CN113978771A

CN113978771A - Body limiting device

Info

Publication number: CN113978771A
Application number: CN202111267085.6A
Authority: CN
Inventors: 陆一凡; 房健永; 杨逸斐; 杨飞; 岳洪浩
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-01-28
Anticipated expiration: 2041-10-28
Also published as: CN113978771B

Abstract

A body limiting device belongs to the technical field of manned spaceflight. The invention solves the problems that the existing limiting device has smaller adjustable range, cannot adapt to the requirements of people with different heights and is inconvenient to disassemble and unfold. The leg limiting assemblies comprise first supporting assemblies and two leg limiting rollers symmetrically arranged on two sides of the first supporting assemblies, the leg limiting assemblies comprise second supporting assemblies and two groups of leg limiting rollers symmetrically arranged on two sides of the second supporting assemblies, the first supporting assemblies and the second supporting assemblies are respectively arranged on the vertical beams through joint locking mechanisms, and the position fixing and the angle adjustment between the leg limiting assemblies and the vertical beams and between the leg limiting assemblies and the vertical beams are realized through the joint locking mechanisms. Through the adjustment of the foot limiting component and the leg limiting component, the size requirements of people with different heights are met. Through joint locking mechanism, make health stop device can realize great exhibition ratio to reduce the volume effectively, be convenient for transport between the space station cabin door.

Description

Body limiting device

Technical Field

The invention relates to a body limiting device, and belongs to the technical field of manned spaceflight.

Background

With the continuous maturity of manned aerospace technology, the in-orbit activities of astronauts are more and more diversified. On one hand, the astronauts flying for a long time easily lose bones under the space weightless environment, so a large amount of exercise needs to be done every day, and the longer the flying time is, the exercise intensity is gradually increased; on the other hand, due to the complexity of the on-orbit operation task of the spaceflight, the operation tasks of the spacemen inside and outside the cabin are more and more abundant. The body limiting device is an essential auxiliary facility for the astronaut to carry out in-orbit activities, and the good body limiting device not only can design enough extension space for the athlete, but also can ensure the safety of in-orbit activities of the astronaut. Therefore, the development of the body limiting device for limiting the lower body of the human body and assisting the astronaut to stay in orbit is a problem to be solved urgently.

Disclosure of Invention

The invention further provides a body limiting device for solving the technical problems.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a body limiting device comprises a base, a vertical beam, a leg limiting component, a foot limiting component and a plurality of joint locking mechanisms, wherein the bottom end of the vertical beam is fixedly arranged on the base,

the leg limiting assemblies comprise first supporting assemblies and two leg limiting rollers symmetrically arranged on two sides of the first supporting assemblies, the leg limiting assemblies comprise second supporting assemblies and two groups of foot limiting rollers symmetrically arranged on two sides of the second supporting assemblies, the first supporting assemblies and the second supporting assemblies are respectively arranged on the vertical beams through joint locking mechanisms, and the position fixing and the angle adjustment between the leg limiting assemblies and the vertical beams and between the leg limiting assemblies and the vertical beams are realized through the joint locking mechanisms.

Furthermore, the joint locking mechanism comprises a rotating shaft, a threaded sleeve for locking and a conical cover, two components connected through the joint locking mechanism are a first connected rod and a second connected rod respectively, wherein one end of the second connected rod is provided with a first U-shaped through groove, one end of the first connected rod is inserted in the first U-shaped through groove and is rotationally connected with the second connected rod through a rotating shaft, the conical cover and the locking threaded sleeve are sequentially sleeved on the rotating shaft at the outer side of the second connected rod, the conical cover and the rotating shaft as well as the first connected rod and the rotating shaft are fixedly connected in the circumferential direction, the locking threaded sleeve and the rotating shaft are connected in a threaded manner, the outer wall of one side of the second connected rod is provided with a plurality of conical grooves, and the plurality of conical grooves are arranged along the circumferential direction of the rotating shaft, a plurality of conical teeth are machined on one side of the conical cover in the circumferential direction, and the plurality of conical teeth and the plurality of conical grooves are arranged in a one-to-one correspondence mode.

Further, a bearing is arranged between the rotating shaft and the second connected rod.

Furthermore, rectangular through holes are respectively formed in one end of the first connected rod and the center of the conical cover, and the sections of the rotating shaft penetrating into the first connected rod and the rotating shaft penetrating into the conical cover are both rectangular.

