Car seat height adjustment device

Abstract

The present invention discloses a car seat height gear adjustment device, comprising a seat guard assembly and a cable, the car seat height gear adjustment device also includes a bracket, an adjustment handle, a turntable, a rotating sleeve and a support shaft, the bracket is fixed on the seat guard assembly, the support shaft is movably arranged in the bracket, the turntable is rotatably arranged on the support shaft located on one side of the bracket, a hollow shaft is provided at the end of the turntable away from the bracket, the rotating sleeve is rotatably arranged on the outside of the hollow shaft, a ratchet structure is provided between the rotating sleeve and the turntable, a boss is provided at the end of the rotating sleeve away from the turntable, the other end of the traction line in the cable is connected to one side of the boss, one side of the adjustment handle is sleeved on the outside of the support shaft and is rotatably connected to the support shaft, the other side of the adjustment handle is sleeved on the outside of the hollow shaft and is transmission connected to the hollow shaft, and a circumferential limiting structure is provided between the rotating sleeve and the bracket; the present invention can bring convenience to the telescopic control of the piston rod of the air valve.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile seats, and in particular to a height gear adjusting device for an automobile seat. Background Art

[0002] Car seats are indispensable parts in cars. In order to adapt to the height of the driver and passengers during use, all car seats on the market have the function of height adjustment. The height adjustment of car seats currently used in buses and trucks is achieved by relying on air valves and air bags set in the car seats. The air valve is connected to the air bag. When the piston rod in the air valve is pulled outward to generate negative pressure in the air bag, the height of the car seat can be reduced. When the piston rod in the air valve is retracted inward to reduce the negative pressure in the air bag, the height of the car seat can be increased. That is, by controlling the air bag, the car seat is adjusted to the desired height. The extension and retraction of the valve piston rod can adjust the height of the car seat; currently, the extension and retraction control of the valve piston rod is achieved by a knob arranged on the side wall of the car seat. When the knob is turned to reel in the cable connecting the knob and the valve piston rod, the valve piston rod can be pulled outward. When the knob is rotated to release the cable connecting the knob and the valve piston rod, the valve piston rod can be retracted into the valve. However, by using a knob to control the extension and retraction of the valve piston rod, there are disadvantages of being troublesome to control the valve piston rod and the difficulty in adjusting the height of the car seat. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a vehicle seat height gear adjustment device, which can facilitate the telescopic control of the piston rod of the air valve and can facilitate the height adjustment of the vehicle seat.

[0004] The car seat height gear adjustment device of the present invention includes a seat guard assembly and a cable. The seat guard assembly is fixed to one side of the car seat, one end of the outer sleeve in the cable is connected to the car seat height adjustment valve in the car seat, and one end of the traction line in the cable is connected to the piston rod in the car seat height adjustment valve. The car seat height gear adjustment device also includes a bracket, an adjustment handle, a turntable, a rotating sleeve and a support shaft. The bracket is fixed on the seat guard assembly, the support shaft is movably inserted into the bracket, the turntable is rotatably mounted on the support shaft located on one side of the bracket, a hollow shaft is provided at one end of the turntable away from the bracket, the hollow shaft is rotatably mounted on the support shaft, the rotating sleeve is rotatably mounted on the outside of the hollow shaft, a ratchet structure is provided between the rotating sleeve and the turntable, and a traction member for winding up the cable is provided at one end of the rotating sleeve away from the turntable. The boss of the lead wire, the other end of the traction wire in the cable is connected to one side of the boss, the other end of the outer sleeve in the cable is connected to the bracket, one side of the adjusting handle is sleeved on the outside of the support shaft and is rotatably connected to the support shaft, the other side of the adjusting handle is sleeved on the outside of the hollow shaft and is transmission connected to the hollow shaft, a circumferential limiting structure is provided between the rotating sleeve and the bracket, when the adjusting handle is toggled toward one side, the adjusting handle is used to drive the hollow shaft and the turntable to rotate so that the ratchet structure toggles the rotating sleeve to rotate toward one side, and when the adjusting handle is toggled toward the other side, the adjusting handle is used to drive the hollow shaft and the turntable to rotate so that the ratchet structure toggles the rotating sleeve to rotate toward the other side, when the rotating sleeve rotates relative to the bracket, the boss is used to reel in or release the traction wire, and when the rotating sleeve rotates relative to the bracket, the circumferential limiting structure is used to lock the rotating sleeve to prevent the rotating sleeve from rotating freely relative to the bracket.

