Abstract: A power tool includes a brake assembly including a swing member swingable about a pivot at an axial center decentered from a center of a brake member, a press member held by the swing member to come in contact with the brake member in response to the swing member swinging, and a spring having an axial center at a second decentered position opposite to the pivot with the center of the brake member between the axial center and the pivot. The axial center is on a second line orthogonal to a first line extending through the center of the brake member and the pivot. The spring has an elastic movable end in contact with an end of the swing member to urge the swing member to a position at which the press member is in contact with the brake member with a switch being in an off state.

Abstract: A power tool includes a housing, a handle, and a connector. The housing includes a housing-side coupling portion having conductive properties. The handle includes a conductive handle-side coupling portion, a detecting portion capable of detecting a detection value, a handle-side conducting portion electrically connected to the detecting portion, and an insulating portion that electrically insulates the handle-side coupling portion from the handle-side conducting portion. The connector includes a main body portion having insulating properties, and a housing-side conducting portion attached to the main body portion and electrically connected to the detection circuit. In a state in which the handle-side coupling portion is coupled to the housing-side coupling portion, the handle-side conducting portion is electrically connected to the housing-side conducting portion, and the housing-side conducting portion is electrically insulated from the housing-side coupling portion by the main body portion.

Abstract: A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.

Abstract: A grinding tool facilitates wiring between a detector for an auxiliary handle and a controller. A grinding tool includes a motor, a housing including an inner housing accommodating the motor and an outer housing covering an exterior of the inner housing and extending rearward from the inner housing, a spindle protruding from a front of the housing, rotatable when driven by the motor, and including a protruding end to receive a tip tool, a controller that controls driving of the motor, a handle mount located at the front of the housing to receive an auxiliary handle in a detachable manner, a handle detector that electrically detects an attachment of the auxiliary handle to the handle mount, and wiring extending between the inner housing and the outer housing to electrically connect the controller and the handle detector.

Abstract: Heat generated during braking is reduced to prevent reduction in braking performance or the service life of the components. A grinder includes a housing, an operable member, a switch operable to be turned on or off in response to an operation on the operable member, a rotational shaft rotatable in response to an operation for turning on the switch, and a brake assembly that applies braking to the rotational shaft with the switch being in an off state and to release the braking applied to the rotational shaft in response to an operation for turning on the switch performed by the operable member. The brake assembly includes a brake member being circular and fixed to the rotational shaft, and multiple pressing members that press the brake member at multiple positions to apply a uniform force to the brake member from radially outward positions toward a center of the brake member.

Abstract: A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.

Abstract: A power tool is configured such that at least one accessory is mountable in a detachable manner. The power tool includes at least one camera and a determining part. The at least one accessory may be an auxiliary handle and/or a cover, which at least partially covers a tool accessory mounted on the power tool in a detachable manner. The determining part is configured to perform image processing on image data output from the at least one camera and to determine whether the state of the at least one accessory is normal based on at least whether the at least one accessory is mounted on the power tool.

Abstract: A blower includes a body having a main inlet opening and a discharge opening, a motor assembly housed in the body, and an auxiliary inlet opening. The motor assembly includes a case, a motor and a fan. The case has a first opening and a second opening. The motor is housed within the case. The fan is configured to rotate in response to driving of the motor to generate a flow of air passing the main inlet opening, the first opening, the motor, the second opening and the discharge opening in this order. A first space that communicates with the main inlet opening and the first opening of the case is formed within the body. The auxiliary inlet opening is configured to introduce the air from an outside of the body into the first space.

Abstract: A power tool includes a housing, a motor, a fan and a cyclone separation unit. The fan generates an air flow that flows in from first air inlets of the housing and passes through the housing. The cyclone separation unit has second air inlets arranged in a circumferential direction of the cyclone separation unit. The first and second air inlets are arranged apart from each other in an axial direction of the cyclone separation unit. A first dust collecting chamber is defined: (i) between the first air inlets and the second air inlets in the axial direction of the cyclone separation unit, and (ii) between an inner peripheral surface of the housing and the cyclone separation unit, and configured to collect dust by inertia force. A second dust collecting chamber is defined within the cyclone separation unit and configured to collect dust by centrifugal force.

