Patent ID: 8104658
Filing Date: 2012-01-31
Classification: B25C

Abstract:
1. A blocking device for a nail gun, the blocking device being installed on the nail gun, the nail gun having a nail groove base, a safety bar, and a nail cartridge, the blocking device comprising: a push member, disposed on a nail pusher in the nail cartridge and configured for moving toward the nail groove base along with the nail pusher pushing multiple nails; a brake member, movably installed on the nail pusher by a first spring force, and configured for moving toward the nail groove base with the nail pusher pushing the multiple nails; and a rotational fastener, pivotably installed on the nail groove base by a second spring force on moving paths of the push member and the brake member, having a touch part configured to be touched to rotate by the push member and a fastening part configured to have physical contact with the brake member to stop the brake member when there are a small number of remaining nails in the nail cartridge so as to prevent the brake member moving to a position where the brake member blocks an upward movement of the safety bar, and configured to be released by the push member and to rotate back to an original position when there is no remaining nail in the nail cartridge so as to release the brake member to move to the position where the brake member is engaged to an end groove formed on the nail groove base and have physical contact with the safety bar to block the upward movement of the safety bar, the small number of remaining nails being less than ten nails, wherein a guiding groove is disposed on an end of the nail pusher facing the nail groove base, the guiding groove being configured for slidably mounting the brake member thereon, and wherein a first elastic member is disposed between the guiding groove and the brake member, the first elastic member being configured for providing the first spring force.