Abstract: In a dust collection device attached to a hammer drill, a filter is provided in a dust box at a position at which the filter covers an outlet provided on a rear face of a lid body, in a state such that a filter surface projects into the dust box from the rear face of the lid body. A space is formed between an inner face of a box main body and a side face of the filter that is adjacent to the filter surface. Air outlets are provided to guide air, which flows in through an inlet, toward the space.

Abstract: In a power tool dust collecting device, a blocking ring that is subject to elastic deformation upon contact with a workpiece surface for blockage between a suction head and the workpiece surface is provided to the front surface of the suction head to be brought into contact with the workpiece surface. The blocking ring has a ventilating portion (a V-shaped slit) that ensures the flow of air to the suction head regardless of whether the elastic deformation has occurred.

Abstract: A technique for allowing a user to operate an operating member disposed in a front end region of a power tool in the state in which a dust collecting attachment designed to be attached to the front end region of the power tool is left attached to the power tool. The dust collecting attachment is used on a power tool having an operating member for removal and/or bit angle setting of a tool bit coupled to a front end region of a tool body. The dust collecting attachment has a dust collecting member which can be attached to the front end region of the tool body. The dust collecting member has an opening formed in a region which faces the operating member in the state in which the dust collecting member is attached to the tool body, and the operating member can be operated by user's finger through the opening.

Abstract: A dust collecting device is provided which is capable of preventing static charge while rationally collecting dust generated during operation. A dust collecting device is removably attached to a power tool and can be carried together with the power tool, and collects dust generated when a predetermined operation is performed on a workpiece by driving a tool bit coupled to the power tool. Further, the dust collecting device has a dust suction region that sucks dust generated during operation in response to the operation of the tool bit, a dust transfer region that transfers the dust sucked in the dust suction region, and a dust storage region that communicates with the dust transfer region and stores the dust. Furthermore, the dust collecting device has a grounding member through which static charge on the dust is dissipated.

Abstract: An effective technique for increasing performance of an auxiliary handle which is attached to a power tool is provided. The auxiliary handle has a grip part, a grip holding part, a mounting part and a support part. The grip holding part is disposed between the grip part and the support part in a longitudinal direction of the auxiliary handle. When the auxiliary handle is attached to a power tool body, the grip part and the grip holding part are held so as to be movable with respect to the mounting part with the support part as a fulcrum.

Abstract: Reciprocating power tool is provided which is improved in vibration isolation of the handle. The reciprocating power tool has a tool body and a handle connected to the tool body. When an axial direction of a tool bit is defined as a longitudinal direction, the handle extends in a vertical direction crossing the longitudinal direction. Further, an upper region of the handle is connected to the tool body via an elastic member and a lower region of the handle is connected to the tool body via a support shaft that it can rotate around an axis of the support shaft in a transverse direction crossing both the longitudinal direction and the vertical direction with respect to the tool body. When the handle rotates around the support shaft with respect to the tool body, the elastic member reduces vibration which is caused in the tool body and transmitted to the handle.

Abstract: A power tool dust collecting device includes a fan chamber and a dust collecting chamber. The fan chamber is formed in a housing which is mountable on a hammer drill and in which a suction opening is provided protrudingly. The fan chamber houses a fan that rotates in accordance with driving of a motor. The dust collecting chamber is formed on an upstream side of the fan chamber. Mounted on the dust collecting chamber is a filter through which passes air that has been sucked up from the suction opening by the rotation of the fan and which collects dust included in the air. An air pumping unit that pumps air from a downstream side of the filter toward an upstream side is provided inside the housing.

Abstract: In a hammer drill, a coil spring that urges a first clutch and a second clutch in directions away from each other is held between a first change plate that engages with the first clutch to be slidable in the axial direction of an intermediate shaft and a second change plate that engages with the second clutch to be slidable in the axial direction of the intermediate shaft. The first change plate is slidably guided by a gear housing.

Abstract: A technique is provided which improves durability in a power tool having a torque transmission device. The representative power tool has a torque transmission device 151. The torque transmission device 151 includes a projection 171 formed on one of opposed surfaces of a first rotating member 153 and a second rotating member 155 and protruding in a direction of a rotational axis, a recess 161 for receiving the projection 171, which is formed in the other of the opposed surfaces and recessed in the direction of the rotational axis, a projection-side engagement surface 175a formed on the projection 171, and a recess-side engagement surface 165a formed on the recess 171. Torque is transmitted when the projection-side and recess-side engagement surfaces 175a, 165a are engaged with each other, while the torque transmission is interrupted when the projection-side and recess-side engagement surfaces 175a, 165a are disengaged from each other.

Abstract: A hammer drill is provided with a connector equipped with a female terminal, movably between a connection position where the female terminal is located inside a plug-in port and a non-connection position where the female terminal is in retreat from inside the plug-in port. The hammer drill is also provided with a torsion spring that urges the connector toward the non-connection position. The connector is provided with a shutter portion that is located inside the plug-in port to close the plug-in port at the non-connection position and is in retreat from inside the plug-in port at the connection position. A dust collecting device is provided with a press rail that comes into abutment on the connector to move the connector to the connection position against the urging of the torsion spring as the dust collecting device is mounted.

Abstract: A power tool dust collecting device includes, in a housing in which a suction opening is protrudingly provided and on which a power tool is mountable, a motor chamber holding a motor having a brush that comes into sliding contact with a commutator of a rotor rotating integrally with an output shaft, a fan chamber housing a dust collecting fan attached to the output shaft of the motor, and a dust collecting chamber in which a filter, through which passes air sucked up from the suction opening due to rotation of the dust collecting fan in accordance with driving of the motor and which collects dust in the air, is mounted on an upstream side of the fan chamber. A cushioning member is interposed between an inner wall of the motor chamber and an outer peripheral surface of the motor.

