CN217751422U - Leg supporting device - Google Patents

Abstract

The application discloses a leg support device, which includes a first rod, a second rod and a telescopic rod group; the adjacent rod ends of the first rod and the second rod are hinged, and the first end of the telescopic rod group is fixedly hinged to the first rod. A rod, the second end of the telescopic rod group is hinged to the second rod; the first rod, the second rod and the telescopic rod group are assembled into a plane linkage mechanism; the telescopic rod group includes a sleeve part and a Sliding part; the sliding part is used for sliding and locking along the telescopic direction of the sleeve part. The leg support acts as a leg exoskeleton, providing support while the user squatting. When using the leg support device, the sleeve part can be freely retracted and retracted with the user's standing posture, allowing the user to squat and stand up anytime and anywhere, and the sliding part can limit the expansion and contraction range of the sleeve part, thereby adjusting the user's squat when sitting down. It can be seen that the leg support device has a memory function when the sliding part is not moving, and can provide support for different sitting posture states of the user when the sliding part is moving.

Description

A leg support device

technical field

The present application relates to the field of sitting devices, in particular to a leg support device.

Background technique

Workers in production lines such as automobile assembly need to continuously pick and place parts according to the production rhythm. During this process, users need to maintain a standing posture part or most of the time, and they also need to squat frequently during part of the time. Since the working time is as long as several hours a day, standing for a long time and squatting for too long will have adverse effects on the human body, which is not conducive to the health of workers, but also easily interferes with the quality and efficiency of work.

Although a hidden chair used as a leg exoskeleton has appeared on the market at present, which can satisfy users to sit down and stand up anytime and anywhere, however, most of these hidden chairs only have two postures, corresponding to the user's standing up and sitting position respectively. Under the circumstances, it is difficult to adapt to the various operation needs of workers beside the production line.

Utility model content

The purpose of this application is to provide a leg support device that can satisfy the user to sit down and stand up anytime and anywhere, and at the same time satisfy the user's various posture requirements.

In order to achieve the above object, the application provides a leg support device, including a first rod, a second rod and a telescopic rod group; the adjacent rod ends of the first rod and the second rod are hinged, and the first end of the telescopic rod group is fixed The shaft is hinged to the first rod, and the second end of the telescopic rod group is fixedly hinged to the second rod; the first rod, the second rod and the telescopic rod group are assembled into a planar linkage mechanism used as a leg exoskeleton; The telescopic rod set includes a sleeve part and a sliding part arranged in the sleeve part; the sliding part is used for sliding and locking along the telescopic direction of the sleeve part, so as to limit the maximum sliding range of the sleeve part.

In some embodiments, the telescopic rod set includes a telescopic air chamber and a self-sealing air hole provided in the air chamber for conducting when pressed; The case is a sliding part.

In some embodiments, the first rod is located above the second rod; the self-sealing air hole is provided on the upper part of the first rod.

In some embodiments, the telescopic rod set includes an outer tube, a rigid rod and a rigid telescopic tube; the air pressure chamber is arranged in the rigid telescopic tube; both the rigid rod and the rigid telescopic tube are passed through and slidably connected to the outer tube, and the first end of the rigid rod Distributed opposite to the first end of the rigid telescopic tube; the axial ends of the outer tube are respectively provided with a first stopper for preventing the first end of the rigid rod from being pulled out and a first stop for preventing the first end of the rigid telescopic tube from being pulled out the second stop.

In some embodiments, the rigid rod is a solid round rod; the rigid telescoping tube is a round tube; both the rigid rod and the rigid telescoping tube are equal in diameter.

In some embodiments, the rigid telescopic tube includes a first tube wall and a second tube wall distributed along the axial direction; the self-sealing air hole is provided on the second tube wall, and the outer tube is only sleeved on the first tube wall.

In some embodiments, the telescopic rod set includes an automatic push rod; the sliding part is a push rod of the automatic push rod; and the automatic push rod is a pneumatic push rod, an electric push rod or a hydraulic push rod.

In some embodiments, two sets of planar linkage mechanisms are included for respectively corresponding to the two lower limbs of the user.

In some embodiments, the first rods of the two groups of planar linkages are connected with seat boards; the seat boards and telescopic rod groups are located on opposite sides of the first rod respectively; The rod connecting plate of the rod and the intermediate plate between the two rod connecting plates; the size of any rod connecting plate along the length direction of the first rod is larger than the size of the middle plate along the length direction of the first rod.

