Stepless adjustment mechanism for seat armrest angle

Abstract

The present invention relates to a stepless adjustment mechanism for the angle of a chair armrest, comprising a fixing plate, a supporting plate being rotatably mounted on the upper end of the fixing plate, and a slide rail being rotatably mounted on the lower end of the fixing plate; the rear end of the supporting plate is rotatably connected to the fixing plate, a supporting seat is fixedly mounted below the front end of the supporting plate, a rotation-to-linear conversion mechanism is installed between the supporting seat and the slide rail, and the distance between the supporting seat and the slide rail is adjusted by the rotation-to-linear conversion mechanism; the present invention also includes a locking mechanism, which locks the rotation of the rotation-to-linear conversion mechanism; the locking mechanism unlocks the rotation of the rotation-to-linear conversion mechanism by pressing a button, and a force is simultaneously applied to the supporting plate to rotate it relative to the fixing plate, and the supporting plate is pulled or pushed by the supporting seat to make the rotation-to-linear conversion mechanism move relative to the length direction of the slide rail, thereby realizing the angle adjustment of the support plate, i.e., the chair armrest. The present invention realizes stepless adjustment of the angle, is convenient and reliable to operate, has good stability, and provides a good user experience.

Description

Technical Field

[0001] The invention relates to the technical field of seats, in particular to a stepless adjustment mechanism for the angle of 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 existing production technology, the applicant provides a rationally structured stepless adjustment mechanism for the seat armrest angle, thereby realizing stepless adjustment of the seat armrest angle, which is simple and convenient to operate, has high reliability and good stability, and effectively improves the comfort of armrest use.

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

[0005] A stepless adjustment mechanism for the angle of a seat armrest comprises a fixed plate, a support plate is rotatably mounted on the upper end of the fixed plate, and a slide rail is rotatably mounted on the lower end of the fixed plate; the rear end of the support plate is rotatably connected to the fixed plate, a support seat is fixedly mounted below the front end of the support plate, a rotation-linear conversion mechanism is installed between the support seat and the slide rail, and the distance between the support seat and the slide rail is adjusted by the rotation-linear conversion mechanism; and a locking mechanism is also included, which locks the rotation of the rotation-linear conversion mechanism.

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

[0007] The structure of the locking mechanism is as follows: it includes a lever 1 rotatably installed at the front end above the support seat, a button assembly is installed from bottom to top through the support seat, and the top of the button assembly is in contact with the front end of the bottom of the lever 1; a lever 2 is installed behind the lever 1, a cable is installed between the rear end of the lever 1 and the lever 2, and a stopper is installed on the lever 2, which locks the rotation of the rotation-linear conversion mechanism.

[0008] The second lever is arranged longitudinally, the top end of the second lever is clamped with the cable, and the bottom end of the second lever is clamped with a rotation-stopping member, and the rotation-stopping member is a spline sleeve;

[0009] A nut is fixedly installed on the side of the slide rail, and a screw rod is spirally installed through the nut. The length direction of the screw rod is consistent with the length direction of the slide rail. A spline part matching the spline sleeve is provided at the front end of the screw rod. The nut and the screw rod constitute a rotation-linear conversion mechanism, and an axial limiting mechanism is also installed between the support seat and the front end of the screw rod.

[0010] The middle part of the lever two is rotatably connected to the support seat via a pin shaft, and a torsion spring is mounted on the outer circumferential surface of the pin shaft. One end of the torsion spring is clamped on the lever two, and the other end of the torsion spring is clamped on the lever one; the lever one is arranged horizontally, and the middle part of the lever one is rotatably connected to the support seat via another pin shaft.

[0011] The structure of the axial limiting mechanism is as follows: it includes a screw seat fixed to the rear end of the support seat, the front end of the screw passes through the screw seat, a sleeve is installed between the screw seat and the screw, and a groove is opened along the circumferential direction on the screw located in front of the sleeve, and a retaining spring is installed in the groove.

