Abstract: A concave drive shaft in combination with a power tool includes: the power tool, a drive shaft and a sleeve. The drive shaft is disposed in a power tool, and has a recess. The sleeve has a coupling post provided for inserting into the recess, so that the sleeve is assembled to the drive shaft. The position where the sleeve is connected to the drive shaft is located in the power tool, so that the portion of the sleeve located outside the power tool is shortened, which allows the power tool to be used in a narrow working environment after the sleeve is assembled to the power tool.

Abstract: An auxiliary handle of a pneumatic tool includes a gripping member, a tube, a first urging member, a pole, a second urging member and a lever. The auxiliary handle makes the user to hold the pneumatic tool with both hands. The lever is pivoted on the gripping member to be pressed to move the pole, and consequently, gas flows in the auxiliary handle are changed. As a result, the pneumatic tool will not take any action if the user only pulls a trigger of the pneumatic tool without pressing the lever.

Abstract: An auxiliary handle of a pneumatic tool includes a gripping member, a tube, a first urging member, a pole, a second urging member and a lever. The auxiliary handle makes the user to hold the pneumatic tool with both hands. The lever is pivoted on the gripping member to be pressed to move the pole, and consequently, gas flows in the auxiliary handle are changed. As a result, the pneumatic tool will not take any action if the user only pulls a trigger of the pneumatic tool without pressing the lever.

Abstract: A nail gun structure includes a gun body, a clamp set and a pneumatic driving set. The gun body has a trigger for shooting a nail. The clamp set is assembled with the gun body. The clamp set has a driven base and a clamp base. The clamp base pivots relative to the driven base. A stacked board is positioned on the clamp base. The pneumatic driving set is disposed between the gun body and the clamp set. The pneumatic driving set communicates with an air pressure source. The trigger moves along with the pneumatic driving set. Under this arrangement, when a user pulls the trigger, the pneumatic driving set drives the clamp base to pivot, so that the stacked boards are clamped between the clamp base and the driven base; thereafter, the nail is shot and nailed on the stacked board.

Abstract: A trigger assembly for switching one shoot mode or repeat shoot mode includes a trigger, a switch, a fixing element, a trigger plate and a torsion spring. When a user wants to switch the shoot modes of the nail gun, the user turns the switch so that the fixing element moves along the curved track of the switch and the fixing element drives the trigger plate to move on a protrusion or on a through hole simultaneously. After the user presses the trigger, the trigger plate is resisted by the protrusion so that the nail gun is in one shoot mode. In addition, when the trigger plate is vibrating on the through hole, the nail gun is in repeat shoot mode.

Abstract: A trigger structure for switching one shoot mode or repeat shoot mode includes a trigger member and a switching member. The trigger member has a recess defined laterally. Two protrusions are defined in the inner wall of the recess. The switching member has an adjusting member and a trigger plate. Under this arrangement, when the adjusting member is pressed into the recess, the trigger plate is at one position to allow the trigger to shoot in a repeat shoot mode; when the adjusting member is turned to abut against the two protrusions, the trigger plate is at another position to allow the trigger to shoot in a one shoot mode.

Abstract: A protection device of a nail driver for preventing from triggering in a state of ineffective actuation comprises a trigger device including a trigger, a trigger sheet, and an ejecting rod; the trigger being installed at an inner side of the body of the nail driver; a lower end of the trigger sheet being elastically pivoted to an inner side of the trigger; thus, the trigger sheet elastically resisting against the ejecting rod; therefore, when the trigger is pressed, the trigger sheet will drive the ejecting rod to pivotally rotate; a safety device including a sliding unit, and a driving rod; the sliding unit being slideably installed at a lower side of the body; one end of the sliding unit extending to a shooting head of the nail driver; the driving rod being elastically pivoted at another end of the sliding unit; the driving rod is a unidirectional confinement structure.

Abstract: The present invention refers to a pushing device of a drawer type magazine apparatus, especially for use with nail guns, in which the magazine apparatus is coupled to a barrel and includes a magazine unit. The magazine unit is equipped with a fixed magazine and a removable nail loading assembly, which cooperates with a pushing device and a nail pusher. The pushing device is equipped with an accommodating member and a spiral spring, by means of the cooperation of the accommodating member and the spiral spring of the pushing device and the nail pusher, the nails can be pushed precisely and stably with an average thrust, so that the situation of nails slanting or getting nails stuck will not happen. The objectives of promoting the convenience for operators and providing durable nail guns are achieved.

Abstract: The present invention refers to a dry firing prevention device, especially for use in a nail gun with a drawer type magazine, in which the main body of the nail gun is equipped with a safety apparatus and a dry firing prevention device near a trigger. The dry firing prevention device is disposed on the magazine. When a nail pusher pushes nails until where last few nails are left, the nail pusher will contact with one end of the dry firing prevention device and the other end of the dry firing prevention device blocks the safety apparatus, so that the safety apparatus retains in a safety status to prevent the nail gun from dry firing, so as to prolong the lifetime of the nail gun.