In some embodiments, any set of planar linkage mechanisms is provided with thigh straps connected to the first bar and calf straps connected to the second bar; The torso straps are spaced in the height direction.

With respect to the above-mentioned background technology, the leg support device provided by the present application includes a first rod, a second rod and a telescopic rod group; the adjacent rod ends of the first rod and the second rod are hinged, and the first end of the telescopic rod group is fixed. The shaft is hinged to the first rod, and the second end of the telescopic rod group is fixedly hinged to the second rod; in this leg support device, the first rod, the second rod and the telescopic rod group are assembled to serve as leg Planar linkage of exoskeleton. Wherein, the telescopic rod set includes a sleeve part and a sliding part arranged in the sleeve part; the sliding part can slide and lock along the telescopic direction of the sleeve part, and is used to limit the maximum sliding range of the sleeve part.

When the leg support device provided by this application is used as the user's leg exoskeleton, the leg support device can provide support when the user squats down, allowing the user to sit down anytime and anywhere. Therefore, the leg support device can be used In daily life, it can also be used in assembly line operations to reduce the workload of the staff.

When using the above-mentioned leg support device, the casing part can freely expand and contract with the user's sitting posture, allowing the user to squat and stand up anytime and anywhere, and the sliding part can limit the expansion and contraction range of the casing part, thereby adjusting the user's squat when sitting down degree. When the sliding part is not in motion, the expansion and contraction range of the sleeve part remains unchanged, so the user has the same squat degree when sitting down for many times. This movement characteristic can be regarded as the memory function of the leg support device; when the sliding part During the action, the telescoping range of the sleeve part changes, so the user has different squat degrees when sitting down for many times. In other words, the leg support device can meet the user's different sitting posture support requirements by adjusting the sliding part.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural view of a leg support device provided by an embodiment of the present application;

FIG. 2 is a schematic structural view of a planar linkage mechanism provided by an embodiment of the present application;

Fig. 3 is a schematic structural diagram of the telescopic rod set provided by the embodiment of the present application;

Fig. 4 is a schematic structural diagram of the seat board and the straps provided by the embodiment of the present application.

Among them, 1-first rod, 2-second rod, 3-telescopic rod group, 31-outer tube, 311-first outer tube, 312-second outer tube, 32-rigid rod, 33-rigid telescopic tube, 4-seat board, 41-rod connecting board, 42-middle board, 51-thigh strap, 52-calf strap, 53-torso strap.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

Please refer to Figures 1 to 4, Figure 1 is a schematic structural view of the leg support device provided by the embodiment of the present application; Figure 2 is a schematic structural view of the planar linkage mechanism provided by the embodiment of the present application; Example of the structural schematic diagram of the telescopic rod set provided; Figure 4 is a structural schematic diagram of the seat board and straps provided by the embodiment of the present application.

With reference to Fig. 1 and Fig. 2, the present application provides a leg support device, including a first rod 1, a second rod 2 and a telescopic rod group 3; The ends of the adjacent rods are hinged, and the two ends of the telescopic rod group 3 are respectively hinged to the first rod 1 and the second rod 2. For example, the first end of the telescopic rod group 3 is hinged to the first rod 1 at a fixed axis, and the second The fixed axis of the end is hinged to the second rod 2; the first rod 1, the second rod 2 and the telescopic rod group 3 can be assembled into a planar linkage mechanism under the aforementioned connection relationship, and the planar linkage mechanism can be used as a leg outer leg. The planar link mechanism of the skeleton, in other words, the first rod 1 and the second rod 2 are respectively used to be close to the user's thigh and calf, the telescopic rod group 3 is between the thigh and the calf, and the telescopic state of the telescopic rod group 3 corresponds to the user's The bending state of the thigh and calf. Among them, the three rod bodies of the planar linkage mechanism have triangular characteristics, which can stably support the human body.

In this leg support device, the telescopic rod set 3 includes a sleeve part and a sliding part; While stretching and compressing the sleeve portion, the telescopic rod group 3 will be shortened due to the shortening of the sleeve portion; Maximum sliding range. For example, when the sliding part is at X1 _of the sleeve part along the telescopic direction, the sliding range of the sleeve part is ₀ ~X1 _; when the sliding part is at X2 of the sleeve part along the telescopic direction, the sleeve part's sliding range is The sliding range is 0 to X ₂ .

