Patent ID: 8089019
Filing Date: 2012-01-03
Classification: H01H

Abstract:
1. A trigger switch comprising: a switching operation unit configured to control the rotation of a motor between a normal rotation and a reverse rotation; a sliding operation unit configured to be coupled to a trigger lever, a case configured to store the switching operation unit and the sliding operation unit; a cover configured to close an opening surface of the case, the switching operation unit being partly built into an upper position of the case, and including a switching contact strip formed of a conductive metallic member which generates switching signals on a side surface of a rear end portion thereof, and a switching lever having a revolving shaft rotatably provided at a substantially center position, the sliding operation unit being partly build into a lower position of the case, and including a speed control unit having sliding elements which is configured to move in association with the operation of the trigger lever, and a sliding shaft coupled at a rear end to the speed control unit and allows the trigger lever to be mounted on a distal end portion thereof, the cover including a sliding circuit board having contact elements on which the sliding elements slide, wherein the case is formed with a speed control unit storage chamber configured to store the speed control unit, a revolving shaft storage chamber configured to store the revolving shaft of the switching lever, and a contact strip member storage chamber provided with continuing from the revolving shaft storage chamber through a shielding member therebetween and configured to store the contact strip member of the switching lever, the revolving shaft storage chamber is formed with a revolving shaft engaging hole configured to allow the revolving shaft to be inserted in an engaged state on an upper portion thereof on the side of the trigger lever, and a waterproof device configured to cover at least a gap between the switching lever and the revolving shaft engaging hole is provided to prevent entry of water therein.