[0005] The car seat height gear adjustment device of the present invention comprises a ratchet structure including a torsion spring, a spring sheet and two ratchet blocks, a plurality of circumferentially distributed tooth grooves are provided on the inner wall of the rotating sleeve, and the plurality of tooth grooves are arranged to form a "C"-shaped structure, and the two ratchet blocks are symmetrically arranged along the radial direction of the rotating sleeve, the inner ends of the two ratchet blocks are both rotatably connected to the turntable, the middle part of the spring sheet is connected to the turntable, the two ends of the spring sheet are respectively abutted against the inner side of the outer end of one of the ratchet blocks, and the two ends of the spring sheet are respectively used to push the outer end of one of the ratchet blocks so that the outer end of the ratchet block is engaged with the tooth groove; two push blocks are provided on the bracket, and when the turntable rotates to one side When the rotary disk is rotated to the other side, the other push block is used to push the outer end of the ratchet block on its side to make the outer end of the ratchet block disengage from the tooth groove; when the rotary disk is rotated to the other side, the other push block is used to push the outer end of the ratchet block on its side to make the outer end of the ratchet block disengage from the tooth groove; the torsion spring is sleeved on the outside of the hollow shaft, and a first protrusion is provided on the side wall of the rotary disk, and a second protrusion is provided on the bracket, and the first protrusion and the second protrusion are both engaged between the two ends of the torsion spring, and when the adjusting handle is released, the torsion spring is used to drive the rotary disk and the adjusting handle to rotate and reset; by adopting this ratchet structure, when the adjusting handle is toggled toward one side, one of the push blocks can push the ratchet block on its side The outer end of the tooth block causes the outer end of the ratchet block to disengage from the tooth groove. In this state, since the other ratchet block is in a state of mating engagement with the tooth groove on the inner wall of the rotating sleeve, the rotating sleeve can be rotated under the drive of the other ratchet block, and when the rotating sleeve rotates, the boss can realize the winding of the traction line in the cable; similarly, when the adjusting handle is toggled toward the other side, the other push block can push the outer end of the ratchet block on the side to disengage from the tooth groove. In this state, since one of the ratchet blocks is in a state of mating engagement with the tooth groove on the inner wall of the rotating sleeve, the rotating sleeve can be rotated under the drive of one of the ratchet blocks, and when the rotating sleeve rotates, the boss can realize the winding of the traction line in the cable. When the rotating sleeve rotates, the boss can release the traction line in the cable; furthermore, when the adjusting handle is released, the turntable and the adjusting handle can be rotated and reset under the action of the torsion spring. At the same time, after the rotating sleeve rotates relative to the bracket, the rotating sleeve can be locked under the action of the circumferential limiting structure to prevent the rotating sleeve from rotating freely relative to the bracket; in addition, by arranging a number of teeth and grooves to form a "C"-shaped structure, when the boss reels or releases the traction line to the limit state, that is, when the rotating sleeve rotates to one side to the limit state, the ratchet block located at the opening of the "C"-shaped structure can slip with the inner wall of the rotating sleeve, thereby preventing the rotating sleeve from excessive rotation.

[0006] The car seat height gear adjustment device of the present invention has a positioning pin on the turntable, and the middle part of the spring sheet is sleeved on the outside of the positioning pin and tightly embraced by the positioning pin; by adopting this structure, the spring sheet can be reliably and conveniently connected to the turntable.

