| 摘要 |
PROBLEM TO BE SOLVED: To improve the guidance of a tourbillon and the whole aesthetics of a watch in the watch that is equipped with the tourbillon. SOLUTION: The tourbillon has a lower bridge (2), an upper bridge (1) and an escapement bridge (3). The escapement bridge (3) supports a balance spring (4), an escapement wheel (5), and a palette assembly (6). The lower bridge (2) has a circular rim which is designed so as to fit into the outer rim trench of three rotation rollers (9, 10, 11) of the watch movement. COPYRIGHT: (C)2008,JPO&INPIT
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