| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water flow switch capable of stably detecting that water is flowing, even in an unstable water flow containing bubbles.SOLUTION: Within a water passage, a turning plate is pivoted in a rotatable manner, and a detection switch is provided of which the ON/OFF state is changed with a turning motion of the turning plate. The turning plate includes a movable weight which is movable with turning of the turning plate and when the turning plate turns by receiving a water flow, the movable weight is moved closer to a turning axis of the turning plate. Thus, since the center of gravity of the turning plate gets closer to the turning axis by moving the movable weight towards the turning axis than before the moving, a moment of turning the turning plate in a returning direction is reduced. Thus, even if power of a water flow is weakened, the turning plate can be prevented from being returned. As a result, even in an unstable water flow containing bubbles, a state of the detection switch is kept, thereby stably detecting that water is flowing.</p> |
