Wire Harness Clip Sealing with Elastic Adhesive Sheet
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Solution Overview
Problem
Conventional wire harness securing structures face challenges in achieving superior sealing performance due to limitations in elasticity and uniform compression of securing films and clips, leading to potential water or dust ingress into panels.
Innovation Solution
A wire harness securing structure utilizing a self-adhesive sheet with elasticity, which shrinks in thickness when pressed and restores when released, is used to securely cover the wire harness clip and plate portion, ensuring firm contact with the panel's outer periphery and maintaining sealing performance even with slight displacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional securing film is used to cover the wire harness clip, then the wire harness can be secured to the panel, but the sealing performance is insufficient due to lack of elasticity and uniform compression
Solution Approach 1:
The patent changes the physical parameters of the securing film by selecting materials with specific elastic properties and controlling thickness parameters (0.5-2.0mm) to achieve both sealing performance and structural simplicity. The elastic recovery rate is controlled at 50-150% to ensure proper compression and sealing.
Solution Approach 2:
The patent uses composite material structures combining the securing film with the wire harness clip, where the film material is selected from specific polymers (polyethylene, polypropylene, etc.) to achieve both mechanical securing and sealing functions through material properties rather than complex structural design.
2Device complexity
If the securing film is made thinner to reduce complexity, then the structure becomes simpler, but the sealing performance deteriorates due to insufficient compression capability
Solution Approach 1:
The patent optimizes the thickness parameter within a specific range (0.5-2.0mm) to balance structural simplicity and sealing performance. This parameter optimization ensures the film is thin enough to be simple yet thick enough to provide sufficient compression and sealing when elastically deformed during installation.
3Reliability
If the adhesive sheet is highly elastic to improve sealing, then sealing performance improves, but the cost of materials increases
Solution Approach 1:
The patent selects from specific polymer materials (polyethylene, polypropylene, polyester, vinyl chloride) with controlled elastic recovery rates (50-150%) to achieve the required sealing performance at reasonable manufacturing costs, avoiding unnecessarily expensive highly elastic materials while maintaining adequate sealing.
4Reliability
If additional waterproof packings are added to improve sealing, then sealing performance improves, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent makes the securing film perform multiple functions simultaneously: mechanical securing of the wire harness clip to the panel and waterproof sealing of the penetration hole. This multi-functionality eliminates the need for separate waterproof packings, reducing structural complexity while maintaining sealing performance.
Solution Approach 2:
The patent merges the sealing function with the securing film structure itself, combining what would traditionally be separate components (securing mechanism and sealing element) into a single integrated component, thereby simplifying the overall device structure.
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
This solution provides a simple, cost-effective wire harness securing structure with superior sealing performance for panel holes, preventing water and dust ingress while optimizing wiring paths and reducing the need for additional waterproof packings.
Implementation Method 1
the adhesive sheet has elasticity so that, when applied with pressure the adhesive sheet shrinks in a thickness direction of the adhesive sheet and when the pressure is removed thickness of the adhesive sheet is restored
Implementation Method 2
when the latch portion is press-fitted and latched to the hole of the panel, the adhesive sheet between the plate portion and the panel is compressed and contacts firmly with an outer periphery portion of the hole
Data Source
AI summary
A wire harness securing structure secures a wire harness to a panel using a wire harness clip having a plate portion and a latch portion provided at the plate portion to be press-fitted to a hole of the panel. The latch portion includes a post extending from the plate portion and a pair of latch pieces extending from an end of the post toward the plate portion and having an end which engages with an edge of the hole. The plate portion and the wire harness are covered and secured by the self-adhesive sheet. A surface of the self-adhesive sheet facing the panel contacts with the end of the latch piece before the latch portion is press-fitted. When the latch portion is press-fitted and latched to the hole, the adhesive sheet between the plate portion and the panel is compressed and contacts firmly with an outer periphery of the hole.