Drawer Locking System with Dual Actuator Mechanism
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Solution Overview
Problem
Current locking systems for file cabinets are prone to security compromises, as they can be improperly locked or allow unauthorized access due to misalignment and interference with stored items, and often require complex mechanisms that can be cumbersome.
Innovation Solution
A locking system that employs a dual actuator mechanism with a drive actuator and a follower actuator positioned on opposite sides of the drawer, using a spline or plunger pin arrangement to ensure secure locking across the width of the drawer, minimizing interference with stored items and preventing accidental locking when the drawer is open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lock and actuator are located on one side of the drawer, then the locking mechanism is simple to implement, but the opposite side of the drawer can be opened a large distance compromising security
Solution Approach 1:
The locking system is divided into two independent actuating mechanisms: a drive actuator and a follower actuator, positioned at opposite ends of the drawer. Each actuator independently controls a lock bar at its respective location, segmenting the single locking function into distributed locking points that collectively secure the entire drawer width.
Solution Approach 2:
The system transitions from a single-point locking approach to a distributed multi-point locking system by adding spatial distribution along the drawer width dimension. The shaft connecting the actuators operates in the horizontal dimension while the lock bars operate vertically, creating a two-dimensional locking plane that prevents drawer opening from any location.
2Device complexity
If the lock is located at the center of the drawer, then the locking is centralized, but a shaft used to communicate rotation of the lock to the actuator and/or the lock bar may interfere with files placed into the file cabinet
Solution Approach 1:
The shaft connecting the drive actuator and follower actuator is extracted from the central drawer area and repositioned to run along the top or bottom edge of the drawer, parallel to the drawer's length. This removes the shaft from the file storage zone, eliminating interference with files while maintaining the mechanical connection between actuators.
Solution Approach 2:
The shaft is relocated from a vertical or central position to a horizontal position along the drawer's perimeter, utilizing the unused spatial dimension at the drawer edges. This repositioning allows files to be stored in the central area without obstruction while the shaft operates at the periphery.
3Ease of operation
If users can open a drawer and turn the lock into a locked position, then the lock is easy to operate, but upon closing the drawer the lock is then not capable of being placed into the locked position
Solution Approach 1:
The system performs preliminary verification by checking drawer closure status before enabling the locking function. The follower actuator monitors the drawer position and only allows the drive actuator to engage the lock bar when the drawer is confirmed to be in the closed position, preventing premature or improper locking attempts.
Solution Approach 2:
The follower actuator provides feedback about the drawer's closed position to the drive actuator through the shaft connection. This feedback mechanism ensures that the locking action can only be transmitted when the drawer is properly closed, as the follower actuator's position confirms closure before allowing the lock bar to engage.
Data Source
AI summary
A locking system for drawers may include a lock with a lock driver that is configured for engaging a drive actuator. The drive actuator may have a lock bar slider in communication with a lock bar. A slave actuator may also be provided in communication with the drive actuator through a shaft. The drive actuator and slave actuator may be respectively positioned so as to lock opposite ends of a drawer. The locking system may also provide the lock with a lock driver that is prevented from being moved into a locked position when the drawer is opened. One of several different resulting arrangements prevents unintentional or inadvertent locking until the drawer is placed into engagement with a drive actuator.