Sanding disc stabilizing structure of orbital sander

A sanding disc stabilizing structure of an orbital sander, comprising:

• a casing;
• a sanding power source, assembled in the casing and the sanding power source comprising a drive shaft and a tool holder disposed on the drive shaft and offset from an axis of the drive shaft;
• a sanding disc, a center of the sanding disc disposed on the tool holder with a locking screw, the sanding disc driven by the sanding power source to perform an orbital motion relative to the casing;
• and
• at least four springs respectively comprising a first end disposed on the casing and a second end disposed on the sanding disc, wherein a free length of each of the at least four springs is greater than a spacing between an installation part of the casing provided for the first end and an installation part of the sanding disc provided for the second end, and each of the at least four springs is incompletely compressed in the spacing, during the orbital motion of the sanding disc, each of the at least four springs is stretched when the second end thereof deviates from a projection position of the first end.