Electromechanical Lock Entrainer Control Against Hammer Blow Opening
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Solution Overview
Problem
Electromechanical locks with automatic locking functions are susceptible to unauthorized opening attempts, particularly through methods like the 'hammer blow', compromising security.
Innovation Solution
The electromechanical lock incorporates an entrainer that can be selectively rotated into a standby position to allow automatic locking and a blocking position to prevent unauthorized opening, using a control circuit to manage the electric motor and entrainer positions, ensuring the latch remains secured in the locking position unless intentionally released.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the latch is preloaded in the direction of the locking position to enable automatic locking, then the automatic locking function is improved, but the security against unauthorized opening attempts deteriorates
Solution Approach 1:
The entrainer is designed with multiple selectable positions (standby position, release position, blocking position) that can be dynamically switched between based on operational requirements. This dynamic configuration allows the system to adapt its locking behavior - enabling automatic locking during normal operation while providing enhanced security blocking when needed to prevent unauthorized opening attempts.
Solution Approach 2:
The system changes the operational parameter of the entrainer by selecting different positions (standby, release, blocking) to alter the latch's behavior. In the blocking position, the entrainer actively prevents the latch from moving to the unlocking position, thereby changing the security parameter while maintaining the automatic locking function through proper parameter selection.
2Extent of automation
If the latch is released to be urged back against the preload from the locking position to enable automatic locking, then the automatic locking function is improved, but the susceptibility to hammer blow attacks increases
Solution Approach 1:
The entrainer is configured to perform a preliminary blocking action by moving into the blocking position, where it actively prevents the latch from being moved to the unlocking position. This preliminary anti-action counteracts the harmful hammer blow attack by establishing a protective barrier before any unauthorized forcing can succeed, while still allowing the automatic locking function to operate when the entrainer is in the standby position.
3Reliability
If the entrainer is configured to block the latch against movement into the unlocking position to enhance security, then the security against break-open attempts is improved, but the ease of operation for authorized users deteriorates
Solution Approach 1:
The entrainer's position is made dynamic and selectable between standby, release, and blocking positions. For authorized users, the system can be configured to be in the standby position where automatic locking operates smoothly, or switch to the release position to facilitate easy opening. The blocking position is only activated when security enhancement is specifically required, thereby maintaining ease of operation during normal use while providing security when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design provides enhanced security against unauthorized opening attempts while maintaining convenience by allowing authorized users to easily open and close the lock without mechanical keys, using a control circuit to manage the entrainer positions.
Implementation Method 1
an electric motor (25) for driving the entrainer (23)
Implementation Method 2
the latch (21) is preloaded in the direction of the locking position (V)
Data Source
AI summary
An electromechanical lock includes an electromechanical locking mechanism and a control circuit, wherein an associated counter-piece is locked by way of the locking mechanism. The locking mechanism has a latch, an entrainer that is rotatable about an axis of rotation for driving the latch, and an electric motor for driving the entrainer, wherein the latch is moveable between a locking position and an unlocking position, wherein the latch is preloaded in the direction of the locking position. The entrainer is rotatable into a release position, a standby position, and a blocking position and the latch can is driven to perform a movement into the unlocking position by rotating the entrainer into the release position. In the standby position, the latch is released to be urged back against the preload. In the blocking position, the entrainer blocks the latch against a movement in the direction of the unlocking position.