Leg support adjusting device, seat and vehicle

Abstract

The invention discloses a leg support adjusting device, a seat and a vehicle, and relates to the technical field of vehicle seats.In the leg support adjusting device, a rotary mounting part is movably connected to a mounting base in the front-back direction; the leg support supporting plate is rotatably connected to the rotary mounting part around the axis in the left-right direction; the driving assembly is in driving connection with the leg support supporting plate so as to drive the leg support supporting plate to rotate and move front and back. The positioning structure comprises a positioning part and a matching part which are matched with each other, the positioning part is arranged on the mounting seat, and the matching part is connected with the leg support supporting plate; wherein the positioning part can move in the front-back direction so as to keep being matched with the matching part, so that the leg support supporting plate is positioned. According to the technical scheme provided by the invention, while the leg support supporting plate is driven by the driving assembly to do linear motion, the leg support supporting plate synchronously rotates by utilizing the positioning structure, so that the extension length of the thigh support supporting plate is increased, and the technical effect of increasing the adjustable range of the thigh support supporting plate is achieved.

Description

Technical Field

[0001] This invention relates to the field of vehicle seat technology, and in particular to a leg rest adjustment device, a seat, and a vehicle. Background Technology

[0002] In a space where the seat frame assembly is already fixed, the leg support plate cannot be extended by simply lengthening the slide rail or increasing the motor stroke, otherwise it will interfere with surrounding parts or exceed the installation boundary.

[0003] Simple linear movement results in insufficient total extension length, failing to meet the leg support plate's requirements for leg support range. Summary of the Invention

[0004] The main objective of this invention is to provide a leg rest adjustment device, seat, and vehicle, which aims to improve the adjustability of the leg rest support plate to meet the user's adjustment needs.

[0005] To achieve the above objectives, the present invention provides a leg support adjustment device, comprising: a mounting base, a rotating mounting part, a leg support plate, a drive assembly, and a positioning structure; the rotating mounting part is movably connected to the mounting base in the front-to-back direction; the leg support plate is rotatably connected to the rotating mounting part about an axis in the left-to-right direction; the drive assembly is drivenly connected to the leg support plate to drive the leg support plate to rotate and move back and forth; and the positioning structure includes a positioning part and a mating part that cooperate with each other, the positioning part being disposed on the mounting base, and the mating part being connected to the leg support plate; wherein, the positioning part is movable in the front-to-back direction to maintain cooperation with the mating part, and one of the positioning part and the mating part is provided in multiples, and is arranged circumferentially along the rotation axis of the leg support plate, so that when the leg support plate is rotated to multiple angular positions, one of the positioning parts can cooperate with one of the mating parts to position the leg support plate.

[0006] In one embodiment, the leg support adjustment device further includes a positioning tooth portion and a mating tooth portion. The positioning tooth portion has a plurality of positioning teeth to correspondingly form a plurality of positioning portions, and the mating tooth portion has a plurality of mating teeth to correspondingly form the plurality of mating portions.

[0007] The positioning teeth are movably connected to the mounting base.

[0008] In one embodiment, the leg support adjustment device further includes a linkage structure, the linkage structure comprising: A first link extends in the front-rear direction, its front end being hinged to the mounting base; and... The second link is hinged at one end to the rear end of the first link; The positioning tooth is fixed at the other end of the second connecting rod.

[0009] In one embodiment, the connection structure further includes a third link: One end of the third link corresponds to the center position of the positioning tooth and is rotatably connected to the other end of the second link; The other end of the third link corresponds to the center position of the mating teeth and is rotatably connected to the rotating mounting part.

[0010] In one embodiment, the rotating mounting portion includes a connecting shaft and extends in the left-right direction; The leg support plate is rotatably connected to the connecting shaft; The connecting shaft is slidably connected to the mounting base in the front-to-back direction via a sliding connection structure.

[0011] In one embodiment, the sliding connection structure includes a limiting rod and a limiting hole disposed on the mounting base and extending in a front-rear direction. The limiting rod passes through the limiting hole and is fixedly connected to the connecting shaft.