[0007] The automobile seat height gear adjustment device of the present invention is characterized in that an axial hole is provided on the inner end portion of each ratchet block, a pin shaft corresponding to each axial hole is provided on the turntable, each pin shaft is inserted into the axial hole at the corresponding position, and each ratchet block is rotatably connected to the pin shaft at the corresponding position; by adopting this structure, the inner end portion of each ratchet block can be reliably rotatably connected to the turntable.

[0008] The automobile seat height gear adjustment device of the present invention comprises an annular protrusion with an outer peripheral wall in the shape of a regular hexagon on the outer end portion of the hollow shaft, and an embedding hole in the shape of a regular hexagon on the other side of the adjustment handle, in which the annular protrusion is embedded. By adopting this structure, the hollow shaft and the adjustment handle can reliably achieve the purpose of circumferential limitation, so that when the adjustment handle is rotated, the adjustment handle can reliably drive the hollow shaft and the turntable to rotate.

[0009] The automobile seat height gear adjustment device of the present invention, wherein the circumferential limiting structure includes an adjusting bolt, a spring and a steel ball, a plurality of circumferentially distributed embedding grooves are provided on the outer wall of the rotating sleeve, and the plurality of embedding grooves are arranged to form a "C"-shaped structure, a through hole is provided on the bracket, the adjusting bolt is threadedly connected to the outer end of the through hole, the steel ball is provided at the inner end of the through hole and slidably connected to the through hole, the spring is provided in the through hole and the two ends of the spring are respectively against the adjusting bolt and the steel ball, and the spring is used to push the steel ball so that the steel ball is embedded in one of the embedding grooves; by adopting this circumferential limiting structure, after the rotating sleeve rotates, the steel ball can be engaged with the adjusting bolt under the action of the spring. The embedding grooves at the corresponding positions are engaged, thereby preventing the rotating sleeve from rotating freely relative to the bracket. After the rotating sleeve rotates to a certain angle, the steel ball can be engaged with the next embedding groove. Furthermore, by turning the adjusting bolt, the elastic force applied by the spring on the steel ball can be adjusted (when the spring is compressed, the elastic force applied by the spring on the steel ball increases, and when the spring is extended, the elastic force applied by the spring on the steel ball decreases), thereby adjusting the locking force applied by the circumferential limit structure to the rotating sleeve; in addition, by arranging a number of embedding grooves to form a "C" shape structure, after the rotating sleeve rotates to the limit state, the steel ball can slip on the outer wall of the rotating sleeve to prevent the rotating sleeve from over-rotating.

[0010] The automobile seat height adjustment device of the present invention is characterized in that an annular step is provided on the edge of one side of the bracket, and the rotating sleeve is engaged with the annular step at one end facing the bracket and is rotatably connected to the annular step; by adopting this structure, the rotating sleeve can be further limited to improve the coaxiality of the rotating sleeve and the turntable, thereby ensuring that the ratchet structure can reliably drive the rotating sleeve to rotate.

[0011] The car seat height gear adjustment device of the present invention is characterized in that a first slot is provided on the bracket, and the other end of the outer sleeve in the cable is engaged with the first slot; the bracket is provided with a wire groove for inserting the traction wire in the cable and guiding the traction wire; through the provision of the first slot, the other end of the outer sleeve in the cable can be reliably connected to the bracket, and through the provision of the wire groove, the wire groove can guide the traction wire.

[0012] The car seat height gear adjustment device of the present invention has a second slot provided on the side wall of the boss, and the other end of the traction line in the cable is engaged with the second slot; through the provision of the second slot, the other end of the traction line in the cable can be reliably connected to one side of the boss.

