Patent ID: 6955281
Filing Date: 2005-10-18
Classification: B25C

Abstract:
1. An electric nailing gun comprising: a gun body defining therein a plunger reciprocating path, said plunger reciprocating path having a first end and a second end, said gun body having a bore at the second end of said plunger reciprocating path; a plunger mounted inside said gun body for a reciprocating motion along said plunger reciprocating path; a spring member connected between said plunger and said gun body for holding said plunger at the first end of said plunger reciprocating path; a coil mounted inside said gun body for generating a magnetic field attracting said plunger to move along said reciprocating path from the first end to the second end; a nail magazine having a magazine shell for accommodating a plurality of nails, said magazine shell defining a nail path in communication with said plunger reciprocating path, a magazine follower movable along said nail path for moving said nails out of said nail path into said plunger reciprocating path for striking by said plunger, and a magazine spring connected between said magazine shell and said magazine follower for pushing said magazine follower to force nails out of said nail path into said plunger reciprocating path; a control circuit for controlling supply of electric current to said coil, said control circuit having a counter for counting the number of striking actions of said plunger; and a sensor mounted in said nail magazine and electrically connected to said control circuit for outputting a control signal to said control circuit to further drive said counter to start counting the number of striking actions of said plunger when said magazine follower is moved to a predetermined position in said nail path, whereby said control circuit reduces the supply of electric current to said coil when the counting of said counter reaches a predetermined value.