CN216961934U

CN216961934U - Lumbar support adjusting mechanism of office chair

Info

Publication number: CN216961934U
Application number: CN202123399410.2U
Authority: CN
Inventors: 吴贤琴
Original assignee: Anji Tongtong Furniture Co ltd
Current assignee: Anji Tongtong Furniture Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-15
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a lumbar support adjusting mechanism of an office chair, which relates to the technical field of office chairs and comprises a support piece arranged at the inner side of a chair backrest, wherein the support piece comprises a back plate, a movable plate and a back pad, the movable plate is arranged between the back plate and the back pad, the edge of the back pad and the back plate is fixedly assembled, one surface of the movable plate is in sliding connection with the back plate, the other surface of the movable plate is fixedly assembled with the inner side of the back pad, threaded rods are symmetrically arranged on one surface, close to the back plate, of the movable plate, one end, far away from the movable plate, of each threaded rod penetrates through the back plate and extends out of the back plate, a gear is rotatably arranged on the outer side surface of the back plate, one end, close to the back plate, of the gear is provided with a threaded groove in threaded connection with one end of each threaded rod, and the inner side of the chair backrest is symmetrically provided with a limiting groove; this lumbar support adjustment mechanism of office chair passes through the cooperation of threaded rod, gear and spacing groove, can realize the regulation to support piece's height and thickness to make the applicable crowd in different statures of this office chair.

Description

Lumbar support adjusting mechanism of office chair

Technical Field

The utility model relates to the technical field of office chairs, in particular to a lumbar support adjusting mechanism of an office chair.

Background

An office chair refers to various chairs which are convenient to work in daily work and social activities, a narrow office chair refers to a backrest chair on which a person sits when performing desktop work in a sitting posture state, and a generalized office chair refers to all chairs used in offices;

when people use the office chair to work, the people usually need to sit on the office chair for a long time, and the lumbar vertebra discomfort is easily caused in the past, so that some office chairs are provided with lumbar supports, but the common lumbar supports are fixed structures and cannot be adjusted, so that the lumbar supports are not suitable for people of different statures, and therefore the utility model provides the lumbar support adjusting mechanism of the office chair, so as to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides a lumbar support adjusting mechanism of an office chair, which can realize the adjustment of the height and the thickness of a supporting piece through the matching of a threaded rod, a gear and a limiting groove, so that the office chair can be suitable for people of different statures.

In order to solve the problems, the utility model provides a lumbar support adjusting mechanism of an office chair, which comprises a support piece arranged on the inner side of a chair backrest, wherein the support piece comprises a back plate, a moving plate and a back pad, the moving plate is arranged between the back plate and the back pad, the edge of the back pad is fixedly assembled with the edge of the back plate, one surface of the moving plate is in sliding connection with the back plate, the other surface of the moving plate is fixedly assembled with the inner side of the back pad, threaded rods are symmetrically arranged on one surface, close to the back plate, of the moving plate, one end, far away from the moving plate, of each threaded rod penetrates through the back plate and extends out, a gear is rotatably arranged on the outer side surface of the back plate, a threaded groove in threaded connection with one end of each threaded rod is arranged at one end, limiting grooves are symmetrically arranged on the inner side of the chair backrest, and side teeth meshed with the gear are symmetrically arranged on the inner wall of each limiting groove.

The further improvement is that: and a bearing is arranged on the outer wall of one end of the gear, which is provided with the thread groove, and one side of the bearing, which is far away from the gear, is fixedly assembled with the back plate.

The further improvement is that: the exposed section of the gear is matched with the depth of the limit groove.

The further improvement lies in that: the medial surface of spacing groove is equipped with first magnetic stripe, the one end that the gear is close to the spacing groove is equipped with the second magnetic stripe with first magnetic stripe adaptation.

The further improvement lies in that: the movable plate is characterized in that a sliding groove is formed in one surface, close to the movable plate, of the back plate, and a sliding block matched with the sliding groove is arranged on one surface, opposite to the back plate, of the movable plate.

The further improvement lies in that: the length of the threaded rod is equal to the length of the back plate and the whole threaded groove, and the moving plate is attached to the back plate.

The further improvement lies in that: the cross-section of back of the body pad is the arc structure, the back of the body pad is ventilative sponge material.

