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 utility model 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 utility model belongs to the technical field of automobile seat, specifically relates to a leg rest adjusting device, and still further relates to its automobile seat. BACKGROUND

[0002] The aforementioned leg rest, also known as leg support, is usually configured on medium-high-end vehicles or vehicles focusing on comfort. The aforementioned medium-high-end vehicles are typically but not limited to flagship sedans (e.g., Mercedes-Benz S-Class, BMW 7 Series, Audi A8, etc.), high-end MPVs (e.g., Toyota Alphard / Vellfire, Buick GL8 Avenir, Mercedes-Benz V-Class, etc.), performance cars / GT sports cars (e.g., Porsche, BMW 8 Series, etc.), high-energy high-end cars (e.g., Tesla, NIO ET7, Ideal, etc.), and high-specification family sedans (e.g., Toyota Camry, Volkswagen Tuguan, etc.).

[0003] Technical information on leg rest adjusting devices can be found in a large number of published Chinese patent documents, such as CN203557986U (Automobile Seat Leg Rest Adjusting Mechanism), CN212386376U (Leg Rest Adjusting Mechanism of Automobile Seat), CN210011655U (Improved Structure of Automobile Leg Rest Adjusting), CN111660902A (Leg Rest Adjusting Structure of Automobile Seat), etc.

[0004] A typical "seat and its leg rest adjusting device" as recommended in the publication No. CN103209604A is proposed in view of the deficiencies (paragraphs 0005 to 0006 of the specification) existing in CN101580034A (leg rest mechanism of automobile seat), CN201729085U (leg rest adjusting mechanism of automobile electric seat) and CN201729089U (leg rest adjusting mechanism of automobile seat), aiming at effectively controlling the required arrangement vacancy through the structural optimization of the transmission mechanism, the technical essence of the patent application is: "including an angle adjuster, the fixed part of the angle adjuster is used for connecting with the fixed part of the seat, the angle adjuster is a self-locking angle adjuster; the power input rod of the connecting rod mechanism is connected with the rotating output part of the angle adjuster, and the power output rod is used for connecting with the leg rest, so as to adjust the posture of the leg rest between the extended state and the retracted state". It can be seen that it is a beneficial thing to use the self-locking angle adjuster for adjusting the angle between the seat back and the seat. Typical examples of the aforementioned self-locking angle adjuster are CN1149157C (adjusting assembly for a seat with adjustable backrest inclination, in particular for a car seat), CN100445126C (adjusting accessory for a car seat), WO2008 / 018650A1 (a seat reclining device), CN2907393Y (gear type seat angle stepless adjusting structure), CN101070055A (gear type seat angle stepless adjusting structure) and CN2479814Y (back gap eliminating device). More typical is CN101941389A (seat angle adjuster and seat with the same).

[0005] As a manufacturer of automobile seat angle adjusters, the self-locking angle adjuster originally used for adjusting the angle of the seat back is used in the structural system of the leg rest adjusting device, which has the advantages of component reuse, no need to develop new technology, saving development resources and development costs, and effectively reducing the comprehensive cost. However, there are some disadvantages in applying the self-locking angle adjuster to the structural system of the leg rest adjusting device: first, due to the existence of backlash in the self-locking angle adjuster, it is easy to appear out of synchronization 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 spline shaft); third, due to the need for many components in the structural system of the self-locking angle adjuster, the structure is relatively complex, which makes the action unstable; 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] Although the self-locking angle adjuster has many defects not limited to the foregoing, why is it that the market almost universally uses it and no relevant information has been seen to question it substantially. However, the applicant believes that this is caused by technical bias, because whether the designers of automobile parts, the manufacturers of automobile seat assemblies, or even automobile manufacturers, are often influenced to some extent by the habit of thinking mode, and form a conservative consensus based on the influence. Content of the utility model

[0007] The task of the utility model is to provide a leg support adjusting device which helps to significantly improve synchronization accuracy, is beneficial to well sharing load and reducing stress, is beneficial to significantly simplifying structure and ensuring stable operation, is beneficial to reducing energy consumption and improving transmission efficiency, and is beneficial to significantly reducing cost and being convenient to maintain.

[0008] Another task of the utility model is to provide an automobile seat which can fully embody the technical effects of the leg support adjusting device.

