Electric lifting platform for simulating wounded transferring

Abstract

The invention discloses an electric lifting platform for simulating wounded person transfer, and belongs to the technical field of simulation training devices, the electric lifting platform comprises a bottom plate, a multi-degree-of-freedom supporting device, a sliding stair device and a self-adaptive stretcher clamping device, the upper side of the bottom plate is provided with the multi-degree-of-freedom supporting device for simulating different transfer environment grounds, and the sliding stair device is provided with the self-adaptive stretcher clamping device. A sliding stair device for assisting an operator in climbing the output end of the multi-degree-of-freedom supporting device is installed on one side of the bottom plate, and a self-adaptive stretcher clamping device for clamping stretchers of different sizes is installed at the output end of the multi-degree-of-freedom supporting device and comprises an auxiliary lifting mechanism and a width adjusting mechanism; the output end of the multi-degree-of-freedom supporting device is provided with an auxiliary lifting mechanism for assisting the stretcher in lifting movement. In this way, the stretcher fixing device can be rapidly adjusted to adapt to different specifications of stretchers and rapidly fix the stretchers, and the stair platform can be rapidly locked and unlocked to assist in climbing a top plate.

Description

Technical Field

[0001] This invention relates to the field of simulation training device technology, specifically an electric lifting platform for simulating the transfer of wounded soldiers. Background Technology

[0002] Electric lifting platforms for simulating casualty transport are devices used to simulate the process of transporting casualties in real-world scenarios. They are mainly used for medical training and emergency drills. To simulate different transport scenarios, specific stretchers are usually used for transport. For example, the army often uses folding canvas stretchers or aluminum alloy frame stretchers. For mountain warfare, mountain rescue stretchers with pulleys and rope anchors are provided, which can slide down steep slopes for transport. The navy includes ship-mounted stretchers and water rescue stretchers. Therefore, different stretchers may be used regularly during training. In order to maintain a large range of motion to simulate real-world scenarios, the electric lifting platforms for simulating casualty transport are usually quite high, and stairs are usually required for access. After use, the stairs need to be moved away from the equipment to avoid collisions during operation.

[0003] Chinese patent CN217718865U discloses a field-condition turbulence and shaking simulation rescue training device. It comprises a cradle, a rescue training platform, and a rescue bed. The cradle is supported on a slide groove by a slider, and one end is connected to a rocking head, which drives the rocking motion. A pair of cams are mounted on the cradle, each driven by its own motor. One end of the rescue training platform is supported on the cams via a cam fork, generating turbulence, while the other end is supported on the cradle by a support spring. The rescue bed is installed on the rescue training platform for the wounded to lie flat. The cradle is a rectangular frame structure with a missing side. The rescue training platform is a flat plate installed at the missing side opening, flush with or lower than the opening of the cradle. The pair of cams are symmetrically mounted on the cradle via bearings and each has its own motor. An adjusting bolt passes through the support spring; the upper end of the adjusting bolt is fixed to the rescue training platform, and the lower end passes through a spring seat where the tightness is adjusted by an adjusting nut. The cam fork consists of a fork rod, fork wings, and fork shanks; the upper end of the fork rod is fixed to the rescue training platform.

[0004] However, the technical solution of this patent has the following problems: This patent does not allow for quick adjustment to accommodate stretchers of different sizes or for quick fixation of the stretcher, nor does it allow for quick locking and unlocking of the stair platform to assist in climbing to the top.

