Leg rest device for vehicle seat and vehicle seat

Abstract

The present application provides a leg support device for a car seat and a car seat, the leg support device comprises a swing mechanism, an electric drive mechanism, a telescopic mechanism and a cable mechanism; the electric drive mechanism is transmission-connected with the swing mechanism to drive the swing mechanism to swing forward and backward; the telescopic mechanism is slidably connected with the swing mechanism to telescope relative to the swing mechanism; the cable mechanism comprises a cable, one end of the cable is used to connect with the frame of the car seat to become a fixed end, the other end of the cable is connected with the telescopic mechanism to become a movable end, a certain area between the fixed end and the movable end of the cable contacts the swing mechanism, so that the telescopic mechanism can be driven to telescope through the cable when the swing mechanism swings. The leg support device has the advantages of small size, low cost and light weight.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and particularly relates to a leg rest device for an automobile seat and an automobile seat including the leg rest device. Background Art

[0002] Some automobile seats are configured with a leg rest device. The leg rest device supports the legs of the occupant, which can prevent the legs of the occupant from being fatigued, numb or sore due to long-term bending, so that the passenger can sit or lie in a more comfortable posture.

[0003] The leg rest device can realize the back-and-forth switching between the use state and the storage state through rotation and telescoping. For existing leg rest devices, generally two sets of electric drive mechanisms are configured. One electric drive mechanism is used to realize rotation, and one electric drive mechanism is used to realize telescoping. This results in the leg rest device having no advantages in terms of volume, weight and cost.

[0004] In view of this, how to improve the leg rest device to reduce the volume, weight and cost of the leg rest device is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] To solve the above problems, the present application provides a leg rest device for an automobile seat. The leg rest device includes a swing mechanism, an electric drive mechanism, a telescoping mechanism and a cable mechanism. The electric drive mechanism is in transmission connection with the swing mechanism to drive the swing mechanism to swing back and forth. The telescoping mechanism is slidably connected to the swing mechanism to telescope relative to the swing mechanism. The cable mechanism includes a cable. One end of the cable is used to be connected to the frame of the automobile seat to become a fixed end, and the other end of the cable is connected to the telescoping mechanism to become a movable end. A certain area between the fixed end and the movable end of the cable contacts the swing mechanism, so that when the swing mechanism swings, the telescoping mechanism can be driven to telescope through the cable.

[0006] An implementation manner of the leg rest device for an automobile seat. The leg rest device includes an elastic reset member. The elastic reset member is connected to the telescoping mechanism and the swing mechanism. The elastic reset member provides an elastic reset force for the telescoping mechanism to reset from the extended position to the retracted position.

[0007] An implementation manner of the leg rest device for an automobile seat. The swing mechanism includes two swing brackets arranged at intervals left and right, a lower swing cross beam and an upper swing cross beam connected between the two swing brackets. The telescoping mechanism is connected between the two swing brackets. The telescoping mechanism includes two telescoping brackets arranged at intervals left and right, an upper telescoping cross beam and a lower telescoping cross beam connected between the two telescoping brackets. The two telescoping brackets are respectively slidably connected to the two swing brackets of the swing mechanism.

[0008] An embodiment of the leg rest device of a vehicle seat, wherein the swing mechanism includes a friction member, the friction member is detachably mounted on the swing bracket, and the telescopic bracket is slidably connected to the friction member.

[0009] An embodiment of the leg rest device of a vehicle seat, wherein the upper end of the elastic reset member is connected to the upper swing cross beam, the lower end of the elastic reset member is connected to the lower telescopic cross beam, the movable end of the cable is connected to the upper telescopic cross beam, the cable contacts the lower swing cross beam, and when the swing mechanism swings backward to the limit position and the telescopic mechanism retracts to the limit position, the direction of the cable from the fixed end to the movable end is: first extend downward and forward around the lower swing cross beam, and then extend upward to the upper telescopic cross beam.

[0010] An embodiment of the leg rest device of a vehicle seat, wherein the cable mechanism includes a cable guide member, the cable guide member is connected to the lower swing cross beam, the cable is guidingly engaged with the cable guide member, the cable indirectly contacts the lower swing cross beam through the cable guide member, and when the swing mechanism swings, the distance between the cable guide member and the fixed end of the cable changes, so as to drive the telescopic mechanism to expand and contract relative to the swing mechanism.

