Adjustable shoulder operation support

Abstract

The utility model discloses an adjustable shoulder surgery support which comprises a head fixing structure, the front side of the head fixing structure is fixedly connected with a dismounting structure, the front side of the dismounting structure is provided with an angle adjusting structure, the head fixing structure comprises a mounting block, a rectangular groove is formed in the left portion of the rear side of the mounting block, and the angle adjusting structure is arranged in the rectangular groove. A motor groove is formed in the right side of the rear side of the mounting block, two symmetrical first rectangular through holes penetrating to the outside are formed in the top of the inner wall of the rectangular groove, and a first circular movable hole penetrating to the interior of the motor groove is formed in the right side of the inner wall of the rectangular groove. The head position stability in the operation process is ensured, so that the operation precision is improved, the support can be rapidly and conveniently disassembled and adjusted according to the specific body shape of a patient and the operation requirement by arranging the disassembling structure and the angle adjusting structure, and the flexibility and efficiency of the operation are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of surgical assistance technology, specifically an adjustable shoulder surgical support. Background Technology

[0002] In modern medicine, surgical stents play a crucial role in the surgical process. Especially in shoulder surgery, due to the complexity and wide range of motion of the shoulder joint, surgical stents need to have high stability and adjustability to ensure the smooth progress of the surgery and efficient postoperative recovery.

[0003] According to patent document CN2505067Y, this utility model discloses a shoulder surgical support device, a specialized human medical device providing positional support for clinical orthopedic shoulder surgery. It consists of a frame, an "I"-shaped backrest, and a base plate. The frame is a monolithic frame and its support structure connected by a pivot, forming an angled combination with the backrest and base plate. One end is hinged, while the other end is open for opening and closing. The base plate has positioning strips, bolts, and bolt mounting holes for adjusting the tilt angle. When the patient's head moves up and down along the long axis of the backrest, most of the surgical area of ​​the shoulder is exposed. The entire operation is simple and effective, with safe and reliable fixation. This solves the problems of patient positioning and good surgical field exposure during shoulder surgery, providing convenience for both patients and surgical personnel.

[0004] However, existing shoulder surgical stents have some shortcomings. For example, some stents have limited adjustment range and cannot meet the needs of patients with different body types; some stents are not fixed securely enough and are prone to displacement during surgery, affecting surgical precision; and some stents are complicated to adjust and take a long time, affecting surgical efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable shoulder surgical brace to address the following issues: some braces mentioned in the background art have limited adjustment ranges and cannot meet the needs of patients with different body types; some braces have insufficient fixation methods and are prone to displacement during surgery, affecting surgical precision; and some braces have complex adjustment operations that are time-consuming and affect surgical efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: including a head fixing structure, wherein a disassembly structure is fixedly connected to the front side of the head fixing structure, and an angle adjustment structure is provided on the front side of the disassembly structure;

[0007] The head fixing structure comprises a mounting block, a rectangular groove is formed on the left side of the rear side of the mounting block, a motor groove is formed on the right side of the rear side of the mounting block, two symmetric and penetrating to the outside rectangular through holes one are formed on the top of the inner wall of the rectangular groove, a circular movable hole one is formed on the right side of the inner wall of the rectangular groove and penetrates to the inside of the motor groove;

[0008] The dismounting structure comprises a convex backrest plate, dovetail grooves one are formed on the rear side of the side away from each other of the two protrusions of the convex backrest plate, convex plates are movably connected to the inner walls of the dovetail grooves one, movable plates are fixedly connected to the side away from each other of the rear side of the two convex plates, fixed plates one are fixedly connected to the side close to each other of the rear side of the two convex plates, two insertion grooves are formed on the bottom of the fixed plate one, and rubber pads are fixedly connected to the top of the fixed plate one and the movable plate.

[0009] The angle adjusting structure comprises a bed plate, an installation groove is formed on the top of the bed plate, two rectangular through holes two are formed on the rear side of the left and right sides of the inner wall of the installation groove and penetrate to the outside, fixed frames are fixedly connected to the rear side of the left and right sides of the bed plate, dovetail groove bodies are fixedly connected to the bottom of the fixed frame, connecting plates three are fixedly connected to the side away from each other of the top of the two dovetail groove bodies, support plates are fixedly connected to the rear side of the side close to each other of the top of the two dovetail groove bodies, and the top of the two support plates is movably connected with the bottom of the convex backrest plate.