[0005] Based on this, the present invention designs an electric lifting platform for simulating the transfer of wounded soldiers to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an electric lifting platform for simulating the transfer of wounded soldiers.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An electric lifting platform for simulating the transfer of wounded soldiers includes a base plate, and further includes: a multi-degree-of-freedom support device, a sliding stair device, and an adaptive stretcher clamping device. The multi-degree-of-freedom support device simulating different transfer environments is installed on the upper side of the base plate. A sliding stair device is installed on one side of the base plate to assist the operator in climbing onto the output end of the multi-degree-of-freedom support device. An adaptive stretcher clamping device for clamping stretchers of different sizes is installed at the output end of the multi-degree-of-freedom support device. The adaptive stretcher clamping device includes an auxiliary lifting mechanism and a width adjustment mechanism. The output end of the multi-degree-of-freedom support device is equipped with an auxiliary lifting mechanism for assisting the stretcher in lifting and moving. The output end of the auxiliary lifting mechanism is equipped with multiple width adjustment mechanisms that adapt to the width of the stretcher. Multiple quick-fixing mechanisms for quickly fixing the stretcher are installed on the width adjustment mechanisms.

[0008] Furthermore, the auxiliary lifting mechanism includes: a support frame, a first electric cylinder, and a lifting plate. The support frame is installed at the output end of the multi-degree-of-freedom support device, and the fixed ends of multiple first electric cylinders are fixedly installed on the support frame. The lifting plate is fixedly installed on the output end of the first electric cylinder and is located on the upper side of the support frame.

[0009] Furthermore, the width adjustment mechanism includes: a width synchronous adjustment component and a quick-fixing component, with multiple width synchronous adjustment components mounted on the lifting plate and multiple quick-fixing components mounted on the width synchronous adjustment component.

[0010] Furthermore, the width synchronization adjustment component includes: a support rod, a rotating block, and a threaded rod. Two support rods are rotatably connected to the lifting plate via a rotating shaft. The support rods rotate left and right on the lifting plate. A first arc-shaped slot is provided on the side of the support rod away from the lifting plate. The rotating block is rotatably connected to the middle side of the support rod via a rotating shaft. Each rotating block is threaded with a threaded rod. The two threaded rods are symmetrical about the center of the base plate. A circular handle is fixedly installed between the two threaded rods.

[0011] Furthermore, the quick-fixing assembly includes a C-shaped plate and fixing screws. The C-shaped plate has strip-shaped openings on both the left and right sides, and a second arc-shaped slot is opened in the middle of the C-shaped plate. The C-shaped plate is located on the upper side of the support rod, and the two fixing screws are threaded through the strip-shaped openings and connected to the left and right side walls of the support rod.

[0012] Furthermore, the multi-degree-of-freedom support device includes: an electric motion platform and a top plate, the electric motion platform being fixedly installed on the base plate, the top plate being fixedly installed on the output end of the electric motion platform, and the support frame being fixedly installed on the top plate.

[0013] Furthermore, the sliding staircase device includes: a sliding docking assembly and a quick-unlocking assembly, wherein the sliding docking assembly is installed on the front side of the base plate, and two quick-unlocking assemblies are installed on the front side of the top plate.

[0014] Furthermore, the sliding docking assembly includes: a stair platform, support columns, a rotating buckle, a first torsion spring, buckle bases, and a tension spring. The stair platform is slidably connected to the front side of the base plate. The two support columns are fixedly installed on the upper side of the stair platform. The rotating buckle is rotatably connected to the end of the support column away from the stair platform via a rotating shaft. The first torsion spring is sleeved on the rotating shaft of the rotating buckle. One end of the first torsion spring is fixedly installed on the rotating buckle, and the other end of the first torsion spring is fixedly installed on the support column. The two buckle bases are fixedly installed on the front side of the top plate. The buckle bases and the rotating buckles correspond one-to-one. The rear sidewall of the rotating buckle and the front sidewall of the buckle bases are both provided with inclined surfaces. One end of the tension spring is fixedly installed on the stair platform, and the other end of the tension spring is fixedly installed on the base plate.

