Abstract: A single-and-continual shot changeover device for a nailing gun includes a trigger shaft positioned in an interior of a trigger body, a trigger inner member pivotally connected with an intermediate fitting stage of the trigger shaft, which also has two slide shaft stages at two sides of the fitting stage for two springs and two press buttons to fitting around respectively. The two press buttons are elastically pushed to shift outward to engage one of two—an upper and a lower—grooves of the two sidewalls of the trigger body. When the two press buttons are pressed inward, the trigger inner member can be shifted up and down to let the press buttons secured at either of the two limit grooves by means of the trigger shaft. Then the trigger inner member is controlled to separate or not from the safety connect rod for changing firing a single shot or continual shot.

Abstract: A device for preventing short nails of a nailing gun from being deadlocked includes a slot-sealing member provided under the gunpoint of a nailing gun. The slot sealing member has its topside formed with an elongate slot sealing portion for sealing up the front slot of the nail row inlet of the gunpoint when the slot sealing member is pushed inward, preventing a short nail from being deadlocked when it is struck in a work. When the slot sealing member is pushed outward, its sealing portion will be moved away from the front slot of the nail inlet to completely open the nail row inlet for facilitating loading a long nail formed in a row in the gunpoint, unnecessary to disassemble the slot sealing member from the gunpoint when a row of long nails and short nails are loaded alternately, and easy and quick in operating.

Abstract: A nail cartridge for a nail gun includes a nail cartridge formed integral, and a nail pusher received completely in the nail cartridge so that the appearance of the whole nail cartridge look clean and neat. The nail pusher has a special structure so as to simplify its operation and handling.

Abstract: A nail box device for a nailing gun includes a bottom base and a cover body pivotally combined together, letting the cover body opened and closed easily. The cover body can be locked together with the bottom base when a bolting device is moved upward and closes the nail box. The nail box can be opened when a nail pushing device together with the bolting device is pulled backward to a preset distance, able to open the nail box quickly and load a rowed nail into the nail box precisely.