When the leg support device is worn on the back of the user's legs, the planar linkage mechanism can provide support for the user when the user squats down, maintaining the user's squatting posture. In short, the leg support device Functions as a seat when squatting.

The planar link mechanism has a sleeve part that can freely expand and contract. Taking the sliding range of the bushing part as _an example, when the user is in a standing posture and a squatting posture, the bushing part is at the two endpoints _of the range of 0~X1 respectively, that is to say, whether the user is standing Whether the posture is adjusted to a squatting posture or from a squatting posture to a standing posture, the casing part will expand and contract with the user's sitting up, ensuring that the user can stand up and sit down at any time, and the user's posture is consistent with each sitting down Same as last time. It can be seen that, on the one hand, the sleeve part can meet the user's frequent sitting needs, and on the other hand, it can play a memory function, allowing the user to squat in the same posture.

The planar link mechanism has a sliding part assembled on the sleeve part, the sliding part can limit the maximum sliding range of the sleeve part, for example, adjusting the sliding part can make the sliding range of the sleeve part change from ₀ ~X1 to ₀ ~X2 . According to the foregoing description, it can be seen that when the sleeve part is at the right end point _of the range 0-X1, the user is in a squatting posture. Similarly, when the sleeve part is at the right end point of the range ₀ -X2, the user is also squatting Posture: if the aforementioned X ₁ is smaller than the aforementioned X ₂ , the user's squat degree when the sleeve portion is at X ₂ is greater than that when the sleeve portion is at X ₁ . It can be seen that the sliding part can change the squatting degree of the user in the squatting posture, so that the user can squat in different postures.

For the above-mentioned planar linkage mechanism, the sleeve part includes at least two mutually nested pipe bodies or rod bodies. When the user sits up, the thigh and calf apply force to the two ends of the sleeve part, so that the sleeve part realizes expansion and contraction; The sliding part is installed in the casing part, and the user can manually drive the sliding part to move in the casing part, thereby changing the sliding range of the casing part, that is, the telescoping range, or the user can drive the sliding part to move in the casing part through power equipment.

In summary, the leg support device provided by this application can be used as a leg exoskeleton to provide support for the user when the user squats down, allowing the user to sit down and rest anytime and anywhere, and can be used in daily life or in the assembly line operation, reducing the workload of the staff. The leg support device is provided with a casing part and a sliding part, the casing part can freely expand and contract with the user's sitting posture, in other words, the user can stand up and sit down again at any time; the sliding part can limit the telescopic range of the casing part, in other words , the sliding part can adjust the degree of squatting when the user sits down, which can not only relieve the physical fatigue of the user maintaining the same posture for a long time, but also adapt to other action needs of the user. It can be seen that the leg support device provided by the present application can provide various sitting postures and has a memory function.

The leg support device provided by the present application will be further described below with reference to the drawings and embodiments.

In some embodiments, the telescopic rod set 3 includes a telescopic air pressure cavity, and the air pressure cavity is provided with a self-sealing air hole. When the user presses the self-sealing air hole, the self-sealing air hole changes from the sealed state to the conductive state; otherwise, when the user releases the self-sealing air hole, the self-sealing air hole changes from the conductive state to the sealed state.

When the user presses the self-sealing air hole and stretches the air pressure chamber along the expansion and contraction direction of the air pressure chamber, the outside gas continuously enters the air pressure chamber through the aforementioned self-sealing air hole, the air pressure chamber stretches and the gas volume in the air pressure chamber increases. When the user loosens the aforementioned self-sealing air hole, the self-sealing air hole is automatically closed to achieve sealing. At this time, the gas in the air pressure chamber cannot leak to the outside, and the current size of the air pressure chamber remains unchanged.

When the user presses the self-sealing air hole and compresses the air pressure chamber along the expansion and contraction direction of the air pressure chamber, the gas in the air pressure chamber is continuously discharged to the outside through the self-sealing air hole, the air pressure chamber is shortened and the gas volume in the air pressure chamber is reduced. Similarly, when the user loosens the aforementioned self-sealing air hole, the self-sealing air hole is automatically closed to achieve sealing. At this time, the gas in the air pressure chamber cannot leak to the outside, and the current size of the air pressure chamber remains unchanged.