[0015] Furthermore, the quick unlocking component includes: a pedal and a second torsion spring. The pedal is rotatably connected to the front side of the top plate via a pivot. The second torsion spring is sleeved on the pivot of the pedal. One end of the second torsion spring is fixedly installed on the pedal, and the other end of the second torsion spring is fixedly installed on the top plate. One end of the pedal is in close contact with the rear side wall of the buckle base.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses the circular handle of the rotating width synchronous adjustment component. The rotation of the circular handle drives the threaded rod to rotate, and the rotation of the threaded rod drives the two rotating blocks to move closer or further apart, so that the two support rods rotate, and the two support rods move closer or further apart. When the distance between the two support rods is adjusted to be consistent with the distance between the stretcher handles, the handles at both ends of the stretcher are placed on the first arc-shaped slot of the support rod. At this time, the second arc-shaped slot of the C-shaped plate is put on the stretcher handle, and the two fixing screws are tightened to quickly and stably fix the C-shaped plate, which is conducive to quickly adjusting and adapting to different specifications of stretchers and quickly fixing the stretcher. 2. By pushing the sliding docking assembly's stair platform towards the top plate, the tension spring undergoes elastic deformation and is stretched. The movement of the stair platform towards the top plate causes the rotating buckle to move towards the top plate, and the rotating buckle moves towards the buckle base on the top plate. The rotating buckle engages with the buckle base, and at this point, the stair platform is quickly fixed to the front side of the top plate. The first torsion spring ensures that the rotating buckle remains firmly against the buckle base. At this point, the stretcher can be lifted onto the top plate. Stepping on the pedal causes the pedal to rotate, causing the rotating buckle to pop out from the buckle base. Releasing the pedal causes the second torsion spring to return the pedal to its original position, and the elastically deformed tension spring returns to its original position, pushing the stair platform back to its initial position. At this point, the stair platform is away from the top plate, preventing collisions between the top plate and the stair platform during movement. Simulated transfer can be performed at this time, which is beneficial for quickly locking and unlocking the stair platform to assist in climbing onto the top plate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 For along Figure 3 Partial schematic diagram of the cross-sectional view in the AA direction Figure 1 ; Figure 5 For along Figure 3 Partial schematic diagram of the cross-sectional view in the AA direction Figure 2 ; Figure 6 This is a three-dimensional structural diagram of the present invention with part of the top plate removed; Figure 7 for Figure 6 Enlarged view of A in the middle; Figure 8 This is a partial structural schematic diagram of the adaptive stretcher clamping device of the present invention; Figure 9 This is a schematic diagram of the partially opened state of the adaptive stretcher clamping device of the present invention.

[0019] The labels in the diagram represent: 1. Base plate; 2. Multi-degree-of-freedom support device; 21. Electric motion platform; 22. Top plate; 3. Sliding stair device; 31. Stair platform; 32. Support column; 33. Rotary buckle; 34. First torsion spring; 35. Buckle base; 36. Tension spring; 37. Inclined surface; 38. Pedal; 39. Second torsion spring; 4. Adaptive stretcher clamping device; 41. Support frame; 42. First electric cylinder; 43. Lifting plate; 44. Support rod; 45. Rotating block; 46. Threaded rod; 47. First arc-shaped slot; 48. Circular handle; 49. C-shaped plate; 410. Fixing screw; 411. Strip opening; 412. Second arc-shaped slot. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0023] Example 1: In some examples, please refer to Figures 1-9 An electric lifting platform for simulating the transfer of wounded soldiers includes a base plate 1, and further includes a multi-degree-of-freedom support device 2, a sliding stair device 3, and an adaptive stretcher clamping device 4. The multi-degree-of-freedom support device 2, which simulates different transfer environments, is installed on the upper side of the base plate 1. The sliding stair device 3, which assists the operator in climbing onto the output end of the multi-degree-of-freedom support device 2, is installed on one side of the base plate 1. The output end of the multi-degree-of-freedom support device 2 is equipped with an adaptive stretcher clamping device 4 for clamping stretchers of different sizes.

[0024] The adaptive stretcher clamping device 4 includes an auxiliary lifting mechanism and a width adjustment mechanism. The output end of the multi-degree-of-freedom support device 2 is equipped with an auxiliary lifting mechanism for assisting the stretcher in lifting and moving. The output end of the auxiliary lifting mechanism is equipped with multiple width adjustment mechanisms that adapt to the width of the stretcher. Multiple quick-fixing mechanisms for quickly fixing the stretcher are installed on the width adjustment mechanisms.

