Automatic Air Inrtake Device for Pneumatic Tool

An automatic air intake device for a pneumatic tool, and the pneumatic tool comprising:

• a front segment, a rear segment, and
• a body including a grip, a fitting sleeve fitted with the grip, and an air passage for flowing high pressure air, the fitting sleeve having a chamber defined therein, a closing face formed on a first end thereof, an opening formed on a second end thereof, and a notch defined on a central position of the closing face;
• a cylinder slidably fitted, moving in the chamber of the fitting sleeve, and partially extending out of the fitting sleeve from the opening of the chamber, the cylinder including a room defined therein and a contacting fence defined on one end thereof adjacent to the closing face of the chamber of the fitting sleeve;
• a valve unit fixed between the room of the cylinder and the contacting fence, such that the high pressure air is controlled by the valve unit to flow;
• a piston member accommodated in the room of the cylinder and pushed by the high pressure air to slide forward and backward;
• an elastic mechanism having elastic push force and fixed in the fitting sleeve, the elastic mechanism pushing the cylinder to move forward;
• an automatic air intake device including a control shaft tightly fitted in then notch of the body and moving forward and backward with the cylinder, the control shaft having a close section and a guiding section, wherein when the close section of the control shaft stops the air passage of the body, the pneumatic tool is closed, and when the pneumatic tool moves forward to drive the cylinder to move backward, at least one portion of the guiding section of the control shaft aligns with the air passage, such that the high pressure passage flows in the air passage of the body smoothly, and the valve unit controls the high pressure air to push the piston member forward and backward.