Miniature air pump

A miniature air pump comprising:

• a rotation motor unit;
• a valve unit;
• and
• a compression unit connected with the rotation motor unit and driven by the rotation motor unit to input or output airflows via the valve unit, wherein the compression unit comprises:
• an air chamber module comprising a plurality of compressible chambers and a plurality of resilient connection members, each resilient connection member comprising a sealing head, a bottom head and a rod portion interconnected between the sealing head and the bottom head, wherein each compressible chamber and each resilient connection member are made of different materials, each resilient connection member has a greater material hardness than a material hardness of each compressible chamber, and each compressible chamber has a bottom through hole into which the sealing head of each resilient connection member engages, each compressible chamber has a convex sealing ring disposed around the bottom through hole to be in contact with the sealing head of each resilient connection member, each compressible chamber and the convex sealing ring are made from an elastic rubber material, a maximum outer diameter of the convex sealing ring is smaller than a maximum outer diameter of the sealing head of each resilient connection member;
• and
• a linkage rod physically connected with and driven by the rotation motor unit, the linkage rod comprising a central rod and multiple sleeves extending from the central rod, each sleeve having an internal circular groove and a side cutout, wherein a longitudinal direction of the side cutout is in parallel with the central rod, the rod portion of each resilient connection member being slid into the internal circular groove of each sleeve through the side cutout, and each sleeve is sandwiched between the bottom through hole of each compressible chamber and the bottom head of each resilient connection member such that the rotation motor unit drives the air chamber module to be compressed or decompressed so as to input or output airflows via the valve unit.