| 摘要 |
An intermittent drive mechanism capable of noise reduction is provided. The intermittent drive mechanism comprises a drive gear, a fragmental gear, a first cam, an operating arm, an operating-arm drive mechanism, and a brake mechanism. The fragmental gear includes a mesh portion, of which teeth arranged in a predetermined region on a circumference mesh with the drive gear, and a non-mesh portion, which is free of teeth in the remaining region on the circumference and so does not mesh with the drive gear. The first cam rotates integrally with the fragmental gear. The operating arm contacts with the first cam to rotate the fragmental gear so as to put the same in a mesh state, in which the mesh portion meshes with the drive gear, from an optional, initial position in a non-mesh state, in which the non-mesh portion faces the drive gear. The operating-arm drive mechanism drives the operating arm upon energization of a solenoid. The brake mechanism restricts rotation of the fragmental gear at least when the fragmental gear is disposed in the initial position.
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