[0012] In one embodiment, the rotating mounting portion includes a connecting shaft extending in a left-right direction, and the drive assembly includes: The worm gear and worm are meshed with each other. The worm gear extends axially in the front-to-back direction, and the center of the worm gear is provided with a threaded hole that runs through in the front-to-back direction. A threaded drive rod extends in the front-to-back direction and is threadedly connected to the threaded hole. The fourth connecting rod is hinged at one end to one end of the threaded transmission rod and at the other end to the connecting shaft; A drive motor is connected to the worm gear drive.

[0013] The present invention also proposes a seat, the seat including a leg rest adjustment device, the leg rest adjustment device including: a mounting base, a rotating mounting part, a leg rest support plate, a drive assembly, and a positioning structure; the rotating mounting part is movably connected to the mounting base in the front-to-back direction; the leg rest support plate is rotatably connected to the rotating mounting part about an axis in the left-to-right direction; the drive assembly is drivenly connected to the leg rest support plate to drive the leg rest support plate to rotate and move back and forth; and the positioning structure includes a positioning part and a mating part that cooperate with each other, the positioning part is disposed on the mounting base, and the mating part is connected to the leg rest support plate; wherein, the positioning part is movable in the front-to-back direction to maintain cooperation with the mating part, and one of the positioning part and the mating part is provided in multiple ways, and is arranged circumferentially along the rotation axis of the leg rest support plate, so that when the leg rest support plate is rotated to multiple angle positions, one of the positioning parts can cooperate with one of the mating parts to position the leg rest support plate.

[0014] In one embodiment, the seat further includes: Backrest frame; Seat adjustment mechanism with seat cushion frame; The connecting plate is fixedly connected to the seat cushion frame and rotatably connected to the backrest frame along the left-right axis. A screw extends in the left-right direction and is fixedly connected to the backrest frame; An adjustment motor, mounted on the connecting plate and driven by the screw, is used to adjust the angle between the seat cushion frame and the backrest frame.

[0015] The present invention also proposes a vehicle, which includes a seat.

[0016] The technical solution of the present invention drives the leg support plate to make linear motion by a driving component, and simultaneously makes the leg support plate rotate by a positioning structure, so as to increase the extension length of the leg support plate and achieve the technical effect of increasing the adjustable range of the leg support plate. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of an embodiment of the leg support adjustment device provided by the present invention; Figure 2 This is a schematic diagram of the leg support adjustment device in its unfolded state. Figure 3 This is a schematic diagram of the leg support adjustment device in its stowed state. Figure 4 A schematic diagram of a structural embodiment of the seat provided by the present invention; Figure 5 This is a partial structural diagram of the seat.

[0019] Explanation of icon numbers: 100. Leg support adjustment device; 1. Mounting base; 2. Rotary mounting part; 21. Connecting shaft; 3. Leg support plate; 4. Drive assembly; 41. Threaded transmission rod; 42. Fourth connecting rod; 43. Drive motor; 5. Positioning structure; 51. Positioning part; 511. Positioning teeth; 52. Mating part; 521. Mating teeth; 6. Linkage structure; 61. First connecting rod; 62. Second connecting rod; 63. Third connecting rod; 7. Sliding connection structure; 71. Limiting rod; 72. Limiting hole; 1000, Seat; 200, Seat adjustment device; 210, Seat cushion frame; 300, Connecting plate; 400, Screw; 500, Adjustment motor; 600, Backrest frame.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] The existing leg support plate only moves linearly, resulting in insufficient total extension length, which fails to meet the leg support plate's requirements for leg support range.

[0025] This invention proposes a leg support adjustment device.

[0026] Please see Figures 1 to 3In one embodiment of the present invention, the leg support adjustment device 100 includes: a mounting base 1, a rotating mounting part 2, a leg support plate 3, a drive assembly 4, and a positioning structure 5; the rotating mounting part 2 is movably connected to the mounting base 1 in the front-back direction; the leg support plate 3 is rotatably connected to the rotating mounting part 2 about an axis in the left-right direction; the drive assembly 4 is drivenly connected to the leg support plate 3 to drive the leg support plate 3 to rotate and move back and forth; and the positioning structure 5 includes a positioning part 51 and a mating part 52 that cooperate with each other, the positioning part 51 is disposed on the mounting base 1, and the mating part 52 is connected to the leg support plate 3; wherein, the positioning part 51 can move in the front-back direction to maintain cooperation with the mating part 52, and one of the positioning part 51 and the mating part 52 is provided in multiple ways and is arranged circumferentially along the rotation axis of the leg support plate 3, so that when the leg support plate 3 is rotated to multiple angle positions, a positioning part 51 can cooperate with a mating part 52 to position the leg support plate 3.

