CN210611605U

CN210611605U - Waist rest height adjusting device of chair back

Info

Publication number: CN210611605U
Application number: CN201921559822.8U
Authority: CN
Inventors: 蔡轩进
Original assignee: Zhongshan Songlin Furniture Co ltd
Current assignee: Zhongshan Songlin Furniture Co ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-05-26
Anticipated expiration: 2029-09-18
Also published as: DE102020124028A1; JP3229180U; DE102020124028B4

Abstract

The utility model provides a waist of back of chair leans on high adjusting device, be the below department a little on the back of the chair support that is equipped with the back above it, install one and receive the torsion of adjusting rod and drive rotatory worm, and the first gear of meshing with, simultaneously first gear is coaxial again and establishes a synchronous pivoted second gear, and establish one can gliding waist back from top to bottom on the back of the chair support of back below, and be equipped with the rack with second gear meshing behind the waist back, make the person of taking on the chair extend adjusting rod department with one hand or both hands after, carry out just or anti-twist reverse operation, the adjustment of position about just can driving the waist back easily, and then the adjustment operation that lets the waist lean on is more simple and easy, and the waist after the adjustment leans on can not take place the displacement yet.

Description

Waist rest height adjusting device of chair back

Technical Field

The utility model relates to an it leans on and can slide from top to bottom along the back of the chair support to establish a waist that can support person's waist on the back of the chair, is equipped with again on the back of the chair support in addition with the worm meshing and parallel a first gear of second gear, and the worm wears to establish again and can supply user pivoted adjusting lever, makes the waist lean on establish one simultaneously with the tooth row of second gear meshing, makes through twisting the adjusting lever and rotatory drive worm and first, the tooth row is driven again to the gear, lets the waist lean on the adjustment that can go on position from top to bottom.

Background

The backrest of a common office chair is used for leaning of the back of a seat occupant, the aim is to reduce the force required by straightening of the back of the seat occupant, so that the seat occupant can obtain longer sitting and comfortable support, meanwhile, besides the backrest for leaning of the back of the seat occupant, a waist rest is additionally arranged below the backrest, the aim is to provide support of the waist of the seat occupant, and the overall comfort level during sitting is improved.

However, the lumbar support provided on the backrest is usually designed in a fixed manner, that is, it is located at a fixed height and cannot be adjusted in height, so that the lumbar of the passengers with different heights may not be fully supported by the lumbar support, and the lumbar support cannot exert a real effect.

In the known patent, the CN2612288Y patent proposes a lumbar support capable of adjusting height up and down, which is a lumbar support having embedded hooks at two sides of the body and adjustable slots for the embedded hooks to hook into at two sides of the back frame at the corresponding position, so that the embedded hooks can slide up and down in the adjustable slots, and the lumbar support body is supported by the tightened back net body, so that the lumbar support will not move when the lumbar support is not adjusted by applying force; on the contrary, the waist support can be slid to a position suitable for the waist of the rider to lean against by pulling the waist support by the up-and-down force application.

However, when the above-mentioned lumbar support structure capable of being adjusted up and down is adjusted up and down, the rider must apply force on both sides equally, otherwise the rider is easily inclined, and the adjustment is difficult, and the adjustment method is usually that the rider sits on the chair and leans on the back, then extends both hands backward to both sides of the lumbar support, and then applies force to adjust the lumbar support up and down to the position suitable for the waist to lean on, but the adjustment method of applying force backward with both hands backward is easily uneven, so that the lumbar support is inclined, and the adjustment is difficult, and is also a difficult adjustment method.

In addition, the waist rest is supported and positioned by the tight force of the net body of the chair back so as not to move, but once the net body is slightly loosened due to long-time leaning, the supporting force of the waist rest can be greatly reduced, so that the unstable positioning happens, and even the problem that the waist rest can not be positioned and slides downwards occurs.

SUMMERY OF THE UTILITY MODEL

The reason is, in order to improve the trouble and difficult and probably because of the back of the chair net body gliding problem in the adjustment of aforementioned known waist back, the utility model provides install a worm and the gear that can receive the rotatory drive of an adjusting lever on the back of the chair support promptly to make the gear mesh with the tooth row that sets up behind the waist back of the cunning on the back of the chair support, let the person of taking as long as rotate the adjusting lever with one hand or both hands, just can order about the waist easily and lean on the adjustment of going up and down, just after the waist is adjusted to suitable high department, the problem that just can not take place the slip displacement again simultaneously.

The utility model provides a technical scheme that its technical problem adopted is:

a lumbar support height adjusting device of a chair back is characterized in that: a backrest is arranged above a backrest support, a waist rest capable of sliding up and down is arranged on the backrest support below the backrest, a longitudinal tooth row is arranged on the back surface of the waist rest, a second gear meshed with the tooth row is arranged on the backrest support at the corresponding position of the tooth row, a first gear rotating synchronously is coaxially arranged on the second gear, a containing groove is concavely arranged on the backrest support, a support shaft is arranged in the containing groove, the first gear and the second gear are fixed on the support shaft, an adjusting rod crossing the containing groove is further arranged on the backrest support, the adjusting rod penetrates through a worm meshed with the first gear and fixed in the containing groove, and the waist rest can be driven to adjust the up-and-down position through the rotation of the adjusting rod via the first gear, the second gear and the tooth row.

