Rear footrest structure of car seat

Abstract

A rear row foot support structure of an automobile seat belongs to the technical field of automobile seats. The automobile seat comprises a left side plate and a right side plate of a seat back frame, the upper ends of the left and right side plates of the seat back frame are connected by a headrest guide sleeve pipe fixed pipe on the side facing each other, and the lower ends are connected by an angle adjuster drive shaft; the rear row foot support structure comprises a foot support assembly, which is arranged between the lower ends of the left and right side plates of the seat back frame on the side facing each other at a position corresponding to the middle part of the angle adjuster drive shaft, and is characterized in that: the rear row foot support structure further comprises a foot support assembly automatic drive mechanism, which is arranged at the lower end of the left side plate of the seat back frame on the side facing the right side plate of the seat back frame or at the lower end of the right side plate of the seat back frame on the side facing the left side plate of the seat back frame, and is in transmission connection with the foot support assembly. Advantage: good automation effect, meeting the experience requirements of the seat occupant, avoiding noise during the foot support turnover process, achieving stepless adjustment at any position within the stroke range, and saving space occupation.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology, specifically relating to a rear footrest structure for automotive seats. Background Technology

[0002] The aforementioned rear footrest structure can also be called a rear passenger footrest device, rear footrest, or rear passenger footrest device, etc. It is located under the front passenger seat for passengers in the rear to rest their feet. From the perspectives of comfort and ergonomics, rear seat footrests offer at least the following advantages: improved posture and reduced fatigue, as they provide effective support for the thighs and reduce the static muscle tension required for maintaining posture; significantly reduced leg and lower back soreness and fatigue during long journeys; improved blood circulation, as elevating the feet facilitates blood return to the heart from the lower limbs, reducing the risk of leg swelling, which is especially beneficial for elderly passengers or those with poor circulatory systems on long trips; evenly distributed body weight across the thighs and buttocks, reducing pressure on the sitting area; enhanced "enveloping" and "immersive" feeling, improving overall seat comfort; accommodated diverse resting postures; met the individual needs of passengers of different body types, providing a tailor-made comfort experience; enhanced seating stability, as improved thigh support helps to keep the passenger's body relatively stable in the seat; reduced lateral sliding and swaying during vehicle turns or bumps, improving dynamic ride stability, and so on. Perhaps due to advantages beyond those mentioned above, rear legroom is a common feature in tour buses and sedans. Typical examples of sedans include: Rolls-Royce Phantom / Ghost, Mercedes-Maybach S-Class, Bentley Flying Spur / Mulsanne, Audi A8L Horch, high-end luxury MPVs, Toyota Alphard / Vellfire, Lexus LM, GAC Trumpchi M8, NIO ET7 / ES8, high-end Hiphi X / Z, and Mercedes-Benz SQS SUV / BMW 17, and many more.

[0003] Existing automotive rear footrests are still mostly manual, such as pull-out or flip-up types, and are primarily operated by the passenger using their foot to hook it or by bending over and operating it directly with their hand. This physical operation structure can be categorized as non-electric or non-automatic, and has the following disadvantages: First, it fails to provide ease of use and does not meet the user's expected experience, as the process of hooking it with the foot, bending over and reaching to pull or flip it, and even the necessary unlocking, is cumbersome and inconvenient in the relatively confined space of a car, and also results in dirt getting on hands or clothing; second, the manual mechanical operation is accompanied by clicking and friction noises, giving it a tool-like feel; third, it cannot achieve the desired stepless adjustment, meaning it cannot be stopped arbitrarily within the entire range of travel; fourth, because a certain amount of operating space is required, it affects the flatness of the folded-down surface or occupies more space; fifth, there is a risk of injury to the passenger's limbs during operation; and sixth, it is incompatible with the high-end and intelligent features of vehicles. Utility Model Content

[0004] The purpose of this invention is to provide a rear footrest structure for car seats that helps to achieve the desired automation effect, meets the experience requirements expected by passengers, avoids noise during footrest flipping, achieves stepless adjustment at any position within the travel range, effectively reflects miniaturization to save space, is easy to operate and control, and is compatible with the high-end and intelligent features of vehicles.

[0005] The present invention achieves its objective as follows: a rear footrest structure for a car seat, wherein the car seat includes a left side panel and a right side panel of a backrest frame. The upper ends of the left and right side panels are connected to each other by a headrest guide sleeve fixing tube, and the lower ends of the left and right side panels are connected by an adjuster drive shaft. The left end of the adjuster drive shaft is connected to a left adjuster located at the lower end of the left side panel, and the right end of the adjuster drive shaft is connected to a right adjuster located at the lower end of the right side panel, corresponding to the left adjuster. The rear footrest structure includes a footrest assembly. The footrest assembly is positioned at the middle of the center of the angle adjuster drive shaft, between the lower ends of the left side panel and the right side panel of the seat back frame facing each other. The rear footrest structure further includes an automatic drive mechanism for automatically deploying the footrest assembly to a position for rear passengers to support their feet or returning it to a non-use position. This automatic drive mechanism is located at the lower end of either the left side panel facing the right side panel or the right side panel facing the left side panel, and is connected in a transmission manner to the footrest assembly.

[0006] In a specific embodiment of this utility model, a left side panel cavity is formed on the side of the left side panel of the backrest frame facing the right side panel of the backrest frame, and a right side panel cavity is formed on the side of the right side panel of the backrest frame facing the left side panel of the backrest frame. An automatic drive mechanism for driving the footrest assembly to automatically unfold to a state for rear passengers to support their feet or return to a non-use state is located at the lower end of either the left side panel cavity or the lower end of the right side panel cavity of the backrest frame.

[0007] In another specific embodiment of this utility model, the automatic drive mechanism of the footrest assembly is disposed at the lower end of the left side plate cavity of the chair back frame. This automatic drive mechanism includes a drive motor, a drive reduction gearbox, a reduction gearbox fixing plate, a drive reduction gearbox final stage power output shaft connecting gear, and a sector gear plate. The drive motor and the drive reduction gearbox are in transmission cooperation, and the drive reduction gearbox, together with the drive motor, is fixed to the left side of the reduction gearbox fixing plate at a position corresponding to the lower end of the left side plate cavity of the chair back frame. The upper part of the reduction gearbox fixing plate is disposed on the left side of the chair back frame. The gearbox mounting plate is fixed on the plate. The final stage power output shaft of the drive gearbox faces to the right and extends to the right side of the gearbox mounting plate. The connecting gear of the final stage power output shaft of the drive gearbox is located in the middle of the gear shaft and on the right side of the gearbox mounting plate. The left end of the gear shaft is fixedly connected to the final stage power output shaft of the drive gearbox or forms an integral structure. The right end of the gear shaft is rotatably supported on the foot support assembly. The sector tooth plate is fixed to the left end of the foot support assembly, and the sector tooth plate teeth on the sector tooth plate mesh with the connecting gear of the final stage power output shaft of the drive gearbox.

