Bolt-Mounted Wiring Harness Clip With Dual Thread-Groove Engagement
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Solution Overview
Problem
Conventional cable ties or clips used to attach wiring harnesses to vehicle panels can be easily separated from the panel when an extraction force is applied, leading to unintended detachment of the wiring harness.
Innovation Solution
A clip design featuring a holding base with a buckle and elastic belt for securing the wiring harness, and a connecting base with flexible engagement strips and pressing blocks that engage the bolt's thread groove, ensuring secure attachment even when an extraction force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If engagement claws are used to engage the thread groove of the bolt, then the connecting base can be connected to the object member, but the clip can be easily separated when extraction force is applied
Solution Approach 1:
The engagement structure is divided into multiple independent engagement claws (first engagement claw and second engagement claw) that engage different portions of the thread groove. This segmentation allows the load to be distributed across multiple engagement points, preventing single-point failure and improving resistance to extraction forces.
Solution Approach 2:
Different portions of the thread groove are engaged by different engagement claws, creating localized engagement zones. The first engagement claw engages a first portion of the thread groove while the second engagement claw engages a second portion, allowing each claw to optimize its engagement geometry for specific load conditions and improving overall connection reliability.
2Ease of operation
If engagement strips are made flexible to allow insertion, then the bolt can be introduced into the bolt introduction hole, but the engagement claws can be disengaged from the thread groove under extraction force
Solution Approach 1:
The engagement strips are pre-configured in a flexed state that allows them to be pushed outward during bolt insertion. This preliminary positioning enables easy insertion while the strips automatically return to their engaged position after insertion, maintaining reliable engagement without requiring additional fastening actions.
Solution Approach 2:
The engagement strips are designed to be flexible rather than rigid, allowing them to dynamically adjust their position during insertion and under load. The strips can flex outward to accommodate bolt insertion and then return to engage the thread groove, providing both ease of operation and reliable retention through elastic deformation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The clip design prevents separation from the object member by maintaining engagement with the bolt's thread groove, ensuring the wiring harness remains attached to the vehicle panel under extraction forces, until an excessive force is applied.
Implementation Method 1
a pair of engagement strips (24) formed on an inner surface (23) and having pressing blocks (25) formed on distal end portions of inner surfaces of the engagement strips (24) and oppositely projected toward a center of the bolt introduction hole (22)
Implementation Method 2
the engagement claws (27) engage predetermined portions of the thread groove (4b) of the bolt (4)
Data Source
AI summary
A clip comprising a connecting base including a bolt introduction hole that is configured such that a bolt member formed on an object member is introduced thereinto. The connecting base includes flexible engagement strips formed on an inner surface thereof and having pressing blocks. The pressing blocks respectively include engagement claws formed on proximal end portions of inner surfaces thereof. The engagement claws engage the predetermined portions of thread groove of the bolt member, so that the connecting base is connected to the object member. In a connected condition of the connecting base, when the engagement claws are disengaged from the predetermined portions of the thread groove due to an extraction force, edge portions formed on distal end portions of the inner surfaces of the pressing blocks engage different portions of the thread groove of the bolt member.