Interlockingly extending driving mechanism for electric sofa
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Solution Overview
Problem
Existing electric massage chairs have complex structures and high costs due to large and numerous components, making them inefficient and expensive.
Innovation Solution
An interlockingly extending driving mechanism for electric sofas, featuring a backrest adjusting assembly connected to a footrest adjusting assembly with a supporting rod, a driving unit, and an interlocking unit driven by a transmitting screw, which simplifies the structure and reduces costs by allowing easy extension and folding of the footrest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric push rods are used to drive the footrest assembly, then the footrest can be extended and folded, but the structure becomes complex and the cost increases
Solution Approach 1:
The patent combines the backrest adjusting assembly and footrest adjusting assembly into a single integrated structure. The footrest assembly is connected to the backrest adjusting assembly, and the driving unit serves both functions, reducing the number of independent components and simplifying the overall structure while maintaining the extension and folding functionality
Solution Approach 2:
The driving unit is designed to perform multiple functions: it controls both the backrest angle adjustment and the footrest extension/folding. The transmitting screw mechanism serves as a universal drive system that can actuate different components of the sofa, eliminating the need for separate electric push rods for each function
2Ease of operation
If electric push rods with many components are used, then the footrest function is achieved, but the overall cost of the electric sofa increases
Solution Approach 1:
The patent merges multiple driving functions into a single driving unit with a transmitting screw mechanism, reducing the total number of components that need to be manufactured and assembled. This integration lowers manufacturing complexity and material costs compared to using multiple electric push rods
Solution Approach 2:
The patent extracts the essential driving function from complex electric push rods and implements it through a simpler mechanical transmitting screw mechanism driven by a motor. This extraction of the core function eliminates unnecessary components while maintaining the required functionality
3Device complexity
If the driving unit is located in a concealed position, then the structure is compact, but the driving unit and transmitting screw are difficult to repair
Solution Approach 1:
The patent segments the driving unit and transmitting screw mechanism into a separate, accessible module that can be independently accessed for maintenance. The driving unit is positioned such that it can be reached from the side or front of the sofa without disassembling the entire structure, allowing for easy repair while maintaining a compact overall design
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
The mechanism simplifies the electric sofa structure, reduces costs, and facilitates easy repair by locating the driving unit in an open position, while the worm and worm wheel ensure smooth operation and reduced noise, and limiting protrusions prevent excessive rotation and damage.
Implementation Method 1
the driving unit is drivingly connected with a transmitting screw, an interlocking unit is movably connected to one end, close to the footrest assembly, of the transmitting screw, and when the transmitting screw drives the interlocking unit to move
Implementation Method 2
the transmitting module includes a housing in which a worm and a worm wheel are provided; one end of the worm is drivingly connected with the power module, and the other end of the worm meshes with the worm wheel
Data Source
AI summary
An interlockingly extending driving mechanism for an electric sofa, including a backrest adjusting assembly provided in a sofa seat frame. A footrest assembly is provided at one end, remote from the backrest, of the backrest adjusting assembly, and the backrest adjusting assembly is connected with the footrest adjusting assembly. The footrest adjusting assembly includes a supporting rod which is vertically and fixedly provided on the surface of one side of the backrest adjusting assembly, a driving unit is provided on the supporting rod, the driving unit is drivingly connected with a transmitting screw, an interlocking unit is movably connected to one end, close to the footrest, of the transmitting screw, the interlocking unit is movably connected with the footrest, and when the transmitting screw drives the interlocking unit to move, the interlocking unit drives the footrest assembly to extend or fold.