Wire Harness Protector Lid Structure for Rattle Suppression
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Solution Overview
Problem
Conventional wire harness protectors experience rattling and separation of lids due to force applied in directions intersecting the length of the tubular portion, leading to potential deviation of the electric wire path and contact with nearby components.
Innovation Solution
A protector design with a base, first lid slidably engaged in the length direction and a second lid fitted in a direction intersecting the length, preventing sliding of the first lid and maintaining the electric wire path by using rail and fitting portions to secure the lids in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lid is configured with a fitting portion fitted to a fitted portion by being moved in a direction intersecting the length direction of the tubular portion, then the assembly is simple, but rattling occurs easily in the direction in which the fitting portion is moved
Solution Approach 1:
The lid is divided into a first lid and a second lid. The first lid includes a fitting portion that fits to the base, while the second lid includes a slide that prevents rattling of the first lid. This segmentation allows each component to have a specialized function, resolving the contradiction between simple assembly and stable connection.
Solution Approach 2:
The second lid acts as an intermediary component between the first lid and the base. It includes a slide that fits to a rail on the base, preventing the first lid from rattling while maintaining the simple fitting structure of the first lid to the base.
2Length of moving object
If the tubular portion is long and the fitting portion is provided on a partial lengthwise portion, then the protector can cover more wire, but the end portion of the lid may largely move away from the base portion
Solution Approach 1:
The lid is segmented into first and second lids, with the second lid positioned at a location shifted from the first lid in the length direction. This segmentation ensures that even when the tubular portion is long, the second lid provides additional anchoring to prevent the first lid from separating from the base.
Solution Approach 2:
The connection mechanism is extended in the length direction by adding the second lid. The slide of the second lid fits to a rail that extends along the length direction of the base, providing stability along the longitudinal axis rather than only at a single fitting point.
3Ease of operation
If the first lid is freely movable to allow wire installation, then the wire can be easily inserted, but the lid may separate from the base under external force
Solution Approach 1:
The first lid is designed to be movable during assembly for easy wire installation, but the second lid with the slide-rail mechanism provides dynamic constraint that prevents separation under external force. The system transitions from a static rigid connection to a dynamic system that allows controlled movement while preventing harmful separation.
Data Source
AI summary
A protector that includes a tube configured to cover an electric wire, wherein the tube includes: a base configured to extend partially around the electric wire in a circumferential direction; a first lid configured to be combined with the base to extend entirely around the electric wire in the circumferential direction; and a second lid provided at a position shifted from the first lid in a length direction of the tube, and configured to be combined with the base to extend entirely around the electric wire in the circumferential direction.