Electric leg support

Abstract

The utility model relates to the technical field of automobile accessories, and particularly discloses an electric leg support, which comprises a leg support fixing part, a leg support fixing part and a leg support fixing part, the leg supporting plate is used for supporting legs and / or feet of a human body; one end of the multi-connecting-rod assembly is hinged to the leg support fixing piece, and the other end of the multi-connecting-rod assembly is connected with the leg supporting plate; the electric drive telescopic assembly is mounted on the multi-connecting-rod assembly; wherein the leg supporting plate has a storage state in which the leg supporting plate is kept at a position close to the leg support fixing piece when the electrically-driven telescopic assembly drives the multi-connecting-rod assembly to be folded; when the electric drive telescopic assembly drives the multi-connecting-rod assembly to be unfolded, the multi-connecting-rod assembly is in the stretching-out state and rotates in the direction away from the leg support fixing piece. According to the electric leg support provided by the utility model, the stable and convenient storage of the leg support can be realized, so that the riding experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile products, especially to an electric leg support. BACKGROUND

[0002] With the rapid development of the automobile industry and the continuous improvement of people's living quality, the design of modern automobile seats pays more and more attention to comfort and humanization. Among them, the automobile seat with a storable leg support is widely welcomed because it can provide a more comfortable riding experience. However, most of the existing automobile seat leg supports use a manual storage method, which has the following shortcomings:

[0003] ① Poor stability: During the manual storage process, the moving track and speed of the leg support are difficult to control, which can easily cause shaking and affect the stability and safety of the seat.

[0004] ② Complicated operation: The manual operation of the leg support is relatively complicated and cannot meet the needs of modern consumers for intelligent and convenient products.

[0005] Therefore, in order to solve the above problems and improve the comfort and convenience of the automobile seat, it is necessary to invent an electric storage leg support to realize stable and convenient storage of the leg support and improve the riding experience of users.

[0006] The above information disclosed in this background section is only included to enhance the understanding of the background of the present disclosure, and therefore can contain information that is not prior art known to those of ordinary skill in the art at the present time. UTILITY MODEL CONTENT

[0007] One purpose of the utility model is to provide an electric leg support that can realize stable and convenient storage of the leg support and improve the riding experience of users.

[0008] To achieve the above purpose, the utility model provides an electric leg support, which comprises:

[0009] A leg support fixing member for connecting with the seat body;

[0010] A leg support plate for supporting the legs and feet of a human body;

[0011] A multi-link assembly, one end of which is hinged to the leg support fixing member, and the other end is connected to the leg support plate;

[0012] An electric drive telescopic assembly installed on the multi-link assembly;

[0013] The leg supporting plate has a storage state of keeping close to the leg supporting fixture when the electric-driven telescopic assembly drives the multi-link assembly to fold, and has an extension state of rotating away from the leg supporting fixture when the electric-driven telescopic assembly drives the multi-link assembly to unfold.

[0014] Optionally, the multi-link assembly comprises:

[0015] The first three-joint member is provided with a first rotation shaft, a second rotation shaft and a third rotation shaft arranged in a triangle, and the leg supporting fixture is hinged to the first three-joint member through the first rotation shaft.

[0016] The first double-joint member is hinged to the first three-joint member through the second rotation shaft at one end.

[0017] The second double-joint member is hinged to the first three-joint member through the third rotation shaft, and the second double-joint member is provided with a crossbeam part for connecting to the leg supporting plate.

[0018] The second three-joint member is hinged to the other end of the first double-joint member at one end, and is hinged to the second double-joint member at a middle position.

[0019] The third double-joint member is hinged to the other end of the second three-joint member at one end, and is hinged to the leg supporting plate at the other end.

[0020] The link spring is connected to the leg supporting fixture at one end and to the second double-joint member at the other end, and is used to drive the crossbeam part to rotate downward around the third rotation shaft, so that the second three-joint member pulls the first double-joint member from both ends in cooperation with the second rotation shaft.

