Abstract: A nail gun includes a rotatable shaft which can lock a switch of a trigger of the nail gun in a nail-empty condition. The rotatable shaft has a locking portion and a driven portion extending partly into a nail magazine, such that when a nail pushing member disposed in the nail magazine reaches a predetermined position, the nail pushing member pushes the driven portion to make the rotatable shaft rotate about an axis perpendicular to a marching direction of the nails loaded in the nail magazine. As a result, the locking portion of the rotatable shaft in an initial position and spaced away from the switch will move to a locking position to be engaged with the switch. Therefore, the nail gun can shoot nails continuously until there is totally no nail in the nail gun and the nail gun is locked.

Abstract: An oscillation reducing suspension device for a fan motor of a combustion-powered tool includes a rigid axial-play setting unit mounted on an upper major surface of a cylinder head, and having upper and lower limit defining members that are spaced apart from each other by an axial play route, a suspending mount configured to keep the fan motor oriented in a rotary axis, and having a lug which extends radially into the axial play route to divide the axial play route into proximate and distal regions, and an elastomeric damper unit having upper and lower damping members respectively disposed in the distal and proximate regions. By virtue of the rigid mount supporting the fan motor, and the resilient damper unit coupling the mount and the cylinder head, the fan motor is firmly secured to the cylinder head, and axial oscillation of the fan motor is reduced.

Abstract: An impact device is used for an electric nail gun. The electric nail gun includes a supporting frame, a flywheel disposed pivotally on the supporting frame, and a swing arm disposed pivotally on the supporting frame. The impact device includes a sliding block disposed movably on the supporting frame, a nail striker rod connected to the sliding block, and an impact block floatable on the sliding block. When the swing arm rotates toward the flywheel, it presses the impact block against the flywheel to thereby move the sliding block from a pre-firing position to a firing position. Since the impact block is not co-rotatable with the swing arm, it can be designed to move in a direction the same as that of the nail striker rod, thereby facilitating smooth firing operation.

Abstract: An automated screw driving device comprises: a gun housing; a first motor mounted to the gun housing; a fly wheel mounted to the gun housing and driven by the first motor to rotate relative to the gun housing; a carrier mounted slidably on the gun housing and having a wheel-contacting member that is movable toward the fly wheel to contact the fly wheel so as to permit the power of the first motor to be transferred to the carrier to cause rapid sliding movement of the carrier upon rotation of the fly wheel about its axis; a screw driver mounted rotatably to the carrier; a gear set coupled to the screw driver; and a second motor coupled to the gear set for driving rotation of the screw driver relative to the carrier.

Abstract: A fastener driving tool includes a flywheel rotated by a drive unit and having a wheel rim formed with teeth, an impact member having a mating toothed unit movable with a carrier frame to engage the teeth so as to be swept thereby to an end-stroke position to enable a striking rod to drive a fastener into a targeted workpiece, and an actuating unit configured to actuate the carrier frame to move from an upper position to a lower position in response to a triggering action of a trigger so as to move the mating toothed unit from an disengaging position to an engaging position.

Abstract: A floating impact apparatus for an electrical nail gun includes a carrier, an impact unit, and a floating unit. The impact unit includes an impact member, and at least one sliding, wheel disposed pivotally on the impact member. The floating unit includes a guiding rod together with the impact member being connected movably to the carrier, two floating members extending through the carrier to connect with the guiding rod at positions proximate to a first side of the carrier, and at least two resilient members disposed between a second side of the carrier and the floating members for biasing the guiding rod and the impact member to move relative to the carrier to thereby maintain contact between the sliding wheel and the first side of the carrier, so as to promote smooth movement and nail-striking force of the impact member.

Abstract: A combustion powered nail gun includes a combustion sleeve moveable between a sealed position and an open position; a trigger switch having a first hook portion; a safety lever pivotally mounted in a housing and provided with a second hook biasable to be engaged with the first hook portion; and a restriction member connected to and moveable along with the combustion sleeve in a way that when the combustion sleeve is in the open position, the restriction member is stopped at the safety lever in which the second hook portion is engaged with the first hook portion so as to lock the trigger switch, and when the combustion sleeve is in the sealed position, the restriction member is spaced away from the safety lever to enable the second hook portion to be biasable away from the first hook portion so as to unlock the trigger switch.

Abstract: A two-switch device is used for an electric nail gun. The electric nail gun includes a safety member movable to press against an article to thereby move in the gun body, a kinetic power unit for generating kinetic energy, an impact unit for outputting kinetic energy to perform a nail-striking operation, and a transmission unit for transmitting the kinetic energy. The two-switch device includes a first electrical control unit controlled by a trigger and the safety member for driving the kinetic power unit, and a second electrical control unit controlled by an inner plate for driving the transmission unit. By controlling actuation order of the safety member and the trigger, the electric nail gun can be changed between a single shot mode and a continuous shooting mode.

