▎ 摘　　要

NOVELTY - The device has an upper plate (1) and a lower plate (2) which are arranged opposite to each other. One side close to the lower plate is uniformly provided with multiple semicircular grooves. An inner portion of the semicircular groove is matched with an upper flexible conductive layer rail (3). A lower side of the upper plate is connected with another semicircular groove whose inner side s matched with a lower flexible conductive layer rail (4). USE - Ball disc type rotary conductive device used for aerospace, wind power generation and military applications. ADVANTAGE - Since the rolling ball and the upper and lower flexible conductive layer tracks can maintain the initial deformation when mounting, the reliability of the contact can be improved, the generation of the arc can be inhibited, and the stability of the signal and the current transmission can be ensured. The stability and reliability are increased. The friction and abrasion are reduced, and the service life of the device is prolonged. The device is convenient to install and manufacture, and has high manufacturability and reliability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a quality detection method of ball disc type rotary conductive device. DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the ball disc type rotary conductive device. Upper disc (1) Lower disc (2) Upper flexible conductive layer rail (3) Lower flexible conductive layer rail (4) Ball (5) Connecting shaft (6) Lower bearing (7) Upper bearing (8) Retainer (9) Leading-out wire (10)