Office chair back with self-adaptive adjustment function

Abstract

The office chair back with the self-adaptive adjustment function comprises a chair back body, a waist rest, a self-adaptive support and a forward turning torsional spring, and the waist rest is installed on the top edge portion of the self-adaptive support; a hinged shaft hole is formed in the lower part of the chair back main body; a follow-up rotating shaft hinged to the hinged shaft hole is arranged on the self-adaptive bracket; a follow-up connecting rod synchronously rotating along with the self-adaptive bracket is mounted on the self-adaptive bracket, and a positioning seat is arranged on the self-adaptive bracket; a first torsion arm of the forward turning torsion spring is connected with the positioning seat in a matched mode, and a second torsion arm of the forward turning torsion spring is matched with the follow-up connecting rod. When the waist rest is used, the waist rest support can be automatically turned backwards through pressure applied to the waist rest by a user, and the forward turning torsional spring enables the waist rest to always support the waist of the user through elastic force in the process, so that the tipping angle of the waist rest is automatically adjusted, the waist rest is automatically attached to the waist of the human body, and the waist supporting requirement of the user is effectively met; and the use requirements of different human bodies can be met, and the use comfort can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to office chair technical field, concretely relates to office chair chair back with self -adaptation adjustment. BACKGROUND

[0002] Office chair is the seat that people often use in daily work, and the quality of office chair affects the office comfort of people. In order to improve the use comfort of office chair, the lumbar support for supporting the waist of user is usually arranged on the chair back of office chair. Referring to the technical scheme disclosed in patent number ZL202420475049.1, a chair structure is arranged with an adjusting bin in the seat, and the parts required to drive the lumbar support are hidden in the adjusting bin to protect the parts, and the space in the seat can be more fully utilized, and the appearance of the chair can be improved. The upper end of the supporting rod is installed with the lumbar support, and the lower end is inserted into the adjusting bin and connected with the adjusting mechanism. The supporting rod is driven by the adjusting mechanism to move forward and backward, and then the lumbar support is driven to realize forward and backward adjustment. However, the position of the lumbar support in the technical scheme is fixed after being adjusted by the adjusting mechanism, and the inclination angle cannot be automatically adjusted, and the lumbar support cannot automatically fit the human waist, which affects the use comfort. SUMMARY

[0003] In order to overcome the defects of the prior art, the utility model provides office chair chair back with self -adaptation adjustment.

[0004] The utility model solves the technical scheme that it adopts:

[0005] Office chair chair back with self -adaptation adjustment, including chair back main part and lumbar support, its characterized in that: still include self -adaptation support and front flip torsional spring, the top edge of self -adaptation support is installed on the department, the lower part of chair back main part is equipped with the hinge shaft hole, the follow -up pivot is equipped on self -adaptation support and is hinged in hinge shaft hole, self -adaptation support is configured as the rotation center to the rear swing of follow -up pivot when user leans on the lumbar support, the follow -up connecting rod that rotates synchronously with it is installed on self -adaptation support, the positioning seat that corresponds follow -up connecting rod is equipped on self -adaptation support, the first torsional arm of front flip torsional spring is connected with positioning seat, the second torsional arm of front flip torsional spring is connected with follow -up connecting rod, front flip torsional spring is configured as the self -adaptation support is driven to swing forward by the elastic force.

[0006] In the utility model, the lumbar support includes a side rest, the side rest includes a waist side support, a front rest and a rear rest connected in sequence from front to back, and the rear end of the rear rest is fixed on the top edge. The rear rest includes at least a deformation adaptive part capable of deforming.

[0007] In the utility model, the front end of the back seat is provided with a buckling groove for buckling and fixing the front seat, and the rear end of the front seat is provided with a plug-in part matched with the buckling groove.

