Rotary Disc Reverse Rotation for Coin Dispensing
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Solution Overview
Problem
Conventional coin dispensing devices face challenges in quickly dispensing coins when the number is small, as the rotary disc may not receive coins efficiently due to angular stacking, leading to incomplete dispensing cycles and suboptimal use of retaining capacity.
Innovation Solution
The device employs a forward and reverse rotation mechanism for the rotary disc, where after dispensing a specified number of coins, the disc reverses direction by a predetermined amount to stir and position coins for better reception, ensuring quick dispensing and maximizing the retaining capacity, even when coins are angularly stacked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotary disc rotates forward to dispense coins, then coins are dispensed one by one, but when the remaining number of coins is small, the rotary disc does not receive coins quickly due to angular stacking
Solution Approach 1:
The rotary disc performs periodic forward and reverse rotations. After dispensing a specified number of coins in the forward direction, it reverses by a predetermined amount to redistribute coins, then resumes forward rotation. This periodic action prevents angular stacking and ensures reliable coin reception even when few coins remain.
Solution Approach 2:
Instead of continuously rotating forward, the system introduces reverse rotation as a corrective action. The reverse rotation redistributes coins that have become angularly stacked, allowing them to be properly positioned for the next forward dispensing cycle, thus solving the reception reliability problem.
2Reliability
If the rotary disc is rotated reversely to quickly receive coins, then coins are received in the receiver, but the coins remain located without dispensing
Solution Approach 1:
The system uses periodic forward and reverse rotations where reverse rotation is limited to a predetermined small amount just enough to redistribute coins for better reception, followed immediately by forward rotation to resume dispensing. This prevents coins from being stuck in the receiver while maintaining dispensing productivity.
3Ease of operation
If a rod-like elastic member is used to return the rotary disc, then the disc can be returned, but the member is difficult to apply in a small coin dispensing device with an aslant rotary disc
Solution Approach 1:
The patent replaces the mechanical rod-like elastic member with an electric brake system. The electric brake stops the rotary disc by applying electromagnetic braking force, and the disc's own inertia and the brake control enable the return motion, eliminating the need for additional mechanical return components in compact designs.
4Quantity of substance
If coins are angularly stacked in the retaining bowl, then the retaining capacity is not fully utilized, but flattening them by reverse rotation requires additional devices
Solution Approach 1:
The rotary disc serves multiple functions: it dispenses coins during forward rotation and simultaneously flattens angularly stacked coins during reverse rotation. This multi-functionality eliminates the need for separate flattening devices while maximizing retaining bowl capacity utilization.
Data Source
AI summary
A method and device for dispensing coins from a compact coin dispensing device while fully utilizing the storage capacity of a retaining bowl. The coin dispensing device or devices can be installed in a coin recycling machine where coins are retained by specific denominations. Detectors monitor the coins that are dispensed and the coins that are accepted into the retainer bowls and a control unit can appropriately coordinate and automatically drive a motor in a reverse direction for a predetermined movement and/or predetermined time after a coin dispensing operation and/or a coin depositing operation into a retainer bowl to prevent coin stacking and to maximize the storage capacity.