[0009] The primary task of the utility model is achieved in this way. A leg support adjusting device comprises a left angle adjuster fixing plate and a right angle adjuster fixing plate, the left and right angle adjuster fixing plates correspond to each other and are fixed to opposite sides below a seat frame of an automobile seat in a 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 end side of the left angle adjuster fixing plate, the right angle adjuster is fixed to the upper end side of the right angle adjuster fixing plate, the left end of the transmission shaft is in transmission connection with the left angle adjuster, the right end of the transmission shaft is in transmission connection with the right angle adjuster, and the transmission shaft is further in transmission connection with the transmission shaft driving mechanism at a position between the left and right angle adjuster fixing plates, 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 connecting rod mechanism, a right connecting rod mechanism and a leg support bracket, the left connecting rod mechanism is connected with the left angle adjuster and the left side of the left angle adjuster fixing plate, the right connecting rod mechanism is connected with the right angle adjuster and the right side of the right angle adjuster fixing plate, and the leg support bracket is fixed between the left and right connecting rod mechanisms; characterized in that the left angle adjuster and the right angle adjuster are concentric angle adjusters.

[0010] In one specific embodiment of the utility model, the left connecting rod mechanism includes left swing arm, left connecting rod, left angle adjuster fixed plate articulated connecting rod, left swing arm connecting rod and leg support left fixed plate, left swing arm is located the left side of left angle adjuster fixed plate, and the upper end of this left swing arm is fixedly connected with left angle adjuster, the middle part of left swing arm is articulated with the middle part of left connecting rod through left swing arm first articulated pin shaft, and the lower end of left swing arm is articulated with the lower end of left swing arm connecting rod through left swing arm second articulated pin shaft, the upper end of left connecting rod is articulated with the upper end of leg support left fixed plate through left connecting rod upper articulated pin shaft, and the lower end of left connecting rod is articulated with one end of left angle adjuster fixed plate articulated connecting rod through left connecting rod lower articulated pin shaft, and the other end of this left angle adjuster fixed plate articulated connecting rod is articulated with left angle adjuster through left angle adjuster fixed plate articulated connecting rod pin shaft, the upper end of left swing arm connecting rod is articulated with the middle part of leg support left fixed plate through left swing arm connecting rod articulated pin shaft, and the lower end of leg support left fixed plate is formed into leg support left fixed plate extension end extending downward;The right connecting rod mechanism includes right swing arm, right connecting rod, right angle adjuster fixed plate articulated connecting rod, right swing arm connecting rod and leg support right fixed plate, right swing arm is located the right side of right angle adjuster fixed plate, and the upper end of this right swing arm is fixedly connected with right angle adjuster, the middle part of right swing arm is articulated with the middle part of right connecting rod through right swing arm first articulated pin shaft, and the lower end of right swing arm is articulated with the lower end of right swing arm connecting rod through right swing arm second articulated pin shaft, the upper end of right connecting rod is articulated with the upper end of leg support right fixed plate through right connecting rod upper articulated pin shaft, and the lower end of right connecting rod is articulated with one end of right angle adjuster fixed plate articulated connecting rod through right connecting rod lower articulated pin shaft, and the other end of this right angle adjuster fixed plate articulated connecting rod is articulated with right angle adjuster through right angle adjuster fixed plate articulated connecting rod pin shaft, the upper end of right swing arm connecting rod is articulated with the middle part of leg support right fixed plate through right swing arm connecting rod articulated pin shaft, and the lower end of leg support right fixed plate is formed into leg support right fixed plate extension end extending downward.

[0011] In another specific embodiment of the utility model, a swing arm parallel distance maintaining support is fixed between the opposite sides of the left swing arm and the right swing arm, and the swing arm parallel distance maintaining support is configured as a hollow tubular body or a solid rod body.

[0012] In still another specific embodiment of the utility model, the transmission shaft drive mechanism includes a motor and a reduction box, the motor is fixedly connected with the reduction box and is in transmission cooperation with the reduction box, the reduction box is fixed with the right side of the left angle adjuster fixed plate or the left side of the right angle adjuster fixed plate together with the motor, the reduction box final stage power output shaft of the reduction box is formed with a transmission shaft connecting hole;When the reduction box is fixed with the right side of the left angle adjuster fixed plate together with the motor, the left end of the transmission shaft is inserted into the transmission shaft connecting hole and is in transmission cooperation with the reduction box final stage power output shaft, and the left end of the transmission shaft is extended to the left side of the reduction box and is in transmission cooperation with the left angle adjuster, and when the reduction box is fixed with the left side of the right angle adjuster fixed plate together with the motor, the right end of the transmission shaft is inserted into the transmission shaft connecting hole and is in transmission cooperation with the reduction box final stage power output shaft, and the right end of the transmission shaft is extended to the right side of the reduction box and is in transmission cooperation with the right angle adjuster.

[0013] In still another specific embodiment of the utility model, the motor is a direct current motor with forward and reverse rotation functions and is electrically connected with the vehicle-mounted power supply.

[0014] In still another specific embodiment of the utility model, the left end of the leg support frame is fixed with the rear side of the left leg support frame fixed plate, and the right end of the leg support frame is fixed with the rear side of the right leg support frame fixed plate.

