Air valve adjusting switch assembly

An air valve adjusting switch assembly, comprising:

• a valve body, comprising:
• an air flow passage;
• and
• an air valve adjusting pipe, being installed on a lateral side of the valve body and vertically interconnected with the air flow passage, and having a screw thread disposed on an external side of the top of a pipe opening of the air valve adjusting pipe, moreover an internal side of the air valve adjusting pipe being coupled to a portion with a tapered-neck opening of the air flow passage;
• an adjusting bolt, being installed in the air valve adjusting pipe, and having a front end extended into the air flow passage for adjusting the size of the air flow passage, and a conic structure formed on the adjusting bolt corresponding to a portion of the tapered-neck opening of the air valve adjusting pipe;
• a circular groove, being concavely disposed on the conic structure of the adjusting bolt;
• an airtight ring, being an elastic ring sheathed onto the circular groove of the adjusting bolt, and attached tightly with the tapered-neck opening;
• a screw cap, being rotatably installed at the top of the air valve adjusting pipe, having a plurality of thread teeth disposed on an internal wall of the screw cap for rotatably engaging with the screw thread of the pipe opening of the air valve adjusting pipe, for sealing the air valve adjusting pipe by the adjusting bolt;
• and
• a shoulder portion, being disposed at a distal edge of the bottom of the adjusting bolt with the conic structure, the external diameter of the shoulder portion being greater than the diameter of the air flow passage, being latched into the air valve adjusting pipe.