Automobile seat leg rest adjustment support structure
By combining the leg rest fixing bracket and the power unit, the angle and extension distance of the car seat leg rest can be adjusted, solving the problems of wrinkles and complexity in the existing design and improving comfort and adjustability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN FAWSN RES & DEV CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing car seat leg rest designs are prone to wrinkling during adjustment, affecting aesthetics and comfort. Furthermore, the adjustment structure is complex, costly, and has a limited range of adjustment, making it difficult to meet the needs of different occupants.
The system combines a leg support fixing bracket, a leg support telescopic upper plate, and a power unit. Through hinged and sliding connections, the angle and extension distance can be adjusted. Elastic fabric and fixing hooks are used to avoid wrinkles. Combined with motor and lead screw drive, the structure is simplified and the adjustability is improved.
It achieves a smooth surface on the leg rest during adjustment, avoids wrinkles, simplifies the structure, reduces manufacturing costs, expands the adjustment range, and improves riding comfort and user experience.
Smart Images
Figure CN224528509U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive seat leg support adjustment technology, specifically to an automotive seat leg support adjustment support structure. Background Technology
[0002] In existing car seat leg support structures, the front panel of the seat cushion tends to accumulate wrinkles when the leg support is opened and closed. This affects not only the seat's aesthetics but also its comfort. Furthermore, dealing with these wrinkles is a complex process, impacting the user experience. Adjustable leg support structures are typically more complex, increasing manufacturing costs. They are also more prone to mechanical failures or wear after prolonged use, increasing maintenance difficulty and costs. In addition, while leg support designs aim to accommodate different leg lengths, many existing designs may have limited adjustment ranges, failing to meet the needs of all users. Utility Model Content
[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing an adjustable support structure for car seat leg rests.
[0004] An adjustable support structure for a car seat leg rest includes: a leg rest fixing bracket and a leg rest telescopic upper plate, the leg rest fixing bracket and the leg rest telescopic upper plate being hinged together. A seat cushion foam is provided on the leg rest fixing bracket, and a leg rest foam is provided on the leg rest telescopic upper plate. Both the seat cushion foam and the leg rest foam are covered with a skin. A fixing hook is provided at the hinge point of the leg rest fixing bracket and the leg rest telescopic upper plate, and the skin is hooked to the fixing hook. An elastic fabric is also connected to the skin on the leg rest foam. A suspension point is also provided on the leg rest telescopic upper plate, and the elastic fabric is hooked to the suspension point. Fixing devices are provided on both sides of the leg rest telescopic upper plate, and the fixing devices are connected to the skin. The adjustable support structure also includes a first power device and a second power device. The fixed mounting end of the first power device is located on the leg rest fixing bracket, and the power output end of the first power device is hinged to the leg rest telescopic upper plate. The power output end of the second power device is connected to the leg rest telescopic upper plate.
[0005] Furthermore, the first power unit includes a drive unit and a linkage assembly. A fixed frame is also provided on the leg support fixing bracket. A fixed rotating shaft is provided at one end of the fixed frame near the upper extension plate of the leg support, and a fixed shaft is provided at the other end of the fixed frame. One end of the linkage assembly is hinged to the fixed rotating shaft and the fixed shaft, and the other end of the linkage assembly is hinged to the upper extension plate of the leg support. The linkage assembly is also connected to the drive end of the drive unit.
[0006] Furthermore, the linkage assembly includes a first rotating arm and a second rotating arm that are hinged together in sequence. The first rotating arm is hinged to a fixed shaft, and the end of the second rotating arm away from the first rotating arm is hinged to the upper plate of the leg support telescopic mechanism.
[0007] Furthermore, the linkage assembly also includes a third rotating arm and a fourth rotating arm that are hinged together in sequence. The third rotating arm is connected to the drive end of the drive unit. The end of the third rotating arm away from the fourth rotating arm is hinged to a fixed rotating shaft. The end of the fourth rotating arm away from the third rotating arm is hinged to the upper plate of the leg support telescopic mechanism. The second rotating arm is hinged to the third rotating arm.
[0008] Furthermore, the drive unit includes a first motor, a first lead screw, a drive link, and a U-shaped bend. The power output end of the first motor is threadedly connected to the first lead screw. One end of the first lead screw is hinged to the drive link. The other end of the drive link is connected to the U-shaped bend, and the U-shaped bend is connected to the third rotating arm.
