Chair frame with adjustable position of backrest

Abstract

The invention provides a chair frame with adjustable position of a backrest, relating to a chair frame with adjustable and controllable position of the backrest, which is mainly used for a massage chair or a sofa frame. In the chair frame, the inclined angle of a backrest frame can be changed, the backrest frame can be moved forwards, a seat frame can be moved forwards, the structure is simple and the use is convenient. The chair frame is provided with a guide rail seat, the backrest frame, the seat frame and a driving device; the guide rail seat is provided with horizontal guide rails and arc-shaped guide rails; the arc-shaped guide rails are positioned below the horizontal guide rails; the lower end of the backrest frame is movably matched with the arc-shaped guide rails of the guide rail seat; the lower part of the backrest frame is rotatably connected with the rear end of the seat frame; the seat frame is movably matched with the horizontal guide rails of the guide rail seat; the driving device is provided with an electric pushing rod, a swinging rod and a connecting rod; the rear end of the electric pushing rod is hinged with the guide rail seat, and the power output end of the electric pushing rod is hinged with the swinging rod; one end of the swinging rod is hinged with the guide rail seat, and the other end of the swinging rod is hinged with one end of the connecting rod; and the other end of the connecting rod is hinged with the seat frame.

Description

technical field [0001] The invention relates to a chair, in particular to a chair frame mainly used for the adjustable backrest position of a sofa chair or a massage chair. Background technique [0002] Existing massage chairs (or sofa chairs for leisure) for health care can generally only adjust the inclination angle of the backrest. Therefore, when the human body needs to adjust the sitting posture in order to be more comfortable or to massage better, it is necessary to adjust the inclination angle of the chair backrest and the position of the seat to change the center of gravity position, but the backrest of the existing chair structure is often blocked by the wall, The tilting function cannot be realized; and the seat is generally fixed, even if the inclination of the chair backrest changes, the human body experience is still unsatisfactory because the position of the seat cannot be changed accordingly, and the massage position is also limited. As the disclosed structur...

AI Technical Summary

Problems solved by technology

[0002] Existing massage chairs (or sofa chairs for leisure) for health care can generally only adjust the inclination angle of the backrest. Therefore, when the human body needs to adjust the sitting posture in order to be more comfortable or to massage better, it is necessary to adjust the inclination angle of the chair backrest and the position of the seat to change the center of gravity position, but the backrest of the existing chair structure is often blocked by the wall, The tilting function cannot be realized; and the seat is generally fixed. Even if the inclination of the chair backrest changes, the position of the seat cannot be changed accordingly, and the human body experience is still unsatisfactory, and the massage position is also limited.

Although the above structure realizes the forward and backward movement through the guide rail and the pivoting structure, it only moves forward and backward together with the seat and the backrest, and cannot realize the adjustment of the inclination angle of the backrest while the relative position of the backrest moves forward and backward

Images