Patent ID: 7762442

Claim:
A control mechanism for a pneumatic nail gun, the pneumatic nail gun comprising a trigger, a trigger valve and a safety rod, the trigger being disposed at a side of the trigger valve, the pneumatic nail gun defining a first air flow passage connecting the trigger valve to the control valve, and a second air flow passage for controlling nail hitting by conducting pressurized air-from the control valve, the control mechanism comprising a control valve comprising a valve plug adjacent to the safety rod; wherein the control mechanism further comprising: a valve sleeve telescopically disposed in the control valve, the valve sleeve defining at least one first air hole, and at least one second air hole between an inner sidewall surface and an outer sidewall surface thereof, the first air hole being in communication with the first air flow passage, the second air hole being in communication with the second air flow passage; the valve plug being slidably received in the valve sleeve, an upper sealing ring being disposed on the valve plug and is above the first air hole, a middle sealing ring being disposed on the valve plug and is between the first air hole and the second air hole, the upper sealing ring and the second sealing ring are configured for separating the first air flow passage from the second air flow passage; and a connecting rod engaging with the valve plug and the safety rod, the connecting rod being configured for driving the valve plug and the safety rod to move downwardly to a predetermined height in advance, thereby controlling the pressurized air to drive the pneumatic nail gun.