[0009] Furthermore, the adjustable support structure also includes a lower leg support telescopic plate, which is disposed between the upper leg support telescopic plate and the linkage assembly. The lower leg support telescopic plate is slidably connected to the upper leg support telescopic plate and is hinged to the linkage assembly.
[0010] Furthermore, the suspension point is a steel wire, which is set on the extension plate of the leg support, and the elastic fabric is hung on the steel wire.
[0011] Furthermore, the fixing device is a fixing baffle, which is set on both sides of the leg support telescopic upper plate and is connected to the skin.
[0012] Furthermore, the second power device includes a second motor and a second lead screw. The second motor is mounted on the lower plate of the leg support telescopic mechanism, and the power output end of the second motor is threadedly connected to the second lead screw. The second lead screw is connected to the upper plate of the leg support telescopic mechanism.
[0013] The technical solution of this utility model has the following advantages: In the technical solution provided by this utility model, the leg support fixing bracket, the leg support telescopic upper plate, and the fixing device support and fix the leg support foam and the cover, ensuring that the cover is flat during the extension and retraction of the leg support. The first power device drives the leg support telescopic upper plate to rotate to adjust the angle, and the second power device drives the leg support telescopic upper plate to move away from the leg support fixing bracket to adjust the extension distance. At the same time, the cover is hooked to the fixing hook and connected to the elastic fabric. When the leg support is extended, the elastic fabric is in a stretched state, and the elastic fabric and the fixing hook form a tensile pair, making the leg support cover smooth and avoiding wrinkles. This structure can be applied to the front driver and passenger seats of automobiles, as well as the second or third row seats of automobiles, and the adjustment of multi-position zero-gravity seats. Attached Figure Description
[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fixing hook and seat cushion structure of this utility model; Figure 3 This is a schematic diagram of the linkage assembly, the telescopic upper plate of the leg support, and the steel wire structure of this utility model; Figure 4 This is a schematic diagram showing the positional relationship between the linkage assembly, the telescopic upper plate of the leg support, the steel wire, and the elastic fabric of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model when it is unfolded at an angle; Figure 6 This is a schematic diagram of the structure of this utility model when the angle is unfolded and the length is extended; Figure 7 This is a schematic diagram of the structural composition of the connecting rod assembly of this utility model.
[0016] Explanation of reference numerals in the attached figures: 1-Leg support fixing bracket; 2-First lead screw; 3-Drive linkage; 4-Linkage group; 5-Leg support telescopic lower plate; 6-Second lead screw; 7-Leg support telescopic upper plate; 8-Left side baffle; 9-Right side baffle; 10-Fixing hook; 11-Steel wire; 12-Elastic fabric; 13-Fixing pivot; 14-Fixing shaft; 15-First rotating arm; 16-Second rotating arm; 17-Third rotating arm; 18-Fourth rotating arm; 19-Seat cushion foam; 20-U-shaped bend. Detailed Implementation
[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0021] like Figures 1-4 The illustrated car seat leg support adjustment support structure includes: a leg support fixing bracket 1 and a leg support telescopic upper plate 7, which are hinged together. A seat cushion foam 19 is provided on the leg support fixing bracket 1, and a leg support foam is provided on the leg support telescopic upper plate 7. Both the seat cushion foam 19 and the leg support foam are covered with a skin. A fixing hook 10 is provided at the hinge point of the leg support fixing bracket 1 and the leg support telescopic upper plate 7, and the skin is hooked to the fixing hook 10. An elastic fabric 12 is also connected to the skin on the leg support foam. A suspension point is also provided on the leg support telescopic upper plate 7, and the elastic fabric 12 is hooked to the suspension point. Fixing devices are provided on both sides of the leg support telescopic upper plate 7, and the fixing devices are connected to the skin. The adjustment support structure also includes a first power device and a second power device. The fixed mounting end of the first power device is located on the leg support fixing bracket 1, and the power output end of the first power device is hinged to the leg support telescopic upper plate 7. The power output end of the second power device is connected to the leg support telescopic upper plate 7.