[0008] In another specific embodiment of this utility model, the drive motor is a permanent magnet brushed DC geared motor or a micro DC geared motor with forward and reverse rotation functions.

[0009] In another specific embodiment of this utility model, the footrest assembly includes a footrest arm fixing shaft, a left fixing shaft bracket, a right fixing shaft bracket, a left footrest arm, a right footrest arm, a bracket, a first torsion spring, a second torsion spring, and a footrest. The left fixing shaft bracket corresponds to the right side of the gearbox fixing plate, and the space between the left fixing shaft bracket and the opposite side of the gearbox fixing plate forms a gear transmission cavity. The lower end of the left fixing shaft bracket is pivotally mounted on the left end of the footrest arm fixing shaft. The right end of the gear shaft is rotatably supported in the middle of the left fixing shaft bracket, and the upper part of the left fixing shaft bracket... The upper end of the footrest arm fixing shaft is fixed to the gearbox fixing plate. The left end of the footrest arm fixing shaft extends to the left side of the left bracket of the fixing shaft and is connected to the sector toothed plate. The right end of the footrest arm fixing shaft is rotatably supported on the lower front end of the right bracket of the fixing shaft and extends to the right side of the right bracket of the fixing shaft. The upper front end of the right bracket of the fixing shaft is fixed to the front side of the right side plate of the chair back frame. The rear end of the right bracket of the fixing shaft is fixed to the rear side of the right side plate of the chair back frame through a connecting plate connected to it. The rear end of the left arm of the footrest is fitted onto the footrest at a position corresponding to the right side of the left bracket of the fixing shaft. At the left end of the plate arm fixing shaft, the front end of the left arm of the foot plate extends into a foot plate left fixing forearm with a narrowed diameter. The rear end of the right arm of the foot plate is fixed to the right end of the foot plate arm fixing shaft at a position corresponding to the left side of the right bracket of the fixing shaft. The front end of the right arm of the foot plate extends into a foot plate right fixing forearm with a narrowed diameter. The bracket corresponds to the lower part of the angle adjuster drive shaft along its length direction, and the left end of the bracket is fixedly connected to the front of the lower end of the left bracket of the fixing shaft, while the right end of the bracket is fixedly connected to the lower part of the front end of the right bracket of the fixing shaft. The first torsion spring corresponds to... The left arm of the foot support plate is fitted onto the foot support plate arm fixing shaft at the rear right side. The first torsion spring is hooked at the rear right side of the left arm of the foot support plate, and the second torsion spring is hooked at the front middle side of the bracket. The second torsion spring is fitted onto the foot support plate arm fixing shaft at the left side corresponding to the right arm of the foot support plate. The first positioning foot of the second torsion spring is hooked at the rear left side of the right arm of the foot support plate, and the second positioning foot of the second torsion spring is hooked at the front middle side of the bracket. The foot support plate is fixed between the left and right fixing arms of the foot support plate.

[0010] In another specific embodiment of this utility model, a fixed shaft connecting head hole is provided at the lower end of the sector-shaped toothed plate and at the position corresponding to the left end of the foot support arm fixing shaft; a toothed plate limiting pin screw sliding sleeve hole is provided in front of the lower end of the gearbox fixing plate and at the position corresponding to the fixed shaft connecting head hole, a toothed plate limiting pin screw bushing is provided in the toothed plate limiting pin screw sliding sleeve hole, and a toothed plate limiting pin screw is fitted in the toothed plate limiting pin screw bushing; a fixed shaft left bracket pivot support hole with a bushing is provided in front of the lower end of the fixed shaft left bracket, and the foot support arm fixing shaft The left end of the foot support arm is pivotally engaged with the pivot support hole of the left fixed shaft bracket via the bushing. The left end of the foot support arm fixed shaft extends to the left side of the left fixed shaft bracket and extends to a fixed shaft connector. The left end of the foot support arm fixed shaft is fixed to the sector toothed plate by inserting the fixed shaft connector hole into the fixed shaft connector hole. The toothed plate retaining pin screw is screwed into the left end face of the fixed shaft connector for limitation. A gear shaft head pivot support hole is opened in the middle of the left fixed shaft bracket. A shaft head support bearing is provided in the gear shaft head pivot support hole. The right end of the gear shaft is rotatably engaged with the shaft head support bearing. A right support pivot hole is formed at the lower front end of the bracket, corresponding to the right end of the foot support arm fixing shaft. A right support pivot support bushing is embedded in this hole. The right end of the foot support arm fixing shaft rotatably engages with the right support pivot support bushing. The right end of the foot support arm fixing shaft extends to the right side of the right support. A right support fixing ear is formed by folding down the upper front end of the right support. A right support fixing ear connecting piece is fixed in front of this fixing ear by a right support fixing ear connecting piece fixing screw. Furthermore, the right end of the right bracket fixing ear connecting piece is fixed to the front side of the right side panel of the chair back frame by the right bracket fixing ear connecting piece screw. At the rear end of the right bracket of the fixed shaft, there is a fixed shaft right bracket upper connecting arm and a fixed shaft right bracket lower connecting arm. The fixed shaft right bracket upper connecting arm and the fixed shaft right bracket lower connecting arm are each fixed to the left end of the fixed shaft right bracket connecting plate by connecting arm screws. A pair of connecting plate fixing screw holes are opened at the right end of the fixed shaft right bracket connecting plate. The right end of the fixed shaft right bracket connecting plate is fixed to the rear side of the right side panel of the chair back frame by the connecting plate fixing screws at the positions corresponding to the pair of connecting plate fixing screw holes.

[0011] In a further specific embodiment of this utility model, the upper end of the gearbox fixing plate is fixed to the upper end of the left support of the fixed shaft by a pair of gearbox fixing plate screws and is limited by a gearbox fixing plate screw limiting nut located on the right side of the left support of the fixed shaft and screwed onto the right end of the pair of gearbox fixing plate screws; an arc-shaped guide groove penetrating the thickness direction of the sector tooth plate is formed in the middle of the sector tooth plate; a sector plate front-back swing guide limiting screw shaft is provided on the left support of the fixed shaft at a position corresponding to the arc-shaped guide groove, and the left end of the sector plate front-back swing guide limiting screw shaft extends into the arc-shaped guide groove.