Abstract: In a power tool dust collecting device, a blocking ring that is subject to elastic deformation upon contact with a workpiece surface for blockage between a suction head and the workpiece surface is provided to the front surface of the suction head to be brought into contact with the workpiece surface. The blocking ring has a ventilating portion (a V-shaped slit) that ensures the flow of air to the suction head regardless of whether the elastic deformation has occurred.

Abstract: A dust collecting device is provided which is capable of preventing static charge while rationally collecting dust generated during operation. A dust collecting device 120 is removably attached to a power tool 101 and can be carried together with the power tool 101, and collects dust generated when a predetermined operation is performed on a workpiece by driving a tool bit 119 coupled to the power tool 101. Further, the dust collecting device 120 has a dust suction region 131 that sucks dust generated during operation in response to the operation of the tool bit 119, a dust transfer region 137 that transfers the dust sucked in the dust suction region 131, and a dust storage region 141 that communicates with the dust transfer region 137 and stores the dust. Furthermore, the dust collecting device 120 has a grounding member 147 through which static charge on the dust is dissipated.

Abstract: A power tool dust collecting device includes a fan chamber and a dust collecting chamber. The fan chamber is formed in a housing which is mountable on a hammer drill and in which a suction opening is provided protrudingly. The fan chamber houses a fan that rotates in accordance with driving of a motor. The dust collecting chamber is formed on an upstream side of the fan chamber. Mounted on the dust collecting chamber is a filter through which passes air that has been sucked up from the suction opening by the rotation of the fan and which collects dust included in the air. An air pumping unit that pumps air from a downstream side of the filter toward an upstream side is provided inside the housing.

Abstract: An impact tool in which a tool body can be effectively reduced in size is provided. The impact tool has a motor 111, a swinging member 129 that is driven by the motor 111 and swings in the axial direction of the tool bit, a striking mechanism 115 that is driven by components of linear motion in the axial direction of the tool bit in the swinging motion of the swinging member 129, a connecting part 124 that connects the swinging member 129 and the striking mechanism 115, a housing member 151 that houses at least the connecting part 124 in an internal space 156, and a counter weight 155 that is disposed within the internal space 156 of the housing member 151 and reduces vibration caused when the tool bit is driven.

Abstract: In a dust collection device attached to a hammer drill, a filter is provided in a dust box at a position at which the filter covers an outlet provided on a rear face of a lid body, in a state such that a filter surface projects into the dust box from the rear face of the lid body. A space is formed between an inner face of a box main body and a side face of the filter that is adjacent to the filter surface. Air outlets are provided to guide air, which flows in through an inlet, toward the space.

Abstract: A hammer drill includes a dust collector engaged with a housing by sliding. An engagement protrusion, which can engage and disengage with a rear engagement recessed portion provided on a guide groove of the housing, is provided at a position where the dust collector engages with the housing and biased in the direction of engagement with the rear engagement recessed portion. A front engagement recessed portion is also provided on the guide groove, and can engage with the engagement protrusion at a slide position of the dust collector in front of the engagement position. By engaging the engagement protrusion with the front engagement recessed portion, the dust collector can be fixed to the housing even at the slide position.

Abstract: A technique is provided which improves durability in a power tool having a torque transmission device. The representative power tool has a torque transmission device 151. The torque transmission device 151 includes a projection 171 formed on one of opposed surfaces of a first rotating member 153 and a second rotating member 155 and protruding in a direction of a rotational axis, a recess 161 for receiving the projection 171, which is formed in the other of the opposed surfaces and recessed in the direction of the rotational axis, a projection-side engagement surface 175a formed on the projection 171, and a recess-side engagement surface 165a formed on the recess 171. Torque is transmitted when the projection-side and recess-side engagement surfaces 175a, 165a are engaged with each other, while the torque transmission is interrupted when the projection-side and recess-side engagement surfaces 175a, 165a are disengaged from each other.

Abstract: The invention is to provide a hammer drill which is to be capable of restricting rotation of a bit in a hammer mode, and improve usability. A hammer drill includes a lock plate 51 in a housing 2, and the lock plate 51 engages with a second gear 31 so as to lock rotation of the second gear. The lock plate 51 is provided to be slidable between an engaging position with the second gear 31 and a non-engaging position, and is biased to the engaging position by a coil spring. The hammer drill further includes a restriction part 50 on an outer peripheral side of a holding tube 46 in a mode switching knob 44. The restriction part 50 abuts the lock plate 51 in one of two phases for engaging a clutch 37 with only a boss sleeve 32 so as to hold the lock plate 51 at the non-engaging position, and cancels the abutment with the lock plate 51 in the other phase to slide the lock plate 51 to the engaging position.

Abstract: A hammer drill is provided with a connector equipped with a female terminal, movably between a connection position where the female terminal is located inside a plug-in port and a non-connection position where the female terminal is in retreat from inside the plug-in port. The hammer drill is also provided with a torsion spring that urges the connector toward the non-connection position. The connector is provided with a shutter portion that is located inside the plug-in port to close the plug-in port at the non-connection position and is in retreat from inside the plug-in port at the connection position. A dust collecting device is provided with a press rail that comes into abutment on the connector to move the connector to the connection position against the urging of the torsion spring as the dust collecting device is mounted.