The utility model has the beneficial effects that: when the lumbar support adjusting mechanism of the office chair adjusts the support piece, the support piece can be directly pulled out from the limit groove horizontally, the gear is separated from the limit groove, the two gears are rotated simultaneously, the threaded rod which is connected with the thread groove in the gear in a threaded manner is driven to move back and forth through the rotation of the gear, so that the movable plate is pushed to move back and forth, the movable plate can drive the back cushion to move to a certain degree due to certain elasticity and flexibility of the back cushion, so that the thickness of the support piece can be adjusted, when the height of the support piece on the seat is adjusted, the support piece is only required to be moved to a proper height, the two gears are horizontally inserted into the limit groove, the side teeth on the two sides of the limit groove are meshed with the two sides of the gear, so that the gear can not rotate, the height and the thickness of the support piece are adjusted, and the office chair is suitable for people of different statures, the application scope of the device is increased to a certain extent, when installing support piece, because the gear just can submerge the spacing inslot completely, the extrusion force to the gear when effectively having reduced people and using support piece has improved the device's life to a certain extent, adsorbs each other through first magnetic stripe and second magnetic stripe for support piece assembles and does not drop easily on the backrest.

Drawings

Fig. 1 is a plan view of a seat back and a support member according to the present invention in a disassembled state.

Fig. 2 is a top view of the support member of the present invention.

Fig. 3 is an enlarged view of the structure at a in fig. 2 according to the present invention.

FIG. 4 is a perspective view of the seat back and support assembly of the present invention.

Fig. 5 is a perspective view of the assembly structure of the seat back and the limiting groove of the present invention.

FIG. 6 is a perspective view of a retaining groove of the present invention.

Wherein: 1. a seat back; 2. a support member; 3. a back plate; 4. moving the plate; 5. a back pad; 6. a threaded rod; 7. a gear; 8. a thread groove; 9. a limiting groove; 10. a side tooth; 11. a bearing; 12. a first magnetic stripe; 13. a second magnetic stripe; 14. a chute; 15. a slide block.

Detailed Description

In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

According to fig. 1, 2, 3, 4, 5, and 6, the present embodiment provides a lumbar support adjustment mechanism for an office chair, which includes a support 2 disposed inside a seat back 1, the support 2 includes a back plate 3, a movable plate 4, and a back pad 5, the movable plate 4 is disposed between the back plate 3 and the back pad 5, the back pad 5 is fixedly assembled with an edge of the back plate 3, one surface of the movable plate 4 is slidably connected to the back plate 3, the other surface of the movable plate 4 is fixedly assembled with the inside of the back pad 5, a threaded rod 6 is symmetrically disposed on one surface of the movable plate 4 close to the back plate 3, one end of the threaded rod 6 far away from the movable plate 4 penetrates through the back plate 3 and extends outside, a gear 7 is rotatably disposed on an outer side surface of the back plate 3, a threaded groove 8 in threaded connection with one end of the threaded rod 6 is disposed at one end of the gear 7 close to the back plate 3, a limiting groove 9 is symmetrically disposed on the inside of the seat back 1, the inner wall of the limit groove 9 is symmetrically provided with side teeth 10 meshed with the gear 7, when the support member 2 is adjusted, the support member can be directly pulled out from the limit groove 9 horizontally, the gear 7 is separated from the limit groove 9, simultaneously the two gears 7 are rotated, the threaded rod 6 which is connected with the threaded groove 8 in the gear 7 through the rotation of the gear 7 is driven to move back and forth, so that the moving plate 4 is pushed to move back and forth, the moving plate 4 can drive the back cushion 5 to move to a certain degree due to certain elasticity and softness of the back cushion 5, so that the thickness of the support member 2 is adjusted, when the height of the support member 2 on the seat back 1 is adjusted, the two gears 7 are horizontally inserted in the limit groove 9 only after the support member 2 is moved to a proper height, and the side teeth 10 on the two sides of the limit groove 9 are meshed with the two sides of the gear 7, so that the gear 7 cannot rotate, through adjusting support piece 2's height and thickness to make this office chair applicable in the crowd of different statures, increased the device's application scope to a certain extent.

The gear 7 is equipped with one end outer wall of thread groove 8 and is equipped with bearing 11, one side and backplate 3 fixed Assembly that gear 7 was kept away from to bearing 11 through set up bearing 11 between gear 7 and backplate 3, has increased the fluency when people rotate bearing 11, and the regulation work of giving people to support piece 2 brings great facility.

The exposed section of the gear 7 is matched with the depth of the limit groove 9, when the support piece 2 is installed, the gear 7 just can be completely immersed into the limit groove 9, so that the extrusion force of people on the gear 7 when the support piece 2 is used is effectively reduced, and the service life of the device is prolonged to a certain extent.

The medial surface of spacing groove 9 is equipped with first magnetic stripe 12, the one end that gear 7 is close to spacing groove 9 is equipped with the second magnetic stripe 13 with first magnetic stripe 12 adaptation, through the mutual absorption of first magnetic stripe 12 with second magnetic stripe 13 for support piece 2 assembles and does not drop easily on backrest 1.