[0012] In a further specific embodiment of this utility model, the gearbox fixing plate connecting device includes a front connecting plate for the gearbox fixing plate and a pair of rear connecting plates for the gearbox fixing plate. The front connecting plate for the gearbox fixing plate corresponds to the upper front end of the gearbox fixing plate. The left end of the front connecting plate for the gearbox fixing plate is fixed to the front side of the left side panel of the chair back frame by a left fixing screw. The right end of the front connecting plate for the gearbox fixing plate protrudes to the right front side of the left side panel of the chair back frame. The pair of rear connecting plates for the gearbox fixing plate are vertically aligned with each other and correspond to the rear side of the gearbox fixing plate. The left ends of each pair of rear connecting plates for the gearbox fixing plate are connected by a rear connecting plate for the gearbox fixing plate. The left fixing screw is fixed to the rear side of the left side panel of the chair back frame, while the right end of the pair of gearbox fixing plate rear connecting plates protrudes from the rear right side of the left side panel of the chair back frame. A gearbox fixing plate front connecting lug is folded to the right at the upper front end of the gearbox fixing plate. The gearbox fixing plate front connecting lug is fixed to the right end of the gearbox fixing plate front connecting plate by a gearbox fixing plate front connecting lug fixing screw. At the rear end of the gearbox fixing plate and at the position corresponding to the right end of the pair of gearbox fixing plate rear connecting plates, a pair of gearbox fixing plate rear connecting lugs are folded to the left. Each of the pair of gearbox fixing plate rear connecting lugs is fixed to the pair of gearbox fixing plate rear connecting plates by a gearbox fixing plate rear connecting lug fixing screw.

[0013] In another specific embodiment of this utility model, a torsion spring first foot hook hole is provided at the rear end of the left arm of the foot plate and at the position corresponding to the first torsion spring first foot. A torsion spring second foot hook seat is formed at the middle of the front side of the bracket and at the position corresponding to the second torsion spring second foot. The first torsion spring foot is hooked in the torsion spring first foot hook hole, and the second torsion spring foot is hooked on the torsion spring second foot hook seat. A torsion spring second foot hook hole is provided at the rear end of the right arm of the foot plate and at the position corresponding to the second torsion spring first positioning foot of the second torsion spring. A torsion spring second positioning foot hook seat is formed at the middle of the front side of the bracket and at the position corresponding to the second torsion spring second positioning foot of the second torsion spring. The second torsion spring first positioning foot of the second torsion spring is hooked in the torsion spring second foot hook hole, and the second torsion spring second positioning foot is hooked on the torsion spring second positioning foot hook seat. The rear ends of the left and right arms of the foot plate each form a Z-shaped structure.

[0014] In another specific embodiment of this utility model, a bracket fixing connecting foot is formed by folding to the right at the lower front side of the left connecting bracket of the fixed shaft and at a position corresponding to the left end of the bracket. The bracket fixing connecting foot is fixedly connected to the left end of the bracket by a bracket fixing connecting foot screw. A bracket fixing connecting ear is formed by folding to the left at the lower front end of the right bracket of the fixed shaft and at a position corresponding to the pivot support hole of the right bracket of the fixed shaft. The bracket fixing connecting ear is fixedly connected to the right end of the bracket by a bracket fixing connecting ear screw.

[0015] The technical advantages of the present invention are as follows: Because it employs an automatic drive mechanism that allows the footrest assembly to automatically unfold to a position for rear passengers to rest their feet or return to a non-use position, it helps to achieve an ideal automation effect, thus meeting the expected experience requirements of passengers; it avoids noise during footrest flipping; it enables stepless adjustment at any position within the travel range; and it achieves miniaturization, saving space. Since the automatic drive mechanism is electrically operated and controlled, it is very convenient to operate and adapts to the high-end and intelligent features of vehicles. Attached Figure Description

[0016] Figure 1 This is a structural diagram of one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram showing the left side of the right side panel of the chair back frame; Figure 3 for Figure 1 The detailed structural diagram of the gearbox mounting plate is shown. Figure 4This is a schematic diagram of the footrest assembly in the unfolded state during use. Figure 5 for Figure 4 The diagram shows the footrest assembly in a non-use state after returning to its original position.

[0017] In the diagram: 1. Left side panel of the chair back frame; 11. Left angle adjuster; 12. Left side panel cavity of the chair back frame; 13. Gearbox fixing plate connecting device; 131. Front connecting plate of the gearbox fixing plate; 132. Rear connecting plate of the gearbox fixing plate; 2. Right side panel of the chair back frame; 21. Right angle adjuster; 22. Right side panel cavity of the chair back frame; 3. Headrest guide sleeve fixing tube; 31. Headrest insert connecting tube; 32. Left bending arm; 321. Left bending arm fixing hole; 33. Right bending arm; 331. Right bending arm fixing hole; 4. Adjuster drive shaft; 5. Footrest assembly; 51. Footrest arm fixing shaft; 511. Fixing shaft connector; 52. Left bracket of the fixing shaft; 521. Pivot support hole of the left bracket of the fixing shaft; 522. Gear shaft head pivot support hole; 523. 524. Gear plate transmission cavity; 525. Sector plate front and rear swing guide limit screw shaft; 526. Bracket fixing connecting foot; 5251. Bracket fixing connecting foot screw; 53. Right bracket of fixed shaft; 531. Right bracket connecting plate of fixed shaft; 5311. Connecting plate fixing screw hole; 53111. Connecting plate fixing screw; 532. Right bracket pivot support hole of fixed shaft; 5321. Right bracket pivot support hole bushing; 533. Right bracket fixing ear; 5331. Right bracket fixing ear connecting piece fixing screw; 5332. Right bracket fixing ear connecting piece; 53321. Right bracket fixing ear connecting piece screw; 534. Upper connecting arm of right bracket of fixed shaft; 535. Lower connecting arm of right bracket of fixed shaft; 536. Connecting arm screw; 537. Bracket fixing connecting ear; 5371. Bracket fixing connecting ear screw; 54. 541. Left fixed arm of foot support plate; 542. First foot hook hole of torsion spring; 55. Right arm of foot support plate; 551. Right fixed arm of foot support plate; 552. Second foot hook hole of torsion spring; 56. Bracket; 561. Second foot hook seat of torsion spring; 562. Second positioning foot hook seat of torsion spring; 563. Bracket cavity; 57. First torsion spring; 571. First foot of torsion spring; 572. Second foot of torsion spring; 58. Second torsion spring; 581. First positioning foot of second torsion spring; 582. Second positioning foot of second torsion spring; 59. Foot support plate; 6. Automatic drive mechanism for foot support assembly; 61. Drive motor; 62. Drive reduction gearbox; 63. Reduction gearbox fixing plate; 631. Sliding sleeve hole of toothed plate limiting pin screw; 6311. Gear plate retaining pin screw bushing, 63111. Gear plate retaining pin screw, 632. Gearbox mounting plate screw, 6321. Gearbox mounting plate screw retaining nut, 633. Gearbox mounting plate front connecting lug, 6331. Gearbox mounting plate front connecting lug fixing screw, 634. Gearbox mounting plate rear connecting lug, 635. Drive gear shaft clearance hole, 636. Gearbox fixing screw through hole, 637. Gearbox housing fixing screw hole, 64.The drive reduction gearbox's final stage power output shaft connects to the gear, 641. Gear shaft, 65. Sector gear plate, 651. Sector gear plate teeth, 652. Arc-shaped guide groove, 653. Fixed shaft connecting head hole. Detailed Implementation

[0018] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0019] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0020] Please see Figure 1 The diagram illustrates a car seat structure system comprising a left backrest frame 1 and a right backrest frame 2 that are longitudinally parallel to each other. The upper ends of the left and right backrest frames 1 and 2 are connected to each other on opposite sides by a headrest guide tube fixing tube 3, while the lower ends of the left and right backrest frames 1 and 2 are connected by an adjuster drive shaft 4. The left end of the adjuster drive shaft 4 is connected to a left adjuster 11 located at the lower end of the left backrest frame 1, and the right end of the adjuster drive shaft 4 is connected to a right adjuster 21 located at the lower end of the right backrest frame 2, corresponding to the left adjuster 11. The diagram also illustrates a rear footrest assembly 5, which is positioned at the midpoint of the aforementioned adjuster drive shaft 4 between the lower ends of the left backrest frame 1 and the right backrest frame 2 on opposite sides.