[0022] The aforementioned car seat leg rest adjustment support structure uses a leg rest fixing bracket 1, a leg rest telescopic upper plate 7, and a fixing device to support and fix the leg rest foam and cover, ensuring the surface of the cover remains flat during the extension and retraction of the leg rest. A first power device drives the leg rest telescopic upper plate 7 to rotate to adjust the angle, and a second power device drives the leg rest telescopic upper plate 7 to move away from the leg rest fixing bracket 1 to adjust the extension distance. At the same time, the cover is hooked to the fixing hook 10 and connected to the elastic fabric 12. When the leg rest is extended, the elastic fabric 12 is in a stretched state, and the elastic fabric 12 and the fixing hook 10 form a tensile pair, making the leg rest cover smooth and avoiding wrinkles. This structure can be applied to the front driver and passenger seats of cars, as well as the second or third row seats of cars, and the adjustment of multi-position zero-gravity seats.
[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, in this embodiment, the first power unit includes a drive unit and a linkage group 4. A fixed frame is also provided on the leg support fixing bracket 1. A fixed rotating shaft 13 is provided at one end of the fixed frame near the leg support telescopic upper plate 7, and a fixed shaft 14 is provided at the other end of the fixed frame. One end of the linkage group 4 is hinged to the fixed rotating shaft 13 and the fixed shaft 14, and the other end of the linkage group 4 is hinged to the leg support telescopic upper plate 7. The linkage group 4 is also connected to the drive end of the drive unit. The linkage group 4 includes a first rotating arm 15 and a second rotating arm 16 that are hinged together in sequence. The first rotating arm 15 is hinged to the fixed shaft 14, and the end of the second rotating arm 16 away from the first rotating arm 15 is hinged to the leg support telescopic upper plate 7. The linkage group 4 also includes a third rotating arm 17 and a fourth rotating arm 18 that are hinged together in sequence. The third rotating arm 17 is connected to the drive end of the drive unit, and the end of the third rotating arm 17 away from the fourth rotating arm 18 is connected to the fixed rotating shaft 13. The fourth rotating arm 18 is hinged at one end away from the third rotating arm 17 to the upper leg support telescopic plate 7, and the second rotating arm 16 is hinged to the third rotating arm 17. The drive unit includes a first motor, a first lead screw 2, a drive connecting rod 3, and a U-shaped bend 20. The power output end of the first motor is threadedly connected to the first lead screw 2. The first lead screw 2 is hinged to one end of the drive connecting rod 3, and the other end of the drive connecting rod 3 is connected to the U-shaped bend 20. The U-shaped bend 20 is connected to the third rotating arm 17. The adjustment support structure also includes a lower leg support telescopic plate 5, which is located between the upper leg support telescopic plate 7 and the connecting rod group 4. The lower leg support telescopic plate 5 is slidably connected to the upper leg support telescopic plate 7 and hinged to the connecting rod group 4. The principle of the first power device in the angle adjustment process is as follows: The first motor is started to drive the first lead screw 2 to move towards the drive connecting rod 3, so that the first lead screw 2 drives the drive connecting rod 3 according to the angle adjustment process. Figure 7In the state shown, rotating clockwise, since the drive link 3 is connected to the U-shaped bend 20, and the U-shaped bend 20 is connected to the third rotating arm 17, the drive link 3 rotates according to... Figure 7 When rotated clockwise in the indicated state, the third rotating arm 17 also rotates clockwise, thereby driving the first rotating arm 15 to rotate clockwise simultaneously. Correspondingly, the second rotating arm 16 and the fourth rotating arm 18 push the lower leg support extension plate 5 and the upper leg support extension plate 7 to move away from the first lead screw 2, thus realizing the angle adjustment of the leg support. In addition, the linkage group 4 is arranged in pairs, so that the U-shaped bend 20 simultaneously drives the two linkage groups 4 to adjust the angle of the leg support more smoothly.
