixing component laterally according to the patient's position.

[0009] In a preferred embodiment of the present invention, the limiting component includes a fixed block, a movable block, a first motor, a first screw, a hook, and a hinge rod. The first motor is located at one end of the fixed block and connected to the side wall of the fixed block. The first screw is horizontally disposed inside the fixed block and connected to the first motor. There are two sets of hooks, located at both ends of the fixed block. A movable block is connected below each set of hooks, and a hinge rod is connected to the middle position of both sets of hooks. The two sets of movable blocks are slidably disposed inside the fixed block, and the first screw is connected to the movable blocks. The lifting component is slidably connected inside the fixed block. When the hooks are open, the fixed component can slide inside the fixed block. When the hooks are closed, the position of the fixed component is restricted, thereby preventing the fixed component from continuing to slide.

[0010] In a preferred embodiment of the present invention, the lifting assembly includes a fixed plate, a lifting plate, scissor arms, a sliding block, a second screw, and a handle. The fixed plate is slidably connected to the fixed block, the lifting plate is located above the fixed plate, there are two sets of scissor arms, both positioned between the lifting plate and the fixed plate, the sliding block is slidably mounted on the fixed plate, and both ends of the sliding block are connected to the two sets of scissor arms respectively, the second screw is rotatably connected to the fixed plate and is connected to the sliding block, the handle is located on the outside of the fixed plate and is connected to the second screw, and the fixed assembly is connected to the lifting plate. After the lifting assembly is opened, the height of the fixed assembly can be adjusted up and down to ensure the height of the patient's arm and to correctly support the patient's arm.

[0011] In a preferred embodiment of the present invention, the fixing plate is provided with a plurality of slots corresponding to the hook claws. After the hook claws are engaged in the slots, they can restrict the fixing plate. After the hook claws are rotated out of the slots, the fixing plate can slide.

[0012] In a preferred embodiment of the present invention, the fixing assembly includes a first support plate, a second support plate, an electric push rod, a connecting plate, a damping rotator, and a traction device. The damping rotator is located below the connecting plate and at one end of the connecting plate. The connecting plate is connected to the lifting plate via the rotator. The first support plate is located above the connecting plate and is hinged to the connecting plate. The electric push rod is located at one end of the first support plate and below it, with both ends connected to the connecting plate and the first support plate, respectively. The traction device is located below the first support plate and at the other end of the first support plate, and is connected to the second support plate. The second support plate is located at one end of the first support plate and is slidably connected to the first support plate. When the second support plate is withdrawn, it extends the total length of the first and second support plates, thereby ensuring that the first and second support plates can completely support the patient's arm.

[0013] In a preferred embodiment of the present invention, the second support plate is provided with straps. After the patient places his arm on the first support plate and the second support plate, the straps can be used to restrain the patient's arm on the first support plate and the second support plate, thereby preventing the patient's arm from falling off when the first support plate and the second support plate rotate upward.

[0014] In a preferred embodiment of the present invention, the traction device includes a housing, a second motor, a cam, a moving rod, and a spring. The housing is connected to a first support plate. The cam is rotatably disposed inside the housing. The second motor is connected to the bottom plate of the housing and is also connected to the cam. The moving rod is located on one side of the cam, with one end of the moving rod abutting against the cam and the other end connected to the second support plate. The spring is sleeved on the moving rod, and both ends of the spring are connected to the housing and the moving rod, respectively. When the cam rotates in the forward direction, the moving rod can push the second support plate outward. When the cam rotates in the reverse direction, the spring can retract the second support plate through the moving rod, thus eliminating the need for manual adjustment.

[0015] The advantages of this utility model compared with the prior art are:

[0016] In use, this invention moves the movable component to the patient's armpit, and then the fixing and lifting components lift the patient's arm from below, thus avoiding obstruction of the doctor's view. After the patient places their arm on the fixing component, when it is necessary to adjust the position of the patient's arm laterally, the movable component is used to fix the position of the fixing component laterally. When the fixing component moves, it can move the patient's arm. When the movable component is fixed on the operating table, the operating table board is inserted into the inside of the card slot through the opening, and then the fixing bolt is rotated clockwise until the bolt abuts against the board, thus completing the fixation of the movable component. Attached Figure Description

[0017] Figure 1 A schematic diagram of a retractor structure suitable for shoulder arthroscopy;

[0018] Figure 2 This is a magnified view of point B in Figure 1;

[0019] Figure 3 This is a schematic diagram of a fixation component for a retractor suitable for shoulder arthroscopy.

