Mechanical stretching device for movable sofas

Abstract

The invention provides a mechanical stretching device for movable sofas, and belongs to the technical field of sofas. The mechanical stretching device comprises a left component, a right component, a switch component and a self-locking spring, the left component is fixedly connected with the right component through a fixing component, the switch component is mounted on the left component or the right component, the left component and the right component are provided with same foot rests, first foot rods, second foot rods, third foot rods, fourth foot rods, small foot rests, mounting side plates, first connecting rods, front linkage parts, fourth connecting rods, sixth connecting rods, rear supporting parts, front supporting parts, linkage part, rear linkage parts, rotating shaft transmission parts, backrest parts, bottom foots, protection parts, third connecting rods and fifth connecting rods, and safe hand clamping prevention devices capable of preventing fingers from being clamped are arranged at the foot rests of the left component and the right component. The mechanical stretching device is simple in structure, convenient to use and reasonable to limit, legs and backrests in an iron stand are more smoothly unfolded and folded, quality grades are improved, and service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of sofas, and relates to a mechanical stretching device, in particular to a mechanical stretching device for a movable sofa. Background technique [0002] Sofa is a kind of upholstered chair. In people's daily life, sofa has become a very common furniture. Compared with ancient wooden seats, existing cloth or leather sofas can provide people with more comfort. comfortability. With the continuous improvement of people's living standards, people's requirements for furniture are getting higher and higher, and ordinary sofas with single functions will be gradually abandoned by people. [0003] The existing sofas generally have the functions of tilting and resetting the backrest, and unfolding and retracting the legrest. In order to make the adjustment performance of the backrest and the legrest in the sofa more flexible, the backrest and the legrest in the sofa can be individually controlled. Thereby adapting ...

AI Technical Summary

Problems solved by technology

At present, there are generally three major deficiencies in the mechanical stretching devices of existing sofas: 1. The lengths of unfolding and folding are inconsistent, resulting in the inability to open the mechanical stretching device or the collapse of the soft bag before sitting on the functional sofa, which affects the appearance; 2. The design is complicated and the steps are too large. There are many connection points, the connection method and the limit method are complicated, which makes the overall structure of the mechanical stretching device too complicated, which reduces the smoothness of the iron frame during operation, and the possibility of problems during the operation of the iron frame is extremely high; 3. No Design safety anti-pinch device, bulky appearance and structure, reducing the safety and reliability of mechanical stretching device

Images