Movable Part Composite Cable Segmented Wire Design
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Solution Overview
Problem
Conventional movable part composite cables require larger wiring spaces due to bundled electric wires, leading to increased diameter and deterioration in signal transmission properties, especially during high-frequency signal transmission.
Innovation Solution
A movable part composite cable design featuring power supply wires with insulated electric wires covered by resin tapes and signal wires with smaller diameters, arranged such that power wires are in contact with each other but not directly with signal wires, with a jacket covering the aggregate, allowing stress concentration in power wires and minimizing contact areas to reduce signal wire stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If electric wires are wired bundled together with a binding member, then the wires are kept organized and together, but the outer diameter increases and wiring space requirement increases
Solution Approach 1:
The cable is segmented into multiple independent wire groups, each surrounded by its own covering member. Power supply wires form one group and signal wires form another group, with each group independently covered. This segmentation allows the wires to remain organized and together while reducing the overall outer diameter compared to a single bundled structure, as each covering member can be optimized for its specific wire group.
2Stability of the object's composition
If power wires and signal wires are bundled together, then they remain together during movement, but signal wires are subjected to pulling forces that deteriorate transmission properties
Solution Approach 1:
The cable structure is segmented into a power supply wire group and a signal wire group, with each group independently covered by its own covering member. This segmentation isolates the signal wires from the larger pulling forces experienced by the power wires, while still maintaining the overall integrity of the cable during movement. The signal wires are protected from direct transmission of pulling forces.
Solution Approach 2:
The covering members act as intermediary structures between the power supply wires and signal wires. These covering members absorb and distribute mechanical stresses, preventing direct force transmission from the power wire group to the signal wire group. This intermediary structure protects the signal wires while maintaining bundle integrity.
3Ease of manufacture
If signal wires have the same diameter as power wires, then wiring is simplified, but the cable outer diameter increases
Solution Approach 1:
The cable structure applies local quality by having different wire diameters in different regions/groups. The power supply wires have a larger diameter appropriate for their function, while the signal wires have a smaller diameter appropriate for their function and the space constraints. Each wire group is covered by its own covering member that is sized appropriately for that specific group, optimizing the overall cable diameter.
Data Source
AI summary
A movable part composite cable includes a plurality of power supply wires being designed for electric power supply, which respectively include a plurality of insulated electric wires being laid together and being covered by each covering member, the plurality of power supply wires being arranged in contact with each other on surfaces of their respective covering members, one or more signal wires being designed for signal transmission, each signal wire having an outer diameter smaller than an outer diameter of each power supply wire, and a jacket, which is being provided over an outer periphery of an aggregate including the plurality of power supply wires and the one or more signal wires that are laid together. The power supply wires and the signal wires are not in direct contact with each other, or the power supply wires and the signal wires are in direct contact with each other with a contact area therebetween being smaller than a contact area between the power supply wires.