[0015] In still another specific embodiment of the utility model, a left angle adjuster corresponding hole is formed in the upper end of the left swing arm, a right angle adjuster corresponding hole is formed in the upper end of the right swing arm, the left angle adjuster is fixed with the left swing arm at the position of the left angle adjuster corresponding hole, and the right angle adjuster is fixed with the right swing arm at the position of the right angle adjuster corresponding hole.

[0016] In a further specific embodiment of this utility model, 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, a fixed gear, a drive gear, and a cam. The housing forms a gear housing cavity, and a swing arm drive gear cavity is formed on the right side of the swing arm drive gear. An inner gear ring of the swing arm drive gear is formed on the wall of the swing arm drive gear cavity and around the circumference of the wall of the swing arm drive gear cavity. The left side of the swing arm drive gear is connected to... The upper right side of the left swing arm is fixed. A camshaft head insertion hole for the swing arm drive gear is opened at the center of the swing arm drive gear. The left side of the fixed gear forms a fixed gear cavity. An internal gear ring for the fixed gear is formed on the cavity wall of the fixed gear cavity and around the circumference of the cavity wall. A camshaft head insertion hole for the fixed gear is opened at the center of the fixed gear. The right side of the fixed gear is fixed to the left angle adjuster fixing plate at the position corresponding to the upper left side of the left angle adjuster fixing plate. The driving gear is located in the cavity formed by the swing arm drive gear disk cavity and the fixed gear disk cavity. The outer gear ring of the driving gear, which is formed on the outer wall of the circumference of the driving gear, meshes with the inner gear ring of the swing arm drive gear disk and the inner gear ring of the fixed gear disk. A cam engagement cavity is formed in the center of the driving gear. A self-lubricating bushing is provided outside the cam. The self-lubricating bushing and the cam are rotatably set in the cam engagement cavity. A camshaft head extends from the left side and the right side of the cam. The camshaft head on the left side of the cam is rotatably engaged with the camshaft head protrusion hole of the swing arm drive gear disk, and the camshaft head on the right side of the cam is rotatably engaged with the camshaft head protrusion hole of the fixed gear disk. A transmission shaft transmission connection hole is formed in the center of the camshaft head. The transmission shaft is connected to the camshaft head at the position corresponding to the transmission shaft transmission connection hole. After the swing arm drive gear disk and the fixed gear disk are face to face, they are set in the gear disk receiving cavity of the housing along with the driving gear, while the camshaft head protrudes out of the gear disk receiving cavity.

[0017] In still another embodiment of the utility model, a fixed tooth disc fixed parking hole is formed on the upper end of the left angle adjuster fixed plate and at a position corresponding to the left angle adjuster corresponding hole, a fixed tooth disc positioning boss hole is formed in the circumferential direction around the fixed tooth disc fixed parking hole in a spaced state, a fixed tooth disc positioning boss is formed on the right side surface of the fixed tooth disc and at a position corresponding to the fixed tooth disc positioning boss hole, and the fixed tooth disc positioning boss is fixed to the upper end of the left angle adjuster fixed plate at a position corresponding to the fixed tooth disc positioning boss hole; the transmission shaft connecting hole and the transmission shaft transmission connecting hole are spline holes, the transmission shaft is a spline shaft and is spline transmission connected with the transmission shaft connecting hole and the transmission shaft transmission connecting hole; the number of teeth forming the fixed tooth disc inner gear ring is one more than the number of teeth forming the swing arm drive tooth disc inner gear ring, and the inner diameter of the fixed tooth disc cavity is smaller than the inner diameter of the swing arm drive tooth disc cavity; the cross section of the sleeve shell is in the shape of a ┐.

[0018] Another task of the utility model is accomplished in this way, a car seat has the leg support adjusting device.

[0019] The technical effect of the technical scheme provided by the utility model lies in: since the concentric angle adjuster is applied as the left and right angle adjusters in the structural system of the leg support adjusting device for the first time, the synchronous precision can be improved significantly, the load can be shared well to reduce stress, the structure can be simplified significantly to ensure stable operation, the energy consumption can be reduced and the transmission efficiency can be improved, and the manufacturing cost can be reduced and the structure is simple to facilitate maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an embodiment structural diagram of the utility model;

[0021] Figure 2 It is Figure 1 It is a schematic view of the left angle adjuster after turning an angle in the clockwise direction from the state shown in the figure;

[0022] Figure 3 It is Figure 1 And Figure 2 It is an assembly structure diagram of the left angle adjuster shown in the figure;

[0023] Figure 4 It is Figure 3 It is a schematic view of the left side surface of the fixed tooth disc;

[0024] Figure 5 It is Figures 1 to 3 It is a longitudinal section schematic view of the left angle adjuster. DETAILED DESCRIPTION

[0025] In order to enable the technical essence and beneficial effects of the present application to be more clearly understood, the applicant will make a detailed description in the following manner by way of examples, but the description of the examples is not intended to limit the technical scheme of the present application, and any equivalent transformation made only in form but not in substance according to the concept of the present application should be regarded as falling within the technical scheme of the present application.