For the above-mentioned air pressure chamber, the air pressure chamber shell surrounding the air pressure chamber and located at one end of the air pressure chamber along the expansion and contraction direction can be regarded as a sliding part. Obviously, when the air pressure chamber is elongated and shortened, the air pressure chamber shell will be displaced accordingly. That is, the elongation and shortening of the air pressure chamber corresponds to the reciprocating sliding of the sliding part within the sleeve part. Combining the above, we can see that the sliding part is used to adjust the sliding range of the sleeve part, therefore, the user can adjust the sliding range of the sleeve part by pulling and compressing the air cavity when pressing the self-sealing air hole, thereby adjusting the user's squat when squatting degree.

When the user uses the leg support device with the above structure, it is necessary to continuously press the self-sealing air hole when pulling out the air chamber and compressing the air chamber. Therefore, the self-sealing air hole can be arranged on the upper part of the leg support device, for example, In the leg supporting device, the first rod 1 is located above the second rod 2 , and the self-sealing air hole can be arranged on the upper part of the first rod 1 . The above-mentioned setting position of the self-sealing air hole on the leg support device and its first rod 1 conforms to the user's operating habits. Easily press and release self-sealing air holes in the middle.

On the basis of the above-mentioned embodiments, with reference to Fig. 3, the telescopic rod group 3 of the leg support device may include an outer tube 31, a rigid rod 32 and a rigid telescopic tube 33; both the rigid rod 32 and the rigid telescopic tube 33 are It is pierced and slidably connected to the outer tube 31 ; the air pressure chamber is set in the rigid telescopic tube 33 . It can be seen that the outer tube 31 and the rigid rod 32 can be regarded as the sleeve part mentioned above, and one end of the rigid telescopic tube 33 can be regarded as the sliding part mentioned above.

In the above telescopic rod group 3, the first end of the rigid rod 32 and the first end of the rigid telescopic tube 33 are oppositely distributed in the outer tube 31, in other words, the first end of the rigid rod 32 is close to the rigid telescopic tube 33 and the rigid rod 32 The second end is far away from the rigid telescopic tube 33, similarly, the first end of the rigid telescopic tube 33 is close to the rigid tube and the second end of the rigid telescopic tube 33 is away from the rigid tube. The axial ends of the outer tube 31 are respectively provided with a first stopper and a second stopper; the first stopper is used to prevent the first end of the rigid rod 32 from being pulled out, and the second stopper is used to prevent the first end of the rigid rod 32 from pulling out. The first end of the rigid telescopic tube 33 is pulled out. Wherein, as shown in FIG. 3 , the outer tube 31 can be assembled by a first outer tube 311 and a second outer tube 312 that are coaxial and threaded.

When using the leg support device with the above-mentioned telescopic rod set 3, if the user does not press the self-sealing air hole during the sitting-up process, both the rigid rod 32 and the rigid telescopic tube 33 slide in the outer tube 31, but during this process Rigid telescoping poles do not change in length. When the user sits down several times successively, the rigid rod 32 and the rigid telescopic tube 33 will contact each other at the same position in the outer tube 31. Squat level Sit down.

When using the leg support device with the above-mentioned telescopic rod set 3, if the user presses the self-sealing air hole during the stand-up process, not only the rigid rod 32 and the rigid telescopic tube 33 will slide in the outer tube 31, but also the outer tube 31 will The rigid telescopic tube 33 can also be drawn through the second stopper to realize the suction of external air into the air pressure chamber in the rigid telescopic tube 33 , so that the rigid telescopic tube 33 is elongated. Subsequently, the user loosens the self-sealing air hole during the squatting process. Since the rigid telescopic tube 33 is elongated, the rigid telescopic tube 32 and the rigid telescopic tube 33 slide when the two adjacent ends of the outer tube 31 touch each other. 33 will occupy a larger space in the outer tube 31 , on the contrary, the rigid rod 32 will occupy a smaller space in the outer tube 31 , in other words, the sliding range between the rigid rod 32 and the outer tube 31 is reduced.