[0021] Optionally, the crossbeam part and the leg supporting plate are connected through a hinge assembly.

[0022] Optionally, the leg supporting fixture is provided with a thrust surface for providing support to the second double-joint member to limit the crossbeam part from continuing to rotate downward.

[0023] Optionally, the second double-joint member is provided with a resistance-reducing roller corresponding to the position of the thrust surface for abutting against the thrust surface.

[0024] Optionally, the electric-driven telescopic assembly comprises a fixed rod rotatably installed on the second three-joint member, a movable rod rotatably installed on the third double-joint member, and an electric-driven assembly for driving the movable rod to approach or move away from the fixed rod.

[0025] Optionally, the electric drive assembly comprises a gear box fixedly mounted on the fixed rod, a driving motor mounted on the gear box, and a rotating screw rod threaded through the movable rod and driven by the gear box.

[0026] Optionally, a reinforcing sleeve is arranged at the position where the movable rod is threadedly connected with the rotating screw rod.

[0027] Optionally, a bevel gear set is arranged in the gear box.

[0028] The electric leg support has the following working process:

[0029] (1) Initial state:

[0030] In the initial state, the leg supporting plate is in a storage state, i.e., close to the leg support fixing member. At this time, the multi-link assembly is in a folded state, and the electric drive telescopic assembly provides a certain pre-tightening force to ensure that the leg supporting plate is stably fixed in the storage position.

[0031] (2) Start electric telescoping:

[0032] When the user needs to use the leg support, the electric drive telescopic assembly is started by the control button or remote controller on the seat. The electric drive telescopic assembly starts to work and gradually expands.

[0033] (3) Leg supporting plate rotation:

[0034] With the expansion of the multi-link assembly, the leg supporting plate rotates away from the leg support fixing member. This process is stable and controllable, avoiding the shaking that may occur when manually storing.

[0035] (4) Reach the extended state:

[0036] When the multi-link assembly is fully expanded, the leg supporting plate reaches the extended state, providing stable support for the user's legs and / or feet.

[0037] Further, the user can stop the electric drive telescopic assembly at any time as needed, or make the electric drive telescopic assembly move in reverse, thereby adjusting the angle of the leg supporting plate to obtain a more comfortable riding experience.

[0038] (5) Return the leg support:

[0039] When the user no longer needs to use the leg support, the folding function of the electric drive telescopic assembly is started again by the control button or remote controller. The multi-link assembly gradually folds, driving the leg supporting plate to rotate towards the leg support fixing member.

[0040] (6) Return to the storage state:

[0041] Finally, the multi-link assembly is fully retracted, and the leg supporting plate returns to the storage position close to the leg supporting fixed part. The whole storage process is smooth and convenient, and does not need manual operation of the user.

[0042] Therefore, the electric leg supporting device can realize stable and convenient storage of the leg supporting device, and further improve the riding experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0044] Fig. 1 The structural schematic diagram of the electric leg supporting device in the extended state is provided for the embodiment.

[0045] Fig. 2 The exploded schematic diagram of the electric leg supporting device in the extended state is provided for the embodiment.

[0046] Fig. 3 The structural schematic diagram of the electric leg supporting device in the storage state is provided for the embodiment.

[0047] In the drawings:

[0048] 1, leg supporting fixed part; 101, thrust surface;

[0049] 2, leg supporting plate;

[0050] 3, electric drive telescopic assembly; 301, fixed rod; 302, movable rod; 3021, reinforcing sleeve; 303, electric drive assembly; 3031, gear box; 3032, drive motor; 3033, rotating screw;

[0051] 4, multi-link assembly; 401, first three-turn part; 402, first double-turn part; 403, second double-turn part; 4031, cross beam part; 404, second three-turn part; 405, third double-turn part; 406, link spring; 407, hinge assembly; 408, first rotating shaft; 409, second rotating shaft; 410, third rotating shaft; 411, resistance reducing roller. DETAILED DESCRIPTION

[0052] In the present utility model, the "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present utility model. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, and is not particularly limited in independence or association between other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0053] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by the person skilled in the art to which the present utility model belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present utility model.

