Electric and mechanical stretching apparatus for movable sofa
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Solution Overview
Problem
Existing electromechanical stretching apparatuses of convertible sofas suffer from complex structures, reduced kinetic energy efficiency, shaking, and structural instability due to protruding motor heads, affecting comfort and installation efficiency.
Innovation Solution
A simplified electromechanical stretching apparatus with a motor connected via a guide rail and rotor shafts, featuring a bolted connection for improved structural stability and reduced shaking, and a motor installation method that avoids interference during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex electrically-driven structure with multiple transmission parts is used, then the sofa can achieve stretching and folding functions, but the structure becomes excessively complex and kinetic energy efficiency of the motor deteriorates
Solution Approach 1:
The patent divides the electric actuator into separate functional modules: motor, motor connecting tube, motor movable slider, and motor head fixing part. Each module performs a specific function and can be independently assembled or maintained, reducing overall system complexity while preserving stretching and folding capabilities
Solution Approach 2:
The patent extracts and eliminates unnecessary transmission parts (transmission part, transmission fixed support, rotor shaft transmission part) from the original complex structure. The motor directly drives the electrically-driven connecting rod through the simplified motor connecting tube and motor head, removing redundant mechanical transmission stages that reduced efficiency
2Adaptability or versatility
If a complex electrically-driven structure with rotor shaft transmission parts is used, then stretching function is achieved, but iron support self-locking occurs during rotation causing shaking and affecting comfort
Solution Approach 1:
The patent removes the rotor shaft transmission part and rotary connecting rod from the system. The motor directly connects to the electrically-driven connecting rod through the motor head, eliminating the iron support self-locking mechanism that caused shaking during operation
Solution Approach 2:
The patent introduces a motor connecting tube as an intermediary component between the motor and the electrically-driven connecting rod. This tube provides a stable, controlled connection that prevents unwanted self-locking and shaking while maintaining the stretching function
3Adaptability or versatility
If a motor head fixing part with protruding motor head is used, then electrically-driven connection is achieved, but the motor head protrudes from the electrically-driven connecting rod causing interference when leg part is completely folded
Solution Approach 1:
The patent designs the motor head fixing part to nest within the motor connecting tube, which in turn connects to the electrically-driven connecting rod. This nested arrangement ensures the motor head does not protrude beyond the connecting rod when folded, eliminating interference with the leg part while maintaining electrical connection
4Adaptability or versatility
If multiple transmission parts and motor components are combined, then stretching function is achieved, but installation becomes complex and installation efficiency deteriorates
Solution Approach 1:
The patent segments the electric actuator into distinct modules (motor, motor connecting tube, motor movable slider, motor head fixing part) that can be pre-assembled and tested separately, then installed as a complete unit or individual components, significantly improving installation efficiency
Solution Approach 2:
The motor connecting tube serves multiple functions: it connects the motor to the electrically-driven connecting rod, provides structural support, and houses the motor head fixing part. This multi-functionality reduces the number of separate components that need to be installed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances kinetic energy efficiency, improves comfort and installation efficiency, and ensures structural stability by eliminating shaking and motor interference during folding.
Implementation Method 1
the motor adopted is a motor with a guide rail, the motor movable slider is installed on the guide rail of the motor
Implementation Method 2
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 head is rotationally connected through a second rotor shaft to the motor head fixing part
Data Source
AI summary
The invention is an electromechanical stretching apparatus of a convertible sofa, which consisting of a mechanical stretching apparatus and an electric actuator, the mechanical stretching apparatus being provided with an electrically-driven connecting rod, wherein, 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 said motor connecting tube is fastened on a linkage part of the mechanical stretching apparatus. The said first rotor shaft and the second rotor shaft are both a bolt. By changing the electronic driving device, the invention increases automaticity and comfort of the convertible sofa, and improves installation, removal, maintenance, and operation efficiency of an electric actuator of the convertible sofa.