Vehicle Switch Harness Fixing via Curved Guide Portion
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Solution Overview
Problem
Existing switch devices for vehicles require complex and time-consuming fixing processes using binding bands, which can lead to positional deviations and instability during handling and installation due to the need for extensive winding and potential dislodgment of the harness portion.
Innovation Solution
A switch device with a concave curve-shaped guide portion and a V-shaped support on the holding body, allowing the binding band to be easily wound and securely fastened, reducing the need for extensive winding and enhancing positional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a binding band is used to fix the harness portion to the holding body, then the harness portion can be secured to a predetermined position, but the fixing process becomes complex and time-consuming requiring extensive winding
Solution Approach 1:
The guide portion is pre-formed with a concave curve shape that directs the binding band along the optimal winding path. This preliminary structural preparation eliminates the need for complex manual positioning and winding operations, reducing fixing time while ensuring reliable attachment
Solution Approach 2:
The guide portion acts as an intermediary element between the binding band and the holding body. It mediates the interaction by providing a predefined curved path that guides the binding band during winding, simplifying the fixing process while maintaining secure attachment
2Stability of the object's composition
If the binding band is wound extensively to secure the harness portion, then positional stability is achieved, but the harness portion may become dislodged during handling and installation
Solution Approach 1:
The guide portion is formed with a concave curve shape that provides a natural winding path for the binding band. This curvature creates a more secure attachment geometry compared to linear or flat surfaces, preventing dislodgment while reducing the need for extensive winding
Solution Approach 2:
The guide portion's concave curve shape creates an asymmetric winding path that prevents the binding band from slipping or dislodging. The asymmetric geometry ensures that the winding direction is controlled and the attachment is secure in both handling and installation conditions
3Ease of operation
If the guide portion is formed with a concave curve shape, then the binding band can be easily wound with reduced winding extent, but the manufacturing complexity of the case increases
Solution Approach 1:
The guide portion is integrated directly into the case structure as a unified component rather than being a separate part. This merging of functions reduces the overall number of components and simplifies manufacturing, while still providing the beneficial concave curve shape for easy binding band winding
Data Source
AI summary
A switch device includes a box-shaped case, a harness portion, and a fixing member. The harness portion is connected to a switch contact point and includes a plurality of lead lines extending out of the case. The case includes a holding body and a guide portion. The holding body includes a fixing portion protruding from an outer face of the case and provided on a tip side, and a through-hole provided under the fixing portion. The guide portion is opposed to the through-hole and formed in a substantially concave curve shape. The guide portion is formed such that an end portion further from the through-hole is positioned to be above an end portion closer to the through-hole. The fixing member extends through the through-hole and fixes the harness portion to the holding body by winding the harness portion and the fixing portion together.