Abstract: Provided is a driver configured to be capable of filling gas suitable for a set pressure of a pressure chamber. This driver is provided with: a pressure chamber into which gas is filled; a striker moved in a first direction D1 by pressure of the pressure chamber to strike nails; and an electric motor and a pin wheel, which move the striker in a second direction opposite to the first direction to increase the pressure of the pressure chamber. A pressure regulator for regulating the pressure of the gas filled into the pressure chamber is dedicated for the driver, and the driver is provided with a mounting hole dedicated for the pressure regulator.

Abstract: Provided is a driver configured to be capable of filling gas suitable for a set pressure of a pressure chamber. This driver is provided with: a pressure chamber into which gas is filled; a striker moved in a first direction D1 by pressure of the pressure chamber to strike nails; and an electric motor and a pin wheel, which move the striker in a second direction opposite to the first direction to increase the pressure of the pressure chamber. A pressure regulator for regulating the pressure of the gas filled into the pressure chamber is dedicated for the driver, and the driver is provided with a mounting hole dedicated for the pressure regulator.

Abstract: The disclosure provides a work tool having an electric motor, a power transmission means that receives motive power from the electric motor and transmits the motive power to a tip tool, a gear housing for accommodating at least a portion of the power transmission means, weights swingably supported on the gear housing, and coil springs that function as an urging means for urging the weights such that the weights are located at an initial neutral position, wherein the weights and the coil springs are provided respectively on the two sides of the gear housing so as to put the power transmission means therebetween, and a rotational support axle is provided that functions as a connecting means for connecting the weights provided on both sides of the gear housing so as to connect the weights such that the weights swing integrally.

Abstract: Provided is a reciprocating work machine capable of further reducing vibration transmitted from a housing to a handle. The reciprocating work machine provided with an electric motor, a piston and a striker reciprocating by power of the electric motor and striking a tool, and a housing accommodating the electric motor, the piston, and the striker, includes: a resin handle operably connected to the housing; a spring provided between the housing and the handle and expanding and contracting in a reciprocating direction of the piston and the striker when the handle operates relative to the housing; and a weight provided to the handle and made of a material having a specific gravity higher than each of a specific gravity of a material constituting the handle and a specific gravity of a material constituting the housing.

Abstract: The disclosure provides a work tool having an electric motor, a power transmission means that receives motive power from the electric motor and transmits the motive power to a tip tool, a gear housing for accommodating at least a portion of the power transmission means, weights swingably supported on the gear housing, and coil springs that function as an urging means for urging the weights such that the weights are located at an initial neutral position, wherein the weights and the coil springs are provided respectively on the two sides of the gear housing so as to put the power transmission means therebetween, and a rotational support axle is provided that functions as a connecting means for connecting the weights provided on both sides of the gear housing so as to connect the weights such that the weights swing integrally.