[0008] In the utility model, the positioning seat is internally provided with a linkage installation groove, the left and right sides of the positioning seat are both provided with a seat through hole, one end of the follow-up connecting rod passes through the linkage installation groove and the seat through hole, a rotary limiting seat rotatable installed in the linkage installation groove is sleeved on the follow-up connecting rod, the follow-up connecting rod and the rotary limiting seat are synchronously rotatable, and the positioning seat is provided with a rotary limiting structure for cooperating with the rotary limiting seat to limit the rotary angle of the waist rest.

[0009] In the utility model, the linkage installation groove is provided with a back turning limiting convex part for limiting the maximum back rotary angle of the adaptive support and a front turning limiting convex part for limiting the maximum front rotary angle of the adaptive support, and the rotary limiting seat is provided with a rotary limiting part movably arranged between the back turning limiting convex part and the front turning limiting convex part.

[0010] In the utility model, the two ends of the rotary limiting seat are both provided with linkage extension sleeves wrapped outside the follow-up connecting rod, and the linkage extension sleeves at the two ends of the rotary limiting seat respectively extend out of the two seat through holes; the front turning torsional spring has two and is movably sleeved on the two linkage extension sleeves respectively.

[0011] In the utility model, the follow-up connecting rod is provided with follow-up insertion holes, each follow-up insertion hole corresponds to a front turning torsional spring, and the second torsional arm of the front turning torsional spring is inserted into the follow-up insertion hole.

[0012] In the utility model, the left and right ends of the positioning seat are both provided with torsional spring cooperation parts, the first torsional arm of the front turning torsional spring is matched on the torsional spring cooperation part.

[0013] In the utility model, the two hinge shaft holes are distributed left and right, the lower part of the chair back body is further provided with a hidden installation groove located between the two hinge shaft holes and communicated with the hinge shaft holes, the hidden installation groove has a hidden installation opening, the positioning seat and the front turning torsional spring are both arranged in the hidden installation groove, the middle part of the follow-up connecting rod is located in the hidden installation groove and the two ends thereof pass through the two hinge shaft holes and are connected with the adaptive support, and the hidden installation opening is closed by a shielding decorative cover.

[0014] In the utility model, the two side edge parts of the adaptive support are both provided with follow-up adaptation holes for inserting and fixing the end part of the follow-up connecting rod and enabling the follow-up connecting rod to synchronously rotate with the adaptive support; one follow-up rotating shaft is installed on each side edge part, and the follow-up rotating shaft is sleeved on the follow-up connecting rod and synchronously rotates with the follow-up connecting rod.

[0015] The utility model discloses the beneficial effect: the utility model discloses through the mutual cooperation of self -adaptation support, front flip torsional spring and locating seat realizes the self -adaptation function of waist rest, and the waist rest support can be automatically turned over to back through the pressure that the user exerts to the waist rest when the waist rest uses, and the front flip torsional spring is in this process and uses the elasticity to make the waist rest always support the waist of user, thereby automatically realizes the adjustment of waist rest tilt angle, and automatically fits human waist, effectively satisfies the waist support requirement of user, not only can be suitable for the use need of different human body, can also improve the use comfort. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model is further illustrated below in connection with the drawings and the embodiment:

[0017] Figure 1 It is the perspective view of office chair backrest;

[0018] Figure 2 It is the schematic drawing of self -adaptation support, front flip torsional spring and locating seat in hidden installation groove;

[0019] Figure 3 It is the combination schematic drawing of self -adaptation support, front flip torsional spring, locating seat and follow -up connecting rod;

[0020] Figure 4 It is the installation schematic drawing of rotary limit seat;

[0021] Figure 5 It is the exploded schematic drawing of self -adaptation support, locating seat and follow -up connecting rod;

[0022] Figure 6 It is the explosion drawing of two side rests. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be described clearly and completely below in connection with the drawings in the utility model embodiment.