[0011] An embodiment of the leg rest device of a vehicle seat, wherein the cable guide member is provided with a limiting portion, and when the telescopic mechanism extends to the limit position, the upper telescopic cross beam abuts against the limiting portion to limit the further extension of the telescopic mechanism.

[0012] An embodiment of the leg rest device of a vehicle seat, wherein the electric drive angle adjustment mechanism includes a motor, a transmission shaft, two angle adjusters, an angle adjuster fixing bracket and a motor fixing bracket; the motor is drivingly connected to the transmission shaft, the transmission shaft is drivingly connected to the rotatable parts of the two angle adjusters, the rotatable parts of the two angle adjusters are respectively drivingly connected to the two swing brackets, the fixed parts of the angle adjusters are fixedly mounted on the angle adjuster fixing bracket, the motor is fixedly mounted on the motor fixing bracket, and the angle adjuster fixing bracket and the motor fixing bracket are used for connecting to the skeleton of the vehicle seat.

[0013] An embodiment of the leg rest device of a vehicle seat, wherein the electric drive mechanism includes a limiting bracket, the limiting bracket is connected to the rotatable part of the angle adjuster, and when the swing mechanism swings backward to the limit position, the limiting bracket abuts against the angle adjuster fixing bracket to limit the further backward swing of the swing mechanism.

[0014] An embodiment of the leg rest device of a vehicle seat, wherein the telescopic bracket is provided with a receiving groove, one end of the telescopic bracket facing the transmission shaft is provided with an opening communicating with the receiving groove, and when the telescopic mechanism retracts to the limit position, the transmission shaft enters the receiving groove through the opening.

[0015] An embodiment of the leg rest device of the vehicle seat, the cable mechanism includes a cable fixing bracket for connecting with the frame of the vehicle seat, and the fixed end of the cable is connected with the cable fixing bracket.

[0016] In addition, the present application provides a vehicle seat, which includes the leg rest device described in any one of the above.

[0017] In the present application, the electric drive mechanism is used to drive the swing mechanism to swing. When the swing mechanism swings, the telescopic mechanism is driven to expand and contract through the cable mechanism. Therefore, a set of electric drive mechanism realizes two actions of rotation and expansion and contraction at the same time. Compared with using two sets of electric drive mechanisms, the overall volume, cost and weight of the leg rest device are reduced. Moreover, since the present application uses the cable mechanism for transmission, and the cable mechanism has the characteristics of small volume, low cost and light weight, it is more conducive to reducing the overall volume, cost and weight of the leg rest device. Description of the Drawings

[0018] Figure 1 It is a perspective view of an embodiment of the leg rest device provided by the present application;

[0019] Figure 2 is Figure 1 a perspective view of the rotation mechanism and a part of the electric drive mechanism in

[0020] Figure 3 is Figure 1 a perspective view of the telescopic mechanism in

[0021] Figure 4 is Figure 1 an exploded view of

[0022] Figure 5 It is a perspective view of an embodiment of the vehicle seat provided by the present application when the leg rest device is in the retracted state;

[0023] Figure 6 It is a perspective view of an embodiment of the vehicle seat provided by the present application when the leg rest device is in the use state.

[0024] The description of the reference numerals is as follows:

[0025] 100 Swing mechanism, 101 Swing bracket, 102 Swing upper cross beam, 103 Swing lower cross beam, 104 Friction member, 105 Friction member fixing bolt, 106 Friction member fixing nut;

[0026] 200 Telescopic mechanism, 201 Telescopic bracket, 201a Accommodating groove, 201b Opening, 202 Telescopic upper cross beam, 203 Telescopic lower cross beam, 204 Mounting bolt;

[0027] 300 Electric drive mechanism, 301 motor, 302 transmission shaft, 303 angle adjuster, 304 angle adjuster fixing bracket, 305 limit bracket, 306 motor fixing bracket, 307 motor fixing bolt, 308 gasket;

[0028] 400 Cable mechanism; 401 cable, 402 cable guide, 402a limit part, 403 cable fixing bracket, 404 guide mounting bolt;

[0029] 500 Elastic reset member;

[0030] A skeleton. Detailed implementation manner

[0031] In order to enable those skilled in the art of the present technology to better understand the technical solutions of the present application, the technical solutions of the present application will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0032] The present application provides a leg rest device for an automotive seat and an automotive seat including the leg rest device.

