| 摘要 |
PURPOSE: A vending machine capable of returning a purchased item of the vending machine is provided to return an undesired item to the vending machine. CONSTITUTION: A return slot(1) for returning a beverage is opened by pushing a return button. The beverage to be returned is inserted into the return slot. The return slot discharges a desired beverage stored inside of a vending machine. A sensor is installed on a return slot in order to detect the opening of the returned beverage. |
