Working machine
A working machine may include a working unit, a prime mover configured to drive the working unit, a housing that supports the working unit and houses the prime mover, a trigger lever extending through a through hole defined in the housing so as to be located inside and outside the housing and configured to be manipulated by a user, a sensor configured to detect a movement of the trigger lever, and a control unit configured to control the prime mover based on a detection result by the sensor. The trigger lever may be rotatably supported by the housing via a rotation shaft. The trigger lever may include a block portion that has a shape of a substantially solid of revolution about a rotation axis of the trigger lever. A peripheral edge of the through hole may include a facing edge that faces an outer circumferential surface of the block portion.
1 . A working machine, comprising:
a working unit;
a prime mover configured to drive the working unit;
a housing that supports the working unit and houses the prime mover;
a trigger lever, extending through a through hole defined in the housing, so as to be located inside and outside the housing, wherein the trigger lever includes a manipulation portion outside the housing which is configured to be manipulated by a user, and the trigger lever includes a detection portion inside the housing;
a sensor disposed inside the housing and configured to detect a movement of the detection portion of the trigger lever located inside the housing; and
a control unit configured to control the prime mover based on a detection result by the sensor,
wherein
the trigger lever is rotatably supported by the housing via a rotation shaft,
the trigger lever includes a block portion that has a shape of a solid cylinder that is centered on a rotation axis of the trigger lever, wherein the manipulation portion extends from the block portion and the detection portion extends from the block portion, and
a peripheral edge of the through hole includes a facing edge that faces an outer circumferential surface of the block portion.
2 . The working machine according to claim 1 , wherein
the block portion is arranged to block substantially an entirety of the through hole,
the manipulation portion has a rod shape.
3 . The working machine according to claim 2 , wherein
a direction in which the through hole opens from inside of the housing to outside of the housing is opposite to a direction from the through hole to the working unit,
the sensor includes at least one of a magnetic sensor and a microswitch,
a rotational movement of the trigger lever relative to the housing is limited within a predetermined movable range,
the trigger lever rotates by 45 degrees or less while the trigger lever rotates from one end of the movable range to other end of the movable range,
a part of an outer circumference of the block portion that is exposed outside of the housing through the through hole while the trigger lever is rotating from one end of the movable range to other end of the movable range is defined as an exposed portion,
an angular range of the exposed portion in a circumferential direction of the rotation axis is 90 degrees or more, and
the working unit is configured to perform a cutting operation to cut an object.
4 . The working machine according to claim 1 , wherein a direction in which the through hole opens from inside of the housing to outside of the housing is opposite to a direction from the through hole to the working unit.
5 . The working machine according to claim 1 , wherein the sensor includes at least one of a magnetic sensor and a microswitch.
6 . The working machine according to claim 1 , wherein
a rotational movement of the trigger lever relative to the housing is limited within a predetermined movable range, and
the trigger lever rotates by 45 degrees or less while rotating from one end of the movable range to other end of the movable range.
7 . The working machine according to claim 1 , wherein
the block portion is arranged to block substantially an entirety of the through hole,
the manipulation portion has a rod shape,
a rotational movement of the trigger lever relative to the housing is limited within a predetermined movable range,
a portion of an outer circumference of the block portion that is exposed outside of the housing through the through hole while the trigger lever is rotating from one end of the movable range to other end of the movable range is defined as an exposed portion, and
an angular range of the exposed portion in a circumferential direction of the rotation axis is 90 degrees or more.
8 . The working machine according to claim 1 , wherein the working unit is configured to perform a cutting operation to cut an object.
9 . The working machine according to claim 1 , wherein a clearance is formed between the facing edge and the outer circumferential surface of the block portion, and a size of the clearance is maintained constant during rotation of the trigger lever.