Door Mirror Attachment Structure for Compact Design and Noise Reduction
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Solution Overview
Problem
Existing door mirror attachment structures are not optimized for minimal size, leading to potential interference and assembly issues, as well as wind noise and aesthetic quality concerns.
Innovation Solution
A door mirror device with a first cover and a second cover that include abutting and engagement portions to restrict movement in specific directions, along with a closing portion and projection portions to minimize size and wind noise, and an elastic suppression portion to prevent chattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional attachment structure with engagement claws and reference pins is used, then the visor and underpanel can be fixed together, but the attachment structure becomes large in size
Solution Approach 1:
The attachment structure is divided into two functional sections: a first attachment section with abutting portions for restricting plate thickness direction movement, and a second attachment section with engagement portions for stopping in-plane direction movement. This segmentation allows each section to be optimized independently, reducing overall size while maintaining reliability
Solution Approach 2:
The abutting portions extend along the in-plane direction rather than projecting in the plate thickness direction, utilizing the in-plane dimension to achieve restriction functionality. This dimensional reorientation reduces the projection amount in the plate thickness direction, making the attachment structure more compact
2Reliability
If the abutting portion and engagement portion project out in the plate thickness direction, then movement restriction is effective, but the attachment structure becomes larger
Solution Approach 1:
The abutting portions are configured to extend along the in-plane direction of the casing rather than projecting in the plate thickness direction. This dimensional change allows movement restriction to be achieved while minimizing projection, directly resolving the contradiction between effectiveness and size
3Ease of manufacture
If there is a gap between the first cover and second cover, then assembly is easier, but wind noise increases and aesthetic quality deteriorates
Solution Approach 1:
A closing portion is provided that closes the gap between the first cover and second cover. The closing portion can be made of flexible material that allows for assembly tolerance while providing a continuous outer surface that prevents wind noise and improves aesthetics
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
The solution allows for a compact attachment structure, improved assembly ease, reduced wind noise, and enhanced aesthetic quality by restricting movement and using elastic forces to suppress noise and interference.
Implementation Method 1
an attachment body that is attached to at least one of the first cover or the second cover, and that is provided with an elastic body; and a suppression portion that is provided at one of the first cover or the second cover, and that is abutted by the elastic body
Data Source
AI summary
A door mirror includes a first attachment section in which an abutting portion is provided at a plating visor so as to extend along a vehicle up-down direction, and in which a restricting portion that abuts the abutting portion is provided at a visor cover; and a second attachment section in which an engagement portion is provided at the plating visor so as to extend along the vehicle up-down direction, and in which a catch portion that engages with the engagement portion is provided at the visor cover.