[0026] In the following description, the directional or positional concepts of up, down, left, right, front and back are all based on the current position state of the Figure 1 Therefore, it should not be understood as a special limitation on the technical scheme provided by the present application.

[0027] Please refer to Figure 1 and Figure 2 , a left angle adjuster fixing plate 1 and a right angle adjuster fixing plate 2 are shown, the left and right angle adjuster fixing plates 1, 2 correspond to each other left and right and are respectively fixed to the opposite sides below the seat frame of the car 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 in transmission connection with the left angle adjuster 3, and the right end of the transmission shaft 5 is in transmission connection with the right angle adjuster 4, and the position of the transmission shaft 5 between the left and right angle adjuster fixing plates 1, 2 is also in transmission connection with the transmission shaft driving mechanism 6, in the present embodiment, the transmission shaft driving mechanism 6 is fixed to the right side of the left angle adjuster fixing plate 1, but the transmission shaft driving mechanism 6 can also be fixed to the left side of the right angle adjuster fixing plate 2, because the fixed carriers of the two are different in form, but the purpose achieved is the same; a left connecting rod mechanism 7, a right connecting rod mechanism 8 and a leg bracket 9 are shown, the left connecting rod mechanism 7 is connected with the left angle adjuster 3 and the left side of the left angle adjuster fixing plate 1, the right connecting rod mechanism 8 is connected with 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 connecting rod mechanisms 8, 9.

[0028] As the technical key point of the technical scheme provided by the present application: the aforementioned left angle adjuster 3 and right angle adjuster 4 are concentric angle adjusters.

[0029] By Figure 1 and Figure 2As shown, a left angle adjuster mounting hole 13 is provided on the aforementioned left angle adjuster mounting plate 1, and a right angle adjuster mounting hole 21 is provided on the aforementioned right angle adjuster mounting plate 2. In use, fasteners such as bolts are used to fix the left and right angle adjuster mounting plates 1 and 2 to the opposite side (face-to-face) of the seat frame of the car seat at positions corresponding to the left and right angle adjuster mounting holes 13 and 21, respectively. Furthermore, the aforementioned left angle adjuster 3 and right angle adjuster 4 can also be referred to as a left angle adjusting device and a right angle adjusting device (hereinafter the same), or a left angle adjusting device assembly and a right angle adjusting device assembly (hereinafter the same).

[0030] See you later Figure 1 and Figure 2 The aforementioned left linkage mechanism 7 includes a left swing arm 71, a left link 72, a hinged link 73 for the left angle adjuster fixing plate, a left swing arm link 74, and a left leg support 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 hinged to the middle part of the left link 72 through the first hinge pin 711 of the left swing arm, and the lower end of the left swing arm 71 is hinged to the lower end of the left swing arm link 74 through the second hinge pin 712 of the left swing arm. The upper end of the left link 72 is hinged to the upper end of the left leg support fixing plate 75 through the upper hinge pin 721 of the left link, and the lower end of the left link 72 is hinged to one end of the hinged link 73 for the left angle adjuster fixing plate through the lower hinge pin 722 of the left link. Figure 1 The lower end of the left angle adjuster fixing plate is hinged to the other end of the hinged connecting rod 73 (as shown in the diagram). Figure 1 The upper end of the left arm linkage 74 is hinged to the left angle adjuster fixing plate 1 via the hinged connecting rod pin 731 of the left angle adjuster fixing plate. The upper end of the left arm linkage 74 is hinged to the middle of the left leg bracket fixing plate 75 via the hinged connecting rod pin 741 of the left arm linkage. The lower end of the left leg bracket fixing plate 75 is configured as a downwardly extending left leg bracket fixing plate extension end 751. The aforementioned right linkage mechanism 8 includes a right arm 81, a right link 82, a right angle adjuster fixing plate hinged connecting rod 83, a right arm linkage 84, and a right leg bracket fixing plate 85. The right arm 81 is located at the aforementioned right angle adjuster. The right side of the device fixing plate 2, and the upper end of the right swing arm 81 is fixedly connected to the aforementioned 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 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 812 of the right swing arm. The upper end of the right connecting rod 82 is hinged to the upper end of the right fixing plate 85 of the leg bracket through the upper hinge pin 821 of the right connecting rod, and the lower end of the right connecting rod 82 is hinged to one end of the connecting rod 83 of the right angle adjuster fixing plate through the lower hinge pin 822 of the right connecting rod. Figure 1 The lower end shown is hinged, while the other end of the right angle adjuster fixing plate is hinged to the connecting rod 83. Figure 1The upper end of the right swing arm connecting rod 84 is hinged to the middle part of the right leg bracket fixing plate 85 through a right swing arm connecting rod hinge pin 841. The lower end of the right leg bracket fixing plate 85 is configured as a right leg bracket fixing plate extension end 851 extending downward.

