Bolt Lock Security Mechanism Against Vibration-Induced Unlocking
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Solution Overview
Problem
Existing security systems for locks are vulnerable to unauthorized tampering, particularly through intense vibrations that can momentarily unlock the bolt, and existing anti-tamper cams are not effective in preventing such unauthorized access.
Innovation Solution
A security system for locks equipped with a closed-door detector and an anti-tamper cam that moves to a locking position upon contact with the doorframe, combined with a hinged locking element that rotates to act as a stop for the bolt, preventing unlocking during intense vibrations, and geometric conditions ensuring the hinged locking element locks the bolt before the anti-tamper cam ceases to do so.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an anti-tamper cam is used to prevent unauthorized access, then security against card insertion attacks is improved, but the lock becomes vulnerable to intense vibrations that can momentarily unlock the bolt
Solution Approach 1:
The locking function is divided into two independent mechanisms: the anti-tamper cam for preventing card insertion attacks and the hinged locking element for preventing vibration-induced unlocking. Each segment addresses a specific threat independently, so failure of one does not compromise overall security.
Solution Approach 2:
The hinged locking element is positioned to engage the bolt in advance, creating a preliminary barrier that prevents the bolt from moving even if the anti-tamper cam is momentarily displaced by vibrations. This pre-positioned locking action neutralizes the vibration vulnerability.
2Reliability
If the anti-tamper cam is positioned to actively prevent bolt movement, then protection against tampering is improved, but the device complexity increases
Solution Approach 1:
The hinged locking element is designed to automatically engage and disengage based on the position of the bolt, without requiring additional actuators or complex control mechanisms. The element uses the bolt's own movement to trigger its locking and unlocking actions, simplifying the overall system.
Solution Approach 2:
Instead of using a complex mechanism to actively lock the bolt in place, the invention uses a passive hinged element that allows free movement during normal operation and automatically engages only when needed to prevent unauthorized access, inverting the traditional active-locking approach.
3Reliability
If the lock provides strong resistance to bolt movement, then security is improved, but the ease of operation during normal locking/unlocking deteriorates
Solution Approach 1:
The hinged locking element is designed with dynamic characteristics that allow it to remain passive during normal bolt movement for locking and unlocking operations, then automatically engage to provide strong resistance only when unauthorized tampering is detected, thus maintaining ease of operation while providing strong security when needed.
Data Source
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AI summary
The invention relates to a security system for bolt locks (1) provided with a closed-door detector (7), an anti-tamper cam (2) and a hinged locking element (4) with a second axis (5) of articulation and which is provided with a bolt (1) locking portion (4a).