Abstract: A waterproof lever switch, for use in various kinds of electric systems for an automobile engine, door, etc., includes: a waterproof ring made of synthetic rubber and attached in first and second circumferential grooves formed opposite each other in a disk part of a lever and a base, respectively, to form a watertight space between first and third approximately circularly-shaped recesses formed inside of both first and second circumferential grooves, an appropriate switch mechanism being mounted in the watertight space. The lever includes a lever part and the disk part and is rotatably mounted at a set angle on the base. The first circumferential groove is formed in an inner face of the disk part of the lever. The first approximately circularly-shaped recess is formed inside the first circumferential groove. A second approximately circularly-shaped recess is rotatably engaged at a set angle with the disk part of the lever and is formed in a surface of the base.

Abstract: A microswitch is provided with a push lever having a ball at a lower end so as to roll freely. A seesaw contact piece has one side piece to which a movable contact is attached and an opposite side piece to which the ball of the push lever is in constant contact when external force is not applied to the push lever. A fixed contact switches ON by coming into contact with the movable contact and switches OFF by separating from the movable contact. A fixed contact piece is configured to support a comer part of the seesaw contact piece.