Further, first supporting component includes first shank support arm, second shank support arm and the spacing support of shank, first shank support arm with connect through joint locking mechanism between the second shank support arm, second shank support arm passes through joint locking mechanism and is connected with erecting the roof beam, and the one end of keeping away from second shank support arm is adorned admittedly to the spacing support level of shank on first shank support arm, corresponds between the both ends of two spacing rollers of shank and the spacing support of shank to roll over exhibition mechanism through two joints and be connected, rolls over the expansion and folding between the spacing roller of shank and the spacing support of shank through the joint and roll over the mechanism realization.

Further, the second supporting component comprises a first foot supporting arm, a second foot supporting arm and a foot limiting support, each group of foot limiting rollers comprises a foot upper limiting roller and a foot lower limiting roller which are arranged in parallel, the first foot supporting arm is connected with the second foot supporting arm and the foot limiting support and the first foot supporting arm through joint locking mechanisms respectively, the second foot supporting arm is connected with a vertical beam through the joint locking mechanisms, the two foot upper limiting rollers and the two foot lower limiting rollers are connected through four joint folding and unfolding mechanisms correspondingly, and the unfolding and folding between the foot limiting rollers and the foot limiting support are realized through the joint folding and unfolding mechanisms.

Furthermore, the joint folding and unfolding mechanism comprises a threaded sleeve for folding and unfolding and a pin shaft, the two components connected through the joint folding and unfolding mechanism are respectively a roller shaft and a support, one end of the support is provided with a second U-shaped through groove, one end of the roller shaft is inserted into the second U-shaped through groove, the roller shaft is hinged with the support through the pin shaft, the threaded sleeve for folding and unfolding is simultaneously sleeved at one end part of the support and one end part of the roller shaft, and the threaded sleeve for folding and unfolding is respectively in threaded connection with the support and the roller shaft; a clamping groove is formed in the side wall of one end of the roll shaft, and when the roll shaft and the support are arranged perpendicular to each other, one end of the threaded sleeve for folding and unfolding is clamped in the clamping groove.

Furthermore, a quick-release mechanism is arranged between the vertical beam and the base, the quick-release mechanism comprises a clamping seat and a cam wrench, the clamping seat is fixedly arranged on the base, the bottom end of the vertical beam is inserted into the clamping seat, and the clamping seat and the vertical beam are clamped and fixed through the cam wrench.

Furthermore, the first connected rod and the second connected rod are both aluminum alloy pieces, and the cone cover, the rotating shaft and the locking threaded sleeve are all stainless steel pieces.

Furthermore, the main structure parts of the two foot upper limit rollers and the two foot lower limit rollers are all aluminum alloy wall tubes, and the parts in contact with human bodies are made of polyurethane foam materials.

Compared with the prior art, the invention has the following effects:

from the aspect of realizing functions, the invention can provide the restraint and the limit auxiliary support for the lower half of the human body, and meet the requirement of the astronaut for releasing both hands to move; through the adjustment of the foot limiting component and the leg limiting component, the size requirements of people with different heights are met.

From the angle of design universalization, be provided with the joint locking mechanism of commonality among the health stop device, can expand in a flexible way, realize quick on-orbit change and maintenance.

From the angle of transporting convenience, through joint locking mechanism, make health stop device can realize great exhibition ratio to reduce the volume effectively, be convenient for transport between space station cabin door.

Simultaneously, the device is simple in structure and high in reliability.

Drawings

FIG. 1 is a schematic side view of the present application in a deployed state;

FIG. 2 is a schematic front view of FIG. 1 (not to scale, leg structure not shown);

FIG. 3 is a side view of the present application in a folded state;

FIG. 4 is a schematic front view of FIG. 3 (not to equal scale, showing the first leg arm 102 coincident with the vertical beam);

FIG. 5 is a main cross-sectional view of the joint locking mechanism in a locked state;

FIG. 6 is a main cross-sectional view of the joint deployment mechanism in an expanded state;

FIG. 7 is a schematic sectional view (not to scale) taken along line A-A of FIG. 6;

FIG. 8 is a main cross-sectional view of the joint deployment mechanism in a collapsed state;

FIG. 9 is a schematic structural view of the connection between the vertical beam and the base via the quick release mechanism.

