Projector Base Plate Fixing for Lens Stability
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Solution Overview
Problem
Large lenses in projector apparatuses experience bending due to their mass, and the limited space restricts the number of fixing locations, making it difficult to attach and replace parts of the lens shifting unit effectively.
Innovation Solution
A projector apparatus with a base plate and a lens supporting unit that includes guiding mechanisms for movement in X, Y, and Z axes, and fixing devices at both the peripheral edge and inner side of the base plate to securely attach the lens shifting unit to the projector body, reducing bending and facilitating part replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the number of fixing locations is increased to reduce base plate bending, then the bending of the base plate is reduced, but the available space for attaching fasteners is limited
Solution Approach 1:
The fixing devices are divided into two distinct groups: first fixing devices positioned at the peripheral edge of the base plate and second fixing devices positioned on the inner side. This segmentation allows the patent to utilize different spatial zones of the base plate, effectively increasing the number of fixing locations without requiring additional external space.
2Stability of the object's composition
If fasteners are positioned at fixed locations on the base plate, then the base plate can be securely attached, but the fasteners become hidden by lens shifting unit components when moved from home position, making part replacement difficult
Solution Approach 1:
The patent positions the first fixing devices at the peripheral edge of the base plate, which remains accessible even when the lens shifting unit moves from its home position. This dynamic positioning ensures that fasteners remain accessible for tool manipulation throughout the full range of motion, enabling easy part replacement while maintaining secure attachment.
Data Source
AI summary
A projector apparatus that can effectively reduce bending of a base plate supporting a lens shifting unit thereon and facilitates replacement of unit parts in the event of a failure is provided. The projector apparatus includes: a base plate attached inside a projector body; a lens supporting unit attached to the base plate and supporting a projection lens so as to be movable relative to the base plate; guiding mechanisms for guiding the lens supporting unit so as to be freely movable in a horizontal direction and a normal direction relative to the base plate; and fixing devices which fix the base plate to the projector body. The fixing devices include a plurality of first fixing devices provided at a peripheral edge of the base plate, and second fixing devices provided on an inner side of the plurality of first fixing devices.