Height-adjusting device for automobile seat

Abstract

A height adjustment device for a car seat comprises an outer cover shell, a mounting plate, a locking assembly, a toggle plate, a toggle assembly, a transmission plate and a central shaft, and has the following features: the toggle assembly comprises a driving outer plate and a driving inner plate, the driving outer plate is fixedly connected to the transmission plate and has a driving outer plate clamping cavity in the middle, a driving inner plate spline hole is provided at the center of the driving inner plate, a toggle plate is arranged between the driving outer plate and the linkage plate, the toggle plate is fixed to the driving outer plate, the driving inner plate is arranged on the toggle plate, a toggle plate center hole is provided in the middle of the toggle plate, a rubber block is arranged at the corner of the driving outer plate clamping cavity, driving rollers are arranged on both sides of the rubber block, a toggle block is arranged on one side surface of the toggle plate, a toggle plate reset block is arranged on the outer peripheral side surface of the toggle plate, a transmission plate convex block is provided on the outer peripheral side surface of the transmission plate, a locking disc spring is arranged on the outer peripheral side surface of the driving outer plate, and a reset disc spring is arranged on the outer peripheral side surface of the toggle plate. The structure is compact and simple, the transmission reliability is strong, the service life is long, looseness between components is prevented, and the processing cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle accessories, and in particular relates to a height-adjusting device for a car seat. Background Art

[0002] As the economy and society develop day by day, cars, as a convenient means of transportation in people's daily life, have become more and more popular and gradually become a necessity for family life. Passenger vehicles or commercial vehicles such as cars are usually equipped with height adjusters to adjust the seat height so that the seat fits the human body's comfortable sitting posture. At present, there are mainly two types of height adjustment devices for car seats on the market: manual and electric. Manual height adjustment devices are popular among consumers due to their small size, space saving, low production cost, and relatively stable transmission.

[0003] The Chinese utility model patent authorization announcement number is CN206171245U, which discloses a "manual seat height adjustment device based on a 3Z gear mechanism", which includes a 3Z gear mechanism that drives the seat to rise or fall and a manual seat height adjustment mechanism that drives the 3Z gear mechanism to move. The manual seat height adjustment mechanism includes a driving handle, a cover, a driving handle return torsion spring, a manual driving shaft, a driving gear, a driven gear, three sets of elastic driving components and a cover plate. When the seat cushion part is to be lowered or raised, the driving handle is pressed down or lifted to drive the manual driving shaft to rotate in the positive or reverse direction. The manual driving shaft drives the driving gear to rotate through the three sets of elastic driving components, and the driving handle return torsion spring is torsionally stored; the rotation of the driving gear drives the driven gear to rotate, and the driven gear drives the driving shaft in the 3Z gear mechanism to rotate. As described in its specification, this technical solution has the advantages of high strength and greatly enhanced safety; however, the use of a gear mechanism for transmission rotation not only has a complex component structure, a large number, and a high production cost, but also the corresponding components are prone to wear and have a short service life.

[0004] In view of the above-mentioned prior art, it is necessary to reasonably improve the structure of the existing height-adjusting device for automobile seats. For this reason, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Summary of the invention

[0005] The object of the present invention is to provide a height adjustment device for a car seat which is simple in structure, compact and reliable, has low production cost, helps to simplify the transmission structure to achieve reliable adjustment of the height of the car seat and prolong the service life of the device, and is conducive to improving the locking mechanism so as to effectively lock the central axis itself without affecting the height adjustment action, thereby preventing the car seat from sinking by itself.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a height-adjusting device for a car seat, comprising an outer cover shell having a shell cavity formed therein, a mounting plate arranged on one side of the outer cover shell and fixedly mounted therewith, a locking assembly arranged in the shell cavity and close to the mounting plate, a linkage disk arranged on the surface of the locking assembly on the side away from the mounting plate, a disk-moving assembly arranged on the side of the linkage disk away from the locking assembly, a transmission disk arranged on the side of the disk-moving assembly away from the linkage disk, and a central axis coaxially passing through the outer cover shell, the transmission disk, the disk-moving assembly, the linkage disk, and the locking assembly in sequence, the central axis protruding out of the mounting plate and forming an output The gear has a spline portion formed at the middle position of the body in the length direction of the central axis, and the spline portion is transmission connected to the linkage disk, characterized in that: the disk-moving assembly includes a driving outer disk and a driving inner disk, the driving outer disk is fixedly connected to the transmission disk and a driving outer disk clamping cavity in the shape of a regular polygon is formed in the middle thereof, the driving inner disk is disc-shaped and its outer circumferential surface is cylindrical, a driving inner disk spline hole is formed at the center position of the driving inner disk, the driving inner disk spline hole is transmission connected to the spline portion while maintaining a small clearance, a disk-shaped dial plate is arranged between the driving outer disk and the linkage disk, the dial plate is fixedly connected to the driving outer disk and the driving The inner disk is arranged on the toggle disk, and a toggle disk center hole is formed at the middle position of the toggle disk. A rubber block is respectively arranged at each angular position of the driving outer disk clamping cavity. Both sides of the rubber block are concave and a driving roller is respectively arranged at the concave position. A plurality of toggle blocks are arranged at intervals along the circumference of the toggle disk on a side surface of the toggle disk away from the linkage disk and at the outer edge position of the toggle disk center hole. The toggle block penetrates into the space formed by the driving rollers of different pairs of adjacent two rubber blocks arranged opposite to each other. A toggle disk reset block is convexly arranged on the outer peripheral side surface of the toggle disk to form an integral structure with the toggle disk, and on the outer peripheral side surface of the transmission disk and at a position corresponding to the toggle disk reset block A transmission disk protrusion is formed, and a locking disk spring is arranged on the outer peripheral side surface of the driving outer disk, and a locking disk spring head is formed at the end of the locking disk spring, which can simultaneously stop the toggle disk reset block and the transmission disk protrusion; a reset disk spring is also arranged on the outer peripheral side surface of the transmission disk, and a reset disk spring head is formed at the end of the reset disk spring, which can stop the transmission disk protrusion; a raised disk spring positioning block is formed on the inner peripheral side wall of the hollow cavity in the shell of the outer cover shell and at a position corresponding to the locking disk spring head and the reset disk spring head, the disk spring positioning block is arranged on the outside of the toggle disk reset block and the transmission disk protrusion away from the direction of the central axis, and the locking disk spring head and the reset disk spring head are both clamped on the disk spring positioning block.

