Rear View Mirror Mounting Device Six-Point Support
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Solution Overview
Problem
Existing fastening devices for interior rearview mirrors in vehicles suffer from low rigidity and static overdetermination, leading to mirror glass vibrations during dynamic driving due to elastic design and uneven support distribution.
Innovation Solution
A six-point support system with triangular prismatic guides and recessed grooves provides a statically defined and rigid connection between the receiving part and the mirror base, combined with a bayonet-like retaining device for easy installation and self-centering, preventing twisting during adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the side edges of the V-shaped receiving grooves are kept relatively thin to enable elastic springing open during installation, then the ease of operation is improved, but the rigidity of the connection is reduced leading to mirror glass vibrations
Solution Approach 1:
The connection system is divided into two independent functional parts: a six-point support structure that provides rigid positioning and a separate bayonet-like retaining device that provides secure mechanical fastening. This segmentation allows each component to optimize its function without compromise - the support points provide high rigidity while the retaining device provides easy installation and removal.
Solution Approach 2:
The bayonet-like retaining device incorporates a rotational locking mechanism that transitions from an insertion phase to a locked phase. The mirror base is inserted vertically and then rotated to engage the retaining feature, creating a dynamically adjustable connection that is both easy to install and highly rigid when locked.
2Strength
If a six-point support system is used to create a statically precisely defined connection, then the rigidity is improved, but the device becomes statically overdetermined leading to manufacturing tolerance issues
Solution Approach 1:
The bayonet-like retaining device introduces a degree of freedom through rotational movement that allows the connection to adapt to manufacturing tolerances. The rotation mechanism acts as a tolerance compensation feature, enabling the statically defined six-point support to function effectively despite minor dimensional variations in mass production.
3Manufacturing precision
If all contact surfaces of the mirror base are spatially aligned at the same height, then the manufacturing precision is improved, but the ability to absorb lateral forces is reduced due to static overdetermination
Solution Approach 1:
The rotational locking mechanism of the bayonet-like retaining device provides dynamic adaptability that allows the connection to absorb lateral forces. During rotation and in the locked position, the mechanism can accommodate lateral loads through its mechanical geometry, compensating for the rigid alignment of the six support points.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The fastening device (1) has a holding portion (5) held in position by the adhesive bonding provided in the windshield. A mirror foot (6) of the internal rear view mirror (2), is fastened to the holding portion. The mirror foot is supported directly on the holding portion by a six-point support and fastened to the holding portion using a separate retaining device.