Leg support adjusting device and automobile seat thereof

Abstract

The leg support adjusting device comprises a left angle adjuster fixing plate and a right angle adjuster fixing plate, and the left angle adjuster fixing plate and the right angle adjuster fixing plate are fixed to the opposite sides of the lower portion of a seat framework of the automobile seat respectively. The left angle adjuster is fixed to the side face of the upper end of the left angle adjuster fixing plate, the right angle adjuster is fixed to the side face of the upper end of the right angle adjuster fixing plate, the left end of the transmission shaft is connected with the left angle adjuster, the right end of the transmission shaft is connected with the right angle adjuster, and the position, between the left angle adjuster fixing plate and the right angle adjuster fixing plate, of the transmission shaft is further connected with the transmission shaft driving mechanism. The left connecting rod mechanism is connected with the left recliner and the left side of the left recliner fixing plate, the right connecting rod mechanism is connected with the right recliner and the right side of the right recliner fixing plate, and the leg bracket is fixed between the left connecting rod mechanism and the right connecting rod mechanism; the angle adjuster is characterized in that the left angle adjuster and the right angle adjuster are concentric angle adjusters. The invention has the advantages of improving the synchronization precision, well sharing the load, reducing the stress, simplifying the structure, ensuring the stable action, conveniently reducing the energy consumption, improving the transmission efficiency, reducing the manufacturing cost and being easy to maintain.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle seats, and particularly relates to a leg rest adjusting device, and also relates to its vehicle seat. Background Art

[0002] The aforementioned leg rest, also known as a leg support, is usually configured in mid- to high-end models or vehicles that emphasize comfort. Typical but not limited examples of the aforementioned mid- to high-end models include flagship sedans (such as the Mercedes-Benz S-Class, BMW 7 Series, Audi A8, etc.), high-end MPVs (such as the Toyota Alphard / Vellfire, Buick GL8 Avenir, Mercedes-Benz V-Class, etc.), performance cars / GT sports cars (such as Porsche, BMW 8, etc.), high-energy high-end vehicles (such as Tesla, NIO ET7, Li Auto, etc.), and high-equipped family sedans (such as the Toyota Accord, Volkswagen Teramont, etc.).

[0003] Technical information on leg rest adjusting devices can be found in a large number of published Chinese patent documents. Examples include CN203557986U (Automobile seat leg rest adjusting mechanism), CN212386376U (Automobile seat leg rest adjusting mechanism), CN210011655U (An improved structure for adjusting the leg rest of an automobile), and CN111660902A (A leg rest adjusting structure for an automobile seat), etc.

[0004] Typically, such as the "seat and its leg rest adjusting device" recommended in publication number CN103209604A, it is proposed in view of the deficiencies of CN101580034A (automobile seat leg rest mechanism), CN201729085U (automobile electric seat leg rest adjusting mechanism), and CN201729089U (automobile seat leg rest adjusting mechanism) (paragraphs 0005 to 0006 of the specification). The aim is to effectively control the required layout space through the structural optimization of the transmission mechanism. The technical essence of this patent application is: "It includes an angle adjuster, the fixing part of the angle adjuster is used to connect with the fixing part of the seat, and the angle adjuster is a self-locking angle adjuster; the power input rod of the linkage mechanism is connected to the rotating output part of the angle adjuster, and the power output rod is used to connect with the leg rest to adjust the attitude of the leg rest to switch between the extended state and the retracted state." Thus, it can be seen that it is a beneficial move to transfer the self-locking angle adjuster used to adjust the angle between the backrest and the seat of an automobile seat to the extension and retraction of the leg rest. Typical examples of the aforementioned self-locking angle adjusters include CN1149157C (adjusting component for a seat with adjustable backrest inclination, especially for an automobile seat), CN100445126C (adjusting accessory for an automobile seat), WO2008 / 018650A1 (a seat tilting device), CN2907393Y (gear-type stepless seat angle adjustment structure), CN101070055A (gear-type stepless seat angle adjustment structure), and CN2479814Y (backlash elimination device). More typical is CN101941389A (seat angle adjuster and seat with this angle adjuster).

[0005] As a manufacturer of automobile seat angle adjusters, transferring the self-locking angle adjuster that can be electrically adjusted and manually adjusted and is originally used to adjust the backrest angle to the structural system of the leg rest adjusting device has the advantages of component reuse and no need to explore a new path, which can save development resources, development costs, and effectively reduce the comprehensive cost. However, there are the following deficiencies objectively when applying the self-locking angle adjuster to the structural system of the leg rest adjusting device: First, due to the tooth clearance of the self-locking angle adjuster, it is easy to have the problem of desynchronization at both ends; Second, when the self-locking angle adjuster is blocked on one side, the other side will continue to move, resulting in stress concentration on the transmission shaft (such as a spline shaft); Third, due to the large number of required components in the structural system of the self-locking angle adjuster, the structure is relatively complex, resulting in unstable operation; Fourth, due to the friction loss of each self-locking angle adjuster, the energy consumption and efficiency are relatively lacking; Fifth, the cost is high and the maintenance is complex.

[0006] Despite the fact that the self-locking angle adjuster has many deficiencies not limited to the foregoing, why is it that the market almost uniformly uses it and there is no relevant information raising substantial doubts about it? However, the applicant believes that this is precisely caused by a technical prejudice. Because whether it is the designers of automotive parts, the manufacturers of automotive seat assemblies, or even the automotive manufacturers, they are often influenced to a certain extent by the conforming habitual thinking mode and form a conservative consensus based on this influence. SUMMARY OF THE INVENTION

[0007] The object of the present invention is to provide a leg rest adjusting device that helps to significantly improve the synchronization accuracy, is conducive to sharing the load well to reduce stress, is beneficial to significantly simplify the structure and ensure stable operation, is convenient for reducing energy consumption and improving transmission efficiency, and is good at significantly reducing costs and facilitating maintenance.