[0027] The technical solution of this invention uses a drive assembly 4 to drive the rotating mounting part 2 to move in the front-to-back direction. Since the leg support plate 3 is rotatably connected to the rotating mounting part 2 around its left-to-right axis, when the drive assembly 4 drives the rotating mounting part 2 to move in the front-to-back direction, it simultaneously drives the leg support plate 3 to move in the front-to-back direction. A positioning part 51 is mounted on the mounting base 1 and can be movably positioned relative to the mounting base 1. A mating part 52 is connected to the leg support plate 3. During the front-to-back movement of the leg support plate 3, the positioning part 51 also moves in the front-to-back direction, and the positioning part 51 and the mating part 52 always maintain a mating relationship. When the positioning part 51 is in different positions, it engages with different mating parts 52, thereby causing the leg support plate 3 to rotate along the rotation axis. This allows the leg support plate 3 to rotate during linear motion, thus achieving a larger adjustable range. This satisfies the user's support needs in different postures or provides better support for the legs of users with different body types.

[0028] Regarding the engagement between the positioning part 51 and the mating part 52: In one embodiment, the leg support adjustment device 100 further includes a positioning tooth part 511 and a mating tooth part 521. The positioning tooth part 511 has multiple positioning teeth to correspondingly form multiple positioning parts 51, and the mating tooth part 521 has multiple mating teeth to correspondingly form multiple mating parts 52. The positioning teeth are movably connected to the mounting base 1. The positioning tooth part 511 and the mating tooth part 521 are similar to two meshing gears, transmitting power through gear meshing.

[0029] Regarding how the positioning part 51 is installed on the mounting base 1, it has a travel in the front-to-back direction and rotates during the front-to-back movement, thereby driving the mating part 52 to rotate. Specifically, in one embodiment, the leg support adjustment device 100 also includes a linkage structure 6, the connection structure including: a first linkage 61 and a second linkage 62, the first linkage 61 extends in the front-to-back direction and its front end is hinged to the mounting base 1; and one end of the second linkage 62 is hinged to the rear end of the first linkage 61; a positioning tooth is fixed to the other end of the second linkage 62. The linkage mechanism allows the other end of the second linkage 62 (i.e., the position where the positioning tooth is set) to move in both the front-to-back direction and have a component of rotation in the left-to-right axis.

[0030] While the rotating mounting part 2 moves back and forth, the other end of the second connecting rod 62 (i.e., the position where the positioning teeth are set) needs to move accordingly in the back-and-forth direction, and the positioning part 51 and the mating part 52 must always maintain engagement. Therefore, the connecting structure also includes a third connecting rod 63: one end of the third connecting rod 63 corresponds to the center position of the positioning teeth 511 and is rotatably connected to the other end of the second connecting rod 62; therefore, while the rotating mounting part 2 moves back and forth, the third connecting rod 63 drives the other end of the second connecting rod 62 to move in the back-and-forth direction. In addition, the other end of the third connecting rod 63 corresponds to the center position of the mating teeth 521 and is rotatably connected to the rotating mounting part 2. Due to the constraint of the third connecting rod 63, the rotation center of the positioning teeth 511 and the rotation center of the mating teeth 521 are always kept at a distance equal to the length of the third connecting rod 63, thereby achieving constant engagement. The rotating mounting part 2 does not mean that the rotating mounting part 2 itself can rotate, but rather that the component mounted on the rotating mounting part 2 rotates relative to the rotating mounting part 2. Specifically, the rotating mounting part 2 can be configured as a connecting shaft 21 extending in the left-right direction; the leg support plate 3 is rotatably connected to the connecting shaft 21; the connecting shaft 21 is slidably connected to the mounting base 1 in the front-back direction via a sliding connection structure 7. Therefore, when the connecting shaft 21 moves in the front-back direction, it drives the second connecting rod 62 to move in the front-back direction. This causes the second connecting rod 62 to rotate, resulting in relative rotation between the positioning tooth 511 and the mating tooth 521. This, in turn, causes the leg support plate 3 to rotate.