[0012] The second lever is arranged horizontally, the rear end of the second lever is clamped with the cable, and a rotation-stopping member is installed on the bottom surface of the rear end of the second lever, and the rotation-stopping member is a toothed plate;

[0013] A pinion is rotatably mounted at the end of the slide rail, a rack is arranged along the length direction in the slide rail below the pinion, the top of the pinion is meshed with the toothed plate, and the bottom of the pinion is meshed with the rack, and the pinion and the rack constitute a rotation-linear conversion mechanism;

[0014] A supporting plate is rotatably mounted on the rear end of the support seat, the front end of the rack is fixedly mounted on the supporting plate, and the rear end of the rack is supported by a slide rail.

[0015] The front end of the second lever is rotatably connected to the supporting plate, and the middle part of the first lever is rotatably connected to the supporting seat.

[0016] The cable is located above the support plate, and both ends of the cable penetrate the support plate downward; 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 lever one, the rope sleeve at the front end of the cable is clamped with the front end of the support plate, and the spherical structure at the rear end of the cable is clamped with lever two; a through hole is opened on the support plate for the rear end of the cable to pass through, and the rope sleeve at the rear end of the cable is clamped with the buckle at the edge of the through hole.

[0017] The structure of the button assembly is as follows: it includes a button seat that passes through the support seat from bottom to top, and the top of the button seat is fixed to the support seat 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 the barb structure, and the top end of the button is in contact with the bottom surface of a lever; a spring is also installed between the button and the button seat.

[0018] The upper end of the fixing plate is rotatably connected to the support plate via a sleeve, and the fixing plate is fixed to the outer seat body via a fastener;

[0019] There are two fasteners, one of which runs through the middle of the sleeve, and the other is located in the middle of the fixing plate.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention has a compact and reasonable structure and is easy to operate. By pressing a button, the locking mechanism unlocks the rotation of the rotation-linear conversion mechanism, and simultaneously applies force to the support plate to rotate it relative to the fixed plate. The support plate pulls or pushes the rotation-linear conversion mechanism through the support seat, so that the rotation-linear conversion mechanism moves relative to the length direction of the slide rail, thereby realizing the angle adjustment of the support plate, that is, the seat armrest, and the rotation-linear conversion mechanism realizes stepless adjustment of the angle. The operation is simple, convenient and reliable, the stability is good, the comfort of use is greatly improved, and the user experience is good.

[0022] The present invention also includes the following advantages:

[0023] The rotation-linear conversion mechanism can be a screw-nut combination, or a pinion-rack combination. The rotation of the screw or the pinion can be locked or unlocked by the locking mechanism, so that the rotation-linear conversion mechanism can switch between transmission cooperation and non-transmission cooperation, and then cooperate with the force applied to the support plate to adjust the distance between the support seat and the slide rail, and adjust the angle of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention (Example 1).

[0025] Figure 2 for Figure 1 Exploded view (another perspective).

[0026] Figure 3 It is a schematic diagram of the installation between the locking mechanism, the button assembly and the screw rod of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the present invention (Example 2).

[0028] Figure 5 for Figure 4 A partial enlarged view of part A in the middle.

[0029] Among them: 1. support plate; 2. locking mechanism; 3. button assembly; 4. support seat; 5. axial limit mechanism; 6. screw rod; 7. slide rail; 8. fixed plate; 11. through hole; 21. cable; 22. lever two; 23. spline sleeve; 24. torsion spring; 25. lever one; 26. tooth plate; 31. button seat; 32. spring; 33. button; 51. bushing; 52. screw rod seat; 53. retaining spring; 61. spline part; 62. nut; 63. slot; 81. fastener; 82. sleeve; 91. support plate; 92. rack; 93. pinion. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0031] like Figure 1 As shown, the stepless adjustment mechanism of the seat armrest angle of this embodiment includes a fixed plate 8, a support plate 1 is rotatably installed on the upper end of the fixed plate 8, and a slide rail 7 is rotatably installed on the lower end of the fixed plate 8; the rear end of the support plate 1 is rotatably connected to the fixed plate 8, a support seat 4 is fixedly installed below the front end of the support plate 1, and a rotation-linear conversion mechanism is installed between the support seat 4 and the slide rail 7, and the distance between the support seat 4 and the slide rail 7 is adjusted by the rotation-linear conversion mechanism; it also includes a locking mechanism 2, and the locking mechanism 2 locks the rotation of the rotation-linear conversion mechanism; by pressing the button 33, the locking mechanism 2 unlocks the rotation of the rotation-linear conversion mechanism, and simultaneously applies force to the support plate 1 to rotate it relative to the fixed plate 8, and the support plate 1 pulls or pushes the rotation-linear conversion mechanism through the support seat 4, so that the rotation-linear conversion mechanism moves relative to the length direction of the slide rail 7, so as to achieve the angle adjustment of the support plate 1, that is, the seat armrest, and the stepless adjustment of the angle is achieved by the rotation-linear conversion mechanism.

