Patent ID: 6880740
Filing Date: 2005-04-19
Classification: B25C

Abstract:
1. An impact enhancing device of an electric nailer, comprising: an AC power source, a protection circuit, a first switch, a full-wave rectifier/full-wave doubler, a timing controller circuit, an energy-storage circuit, a solid-state switch circuit, an electro-magnetic coil device, a DC power source, a second switch, a reset enable single shot trigger circuit, and a relay; wherein the solid-state switch circuit includes a SCR and two voltage divider resistors, the SCR contains an anode connected to one port of an electro-magnetic coil of the electro-magnetic coil device and a cathode connected to the negative terminal of an energy-storage capacitor of the energy-storage circuit, each of the two voltage divider resistors contains a first port connected to a normally opened connector of the relay and a second port connected to the gate of the SCR, wherein: when the two voltage divider resistors are subjected to a voltage, the SCR is conducted, so that the energy-storage capacitor of the energy-storage circuit discharges to the electro-magnetic coil of the electro-magnetic coil device, thereby generating an electro-magnetic force.