[0013] The automobile seat height gear adjustment device of the present invention is characterized in that a limit block is provided on the outer wall of the rotating sleeve. When the rotating sleeve rotates to completely release the traction line wound on the boss, the limit block is used to abut against the bracket. By adopting this structure, after operating the adjustment handle to completely release the traction line from the boss on the rotating sleeve, if the adjustment handle is continued to be operated, the limit block can abut against the bracket, that is, the rotating sleeve can be prevented from rotating excessively, thereby preventing the boss from reversely winding the traction line.

[0014] During use of the present invention, it is only necessary to toggle the adjustment handle to make the boss on the rotating sleeve reel in or release the traction line in the cable. When the traction line is reeled in or released, the extension and retraction of the piston rod of the air valve can be controlled. Compared with the traditional method of using a knob to control the reeling and releasing of the traction line, it can bring convenience to the extension and retraction control of the piston rod of the air valve and can also bring convenience to the height adjustment of the car seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention after removing the cable;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention after removing the cable and seat guard assembly;

[0019] Figure 4 This is a schematic diagram of the exploded three-dimensional structure of the first part of the present invention after removing the cable and the seat guard assembly;

[0020] Figure 5This is a schematic diagram of the exploded three-dimensional structure of the second part of the present invention after removing the cable and the seat guard assembly;

[0021] Figure 6 This is a schematic cross-sectional view of the present invention after removing the cable and seat guard assembly. DETAILED DESCRIPTION

[0022] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details are included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0023] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] like Figure 1-6As shown, the car seat height gear adjustment device of the present invention includes a seat guard assembly 1 and a cable 2, the seat guard assembly 1 is fixed to one side of the car seat, one end of the outer sleeve 21 in the cable 2 is connected to the car seat height adjustment valve in the car seat, and one end of the traction line 22 in the cable 2 is connected to the piston rod in the car seat height adjustment valve. The car seat height gear adjustment device also includes a bracket 3, an adjustment handle 4, a turntable 5, a rotating sleeve 6 and a support shaft 7. The bracket 3 is fixed on the seat guard assembly 1, and the support shaft 7 is movably inserted into the bracket 3. The turntable 5 is rotatably mounted on the support shaft 7 located on one side of the bracket 3. A hollow shaft 51 is provided at one end of the turntable 5 away from the bracket 3. The hollow shaft 51 is rotatably mounted on the support shaft 7. The rotating sleeve 6 is rotatably mounted on the outside of the hollow shaft 51. A ratchet structure is provided between the rotating sleeve 6 and the turntable 5, and a traction line 2 in the cable 2 is provided at one end of the rotating sleeve 6 away from the turntable 5. When the adjusting handle 4 is toggled toward one side, the adjusting handle 4 is used to drive the hollow shaft 51 and the turntable 5 to rotate so that the ratchet structure toggles the rotating sleeve 6 to rotate toward one side. When the adjusting handle 4 is toggled toward the other side, the adjusting handle 4 is used to drive the hollow shaft 51 and the turntable 5 to rotate so that the ratchet structure toggles the rotating sleeve 6 to rotate toward the other side. When the rotating sleeve 6 rotates relative to the bracket 3, the boss 61 is used to reel in or release the traction line 22. After the rotating sleeve 6 rotates relative to the bracket 3, the circumferential limiting structure is used to lock the rotating sleeve 6 to prevent the rotating sleeve 6 from rotating freely relative to the bracket 3.