[0031] As can be seen from the above description, the left and right connecting rod mechanisms 7 and 8 are identical in structure and move synchronously.

[0032] As can be seen from the above description, the left and right connecting rod mechanisms 7 and 8 are identical in structure and move synchronously. Figure 1 and Figure 2 As shown in the figure, a swing arm parallel distance maintaining support 10 is fixed between the left swing arm 71 and the right swing arm 81. In this embodiment, the swing arm parallel distance maintaining support 10 is configured as a hollow tubular body, but it can also be configured as a solid rod.

[0033] Continuing to see Figure 1 and Figure 2 The transmission shaft driving mechanism 6 includes a motor 61 and a reduction box 62. The motor 61 is fixedly connected with the reduction box 62 and is in transmission cooperation with the reduction box 62. The reduction box 62 is fixed to the right side of the left angle adjuster fixing plate 1 together with the motor 61. The reduction box final stage power output shaft 621 of the reduction box 62 is configured with a transmission shaft connecting hole 6211. Since the reduction box 62 is fixed to the right side of the left angle adjuster fixing plate 1 together with the motor 61 in this embodiment, the left end of the transmission shaft 5 is inserted into the transmission shaft connecting hole 6211 and is in transmission cooperation with the reduction box final stage power output shaft 621, and the left end of the transmission shaft 5 extends to the left side of the reduction box 62 and is in transmission cooperation with the left angle adjuster 3. However, if the reduction box 62 is fixed to the left side of the right angle adjuster fixing plate 2 together with the motor 61 by being turned by 180° relative to the former, the reduction box 62 is fixed to the left side of the right angle adjuster fixing plate 2 together with the motor 61, the right end of the transmission shaft 5 is inserted into the transmission shaft connecting hole 6211 and is in transmission cooperation with the reduction box final stage power output shaft 621, and the right end of the transmission shaft 5 extends to the right side of the reduction box 62 and is in transmission cooperation with the right angle adjuster 4.

[0034] In Figure 1 and Figure 2 The reduction box fixing screw 622 for fixing the reduction box 62 to the right side of the left angle adjuster fixing plate 1 is also shown in the figure. Specifically, a screw fixing column 6221 for fixing the reduction box fixing screw 622 is welded to the right side of the left angle adjuster fixing plate 1, and the reduction box fixing screw 622 is fixed to the screw fixing column 6221.

[0035] In this embodiment, the motor 61 is a direct current motor with forward and reverse rotation functions and is electrically connected with the vehicle power supply.

[0036] As shown in Figure 1 and Figure 2 the left end of the aforementioned leg bracket 9 is fixed with the rear side of the aforementioned leg bracket left fixing plate 75, while the right end of the leg bracket 9 is fixed with the rear side of the aforementioned leg bracket right fixing plate 85.

[0037] Continuing to see Figure 1 and Figure 2 a left angle adjuster corresponding hole 713 is opened at the upper end of the aforementioned left swing arm 71 ( Figure 3 to 5 as shown), a right angle adjuster corresponding hole 813 is opened at the upper end of the aforementioned right swing arm 81 ( Figure 1 as shown), the aforementioned left angle adjuster 3 is fixed with the left swing arm 71 at the position of the left angle adjuster corresponding hole 713, while the aforementioned right angle adjuster 4 is fixed with the right swing arm 81 at the position of the right angle adjuster corresponding hole 813.