[0021] The key technical points of the technical solution provided by this utility model are as follows: the aforementioned rear footrest structure system also includes an automatic footrest assembly drive mechanism 6 for automatically unfolding the footrest assembly 5 to a usage state for rear passengers (also referred to as "passengers", the same below) to support their feet or returning it to a non-use state. The automatic footrest assembly drive mechanism 6 is located at the lower end of the left side plate 1 of the aforementioned seat back frame facing the right side plate 2 of the seat back frame, or it can be located at the lower end of the right side plate 2 of the seat back frame facing the left side plate 1 of the seat back frame, and is connected to the aforementioned footrest assembly 5 in a transmission manner.

[0022] exist Figure 1The figure also shows a pair of headrest insert connecting tubes 31 fixed to the headrest guide sleeve fixing tube 3. These headrest insert connecting tubes 31 are clearly for fitting into a pair of inserts (also referred to as "pins") of the headrest (not shown in the figure). Furthermore, the left-hand bent arm 32 at the left end of the headrest guide sleeve fixing tube 3 fits into the upper end of the left side panel cavity 12 of the left side panel 1 of the backrest frame and is fixed to the left side panel 1 of the backrest frame through the left-hand bent arm fixing hole 321 at its upper (lower) end. The right-hand bent arm 33 at the right end of the headrest guide sleeve fixing tube 3 fits into the upper end of the right side panel cavity 22 of the right side panel 2 of the backrest frame and is fixed to the right side panel 2 of the backrest frame through the right-hand bent arm fixing hole 331 at its upper (lower) end.

[0023] Figure 1 The left adjuster 11, shown in the diagram and mentioned above, is fixed to the lower left side of the left side panel 1 of the chair back frame by screws, while the right adjuster 12 is fixed to the lower right side of the right side panel 2 of the chair back frame by screws. The left and right ends of the aforementioned adjuster drive shaft 4 extend to the left and right sides of the left and right side panels 1 and 2 of the chair back frame, respectively, and are rotatably connected to the left and right adjusters 11 and 12. Since the structure or working principle of the left and right adjusters 11 and 12 and the adjuster drive shaft 4 are known technologies and can be found extensively in published Chinese and foreign patent documents, the applicant will not elaborate further. In addition, since the mode of driving the movement (rotation) of the adjuster drive shaft 4 can be either electric (as in this embodiment) or manual, it is not necessary to specifically limit it in this utility model. The left and right angle adjusters 11 and 12 are driven by the angle adjuster drive shaft 4. Since the moving parts of the structural system of the left and right angle adjusters 11 and 12, such as the moving gear plate, are fixed to the left and right side plates 1 and 2 of the chair back frame, the aforementioned moving parts, such as the moving gear plate, drive the left and right side plates 1 and 2 of the chair back frame to change their angle, such as tilting forward or tilting backward.

[0024] The aforementioned left side panel 1 of the chair back frame has a cavity 12, as mentioned above, along its height and facing the right side panel 2. Similarly, the right side panel 2 has a cavity 22, also mentioned above, along its height and facing the left side panel 1. An automatic drive mechanism 6 for automatically extending the footrest assembly 5 to a position for rear passengers to rest their feet or returning it to a non-use position is located at the lower end of either the left side panel cavity 12 or the lower end of the right side panel cavity 22. This embodiment uses the former, which will be explained in more detail below. Of course, if the latter is chosen and the positions of related components are adapted, it should be considered an equivalent technical means and still fall within the scope of the technical content disclosed in this utility model.

[0025] As mentioned above, the aforementioned footrest assembly automatic drive mechanism 6 is located at the lower end of the aforementioned left side plate cavity 12 of the aforementioned chair back frame left side plate 1. This automatic drive mechanism 6 includes a drive motor 61, a drive reduction gearbox 62, a reduction gearbox fixing plate 63, a drive reduction gearbox final stage power output shaft connecting gear 64, and a sector gear plate 65. The drive motor 61 is in transmission cooperation with the drive reduction gearbox 62, and the drive reduction gearbox 62, together with the drive motor 61, is fixed to the left side of the reduction gearbox fixing plate 63 at a position corresponding to the lower end of the aforementioned left side plate cavity 12 of the chair back frame. The upper part of the reduction gearbox fixing plate 63 is fixed to the reduction gearbox fixing plate connecting device 13 located on the left side plate 1 of the chair back frame. The final stage power output of the drive reduction gearbox 62... The shaft faces right and the drive gear shaft clearance hole 635 on the gearbox mounting plate 63 extends to the right side of the gearbox mounting plate 63. The drive gearbox final stage power output shaft connecting gear 64 is formed in the middle of the gear shaft 641 and located on the right side of the gearbox mounting plate 63. In this embodiment, the left end of the gear shaft 641 is fixedly connected to the drive gearbox final stage power output shaft through a component such as a coupling. Of course, the gear shaft 641 and the gearbox final stage power output shaft can also be integrated into one structure. The right end of the gear shaft 641 is rotatably supported on the aforementioned foot support assembly 5. The sector tooth plate 65 is fixed to the left end of the foot support assembly 5, and the sector tooth plate teeth 651 on the sector tooth plate 65 mesh with the drive gearbox final stage power output shaft connecting gear 64.

[0026] In this embodiment, the aforementioned drive motor 61 is a permanent magnet brushed DC geared motor or a micro DC geared motor with forward and reverse rotation functions (the latter is selected in this embodiment).

