Rapid binding device for traumatic orthopedics department

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a rapid binding device for traumatic orthopedics, which comprises a base, a binding mechanism is arranged on the outer wall of the base, fixing mechanisms are fixedly connected to the outer wall of the base and the front and back of the binding mechanism, and a controller is mounted on the outer wall of the base. The back surface of the base is fixedly connected with a power plug; the binding mechanism comprises a fixing seat fixedly connected to the top of the base, a rotating ring is rotationally connected to the interior of the fixing seat, a transmission gear is fixedly connected to the outer wall of the rotating ring and located in the fixing seat, and a driving gear is connected to the outer wall of the transmission gear and located in the fixing seat in an engaged mode; a driving motor is fixedly connected to the center of the outer wall of the driving gear, the rapid binding device for traumatic orthopedics is designed, the binding mechanism in the device is used for binding the wound of a patient, and the problems that when existing binding equipment is used, the wound cannot be bound rapidly, and the binding efficiency is low are solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a rapid bandaging device for trauma orthopedics. Background Art

[0002] Bandaging equipment is a device used for bandaging wounds in orthopedic trauma, but existing bandaging equipment still has shortcomings, specifically: existing bandaging equipment cannot bandage wounds quickly when used, and the bandaging efficiency is low.

[0003] Therefore, a rapid bandaging device for trauma orthopedics is needed to solve the problems raised in the above background technology. Summary of the invention

[0004] The object of the present invention is to provide a rapid bandaging device for trauma orthopedics to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A rapid bandaging device for trauma orthopedics, comprising a base, a bandaging mechanism is arranged on the outer wall of the base, a fixing mechanism is fixedly connected to the outer wall of the base and to the front and back of the bandaging mechanism, a controller is installed on the outer wall of the base, and a power plug is fixedly connected to the back of the base; The wrapping mechanism includes a fixed seat fixedly connected to the top of the base, the fixed seat is rotatably connected with a rotating ring inside the fixed seat, the outer wall of the rotating ring and the inside of the fixed seat are fixedly connected with a transmission gear, the outer wall of the transmission gear and the driving gear are meshed and connected in the fixed seat, and the driving motor is fixedly connected at the center of the outer wall of the driving gear, the top and bottom of the rotating ring are fixedly connected to the mounting seat, the front and back sides at the inner center of the mounting seat are rotatably connected to the driving shaft, the outer wall of the driving shaft is slidably connected with a connecting sleeve, the outer wall of the connecting sleeve and a clamping plate are fixedly connected at one end of the impeller driving shaft, the outer wall of the connecting sleeve is rotatably connected with a connecting rod in the mounting seat, the outer wall of the connecting rod and a micro-electric push rod are fixedly connected at one end away from the connecting sleeve, both sides at the inner center of the base are fixedly connected with electric slide rails, the outer wall of the electric slide rail and a slide table are installed below the fixed seat, and the outer wall of the driving shaft and a servo motor are fixedly connected at one end away from the connecting sleeve.

[0006] As a preferred solution of the present invention, the fixing mechanism includes a support seat fixedly connected to the front and back sides of the top center of the base, the top of the support seat is fixedly connected to a strap, the outer wall of the support seat and the adjusting seat are fixedly connected at the corresponding position of the strap, the inner wall of the strap is fixedly connected to a fixing strip, the outer wall of the fixing strip is fixedly connected to a clamping block, the interior of the support seat and the position of the clamping block is slidably connected to a limiting block, the outer wall of the limiting block and the interior of the adjusting seat are fixedly connected to a reset spring, and the outer wall of the limiting block is fixedly connected to an adjustment rope.

[0007] As a preferred solution of the present invention, the base is made of aluminum alloy, and the connection between the controller and the power plug is an electrical connection.

