Seat waist synchronous linkage device and seat

Abstract

The invention discloses a seat waist synchronous linkage device and a seat. The seat waist synchronous linkage device comprises a base; a seat frame arranged above the base; a seat frame movement guide mechanism which comprises a guide rod and a sliding groove guide mechanism, wherein the guide rod is arranged at one end of the front end or the rear end of the seat frame, and the sliding groove guide mechanism is arranged at the other end of the front end or the rear end of the seat frame; the seat frame can move relative to the base under the supporting and guiding effects of the seat frame movement guiding mechanism. The device also comprises a waist support connected with one of the seat frame or the base in a sliding mode, wherein the waist support is provided with an initial positionand a waist jacking position; a sliding guide mechanism which drives the waist support to slide along one of the seat frame or the base. Correspondingly, relative displacement is generated between thewaist support and one of the seat frame or the base; the stroke of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base, thatis, the stroke of the waist support is larger, so that the waist of a human body can be jacked quickly when the human body sits, and the purpose of supporting the waist is achieved.

Description

technical field [0001] The invention relates to the field of seats, in particular to a seat waist synchronous linkage device and a seat. Background technique [0002] When a person sits down on the existing seat, the waist of the person who sits in the back generally needs to be close to the backrest, and the waist of the person who sits forward cannot touch the seat, resulting in that the waist cannot be supported; The back cushion is used to support the waist. Although this method can play a certain role, it is not convenient enough and it is troublesome to carry. [0003] French invention patent FR2045120 discloses a linkage system of a seat cushion and a backrest. Figure 1-4 As shown, the linkage system applies the principle of leverage, in which the rod 6 is the power arm, and the rod 4 is the resistance arm. When a person sits down and presses the seat panel 7, the rod 6 moves downward after being pressed, and the rod 4 revolves around the fulcrum 5 moves obliquely d...

AI Technical Summary

Problems solved by technology

[0007] The present invention overcomes the deficiencies in the above-mentioned prior art, and provides a seat waist synchronous linkage device, which not only solves the problem that the traditional seat lumbar support cannot support the waist, but also the seat lumbar device lumbar leans forward When moving, the lumbar support will not tilt downward, but will be supported horizontally forward to the waist and then stop moving forward; in addition, the device adopts the principle of linkage between the connecting rod and the chute, regardless of the weight of the user, it can achieve The effect of supporting the waist; moreover, the accessories used in the device are relatively simple, the cost is low, and it is suitable for large-scale and factory production

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