[0027] Please stay tuned. Figure 1The aforementioned footrest assembly 5 includes a footrest arm fixing shaft 51, a left fixing shaft bracket 52, a right fixing shaft bracket 53, a left footrest arm 54, a right footrest arm 55, a bracket 56, a first torsion spring 57, a second torsion spring 58, and a footrest 59. The left fixing shaft bracket 52 corresponds to the right side of the aforementioned gearbox fixing plate 63, and the space between the left fixing shaft bracket 52 and the opposite side of the gearbox fixing plate 63 forms a gear tooth transmission cavity 523. The lower end of the left fixing shaft bracket 52 is pivotally (i.e., "rotatably mounted," hereinafter similar terms are used interchangeably) at the left end of the footrest arm fixing shaft 51. The right end of the aforementioned gear shaft 641 is rotatably supported in the middle of the left fixing shaft bracket 52. The upper part of the frame 52 is fixed to the upper end of the gearbox fixing plate 63. The left end of the foot support arm fixing shaft 51 extends to the left side of the left support bracket 52 and is connected to the aforementioned sector tooth plate 65. The right end of the foot support arm fixing shaft 51 is rotatably supported on the lower front end of the right support bracket 53 and extends to the right side of the right support bracket 53. The upper front end of the right support bracket 53 is fixed to the front side of the right side plate 2 of the chair back frame. The rear end of the right support bracket 53 is fixed to the rear side of the right side plate 2 of the chair back frame through the right support bracket connecting plate 531 connected to it. The rear end of the left arm 54 of the foot support is sleeved on the right side of the aforementioned foot support arm fixing plate at the position corresponding to the right side of the aforementioned left support bracket 52. At the left end of shaft 51, the front end of the left arm 54 of the foot support extends into a foot support left fixing arm 541 with its diameter narrowed. The rear end of the right arm 55 of the foot support is fixed to the right end of the aforementioned foot support arm fixing shaft 51 at a position corresponding to the left side of the aforementioned right bracket 53 of the fixing shaft. The front end of the right arm 55 of the foot support extends into a foot support right fixing arm 551 with its diameter narrowed. The bracket 56 is located below the aforementioned angle adjuster drive shaft 4 in the longitudinal direction, and the left end of the bracket 56 is fixedly connected to the front of the lower end of the aforementioned left bracket 52 of the fixing shaft, while the right end of the bracket 56 is fixedly connected to the lower front end of the aforementioned right bracket 53 of the fixing shaft. The first torsion spring 57 is located corresponding to the aforementioned left arm 54 of the foot support. The rear right side is fitted onto the aforementioned foot support arm fixing shaft 51. The first torsion spring 57's first torsion spring foot 57's first foot 571 is hooked onto the rear right side of the aforementioned foot support left arm 54, while the first torsion spring 57's second foot 572 is hooked onto the middle front side of the aforementioned bracket 56. The second torsion spring 58 is fitted onto the aforementioned foot support arm fixing shaft 51 at the position corresponding to the left side of the aforementioned foot support right arm 55. The second torsion spring 58's second torsion spring foot 58's first positioning foot 581 is hooked onto the rear left side of the aforementioned foot support right arm 55, while the second torsion spring 58's second positioning foot 582 is hooked onto the middle front side of the bracket 56. The foot support 59 is fixed between the aforementioned foot support left and right fixing arms 541 and 551.

[0028] Please see Figures 2 to 3 And combined Figure 1A fixing shaft connecting head hole 653 is provided at the lower end of the aforementioned fan-shaped toothed plate 65 and at the position corresponding to the left end of the foot plate arm fixing shaft 51; a toothed plate limiting pin screw sliding sleeve hole 631 is provided in front of the lower end of the aforementioned gearbox fixing plate 63 and at the position corresponding to the aforementioned fixing shaft connecting head hole 653, a toothed plate limiting pin screw bushing 6311 is provided in the toothed plate limiting pin screw bushing 6311, and a toothed plate limiting pin screw 63111 is disposed in the toothed plate limiting pin screw bushing 6311; at the aforementioned left bracket of the fixing shaft 52 A pivot support hole 521 for the left support bracket of the fixed shaft with a bushing is provided at the lower front end. The left end of the aforementioned foot support arm fixed shaft 51 is pivotally engaged with the pivot support hole 521 of the fixed shaft left bracket through the aforementioned bushing. The left end of the foot support arm fixed shaft 51 extends to the left side of the fixed shaft left bracket 52 and extends to a fixed shaft connector 511. The fixed shaft connector 511 is inserted into the aforementioned fixed shaft connector hole 653 to fix the left end of the foot support arm fixed shaft 51 to the aforementioned sector toothed plate 65. The aforementioned toothed plate limiting pin screw 63111 is screwed into the fixed shaft connector 511. The left end face of 11 is defined, and a gear shaft pivot support hole 522 is opened in the middle of the left support 52 of the fixed shaft. A shaft support bearing is installed in the gear shaft pivot support hole 522. The right end of the aforementioned gear shaft 641 is rotatably engaged with the aforementioned shaft support bearing. A right support pivot support hole 532 is opened at the lower front end of the right support 53 of the fixed shaft and at the position corresponding to the right end of the aforementioned foot plate arm fixed shaft 51. A right support pivot support hole bushing 5321 is embedded in the right support pivot support hole 532. The aforementioned foot plate arm fixed The right end of shaft 51 is rotatably engaged with the aforementioned right bracket pivot support hole bushing 5321, and the right end of the foot plate arm fixing shaft 51 extends to the right side of the fixing shaft right bracket 53. A fixing ear 533 is formed by folding down the upper part of the front end of the fixing shaft right bracket 53. A right bracket fixing ear connecting piece 5332 is fixed at a position corresponding to the front of the fixing ear 533 by a right bracket fixing ear connecting piece fixing screw 5331, and the right end of the right bracket fixing ear connecting piece 5332 is fixed by the right bracket fixing ear connecting piece screw 53321 (…). Figure 1 (As shown) is fixed to the front side of the aforementioned right side panel 2 of the chair back frame. At the rear end of the right support bracket 53, there is an upper connecting arm 534 and a lower connecting arm 535. The upper connecting arm 534 and the lower connecting arm 535 are each fixed to the left end of the aforementioned right support bracket connecting plate 531 by connecting arm screws 536. The right end of the right support bracket connecting plate 531 has a pair of connecting plate fixing screw holes 5311, which are connected by connecting plate fixing screws 53111 (…). Figure 2(See illustration) Fix the right end of the right bracket connecting plate 531 of the fixing shaft to the rear side of the aforementioned right side plate 2 of the chair back frame at the position corresponding to the pair of connecting plate fixing screw holes 5311.

[0029] The upper end of the aforementioned gearbox fixing plate 63 is fixed to the upper end of the aforementioned fixed shaft left bracket 52 by a pair of gearbox fixing plate screws 632 and is limited by a gearbox fixing plate screw limiting nut 6321 located on the right side of the fixed shaft left bracket 52 and screwed onto the right end of the pair of gearbox fixing plate screws 632; an arc-shaped guide groove 652 is provided on the aforementioned sector toothed plate 65 and in the middle of the sector toothed plate 65, penetrating through the thickness direction of the sector toothed plate 65, that is, from the left side to the right side of the sector toothed plate 65; a sector plate front and back swing guide limiting screw shaft 524 is provided on the aforementioned fixed shaft left bracket 52 and at the position corresponding to the arc-shaped guide groove 652, and the left end of the sector plate front and back swing guide limiting screw shaft 524 extends into the arc-shaped guide groove 652.