[0025] The auxiliary lifting mechanism includes a support frame 41, a first electric cylinder 42, and a lifting plate 43. The support frame 41 is installed at the output end of the multi-degree-of-freedom support device 2. The fixed ends of multiple first electric cylinders 42 are fixedly installed on the support frame 41. The lifting plate 43 is fixedly installed on the output end of the first electric cylinder 42. The lifting plate 43 is located on the upper side of the support frame 41. The gap between the lifting plate 43 and the support frame 41 can be covered with cloth to prevent the operator's feet from sinking in and causing harm.

[0026] The output end of the first electric cylinder 42 of the auxiliary lifting mechanism moves up and down, driving the lifting plate 43 to move up and down. The lifting plate 43 moves up and down, driving the width adjustment mechanism to move up and down. The stretcher is installed on the width adjustment mechanism, so that the stretcher can move up and down to simulate the up and down movement environment. At the same time, the distance between the stretcher and the output end of the multi-degree-of-freedom support device 2 can be quickly adjusted.

[0027] The width adjustment mechanism includes a width synchronous adjustment component and a quick fixing component. Multiple width synchronous adjustment components are mounted on the lifting plate 43, and multiple quick fixing components are mounted on the width synchronous adjustment component.

[0028] The width synchronization adjustment assembly includes: a support rod 44, a rotating block 45, and a threaded rod 46. The two support rods 44 are rotatably connected to the lifting plate 43 via a rotating shaft. The support rods 44 rotate left and right on the lifting plate 43. A first arc-shaped slot 47 is provided on the side of the support rod 44 away from the lifting plate 43. The rotating block 45 is rotatably connected to the middle side of the support rod 44 via a rotating shaft. Each rotating block 45 is threaded with a threaded rod 46. The two threaded rods 46 are symmetrical about the center of the base plate 1. A circular handle 48 is fixedly installed between the two threaded rods 46.

[0029] The quick-fixing assembly includes a C-shaped plate 49 and fixing screws 410. The C-shaped plate 49 has strip-shaped openings 411 on both the left and right sides, and a second arc-shaped slot 412 on the middle side of the C-shaped plate 49. The C-shaped plate 49 is located on the upper side of the support rod 44. The two fixing screws 410 are threaded through the strip-shaped openings 411 and connected to the left and right side walls of the support rod 44.

[0030] Rotate the circular handle 48 of the width synchronization adjustment component. The rotation of the circular handle 48 drives the threaded rod 46 to rotate. The rotation of the threaded rod 46 drives the two rotating blocks 45 to move closer or further apart, causing the two support rods 44 to rotate. When the distance between the two support rods 44 is adjusted to match the distance between the stretcher handles, place the handles at both ends of the stretcher on the first arc-shaped slot 47 of the support rod 44. At this time, put the second arc-shaped slot 412 of the C-shaped plate 49 on the stretcher handles and tighten the two fixing screws 410 to quickly and stably fix the C-shaped plate 49. This is beneficial for quickly adjusting and adapting to different sizes of stretchers and quickly fixing the stretcher.

[0031] Example 2: In some embodiments, such as Figures 1-9 As shown, in a preferred embodiment of the present invention, the multi-degree-of-freedom support device 2 includes: an electric motion platform 21 and a top plate 22. The electric motion platform 21 is fixedly installed on the base plate 1, the top plate 22 is fixedly installed on the output end of the electric motion platform 21, and the support frame 41 is fixedly installed on the top plate 22.

[0032] The electric motion platform 21 moves, driving the top plate 22 to move. The movement of the top plate 22 then drives the sliding staircase device 3 and the adaptive stretcher clamping device 4 on the top plate 22 to move, simulating different transfer environments.

