Optical Device Frame Positioning via Limiting Protrusions
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Solution Overview
Problem
The assembly of high-resolution light-transmitting plate bodies in projection devices is hindered by the uneven inner surfaces of frame bodies, leading to precision issues and assembly inconvenience due to lower precision requirements for the frame bodies.
Innovation Solution
The optical device employs a bearing structure with a first frame body and a second frame body connected to each other, where the light-transmitting plate body is positioned through limiting protruding portions on the first inner surface, reducing the precision requirement for the frame body and facilitating easier assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the frame body positions the entire inner surface of the light-transmitting plate body, then the positioning coverage is complete, but the precision requirement for the frame body becomes too high and assembly becomes inconvenient
Solution Approach 1:
The patent divides the positioning function from the entire inner surface to specific localized features (limiting protruding portions and corresponding edges). This segmentation allows the frame body to maintain lower manufacturing precision while achieving accurate positioning through discrete reference points, resolving the contradiction between positioning precision and assembly convenience.
Solution Approach 2:
The limiting protruding portions and corresponding edges act as intermediary positioning elements between the frame body and light-transmitting plate body. These intermediaries provide precise localization without requiring the entire inner surface to be highly precise, thus improving assembly convenience while maintaining positioning accuracy.
2Ease of manufacture
If the frame body is designed with lower precision to reduce manufacturing costs, then manufacturing becomes easier and cheaper, but the inner surface becomes uneven causing assembly inconvenience
Solution Approach 1:
The patent segments the positioning function to specific localized features rather than requiring the entire inner surface to be precise. This allows the frame body to be manufactured with lower overall precision while maintaining accurate positioning at critical points, thus improving ease of manufacture without compromising assembly convenience.
Solution Approach 2:
The patent applies local quality by ensuring only the specific regions where limiting protruding portions and corresponding edges meet require high precision, while other areas of the frame body can have lower precision. This localized precision approach facilitates easier manufacturing while maintaining assembly convenience at critical interfaces.
Data Source
AI summary
An optical device including a bearing structure and a light-transmitting plate body is provided. The bearing structure includes a first frame body and a second frame body connected to each other, and the first frame body is located in the second frame body. The first frame body has at least one first inner surface, and the at least one first inner surface has at least one limiting protruding portion protruding from the at least one first inner surface. The light-transmitting plate body is disposed in the first frame body and is fixed to the first frame body. The light-transmitting plate body has at least one first edge, and the at least one first edge of the light-transmitting plate body is positioned through the at least one limiting protruding portion.