Seat Rotation Assembly With Locking Arm and Fluid Resistance
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Solution Overview
Problem
Seating assemblies lack a mechanism to effectively manage the movement and positioning of seatbacks relative to seats, particularly in reducing the volume of chambers filled with fluid compositions when external forces are applied, which affects the comfort and functionality of the seating system.
Innovation Solution
A rotation assembly comprising a first portion, a second portion, and an arm portion, where the arm portion is rotatably coupled to the second portion and can transition between engaged and disengaged states, allowing the second portion to move relative to the first portion, and the chamber is filled with a fluid composition like liquid nanofoam that resists compression, enabling controlled rotation and adjustment of the seatback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the arm portion is in the engaged state to prevent unwanted movement, then the stability of the rotation assembly is improved, but the adaptability of the seatback rotation is reduced
Solution Approach 1:
The rotation assembly transitions between two dynamic states: engaged state where the tab is received within the hole to prevent movement, and disengaged state where the tab is dislocated from the hole to allow movement. This dynamic switching resolves the contradiction by providing both stability when needed and adaptability when needed through state transition rather than fixed design
Solution Approach 2:
The system changes the positional parameter of the tab relative to the hole to switch between states. When the tab is positioned within the hole, stability is achieved; when dislocated, adaptability is achieved. This parameter change (position of tab) allows the system to resolve the contradiction between stability and adaptability
2Force
If the chamber volume is reduced when seatback rotates away from seat, then the fluid composition resistance to compression is improved, but the device complexity increases
Solution Approach 1:
The rotation assembly utilizes a chamber filled with fluid composition (liquid nanofoam) that resists compression. When the seatback rotates away from the seat, the chamber volume decreases and the fluid composition provides compressive resistance. This pneumatic/hydraulic approach provides force resistance without adding mechanical complexity such as springs or dampers
Solution Approach 2:
The system changes the volume parameter of the chamber through the rotational movement of the second portion relative to the first portion. As the seatback rotates, the chamber volume decreases, and the fluid composition's compressive resistance increases accordingly, providing force control through parameter change rather than complex mechanical means
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 rotation assembly prevents unwanted movement of the second portion relative to the first portion in the engaged state and allows controlled reduction of the chamber volume when the arm portion is disengaged, providing a comfortable and functional seating experience by resisting compression and allowing for predetermined rotational compliance.
Implementation Method 1
the chamber is filled with a fluid composition; the fluid composition resists compression when the volume of the chamber is decreased; the fluid composition is a liquid nanofoam
Data Source
AI summary
A seating assembly includes a rotation assembly. The rotation assembly includes a first portion, a second portion, and an arm portion. The first portion includes an inner wall, an outer wall, and a floor extending between the inner wall and the outer wall. The second portion is movable relative to the first portion. The arm portion includes a first end, a second end, and a tab. The first end of the arm portion is rotatably coupled to a circumferential surface of the second portion. The arm portion is movable between an engaged state and a disengaged state relative to a hole defined by a leg of the first portion and an opening defined by the second portion.