Resin Vehicle Door Mirror Base with Linking Part
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Resin-based vehicle door mirrors with slits for cord insertion suffer from reduced stiffness and potential deformation, leading to weakened strength against external forces and twisting during molding.
Innovation Solution
A vehicle door mirror design featuring a resin base member with a slit that includes a linking part projecting downward to maintain stiffness and prevent deformation, along with a restricting projection on the shaft to prevent cord damage during pivoting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a slit is formed in the resin base member for cord insertion, then the ease of operation is improved by simplifying cord insertion, but the stiffness and strength of the base member are degraded
Solution Approach 1:
The base member is segmented by forming a slit that separates the insertion hole into two distinct openings, allowing the cord to be inserted more easily through the separated openings rather than through a single circular hole
Solution Approach 2:
The linking part is strategically positioned only at specific locations (front and rear ends) of the slit rather than continuously across the entire slit, providing localized reinforcement where it is most needed to maintain stiffness while allowing the rest of the slit to facilitate cord insertion
2Ease of operation
If a slit is formed in the resin base member, then the ease of operation is improved for cord insertion, but deformation such as twisting occurs during molding
Solution Approach 1:
The linking part provides localized reinforcement at critical positions (front and rear ends of the slit) to prevent deformation during molding, while maintaining the overall slit structure for cord insertion functionality
3Weight of moving object
If the base member is made of resin to reduce weight, then the weight of the moving object is reduced, but the stiffness and strength are insufficient compared to metal materials
Solution Approach 1:
The linking part is strategically positioned at the front and rear ends of the slit where reinforcement is most needed, providing localized strength enhancement in the resin base member without adding excessive weight throughout the entire structure
Solution Approach 2:
The base member combines resin material with the linking part structure, creating a composite construction that leverages the weight advantages of resin while incorporating structural features that enhance strength and stiffness
Data Source
AI summary
A vehicle door mirror includes a mirror housing accommodating an electrical component therein, a base member made from a resin, and a shaft having a cord through hole through which a cord that is to be connected to the electrical component is inserted, the shaft being standingly provided on the base member so as to pivotably support a base end portion of the mirror housing. The base member has a slit formed therein. The slit has an outer end opening on a side edge of the base member so that the cord guided out from the cord through hole toward the base member side can be inserted through the slit. A linking part that links paired mutually opposing side faces of the slit together via an inner end part of the slit is formed on the base member so as to have a shape protruding downward.