[0032] like Figure 2 and Figure 3 As shown, the structure of the locking mechanism 2 is: it includes a lever 25 rotatably installed at the front end above the support seat 4, a button assembly 3 is installed from bottom to top through the support seat 4, and the top of the button assembly 3 is in contact with the front end of the bottom of the lever 25; a lever 22 is installed behind the lever 25, and a cable 21 is installed between the rear end of the lever 25 and the lever 22, and a stopper is installed on the lever 22, which locks the rotation of the rotation-linear conversion mechanism.

[0033] The cable 21 is located above the support plate 1, and both ends of the cable 21 penetrate the support plate 1 downward; both ends of the cable 21 are provided with spherical structures, and both ends of the cable 21 located inside the two spherical structures are movably provided with rope sleeves; the spherical structure at the front end of the cable 21 is clamped with the lever 1 25, the rope sleeve at the front end of the cable 21 is clamped with the front end of the support plate 1, and the spherical structure at the rear end of the cable 21 is clamped with the lever 2 22; a through hole 11 is opened on the support plate 1 for the rear end of the cable 21 to pass through, and the rope sleeve at the rear end of the cable 21 is clamped with the buckle at the edge of the through hole 11.

[0034] The structure of the button assembly 3 is as follows: it includes a button seat 31 that passes through the support seat 4 from bottom to top, and the top of the button seat 31 is fixed to the support seat 4 by a barb structure; a button 33 is installed through the button seat 31 from bottom to top, and the top of the button 33 is limitedly fixed to the button seat 31 by a barb structure, and the top end of the button 33 contacts the bottom surface of the lever 25; a spring 32 is also installed between the button 33 and the button seat 31.

[0035] The upper end of the fixing plate 8 is rotatably connected to the supporting plate 1 via a sleeve 82, and the fixing plate 8 is fixed to the outer seat body via a fastener 81;

[0036] There are two fasteners 81 , one fastener 81 passes through the middle of the sleeve 82 , and the other fastener 81 is located in the middle of the fixing plate 8 .

[0037] The rotation-linear conversion mechanism can be a screw-nut combination, or a gear rack combination. The rotation of the screw 6 or the pinion 93 is locked or unlocked by the locking mechanism 2, so that the rotation-linear conversion mechanism can switch between transmission cooperation and non-transmission cooperation, and then cooperate with the force applied to the support plate 1 to adjust the distance between the support seat 4 and the slide rail 7, and adjust the angle of the support plate 1.

[0038] Embodiment 1: The rotation-linear conversion mechanism is a screw rod 6 and a nut 62 that cooperate with each other.

[0039] The second lever 22 is arranged longitudinally, the top of the second lever 22 is clamped with the cable 21, and the bottom of the second lever 22 is clamped with a rotation stopper, which is a spline sleeve 23;

[0040] A nut 62 is fixedly installed on the side of the slide rail 7, and a screw rod 6 is spirally installed through the nut 62. The length direction of the screw rod 6 is consistent with the length direction of the slide rail 7. A spline portion 61 matching the spline sleeve 23 is provided at the front end of the screw rod 6. The nut 62 and the screw rod 6 constitute a rotation-linear conversion mechanism, and an axial limiting mechanism 5 is also installed between the support seat 4 and the front end of the screw rod 6.