[0008] Another object of the present invention is to provide an automotive seat that can fully embody the technical effects of the leg rest adjusting device.

[0009] The primary object of the present invention is achieved as follows. A leg rest adjusting device includes a left angle adjuster fixing plate and a right angle adjuster fixing plate. The left and right angle adjuster fixing plates are corresponding to each other left and right and are respectively fixed to the opposite sides under the seat frame of the automotive seat in the use state; a left angle adjuster, a right angle adjuster, a transmission shaft, and a transmission shaft driving mechanism. The left angle adjuster is fixed to the upper side surface of the left angle adjuster fixing plate, the right angle adjuster is fixed to the upper side surface of the right angle adjuster fixing plate, the left end of the transmission shaft is in transmission connection with the left angle adjuster, and the right end of the transmission shaft is in transmission connection with the right angle adjuster. Moreover, the position of the transmission shaft between the left and right angle adjuster fixing plates is also in transmission connection with the transmission shaft driving mechanism, and the transmission shaft driving mechanism is fixed to the right side of the left angle adjuster fixing plate or the left side of the right angle adjuster fixing plate; a left link mechanism, a right link mechanism, and a leg rest bracket. The left link mechanism is connected to the left angle adjuster and the left side of the left angle adjuster fixing plate, the right link mechanism is connected to the right angle adjuster and the right side of the right angle adjuster fixing plate, and the leg rest bracket is fixed between the left and right link mechanisms; characterized in that the left angle adjuster and the right angle adjuster are concentric angle adjusters.

[0010] In a specific embodiment of the present invention, the left link mechanism includes a left swing arm, a left link, a left angle adjuster fixed plate articulated link, a left swing arm link, and a left leg bracket fixed plate. The left swing arm is located on the left side of the left angle adjuster fixed plate, and the upper end of the left swing arm is fixedly connected to the left angle adjuster. The middle of the left swing arm is articulated to the middle of the left link through a first left swing arm articulated pin, and the lower end of the left swing arm is articulated to the lower end of the left swing arm link through a second left swing arm articulated pin. The upper end of the left link is articulated to the upper end of the left leg bracket fixed plate through an upper left link articulated pin, and the lower end of the left link is articulated to one end of the left angle adjuster fixed plate articulated link through a lower left link articulated pin. The other end of the left angle adjuster fixed plate articulated link is articulated to the left angle adjuster fixed plate through a left angle adjuster fixed plate articulated link pin. The upper end of the left swing arm link is articulated to the middle of the left leg bracket fixed plate through a left swing arm link articulated pin. The lower end of the left leg bracket fixed plate is configured as a left leg bracket fixed plate extension end extending downward; the right link mechanism includes a right swing arm, a right link, a right angle adjuster fixed plate articulated link, a right swing arm link, and a right leg bracket fixed plate. The right swing arm is located on the right side of the right angle adjuster fixed plate, and the upper end of the right swing arm is fixedly connected to the right angle adjuster. The middle of the right swing arm is articulated to the middle of the right link through a first right swing arm articulated pin, and the lower end of the right swing arm is articulated to the lower end of the right swing arm link through a second right swing arm articulated pin. The upper end of the right link is articulated to the upper end of the right leg bracket fixed plate through an upper right link articulated pin, and the lower end of the right link is articulated to one end of the right angle adjuster fixed plate articulated link through a lower right link articulated pin. The other end of the right angle adjuster fixed plate articulated link is articulated to the right angle adjuster fixed plate through a right angle adjuster fixed plate articulated link pin. The upper end of the right swing arm link is articulated to the middle of the right leg bracket fixed plate through a right swing arm link articulated pin. The lower end of the right leg bracket fixed plate is configured as a right leg bracket fixed plate extension end extending downward.

[0011] In another specific embodiment of the present invention, a swing arm parallel distance maintaining support member is fixed between the facing sides of the left swing arm and the right swing arm. The swing arm parallel distance maintaining support member is a hollow tubular structure or a solid rod-like structure.

[0012] In yet another specific embodiment of the present invention, the drive shaft drive mechanism includes a motor and a reduction gearbox. The motor is fixedly connected to the reduction gearbox and is in transmission cooperation with the reduction gearbox. The reduction gearbox together with the motor is fixed to the right side of the left angle adjuster fixing plate or the left side of the right angle adjuster fixing plate. A drive shaft connection hole is formed on the final power output shaft of the reduction gearbox. When the reduction gearbox together with the motor is fixed to the right side of the left angle adjuster fixing plate, the left end of the drive shaft is inserted into the drive shaft connection hole to be in transmission connection with the final power output shaft of the reduction gearbox, and the left end of the drive shaft extends to the left side of the reduction gearbox to be in transmission connection with the left angle adjuster. When the reduction gearbox together with the motor is fixed to the left side of the right angle adjuster fixing plate, the right end of the drive shaft is inserted into the drive shaft connection hole to be in transmission connection with the final power output shaft of the reduction gearbox, and the right end of the drive shaft extends to the right side of the reduction gearbox to be in transmission connection with the right angle adjuster.

[0013] In yet another specific embodiment of the present invention, the motor is a DC motor with forward and reverse functions and is electrically connected to the vehicle power supply.