[0010] Preferably, a rotating shaft is movably connected to the inner wall of the circular movable hole one, a bidirectional threaded rod is fixedly connected to the left end of the rotating shaft, a support sleeve is movably connected to the middle position of the outer wall of the bidirectional threaded rod, the outer wall of the support sleeve is fixedly connected with the inner wall of the rectangular groove, two symmetric sliding blocks are threadedly connected to the outer wall of the bidirectional threaded rod, and the left end of the bidirectional threaded rod is rotatably connected with the inner wall of the rectangular groove.

[0011] Preferably, a connecting plate one is fixedly connected to the top of the sliding block, the outer wall of the connecting plate one is movably connected with the inner wall of the rectangular through hole one, fixed blocks one are fixedly connected to the upper front side of the connecting plate one, arc-shaped clamping blocks are fixedly connected to the front side of the side close to each other of the two fixed blocks one, protective pads are fixedly connected to the inner walls of the two arc-shaped clamping blocks, a stepping motor is fixedly connected to the right end of the rotating shaft, and the bottom of the stepping motor is fixedly connected with the inner wall of the motor groove.

[0012] Preferably, the rear side of the convex backrest plate is fixedly connected with the front side of the mounting block, fixed rods are fixedly connected to the front side of the side away from each other of the two protrusions of the convex backrest plate, and the outer wall of the fixed rod is fixedly connected with a gear.

[0013] Preferably, the bottom of the convex back plate is fixedly connected with two symmetrical fixed blocks two, the lower sides of the two fixed blocks two away from each other are fixedly connected with connecting plates two, the top of the connecting plate two is provided with two circular movable holes two penetrating through the bottom on the front and back sides, the inner wall of the circular movable hole two is movably connected with a movable rod, the bottom of the two movable rods is fixedly connected with a handle, the outer wall of the movable rod is sleeved with a spring, the top of the two movable rods is fixedly connected with a fixed block three, the top of the fixed block three is fixedly connected with two insertion rods, the outer wall of the insertion rod is movably connected with the inner wall of the insertion groove.

[0014] Preferably, the inner wall of the two dovetail groove bodies is movably connected with a convex block one, the top of the convex block one is fixedly connected with a rack, the front side of the convex block one is fixedly connected with an L-shaped block, the side of the two connecting plates three close to each other is rotatably connected with the end of the two fixed rods away from each other, and the outer wall of the rack is meshingly connected with the outer wall of the gear.

[0015] Preferably, the inner wall of the mounting groove is fixedly connected with a fixed block four on the rear side, the front side of the fixed block four is fixedly connected with a pneumatic push rod, the output end of the pneumatic push rod is fixedly connected with a fixed plate two, the left and right sides of the fixed plate two are fixedly connected with extension plates, the front of the left and right sides of the inner wall of the mounting groove is provided with a dovetail groove two, the front of the side of the two extension plates away from each other is fixedly connected with a convex block two, the outer wall of the convex block two is movably connected with the inner wall of the dovetail groove two, the rear of the side of the two extension plates away from each other is fixedly connected with a connecting sliding plate, the outer wall of the connecting sliding plate is movably connected with the inner wall of the rectangular through hole two and the fixed frame, the side of the two connecting sliding plates away from each other is fixedly connected with the side of the two L-shaped blocks close to each other, the four corners of the bottom of the bed plate are fixedly connected with support columns, and the inner wall of the mounting groove is fixedly connected with a fixed cover plate.

[0016] Compared with the prior art, the head fixing structure has the advantages that:

[0017] 1. The head fixing structure can stably fix the head of the patient, ensure the stability of the head position during the operation, and improve the operation precision.

[0018] 2. The dismounting structure and the angle adjusting structure are arranged, so that the support can be quickly and conveniently dismounted and adjusted according to the specific body shape of the patient and the operation demand, and the flexibility and efficiency of the operation are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 It is a structural sectional view of the head fixing structure of the utility model.

[0021] Figure 3 It is the structural schematic view of the dismounting structure of the utility model.

[0022] Figure 4 It is the structural section view of the angle adjusting structure of the utility model.