[0041] The middle part of lever 22 is rotatably connected to the support seat 4 through a pin shaft, and a torsion spring 24 is mounted on the outer circumferential surface of the pin shaft. One end of the torsion spring 24 is clamped on lever 22, and the other end of the torsion spring 24 is clamped on lever 1 25. The torsion spring 24 is used to maintain the relative position relationship between lever 1 25 and lever 2 22. When the spline portion 61 of the screw rod 6 is assembled with the spline sleeve 23, the torsion spring 24 limits the position change of lever 22, thereby limiting the rotation of the screw rod 6; the lever 1 25 is horizontally arranged, and the middle part of the lever 1 25 is rotatably connected to the support seat 4 through another pin shaft.

[0042] The structure of the axial limiting mechanism 5 is as follows: it includes a screw seat 52 fixed to the rear end of the support seat 4, the front end of the screw 6 passes through the screw seat 52, a sleeve 51 is installed between the screw seat 52 and the screw 6, and a groove 63 is opened along the circumferential direction on the screw 6 located in front of the sleeve 51, and a retaining spring 53 is clamped in the groove 63; the sleeve 51 is a flange structure, and the side wall of the screw seat 52 mounted on the screw 6 is located between the flange end of the sleeve 51 and the retaining spring 53, thereby ensuring the axial rotation freedom of the screw 6 relative to the screw seat 52 while limiting its axial movement relative to the screw seat 52.

[0043] The operating principle of the first embodiment is:

[0044] The button 33 is pressed upward, and the button 33 moves upward relative to the button seat 31, the spring 32 is compressed, and the top of the button 33 pushes the front end of the lever 1 25 upward, so that the lever 1 25 rotates relative to the support seat 4, and the rear end of the lever 1 25 swings downward, thereby pulling the cable 21, and the cable 21 pulls the top of the lever 22 to swing backward, so that the lever 22 rotates relative to the support seat 4, and the lower end of the lever 22 swings forward, thereby driving the spline sleeve 23 to move forward, so that the spline sleeve 23 leaves the spline portion 61 at the end of the screw rod 6, that is, the rotational freedom of the screw rod 6 is released;

[0045] Synchronously, force is applied to the support plate 1 to make it rotate relative to the fixed plate 8. For example, the front end of the support plate 1 swings upward relative to the fixed plate 8. The support plate 1 pulls the screw rod 6 through the support seat 4 and the axial limit mechanism 5, so that the screw rod 6 moves forward relative to the length direction of the slide rail 7 through the screw pair with the nut 62. That is, the screw rod 6 rotates relative to the slide rail 7 and also moves forward relative to the length direction of the slide rail 7, thereby achieving the adjustment of the angle of the support plate 1 relative to the fixed plate 8, that is, the adjustment of the angle of the seat armrest relative to the seat;

[0046] When the angle of the seat armrest is adjusted to a comfortable position, release the force applied to the support plate 1 and then release the force of pressing the button 33. The button 33 moves downward and resets under the action of the spring 32. The upward thrust applied to the bottom surface of the front end of the lever 25 is released. Under the restoring force of the torsion spring 24, the lever 25 rotates and resets relative to the support seat 4. The tension applied to the front end of the cable 21 is released, and the lever 22 rotates and resets relative to the support seat 4, so that the spline sleeve 23 mounted on the bottom end of the lever 22 moves backward and is again mounted on the spline portion 61 at the end of the screw rod 6, thereby limiting the rotational freedom of the screw rod 6, that is, the screw rod 6 is stationary relative to the slide rail 7 through the nut 62.

[0047] Embodiment 2: The rotation-linear conversion mechanism is a rack 92 and a pinion 93 that cooperate with each other.