[0007] In a specific embodiment of the present invention, the outer cover shell is in the shape of a volute with an open mouth at one end, and an outer cover shell center hole is provided at the central position of a side surface opposite to the open mouth, and a plurality of connecting block movable grooves are also interspersed on the side surface, and a plurality of outer cover shell ear seats are formed on the outer peripheral side surface of the outer cover shell to form an integral structure with the outer cover shell, and an outer cover shell fixing rivet hole is provided on the outer cover shell ear seat that runs through the thickness direction thereof.

[0008] In another specific embodiment of the present invention, a mounting plate center hole is provided on the mounting plate and runs through the mounting plate in the thickness direction, and a mounting plate center convex ring extending horizontally toward the spline portion is formed at the peripheral side edge of the mounting plate center hole, and a mounting plate bushing is provided at the position of the mounting plate center hole, and a mounting plate bushing inner cavity is formed inside the mounting plate bushing, and the mounting plate bushing includes a disc-shaped bushing support plate and a bushing inner boss extending into the mounting plate center hole, and the bushing support plate and the bushing inner boss are formed as An integrated structure, and a bushing support plate is arranged on a side surface of the mounting plate close to the locking assembly; a mounting plate fixing rivet hole is opened on the main body of the mounting plate and at a position corresponding to the outer cover shell fixing rivet hole, and a fixing rivet is arranged in the outer cover shell fixing rivet hole, and the fixing rivet passes through the outer cover shell fixing rivet hole and the mounting plate fixing rivet hole in sequence to fix the outer cover shell and the mounting plate together, and a plurality of mounting holes for fixing the mounting plate to the bracket on the seat frame are opened on the mounting plate.

[0009] In another specific embodiment of the present invention, the locking assembly includes a locking outer wheel disc and a locking cam block, a cylindrical outer wheel disc inner cavity is formed in the middle of the locking outer wheel disc, the locking cam block is arranged in the outer wheel disc inner cavity and its outer peripheral side surface is formed as an outer contour including a plurality of protrusions, and a locking cam block spline hole is formed in the middle of the locking cam block, the spline portion cooperates with the locking cam block spline hole while maintaining a certain clearance, a plurality of support blocks are arranged between the outer wheel disc inner cavity and the outer contour of the locking cam block, and a locking roller is arranged on both sides of the support block, the protrusion of the locking cam block protrudes outward along its radial direction and the distance between the end of the protrusion and the inner peripheral side surface of the locking outer wheel disc is less than the diameter of the aforementioned locking roller.

[0010] In another specific embodiment of the present invention, the locking outer wheel disc is formed by joining a plurality of disc-shaped thin metal sheets, a plurality of outer wheel disc protrusions are convexly provided on the outer peripheral side wall of the locking outer wheel disc and spaced along its circumference, and protrusion block accommodating grooves are respectively provided on the inner peripheral side wall of the cavity in the shell of the outer cover shell and at positions corresponding to the protrusions of each outer wheel disc, and the outer wheel disc protrusions match the corresponding protrusion block accommodating grooves; a plurality of locking outer wheel disc positioning grooves are spaced along its circumference on the annular body of the locking outer wheel disc A hole is provided on the mounting plate, and the locking outer wheel disc positioning hole passes through the thickness direction of the locking outer wheel disc. A mounting plate positioning hole is provided on the mounting plate and at a position corresponding to the locking outer wheel disc positioning hole. A positioning rivet is provided in the locking outer wheel disc positioning hole, and the positioning rivet passes through the locking outer wheel disc positioning hole and the mounting plate positioning hole in sequence to fix the locking outer wheel disc and the mounting plate together. The locking cam block is formed by joining a plurality of thin metal sheets, and the locking cam block spline hole is located at the center of the locking cam block.

[0011] In another specific embodiment of the present invention, a linkage disk spline hole is formed at the center position of the linkage disk, and the linkage disk spline hole realizes transmission cooperation with the spline part of the center shaft while maintaining a small clearance, and a plurality of linkage disk outer stop convexities are formed on the outer peripheral side of the linkage disk, and an unlocking block extending toward the locking outer wheel disk is formed between two adjacent linkage disk outer stop convexities, and a plurality of linkage disk connecting holes are arranged on the main body of the linkage disk and at intervals along its circumferential direction at the outer edge position corresponding to the linkage disk spline hole, and a circular ring-shaped spacer sleeve is arranged on the outer side of the linkage disk, and a spacer sleeve central cavity is formed inside the spacer sleeve, and the linkage disk is arranged in the spacer sleeve central cavity of the spacer sleeve, and a plurality of outer protrusion positioning grooves are formed in the spacer sleeve central cavity and at the position corresponding to the linkage disk outer stop convexity, the linkage disk outer stop convexity and the outer protrusion positioning groove cooperate and lock with each other, and an unlocking block yielding groove is formed between two adjacent outer protrusion positioning grooves, and the unlocking block passes through the unlocking block yielding groove and then probes into the space formed by different pairs of locking rollers arranged opposite to each other of two adjacent support blocks.