In the figure:

1. a leg limiting assembly; 101. a leg limiting roller; 102. a first leg support arm; 103. a second leg support arm; 104. a leg limiting bracket; 2. a foot limiting component; 201. a foot upper limit roller; 202. a foot lower limit roller; 203. a first foot support arm; 204. a second leg support arm; 205. a foot limiting bracket; 3. a joint locking mechanism; 301. a bearing; 302. a rotating shaft; 303. a tapered recess; 304. a cone cover; 305. a locking threaded sleeve; 306. a first connected rod; 307. a second connected rod; 4. a joint folding and unfolding mechanism; 401. a screw sleeve for folding and unfolding; 402. a roll shaft; 403. a support; 404. a pin shaft; 5, a quick-release mechanism; 501. a clamping seat; 502. a cam wrench; 6. erecting a beam; 7. a base.

Detailed Description

The first embodiment is as follows: the embodiment is described by combining fig. 1, and the body limiting device comprises a base 7, a vertical beam 6, a leg limiting component 1, a foot limiting component 2 and a plurality of joint locking mechanisms 3, wherein the bottom end of the vertical beam 6 is fixedly arranged on the base 7,

the spacing subassembly of shank 1 includes that first supporting component and symmetry install two spacing rollers 101 of shank in first supporting component both sides, the spacing subassembly of shank 2 includes that second supporting component and symmetry install the spacing roller of two sets of feet in second supporting component both sides, and first supporting component and second supporting component install on erecting roof beam 6 through joint locking mechanism 3 respectively, realize through joint locking mechanism 3 that the position between the spacing subassembly of shank 1 and erecting roof beam 6 and the spacing subassembly of shank 2 and erecting roof beam 6 is fixed and the angle modulation. The two leg limiting rollers 101 are horizontally arranged, and are supported at the back sides of thighs or knee joints when in use, so as to limit the movement of legs; the two groups of foot limiting rollers are respectively used for limiting the movement of the two feet. The parts of the leg limiting rollers 101, which are in contact with the legs, and the parts of the foot limiting rollers, which are in contact with the legs, are made of pressure-reducing materials.

According to the body type and other requirements of the astronaut, the relative rotation and in-place locking between the two connected components are realized through the action of the joint locking mechanism 3, and the pose of the astronaut limiting device can be adjusted. The adjusted limiting device can provide restraint and limiting auxiliary support for the lower half of the human body, wherein the leg limiting function is realized by the leg limiting assembly 1, and the two leg limiting rollers 101 are arranged at the knee joint parts of the human body; the foot limiting function is realized by the foot limiting component 2,

the vertical beam 6 is an elliptic rod with a variable cross section, the bottom end with large stress is large, the upper part with small stress is small, and the weight can be reduced on the premise of ensuring the strength. The base 7 is a stable triangular support surface made of variable section plates.

From the aspect of realizing functions, the invention can provide the restraint and the limit auxiliary support for the lower half of the human body, and meet the requirement of the astronaut for releasing both hands to move; through the spacing subassembly of the spacing subassembly 2 of foot and the spacing subassembly 1 adjustment of shank, adapt to not co-altitude crowd size demand.

From the perspective of man-machine efficacy, the parts of the body limiting device, which are contacted with the feet and the legs are made of pressure-relieving materials, and each functional component can be operated by one hand, so that the use process of astronauts is more comfortable, convenient and flexible.

From the perspective of design universalization, be provided with the joint locking mechanism 3 of commonality among the health stop device, can expand in a flexible way, realize quick on-orbit change and maintenance.

From the angle of transporting convenience, the health stop device can realize great exhibition ratio to reduce the volume effectively, be convenient for transport between the space station hatch door.

