Abstract: A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body.

Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The housing has an upper side portion and a lower side portion. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed on the upper side portion and at a position higher than the motor and configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and to supply the motor with alternate-current power.

Abstract: A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsaw 1 including: a saw chain 6 driven by a motor embedded in a main body; and an oil tank 11 in which the chain oil to be supplied to the saw chain 6 in wood cutting process is stored, an illumination unit (LED 15) is provided in vicinity of the oil tank 11. In this manner, the chain oil of the oil tank 11 positioned on a left side of the LED 15 can be illuminated. This illumination unit is configured to be used also as an illuminating device for illuminating the vicinity of the saw chain 6, that is, an area indicated by dotted lines from 21c to 21d. According to the present invention, in a dark location, the remaining amount of the chain oil can be checked, and besides, a positional relationship among the chainsaw 1 main body, the saw chain 6, and the periphery thereof can be easily visually checked, so that the working efficiency can be improved.

Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed outside the housing and is configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and supplies the motor with alternate-current power.

Abstract: A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsaw 1 including: a saw chain 6 driven by a motor embedded in a main body; and an oil tank 11 in which the chain oil to be supplied to the saw chain 6 in wood cutting process is stored, an illumination unit (LED 15) is provided in vicinity of the oil tank 11. In this manner, the chain oil of the oil tank 11 positioned on a left side of the LED 15 can be illuminated. This illumination unit is configured to be used also as an illuminating device for illuminating the vicinity of the saw chain 6, that is, an area indicated by dotted lines from 21c to 21d. According to the present invention, in a dark location, the remaining amount of the chain oil can be checked, and besides, a positional relationship among the chainsaw 1 main body, the saw chain 6, and the periphery thereof can be easily visually checked, so that the working efficiency can be improved.

Abstract: A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated.

Abstract: A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body.

Abstract: A chain saw has a drive shaft which drives the saw chain, an electric motor which imparts a rotational force to the drive shaft, a main body housing which incorporates the electric motor, a battery which is detachably attached to the main body housing, a battery guard which supports a bottom surface of the battery, and a hook which is provided in a hook accommodating portion on a bottom surface side of the battery guard so as to be freely drawn out to the rear. A pillar-like portion is formed within the battery guard in a position lying further forwards than the hook accommodating portion, and bent-back portions of the hook are brought into engagement with the pillar-like portion.

Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The housing has an upper side portion and a lower side portion. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed on the upper side portion and at a position higher than the motor and configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and to supply the motor with alternate-current power.

Abstract: The present invention provides a power tool that can be used at a position away from the external power source. The power tool includes a housing, a motor, an end tool, a battery pack, and an inverter. The motor is supported by the housing and driven by alternate-current power. The end tool is supported by the housing and rotatably driven by the motor. The battery pack outputs direct-current voltage. The inverter is disposed outside the housing and is configured to convert the direct-current voltage outputted from the battery pack into alternate-current voltage and supplies the motor with alternate-current power.

Abstract: A lawnmower comprises a chassis having wheels (front wheels, a rear wheel) and capable of moving at least in a predetermined forward direction; a motor provided on the chassis, having a rotor, a stator and an output shaft and positioned with the axial line of the output shaft substantially vertical; a rotary blade connected to the output shaft; a handle arranged separated from the chassis; and a connecting piece (retractable pipes) connecting the chassis and the handle. The rotor comprises coil disks that have a plurality of annular coils arranged in a circumferential direction about the output shaft as viewed from the direction of the axial line of the output shaft. The stator comprises a magnetic flux generation mechanism that generates magnetic flux passing through the coil disks in the direction of the axial line of the output shaft.