[0012] In a further specific embodiment of the present invention, the driving outer disk is formed by joining a plurality of thin metal sheets, a plurality of driving outer disk connecting rivet holes are provided on the body of the driving outer disk and spaced along the circumference thereof, and a transmission disk connecting rivet hole is provided on the body of the transmission disk and at a position corresponding to the driving outer disk connecting rivet hole, which runs through the thickness direction thereof, and a connecting rivet is provided at the transmission disk connecting rivet hole, and the connecting rivet passes through the transmission disk connecting rivet hole and the driving outer disk connecting rivet hole in sequence to fix the driving outer disk and the transmission disk together; The driving inner disk is arranged on the linkage disk and is also formed by joining a plurality of thin metal sheets. A driving inner disk spline hole is formed at the center position of the driving inner disk. The driving inner disk spline hole realizes transmission cooperation with the spline portion of the center shaft while maintaining a small clearance. A driving inner disk connecting hole that runs through the thickness direction is opened on the main body of the driving inner disk and at a position corresponding to the linkage disk connecting hole. A connecting piece is arranged in the driving inner disk connecting hole. The connecting piece passes through the driving inner disk connecting hole and the linkage disk connecting hole in sequence to fix the driving inner disk and the linkage disk.

[0013] In a more specific embodiment of the present invention, a plurality of connecting blocks are spaced apart at the circumferential edge of the surface of one side of the transmission disk away from the driving outer disk. The connecting blocks are horizontally extended toward the transmission disk and can rotate in the connecting block movable groove of the outer cover shell. A connecting block center hole is provided on the connecting block that runs through the thickness direction thereof, and the transmission disk is fixedly connected to the external height adjustment handle through the connecting block center hole.

[0014] In yet another specific embodiment of the present invention, a transmission disk positioning sleeve is provided on a side surface of the transmission disk away from the driving outer disk and at a position corresponding to the center hole of the transmission disk. The transmission disk positioning sleeve forms a positioning sleeve convex ring toward the center hole of the outer cover shell, and the center axis passes through the positioning sleeve convex ring and protrudes out of the center hole of the outer cover shell.

[0015] In yet another specific embodiment of the present invention, a center shaft positioning portion is formed between the output gear and the spline portion of the center shaft, and the center shaft positioning portion is disposed in the inner cavity of the mounting plate bushing of the mounting plate bushing.

[0016] Since the present invention is provided with a disk-moving assembly, when the transmission disk rotates, it also drives the driving outer disk of the disk-moving assembly to rotate, and makes the toggle block of the toggle disk move to a position where it presses the surface of one of each pair of two driving rollers. At this time, the driving roller presses the rubber block and the rubber block is compressed, thereby releasing the gap to drive the inner disk to rotate, and the action of the driving inner disk drives the linkage disk fixed thereto to rotate, and makes the locking assembly release the central shaft and further drives the central shaft to rotate. The structure is compact and simple, the transmission reliability is strong, and the service life is greatly extended. In addition, due to the provision of the locking assembly, when the overall mechanism is subjected to reverse torque (that is, when the central shaft is subjected to force), the torque of the central shaft is transmitted to the locking cam block, and at this time the protrusion of the locking cam block and the locking outer wheel are locked. The circumferential arc of the inner cavity of the outer wheel of the disk forms a wedge angle, and under the action of the elastic force of the support block, the locking roller is always pushed in the direction of mutual wedging, thereby ensuring that the locking cam block, the locking roller and the locking outer wheel disk are kept in a self-locking state, preventing looseness between the components and effectively extending the service life. At the same time, the overall structure is compact and reliable, and the processing cost is low; when the user wants to adjust the height of the car seat, the torque transmitted to the linkage disk causes its self-locking block to be pressurized onto one of the surfaces of the locking rollers on both sides of each corresponding support block, the support block is squeezed and when the linkage disk continues to rotate, the locking cam block is released, thereby the locking cam block can drive the central shaft to rotate, thereby realizing the adjustment of the height of the car seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural exploded view of an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the internal three-dimensional structure of an embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the planar structure of the disk mechanism of the present invention.

[0020] Figure 4 It is a schematic diagram of the planar structure of the locking mechanism of the present invention.

[0021] Figure 5 It is a plan view of the disc spring positioning block stopping structure of the present invention.

[0022] In the figure: 1. outer cover shell, 11. hollow cavity in the shell, 111. coil spring positioning block, 112. convex block receiving groove, 12. center hole of the outer cover shell, 13. connecting block moving groove, 14. outer cover shell ear seat, 141. outer cover shell fixing rivet hole,

[0023] 2. Mounting plate, 21. Center hole of mounting plate, 211. Center convex ring of mounting plate, 22. Bushing of mounting plate, 221. Inner hole of bushing of mounting plate, 222. Inner boss of bushing, 223. Bushing support plate, 23. Fixing rivet hole of mounting plate, 24. Mounting hole, 25. Positioning hole of mounting plate;

[0024] 3. Locking assembly, 31. Locking outer wheel disc, 311. Inner cavity of outer wheel disc, 312. Positioning hole of locking outer wheel disc, 313. Outer wheel disc protrusion block, 32. Locking cam block, 321. Spline hole of locking cam block, 322. Protrusion, 33. Support block, 34. Locking roller;

[0025] 4. Linkage plate, 41. Linkage plate spline hole, 42. Linkage plate outer stop convex, 43. Unlocking block, 44. Linkage plate connecting hole, 45. Spacer sleeve, 451. Spacer sleeve center cavity, 452. External convex positioning groove, 453. Unlocking block yielding groove;

[0026] 5. Disc assembly, 51. Drive outer disc, 511. Drive outer disc clamping cavity, 512. Drive outer disc connecting rivet hole, 52. Drive inner disc, 521. Drive inner disc spline hole, 522. Drive inner disc connecting hole, 53. Dial disc, 531. Dial disc center hole, 532. Dial block, 533. Dial disc reset block, 54. Rubber block, 55. Drive roller, 56. Locking disc spring, 561. Locking disc spring head;

[0027] 6. Transmission plate, 61. Transmission plate center hole, 62. Connection block, 621. Connection block center hole, 63. Transmission plate connection rivet hole, 64. Transmission plate positioning sleeve, 641. Positioning sleeve convex ring, 65. Transmission plate convex block, 66. Reset disc spring, 661. Reset disc spring head;

[0028] 7. center shaft, 71. output gear, 72. spline part, 73. center shaft positioning part;

[0029] 100. Fixing rivets, 200. Positioning rivets, 300. Connectors, 400. Connecting rivets. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0031] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back refer to the position state of the figure being described, and therefore cannot be understood as a special limitation on the technical solution provided by the present invention.

