Sofa Chair Posture Mechanism for Enhanced Zero-Gravity Experience
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Solution Overview
Problem
Existing zero-gravity chairs have a small included angle between the seat plane and the horizontal plane when in the fully lying posture, resulting in a less noticeable zero-gravity experience and potential interference with the electric motor due to backrest sinking.
Innovation Solution
A sofa chair design with a chair frame assembly movably connected to a base via a connection rod structure, allowing the chair to switch between sitting, TV, and fully lying postures. The fully lying posture has an included angle greater than 26 degrees and less than 30 degrees, and a height of 60 mm to 100 mm, enhancing the zero-gravity effect without interfering with the electric motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backrest sinks to implement zero-gravity effect, then the user comfort is improved, but the backrest interferes with the electric motor
Solution Approach 1:
The patent divides the chair structure into separate functional modules: the backrest assembly and the leg assembly are independently controllable. The backrest can sink to achieve zero-gravity effect while the leg assembly extends to compensate for the space, preventing interference with the electric motor. This segmentation allows each component to perform its function without interfering with others.
Solution Approach 2:
The patent introduces a multi-dimensional adjustment mechanism where the backrest sinking motion (vertical dimension) is compensated by leg extension (horizontal dimension). This dimensional transformation allows the system to achieve zero-gravity effect while maintaining adequate clearance for the motor by moving mass from one spatial dimension to another.
2Ease of operation
If the included angle between seat plane and horizontal plane is increased, then the zero-gravity experience is more noticeable, but the structural complexity increases
Solution Approach 1:
The patent employs dynamic adjustment mechanisms that allow the chair to transition between different postures (sitting, reclining, zero-gravity) with optimized included angles. The connection rod structure enables smooth transitions and maintains the optimal 26-30 degree angle range dynamically, providing noticeable zero-gravity experience without requiring overly complex fixed structural arrangements.
Data Source
AI summary
A sofa chair includes a base, a chair frame assembly, a backrest assembly and a leg telescoping assembly. The chair frame assembly includes a chair frame bracket and a chair frame disposed on the chair frame bracket. The chair frame assembly is movably connected to the base by a connection rod structure. The sofa chair is configured to, in response to changing the state of the connection rod structure, switch between the sitting posture, the TV posture, and the fully lying posture. When the sofa chair is in the fully lying posture, the first included angle between the chair frame and the horizontal plane is greater than 26 degrees and less than 30 degrees, and the first height between the lowest point of the chair frame and the ground is 60 mm to 100 mm.