返へん金きん口ぐち

noun

coin return slot; change slot

Refers to the opening on vending machines, ticket machines, or similar devices where returned coins or change come out.

• 自じ動どう販はん売ばい機きの返へん金きん口ぐちからお釣つりを取とり忘わすれないでください。

  Please don't forget to take your change from the vending machine's coin return slot.