[0054] In the description of the present utility model, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this paper generally represents that the associated objects before and after are a "or" logical relationship.

[0055] In the present utility model, phrases such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary or order relationship between the entities or operations.

[0056] Without more limitations, in the present utility model, "including", "containing", "having" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0057] As the same as the understanding in the "Examination Guidelines", in the present utility model, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present utility model, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise specifically limited.

[0058] In the description of the embodiments of the utility model, the space-related expressions used, such as 'center', 'longitudinal', 'transverse', 'length', 'width', 'thickness', 'upper', 'lower', 'front','rear', 'left', 'right','vertical', 'horizontal', 'perpendicular', 'top', 'bottom', 'inner', 'outer', 'clockwise', 'counterclockwise', 'axial', 'radial', 'circumferential', etc., indicate the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the utility model or for the reader to understand, and do not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model.

[0059] Unless otherwise explicitly specified or limited, in the description of the embodiments of the utility model, the terms such as'mounting', 'connection', 'connection', 'fixing','setting', etc. should be understood broadly. For example, the 'connection' can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For the skilled in the art to which the utility model belongs, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0060] Referring to Figs. 1-3 , the utility model provides a kind of electric leg support, comprising:

[0061] Leg support fixing piece 1, the leg support fixing piece 1 is used to be connected with seat body;

[0062] Leg support plate 2, the leg support plate 2 is used to support the leg and / foot of human body;

[0063] Multi-link assembly 4, one end of the multi-link assembly 4 is hinged with the leg support fixing piece 1, and the other end is connected with the leg support plate 2;

[0064] Electric drive telescopic assembly 3, the electric drive telescopic assembly 3 is installed on the multi-link assembly 4;

[0065] Wherein, the leg support plate 2 has the storage state of being kept in the position close to the leg support fixing piece 1 when the electric drive telescopic assembly 3 drives the multi-link assembly 4 to be folded;And have the extension state of rotating in the direction away from the leg support fixing piece 1 when the electric drive telescopic assembly 3 drives the multi-link assembly 4 to be unfolded.

[0066] The electric leg support provided by the embodiment, the working process is as follows:

[0067] (1) Initial state:

[0068] In the initial state, the leg support plate 2 is in the storage state, i.e., close to the leg rest fixture 1. At this time, the multi-link assembly 4 is in the folded state, and the electric drive telescopic assembly 3 provides a certain pre-tightening force to ensure that the leg support plate 2 is stably fixed in the storage position.

[0069] (2) Start the electric telescopic:

[0070] When the user needs to use the leg rest, the electric drive telescopic assembly 3 is started through the control button on the seat or the remote control, etc. The electric drive telescopic assembly 3 starts to work and drives the multi-link assembly 4 to gradually expand.

[0071] (3) Leg support plate 2 rotation:

[0072] With the expansion of the multi-link assembly 4, the leg support plate 2 rotates away from the leg rest fixture 1. This process is stable and controllable, avoiding the shaking that may occur when manually storing.

[0073] (4) Reach the extended state:

[0074] When the multi-link assembly 4 is completely expanded, the leg support plate 2 reaches the extended state, providing stable support for the user's legs and / or feet.

[0075] Further, the user can stop the electric drive telescopic assembly 3 at any time as needed, or make the electric drive telescopic assembly 3 move in the opposite direction, thereby adjusting the angle of the leg support plate 2 to obtain a more comfortable riding experience.

[0076] (5) Return the leg rest:

[0077] When the user no longer needs to use the leg rest, the folding function of the electric drive telescopic assembly 3 is started again through the control button or the remote control. The multi-link assembly 4 gradually folds, driving the leg support plate 2 to rotate towards the leg rest fixture 1.

