Coin Dispenser Backward Rotation Guide Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional coin dispensers have a limited range of applicable coin diameters due to the need for a certain distance L2, which restricts the backward rotation of the rotating disk when the coin's center is outside the rotation circle trajectory, leading to coin jamming and reduced dispensing efficiency.
Innovation Solution
A coin dispenser design with a rotating disk that can rotate backward even when the coin's center is outside the rotation circle trajectory, utilizing a cylindrical first guide and an elastically biased ejecting roller to increase the returning force and reduce dispensing resistance, allowing for a wider range of coin diameters to be dispensed without adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotating disk rotates backward to eliminate coin jamming, then coin jamming is reduced, but the coin cannot be returned to the storage hole when the coin's center is outside the rotation circle trajectory
Solution Approach 1:
A guide surface is introduced as an intermediary element between the coin and the rotating disk. This guide surface directs the coin back to the storage hole during backward rotation, enabling the system to handle coins with centers outside the rotation circle trajectory while maintaining reliable jamming elimination
Solution Approach 2:
The function of coin return is segmented from the main rotating disk mechanism. The guide surface handles the coin return function independently, allowing the rotating disk to focus on jamming elimination while the guide surface manages the coin's path back to storage
2Adaptability or versatility
If the opening width of the coin lead-out opening is increased to accommodate larger coins, then larger coins can be dispensed, but the third contact point cannot form properly with the separate roller
Solution Approach 1:
The separate roller is made movable rather than fixed. It can dynamically adjust its position along the guide surface to maintain proper contact with the coin during backward rotation, ensuring the third contact point forms correctly regardless of coin size or opening width
3Speed
If the virtual straight line connecting contact points leans outside from the coin center, then the coin can be pushed forward, but the returning force during backward rotation is insufficient
Solution Approach 1:
The guide surface is designed with a curved configuration rather than a straight line. This curvature allows the virtual straight line connecting contact points to lean inside from the coin center during backward rotation, creating a returning force component that pushes the coin back to the storage hole while maintaining forward pushing capability
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 design enables the coin dispenser to handle a broader range of coin diameters by ensuring the coin can be reliably dispensed and returned to the storage hole during backward rotation, reducing moving resistance and preventing jamming, thus expanding the applicability of the dispenser.
Implementation Method 1
an ejecting roller (120) disposed outside of the storage hole (144) on the base (104) with a predetermined interval from the second coin guide (110L) and elastically biased so as to get closer to the second coin guide (110L)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An object of the present invention is to expand a dispensable diameter range of a coin dispenser that can dispense coins having diameters within a predetermined range without the need of part replacement and some sort of adjustment. Coins are dropped into and sorted by through holes one by one by forward rotation of a rotating disk, are guided by a circular coin guiding wall of a storage hole while the coins are pushed by pushers on a lower surface, the coins are then guided in the circumferential direction of the rotating disk by an outlet rotor constituting an outlet guide, are guided by a hopper, and are ejected by an ejecting roller. If coin jamming occurs, the rotating disk is rotated backward, and the coin pushed by a rear surface tip of the pusher is guided by a cylindrical surface of the outlet rotor. Since it is the cylindrical surface, the angle formed by the pushing force by the pusher and the reactive force from the outlet rotor is increased, the coin is returned into the storage hole, backward rotation can be continued, and the coin jamming can be eliminated.