Patent ID: 8052021

Claim:
A braking mechanism for empty nail cartridge of a nail gun comprising: a guiding plate and a cover plate coupled to the guiding plate, a punch channel defined between a contacting surface of the guiding plate and the cover plate, a nail hole and an end hole defined in the guiding plate, a connecting hole defined in the guiding plate communicating with the nail hole and the end hole, the nail hole and the connecting hole communicating with the punching channel respectively, a connecting groove defined in the cover plate to communicate with the connecting hole and the punch channel; a punch rod slidably placed in the punch channel to hit nails driven by the nail gun; a securing slide rod, slidably placed on a lateral side of the guiding plate, a stopper formed on a lateral distal end of the securing slide rod corresponding to the end hole; a nail cartridge, arranged at a lateral side of the guiding plate, configured for receiving the nails, a nail pusher and a pushing arm arranged in the nail cartridge to provide resilient force along a nail filling direction, a brake portion formed on the nail pusher facing to the end hole, an oblique surface formed on a lateral distal end of the pushing arm, the pushing arm being pivotably placed on the nail pusher adjacent to the brake portion for affording the resilient force, and the pushing arm opposite to the nail hole, the pushing arm pushing the nails into the punch channel in sequence and allowing the brake portion of the nail pusher to go through the end hole and move into the end hole to block the stopper of the securing sliding rod when the nails is use up, the pushing arm moving into the connecting groove via the connecting hole, so that the oblique surface moves over the punch channel and reaches the connecting groove, when the punch rod in the punch channel blocks the pushing arm to move back to an original position, the punch rod pushed by the oblique surface swinging to an original position to prevent from being interfered by the punch rod.