Rotary Cable Latch Prevents Vandalism via Front Cover Constraint
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Solution Overview
Problem
Existing lock box retention mechanisms, such as spring loaded push button mechanisms, are vulnerable to inadvertent opening during acts of vandalism, as they can be overcome by applying force, such as hammer blows, compromising security.
Innovation Solution
A lock box design featuring a rotatable retention mechanism with a latched and unlatched position, where the front cover limits movement of the retention mechanism, and a locking mechanism that must be unlocked to access the connector, preventing unintended release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring loaded push button retention mechanism is used, then the connector can be easily released by applying force to the push button, but the mechanism is vulnerable to inadvertent opening during acts of vandalism such as hammer blows
Solution Approach 1:
The retention mechanism transitions from a static spring-loaded push button system to a dynamic rotary latching system. The rotary mechanism requires rotational movement to disengage, creating a dynamic security feature that responds differently to various types of force application. This dynamic characteristic prevents inadvertent opening while maintaining controlled release capability.
Solution Approach 2:
The invention changes the operational parameter from linear push motion to rotational motion. By requiring the retention mechanism to rotate between latched and unlatched positions rather than simply push against spring force, the system fundamentally alters how force is applied and resisted. This parameter change makes the system resistant to hammer blows while preserving ease of legitimate release.
2Ease of operation
If the front cover is made movable to allow access to the retention mechanism, then the retention mechanism can be accessed and operated, but the connector could potentially be released by moving the front cover without proper authorization
Solution Approach 1:
The system is segmented into two independent security layers: the front cover locking mechanism and the rotary retention latching mechanism. The front cover can be opened to provide access, but the actual connector release requires separate rotation of the retention mechanism. This segmentation ensures that mere access to the mechanism does not equate to connector release capability.
Solution Approach 2:
The rotary retention mechanism acts as an intermediary between the front cover and the connector. Even when the front cover is opened providing access to the retention mechanism, the connector remains secured unless the rotary mechanism is actively rotated to the unlatched position. This intermediary layer prevents direct correlation between cover opening and connector release.
Data Source
AI summary
A lock box is provided including a base plate. A back cover is mounted to the base plate and includes a first internal compartment. A first end of a connector is mounted within the first internal compartment and a second end of the connector, including an inlet, is selectively retained within the first internal compartment. A retention mechanism is configured to rotate between an unlatched and a latched position to selectively retain the second end of the connector. A front cover coupled to the base plate is movable between a closed and open position. When the front cover is in the closed position, the front cover limits movement of the retention mechanism between the latched and unlatched positions.