| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a music box which emits a sound at an accurate timing.SOLUTION: A music box includes: a rotating disk 82 which is rotated in accordance with rotation of a second shaft 26 and has a plurality of slits 84 formed in a circumferential direction correspondingly to arrangement of outer peripheral teeth of a sun wheel 28; and an encoder 80 which detects passage of slits 84 of the rotating disk 82 rotated in accordance with rotational driving of the second shaft 26 driven by a motor. Displacement of the sun wheel 28 can be accurately recognized on the basis of passage timings of the slits 84 detected by the encoder 80, and the occurrence of deviation in engagement between the outer peripheral teeth 40 of the sun wheel 28 and a gear part 38 of a star wheel 14 can be suitably suppressed. That is, the music box emitting sounds at accurate timings can be provided.</p> |
