Abstract: A driving device for a nail gun includes a striking unit and an air storage unit. The striking unit includes a striking cylinder connected to the nail gun and defining a cylinder chamber having an opening, and a piston disposed in and making an air-tight contact with the striking cylinder. The air storage unit includes an air storage cylinder including a protrusion that protrudes toward the opening and cooperating with the striking cylinder to define an air storage chamber that is in fluid communication with the cylinder chamber via the opening. When the piston moves in a pressure-generating direction, air in the air storage chamber is pressurized. The air storage unit further includes a lubricant disposed in the cylinder chamber and the air storage chamber, and flowing along the protrusion into the cylinder chamber to lubricate the piston.

Abstract: A nail gun includes a frame unit, a flywheel, and a nail-striking device that includes an actuation unit, an impact member and an accidental discharge prevention unit. The actuation unit includes a safety subunit. The impact member has a confining portion. The accidental discharge prevention unit includes a restraining member located between the confining portion of the impact member and the safety subunit. The actuation unit is operable to convert the restraining member from a restraining state, in which the restraining member restrains movement of the confining portion of the impact member, to a releasing state, in which the movement of the confining portion of the impact member is permitted.

Abstract: A power tool includes a motor, an output shaft, a tool main body and an adjustable lighting mechanism. The output shaft is connected to the motor. The tool main body includes an end face and a curved guiding slot. The curved guiding slot is near the end face. The adjustable lighting mechanism includes a housing, a swinging member and a lighting source. The housing is moveably mounted to the tool main body and guided by the curved guiding slots. The swinging member is connected to the housing and includes a pivot centerline. The lighting source is disposed at the housing and includes a lighting centerline. The housing can rotate outward from an output axis, such that the pivot centerline moves within a swinging range and the lighting centerline moves within a lighting range.

Abstract: A heat dissipating device is adapted to be mounted in an electric nail gun that includes a flywheel being rotatable about an axis, a first pulley being spaced apart from the flywheel, and a transmission belt being trained on the first pulley. The heat dissipating device includes a second pulley, a weight disc and a heat dissipating member that are adapted to be connected coaxially and co-rotatably to the flywheel. The second pulley is adapted to be trained by the transmission belt. The heat dissipating member includes a plurality of fan blades extending in a direction of the axis such that, during co-rotation of the flywheel, the weight disc and the heat dissipating member, the fan blades create a flow of air for cooling.

Abstract: A pneumatic electric nail gun includes a muzzle unit, a striking cylinder that is connected to the muzzle unit, a piston rod subunit that extends movably from the striking cylinder into the muzzle unit, an electric unit that drives movement of the piston rod subunit from a standby position to a nail-striking position for striking a nail, and a connecting unit that includes a plurality of fasteners and a plurality of buffer members. The fasteners extend through the electric unit and secure the electric unit to the muzzle unit. Each of the buffer members surrounds a respective one of the fasteners and fills a space between the respective one of the fasteners, the electric unit and the muzzle unit for shock absorption during a nail-striking process.

Abstract: An electric power tool includes a power supply supplying electricity, a driving unit driving operation of the electric power tool, an operation unit to be operated by a user, main and redundant sensing units detecting the power supply, the driving unit and the operation unit, and a control unit including primary and secondary controllers that respectively make first and second determinations according to the detection made by the main and redundant sensing units. The control unit controls the driving unit to operate in a normal mode when both of the first and second determinations indicate that at least one of the power supply, the driving unit and the operation unit operates normally.

Abstract: An electric nail gun includes a flywheel, a swing arm unit, and an actuation unit. The swing arm unit includes a conversion member, and is operable to swing relative to the flywheel in a first direction between an initial position, in which the swing arm unit and the flywheel have a maximum distance therebetween, and a triggered position, in which the swing arm unit and the flywheel have a minimum distance therebetween. The actuation unit includes a pushing member that has a pushing surface facing the conversion member, and a pushing rod that is operable to move relative to the pushing member in the first direction between an extended position, in which the pushing member pushes the conversion member via the pushing surface thereof so that the swing arm unit is in the triggered position, and a retracted position, in which the swing arm unit is in the initial position.

Abstract: An electric power tool includes a battery for outputting electric energy, and an operating device electrically connected to the battery for receiving the electric energy and adapted to operate based on the electric energy. The operating device includes a power module that is configured to output an operating power based on the electric energy; a driving module that is configured to drive a motor to operate based on the operating power; and a control module that is configured to, based on a capacity of the battery, control the driving module to adjust a proportion of the operating power sent from the power module to the motor in a manner that the proportion of the operating power is positively correlated to the capacity of the battery, and to terminate operation of the motor when the electric energy is less than a minimum operating voltage that is determined for the battery.

Abstract: A method is provided for an electrically-driven tool to detect battery decline. The electrically-driven tool includes a battery, a controller and a kinetic device. The controller pre-stores a dataset of energy provision time including a data piece of energy provision time that signifies a predetermined time length presumed to be required by the battery to provide a predetermined amount of electric energy. The controller induces provision of the predetermined amount of electric energy to the kinetic device to have the kinetic device perform a predetermined stroke with a predetermined load, times a stroke time period taken by the predetermined stroke, and determines whether the stroke time period is greater than the predetermined time length. The controller outputs a battery abnormality signal when the stroke time period is greater than the predetermined time length.

Abstract: An electric power tool includes a battery, a first switch connected to the battery, a driving unit, a sensing unit, a primary controller and a secondary controller. The driving unit includes a motor, a second switch connected to the motor and the first switch, and a switch-control circuit connected to the second switch. The sensing unit outputs a detection result to the primary and secondary controllers. The primary controller disables the driving unit when it is determined that there is a malfunction based on the detection result. The secondary controller controls the first switch to operate in a non-conducting state to cut off electricity supplied from the battery to the second switch when it is determined that there is a malfunction based on the detection result. When the first switch operates in a conducting state, the second switch provides the electricity to the motor under control of the switch-control circuit.

