Vehicle Sun Visor Terminal Contact Design
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Solution Overview
Problem
Conventional vehicle sun visors experience conduction failures and illumination flickering due to interference between the spring terminals and conductor contacts, leading to potential deformation and unreliable power supply to the sun visor's illumination lamp.
Innovation Solution
The vehicle sun visor design incorporates arcuate-plate shaped contact parts on the conductors and a terminal-fixing portion in the connector housing, along with a terminal-support portion to apply load to the spring terminals, preventing deformation and ensuring stable contact during assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the plate-shaped spring portion is used as a contact part of the terminal, then the terminal can be easily assembled to the mounting bracket, but the spring portion may be deformed due to interference with the columnar conductor end portion during assembly
Solution Approach 1:
The patent applies preliminary action by pre-appling a load to the plate-shaped spring portion before assembly, causing it to protrude in advance. This ensures that the spring portion is already in a contact-ready state before the connector is assembled to the mounting bracket, preventing deformation during assembly while maintaining ease of assembly.
2Device complexity
If the plate-shaped spring portion has a free end at its distal end, then the terminal structure is simple, but the required contact load cannot be obtained and contact may be lost due to vibrations
Solution Approach 1:
The patent applies preliminary action by pre-appling a load to the plate-shaped spring portion, causing it to protrude from the terminal body before assembly. This preliminary protrusion ensures that when the terminal contacts the conductor, the required contact load is already present, preventing contact loss due to vibrations while maintaining simple terminal structure.
3Reliability
If the columnar conductor end portion contacts the spring portion during assembly, then electrical connection can be established, but the spring portion deforms due to interference
Solution Approach 1:
The patent applies preliminary action by pre-appling a load to the plate-shaped spring portion, causing it to protrude in advance. This ensures that the spring portion achieves its contact position before assembly, allowing electrical connection to be established without the columnar conductor end portion interfering with and deforming the spring portion during the assembly process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design prevents deformation of the spring terminals, maintains consistent contact, and eliminates flickering of the illumination lamp by ensuring proper alignment and load application, ensuring reliable power supply and stable lighting.
Implementation Method 1
a terminal-fixing portion configured to fix a base portion of each contact portion of the pair of terminals is provided in a housing of the connector
Implementation Method 2
a terminal-support portion for supporting a free end of each contact portion is provided... When the pair of terminals is assembled to the connector, the terminal-support portion of the housing may support the free end of each contact portion of the pair of terminals with a load applied in advance
Data Source
AI summary
A vehicle sun visor has a sun-visor body including an illumination lamp, a non-conductive arm including a cylindrical-end portion with contact parts of a pair of conductors rotatably holding the sun visor body, a mounting bracket for mounting the 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. An arm-supporting portion of the mounting bracket rotatably supports a cylindrical-end-portion side of the arm. The contact parts of the pair of conductors are in arcuate-plate shape and provided with a cutout on an outer-peripheral surface of the cylindrical-end portion exposed outside the arm-supporting portion. A terminal-fixing portion provided in a housing of the connector fix a base portion of each contact portion, and a terminal-support portion supports a free end of each contact portion.