[0020] Figure 4 This is a schematic diagram of a traction device for a spreader used in shoulder arthroscopy.

[0021] Figure 5 A schematic diagram of the lifting component of a retractor suitable for shoulder arthroscopy;

[0022] Figure 6 A schematic diagram of the internal structure of a lifting component of a retractor suitable for shoulder arthroscopy.

[0023] Figure 7 A schematic diagram of a limiting component structure for a retractor suitable for shoulder arthroscopy;

[0024] Figure 8 This is a schematic diagram showing the connection between the hook and the fixation block of a retractor suitable for shoulder arthroscopy (the fixation block is a single unit; one part is removed to show the internal structure).

[0025] Figure 9 This is a schematic diagram of the internal structure of a fixation block in a retractor used in shoulder arthroscopy (the fixation block is a single unit; one section has been removed to show the internal structure).

[0026] Figure 10 An exploded schematic diagram of the hook and moving block of a retractor suitable for shoulder arthroscopy.

[0027] Figure 11 A top view schematic diagram of a limiting component of a retractor suitable for shoulder arthroscopy;

[0028] Figure 12 for Figure 11 AA sectional view;

[0029] Figure 13 A schematic diagram showing the opening of the claws of a retractor suitable for shoulder arthroscopy.

[0030] Figure 14 A schematic diagram of the movable component of a retractor suitable for shoulder arthroscopy.

[0031] Figure 15 A schematic diagram of the lifting rod structure of a movable component of a retractor suitable for shoulder arthroscopy;

[0032] In the diagram: 1-Operating table, 2-Moving assembly, 21-Support rod, 22-Card holder, 23-Fixing bolt, 24-Lifting rod, 24-Linear slide, 3-Lifting assembly, 31-Fixing plate, 32-Lifting plate, 33-Scissor arm, 34-Sliding block, 35-Second screw, 36-Handle, 4-Limiting assembly, 41-Fixing block, 42-Moving block, 43-First motor, 44-First screw, 45-Hook, 46-Hinge rod, 5-Fixing assembly, 51-First support plate, 52-Second support plate, 53-Electric push rod, 54-Connecting plate, 55-Damping rotator, 6-Card slot, 7-Traction device, 71-Box, 72-Second motor, 73-Cam, 74-Moving rod, 75-Spring, 8-Strap. Detailed Implementation

[0033] The following will refer to the appendix in the embodiments of this utility model. Figure 1-15 The technical solutions in the embodiments of this utility model will be described in detail below.

[0034] like Figure 1-2As shown, a retractor suitable for shoulder arthroscopy includes an operating table 1, a moving component 2, an elevating component 3, a limiting component 4, and a fixing component 5. The moving component 2 is laterally positioned above the operating table 1. After the patient is lying on the operating table 1 in a lateral decubitus position, the moving component 2 will be positioned above the patient's body.

[0035] like Figure 1-2 As shown, the moving component 2 is snapped onto the operating table 1, so the moving component 2 can move according to the length direction of the operating table 1 during use. The lifting component 3 is located above the moving component 2, and the lifting component 3 is connected to the moving component 2 through the limiting component 4.

[0036] like Figure 1-2 As shown, when the moving component 2 moves laterally to the limiting component 4, the limiting component 4 can drive the moving component 2 to move synchronously. The fixed component 5 is located above the lifting component 3 and connected to the lifting component 3.

[0037] like Figure 1-2 As shown, after the patient lies on the operating table 1 in a side-lying position, the patient can place their arm on the fixation component 5. The lifting component 3 can adjust the height of the fixation component 5 up and down when needed. After the patient places their arm on the fixation component 5, the fixation component 5 can open the patient's arm upward.

[0038] like Figure 1-2 As shown, the fixed component 5 is connected to the lifting component 3, so when the limiting component 4 drives the moving component 2 to move, the lifting component 3 can drive the fixed component 5 to move synchronously.

