A fastener tool which contains a motor, a drive mechanism connected to the motor and adapted to drive a piston, and a locking module. The locking module includes a rotating member coupled with the drive mechanism and adapted to rotate with a spindle and define a rotation axis; and a receiving member adapted to engage with the rotating member at and engaging portion. The rotating member includes a latch and a biasing member, wherein the biasing member moveably supports the latch in a direction substantially perpendicular to the rotation axis. Therefore, the locking module provides a locking mechanism that prevents back driving of the fastener tool that increases the lifespan and efficiency of the tool.

A powered fastener driver includes a housing, a cylinder supported by the housing, and a moveable piston positioned within and moveable along a driving axis of the cylinder. The piston includes a circumferential groove on an outer peripheral surface thereof. A driver blade is attached to the piston and moveable therewith between a top-dead-center (TDC) position and a driven or bottom-dead-center (BDC) position. A seal assembly is received in the circumferential groove. The seal assembly is configured to create a seal between the piston and the cylinder. The seal assembly includes a biasing member and a seal member positioned radially outwardly of the biasing member relative to the driving axis.

A control and protection mechanism and a nail gun having the same. The control and protection mechanism includes first and second micro-motion switches, a toggle block, a lock pin, an actuating member, a micro-motion contact and a driving rod. The switch bracket is attached to the main body; the first and second micro-motion switches are fixed on the switch bracket; the toggle block is rotatably attached to the switch bracket, and includes a lock groove, a trigger end and a toggle end. The toggle end is operably coupled to the first micro-motion switch and the trigger end extends into inside the main body such that when the piston moves in the cylinder to a position, the piston pushes the trigger end to prompt the toggle block to rotate and therefore the toggle end to move, thereby causing the first micro-motion switch to change its switch state.

An air-path structure of pneumatic a nail gun, formed inside a gun body containing high-pressure air, comprises a main air chamber, a firing valve air chamber and a time-delayed air chamber that continuously releases the high-pressure air to the atmosphere. The gun body is configured with a trigger valve and a slider valve. The inside of the trigger valve is formed with a safety-on air chamber and a safety-off air chamber. The trigger valve controls the high-pressure air inside the firing valve air chamber to be discharged to the atmosphere. The slider valve controls the high-pressure air inside the main air chamber flowing toward the firing valve air chamber, the time-delayed air chamber and the safety-off air chamber. Specifically, the safety-on air chamber is constantly communicated with the main air chamber and constantly contains high-pressure air, and the slider valve can control the high-pressure air inside the safety-off air chamber flowing into the time-delayed air chamber. In this way, the invention can improve the operating safety of conventional pneumatic nail guns.

A nail gun nozzle mechanism includes a clamping wall, a retaining wall, and a switch unit. The clamping wall defines a firing space. The retaining wall defines a withdrawn space that is in spatial communication with the firing space. The switch unit includes a linkage member, and a bracket member. The bracket member is movable relative to the clamping wall between a firing position, where the bracket member is distal from the clamping wall and is disposed in the withdrawn space, and a non-firing position, where the bracket member is proximate to the clamping wall and blocking at least a portion of the firing space. The linkage member resiliently biases the bracket member toward the non-firing position.

A driving tool comprises a displacement allowing mechanism that allows a wheel to be displaced in a radial direction of a rotation shaft. The driving tool further comprises a displacement restricting mechanism that restricts the wheel from being displaced in the radial direction of the rotation shaft. When a driver is to start being moved upwards by an engagement of a first engagement portion with an engaged portion by rotation of the wheel, a displacement restriction state of the wheel caused by the displacement restricting mechanism is released, allowing an entirety of the wheel to be displaceable in the radial direction of the rotation shaft due to the displacement allowing mechanism.

A fastener driving tool with a working cylinder and a piston, the piston outer surface having a lubricant-saturated foam material that stores and dispenses lubricant into the piston-cylinder wall interface, thereby increasing the performance and lifespan of the tool. Another embodiment discloses a two-part piston in which the bottom portion is made of metal and absorbs the main mechanical loading forces of the piston drive and return strokes, and the top portion is made of a non-metallic material that has surfaces that act as sliding bearings against the inner wall of the cylinder.

A driver including: an ejection part to which a fastener is supplied; a driver blade which moves from a first position toward a second position and drives the fastener into a driven member; and a rack provided to the driver blade. The driver further includes: a rotary component engaging with the rack and moving the driver blade from the second position to the first position; and a lock plate engaging with the rack. The driver blade moves from the second position to the first position while the rotary component rotates once, the rotary component is released from engaging with the rack after the driver blade moves from the second position to the first position, and moves from the first position to the second position, and the lock plate is engageable with the rack when the driver blade stops before reaching the second position from the first position.

An actuation system for preventing actuation of a base device upon a non-target substrate. The actuation system includes a detector configured to generate and transmit a profile signal of a test substrate. A processing unit is in communication with the detector and configured to receive the profile signal of the test substrate from the detector, the processing unit being configured to determine whether the profile signal of the test substrate corresponds to a profile signal of a target substrate, and to generate an actuation signal if the profile signal of the test substrate corresponds to the profile signal of the target substrate. An actuation unit is in communication with the processing unit and the base device, the actuation unit being configured to receive the actuation signal from the processing unit and to permit the base device to actuate when receiving the actuation signal.

An actuation system for preventing actuation of a base device upon a non-target substrate. The actuation system includes a detector configured to generate and transmit a profile signal of a test substrate. A processing unit is in communication with the detector and configured to receive the profile signal of the test substrate from the detector, the processing unit being configured to determine whether the profile signal of the test substrate corresponds to a profile signal of a target substrate, and to generate an actuation signal if the profile signal of the test substrate corresponds to the profile signal of the target substrate. An actuation unit is in communication with the processing unit and the base device, the actuation unit being configured to receive the actuation signal from the processing unit and to permit the base device to actuate when receiving the actuation signal.