ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,149, issued on July 21.
"Drive shaft for a retractable power plug" was invented by Xuexiang Wu (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a drive shaft for a retractable power plug, comprising a shaft body and a connector. The outer surface of the shaft body is provided with a first helical sliding groove and a second helical sliding groove in the axial direction. When the drive shaft rotates, the first abutment block in the first helical sliding groove and the second abutment block in the second helical sliding groove interact, moving together in the axial direction of the shaft body. By rotati...