[0039] like Figure 3-4 As shown, the fixing assembly 5 includes a first support plate 51, a second support plate 52, an electric push rod 53, a connecting plate 54, a damping rotator 55, and a traction device 7. The damping rotator 55 is disposed below the connecting plate 54 and located at one end of the connecting plate 54. The rotating end of the damping rotator 55 is connected to the connecting plate 54 by screws.

[0040] like Figure 3-4 As shown, the fixed end of the damping rotator 55 is connected to the lifting plate 32 of the lifting assembly 3 by screws. Therefore, when the lifting assembly 3 remains stationary, the connecting plate 54 can rotate around the damping rotator 55.

[0041] like Figure 3-4As shown, the first support plate 51 is positioned above the connecting plate 54, and one end of the first support plate 51 is hinged to the connecting plate 54. The first support plate 51 can rotate up and down with the hinge point as the center. The electric push rod 53 is located in the middle of the first support plate 51 and is positioned below the first support plate 51. The output end and the fixed end of the electric push rod 53 are respectively hinged to the connecting plate 54 and the first support plate 51.

[0042] like Figure 3-4 As shown, when the output end of the electric push rod 53 extends or retracts, it can drive the first support plate 51 to rotate counterclockwise or clockwise around the junction point of the first support plate 51 and the connecting plate 54, thereby adjusting the angle between the first support plate 51 and the connecting plate 54.

[0043] like Figure 3-4 As shown, the second tray 52 is disposed parallel to the first tray 51 at one end of the first tray 51, and the second tray 52 is slidably connected to the first tray 51. When needed, the second tray 52 can be pulled outward to change the total length of the first tray 51 and the second tray 52.

[0044] like Figure 3-4 As shown, a strap 8 is provided horizontally on the second support plate 52. One end of the strap 8 is attached to the second support plate 52, and the other end of the strap 8 is attached to the second support plate 52 by a preset Velcro. Therefore, after the patient places his arm on the first support plate 51 and the second support plate 52,

[0045] like Figure 3-4 As shown, the end of the strap 8 with Velcro can be wrapped around the patient's arm from above and attached to the second support plate 52, thereby restricting the position of the patient's arm on the first support plate 51 and the second support plate 52, thus preventing the first support plate 51 and the second support plate 52 from falling off after being raised.

[0046] like Figure 3-4 As shown, the traction device 7 includes a housing 71, a second motor 72, a cam 73, a moving rod 74, and a spring 75. The housing 71 is located at one end of the electric push rod 53 and is connected to the first support plate 51 by screws. The cam 73 is disposed inside the housing 71 and rotatably connected to the bottom plate of the housing 71.

[0047] like Figure 3-4 As shown, the second motor 72 is located below the housing 71 and is fixedly connected to the housing 71 by screws. The output end of the second motor 72 is connected to the cam 73, so the cam 73 can be rotated when the second motor 72 is working.

[0048] like Figure 3-4As shown, the movable rod 74 is located on one side of the cam 73 and is slidably connected inside the housing 71. One end of the movable rod 74 abuts against the cam 73, and the other end of the movable rod 74 passes through the side plate of the housing 71 and is connected to the second support plate 52. Therefore, when the cam 73 rotates in the forward direction, it can push the movable rod 74 outward, and when the movable rod 74 moves outward, it can push the second support plate 52 outward.

[0049] like Figure 3-4 As shown, the spring 75 is installed inside the housing 71 and sleeved on the moving rod 74. The two ends of the spring 75 are connected to the moving rod 74 and the side plate of the housing 71. Therefore, when the moving rod 74 moves outward, it will compress the spring 75. At this time, the spring 75 will undergo elastic deformation and store force.

[0050] like Figure 3-4 As shown, when the cam 73 rotates in the opposite direction, the spring 75 can spring the moving rod 74 back into the housing 71. When the moving rod 74 moves into the housing 71, it can pull the second support plate 52 inward, thereby reducing the relative distance between the second support plate 52 and the first support plate 51.

[0051] like Figure 3-4 As shown, when the patient's arm is restrained on the second support plate 52 by the strap 8, the cam 73 rotates in the forward direction and pushes the second support plate 52 outward by the moving rod 74. The second support plate 52 can pull the patient's arm when it moves outward.