[0033] As Figures 1-4 shown, the leg rest device provided by the present application includes a swing mechanism 100, an electric drive mechanism 300, a telescopic mechanism 200, and a cable mechanism 400.

[0034] The electric drive mechanism 300 is in transmission connection with the swing mechanism 100, so as to drive the swing mechanism 100 to swing back and forth. The telescopic mechanism 200 is slidably connected to the swing mechanism 100, so as to be able to telescope relative to the swing mechanism 100.

[0035] The cable mechanism 400 includes a cable 401. One end of the cable 401 is connected to the skeleton A of the automotive seat to become a fixed end. Specifically, a cable fixing bracket 403 can be provided, the fixed end of the cable 401 is connected to the cable fixing bracket 403, and the cable fixing bracket 403 is connected to the skeleton A of the automotive seat. Specifically, the cable fixing bracket 403 can be connected below the skeleton A of the automotive seat (see Figure 5 ). The other end of the cable 401 is connected to the telescopic mechanism 200 to become a movable end. A certain area between the fixed end and the movable end of the cable 401 contacts the swing mechanism 100.

[0036] Since a certain area between the fixed end and the movable end of the cable 401 contacts the swing mechanism 100, and the swing mechanism 100 can swing back and forth under the drive of the electric drive mechanism 300, the position of the contact area (hereinafter referred to as the contact area) between the swing mechanism 100 and the cable 401 will move forward or backward as the swing mechanism 100 swings back and forth.

[0037] When the position of the contact area moves forward or backward, it will cause the length of the cable 401 between the contact area, the fixed end and the movable end to change. Since the total length of the cable 401, that is, the length of the cable 401 between the fixed end and the movable end, remains unchanged, if the length of the cable 401 between the contact area and the fixed end becomes longer, the length of the cable 401 between the contact area and the movable end will become shorter. Conversely, if the length of the cable 401 between the contact area and the fixed end becomes shorter, the length of the cable 401 between the contact area and the movable end will become longer.

[0038] Since the contact area of the cable 401 contacts the swing mechanism 100, the movable end of the cable 401 is connected to the telescopic mechanism 200, and the telescopic mechanism 200 is slidably connected to the swing mechanism 100, when the length of the cable 401 between the contact area and the movable end becomes shorter or longer, it will force the telescopic mechanism 200 to slide relative to the swing mechanism 100, so that the telescopic mechanism 200 extends or retracts relative to the swing mechanism 100.

[0039] In specific applications, such as Figure 5 and Figure 6 shown, the cable fixing bracket 403 can be connected below the frame A of the vehicle seat. When the leg rest device needs to be used, the electric drive mechanism 300 is used to drive the swing mechanism 100 to swing forward. When the swing mechanism 100 swings forward, it drives the telescopic mechanism 200 to extend through the cable mechanism 400, so that the leg rest device extends to the front of the frame A of the vehicle seat to support the legs of the passenger. When the leg rest device is not in use, the electric drive mechanism 300 is used to drive the swing mechanism 100 to swing backward. When the swing mechanism 100 swings backward, it drives the telescopic mechanism 200 to retract through the cable mechanism 400, so that the leg rest device is stored below the frame A of the vehicle seat.

[0040] As can be seen from the above description, for the above-mentioned leg rest device, the electric drive mechanism 300 is used to drive the swing mechanism 100 to swing forward and backward. When the swing mechanism 100 swings forward and backward, it drives the telescopic mechanism 200 to expand and contract through the cable mechanism 400. Therefore, a set of electric drive mechanism 300 realizes two actions of rotation and telescoping at the same time. Compared with using two sets of electric drive mechanisms 300, the overall volume, cost and weight of the leg rest device are reduced. Moreover, the above-mentioned leg rest device uses the cable mechanism 400 for transmission, and the cable mechanism 400 has the characteristics of small volume, low cost and light weight, so it is more conducive to reducing the overall volume, cost and weight of the leg rest device.

[0041] In one embodiment, as Figure 1 shown, the leg rest device includes an elastic reset member 500. The elastic reset member 500 is connected to the telescopic mechanism 200 and the swing mechanism 100, and the elastic reset member 500 provides an elastic reset force for the telescopic mechanism 200 to reset from the extended state to the retracted state.

