MECHANICAL TIMEPIECE WITH ELECTROSTATIC CAPACITY TYPE DETECTING PART AND BRAKING PART

摘要

A mechanical timepiece, comprising a movement (200) including a movement barrel (120), a second wheel (124), a third wheel (126), a fourth wheel (128), a timed annular balance (140), an escape wheel (130), and a pallet fork (142), coils (180a, 180b) being installed on the front surface of a main plate (102) so that these coils face the main plate side surface of an annular balance wheel (140b), a balance magnet (140e) being installed on the main plate side surface of the annular balance wheel (140b) so that the balance magnet (140e) faces the front surface of the main plate (102) , and additionally comprising a detection part (276) installed for detecting the swing angle of the timed annular balance by detecting a variation in electrostatic capacity between a timed annular balance electrostatic capacity electrode part (240) and a detecting electrostatic capacity electrode (250) varying according to the operating condition of the timed annular balance (140) and a braking part (146) formed so that a force to suppress the rotation of the timed annular balance (140) is applied to the timed annular balance (140) when the swing angle of the timed annular balance (140) detected by the detection part (276) is equal to or more than a pre-set angle.