[0025] The ratchet structure includes a torsion spring 81, a spring sheet 82 and two ratchet blocks 83. A plurality of circumferentially distributed tooth grooves 62 are provided on the inner wall of the rotating sleeve 6. The plurality of tooth grooves 62 are arranged to form a "C"-shaped structure. The two ratchet blocks 83 are symmetrically arranged along the radial direction of the rotating sleeve 6. The inner ends of the two ratchet blocks 83 are both rotatably connected to the turntable 5. The middle part of the spring sheet 82 is connected to the turntable 5. The two ends of the spring sheet 82 are respectively abutted against the inner side of the outer end of one of the ratchet blocks 83. The two ends of the spring sheet 82 are respectively used to push the outer end of one of the ratchet blocks 83 so that the outer end of the ratchet block 83 is engaged with the tooth groove 62; two push blocks 31 are provided on the bracket 3. When the turntable 5 moves toward one When the rotary disk 5 rotates to the other side, one of the push blocks 31 is used to push the outer end of the ratchet block 83 on its side to disengage the outer end of the ratchet block 83 from the tooth groove 62. When the rotary disk 5 rotates to the other side, the other push block 31 is used to push the outer end of the ratchet block 83 on its side to disengage the outer end of the ratchet block 83 from the tooth groove 62. The torsion spring 81 is sleeved on the outside of the hollow shaft 51. The side wall of the rotary disk 5 is provided with a first protrusion 52, and the bracket 3 is provided with a second protrusion 32. The first protrusion 52 and the second protrusion 32 are both engaged between the two ends of the torsion spring 81. When the adjusting handle 4 is released, the torsion spring 81 is used to drive the rotary disk 5 and the adjusting handle 4 to rotate and reset. By adopting this ratchet structure, when When the adjusting handle is toggled to one side, one of the pushing blocks can push the outer end of the ratchet block on that side to disengage the outer end of the ratchet block from the tooth groove. In this state, since the other ratchet block is in a mating engagement with the tooth groove on the inner wall of the rotating sleeve, the rotating sleeve can rotate under the drive of the other ratchet block, and when the rotating sleeve rotates, the boss can wind up the traction line in the cable. Similarly, when the adjusting handle is toggled to the other side, the other pushing block can push the outer end of the ratchet block on that side to disengage the outer end of the ratchet block from the tooth groove. In this state, since one of the ratchet blocks is in a mating engagement with the tooth groove on the inner wall of the rotating sleeve, the rotating sleeve can be in The rotating sleeve rotates under the drive of a ratchet block, and when the rotating sleeve rotates, the boss can release the traction line in the cable; furthermore, when the adjusting handle is released, the turntable and the adjusting handle can be rotated and reset under the action of the torsion spring. At the same time, after the rotating sleeve rotates relative to the bracket, the rotating sleeve can be locked under the action of the circumferential limiting structure to prevent the rotating sleeve from rotating freely relative to the bracket; in addition, by arranging a number of teeth and grooves to form a "C"-shaped structure, when the boss reels or releases the traction line to the limit state, that is, when the rotating sleeve rotates to one side to the limit state, the ratchet block located at the opening of the "C"-shaped structure can slip with the inner wall of the rotating sleeve, thereby preventing the rotating sleeve from rotating excessively.

[0026] A positioning pin 53 is provided on the turntable 5, and the middle portion of the spring sheet 82 is sleeved on the outside of the positioning pin 53 and tightly embraced by the positioning pin 53; by adopting this structure, the spring sheet can be reliably and conveniently connected to the turntable.

[0027] An axial hole 831 is provided on the inner end portion of each ratchet block 83, and a pin shaft 54 ​​corresponding to each axial hole 831 is provided on the turntable 5. Each pin shaft 54 ​​is inserted into the axial hole 831 at the corresponding position, and each ratchet block 83 is rotatably connected to the pin shaft 54 ​​at the corresponding position; by adopting this structure, the inner end portion of each ratchet block can be reliably connected to the turntable for rotation.

[0028] An annular protrusion 511 with a regular hexagonal outer wall is provided on the outer end of the hollow shaft 51, and a regular hexagonal embedding hole 41 is provided on the other side of the adjusting handle 4, and the annular protrusion 511 is embedded in the embedding hole 41; by adopting this structure, the purpose of circumferential limitation can be reliably achieved between the hollow shaft and the adjusting handle, so that when the adjusting handle is rotated, the adjusting handle can reliably drive the hollow shaft and the turntable to rotate.

