Angle stepless adjustment mechanism for seat armrest

Abstract

The present invention relates to an angle-stepless adjustment mechanism for a chair armrest, comprising a fixing plate, a support assembly rotatably mounted on the upper end of the fixing plate, a bracket rotatably mounted in the middle of the support assembly, the bracket being located below the support assembly, one end of the bracket being rotatably connected to the support assembly, and the other end of the bracket being rotatably mounted on a gear shaft; a longitudinal rack is fixedly mounted on the inner side of the fixing plate, and a gear mounted on the gear shaft meshes with the rack; the present invention also comprises a cable assembly, which locks the rotation of the gear shaft; after the gear shaft is rotated and unlocked by the cable assembly, force is applied to the support assembly to make it swing upward or downward relative to the fixing plate, and the support assembly pulls or pushes the bracket so that the end of the bracket moves upward or downward relative to the fixing plate through the gear shaft meshing with the rack, thereby adjusting the angle of the support assembly relative to the fixing plate, and the cable assembly locks the rotation of the gear shaft to fix the angle; the present invention realizes stepless adjustment of the angle, and the operation is simple, convenient and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of seats, in particular to an angle stepless adjustment mechanism for a seat armrest. Background Art

[0002] The angle setting of the seat armrest is an important parameter for seat comfort. In the prior art, the armrests of most seats have only two states: flat and folded. That is, the armrests can only stay in two positions relative to the seat and cannot be parked at other angles. When the seat back is adjusted to tilt forward or backward, the armrests also tilt forward or backward with the seat, which brings a lot of inconvenience to the driver and passengers and greatly reduces the comfort of the armrests. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned prior art, the applicant provides a rationally structured stepless angle adjustment mechanism for seat armrests, thereby realizing stepless angle adjustment, simple operation, convenient and reliable adjustment, good stability, and effectively helping to improve the comfort of seat use.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A stepless angle adjustment mechanism for a seat armrest comprises a fixed plate, a support assembly is rotatably mounted on the upper end of the fixed plate, a bracket is rotatably mounted on the middle part of the support assembly, the bracket is located below the support assembly, one end of the bracket is rotatably connected to the support assembly, and the other end of the bracket is rotatably mounted on a gear shaft; a longitudinal rack is fixedly mounted on the inner side of the fixed plate, and a gear mounted on the gear shaft meshes with the rack; a cable assembly is also included, which locks the rotation of the gear shaft.

[0006] As a further improvement of the above technical solution:

[0007] A fixing frame is fixedly mounted on the inner side of the fixing plate, and the cross-section of the fixing frame is a U-shaped structure. A rack is fixedly mounted on the inner bottom surface of the U-shaped structure of the fixing frame, and guide grooves are provided on two opposite wall surfaces that penetrate the fixing frame front and back, and the length direction of the guide groove is consistent with the length direction of the rack. The gear shaft penetrates the fixing frame front and back through the guide groove, and during the meshing transmission process of the gear relative to the rack, the gear shaft rotates and moves up and down relative to the guide groove.

[0008] A rubber gasket with a long strip structure is fitted in the guide groove.

[0009] The structure of the cable assembly is as follows: it includes a cable, one end of which is clamped with a transmission plate, the transmission plate swings driven by the button assembly, and the other end of the cable is clamped with a shift fork; the middle part of the shift fork is rotatably mounted on the side of the bracket, the front end of the shift fork is clamped with the cable, and the rear end of the shift fork is fixed with a spline sleeve; the end of the gear shaft extending out of the side of the bracket is provided with a spline part, and the spline sleeve is fitted with the spline part; when the cable pulls the shift fork to make it swing relative to the bracket, the spline sleeve is separated from the spline part.

[0010] The structure of the button assembly is as follows: it includes a support fixedly mounted at the lower front portion of the support assembly, a button seat is installed through the support from bottom to top, and the top of the button seat is fixed to the support by a barb structure; a button is installed through the button seat from bottom to top, and the top of the button is limitedly fixed to the button seat by a barb structure, and the top of the button passes upward into the interior of the support; a spring is also installed between the bottom surface of the button seat and the button.