The sliding groove 14 is formed in one surface, close to the moving plate 4, of the back plate 3, the sliding block 15 matched with the sliding groove 14 is arranged on one surface, opposite to the back plate 3, of the moving plate 4, and the sliding matching of the sliding groove 14 and the sliding block 15 enables the moving plate 4 to be more stable when moving.

The length of the threaded rod 6 is equal to the length of the whole of the back plate 3 and the threaded groove 8, and the moving plate 4 is attached to the back plate 3, so that the redundant gap between the moving plate 4 and the back plate 3 is reduced as much as possible, and the moving range of the moving plate 4 is increased to a certain extent.

The cross-section of back of the body pad 5 is the arc structure, the back of the body pad is ventilative sponge material, through setting up back of the body pad 5 into the arc structure for people lean on the back of the body pad 5 and laminate people's back more.

When the lumbar support adjusting mechanism of the office chair adjusts the support piece 2, the support piece can be directly pulled out from the limiting groove 9 horizontally, so that the gear 7 is separated from the limiting groove 9, the two gears 7 are simultaneously rotated, the threaded rod 6 which is connected with the threaded groove 8 in a threaded manner inside the gear 7 is driven to move back and forth through the rotation of the gear 7, so that the movable plate 4 is pushed to move back and forth, the movable plate 4 can drive the back cushion 5 to move to a certain degree due to certain elasticity and flexibility of the back cushion 5, so that the thickness of the support piece 2 can be adjusted, when the height of the support piece 2 on the seat back 1 is adjusted, the two gears 7 are horizontally inserted into the limiting groove 9 only after the support piece 2 is moved to a proper height, and because the side teeth 10 at the two sides of the limiting groove 9 are meshed with the two sides of the gear 7, so that the gear 7 cannot rotate, adjust through the height and the thickness to support piece 2, thereby make this office chair applicable in the crowd of different statures, the application scope of the device has been increased to a certain extent, when installing support piece 2, because gear 7 just can submerge the spacing groove 9 completely, the extrusion force to gear 7 when people use support piece 2 has effectively been reduced, the life of the device has been improved to a certain extent, through the mutual absorption of first magnetic stripe 12 and second magnetic stripe 13, make support piece 2 assemble on backrest 1 and do not drop easily.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lumbar support adjustment mechanism of office chair, is including setting up support piece (2) inboard at seat back (1), its characterized in that: the support piece (2) comprises a back plate (3), a movable plate (4) and a back pad (5), the movable plate (4) is arranged between the back plate (3) and the back pad (5), the back pad (5) and the back plate (3) are fixedly assembled at the edge, one side of the movable plate (4) is in sliding connection with the back plate (3), the other side of the movable plate (4) is fixedly assembled with the inner side of the back pad (5), a threaded rod (6) is symmetrically arranged on the side, close to the back plate (3), of the movable plate (4), one end, far away from the movable plate (4), of the threaded rod (6) penetrates through the back plate (3) and extends outside, a gear (7) is rotatably arranged on the outer side face of the back plate (3), a threaded groove (8) in threaded connection with one end of the threaded rod (6) is arranged at one end, of the gear (7), a limiting groove (9) is symmetrically arranged on the inner side of the seat back (1), and the inner wall of the limiting groove (9) is symmetrically provided with side teeth (10) which are meshed with the gear (7).

2. An office chair lumbar support adjustment mechanism as set forth in claim 1, wherein: and a bearing (11) is arranged on the outer wall of one end, provided with a thread groove (8), of the gear (7), and one side, far away from the gear (7), of the bearing (11) is fixedly assembled with the back plate (3).

3. An office chair lumbar support adjustment mechanism as set forth in claim 2, wherein: the exposed section of the gear (7) is matched with the depth of the limit groove (9).

4. An office chair lumbar support adjustment mechanism as set forth in claim 3, wherein: the medial surface of spacing groove (9) is equipped with first magnetic stripe (12), gear (7) are close to the one end of spacing groove (9) and are equipped with second magnetic stripe (13) with first magnetic stripe (12) adaptation.

5. An office chair lumbar support adjustment mechanism as set forth in claim 1, wherein: the movable plate is characterized in that a sliding groove (14) is formed in one surface, close to the movable plate (4), of the back plate (3), and a sliding block (15) matched with the sliding groove (14) is arranged on one surface, opposite to the back plate (3), of the movable plate (4).

6. An office chair lumbar support adjustment mechanism as set forth in claim 1, wherein: the length of the threaded rod (6) is equal to the length of the back plate (3) and the whole threaded groove (8), and the moving plate (4) is attached to the back plate (3).

7. An office chair lumbar support adjustment mechanism as set forth in claim 1, wherein: the cross section of the back cushion (5) is of an arc-shaped structure, and the back cushion is made of breathable sponge.