[0008] As a preferred solution of the present invention, the fixed seat, rotating ring, mounting seat, connecting sleeve and connecting rod are all made of aluminum alloy, the fixed seat and rotating ring are both designed as annular structures, the connecting sleeve penetrates and extends outside the mounting seat, and the connection method between the servo motor and the mounting seat, the slide and the fixed seat, the micro electric push rod and the mounting seat, and the drive motor and the fixed seat are all fixed connections.

[0009] As a preferred solution of the present invention, the splint is made of ABS plastic, the splint is designed in a convex shape, the connecting rod passes through and extends outside the connecting sleeve, and the connecting rod is designed in an L-shaped structure.

[0010] As a preferred solution of the present invention, the drive shaft, connecting sleeve, servo motor, and splint are each provided with two groups, the connecting rod and micro electric push rod are each provided with multiple groups, the drive shaft is designed as a prismatic structure, the mounting seat is designed as a concave structure, and the connection method between the drive gear and the fixed seat is a rotational connection.

[0011] As a preferred solution of the present invention, the support seat, the adjustment seat, the limit block and the clamping block are all made of ABS plastic, the support seat is designed as a Y-shaped structure, and the clamping block is provided in multiple groups.

[0012] As a preferred solution of the present invention, the clamping block and the limit block are both designed as trapezoidal structures, the connection between the reset spring and the adjustment seat is a fixed connection, and the connection between the clamping block and the limit block and the adjustment rope and the adjustment seat are all sliding connections.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a rapid bandaging device for trauma orthopedics is designed, and the bandaging mechanism in the device is used to bandage the patient's wound, fix the patient's injured limb on the support seat, and then put the bandage roll into the mounting seat, and the controller starts the micro-electric push rod, which drives the connecting sleeve to move outward through the connecting rod, and the connecting sleeve moving outward will push the splint to move closer and resist the bandage roll, fix the bandage roll in the mounting seat, and fix one end of the bandage roll on the patient's injured part. The controller starts the servo motor and the driving motor, and the servo motor drives the connecting sleeve to rotate through the driving shaft, and the rotating connecting sleeve drives the bandage roll to rotate through the splint, and the rotating bandage roll releases the bandage, and at the same time, the driving motor drives the transmission gear and the rotating ring to rotate through the driving gear, and the rotating ring drives the mounting seat and the bandage roll to rotate around the patient's limb, so that the bandage is wrapped around the patient's injured part, and the bandaging speed is fast, which solves the problem that the existing bandaging equipment cannot quickly bandage the wound when in use and the bandaging efficiency is low.

[0014] 2. In the present invention, a rapid bandaging device for trauma orthopedics is designed, and the fixing mechanism in the device is used to fix the injured limb of the patient. The adjusting rope is pulled, and the adjusting rope drives the limit block to move inward. The limit block moving inward no longer jams the jamming block. The strap is pulled to remove the strap from the adjusting seat, and then the injured limb of the patient is placed on the supporting seat. The strap is inserted into the adjusting seat, and the strap is pulled to press the patient's limb. The adjusting rope is loosened, and the reset spring pushes the limit block to move in the opposite direction. The limit block moving in the opposite direction jams the jamming block. The strap fixes the patient's limb on the supporting seat, and the fixing operation is more convenient.

[0015] 3. In the present invention, a rapid bandaging device for trauma orthopedics is designed, and the clamping block and the connecting sleeve in the device are used to fix the bandage roll. The controller starts the micro-electric push rod, and the micro-electric push rod drives the connecting sleeve to move inward through the connecting rod. The connecting sleeve moving inward will drive the splint to separate from the bandage roll, and the splint no longer clamps the bandage roll. The used bandage roll is removed from the mounting seat, and new bandages are placed in the mounting seat. The controller starts the micro-electric push rod, and the micro-electric push rod drives the connecting sleeve to move outward through the connecting rod. The connecting sleeve moving outward will push the splint to approach and resist the bandage roll. The two sets of splints in the mounting seat clamp the bandage roll and fix it in the mounting seat, so it is convenient to install and remove the bandage roll, which is convenient for users to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a front cross-sectional view of the present invention.