[0078] (6) Return to the storage state:

[0079] Finally, the multi-link assembly 4 is completely folded, and the leg support plate 2 returns to the storage position close to the leg rest fixture 1. The entire storage process is stable and convenient, without the need for manual operation by the user.

[0080] Therefore, the electric leg rest provided by the utility model can realize stable and convenient storage of the leg rest, thereby improving the user's riding experience.

[0081] In this embodiment, the multi-link assembly 4 includes:

[0082] The first three-rotation piece 401 is provided with a first rotation shaft 408, a second rotation shaft 409 and a third rotation shaft 410 arranged in a triangle shape; wherein the leg support fixing piece 1 is hingedly connected with the first three-rotation piece 401 through the first rotation shaft 408;

[0083] The first double-rotation piece 402 is hingedly connected with the first three-rotation piece 401 at one end through the second rotation shaft 409;

[0084] The second double-rotation piece 403 is hingedly connected with the first three-rotation piece 401 through the third rotation shaft 410; wherein the second double-rotation piece 403 is provided with a crossbeam part 4031 for connecting with the leg support plate 2; further, the crossbeam part 4031 and the leg support plate 2 are rotationally connected through a hinge assembly 407;

[0085] The second three-rotation piece 404 is hingedly connected with the other end of the first double-rotation piece 402 at one end, and is hingedly connected with the second double-rotation piece 403 at a middle position;

[0086] The third double-rotation piece 405 is hingedly connected with the other end of the second three-rotation piece 404 at one end, and is hingedly connected with the leg support plate 2 at the other end;

[0087] The connecting rod tension spring 406 is connected with the leg support fixing piece 1 at one end, and is connected with the second double-rotation piece 403 at the other end, for driving the crossbeam part 4031 to rotate downward around the third rotation shaft 410, so that the second three-rotation piece 404 cooperates with the second rotation shaft 409 to pull the first double-rotation piece 402 from both ends.

[0088] Optionally, the leg support fixing piece 1 is provided with a thrust surface 101 for providing support to the second double-rotation piece 403, so as to limit the crossbeam part 4031 from continuously rotating downward. The second double-rotation piece 403 is provided with a resistance-reducing roller 411 corresponding to the position of the thrust surface 101, for abutting against the thrust surface 101.

[0089] In this embodiment, the electric drive telescopic assembly 3 includes a fixed rod 301 rotationally installed on the second three-rotation piece 404, a movable rod 302 rotationally installed on the third double-rotation piece 405, and an electric drive assembly 303 for driving the movable rod 302 to approach or move away from the fixed rod 301.

[0090] Optionally, the electric drive assembly 303 comprises a gear box 3031 fixedly installed on the fixed rod 301, a drive motor 3032 installed on the gear box 3031, and a rotating lead screw 3033 threaded through the movable rod 302 and driven by the gear box 3031.

[0091] Optionally, the position where the movable rod 302 is threaded with the rotating lead screw 3033 is provided with a reinforcing sleeve 3021 to improve the structural strength of the threaded position and avoid the threaded hole from causing low structural strength and being easily damaged.

[0092] Optionally, the gear box 3031 is provided with a bevel gear set to realize the vertical arrangement of the rotating lead screw 3033 and the drive motor 3032, thereby improving the overall structural compactness.

[0093] The following is the state switching process of each component of the multi-link assembly 4:

[0094] (1) Initial state (storage state):

[0095] The first three-turn piece 401 is hinged with the leg support fixed piece 1 through the first shaft 408 and remains stable without turning.

[0096] The first double-turn piece 402 is hinged with the first three-turn piece 401 and the second double-turn piece 403 and is in a folded position without obvious turning.