[0033] Example 3: In some embodiments, such as Figures 1-9 As shown, in a preferred embodiment of the present invention, the sliding staircase device 3 includes: a sliding docking component and a quick unlocking component. The sliding docking component is installed on the front side of the base plate 1, and the two quick unlocking components are installed on the front side of the top plate 22.

[0034] The sliding docking assembly includes: a stair platform 31, support columns 32, a rotating buckle 33, a first torsion spring 34, a buckle base 35, and a tension spring 36. The stair platform 31 is slidably connected to the front side of the base plate 1. The two support columns 32 are fixedly installed on the upper side of the stair platform 31. The rotating buckle 33 is rotatably connected to the end of the support column 32 away from the stair platform 31 via a rotating shaft. The initial state between the rotating buckle 33 and the support column 32 is perpendicular to each other, and the end of the rotating buckle 33 away from the support column 32 is closer to the top plate 22. The first torsion spring 34 is sleeved on the rotating shaft of the rotating buckle 33. One end of the first torsion spring 34 is fixedly installed on the rotating buckle 33, and the other end of the first torsion spring 34 is fixedly installed on the support column 32. The two buckle bases 35 are fixedly installed on the front side of the top plate 22. The buckle bases 35 and the rotating buckles 33 correspond one to one. The rear side wall of the rotating buckle 33 and the front side wall of the buckle base 35 are both provided with inclined surfaces 37. One end of the tension spring 36 is fixedly installed on the stair platform 31, and the other end of the tension spring 36 is fixedly installed on the base plate 1.

[0035] The quick unlocking component includes: a pedal 38 and a second torsion spring 39. The pedal 38 is rotatably connected to the front side of the top plate 22 via a pivot. The second torsion spring 39 is sleeved on the pivot of the pedal 38. One end of the second torsion spring 39 is fixedly installed on the pedal 38, and the other end of the second torsion spring 39 is fixedly installed on the top plate 22. One end of the pedal 38 is in close contact with the rear side wall of the buckle base 35.

[0036] The stair platform 31 of the sliding docking assembly moves towards the top plate 22, causing the tension spring 36 to elastically deform and be stretched. This movement of the stair platform 31 towards the top plate 22 drives the rotating buckle 33 to move towards the top plate 22. The rotating buckle 33 then moves towards the buckle base 35 on the top plate 22, engaging with the buckle base 35. At this point, the stair platform 31 is quickly fixed to the front of the top plate 22. The first torsion spring 34 ensures that the rotating buckle 33 remains firmly against the buckle base 35. The stretcher can then be lifted. Rise onto the top plate 22, step on the pedal 38. The pedal 38 rotates, causing the rotating buckle 33 to rotate, which pops out of the buckle base 35. Release the pedal 38, and the second torsion spring 39 returns the pedal 38 to its original position. The elastically deformed tension spring 36 returns to its original position, pushing the stair platform 31 back to its initial position. At this time, the stair platform 31 is away from the top plate 22, avoiding collision between the top plate 22 and the stair platform 31 when it moves. At this time, a simulated transfer can be performed, which is conducive to quickly locking and unlocking the stair platform 31 to assist in climbing onto the top plate 22.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric lifting platform for simulating the transfer of wounded soldiers, comprising a base plate (1), characterized in that, Also includes: The multi-degree-of-freedom support device (2), the sliding stair device (3) and the adaptive stretcher clamping device (4) are installed on the upper side of the base plate (1). The multi-degree-of-freedom support device (2) is installed on one side of the base plate (1) to assist the operator in climbing up the output end of the multi-degree-of-freedom support device (2). The output end of the multi-degree-of-freedom support device (2) is equipped with an adaptive stretcher clamping device (4) that clamps stretchers of different sizes. The adaptive stretcher clamping device (4) includes an auxiliary lifting mechanism and a width adjustment mechanism. The output end of the multi-degree-of-freedom support device (2) is equipped with an auxiliary lifting mechanism for assisting the stretcher to move up and down. The output end of the auxiliary lifting mechanism is equipped with multiple width adjustment mechanisms for adaptive stretcher width. Multiple quick-fixing mechanisms for quick-fixing the stretcher are installed on the width adjustment mechanism.

2. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 1, characterized in that, The auxiliary lifting mechanism includes a support frame (41), a first electric cylinder (42), and a lifting plate (43). The support frame (41) is installed at the output end of the multi-degree-of-freedom support device (2). The fixed ends of multiple first electric cylinders (42) are fixedly installed on the support frame (41). The lifting plate (43) is fixedly installed on the output end of the first electric cylinder (42). The lifting plate (43) is located on the upper side of the support frame (41).

3. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 2, characterized in that, The width adjustment mechanism includes a width synchronous adjustment component and a quick fixing component. Multiple width synchronous adjustment components are installed on the lifting plate (43), and multiple quick fixing components are installed on the width synchronous adjustment component.

4. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 3, characterized in that, The width synchronization adjustment assembly includes: a support rod (44), a rotating block (45), and a threaded rod (46). The two support rods (44) are rotatably connected to the lifting plate (43) via a rotating shaft. The support rods (44) rotate left and right on the lifting plate (43). A first arc-shaped slot (47) is provided on the side of the support rod (44) away from the lifting plate (43). The rotating block (45) is rotatably connected to the middle side of the support rod (44) via a rotating shaft. Each rotating block (45) is threaded with a threaded rod (46). The two threaded rods (46) are symmetrical about the center of the base plate (1). A circular handle (48) is fixedly installed between the two threaded rods (46).

5. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 4, characterized in that, The quick-fixing assembly includes a C-shaped plate (49) and fixing screws (410). The C-shaped plate (49) has strip-shaped openings (411) on both the left and right sides, and a second arc-shaped slot (412) on the middle side of the C-shaped plate (49). The C-shaped plate (49) is located on the upper side of the support rod (44). The two fixing screws (410) are threaded through the strip-shaped openings (411) and connected to the left and right side walls of the support rod (44).

6. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 5, characterized in that, The sliding staircase device (3) includes a sliding docking component and a quick unlocking component. The sliding docking component is installed on the front side of the base plate (1), and the two quick unlocking components are installed at the output end of the multi-degree-of-freedom support device (2).

7. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 6, characterized in that, The sliding docking assembly includes: a stair platform (31), support columns (32), a rotating buckle (33), a first torsion spring (34), a buckle base (35), and a tension spring (36). The stair platform (31) is slidably connected to the front side of the base plate (1). The two support columns (32) are fixedly installed on the upper side of the stair platform (31). The rotating buckle (33) is rotatably connected to the end of the support column (32) away from the stair platform (31) via a rotating shaft. The first torsion spring (34) is sleeved on the rotating shaft of the rotating buckle (33). 4) One end is fixedly installed on the rotating buckle (33), the other end of the first torsion spring (34) is fixedly installed on the support column (32), the two buckle bases (35) are fixedly installed on the output end of the multi-degree-of-freedom support device (2), the buckle base (35) and the rotating buckle (33) correspond one to one, the rear side wall of the rotating buckle (33) and the front side wall of the buckle base (35) are both provided with inclined surfaces (37), one end of the tension spring (36) is fixedly installed on the stair platform (31), and the other end of the tension spring (36) is fixedly installed on the base plate (1).

8. The electric lifting platform for simulating the transfer of wounded soldiers according to claim 7, characterized in that, The quick unlocking component includes: a pedal (38) and a second torsion spring (39). The pedal (38) is rotatably connected to the output end of the multi-degree-of-freedom support device (2) via a rotating shaft. The second torsion spring (39) is sleeved on the rotating shaft of the pedal (38). One end of the second torsion spring (39) is fixedly installed on the pedal (38), and the other end of the second torsion spring (39) is fixedly installed on the output end of the multi-degree-of-freedom support device (2). One end of the pedal (38) is in close contact with the rear side wall of the buckle base (35).

Images