To provide a rotation supporting structure minimizing the temperature dependance of lubricating operation of fluid lubricant in a bearing, and to provide a clock equipped therewith.
The rotation supporting structure 1 for the clock includes an inside structure 2, and an outside structure 3 suitable for the outer periphery of the inside structure 2 rotatably relative to the inside structure 2. It is lubricated by the fluid lubricant L stored in a clearance G between the inside structure 2 and the outside structure 3. The outside structure 3 is formed of a material M2 having a negative coefficient of thermal expansion, while the inside structure 2 is formed of a material M1 having a coefficient of thermal expansion opposite to that for the outside structure 3.
TSUNEYOSHI JUN
AMANO YUKI
SHIGESHIRO KOICHIRO
Noriaki Uchino
Nobuyuki Kimura