Single-drive turnover extension leg support

Abstract

The utility model relates to the field of automobile parts, in particular to a single-drive turnover extension leg support which comprises a driving motor, a turnover linkage assembly, a leg support supporting seat, a leg support extension seat and an extension linkage assembly, the leg support extension seat slides on the leg support supporting seat in a limited mode, and the driving motor drives the leg support supporting seat to turn over through the turnover linkage assembly. The overturning linkage assembly comprises a first movable rod rotationally connected with the leg support supporting seat, the extending linkage assembly comprises a driving rack, a movable gear and a driven rack, the movable gear rotates on the leg support supporting seat in a limited mode, the driving rack is rotationally connected with the first movable rod, and the driving rack is always kept in meshed connection with the movable gear. The driven rack is connected with the movable gear in a meshed mode and connected with the leg support extending base, and the axial direction of the driven rack is consistent with the sliding direction of the leg support extending base. According to the utility model, the leg support structure is driven by the single motor to realize synchronous overturning and extending, so that the product cost is greatly reduced, the whole structure is simple and reliable, and the practicability is better.

Description

Technical Field

[0001] The utility model relates to the field of automobile accessories, in particular to a leg support structure of an automobile seat. Background Art

[0002] A four-way leg rest is a car seat design that allows passengers to adjust the position and angle of the leg rest in multiple directions, providing a more comfortable and personalized ride. Four-way leg rests are increasingly common in car seat design and have become a standard feature in high-end car seats. However, existing four-way leg rests rely on two motors to achieve both tilt and extension, resulting in a complex structure, occupying considerable space under the seat, and high cost.

[0003] The technical problem to be solved by this application is: how to provide a car seat leg rest with a simple structure and a flip-up and extension function. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the present invention aims to provide a single-drive flip-up and extendable leg rest.

[0005] The technical solution adopted by the present invention is: a single-driven flip-extendable leg rest, including a driving motor, a flip linkage assembly, a leg rest support seat, a leg rest extension seat and an extension linkage assembly. The leg rest extension seat slides at the upper limit of the leg rest support seat, and the driving motor drives the leg rest support seat to flip through the flip linkage assembly. The flip linkage assembly includes a movable rod rotatably connected to the leg rest support seat, and the extension linkage assembly includes an active rack, a movable gear and a driven rack. The movable gear rotates at the upper limit of the leg rest support seat, the active rack is rotatably connected to the movable rod, the active rack always maintains a meshing connection with the movable gear, the driven rack is meshingly connected to the movable gear, the driven rack is connected to the leg rest extension seat, and the axial direction of the driven rack is consistent with the sliding direction of the leg rest extension seat.

[0006] In some embodiments, the flip linkage assembly includes a fixed seat, a driving connecting rod, a supporting active rod, a supporting driven rod and two movable rods. The fixed end of the driving motor is fixedly connected to the fixed seat, and the output end is rotatably connected to the driving connecting rod. The driving connecting rod is connected to the supporting active rod. One end of the supporting active rod is rotatably connected to the fixed seat, and the other end is rotatably connected to the two movable rods. One end of the supporting driven rod is rotatably connected to the fixed seat, and the other end is rotatably connected to the movable first rod. The supporting driven rod is arranged below the supporting active rod; the other end of the movable first rod is rotatably connected to the leg rest support seat, and the other end of the movable second rod is rotatably connected to the leg rest support seat. The supporting active rod and the movable first rod are cross-arranged and rotatably connected.

[0007] In some embodiments, the leg rest support seat is provided with a fixing member and a limit buckle, the fixing member is fixedly connected to the leg rest support seat, the movable gear is limitedly rotated in the fixing member, the limit buckle is fixedly connected to the fixing member, one end of the active rack is rotationally connected to the movable rod, and the other end slides in a limited position in the limit buckle.