[0042] To enable the cable mechanism 400 to achieve the above-mentioned transmission purpose, it is necessary to ensure that the total length of the cable 401, that is, the length of the cable 401 between the fixed end and the movable end, remains unchanged. Therefore, the cable 401 itself has no elasticity. Since the cable 401 itself has no elasticity, if only relying on the pulling of the cable 401 to reset the telescopic mechanism 200 from the extended state to the retracted state, the recovery process is relatively slow, affecting the user experience. By providing the above-mentioned elastic reset member 500, this problem can be solved, enabling the telescopic mechanism 200 to quickly reset to the retracted state and stably stay in the retracted state.

[0043] In one embodiment, as Figure 2 shown, the swing mechanism 100 includes two swing brackets 101 arranged at intervals left and right, a lower swing cross beam 103 connected between the two swing brackets 101, and an upper swing cross beam 102. With such a design, the swing mechanism 100 is a frame structure, which not only has high strength but also is small in size and light in weight. Specifically, there are no restrictions on the connection forms between the two swing brackets 101 and the lower swing cross beam 103, and between the two swing brackets 101 and the upper swing cross beam 102. It can be an assembled connection such as a snap connection, a fastener connection, etc., or it can be integrally formed.

[0044] In one embodiment, as Figure 3 shown, the telescopic mechanism 200 includes two telescopic brackets 201 arranged at intervals left and right, an upper telescopic cross beam 202 and a lower telescopic cross beam 203 connected between the two telescopic brackets 201. With such a design, the telescopic mechanism 200 is a frame structure, which not only has high strength but also is small in size and light in weight. Specifically, there are no restrictions on the connection forms between the two telescopic brackets 201 and the lower telescopic cross beam 203, and between the two telescopic brackets 201 and the upper telescopic cross beam 202. It can be an assembled connection such as a snap connection, a fastener connection, etc., or it can be integrally formed. In the figure, the lower telescopic cross beam 203 is connected below the two telescopic brackets 201 through mounting bolts 204.

[0045] In one embodiment, the telescopic mechanism 200 is connected between the two swing brackets 101 of the swing mechanism 100. With such a design, the telescopic mechanism 200 and the swing mechanism 100 are relatively compact, which is more conducive to reducing the overall volume of the leg rest device.

[0046] Of course, the structures and the relative positional relationship between the swing mechanism 100 and the telescopic mechanism 200 are not limited to the above description, as long as it is ensured that both have a certain support strength and they can be slidably connected to each other.

[0047] In one embodiment, as Figure 4As shown, the swing mechanism 100 includes a friction member 104, and the friction member 104 is made of wear-resistant material. The friction member 104 is detachably mounted on the swing bracket 101. In the figure, the friction member 104 is fixedly connected to the swing bracket 101 through a friction member fixing bolt 105 and a friction member fixing nut 106. The telescopic bracket 201 is slidably connected to the friction member 104. With such a design, when the telescopic bracket 201 slides, it mainly frictions with the friction member 104, so that the swing bracket 101 is not easily worn. During subsequent maintenance, only the friction member 104 needs to be replaced, and the maintenance cost is low.

[0048] In one embodiment, as Figure 4 shown, the upper end of the elastic reset member 500 is connected to the upper swing cross beam 102, and the lower end of the elastic reset member 500 is connected to the lower telescopic cross beam 203. Using the upper swing cross beam 102 and the lower telescopic cross beam 203 as the installation basis of the elastic reset member 500, after installation, the elastic reset member 500 is located within the frame of the swing mechanism 100, making the elastic reset member 500 and the swing mechanism 100 more compact, which is more conducive to reducing the overall volume of the leg rest device.

[0049] In one embodiment, the movable end of the cable 401 is connected to the upper telescopic cross beam 202, and the cable 401 contacts the lower swing cross beam 103. When the swing mechanism 100 swings backward to the limit position and the telescopic mechanism 200 contracts to the limit position Figure 1 at the position shown, the direction of the cable 401 from the fixed end to the movable end is: first extend downward and forward around the lower swing cross beam 103, and then extend upward to the upper telescopic cross beam 202. With such a design, the cable 401 occupies a smaller layout space, which is more conducive to reducing the overall volume of the leg rest device, and can efficiently drive the telescopic mechanism 200 to expand and contract.

[0050] In one embodiment, the cable mechanism 400 includes a cable guide member 402, and the cable guide member 402 is connected to the lower swing cross beam 103. In the figure, the cable guide member 402 is connected to the lower swing cross beam 103 through a guide member mounting bolt 404204. The cable 401 is in guiding cooperation with the cable guide member 402, and the cable 401 indirectly contacts the lower swing cross beam 103 through the cable guide member 402. The cable guide member 402 can prevent the cable 401 from swinging left and right, enabling the cable 401 to stably play a transmission role.

