Story Projector Face-Gear Drive for Stable Film Alignment
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Solution Overview
Problem
Conventional projectors face issues with transmission efficiency, torque transfer, and durability due to mechanical gear limitations, leading to poor meshing, significant transmission errors, and structural loosening, compromising pattern display accuracy and projection stability.
Innovation Solution
A projector design utilizing face gears for the driving and driven gears, combined with a precise optical assembly and guiding slots, ensures smooth and stable film rotation, maintaining accurate alignment even under external vibrations, and includes an audio assembly for immersive projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional gear transmission systems (bevel gears or spur gears) are used for film rotation, then the projector structure is simple and easy to manufacture, but the transmission efficiency is poor, torque transfer is insufficient, and transmission errors are significant during long-term high-speed operation
Solution Approach 1:
The patent changes the fundamental parameters of the gear transmission system by replacing conventional bevel gears or spur gears with face gears. This parameter change transforms the meshing characteristics, allowing for better torque transfer and reduced transmission errors while maintaining manufacturing feasibility. The face gear configuration enables more uniform stress distribution and improved engagement characteristics during high-speed rotation.
Solution Approach 2:
The patent substitutes the conventional mechanical gear system with a refined face gear transmission mechanism. This substitution replaces the problematic bevel or spur gear arrangements with a more advanced mechanical system that provides superior transmission performance, including better meshing characteristics and reduced wear during long-term operation.
2Device complexity
If conventional gear transmission systems are used for film rotation, then the device complexity is low, but the transmission errors are significant and pattern display accuracy is compromised
Solution Approach 1:
The patent changes the geometric parameters and meshing characteristics of the transmission system by implementing face gears. This parameter change reduces transmission errors and improves pattern display accuracy while keeping the overall device complexity manageable. The face gear design provides more precise angular positioning and reduced backlash.
3Stability of the object's composition
If mechanical connection points are increased for film disc installation, then the film disc can be securely fixed, but structural loosening and wear occur at multiple connection points, constraining stability and durability
Solution Approach 1:
The patent extracts and eliminates unnecessary mechanical connection points from the film disc installation structure. By reducing the number of connection points, the design removes multiple potential sites for structural loosening and wear, thereby improving both stability and durability. The film disc is securely fixed through optimized positioning mechanisms that require fewer connection points.
4Productivity
If high-speed rotation of the film disc is achieved for continuous projection, then productivity is improved, but transmission errors increase and pattern display accuracy deteriorates
Solution Approach 1:
The patent changes the transmission system parameters by implementing face gears that are specifically designed to maintain precision during high-speed rotation. This parameter change allows the system to achieve both high productivity through continuous fast rotation and maintain accurate pattern display by reducing transmission errors through the superior meshing characteristics of face gears.
Data Source
AI summary
The present invention discloses a story projector, used for projecting patterns on a film onto a light-shadow projection surface for display. The story projector includes: a body and a film disc that carries the film, where the body is provided with an insertion slot and a projection aperture, and the film disc is movably inserted into the insertion slot; and the film disc includes a housing and a rotating disc that is rotatably installed within the housing, with the film positioned on the rotating disc and disposed corresponding to the projection aperture. The body includes an optical assembly and a drive assembly located within the body, where the optical assembly emits light towards the projection aperture, and the film is located between the optical assembly and the projection aperture. The technical solutions of the present invention effectively improves the practicality of the story projector.