Disclosed is nail gun which fires nails stably, including: a housing, a trigger, an electric motor, a first cylinder, a second cylinder, a crank, a linkage, a nail firing assembly, and a nail supplying assembly, the second cylinder being disposed in the first cylinder, inside the first cylinder being provided a first piston, inside the second cylinder being provided a second piston, the linkage being in transmission connection with the first piston, the electric motor being in transmission connection with the crank via a transmission mechanism and driving, via the linkage, the first piston to make an axial motion in the first cylinder, a circulating air channel being provided between the first cylinder and the second cylinder, the nail firing assembly including a striker which is connected with the second piston.

A contact restriction member is configured to move from an unlock position to a lock position within a predetermined time period by using an intermittent rotation movement of a restriction wheel. The contact restriction member may prevent substantial movement of a contact arm when the contact restriction member is in the lock position.

A driving tool allows easy assembly and effective illumination of an area around a nozzle. A driving tool includes a striking mechanism that strikes a fastener, a body including the striking mechanism and an illuminator, a nozzle to allow ejection of the fastener struck by the striking mechanism, and a light guide between the illuminator and the nozzle.

A driver capable of suppressing an increase in a load of a bumper is provided. The driver 10 includes a striking portion 12 provided movably and configured to move to strike a fastener; a bumper 33 configured to be in contact with the striking portion 12 to restrict a range of movement of the striking portion 12; and a housing 11 configured to support the bumper 33, the driver 10 further including a load suppressing portion configured to suppress an increase in a load of the bumper 33 based on the load of the bumper 33 detected by a load detection portion or number of operations of the striking portion within a predetermined time.

A driving tool includes a tool body, a flywheel, a driver and a pressing mechanism. The pressing mechanism is disposed on a side opposite to the flywheel across the driver in a facing direction in which the flywheel and the driver face each other. The pressing mechanism includes a spring mechanism and a pressing roller. The spring mechanism includes a first spring part and a second spring part and is configured to be displaced along with forward movement of the driver. The pressing roller is configured to press the driver toward the flywheel in the facing direction by a biasing force of the spring mechanism in a process of the forward movement of the driver, to thereby enable transmission of the rotational energy to the driver. A spring constant of the whole spring mechanism varies according to an amount of displacement of the whole spring mechanism.

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.

A safety device for tackers includes a safety slide slidably connected to the outlet of the tacker and the safety slide has a stop protruding from the inside thereof. The rod has one end contacts the stop and the other end of the rod has a plastic tip connected thereto. An ignition spring is connected between the plastic tip and a safety switch. A recovery spring is connected to another position of the rod to position the rod. The safety slide is slidably connected to grooves of the tacker. When the safety slide contacts against an object to be stapled, the rod is pushed by the stop and activates the ignition spring to activate the safety switch so as to reduce the impact of the rod and the safety switch.

A method for controlling a nail-striking operation of an electric nail gun is proposed. The electric nail gun includes a control module and at least one switch. The at least one switch outputs a first switch signal that has a first voltage and a second switch signal that has a second voltage when triggered. The control module set a flag that corresponds to the at least one switch to a predetermined state upon determining that a striking condition is met. The striking condition includes that, for each of the at least one switch, the first switch signal has the first voltage and the second switch signal has the second voltage.

An electric nail gun includes a nail-striking subunit that is adapted to strike a nail, a lifting wheel that is movable to become engageable and not engageable with the nail-striking subunit, a driving member that is rotatable by a motor, and a transmission shaft that is movably connected between the driving member and the lifting wheel, and that is convertible between a first position, where the lifting wheel is engageable with the nail-striking subunit such that rotation of the driving member results in movement of the nail-striking subunit, and a second position, where the lifting wheel is not engageable with the nail-striking subunit such that rotation of the driving member does not result in movement of the nail-striking subunit.

A gas spring-powered fastener driver includes a cylinder, a storage chamber cylinder having pressurized air in communication with the cylinder, a moveable piston positioned within the cylinder, a driver blade extending from a first side of the piston and movable therewith between a top-dead-center position and a bottom-dead-center position, a one-way seal carried onboard the piston and disposed between the piston and the cylinder, the one-way seal being configured permit a bypass flow of pressurized air from the first side of the piston, past the one-way seal, and into a space within the cylinder adjacent an opposite, second side of the piston during movement of the piston and driver blade from the top-dead-center position to the bottom-dead-center position, thereby increasing a pressure of the pressurized air within the cylinder and storage chamber cylinder, and a pressure relief valve in fluid communication with the storage chamber cylinder.