Patent ID: 7032794

Claim:
A safety device for preventing a nailer from dry firing, comprising: a safety link being fixed to a front end of a nailer and able to move back and forth thereon; a magazine installed at the front end of the nailer, at a side of the magazine defined an elongated hole whose upper portion corresponds to a folded projection of the safety link; a drive plate slidably disposed in the magazine to push nails by cooperating with a spring, the drive plate provided with a projection which being moveably disposed in the elongated hole of the magazine; a safety nut pivotally disposed beside the elongated hole of the magazine and provided with a bevel surface in response to the projection of the drive plate, wherein the projection of the drive plate will push against the bevel surface of the safety nut when no nails are loaded in the magazine, thus, the safety nut produces a leverage effect by taking advantage of the bevel surface, so as to make an end of the safety nut project out of the elongated hole of the magazine; an elastic element disposed at the edge of the elongated hole of the magazine and employed to push against the safety nut so as to keep the safety nut flush with the edge of the elongated hole of the magazine.