Projection Apparatus Rotation Regulation Mechanism
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Solution Overview
Problem
Existing projection apparatuses that change projection direction using multiple rotation axes risk damaging the projection optical system due to potential collisions with obstacles, as the orientation of the projection lens can vary significantly with rotation.
Innovation Solution
A projection apparatus with a regulation mechanism that includes a moving member and a regulation releasing restriction unit, which regulates the rotation of first and second rotation members to prevent collisions by determining specific rotation states and moving the members to regulation positions when necessary, ensuring the projection direction can be changed variably while protecting the optical system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rotation axes are used to change projection direction, then the projection direction can be changed in various ways and convenience is improved, but the projection lens may hit an obstacle and be damaged
Solution Approach 1:
The regulation mechanism determines the rotation state of the first and second rotation members in advance before rotation occurs. When a specific rotation state is detected, the moving member is fixed at the regulation position beforehand to prevent the projection lens from hitting obstacles during subsequent rotation operations.
Solution Approach 2:
A moving member is introduced as an intermediary element between the rotation members and the projection lens. This moving member can be positioned at a regulation position to regulate rotation and prevent the projection lens from contacting obstacles, while also being movable to a regulation release position to allow free rotation when safe.
2Reliability
If a regulation mechanism is added to prevent rotation damage, then the projection optical system is protected, but the device complexity increases
Solution Approach 1:
The regulation mechanism is designed to automatically determine the rotation state of the rotation members and self-regulate by fixing or releasing the moving member based on the detected rotation state, without requiring external control systems or additional complex mechanisms.
Solution Approach 2:
The determination of rotation state and the regulation of rotation are combined into a single integrated regulation mechanism. The moving member serves dual purposes: it both indicates the rotation state and physically regulates the rotation when needed, reducing the need for separate control systems.
Data Source
AI summary
A projection apparatus having a light modulation element includes a main body; an optical unit that is rotatably supported by the main body and includes a projection optical system for projecting the spatially modulated light onto the projection surface, a first rotation member rotatably supported to the main body and a second rotation member rotatably supported to the first rotation member; a first sensor; a second sensor; a controller; and a regulation mechanism, and the regulation mechanism includes a moving member that is movable between a regulation position for regulating the rotation and a regulation release position for releasing the regulating of the rotation, and fixes the moving member at the regulation position in a case where the controller determines that the first rotation member and the second rotation member are in the predetermined specific rotation state.