When using the leg support device with the above-mentioned telescopic rod set 3, if the user presses the self-sealing air hole during the squatting process, the rigid rod 32, the rigid telescopic tube 33 and the outer tube 31 will compress the rigid telescopic tube 33 when they compress each other, so that The gas in the rigid telescopic tube 33 is discharged to the outside from the airtight hole, resulting in the shortening of the rigid telescopic tube 33 and the air pressure chamber in it. Since the rigid telescopic tube 33 is shortened, when both the rigid rod 32 and the rigid telescopic tube 33 slide to the adjacent ends in the outer tube 31, the rigid telescopic tube 33 will occupy a smaller space in the outer tube 31. On the contrary, the rigid The rod 32 will occupy more space in the outer tube 31 , in other words, the sliding range of the rigid rod 32 and the outer tube 31 increases.

When the sliding range of the rigid rod 32 and the outer tube 31 is reduced, the leg support device will limit the user's squatting degree, that is to say, when the user receives the support effect of the leg support device during squatting, the user's The degree of bending of the lower limbs is relatively small, and the distance of the user's waist and hips moving down is shorter than that of the standing posture. Conversely, when the sliding range between the rigid rod 32 and the outer tube 31 increases, the leg support device has less restriction on the user's squatting degree, that is to say, when the user receives the support effect of the leg support device during squatting. , the user's lower limbs are bent relatively large, and the user's waist and hips move down a long distance compared with the standing posture.

The above-mentioned rigid rod 32 is mostly a solid round rod, which can improve the structural strength and further improve the supporting effect on the user; the rigid telescopic tube 33 can be set as a round tube, which has good structural performance and is easy to expand and contract. The diameter of the aforementioned rigid rod 32 may be equal to the diameter of the rigid telescopic tube 33 , of course, the diameter of the rigid telescopic tube 33 mentioned here refers to the outer diameter of the rigid telescopic tube 33 .

In addition, the rigid telescopic tube 33 may include a first tube wall and a second tube wall distributed along the axial direction, the first tube wall and the second tube wall are nested with each other, and the expansion and contraction of the rigid telescopic tube 33 is realized based on a sliding connection relationship. In the aforementioned rigid telescopic tube 33, the self-sealing air hole is set on the second tube wall, and the outer tube 31 is only sleeved on the first tube wall. It can be seen that no matter how the outer tube 31 and the rigid telescopic tube 33 telescopically slide, the outer tube of the self-sealing air hole The hole ends are all exposed to the outside world and will not be blocked by the outer tube 31 , which is convenient for the user to operate and ensures the flow performance of the gas at the self-sealing hole.

The telescopic rod group 3 used in this application not only drives the sliding part to move in the casing part based on the air pressure principle provided above, but also drives the sliding part to move in the casing part through power equipment, thereby adjusting the sliding range of the casing part. For example, the telescopic rod set 3 of the leg support device includes an automatic push rod, and the automatic push rod may be a pneumatic push rod, may also be an electric push rod, and may also be a hydraulic push rod. Taking the automatic push rod as an example, the sliding part refers to the push rod of the pneumatic push rod, and the push rod of the pneumatic push rod moves in the sleeve part to limit the sliding range of the sleeve part.

With reference to Figure 1, generally speaking, a leg support device includes two sets of planar linkage mechanisms, which are used to respectively connect the user's two lower limbs, that is, the two sets of planar linkage mechanisms can respectively support the user's Two lower limbs. The first rods 1 of the aforementioned two groups of planar connecting mechanisms are parallel and spaced apart. When the user sits up, the two groups of planar connecting mechanisms can move synchronously to maintain the standing posture and squatting posture of the user.

Please refer to Figure 1 and Figure 4, in addition to the two sets of planar linkages, the leg support device can also include a seat 4 located on these two sets of planar linkages, and the seat 4 can be installed on these two sets of planar linkages The first rod 1 of the mechanism corresponds to the user's buttocks, in other words, when the user is in a squatting posture, the user's buttocks are placed above the seat board 4 . For any set of planar linkages, the seat plate 4 and the telescopic rod set 3 are respectively located on two opposite sides of the first rod 1 .

The seat plate 4 may include two rod connecting plates 41 and an intermediate plate 42, the two rod connecting plates 41 are attached to the two first rods 1 of the two sets of planar linkage mechanisms respectively, and the intermediate plate 42 is located between the two aforementioned two rods. Between the rod connecting plates 41. The size of the aforementioned rod connecting plate 41 along the length direction of the first rod 1 is greater than the size of the middle plate 42 along the length direction of the first rod 1. It can be seen that the shape of the seat plate 4 is similar to the letter "n", which can ensure the user's use Comfort, but also can reduce weight, user-friendly.

