Projector Shutter Arc Motion Prevents Mechanical Interference
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Solution Overview
Problem
Existing projectors face design constraints due to mechanical interference between shutters and remote control light receiving sections, limiting the degree of freedom in projector design and operation.
Innovation Solution
A projector design featuring a shutter with an engagement structure comprising a protrusion and groove system that allows the shutter to move away from the front section, preventing interference with remote control light receiving sections, while also enhancing operability and appearance by forming a bulging section that fits loosely into the image opening section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shutter moves linearly along the rear surface of the front section, then the image opening section can be opened and closed, but the shutter interferes mechanically with members disposed on the rear surface of the front section
Solution Approach 1:
The shutter movement is changed from linear motion along the rear surface to arc-shaped motion along the circumference of a virtual cylinder. This dimensional change in the movement trajectory allows the shutter to clear members disposed on the rear surface of the front section while still achieving the function of opening and closing the image opening section.
Solution Approach 2:
The shutter is divided into multiple sections (first shutter section and second shutter section) that can move independently along different arc trajectories. This segmentation allows each section to navigate around obstacles on the rear surface while maintaining overall shutter functionality.
2Device complexity
If the shutter is positioned close to the front section in the open position, then the structure is compact, but the edge of the image opening section becomes visible and appearance is degraded
Solution Approach 1:
The shutter moves along an arc trajectory that extends in the depth direction rather than remaining in a single plane. This allows the shutter to achieve a retracted position that hides the image opening edge while maintaining structural compactness through the cylindrical arrangement.
Solution Approach 2:
The shutter is designed to automatically assume an optimal position that conceals the image opening edge when in the open state, through its predetermined arc-shaped trajectory. This preliminary positioning action ensures aesthetic appearance is maintained without requiring additional adjustment mechanisms.
Data Source
AI summary
A projector includes: a projection optical device; an exterior housing; a shutter; and a support member, the shutter and support member are provided with an engagement structure including an engagement protrusion which being provided on either one of them, protrudes along a vertical axis, and an engagement groove which being provided on the other, and extending in a direction in which the shutter moves, guides a movement of the engagement protrusion by the engagement protrusion being inserted therein, and the engagement groove is provided in such a way that a start end at which the engagement protrusion is positioned in the closed position is positioned to the projection optical device projection side of a finish end at which the engagement protrusion is positioned in the open position.