Voucher Transport Device Dual Locking Mechanism
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Solution Overview
Problem
In cash centers, the existing locking arrangements often lead to unauthorized opening of cash boxes, resulting in unnecessary invalidation of notes of value due to accidental triggering of the cancellation unit, causing free invalidation and unnecessary costs.
Innovation Solution
A device with a second locking unit and a control unit that ensures the lid can only be opened after the cancellation unit is deactivated, preventing accidental triggering and featuring a manually operable lock for authorized access, along with an ink kit for irreversible invalidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single locking unit is used to secure the lid, then the device is simple to operate, but unauthorized opening can occur leading to false validation triggering
Solution Approach 1:
The locking system is divided into two independent locking units: a first locking unit for general security and a second locking unit specifically linked to the validation unit. This segmentation allows the validation unit to remain inactive during normal operations while providing an additional layer of security against unauthorized opening that would trigger false validation.
Solution Approach 2:
The second locking unit is pre-configured to prevent opening of the lid unless the validation unit is properly deactivated beforehand. This preliminary action ensures that even if someone gains access to the first locking unit, they cannot trigger the validation unit accidentally, thus preventing false validation while maintaining operational simplicity.
2Reliability
If the validation unit is always active to prevent theft, then security is improved, but banknotes are unnecessarily invalidated when the lid is opened legitimately
Solution Approach 1:
The validation unit's state is made dynamic rather than static. It can be switched between active and inactive states based on operational requirements. The second locking unit dynamically controls access to the lid based on the validation unit's state, allowing legitimate opening without triggering validation while maintaining security when needed.
Solution Approach 2:
The second locking unit acts as an intermediary between the lid opening action and the validation unit. It mediates the interaction by preventing lid opening when the validation unit is active, thus avoiding false triggering of the validation unit while still allowing secure access when the validation unit is properly deactivated.
3Reliability
If a manually operable lock is used to ensure authorized access, then security against tampering is improved, but the complexity of the locking mechanism increases
Solution Approach 1:
The locking mechanism is segmented into two separate units with distinct functions. The first locking unit provides basic manual security, while the second locking unit provides controlled access linked to the validation unit's state. This segmentation achieves reliable authorized access control without requiring a single complex locking mechanism, as each unit can be implemented with simpler components.
Data Source
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AI summary
The device has a container comprising a retaining area for accommodating vouchers and an opening. A cover (14) closes the opening, and a locking unit (30) locks the cover. A control unit controls another locking unit (40) that inhibits opening of the cover in a locked condition. The control unit adjusts the latter locking unit from the locked condition to an unlocked condition when a validation unit is adjusted from an activated condition to a deactivated condition, where the cover is not opened when the former locking unit and/or the latter locking unit is arranged in the locked condition.