| 摘要 |
PURPOSE: A water level sensing device for a device using water is provided to protect a coil through improving an assembly structure without injecting and to solve a problem in which costs for manufacturing a water level sensing device is increased by using an injection device. CONSTITUTION: A water level sensing device for a device using water comprises a driving unit(100), a bobbin(300), an output unit(400), a casing(500), and a sealing unit. The driving unit moves a core by receiving force corresponding to the quantity of water used for a device using the water. The bobbin comprises a cylinder unit, a coil, a disc unit, and a projected bar. The cylinder unit accommodates the core. The disc unit is extended to a radial direction in the outside of the cylinder unit. The projected bar is projected to a direction becoming far from the cylinder unit. The output unit comprises a circuit substrate, a condenser, and a terminal. Both end portions are electrically connected to the circuit substrate. The condenser is electrically connected to the coil, thereby outputting oscillation frequencies becoming varied by inductance variations of the coil. The terminal outputs the oscillation frequencies as oscillation signals.
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