Therefore, through the aforesaid the utility model discloses the waist that supports the person's waist on the back of the chair leans on, through the position height that the adjustment waist just can be easily by the adjusting lever, not only lets the waist on the back of the chair of same chair lean on, and adjustable to the person of the person who is suitable for different heights leans on outside, more lets the operation of adjustment more simple and easy, and makes the waist of after the adjustment lean on the problem that can not take place the slip aversion again.

The present invention will be further explained with reference to the drawings and examples.

Drawings

Fig. 1 is a schematic perspective view of the chair back of the present invention.

Fig. 2 is a perspective exploded view of the chair back of the present invention.

Fig. 3 is a schematic perspective exploded view of the chair back of the present invention in another direction.

Fig. 4 is a schematic side sectional view of the chair back of the present invention.

Fig. 5 is a schematic view of the back rest of the chair of the present invention adjusted upward.

Fig. 6 is a schematic view of the downward adjustment of the back rest of the chair of the present invention.

Description of reference numerals: 1-chair back; 11-a backrest; 12-waist back; 121-a guide groove; 122-tooth row; 13-chair back support; 130-shaft hole; 131-a containing groove; 132-a boss; 133-fulcrum; 14-an adjusting rod; 141-rotating rod; 142-a stem; 151-worm; 152-a first gear; 153-second gear.

Detailed Description

Referring to fig. 1, the structure of the chair back 1 of the present invention comprises a backrest support 13, a backrest 11 disposed above the backrest support 13, a lumbar support 12 disposed below the backrest 11 and capable of sliding up and down, and an adjusting rod 14 disposed on the corresponding backrest support 13 and capable of adjusting the lumbar support 12 up and down.

As shown in FIGS. 2 to 4, the vertical adjustment structure of the lumbar support 12 is that a receiving groove 131 is formed on the backrest support 13 corresponding to the lumbar support 12, a support shaft 133 is further formed in the receiving groove 131, meanwhile, a through shaft hole 130 is arranged on the side surface corresponding to the containing groove 131 on the chair back bracket 13, a worm 151 is arranged in the containing groove 131, the adjusting rod 14 includes a rotating rod 141 which can pass through the axle hole 130, and then cross into the containing groove 131 to be fixed with the worm 15, the two ends of the rotating rod 141 are extended to respectively install a rotating handle 142 convenient for operation, so that the worm 151 can be driven to rotate by twisting the rotating handle 142 at either end or both ends through the rotating rod 141, and two first gears 152 and a second gear 153 are further provided, which are coaxially arranged in parallel and synchronously rotate, so that the first and

second gears

152, 153 are axially arranged on the fulcrum 133 in the accommodating groove 131, and the worm 151 and the first gear 152 are meshed together.

In addition, the upper and lower sides of the backrest support 13 corresponding to the lumbar support 12 are respectively provided with a convex guide portion 132, the lumbar support 12 corresponding to the convex guide portion 132 is provided with a guide groove 121 for sliding, and then the lumbar support 12 is locked at the convex guide portion 132 by a screw, so that the lumbar support 12 can slide up and down under the guidance of the convex guide portion 132 and the guide groove 121.

Meanwhile, a longitudinally arranged tooth row 122 engaged with the second gear 153 is provided at the back of the lumbar support 12 corresponding to the second gear 153 provided on the backrest support 13, so that the lumbar support 12 is driven to slide up and down by the forward and reverse rotation of the second gear 153 through the tooth row 122.

Therefore, referring to fig. 5 and 6, when the rider sits on the chair and extends backward to the back of the lumbar support 12 with one or both hands, the rotation handle 142 of the adjustment rod 14 can be easily twisted forward or backward, so that after the worm 151 rotates forward or backward via the rotation rod 141, the first gear 152 engaged therewith drives the lumbar support 12 to move upward or downward to a proper position for leaning on the waist through the second gear 153 engaged with the gear row 122, and the adjustment procedure is completed.

Therefore, the rider can easily adjust the vertical position of the lumbar support 12 with one or both hands by the above-described operation method without the problem of the lumbar support 12 being inclined during adjustment, and the adjusted lumbar support 12 is not displaced to ensure the accuracy of the position.

Claims

1. A lumbar support height adjusting device of a chair back is characterized in that: a backrest is arranged above a backrest support, a waist rest capable of sliding up and down is arranged on the backrest support below the backrest, a longitudinal tooth row is arranged on the back surface of the waist rest, a second gear meshed with the tooth row is arranged on the backrest support at the corresponding position of the tooth row, a first gear rotating synchronously is coaxially arranged on the second gear, a containing groove is concavely arranged on the backrest support, a support shaft is arranged in the containing groove, the first gear and the second gear are fixed on the support shaft, an adjusting rod crossing the containing groove is further arranged on the backrest support, the adjusting rod penetrates through a worm meshed with the first gear and fixed in the containing groove, and the waist rest can be driven to adjust the up-and-down position through the rotation of the adjusting rod via the first gear, the second gear and the tooth row.