[0048] like Figure 4 and Figure 5 As shown, the lever 22 is arranged horizontally, the rear end of the lever 22 is clamped with the cable 21, and a rotation stopper is installed on the bottom surface of the rear end of the lever 22, and the rotation stopper is a toothed plate 26;

[0049] A pinion 93 is rotatably mounted at the end of the slide rail 7, and a rack 92 is arranged along the length direction in the slide rail 7 below the pinion 93. The top of the pinion 93 meshes with the toothed plate 26, and the bottom of the pinion 93 meshes with the rack 92. The pinion 93 and the rack 92 constitute a rotation-linear conversion mechanism.

[0050] A support plate 91 is rotatably mounted on the rear end of the support seat 4 , a front end of a rack 92 is fixedly mounted on the support plate 91 , and a rear end of the rack 92 is supported by the slide rail 7 .

[0051] The front end of the lever 22 is rotatably connected to the support plate 91 , and the middle part of the lever 1 25 is rotatably connected to the support seat 4 .

[0052] The operating principle of the second embodiment is:

[0053] The user's force application method is the same as that in the first embodiment, that is, the user presses the button 33 upwards and applies force to the support plate 1 to make it rotate relative to the fixed plate 8;

[0054] When the button 33 is pressed upward, the cable 21 is pulled by the lever 1 25, and the cable 21 pulls the rear end of the lever 22 to swing upward, so that the lever 22 rotates relative to the support plate 91, and the toothed plate 26 on the bottom surface of the rear end of the lever 22 swings upward and disengages from the pinion 93, thereby releasing the rotational freedom of the pinion 93;

[0055] When force is applied to the support plate 1 to rotate it relative to the fixed plate 8, taking the case where the front end of the support plate 1 swings upward relative to the fixed plate 8 as an example, the support plate 1 pulls the rack 92 through the support seat 4 and the support plate 91, so that the rack 92 moves forward relative to the length direction of the slide rail 7 through meshing with the pinion 93, and the pinion 93 rotates, thereby achieving the adjustment of the angle of the support plate 1 relative to the fixed plate 8, that is, the adjustment of the angle of the seat armrest relative to the seat;

[0056] When the seat armrest angle is adjusted to a comfortable position, release the force applied to the support plate 1 and the button 33, the button 33 is reset, the lever 1 25 is reset, and the lever 22 is reset, so that the toothed plate 26 on the bottom surface of the lever 22 is meshed with the pinion 93 again, limiting the rotational freedom of the pinion 93, so that the rack 92 is stationary relative to the slide rail 7 via the pinion 93.

[0057] The invention is simple to operate, convenient and quick to use, realizes stepless adjustment of the angle of the seat armrest, has good reliability, and effectively improves the user's comfort.

[0058] 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 adjustment mechanism for the angle of a seat armrest, characterized in that: The invention comprises a fixed plate (8), the upper end of which is rotatably mounted with a support plate (1), and the lower end of which is rotatably mounted with a slide rail (7); the rear end of the support plate (1) is rotatably connected to the fixed plate (8), a support seat (4) is fixedly mounted below the front end of the support plate (1), a rotation-linear conversion mechanism is installed between the support seat (4) and the slide rail (7), and the distance between the support seat (4) and the slide rail (7) is adjusted by the rotation-linear conversion mechanism; the invention also comprises a locking mechanism (2), and the locking mechanism (2) locks the rotation of the rotation-linear conversion mechanism; the structure of the locking mechanism (2) is as follows: the locking mechanism (2) comprises a locking mechanism rotatably mounted on the fixed plate (8); A lever (25) at the front end above the support seat (4) is provided with a button assembly (3) which penetrates the support seat (4) from bottom to top, and the top end of the button assembly (3) is fitted with the front end of the bottom end of the lever (25); a lever (22) is provided at the rear of the lever (25), a cable (21) is provided between the rear end of the lever (25) and the lever (22), a stopper is provided on the lever (22), and the stopper locks the rotation of the rotation-linear conversion mechanism; the lever (22) is arranged longitudinally, the top end of the lever (22) is clamped with the cable (21), the bottom end of the lever (22) is clamped with the stopper, and the stopper The invention relates to a spline sleeve (23); a nut (62) is fixedly mounted on the side of the slide rail (7); a screw rod (6) is spirally mounted through the nut (62); the length direction of the screw rod (6) is consistent with the length direction of the slide rail (7); a spline portion (61) matching the spline sleeve (23) is arranged at the front end of the screw rod (6); the nut (62) and the screw rod (6) constitute a rotation-linear conversion mechanism; an axial limiting mechanism (5) is also installed between the support seat (4) and the front end of the screw rod (6); the middle part of the lever (22) is rotatably connected to the support seat (4) through a pin shaft; a torsion spring (24) is sleeved on the outer circumferential surface of the pin shaft; the torsion spring (24) is 4) one end is clamped on the lever two (22), and the other end of the torsion spring (24) is clamped on the lever one (25); the lever one (25) is arranged horizontally, and the middle part of the lever one (25) is rotatably connected to the support seat (4) through another pin shaft; the structure of the axial limiting mechanism (5) is as follows: it includes a screw seat (52) fixed to the rear end of the support seat (4), the front end of the screw rod (6) passes through the screw seat (52), a shaft sleeve (51) is installed between the screw seat (52) and the screw rod (6), and a groove (63) is opened along the circumferential direction on the screw rod (6) located in front of the shaft sleeve (51), and a retaining ring (53) is clamped in the groove (63).

