Vehicle Door Hole Cover Structure for Clip Detachment Access
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Solution Overview
Problem
The detachment of the door hole cover from the door inner panel is hindered by interference between the tool used for detachment and the retaining projections, making the process difficult and inefficient.
Innovation Solution
The door hole cover features a pair of guide walls and a protruded portion that create a space to house the clip, allowing the clip to be restricted from moving through the space, thus preventing interference with detachment tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retaining projections are provided at two opposite sides of the introduction groove to prevent the clip from falling off, then the clip is securely retained, but the tool used for detachment work interferes with the retaining projections, making detachment difficult
Solution Approach 1:
The introduction groove is segmented into multiple sections: a first introduction groove for clip insertion, and a second introduction groove for tool insertion. This segmentation allows the retaining projections to effectively secure the clip during attachment while providing a separate path for detachment tools, eliminating interference between the tool and retaining projections.
Solution Approach 2:
A ridge is introduced as an intermediary structure that connects the first and second introduction grooves. This ridge serves as a mediator that allows the retaining projections to perform their retention function while simultaneously providing a pathway for the detachment tool to access and engage with the clip without direct interference with the retaining projections.
2Productivity
If the introduction groove width is set wider than the clip shaft width to facilitate clip insertion, then attachment work efficiency is improved, but the space available for tool insertion during detachment is reduced
Solution Approach 1:
The introduction groove is divided into two distinct grooves: the first introduction groove with sufficient width for efficient clip insertion, and the second introduction groove specifically designed for tool insertion during detachment. This segmentation resolves the contradiction by providing optimized dimensions for each function without compromise.
Solution Approach 2:
Instead of increasing the width of a single groove, the solution introduces a new dimension by creating a second groove at a different position and orientation. This allows both wide clip insertion and tool access to be achieved through spatial differentiation rather than increasing dimensions of a single feature.
Data Source
AI summary
This invention improves work efficiency of a detachment work of detaching a door hole cover from a door inner panel. The door hole cover is to be attached to a door inner panel of a vehicle's door, the door hole cover including: recessed portions each allowing a clip to be housed therein, the clip being used to attach the door hole cover to the door inner panel; a pair of guide walls connected to an end portion of each recessed portion which end portion has an opening, the guide walls facing each other, the guide walls guiding the clip to an inside of the recessed portion; and a protruded portion protruding from one of the guide walls, at least part of a first one of the guide walls protruding, more than a second one of the guide walls, in a direction for narrowing a space between the guide walls.