Rotatable Cable Holder Reduces Torsional Stress on Connectors
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Solution Overview
Problem
Cables are prone to breakage or damage due to torsional forces applied during the mounting process, as the stress from twisting or bending is concentrated at the connection part between the connector and the cable, leading to potential breakage or damage, especially at the metal connection terminal and resin-covered leading end.
Innovation Solution
A cable design where the cable body portion can freely rotate relative to the cable holder, reducing torsional stress on the connector attaching part, with a rotatable cable holder that can be made of flexible materials, and can be attached via ring grooves or ball bearings, allowing for smooth rotation and stress relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator holds and rotates the protector to mount the connector, then the connector can be connected to the device, but torsional force is applied to the cable causing breakage or damage at the connection part
Solution Approach 1:
A rotatable coupling mechanism is introduced as an intermediary between the protector and the cable body. This coupling allows relative rotation, absorbing torsional forces before they reach the vulnerable connection part between the metal terminal and resin-covered leading end, thus protecting the cable while still enabling connector mounting operations
2Object-affected harmful factors
If the protector is fixed to prevent cable movement, then the cable is protected from bending damage, but torsional force from operator grip is directly transmitted to the cable
Solution Approach 1:
The coupling mechanism transitions from a fixed connection to a dynamic, rotatable connection. The protector remains fixed to prevent bending damage, while the coupling between the protector and cable body allows controlled rotation, enabling the system to adapt to torsional forces applied during operation rather than rigidly resisting them
Data Source
Figure 1
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Figure 3(A)~3(B)
AI summary
The present invention addresses the problem of significantly reducing torque between a cable and a connector, preventing breakage/damage to the cable, and thus increasing the durability and safety of the cable relative to the prior art when an end part of a cable is grasped and subjected to a bending or twisting action. The cable according to the present invention is provided with a cable body, a connector part attached to an end part of the cable body in the longitudinal direction thereof, and a cable holding device (strain relief) for covering a peripheral surface of the cable body, the cable holding device being provided so as to be able to rotate about the central axis of the cable body in relation to the cable body. When an operator grasps the cable holding device or a portion thereof and connects the connector part to a testing device, etc., even when torsion occurs in the cable, since the cable body side to which the connector part is attached can freely rotate along with the torsion of the cable in relation to the cable holding device, which is grasped by the operator and restricted from moving, the connector attachment portion of the cable is not prone to undergo stress.