[0011] A transmission plate is rotatably mounted on a support located above the top of the button, the middle part of the transmission plate is rotatably connected to the support through a rotating shaft, the front end of the transmission plate is located directly above the top of the button, and the rear end of the transmission plate is clamped with a cable; a torsion spring is also mounted on the rotating shaft, and the torsion spring allows the transmission plate to reset after swinging.

[0012] Both ends of the cable are provided with spherical structures, and both ends of the cable located inside the two spherical structures are provided with rope sleeves; the spherical structure at the front end of the cable is clamped with the transmission plate, the rope sleeve at the front end of the cable is clamped with the front end of the support component, the spherical structure at the rear end of the cable is clamped with the fork, and the rope sleeve at the rear end of the cable is clamped with the side wall of the bracket.

[0013] The structure of the support assembly is as follows: it includes a support rod and a support plate fixed at the front and rear, the rear end of the support plate is rotatably connected to the top end of the fixed plate, and the support plate located behind the support rod is rotatably connected to the bracket; a cable seat is fixed on the support rod, and the cable seat is clamped with the cable sleeve at the front end of the cable.

[0014] Side ears are symmetrically extended on the upper and lower parts of the side of the bracket, and a second rotating shaft is installed between the two side ears. The shift fork is mounted on the second rotating shaft, and the shift fork swings relative to the bracket through the second rotating shaft; the second rotating shaft is also mounted with a second torsion spring, which allows the shift fork to return to its original position after swinging.

[0015] The front end of the bracket is rotatably connected relative to the supporting assembly via a pin shaft.

[0016] The beneficial effects of the present invention are as follows:

[0017] The invention has a compact and reasonable structure and is easy to operate. After the rotation of the gear shaft is unlocked by the cable assembly, force is applied to the support assembly to make it swing upward or downward relative to the fixed plate. The support assembly pulls or pushes the bracket so that the end of the bracket moves upward or downward relative to the fixed plate through the gear shaft meshing with the rack. The gear shaft rotates with the gear, thereby adjusting the angle of the support assembly relative to the fixed plate, and the cable assembly locks the rotation of the gear shaft to fix the angle, thereby achieving the final angle adjustment, and the meshing of the gear rack realizes stepless adjustment. The operation is simple, fast and reliable, and the stability is good, which effectively helps to improve the comfort of seat use.

[0018] The present invention also includes the following advantages:

[0019] The guide groove on the side wall of the fixing frame provides a guide for the upward and downward movement of the gear shaft relative to the fixing frame and the fixing plate, thereby facilitating the realization of relative movement between the bracket and the fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 for Figure 1 A partial enlarged view of part A in the middle.

[0022] Figure 3 for Figure 1 Exploded diagram.

[0023] Among them: 1. button assembly; 2. cable assembly; 3. support assembly; 4. bracket; 5. gear shaft; 6. rack; 7. fixing frame; 8. fixing plate; 11. button; 12. spring; 13. button seat; 14. support; 20. rotating shaft one; 21. torsion spring one; 22. transmission plate; 23. cable seat; 24. cable; 25. torsion spring two; 26. rotating shaft two; 27. side ear; 28. shift fork; 29. ​​spline sleeve; 31. support plate; 32. support rod; 41. pin shaft; 51. spline part; 52. gear. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0025] like Figure 1 and Figure 2As shown, a stepless angle adjustment mechanism for a seat armrest of this embodiment includes a fixing plate 8, a support assembly 3 is rotatably mounted on the upper end of the fixing plate 8, a bracket 4 is rotatably mounted in the middle of the support assembly 3, the bracket 4 is located below the support assembly 3, one end of the bracket 4 is rotatably connected to the support assembly 3, and a gear shaft 5 is rotatably mounted on the other end of the bracket 4; a longitudinal rack 6 is fixedly mounted on the inner side of the fixing plate 8, and a gear 52 mounted on the gear shaft 5 is meshed with the rack 6; and a cable assembly 2 is also included, which locks the rotation of the gear shaft 5;

[0026] After the rotation of the gear shaft 5 is unlocked by the cable assembly 2, force is applied to the support assembly 3 to make it swing upward or downward relative to the fixed plate 8. The support assembly 3 pulls or pushes the bracket 4, so that the end of the bracket 4 moves up or down relative to the fixed plate 8 through the gear shaft 5 meshing with the rack 6. The gear shaft 5 rotates with the gear 52, thereby adjusting the angle of the support assembly 3 relative to the fixed plate 8, and the cable assembly 2 locks the rotation of the gear shaft 5 to fix the angle, thereby realizing the final angle adjustment, and the meshing of the gear 52 and the rack 6 realizes stepless adjustment.