[0029] The circumferential limiting structure includes an adjusting bolt 91, a spring 92 and a steel ball 93. A plurality of circumferentially distributed embedding grooves 63 are provided on the outer wall of the rotating sleeve 6. The plurality of embedding grooves 63 are arranged to form a "C"-shaped structure. A through hole 33 is provided on the bracket 3. The adjusting bolt 91 is threadedly connected to the outer end of the through hole 33. The steel ball 93 is arranged at the inner end of the through hole 33 and is slidably connected to the through hole 33. The spring 92 is arranged in the through hole 33 and the two ends of the spring 92 are respectively against the adjusting bolt 91 and the steel ball 93. The spring 92 is used to push the steel ball 93 so that the steel ball 93 is partially embedded in one of the embedding grooves 63. After adopting this circumferential limiting structure, after the rotating sleeve rotates, the steel ball 93 The ball can be engaged with the embedding groove at the corresponding position under the action of the spring, thereby preventing the rotating sleeve from rotating freely relative to the bracket. After the rotating sleeve rotates to a certain angle, the steel ball can be engaged with the next embedding groove. Furthermore, by turning the adjusting bolt, the elastic force applied by the spring to the steel ball can be adjusted (when the spring is compressed, the elastic force applied by the spring to the steel ball increases, and when the spring is extended, the elastic force applied by the spring to the steel ball decreases), thereby adjusting the locking force applied by the circumferential limit structure to the rotating sleeve; in addition, by arranging a plurality of embedding grooves to form a "C" shape structure, after the rotating sleeve rotates to the limit state, the steel ball can slip on the outer wall of the rotating sleeve to prevent the rotating sleeve from over-rotating.

[0030] An annular step 34 is provided at the edge of one side of the bracket 3, and the rotating sleeve 6 is engaged with the annular step 34 at one end facing the bracket 3 and is rotatably connected to the annular step 34; by adopting this structure, further limiting the rotating sleeve can be achieved to improve the coaxiality of the rotating sleeve and the turntable, thereby ensuring that the ratchet structure can reliably drive the rotating sleeve to rotate.

[0031] A first card slot 35 is provided on the bracket 3, and the other end of the outer sleeve 21 in the cable 2 is engaged with the first card slot 35; a wire groove 36 is provided on the bracket 3 for embedding the traction wire 22 in the cable 2 and guiding the traction wire 22; through the setting of the first card slot, the other end of the outer sleeve in the cable can be reliably connected to the bracket, and through the setting of the wire groove, the wire groove can guide the traction wire.

[0032] A second slot 64 is provided on the side wall of the boss 61 , and the other end of the traction line 22 in the cable 2 engages with the second slot 64 ; through the provision of the second slot, the other end of the traction line in the cable can be reliably connected to one side of the boss.

[0033] A limit block 65 is provided on the outer wall of the rotating sleeve 6. When the rotating sleeve 6 rotates so that the traction line 22 wound on the boss 61 is completely released, the limit block 65 is used to abut against the bracket 3. By adopting this structure, when the adjusting handle is operated to make the boss on the rotating sleeve completely release the traction line, if the adjusting handle is continued to be operated, the limit block can abut against the bracket, that is, the rotating sleeve can be prevented from rotating excessively, thereby preventing the boss from reversely winding the traction line.

[0034] When the adjusting handle is turned to one side, the adjusting handle can drive the hollow shaft and the turntable to rotate so that the ratchet structure drives the rotating sleeve to rotate to one side. When the rotating sleeve rotates to one side, the boss on the rotating sleeve can reel in the traction line so that the traction line pulls the piston rod on the air valve. At this time, the height of the car seat can be lowered (when the piston rod in the air valve is pulled outward to generate negative pressure in the airbag, the height of the car seat can be reduced); when the adjusting handle is turned to the other side, the adjusting handle can drive the hollow shaft and the turntable to rotate so that the ratchet structure drives the rotating sleeve to rotate to When the cam is in the airbag, the cam is released and the cam is released, so that the cam is released and the cam is in the airbag, the cam is released, and the cam is in the airbag, the cam is released, and the cam is in the airbag, the cam is released, and the cam is in the airbag, the cam is in the airbag, the cam is in the airbag, and ...

