A bearing scavenge system comprises a scavenging passage extending axially through a rotating shaft supported by the bearing assembly. The each storage cell includes a storage unit that stores a charge, a polyhedral container that houses the storage unit and has two opposing surfaces, and a pair of electrode terminals that output and input the charge of the storage unit. A difference detecting section detects a difference amount showing a difference between previous image data and latter image data of two pieces of consecutive image data inputted by the sampling section, and determines to perform screen update by using the latter image data when the difference value is equal to or larger than a threshold value. A compression spring is received on the conductive shaft intermediate and engaged with the conductive coupling and with a conductive ring stop member projecting radially from the conductive shaft. Each band is attached to the tubular at a first connection point and a second connection point, wherein each band is configured to bow radially outward as the expandable tubular shortens in length in response to the expansion of the tubular. The bearing rotatably bears the rotary shaft section in such a manner as to transmit a torque between the rotary shaft section and the rotary hollow section.