| 摘要 |
<P>PROBLEM TO BE SOLVED: To make a motion work separable while reducing a thickness occupied by the motion work as much as possible. <P>SOLUTION: A timepiece wheel train device (1) with reduced height and large power reserve capacity drives display means (4) including a cannon pinion (5) driven around a principal pivot axis (AP) crossing a barrel (3) and an hour wheel (6), by a motion work (7) and includes a driving wheel (8) which is pivoted around a sub pivot axis (AS) outside the barrel (3) and is frictionally coupled with the motion work (7) in a friction surface (9) coaxial to the sub pivot axis (AS). The driving wheel (8) includes a driving cannon pinion (83) which is pivoted around a wheel body (80) along the sub pivot axis (AS) and is coupled with a shoulder part (85) of the wheel body (80) by a friction spring (84) to form the friction surface (9), and the driving cannon pinion (83) cooperates with a minute wheel (14) pivoted around a minute wheel axis (AM). <P>COPYRIGHT: (C)2013,JPO&INPIT |
