RFID Utility Cart Cabinet Latch for Hands-Free Secure Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Utility carts with traditional locking mechanisms are inconvenient for users, as they require manual key operation, which can be cumbersome and may lead to accidental locking or unlocking issues.
Innovation Solution
A utility cart equipped with a latch and strike lock system that uses a passive near-field RFID key device for unlocking, where a microcontroller-activated servo motor temporarily holds the latch open, allowing secure and convenient access to the cabinet, and automatically relocks with a biased mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional manual key lock is used, then the locking mechanism is simple and reliable, but the ease of operation deteriorates due to manual key insertion and turning
Solution Approach 1:
The patent replaces the traditional mechanical key-operated locking system with an electronic RFID-based system. The RFID reader communicates with a key fob to electronically control the latch motor, eliminating the need for manual key insertion and turning. This substitution of mechanical operations with electronic control directly improves ease of operation while accepting increased device complexity through the addition of RFID components and motorized latch mechanisms.
2Reliability
If a motorized latch system is implemented, then the reliability of automatic locking is improved, but the device complexity increases due to additional electronic components
Solution Approach 1:
The patent implements a self-service locking system where the latch motor automatically engages the latch arm into the locked position after the cabinet door is closed, without requiring user intervention. The system uses sensors to detect door closure and automatically activates the motor to secure the latch, improving reliability by eliminating human error in the locking process. This automation inherently increases device complexity through the addition of motors, sensors, and control circuitry.
3Ease of operation
If RFID technology is used for unlocking, then the ease of operation is improved through contactless access, but the device complexity increases due to electronic control systems
Solution Approach 1:
The patent replaces mechanical key operations with contactless RFID technology. The RFID reader detects the key fob wirelessly and triggers the latch motor without requiring physical contact or manual manipulation. This eliminates the need for users to fumble with keys in their pockets or manually operate keyholes, significantly improving ease of operation. The trade-off is increased device complexity through the integration of RFID readers, wireless communication modules, and electronic control systems.
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 secure, hands-free operation of the cabinet door using an RFID key, ensuring easy access while maintaining security and reducing the risk of accidental unlocking or locking.
Implementation Method 1
unlocked in the presence of a passive near field RFID key device
Implementation Method 2
The latch is biased to its locking position, to which it returns when released by the controller
Implementation Method 3
The latch includes a ramp surface which is engaged by the leading edge of the strike as the cabinet door is closed. In this way, the strike pushes the latch out of the way as it passes over the end of the latch
Data Source
AI summary
A utility cart includes a cabinet with a latch and strike lock, which is unlocked in the presence of a passive near field RFID key device and held open by a latch controller for sufficient time to allow the user to open the unlocked cabinet door. The latch is biased to its locking position, to which it returns when released by the controller. The latch includes a ramp surface which is engaged by the leading edge of the strike as the cabinet door is closed. In this way, the strike pushes the latch out of the way as it passes over the end of the latch, and the biased latch then returns to its locking position engaging a keeper in the strike as the keeper passes into position opposite the latch.