Safe Bag Handle With One-Sided Torque Transmission
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Solution Overview
Problem
In automated teller machines, the existing safe bag modules can unintentionally unlock on one side when the handle is pulled without first unlocking the active locking unit, leading to errors in note deposition due to improper positioning.
Innovation Solution
The handle is designed with a first hole that transmits torque to the shaft on one side, ensuring the second hook remains engaged with the compartment's engagement element, while the second hole does not transmit torque, preventing unintentional unlocking. This is achieved through a unique handle design with a reinforcing element and projections that allow torque transmission only on one side, combined with a play mechanism between the shaft and the second hook to prevent rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle is designed with two-sided torque transmission, then the handle can be easily rotated to unlock the safe-bag module, but the second hook may unintentionally disengage from the engagement element when the first hook is locked
Solution Approach 1:
The handle is segmented into two distinct functional zones: a first region with a first hole that transmits torque to the shaft, and a second region with a second hole that does not transmit torque. This segmentation allows differential torque transmission across the handle, enabling easy rotation at the first end while preventing unintended rotation at the second end, thus resolving the contradiction between ease of operation and reliability of hook engagement
Solution Approach 2:
Different regions of the handle are given different mechanical properties: the first hole is shaped to engage with the shaft and transmit torque, while the second hole is shaped to allow free movement without torque transmission. This local differentiation in quality enables the handle to provide both easy rotation where needed and rotation prevention where critical for maintaining hook engagement
2Adaptability or versatility
If the shaft is rotated to move the first hook from locked to unlocked position, then the locking unit can change operating state, but the second hook may lose engagement with its engagement element
Solution Approach 1:
The handle acts as an intermediary mechanism that controls shaft rotation. By designing the handle with asymmetric torque transmission capabilities, it mediates between the operator's input and the shaft's rotation, allowing controlled rotation for locking state changes while preventing excessive rotation that would cause the second hook to disengage, thus maintaining positioning accuracy
3Stability of the object's composition
If both holes in the handle transmit torque to the shaft, then the handle provides balanced support, but unintentional unlocking occurs when pulling the handle without activating the locking unit
Solution Approach 1:
The handle employs asymmetric design where the first hole and second hole have different geometries and torque transmission characteristics. The first hole is configured to transmit torque effectively, while the second hole is configured not to transmit torque. This asymmetry resolves the contradiction by providing stable support through the first hole while preventing unintentional unlocking through the second hole's non-transmitting design
Data Source
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AI summary
The invention relates to a device (10) for receiving banknotes, comprising a receiving area (12) for receiving banknotes and a shaft (20) at each end of which a hook (26, 28) is mounted, which can be moved between a locked position and an unlocked position by rotating the shaft (20). Furthermore, a handle (14) is arranged on the shaft (20), the shaft (20) passing through a first hole (34) and a second hole (36) at the two ends (16, 18) of the handle (14). The first hole (34) is shaped such that, when the handle (14) is rotated, a torque can be transmitted to the shaft (20) at least within a predetermined range of rotation via an engagement between the shaft (20) and the first end (16) of the handle (14). The second hole (36), on the other hand, is shaped in such a way that when the handle (14) is rotated over the second end (18), no torque is transmitted to the shaft (20).