[0023] In the drawing: 1, head fixing structure; 2, dismounting structure; 3, angle adjusting structure; 11, mounting block; 12, rectangular groove; 13, motor groove; 14, rotating shaft; 15, two-way threaded rod; 16, support sleeve; 17, sliding block; 18, rectangular through hole one; 19, connecting plate one; 10, fixed block one; 101, arc-shaped clamping block; 102, protective pad; 103, stepping motor; 21, convex backrest plate; 22, dovetail groove one; 23, convex plate; 24, movable plate; 25, fixed plate one; 26, insertion groove; 27, rubber pad; 28, fixed rod; 29, gear; 20, fixed block two; 201, connecting plate two; 202, movable rod; 203, spring; 204, fixed block three; 205, insertion rod; 206, handle; 31, bed plate; 32, mounting groove; 33, rectangular through hole two; 34, fixed frame; 35, dovetail groove body; 36, connecting plate three; 37, support plate; 38, convex block one; 39, L-shaped block; 30, pneumatic push rod; 301, fixed plate two; 302, extension plate; 303, dovetail groove two; 304, convex block two; 305, connecting sliding plate; 306, support column; 307, fixed cover plate; 308, rack; 309, fixed block four. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figure 1 , including head fixing structure 1, the front side of head fixing structure 1 is fixedly connected with dismounting structure 2, and the front side of dismounting structure 2 is provided with angle adjusting structure 3.

[0026] Please refer to Figure 2The head fixing structure 1 comprises a mounting block 11, a rectangular slot 12 is formed on the left side of the rear side of the mounting block 11, a motor slot 13 is formed on the right side of the rear side of the mounting block 11, two symmetrical and penetrating to the outside rectangular through holes one 18 are formed on the top of the inner wall of the rectangular slot 12, a circular movable hole one is formed on the right side of the inner wall of the rectangular slot 12 and penetrates to the inside of the motor slot 13, a rotating shaft 14 is movably connected to the inner wall of the circular movable hole one, a bidirectional threaded rod 15 is fixedly connected to the left end of the rotating shaft 14, a supporting sleeve 16 is movably connected to the middle position of the outer wall of the bidirectional threaded rod 15, the outer wall of the supporting sleeve 16 is fixedly connected to the inner wall of the rectangular slot 12, two symmetrical sliding blocks 17 are threadedly connected to the outer wall of the bidirectional threaded rod 15, the left end of the bidirectional threaded rod 15 is rotatably connected to the inner wall of the rectangular slot 12, a connecting plate one 19 is fixedly connected to the top of the sliding block 17, the outer wall of the connecting plate one 19 is movably connected to the inner wall of the rectangular through hole one 18, a fixed block one 10 is fixedly connected to the upper front side of the connecting plate one 19, an arc clamping block 101 is fixedly connected to the front side of the side close to each other of the two fixed block ones 10, a protective pad 102 is fixedly connected to the inner wall of the arc clamping block 101, a stepping motor 103 is fixedly connected to the right end of the rotating shaft 14, and the bottom of the stepping motor 103 is fixedly connected to the inner wall of the motor slot 13.

[0027] By starting the stepping motor 103, the rotating shaft 14 is rotated, and then the bidirectional threaded rod 15 is rotated, so that the two sliding blocks 17 move inwards and outwards along the outer wall of the bidirectional threaded rod 15 at the same time, and the position adjustment of the connecting plate one 19 is realized. The movement of the connecting plate one 19 drives the fixed block one 10 and the arc clamping block 101 to move synchronously, so as to adjust the clamping position of the front side of the head fixing structure 1. Since the inner wall of the arc clamping block 101 is fixedly connected with the protective pad 102, soft support can be provided when clamping the head, and the pressure and discomfort of the head are reduced.

