Bolt Module Anti-Thrust Member Blocking Positions
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Solution Overview
Problem
Conventional locking systems face challenges in preventing unauthorized access, particularly due to the vulnerability of bolts to tampering and the need for an anti-thrust mechanism to prevent driving back, especially in complex entry situations requiring flexible access control and emergency egress.
Innovation Solution
A bolt module with a movable anti-thrust member and rotor assemblies that obstruct driving back of the bolt at various positions, combined with a bolt restraint latch and trigger mechanism to securely maintain the bolt in its retracted position, enhancing security by limiting unauthorized movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional bolt mechanism is used, then the structure is simple, but the bolt can be easily driven back by external force to gain unauthorized entry
Solution Approach 1:
The anti-thrust member is divided into multiple blocking positions (first blocking position, second blocking position, third blocking position) that correspond to different bolt positions (thrown, partially retracted, fully retracted). This segmentation provides comprehensive protection at each stage of bolt movement, preventing unauthorized entry while maintaining a relatively simple overall structure.
Solution Approach 2:
The anti-thrust member is positioned in advance at multiple blocking positions to prevent driving back of the bolt before unauthorized entry can occur. The mechanism proactively blocks potential attack vectors at the thrown position, partially retracted position, and fully retracted position, rather than reacting after the bolt is compromised.
2Ease of operation
If the bolt is allowed to move freely between thrown and retracted positions, then the operation is simple, but the bolt may hit the door frame or jamb causing damage or vulnerability
Solution Approach 1:
The bolt restraint mechanism uses a restraint latch and trigger to prevent the bolt from moving beyond safe limits. The restraint latch engages with the bolt at predetermined positions to stop its movement before it can strike the door frame or jamb, thereby preemptively eliminating the harmful effect of potential damage.
Solution Approach 2:
The restraint latch acts as an intermediary between the bolt and the door frame/jamb. Instead of allowing direct contact between the bolt and the door structure, the latch mechanism mediates the movement, controlling and limiting the bolt's travel distance to prevent harmful impacts.
3Reliability
If a deadbolt is used to prevent tampering, then security is improved, but the bolt cannot be easily restrained in the retracted position
Solution Approach 1:
The bolt restraint mechanism transitions from a static deadbolt configuration to a dynamic system where the restraint latch can engage and disengage based on operational needs. The trigger mechanism allows the restraint latch to be activated or deactivated, providing flexible control over bolt movement while maintaining security when needed.
Solution Approach 2:
The system changes the operational parameters of the bolt by introducing conditional restraint. Instead of a fixed deadbolt state, the restraint latch modifies the bolt's degrees of freedom based on the position of the trigger, allowing the system to switch between restricted and free movement states as required by different operational scenarios.
4Reliability
If multiple blocking positions are provided for the anti-thrust member, then protection against driving back is comprehensive, but the device complexity increases
Solution Approach 1:
Multiple blocking positions are combined into a single integrated anti-thrust member rather than using separate components for each position. The anti-thrust member incorporates all three blocking positions (first, second, and third) as part of its structure, providing comprehensive protection while minimizing the number of discrete parts and simplifying the overall mechanism.
Data Source
AI summary
A bolt module is disclosed. The bolt module comprises: a bolt moveable between a thrown position and a retracted position; an anti-thrust member moveable between a release position in which the bolt can be retracted and a plurality of blocking positions obstructing driving back of the bolt under action of an external force on the bolt and, a first rotor assembly capable of accepting a drive element, the first rotor assembly arranged to drive the bolt and to move the anti-thrust member between the plurality of blocking positions and the release position. Each of the plurality of blocking positions may respectively limit to different extents the driving back of the bolt under action of an external force on the bolt. There is also disclosed a leaf or door comprising the bolt module, wherein the bolt module is mounted on the leaf or door for securing the leaf or door.