[0097] The second double-turn piece 403 comprises a cross beam part 4031 connected with the first double-turn piece 402, the second three-turn piece 404, and the leg support plate 2. The cross beam part 4031 abuts against the leg support fixed piece 1 without turning.

[0098] The second three-turn piece 404 is hinged with the second double-turn piece 403 and the third double-turn piece 405 and remains stable without turning.

[0099] The third double-turn piece 405 is connected with the movable rod 302 of the electric drive telescopic assembly 3 and is in a folded position without obvious turning.

[0100] (2) State switching (extension process):

[0101] The electric drive telescopic assembly 3 is started: the drive motor 3032 drives the rotating lead screw 3033 to rotate, and the movable rod 302 starts to move away from the fixed rod 301.

[0102] The third double-turn piece 405 starts to turn around the hinge point with the second three-turn piece 404 and pushes the second three-turn piece 404 as the movable rod 302 moves away.

[0103] Second three-turn piece 404: under the push of the third double-turn piece 405, it starts to rotate around its hinge point with the second double-turn piece 403, driving the second double-turn piece 403.

[0104] Second double-turn piece 403: under the driving of the second three-turn piece 404, the crossbeam part 4031 is lifted up, and at the same time, it rotates around its hinge point with the first double-turn piece 402.

[0105] First double-turn piece 402: under the driving of the second double-turn piece 403, it starts to rotate around its hinge point with the first three-turn piece 401, maintaining the linkage of the multi-link assembly 4.

[0106] First three-turn piece 401: as the base of the entire multi-link assembly 4, it remains stable and provides support for the rotation of other components.

[0107] Leg support plate 2: under the action of the hinge assembly 407, it gradually unfolds as the crossbeam part 4031 is lifted up, rotating towards the direction away from the leg support fixture 1.

[0108] (3) Extended state:

[0109] All components: reach a stable state, the multi-link assembly 4 remains rigid, providing solid support for the leg support plate 2.

[0110] (4) State switching (retraction process):

[0111] Electric drive telescopic assembly 3 starts: the drive motor 3032 reverses, driving the rotating lead screw 3033 to reverse rotation, and the movable rod 302 starts to approach the fixed rod 301.

[0112] Third double-turn piece 405: as the movable rod 302 approaches, it starts to reverse rotation around its hinge point with the second three-turn piece 404, pushing the second three-turn piece 404.

[0113] Second three-turn piece 404: under the push of the third double-turn piece 405, it starts to reverse rotation around its hinge point with the second double-turn piece 403, driving the second double-turn piece 403.

[0114] Second double-turn piece 403: under the driving of the second three-turn piece 404, the crossbeam part 4031 moves down, and at the same time, it reverses rotation around its hinge point with the first double-turn piece 402.

[0115] First double-turn piece 402: under the driving of the second double-turn piece 403, it starts to reverse rotation around its hinge point with the first three-turn piece 401, maintaining the linkage of the multi-link assembly 4.

[0116] First three-turn piece 401: continues to remain stable and provides support for the rotation of other components.

[0117] Leg support plate 2: gradually retracted with the descent of crossbeam part 4031 under the action of hinge assembly 407, close to leg support fixture 1.

[0118] (5) Return to initial state (storage state):

[0119] All components: return to initial position, leg support plate 2 close to leg support fixture 1, multi-link assembly 4 components remain stable, ready for next use.

[0120] During the entire state switching process, the components of multi-link assembly 4 realize the stable, convenient storage and extension of leg support plate 2 through precise linkage and cooperation, improving the user's ride experience.

[0121] In summary, the electric leg support provided by the embodiment has the following advantages:

[0122] ① Stable and convenient: realizes the stable, convenient storage and extension of leg support plate 2, avoiding shaking during manual operation.

[0123] ② Improve experience: provide comfortable leg support, significantly improve the user's ride experience.

[0124] ③ Precise linkage: precise linkage and cooperation of multi-link assembly 4 ensure the smoothness and controllability of the entire operation process.

