Projector Bracket Assembly for Close-Fit Lens Covering
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Solution Overview
Problem
Existing projection devices face issues with lens covers being inconvenient to use and risking loss, and brackets with lens cover functions interfere with the housing, creating gaps that compromise lens protection and limit housing design.
Innovation Solution
A projection device with a bracket assembly featuring a housing with a limit groove and adapter, allowing the bracket to pivotally connect and move in a way that narrows the gap with the projection hole, avoiding interference with the housing during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bracket is designed to cover the projection hole, then lens protection effect is improved, but the bracket interferes with the housing during rotation
Solution Approach 1:
The limit groove is divided into a curved section and a linear section, allowing the bracket to follow different motion paths during rotation versus when covering the lens, resolving the conflict between rotation freedom and protection effectiveness
Solution Approach 2:
The bracket is enabled to move not only radially during rotation but also axially along the linear section of the limit groove, adding a dimensional degree of freedom that allows it to approach the lens closely when needed while clearing the housing during rotation
2Reliability
If the gap between the bracket and lens is narrowed to improve protection, then lens protection effect is improved, but the housing design is limited due to interference
Solution Approach 1:
The bracket transitions from a static position to a dynamic system that can adjust its position along the limit groove, enabling it to achieve minimal gap with the lens when required while maintaining clearance with the housing during rotation, thus preserving housing design flexibility
Solution Approach 2:
The limit groove acts as an intermediary mechanism that mediates between the bracket and housing, guiding the bracket's motion to achieve close proximity to the lens without direct interference with the housing structure
3Ease of operation
If the bracket is connected by a string, then the bracket can be removed, but the placement position is restricted and appearance is poor
Solution Approach 1:
The string connection is extracted and replaced with a direct structural connection through the limit groove mechanism, eliminating the need for a separate string component while achieving the desired removability and unrestricted placement
Data Source
AI summary
A projection device includes a housing and a bracket assembly. The housing has a first side wall and a second side wall connected to each other, the first side wall has a connecting portion and a limit groove, the limit groove has a curved section and a linear section connected to each other. The second side wall has a projection hole. The bracket assembly includes an adapter and a bracket. The adapter is movably connected to the connecting portion. The bracket is pivotally connected to the adapter and has a limit post extending into the limit groove. When the limit post moves to the linear section, the adapter is adapted to move in the connecting portion and drives the limit post to move in the linear section, so the bracket can be closer to the projection hole and the effect of covering the projection hole by the bracket is improved.