[0032] See also Figures 1 to 5, a height-adjusting device for a car seat, comprising an outer cover shell 1 having a shell cavity 11 formed therein, a mounting plate 2 arranged on one side of the outer cover shell 1 and fixedly mounted therewith, a locking assembly 3 arranged in the aforementioned shell cavity 11 and close to the mounting plate 2, a linkage disk 4 arranged on a surface of a side of the locking assembly 3 away from the aforementioned mounting plate 2, a disc assembly 5 arranged on a side of the linkage disk 4 away from the locking assembly 3, a transmission disk 6 arranged on a side of the disc assembly 5 away from the linkage disk 4, and a central axis 7 coaxially passing through the aforementioned outer cover shell 1, the transmission disk 6, the disc assembly 5, the linkage disk 4, and the locking assembly 3 in sequence, the central axis 7 protruding out of the aforementioned mounting plate 2 and having an output gear 71 formed on the outer side of the mounting plate 2, a spline portion 72 is formed at the middle position of the main body in the length direction of the central axis 7, and the spline portion 72 is drivingly connected to the linkage disk 4.

[0033] As the technical key points of the present invention, the aforementioned disk assembly 5 includes a driving outer disk 51 and a driving inner disk 52, the driving outer disk 51 is fixedly connected to the transmission disk 6 and a driving outer disk clamping cavity 511 in the shape of a regular polygon is formed in the middle thereof, the aforementioned driving inner disk 52 is disc-shaped and its outer circumferential surface is cylindrical, a driving inner disk spline hole 521 is formed at the center position of the aforementioned driving inner disk 52, and the driving inner disk spline hole 521 is drivingly connected with the aforementioned spline portion 72 while maintaining a small clearance, and a toggle disk 53 in the shape of a disc is arranged between the aforementioned driving outer disk 51 and the aforementioned linkage disk 4, and the toggle disk 5 3 is fixedly connected to the driving outer disk 51, and the aforementioned driving inner disk 52 is arranged on the toggle disk 53, a toggle disk center hole 531 is formed at the middle position of the toggle disk 53, a rubber block 54 is respectively arranged at each corner position of the aforementioned driving outer disk clamping cavity 511, both sides of the rubber block 54 are concave and a driving roller 55 is respectively arranged at the concave position, and a plurality of toggle blocks 532 are arranged at intervals along the circumference of the toggle disk 53 on the side surface away from the linkage disk 4 and at the outer edge position of the toggle disk center hole 531, and the toggle blocks 532 penetrate into different pairs of driving rollers arranged opposite to each other of two adjacent rubber blocks 54. In the space formed by the toggle disk 55, a toggle disk reset block 533 is convexly arranged on the outer peripheral side surface of the toggle disk 53 and forms an integral structure with the toggle disk 53, and a transmission disk protrusion 65 is formed on the outer peripheral side surface of the transmission disk 6 and at a position corresponding to the toggle disk reset block 533. A locking disc spring 56 is coiled on the outer peripheral side surface of the aforementioned driving outer disk 51, and a locking disc spring head 561 is formed at the end of the locking disc spring 56, which can simultaneously stop the toggle disk reset block 533 and the transmission disk protrusion 65. A reset disc spring 66 is also coiled on the outer peripheral side surface of the aforementioned transmission disk 6, and a locking disc spring head 561 is formed at the end of the locking disc spring 56, which can stop the front The reset disc spring head 661 of the transmission disc protrusion 65, and the distance in the height direction between the aforementioned toggle disc reset block 533 and the transmission disc protrusion 65 determines the distance that the locking disc spring 56 and the reset disc spring 66 can be stretched apart. A raised disc spring positioning block 111 is formed on the inner peripheral side wall of the hollow cavity 11 in the shell of the aforementioned outer cover shell 1 and at a position corresponding to the aforementioned locking disc spring head 561 and the reset disc spring head 661. The disc spring positioning block 111 is arranged on the outside of the aforementioned toggle disc reset block 533 and the transmission disc protrusion 65 away from the direction of the central axis 7, and the aforementioned locking disc spring head 561 and the reset disc spring head 661 are both snap-fitted on the disc spring positioning block 111.

[0034] In the present embodiment, the aforementioned outer cover shell 1 is in the shape of a volute with an open mouth at one end, and the outer cover shell 1 is provided with an outer cover shell center hole 12 at the central position of the side surface opposite to the open mouth, and a plurality of connecting block moving grooves 13 are also interspersed on the side surface, and a plurality of outer cover shell ear seats 14 are formed on the outer peripheral side surface of the outer cover shell 1 to form an integral structure with the outer cover shell 1, and an outer cover shell fixing rivet hole 141 is provided on the outer cover shell ear seat 14 to penetrate through the thickness direction thereof.

