Abstract: Provided is a rotary tool with a compact tip tool holding portion (80). The rotary tool is provided with a sleeve (81) attached to an output shaft (41) to switch a tip tool (70) between a fixed state and a detachable state. The output shaft (41) has a through hole (46) formed therein radially penetrating from the inside to the outside of a mounting hole thereof. The through hole (46) has a steel ball (85) provided therein such that at least a part of the steel ball (85) overlaps at least a part of a case (10). The sleeve (81) defines a first position in the outward direction of the steel ball (85), while the case (10) regulates a second position on the radially outer side of the first position.

Abstract: Provided is a router that suppresses a deterioration in stability. In the router 10, a battery holder 60 is provided on the upper side of a motor housing 33, and a battery 70 is detachably attached to the battery holder 60. Therefore, electric power can be supplied from the battery 70 to a motor 40 to drive the motor. Accordingly, convenience can be improved. Here, when viewed from a direction orthogonal to the vertical direction, an angle between a virtual line IL passing through an outer circumferential lower end of a base 20 and the center of gravity G of the router 10 and the lower surface of the base 20 is set to 80 degrees or less.

Abstract: Provided are an electric device and an electric device system. The electric device is provided with a battery pack attachment part, main LEDs, and a sub-LED. The main LEDs are lit by electric power from a battery pack. The sub-LED illuminates the battery pack attached to the battery pack attachment part or the battery pack attachment part. The sub-LED is lit when the voltage or capacity of the battery pack is below a predetermined value. The sub-LED is lit by electric power from a power supply part different from the battery pack.

Abstract: Provided is a user-friendly power tool. The power tool 1 comprises: a battery pack mount 2c to which a battery pack 4 can be attached and detached; and a cover 17 that can cover the battery pack 4, mounted on the battery pack mount 2c, and the battery pack mount 2c so as to allow opening and closing. The wall 23 of the battery pack mount 2c is provided with a correcting part 23a that is capable of correcting inward warping of both the left and right side surfaces of the cover 17, which are the longitudinal direction surfaces. The lower edge of the correcting part 23a has a rounded shape.

Abstract: Inside a case of a battery pack, the case being formed from an upper case and a lower case, battery cells are aligned in the longitudinal direction, with three battery cells stacked on the upper side and two stacked on the lower side. Portions of the end surfaces of the upper battery cells are supported in the axial direction by cell support parts formed integrally with the inner wall of the lower case. Similarly, portions of the end surfaces of the lower battery cells are supported in the axial direction by cell support parts formed integrally with the inner wall of the lower case. The cell support parts are formed independently from each other.

Abstract: An electric tool capable of achieving inhibition of reaction due to braking in good balance with inhibition of voltage jumping due to regenerated energy is provided. A grinder (1) is provided with a motor (6), an inverter circuit (43) for supplying electric current to the motor (6), and a controller (50) for controlling the inverter circuit (43). When generating an electric braking force on a motor (6), the rotation speed of which exceeds a specified rotation speed, the controller (50) performs a first braking control of continuously turning on lower arm-side switching elements (Q4-Q6) of the inverter circuit (43), after which the controller performs a second braking control of repeatedly turning on and off the lower arm-side switching elements (Q4-Q6).

Abstract: A driver capable of suppressing increase in a load torque of a motor when a striking mechanism is moved by the torque of the motor against a force of a first moving mechanism is provided. The driver includes a striking mechanism 12 movable in a first direction B1 and a second direction B2 opposite to the first direction B1 and a first moving mechanism configured to move the striking mechanism 12 in the first direction B1 to strike a fastener, and the driver further includes a motor, a second moving mechanism 45 rotated by the torque of the motor and configured to move the striking mechanism 12 in the second direction against a force of the first moving mechanism, and torque suppression mechanisms 45A to 45H configured to suppress increase in the torque of the motor when the striking mechanism 12 is moved in the second direction B2.

Abstract: Provided is a driving machine capable of stabilizing a relationship between timing when a first movable member starts operating in a first directing and timing when a second movable member starts operating in a second direction. The driving machine including a first movable member 12 operable in a first direction D1 and a second direction D2, and a second movable member 18 operable in the first direction D1 and the second direction D2 has a first regulating mechanism, a second regulating mechanism, and a third regulating mechanism 71, and the third regulating mechanism is held in a first state when the first movable member 12 is prevented from operating in the first direction D1, and the third regulating mechanism 71 switches from the first state to the second state when the first movable member 12 is allowed to operate in the first direction D1 and operates.

Abstract: A DC power supply device includes a housing including a wall portion, a first opening and a second opening, a circuit portion, a regulation wall portion, and a fan. The first and second openings are formed in the wall portion. The circuit portion includes first and second circuit elements those fixed within the housing. The regulation wall portion provide a first air passage in communication with the first opening, a second air passage in communication with the second opening, and a bent air passage allowing the first air passage and the second air passage to communicate with each other. The fan is configured to generate an air-flow flowing between the first air passage and the second air passage. The fan is positioned to face the first opening. The first circuit element is positioned in the first air passage. The second circuit element is positioned in the second air passage.

Abstract: Provided is an electrically powered tool having an improved sensor substrate mounting structure, the electrically powered tool being configured so that a brushless type motor is axially contained in a cylindrical housing. The electrically powered tool has: a cylindrical housing for axially containing a motor; a control unit for controlling the motor; and a sensor substrate having mounted thereon a plurality of position detecting elements for detecting the rotational position of a rotor. The sensor substrate is gripped between the insulator of the motor and the housing and held on the housing side when axially mounting the motor. The sensor substrate is annularly shaped and has formed at the center thereof a through-hole through which a bearing for the motor is passed. The portion of the sensor substrate, on which a Hall IC is mounted, is provided with a synthetic resin cover member for protecting the Hall IC against dust.