[0024] REFER Figures 1-6The application discloses an office chair backrest with adaptive adjustment, comprising a backrest body 1, a waist rest 2, an adaptive support 3 and a front flip torsion spring 4, wherein the backrest body 1, the waist rest 2 and the adaptive support 3 are made of flexible material; the adaptive support 3 is in a shape of “∩”, the adaptive support 3 comprises two left and right symmetrical side edge parts 31 and two top edge parts 32 integrally connected with the top ends of the two side edge parts 31 respectively, and the waist rest 2 is installed on the top edge parts 32; a lower part of the backrest body 1 is provided with a hinge shaft hole 12, the adaptive support 3 is provided with a follow-up rotating shaft 5 hinged in the hinge shaft hole 12, the follow-up rotating shaft 5 is located at the lower end of the side edge part 31, and the adaptive support 3 is configured to rotate and swing backward with the follow-up rotating shaft 5 as the rotating center when a user leans on the waist rest 2; the adaptive support 3 is installed with a follow-up connecting rod 6 rotating synchronously, the adaptive support is provided with a positioning seat 7 corresponding to the follow-up connecting rod 6; a first torsion arm 41 of the front flip torsion spring 4 is connected with the positioning seat 7 in a matched mode, a second torsion arm 42 of the front flip torsion spring 4 is matched with the follow-up connecting rod 6, and the front flip torsion spring 4 is configured to drive the adaptive support 3 to rotate and swing forward by elastic force, so that the waist rest 2 always supports the waist of the user.

[0025] As a preferred embodiment, the waist rest 2 is composed of two left and right symmetrical side rests 20, the side rest 20 comprises a waist side support 21, a front rest 22 and a rear rest 23 connected in sequence from front to back, the front end of the front rest 22 is fixedly arranged on the back of the waist side support 21 in a bolt connection mode, the rear end of the rear rest 23 is fixedly arranged on the top edge part 32 of the adaptive support 3 in a bolt connection mode, and the front end of the rear rest 23 is connected with the rear end of the front rest 22 in a matched mode.

[0026] In the embodiment, the rear rest 23 is made of flexible material, and the rear rest 23 at least comprises a deformation adaptive part 231 capable of deforming, so that the deformation adaptive part 231 can deform to fit the waist of the user when the user leans on the waist side support 21, and the comfort and adaptability of the waist rest 2 supporting the user are improved. Specifically, the deformation adaptive part 231 is located in the middle part of the rear rest 23, a plurality of deformation ring grooves 232 arranged on the outside of the deformation adaptive part 231 from front to back and an inner deformation groove 233 located in the deformation adaptive part 231 are arranged on the deformation adaptive part 231, the front end of the inner deformation groove 233 extends forward through the front end of the rear rest 23, and the deformation ring grooves 232 and the inner deformation groove 233 are beneficial to the deformation of the deformation adaptive part 231.

[0027] In the embodiment, the front end of the rear seat 23 is provided with a buckling groove 234 for buckling and fixing the front seat 22, the cross-sectional shape of the buckling groove 234 is in the shape of “∩”, the upper part of the buckling groove 234 is a buckling opening, and the rear end of the front seat 22 is provided with a buckling part 221 matched with the buckling groove 234. During installation, the front seat 22 moves from top to bottom, so that the buckling part 221 enters the buckling groove 234 from the buckling opening until the buckling part 221 abuts against the top of the buckling groove 234, thereby limiting the continuous downward movement of the front seat 22, and the left and right sides of the buckling part 221 are in contact with the left and right groove walls of the buckling groove 234, respectively, thereby limiting the rotational swing of the front seat 22, so as to achieve the purpose of installing the lumbar support 2 on the adaptive support 3.

[0028] In the embodiment, the chair back body 1 is further provided with a hidden installation groove 11 between and communicating with the two hinge shaft holes 12, the hidden installation groove 11 has a hidden installation opening, the positioning seat 7 and the front tilting torsion spring 4 are arranged in the hidden installation groove 11, the middle part of the follow-up connecting rod 6 is arranged in the hidden installation groove 11 and the two ends thereof pass through the two hinge shaft holes 12 and are connected with the adaptive support 3, the hidden installation opening is closed by a shielding decorative cover 100, and the shielding decorative cover 100 is fixedly installed on the chair back body 1 in a bolt connection mode. The above structure realizes the shielding and hiding of the positioning seat 7 and the front tilting torsion spring 4, improves the appearance of the office chair back, and reduces the probability of damage of the positioning seat 7 and the front tilting torsion spring 4 caused by external sundries.