[0035] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A vehicle seat height adjustment device, comprising a seat guard assembly (1) and a cable (2), wherein the seat guard assembly (1) is fixed to one side of a vehicle seat, one end of an outer sleeve (21) in the cable (2) is connected to a vehicle seat height adjustment valve in the vehicle seat, and one end of a traction line (22) in the cable (2) is connected to a piston rod in the vehicle seat height adjustment valve, characterized in that: The vehicle seat height gear adjustment device further comprises a bracket (3), an adjustment handle (4), a turntable (5), a rotating sleeve (6) and a support shaft (7), wherein the bracket (3) is fixed on the seat guard assembly (1), the support shaft (7) is movably arranged in the bracket (3), the turntable (5) is rotatably sleeved on the support shaft (7) located on one side of the bracket (3), and a hollow shaft (51) is provided at one end of the turntable (5) away from the bracket (3), and the hollow shaft (51) is rotatably sleeved on the support shaft (7) located on one side of the bracket (3). The rotating sleeve (6) is sleeved on the support shaft (7), and can be rotatably sleeved on the outside of the hollow shaft (51). A ratchet structure is provided between the rotating sleeve (6) and the turntable (5). The end of the rotating sleeve (6) away from the turntable (5) is provided with a boss (61) for winding the traction line (22) in the cable (2). The other end of the traction line (22) in the cable (2) is connected to one side of the boss (61). The other end of the outer sleeve (21) in the cable (2) is connected to the bracket (3). The adjusting handle (4) is connected to the support shaft (7), one side of the adjusting handle (4) is sleeved on the outside of the support shaft (7) and is rotatably connected to the support shaft (7), the other side of the adjusting handle (4) is sleeved on the outside of the hollow shaft (51) and is transmission-connected to the hollow shaft (51), a circumferential limiting structure is provided between the rotating sleeve (6) and the bracket (3), and when the adjusting handle (4) is toggled toward one side, the adjusting handle (4) is used to drive the hollow shaft (51) and the rotating disk (5) to rotate so that the ratchet structure toggles the rotating sleeve (6) to rotate toward one side. When the adjusting handle (4) is moved toward the other side, the adjusting handle (4) is used to drive the hollow shaft (51) and the rotating disk (5) to rotate so that the ratchet structure drives the rotating sleeve (6) to rotate toward the other side. When the rotating sleeve (6) rotates relative to the bracket (3), the boss (61) is used to reel in or release the traction line (22). After the rotating sleeve (6) rotates relative to the bracket (3), the circumferential limiting structure is used to lock the rotating sleeve (6) to prevent the rotating sleeve (6) from freely rotating relative to the bracket (3).

2. The vehicle seat height adjustment device according to claim 1, characterized in that: The ratchet structure includes a torsion spring (81), a spring sheet (82) and two ratchet blocks (83). A plurality of circumferentially distributed tooth grooves (62) are provided on the inner wall of the rotating sleeve (6). The plurality of tooth grooves (62) are arranged to form a "C"-shaped structure. The two ratchet blocks (83) are symmetrically arranged along the radial direction of the rotating sleeve (6). The inner ends of the two ratchet blocks (83) are both rotatably connected to the turntable (5). The middle part of the spring sheet (82) is connected to the turntable (5). The two ends of the spring sheet (82) are respectively abutted against the inner side of the outer end of one of the ratchet blocks (83). The two ends of the spring sheet (82) are respectively used to push the outer end of one of the ratchet blocks (83) so that the outer end of the ratchet block (83) is engaged with the tooth groove (62). Two push blocks (31) are provided on the bracket (3). When the turntable ( 5) when rotating toward one side, one of the push blocks (31) is used to push the outer end of the ratchet block (83) on the side thereof so that the outer end of the ratchet block (83) is disengaged from the tooth groove (62); when the turntable (5) is rotated toward the other side, the other push block (31) is used to push the outer end of the ratchet block (83) on the side thereof so that the outer end of the ratchet block (83) is disengaged from the tooth groove (62); the torsion spring (81) is sleeved on the outside of the hollow shaft (51); a first protrusion (52) is provided on the side wall of the turntable (5); a second protrusion (32) is provided on the bracket (3); the first protrusion (52) and the second protrusion (32) are both engaged between the two ends of the torsion spring (81); when the adjusting handle (4) is released, the torsion spring (81) is used to drive the turntable (5) and the adjusting handle (4) to rotate and reset.

