A trigger assembly for use with an electrical device, said electrical device having an electric switch housing with an electrical switch unit disposed therein, the trigger assembly including; a trigger member configured for movement relative to the housing; an actuator member operably-connected to the trigger member and, responsive to movement of the trigger member relative to the housing, said actuator member being movable in a first direction relative to the housing from an OFF position in which the electrical switch is operably-opened by the actuator towards an ON position in which the electrical switch is operably-closed by the actuator, and movable in a second direction relative to the housing from the ON position towards the OFF position; a lock-on mechanism including a first locking member mounted proximate to the trigger member and a second locking member mounted proximate to the housing, wherein when the actuator member is moved in to the ON position, said first and second locking members are selectably movable relative to each other into at least one of a locked configuration whereby the actuator member is locked in the ON position, and, an unlocked configuration whereby the actuator member is not locked in the ON position; and a lock-off mechanism including a lock-off member disposed on the trigger member, said lock-off member being rotatably movable about a first rotation axis between at least one of a locked-off position in which the lock-off member restricts movement of the trigger member relative to the housing and whereby the actuator member is restricted from being moved from the OFF position in to the ON position, and, a non-locked-off position in which the lock-off member does not restrict movement of the trigger member relative to the housing and whereby the actuator member is not restricted from being moved from the OFF position in to the ON position; and wherein the trigger assembly includes a shaped-portion disposed proximate to the housing wherein said shaped-portion is configured to abut against the lock-off member when the trigger member is moved towards the housing with the lock-off member rotatably arranged in to the locked-off position, whereby the actuator member is restricted from being moved from the OFF position in to the ON position.

A trigger arrangement for a scanning system can include a sealed housing configured to support a scanning device, a trigger, and an actuation device configured to control functionality of the scanning device. A first magnet can be positioned outside of the sealed housing and can be configured to be selectively moved by the trigger. A second magnet configured to be repelled by the first magnet can be positioned inside of the sealed housing. A connecting member that supports the second magnet can be configured to transfer force from the second magnet to the actuation device. Some configurations can provide tactile feedback to a user when the trigger is used.

A trigger assembly for use with an electrical device, including a trigger member, an actuator member operably-connected to the trigger member, and a lock-on mechanism for selectably restricting movement of the trigger member relative to the housing.

A trigger assembly for use with an electrical device, including a trigger member, an actuator member operably-connected to the trigger member, and a lock-on mechanism for selectably restricting movement of the trigger member relative to the housing.

A hand-held tool machine comprising a housing is disclosed wherein a motor for driving a tool as well as a switch for switching on and off the motor are received, including a switching arrangement having a switch that can be moved between a non-activated position and an activated position for activating the switch, and including a locking arrangement that can be moved between a blocking position and a release position, wherein the switch lever can only be moved into the activated position, when the locking arrangement is in the release position, and wherein the locking arrangement allows for a locking of the switch lever in the activated position, wherein the locking arrangement includes a slider that is received on the switch lever slidable between a locking position and a release position, wherein on the slider there is provided a blocking element cooperating with a counter element arranged at the housing for blocking a movement of the switch lever into the activated position when being in the blocking position and for allowing a movement of the switch lever into the activated position upon shifting the slider into the release position, and wherein on the slider there is provided a latching element that cooperates with a counter element on the housing for allowing a latching of the switch lever in the activated position.

A hand-held tool machine comprising a housing is disclosed wherein a motor for driving a tool as well as a switch for switching on and off the motor are received, including a switching arrangement having a switch that can be moved between a non-activated position and an activated position for activating the switch, and including a locking arrangement that can be moved between a blocking position and a release position, wherein the switch lever can only be moved into the activated position, when the locking arrangement is in the release position, and wherein the locking arrangement allows for a locking of the switch lever in the activated position, wherein the locking arrangement includes a slider that is received on the switch lever slidable between a locking position and a release position, wherein on the slider there is provided a blocking element cooperating with a counter element arranged at the housing for blocking a movement of the switch lever into the activated position when being in the blocking position and for allowing a movement of the switch lever into the activated position upon shifting the slider into the release position, and wherein on the slider there is provided a latching element that cooperates with a counter element on the housing for allowing a latching of the switch lever in the activated position.

An electric power tool has a tool receptacle and a tool housing in which a drive motor for driving the tool receptacle is arranged. The drive motor is switchable on and off via an electric switch. An operating part for indirectly actuating the switch is arranged on the tool housing and extends approximately parallel to a longitudinal axis of the tool housing. The operating part is lever-like and is pivotably arranged on the tool housing. An actuating member of the switch is displaceable approximately parallel to the longitudinal axis by an actuating force that acts on the operating part approximately perpendicularly to the longitudinal axis. The drive motor is switched on by the actuating force acting on the operating part against a restoring force of the switch, and the drive motor is switched off automatically, via the restoring force, when the operating part is released by a user.

An electric power tool has a tool receptacle and a tool housing in which a drive motor for driving the tool receptacle is arranged. The drive motor is switchable on and off via an electric switch. An operating part for indirectly actuating the switch is arranged on the tool housing and extends approximately parallel to a longitudinal axis of the tool housing. The operating part is lever-like and is pivotably arranged on the tool housing. An actuating member of the switch is displaceable approximately parallel to the longitudinal axis by an actuating force that acts on the operating part approximately perpendicularly to the longitudinal axis. The drive motor is switched on by the actuating force acting on the operating part against a restoring force of the switch, and the drive motor is switched off automatically, via the restoring force, when the operating part is released by a user.

Systems and methods for controlling a power trowel. A power trowel includes a handle including a speed control input, a housing, a shaft connecting the handle and the housing, a safety mechanism located on the shaft, a blade assembly positioned below the housing, a motor located within the motor housing and coupled to the blade assembly, and a controller. The safety mechanism includes a safety lever configured to move in response to an uncontrolled condition of the power trowel. The controller is connected to the motor and the safety mechanism. The controller is configured to drive, in response to actuation of the speed control input, the motor, detect a movement of the safety lever from a first position to a second position, and perform, in response to the movement of the safety lever to the second position, a safety operation.

Systems and methods for controlling a power trowel. A power trowel includes a handle including a speed control input, a housing, a shaft connecting the handle and the housing, a safety mechanism located on the shaft, a blade assembly positioned below the housing, a motor located within the motor housing and coupled to the blade assembly, and a controller. The safety mechanism includes a safety lever configured to move in response to an uncontrolled condition of the power trowel. The controller is connected to the motor and the safety mechanism. The controller is configured to drive, in response to actuation of the speed control input, the motor, detect a movement of the safety lever from a first position to a second position, and perform, in response to the movement of the safety lever to the second position, a safety operation.