A needle chasing assembly and timepiece mechanism

Abstract

The utility model discloses a kind of needle chasing subassembly and timing mechanism, needle chasing subassembly includes needle chasing wheel and the center wheel coaxially arranged with needle chasing wheel, needle chasing wheel and center wheel can relatively rotate, needle chasing subassembly further includes needle chasing unit, needle chasing cam and reset piece, wherein, needle chasing unit rotation is set on needle chasing wheel;Needle chasing cam is coaxially arranged with center wheel and needle chasing cam and center wheel can synchronous rotation, the outer wall of needle chasing cam is always abutted on needle chasing unit;One end of reset piece is connected to needle chasing wheel, the other end is connected to needle chasing unit, for exerting the force of close to needle chasing cam to needle chasing unit.The needle chasing subassembly solves the problem that return spring is embedded in elastic sheet in traditional structure, resulting in poor flatness, unstable contact, improves the stability and response accuracy of needle chasing action, avoids disengagement due to vibration or wear;Simultaneously realize the continuous reliable following between needle chasing lever and cam, ensure that sectional time measurement is accurate.

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