[0038] Please see Figure 2 and in combination with Figure 2 and Figure 2Since the structure of the aforementioned right angle adjuster 4 is the same as that of the aforementioned left angle adjuster 3, the applicant will only describe the left angle adjuster 3 in detail below, which comprises a casing 31, an arm drive gear disc 32, a fixed gear disc 33, a drive gear 34 and a cam 35, the casing 31 is provided with a gear disc accommodating cavity 311, the right side of the arm drive gear disc 32 is provided with an arm drive gear disc cavity 321, an arm drive gear disc inner ring gear 3211 is formed on the arm drive gear disc cavity cavity wall of the arm drive gear disc cavity 321 and around the circumferential direction of the arm drive gear disc cavity cavity wall, the left side of the arm drive gear disc 32 is preferably fixed to the right side of the upper end of the aforementioned left arm 71 by welding, a arm drive gear disc cam shaft head probe hole 322 is opened at the center position of the arm drive gear disc 32, the left side of the fixed gear disc 33 is provided with a fixed gear disc cavity 331, a fixed gear disc inner ring gear 3311 is formed on the fixed gear disc cavity cavity wall of the fixed gear disc cavity 331 and around the circumferential direction of the fixed gear disc cavity cavity wall, a fixed gear disc cam shaft head probe hole 332 is opened 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 fixed plate 1 at a position corresponding to the left side of the upper end of the aforementioned left angle adjuster fixed plate 1, the drive gear 34 is located in the cavity formed by the aforementioned arm drive gear disc cavity 321 and the fixed gear disc cavity 331, the drive gear outer ring gear 341 formed on the outer wall of the drive gear 34 in the circumferential direction is engaged with the aforementioned arm drive gear disc inner ring gear 3211 and the fixed gear disc inner ring gear 3311, the center of the drive gear 34 is provided with a cam matching cavity 342, a self-lubricating bushing 36 is provided outside the cam 35, the self-lubricating bushing 36 is rotatably arranged in the cam matching cavity 342 together with the cam 35, and a cam shaft head 351 extends from the left side and the right side of the cam 35 respectively, the cam shaft head 351 located on the left side of the cam 35 is rotatably matched with the aforementioned arm drive gear disc cam shaft head probe hole 322, and the cam shaft head 351 located on the right side of the cam 35 is rotatably matched with the aforementioned fixed gear disc cam shaft head probe hole 332, the central position of the cam shaft head 351 is provided with a transmission shaft transmission connection hole 3511, the aforementioned transmission shaft 5 is transmissionally connected with the cam shaft head 351 at a position corresponding to the transmission shaft transmission connection hole 3511, wherein, after the aforementioned arm drive gear disc 32 and the fixed gear disc 33 are matched face to face together with the aforementioned drive gear 34, they are arranged in the aforementioned gear disc accommodating cavity 311 of the aforementioned casing 31, and the aforementioned cam shaft head 351 protrudes out of the gear disc accommodating cavity 311.

[0039] A fixed gear disc fixed displacement hole 11 is opened at the upper end of the aforementioned left angle adjuster fixed plate 1 and at a position corresponding to the aforementioned left angle adjuster corresponding hole 713 Figure 3 A fixed gear disc fixed displacement hole 11 is opened at the upper end of the aforementioned left angle adjuster fixed plate 1 and at a position corresponding to the aforementioned left angle adjuster corresponding hole 713 Figure 3 to 5The fixed gear plate 33 is provided with a fixed gear plate positioning boss 333 on the right side of the fixed gear plate 33 and at a position corresponding to the fixed gear plate positioning boss hole 12, and the fixed gear plate positioning boss 333 is fixed to the upper end of the left angle adjuster fixed plate 1 at a position corresponding to the fixed gear plate positioning boss hole 12. The fixed gear plate positioning boss 333 is formed by stamping the fixed gear plate 33 to the right side. The transmission shaft connecting hole 6211 and the transmission shaft transmission connecting hole 3511 are spline holes, the transmission shaft 5 is a spline shaft and is spline transmission connected with the transmission shaft connecting hole 6211 and the transmission shaft transmission connecting hole 3511.

[0040] In the embodiment, the number of teeth constituting the fixed gear plate inner ring gear 3311 is one more than the number of teeth constituting the swing arm drive gear plate inner ring gear 3211, and the inner diameter of the fixed gear plate cavity 331 is smaller than the inner diameter of the swing arm drive gear plate cavity 321; the cross-sectional shape of the sleeve 31 is in the shape of a ┐.

[0041] From the above Figure 1 The structure shown and in combination with the applicant's description of Figure 1 The fixed gear plate inner ring gear 3311 of the fixed gear plate 33 substantially corresponds to a static gear ring, and the static gear ring corresponds to a fixed sun gear. The swing arm drive gear plate inner ring gear 3211 of the swing arm drive gear plate cavity 321 corresponds to a power output gear ring, and the drive gear 34 is like a planetary gear effect. Therefore, when the fixed gear plate inner ring gear 3311 is fixed, the revolution and rotation of the drive gear 34 will drive the swing arm drive gear plate inner ring gear 3211 to rotate.

[0042] The utility model also provides a kind of automobile seat, and the automobile seat has the aforementioned leg support adjusting device, that is, the automobile seat equipped with the aforementioned leg support adjusting device, and the automobile seat can like truthfully fully realize the technical effect recorded in the above technical effect column of applicant.