[0031] To ensure smooth forward and backward transmission between the rotating mounting part 2 and the leg support plate 3, the sliding connection structure 7 includes a limiting rod 71 and a limiting hole 72 extending forward and backward from the mounting base 1. The limiting rod 71 passes through the limiting hole 72 and is fixedly connected to the connecting shaft 21. To maintain stability, two mounting bases 1 can be provided, corresponding to the two ends of the connecting shaft 21 respectively. Additionally, the drive assembly 4 can be positioned at the middle of the connecting shaft 21.

[0032] To enable the rotating mounting part 2 to move in the front-to-back direction, it can be achieved by an electric push rod or a lead screw drive. In one embodiment, the drive assembly 4 includes: a worm gear, a threaded transmission rod 41, a fourth connecting rod 42, and a drive motor 43. The worm gear meshes with each other, the worm gear extends axially in the front-to-back direction, and a threaded hole extending through in the front-to-back direction is provided at the center of the worm gear; the threaded transmission rod 41 extends in the front-to-back direction and is threadedly connected to the threaded hole; one end of the fourth connecting rod 42 is hinged to one end of the threaded transmission rod 41, and the other end is hinged to the connecting shaft 21; the drive motor 43 is driven by the worm gear. The drive motor 43 drives the worm gear to rotate. The threaded transmission rod 41 is threadedly connected to the threaded hole at the center of the worm gear. However, one end of the fourth connecting rod 42 is hinged to one end of the threaded transmission rod 41 (rotating axially in the left-right direction), and the other end is hinged to the connecting shaft 21 (rotating axially in the left-right direction). Due to the presence of the fourth connecting rod 42, the rotation of the threaded transmission rod 41 along the front-back axis is restricted. Therefore, the threaded transmission rod 41 moves in the front-back direction, thereby driving the connecting shaft 21 to move in the front-back direction via the fourth connecting rod 42. Furthermore, the worm gear transmission achieves smooth transmission, has a large load-bearing capacity, and can achieve self-locking, allowing the rotating mounting part 2 to maintain its adjusted position.

[0033] The present invention also proposes a seat 1000, which includes a leg support adjustment device 100. The specific structure of the leg support adjustment device 100 is as described in the above embodiments. Since the seat 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The leg support adjustment device 100 includes: a mounting base 1, a rotating mounting part 2, a leg support plate 3, a drive assembly 4, and a positioning structure 5. The rotating mounting part 2 is movably connected to the mounting base 1 in the front-to-back direction. The leg support plate 3 is rotatably connected to the rotating mounting part 2 about an axis in the left-to-right direction. The drive assembly 4 is driven to connect with the leg support plate 3 to drive the leg support plate 3 to rotate and move back and forth. The positioning structure 5 includes a positioning part 51 and a mating part 52 that cooperate with each other. The positioning part 51 is disposed on the mounting base 1, and the mating part 52 is connected to the leg support plate 3. The positioning part 51 can move in the front-to-back direction to maintain cooperation with the mating part 52. One of the positioning parts 51 and the mating part 52 is provided in multiple ways and is arranged circumferentially along the rotation axis of the leg support plate 3, so that when the leg support plate 3 is rotated to multiple angle positions, a positioning part 51 can cooperate with a mating part 52 to position the leg support plate 3.

[0034] For the seat 1000, which also includes backrest angle adjustment, please refer to [link / reference]. Figure 4 and Figure 5The seat 1000 also includes: a backrest frame 600, a seat adjustment device 200, a connecting plate 300, a screw 400, and an adjustment motor 500; the seat adjustment device 200 has a seat cushion frame 210; the connecting plate 300 is fixedly connected to the seat cushion frame 210 and rotatably connected to the backrest frame 600 along a left-right axis; the screw 400 extends in the left-right direction and is fixedly connected to the backrest frame 600; the adjustment motor 500 is mounted on the connecting plate 300 and is driven by the screw 400 to adjust the angle between the seat cushion frame 210 and the backrest frame 600. By adjusting the motor 500 to drive the screw 400 to rotate, the backrest frame 600 fixedly connected to the screw 400 is rotated, thereby adjusting the angle between the seat cushion frame 210 and the backrest frame 600.

