Vehicle Sun Visor Arcuate Contact Prevents Spring Deformation
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Solution Overview
Problem
Conventional vehicle sun visors experience conduction failure and resistance instability due to interference between the columnar conductor end portions and the plate-shaped spring portions of the terminals during assembly, leading to potential deformation of the spring portions.
Innovation Solution
The vehicle sun visor design features arcuate-plate shape contact parts on the cylindrical-end portion of a non-conductive arm, with a gap and recesses to prevent interference, along with a spring-portion-displacing protrusion and guide portions to ensure proper alignment and prevent deformation of the spring portions during connector assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connector is forcibly assembled to the mounting bracket in the interference state, then the assembly can be completed, but the plate-shaped spring portion may be deformed by the columnar conductor end portion, causing conduction failure and resistance instability
Solution Approach 1:
A guide portion is introduced as an intermediary structure between the connector and mounting bracket. The guide portion includes a guide hole that receives the columnar conductor end portion, and a spring portion guide hole that guides the plate-shaped spring portion, preventing interference during assembly while ensuring proper alignment and contact between electrical components
Solution Approach 2:
The guide portion is pre-formed on the mounting bracket with predetermined positions and dimensions. The guide hole and spring portion guide hole are designed in advance to match the dimensions of the columnar conductor end portion and plate-shaped spring portion, respectively, ensuring that when the connector is assembled, the components are already positioned correctly without interference
Data Source
AI summary
A vehicle sun visor has a sun visor body including an electrical component, a non-conductive arm including a cylindrical-end portion on which contact parts of a pair of conductor are arranged and rotatably holding the sun visor body, a mounting bracket configured to mount the non-conductive arm to a vehicle, and a connector detachably attached to the mounting bracket and including a pair of terminals each having a contact portion to contact with a corresponding contact part of the pair of conductors and configured to supply electric power. The mounting bracket includes an arm-supporting portion rotatably supporting a cylindrical-end-portion side of the non-conductive arm. The contact parts of the pair of conductors are formed in an arcuate-plate shape. The contact parts in arcuate-plate shape are arranged via a gap on an outer peripheral surface of the cylindrical-end portion exposed outside the arm-supporting portion of the non-conductive arm.