Main Valve Driving Air Passage of Nail Gun

A main valve driving air passage of a nail gun, the nail gun having a gun body with a main valve, a fixed cylinder, an air collecting chamber, a main passage and a trigger valve;

• the main valve being disposed at a top portion of the fixed cylinder, the trigger valve being disposed between the air collecting chamber and the main passage, and the air passage being formed between the fixed cylinder, the main valve and the trigger valve, the main valve driving air passage comprising:
• an air-in passage formed in the trigger valve connecting between the air collecting chamber and the main passage;
• an air-out passage formed in the trigger valve connecting between the main passage and external atmosphere;
• a valve bar arranged in the trigger valve, the valve bar being capable of closing the air-in passage and opening the air-out passage while being released, and opening the air-in passage and closing the air-out passage while being pressed;
• and
• a disc-shaped valve stopper formed at a bottom portion of the main valve, the valve stopper being slidably attached between an outside surface of the fixed cylinder and an inner ring-shaped surface in the gun body, and a top portion of the valve stopper being abutted by the high pressure air in the air collecting chamber, a bottom portion of the valve stopper forming a main chamber connecting with the air-in passage and the air-out passage via the main passage;
• wherein the main chamber collects the high pressure air via the air-in passage to actuate the valve stopper and the main valve to move up while the valve bar is pressed, and the main chamber exhausts the high pressure air in the main chamber via the air-out passage to actuate the high pressure air in the air collecting chamber to drive the valve stopper and the main valve to move down to reposit while the valve bar is released.