[0014] In still another specific embodiment of the present invention, the left end of the leg bracket is fixed to the rear side of the left leg bracket fixing plate, and the right end of the leg bracket is fixed to the rear side of the right leg bracket fixing plate.

[0015] In yet another specific embodiment of the present invention, a left angle adjuster corresponding hole is formed at the upper end of the left swing arm, and a right angle adjuster corresponding hole is formed at the upper end of the right swing arm. The left angle adjuster is fixed to the left swing arm at the position of the left angle adjuster corresponding hole, and the right angle adjuster is fixed to the right swing arm at the position of the right angle adjuster corresponding hole.

[0016] In a further specific embodiment of the present invention, the structure of the right angle adjuster is the same as that of the left angle adjuster. The left angle adjuster includes a housing, a swing arm drive gear disc, a fixed gear disc, a drive gear and a cam. The housing forms a gear disc accommodating cavity. A swing arm drive gear disc cavity is formed on the right side of the swing arm drive gear disc. An inner gear ring of the swing arm drive gear disc is formed on the cavity wall of the swing arm drive gear disc cavity and around the circumferential direction of the cavity wall of the swing arm drive gear disc cavity. The left side of the swing arm drive gear disc is fixed to the right side of the upper end of the left swing arm. A camshaft head insertion hole of the swing arm drive gear disc is provided at the central position of the swing arm drive gear disc. A fixed gear disc cavity is formed on the left side of the fixed gear disc. An inner gear ring of the fixed gear disc is formed on the cavity wall of the fixed gear disc cavity and around the circumferential direction of the cavity wall of the fixed gear disc cavity. A camshaft head insertion hole of the fixed gear disc is provided at the central position of the fixed gear disc. The right side of the fixed gear disc is fixed to the left angle adjuster fixing plate at a position corresponding to the upper left side of the left angle adjuster fixing plate. The drive gear is located in the cavity jointly formed by the swing arm drive gear disc cavity and the fixed gear disc cavity. The outer gear ring of the drive gear formed on the outer wall in the circumferential direction of the drive gear meshes with the inner gear ring of the swing arm drive gear disc and the inner gear ring of the fixed gear disc. A cam mating cavity is formed at the center of the drive gear. A self-lubricating bushing is provided outside the cam. The self-lubricating bushing and the cam are rotatably arranged in the cam mating cavity. A camshaft head extends from each of the left side surface and the right side surface of the cam. The camshaft head located on the left side surface of the cam is rotatably mated with the camshaft head insertion hole of the swing arm drive gear disc, and the camshaft head located on the right side surface of the cam is rotatably mated with the camshaft head insertion hole of the fixed gear disc. A transmission shaft transmission connection hole is formed at the central position of the camshaft head. The transmission shaft is transmission-connected to the camshaft head at a position corresponding to the transmission shaft transmission connection hole. Among them, after the swing arm drive gear disc and the fixed gear disc are mated face to face and together with the drive gear are arranged in the gear disc accommodating cavity of the housing, and the camshaft head extends out of the gear disc accommodating cavity.

[0017] In still another specific embodiment of the present invention, at the upper end of the left angle adjuster fixing plate and at a position corresponding to the corresponding hole of the left angle adjuster, a fixing tooth disc fixing relief hole is provided. Fixing tooth disc positioning boss holes are provided at intervals in the circumferential direction around the fixing tooth disc fixing relief hole. On the right side surface of the fixing tooth disc and at a position corresponding to the fixing tooth disc positioning boss hole, a fixing tooth disc positioning boss is formed. The fixing tooth disc positioning boss is fixed to the upper end of the left angle adjuster fixing plate at a position corresponding to the fixing tooth disc positioning boss hole. The transmission shaft connection hole and the transmission shaft transmission connection hole are spline holes. The transmission shaft is a spline shaft and is in spline transmission connection with the transmission shaft connection hole and the transmission shaft transmission connection hole. The number of teeth forming the internal tooth ring of the fixing tooth disc is one more than the number of teeth forming the internal tooth ring of the swing arm driving tooth disc, and the inner diameter of the fixing tooth disc cavity is smaller than the inner diameter of the swing arm driving tooth disc cavity. The cross-sectional shape of the housing is in the shape of ┐.

[0018] Another object of the present invention is achieved in such a way that an automotive seat is provided with the leg rest adjusting device.

[0019] The technical effect of the technical solution provided by the present invention lies in that: since the concentric angle adjuster is innovatively applied as the left and right angle adjusters in the structural system of the leg rest adjusting device, it helps to significantly improve the synchronization accuracy, is beneficial to well sharing the load and reducing stress, is conducive to significantly simplifying the structure and ensuring stable movement, is convenient for reducing energy consumption and improving transmission efficiency, and is good at reducing the manufacturing cost and being easy to maintain due to the simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of an embodiment of the present invention; Figure 2 is Figure 1 a schematic view after rotating by an angle in the clockwise direction from the state shown; Figure 3 is Figure 1 and Figure 2 an assembled structural diagram of the left angle adjuster shown; Figure 4 is Figure 3 a schematic view observed from the left side surface of the fixing tooth disc shown; Figure 5 is Figures 1 to 3 a longitudinal sectional view of the left angle adjuster shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant will make a detailed description below in the form of embodiments. However, the descriptions of the embodiments are not limitations on the technical solutions of the present invention. Any equivalent transformation that is merely formal rather than substantial based on the concept of the present invention should be regarded as falling within the scope of the technical solutions of the present invention.

[0022] In the following description, all directional or positional concepts such as up, down, left, right, front, and back are based on the current position state Figure 1 for example, and thus cannot be understood as a special limitation on the technical solutions provided by the present invention.

