Chair waist supporting device

Abstract

The invention discloses a chair waist supporting device, and belongs to an accessory of a chair. According to the chair waist supporting device, the problem that an elastic body supporting piece of the conventional supporting device can not meet a requirement for precisely adjusting the convex degree and the supporting position of a waist part and the problem of low buffering performance of a rigid body supporting piece are solved, and requirements of people on comfortableness can be met. The chair waist supporting device comprises a front supporting plate and a rear supporting plate, wherein a compression spring and a convex degree adjustment transmission mechanism are arranged between the front supporting plate and the rear supporting plate; the convex degree adjustment transmission mechanism consists of a left swing arm, a right swing arm, an elastic pressure plate, a convex degree transmission screw rod, a left pull rod and a right pull rod; a convex degree adjustment speed changing box and a convex degree adjustment motor are arranged on the inner side of the rear supporting plate; a position adjustment transmission motor and a position adjustment speed changing box are arranged on the outer side of the rear supporting plate; a bracket is arranged in back of the rear supporting plate; and supporting arms at two ends of the bracket are arranged in through holes of a rear fixing hinge seat on the rear supporting plate.

Description

Technical field [0001] The invention belongs to a seat accessory, and particularly relates to a seat lumbar support device. Background technique [0002] At present, the convexity adjustment of the seat lumbar support device is realized by airbags, by applying tension by elastic steel cables, and by moving the rigid body back and forth in the convex direction. Elastomer supports such as airbags and elastic steel cables can make people feel more comfortable by buffering, but they have the disadvantage of low control accuracy compared to rigid body supports. The rigid body support lacks cushioning performance and cannot meet people's requirements for comfort. Summary of the invention [0003] In view of the problems in the prior art, the present invention provides a seat lumbar support device, which solves the problem that the elastic body support in the existing support device cannot meet the precise adjustment of the waist convexity and the support position, and the rigid body su...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a seat lumbar support device, which solves the problem that the elastic body support in the existing support device cannot meet the precise adjustment of waist convexity and support position, and the rigid body support The problem of poor cushioning performance, while meeting people's requirements for comfort

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