[0028] Please refer to Figures 3-4, the dismounting structure 2 comprises a convex back plate 21, dovetail grooves one 22 are arranged at the rear of the two protruding sides of the convex back plate 21 away from each other, convex plates 23 are movably connected to the inner walls of the dovetail grooves one 22, movable plates 24 are fixedly connected to the rear sides of the two convex plates 23 away from each other, fixed plates one 25 are fixedly connected to the rear sides of the two convex plates 23 close to each other, two insertion grooves 26 are arranged at the bottom of the fixed plates one 25, rubber pads 27 are fixedly connected to the top of the fixed plates one 25 and the movable plates 24, the rear side of the convex back plate 21 is fixedly connected to the front side of the mounting block 11, fixed rods 28 are fixedly connected to the front of the two protruding sides of the convex back plate 21 away from each other, gears 29 are fixedly connected to the outer wall of the fixed rods 28, two symmetrical fixed blocks two 20 are fixedly connected to the bottom of the convex back plate 21, connecting plates two 201 are fixedly connected to the lower side of the two fixed blocks two 20 away from each other, two circular movable holes two penetrating through the bottom are arranged at the front and rear sides of the top of the connecting plates two 201, movable rods 202 are movably connected to the inner wall of the circular movable holes two, handles 206 are fixedly connected to the bottom of the two movable rods 202, springs 203 are sleeved on the outer wall of the movable rods 202, fixed blocks three 204 are fixedly connected to the top of the two movable rods 202, two insertion rods 205 are fixedly connected to the top of the fixed blocks three 204, the outer wall of the insertion rods 205 is movably connected to the inner wall of the insertion grooves 26, the angle adjusting structure 3 comprises a bed plate 31, an installation groove 32 is arranged at the top of the bed plate 31, rectangular through holes two 33 penetrating through the outside are arranged at the rear of the left and right sides of the inner wall of the installation groove 32, fixed frames 34 are fixedly connected to the rear of the left and right sides of the bed plate 31, dovetail groove bodies 35 are fixedly connected to the bottom of the fixed frames 34, connecting plates three 36 are fixedly connected to the top of the two dovetail groove bodies 35 away from each other, support plates 37 are fixedly connected to the rear of the top of the two dovetail groove bodies 35 close to each other, the top of the two support plates 37 is movably connected to the bottom of the convex back plate 21, convex blocks one 38 are movably connected to the inner wall of the two dovetail groove bodies 35, a gear rack 308 is fixedly connected to the top of the convex blocks one 38, L-shaped blocks 39 are fixedly connected to the front side of the convex blocks one 38, the side of the two connecting plates three 36 close to each other is rotatably connected to the end of the two fixed rods 28 away from each other, the outer wall of the gear rack 308 is meshedly connected to the outer wall of the gear 29,The inner wall rear side of the mounting groove 32 is fixedly connected with a fixed block four 309, the front side of the fixed block four 309 is fixedly connected with a pneumatic push rod 30, the output end of the pneumatic push rod 30 is fixedly connected with a fixed plate two 301, the left and right sides of the fixed plate two 301 are both fixedly connected with an extension plate 302, the front sides of the left and right sides of the inner wall of the mounting groove 32 are both provided with dovetail grooves two 303, the front sides of the sides, away from each other, of the two extension plates 302 are both fixedly connected with convex blocks two 304, the outer wall of the convex block two 304 is movably connected with the inner wall of the dovetail groove two 303, the rear sides of the sides, away from each other, of the two extension plates 302 are both fixedly connected with connecting sliding plates 305, the outer wall of the connecting sliding plate 305 is movably connected with the inner wall of the rectangular through hole two 33 and the fixed frame 34, the side, away from each other, of the two connecting sliding plates 305 is fixedly connected with the side, close to each other, of the protrusions of the two L-shaped blocks 39, the four corners of the bottom of the bed plate 31 are all fixedly connected with support columns 306, and the inner wall top of the mounting groove 32 is fixedly connected with a fixed cover plate 307.

[0029] The pneumatic push rod 30 is started to drive the fixed plate two 301 to move, the fixed plate two 301 moves to drive the extension plate 302 and the connecting sliding plate 305 to move, the connecting sliding plate 305 slides in the rectangular through hole two 33 and the fixed frame 34, and then the L-shaped block 39 is pushed to drive the convex block one 38 to slide in the inner wall of the dovetail groove body 35, the convex block one 38 moves to drive the rack 308 to move and drive the gear 29 to rotate, so that the included angle between the bed plate 31 and the convex backrest plate 21 is changed. The adjustment of the bed plate 31 enables the patient to find the most comfortable lying angle, thereby improving the treatment and rest effect. Meanwhile, the convex block one 38 enables the rack 308 to remain stable during the movement, avoiding unnecessary shaking. Meanwhile, according to the need of the operation, the corresponding handle 206 is pulled to enable the two movable rods 202 to slide in the two circular movable holes two, and then drive the fixed block three 204 to move. The movement of the fixed block three 204 drives the plug rod 205 to slide in the plug groove 26, so as to realize the disassembly of the movable plate 24, the fixed plate one 25 and the rubber pad 27. According to the position of the patient's affected area, the corresponding movable plate 24, fixed plate one 25 and rubber pad 27 are disassembled, effectively expanding the shoulder perspective area and providing convenience for the use of doctors.

