| 摘要 |
A coin selection device includes a coin path portion and a photo sensor. The coin path portion is formed so as to allow a passage of a coin due to its own weight. The photo sensor includes a light emitting portion and a light receiving portion to detect a coin passing through the coin path portion. The light emitting portion emits light while modulating an oscillation of the light. The light receiving portion receives and demodulates the light emitted from the light emitting portion in sync with an emission of the light emitting portion. In this way, the coin selection device detects a coin passing through the coin path portion.
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