[0030] Based on the above explanation and in combination Figure 1 As can be seen from the diagram, the aforementioned gearbox fixing plate 63 and the left bracket 52 of the fixing shaft essentially constitute a transmission box or gearbox structure, and the aforementioned gear tooth plate transmission cavity 523 is essentially a transmission box cavity or gearbox cavity.

[0031] Depend on Figure 3 As shown, a gearbox fixing screw through hole 636 is provided at the upper end of the aforementioned gearbox fixing plate 63 for the right end of the aforementioned pair of gearbox fixing screws 632 to pass through, and a gearbox housing fixing screw hole 637 for fixing the housing of the drive gearbox 62 is also shown.

[0032] Depend on Figure 1As shown, the aforementioned gearbox fixing plate connecting device 13 includes a gearbox fixing plate front connecting plate 131 and a pair of gearbox fixing plate rear connecting plates 132. The gearbox fixing plate front connecting plate 131 corresponds to the upper front end of the aforementioned gearbox fixing plate 63. The left end of the gearbox fixing plate front connecting plate 131 is fixed to the front side of the aforementioned chair back frame left side plate 1 by a gearbox fixing plate front connecting plate left fixing screw, while the right end of the gearbox fixing plate front connecting plate 131 protrudes to the right front side of the chair back frame left side plate 1. The pair of gearbox fixing plate rear connecting plates 132 are vertically aligned with each other and correspond to the rear side of the aforementioned gearbox fixing plate 63. The left ends of each of the pair of gearbox fixing plate rear connecting plates 132 are fixed to the left side of the chair back frame by a gearbox fixing plate rear connecting plate left fixing screw. The rear side of the side panel 1 is fixed, and the right end of the pair of gearbox fixing plate rear connecting plates 132 protrudes from the rear right side of the left side panel 1 of the chair back frame. A gearbox fixing plate front connecting ear 633 is folded to the right at the upper front end of the aforementioned gearbox fixing plate 63. The gearbox fixing plate front connecting ear 633 is fixed to the right end of the aforementioned gearbox fixing plate front connecting plate 131 by a gearbox fixing plate front connecting ear fixing screw 6331. At the rear end of the gearbox fixing plate 63 and at the position corresponding to the right end of the pair of gearbox fixing plate rear connecting plates 132, a pair of gearbox fixing plate rear connecting ears 634 are folded to the left. Each of the pair of gearbox fixing plate rear connecting ears 634 is fixed to the aforementioned pair of gearbox fixing plate rear connecting plates 132 by a gearbox fixing plate rear connecting ear fixing screw.

[0033] At the rear end of the aforementioned foot support left arm 54, and at the position corresponding to the first torsion spring 57's first torsion spring 57's first torsion spring 57's first torsion spring 57's first torsion spring 57's first torsion spring 57's first torsion spring 57's second ... A second torsion spring hook hole 552 is provided at the position of the first positioning foot 581 of the second torsion spring. A second torsion spring hook seat 562 is formed at the middle of the front side of the aforementioned bracket 56, corresponding to the position of the second positioning foot 582 of the second torsion spring 58. The first positioning foot 581 of the aforementioned second torsion spring 58 is hooked in the second hook hole 552, and the second positioning foot 582 is hooked on the second positioning foot hook seat 562. The rear ends of the left and right arms 54 and 55 of the aforementioned foot plate each form a Z-shaped structure.

[0034] Preferably, a bracket fixing connection foot 525 is formed by folding to the right at the lower front side of the aforementioned fixed shaft left connecting bracket 52 and at a position corresponding to the left end of the bracket 56. The bracket fixing connection foot 525 is fixedly connected to the left end of the bracket 56 by a bracket fixing connection foot screw 5251. A bracket fixing connection ear 537 is formed by folding to the left at the lower front end of the aforementioned fixed shaft right bracket 53 and at a position corresponding to the front of the fixed shaft right bracket pivot support hole 532. The bracket fixing connection ear 537 is fixedly connected to the right end of the aforementioned bracket 56 by a bracket fixing connection ear screw 5371.

[0035] To avoid interference, by Figure 1 As shown, the aforementioned bracket 56 has an upward-facing side and a bracket cavity 563 formed at a position corresponding to the aforementioned angle adjuster drive shaft 4.

[0036] Please see Figure 4 and Figure 5 The applicant describes the use of this utility model, when it is to be used by... Figure 5 The left and right arms 54 and 55 of the foot support plate, together with the foot support plate 59, which were in a retracted, non-use state, are now unfolded downwards and presented as shown. Figure 4 as well as Figure 1 In the indicated usage state, the passenger operates the touch switch or similar button or rotary switch of the controller, which is usually located on the armrest or other suitable location. The drive motor 61 operates clockwise, driving the drive reduction gearbox 62. The final stage power output shaft of the drive reduction gearbox 62 drives the gear shaft 641, causing the gear 64 connected to the final stage power output shaft of the drive reduction gearbox to rotate clockwise. This causes the sector tooth plate 65 to rotate counterclockwise. The sector tooth plate 65, through the fixed shaft connector 511 connected to its fixed shaft connector hole 653, drives the foot support arm fixed shaft 51 to also rotate counterclockwise. Overcoming the reaction force of the first and second torsion springs 57 and 58, the foot support arm fixed shaft 51 causes the left and right arms 54 and 55 of the foot support, along with the foot support 59, to flip and rotate. Figure 1 and Figure 4 The unfolded state shown (i.e., the usage state) can, of course, be flipped to a desired angle (not necessarily completely flipped to the desired angle). Figure 1 , Figure 4 (as shown in the diagram). Otherwise, it returns to the state indicated by... Figure 5 As shown, the torsional forces of the first and second torsion springs 57 and 58 cause the left and right arms 54 and 55 of the footrest, together with the footrest 59, to tend to rest against the lower part of the backrest of the front seat.

[0037] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A rear footrest structure for a car seat, the car seat comprising a left side panel (1) and a right side panel (2) of a backrest frame, the upper ends of the left and right side panels (1, 2) of the backrest frame facing each other are connected by a headrest guide sleeve fixing tube (3), and the lower ends of the left and right side panels (1, 2) of the backrest frame are connected by an adjuster drive shaft (4), the left end of the adjuster drive shaft (4) being connected to a left adjuster (4) disposed at the lower end of the left side panel (1) of the backrest frame. 11) Connection, and the right end of the angle adjuster drive shaft (4) is connected to the right angle adjuster (21) located at the lower end of the right side plate (2) of the backrest frame and corresponding to the left angle adjuster (11); the rear footrest structure includes a footrest assembly (5), which is located at the middle of the angle adjuster drive shaft (4) between the lower ends of the left side plate (1) of the backrest frame and the right side plate (2) of the backrest frame facing each other, characterized in that: The rear footrest structure also includes an automatic drive mechanism (6) for automatically unfolding the footrest assembly (5) to a state for rear passengers to rest their feet or returning it to a non-use state. The automatic drive mechanism (6) is located at the lower end of the left side plate (1) of the backrest frame facing the right side plate (2) of the backrest frame or at the lower end of the right side plate (2) of the backrest frame facing the left side plate (1) of the backrest frame, and is connected to the footrest assembly (5) in a transmission manner.