[0030] Working principle:

[0031] The rotation of the rotating shaft 14 is realized by starting the stepper motor 103, and the bidirectional screw rod 15 is rotated, so that the two sliding blocks 17 move in and out along the outer wall of the bidirectional screw rod 15, and the position adjustment of the connecting plate 19 is realized. The movement of the connecting plate 19 drives the fixed block 10 and the arc-shaped clamping block 101 to move synchronously, so that the front clamping position of the head fixing structure 1 is adjusted. Since the inner wall of the arc-shaped clamping block 101 is fixedly connected with the protective pad 102, soft support can be provided when the head is clamped, and the pressure and discomfort of the head are reduced;

[0032] The movement of the fixed plate 301 drives the extension plate 302 and the connecting sliding plate 305 to move, the connecting sliding plate 305 slides in the rectangular through hole 33 and the fixed frame 34, and then pushes the L-shaped block 39 so that the convex block 38 slides in the inner wall of the dovetail groove body 35. The movement of the convex block 38 drives the rack 308 to move and drives the gear 29 to rotate, so that the included angle between the bed plate 31 and the convex backrest plate 21 is changed. The adjustment of the bed plate 31 enables the patient to find the most comfortable lying angle, thereby improving the treatment and rest effect. At the same time, the convex block 38 enables the rack 308 to remain stable during movement, avoiding unnecessary shaking. At the same time, according to the needs of the operation, the corresponding handle 206 is pulled, so that the two movable rods 202 slide in the two circular movable holes, and then drive the fixed block 204 to move. The movement of the fixed block 204 drives the plug rod 205 to slide in the plug groove 26, so as to realize the disassembly of the movable plate 24, the fixed plate 25 and the rubber pad 27. According to the position of the patient's affected area, the corresponding movable plate 24, fixed plate 25 and rubber pad 27 are disassembled, which effectively expands the shoulder perspective area and provides convenience for the use of doctors.

[0033] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An adjustable shoulder surgical support comprising a head fixation structure (1), characterized in that: The front side of the head fixing structure (1) is fixedly connected with a disassembly structure (2), and the front side of the disassembly structure (2) is provided with an angle adjusting structure (3); The head fixing structure (1) comprises a mounting block (11), a rectangular groove (12) is formed in the left rear side of the mounting block (11), a motor groove (13) is formed in the right rear side of the mounting block (11), two symmetrical and penetrating rectangular through holes (18) are formed in the top inner wall of the rectangular groove (12), and a circular movable hole (1) penetrating into the interior of the motor groove (13) is formed in the right inner wall of the rectangular groove (12). The disassembly structure (2) comprises a convex backrest plate (21), dovetail grooves (22) are formed in the rear sides of the two protrusions of the convex backrest plate (21) away from each other, convex plates (23) are movably connected to the inner walls of the dovetail grooves (22), movable plates (24) are fixedly connected to the rear sides of the two convex plates (23) away from each other, fixed plates (25) are fixedly connected to the rear sides of the two convex plates (23) close to each other, two insertion grooves (26) are formed in the bottom of the fixed plate (25), and rubber pads (27) are fixedly connected to the top of the fixed plate (25) and the movable plate (24). The angle adjusting structure (3) comprises a bed plate (31), an installation groove (32) is formed in the top of the bed plate (31), two rectangular through holes (33) penetrating to the outside are formed in the rear sides of the left and right inner walls of the installation groove (32), fixed frames (34) are fixedly connected to the rear sides of the left and right sides of the bed plate (31), dovetail groove bodies (35) are fixedly connected to the bottom of the fixed frame (34), connecting plates (36) are fixedly connected to the top of the two dovetail groove bodies (35) away from each other, support plates (37) are fixedly connected to the rear sides of the top of the two dovetail groove bodies (35) close to each other, and the top of the two support plates (37) is movably connected to the bottom of the convex backrest plate (21).