[0035] Furthermore, a mounting plate center hole 21 is provided on the aforementioned mounting plate 2 and runs through the thickness direction thereof, and a mounting plate center convex ring 211 is formed at the peripheral edge of the mounting plate center hole 21 and horizontally extends toward the spline portion 72. A mounting plate bushing 22 is provided at the position of the mounting plate center hole 21, and a mounting plate bushing inner cavity 221 is formed inside the mounting plate bushing 22, and the mounting plate bushing 22 includes a disc-shaped bushing support plate 223 and a bushing inner boss 222 that extends into the aforementioned mounting plate center hole 21, and the aforementioned bushing support plate 223 and the bushing inner boss 222 are formed as an integral body. structure, and a bushing support plate 223 is arranged on a side surface of the aforementioned mounting plate 2 close to the locking assembly 3; a mounting plate fixing rivet hole 23 is opened on the main body of the mounting plate 2 and at a position corresponding to the aforementioned outer cover shell fixing rivet hole 141, and a fixing rivet 100 is arranged in the aforementioned outer cover shell fixing rivet hole 141, and the fixing rivet 100 passes through the aforementioned outer cover shell fixing rivet hole 141 and the mounting plate fixing rivet hole 23 in sequence to fix the outer cover shell 1 and the mounting plate 2 together, and a plurality of mounting holes 24 are opened on the mounting plate 2 for fixing the mounting plate 2 to the bracket of the seat frame.

[0036] Please continue to see Figure 1 Please Figure 4 The locking assembly 3 includes a locking outer wheel disc 31 and a locking cam block 32. A cylindrical outer wheel disc inner cavity 311 is formed in the middle of the locking outer wheel disc 31. The locking cam block 32 is arranged in the outer wheel disc inner cavity 311 and its outer peripheral side surface is formed as an outer contour including a plurality of protrusions 322. A locking cam block spline hole 321 is formed in the middle of the locking cam block 32. The spline portion 72 cooperates with the locking cam block spline hole 321 while maintaining a certain clearance. A plurality of support blocks 33 are arranged between the outer wheel disc inner cavity 311 and the outer contour of the locking cam block 32. A locking roller 34 is respectively arranged on both sides of the support block 33. The protrusion 322 of the locking cam block 32 is protruded outwardly along its radial direction and the distance between the end of the protrusion 322 and the inner peripheral side surface of the locking outer wheel disc 31 is less than the diameter of the locking roller 34. The number of the supporting blocks 33 shown in the figure is five, and the number of the locking rollers 34 is ten.

[0037] In the present embodiment, the aforementioned locking outer wheel disc 31 is formed by joining a plurality of disc-shaped thin metal sheets, and a plurality of outer wheel disc protrusions 313 are protruded on the outer peripheral side wall of the locking outer wheel disc 31 and spaced along its circumference, and protrusion block accommodating grooves 112 are respectively opened on the inner peripheral side wall of the shell cavity 11 of the aforementioned outer cover shell 1 and at the position corresponding to each outer wheel disc protrusion 313, and the aforementioned outer wheel disc protrusions 313 cooperate with the corresponding protrusion block accommodating grooves 112; a plurality of locking outer wheel disc positioning holes 312 are opened on the annular body of the locking outer wheel disc 31 and spaced along its circumference, and the locking outer wheel disc positioning holes 312 are The positioning hole 312 passes through the thickness direction of the aforementioned locking outer wheel disc 31, and a mounting plate positioning hole 25 is opened on the aforementioned mounting plate 2 and at a position corresponding to the locking outer wheel disc positioning hole 312. A positioning rivet 200 is arranged in the aforementioned locking outer wheel disc positioning hole 312, and the positioning rivet 200 passes through the locking outer wheel disc positioning hole 312 and the mounting plate positioning hole 25 in sequence to fix the locking outer wheel disc 31 and the mounting plate 2 together; the locking cam block 32 is formed by joining a plurality of thin metal sheets, and the locking cam block spline hole 321 is located at the center of the locking cam block 32.

[0038] Furthermore, a linkage disk spline hole 41 is formed at the center position of the aforementioned linkage disk 4, and the linkage disk spline hole 41 realizes transmission cooperation with the spline portion 72 of the central shaft 7 while maintaining a small clearance. A plurality of linkage disk outer stop convexities 42 are formed on the outer peripheral side of the aforementioned linkage disk 4, and an unlocking block 43 extending toward the locking outer wheel disc 31 is formed between two adjacent linkage disk outer stop convexities 42, and a plurality of linkage disk connecting holes 44 are arranged on the main body of the linkage disk 4 and at intervals along the circumferential direction thereof at the outer edge position corresponding to the aforementioned linkage disk spline hole 41, and a circular annular spacer sleeve 4 is arranged on the outer side of the linkage disk 4. 5. A spacer sleeve center cavity 451 is formed inside the spacer sleeve 45. The aforementioned linkage disk 4 is arranged in the spacer sleeve center cavity 451 of the spacer sleeve 45. A plurality of outer protrusion positioning grooves 452 are formed in the spacer sleeve center cavity 451 and at positions corresponding to the aforementioned linkage disk outer stop protrusions 42. The aforementioned linkage disk outer stop protrusions 42 and the outer protrusion positioning grooves 452 cooperate and lock with each other. An unlocking block yielding groove 453 is formed between two adjacent outer protrusion positioning grooves 452. The aforementioned unlocking block 43 passes through the unlocking block yielding groove 453 and then probes into the space formed by different pairs of locking rollers 34 arranged opposite to each other in two adjacent support blocks 33.

