Wiring Member Integrated Built-in Component for Door Sealing
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Solution Overview
Problem
The existing techniques for fixing a wiring member to a box-like member, such as a door, compromise water sealing and sound insulation due to the need for holes in the door's inner plate for clipping the wiring harness.
Innovation Solution
A wiring member integrated built-in component with housing grooves incorporated into the box-like member, allowing the wiring to be housed within the component, reducing the need for holes and enhancing sealing and insulation by using a resin component with a hot-melt crush part to secure the wiring without welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking hole is formed in the inner plate of the door for inserting a clip to fix the wire harness, then the wire harness can be securely fixed, but the water sealing properties and sound insulation properties of the door deteriorate
Solution Approach 1:
The wire harness holding part is merged with the door resin component into a single integrated structure. The wiring member housing groove is formed directly in the door resin component, eliminating the need for separate fixing operations through holes in the inner plate. This integration maintains fixing reliability while preserving the integrity of the door's sealing and insulation properties.
Solution Approach 2:
The door resin component acts as an intermediary structure between the inner plate and the wire harness. Instead of directly penetrating the inner plate with locking holes, the wiring member is housed in the groove of the resin component, which is then fitted over the inner plate. This intermediary approach provides secure fixing without compromising the inner plate's sealing properties.
2Reliability
If multiple holes are formed in the door for fixing the wiring member, then the wiring member can be securely attached, but the door's weight and structural integrity are reduced
Solution Approach 1:
The fixing function is merged into the door resin component itself through the integrated wiring member housing groove. The groove structure provides attachment reliability without requiring additional holes in the door, thereby maintaining the door's structural integrity and minimizing weight increase from additional fastening elements.
3Reliability
If a clip is inserted into a locking hole to fix the wire harness, then the wire harness is securely held, but the manufacturing complexity increases due to additional assembly steps
Solution Approach 1:
The wire harness holding function is merged into the door resin component during the molding process. The wiring member housing groove is formed as an integral part of the resin component, eliminating the need for separate clip insertion and locking hole formation steps. This reduces assembly complexity while maintaining fixing security.
Solution Approach 2:
The housing groove for the wiring member is formed in advance during the molding of the door resin component. This preliminary action eliminates the need for subsequent fixing operations, simplifying the assembly process while ensuring secure holding of the wiring member.
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 reduces the number of holes required, enhances water sealing and sound insulation, allows for weight savings, and maintains the wiring's integrity by absorbing thermal expansion differences, while keeping the wiring securely housed.
Implementation Method 1
a hot-melt crush part preventing the electrical wiring in the wiring member housing groove from coming out of the wiring member housing groove is formed in an opening part of the wiring member housing groove
Data Source
AI summary
A wiring member integrated door resin component includes a built-in component (for example, a door resin component) and a wiring member. The built-in component is a component having a wiring member housing groove in one main surface and incorporated into a box-like member to partition an inner side and outer side of the box-like member. The wiring member is held by the built-in component in a state where at least a part thereof in an extension direction is housed in the wiring member housing groove.