Vehicle Sun Visor Conductive Terminal Gap Design
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Solution Overview
Problem
Conventional vehicle sun visor connection structures experience a decrease in clamping force over time due to constant contact pressure, leading to potential short circuits and durability issues with conductive elements.
Innovation Solution
A vehicle sun visor design featuring a non-conductive support shaft with conductive elements and a divider that creates a gap to prevent excessive contact pressure, ensuring reliable energization and de-energization while preventing short circuits, and simplifying the structure by allowing the conductive elements to extend directly from the shaft end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminals are constantly in contact with the shaft end of the support shaft at a constant contact pressure, then the connection structure is simple, but the clamping force of the terminals against the conductive elements decreases due to long-term usage
Solution Approach 1:
A non-conductive shaft end portion is introduced as an intermediary element between the terminals and the conductive elements. This mediator allows the terminals to contact the shaft end at a constant pressure while preventing direct continuous contact with the conductive elements, thereby maintaining clamping force and preventing short circuits.
2Stability of the object's composition
If the terminals constantly contact the shaft end at constant pressure, then the structure is stable, but the durability of the terminals decreases due to loss of clamping force
Solution Approach 1:
The non-conductive shaft end portion serves as a mediator that enables stable constant pressure contact between terminals and the shaft, while preventing direct wear between terminals and conductive elements. This extends terminal durability by eliminating direct frictional contact.
Solution Approach 2:
The shaft end is segmented into a conductive element portion and a non-conductive shaft end portion. This segmentation allows different functional zones: one for electrical contact and another for mechanical support with constant pressure, thereby protecting the terminals from wear.
3Reliability
If the conductive elements are exposed on the sides of the support shaft, then the electrical connection is reliable, but the risk of short circuit increases
Solution Approach 1:
The non-conductive shaft end portion acts as an intermediary barrier that prevents direct contact between conductive elements when the support shaft rotates. This mediator maintains electrical connection reliability during operation while blocking short circuit paths.
Solution Approach 2:
The harmful conductive portion is extracted from the shaft end by making the shaft end non-conductive. This separates the electrical connection function from the mechanical support function, eliminating the short circuit risk while maintaining electrical connectivity through controlled contact.
Data Source
AI summary
A vehicle sun visor includes: a sun visor body; a support shaft that supports the sun visor body; a mounting bracket that attaches the support shaft to a vehicle; a pair of first conductive element and second conductive element that are provided at a shaft end of the support shaft adjacent to the mounting bracket and inside the support shaft; a divider that is interposed between first ends; and a pair of terminals that supply electric power to the first ends. A gap is formed between the divider and at least one of the first ends.