[0039] Please continue to see Figures 1 to 4The aforementioned driving outer disk 51 is formed by joining a plurality of thin metal sheets, and a plurality of driving outer disk connecting rivet holes 512 are provided on the body of the driving outer disk 51 and spaced along the circumference thereof, and a driving disk connecting rivet hole 63 is provided on the body of the aforementioned transmission disk 6 and at a position corresponding to the driving outer disk connecting rivet hole 512, which runs through the thickness direction thereof, and a connecting rivet 400 is provided at the transmission disk connecting rivet hole 63, and the connecting rivet 400 passes through the aforementioned transmission disk connecting rivet hole 63 and the driving outer disk connecting rivet hole 512 in sequence and fixes the driving outer disk 51 and the transmission disk 6 together; the aforementioned driving inner disk 52 is arranged at the aforementioned linkage The disk 4 is also formed by joining a plurality of thin metal sheets, and a driving inner disk spline hole 521 is formed at the center position of the driving inner disk 52. The driving inner disk spline hole 521 realizes transmission cooperation with the spline portion 72 of the center shaft 7 while maintaining a small clearance, and a driving inner disk connecting hole 522 is provided on the main body of the driving inner disk 52 and at a position corresponding to the aforementioned linkage disk connecting hole 44, which runs through the thickness direction thereof, and a connecting member 300 is arranged in the driving inner disk connecting hole 522, and the connecting member 300 passes through the driving inner disk connecting hole 522 and the linkage disk connecting hole 44 in sequence to fix the driving inner disk 52 and the linkage disk 4 together. In this embodiment, a plurality of convex joint heads are formed on one side surface of the metal sheet of the aforementioned driving outer disk 51 and the driving inner disk 52, and a plurality of corresponding joint heads are formed on the other side surface of the metal sheet. When two adjacent metal sheets are combined, the corresponding joint heads and the joint heads cooperate and lock with each other, thereby realizing the combination and fixation of the metal sheets. The metal sheets can be stamped out of steel plates of appropriate thickness into different shapes. The stamped metal sheets are then stacked and combined with each other to ensure their own light reliability and reduce costs. Although the shape and contour of the metal sheet of the aforementioned locking outer wheel disk 31 and the locking cam block 32 are different from those of the aforementioned driving outer disk 51 and the driving inner disk 52, their combination method is completely the same, so the applicant will not repeat them.

[0040] Furthermore, a plurality of connecting blocks 62 are spaced apart at the circumferential edge of the surface of one side of the aforementioned transmission disk 6 away from the driving outer disk 51. The connecting blocks 62 are horizontally extended toward the transmission disk 6 and can rotate in the connecting block movable groove 13 of the aforementioned outer cover shell 1. In the present embodiment, the number of the connecting blocks 62 and the connecting block movable groove 13 is three. The connecting block movable groove 13 can limit the rotation of the connecting block 62, and a connecting block center hole 621 is provided on the connecting block 62 which passes through the thickness direction thereof. The transmission disk 6 is fixedly connected to the external height adjustment handle through the connecting block center hole 621.

[0041] In this embodiment, a transmission disk positioning sleeve 64 is provided on the surface of the side of the transmission disk 6 away from the driving outer disk 51 and at a position corresponding to the center hole 61 of the transmission disk. The transmission disk positioning sleeve 64 forms a positioning sleeve protrusion 641 toward the center hole 12 of the outer cover shell, and the center axis 7 passes through the positioning sleeve protrusion 641 and protrudes out of the center hole 12 of the outer cover shell.

[0042] Preferably, a center shaft positioning portion 73 is formed between the output gear 71 and the spline portion 72 of the aforementioned center shaft 7 , and the center shaft positioning portion 73 is disposed in the mounting plate bushing inner cavity 221 of the aforementioned mounting plate bushing 22 .

[0043] Working principle: the aforementioned locking disc spring 56 and reset disc spring 66 keep the toggle plate 53 and the transmission disc 6 in a certain synchronous position. When the user needs to adjust the height of the car seat, the height adjustment handle is driven to drive the transmission disc 6 to rotate relative to the central axis 7, and the transmission disc 6 also drives the outer drive disc 51 to rotate when it rotates. At the same time, due to the blocking effect of the disc spring positioning block 111, one side of the locking disc spring 56 and the reset disc spring 66 is compressed. In order to overcome the tensioning force of the locking disc spring 56, the toggle plate 53 is driven and rotated relative to the driving inner disc 52, and the toggle block 532 moves to a position where it presses the surface of one of the two driving rollers 55 in each pair. At this time, the driving roller 55 presses the rubber block 54 and the rubber block 54 is compressed, thereby releasing the gap and causing the driving inner disc 52 to start to actuate. When the driving inner disc 52 actuates, it drives the linkage disc fixed thereto. 4 rotates and further drives the central shaft 7 to rotate. During this movement, the torque is transmitted to the unlocking block 43 of the linkage disk 4 via the driving roller 55 and the driving inner disk 52. The unlocking block 43 also begins to press the locking roller 34 on one side of the aforementioned support block 33, thereby squeezing and deforming the support block 33 and causing the support blocks 33 originally resting on the surface of the locking cam block 32 to disengage, thereby unlocking the locking cam block 32 to achieve a slight rotation of the central shaft 7. Once the driving handle is released to stop the rotation of the transmission disk 6, the dial disk 53 rotates and returns to the original fixed position in order to overcome the tension of the aforementioned locking disc spring 56 on itself, while the driving inner disk 52 is maintained at the rotated position, and the transmission disk 6 is returned to the original position by the force of the return disc spring 66, and the car seat is locked in the position adjusted to it at this time. During this adjustment process, the locking roller 34 rolls in the inner cavity 311 of the outer wheel disc 31. If the drive to the transmission disc 6 is stopped, the support block 33 and the locking roller 34 will lock the locking cam block 32 again, thereby preventing the central shaft 7 from rotating again, thereby keeping the seat in the adjusted position. By repeatedly driving the height adjustment handle to drive the transmission disc 6 to rotate, the seat height can be adjusted to the desired position.

