Base Slat Pry Stopper for Rolling Shutter Security
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Solution Overview
Problem
Rolling shutter assemblies are vulnerable to pry bar attacks due to the flexibility of the base slat, which can be pried up, compromising security and allowing ingress into structures.
Innovation Solution
A base slat locking bracket is mounted to the opening bottom wall, allowing the base slat to move upward and downward, engaging with the base slat to prevent it from deflecting upward when a force is applied, thereby preventing pry bar attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base slat is made flexible to allow upward and downward movement, then the ease of operation is improved, but the security against pry bar attacks deteriorates
Solution Approach 1:
A locking bracket is introduced as an intermediary component between the base slat and the opening bottom wall. The bracket includes a locking surface that engages with the base slat to prevent upward deflection during pry bar attacks, while allowing normal upward and downward movement during operation. This intermediary structure resolves the contradiction by providing both movement capability and security resistance.
2Reliability
If the base slat is made rigid to prevent deflection, then the security against pry bar attacks is improved, but the ease of operation deteriorates
Solution Approach 1:
The security function is segmented from the base slat itself and transferred to a separate locking bracket component. The base slat remains flexible for operation, while the locking bracket provides the rigid resistance against pry bar attacks. This segmentation allows each component to optimize its specific function without compromise.
Solution Approach 2:
The locking bracket is designed to be dynamically engaged or disengaged from the base slat. During normal operation, the base slat can move upward and downward freely. During security events, the locking bracket engages to prevent upward deflection. This dynamic behavior resolves the contradiction between flexibility for operation and rigidity for security.
Data Source
AI summary
A base slat pry stopper, such as a base slat locking bracket, for locking a rolling shutter curtain covering an opening of a structure is disclosed. The base slat pry stopper may include a bracket base plate mounted to an opening bottom wall on an interior side of the shutter curtain, and a base slat engagement portion extending upward from the bracket base plate and above a top surface of the opening bottom wall. When the shutter curtain is unrolled to cover the opening, the base slat engagement portion engages the base slat to prevent the base slat from deflecting upward away from the opening bottom wall when a force applied from an exterior side of the shutter curtain causes the base slat to deflect toward the interior side of the structure and the shutter curtain. The base slat pry stopper may be permanently or removably installed.