Optical Unit Alignment Guide and Guided Parts
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Solution Overview
Problem
Existing optical units face challenges in aligning the optical axis of lenses with the center axial line of an imaging element, leading to potential deviations and a narrowed viewing angle due to production dimensional inaccuracies.
Innovation Solution
An optical unit design featuring a holder with a tube part and a base, where the holder's guided part is aligned with the base's guide part to coincide the optical axis with the center axial line, and a circuit board holding part allows for perpendicular adjustment and fixation, ensuring accurate alignment and reducing stress on lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the holder is screwed into the base using male and female screws, then the holder can be attached to the base, but the optical axis of the lenses may deviate from the center vertical line due to rattling between the screws
Solution Approach 1:
The patent introduces a guide part in the base and a guided part in the holder as intermediary elements that mediate the connection between the holder and base. The guided part fits into the guide part to establish precise coaxial alignment, while the male-female screw connection provides secure attachment. This intermediary alignment mechanism eliminates the rattling problem and ensures the optical axis coincides with the center vertical line.
2Manufacturing precision
If the positioning part dimensions are controlled to coincide the optical axis with the center vertical line, then alignment can be achieved, but dimensional accuracy issues during base production cause displacement
Solution Approach 1:
The patent implements preliminary action by providing the guide part and guided part structure before the actual attachment process. This pre-established guidance system ensures that when the holder is attached to the base, the optical axis automatically aligns with the center vertical line through the fitted guided part, eliminating the need to rely solely on precise dimensional control of positioning parts that are subject to production variations.
3Manufacturing precision
If a guide part and guided part structure is added to align the optical axis, then alignment accuracy improves, but the device complexity increases
Solution Approach 1:
The guide part and guided part structure serves multiple functions simultaneously: it provides coaxial alignment guidance, acts as a positioning mechanism, and works in conjunction with the screw connection for secure attachment. By integrating these functions into a unified structure, the patent achieves high alignment accuracy without proportionally increasing complexity, as the same structural elements perform multiple roles in the assembly process.
Data Source
AI summary
An optical unit is provided. In the optical unit, a holder holding part is provided with a guide part determining a first center axial line that is a reference and the tube part is provided with a guided part determining a second center axial line coincided with an optical axis of the lenses. A guided part is positioned by the guide part. A circuit board holding part is provided with a positioning part with which the circuit board is abutted and at least one of the circuit board holding part and the circuit board includes a fixed part through which the circuit board is fixed to the circuit board holding part so that a position of the circuit board to the circuit board holding part is capable of being adjusted in a direction perpendicular to the first center axial line.