[0044] In summary, the technical solution provided by the present invention makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A height-adjusting device for a car seat, comprising an outer cover (1) having a shell cavity (11) formed therein, a mounting plate (2) arranged on one side of the outer cover (1) and fixedly mounted thereto, a locking assembly (3) arranged in the shell cavity (11) and close to the mounting plate (2), a linkage disk (4) arranged on a surface of a side of the locking assembly (3) away from the mounting plate (2), a disk-moving assembly (5) arranged on a side of the linkage disk (4) away from the locking assembly (3), and a locking assembly (6) arranged on the locking assembly (6) A transmission plate (6) on the side of the disk-moving assembly (5) away from the linkage plate (4) and a central axis (7) which passes through the outer housing (1), the transmission plate (6), the disk-moving assembly (5), the linkage plate (4) and the locking assembly (3) in sequence are coaxially connected; the central axis (7) protrudes out of the mounting plate (2) and an output gear (71) is formed on the outer side of the mounting plate (2); a spline portion (72) is formed at the middle position of the main body in the length direction of the central axis (7), and the spline portion (72) is transmission-connected with the linkage plate (4), characterized in that: The disk-actuating assembly (5) comprises a driving outer disk (51) and a driving inner disk (52). The driving outer disk (51) is fixedly connected to the transmission disk (6) and has a driving outer disk clamping cavity (511) in the shape of a regular polygon formed in the middle thereof. The driving inner disk (52) is in the shape of a disk and its outer circumferential surface is cylindrical. A driving inner disk spline hole (521) is formed at the center of the driving inner disk (52). The driving inner disk spline hole (521) is drivingly connected to the spline portion (72) while maintaining play. A disk-shaped shifting disk (53) is arranged between the driving outer disk (51) and the linkage disk (4). The shifting disk (53) is The driving inner disk (52) is arranged on the toggle disk (53), a toggle disk center hole (531) is formed at the middle position of the toggle disk (53), a rubber block (54) is arranged at each angular position of the driving outer disk clamping cavity (511), both sides of the rubber block (54) are concave and a driving roller (55) is arranged at the concave position, a plurality of toggle blocks (532) are arranged at intervals along the circumference of the toggle disk (53) on the side surface of the toggle disk (53) away from the linkage disk (4) and at the outer edge position of the toggle disk center hole (531), and the toggle blocks (532) penetrate into the two adjacent rubber blocks. A toggle disk reset block (533) is convexly arranged on the outer peripheral side surface of the toggle disk (53) and is formed as an integral structure with the toggle disk (53), and a transmission disk protrusion (65) is formed on the outer peripheral side surface of the transmission disk (6) and at a position corresponding to the toggle disk reset block (533), and a locking disk spring (56) is coiled on the outer peripheral side surface of the driving outer disk (51), and a locking disk spring head (561) is formed at the end of the locking disk spring (56) which can simultaneously block the toggle disk reset block (533) and the transmission disk protrusion (65), and a locking disk spring head (561) is formed on the outer peripheral side surface of the transmission disk (6). A return disc spring (66) is also coiled on the surface, and a return disc spring head (661) capable of blocking the transmission disc protrusion (65) is formed at the end of the return disc spring (66). A protruding disc spring positioning block (111) is formed on the inner peripheral side wall of the hollow cavity (11) in the shell of the outer cover shell (1) and at a position corresponding to the locking disc spring head (561) and the return disc spring head (661). The disc spring positioning block (111) is arranged on the outside of the dial disc return block (533) and the transmission disc protrusion (65) away from the central axis (7), and the locking disc spring head (561) and the return disc spring head (661) are both snap-fitted on the disc spring positioning block (111).

2. The height-adjusting device for a car seat according to claim 1, characterized in that The outer casing (1) is in the shape of a volute with an open opening at one end. The outer casing (1) is provided with an outer casing center hole (12) at the center position of a side surface opposite to the open opening, and a plurality of connecting block moving grooves (13) are interspersed on the side surface. A plurality of outer casing ear seats (14) are formed on the outer peripheral side surface of the outer casing (1) and form an integral structure with the outer casing (1). The outer casing ear seat (14) is provided with an outer casing fixing rivet hole (141) penetrating through the thickness direction thereof.

3. The height-adjusting device for a car seat according to claim 2, characterized in that A mounting plate center hole (21) is provided on the mounting plate (2) and extends through the mounting plate in the thickness direction thereof, and a mounting plate center convex ring (211) is formed at the peripheral edge of the mounting plate center hole (21) and extends horizontally toward the spline portion (72). A mounting plate bushing (22) is provided at the position of the mounting plate center hole (21), and a mounting plate bushing inner cavity (221) is formed inside the mounting plate bushing (22), and the mounting plate bushing (22) includes a disc-shaped bushing support plate (223) and a bushing inner boss (222) extending into the mounting plate center hole (21), and the bushing support plate (223) and the bushing inner boss (222) form an integrated structure, and A bushing support plate (223) is arranged on a side surface of the mounting plate (2) close to the locking assembly (3); a mounting plate fixing rivet hole (23) is provided on the main body of the mounting plate (2) and at a position corresponding to the outer cover shell fixing rivet hole (141), and a fixing rivet (100) is arranged in the outer cover shell fixing rivet hole (141), and the fixing rivet (100) passes through the outer cover shell fixing rivet hole (141) and the mounting plate fixing rivet hole (23) in sequence to fix the outer cover shell (1) and the mounting plate (2) together, and a plurality of mounting holes (24) are provided on the mounting plate (2) for fixing the mounting plate (2) to a bracket of a seat frame.

4. The height-adjusting device for a car seat according to claim 1, characterized in that The locking assembly (3) comprises a locking outer wheel disc (31) and a locking cam block (32). A cylindrical outer wheel disc inner cavity (311) is formed in the middle of the locking outer wheel disc (31). The locking cam block (32) is arranged in the outer wheel disc inner cavity (311) and its outer peripheral side surface is formed into an outer contour including a plurality of protrusions (322). A locking cam block spline hole (321) is formed in the middle of the locking cam block (32). The spline portion (72) is provided with a certain clearance. In the case of a locking cam block (32), the locking cam block (32) cooperates with the spline hole (321) of the locking cam block, a plurality of support blocks (33) are arranged between the inner cavity (311) of the outer wheel disc and the outer contour of the locking cam block (32), and a locking roller (34) is arranged on both sides of the support block (33), and the protrusion (322) of the locking cam block (32) is protruded outwardly along its radial direction, and the distance between the end of the protrusion (322) and the inner peripheral side surface of the locking outer wheel disc (31) is less than the diameter of the aforementioned locking roller (34).

