Cable Guide Attachment With Asymmetric Wrong Assembly Prevention
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Solution Overview
Problem
Existing cable guide attachment structures for vehicles with bilaterally symmetrical sliding doors often result in incorrect vertical orientation, leading to misalignment between the cable guide's bending deformation and the sliding door's opening path, especially when attached on both sides of the vehicle.
Innovation Solution
A cable guide attachment structure featuring a fixing bracket with a projecting portion and a receding portion at reversed positions on the left and right sides, ensuring the cable guide is attached in a right-side up orientation by preventing incorrect assembly through a fitting mechanism that only allows correct vertical alignment, utilizing a combination of link members with fitting protrusions and recessions to restrict pivot amounts and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cable guide is attached using a conventional symmetric fixing bracket on both left and right sides, then the attachment process is simple and quick, but the cable guide may be attached in incorrect vertical orientation leading to misalignment with the sliding door path
Solution Approach 1:
The fixing bracket is designed with asymmetric wrong assembly prevention portions including a projecting portion and a receding portion at reversed positions. This asymmetric configuration ensures that the cable guide can only be attached in the correct vertical orientation, as the projecting portion of one bracket corresponds to the receding portion of the other bracket only when properly oriented. This resolves the contradiction by maintaining simple attachment procedures while ensuring precise vertical orientation through inherent asymmetric geometric constraints.
2Device complexity
If the cable guide is attached without orientation prevention features, then the attachment structure is simple and cost-effective, but installation errors occur due to incorrect vertical orientation
Solution Approach 1:
The fixing bracket incorporates asymmetric wrong assembly prevention portions with projecting and receding portions positioned differently on left and right brackets. This asymmetric design passively prevents incorrect installation through geometric incompatibility, ensuring that the cable guide can only be attached in the correct vertical orientation. The solution maintains relatively simple attachment structure while significantly improving installation correctness through the inherent asymmetric constraints.
3Ease of manufacture
If the cable guide uses a symmetric attachment design on both sides of the vehicle, then the design is consistent and easy to manufacture, but it cannot prevent vertical orientation mistakes during installation
Solution Approach 1:
While maintaining overall design consistency for ease of manufacture, the fixing bracket incorporates asymmetric wrong assembly prevention portions where the projecting and receding portions are positioned at reversed locations on left and right brackets. This asymmetric feature does not complicate the manufacturing process significantly but effectively prevents vertical orientation mistakes during installation, as the asymmetric geometry inherently guides correct assembly orientation.
Data Source
AI summary
A cable guide attachment structure that enables a cable guide to be attached in a right-side up manner on both the left and right sides of a vehicle. The attachment structure includes a cable guide into which a wire harness is inserted, a fixing bracket for holding an end portion of the cable guide and being fixed to a body, and wrong assembly prevention portions that include a projecting portion provided on the end portion of the cable guide and a receding portion provided in the fixing bracket. The wrong assembly prevention portions are provided at reversed positions between the cases where the fixing bracket is fixed on the left and right sides of the body. The projecting portion fits into the receding portion if the cable guide is right-side up, and the projecting portion does not fit into the receding portion if the cable guide is upside down.