Seat and back synchronous linking device and seat

Abstract

The invention discloses a seat and back synchronous linking device and a seat. The seat and back synchronous linking device comprises a seat frame, a basic part, a back frame, a tray, a gear transmission mechanism, a connecting rod mechanism and a backward swinging mechanism, wherein the basic part is used for realizing sitting and leaning functions; the back frame is arranged at the rear end of the seat frame and used as a back supporting leaning piece which leans forwards and backwards along the seat frame; the tray is arranged under the seat frame, is used for supporting the seat frame andis connected with a chair base component; the gear transmission mechanism responds to the backward leaning movement of the back frame and moves forwards; the connecting rod mechanism is rotationally connected with the tray; the front part and the rear part of the connecting rod mechanism are correspondingly in transmission connection with the front part of the seat frame and the gear transmissionmechanism; a pushing force for moving the gear transmission mechanism forwards is converted into a driving force for lifting the seat frame; the backward swinging mechanism is correspondingly hinged with the tray and the rear part of the seat frame; and the seat frame, the backward swinging mechanism, the tray and the connecting rod mechanism form a four-connecting-rod mechanism. The seat and backsynchronous linking device disclosed by the invention has the advantages that universalization can be realized, a modularized production mode can be adopted, a product can be customized and mass-produced, the packaging volume is reduced, and the cost is low.

Description

Technical field [0001] The invention relates to a seat, in particular to a seat back synchronization linkage device and a seat. Background technique [0002] In the positioning of chair products, non-scrubbing of the back and waist and self-adaptation of gravity have always been a functional focus of the product's high-end development; current similar products are mostly located on both sides of the chair body, that is, the armrest position. The armrest must wrap or cover the mechanism, and a large armrest cover is required to cover the mechanism, which greatly increases the development cost of the product, restricts the development of the same mechanism, and the overall trend of the shape is limited. [0003] Therefore, it is necessary to develop a chassis-type mechanism to design a chassis-based mechanism while ensuring that the seat does not rub the back and run the waist during the movement of the seat. All mechanisms are hidden under the cushion and are versatile, regardless o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of high cost, complex structure, large volume, and the need to improve and upgrade the seat at the same time for the upgrade of the shape in the prior art, and to provide a universal and low-cost backrest tilting mechanism. Low cost, short development cycle, reduced packaging volume, backrest up and down without rubbing the back or running around, and gravity-adaptive seat-back synchronous linkage device and seat

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