[0023] Please refer to Figure 1 and Figure 2 , which shows a left angle adjuster fixing plate 1 and a right angle adjuster fixing plate 2. The left and right angle adjuster fixing plates 1 and 2 correspond to each other left and right and are respectively fixed to the opposite sides under the seat frame of the vehicle seat in the use state; a left angle adjuster 3, a right angle adjuster 4, a transmission shaft 5, and a transmission shaft driving mechanism 6 are shown. The left angle adjuster 3 is fixed to the upper end side of the left angle adjuster fixing plate 1, the right angle adjuster 4 is fixed to the upper end side of the right angle adjuster fixing plate 2, the left end of the transmission shaft 5 is drivingly connected to the left angle adjuster 3, and the right end of the transmission shaft 5 is drivingly connected to the right angle adjuster 4. Moreover, the position of the transmission shaft 5 between the left and right angle adjuster fixing plates 1 and 2 is also drivingly connected to the transmission shaft driving mechanism 6. In this embodiment, the transmission shaft driving mechanism 6 is fixed to the right side of the left angle adjuster fixing plate 1. However, the transmission shaft driving mechanism 6 can also be fixed to the left side of the right angle adjuster fixing plate 2 because although the carriers for fixing are different in form, the achieved purposes are the same; a left link mechanism 7, a right link mechanism 8, and a leg bracket 9 are shown. The left link mechanism 7 is connected to the left angle adjuster 3 and the left side of the left angle adjuster fixing plate 1, the right link mechanism 8 is connected to the right angle adjuster 4 and the right side of the right angle adjuster fixing plate 2, and the leg bracket 9 is fixed between the left and right link mechanisms 8 and 9.

[0024] As the technical key point of the technical solution provided by the present invention: the aforementioned left angle adjuster 3 and right angle adjuster 4 are concentric angle adjusters.

[0025] By Figure 1 and Figure 2As shown, left angle adjuster fixing plate mounting holes 13 are provided on the aforementioned left angle adjuster fixing plate 1, and right angle adjuster fixing plate mounting holes 21 are provided on the aforementioned right angle adjuster fixing plate 2. In the use state, fasteners such as bolts fix the left and right angle adjuster fixing plates 1 and 2 respectively at positions corresponding to the left and right angle adjuster fixing plate mounting holes 13 and 21 on the opposite sides facing each other under the seat frame of the vehicle seat. In addition, the aforementioned left angle adjuster 3 and right angle adjuster 4 can also be respectively referred to as the left angle adjusting device and the right angle adjusting device (the same hereinafter) or the left angle adjusting device assembly and the right angle adjusting device assembly (the same hereinafter).

[0026] Continue to see Figure 1 and Figure 2 , the aforementioned left link mechanism 7 includes a left swing arm 71, a left link 72, a left angle adjuster fixing plate articulated link 73, a left swing arm link 74, and a left leg bracket fixing plate 75. The left swing arm 71 is located on the left side of the aforementioned left angle adjuster fixing plate 1, and the upper end of the left swing arm 71 is fixedly connected to the aforementioned left angle adjuster 3. The middle part of the left swing arm 71 is articulated with the middle part of the left link 72 through a first left swing arm articulated pin 711, and the lower end of the left swing arm 71 is articulated with the lower end of the left swing arm link 74 through a second left swing arm articulated pin 712. The upper end of the left link 72 is articulated with the upper end of the left leg bracket fixing plate 75 through an upper left link articulated pin 721, and the lower end of the left link 72 is articulated with one end ( Figure 1 the lower end in the state shown Figure 1 of the left angle adjuster fixing plate articulated link 73), and the other end ( Figure 1 the upper end in the state shown Figure 1The upper end shown) is hinged to the right angle adjuster fixing plate 2 through the connecting rod pin shaft 831 of the right angle adjuster fixing plate. The upper end of the right swing arm connecting rod 84 is hinged to the middle part of the right fixing plate 85 of the leg bracket through the hinge pin shaft 841 of the right swing arm connecting rod. The lower end of the right fixing plate 85 of the leg bracket is configured as an extended end 851 of the right fixing plate of the leg bracket that extends downward.

[0027] As can be seen from the above description: The structures of the left and right connecting rod mechanisms 7 and 8 are the same and move synchronously during movement.

[0028] From Figure 1 and Figure 2 As shown, a swing arm parallel distance maintaining support member 10 is fixed between the facing sides of the aforementioned left swing arm 71 and the aforementioned right swing arm 81. In this embodiment, the swing arm parallel distance maintaining support member 10 is a hollow tubular structure, but it can also be a solid rod-shaped structure.

[0029] Continue to see Figure 1 and Figure 2 As shown in, the aforementioned drive shaft drive mechanism 6 includes a motor 61 and a reduction gearbox 62. The motor 61 is fixedly connected to the reduction gearbox 62 and is in transmission cooperation with the reduction gearbox 62. The reduction gearbox 62 together with the motor 61 is fixed to the right side of the aforementioned left angle adjuster fixing plate 1. The final-stage power output shaft 621 of the reduction gearbox 62 is formed with a drive shaft connection hole 6211. Since in this embodiment, the reduction gearbox 62 together with the motor 61 is fixed to the right side of the left angle adjuster fixing plate 1, the left end of the aforementioned drive shaft 5 is inserted into the drive shaft connection hole 6211 to be in transmission connection with the final-stage power output shaft 621 of the reduction gearbox, and the left end of the drive shaft 5 extends to the left side of the reduction gearbox 62 to be in transmission connection with the aforementioned left angle adjuster 3. However, if the reduction gearbox 62 together with the motor 61 is fixed to the left side of the aforementioned right angle adjuster fixing plate 2 by rotating 180° relative to the former, then the reduction gearbox 62 together with the motor 61 is fixed to the left side of the right angle adjuster fixing plate 2. The right end of the aforementioned drive shaft 5 is inserted into the drive shaft connection hole 6211 to be in transmission connection with the final-stage power output shaft 621 of the reduction gearbox, and the right end of the drive shaft 5 extends to the right side of the reduction gearbox 62 to be in transmission connection with the aforementioned right angle adjuster 4.