[0035] The present invention also proposes a vehicle, the vehicle including a seat 1000, the seat 1000 including a leg support adjustment device 100. This vehicle adopts all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0036] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A leg support adjustment device, characterized in that, include: Mounting base; The rotating mounting part is movably connected to the mounting base in the front-to-back direction; The leg support plate is rotatably connected to the rotating mounting part about an axis in the left-right direction; A drive assembly, drivenly connected to the leg support plate, drives the leg support plate to rotate and move back and forth; and, The positioning structure includes a positioning part and a mating part that cooperate with each other. The positioning part is disposed on the mounting base, and the mating part is connected to the leg support plate. The positioning part is movable in the front-back direction to maintain cooperation with the mating part. One or more of the positioning part and the mating part are provided and arranged circumferentially along the rotation axis of the leg support plate, so that when the leg support plate is rotated to multiple angle positions, one of the positioning parts can cooperate with one of the mating parts to position the leg support plate.

2. The leg support adjustment device as described in claim 1, characterized in that, The leg support adjustment device further includes a positioning tooth portion and a mating tooth portion. The positioning tooth portion has multiple positioning teeth to correspondingly form multiple positioning portions, and the mating tooth portion has multiple mating teeth to correspondingly form multiple mating portions. The positioning teeth are movably connected to the mounting base.

3. The leg support adjustment device as described in claim 2, characterized in that, The leg support adjustment device further includes a linkage structure, the connection structure including: A first link extends in the front-rear direction, its front end hinged to the mounting base; and The second link is hinged at one end to the rear end of the first link; The positioning tooth is fixed at the other end of the second connecting rod.

4. The leg support adjustment device as described in claim 3, characterized in that, The connection structure also includes a third link: One end of the third link corresponds to the center position of the positioning tooth and is rotatably connected to the other end of the second link; The other end of the third link corresponds to the center position of the mating teeth and is rotatably connected to the rotating mounting part.

5. The leg support adjustment device as described in claim 1, characterized in that, The rotating mounting part includes a connecting shaft and extends in the left-right direction; The leg support plate is rotatably connected to the connecting shaft; The connecting shaft is slidably connected to the mounting base in the front-to-back direction via a sliding connection structure.

6. The leg support adjustment device as described in claim 5, characterized in that, The sliding connection structure includes a limiting rod and a limiting hole that is disposed on the mounting base and extends in the front-rear direction. The limiting rod passes through the limiting hole and is fixedly connected to the connecting shaft.

7. The leg support adjustment device as described in claim 1, characterized in that, The rotating mounting portion includes a connecting shaft extending in a left-right direction, and the drive assembly includes: The worm gear and worm are meshed with each other. The worm gear extends axially in the front-to-back direction, and the center of the worm gear is provided with a threaded hole that runs through in the front-to-back direction. A threaded drive rod extends in the front-to-back direction and is threadedly connected to the threaded hole. The fourth connecting rod is hinged at one end to one end of the threaded transmission rod and at the other end to the connecting shaft; A drive motor is connected to the worm gear drive.

8. A type of seat, characterized in that, Includes the leg support adjustment device as described in any one of claims 1 to 7.

9. The seat as claimed in claim 8, characterized in that, The seat also includes: Backrest frame; Seat adjustment mechanism with seat cushion frame; The connecting plate is fixedly connected to the seat cushion frame and rotatably connected to the backrest frame along the left-right axis. A screw extends in the left-right direction and is fixedly connected to the backrest frame; An adjustment motor, mounted on the connecting plate and driven by the screw, is used to adjust the angle between the seat cushion frame and the backrest frame.

10. A vehicle, characterized in that, Includes the seat as described in any one of claims 8 to 9.

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