Air-ventilating insole

An air-ventilating insole comprising:

• an upper insole;
• a center of the upper insole being formed with a receiving groove;
• an enclosing frame enclosing the receiving groove;
• a plurality of U shape positioning slots being formed on the enclosing frame;
• a heel portion of the upper insole being formed with a plurality of air inlets and a front thenar portion of the upper insole being formed with a plurality of air outlets;
• a lower insole located below the upper insole;
• an air chamber being formed by the upper insole and lower insole;
• a plurality of spiral springs installed between the upper insole and lower insole;
• the spiral springs being installed to the U shape positioning slots of the enclosing frame;
• each spiral spring having an upper plane and a lower plane;
• a plurality of coils being wound between the upper plane and a lower plane;
• thereby, the spiral spring being formed as a truncated cone and further as the spiral spring is compressed to be on a same plane;
• one end of the spiral spring being formed with a U shape positioning end which is embedded into a respective U shape positioning slot of the upper insole as the upper insole and the lower insole are adhered together;
• thereby, the U shape positioning end is used to position the orientation of the spiral spring;
• a ventilating layer stuck above the upper insole at a position for contacting the bottom of the leg;
• a plurality of air input holes being formed in the ventilating layer, which are communicated to the air inlets, but no air output holes are formed on the front thenar portion of the ventilating layer for communicating the air outlets of the upper insole;
• when the heel presses upon the insoles, the air inlets of the upper insole and the air input holes of the ventilating layer will compress air in the air chamber so as to flow upward to the front thenar portion of the user's leg.