Projector Optical Mount Layout for Compact Position Adjustment
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Solution Overview
Problem
Existing projectors face an increase in size due to the configuration of the adjusting device that moves the projection optical device in a direction crossing its center axis, which is not optimized for size reduction.
Innovation Solution
A projector design that includes a holding member and a supporting member to move the projection optical device in a direction orthogonal to the incident light path, utilizing guide surfaces and contact surfaces that overlap the flange of the lens barrel to facilitate compact size without compromising functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the adjusting device shifts the projection optical device in a direction crossing the center axis to adjust the projection position, then the projection position can be adjusted, but the projector size increases in the crossing direction
Solution Approach 1:
The contact surfaces are positioned to overlap the flange when viewed from the emission side, utilizing the radial dimension of the flange to accommodate the contact surfaces. This dimensional arrangement allows the holding member to be positioned more compactly in the crossing direction while maintaining adjustment functionality, thereby reducing the overall projector size in the crossing direction without compromising projection position adjustment capability.
2Volume of moving object
If the contact surfaces are positioned to overlap the flange when viewed from the emission side, then the projector size is reduced, but the structural complexity increases
Solution Approach 1:
The contact surfaces are integrated directly into the holding member structure, and the flange is integrated into the lens barrel. By merging these components and positioning them to overlap, the patent eliminates the need for additional complex positioning mechanisms or intermediate structures, thereby reducing overall device complexity while achieving compact size.
3Stability of the object's composition
If the guide surfaces and contact surfaces are arranged to cross the incident direction, then the movement guidance is improved, but the device complexity increases
Solution Approach 1:
The guide surfaces on the supporting member and contact surfaces on the holding member serve multiple functions: they provide movement guidance in the crossing direction, define the relative positioning between components, and enable compact arrangement through overlapping. This multi-functionality eliminates the need for separate guidance and positioning mechanisms, reducing device complexity while improving movement guidance stability.
Data Source
AI summary
A projector includes a projection optical device configured to project image light and a moving device configured to move the projection optical device in a first direction crossing an incident direction of the image light on the projection optical device. The moving device includes a holding member configured to hold the projection optical device and a supporting member configured to support the holding member to be movable in the first direction. The projection optical device includes a lens barrel configured to hold a lens and a flange provided in the lens barrel and held by the holding member. The supporting member includes guide surfaces that guide the movement of the holding member in the first direction. The holding member includes contact surfaces that are in contact with the guide surfaces. The guide surfaces and the contact surfaces cross the incident direction.