[0027] A fixing frame 7 is fixedly installed on the inner side surface of the fixing plate 8. The cross-section of the fixing frame 7 is a U-shaped structure. A rack 6 is fixedly installed on the inner bottom surface of the U-shaped structure of the fixing frame 7. Guide grooves are provided on the two opposite walls of the fixing frame 7 that pass through the fixing frame 7 front and back. The length direction of the guide groove is consistent with the length direction of the rack 6. The gear shaft 5 passes through the fixing frame 7 front and back through the guide groove. During the meshing transmission process of the gear 52 relative to the rack 6, the gear shaft 5 rotates and moves up and down relative to the guide groove. The setting of the guide groove on the side wall of the fixing frame 7 provides a guiding effect for the gear shaft 5 to move up and down relative to the fixing frame 7 and the fixing plate 8, thereby facilitating the realization of relative movement between the bracket 4 and the fixing plate 8.

[0028] A rubber gasket with a long strip structure is embedded in the guide groove.

[0029] like Figure 3 As shown, the structure of the cable assembly 2 is as follows: it includes a cable 24, one end of which is clamped with a transmission plate 22, and the transmission plate 22 swings under the drive of the button assembly 1, and the other end of the cable 24 is clamped with a fork 28; the middle part of the fork 28 is rotatably installed with the side of the bracket 4, the front end of the fork 28 is clamped with the cable 24, and the rear end of the fork 28 is fixed with a spline sleeve 29; the end of the gear shaft 5 extending out of the side of the bracket 4 is provided with a spline portion 51, and the spline sleeve 29 is fitted with the spline portion 51; when the cable 24 pulls the fork 28 to make it swing relative to the bracket 4, the spline sleeve 29 is separated from the spline portion 51; the locking or unlocking of the rotation of the gear shaft 5 is achieved by the fitting or separation between the spline sleeve 29 and the spline portion 51.

[0030] The structure of the button assembly 1 is as follows: it includes a support 14 fixedly mounted at the lower front portion of the support assembly 3, a button seat 13 is installed through the support 14 from bottom to top, and the top of the button seat 13 is clamped and fixed to the support 14 by a barb structure; a button 11 is installed through the button seat 13 from bottom to top, and the top of the button 11 is clamped and limited by the button seat 13 by a barb structure, and the top of the button 11 penetrates upward into the interior of the support 14; a spring 12 is also installed between the bottom surface of the button seat 13 and the button 11, and the spring 12 is used to reset the button 11 relative to the support 14 after pressing is completed.

[0031] A transmission plate 22 is rotatably mounted on the support 14 located above the top of the button 11. The middle part of the transmission plate 22 is rotatably connected to the support 14 through a rotating shaft 20. The front end of the transmission plate 22 is located just above the top of the button 11, and the rear end of the transmission plate 22 is clamped with a cable 24. After the button 11 is pressed upward, the top of the button 11 moves upward and lifts the front end of the transmission plate 22, so that the transmission plate 22 swings relative to the support 14 with the rotating shaft 20 as the center, and the rear end of the transmission plate 22 moves downward and pulls the cable 24, and the cable 24 pulls the shift fork 28 to swing relative to the bracket 4, so that the spline sleeve 29 at the rear end of the shift fork 28 disengages from the spline portion 51 at the end of the gear shaft 5, and the rotational freedom of the gear shaft 5 is unlocked; a torsion spring 21 is also mounted on the rotating shaft 20, and the torsion spring 21 resets the transmission plate 22 after swinging.

[0032] Both ends of the cable 24 are provided with spherical structures, and both ends of the cable 24 located inside the two spherical structures are provided with rope sleeves; the spherical structure at the front end of the cable 24 is clamped with the transmission plate 22, the rope sleeve at the front end of the cable 24 is clamped with the front end of the support component 3, the spherical structure at the rear end of the cable 24 is clamped with the fork 28, and the rope sleeve at the rear end of the cable 24 is clamped with the side wall of the bracket 4.

