Lens Mounting Mechanism for Vehicle Camera Modules
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Solution Overview
Problem
Existing image pickup devices face challenges in precisely mounting image pickup lenses while maintaining airtightness, leading to position deviations due to cumulative tolerance errors in component assembly.
Innovation Solution
A lens mounting mechanism with a lens holder and case featuring an insertion part and regulation part, along with engaging parts that allow for adjustable positioning and bonding with an adhesive member to ensure precise alignment and airtight sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lens seals an aperture of a waterproof case using an O-ring, then airtightness is ensured, but position deviation occurs due to cumulative tolerance errors in component assembly
Solution Approach 1:
A positioning pin is introduced as an intermediary component between the lens holder and the waterproof case. The positioning pin fits into a positioning hole to provide precise location reference, while the O-ring remains as a separate sealing element. This mediator component absorbs the tolerance accumulation and prevents it from affecting the final positioning accuracy of the lens.
Solution Approach 2:
The sealing and positioning functions are segmented into separate components: the O-ring handles the airtight sealing function, while the positioning pin handles the precise positioning function. This separation allows each component to be optimized independently - the O-ring for sealing reliability and the positioning pin for manufacturing precision.
2Adaptability or versatility
If wide plane glass is used to ensure a wide angle of incidence, then a wide angle of view is achieved, but downsizing becomes difficult
Solution Approach 1:
The patent replaces the conventional wide plane glass with a curved transparent surface (spheroidal or aspherical). This curved surface allows light rays from wider angles to be refracted and directed toward the image sensor, achieving a wide angle of view without requiring a large aperture opening. The curvature enables compact device sizing while maintaining wide-angle performance.
Data Source
AI summary
A camera module system for a vehicle, an image pickup device, and a method. The camera module system including a lens holder, a case, a first engaging part, and a second engaging part. The lens holder is configured to mount a lens, the lens holder having a first surface that is perpendicular to an optical axis of the lens. The case is configured to mount the lens holder, the case having a second surface that faces the first surface. The first engaging part is on the first surface, the first engaging part including a plurality of first projections. The second engaging part is on the second surface, the second engaging part including a plurality of second projections. The first engaging part is engaged with the second engaging part when the plurality of first projections is engaged with the plurality of second projections.