[0018] Figure 3 It is a side sectional view of the mounting seat of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the drive shaft of the present invention.

[0020] Figure 5 It is a front cross-sectional view of the support seat of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle.

[0022] In the figure: 1. base; 2. wrapping mechanism; 3. fixing mechanism; 4. controller; 5. power plug; 201. fixing seat; 202. rotating ring; 203. transmission gear; 204. driving gear; 205. driving motor; 206. mounting seat; 207. driving shaft; 208. connecting sleeve; 209. splint; 210. connecting rod; 211. micro electric push rod; 212. electric slide rail; 213. slide table; 214. servo motor; 301. supporting seat; 302. binding strap; 303. adjusting seat; 304. fixing strip; 305. block; 306. limit block; 307. reset spring; 308. adjusting rope. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0027] For examples, see Figure 1-6 , the present invention provides a technical solution: A rapid bandaging device for trauma orthopedics, comprising a base 1, a bandaging mechanism 2 is arranged on the outer wall of the base 1, a fixing mechanism 3 is fixedly connected to the outer wall of the base 1 and the front and back sides of the bandaging mechanism 2, a controller 4 is installed on the outer wall of the base 1, and a power plug 5 is fixedly connected to the back side of the base 1; The base 1 is made of aluminum alloy, and the connection between the controller 4 and the power plug 5 is electrical connection; In this embodiment, reference Figure 2 , Figure 3 as well as Figure 4 The wrapping mechanism 2 includes a fixed seat 201 fixedly connected to the top of the base 1, a rotating ring 202 is rotatably connected inside the fixed seat 201, a transmission gear 203 is fixedly connected to the outer wall of the rotating ring 202 and inside the fixed seat 201, a driving gear 204 is meshedly connected to the outer wall of the transmission gear 203 and inside the fixed seat 201, a driving motor 205 is fixedly connected to the center of the outer wall of the driving gear 204, the top and bottom of the rotating ring 202 are fixedly connected to the mounting seat 206, the front and back sides of the inner center of the mounting seat 206 are rotatably connected to the driving shaft 207, and the outer wall of the driving shaft 207 is slidable. A connecting sleeve 208 is rotatably connected, a clamping plate 209 is fixedly connected to the outer wall of the connecting sleeve 208 and one end of the impeller driving shaft 207, a connecting rod 210 is rotatably connected to the outer wall of the connecting sleeve 208 and in the mounting seat 206, a micro electric push rod 211 is fixedly connected to the outer wall of the connecting rod 210 and at one end away from the connecting sleeve 208, electric slide rails 212 are fixedly connected to both sides of the inner center of the base 1, a slide table 213 is installed on the outer wall of the electric slide rail 212 and below the fixed seat 201, and a servo motor 214 is fixedly connected to the outer wall of the driving shaft 207 and at one end away from the connecting sleeve 208; The fixing seat 201, the rotating ring 202, the mounting seat 206, the connecting sleeve 208, and the connecting rod 210 are all made of aluminum alloy. The fixing seat 201 and the rotating ring 202 are both designed as annular structures. The connecting sleeve 208 penetrates and extends to the outside of the mounting seat 206. The servo motor 214 and the mounting seat 206, the slide 213 and the fixing seat 201, the micro electric push rod 211 and the mounting seat 206, and the drive motor 205 and the fixing seat 201 are all connected in a fixed manner. The clamping plate 209 is made of ABS plastic. 