Abstract: An electric power tool includes a motor, a lifter, a firing pin, an electromagnet, a driving circuit, a latch, and a controller. The lifter is driven by the motor to drive the firing pin to perform a firing action. The driving circuit provides electric current to excite the electromagnet. The latch is moved by the electromagnet from a blocking position where the latch blocks the firing pin to move in a firing direction to a non-blocking position where the latch does not block the firing pin when the electromagnet is in an excited state. The controller, during an excitement period, controls the driving circuit to provide constant current for a first time period to excite the electromagnet to the excited state, and provide pulsating current for a second time period to keep the electromagnet in the excited state.

Abstract: A lifting gear assembly for an electric nail gun that strikes a nail in a nail-striking direction includes a muzzle seat connected to the electric nail gun, a sprocket unit including two sprocket wheels spaced apart from each other and rotatably mounted in the electric nail gun, a motor unit for driving rotation of one of the sprocket wheels, and a chain unit including a roller chain trained on the sprocket wheels and a lifting gear device mounted to the roller chain. The lifting gear device includes a pushing member driven movably by the roller chain along a path having a stroke in which the pushing member moves in a pressure-generating direction opposite to the nail-striking direction. The pushing member pushes the striking pin, when moving along the first stroke, to move the striking pin from a post-striking position to a pre-striking position.

Abstract: A method of controlling a rotational speed of an electric tool is provided. The electric tool includes a battery, a battery voltage detection circuit, a motor unit, and a controller. The controller stores at least one regression equation of duty ratio on voltage, and detects a voltage of the battery through the battery voltage detection circuit. The controller obtains a duty ratio for a control signal by substituting the voltage of the battery into the at least one regression equation, and outputs the control signal with the duty ratio obtained from the at least one regression equation to the motor unit for controlling operation of the motor unit.

Abstract: A retaining device adapted for use with an electric nail gun includes a retaining member; a swing arm unit adapted to swing between a proximate position and a distal position with respect to a flywheel of the nail gun; an impact unit movably connected to the swing arm unit, including an engaging portion, and being movable between a pre-striking position, where the engaging portion is confined within the retaining member when the swing arm unit is at the distal position, and a striking position, where the engaging portion is removed from the retaining member; and a retrieving unit connected between the impact unit and the swing arm unit, and configured to bias the impact unit to move to the pre-striking position.

Abstract: A method of adjusting an energy output for an electric nail gun including a controller, a motor, a flywheel that co-rotates with the motor, an impact member configured to receive energy of the flywheel to hit a nail, an operation component, an adjust component and a plurality of indicators is provided. The controller has a plurality of energy modes related to controlling the motor to drive the flywheel to rotate with different rotational speeds, respectively. When the adjust component is activated, the controller switches a currently-active energy mode to a next one of the energy modes, and lights up the indicators in a manner corresponding to the next one of the energy modes. When the operation component is activated, the controller controls the motor to rotate in the currently-active energy mode to drive the flywheel thus driving the impact member for firing the nail.

Abstract: A retaining device adapted for use with an electric nail gun includes: a swing arm unit adapted to swing relative to a flywheel of the nail gun; an impact unit adapted to swing with the swing arm unit, and being movable between a pre-striking position proximate to the flywheel, and a striking position distal from the flywheel; a retrieving unit configured to bias the impact unit to move to the pre-striking position; and first and second positioning members connected respectively to the swing arm unit and the impact unit, and magnetically attracted to each other to prohibit removal of the impact unit from the pre-striking position when the impact unit is at the pre-striking position.

Abstract: A striking device includes a swing arm unit, an impact member and two restoring units. Each of the restoring units includes a stationary seat removably connected to the swing arm unit, a moving seat removably and co-movably connected to the impact member, first and second coupling sets, and a resilient member interconnecting the stationary seat and the moving seat to bias the moving seat toward the stationary seat. For each of the restoring units, two portions of the first coupling set are formed respectively on the stationary seat and the swing arm unit and coupled removably with each other, and two portions of the second coupling set are formed respectively on the moving seat and the impact member and coupled removably with each other.

Abstract: A battery device includes a battery unit, a temperature port, a temperature sensitive component, a switch component and a battery management unit. The temperature sensitive component senses a temperature of the battery unit, and provides a temperature indication signal at the temperature port. The switch component is electrically connected to the temperature sensitive component. When the battery device operates abnormally, the battery management unit controls the switch component to make the switch component stop provision of the temperature indication signal at the temperature port.

Abstract: A method of controlling firing mode for an electric nail gun is provided. The electric nail gun includes a control module that, when operating in a program selecting state in an intelligent firing mode, executes a single firing program or a continuous firing program based on which of a safety switch and a trigger switch of the electric nail gun is being activated . When executing the continuous firing program, the control module forbids execution of a nail firing action when determining that the electric nail gun has not been fired for longer than a predetermined time period.

Abstract: A nail gun includes a gun body, a muzzle unit, a nail-feeding unit, a nail-striking unit, and a control unit for controlling the nail-feeding unit and the nail-striking unit to implement a method for feeding nails. The method includes the following steps: energizing a nail-striking solenoid valve of the nail-striking unit to perform a nail-striking operation on one of the nails; de-energizing the nail-striking solenoid valve, and simultaneously starting to count a predetermined delay time period in idle; and upon elapse of the predetermined delay time period, energizing a nail-feeding solenoid valve of the nail-feeding unit to perform a nail-feeding operation on another one of the nails.