[0029] In the embodiment, the positioning seat 7 is provided with a linkage installation groove 71, the left and right sides of the positioning seat 7 are provided with seat through holes communicating with the linkage installation groove 71, one end of the follow-up connecting rod 6 passes through the linkage installation groove 71 and the seat through hole, the follow-up connecting rod 6 is sleeved with a rotary limiting seat 8 rotatably installed in the linkage installation groove 71, the follow-up connecting rod 6 and the rotary limiting seat 8 are synchronously rotatable, and the positioning seat 7 is provided with a rotary limiting structure for cooperating with the rotary limiting seat 8 to limit the rotation angle of the lumbar support 2.

[0030] In the embodiment, the rotation limiting structure comprises a back-tilting limiting protrusion 72 for limiting the maximum backward rotation angle of the adaptive support 3 and a forward-tilting limiting protrusion 73 for limiting the maximum forward rotation angle of the adaptive support 3, and the rotation limiting seat 8 is provided with a rotation limiting part 81 movably arranged between the back-tilting limiting protrusion 72 and the forward-tilting limiting protrusion 73. When the rotation limiting part 81 is pressed against the forward-tilting limiting protrusion 73 during the forward rotation swing of the adaptive support 3 driven by the forward-tilting torsion spring 4, the adaptive support 3 cannot continue to rotate and swing forward, thereby limiting the maximum forward rotation swing angle of the adaptive support 3. When the rotation limiting part 81 is pressed against the back-tilting limiting protrusion 72 during the backward rotation swing of the adaptive support 3, the adaptive support 3 cannot continue to rotate and swing backward, thereby limiting the maximum backward rotation swing angle of the adaptive support 3.

[0031] In the embodiment, the two ends of the rotation limiting seat 8 are provided with linkage extension sleeves 82 wrapped outside the follow-up connecting rod 6, and the linkage extension sleeves 82 at the two ends of the rotation limiting seat 8 respectively extend from the two seat penetrating holes.

[0032] In the embodiment, the positioning seat 7 comprises a main mounting seat 701 and a mounting seat cover 702, and one end of the main mounting seat 701 and the mounting seat cover 702 is mounted on the back support of the chair by means of the mounting shaft 10. Further, the main mounting seat 701 and the mounting seat cover 702 are provided with mounting shaft holes through which the mounting shaft 10 passes, and the hidden mounting groove 11 is provided with two shaft end mounting positions, which comprise shaft mounting grooves 111 and shaft mounting screw holes 112. The two ends of the mounting shaft 10 are respectively clamped into the shaft mounting grooves 111 of the two shaft end mounting positions, and the end portions of the mounting shaft 10 are limited in the shaft mounting grooves 111 by mounting limiters and cannot be taken out. The shaft mounting screw holes 112 are threadedly connected with mounting limit bolts for fixing the mounting limiters, and the mounting limit bolts of the mounting limiters are not shown in the drawings. Further, one side of the main mounting seat 701 is provided with the linkage mounting groove 71, and the mounting seat cover 702 is mounted on one side of the main mounting seat 701 by means of bolt connection and seals one side of the linkage mounting groove 71. The other side of the main mounting seat 701 and the mounting seat cover 702 are provided with the seat penetrating holes.

[0033] In the embodiment, the forward-tilting torsion spring 4 has two and is movably sleeved on the two linkage extension sleeves 82. This mounting mode can reduce the radial action amplitude of the forward-tilting torsion spring 4 and avoid the collision of the inner ring of the forward-tilting torsion spring 4 with the follow-up connecting rod 6. Further, the follow-up connecting rod 6 is provided with follow-up insertion holes, each of which corresponds to a forward-tilting torsion spring 4. The linkage extension sleeve 82 is provided with a follow-up avoiding hole corresponding to the follow-up insertion hole, and the second torsion arm 42 of the forward-tilting torsion spring 4 is inserted into the follow-up insertion hole through the follow-up avoiding hole, thereby realizing the cooperative connection of the forward-tilting torsion spring 4 and the follow-up connecting rod 6.

