Concentric Video Arm Pivot With Twist-Routed Internal Wiring
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Solution Overview
Problem
Conventional seat assemblies for passenger vehicles face durability issues due to wiring components that bend during arm movement, leading to deterioration and reduced lifespan.
Innovation Solution
An articulating arm assembly with a wiring portion extending parallel to the rotation axis, secured by a one-way bearing and friction plate, which minimizes bending and maximizes the life of wiring components by arranging them to twist instead of bend.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wires/cables wrap around portions of the hinge assembly, then the arm can pivot and articulate, but the wires/cables bend during movement which causes durability problems and reduced lifespan
Solution Approach 1:
The wiring portion is repositioned from wrapping around the hinge assembly to extending through the rotation portion parallel to the rotation axis. This dimensional change in wire routing eliminates bending during arm movement while preserving full articulation capability, as the wire now moves linearly through the rotation portion rather than curving around external portions of the hinge assembly.
2Adaptability or versatility
If wires/cables are arranged to wrap around the hinge assembly, then connection to electronic devices is achieved, but the wiring deteriorates due to repeated bending
Solution Approach 1:
The wiring portion extends through the rotation portion parallel to the rotation axis rather than wrapping around external portions of the hinge assembly. This repositioning in a different spatial dimension allows the arm to articulate fully while the wire experiences minimal bending, thereby extending wiring lifespan while maintaining electronic device connection capability.
Solution Approach 2:
The wiring portion is nested within the arm body and rotation portion structure, extending through the rotation portion rather than being externally routed. This nesting protects the wiring from environmental factors and mechanical stress while maintaining connectivity to electronic devices mounted on the arm.
3Ease of operation
If the arm assembly uses conventional hinge wiring arrangement, then mechanical articulation is achieved, but the wiring components suffer from bending-induced fatigue
Solution Approach 1:
The wiring portion is repositioned to extend through the rotation portion parallel to the rotation axis, changing the spatial arrangement from external wrapping to internal linear extension. This dimensional repositioning allows the arm to pivot freely while eliminating the bending-induced fatigue that occurs when wires wrap around external portions of the hinge assembly.
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 solution effectively extends the lifespan of wiring components by reducing bending-induced fatigue, ensuring reliable operation of electronic devices in passenger seats.
Implementation Method 1
The bearing comprises a one-way bearing that secures the rotation portion and the arm body in at least one of (i) the deployed position and (ii) a position between the stowed position and the deployed position
Implementation Method 2
a friction plate disposed between the static portion and the rotation portion
Data Source
AI summary
An articulating arm assembly for a passenger seat includes a static portion attachable to the passenger seat, a rotation portion attached to the static portion such that the rotation portion is pivotable about a rotation axis, an arm body attached to the rotation portion, such that the rotation portion and the arm body are movable between a stowed position and a deployed position, and a wiring portion disposed inside the arm body and extending from the arm body into the rotation portion. The wiring portion extends parallel to the rotation axis from the rotation portion toward and into the static portion.