[0052] like Figure 5-6 As shown, the lifting component 3 includes a fixed plate 31, a lifting plate 32, a scissor arm 33, a sliding block 34, a second screw 35, and a handle 36. The fixed plate 31 is located above the fixed block 41 of the limiting component 4, and the fixed plate 31 is slidably connected to the fixed block 41.

[0053] like Figure 5-6 As shown, the lifting plate 32 is located above the fixed plate 31, and there are two sets of scissor arms 33, both of which are vertically arranged in the middle of the fixed plate 31 and the lifting plate 32, and the two sets of scissor arms 33 are respectively arranged on both sides of the fixed plate 31 and the lifting plate 32.

[0054] like Figure 5-6 As shown, the upper and lower hinged ends of one end of the two sets of scissor arms 33 are respectively hinged to the fixed plate 31 and the lifting plate 32. The upper sliding end of the other end of the two sets of scissor arms 33 is slidably connected to the lifting plate 32. The lower sliding end of the two sets of scissor arms 33 is slidably set on the fixed plate 31 and connected to the sliding block 34.

[0055] like Figure 5-6As shown, the sliding block 34 is slidably connected to the fixed plate 31, and both ends of the sliding block 34 are respectively hinged to the lower sliding end of the scissor arm 33. Therefore, the scissor arm 33 can be opened or closed when the sliding block 34 slides.

[0056] like Figure 5-6 As shown, the second screw 35 is located at the center of the sliding block 34 and is rotatably connected to the fixed plate 31. The sliding block 34 is threadedly connected to the second screw 35. The handle 36 is located on the outside of the fixed plate 31 and is connected to the second screw 35 by welding.

[0057] like Figure 5-6 As shown, when the handle 36 is turned in the forward or reverse direction, it can drive the second screw 35 to rotate synchronously, and when the second screw 35 rotates in the forward or reverse direction, it can drive the sliding block 34 to slide back and forth.

[0058] like Figure 5-6 As shown, the fixing plate 31 has multiple slots 6 corresponding to the hook 45. After the hook 45 is inserted into the slot 6, the fixing plate 31 can no longer slide on the fixing block 41. When the hook 45 is rotated out from the slot 6, the fixing plate 31 can slide on the fixing block 41.

[0059] like Figure 7-13 As shown, the limiting component 4 includes a fixed block 41, a moving block 42, a first motor 43, a first screw 44, and a claw 45. The fixed block 41 is located above the linear slide 25 and is rotatably connected to the slider of the linear slide 25.

[0060] like Figure 7-13 As shown, the first motor 43 is located on one side of the fixed block 41 and is connected to the fixed block 41 by screws. The first screw 44 is arranged laterally inside the fixed block 41 and is located at one end of the fixed block 41 and rotatably connected inside the fixed block 41. The output end of the first motor 43 is connected to the first screw 44.

[0061] like Figure 7-13 As shown, when the first motor 43 is working, it can drive the first screw 44 to rotate. There are two sets of hooks 45, which are respectively set at both ends of the fixed block 41. There are two hooks 45 in one set. Each set of hooks has a hinge rod 46 in the middle position. The hinge rod 46 is welded to the hook 45, and both sets of hooks 45 are hinged to the fixed block 41 through the hinge rod 46 in the middle position.

[0062] like Figure 7-13As shown, each set of hooks 45 has a set of moving blocks 42 at its lower end, and each hook 45 has a groove at its lower end. The top of the moving block 42 is slidably connected to the groove at the lower end of the hook 45, and the moving blocks 42 are slidably disposed inside the fixed block 41.

[0063] like Figure 7-13 As shown, when the two moving blocks 42 below the same set of hooks 45 move outward or inward in sync, they can open or close their corresponding set of hooks 45. The two moving blocks 42 located on the same side of the fixed block 41 are connected by a fixed rod.

[0064] like Figure 7-13 As shown, when one set of moving blocks 42 moves, it will drive another set of moving blocks 42 to move synchronously. The set of moving blocks 42 located at one end of the first screw 44 are all threadedly connected to the first screw 44, and the threads of the two moving blocks 42 are opposite. Therefore, when the first screw 44 rotates, it can drive the two moving blocks 42 to move inward or outward synchronously, thereby opening or closing the hook 45.

[0065] like Figure 14-15 As shown, the moving component 2 includes a support rod 21, a card holder 22, a fixing bolt 23, a lifting rod 24, and a linear slide 25. The linear slide 25 is horizontally positioned above the operating table 1 (the linear slide 25 used is an existing product, so it will not be described in detail).

