| 摘要 |
A switching device includes a switch, a case within which the switch is accommodated, a cylindrical hollow section which is disposed on the upper surface of the case and has upper and lower openings to communicate with the inside of the case, an operation knob provided to cover the upper opening of the cylindrical section such that the operation knob can swing, and an operation bar penetrating through the lower opening of the cylindrical section and extending to the inside of the case so as to transmit the motion of the operation knob to the switch. A projection for preventing water from entering into the case is provided on the outside surface of the cylindrical section opposed to the inside surface of the operation knob.
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