Abstract: A grinder includes a locking assembly to lock a spindle in a head housing and has outlets with a large opening area for high cooling efficiency. A grinder includes a main housing accommodating a motor and a fan, a spindle, a locking assembly that locks rotation of the spindle, and a head housing including a joint connected to a front of the main housing, and a compartment accommodating the spindle and the locking assembly. The compartment is laterally less wide than the joint. The locking assembly is located at a middle in a lateral direction of the head housing. The joint has, in a portion of a front surface of the joint, a first outlet at least on a right or a left of the compartment to discharge air for cooling the motor generated from rotation of the fan.

Abstract: A nozzle includes a mounting part that is configured to be attached to a blower, and a body part that is connected to the mounting part. The body part has a discharge opening and a passage for air blown out by the blower. The passage leads to the discharge opening. The body part includes a flexible tube. The flexible tube has a length of at least 15 cm and defines at least a portion of the passage.

Abstract: A nozzle includes a mounting part that is configured to be attached to a blower, and a body part that is connected to the mounting part. The body part has a discharge opening and a passage for air blown out by the blower. The passage leads to the discharge opening. The body part includes a flexible tube. The flexible tube has a length of at least 15 cm and defines at least a portion of the passage.

Abstract: A blower includes a motor, a plurality of fans coaxially arranged in multiple stages, a housing having an inlet opening and a discharge opening, and a battery mounting part to which a battery is removably mountable. A rotational speed of the motor is within a range of 50,000 rpm to 120,000 rpm. A diameter of each of the fans is within a range of 30 mm to 70 mm. An area of the discharge opening is within a range of not less than an area of a circle having a diameter of 2.5 mm and not more than an area of a circle having a diameter of 10 mm. A blowing force of air discharged through the discharge opening is within a range of 1 N to 3 N.

Abstract: A power tool system includes at least one controlled device including a power tool, and a voice control device configured to wirelessly communicate with the at least one controlled device. The voice control device includes a at least one first processor configured to control operation of the at least one controlled device. The at least one first processor is configured to acquire voice data, and to control operation of the power tool in accordance with a command relating to the operation of the power tool and identified based on the voice data.

Abstract: A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.

Abstract: A power tool is configured such that at least one accessory is mountable in a detachable manner. The power tool includes at least one camera and a determining part. The at least one accessory may be an auxiliary handle and/or a cover, which at least partially covers a tool accessory mounted on the power tool in a detachable manner. The determining part is configured to perform image processing on image data output from the at least one camera and to determine whether the state of the at least one accessory is normal based on at least whether the at least one accessory is mounted on the power tool.

Abstract: A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.

Abstract: A blower includes a motor, a plurality of fans coaxially arranged in multiple stages, a housing having an inlet opening and a discharge opening, and a battery mounting part to which a battery is removably mountable. A rotational speed of the motor is within a range of 50,000 rpm to 120,000 rpm. A diameter of each of the fans is within a range of 30 mm to 70 mm. An area of the discharge opening is within a range of not less than an area of a circle having a diameter of 2.5 mm and not more than an area of a circle having a diameter of 10 mm. A blowing force of air discharged through the discharge opening is within a range of 1 N to 3 N.

Abstract: A power tool includes a brake assembly including a swing member swingable about a pivot at an axial center decentered from a center of a brake member, a press member held by the swing member to come in contact with the brake member in response to the swing member swinging, and a spring having an axial center at a second decentered position opposite to the pivot with the center of the brake member between the axial center and the pivot. The axial center is on a second line orthogonal to a first line extending through the center of the brake member and the pivot. The spring has an elastic movable end in contact with an end of the swing member to urge the swing member to a position at which the press member is in contact with the brake member with a switch being in an off state.

Abstract: A power tool includes an accessory and a reader. The accessory is configured to be attachable to and detachable from the power tool. The accessory includes a passive wireless tag. The reader includes at least one antenna and a reading part. The reading part is electrically connected to the at least one antenna. The reading part is configured to wirelessly communicate with the wireless tag via the at least one antenna and to read information stored in the wireless tag when the accessory is attached to the power tool.