2. The rear footrest structure of the automobile seat according to claim 1, characterized in that: The left side panel (1) of the chair back frame has a left side panel cavity (12) in the height direction and facing the right side panel (2) of the chair back frame, and the right side panel cavity (22) of the chair back frame has a right side panel cavity (22) in the height direction and facing the left side panel (1) of the chair back frame. The automatic drive mechanism (6) for driving the footrest assembly (5) to automatically unfold to a state for rear passengers to support their feet or return to a non-use state is located at the lower end of the left side panel cavity (12) or the lower end of the right side panel cavity (22).

3. The rear footrest structure of the car seat according to claim 2, characterized in that: The automatic drive mechanism (6) of the footrest assembly is located at the lower end of the left side plate cavity (12) of the chair back frame on the left side plate (1) of the chair back frame. The automatic drive mechanism (6) of the footrest assembly includes a drive motor (61), a drive reduction gearbox (62), a reduction gearbox fixing plate (63), a drive reduction gearbox final stage power output shaft connecting gear (64), and a sector gear plate (65). The drive motor (61) is in transmission cooperation with the drive reduction gearbox (62), and the drive reduction gearbox (62) together with the drive motor (61) is fixed to the left side of the reduction gearbox fixing plate (63) at a position corresponding to the lower end of the left side plate cavity (12) of the chair back frame. The upper part of the reduction gearbox fixing plate (63) is connected to the reduction gearbox located on the left side plate (1) of the chair back frame. The fixed plate connecting device (13) is fixed, the final stage power output shaft of the drive gearbox (62) faces to the right and extends to the right side of the gearbox fixed plate (63), the final stage power output shaft connecting gear (64) of the drive gearbox is formed in the middle of the gear shaft (641) and is located on the right side of the gearbox fixed plate (63), the left end of the gear shaft (641) is fixedly connected to the final stage power output shaft of the drive gearbox or forms an integral structure, the right end of the gear shaft (641) is rotatably supported on the foot support assembly (5), the sector tooth plate (65) is fixed to the left end of the foot support assembly (5), and the sector tooth plate teeth (651) on the sector tooth plate (65) mesh with the final stage power output shaft connecting gear (64) of the drive gearbox.

4. The rear footrest structure of the automobile seat according to claim 3, characterized in that: The drive motor (61) is a permanent magnet brushed DC geared motor or a micro DC geared motor with forward and reverse rotation functions.

5. The rear footrest structure of the automobile seat according to claim 3, characterized in that: The footrest assembly (5) includes a footrest arm fixing shaft (51), a left fixing shaft bracket (52), a right fixing shaft bracket (53), a left footrest arm (54), a right footrest arm (55), a bracket (56), a first torsion spring (57), a second torsion spring (58), and a footrest (59). The left fixing shaft bracket (52) corresponds to the right side of the gearbox fixing plate (63), and the space between the left fixing shaft bracket (52) and the opposite side of the gearbox fixing plate (63) forms a gear tooth transmission cavity (523). The lower end of the left fixing shaft bracket (52) is pivotally mounted on the left end of the footrest arm fixing shaft (51), and the right end of the gear shaft (641) is rotatably supported on the left fixing shaft bracket (52). In the middle, the upper part of the fixed shaft left bracket (52) is fixed to the upper end of the gearbox fixing plate (63). The left end of the foot support arm fixing shaft (51) extends to the left side of the fixed shaft left bracket (52) and is connected to the sector tooth plate (65). The right end of the foot support arm fixing shaft (51) is rotatably supported on the lower front end of the fixed shaft right bracket (53) and extends to the right side of the fixed shaft right bracket (53). The upper front end of the fixed shaft right bracket (53) is fixed to the front side of the right side plate (2) of the chair back frame. The rear end of the fixed shaft right bracket (53) is fixed to the rear side of the right side plate (2) of the chair back frame through the fixed shaft right bracket connecting plate (531) connected to it. The rear end of the foot support left arm (54) is located at the corresponding position of the... The left support bracket (52) of the fixed shaft is fixed to the left end of the foot support arm fixed shaft (51) at the right side position. The front end of the left arm (54) of the foot support extends into a foot support left fixed small arm (541) with its diameter narrowed. The rear end of the right arm (55) of the foot support is fixed to the right end of the foot support arm fixed shaft (51) at the position corresponding to the left side of the right support bracket (53) of the fixed shaft. The front end of the right arm (55) of the foot support extends into a foot support right fixed small arm (551) with its diameter narrowed. The bracket (56) is located below the length direction of the angle adjuster drive shaft (4), and the left end of the bracket (56) is fixedly connected to the front of the lower end of the left support bracket (52) of the fixed shaft. The right end of the bracket (56) is located below the left end of the fixed shaft left support bracket (52). The end is fixedly connected to the lower front end of the right bracket (53) of the fixed shaft. The first torsion spring (57) is sleeved on the fixed shaft (51) of the foot support arm at the position corresponding to the right rear end of the left arm (54) of the foot support. The first torsion spring foot (571) of the first torsion spring (57) is hooked on the right rear end of the left arm (54) of the foot support, while the second torsion spring foot (572) of the first torsion spring (57) is hooked on the front side of the middle part of the bracket (56). The second torsion spring (58) is sleeved on the fixed shaft (51) of the foot support arm at the position corresponding to the left side of the right arm (55) of the foot support. The second torsion spring foot (581) of the second torsion spring (58) is hooked on the left rear end of the right arm (55) of the foot support.The second torsion spring (58) has its second torsion spring second positioning foot (582) hooked onto the front side of the middle part of the bracket (56), and the support plate (59) is fixed between the left and right fixing forearms (541, 551) of the support plate.