[0051] Specifically, the guiding structure on the cable guide member 402 that cooperates with the cable 401 can be a guiding groove or a guiding hole, and the assembly of the guiding groove and the cable 401 is more convenient.

[0052] In one embodiment, the cable guide 402 is provided with a limiting portion 402a. When the telescopic mechanism 200 extends to the limit position, the upper telescopic cross beam 202 abuts against the limiting portion 402a to limit the further extension of the telescopic mechanism 200. With such a design, the cable guide 402 not only plays a guiding role but also a limiting role, serving multiple purposes with one component, which is more conducive to simplifying the structure.

[0053] In one embodiment, the electric drive mechanism 300 includes a motor 301, a transmission shaft 302, two angle adjusters 303, an angle adjuster fixing bracket 304, and a motor fixing bracket 306.

[0054] The fixed part of the angle adjuster 303 is fixedly installed on the angle adjuster fixing bracket 304, and the angle adjuster fixing bracket 304 is used to connect to the frame A of the vehicle seat. Specifically, the angle adjuster fixing bracket 304 can be connected to the front side of the front cross beam of the frame A of the vehicle seat (see Figure 5 ).

[0055] The motor 301 is fixedly installed on the motor fixing bracket 306. In the figure, the motor 301 is connected to the motor fixing bracket 306 through motor fixing bolts 307 and gaskets 308. The motor fixing bracket 306 is used to connect to the frame A of the vehicle seat. In the figure, the motor fixing bracket 306 is assembled on the regulator fixing bracket. Since the angle adjuster fixing bracket 304 is connected to the frame A of the vehicle seat, it is equivalent to the motor fixing bracket 306 being connected to the frame A of the vehicle seat.

[0056] The motor 301 is in transmission connection with the transmission shaft 302. The transmission shaft 302 can be a spline shaft. The transmission shaft 302 is in transmission connection with the rotatable parts of the two angle adjusters 303. The rotatable parts of the two angle adjusters 303 are respectively in transmission connection with the two swing brackets 101. The motor 301 drives the transmission shaft 302 to rotate, thereby driving the rotatable parts of the two angle adjusters 303 to rotate, thereby driving the two swing brackets 101 to rotate, and thus causing the entire swing mechanism 100 to swing. By using the two angle adjusters 303 to drive the two swing brackets 101 to swing respectively, the swinging action of the swing mechanism 100 can be ensured to be stable.

[0057] In one embodiment, the electric drive mechanism 300 includes a limit bracket 305, and the limit bracket 305 is connected to the rotatable part of the angle adjuster 303. As Figure 1 shown, when the swing mechanism 100 swings backward to the limit position, the limit bracket 305 abuts against the angle adjuster fixing bracket 304 to limit the further backward swing of the swing mechanism 100.

[0058] In one embodiment, the telescopic bracket 201 is provided with a receiving groove 201a, and an opening 201b communicating with the receiving groove 201a is provided at one end of the telescopic bracket 201 facing the transmission shaft 302. When the telescopic mechanism 200 contracts to the limit position, the transmission shaft 302 enters the receiving groove 201a through the opening 201b. In this way, the telescopic stroke of the telescopic mechanism 200 is not affected by the transmission shaft 302.

[0059] The above embodiments can be combined with each other without conflict.

[0060] In the above description, the side where the front of the vehicle is located is "front", and the side where the rear of the vehicle is located is "rear".

