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.

Claims

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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a schematic front view of an embodiment of the present disclosure when a leg part of a left side component or that of a right side component is completely folded;

[0015] FIG. 2 is a schematic front view of an embodiment of the present disclosure when a leg part of a left side component or that of a right side component is completely unfolded;

[0016] FIG. 3 is a schematic diagram of an embodiment of the present disclosure when a back is inclined horizontally;

[0017] FIG. 4 is a schematic diagram of main components and an operational mode according to an embodiment of the present disclosure, where: 1 represents a first rotor shaft, 2 represents a motor connecting tube, 3 represents a linkage part, 4 represents a second rotor shaft, 5 represents a motor movable slider, 6 represents a motor, 7 represents a motor head fixing part, 22 represents guide rail, and 8 represents an electrically-driven connecting rod; and

[0018] FIG. 5 is a schematic diagram of main components and an operational mode according to the prior art, where in the figures: [0019] 9 represents a comparison electrically-driven connecting rod, 10 represents an electrically-driven square tube, 11 represents an electrically-driven angle iron, 12 represents a transmission part, 13 represents a transmission fixed support, 14 represents a comparison motor head fixing part, 15 represents a comparison electrically-driven connecting rod, 16 represents a motor fixing part, 17 represents a motor tail fixing part, 18 represents a comparison motor movable slider, 19 represents a comparison motor, 20 represents a rotor shaft transmission part, and 21 represents a rotary connecting rod.

DETAILED DESCRIPTION

[0020] The following further describes the present disclosure with reference to embodiments and the accompanying drawings.

[0021] In an embodiment of the present disclosure, an electromechanical stretching apparatus of a convertible sofa includes a mechanical stretching apparatus in the prior art (having a same left side component and right side component, where the left side component is connected to the right side component in a fixed manner by using a fixing part, for example, as described in US200920200532.4, Patent Publication No. 102657449A, and Patent No. 201220668439.8), the mechanical stretching apparatus being installed with an electrically-driven connecting rod 8, and has the following structural features: an electric actuator consists of a motor 6, a motor connecting tube 2, a motor movable slider 5 and a motor head fixing part 7, the motor adopted is a motor with a guide rail 22, a motor head is rotationally connected through a second rotor shaft 4 to the motor head fixing part 7 fastened on the electrically-driven connecting rod 8, the motor connecting tube 2 is fastened through a bolt on a linkage part 3 of the mechanical stretching apparatus (the linkage part 3 is a connecting part used for fixing and transmission in a mechanical stretching apparatus of the prior art, for example, a linkage part as described in Patent No. 200920200532.4, a linkage part as described in Patent Publication No. 102657449A, and a seat support 3 as described in US201220668439.8, and in some documents, another name such as a transmission connecting part may also be adopted), the motor connecting tube 2 is rotationally connected to the motor movable slider 5 through a first rotor shaft 1, and the motor movable slider 5 moves on the guide rail 22 of the motor 6.

[0022] In this embodiment of the present disclosure, the motor movable slider 5 moves along the guide rail 22 of the motor 6, so that a driving force of the motor 6 is consistent to a greatest degree with an unfolding direction in this embodiment, thereby saving energy, reducing mechanical wear and strengthening overall structure.

[0023] In this embodiment, the motion principle is that the motor connecting tube 2 rotationally connected to the motor movable slider 5 through the first rotor shaft 1 is driven by forward movement (toward left side of FIG. 4) of the motor movable slider 5 on the motor 6 along the guide rail 22 of the motor, where a motor head is rotationally connected through the second rotor shaft 4 to the motor head fixing part 7 fastened on the electrically-driven connecting rod 8, and the motor connecting tube 2 is fastened on the linkage part 3 of the mechanical stretching apparatus. Due to personal weight and an acting force of the motor connecting tube 2 driven by the motor movable slider 5, a leg structure of the mechanical stretching apparatus is unfolded first, and when being fully unfolded to a limit and contacting with a contact surface, the leg structure is prevented from being mechanically unfolded, thereby driving a back structure of the electromechanical stretching apparatus of a convertible sofa to incline horizontally, so that the electromechanical stretching apparatus of a convertible sofa performs a procedure of transformation from a state shown in FIG. 1, to a state shown in FIG. 2 and then to a state shown in FIG. 3. On the contrary, when the motor movable slider 6 moves reversely (backward, namely, toward right side of FIG. 4), the electromechanical stretching apparatus of a convertible sofa can perform a procedure of transformation from the state shown in FIG. 3, to the state shown in FIG. 2, and then to the state shown in FIG. 1. When the electromechanical stretching apparatus of a convertible sofa returns to the state shown in FIG. 1 again, that is, the leg part is completely folded, a complete procedure for electrically driving the electromechanical stretching apparatus of a convertible sofa is implemented.

[0024] In this embodiment, a manner of rotational connection of the first rotor shaft 1 and the second rotor shaft 4 is achieved by means of bolt connection, thereby achieving bolt connection of the motor 6; and the motor connecting tube 2 is fastened on the linkage part 3 of the mechanical stretching apparatus by using a bolt, which facilitates installation, removal and maintenance of the motor 6.

[0025] In this embodiment, rotational connection of the rotor shaft transmission part 20 and the rotary connecting rod 21 is removed, so as to solve a problem of shaking in an electrically-driven manner.

[0026] In this embodiment, a novel electrically-driven manner of a convertible sofa is additionally provided, while an original electrically-driven apparatus is removed, which facilitates improving installation, removal, maintenance and operation efficiency of an electric actuator of the convertible sofa, and increasing automaticity and comfort of the sofa.

[0027] It should be recognized that, any simple modification or equivalent change made to the present disclosure shall fall within the protection scope of the present disclosure.