Electric and mechanical stretching apparatus for movable sofa

Abstract

An electromechanical stretching apparatus of a convertible sofa consisting of a mechanical stretching apparatus and an electric actuator, the mechanical stretching apparatus provided with an electrically-driven connecting rod, where the electric actuator consists of a motor, a motor connecting tube, a motor movable slider, and a motor head fixing part, the motor adopted is a motor with a guide rail, the motor movable slider is installed on the guide rail of the motor, the motor head is rotationally connected through a second rotor shaft to the motor head fixing part fastened on the electrically-driven connecting rod, the motor connecting tube is connected to the motor movable slider through a first rotor shaft and the motor connecting tube is fastened on the mechanical stretching apparatus. The motor connecting tube is fastened on a linkage part of the mechanical stretching apparatus. The first and second rotor shaft are both a bolt.

What is claimed is: 
     
         1 . An electromechanical stretching apparatus consisting:
 a mechanical stretching apparatus and an electric actuator,   wherein the mechanical stretching apparatus comprises an electrically-driven connecting rod, and the electric actuator comprises:   a motor comprising a motor head and a guide rail,   a motor connecting bar connected to the mechanical stretching apparatus and the guide rail,   a motor movable slider installed on the guide rail of the motor, and   a motor head fixing part fastened on the electrically-driven connecting rod, and   wherein the motor head of the motor is removably connected through a second rotor shaft to the motor head fixing part fastened on the electrically-driven connecting rod;   wherein the motor connecting bar is removably connected to the motor movable slider through a first rotor shaft, and the first rotor shaft and the motor movable slider are rotationally connected; and   wherein the motor connecting bar is fastened on the mechanical stretching apparatus via at least two connections between one end of the motor connecting bar and the mechanical stretching apparatus.   
     
     
         2 . The electromechanical stretching apparatus according to  claim 1 , wherein the one end of the motor connecting bar is fastened on a first linkage part of the mechanical stretching apparatus via the at least two connections, and another end of the motor connecting bar is fastened on a second linage part of the mechanical stretching apparatus, and the first linkage part and the second linkage part are substantially parallel. 
     
     
         3 . A convertible sofa comprising an electromechanical stretching apparatus, wherein the electromechanical stretching apparatus comprises:
 a mechanical stretching apparatus and an electric actuator,   wherein the mechanical stretching apparatus comprises an electrically-driven connecting rod, and the electric actuator comprises:   a motor comprising a motor head and a guide rail,   a motor connecting bar connected to the mechanical stretching apparatus and the guide rail,   a motor movable slider installed on the guide rail of the motor, and   a motor head fixing part fastened on the electrically-driven connecting rod, and   wherein the motor head of the motor is removably connected through a second rotor shaft to the motor head fixing part fastened on the electrically-driven connecting rod;   wherein the motor connecting bar is removably connected to the motor movable slider through a first rotor shaft, and the first rotor shaft and the motor movable slider are rotationally connected; and   wherein the motor connecting bar is fastened on the mechanical stretching apparatus via at least two connections between one end of the motor connecting bar and the mechanical stretching apparatus.