3. The vehicle seat height adjustment device according to claim 2, characterized in that: A positioning pin (53) is provided on the rotating disk (5), and the middle portion of the spring sheet (82) is sleeved on the outside of the positioning pin (53) and is tightly held by the positioning pin (53).

4. The vehicle seat height adjustment device according to claim 2, characterized in that: An axial hole (831) is provided on the inner end portion of each ratchet block (83), and a pin shaft (54) corresponding to each axial hole (831) is provided on the turntable (5), and each pin shaft (54) is inserted into the axial hole (831) at a corresponding position, and each ratchet block (83) is rotatably connected to the pin shaft (54) at the corresponding position.

5. The vehicle seat height adjustment device according to any one of claims 1 to 4, characterized in that: An annular projection (511) having an outer peripheral wall in the shape of a regular hexagon is provided on the outer end of the hollow shaft (51), and an embedding hole (41) in the shape of a regular hexagon is provided on the other side of the adjustment handle (4), and the annular projection (511) is embedded in the embedding hole (41).

6. The vehicle seat height adjustment device according to any one of claims 1 to 4, characterized in that: The circumferential limiting structure includes an adjusting bolt (91), a spring (92) and a steel ball (93). The outer wall of the rotating sleeve (6) is provided with a plurality of circumferentially distributed embedded grooves (63), and the plurality of embedded grooves (63) are arranged to form a "C"-shaped structure. The bracket (3) is provided with a through hole (33). The adjusting bolt (91) is threadedly connected to the outer end of the through hole (33). The steel ball (93) is arranged at the inner end of the through hole (33) and is slidably connected to the through hole (33). The spring (92) is arranged in the through hole (33) and the two ends of the spring (92) are respectively against the adjusting bolt (91) and the steel ball (93). The spring (92) is used to push the steel ball (93) so that the steel ball (93) is partially embedded with one of the embedded grooves (63).

7. The vehicle seat height adjustment device according to any one of claims 1 to 4, characterized in that: An annular step (34) is provided at the edge of one side of the bracket (3), and one end of the rotating sleeve (6) facing the bracket (3) is engaged with the annular step (34) and is rotatably connected to the annular step (34).

8. The vehicle seat height adjustment device according to any one of claims 1 to 4, characterized in that: The bracket (3) is provided with a first slot (35), and the other end of the outer sleeve (21) in the cable (2) is engaged with the first slot (35); the bracket (3) is provided with a wire groove (36) for embedding the traction wire (22) in the cable (2) and guiding the traction wire (22).

9. The vehicle seat height adjustment device according to any one of claims 1 to 4, characterized in that: A second slot (64) is provided on the side wall of the boss (61), and the other end of the traction line (22) in the cable (2) is engaged with the second slot (64).

10. The vehicle seat height adjustment device according to any one of claims 1 to 4, characterized in that: A limit block (65) is provided on the outer wall of the rotating sleeve (6). When the rotating sleeve (6) rotates to completely release the traction line (22) wound on the boss (61), the limit block (65) is used to abut against the bracket (3).

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