2. An adjustable shoulder surgical support as defined in claim 1, wherein: A rotating shaft (14) is movably connected to the inner wall of the circular movable hole (1), a bidirectional threaded rod (15) is fixedly connected to the left end of the rotating shaft (14), a support sleeve (16) is movably connected to the middle position of the outer wall of the bidirectional threaded rod (15), the outer wall of the support sleeve (16) is fixedly connected to the inner wall of the rectangular groove (12), two symmetrical sliding blocks (17) are threadedly connected to the outer wall of the bidirectional threaded rod (15), and the left end of the bidirectional threaded rod (15) is rotatably connected to the inner wall of the rectangular groove (12).

3. An adjustable shoulder surgical brace according to claim 2, wherein: The top of the sliding block (17) is fixedly connected with a connecting plate one (19), the outer wall of the connecting plate one (19) is movably connected with the inner wall of the rectangular through hole one (18), the front side of the connecting plate one (19) is fixedly connected with a fixed block one (10), the front of the mutually close side of the two fixed block one (10) is fixedly connected with an arc clamping block (101), the inner wall of the two arc clamping blocks (101) is fixedly connected with a protective pad (102), the right end of the rotating shaft (14) is fixedly connected with a stepping motor (103), and the bottom of the stepping motor (103) is fixedly connected with the inner wall of the motor groove (13).

4. An adjustable shoulder surgical brace according to claim 1, wherein: The rear side of the convex backrest plate (21) is fixedly connected with the front side of the mounting block (11), the front of the mutually far side of the two protrusions of the convex backrest plate (21) is fixedly connected with a fixed rod (28), and the outer wall of the fixed rod (28) is fixedly connected with a gear (29).

5. An adjustable shoulder surgical brace according to claim 1, wherein: The bottom of the convex backrest plate (21) is fixedly connected with two symmetrical fixed block two (20), the lower side of the mutually far side of the two fixed block two (20) is fixedly connected with a connecting plate two (201), two circular movable holes two penetrating to the bottom are formed in the top of the connecting plate two (201), the inner wall of the circular movable hole two is movably connected with a movable rod (202), the bottom of the two movable rods (202) is fixedly connected with a handle (206), the outer wall of the movable rod (202) is sleeved with a spring (203) on the top, the top of the two movable rods (202) is fixedly connected with a fixed block three (204), the top of the fixed block three (204) is fixedly connected with two plug rods (205), and the outer wall of the plug rod (205) is movably connected with the inner wall of the plug groove (26).

6. An adjustable shoulder surgical brace according to claim 1, wherein: The inner wall of the two dovetail groove bodies (35) is movably connected with a convex block one (38), the top of the convex block one (38) is fixedly connected with a rack (308), the front side of the convex block one (38) is fixedly connected with an L-shaped block (39), the side of the two connecting plate three (36) close to each other is rotatably connected with the end of the two fixed rods (28) away from each other, and the outer wall of the rack (308) is meshingly connected with the outer wall of the gear (29).

7. An adjustable shoulder surgical brace according to claim 1, wherein: The inner wall rear side of mounting groove (32) is fixedly connected with fixed block four (309), the front side of fixed block four (309) is fixedly connected with pneumatic push rod (30), the output end of pneumatic push rod (30) is fixedly connected with fixed plate two (301), the left and right sides of fixed plate two (301) are fixedly connected with extension plate (302), the front of the left and right sides of the inner wall of mounting groove (32) is provided with swallow tail groove two (303), the front of the side, away from each other of two extension plates (302), is fixedly connected with convex block two (304), the outer wall of convex block two (304) is movably connected with the inner wall of swallow tail groove two (303), the rear of the side, away from each other of two extension plates (302), is fixedly connected with connecting sliding plate (305), the outer wall of connecting sliding plate (305) is movably connected with the inner wall of rectangular through hole two (33), fixed frame (34), the side, away from each other of two connecting sliding plates (305) is fixedly connected with the side, close to each other of the protrusions of two L-shaped blocks (39), the four corners of bed plate (31) bottom are fixedly connected with support column (306), the upper of the inner wall of mounting groove (32) is fixedly connected with fixed cover plate (307).

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