[0008] In some embodiments, the extension linkage assembly includes a cross-connecting link and a cross-driven link. Two groups of cross-active links, cross-connecting links and cross-driven links form a diamond-shaped telescopic structure. One end of the cross-connecting link is rotatably connected to the leg support seat, and the other end is rotatably connected to the cross-active link. One end of the cross-driven link is rotatably connected to the cross-active link, and the other end is connected to the leg support extension seat.

[0009] In some embodiments, the connection position between the two cross active links is fixedly connected to the driven gear, the connection position between the two cross connecting links is rotationally connected to the leg support seat, and the connection position between the two cross driven links is rotationally connected to the leg support extension seat.

[0010] In some embodiments, the fixed end of the drive motor is fixedly connected to the fixed seat, and the output end is connected to the drive connecting rod through a linkage. The linkage is rotatably connected to the output end of the drive motor, and the linkage is fixedly sleeved on the outer wall of the drive connecting rod.

[0011] The beneficial effects of the present invention are:

[0012] This single-drive flip-extend leg rest achieves flipping and extension functions by driving the leg rest structure with a single motor. The leg rest angle adjustment and extension adjustment are performed simultaneously, which greatly reduces product costs. In addition, the flipping and extension movements of the overall leg rest structure are more beautiful, improving the aesthetics. The overall structure is simple and reliable, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the structure of the utility model when folded;

[0015] Figure 3 This is a schematic diagram of the structure after the leg support seat is flipped over;

[0016] Figure 4 This is a schematic top view of the structure after the leg support seat is flipped over;

[0017] The numbers and names in the figure correspond to each other as follows: 1. Driving motor; 2. Flip linkage assembly; 3. Extension linkage assembly; 4. Leg rest support seat; 5. Leg rest extension seat; 11. Linkage; 21. Fixed seat; 22. Driving connecting rod; 23. Support active rod; 24. Support driven rod; 25. Movable rod 1; 26. Movable rod 2; 31. Active rack; 32. Movable gear; 33. Driven rack; 34. Cross-connecting rod; 35. Cross active connecting rod; 36. Cross driven connecting rod; 42. Limit buckle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1 The present invention provides a technical solution: a single-drive flip-extend leg rest, comprising a drive motor 1, a flip linkage assembly 2, a leg rest support base 4, and a leg rest extension base 5. The drive motor 1 drives the leg rest support base 4 and the leg rest extension base 5 to flip through the flip linkage assembly 2. The extension assembly is disposed between the push-off support base and the leg rest extension base 5. The leg rest extension base 5 slides within the leg rest support base 4 at a limit position. Slide rails are provided on both sides of the leg rest support base 4, and the leg rest extension base 5 slides within the leg rest support base 4 at a limit position along the slide rails.

[0020] See also Figure 1-Figure 3The tilt linkage assembly 2 includes a fixed base 21, a drive connecting rod 22, an active support rod 23, a driven support rod 24, a first movable rod 25, and a second movable rod 26. The fixed base 21 is fixedly connected to the seat frame. The drive motor 1 is disposed within the fixed base 21. The fixed end of the drive motor 1 is fixedly connected to the fixed base 21, and the output end is connected to the drive connecting rod 22 via a linkage 11. The linkage 11 is rotationally connected to the output end of the drive motor 1, and the linkage 11 is fixedly sleeved on the outer wall of the drive connecting rod 22. The active support rod 23, the driven support rod 24, the first movable rod 25, and the second movable rod 26 are respectively disposed on both sides of the fixed base 21. The two ends of the driving connecting rod 22 are respectively connected to the corresponding supporting active rod 23; one end of the supporting active rod 23 is rotatably connected to the fixed seat 21, and the other end is rotatably connected to the second movable rod 26; one end of the supporting driven rod 24 is rotatably connected to the fixed seat 21, and the other end is rotatably connected to the first movable rod 25; the supporting driven rod 24 is arranged below the supporting active rod 23; one end of the first movable rod 25 is rotatably connected to the supporting driven rod 24, and the other end is rotatably connected to the leg support base 4; one end of the second movable rod 26 is rotatably connected to the supporting active rod 23, and the other end is rotatably connected to the leg support base 4. The supporting active rod 23 and the first movable rod 25 are arranged in a cross-connected manner, and the cross position is the rotational position between the supporting active rod 23 and the first movable rod 25.