The leg supporting device provided in the present application is often connected to the user's lower limbs in a binding manner, for example, any set of planar linkage mechanisms is provided with multiple binding straps. Since the planar link mechanism includes the first bar 1 and the second bar 2 corresponding to the user's big and small legs respectively, the straps of the leg support device may include a thigh strap 51 and a set The calf straps 52 on the second bar 2 may also include a plurality of trunk straps 53 arranged on the upper parts of the two groups of planar linkages. These trunk straps 53 are distributed at intervals along the height direction of the user's torso. It is used to bind the waist, buttocks and other positions of the user respectively.

The leg support device provided by the present application has been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that those skilled in the art can make some improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims (10)

1. A leg support device, characterized by comprising a first rod (1), a second rod (2) and a telescopic rod group (3); the adjacent rod ends of the first rod (1) and the second rod (2) are hinged, the first end of the telescopic rod group (3) is fixedly hinged to the first rod (1), and the second end of the telescopic rod group (3) is fixedly hinged to the second rod (2); the first rod (1), the second rod (2) and the telescopic rod group (3) are assembled into a plane link mechanism used as an exoskeleton of the leg; the telescopic rod group (3) comprises a sleeve part and a sliding part arranged in the sleeve part; the sliding portion is configured to slide and lock in a telescopic direction of the sleeve portion to limit a maximum sliding range of the sleeve portion.

2. The leg support device according to claim 1, wherein the telescopic rod group (3) comprises a telescopic pneumatic cavity and a self-sealing air hole which is arranged in the pneumatic cavity and used for conducting when being pressed; the air pressure cavity shell which surrounds the air pressure cavity and is positioned at one end of the air pressure cavity along the extension direction is the sliding part.

3. Leg support according to claim 2, characterized in that the first bar (1) is located above the second bar (2); the self-sealing air hole is formed in the upper portion of the first rod (1).

4. A leg support arrangement as claimed in claim 2, characterised in that the telescopic bar set (3) comprises an outer tube (31), a rigid bar (32) and a rigid telescopic tube (33); the air pressure cavity is arranged in the rigid telescopic pipe (33); the rigid rod (32) and the rigid telescopic pipe (33) are both arranged in a penetrating way and are connected to the outer pipe (31) in a sliding way, and the first end of the rigid rod (32) and the first end of the rigid telescopic pipe (33) are distributed oppositely; and a first stop piece for preventing the first end of the rigid rod (32) from being pulled out and a second stop piece for preventing the first end of the rigid extension tube (33) from being pulled out are respectively arranged at two axial ends of the outer tube (31).

5. A leg support arrangement as claimed in claim 4, wherein the rigid rod (32) is a solid round rod; the rigid telescopic pipe (33) is a circular pipe; the rigid rod (32) and the rigid telescopic tube (33) are of equal diameter.

6. Leg support according to claim 4, wherein the rigid bellows (33) comprises a first and a second tube wall distributed in axial direction; the self-sealing air hole is formed in the second pipe wall, and the outer pipe (31) is only sleeved on the first pipe wall.

7. Leg support according to claim 1, wherein the set of telescopic rods (3) comprises an automatic pusher; the sliding part is a push rod of the automatic push rod; the automatic push rod is a pneumatic push rod, an electric push rod or a hydraulic push rod.

8. The leg support according to any one of claims 1 to 7, comprising two sets of said planar linkages for respectively corresponding to two lower limbs of the user.

9. Leg support according to claim 8, wherein a seat (4) is connected to the first rods (1) of both sets of planar linkage mechanisms; the seat plate (4) and the telescopic rod group (3) are respectively positioned on two sides of the first rod (1); the seat plate (4) comprises two rod connecting plates (41) respectively attached to the two first rods (1) and an intermediate plate (42) positioned between the two rod connecting plates (41); the dimension of any one of the rod connecting plates (41) in the length direction of the first rod (1) is larger than the dimension of the intermediate plate (42) in the length direction of the first rod (1).

10. Leg support according to claim 8, wherein any one set of said planar linkage mechanisms is provided with a thigh strap (51) connected to said first bar (1) and a calf strap (52) connected to said second bar (2); a plurality of trunk straps (53) which are distributed at intervals along the height direction of the trunk of the user are arranged between the two groups of plane link mechanisms.

Images