Method for Quickly Replacing an Air Outlet Pipe of an Air Blow Gun

A method for quickly replacing an air outlet pipe of an air blow gun, comprising:

• providing a gun body, a clamping ring, a rotation knob, and a nozzle head;
• wherein:
• the gun body has an air outlet provided with a mounting head;
• the nozzle head is inserted into the mounting head of the gun body;
• the clamping ring is mounted on the mounting head of the gun body;
• the rotation knob is mounted on the clamping ring;
• the mounting head has a periphery provided with two arcuate slots;
• each of the two arcuate slots is provided with two ramps forming two acute resting portions;
• the clamping ring has a substantially C-shaped profile;
• the clamping ring has a periphery provided with two substantially inverted U-shaped slits forming two elastic plates;
• the two elastic plates form two clamping jaws respectively extending into the two arcuate slots of the mounting head;
• each of the clamping jaws is provided with two oblique guide faces corresponding to the two resting portions of each of the two arcuate slots;
• when the two oblique guide faces of each of the clamping jaws touch the two resting portions of each of the two arcuate slots, each of the clamping jaws is pressed outward;
• the nozzle head has a front portion provided with an air outlet pipe;
• the nozzle head is provided with an annular locking groove corresponding to the clamping jaws of the clamping ring;
• and
• the clamping jaws of the clamping ring are locked in the locking groove of the nozzle head by an elastic force of the two elastic plates;
• the improvement comprising:
• the method further comprises:
• rotating the rotation knob to rotate the clamping ring;
• moving the two oblique guide faces of each of the clamping jaws of the clamping ring to touch the two resting portions of each of the two arcuate slots of the mounting head of the gun body;
• pressing outward each of the clamping jaws of the clamping ring;
• releasing the clamping jaws of the clamping ring from the locking groove of the nozzle head;
• detaching the nozzle head from the clamping ring;
• and
• detaching the nozzle head from the mounting head of the gun body.