BICYCLE HUB, ELECTRIC POWER SUPPLY DEVICE FOR BICYCLE, AND ELECTRIC POWER SYSTEM FOR BICYCLE

摘要

PROBLEM TO BE SOLVED: To provide a bicycle hub which easily secures electric continuity between a hub shaft and a hub shell, an electric power supply device for a bicycle, and an electric power system for a bicycle.SOLUTION: A hub dynamo 180 has: a hub shell 182 which is supported so as to rotate relative to a hub shaft 184; and a first bearing 192 provided between the hub shell 182 and the hub shaft 184. The first bearing 192 includes: a metallic outer ring 250 which rotates integrally with the hub shell 182; and a metallic inner ring 248 which is supported by the hub shaft 184 and does not rotate integrally with the hub shell 182. The outer ring 250 and the inner ring 248 are electrically connected by a plurality of metallic rolling elements 252.SELECTED DRAWING: Figure 26