A nailing machine includes a switch operating member 40 for setting to switch respective modes of single striking and continuous striking, and pivot restricting mechanism for restricting a contact lever 34 for operating a valve stem 19 of a start valve 15 from being pivoted in cooperation with the switch operating member 40 set to switch to the single striking mode. By the pivot restricting mechanism, an amount of pivoting the contact lever 34 at a position of operating to draw a middle of a trigger lever 31 in the single striking mode is restricted, and a valve stem 19 is maintained to maintain a state of operating to make the start valve 15 ON.Therefore, a reaction of the nailing machine in the continuous striking is reduced, further, dribble in the single striking mode is prevented from being brought about. In addition thereto, an erroneous operation in connecting an air chuck is prevented.

A nail gun switch mechanism has a trigger valve bar received in a trigger of the nail gun; a trigger lever pivotally disposed on the trigger; a safety slidable bar pivotally disposed on a gun body; a longitudinal guiding hole formed at a peripheral side of the gun body; a shaft slidably received in the guiding hole; a switch bar arranged on the shaft, which the switch bar can bring the shaft to rotate in the longitudinally guiding hole; and a hitting base of the safety slidable bar extending out from an hitting mouth formed at a bottom portion of the gun body. The shaft has a bias pole disposed at a top portion thereof, which the bias pole can synchronously rotate with the shaft and can be reposited by the adjusting of the switch bar. The trigger lever has a shorter end portion; a longer end portion; and an opening.

A triggering device of a nail driver has a single shooting mode and a continuous shooting mode. The triggering device is installed between a safety bar and a trigger of a driver body of the nail driver. The safety bar has an push sleeve extending out of a beating opening of the driver body; a trigger valve being on the driver body at an inner side of the trigger; a valve rod being in the trigger valve. When the trigger is triggered, the valve rod will be actuated so as to open the trigger valve to beat a nail. The trigger device comprises a swingable elastomer having a shape like a cambered hook and being pivotally installed within the trigger. A swingable end of the elastomer has at least one buckle. A hook is at one side of a swinging path of the elastomer. A tension spring is installed on the hook; and a movable rod is at another end of the swinging path of the elastomer. A compressible spring is installed on the movable rod which is assembled to the safety bar.

A fastener-driving tool has a trigger control mechanism that comprises a vertically oriented selectable mode pushrod that is adapted to be rotated to either one of two predetermined positions or states. When the vertically oriented selectable mode pushrod is disposed at a first one of its angular positions or states, the fastener-driving tool is permitted to operate in accordance with a sequential firing mode of operation, whereas when the vertically oriented selectable mode pushrod is disposed at a second one of its angular positions or states, the fastener-driving tool is permitted to operate in accordance with a bump firing mode of operation.

A contact trip assembly for a power nailer, wherein a contact member includes a curved portion that loops rearwardly towards a handle of the nailer. Also provided is an adjustment assembly including an adjustment plate and a pinion gear, a trigger that is slidably engageable within a housing of the tool, a trigger lock including a ring element, an anti-discharge mechanism including a stop member, and a contact trip lock.