The joint locking mechanism 3 comprises a rotating shaft 302, a threaded sleeve 305 for locking and a conical cover 304, two components connected through the joint locking mechanism 3 are a first connected rod 306 and a second connected rod 307 respectively, wherein one end of the second connected rod 307 is provided with a first U-shaped through groove, one end of the first connected rod 306 is inserted in the first U-shaped through groove and is rotatably connected with the second connected rod 307 through the rotating shaft 302, the conical cover 304 and the threaded sleeve 305 for locking are sequentially sleeved on the rotating shaft 302 outside the second connected rod 307, the conical cover 304 and the rotating shaft 302 as well as the first connected rod 306 and the rotating shaft 302 are fixedly connected in the circumferential direction, the threaded sleeve 305 for locking is in threaded connection with the rotating shaft 302, the outer wall of one side of the second connected rod 307 is provided with a plurality of conical grooves 303, the plurality of conical grooves 303 are arranged along the circumferential direction of the rotating shaft 302, one side of the conical cover 304 is processed with a plurality of conical teeth, and the plurality of conical teeth and the plurality of conical grooves 303 are arranged in a one-to-one correspondence. The first connected rod 306 and the second connected rod 307 may be any pair of members connected by the joint locking mechanism 3, such as: the first support assembly and the vertical beam 6, the second support assembly and the vertical beam 6, etc. when the components in each support assembly are also connected by the joint locking mechanism 3, the first connected rod 306 and the second connected rod 307 can also be the corresponding components in the support assembly. The circumferential fixed connection mode between the first connected rod 306 and the rotating shaft 302 and between the cone cover 304 and the rotating shaft 302 can be through key connection, and the section of the rotating shaft 302 at the connection part can be designed into a rectangular structure to limit circumferential rotation, so that only axial movement can be realized. The working principle of the joint locking mechanism 3 is explained with reference to fig. 5: in the locked state, the first connected link 306 and the second connected link 307 are in a locked state, and there is no relative rotational degree of freedom between the two connected links; when the relative angle between two connected rods needs to be adjusted, the locking threaded sleeve 305 is rotated to enable the locking threaded sleeve to move towards one side away from the connected rods along the axial direction, at the moment, the tapered teeth on the tapered cover 304 are separated from the tapered groove 303, the constraint of the first connected rod 306 is released, the first connected rod 306 is rotated to a proper angle, the locking threaded sleeve 305 is rotated again, and the tapered teeth are pressed into the tapered groove 303 by the tapered cover 304, so that the locking of the relative angle between the two connected rods is realized.

A bearing 301 is installed between the rotating shaft 302 and the second connected rod 307. By such design, the rotary connection between the rotating shaft 302 and the second connected rod 307 is realized through the bearing 301, and further, the rotary connection between the first connected rod 306 and the second connected rod 307 is realized.

Rectangular through holes are respectively formed in one end of the first connected rod 306 and the center of the conical cover 304, and the cross sections of the rotating shaft 302 penetrating into the first connected rod 306 and the rotating shaft 302 penetrating into the conical cover 304 are rectangular. By such a design, circumferential fixed connection between the first connected rod 306 and the rotating shaft 302 and between the cone cover 304 and the rotating shaft 302 is facilitated, synchronous rotation between the first connected rod 306 and the rotating shaft 302 and between the cone cover 304 and the rotating shaft 302 is ensured, and axial movement of the cone cover 304 on the rotating shaft 302 is facilitated.

First supporting component includes first shank support arm 102, second shank support arm 103 and the spacing support 104 of shank, first shank support arm 102 with connect through joint locking mechanism 3 between the second shank support arm 103, second shank support arm 103 passes through joint locking mechanism 3 and is connected with erecting the roof beam 6, the spacing support 104 level of shank is adorned admittedly and is kept away from the one end of second shank support arm 103 on first shank support arm 102, correspond between the both ends of two spacing rollers 101 of shank and the spacing support 104 of shank and fold through two joint exhibition mechanisms 4 and be connected, realize the expansion and folding between spacing roller 101 of shank and the spacing support 104 of shank through joint exhibition mechanism 4.

The second supporting component comprises a first foot supporting arm 203, a second foot supporting arm 204 and a foot limiting support 205, each group of foot limiting rollers comprises a foot upper limiting roller 201 and a foot lower limiting roller 202 which are arranged in parallel, the first foot supporting arm 203 and the second foot supporting arm 204 and the foot limiting support 205 and the first foot supporting arm 203 are connected through a joint locking mechanism 3 respectively, the second foot supporting arm 204 is connected with a vertical beam 6 through the joint locking mechanism 3, the two foot upper limiting rollers 201 and the two foot lower limiting rollers 202 are connected through four joint folding and unfolding mechanisms 4 correspondingly, and the foot limiting rollers and the foot limiting support 205 are unfolded and folded through the joint folding and unfolding mechanisms 4. So design, spacing roller 201 laminating human instep on two feet, spacing roller 202 laminating human lower foot face under two feet.