9 is a convex structure design, the connecting rod 210 penetrates and extends to the outside of the connecting sleeve 208, the connecting rod 210 is an L-shaped structure design, the driving shaft 207, the connecting sleeve 208, the servo motor 214, and the splint 209 are each provided with two groups, the connecting rod 210 and the micro electric push rod 211 are each provided with multiple groups, the driving shaft 207 is a prismatic structure design, the mounting seat 206 is a concave structure design, the driving gear 204 and the fixing seat 201 are connected in a rotating manner, the bandage roll is placed in the mounting seat 206, and the controller 4 starts the micro The miniature electric push rod 211 drives the connecting sleeve 208 to move outward through the connecting rod 210. The connecting sleeve 208 moving outward pushes the clamping plate 209 to approach and abut against the bandage roll. The two sets of clamping plates 209 in the mounting seat 206 clamp the bandage roll in the mounting seat 206. The bandage roll is untied and one end of the untied bandage is fixed to the injured part of the patient. The controller 4 starts the servo motor 214 and the drive motor 205. The servo motor 214 drives the connecting sleeve 208 to rotate through the drive shaft 207. The rotating connecting sleeve 208 The sleeve 208 drives the bandage roll to rotate through the clamp plate 209, and the rotating bandage roll releases the bandage. At the same time, the driving motor 205 drives the transmission gear 203 and the rotating ring 202 to rotate through the driving gear 204. The rotating ring 202 drives the mounting seat 206 and the bandage roll to rotate around the patient's limb. The rotating mounting seat 206 wraps the bandage around the injured part of the patient. At the same time, the controller 4 starts the electric slide rail 212, and the electric slide rail 212 drives the fixing seat 201 and the bandage roll to move forward and backward through the slide table 213, so that the bandage can cover the patient's wound. In this embodiment, reference Figure 5 and Figure 6 The fixing mechanism 3 includes a support seat 301 fixedly connected to the front and back sides of the top center of the base 1, a strap 302 is fixedly connected to the top of the support seat 301, an adjusting seat 303 is fixedly connected to the outer wall of the support seat 301 and at the corresponding position of the strap 302, a fixing strip 304 is fixedly connected to the inner wall of the strap 302, a clamping block 305 is fixedly connected to the outer wall of the fixing strip 304, a limiting block 306 is slidably connected to the inside of the support seat 301 and near the clamping block 305, a return spring 307 is fixedly connected to the outer wall of the limiting block 306 and the inside of the adjusting seat 303, and an adjusting rope 308 is fixedly connected to the outer wall of the limiting block 306; The support seat 301, the adjustment seat 303, the limit block 306 and the clamping block 305 are all made of ABS plastic. The support seat 301 is designed in a Y-shaped structure. The clamping block 305 is provided with multiple groups. The clamping block 305 and the limit block 306 are both designed in a trapezoidal structure. The connection mode of the reset spring 307 and the adjustment seat 303 is a fixed connection. The connection mode of the clamping block 305 and the limit block 306 as well as the connection mode of the adjustment rope 308 and the adjustment seat 303 are all sliding connections. Pull the adjustment rope 308, the adjustment rope 308 drives the limit block 306 to move inward, the limit block 306 moving inward falls off the clamping block 305, and the limit block 306 no longer blocks the clamping block 305. Pull the strap 302 to pull the strap 302 out of the adjustment seat 303, and then place the patient's injured limb on the support seat 303. 01, reinsert the strap 302 into the adjustment seat 303, pull the strap 302, the strap 302 moves downward along the adjustment seat 303, the downward moving strap 302 will press the patient's limb, loosen the adjustment rope 308, the reset spring 307 pushes the limit block 306 to move in the opposite direction, the limit block 306 moving in the opposite direction will jam the block 305, the strap 302 fixes the patient's limb on the support seat 301, after the bandage is completed, cut off the bandage, pull the adjustment rope 308, the adjustment rope 308 drives the limit block 306 to move inward, the limit block 306 moving inward falls off the block 305, the limit block 306 no longer jams the block 305, pull the strap 302, pull the strap 302 out of the adjustment seat 303, and move the bandaged limb of the patient out of the support seat 301.