Abstract: A magazine with a positioning device for a nail gun includes a magazine that has a nail loading port on one end thereof, and a gliding part that has a protruding part and a locking part. The magazine has fixing parts, penetrating parts and a stopping part. The gliding device has a nail storing part and is inserted into the receiving chamber. The gliding device is fixed by a positioning device, so that the gliding device will not depart from the magazine due to the bounce motion while nailing, and the protruding part and the locking part of the gliding device are not easy to get abrasion. The objectives of providing the operator a safe and secured working environment, prolonging the lifetime of the gliding device and securing the gliding device in position will be attained.

Abstract: A control device for a magazine of a nail gun includes a control knob located on an outside of the body and is connected to a control member extending into the groove in the magazine. A collar is threadedly connected to the control member and a bar which has two pivotable members pivotably connected to two ends thereof. The two pivotable members are pivotably connected to the body of the magazine so that when rotating the control knob, the bar is moved in the magazine so as to define the space for accommodating the nails of different sizes.

Abstract: A cap feeding device for a roofing gun includes a moving member and a pressing member which is pivotably connected to the moving member. Both of which are engaged with the rail unit of the container for receiving stack of caps. A torsion spring is biased between the two respective connection portions of the moving member and the pressing member. A coil spring has one end connected to the moving member and the other end of the coil spring is fixed to a bottom of the rail unit so that the moving member is movable along the rail unit. The caps can be directly pressed into the container and the user simply pulls the moving member upward till the pressing member pops outward to press on the top of the stack of the caps.

Abstract: An adjusting device for a power nailer includes a connection member connected to the barrel of the nailer and the trigger and an adjusting bolt are respectively connected thereto. The adjusting bolt is threadedly connected to the connection member and an end of the adjusting bolt is connected to a movable member which is connected to an end of a link of a safety device. A retaining member such as a torsion spring is connected between the movable member and the link. By rotating the adjusting bolt, the link is adjusted a distance to the nose of the nailer. The retaining member allows different types of the links and the movable members to be connected each other.

Abstract: A stapling comprises a nose having a top seat, a nose cover, and a fastening latch. The top seat is mounted on the top of a magazine and is provided with a plurality of retaining portions. A top cover is provided with a plurality of retaining portions and is mounted on the top seat such that the retaining portions of the top cover are retained by the retaining portions of the top seat. The fastening latch is pivoted to the top cover such that a retaining ring of the fastening latch is retained by a holding slot of the retaining portions of the top seat. The top seat and the top cover are securely held together in such a way that they work together to confine a staple which is discharged by the stapling gun, thereby ensuring the accuracy and precision of driving staples.

Abstract: A stapler nose includes a passage defined therein and a plurality of stops extend from two sides of a face of the nose. A top plate is mounted on the face of the nose has positioning blocks which are engaged with the stops. Two first lugs extend from a face of two sides of the top plate. Two hooks are connected to one pair of the stops and each hook has an engaging recess. A fastening device includes a pivotable member which includes two second lugs and each second lug has a notch. The two second lugs are pivotably connected between the two first lugs. An enclosed loop has a first straight section for being engaged with the notches in the two second lugs and a rear straight section for being engaged with the first engaging recesses of the hooks.

Abstract: A barrel unit of a pneumatic nail driving device includes a base plate with a pair of hooking lugs. An elongated cover plate is superimposed on and is pivoted to a rear portion of the base plate, and has a pair of pivot ears, a pair of abutment tabs projecting sidewise respectively from the pivot ears, and a pair of shoulder disposed behind the hooking lugs of the base plate. An operating lever has a pair of pivot ears mounted pivotally on the pivot ears of the cover plate in such a manner that the pivot ears of the operating lever slidably and respectively contact the abutment tabs, and a U-shaped clasper pivotally connected to the operating lever. After disposing the clasper around the hooking lugs, rearward pivotal action of the operating lever results in engagement between the clasper and the hooking lugs and subsequently causes tight engagement between the pivot ears of the operating lever and the abutment tabs, and tight engagement between the shoulders and the hooking lugs.

Abstract: A nail cartridge for a pneumatic nail driving device includes a housing that defines therein a nail groove, a plate receiving space over the nail groove, a sliding passage disposed sidewisely and offset from the nail groove, and a gap between the plate receiving space and the nail groove. The nail cartridge further includes a nail pushing plate disposed movably in a longitudinal direction in the plate receiving space and extending into the nail groove, and an urging member for urging the nail pushing plate in a manner that the nail pushing plate is moved in a transverse direction relative to the longitudinal direction into the gap so as to clear the nail groove without requiring detachment of the nail pushing plate from the housing.