Cable-Holding Tube Structure for Easy Crushing and Clean Printing
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Solution Overview
Problem
Conventional tubes with printed characters or markings on the outer surface face challenges in being easily crushed, leading to printing issues such as rubbing, misalignment, and white streaks, especially when multiple protrusions are present on the inner surface.
Innovation Solution
The tube design incorporates three protrusions on the inner surface, inclined in a rotational symmetry of 120 degrees, which allows for effective cable support and holding force while being easily crushed, reducing printing issues by minimizing directional crushing difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If multiple protrusions are provided on the inner wall surface to improve holding force, then the tube becomes resistant to crushing, but printing quality deteriorates due to uneven surface and white streaks
Solution Approach 1:
The tube body is designed with differentiated local properties: the inner wall surface has protrusions for high holding force, while the outer peripheral surface is designed to be flat and smooth for high printing quality. This local quality differentiation allows the tube to simultaneously achieve strong cable fixation and excellent printability without compromise.
2Manufacturing precision
If the tube is made easily crushable to improve printing, then the holding force for the cable is insufficient, but providing protrusions increases holding force while making crushing difficult
Solution Approach 1:
The tube structure differentiates between inner and outer surface properties: the inner wall contains protrusions that provide strong holding force for the cable, while the outer peripheral surface is designed to be flat and easily crushable for high-quality printing. This local quality approach resolves the contradiction between holding force and printing ease.
3Device complexity
If a single contact piece protrusion is provided to reduce complexity, then the tube rotates or slips off easily, but multiple protrusions prevent rotation while causing printing issues
Solution Approach 1:
The tube employs multiple protrusions (three or more) on the inner wall surface, strategically positioned to provide sufficient anti-rotation and anti-slip capability. The protrusions are designed with appropriate dimensions and spacing to ensure reliable cable fixation without compromising the flatness of the outer surface for printing.
Solution Approach 2:
The protrusions are arranged in an asymmetric pattern around the inner circumference, with specific angular spacing (e.g., 120 degrees for three protrusions) optimized to prevent rotation while maintaining structural balance. This asymmetric arrangement provides reliable holding force without creating symmetry-induced printing problems.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An object of the present invention is to provide a tube having a holding force and being easily crushed. The present disclosure provides a tube into which an insert can be inserted. The tube into which an insert can be inserted, the tube includes a plurality of protrusions (14A,14B,14C) provided to protrude from an inner wall surface (12A) of the tube and to be inclined with respect to the inner wall surface.