[0030] In Figure 1 and Figure 2 It is also shown the reduction gearbox fixing screw 622 for fixing the reduction gearbox 62 to the right side of the left angle adjuster fixing plate 1. Specifically, a screw fixing column 6221 for fixing the reduction gearbox fixing screw 622 is welded and fixed to the right side of the left angle adjuster fixing plate 1, and the reduction gearbox fixing screw 622 is fixed to the screw fixing column 6221.

[0031] In this embodiment, the aforementioned motor 61 is a DC motor with a forward and reverse function and is electrically connected to the vehicle-mounted power supply.

[0032] As shown by Figure 1 and Figure 2 the left end of the aforementioned leg bracket 9 is fixed to the rear side of the left fixing plate 75 of the leg bracket, and the right end of the leg bracket 9 is fixed to the rear side of the right fixing plate 85 of the leg bracket.

[0033] Continue to refer to Figure 1 and Figure 2 A left angle adjuster corresponding hole 713 is provided at the upper end of the aforementioned left swing arm 71 ( Figure 1 shown), and a right angle adjuster corresponding hole 813 is provided at the upper end of the aforementioned right swing arm 81 ( Figure 2 shown). The aforementioned left angle adjuster 3 is fixed to the left swing arm 71 at the position of the left angle adjuster corresponding hole 713, and the aforementioned right angle adjuster 4 is fixed to the right swing arm 81 at the position of the right angle adjuster corresponding hole 813.

[0034] Please refer to Figures 3 to 5 and in combination with Figure 1 and Figure 2, since the structure of the aforementioned right adjuster 4 is the same as that of the aforementioned left adjuster 3, the applicant will only describe the left adjuster 3 in detail below. The left adjuster 3 includes a housing 31, a swing arm drive gear disc 32, a fixed gear disc 33, a drive gear 34 and a cam 35. The housing 31 forms a gear disc receiving cavity 311. On the right side of the swing arm drive gear disc 32, a swing arm drive gear disc cavity 321 is formed. On the cavity wall of the swing arm drive gear disc cavity 321 and around the circumferential direction of the cavity wall of the swing arm drive gear disc cavity, a swing arm drive gear disc internal gear ring 3211 is formed. The left side of the swing arm drive gear disc 32 is preferably fixed to the upper right side of the aforementioned left swing arm 71 by welding. At the central position of the swing arm drive gear disc 32, a swing arm drive gear disc camshaft head insertion hole 322 is opened. On the left side of the fixed gear disc 33, a fixed gear disc cavity 331 is formed. On the cavity wall of the fixed gear disc cavity 331 and around the circumferential direction of the cavity wall of the fixed gear disc cavity, a fixed gear disc internal gear ring 3311 is formed. At the central position of the fixed gear disc 33, a fixed gear disc camshaft head insertion hole 332 is opened. The right side of the fixed gear disc 33 is fixed to the left adjuster fixing plate 1 at a position corresponding to the upper left end of the aforementioned left adjuster fixing plate 1. The drive gear 34 is located in the cavity jointly formed by the aforementioned swing arm drive gear disc cavity 321 and the fixed gear disc cavity 331. The drive gear external gear ring 341 formed on the outer wall of the drive gear 34 in the circumferential direction meshes with the aforementioned swing arm drive gear disc internal gear ring 3211 and the fixed gear disc internal gear ring 3311. A cam mating cavity 342 is formed in the center of the drive gear 34. A self-lubricating bushing 36 is provided outside the cam 35. The self-lubricating bushing 36 together with the cam 35 is rotatably arranged in the cam mating cavity 342. And on the left side surface and the right side surface of the cam 35, a camshaft head 351 extends respectively. The camshaft head 351 located on the left side surface of the cam 35 is rotatably mated with the aforementioned swing arm drive gear disc camshaft head insertion hole 322, while the camshaft head 351 located on the right side surface of the cam 35 is rotatably mated with the aforementioned fixed gear disc camshaft head insertion hole 332. A transmission shaft transmission connection hole 3511 is formed at the central position of the camshaft head 351. The aforementioned transmission shaft 5 is transmission-connected to the camshaft head 351 at a position corresponding to the transmission shaft transmission connection hole 3511. Among them, after the aforementioned swing arm drive gear disc 32 and the fixed gear disc 33 are mated face to face and together with the aforementioned drive gear 34 are arranged in the gear disc receiving cavity 311 of the aforementioned housing 31, and the aforementioned camshaft head 351 protrudes out of the gear disc receiving cavity 311.

[0035] At the upper end of the aforementioned left adjuster fixing plate 1 and at a position corresponding to the aforementioned left adjuster corresponding hole 713, a fixed gear disc fixing relief hole 11 ( Figure 2 shown) is opened. Around the circumferential direction of the fixed gear disc fixing relief hole 11, fixed gear disc positioning boss holes 12 ( Figure 2As shown, on the right side surface of the aforementioned fixed gear disk 33 and at a position corresponding to the fixed gear disk positioning boss hole 12, a fixed gear disk positioning boss 333 is formed. The fixed gear disk positioning boss 333 is fixed to the upper end of the aforementioned left angle adjuster fixing plate 1 at a position corresponding to the fixed gear disk positioning boss hole 12. The aforementioned fixed gear disk positioning boss 333 is formed by stamping the fixed gear disk 33 to transfer the material to the right side. The aforementioned transmission shaft connection hole 6211 and the aforementioned transmission shaft driving connection hole 3511 are spline holes. The aforementioned transmission shaft 5 is a spline shaft and is spline-drivenly connected to the transmission shaft connection hole 6211 and the transmission shaft driving connection hole 3511.

