ATM Cassette Shutter Mechanism for Paper Return During Removal
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Solution Overview
Problem
When an ATM cassette is separated from the cassette receiving portion, paper media can remain at the entrance, causing exposure and potential jams upon reconnection, compromising security and reliability.
Innovation Solution
A cassette design featuring a shutter that opens and closes the entrance, utilizing a medium return gear and support portions to forcibly return paper media into the cassette body during separation, preventing exposure and jams through a mechanism driven by the shutter's moving force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cassette is separated from the cassette receiving portion to enable easy removal and replacement, then the ease of operation is improved, but the paper medium may remain at the entrance causing exposure and potential jams
Solution Approach 1:
The patent applies preliminary action by automatically returning the paper medium to the cassette body through the medium return gear portion before the cassette is fully removed from the cassette receiving portion. This prevents the paper medium from being exposed or causing jams during subsequent operations, while maintaining easy cassette removal and replacement.
2Reliability
If a mechanism is added to return the paper medium into the cassette during separation, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the medium return function with the existing shutter mechanism by making the medium return gear portion interact with the shutter gear. The shutter's opening and closing motion during cassette connection and separation is utilized to drive the medium return gear portion, which in turn moves the connection portion and second medium support portion to return the paper medium. This integration avoids adding a separate complex drive mechanism while ensuring reliable paper medium return.
3Ease of manufacture
If the second medium support portion is forcibly moved back using the shutter's closing force, then the ease of manufacture is improved by simplifying the structure, but the reliability of returning the paper medium must be maintained
Solution Approach 1:
The patent applies self-service by utilizing the shutter's own closing force during cassette separation to drive the medium return gear portion and return the paper medium. The shutter gear directly interacts with the medium return gear portion, converting the shutter's motion into the necessary force to move the connection portion and second medium support portion. This eliminates the need for additional motors or actuators, simplifying the structure while maintaining reliable paper medium return functionality.
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 effectively returns paper media into the cassette, enhancing security and reliability by preventing exposure and jams during connection and separation, and simplifying the structure for medium return without requiring a dedicated power source.
Implementation Method 1
a medium return gear portion rotatably formed at each of the opposite lateral sides of the cassette body so as to be connected to a connection portion gear connected to the connection portion and to a shutter gear formed at the shutter, the medium return gear portion configured to forcibly move the connection portion in a first direction away from the entrance by a moving force of the shutter when the entrance is closed
Data Source
AI summary
A cassette for an automatic teller machine (ATM) is provided, which is capable of returning a paper medium disposed at an entrance of the cassette into the cassette using a moving force of a shutter that closes the entrance, during separation of the cassette from a cassette receiving portion.