The joint folding and unfolding mechanism 4 comprises a threaded sleeve 401 for folding and unfolding and a pin shaft 404, the two components connected through the joint folding and unfolding mechanism 4 are a roller shaft 402 and a support 403 respectively, one end of the support 403 is provided with a second U-shaped through groove, one end of the roller shaft 402 is inserted into the second U-shaped through groove, the roller shaft 402 is hinged with the support 403 through the pin shaft 404, the threaded sleeve 401 for folding and unfolding is simultaneously sleeved at one end part of the support 403 and one end part of the roller shaft 402, and the threaded sleeve 401 for folding and unfolding is in threaded connection with the support 403 and the roller shaft 402 respectively; a clamping groove is formed in the side wall of one end of the roller shaft 402, and when the roller shaft 402 and the bracket 403 are arranged perpendicular to each other, one end of the folding and unfolding threaded sleeve 401 is clamped in the clamping groove. By the design, the roll shaft 402 and the bracket rotate relatively through the pin shaft 404 and the second U-shaped through groove. The limiting of the roll shaft 402 and the bracket is realized through the clamping groove. The roller 402 and bracket may be any two components connected by the articulating mechanism 4, such as: leg limit rollers 101 and leg limit brackets 104, foot upper limit rollers 201 and foot limit brackets 205, foot lower limit rollers 202 and foot limit brackets 205, and the like. The working principle of the joint deployment mechanism 4 is explained with reference to fig. 6-8: in the unfolded state, the roller shaft 402 and the bracket are fixed into a whole through threads by a folding and unfolding threaded sleeve 401; when folding will be realized, the screw sleeve 401 for folding and unfolding is rotated firstly, and is made to move to one end close to the support, and the screw sleeve 401 for folding and unfolding is moved to be located between the supports completely, the roller shaft 402 is rotated by 90 degrees, and the screw sleeve 401 for folding and unfolding is rotated again at the moment, so that the screw sleeve 401 for folding and unfolding moves reversely and is matched with the clamping groove on the roller shaft 402, the roller shaft 402 and the supports are locked, and the folding between the roller shaft 402 and the supports is realized. When the folding and unfolding mechanism 4 is required to be stored or transported, the roller 402 and the bracket can rotate relatively and can be folded in place through the action of the folding and unfolding mechanism 4, so that the size is effectively reduced, and the transportation between the doors of the space stations is facilitated. The joint folding and unfolding mechanism 4 is a universal connecting structure and can realize quick on-track replacement and maintenance.

A quick-release mechanism 5 is arranged between the vertical beam 6 and the base 7, the quick-release mechanism 5 comprises a clamping seat 501 and a cam wrench 502, the clamping seat 501 is fixedly arranged on the base 7, the bottom end of the vertical beam 6 is inserted into the clamping seat 501, and the clamping seat 501 and the vertical beam 6 are clamped and fixed through the cam wrench 502. By the design, the cam wrench 502 is used for clamping and releasing the clamping seat 501, so that the vertical beam 6 can be quickly inserted and pulled out.

The first to-be-connected rod 306 and the second to-be-connected rod 307 are made of aluminum alloy, and the cone cover 304, the rotating shaft 302, and the locking threaded sleeve 305 are made of stainless steel.

The main structure parts of the two foot upper limit rollers 201 and the two foot lower limit rollers 202 are all aluminum alloy wall tubes, and the parts contacting with human bodies are made of polyurethane foam materials.

Claims

1. A body restraint device, comprising: it comprises a base (7), a vertical beam (6), a leg part limiting component (1), a foot part limiting component (2) and a plurality of joint locking mechanisms (3), wherein the bottom end of the vertical beam (6) is fixedly arranged on the base (7),

the leg limiting assembly (1) comprises two leg limiting rollers (101) which are symmetrically arranged on two sides of the first supporting assembly, the leg limiting assembly (2) comprises a second supporting assembly and two groups of leg limiting rollers which are symmetrically arranged on two sides of the second supporting assembly, the first supporting assembly and the second supporting assembly are respectively arranged on a vertical beam (6) through joint locking mechanisms (3), and the position fixing and the angle adjustment between the leg limiting assembly (1) and the vertical beam (6) and between the leg limiting assembly (2) and the vertical beam (6) are realized through the joint locking mechanisms (3).

