Fastener Side Wall Gap Prevents Band Cutting and Rattling
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Solution Overview
Problem
Existing fasteners for mounting members, such as wiring harnesses, suffer from reduced stability due to the tying band extending far from the vehicle body, making it difficult to prevent the band's proximal end from being cut and causing rattling looseness.
Innovation Solution
A fastener design featuring a band fastening portion with a passage hole, locking claw, supporting wall, and side wall portions that surround the member, with the band's proximal end portion extending from the supporting wall's outlet end face, creating a gap between the side walls and the proximal end, preventing cutting interference and stabilizing the member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tying band extends from a position which lies greatly apart in an axial direction from the lower end face of the cylindrical main body, then the wiring harness can be tied, but the stability of the mounted wiring harness is reduced
Solution Approach 1:
The patent introduces a pair of side wall portions that extend in the axial direction to create a three-dimensional confinement structure. This adds a new spatial dimension (axial extension with lateral confinement) to the band fastening mechanism, allowing the band to be tied effectively while preventing excessive axial movement that would reduce stability.
Solution Approach 2:
The side wall portions are positioned specifically at the distal end of the cylindrical main body, creating localized structural features. This local quality enhancement provides targeted support where needed (at the band fastening location) without affecting the overall structure, thereby improving stability precisely where the band interacts with the mounting structure.
2Ease of operation
If the band extends farther away from the vehicle body, then the band can be tied easily, but it becomes difficult to prevent the proximal end of the band from being cut
Solution Approach 1:
The side wall portions act as protective barriers that physically shield the proximal end of the band. These wall structures create a confined space that prevents cutting tools from accessing the band's proximal end, while still allowing the band to extend sufficiently for tying operations.
Solution Approach 2:
The side wall portions are pre-positioned to prevent potential damage to the band's proximal end before any cutting operation occurs. By creating a protective barrier in advance, the structure preemptively prevents the harmful action of cutting tools from reaching the band.
3Ease of operation
If the band fastening portion is positioned farther from the mount member, then the band can be fastened, but rattling looseness of the member occurs
Solution Approach 1:
The side wall portions create a dynamic constraint system that allows the band to be fastened at an optimal position while simultaneously preventing excessive movement. The structure provides flexible confinement that adapts to the band's tension while maintaining stable mounting by restricting unwanted movements.
Data Source
AI summary
There is provided a fastener including a band, a band fastening portion and a mounting portion. The band fastening portion includes a passage hole, a locking claw, a supporting wall portion, and a pair of side wall portions. The supporting wall portion extends in a direction from an inlet opening towards an outlet opening and has end faces. The band has a proximal end portion extending from the end face of the supporting wall portion. The pair of side wall portions are disposed so as to define a gap in a widthwise direction between the proximal end portion and themselves. End faces of the pair of side wall portions project further in a passing direction of the band through the passage hole than the end face of the supporting wall portion.