Electrical Wire Cover With Positioning Holes For Secure Tube Fastening
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Solution Overview
Problem
Existing electrical wire protection members struggle to securely fix corrugated tubes of different outer diameters and are prone to disengagement due to vibration, especially when larger diameter tubes are used.
Innovation Solution
An electrical wire protection member with a semicylindrical corrugated tube fixing portion, engagement projection strips, and tying member restricting portions with multiple positioning holes to accommodate various diameters, ensuring secure fastening and preventing disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable tie is wound around the entire outer circumference of the tube insertion portion to fix a small-diameter corrugated tube, then the cable tie and corrugated tube have only a short contact portion, but the corrugated tube may not be fixed properly
Solution Approach 1:
The tube insertion portion is divided into multiple circumferential regions with different cable tie insertion holes positioned at specific locations. This segmentation allows the cable tie to be inserted at optimized positions that maximize contact with corrugated tubes of different diameters, resolving the contradiction between reliable fixing and ease of operation
Solution Approach 2:
Different regions of the tube insertion portion are designed with different characteristics (different insertion hole positions) to accommodate corrugated tubes of different diameters. This local differentiation ensures that each region optimally fixes the corresponding tube size, improving both reliability and ease of operation for various tube types
2Reliability
If no structure for holding the cable tie exists on the opening side of the tube insertion portion, then the design is simple, but the cable tie may be disengaged from the cable tie restricting portion due to vibration
Solution Approach 1:
The cable tie insertion holes are pre-positioned on the opening side of the tube insertion portion at locations that allow the cable tie to be inserted and held before the corrugated tube is fully installed. This preliminary positioning action ensures the cable tie cannot be disengaged due to vibration, while maintaining simple structure
Solution Approach 2:
The cable tie insertion holes serve as intermediary structures that mediate between the cable tie and the tube insertion portion. These holes provide a holding function that prevents disengagement without requiring complex retention mechanisms, thus improving reliability while keeping device complexity low
3Adaptability or versatility
If the distance between the first lock projection and the second lock projection is set at a common multiple of the respective pitches, then corrugated tubes with different valley or peak pitches can be engaged, but larger-diameter tubes require the cable tie to be wound around a larger circumference
Solution Approach 1:
The tube insertion portion is segmented into multiple circumferential regions with specifically positioned cable tie insertion holes. This segmentation allows the cable tie to be inserted at optimized positions that account for both the common multiple pitch requirement and the larger circumference of big-diameter tubes, ensuring both adaptability and fixing reliability
Solution Approach 2:
The solution moves from a single circumferential wrapping approach to a multi-dimensional approach by positioning insertion holes at specific locations around the tube insertion portion. This dimensional change in cable tie placement allows optimal contact with tubes of various diameters while maintaining the common multiple pitch engagement, resolving the contradiction between versatility and reliability
Data Source
AI summary
A electrical wire cover has a corrugated tube fixing portion (29) and engagement projection strips (49) which are integral parts of a cover body (27) which surrounds electrical wires, a electrical wire tie which fixes, that is, tightly fastens, one of first to third corrugated tubes, and tying member restricting portions (53) provided in the corrugated tube fixing portion (29). Each tying member restricting portion (53) has plural, that is, first to third, positioning portions (55, 57, and 59) having different electrical wire tie bridging positions.