5. The height-adjusting device for a car seat according to claim 4, characterized in that The locking outer wheel disc (31) is formed by joining a plurality of disc-shaped thin metal sheets. A plurality of outer wheel disc protrusions (313) are convexly arranged on the outer peripheral side wall of the locking outer wheel disc (31) and spaced along the circumference thereof. Protrusion block accommodating grooves (112) are respectively provided on the inner peripheral side wall of the hollow cavity (11) in the shell of the outer cover shell (1) and at positions corresponding to the outer wheel disc protrusions (313). The outer wheel disc protrusions (313) match the corresponding protrusion block accommodating grooves (112). A plurality of locking outer wheel disc positioning holes (312) are spaced along the circumference thereof on the annular body of the locking outer wheel disc (31). The locking outer wheel disc positioning holes (312) are A mounting plate positioning hole (25) is provided on the mounting plate (2) in a thickness direction of the locking outer wheel disc (31) and at a position corresponding to the locking outer wheel disc positioning hole (312); a positioning rivet (200) is provided in the locking outer wheel disc positioning hole (312); the positioning rivet (200) passes through the locking outer wheel disc positioning hole (312) and the mounting plate positioning hole (25) in sequence, thereby fixing the locking outer wheel disc (31) and the mounting plate (2) together; the locking cam block (32) is formed by joining a plurality of thin metal sheets; the locking cam block spline hole (321) is located at the center of the locking cam block (32).

6. The height-adjusting device for a car seat according to claim 4, characterized in that A linkage disk spline hole (41) is formed at the center of the linkage disk (4), and the linkage disk spline hole (41) realizes transmission cooperation with the spline portion (72) of the center shaft (7) while maintaining a small clearance. A plurality of linkage disk outer stop protrusions (42) are formed on the outer peripheral side of the linkage disk (4), and an unlocking block (43) extending toward the locking outer wheel disk (31) is formed between two adjacent linkage disk outer stop protrusions (42). A plurality of linkage disk connecting holes (44) are arranged at intervals along the circumference of the linkage disk (4) at the outer edge position corresponding to the linkage disk spline hole (41). A circular ring-shaped spacing sleeve (45) is arranged on the outer side of the linkage disk (4). A spacer sleeve central cavity (451) is formed inside the spacer sleeve (45), the linkage disk (4) is arranged in the spacer sleeve central cavity (451) of the spacer sleeve (45), and a plurality of outer protrusion positioning grooves (452) are formed in the spacer sleeve central cavity (451) and at positions corresponding to the outer stop protrusions (42) of the linkage disk. The outer stop protrusions (42) of the linkage disk and the outer protrusion positioning grooves (452) cooperate and lock with each other, and an unlocking block clearance groove (453) is formed between two adjacent outer protrusion positioning grooves (452). After passing through the unlocking block clearance groove (453), the unlocking block (43) penetrates into the space formed by different pairs of locking rollers (34) arranged opposite to each other of two adjacent support blocks (33).

7. The height-adjusting device for a car seat according to claim 1, characterized in that The driving outer disk (51) is formed by joining a plurality of thin metal sheets, and a plurality of driving outer disk connecting rivet holes (512) are provided on the body of the driving outer disk (51) and are spaced apart along the circumference thereof, and a transmission disk connecting rivet hole (63) is provided on the body of the transmission disk (6) and at a position corresponding to the driving outer disk connecting rivet hole (512) and penetrating the thickness direction thereof, and a connecting rivet (400) is provided at the transmission disk connecting rivet hole (63), and the connecting rivet (400) passes through the transmission disk connecting rivet hole (63) and the driving outer disk connecting rivet hole (512) in sequence to fix the driving outer disk (51) and the transmission disk (6) together; the driving inner disk (52) is arranged on the linkage disk ( 4) and is also formed by joining a plurality of thin metal sheets, a driving inner disk spline hole (521) is formed at the center position of the driving inner disk (52), and the driving inner disk spline hole (521) realizes transmission cooperation with the spline portion (72) of the central shaft (7) while maintaining a small clearance, and a driving inner disk connecting hole (522) is opened on the main body of the driving inner disk (52) and at a position corresponding to the linkage disk connecting hole (44) and penetrating the thickness direction thereof, and a connecting member (300) is arranged in the driving inner disk connecting hole (522), and the connecting member (300) passes through the driving inner disk connecting hole (522) and the linkage disk connecting hole (44) in sequence, so as to fix the driving inner disk (52) and the linkage disk (4) together.

8. The height-adjusting device for a car seat according to claim 2, characterized in that A plurality of connection blocks (62) are arranged at intervals at the circumferential edge of a side surface of the transmission disk (6) away from the driving outer disk (51); the connection blocks (62) extend horizontally toward the transmission disk (6) and can rotate in the connection block moving groove (13) of the outer cover shell (1); a connection block center hole (621) is provided on the connection block (62) and runs through the thickness direction thereof; the transmission disk (6) is fixedly connected to the external height adjustment handle through the connection block center hole (621).

9. The height-adjusting device for a car seat according to claim 2, characterized in that A transmission disc positioning sleeve (64) is provided on a side surface of the transmission disc (6) away from the driving outer disc (51) and at a position corresponding to the center hole (61) of the transmission disc. The transmission disc positioning sleeve (64) forms a positioning sleeve convex ring (641) toward the center hole (12) of the outer cover shell, and the center shaft (7) passes through the positioning sleeve convex ring (641) and protrudes out of the center hole (12) of the outer cover shell.

10. The height-adjusting device for a car seat according to claim 3, characterized in that A center shaft positioning portion (73) is formed between the output gear (71) and the spline portion (72) of the center shaft (7), and the center shaft positioning portion (73) is arranged in the mounting plate bushing inner cavity (221) of the mounting plate bushing (22).

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