DETENT ESCAPEMENT AND MECHANICAL WATCH HAVING SAME

WIPO Patent Application WO/2011/030694

A1

A detent escapement (100) includes an escape wheel (110), a balance (120) having an impulse pallet (122) and an unlocking stone (124), and a blade (130) having a locking stone (132). A single blade spring (140) that can contact the unlocking stone (124) is provided on the blade (130). The single blade spring (140) is disposed at an angle so that when a blade reference line (129) that is the line connecting the rotational centers of the balance (120) and the blade (130) is used as a reference, the distance from the blade reference line increases as an end portion of the single blade spring (140) becomes distant from the rotational center of the balance (120) on the side where the escape wheel (110) is present and on the opposite side thereof. The single blade spring (140) is disposed between a locking stone support arm (131) and a single blade spring support arm (133).

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KODA, Masayuki (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)
幸田　雅行 (〒07 千葉県千葉市美浜区中瀬１丁目８番地　セイコーインスツル株式会社内 Chiba, 〒2618507, JP)

JP2010/064810

March 17, 2011

August 31, 2010

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SEIKO INSTRUMENTS INC. (8 Nakase 1-chome, Mihama-ku Chiba-sh, Chiba 07, 〒2618507, JP)
セイコーインスツル株式会社 (〒07 千葉県千葉市美浜区中瀬１丁目８番地 Chiba, 〒2618507, JP)
KODA, Masayuki (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)

G04B15/14

KUHARA, Kentaro et al. (8 Nakase 1-chome, Mihama-ku, Chiba-sh, Chiba 07, 〒2618507, JP)

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