Vehicle Door Mirror Vibration Suppression Arm Integration
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Solution Overview
Problem
Existing vehicle door mirror designs require separate operations and increased production costs due to the need for a reinforcing plate to suppress vibrations, which can lead to decreased vibration suppression effectiveness if fastening points become loose.
Innovation Solution
Integrating a vibration suppression arm part with the electric retraction unit's constituent member, where the arm extends away from housing fastening parts and forms one fastening point at its tip, eliminating the need for additional vibration-suppressing components, enhancing mounting ease and reducing costs while effectively attenuating vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate reinforcing plate is mounted on the mirror housing to suppress vibrations, then vibration suppression effectiveness is improved, but device complexity and production cost increase due to additional components and mounting operations
Solution Approach 1:
The patent combines the vibration suppression function with the electric retraction unit by integrating a vibration suppression arm into the unit constituent member. This merging eliminates the need for a separate reinforcing plate while maintaining vibration suppression effectiveness, as the integrated arm extends from the electric retraction unit to provide structural reinforcement and dampen vibrations directly at the source.
Solution Approach 2:
The unit constituent member of the electric retraction unit is given multiple functions: it serves both as the actuation mechanism for mirror retraction and as the base for the vibration suppression arm. This multi-functionality reduces the total component count while ensuring that the vibration suppression system is built-in rather than additive.
2Reliability
If a separate reinforcing plate is mounted on the mirror housing, then vibration suppression is achieved, but ease of manufacture deteriorates due to additional mounting operations
Solution Approach 1:
By integrating the vibration suppression arm directly into the unit constituent member of the electric retraction unit, the patent eliminates the separate mounting operation required for a reinforcing plate. The vibration suppression function is built-in during the manufacturing of the electric retraction unit itself, simplifying the overall assembly process and improving ease of manufacture.
3Reliability
If a separate reinforcing plate is used, then vibration suppression is achieved, but production cost increases due to additional components and operations
Solution Approach 1:
The patent eliminates the need for a separate reinforcing plate by integrating the vibration suppression arm into the electric retraction unit. This reduces the total bill of materials and eliminates additional purchasing, inventory management, and assembly costs associated with separate components, thereby reducing overall production cost while maintaining vibration suppression effectiveness.
Data Source
AI summary
In a vehicle door mirror, an electric retraction unit is disposed between a mirror housing and a shaft pivotably supporting a base end part of the mirror housing, and at least three housing fastening parts are fastened to the mirror housing and provided integrally with a unit constituent member forming part of the electric retraction unit. A vibration suppression arm part is provided integrally with the unit constituent member and extends in a direction that goes away from at least two of the at least three housing fastening parts. A remaining one housing fastening part of the at least three housing fastening parts is formed in a tip end part of the vibration suppression arm part. Accordingly, the vehicle door mirror can give an effective vibration suppression effect while enhancing the workability and suppressing any increase in the cost.