[0043] When the leg support 9 previously in outward i.e. backward stretching is to be retracted, then the corresponding off switch such as touch button on the controller provided at the side of the seat or other suitable location (as the location selected is not the same for different vehicles) can be operated by the occupant to make the motor 61 work, drive the reduction gearbox 62, drive the transmission shaft 5 connected with the power output shaft 621 at the end of the reduction gearbox, and simultaneously drive the left and right angle adjusters 3, 4 by the transmission shaft 5. Since the left and right angle adjusters 3, 4 are the same in structure, and the action and the process of driving the left and right connecting rods 7, 8 are also the same, the applicant will only describe the left angle adjuster 3 and the left connecting rod mechanism 7 below. Under the action i.e. rotation of the transmission shaft 5 driving the cam shaft head 351 of the cam 35, the cam 35 drives the drive gear 34, the drive gear outer ring 341 of the drive gear 34 moves in the state of engaging with the drive gear outer ring 341 and the fixed tooth disc inner ring 3311, since the number of teeth of the fixed tooth disc inner ring 3311 of the fixed tooth disc 33 is one less, and since the inner diameter of the fixed tooth disc cavity 331 of the fixed tooth disc 33 is smaller than the inner diameter of the swing arm drive gear cavity 321 of the swing arm drive gear 32, and also since the fixed tooth disc 33 is fixed with the left angle adjuster fixed plate 1 through the fixed tooth disc positioning boss 333 at the position corresponding to the fixed tooth disc positioning boss hole 12, when the transmission shaft rotates by driving the cam 35 through the cam shaft head 351 together with the self-lubricating bushing 36 sleeved outside, it drives the drive gear 34 to rotate in the same direction, and the swing arm drive gear 32 driven by the drive gear 34 also rotates in the same direction. Since the swing arm drive gear 32 is fixed with 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 (also can be called swings downward), the lower end of the left swing arm 71 moves forward (also can be called rotates forward), since the swing arm drive gear 32 is fixed (welded) with 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 32, the lower end of the left swing arm connecting rod 74 and the middle part of the left connecting rod 72 hinged through the left swing arm first hinge pin 711 are driven by the lower end of the left swing arm 71, so that the left swing arm connecting rod 74 and the left connecting rod 72 are driven to rotate, i.e. the process of driving the leg support left fixed plate 75 by the upper end of the left swing arm connecting rod 74 and the left connecting rod 72 corresponding to the rotation, the leg support 9 is displaced by the leg support left fixed plate 75 to tend to the retracted state shown in the figure, and vice versa. That is, as long as the aforementioned motor 61 rotates in the opposite direction relative to the previous rotation direction, the leg support 9 is extended. ​ ​

[0044] In summary, the technical scheme provided by the utility model makes up for the shortcomings in the prior art, successfully completes the invention task, and truly realizes the technical effects described in the technical effect column above.​​

Claims

1. A leg rest adjusting device comprising a left angle adjuster fixing plate (1) and a right angle adjuster fixing plate (2), the left and right angle adjuster fixing plates (1, 2) corresponding to each other and being fixed to the opposite sides of the lower part of the seat frame of a car seat in use; a left angle adjuster (3), a right angle adjuster (4), a transmission shaft (5) and a transmission shaft driving mechanism (6), the left angle adjuster (3) being fixed to the upper end side of the left angle adjuster fixing plate (1), the right angle adjuster (4) being fixed to the upper end side of the right angle adjuster fixing plate (2), the left end of the transmission shaft (5) being in driving connection with the left angle adjuster (3), the right end of the transmission shaft (5) being in driving connection with the right angle adjuster (4), and the position of the transmission shaft (5) between the left and right angle adjuster fixing plates (1, 2) being in driving connection with the transmission shaft driving mechanism (6), and the transmission shaft driving mechanism (6) being 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); a left connecting rod mechanism (7), a right connecting rod mechanism (8) and a leg rest frame (9), the left connecting rod mechanism (7) being connected to the left angle adjuster (3) and to the left side of the left angle adjuster fixing plate (1), the right connecting rod mechanism (8) being connected to the right angle adjuster (4) and to the right side of the right angle adjuster fixing plate (2), and the leg rest frame (9) being fixed between the left and right connecting rod mechanisms (7, 8); characterized in that: The left angle adjuster (3) and the right angle adjuster (4) are concentric angle adjusters.