[0036] In this embodiment, the number of teeth forming the inner gear ring 3311 of the aforementioned fixed gear disk is one more than the number of teeth forming the inner gear ring 3211 of the aforementioned swing arm drive gear disk, and the inner diameter of the aforementioned fixed gear disk cavity 331 is smaller than the inner diameter of the aforementioned swing arm drive gear disk cavity 321; the cross-sectional shape of the aforementioned housing 31 is in the shape of ┐.

[0037] From the above Figure 3 shown structure and combined with the applicant's description of Figures 3 to 5 it can be seen that the inner gear ring 3311 of the aforementioned fixed gear disk 33 is substantially equivalent to a stationary gear ring, and this stationary gear ring is equivalent to a fixed sun gear. The inner gear ring 3211 of the swing arm drive gear disk cavity 321 is equivalent to a power output gear ring, and the drive gear 34 is like a planetary gear effect. Thus, when the inner gear ring 3311 of the fixed gear disk is stationary, the revolution and rotation of the drive gear 34 will drive the inner gear ring 3211 of the swing arm drive gear disk to rotate.

[0038] The present invention also provides an automobile seat, which has the aforementioned leg rest adjusting device, that is to say, an automobile seat equipped with the aforementioned leg rest adjusting device, and this automobile seat can faithfully and comprehensively achieve the technical effects recorded by the applicant in the technical effect column above.

[0039] When the previously outward (i.e., backward-extended) leg bracket 9 is to be retracted, the rider can operate a corresponding switch such as a touch button on the controller provided on the side of the seat or other suitable positions (since the positions set for different vehicles are not all the same), causing the motor 61 to operate, driving the reduction gearbox 62. The output shaft 621 at the end of the reduction gearbox drives the drive shaft 5 connected thereto, and the drive shaft 5 simultaneously drives the left and right angle adjusters 3 and 4. Since the structures of the left and right angle adjusters 3 and 4 are the same, and their actions and the process of driving the left and right linkages 7 and 8 are also the same, the applicant will only describe the left angle adjuster 3 and the left linkage mechanism 7 below. Under the action of the drive shaft 5 driving the camshaft head 351 of the cam 35 (i.e., rotation), the cam 35 drives the drive gear 34. The outer gear ring 341 of the drive gear 34 moves in a state of meshing with the outer gear ring 341 of the drive gear and the inner gear ring 3311 of the fixed gear disk. Since the number of teeth of the inner gear ring 3311 of the fixed gear disk 33 of the fixed gear disk is one less, and since the inner diameter of the fixed gear disk cavity 331 of the fixed gear disk 33 is smaller than the inner diameter of the swing arm drive gear disk cavity 321 of the swing arm drive gear disk 32, and since the fixed gear disk 33 is fixed to the left angle adjuster fixing plate 1 at the position corresponding to the fixed gear disk positioning boss hole 12 through the fixed gear disk positioning boss 333, when the drive shaft drives the cam 35 together with the self-lubricating bushing 36 sleeved thereon to rotate through the camshaft head 351, it drives the drive gear 34 to rotate in the same direction, and the drive gear 34 drives the swing arm drive gear disk 32 to rotate in the corresponding same direction. Since the swing arm drive gear disk 32 is welded and fixed to the upper end of the aforementioned left swing arm 71 at the position corresponding to the left swing arm corresponding hole 713, when the upper end of the left swing arm 71 rotates backward (or can be said to swing backward and downward), the lower end of the left swing arm 71 moves forward (or can be said to rotate forward). Since the swing arm drive gear disk 32 is fixed (welded and fixed) to the left swing arm 71 at the position corresponding to the left angle adjuster corresponding hole 713, when the left swing arm 71 is driven by the swing arm drive gear disk 32, the lower end of the left swing arm 74 and the middle part of the left linkage 72 hinged through the left swing arm first hinge pin 711 are driven by the lower end of the left swing arm 71, causing the left swing arm linkage 74 and the left linkage 72 to move, that is, when the upper ends of the left swing arm linkage 74 and the left linkage 72 ( Figure 1 in the position state shown) rotate correspondingly, the left leg bracket fixing plate 75 is driven, and the leg bracket 9 is displaced by the left leg bracket fixing plate 75 and tends to be in the Figure 1 retracted state shown. Vice versa for the same example. That is, as long as the aforementioned motor 61 rotates in the opposite direction to the previous rotation direction, the leg bracket 9 extends.