[0024] like Figures 1-4 As shown, in this embodiment, the suspension point is steel wire 11, which is set on the leg support telescopic upper plate 7, and the elastic fabric 12 is hooked onto steel wire 11; the fixing device is a fixing baffle, which is set on both sides of the leg support telescopic upper plate 7 and is connected to the skin; when the leg support is extended and the elastic fabric 12 is in a stretched state, the elastic fabric 12 and the fixing hook 10 form a tensile pair, making the leg support skin smooth and avoiding wrinkles; the fixing baffle specifically includes a left baffle 8 and a right baffle 9, which are respectively set on both sides of the leg support telescopic upper plate 7. It is used to connect and fix the skin and leg support foam to ensure that the protective surface is flat during the extension and retraction of the leg support. When the leg support is extended, the linkage group 4 is in the fully extended state, the extension plate 7 of the leg support extends to the front end, the elastic cloth 12 is in the stretched state, and the skin at the connection between the leg support and the seat cushion is hooked on the fixed hook 10, thereby eliminating the wrinkles between the leg support and the seat cushion. During the extension and retraction of the leg support, the elastic cloth 12 and the fixed hook 10 form a tensile pair, which makes the leg support skin smooth and avoids wrinkle defects. When the leg support is extended and retracted, the left baffle 8 and the right baffle 9 move together with the mechanism.
[0025] like Figures 1-4 As shown, in this embodiment, the second power device includes a second motor and a second lead screw 6. The second motor is mounted on the lower leg support telescopic plate 5, and the power output end of the second motor is threadedly connected to the second lead screw 6. The second lead screw 6 is connected to the upper leg support telescopic plate 7. The principle of the second power device in adjusting the extension length is as follows: The second motor is started, and the second motor drives the second lead screw 6 to move away from the leg support fixed bracket 1. The second lead screw 6 is connected to the upper leg support telescopic plate 7, and the lower leg support telescopic plate 5 is slidably connected to the upper leg support telescopic plate 7. Therefore, the second lead screw 6 drives the upper leg support telescopic plate 7 to move away from the leg support fixed bracket 1 to achieve the adjustment of the extension distance.
[0026] like Figures 1-7As shown, in this embodiment, the method for adjusting and supporting the leg rest of the car seat is as follows: the first power device drives the upper plate 7 of the leg rest to rotate to achieve angle adjustment, and the second power device drives the upper plate 7 of the leg rest to move away from the fixed bracket 1 to achieve extension distance adjustment. Specifically, starting the first motor drives the first lead screw 2 to move closer to the drive link 3, causing the first lead screw 2 to drive the drive link 3 according to... Figure 7 In the state shown, rotating clockwise, since the drive link 3 is connected to the U-shaped bend 20, and the U-shaped bend 20 is connected to the third rotating arm 17, the drive link 3 rotates according to... Figure 7 When rotated clockwise in the indicated state, the third rotating arm 17 also rotates clockwise, thereby driving the first rotating arm 15 to rotate clockwise simultaneously. Correspondingly, the second rotating arm 16 and the fourth rotating arm 18 push the lower leg support telescopic plate 5 and the upper leg support telescopic plate 7 to move away from the first lead screw 2, thus realizing the angle adjustment of the leg support. The second motor is started, and the second motor drives the second lead screw 6 to move away from the leg support fixed bracket 1. The second lead screw 6 is connected to the upper leg support telescopic plate 7, and the lower leg support telescopic plate 5 is slidably connected to the upper leg support telescopic plate 7. Therefore, the second lead screw 6 drives the upper leg support telescopic plate 7 to move away from the leg support fixed bracket 1 to realize the extension distance adjustment. The manufacturing of this utility model is a seat assembly. The leg support mechanism is assembled at the lower front end of the seat cushion. First, the frame and motion components, motor and transmission linkage and other mechanisms are fixed. Then, the foam and skin are assembled. The upper end of the skin is fixed to the fixing hook 10 by the clip, and the lower end of the elastic fabric of the skin is hung on the steel wire 11 by the clip. The skin on both sides covers the left side baffle 8 and the right side baffle 9. The assembly process can be completed on the whole chair assembly line. The above-described car seat leg rest adjustment method enables four-way adjustment of the leg rest, namely, adjustment of the opening angle and the extension length. The maximum opening angle can reach 70°, and the maximum extension length can reach 50mm. During the leg rest adjustment process, the foam and the skin slide on the extension plate 7 of the leg rest, and the elastic fabric 12 extends and retracts to achieve the delivery function, avoiding defects such as pile-up wrinkles and poor appearance of the skin after it is folded up. The maximum extension length can also be extended to 80mm as needed. If the elastic fabric 12 has excessive deformation, the steel wire 11 can be replaced with an elastic torsion form to compensate for the extension and delivery of the skin. This application has a simple structure and is easy to operate. It can be applied to the front driver and passenger seats of cars, as well as the second or third row seats of cars, and multi-position zero-gravity seats for adjustment and coordination functions, providing comfort and convenience for passengers.
