Locking Device Deactivation Mechanism
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Solution Overview
Problem
Existing fail-safe locking devices lack versatility, ease of installation, and reliability, particularly in allowing controlled opening and closing without power interruptions and are not suitable for frequent use due to mechanical deactivation mechanisms and cumbersome installation processes.
Innovation Solution
A tubular housing-based locking device with electrically driven drive means and a deactivation mechanism that allows movement from an active to an inactive position without electrical drive means, using a mechanical actuator and solenoid or electromagnet, enabling controlled operation and easy installation with a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical deactivation mechanism is used, then the locking device can be deactivated manually, but the device complexity increases and reliability decreases during power interruptions
Solution Approach 1:
The patent replaces the traditional mechanical deactivation mechanism with an electrically driven deactivation mechanism. The drive means includes an electric motor that can be controlled to retract the latch, eliminating the need for complex mechanical deactivation components while maintaining the ability to deactivate the lock manually through electrical control signals.
Solution Approach 2:
The electrically driven drive means serves multiple functions: it can extend and retract the latch during normal operation, deactivate the lock during power interruptions by retracting the latch, and be controlled through various input methods (manual switches, electronic control systems). This multi-functionality reduces overall device complexity compared to dedicated mechanical deactivation mechanisms.
2Reliability
If power supply is interrupted during latch movement, then the fail-safe mechanism should open the locking device, but the locking device fails to open if the electro-motor is coupled to the spindle
Solution Approach 1:
The patent implements a dynamic control system where the electric motor can be selectively engaged and disengaged from the spindle based on operational requirements. During normal controlled operation, the motor is coupled to enable precise latch movement. During power interruptions, the system automatically disengages the motor coupling and activates the fail-safe spring mechanism to ensure reliable latch retraction without requiring motor power.
Solution Approach 2:
The patent introduces a decoupling mechanism as an intermediary between the electric motor and the spindle. This decoupling mechanism allows the motor to be disconnected from the spindle during power interruptions, enabling the fail-safe spring mechanism to retract the latch independently. The decoupling mechanism thus mediates between the motor-driven operation and the spring-driven fail-safe operation, ensuring both functions work reliably without interference.
3Ease of manufacture
If several holes are provided in the door for placing the lock, then the locking device can be installed, but the installation becomes cumbersome and flexibility is reduced
Solution Approach 1:
The patent segments the locking device into modular components: a mounting plate that can be positioned at various locations on the door, a tubular housing that contains the latch mechanism, and a strike plate. The mounting plate includes multiple adjustable mounting holes and can be secured to the door at different positions, allowing flexible installation while simplifying the overall mounting process compared to traditional locks requiring multiple precise holes.
Solution Approach 2:
The patent transitions from a traditional multi-hole drilling approach to a dimensional adjustment solution. The mounting plate provides adjustable positioning along the door surface, allowing installation flexibility in multiple dimensions (horizontal and vertical positions) without requiring multiple precise holes to be drilled. This dimensional adjustability simplifies installation while maintaining position flexibility.
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 solution provides a versatile, easy-to-install, and reliable locking device that allows controlled opening and closing, remains functional during power interruptions, and can be easily positioned on doors, enhancing safety and flexibility in access control applications.
Implementation Method 1
using a mechanical actuator and solenoid or electromagnet, enabling controlled operation
Data Source
AI summary
A locking device is disclosed having (a) a tubular housing having a frontal end and a distal end; (b) a latch movable between a first position protruding from the frontal end of the housing and a second position wherein the latch is retracted in the housing; and (c) an electrically driven drive device for moving the latch between the first and second positions. The locking device further includes a deactivation mechanism provided in the housing and allowing movement of the drive device or at least part thereof from an active position wherein the drive device is enabled to move the latch between the first and second position and an inactive position wherein the latch is retracted in the housing irrespective of its movement by the electrical drive device.