A trigger mechanism used in a power tool is disclosed to include a grip including a mounting chamber and two opposing first guide portions, and a tripper, which is mounted in the mounting chamber of the grip and movable by an external force along an axis direction relative to the grip and includes two opposing second guide portions respectively coupled to the first guide portions of the grip for enabling the trigger to move moved along the axis direction relative to the grip in a stable and smooth manner.

A tool includes a switch and a handle. The switch is configured to cause an electric component to operate. The handle is held by a hand to manipulate the switch. The switch includes a switch manipulation part to be manipulated, a load sensor, a sealing cover and a preventing member. The load sensor is configured to receive a pressing force through the switch manipulation part. The sealing cover includes an elastic material which is deformable when receiving the pressing force through the switch manipulation part, and is configured to press the load sensor. The preventing member is configured to seal an internal space between the sealing cover and the load sensor, around the load sensor.

A switch assembly is adapted to be disposed in a holding portion of a hand-held device. The switch assembly includes first and second keys, first and second connecting portions, a switch element and a plunger. The first and second keys are exposed on the surface of the holding portion and respectively disposed on the opposite sides thereof. The first and second connecting portions respectively connect the first and second keys and the holding portion. The first and second connecting portions are disposed for allowing the first key having a displacement toward the second key along their connecting direction. The switch element is located inside of the holding portion, and the first key has a first backside toward the second key. The second key has a second backside toward the first key. The plunger is adapted to press and activate the switch element through the displacement.

A switch assembly is adapted to be disposed in a holding portion of a hand-held device. The switch assembly includes first and second keys, first and second connecting portions, a switch element and a plunger. The first and second keys are exposed on the surface of the holding portion and respectively disposed on the opposite sides thereof. The first and second connecting portions respectively connect the first and second keys and the holding portion. The first and second connecting portions are disposed for allowing the first key having a displacement toward the second key along their connecting direction. The switch element is located inside of the holding portion, and the first key has a first backside toward the second key. The second key has a second backside toward the first key. The plunger is adapted to press and activate the switch element through the displacement.

A switch device for a vehicular air conditioning system includes a transverse wing surrounded by a knob of an air vent. A circuit board is mounted to an inner side of the transverse wing. The button switch for controlling an air conditioner and an air amount is connected to a switch contact portion of the circuit board to contact the switch contact portion of the circuit board and mounted to an upper surface of the knob. A connector connects a connecting portion formed at a rear portion of the circuit board and an air conditioning controller.

A switch device for a vehicular air conditioning system includes a transverse wing surrounded by a knob of an air vent. A circuit board is mounted to an inner side of the transverse wing. The button switch for controlling an air conditioner and an air amount is connected to a switch contact portion of the circuit board to contact the switch contact portion of the circuit board and mounted to an upper surface of the knob. A connector connects a connecting portion formed at a rear portion of the circuit board and an air conditioning controller.

A transmission shift lever mounted controller for a snow plow or winch for a motor vehicle. The controller may be made of a flexible housing that slips over the top of the transmission shift lever as a cover. The controller carries switches to control the plow or winch on the transmission shift lever. This allows the operator to control both the snow plow or winch and the transmission shift lever at without having to move his/her hand back and forth between the two. The controller also allows control of the snow plow or winch and the transmission shift lever simultaneously.

A trigger switch includes: a housing, housed in a main unit; a trigger, accepting a push operation with a part located outside the housing, and moving when pushed by the push operation and when the push operation is released; and an energizing member, energizing the trigger in an opposite direction to the push operation, and is capable of being incorporated into the main unit. The energizing member energizes the trigger in an opposite direction to the push operation at one end side located outside the housing, and has other end side fixed inside the housing.

A trigger switch includes: a housing, housed in a main unit; a trigger, accepting a push operation with a part located outside the housing, and moving when pushed by the push operation and when the push operation is released; and an energizing member, energizing the trigger in an opposite direction to the push operation, and is capable of being incorporated into the main unit. The energizing member energizes the trigger in an opposite direction to the push operation at one end side located outside the housing, and has other end side fixed inside the housing.

An electrical switch unit for use in controlling operation of an electrical device, the electrical switch unit including: an electrical switch unit housing for housing at least a pair of electrical switching contacts of the electrical switch unit, said electrical switch unit housing including a first housing member and a second housing member that are configured for attachment together at peripheral regions of the first and second housing members so as to cooperatively form an enclosed space for housing the pair of electrical switching contacts therein; an actuator member operably-connected with at least one of the pair of electrical switching contacts, the actuator being configured for movement relative inwardly and outwardly of an opening in the electrical switch unit housing so as to arrange the pair of electrical switching contacts into at least one of a closed configuration wherein power is able to be supplied from a power source to motor or other electrically-operable element of the electrical device via the pair of electrical switching contacts, and, an opened configuration wherein power is not able to be supplied from the power source to the motor or other electrically-operable element of the electrical device via the pair of electrical switching contacts; and an sealing element including an elastically-resilient polymeric material, said sealing element being configured for location between the first and second housing members and extending about the peripheral regions of the attached first and second housing members so as to occlude passage and ingress of particulates and water into the electrical switch unit housing.