Buckle Boot Restriction Portion Wire Harness
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Solution Overview
Problem
Existing buckle devices require additional assembly processes to restrict wire harness movement and may suffer from reduced durability due to boot bending during webbing fastening and unfastening.
Innovation Solution
A buckle device design that incorporates a boot with a restriction portion to prevent wire harness movement in the width direction, allowing the wire harness to be disposed inside the boot without the need for tape winding, and features distinct bend origin portions to manage boot bending, thereby reducing assembly complexity and maintaining durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an outside tape is used to fix the wire harness to the anchor plate, then the wire harness movement is restricted, but the number of assembly processes increases
Solution Approach 1:
The patent combines the wire harness fixation function with the boot structure by integrating a fixation portion directly into the boot. This merges two separate components (boot and fixation mechanism) into one unified structure, eliminating the need for separate tape winding processes while maintaining reliable wire harness restriction.
Solution Approach 2:
The boot structure provides self-fixation capability through its integrated fixation portion that engages with the anchor plate. The wire harness is automatically restricted by the boot's own structure without requiring external tapes or additional fastening components, making the system self-sufficient.
2Ease of operation
If the boot covers the coupling member during fastening and unfastening operations, then the coupling is protected, but the boot may bend and durability is reduced
Solution Approach 1:
The patent divides the boot into functionally distinct segments: a covering portion that protects the coupling member during operations, and a fixation portion that anchors the boot to the vehicle seat. This segmentation allows the covering portion to flex during fastening/unfastening while the fixation portion remains stationary, distributing mechanical stress and improving overall durability.
Solution Approach 2:
The boot exhibits local quality differences with varying thickness and rigidity in different regions. The covering portion has appropriate flexibility for protection during movement, while the fixation portion has enhanced structural properties for stable anchoring. This localized differentiation optimizes both operational ease and bending durability.
Data Source
AI summary
A buckle device includes: a buckle body that retains a tongue through which a webbing worn across an occupant is inserted; a fixing plate that is fixed to a vehicle seat; a wire harness that is connected to the buckle body; and a coupling webbing that is formed in a belt shape and that couples the buckle body and the fixing plate together. The buckle device further includes a boot that covers the coupling webbing in a state in which a part of the wire harness is disposed inside the boot, and that includes a projection shaped portion that restricts movement of the wire harness in the width direction of the coupling webbing.