Nail gun provided with duster function

A pneumatically operated nail gun comprising:

• a main body having a lower end and defining therein a compressed air chamber;
• a cylinder fixedly disposed in the main body and providing a cylinder space;
• a piston slidably movable in the cylinder between its upper dead center and a lower dead center and dividing the cylinder space into an upper cylinder space and a lower cylinder space;
• a driver blade extending from the piston in the lower cylinder space and protrudable from the lower end of the main body for striking against a head of the nail in accordance with the movement of the piston toward its lower dead center;
• a control valve supported to the main body and selectively introducing a compressed air into the upper cylinder space from the compressed air chamber and discharging the compressed air in the upper cylinder space to an atmosphere;
• and
• a duster mechanism comprising:
• a duster nozzle provided at the main body for ejecting a compressed air therethrough;
• an air passage section extending between the duster nozzle and the compressed air chamber;
• a pressure release valve disposed at the air passage section for selectively shutting off a fluid communication between the compressed air chamber and the duster nozzle;
• and
• a pressure reducing section disposed at the air passage section for providing a compressed air passing through the duster nozzle at a pressure lower than that in the compressed air chamber.