[0021] The driving motor 1 works, the output end of the driving motor 1 moves forward, the driving connecting rod 22 rotates, the supporting active rod 23 rotates forward, the movable rod 25 rotates forward, the supporting driven rod 24 rotates forward as the movable rod 25 moves forward, the angle between the movable rod 25 and the supporting driven rod 24 opens, the angle between the supporting active rod 23 and the movable second rod 26 opens, and the leg support seat 4 is flipped forward.

[0022] See also Figure 2 and Figure 4An extension linkage assembly 3 is provided between the flip linkage assembly 2 and the leg support seat 4 and the leg support extension seat 5. The extension linkage assembly 3 includes an active rack 31, a movable gear 32, a driven rack 33, a cross-connecting link 34, a cross active link 35 and a cross driven link 36. The movable rod 25 is rotatably connected to one end of the active rack 31, and the movable gear 32 is connected to the leg support seat 4. The leg support seat 4 is provided with a fixing part and a limit buckle 42. The fixing part is fixedly connected to the leg support seat 4, and the movable gear 32 rotates at the upper limit of the fixing part. The limit buckle 42 is fixedly connected to the fixing part. The other end of the active rack 31 is set in the limit buckle 42. When the position of the movable rod 25 changes, the limit buckle 42 ensures that the active rack 31 is still in meshing connection with the movable gear 32, the active rack 31 is limited and slides in the limit buckle 42, the driven rack 33 is connected to the bottom of the cross active link 35, the cross driven link 36 is fixedly connected to the leg support extension seat 5, the driven rack 33 is axially consistent with the sliding direction of the leg support extension seat 5, the two groups of cross active links 35, cross connecting links 34 and cross driven links 36 form a diamond telescopic structure, the leg support extension seat 5 is limited and slides on the leg support support seat 4, one end of the cross connecting link 34 is rotatably connected to the leg support support seat 4, and the other end is rotatably connected to the cross active link 35, the cross driven link 36 is rotatably connected to the cross active link 35, and the other end is rotatably connected to the leg support extension seat 5. The connection between the two cross active links 35 is fixedly connected to the driven gear, the connection between the two cross connecting links 34 is connected to the leg support support seat 4, and the connection between the two cross driven links 36 is connected to the leg support extension seat 5. When the active rack 31 moves in one direction, due to the setting of the movable gear 32, the driven rack 33 will move in the opposite direction of the active rack 31. The driven rack 33 moves, thereby changing the position of the cross active link 35, and finally realizing the sliding of the leg rest extension seat 5 on the leg rest support seat 4. Due to the connection relationship between the cross connecting link 34, the cross driven link 36 and the cross active link 35, the movement process of the leg rest extension seat 5 on the leg rest support seat 4 is smooth, meeting the frequent extension and retraction needs, and can also withstand large loads without damage, with good practicality and durability.

[0023] After the leg rest support seat 4 is flipped, the distance between the leg rest support seat 4 and the movable rod 25 increases, thereby driving the active rack 31 to drive the movable gear 32 to rotate, and the movable gear 32 drives the driven rack 33 to rotate. After the driven rack 33 moves, the position of the cross active link 35 is changed, thereby driving the movement of the cross driven link 36 and the leg rest extension seat 5.

