Strain Relieving Element with Variable Rib Width for Stress Distribution
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Solution Overview
Problem
Existing strain relieving elements fail to maximize stress release and often result in damage to the element or cable when used with portable electrical devices, as they do not effectively manage torsional or bending stress.
Innovation Solution
A strain relieving element with a stress releasing portion featuring a front and rear surface, an intermediate portion, a receiving passage, through cavities, notches, and ribs with varying dimensions and arrangements to distribute stress effectively, including convexes between rows, designed to gradually decrease in width and increase in length along the axis from the rear to the front surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a strain relieving element is molded on the cable, then the connecting strength between the cable and electrical device is enhanced, but the stress is not entirely maximized released and the element or cable may break
Solution Approach 1:
The strain relieving element is divided into multiple functional zones: a bending resistance portion with through cavities and ribs for structural support, and a stress releasing portion with gradually varying cross-section for stress distribution. This segmentation allows each zone to perform its specific function optimally, resolving the contradiction between strength enhancement and stress release.
Solution Approach 2:
Different portions of the strain relieving element have different structural characteristics: the bending resistance portion has rigid ribs and through cavities for strength, while the stress releasing portion has a gradually varying cross-section for stress distribution. This local quality variation allows the element to provide both connecting strength and effective stress release simultaneously.
2Ease of manufacture
If the strain relieving element has uniform structure, then manufacturing is simple, but it cannot effectively manage torsional or bending stress
Solution Approach 1:
The element is segmented into two main portions: a bending resistance portion with uniform ribs and cavities for easy molding, and a stress releasing portion with gradually varying dimensions. This segmentation maintains manufacturing simplicity while achieving effective stress management through the specialized stress releasing portion.
Solution Approach 2:
The cross-sectional dimensions of the stress releasing portion are gradually changed from the bending resistance portion to the cable, creating a smooth transition that effectively manages stress. This parameter change is achieved through standard molding techniques, maintaining ease of manufacture while improving stress management capability.
3Ease of manufacture
If the rib width is constant along the axis, then manufacturing is easier, but the anti-bending functionality is reduced
Solution Approach 1:
The ribs in the bending resistance portion have a specific width optimized for anti-bending functionality, while the ribs in the stress releasing portion gradually decrease in width to facilitate stress release. This local quality variation maintains effective anti-bending functionality while enabling smooth stress transition.
Solution Approach 2:
The rib width variation is introduced along the axial dimension, creating a gradual transition from constant width in the bending resistance portion to decreasing width in the stress releasing portion. This dimensional change enhances anti-bending functionality while maintaining molding simplicity through gradual transitions.
Data Source
AI summary
A strain relieving element, comprising: a front surface, a rear surface opposite to the front surface, an intermediate portion connecting the front surface to the rear surface, a receiving passage passing through the front surface and the rear surface, two rows of through cavities extending inwardly from the intermediate portion at least, a rib dividing the adjacent through cavities in same row and a convex respectively formed between the adjacent rows of the through cavities, and between the adjacent rows of the ribs. The rib near to the rear surface is bigger than the rib far from the rear surface, the width of the ribs are gradually decreased along an axis direction from the rear surface to the front surface.