[0125] Finally, it needs to be pointed out that although the above-mentioned embodiments have been described in the specification and drawings of the present application, it cannot limit the patent protection scope of the present application. Any equivalent structure or equivalent flow replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings, directly or indirectly, the technical solutions of the above embodiments are implemented in other related technical fields, etc., are included in the patent protection scope of the present application.

Claims

1. An electric leg rest, characterized in that, The utility model relates to a leg rest fixing piece (1) for connecting with a seat body, a leg rest plate (2) for supporting the legs and feet of a human body, a multi-link assembly (4) having one end hinged to the leg rest fixing piece (1) and the other end connected to the leg rest plate (2), and an electrically-driven telescopic assembly (3) mounted on the multi-link assembly (4). The leg rest plate (2) has a storage state of being kept close to the leg rest fixing piece (1) when the electrically-driven telescopic assembly (3) drives the multi-link assembly (4) to be retracted, and an extension state of being rotated away from the leg rest fixing piece (1) when the electrically-driven telescopic assembly (3) drives the multi-link assembly (4) to be extended. The multi-link assembly (4) comprises a first three-rotation piece (401) provided with a first rotation shaft (408), a second rotation shaft (409), and a third rotation shaft (410) arranged in a triangular shape, wherein the leg rest fixing piece (1) is hinged to the first three-rotation piece (401) through the first rotation shaft (408); a first double-rotation piece (402) having one end hinged to the first three-rotation piece (401) through the second rotation shaft (409); a second double-rotation piece (403) hinged to the first three-rotation piece (401) through the third rotation shaft (410), wherein the second double-rotation piece (403) is provided with a crossbeam (4031) for being connected to the leg rest plate (2); a second three-rotation piece (404) having one end hinged to the other end of the first double-rotation piece (402) and a middle position hinged to the second double-rotation piece (403); a third double-rotation piece (405) having one end hinged to the other end of the second three-rotation piece (404) and the other end hinged to the leg rest plate (2); and a connecting rod tension spring (406) having one end connected to the leg rest fixing piece (1) and the other end connected to the second double-rotation piece (403) for driving the crossbeam (4031) to rotate downward around the third rotation shaft (410) so that the second three-rotation piece (404) pulls the first double-rotation piece (402) from both ends in cooperation with the second rotation shaft (409). The crossbeam (4031) and the leg rest plate (2) are rotationally connected through a hinge assembly (407). The leg rest fixing piece (1) is provided with a thrust face (101) for providing support to the second double-rotation piece (403) to limit the crossbeam (4031) from continuously rotating downward. The second double-rotation piece (403) is provided with a resistance-reducing roller (411) corresponding to the position of the thrust face (101) for abutting against the thrust face (101).

2. The motorized leg rest of claim 1, wherein, ​ ​ ​ ​ ​ ​ ​ 3. The motorized leg rest of claim 2, wherein, ​ 4. The motorized leg rest of claim 2, wherein, ​ 5. The motorized leg rest of claim 4, wherein, ​ 6. The motorized leg rest of claim 2, wherein, The electric drive telescopic component (3) comprises a fixed rod (301) rotatably installed on the second three-rotation component (404), a movable rod (302) rotatably installed on the third double-rotation component (405), and an electric drive component (303) for driving the movable rod (302) to approach or move away from the fixed rod (301).

7. The motorized leg rest of claim 6, wherein, The electric drive component (303) comprises a gear box (3031) fixedly installed on the fixed rod (301), a drive motor (3032) installed on the gear box (3031), and a rotating screw rod (3033) screwed through the movable rod (302) and driven by the gear box (3031).

8. The motorized leg rest of claim 7, wherein, The position where the movable rod (302) is screwed with the rotating screw rod (3033) is provided with a reinforcing sleeve (3021).

9. The motorized leg rest of claim 7, wherein, The gear box (3031) is provided with a bevel gear set.

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