Camera Barrier Unit Blade Guide Rail Clearance
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Solution Overview
Problem
Conventional barrier units for cameras face issues with vertical misfit of blades, leading to ruined appearance and smooth movement interference, and fail with blades of low planarity due to insufficient or excessive clearance between blade edges.
Innovation Solution
The barrier unit design includes blade guide rail portions with increased thickness near contact points and regulating portions that protrude to manage clearance, ensuring blades fit properly and move smoothly, even with blades of low planarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If clearance is increased to accommodate blades with low planarity, then blades can move smoothly, but vertical misfit and overlap occur ruining appearance
Solution Approach 1:
The guide rail portions are designed with different thicknesses at different locations. Specifically, the guide rail portions have increased thickness in the region where blades contact each other when closed, providing localized support to prevent vertical misfit and overlap, while maintaining adequate clearance elsewhere for smooth blade movement. This local structural variation resolves the contradiction between appearance and ease of operation.
2Shape
If clearance is decreased to improve appearance, then vertical misfit is reduced, but blades with low planarity cannot move smoothly
Solution Approach 1:
The guide rail portions provide localized structural support at critical contact regions while maintaining adequate clearance in other areas. This allows the barrier unit to achieve both good appearance (by preventing vertical misfit at contact points) and smooth operation (by maintaining clearance for blade movement), resolving the contradiction between shape and ease of operation.
3Shape
If blade edges are made to contact without overlap, then appearance is improved, but blades with low planarity fail to operate
Solution Approach 1:
The guide rail portions with varied thickness provide localized support exactly where blades contact each other, preventing vertical misfit and overlap to maintain appearance. Meanwhile, the overall guide structure maintains adequate clearance to accommodate blades with low planarity, ensuring reliable operation. This local structural differentiation resolves the contradiction between appearance and reliability.
Data Source
AI summary
The present invention provides a barrier unit structure that can avoid not only ruining the appearance of a barrier unit due to a vertical misfit of blades that contact with each other at their edges when closed but also interfering with smooth movement of the blades due to their unintentional overlap.The barrier unit includes: a base, which defines a first window; a cap, which defines a second window and which is arranged so that the second window faces the first window; and a number of blades, which are arranged between the base and the cap so as to open or close with respect to the first and second windows. In a space between the base and the cap, clearance e left in the vicinity of a first position, where the blades contact with each other at their edges when closed, is smaller than clearance d left at a second position, which is different from the first position.