Motor Vehicle Interior Mirror Transverse Actuation
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Solution Overview
Problem
Existing interior mirrors in vehicles face issues with displacement of the mirror position during actuation for dimming, leading to inconvenient adjustments and potential dazzling from rear headlights at night, and existing solutions either require complex electronics or are costly.
Innovation Solution
A switching device with two rotatably supported switching disks and actuation elements that convert lateral rotation into a tipping movement of the mirror element, allowing for smooth adjustment between day and night positions without longitudinal axis force application, ensuring accurate positioning and dust-sealed operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an actuation element is used to tip the prism mirror in the direction of the longitudinal vehicle axis, then the mirror element can be tipped between day and night positions, but the mirror position is simultaneously displaced and the desired image is no longer projected into the driver's field of view
Solution Approach 1:
The actuation direction is changed from the longitudinal vehicle axis direction to a transverse direction perpendicular to the longitudinal axis. This dimensional change allows the mirror element to be tipped without causing displacement in the viewing direction, thereby maintaining image projection accuracy in the driver's field of view while still enabling day/night position switching
2Object-affected harmful factors
If a prism mirror with different reflectivity surfaces is used, then dazzling from rear headlights is reduced during nighttime, but the device complexity increases due to the adjustment mechanism
Solution Approach 1:
The actuation direction is changed from longitudinal to transverse, simplifying the adjustment mechanism by eliminating the need for complex longitudinal movement control while still achieving the dimming function through perpendicular tipping motion
Solution Approach 2:
The mirror element's own geometry and the transverse actuation mechanism work together to automatically achieve the dimming effect without requiring additional complex control systems, electronic components, or multiple adjustment stages
3Ease of operation
If the actuation element is arranged in the central installation location, then the mirror element can be tipped, but simultaneous displacement of the mirror position occurs requiring re-adjustment
Solution Approach 1:
By actuating in the transverse direction rather than the longitudinal direction, the mirror element tips to change reflectivity while maintaining its position in the longitudinal axis, thus keeping the desired image projected into the driver's field of view without requiring re-adjustment
Data Source
AI summary
An interior minor for a motor vehicle, including a housing and a minor element held within it, can be tipped between a day position and a night position by means of at least one actuation element, where a direction of actuation of the at least one actuation element corresponds to a transverse direction of the interior minor in a central installation position.