6. The rear footrest structure of the automobile seat according to claim 5, characterized in that: A fixing shaft connecting head hole (653) is provided at the lower end of the fan-shaped toothed plate (65) and at the left end corresponding to the foot plate arm fixing shaft (51); a toothed plate limiting pin screw sliding sleeve hole (631) is provided in front of the lower end of the gearbox fixing plate (63) and at the position corresponding to the fixing shaft connecting head hole (653); a toothed plate limiting pin screw bushing (6311) is provided in the toothed plate limiting pin screw bushing (6311), and a toothed plate limiting pin screw (63111) is provided in the toothed plate limiting pin screw bushing (6311).A pivot support hole (521) with a bushing is provided at the lower front of the left support bracket (52) of the fixed shaft. The left end of the foot support arm fixed shaft (51) is pivotally engaged with the pivot support hole (521) of the left support bracket through the bushing. The left end of the foot support arm fixed shaft (51) extends to the left side of the left support bracket (52) and extends to a fixed shaft connector (511). The fixed shaft connector (511) is inserted into the fixed shaft connector hole (653) to fix the left end of the foot support arm fixed shaft (51) to the fan-shaped toothed plate (65). The toothed plate limits the screw pin (63111) to be screwed into the fixed shaft connector. The left end face of the head (511) is defined, and a gear shaft pivot support hole (522) is opened in the middle of the left support of the fixed shaft (52). A shaft support bearing is provided in the gear shaft pivot support hole (522). The right end of the gear shaft (641) is rotatably engaged with the shaft support bearing. A right support pivot support hole (532) is opened at the lower front end of the right support of the fixed shaft (53) and at the position corresponding to the right end of the foot support arm fixed shaft (51). A right support pivot support hole bushing (5321) is embedded in the right support pivot support hole (532). The right end of the foot support arm fixed shaft (51) is connected to the right support. The frame pivot bearing bushing (5321) is rotatably engaged, and the right end of the footrest arm fixing shaft (51) extends to the right side of the fixing shaft right bracket (53). A fixing ear (533) is formed by folding down the upper front part of the fixing shaft right bracket (53). A right bracket fixing ear connecting piece (5332) is fixed at the position corresponding to the front of the fixing ear (533) by a right bracket fixing ear connecting piece fixing screw (5331). The right end of the right bracket fixing ear connecting piece (5332) is fixed to the front side of the right side plate (2) of the chair back frame by a right bracket fixing ear connecting piece screw (53321). The rear end of 53) comprises an upper connecting arm (534) and a lower connecting arm (535) of the right fixed shaft bracket. The upper connecting arm (534) and the lower connecting arm (535) are each fixed to the left end of the right fixed shaft bracket connecting plate (531) by connecting arm screws (536). A pair of connecting plate fixing screw holes (5311) are provided at the right end of the right fixed shaft bracket connecting plate (531), and the right end of the right fixed shaft bracket connecting plate (531) is fixed to the rear side of the right side panel (2) of the chair back frame by connecting plate fixing screws (53111) at positions corresponding to the pair of connecting plate fixing screw holes (5311).

7. The rear footrest structure of the automobile seat according to claim 5, characterized in that: The upper end of the gearbox fixing plate (63) is fixed to the upper end of the left bracket of the fixed shaft (52) by a pair of gearbox fixing plate screws (632) and is limited by a gearbox fixing plate screw limiting nut (6321) located on the right side of the left bracket of the fixed shaft (52) and screwed onto the right end of the pair of gearbox fixing plate screws (632); an arc-shaped guide groove (652) penetrating the thickness direction of the fan-shaped toothed plate (65) is provided on the fan-shaped toothed plate (65) and at the middle of the fan-shaped toothed plate (65); a fan-shaped plate front and back swing guide limiting screw shaft (524) is provided on the left bracket of the fixed shaft (52) and at the position corresponding to the arc-shaped guide groove (652), and the left end of the fan-shaped plate front and back swing guide limiting screw shaft (524) extends into the arc-shaped guide groove (652).

8. The rear footrest structure of the automobile seat according to claim 3, characterized in that: The gearbox fixing plate connecting device (13) includes a gearbox fixing plate front connecting plate (131) and a pair of gearbox fixing plate rear connecting plates (132). The gearbox fixing plate front connecting plate (131) corresponds to the upper front end of the gearbox fixing plate (63). The left end of the gearbox fixing plate front connecting plate (131) is fixed to the front side of the left side plate (1) of the chair back frame by a gearbox fixing plate front connecting plate left fixing screw. The right end of the gearbox fixing plate front connecting plate (131) protrudes to the right front side of the left side plate (1) of the chair back frame. The pair of gearbox fixing plate rear connecting plates (132) are vertically aligned with each other and correspond to the rear side of the gearbox fixing plate (63). The left ends of each of the pair of gearbox fixing plate rear connecting plates (132) are fixed to the left side plate of the chair back frame by a gearbox fixing plate rear connecting plate left fixing screw. (1) is fixed to the rear side, and the right end of the pair of gearbox fixing plate rear connecting plates (132) protrudes from the rear right side of the left side plate (1) of the chair back frame. A gearbox fixing plate front connecting ear (633) is folded to the right at the upper front end of the gearbox fixing plate (63). The gearbox fixing plate front connecting ear (633) is fixed to the right end of the gearbox fixing plate front connecting plate (131) by a gearbox fixing plate front connecting ear fixing screw (6331). At the rear end of the gearbox fixing plate (63) and at the position corresponding to the right end of the pair of gearbox fixing plate rear connecting plates (132), a pair of gearbox fixing plate rear connecting ears (634) are folded to the left. Each of the pair of gearbox fixing plate rear connecting ears (634) is fixed to the pair of gearbox fixing plate rear connecting plates (132) by a gearbox fixing plate rear connecting ear fixing screw.

9. The rear footrest structure of a car seat according to claim 5, characterized in that: A torsion spring first foot hook hole (542) is provided at the rear end of the left arm (54) of the foot plate and at the position corresponding to the first torsion spring first foot (571) of the first torsion spring (57). A torsion spring second foot hook seat (561) is formed at the middle of the front side of the bracket (56) and at the position corresponding to the second torsion spring second foot (572) of the first torsion spring (57). The first torsion spring first foot (571) is hooked into the torsion spring first foot hook hole (542), and the second torsion spring second foot (572) is hooked onto the torsion spring second foot hook seat (561). At the rear end of the right arm (55) of the foot plate and at the position corresponding to the second torsion spring (57) of the second torsion spring (57), a torsion spring first foot hook hole (542) is provided. 8) A second torsion spring hook hole (552) is provided at the position of the first positioning foot (581) of the second torsion spring. A second torsion spring hook seat (562) is formed at the middle of the front side of the bracket (56) and at the position corresponding to the second positioning foot (582) of the second torsion spring (58). The first positioning foot (581) of the second torsion spring (58) is hooked in the second hook hole (552) of the torsion spring, and the second positioning foot (582) of the second torsion spring is hooked on the second positioning foot hook seat (562). The rear ends of the left and right arms (54, 55) of the foot plate each form a Z-shaped structure.

10. The rear footrest structure of a car seat according to claim 6, characterized in that: A bracket fixing connection foot (525) is formed by folding to the right at the lower front side of the left bracket (52) and at the position corresponding to the left end of the bracket (56). The bracket fixing connection foot (525) is fixedly connected to the left end of the bracket (56) by a bracket fixing connection foot screw (5251). A bracket fixing connection ear (537) is formed by folding to the left at the lower front end of the right bracket (53) and at the position corresponding to the front of the right bracket pivot support hole (532). The bracket fixing connection ear (537) is fixedly connected to the right end of the bracket (56) by a bracket fixing connection ear screw (5371).

Images