Lockable Utility Box Lid With Recessed Fastener
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Solution Overview
Problem
Conventional utility box lids lack effective fastening mechanisms, making them susceptible to unauthorized access due to exposed fasteners, granular particle interference, and vulnerability to tampering or damage, which increases theft, vandalism, and maintenance costs.
Innovation Solution
A lockable utility box lid with a clamping mechanism that includes a security fastener with a non-standard head, a lock plate, and pivotable components, allowing for secure engagement with the utility box interior surfaces, reducing direct access and tampering risks through an indirect tool path and secure bolt head configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fasteners are used to secure the utility box lid, then the lid can be fastened to the enclosure, but the fastener heads are exposed and easily accessible allowing unauthorized access
Solution Approach 1:
The fastener head is nested within a recessed cavity in the lid, requiring the tool to be inserted through the lid thickness to access the fastener head. This nesting configuration prevents direct access to the fastener head from the exterior while still allowing authorized operation through the aperture.
Solution Approach 2:
A tool acts as an intermediary between the operator and the fastener mechanism. The tool must be inserted through the lid aperture to engage the fastener head, creating an intermediate access path that prevents direct manipulation of the fastener while enabling authorized operation.
2Reliability
If a keyed cylinder locking mechanism is used, then the lid can be secured, but the key entry point is upward facing making it prone to receive granular particles such as dirt and sand
Solution Approach 1:
Instead of having the key entry point face upward where particles can accumulate, the fastener mechanism is inverted so that the access aperture is on the top surface of the lid and the fastener head is recessed below. This inversion prevents granular particles from entering the locking mechanism while maintaining secure locking functionality.
3Reliability
If a locking mechanism requiring multiple holes and bolts is used, then secure fastening is achieved, but installation is time consuming and cost prohibitive
Solution Approach 1:
The lid incorporates a pre-formed recessed cavity that serves multiple functions: it provides the secure anchoring structure for the fastener, creates the protective enclosure for the fastener head, and forms the access aperture. This multi-functional feature eliminates the need for separate drilling and fastening operations, reducing installation time while maintaining security.
Data Source
AI summary
A lockable utility box lid includes at least one aperture therethrough for receiving a fastener. The locking mechanism preferably includes a utility box engagement member coupled to the underside of the utility box lid. The locking mechanism is movable between a locked and unlocked position. A fastener extends through the opening in the utility box lid and engages the locking mechanism. Rotating the fastener in a first direction causes the locking mechanism to assume a first, locked position. Rotating the fastener in a second direction causes the locking mechanism to assume a second, unlocked position. In the locked position the utility box engagement member is engaged with an interior surface of the utility box lid.