[0034] In the embodiment, the left and right ends of the positioning seat 7 are provided with torsion spring matching parts 703, and each torsion spring matching part 703 corresponds to a front turning torsion spring 4, and the first torsion arm 41 of the front turning torsion spring 4 is matched on the torsion spring matching part 703, so as to realize the combined connection between the front turning torsion spring 4 and the positioning seat 7. Specifically, the main mounting seat 701 and the mounting seat cover 702 are both provided with the torsion spring matching part 703, so as to correspond to two front turning torsion springs 4 respectively.

[0035] In the embodiment, the two side edge parts 31 of the adaptive support 3 are both provided with a follow-up adaptive hole 311 for inserting and fixing the end of the follow-up connecting rod 6 and synchronously rotating the follow-up connecting rod 6. Specifically, the part of the follow-up connecting rod 6 inserted into the follow-up adaptive hole 311 is provided with a follow-up lock hole 61, the side edge part 31 is provided with a follow-up mounting hole 312 corresponding to the follow-up lock hole 61, and the follow-up mounting hole 312 is threaded with a follow-up mounting bolt which is combined and fixed with the side edge part 31 in the follow-up lock hole 61, and the follow-up mounting bolt is not shown in the drawings.

[0036] In the embodiment, the follow-up adaptive hole 311 is matched with the follow-up connecting rod 6, and the outer contour section of the follow-up connecting rod 6 and the section shape of the follow-up adaptive hole 311 are both quadrilaterals, so that the follow-up connecting rod 6 and the adaptive support 3 can better synchronize the action.

[0037] In the embodiment, each side edge part 31 is provided with a follow-up rotating shaft 5, the follow-up rotating shaft 5 is sleeved on the follow-up connecting rod 6 and synchronously rotates with the follow-up connecting rod 6, the side edge part 31 is provided with a follow-up synchronous groove 313, one end of the hinge shaft hole 12 away from the hidden mounting groove 11 is provided with a hinge groove hole with a larger diameter than the hinge shaft hole 12, and one end of the follow-up rotating shaft 5 towards the side edge part 31 is provided with a rotating shaft disc 51 and a rotating shaft synchronous protruding part 52 arranged in sequence, wherein one end of the rotating shaft disc 51 is rotatably matched in the hinge groove hole, and the other end is pressed against the inner side of the side edge part 31, and the rotating shaft disc 51 is used for limiting the left and right movement of the follow-up rotating shaft 5; the rotating shaft synchronous protruding part 52 is matched and mounted in the follow-up synchronous groove 313, so that the follow-up rotating shaft 5 is synchronously linked with the side edge part 31.

[0038] The above only describes the preferred embodiments of the present application, and any technical solutions achieving the same purpose by basically the same means shall fall within the protection scope of the present application.

Claims

1. An office chair backrest with adaptive adjustment, comprising a backrest body (1) and a lumbar support (2), characterized in that: It also includes an adaptive bracket (3) and a forward-folding torsion spring (4). The lumbar support (2) is mounted on the top edge (32) of the adaptive bracket (3). The lower part of the backrest body (1) is provided with a hinge shaft hole (12). The adaptive bracket (3) is provided with a follower shaft (5) hinged to the hinge shaft hole (12). The adaptive bracket (3) is configured to rotate and swing backward with the follower shaft (5) as the rotation center when the user leans on the lumbar support (2). The adaptive bracket (3) is provided with a follower link (6) that rotates synchronously with it. The adaptive bracket is provided with a positioning seat (7) corresponding to the follower link (6). The first torsion arm (41) of the forward-folding torsion spring (4) is connected to the positioning seat (7). The second torsion arm (42) of the forward-folding torsion spring (4) is connected to the follower link (6). The forward-folding torsion spring (4) is configured to drive the adaptive bracket (3) to rotate and swing forward by elastic force.