Abstract: A blower has: a fan generating an air flow in an axial direction of a rotary shaft; a tubular motor holder 30 formed in a tubular shape and holding the motor radially inside thereof; and a fan case part accommodating the motor, the motor holder, and the fan and forming an air flow path. A first rectification parts that is integrally formed is provided on an inside portion of the fan case part. The first rectification part is formed in a rib shape by a first to fourth blade, weakens a rotational component of a flow of air discharged from the fan, and guides the air to smoothly flow in the axial direction. The motor holder is configured so as to have an axial length smaller than the motor.

Abstract: A driver includes: a pressure chamber and a striking portion actuated in a direction of striking a fastener when compressed gas is supplied to the pressure chamber, and can select a single firing and a continuous firing; a switching mechanism having a first actuated state to actuate the striking portion in the direction when the single firing is selected and a second actuated state to block the striking portion from being actuated in the direction when the continuous firing is selected; and a control unit configured to switch the switching mechanism from the first actuated state to the second actuated state when a predetermined time elapses in a state where the continuous firing is selected and the switching mechanism is in the first actuated state. The control unit stops the power supply to the switching mechanism for at least part of a period of time when the predetermined time elapses.

Abstract: In the work device that has a self-holding circuit (61) maintaining power supply from a power supply circuit (12) by output from a microcomputer (40) and has a structure in which stopping output to the self-holding circuit (61) causes interruption of power supply from the power supply circuit (12) to the microcomputer (40), the firmware of the microcomputer (40) is made to be rewritable and a power holding unit (condenser C1) for temporarily continuing power supply to the microcomputer (40) is provided, thereby realizing a so-called “off-delay timer function” for restarting the microcomputer (40). This configuration enables maintenance of power to the microcomputer (40) after update of the firmware even in a work device that cannot be restarted once power has been turned off unless trigger operation is performed, thereby enabling automatic restart of the microcomputer 40 after resetting is enabled.

Abstract: A battery pack and an electric apparatus are provided. The battery pack is configured to be connectable to an electric apparatus main body of the electric apparatus. The battery pack includes: a first cell unit, including a first plurality of battery cells connected to each other, a first positive terminal, and a first negative terminal; a second cell unit, including a second plurality of battery cells connected to each other, a second positive terminal, and a second negative terminal; a microcomputer; and a casing, accommodating the first cell unit, the second cell unit, and the microcomputer. The first cell unit and the second cell unit are configured to be switched a connection state each other. The microcomputer is configured to be electrically connected to a positive terminal and a negative terminal of one of the first cell unit and the second cell unit and to be provided a power from the one of the first cell unit and the second cell unit.

Abstract: A reciprocating tool includes: a motor; a gear case; a converting mechanism; a plunger; a sealing member; and an auxiliary sealing member. The converting mechanism is accommodated in the gear case and configured to convert rotating motion of the motor into reciprocating movement in a predetermined direction. The plunger is provided with a mounting portion on which an end bit is mountable, and is reciprocally movably supported to the gear case. The plunger is driven by the converting mechanism to reciprocally move in the predetermined direction. The plunger is reciprocally movably inserted into the sealing member in the predetermined direction. The sealing member is supported by the gear case. The auxiliary sealing member is supported by the sealing member and sealing an outer peripheral surface of the plunger.

Abstract: A driver capable of improving a timing of feeding of a fastener to an injection unit is provided. In a driver including an injection unit to which a fastener is fed, and a striking unit configured to strike the fastener of the injection unit when moving from a first position to a second position, the driver further includes: an operational member operated by an operator; moving mechanisms that stop and move the striking unit when the operational member is operated; a feeder that feeds the fastener to the injection unit; and a power mechanism that stops the feeder during a period of stoppage of the striking unit and that moves the feeder to feed the fastener to the injection unit during a period from start of movement of the striking unit by the operation of the operational member to a moment before the striking of the fastener.

Abstract: A driver includes a pressure chamber, a striking portion, an operation member, and a contact member, and can select a first mode and a second mode. The driver further includes a first ventilation passage, a second ventilation passage, and opening/closing mechanisms. The opening/closing mechanisms have a first state to open the first ventilation passage and close the second ventilation passage in the first mode, a second state, when an operation force is applied to the operation member within a time from when the second mode is selected and the contact member contacts a workpiece, to close the first ventilation passage and open the second ventilation passage, and a third state, when an operation force is applied to the operation member within a time from when the second mode is selected and the contact member is separated from the workpiece, to close the second ventilation passage.

Abstract: An impact tool and method can include: a motor; a trigger; a controller configured to control driving power supplied to the motor using a semiconductor switching element according to an operation of the trigger; a striking mechanism configured to drive a tip tool continuously or intermittently by rotation force of the motor, the striking mechanism including a hammer and an anvil. The controller drives the semiconductor switching element at a high duty ratio when the trigger is manipulated. The motor can be driven so that the duty ratio is lowered before a first striking of the hammer on the anvil is performed and the first striking is performed at a low duty ratio lower than the high duty ratio.

Abstract: Providing an electric tool with excellent cooling efficiency. An electric tool includes: a housing 2; a motor 3; a fan 34; a sensing portion 41; a switching portion 42; and a circuit board 40. The motor 3 is accommodated in the housing 2. The motor 3 includes a stator 33, a rotor 32, and a rotating shaft 31. The rotor 32 is rotatable relative to the stator 33. The rotating shaft 31 is rotatable together with the rotor 32. The fan 34 is configured to generate a cooling air flow inside the housing 2. The sensing portion 41 is configured to detect a rotated position of the rotor 32. The switching portion 41 controls a rotation of the rotor 32. The sensing portion 41 and the switching portion 42 are mounted on the circuit board 40.