Overlapping Blade Shutter Mechanism for Compact Projector Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projectors require additional space for retracting shutters, leading to increased size due to the need for a dedicated space for the shutter mechanism, which complicates manufacturing and combination accuracy.
Innovation Solution
A projector design featuring overlapping blade members that move in the same direction using frictional resistance, eliminating the need for engaging sections and simplifying the configuration, with a movement regulating section to control blade movement and reduce retraction space, allowing for a more compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tabular shutter is used to close the opening section, then the projection optical device can be protected, but a retraction space must be provided in the armor housing, increasing the projector size
Solution Approach 1:
The first blade and second blade are arranged to overlap each other in a nested configuration, with the second blade positioned within the spatial envelope of the first blade when both are in the closed position. This nesting allows both blades to occupy minimal retraction space while maintaining their protective function, thereby reducing the overall projector size without compromising the protection of the projection optical device
2Ease of operation
If projecting sections and engaging sections are provided in blade members to move them in the same direction, then the blades can be combined, but accurate manufacturing and combination are required, increasing device complexity
Solution Approach 1:
The patent replaces the traditional mechanical engaging section system with a friction-based coupling mechanism. The second blade utilizes frictional resistance generated by its contact with the first blade during movement to be driven in the same direction, eliminating the need for complex projecting and engaging sections. This substitution simplifies the blade member structure and reduces manufacturing and combination accuracy requirements while maintaining coordinated blade movement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the projector's size by eliminating the need for separate engaging structures and simplifying manufacturing and assembly, while ensuring effective opening and closing of the shutter mechanism, enhancing operational efficiency and accuracy.
Implementation Method 1
the second blade is moved in the same direction as the first blade by frictional resistance with the first blade
Data Source
AI summary
A projector includes an armor housing including an opening section through which an image is transmitted and a shutter device configured to open and close the opening section. The shutter device includes a blade member, a moving section configured to move the blade member, and movement regulating sections configured to regulate the movement of the blade member. The blade member includes first blades and second blades arranged to overlap each other and configured to move in the same direction each other to close and open the opening section. The second blades are moved in the same direction as the first blades by frictional resistance with the first blades. The movement regulating sections include second-blade regulating sections configured to come into contact with the second blades moved in the closing direction to predetermined positions and regulate further movement of the second blades in the closing direction.