[0028] The working process of the present invention is as follows: when the rapid bandaging device for trauma orthopedics designed by the present invention is used, the adjusting rope 308 is pulled, and the adjusting rope 308 drives the limiting block 306 to move inward, and the limiting block 306 moving inward falls off the card block 305, and the limiting block 306 no longer blocks the card block 305, and the binding strap 302 is pulled to extract the binding strap 302 from the adjusting seat 303, and then the injured limb of the patient is placed on the supporting seat 301, and the binding strap 302 is reinserted into the adjusting seat 303, and the binding strap 302 is pulled to move downward along the adjusting seat 303, and the binding strap 302 moving downward will press the patient's limb, and the adjusting rope 308 is loosened, and the reset spring 307 pushes the limiting block 306 to move in the opposite direction, and the limiting block 306 moving in the opposite direction will block the card block 305, and the binding strap 302 fixes the patient's limb on the supporting seat 301; The bandage roll is placed in the mounting seat 206, and the controller 4 starts the micro-electric push rod 211. The micro-electric push rod 211 drives the connecting sleeve 208 to move outward through the connecting rod 210. The connecting sleeve 208 moving outward pushes the splint 209 to approach and resist the bandage roll. The two groups of splints 209 in the mounting seat 206 clamp the bandage roll in the mounting seat 206. The bandage roll is untied and one end of the untied bandage is fixed to the injured part of the patient. The controller 4 starts the servo motor 214 and the drive motor 205. The servo motor 214 drives the connecting sleeve 208 through the drive shaft 207. 208 rotates, the rotating connecting sleeve 208 drives the bandage roll to rotate through the clamp plate 209, the rotating bandage roll releases the bandage, and at the same time the driving motor 205 drives the transmission gear 203 and the rotating ring 202 to rotate through the driving gear 204, the rotating ring 202 drives the mounting seat 206 and the bandage roll to rotate around the patient's limb, the rotating mounting seat 206 wraps the bandage around the injured part of the patient, and at the same time the controller 4 starts the electric slide rail 212, the electric slide rail 212 drives the fixing seat 201 and the bandage roll to move forward and backward through the slide table 213, so that the bandage can cover the patient's wound; After the bandaging is completed, the bandage is cut off, and the adjustment rope 308 is pulled, and the adjustment rope 308 drives the limit block 306 to move inward, and the limit block 306 moving inward falls off the block 305, and the limit block 306 no longer blocks the block 305, and the bandage 302 is pulled out of the adjustment seat 303, and the bandaged limb of the patient is moved out of the support seat 301; When replacing the bandage roll, the controller 4 starts the micro-electric push rod 211, and the micro-electric push rod 211 drives the connecting sleeve 208 to move inward through the connecting rod 210. The connecting sleeve 208 moving inward will drive the splint 209 to separate from the bandage roll, and the splint 209 no longer clamps the bandage roll. The used bandage roll is removed from the mounting seat 206, and new bandages are placed in the mounting seat 206. The controller 4 starts the micro-electric push rod 211, and the micro-electric push rod 211 drives the connecting sleeve 208 to move outward through the connecting rod 210. The connecting sleeve 208 moving outward will push the splint 209 to approach and resist the bandage roll, and the two sets of splints 209 in the mounting seat 206 clamp the bandage roll and fix it in the mounting seat 206.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid bandaging device for trauma orthopedics, comprising a base (1), characterized in that: The outer wall of the base (1) is provided with a binding mechanism (2), the outer wall of the base (1) and the front and back sides of the binding mechanism (2) are fixedly connected to a fixing mechanism (3), the outer wall of the base (1) is installed with a controller (4), and the back side of the base (1) is fixedly connected to a power plug (5); The binding mechanism (2) comprises a fixed seat (201) fixedly connected to the top of the base (1); a rotating ring (202) is rotatably connected inside the fixed seat (201); a transmission gear (203) is fixedly connected to the outer wall of the rotating ring (202) and inside the fixed seat (201); a driving gear (204) is meshingly connected to the outer wall of the transmission gear (203) and inside the fixed seat (201); a driving motor (205) is fixedly connected at the center of the outer wall of the driving gear (204); a mounting seat (206) is fixedly connected to the top and bottom of the rotating ring (202); a driving shaft (207) is rotatably connected to the front and back sides of the mounting seat (206) at the center; the outer wall of the driving shaft (207) is meshingly connected to the driving gear (204) and inside the fixed seat (201); The wall is slidably connected to a connecting sleeve (208); a clamping plate (209) is fixedly connected to the outer wall of the connecting sleeve (208) and at one end of the impeller drive shaft (207); a connecting rod (210) is rotatably connected to the outer wall of the connecting sleeve (208) in the mounting seat (206); a micro electric push rod (211) is fixedly connected to the outer wall of the connecting rod (210) and at an end away from the connecting sleeve (208); electric slide rails (212) are fixedly connected to both sides of the center of the base (1); a slide table (213) is installed on the outer wall of the electric slide rail (212) and below the fixed seat (201); and a servo motor (214) is fixedly connected to the outer wall of the drive shaft (207) and at one end away from the connecting sleeve (208).