[0040] In summary, the technical solution provided by the present invention makes up for the deficiencies in the prior art, successfully completes the invention task, and truthfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A leg support adjustment device, comprising a left angle adjuster fixing plate (1) and a right angle adjuster fixing plate (2), wherein the left and right angle adjuster fixing plates (1, 2) correspond to each other on the left and right sides and are respectively fixed to the opposite sides of the lower side of the seat frame of the automobile seat when in use; a left angle adjuster (3), a right angle adjuster (4), a transmission shaft (5) and a transmission shaft driving mechanism (6), wherein the left angle adjuster (3) is fixed to the upper end side of the left angle adjuster fixing plate (1), the right angle adjuster (4) is fixed to the upper end side of the right angle adjuster fixing plate (2), the left end of the transmission shaft (5) is transmission-connected to the left angle adjuster (3), and the right end of the transmission shaft (5) is transmission-connected to the right angle adjuster (4). The invention relates to a device for supporting a leg of a left recliner (3) and a right recliner fixing plate (1). The device comprises a transmission shaft (5) and a transmission shaft driving mechanism (6) at a position between the left and right recliner fixing plates (1, 2), and the transmission shaft driving mechanism (6) is fixed to the right side of the left recliner fixing plate (1) or the left side of the right recliner fixing plate (2); a left connecting rod mechanism (7), a right connecting rod mechanism (8) and a leg bracket (9), wherein the left connecting rod mechanism (7) is connected to the left recliner (3) and the left side of the left recliner fixing plate (1), the right connecting rod mechanism (8) is connected to the right recliner (4) and the right side of the right recliner fixing plate (2), and the leg bracket (9) is fixed between the left and right connecting rod mechanisms (8, 9); the device is characterized in that: The left angle adjuster (3) and the right angle adjuster (4) are concentric angle adjusters.

2. The leg support adjustment device according to claim 1, characterized in that: The left connecting rod mechanism (7) comprises a left swing arm (71), a left connecting rod (72), a left angle adjuster fixing plate hinge connecting rod (73), a left swing arm connecting rod (74) and a left leg bracket fixing plate (75), wherein the left swing arm (71) is located on the left side of the left angle adjuster fixing plate (1), and the upper end of the left swing arm (71) is fixedly connected to the left angle adjuster (3), the middle part of the left swing arm (71) is hinged to the middle part of the left connecting rod (72) through the left swing arm first hinge pin (711), and the lower end of the left swing arm (71) is hinged to the lower end of the left swing arm connecting rod (74) through the left swing arm second hinge pin (712), and the upper end of the left connecting rod (72) is hinged to the left swing arm connecting rod (74) through the left connecting rod The upper hinge pin (721) is hinged to the upper end of the left fixed plate (75) of the leg bracket, and the lower end of the left connecting rod (72) is hinged to one end of the left angle adjuster fixed plate hinge connecting rod (73) through the lower hinge pin (722) of the left connecting rod, and the other end of the left angle adjuster fixed plate hinge connecting rod (73) is hinged to the left angle adjuster fixed plate (1) through the left angle adjuster fixed plate hinge connecting rod pin (731), the upper end of the left swing arm connecting rod (74) is hinged to the middle part of the left fixed plate (75) of the leg bracket through the left swing arm connecting rod hinge pin (741), and the lower end of the left fixed plate (75) of the leg bracket is configured as a leg bracket left fixed plate extension end (751) extending downward; The right connecting rod mechanism (8) comprises a right swing arm (81), a right connecting rod (82), a right angle adjuster fixing plate hinge connecting rod (83), a right swing arm connecting rod (84) and a right fixing plate (85) of the leg bracket. The right swing arm (81) is located on the right side of the right angle adjuster fixing plate (2), and the upper end of the right swing arm (81) is fixedly connected to the right angle adjuster (4). The middle part of the right swing arm (81) is hinged to the middle part of the right connecting rod (82) through the first hinge pin shaft (811) of the right swing arm, and the lower end of the right swing arm (81) is hinged to the lower end of the right swing arm connecting rod (84) through the second hinge pin shaft (812) of the right swing arm. The upper end of the right connecting rod (82) is hinged to the lower end of the right swing arm connecting rod (84) through the right connecting rod. The upper hinge pin (821) is hinged to the upper end of the right fixed plate (85) of the leg bracket, and the lower end of the right connecting rod (82) is hinged to one end of the right angle adjuster fixed plate hinge connecting rod (83) through the lower hinge pin (822) of the right connecting rod, and the other end of the right angle adjuster fixed plate hinge connecting rod (83) is hinged to the right angle adjuster fixed plate (2) through the right angle adjuster fixed plate hinge connecting rod pin (831), the upper end of the right swing arm connecting rod (84) is hinged to the middle part of the right fixed plate (85) of the leg bracket through the right swing arm connecting rod hinge pin (841), and the lower end of the right fixed plate (85) of the leg bracket is configured as a downwardly extending right fixed plate extension end (851) of the leg bracket.

3. The leg support adjustment device according to claim 2, characterized in that: A swing arm parallel distance maintaining support member (10) is fixed between the opposite sides of the left swing arm (71) and the right swing arm (81), and the swing arm parallel distance maintaining support member (10) is a hollow tubular structure or a solid rod-shaped structure.

4. The leg support adjustment device according to claim 2, characterized in that: The transmission shaft driving mechanism (6) comprises a motor (61) and a reduction box (62); the motor (61) is fixedly connected to the reduction box (62) and is in transmission cooperation with the reduction box (62); the reduction box (62) together with the motor (61) is fixed to the right side of the left angle adjuster fixing plate (1) or to the left side of the right angle adjuster fixing plate (2); the reduction box final power output shaft (621) of the reduction box (62) is formed with a transmission shaft connecting hole (6211); when the reduction box (62) together with the motor (61) is fixed to the right side of the left angle adjuster fixing plate (1), the left end of the transmission shaft (5) The transmission shaft (5) is inserted into the transmission shaft connection hole (6211) and is transmission-connected with the final power output shaft (621) of the reduction box, and the left end of the transmission shaft (5) extends to the left side of the reduction box (62) and is transmission-connected with the left angle adjuster (3). When the reduction box bar (62) together with the motor (61) are fixed to the left side of the right angle adjuster fixing plate (2), the right end of the transmission shaft (5) is inserted into the transmission shaft connection hole (6211) and is transmission-connected with the final power output shaft (621) of the reduction box, and the right end of the transmission shaft (5) extends to the right side of the reduction box (62) and is transmission-connected with the right angle adjuster (4).

