Transmission Shaft Set, Transmission Shaft Structure and Metal Pin Connecting Shaft

A transmission shaft structure, comprising:

• a metal pin connecting shaft, comprising:
• an arc part;
• a fastening block;
• a plurality of electrically connecting parts located on the arc part;
• and
• a plurality of electrically connecting metal pins located on the fastening block and electrically connected to the plurality of electrically connecting parts;
• and
• a base fastened to the metal pin connecting shaft, the base comprising:
• a fastening groove, used for fastening to the fastening block;
• at least one fastening part located next to the fastening groove;
• and
• at least one column located next to the fastening groove and the at least one fastening part.

A transmission shaft set, comprising:

• a plurality of transmission shaft structures, each of the transmission shaft structures comprising:
• a metal pin connecting shaft, comprising:
• an arc part;
• a fastening block;
• a plurality of electrically connecting parts located on the arc part;
• and
• a plurality of electrically connecting metal pins located on the fastening block and electrically connected to the plurality of electrically connecting parts;
• and
• a base fastened to the metal pin connecting shaft, the base comprising:
• a fastening groove, used for fastening to the fastening block;
• at least one fastening part located next to the fastening groove;
• and
• at least one column located next to the fastening groove and the fastening part;
• wherein the at least one fastening part of the base of one of the transmission shaft structures is fastened to the at least one column of the base of another transmission shaft structure, whereby the plurality of transmission shaft structures are connected to each other.