2. The leg rest adjustment device of claim 1, wherein: The left connecting rod mechanism (7) comprises a left swing arm (71), a left connecting rod (72), a left angle adjuster fixing plate hinged connecting rod (73), a left swing arm connecting rod (74) and a leg bracket left fixing plate (75), 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 with the left angle adjuster (3), the middle part of the left swing arm (71) is hinged with the middle part of the left connecting rod (72) through a left swing arm first hinge pin (711), and the lower end of the left swing arm (71) is hinged with the lower end of the left swing arm connecting rod (74) through a left swing arm second hinge pin (712), the upper end of the left connecting rod (72) is hinged with the upper end of the leg bracket left fixing plate (75) through a left connecting rod upper hinge pin (721), the lower end of the left connecting rod (72) is hinged with one end of the left angle adjuster fixing plate hinged connecting rod (73) through a left connecting rod lower hinge pin (722), the other end of the left angle adjuster fixing plate hinged connecting rod (73) is hinged with the left angle adjuster fixing plate (1) through a left angle adjuster fixing plate hinged connecting rod pin (731), the upper end of the left swing arm connecting rod (74) is hinged with the middle part of the leg bracket left fixing plate (75) through a left swing arm connecting rod hinge pin (741), and the lower end of the leg bracket left fixing plate (75) is formed as a leg bracket left fixing 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 hinged connecting rod (83), a right swing arm connecting rod (84) and a leg bracket right fixing plate (85), 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 with the right angle adjuster (4), the middle part of the right swing arm (81) is hinged with the middle part of the right connecting rod (82) through a right swing arm first hinge pin (811), and the lower end of the right swing arm (81) is hinged with the lower end of the right swing arm connecting rod (84) through a right swing arm second hinge pin (812), the upper end of the right connecting rod (82) is hinged with the upper end of the leg bracket right fixing plate (85) through a right connecting rod upper hinge pin (821), the lower end of the right connecting rod (82) is hinged with one end of the right angle adjuster fixing plate hinged connecting rod (83) through a right connecting rod lower hinge pin (822), the other end of the right angle adjuster fixing plate hinged connecting rod (83) is hinged with the right angle adjuster fixing plate (2) through a right angle adjuster fixing plate hinged connecting rod pin (831), the upper end of the right swing arm connecting rod (84) is hinged with the middle part of the leg bracket right fixing plate (85) through a right swing arm connecting rod hinge pin (841), and the lower end of the leg bracket right fixing plate (85) is formed as a leg bracket right fixing plate extension end (851) extending downward.

3. The leg rest adjustment device of claim 2, wherein: A swing arm parallel distance maintaining support (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 (10) is in the form of a hollow tubular body or a solid rod-shaped body.

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

5. The leg rest adjustment device of claim 4, wherein: The motor (61) is a direct current motor with forward and reverse rotation functions, and is electrically connected with a vehicle-mounted power supply.

6. The leg rest adjustment device of claim 3, wherein: The left end of the leg bracket (9) is fixed with the rear side of the leg bracket left fixed plate (75), and the right end of the leg bracket (9) is fixed with the rear side of the leg bracket right fixed plate (85).

7. The leg rest adjustment device of claim 4, wherein: A left angle adjuster corresponding hole (713) is formed in the upper end of the left swing arm (71), and a right angle adjuster corresponding hole (813) is formed in the upper end of the right swing arm (81), the left angle adjuster (3) is fixed with the left swing arm (71) at the position of the left angle adjuster corresponding hole (713), and the right angle adjuster (4) is fixed with the right swing arm (81) at the position of the right angle adjuster corresponding hole (813).

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

9. The leg rest adjustment device of claim 8, wherein: A fixed tooth disc fixed let hole (11) is opened in the upper end of the left angle adjuster fixed plate (1) and at the position corresponding to the left angle adjuster corresponding hole (713), fixed tooth disc positioning boss holes (12) are opened in the circumferential direction around the fixed tooth disc fixed let hole (11) in a spaced state, fixed tooth disc positioning boss (333) are formed on the right side of the fixed tooth disc (33) and at the position corresponding to the fixed tooth disc positioning boss holes (12), the fixed tooth disc positioning boss (333) is fixed with the upper end of the left angle adjuster fixed plate (1) at the position corresponding to the fixed tooth disc positioning boss holes (12); the transmission shaft connecting hole (6211) and the transmission shaft transmission connecting hole (3511) are spline holes, the transmission shaft (5) is a spline shaft and is spline transmission connected with the transmission shaft connecting hole (6211) and the transmission shaft transmission connecting hole (3511); the number of teeth constituting the fixed tooth disc inner ring gear (3311) is one more than the number of teeth constituting the swing arm drive tooth disc inner ring gear (3211), and the inner diameter of the fixed tooth disc cavity (331) is smaller than the inner diameter of the swing arm drive tooth disc cavity (321); the cross-sectional shape of the sleeve (31) is in the shape of a ┐.

10. An automotive seat characterized by Leg rest adjustment device as claimed in claim 1.

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