[0066] like Figure 14-15 As shown, a set of lifting rods 24 are provided at both ends of the linear slide table 25. The top end of the lifting rods 24 is connected to the lower surface of the linear slide table 25. The lower end of each set of lifting rods 24 is slidably disposed inside the support rod 21, and the lower end of each set of support rods 21 is connected to a card seat 22.

[0067] like Figure 14-15 As shown, each of the two sets of support rods 21 has two screws at its top. The screws are horizontally positioned on one side of the support rod 21 and threaded onto the support rod 21. The lifting rod 24 has multiple grooves corresponding to the screws.

[0068] like Figure 14-15 As shown, after moving the lifting rod 24 up or down to the desired position, the screw can be turned in the forward direction. Once the end of the screw is inserted into the preset groove on the lifting rod 24, the position of the lifting rod 24 can be restricted, thereby preventing the lifting rod 24 from continuing to move up and down.

[0069] like Figure 14-15 As shown, the lifting rod 24 can drive the linear slide 25 to move synchronously when it moves up and down, thereby adjusting the height of the linear slide 25. Each card holder 22 has a vertically threaded fixing bolt 23 connected to its bottom.

[0070] like Figure 14-15 As shown, after inserting the bed board of the operating table 1 into the interior of the card holder 22 through the opening of the card holder 22, the fixing bolt 23 can be turned forward until the fixing bolt 23 abuts against the bed board and then the rotation can be stopped, thereby restricting the position of the card holder 22 on the operating table 1.

[0071] The movement process in this embodiment is as follows: After the patient lies on the operating table 1 in a lateral decubitus position, the linear slide 25 can be connected to the operating table 1 through the bracket 22 and the support rod 21. Then, the lifting rod 24 can be moved up or down to adjust the distance between the linear slide 25 and the operating table 1.

[0072] After the linear slide 25 is moved to the patient's armpit, the patient can place their arm on the first support plate 51 and the second support plate 52, and use the strap 8 to restrain the patient's arm on the first support plate 51 and the second support plate 52. Then, the handle 36 can be rotated as needed to adjust the height of the fixing component 5 up and down using the scissor arm 33.

[0073] When the patient's arm needs to be rotated upward, the electric push rod 53 is activated. When the electric push rod 53 extends outward, it can drive the first support plate 51 and the second support plate 52 to rotate upward. Then, when the patient's arm needs to be pulled forward, the second motor 72 is activated. When the second motor 72 rotates, it can use the moving rod 74 to push the second support plate 52 outward. When the second support plate 52 moves outward, it can pull the patient's arm.

[0074] When it is necessary to adjust the position of the fixing component 5 and the lifting component 3 according to the width direction of the operating table 1, the linear slide 25 can be activated to drive the slider to slide. When the slider of the linear slide 25 slides...

[0075] This allows the fixing component 5 and the lifting component 3 to slide together along the length of the linear slide 25, thereby adjusting the position of the fixing component 5 and the lifting component 3. When it is necessary to adjust the position of the fixing component 5 and the lifting component 3 along the length of the operating table 1, the first motor 43 can be started to drive the first screw 44 to rotate in the forward direction.

[0076] This opens the hook 45. Then, with the linear slide 25 stationary, the positions of the fixing component 5 and the lifting component 3 can be adjusted along the length of the operating table 1. After the adjustment is completed, the first motor 43 can be started to drive the first screw 44 to rotate in the opposite direction to close the hook 45, so that the hook 45 can be locked into the preset slot 6 of the fixing plate 31, thereby restricting the position of the fixing component 5 and the lifting component 3.

[0077] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A retractor suitable for use in shoulder arthroscopy, comprising an operating table (1), characterized in that: It also includes a moving component (2), a lifting component (3), a limiting component (4), and a fixing component (5). The moving component (2) is horizontally positioned above the operating table (1) and connected to the operating table (1). The lifting component (3) is positioned above the moving component (2). The limiting component (4) is located in the middle of the lifting component (3) and the moving component (2), and is positioned at one end of the moving component (2). The moving component (2) is connected to the lifting component (3) through the limiting component (4). The fixing component (5) is positioned above the lifting component (3) and is rotatably connected to the lifting component (3).