[0061] The above uses specific examples to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A leg rest device for an automotive seat, characterized in that, The leg support device comprises a swing mechanism (100), an electric drive mechanism (300), a telescopic mechanism (200) and a cable mechanism (400); the electric drive mechanism (300) is transmission-connected to the swing mechanism (100) to drive the swing mechanism (100) to swing forward and backward; the telescopic mechanism (200) is slidably connected to the swing mechanism (100) to telescope relative to the swing mechanism (100); the cable mechanism (400) comprises a cable (401), one end of the cable (401) is used to connect to the frame of the car seat to become a fixed end, and the other end of the cable (401) is connected to the telescopic mechanism (200) to become a movable end; a certain area between the fixed end and the movable end of the cable (401) contacts the swing mechanism (100), so that when the swing mechanism (100) swings, the telescopic mechanism (200) can be driven to telescope through the cable (401); The leg support device comprises an elastic reset member (500), the elastic reset member (500) being connected to the telescopic mechanism (200) and the swing mechanism (100), the elastic reset member (500) providing an elastic reset force for the telescopic mechanism (200) to reset from an extended position to a retracted position; The swing mechanism (100) comprises two swing brackets (101) spaced apart from each other on the left and right, and a lower swing beam (103) and an upper swing beam (102) connected between the two swing brackets (101); the telescopic mechanism (200) is connected between the two swing brackets (101); the telescopic mechanism (200) comprises two telescopic brackets (201) spaced apart from each other on the left and right, and an upper telescopic beam (202) and a lower telescopic beam (203) connected between the two telescopic brackets (201); the two telescopic brackets (201) are respectively slidably connected to the two swing brackets (101) of the swing mechanism (100); The swing mechanism (100) comprises a friction member (104), the friction member (104) being detachably mounted on the swing bracket (101), and the telescopic bracket (201) being slidably connected to the friction member (104); The upper end of the elastic return member (500) is connected to the upper swing beam (102), the lower end of the elastic return member (500) is connected to the lower telescopic beam (203), the movable end of the cable (401) is connected to the upper telescopic beam (202), the cable (401) is in contact with the lower swing beam (103), and when the swing mechanism (100) swings backward to the extreme position and the telescopic mechanism (200) retracts to the extreme position, the direction of the cable (401) from the fixed end to the movable end is: first extending downward and forward to bypass the lower swing beam (103), and then extending upward to the upper telescopic beam (202).

2. The leg rest device of the vehicle seat according to claim 1, characterized in that, The cable mechanism (400) includes a cable guide (402), the cable guide (402) is connected to the lower swing cross beam (103), the cable (401) is in guiding cooperation with the cable guide (402), the cable (401) indirectly contacts the lower swing cross beam (103) through the cable guide (402), when the swing mechanism (100) swings, the distance between the cable guide (402) and the fixed end of the cable (401) changes, so as to drive the telescopic mechanism (200) to telescopically move relative to the swing mechanism (100).

3. The leg rest device of an automotive seat according to claim 2, characterized in that, The cable guide (402) is provided with a limiting part (402a), when the telescopic mechanism (200) extends to the limit position, the upper telescopic cross beam (202) abuts against the limiting part (402a) to limit the further extension of the telescopic mechanism (200).

4. The leg rest device of an automotive seat according to any one of claims 1-3, characterized in that, The electric drive mechanism (300) includes a motor (301), a transmission shaft (302), two angle adjusters (303), an angle adjuster fixing bracket (304) and a motor fixing bracket (306); the motor (301) is in transmission connection with the transmission shaft (302), the transmission shaft (302) is in transmission connection with the rotatable parts of the two angle adjusters (303), the rotatable parts of the two angle adjusters (303) are respectively in transmission connection with the two swing brackets (101), the fixed part of the angle adjuster (303) is fixedly installed on the angle adjuster fixing bracket (304), the motor (301) is fixedly installed on the motor fixing bracket (306), and the angle adjuster fixing bracket (304) and the motor fixing bracket (306) are used for connecting with the frame of the vehicle seat.

5. The leg rest device of the vehicle seat according to claim 4, characterized in that, The electric drive mechanism (300) includes a limiting bracket (305), the limiting bracket (305) is connected to the rotatable part of the angle adjuster (303), when the swing mechanism (100) swings backward to the limit position, the limiting bracket (305) abuts against the angle adjuster fixing bracket (304) to limit the further backward swing of the swing mechanism (100).

6. The leg support device of an automotive seat according to claim 4, wherein, The telescopic bracket (201) is provided with a receiving groove (201a), one end of the telescopic bracket (201) facing the transmission shaft (302) is provided with an opening (201b) communicating with the receiving groove (201a), when the telescopic mechanism (200) retracts to the limit position, the transmission shaft (302) enters the receiving groove (201a) through the opening (201b).

7. The leg rest device of an automotive seat according to any one of claims 1-3, characterized in that, The cable mechanism (400) includes a cable fixing bracket (403), the cable fixing bracket (403) is used for connecting with the frame of the vehicle seat, and the fixed end of the cable (401) is connected to the cable fixing bracket (403).

8. An automotive seat, characterized in that, Including the leg rest device according to any one of claims 1-7.

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