[0024] The working principle and usage process of the utility model are as follows: the drive motor 1 is in operation, the output end of the drive motor 1 moves forward, the drive connecting rod 22 rotates, the supporting active rod 23 rotates forward, the movable first rod 25, the supporting driven rod 24, and the movable second rod 26 rotate forward, and the leg support base 4 is flipped forward. The angle of the leg support base 4 increases, the distance between the leg support base 4 and the movable first rod 25 increases, the active rack 31 transmits power to the movable gear 32, the driven rack 33 moves forward, and the leg support extension base 5 slides and extends forward on the leg support base 4, ultimately achieving the leg support flipping and extension driven by the single drive motor 1.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A single-driven flip extension leg rest, comprising a driving motor (1), a flip linkage assembly (2), a leg rest support seat (4) and a leg rest extension seat (5), wherein the leg rest extension seat (5) slides on the upper limit position of the leg rest support seat (4), and the driving motor (1) drives the leg rest support seat (4) to flip through the flip linkage assembly (2), characterized in that: The flip extension leg support also includes an extension linkage assembly (3), the flip linkage assembly (2) includes a movable rod (25) rotatably connected to the leg support support seat (4), the extension linkage assembly (3) includes an active rack (31), a movable gear (32) and a driven rack (33), the movable gear (32) rotates at the upper limit position on the leg support support seat (4), the active rack (31) is connected to the movable rod (25), the active rack (31) always remains in meshing connection with the movable gear (32), the driven rack (33) is meshing connection with the movable gear (32), the driven rack (33) is connected to the leg support extension seat (5), and the axial direction of the driven rack (33) is consistent with the sliding direction of the leg support extension seat (5).

2. The single-drive flip-up extension leg rest according to claim 1, characterized in that: The flip linkage assembly (2) comprises a fixed seat (21), a driving connecting rod (22), a supporting active rod (23), a supporting driven rod (24) and a movable second rod (26); the fixed end of the driving motor (1) is fixedly connected to the fixed seat (21), and the output end is rotatably connected to the driving connecting rod (22); the driving connecting rod (22) is connected to the supporting active rod (23); one end of the supporting active rod (23) is rotatably connected to the fixed seat (21), and the other end is rotatably connected to the movable second rod (26). Rotationally connected, one end of the support driven rod (24) is rotationally connected to the fixed seat (21), and the other end is rotationally connected to the movable rod (25). The support driven rod (24) is arranged below the support active rod (23). The other end of the movable rod (25) is rotationally connected to the leg support seat (4). The other end of the movable second rod (26) is rotationally connected to the leg support seat (4). The support active rod (23) and the movable rod (25) are cross-arranged and rotationally connected.

3. The single-drive flip-up extension leg rest according to claim 1, characterized in that: The leg support seat (4) is provided with a fixing member and a limiting buckle (42), the fixing member is fixedly connected to the leg support seat (4), the movable gear (32) is limitedly rotated on the fixing member, the limiting buckle (42) is fixedly connected to the fixing member, one end of the active rack (31) is rotationally connected to the movable rod (25), and the other end is limitedly slid in the limiting buckle (42).

4. The single-drive flip-up extension leg rest according to claim 1, characterized in that: The extension linkage assembly (3) comprises a cross-connecting link (34), a cross-active link (35) and a cross-active link (36). Two groups of the cross-active link (35), the cross-connecting link (34) and the cross-active link (36) form a diamond-shaped telescopic structure. One end of the cross-connecting link (34) is rotatably connected to the leg support seat (4) and the other end is rotatably connected to the cross-active link (35). One end of the cross-active link (36) is rotatably connected to the cross-active link (35) and the other end is connected to the leg support extension seat (5).

5. The single-drive flip-up extension leg rest according to claim 4, characterized in that: The connection position between the two cross active connecting rods (35) is fixedly connected to the driven gear, the connection position between the two cross connecting rods (34) is rotationally connected to the leg support seat (4), and the connection position between the two cross driven connecting rods (36) is rotationally connected to the leg support extension seat (5).

6. The single-drive flip-up extension leg rest according to claim 2, characterized in that: The fixed end of the drive motor (1) is fixedly connected to the fixed seat (21), and the output end is connected to the drive connecting rod (22) through a linkage member (11). The linkage member (11) is rotationally connected to the output end of the drive motor (1), and the linkage member (11) is fixedly sleeved on the outer wall of the drive connecting rod (22).

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