[0027] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. An adjustable support structure for a car seat leg rest, comprising: The leg support fixing bracket (1) and the leg support telescopic upper plate (7) are characterized in that the leg support fixing bracket (1) and the leg support telescopic upper plate (7) are hinged together, a seat cushion foam (19) is provided on the leg support fixing bracket (1), a leg support foam is provided on the leg support telescopic upper plate (7), a skin is provided on both the seat cushion foam (19) and the leg support foam, a fixing hook (10) is provided at the hinge of the leg support fixing bracket (1) and the leg support telescopic upper plate (7), the skin is hooked to the fixing hook (10), and the skin on the leg support foam is also connected to a Elastic fabric (12) and leg support telescopic upper plate (7) are also provided with suspension points. Elastic fabric (12) is hung on the suspension points. Both sides of the leg support telescopic upper plate (7) are provided with fixing devices. The fixing devices are connected to the skin. The adjustment support structure also includes a first power device and a second power device. The fixed installation end of the first power device is located on the leg support fixing bracket (1). The power output end of the first power device is hinged to the leg support telescopic upper plate (7). The power output end of the second power device is connected to the leg support telescopic upper plate (7).
2. The adjustable support structure for a car seat leg rest according to claim 1, characterized in that, The first power unit includes a drive unit and a linkage group (4). A fixed frame is also provided on the leg support fixed bracket (1). A fixed rotating shaft (13) is provided at one end of the fixed frame near the leg support telescopic upper plate (7), and a fixed shaft (14) is provided at the other end of the fixed frame. One end of the linkage group (4) is hinged to the fixed rotating shaft (13) and the fixed shaft (14), and the other end of the linkage group (4) is hinged to the leg support telescopic upper plate (7). The linkage group (4) is connected to the drive end of the drive unit.
3. The adjustable support structure for a car seat leg rest according to claim 2, characterized in that, The linkage assembly (4) includes a first rotating arm (15) and a second rotating arm (16) that are hinged together in sequence. The first rotating arm (15) is hinged to the fixed shaft (14), and the end of the second rotating arm (16) away from the first rotating arm (15) is hinged to the leg support telescopic upper plate (7).
4. The adjustable support structure for a car seat leg rest according to claim 3, characterized in that, The linkage group (4) also includes a third rotating arm (17) and a fourth rotating arm (18) that are hinged together in sequence. The third rotating arm (17) is connected to the drive end of the drive unit. The end of the third rotating arm (17) away from the fourth rotating arm (18) is hinged to the fixed rotating shaft (13). The end of the fourth rotating arm (18) away from the third rotating arm (17) is hinged to the leg support telescopic upper plate (7). The second rotating arm (16) is hinged to the third rotating arm (17).
5. The adjustable support structure for a car seat leg rest according to claim 4, characterized in that, The drive unit includes a first motor, a first lead screw (2), a drive link (3), and a U-shaped bend (20). The power output end of the first motor is threadedly connected to the first lead screw (2). The first lead screw (2) is hinged to one end of the drive link (3). The other end of the drive link (3) is connected to the U-shaped bend (20). The U-shaped bend (20) is connected to the third rotating arm (17).
6. The adjustable support structure for a car seat leg rest according to claim 2, characterized in that, The adjustable support structure also includes a lower leg support telescopic plate (5), which is located between the upper leg support telescopic plate (7) and the connecting rod group (4). The lower leg support telescopic plate (5) is slidably connected to the upper leg support telescopic plate (7) and is hinged to the connecting rod group (4).
7. The adjustable support structure for a car seat leg rest according to claim 1, characterized in that, The suspension point is a steel wire (11), which is set on the extension plate (7) of the leg support, and the elastic cloth (12) is attached to the steel wire (11).
8. The adjustable support structure for a car seat leg rest according to claim 1, characterized in that, The fixing device is a fixing baffle, which is set on both sides of the leg support telescopic upper plate (7) and is connected to the skin.
9. The adjustable support structure for a car seat leg rest according to claim 6, characterized in that, The second power device includes a second motor and a second lead screw (6). The second motor is mounted on the lower extension plate (5) of the leg support. The power output end of the second motor is threadedly connected to the second lead screw (6). The second lead screw (6) is connected to the upper extension plate (7) of the leg support.