Shrouded Lockbox Latch Layout Against Seam Tampering
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Solution Overview
Problem
Conventional key safes and lockboxes are vulnerable to unauthorized access due to their locking mechanisms being positioned across the seam between the enclosure and access door, making them susceptible to tampering and improper manipulation.
Innovation Solution
A locking mechanism is designed with latch members spaced apart from the enclosure edges, protected by shrouds, and a blocking element that engages the latch members to prevent unauthorized access, with a combination dial system for secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking mechanism is positioned across the seam between the enclosure and access door, then the locking mechanism can effectively control access, but the locking mechanism becomes vulnerable to tampering and unauthorized access
Solution Approach 1:
The latch members are repositioned from a conventional linear arrangement across the seam to a spaced-apart arrangement positioned away from the perimeter edges. This dimensional change in positioning the locking components away from the vulnerable seam area eliminates the tampering vulnerability while preserving the access control function.
Solution Approach 2:
A blocking element is introduced as an intermediary component between the latch members and the external environment. This blocking element secures the latch members in their spaced-apart positions and prevents unauthorized manipulation, thereby resolving the security vulnerability while maintaining effective access control.
2Reliability
If latch members are spaced apart from the enclosure edges, then the risk of tampering is reduced, but the locking mechanism becomes more complex
Solution Approach 1:
The blocking element is designed to perform multiple functions simultaneously: it secures the latch members in their spaced-apart positions, prevents tampering with the latch mechanism, and maintains the structural integrity of the locking system. This merging of functions reduces the need for additional separate components, thereby limiting the increase in overall device complexity.
3Reliability
If a shroud is added to enclose the latch and staple portions, then unauthorized access is prevented, but the device complexity increases
Solution Approach 1:
The shroud is designed as a multi-functional component that simultaneously encloses the latch members and staple portions to prevent unauthorized access, provides structural support for the spaced-apart latch arrangement, and integrates with the existing housing and access door assembly. This universal design approach minimizes the increase in device complexity by combining multiple protective and structural functions into a single component.
Data Source
AI summary
A lockable enclosure includes a housing, a locking mechanism, and an access door assembled with the housing and movable between a closed position and an open position. When the access door is in the closed position, at least one latch member is movable between an interlocking position in interlocking engagement with a staple portion at a location spaced apart from adjoining perimeter edges of the housing and the access door, and a releasing position disengaged from the staple portion to permit movement of the access door from the closed position to the open position. The locking mechanism is operable between a locking condition in which the at least one latch member is secured in the interlocking position, and an unlocked condition in which the at least one latch member is movable to the releasing position.