| 摘要 |
PURPOSE: A micro switch is provided to prevent permeation of water or oil into combining parts between an upper case and a lower case of the micro switch by combining the upper case with the lower case by ultrasonic waves. CONSTITUTION: A contact point and a movable section are formed in a lower case(20) in order to control current. An upper case(10) is firmly combined with the lower case(20) in order to prevent permeation of water or oil into combining parts between the upper case(10) and the lower case(20). The combining parts is firmly combined by using ultrasonic waves. The upper case(10) and the lower case(20) are formed by nylon 66 of G.F 15%. An operating portion(30) is formed by one of a roller level type, a plunger type, a ball type, and a hinge type. A terminal bolt(40) is used for connecting circuits to each other.
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