Track adapter and the driving power supply and track light thereof

A track adapter (1000), comprising:

• a mounting seat (100), having a first central axis (101);
• an electrical supply column (200), rotated around the first central axis (101) and arranged on the mounting seat (100), and provided with a negative electrode conductive sheet (201) and at least two positive electrode conductive sheets (202) on its column body, and the positive electrode conductive sheets (202) extend to a bottom of the electrical supply column (200) forming positive electrode contacts (2021), and the positive electrode contacts (2021) are arranged around the first central axis (101) at intervals;
• further comprising:
• an adjustment conductive portion (300), located at the bottom of the electrical supply column (200), and rotated around the first central axis (101) and arranged on the mounting seat (100), provided with a conductive contact (301) in flexible connection with the bottom of the electrical supply column (200), and a moving path of the conductive contact (301) passes through the positive electrode contacts (2021);
• an adjustment knob (400), which is rotatable and arranged on the mounting seat (100) and located on the outside of the top of the electrical supply column (200);
• and a drive mechanism (500), which is used to connect the adjustment knob (400) and the adjustment conductive portion (300).