| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive timepiece structure with a chronograph capable of mechanical reset-to-zero of a chronograph pointer, and having improved visibility of the chronograph. SOLUTION: As for a chronograph wheel 51, a stable slip structure with a low torque can be constituted of a heart cam 51c, a chronograph arbor 51d for fixing a chronograph hand and press fitting and fixing the heart cam 51c, and a chronograph gear constituted of a metal chronograph gear body 51a and a chronograph gear seat 51b made of a synthetic resin where a rotation center hole is formed. In addition, a torque is branched from a second chronograph intermediate wheel (2)53 and a second chronograph intermediate wheel (2)52 constituting a second chronograph gear train for rotating a second chronograph hand into two series of a minute chronograph gear train and an hour chronograph gear train, and thereby the degree of freedom for a design can be acquired in arrangement of chronograph wheels 55, 59, and an arrangement constitution separated from the timepiece center furthermore than a conventional chronograph hand position can be acquired. COPYRIGHT: (C)2006,JPO&NCIPI
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