SPEED GOVERNOR

PROBLEM TO BE SOLVED: To provide a speed governor capable of easily adjusting the oscillation period of a hair spring with a simple structure, without using a regulator pin.SOLUTION: A speed governor for a timepiece includes a hair spring 1 of which one end is connected to a collet 2 having an open hole for connecting to a balance staff 11, and the other end is connected to a stud 3 for being fixed to a balance bridge 13, and which has a spiral spring part 4 wound around the collet 2 while make a diameter gradually larger. The speed governor has movement means 20 that moves the stud 3 in the axis direction of the balance staff 11 to change a relative distance between the collet 2 and the stud 3.SELECTED DRAWING: Figure 4 【課題】緩急針を使用せずに、ひげぜんまいの振動周期を単純な構造で簡単に調整できる調速機を提供する。【解決手段】一端をてん真１１と接続するための貫通孔を有するひげ玉２に接続し、他端をてんぷ受１３に固定するためのひげ持３に接続し、ひげ玉２の周囲に拡径しながら巻回されるぜんまい部４を有するひげぜんまい１を備える時計用の調速機であって、ひげ持３をてん真１１の軸方向に移動させ、ひげ玉２とひげ持３との相対距離を変更する、移動手段２０を有する構成とした。【選択図】図４