2. A body restraint according to claim 1, wherein: the joint locking mechanism (3) comprises a rotating shaft (302), a threaded sleeve (305) for locking and a conical cover (304), two components connected through the joint locking mechanism (3) are respectively a first connected rod (306) and a second connected rod (307), wherein one end of the second connected rod (307) is provided with a first U-shaped through groove, one end of the first connected rod (306) is inserted into the first U-shaped through groove and is rotatably connected with the second connected rod (307) through the rotating shaft (302), the conical cover (304) and the threaded sleeve (305) for locking are sequentially sleeved on the rotating shaft (302) outside the second connected rod (307), the conical cover (304) and the rotating shaft (302) and the first connected rod (306) and the rotating shaft (302) are circumferentially and fixedly connected, the threaded sleeve (305) for locking is in threaded connection with the rotating shaft (302), one side of the second connected rod (307) is provided with a plurality of conical grooves (303), and the plurality of conical grooves (303) are arranged along the circumferential direction of the rotating shaft (302), a plurality of conical teeth are machined on one side of the conical cover (304) in the circumferential direction, and the plurality of conical teeth and the plurality of conical grooves (303) are arranged in a one-to-one correspondence manner.

3. A body restraint according to claim 2, wherein: a bearing (301) is arranged between the rotating shaft (302) and the second connected rod (307).

4. A body restraint according to claim 2 or 3, wherein: rectangular through holes are respectively formed in one end of the first connected rod (306) and the center of the conical cover (304), and the sections of the rotating shaft (302) penetrating into the first connected rod (306) and the rotating shaft (302) penetrating into the conical cover (304) are rectangular.

5. A body restraint according to claim 1, wherein: first supporting component includes first shank support arm (102), second shank support arm (103) and the spacing support of shank (104), first shank support arm (102) with connect through joint locking mechanism (3) between second shank support arm (103), second shank support arm (103) are connected with erecting roof beam (6) through joint locking mechanism (3), the one end of keeping away from second shank support arm (103) on first shank support arm (102) is adorned admittedly to the spacing support of shank (104) level, correspond between the both ends of two spacing rollers of shank (101) and the spacing support of shank (104) and roll out the mechanism (4) through two joints and connect, roll out the expansion and folding between spacing support of shank (101) and the spacing support of shank (104) through joint roll out the mechanism (4).

6. A body restraint according to claim 1, wherein: the second supporting assembly comprises a first foot supporting arm (203), a second foot supporting arm (204) and a foot limiting support (205), each group of foot limiting rollers comprises a foot upper limiting roller (201) and a foot lower limiting roller (202) which are arranged in parallel, the first foot supporting arm (203) is connected with the second foot supporting arm (204) and the foot limiting support (205) and the first foot supporting arm (203) through joint locking mechanisms (3), the second foot supporting arm (204) is connected with a vertical beam (6) through the joint locking mechanisms (3), the two foot upper limiting rollers (201) and the two foot lower limiting rollers (202) are connected through four joint folding mechanisms (4) correspondingly, and the foot limiting rollers and the foot limiting support (205) are unfolded and folded through the joint folding mechanisms (4).

7. A body restraint according to claim 5 or 6, wherein: the joint folding and unfolding mechanism (4) comprises a thread sleeve (401) for folding and unfolding and a pin shaft (404), two components connected through the joint folding and unfolding mechanism (4) are respectively a roller shaft (402) and a support (403), one end of the support (403) is provided with a second U-shaped through groove, one end of the roller shaft (402) is inserted into the second U-shaped through groove, the roller shaft (402) is hinged with the support (403) through the pin shaft (404), the thread sleeve (401) for folding and unfolding is simultaneously sleeved at one end part of the support (403) and one end part of the roller shaft (402), and the thread sleeve (401) for folding and unfolding is respectively in threaded connection with the support (403) and the roller shaft (402); a clamping groove is formed in the side wall of one end of the roller shaft (402), and when the roller shaft (402) and the support (403) are arranged perpendicularly to each other, one end of the folding and unfolding threaded sleeve (401) is clamped in the clamping groove.

8. A body restraint according to claim 1, 2, 3, 5 or 6, wherein: a quick-release mechanism (5) is arranged between the vertical beam (6) and the base (7), the quick-release mechanism (5) comprises a clamping seat (501) and a cam wrench (502), the clamping seat (501) is fixedly arranged on the base (7), the bottom end of the vertical beam (6) is inserted into the clamping seat (501), and the clamping seat (501) and the vertical beam (6) are clamped and fixed through the cam wrench (502).

9. A body restraint according to claim 2, wherein: the first connected rod (306) and the second connected rod (307) are both aluminum alloy pieces, and the cone cover (304), the rotating shaft (302) and the locking threaded sleeve (305) are all stainless steel pieces.

10. A body restraint according to claim 6, characterized in that: the main structure parts of the two foot upper limit rollers (201) and the two foot lower limit rollers (202) are all aluminum alloy wall tubes, and the parts contacting with human bodies are made of polyurethane foam materials.