[0033] The structure of the support assembly 3 is: it includes a support rod 32 and a support plate 31 fixed at the front and rear, the rear end of the support plate 31 is rotatably connected to the top of the fixed plate 8, and the support plate 31 located behind the support rod 32 is rotatably connected to the bracket 4; a cable seat 23 is fixed on the support rod 32, and the cable seat 23 is clamped with the cable sleeve at the front end of the cable 24.

[0034] Side ears 27 extend symmetrically from the upper and lower parts of the side of the bracket 4, and a rotating shaft 26 is installed between the two side ears 27. The shift fork 28 is mounted on the rotating shaft 26, and the shift fork 28 swings relative to the bracket 4 through the rotating shaft 26; the rotating shaft 26 is also mounted with a torsion spring 25, which allows the shift fork 28 to reset after swinging, and when the button assembly 1 is not triggered, the torsion spring 25 prevents the spline sleeve 29 from being disengaged from the spline portion 51 of the gear shaft 5.

[0035] The front end of the bracket 4 is rotatably connected relative to the supporting assembly 3 via a pin shaft 41 .

[0036] The use principle of the present invention is:

[0037] The button 11 is pressed upward, and the button 11 moves upward relative to the support 14. The spring 12 is compressed, and the top of the button 11 pushes the front end of the transmission plate 22 upward, so that the transmission plate 22 rotates relative to the support 14, and the rear end of the transmission plate 22 swings downward, thereby pulling the cable 24, and the cable 24 pulls the front end of the fork 28 to swing toward the direction of the bracket 4, so that the rear end of the fork 28 swings outward relative to the bracket 4, thereby driving the spline sleeve 29 to move outward, so that the spline sleeve 29 leaves the spline portion 51 at the end of the gear shaft 5, that is, the rotational freedom of the gear shaft 5 is released;

[0038] Synchronously, force is applied to the support assembly 3 to make it rotate relative to the fixed plate 8. Taking the case where the front end of the support assembly 3 swings upward relative to the fixed plate 8 as an example, the support assembly 3 pulls the bracket 4 via the pinion shaft 41, so that the rear end of the bracket 4 tends to move upward relative to the fixed frame 7. The gear 52 on the gear shaft 5 at the rear end of the bracket 4 meshes with the rack 6 for transmission. The gear 52 rotates while moving upward relative to the rack 6, thereby achieving the adjustment of the angle of the support assembly 3 relative to the fixed plate 8.

[0039] When the angle is adjusted to a suitable position, release the force applied to the support assembly 3 and then release the force of pressing the button 11. The button 11 moves downward and resets under the action of the spring 12, and the upward thrust applied to the bottom surface of the front end of the transmission plate 22 is released. Under the action of the restoring force of the torsion spring 1 21, the transmission plate 22 rotates and resets relative to the support 14, and the tension applied to the front end of the cable 24 is released. The force applied to the front end of the fork 28 by the cable 24 is released. Under the action of the torsion spring 25, the fork 28 rotates and resets relative to the bracket 4, so that the spline sleeve 29 fixed to the rear end of the fork 28 swings back and is again mounted on the spline portion 51 at the end of the gear shaft 5, thereby limiting the rotational freedom of the gear shaft 5, that is, making the bracket 4 and the support assembly 3 stationary relative to the fixed plate 8.

[0040] The invention is simple to operate, convenient and quick to use, realizes stepless adjustment of angle, and has high reliability and good stability.

