Patent ID: 8653388

Claim:
A switch device for a power tool, comprising: a switch case; a switch lever including an operation portion operable by an operator, an actuation portion inserted into the switch case, and a rotative portion; and a seal member fitted on the rotative portion for waterproofing an inside of the switch case, wherein the operation portion and the actuation portion are connected to the rotative portion, so that the operation portion and the actuation portion extend substantially perpendicular to an axial direction of the rotative portion at different positions along the axial direction of the rotative portion, the switch case has a support portion rotatably supporting the rotative portion of the switch lever, a recess is formed in the rotative portion along an entire circumference of the rotative portion, the seal member is fitted into the recess to form a labyrinth between the seal member and the rotative portion, the recess includes a first recess and a second recess, the seal member has opposite end portions fitted into the first recess and the second recess, respectively, the first recess and the second recess are each comprised of a first wall, a second wall, and third wall, and the first wall is parallel to the second wall.