2. The office chair backrest with adaptive adjustment according to claim 1, characterized in that: The lumbar support (2) includes a side support (20), which includes a lumbar side support (21), a front seat (22) and a rear seat (23) connected from front to back. The rear end of the rear seat (23) is fixed to the top edge (32). The rear seat (23) includes at least a deformable adaptation part (231) that can deform.

3. The office chair backrest with adaptive adjustment according to claim 2, characterized in that: The front end of the front seat (22) is fixedly mounted on the back of the waist support (21). The front end of the rear seat (23) is provided with a fastening groove (234) for fastening and fixing the front seat (22). The rear end of the front seat (22) is provided with a buckle part (221) that is adapted to the fastening groove (234).

4. The office chair backrest with adaptive adjustment according to claim 2, characterized in that: The positioning seat (7) is provided with a linkage mounting groove (71). The left and right sides of the positioning seat (7) are provided with seat through holes. One end of the follower rod (6) passes through the linkage mounting groove (71) and the seat through hole. A rotation limit seat (8) that can be rotatably installed in the linkage mounting groove (71) is fitted on the follower rod (6). The follower rod (6) and the rotation limit seat (8) are rotated synchronously. The positioning seat (7) is provided with a rotation limiting structure for cooperating with the rotation limit seat (8) to limit the rotation angle of the lumbar support (2).

5. The office chair backrest with adaptive adjustment according to claim 4, characterized in that: The linkage mounting groove (71) is provided with a rear-flipping limiting protrusion (72) for limiting the maximum rearward rotation angle of the adaptive bracket (3) and a front-flipping limiting protrusion (73) for limiting the maximum forward rotation angle of the adaptive bracket (3). The rotation limiting seat (8) is provided with a rotation limiting part (81) that moves between the rear-flipping limiting protrusion (72) and the front-flipping limiting protrusion (73).

6. The office chair backrest with adaptive adjustment according to claim 4, characterized in that: Both ends of the rotary limiting seat (8) are provided with linkage extension sleeves (82) wrapped around the follower connecting rod (6). The linkage extension sleeves (82) at both ends of the rotary limiting seat (8) extend out from the two seat through holes respectively. There are two forward flipping torsion springs (4), which are respectively movably fitted on the two linkage extension sleeves (82).

7. The office chair backrest with adaptive adjustment according to any one of claims 1-6, characterized in that: The follower link (6) is provided with a follower insertion hole, and each follower insertion hole corresponds to a forward flipping torsion spring (4). The second torsion arm (42) of the forward flipping torsion spring (4) is inserted into the follower insertion hole.

8. The office chair backrest with adaptive adjustment according to any one of claims 1-6, characterized in that: Both ends of the positioning seat (7) are provided with torsion spring mating parts (703), and the first torsion arm (41) of the forward flipping torsion spring (4) is mated on the torsion spring mating parts (703).

9. The office chair backrest with adaptive adjustment according to claim 1, characterized in that: There are two hinge shaft holes (12) and they are distributed on the left and right. The lower part of the chair back body (1) is also provided with a hidden mounting groove (11) located between the two hinge shaft holes (12) and communicating with the hinge shaft holes (12). The hidden mounting groove (11) has a hidden mounting opening. The positioning seat (7) and the forward flip torsion spring (4) are both located in the hidden mounting groove (11). The middle part of the follower linkage (6) is located in the hidden mounting groove (11) and its two ends pass through the two hinge shaft holes (12) respectively and are connected to the adaptive bracket (3). The hidden mounting opening is closed with a cover (100).

10. The office chair backrest with adaptive adjustment according to claim 9, characterized in that: The adaptive bracket (3) has two side parts (31) for inserting and fixing the end of the follower link (6) and rotating the follower link (6) synchronously with it; each side part (31) is equipped with a follower rotating shaft (5), which is fitted on the follower link (6) and rotates synchronously with the follower link (6).

Images