Abstract: The control mechanism for an electric nail gun includes: a first sensor for generating a first sensing signal in response to movement of a safety member of the electric nail gun; a second sensor for generating a second sensing signal in response to operation of a trigger member of the electric nail gun; an actuating piece adjusted selectively between a single shot position and a successive shooting position, and rotatable relative to the trigger member; a third sensor for generating a third sensing signal in response to rotation of the actuating piece; and a control unit activating a driving module of the electric nail gun upon receipt of the first or second sensing signals, and energizing an electromagnetic valve of the electric nail gun upon receipt of the third sensing signal.

Abstract: A driving unit for an electric nail gun includes a pushing block. The pushing block is movable relative to a supporting bracket of the electric nail gun along an axis, and has an inclined surface abutting against an end of a swing arm. Movement of the pushing block results in pivoting movement of the swing arm between a first position, and a second position farther away from a flywheel than the first position. The inclined surface has a slope between 0.087 and 0.7, so as to lock effectively the swing arm at the first position to thereby increase the nail-striking force of an impact member.

Abstract: A floating impact apparatus for an electrical nail gun includes a carrier, an impact unit, and a floating unit. The impact unit includes an impact member, and at least one sliding, wheel disposed pivotally on the impact member. The floating unit includes a guiding rod together with the impact member being connected movably to the carrier, two floating members extending through the carrier to connect with the guiding rod at positions proximate to a first side of the carrier, and at least two resilient members disposed between a second side of the carrier and the floating members for biasing the guiding rod and the impact member to move relative to the carrier to thereby maintain contact between the sliding wheel and the first side of the carrier, so as to promote smooth movement and nail-striking force of the impact member.

Abstract: A fastener driving tool includes a flywheel rotated by a drive unit and having a wheel rim formed with teeth, an impact member having a mating toothed unit movable with a carrier frame to engage the teeth so as to be swept thereby to an end-stroke position to enable a striking rod to drive a fastener into a targeted workpiece, and an actuating unit configured to actuate the carrier frame to move from an upper position to a lower position in response to a triggering action of a trigger so as to move the mating toothed unit from an disengaging position to an engaging position.

Abstract: A nail gun includes a rotatable shaft which can lock a switch of a trigger of the nail gun in a nail-empty condition. The rotatable shaft has a locking portion and a driven portion extending partly into a nail magazine, such that when a nail pushing member disposed in the nail magazine reaches a predetermined position, the nail pushing member pushes the driven portion to make the rotatable shaft rotate about an axis perpendicular to a marching direction of the nails loaded in the nail magazine. As a result, the locking portion of the rotatable shaft in an initial position and spaced away from the switch will move to a locking position to be engaged with the switch. Therefore, the nail gun can shoot nails continuously until there is totally no nail in the nail gun and the nail gun is locked.

Abstract: An oscillation reducing suspension device for a fan motor of a combustion-powered tool includes a rigid axial-play setting unit mounted on an upper major surface of a cylinder head, and having upper and lower limit defining members that are spaced apart from each other by an axial play route, a suspending mount configured to keep the fan motor oriented in a rotary axis, and having a lug which extends radially into the axial play route to divide the axial play route into proximate and distal regions, and an elastomeric damper unit having upper and lower damping members respectively disposed in the distal and proximate regions. By virtue of the rigid mount supporting the fan motor, and the resilient damper unit coupling the mount and the cylinder head, the fan motor is firmly secured to the cylinder head, and axial oscillation of the fan motor is reduced.

Abstract: A combustion powered nail gun includes a combustion sleeve moveable between a sealed position and an open position; a trigger switch having a first hook portion; a safety lever pivotally mounted in a housing and provided with a second hook biasable to be engaged with the first hook portion; and a restriction member connected to and moveable along with the combustion sleeve in a way that when the combustion sleeve is in the open position, the restriction member is stopped at the safety lever in which the second hook portion is engaged with the first hook portion so as to lock the trigger switch, and when the combustion sleeve is in the sealed position, the restriction member is spaced away from the safety lever to enable the second hook portion to be biasable away from the first hook portion so as to unlock the trigger switch.

Abstract: A nail magazine includes: a magazine body defining a nail channel extending in a longitudinal direction, a rear opening for access into the nail channel, and a side opening for access into the nail channel; a cover mounted on and slidable relative to the magazine body and formed with an inner recess in spatial communication with the nail channel through the side opening; and a nail-driving unit including a slider mounted on the cover and slidable relative to the cover in the longitudinal direction, and a nail-pushing element mounted on the slider and movable relative to the slider in a transverse direction relative to the longitudinal direction.