2. A rapid bandaging device for trauma orthopedics according to claim 1, characterized in that: The fixing mechanism (3) comprises a support seat (301) fixedly connected to the front and back sides of the center of the top of the base (1); a binding belt (302) is fixedly connected to the top of the support seat (301); an adjustment seat (303) is fixedly connected to the outer wall of the support seat (301) and at a position corresponding to the binding belt (302); a fixing strip (304) is fixedly connected to the inner wall of the binding belt (302); a clamping block (305) is fixedly connected to the outer wall of the fixing strip (304); a limiting block (306) is slidably connected inside the support seat (301) and at a position close to the clamping block (305); a return spring (307) is fixedly connected to the outer wall of the limiting block (306) and inside the adjustment seat (303); and an adjustment rope (308) is fixedly connected to the outer wall of the limiting block (306).

3. A rapid bandaging device for trauma orthopedics according to claim 1, characterized in that: The base (1) is made of aluminum alloy, and the controller (4) is connected to the power plug (5) in an electrical manner.

4. A rapid bandaging device for trauma orthopedics according to claim 1, characterized in that: The fixed seat (201), the rotating ring (202), the mounting seat (206), the connecting sleeve (208), and the connecting rod (210) are all made of aluminum alloy; the fixed seat (201) and the rotating ring (202) are both designed as annular structures; the connecting sleeve (208) penetrates and extends outside the mounting seat (206); the connection modes of the servo motor (214) and the mounting seat (206), the sliding table (213) and the fixed seat (201), the micro electric push rod (211) and the mounting seat (206), and the driving motor (205) and the fixed seat (201) are all fixed connections.

5. The rapid bandaging device for trauma orthopedics according to claim 1, characterized in that: The clamping plate (209) is made of ABS plastic and is designed as a convex-shaped structure. The connecting rod (210) penetrates and extends outside the connecting sleeve (208) and is designed as an L-shaped structure.

6. A rapid bandaging device for trauma orthopedics according to claim 1, characterized in that: The drive shaft (207), the connecting sleeve (208), the servo motor (214), and the clamping plate (209) are each provided in two groups, and the connecting rod (210) and the micro electric push rod (211) are each provided in multiple groups. The drive shaft (207) is designed as a prismatic structure, the mounting seat (206) is designed as a concave structure, and the driving gear (204) and the fixing seat (201) are connected in a rotational manner.

7. A rapid bandaging device for trauma orthopedics according to claim 2, characterized in that: The support seat (301), the adjustment seat (303), the limit block (306) and the clamping block (305) are all made of ABS plastic. The support seat (301) is designed as a Y-shaped structure, and the clamping block (305) is provided in multiple groups.

8. A rapid bandaging device for trauma orthopedics according to claim 2, characterized in that: The clamping block (305) and the limiting block (306) are both designed as trapezoidal structures; the connection mode between the return spring (307) and the adjustment seat (303) is a fixed connection; the connection mode between the clamping block (305) and the limiting block (306) and the adjustment rope (308) and the adjustment seat (303) is a sliding connection.

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