5. The leg support adjustment device according to claim 4, characterized in that: The motor (61) is a DC motor with forward and reverse rotation functions and is electrically connected to the vehicle-mounted power supply.

6. The leg support adjustment device according to claim 3, characterized in that: The left end of the leg bracket (9) is fixed to the rear side of the left fixing plate (75) of the leg bracket, and the right end of the leg bracket (9) is fixed to the rear side of the right fixing plate (85) of the leg bracket.

7. The leg support adjustment device according to claim 4, characterized in that: A left angle adjuster corresponding hole (713) is provided at the upper end of the left swing arm (71), and a right angle adjuster corresponding hole (813) is provided at the upper end of the right swing arm (81); the left angle adjuster (3) is fixed to the left swing arm (71) at the position of the left angle adjuster corresponding hole (713), and the right angle adjuster (4) is fixed to the right swing arm (81) at the position of the right angle adjuster corresponding hole (813).

8. The leg support adjustment device according to claim 7, characterized in that: The structure of the right angle adjuster (4) is the same as that of the left angle adjuster (3). The left angle adjuster (3) comprises a casing (31), a swing arm driving toothed disc (32), a fixed toothed disc (33), a driving gear (34) and a cam (35). The casing (31) is formed with a toothed disc accommodating cavity (311). A swing arm driving toothed disc cavity (321) is formed on the right side of the swing arm driving toothed disc (32). A swing arm driving toothed disc inner gear ring (3211) is formed on the swing arm driving toothed disc cavity wall of the swing arm driving toothed disc cavity (321) and around the circumferential direction of the swing arm driving toothed disc cavity wall. The left side of the swing arm driving toothed disc (32) is fixed to the right side of the upper end of the left swing arm (71). A swing arm driving gear disc camshaft head insertion hole (322) is provided at the center position of the driving gear disc (32); a fixed gear disc cavity (331) is formed on the left side of the fixed gear disc (33); a fixed gear disc inner gear ring (3311) is formed on the fixed gear disc cavity wall of the fixed gear disc cavity (331) and around the circumferential direction of the fixed gear disc cavity wall; a fixed gear disc camshaft head insertion hole (332) is provided at the center position of the fixed gear disc (33); the right side of the fixed gear disc (33) is fixed to the left angle adjuster fixing plate (1) at a position corresponding to the left side of the upper end of the left angle adjuster fixing plate (1); and the driving gear (34) is located between the swing arm driving gear disc cavity (321) and the fixed gear disc cavity ( In a cavity formed by the cam (35), an outer gear ring (341) of the driving gear (34) formed on the outer wall in the circumferential direction of the driving gear (34) meshes with the inner gear ring (3211) of the swing arm driving gear plate and the inner gear ring (3311) of the fixed gear plate. A cam matching cavity (342) is formed in the center of the driving gear (34). A self-lubricating bushing (36) is arranged outside the cam (35). The self-lubricating bushing (36) is rotatably arranged together with the cam (35) in the cam matching cavity (342). A camshaft head (351) extends from the left side and the right side of the cam (35). The camshaft head (351) located on the left side of the cam (35) meshes with the cam of the swing arm driving gear plate. The wheel shaft head is rotationally matched with the insertion hole (322), and the camshaft head (351) located on the right side of the cam (35) is rotationally matched with the fixed gear plate camshaft head insertion hole (332), and a transmission shaft transmission connection hole (3511) is formed at the central position of the camshaft head (351), and the transmission shaft (5) is transmission-connected with the camshaft head (351) at a position corresponding to the transmission shaft transmission connection hole (3511), wherein, after the swing arm driving gear plate (32) and the fixed gear plate (33) are face-to-face matched, they are arranged together with the driving gear (34) in the gear plate accommodating cavity (311) of the housing (31), and the camshaft head (351) protrudes out of the gear plate accommodating cavity (311).

9. The leg support adjustment device according to claim 8, characterized in that: A fixed toothed disc fixing clearance hole (11) is provided at the upper end of the left angle adjuster fixing plate (1) and at a position corresponding to the corresponding hole (713) of the left angle adjuster. Fixed toothed disc positioning boss holes (12) are provided in a spaced manner in a circumferential direction around the fixed toothed disc fixing clearance hole (11). A fixed toothed disc positioning boss (333) is formed on the right side surface of the fixed toothed disc (33) and at a position corresponding to the fixed toothed disc positioning boss hole (12). The fixed toothed disc positioning boss (333) is aligned with the left angle adjuster fixing plate at a position corresponding to the fixed toothed disc positioning boss hole (12). The upper end of (1) is fixed; the transmission shaft connecting hole (6211) and the transmission shaft transmission connecting hole (3511) are spline holes, and the transmission shaft (5) is a spline shaft and is spline-connected to the transmission shaft connecting hole (6211) and the transmission shaft transmission connecting hole (3511); the number of teeth constituting the fixed gear disc inner gear ring (3311) is one more than the number of teeth constituting the swing arm drive gear disc inner gear ring (3211), and the inner diameter of the fixed gear disc cavity (331) is smaller than the inner diameter of the swing arm drive gear disc cavity (321); the cross-sectional shape of the housing (31) is in the shape of a letter "┐".

10. A car seat, characterized in that A leg support adjustment device as claimed in claim 1.

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