[0041] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A stepless angle adjustment mechanism for a seat armrest, characterized in that: The invention comprises a fixing plate (8), wherein a support assembly (3) is rotatably mounted on the upper end of the fixing plate (8), a bracket (4) is rotatably mounted on the middle part of the support assembly (3), the bracket (4) is located below the support assembly (3), one end of the bracket (4) is rotatably connected to the support assembly (3), and a gear shaft (5) is rotatably mounted on the other end of the bracket (4); a longitudinal rack (6) is fixedly mounted on the inner side of the fixing plate (8), and a gear (52) mounted on the gear shaft (5) is meshed with the rack (6); and a cable assembly (2) is also included, and the cable assembly (2) locks the rotation of the gear shaft (5); a fixing frame (7) is fixedly mounted on the inner side surface of the fixing plate (8), the cross section of the fixing frame (7) is a U-shaped structure, and a gear is fixedly mounted on the inner bottom surface of the U-shaped structure of the fixing frame (7). The rack (6) is passed through the fixing frame (7) in front and back, and the two opposite walls thereof are provided with guide grooves, and the length direction of the guide groove is consistent with the length direction of the rack (6); the gear shaft (5) passes through the fixing frame (7) in front and back through the guide groove, and during the meshing transmission of the gear (52) relative to the rack (6), the gear shaft (5) rotates and moves up and down relative to the guide groove; a rubber gasket with a long strip structure is fitted in the guide groove; the structure of the cable assembly (2) is as follows: it includes a cable (24), one end of the cable (24) is clamped with a transmission plate (22), the transmission plate (22) swings under the drive of the button assembly (1), and the other end of the cable (24) is clamped with a shift fork (28); the middle part of the shift fork (28) rotates with the side of the bracket (4) The front end of the shift fork (28) is clamped with the cable (24), and the rear end of the shift fork (28) is fixedly mounted with a spline sleeve (29); the end of the gear shaft (5) extending out of the side of the bracket (4) is provided with a spline portion (51), and the spline sleeve (29) is fitted with the spline portion (51); when the cable (24) pulls the shift fork (28) to make it swing relative to the bracket (4), the spline sleeve (29) is separated from the spline portion (51); the structure of the button assembly (1) is as follows: it includes a support (14) fixedly mounted at the lower front part of the support assembly (3), and a button seat (13) is installed through the support (14) from bottom to top, and the top of the button seat (13) is clamped and fixed with the support (14) through a barb structure; the button seat (13) is clamped and fixed to the support (14) from bottom to top. A button (11) is installed, the top of the button (11) is limitedly clamped with a button seat (13) through a barbed structure, and the top of the button (11) penetrates upward into the inside of a support (14); a spring (12) is also installed between the bottom surface of the button seat (13) and the button (11); a transmission plate (22) is rotatably installed on the support (14) located above the top of the button (11), the middle part of the transmission plate (22) is rotatably connected with the support (14) through a rotating shaft (20), the front end of the transmission plate (22) is located just above the top of the button (11), and the rear end of the transmission plate (22) is clamped with a cable (24); a torsion spring (21) is also mounted on the rotating shaft (20), and the torsion spring (21) enables the transmission plate (22) to reset after swinging.

2. The stepless angle adjustment mechanism for a chair armrest according to claim 1, characterized in that: Both ends of the cable (24) are provided with spherical structures, and both ends of the cable (24) located inside the two spherical structures are provided with cable sleeves; the spherical structure at the front end of the cable (24) is clamped with the transmission plate (22), the cable sleeve at the front end of the cable (24) is clamped with the front end of the support component (3), the spherical structure at the rear end of the cable (24) is clamped with the shift fork (28), and the cable sleeve at the rear end of the cable (24) is clamped with the side wall of the bracket (4).

3. The stepless angle adjustment mechanism for a chair armrest according to claim 2, characterized in that: The structure of the support assembly (3) is as follows: it comprises a support rod (32) and a support plate (31) fixedly mounted at the front and rear ends; the rear end of the support plate (31) is rotatably connected to the top end of the fixed plate (8); the support plate (31) located behind the support rod (32) is rotatably connected to the bracket (4); a cable seat (23) is fixedly mounted on the support rod (32); the cable seat (23) is clamped with the cable sleeve at the front end of the cable (24).

4. The stepless angle adjustment mechanism for a chair armrest according to claim 1, characterized in that: Side ears (27) are symmetrically extended from the upper and lower parts of the side surface of the bracket (4); a second rotating shaft (26) is installed between the two side ears (27); the shift fork (28) is mounted on the second rotating shaft (26); the shift fork (28) swings relative to the bracket (4) through the second rotating shaft (26); a second torsion spring (25) is also mounted on the second rotating shaft (26); the second torsion spring (25) enables the shift fork (28) to return to its original position after swinging.

5. The stepless angle adjustment mechanism for a chair armrest according to claim 1, characterized in that: The front end of the bracket (4) is rotatably connected relative to the support assembly (3) via a pin shaft (41).

Images