Electromechanical Lock Entrainer Blocking 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' technique, compromising security.
Innovation Solution
The electromechanical lock incorporates an entrainer that can be selectively positioned into a standby, blocking, or release position by an electric motor, controlled by a circuit, to ensure the latch is automatically locked in the correct position and secured against unauthorized movement, enhancing security against break-in attempts.
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 vulnerability to unauthorized opening attempts increases
Solution Approach 1:
The entrainer is designed with multiple selectable positions (blocking position, standby position, release position) that can be dynamically switched between based on operational requirements. This dynamic configuration allows the system to adapt its security state, blocking the latch during locking operations while allowing controlled movement during authorized opening, thus resolving the contradiction between automatic locking and security.
Solution Approach 2:
The entrainer acts as an intermediary component between the electric motor and the latch. By positioning the entrainer in a blocking position, it mediates the interaction by preventing direct force application to the latch, thereby protecting the automatic locking function from unauthorized manipulation while maintaining the preload mechanism for legitimate operation.
2Ease of operation
If the latch is released to move into the unlocking position for automatic locking, then the ease of operation is improved, but the risk of unauthorized opening increases
Solution Approach 1:
The entrainer is positioned in a blocking position before the automatic locking operation begins. This preliminary action prevents unauthorized opening attempts from succeeding, as the latch is mechanically blocked from moving to the unlocking position. When authorized opening is required, the entrainer is then moved to the release position to allow the latch to move freely, thus resolving the contradiction between ease of operation and security.
3Reliability
If the entrainer is positioned in the blocking position to prevent unauthorized opening, then the security is improved, but the complexity of the control system increases
Solution Approach 1:
The entrainer serves multiple functions by being capable of positioning itself in different states (blocking, standby, release) based on control signals. This multi-functionality consolidates what would otherwise require separate mechanisms for security blocking and operational enabling, reducing overall system complexity while maintaining high security standards.
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
The lock provides a convenient automatic locking mechanism that securely locks the counter-piece in the closed position without additional user action, while preventing unauthorized opening attempts by blocking the latch's movement into the unlocking position, thus enhancing security.
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.