2. A retractor suitable for shoulder arthroscopy according to claim 1, characterized in that: The moving component (2) includes a support rod (21), a card holder (22), a fixing bolt (23), a lifting rod (24), and a linear slide (25). The linear slide (25) is horizontally positioned above the operating table (1). There are two sets of lifting rods (24) respectively located at both ends of the linear slide (25). The top ends of both sets of lifting rods (24) are connected to the linear slide (25). The lower ends of both sets of lifting rods (24) are connected to a set of support rods (21). Each set of support rods (21) has a card holder (22) and a fixing bolt (23) at its lower end. The fixing bolt (23) is vertically connected to the lower part of the card holder (22). The fixing block (41) of the limiting component (4) is connected to the linear slide (25).

3. A retractor suitable for shoulder arthroscopy according to claim 2, characterized in that: The limiting component (4) includes a fixed block (41), a movable block (42), a first motor (43), a first screw (44), a claw (45), and a hinge rod (46). The first motor (43) is located at one end of the fixed block (41) and connected to the side wall of the fixed block (41). The first screw (44) is horizontally arranged inside the fixed block (41) and connected to the first motor (43). There are two sets of claws (45) at both ends of the fixed block (41). Each set of claws (45) is connected to a movable block (42) below it. The middle position of the two sets of claws (45) is connected to the hinge rod (46). The two sets of movable blocks (42) are slidably arranged inside the fixed block (41). The first screw (44) is connected to the movable block (42). The lifting component (3) is slidably connected inside the fixed block (41).

4. A retractor suitable for shoulder arthroscopy according to claim 3, characterized in that: The lifting assembly (3) includes a fixed plate (31), a lifting plate (32), scissor arms (33), a sliding block (34), a second screw (35), and a handle (36). The fixed plate (31) is slidably connected to the fixed block (41). The lifting plate (32) is located above the fixed plate (31). There are two sets of scissor arms (33), both of which are located in the middle of the lifting plate (32) and the fixed plate (31). The sliding block (34) is slidably set on the fixed plate (31), and both ends of the sliding block (34) are connected to the two sets of scissor arms (33) respectively. The second screw (35) is rotatably connected to the fixed plate (31) and is connected to the sliding block (34). The handle (36) is located on the outside of the fixed plate (31) and is connected to the second screw (35). The fixed assembly (5) is connected to the lifting plate (32).

5. A retractor suitable for shoulder arthroscopy according to claim 4, characterized in that: The fixing plate (31) has multiple slots (6) corresponding to the hooks (45).

6. A retractor suitable for shoulder arthroscopy according to claim 4, characterized in that: The fixing assembly (5) includes a first support plate (51), a second support plate (52), an electric push rod (53), a connecting plate (54), a damping rotator (55), and a traction device (7). The damping rotator (55) is located below the connecting plate (54) and at one end of the connecting plate (54). The connecting plate (54) is connected to the lifting plate (32) through the rotator. The first support plate (51) is located above the connecting plate (54) and is hinged above the connecting plate (54). On the connecting plate (54), the electric push plate is located at one end of the first pallet (51) and below the first pallet (51), and the two ends of the electric push plate are connected to the connecting plate (54) and the first pallet (51) respectively. The traction device (7) is located below the first pallet (51) and at the other end of the first pallet (51), and the traction device (7) is connected to the second pallet (52). The second pallet (52) is located at one end of the first pallet (51) and is slidably connected to the first pallet (51).

7. A retractor suitable for shoulder arthroscopy according to claim 6, characterized in that: The second tray (52) is provided with straps (8).

8. A retractor suitable for shoulder arthroscopy according to claim 6, characterized in that: The traction device (7) includes a housing (71), a second motor (72), a cam (73), a moving rod (74), and a spring (75). The housing (71) is connected to the first support plate (51). The cam (73) is rotatably disposed inside the housing (71). The second motor (72) is connected to the bottom plate of the housing (71) and is connected to the cam (73). The moving rod (74) is located on one side of the cam (73). One end of the moving rod (74) abuts against the cam (73), and the other end of the moving rod (74) is connected to the second support plate (52). The spring (75) is sleeved on the moving rod (74), and both ends of the spring (75) are connected to the housing (71) and the moving rod (74) respectively.

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