Patent ID: 7866520
Filing Date: 2011-01-11
Classification: B25C

Abstract:
1. A staple gun with a safety device comprising: a housing having a staple exit in a bottom thereof and an inner chamber adjacent to the staple exit, a safety device and a staple-floating unit, the safety device and the staple-floating unit being disposed inside the inner chamber; wherein: the safety device includes a safety push sheet and a switch, a lower end of the safety push sheet extends out of the staple exit, in a middle portion of the safety push sheet is defined an engaging slot along a staple-discharging direction, the safety push sheet is further provided with a triggering sheet at an upper end thereof, the inner chamber is provided with a switch corresponding to the triggering sheet in such a manner that the contact moves upwards with the safety push sheet to turn on the switch to transmit a staple-discharging signal; the staple-floating unit includes a guide sheet, a control knob, a positioning pin, one end of the guide sheet extends out of the staple exit, a middle portion of the guide sheet is provided with a linkage sheet for penetrating the engaging slot, the other end of the guide sheet cooperates with the safety push sheet to pull both ends of an elastic element in such a manner that the safety push sheet is movably connected to the guide sheet, the guide sheet is provided with a pair of fins above the elastic element, each of the fins includes an elongated transverse hole for penetration of the positioning pin; and the housing is defined with an insertion hole corresponding to the staple-floating unit in such a manner that the control knob is elastically installed in the insertion hole to advance/retreat along the elongated hole, the control knob is located between the two fins, the control knob is defined with a through hole in alignment with the elongated hole for penetration of the positioning pin, both ends of the positioning pin, which penetrate the guide sheet, are limited by the housing, so that the control knob is guided to extend/retract along the elongated hole, and the positioning pin drives the safety push sheet and the guide sheet to move up and down to enable the safety push sheet and the guide sheet to protrude out of the staple exit.