Miniature vacuum pump and miniature vacuum device

A miniature vacuum pump, comprising:

• a collection and exhaust chamber defining an intake nozzle and an exhaust hole;
• a leather bowl assembly assembled in an inner space of the collection and exhaust chamber;
• a driving motor with an output shaft extending through a bottom wall of the collection and exhaust chamber to enter into the inner space and be connected to the leather bowl assembly, so as to drive the leather bowl assembly to operate;
• and
• a vacuum breaking assembly comprising:
• an inlet hole extending through the bottom wall of the collection and exhaust chamber;
• a pressure plate movably fitting about a part of the output shaft located in the collection and exhaust chamber, and flexibly covering the inlet hole;
• a rotation member coaxially and fixedly mounted to the output shaft and located at a side of the pressure plate opposite to the bottom wall, wherein a rotation frame protrudes from a lateral side of the rotation member;
• and
• a centrifugal swing rod with a middle being rotatably mounted to the rotation frame at the lateral side of the rotation member through a rotation shaft;
• wherein the rotation shaft is perpendicular to the output shaft, a center of gravity of the centrifugal swing rod is set at an end away from the rotation member, an end of the centrifugal swing rod close to the rotation member is bent and extended toward the pressure plate to form a pressing portion for abutting against the pressure plate.