Door Wiring Cover Structure for Easier Harness Insertion
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Solution Overview
Problem
Existing door wire harness modules face challenges in simply forming a structure to hold wiring members due to the complexity of attaching wiring covers to grooves.
Innovation Solution
A door wiring module design featuring a service hole cover with a groove and a wiring cover, where a first and second attachment part are provided on both sides of the groove, allowing a temporary attachment state with a space between the second end portion and the second attachment part, enabling easy housing of wiring members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wiring cover is fully attached to both attachment parts before housing the wiring member, then the wiring member is securely held, but the wiring member cannot be easily inserted into the groove
Solution Approach 1:
The wiring cover is preliminarily attached to the first attachment part before the wiring member is inserted into the groove. This preliminary attachment provides initial support and positioning for the wiring cover, enabling easy insertion of the wiring member while the second attachment part remains unattached. After insertion, the wiring cover is then attached to the second attachment part to achieve secure holding.
Solution Approach 2:
The attachment process is segmented into two distinct stages: first attachment to the first attachment part, and second attachment to the second attachment part. This segmentation allows the wiring cover to be in different attachment states (partially attached during insertion, fully attached for secure holding), resolving the contradiction between ease of insertion and security of holding.
2Reliability
If a complex attachment structure is used to secure the wiring member, then the wiring member is reliably held, but the structure becomes complicated and difficult to manufacture
Solution Approach 1:
The wiring cover serves multiple functions: it covers the groove opening, provides attachment surfaces for both attachment parts, and acts as a retaining structure for the wiring member. The first and second attachment parts are integrated into the service hole cover, eliminating the need for separate fastening components. This multi-functionality achieves reliable wiring member holding while keeping the structure simple and easy to manufacture.
3Reliability
If the wiring cover is rigidly fixed at both ends, then the wiring member is securely held, but stress concentration occurs at the attachment points
Solution Approach 1:
The wiring cover is attached to the first attachment part in advance, creating a preliminary fixed state. During this state, the wiring member can be inserted into the groove. After insertion is complete, the wiring cover is then attached to the second attachment part. This sequential attachment allows for controlled stress distribution and prevents simultaneous stress concentration at both attachment points during the assembly process.
Data Source
AI summary
A door wiring module includes a service hole cover having a main surface with a groove, at least one wiring member housed in the groove, and a wiring cover covering an opening of the groove. A first attachment part and a second attachment part are provided on both sides of the groove in the main surface of the service hole cover. The service hole cover and the wiring cover are provided so that they can be in a free state where a space is formed between the second end portion and the second attachment part in a temporal attachment state where the first end portion of the wiring cover is attached to the first attachment part and the second end portion of the wiring cover is not attached to the second attachment part.