Backrest height adjusting device

A technology of a height adjustment device and a backrest, which is applied in the field of seating, can solve the problems that the free height adjustment of the back frame cannot be achieved smoothly, can only be adjusted by pressing one section at a time, and the height adjustment is stuck, etc., and achieves a simple mechanism, smooth sliding and adjustment smooth effect

Pending Publication Date: 2021-07-23
安吉三久智能家居科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the chair can adjust the height of the backrest, it is achieved by pressing the pins of the shrapnel to cooperate with different positioning holes, so that when adjusting the height of the back frame, it can only be adjusted section by section, and the free height adjustment of the back frame cannot be smoothly realized; and the shrapnel The pins sometimes get stuck, causing stuttering when adjusting the height

Method used

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  • Backrest height adjusting device

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specific Embodiment approach

[0032] Such as Figure 1-8 As shown, the present invention provides a backrest height adjustment device, which includes a back frame 1 and a support frame 2 , and a sliding limit mechanism 3 is provided between the back frame 1 and the support frame 2 .

[0033] Such as Figure 1-5As shown, the back frame 1 is connected to the support frame 2, the back frame 1 is a "mouth" frame, the back frame 1 includes upper and lower cross bars 4, 5 and the upper and lower cross bars 4 , 5 backside bars 6 on both sides, the support frame 2 includes a horizontal connection base plate 7 and a longitudinal support frame 8; and the lower cross bar 5 and the support frame 8 are slidingly fitted, specifically: the The support frame 8 includes side bars 9 located on both sides, and corresponding mounting grooves 10 are provided symmetrically on the left and right at the rear end of the lower cross bar 5, and convex ribs 12 protruding backward are provided in the mounting grooves 10, The front e...

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Abstract

The invention discloses a backrest height adjusting device, which comprises a back frame and a supporting frame, and the back frame is in sliding fit with the supporting frame. A sliding limiting mechanism is arranged between the back frame and the supporting frame and comprises a limiting pin, a limiting groove and a control switch for controlling the transverse movement of the limiting pin; the control switch is in sliding fit with the back frame, and the upper and lower ends of the control switch protrude out of the back end of the back frame to form upper and lower pressing parts; when the back frame is in a use state, the limiting pin is inserted into the limiting groove; and when the back frame is in an adjusting state, the upper pressing part is stressed downwards to enable the lower pressing part to protrude downwards to form a first adjusting direction identification body, or the lower pressing part is stressed upwards to enable the upper pressing part to protrude upwards to form a second adjusting direction identification body, meanwhile, the limiting pin leaves the limiting groove, and the back frame is stressed to move in the moving direction of the control switch. The operation is quick and labor-saving, and the device is simple and practical.

Description

technical field [0001] The invention relates to the field of seats, in particular to a backrest height adjusting device. Background technique [0002] At present, the backrest height of existing chairs on the market is often set at the factory, which is inconvenient to adjust and has a narrow application range. short. The same person sometimes needs a higher backrest, and sometimes needs a lower backrest. Existing chairs cannot satisfy these individual requirements. Therefore, there is an urgent need for a chair that is applicable to different heights and can adjust the height of the backrest. [0003] The Chinese invention patent of CN201611224078.7 discloses a "chair with adjustable backrest height". The chair includes a seat, a backrest and chair feet. The backrest includes a fixed part and a lifting part. and the wide backing plate in the middle; the lifting part includes lifting columns on both sides, a lifting backing plate in the middle and a horizontal plate conn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47C7/40
CPCA47C7/402
Inventor 戴龙飞
Owner 安吉三久智能家居科技有限公司
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