| 摘要 |
A mechanical timepiece, comprising a movement (400) including a movement barrel (120), a center wheel (124), a third wheel (126), a fourth wheel (128), a timed annular balance (140), an escape wheel (130), and a pallet fork (142); specifically, a mechanical timepiece comprising a timed annular balance rotating angle control mechanism which is formed so that it gives an air resistance to the rotation of the timed annular balance (140) when a main spring is fully wound up and does not give the air resistance to the rotation of the timed annular balance (140) when the main spring is fully released, the timed annular balance rotating angle control mechanism including resistance levers (436, 496) arranged at a clearance provided on the outer peripheral part of the timed annular balance (140) and characterized by comprising a planetary gear mechanism (410) related to a movement barrel gear (120a) and a ratchet wheel (116).
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