2. The stepless adjustment mechanism for the seat armrest angle according to claim 1, characterized in that: The second lever (22) is arranged horizontally, the rear end of the second lever (22) is clamped with the cable (21), and a rotation-stopping member is installed on the bottom surface of the rear end of the second lever (22), and the rotation-stopping member is a toothed plate (26); A pinion (93) is rotatably mounted at the end of the slide rail (7), a rack (92) is arranged along the length direction in the slide rail (7) below the pinion (93), the top of the pinion (93) is meshed with the toothed plate (26), and the bottom of the pinion (93) is meshed with the rack (92), and the pinion (93) and the rack (92) constitute a rotation-linear conversion mechanism; A support plate (91) is rotatably mounted on the rear end of the support seat (4), the front end of the rack (92) is fixedly mounted on the support plate (91), and the rear end of the rack (92) is supported by a slide rail (7).

3. The stepless adjustment mechanism for the seat armrest angle as claimed in claim 2, characterized in that: The front end of the lever 2 (22) is rotatably connected to the support plate (91), and the middle part of the lever 1 (25) is rotatably connected to the support seat (4).

4. The stepless adjustment mechanism for the seat armrest angle according to claim 1, characterized in that: The cable (21) is located above the support plate (1), and both ends of the cable (21) penetrate the support plate (1) downward; both ends of the cable (21) are provided with spherical structures, and both ends of the cable (21) located inside the two spherical structures are provided with cable sleeves; the spherical structure at the front end of the cable (21) is clamped with the first lever (25), the cable sleeve at the front end of the cable (21) is clamped with the front end of the support plate (1), and the spherical structure at the rear end of the cable (21) is clamped with the second lever (22); the support plate (1) is provided with a through hole (11) for the rear end of the cable (21) to penetrate, and the cable sleeve at the rear end of the cable (21) is clamped with the buckle at the edge of the through hole (11).

5. The stepless adjustment mechanism for the seat armrest angle according to claim 1, characterized in that: The structure of the button assembly (3) is as follows: it comprises a button seat (31) penetrating the support seat (4) from bottom to top, the top of the button seat (31) being clamped and fixed to the support seat (4) via a barb structure; a button (33) is installed penetrating the button seat (31) from bottom to top, the top of the button (33) being limitedly clamped to the button seat (31) via the barb structure, the top end of the button (33) being in contact with the bottom surface of the lever (25); and a spring (32) is also installed between the button (33) and the button seat (31).

6. The stepless adjustment mechanism for the seat armrest angle according to claim 1, characterized in that: The upper end of the fixing plate (8) is rotatably connected to the support plate (1) via a sleeve (82), and the fixing plate (8) is fixed to the outer seat body via a fastener (81); The number of the fasteners (81) is two, one fastener (81) passes through the middle of the sleeve (82), and the other fastener (81) is located in the middle of the fixing plate (8).

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