| 摘要 |
A music box includes interconnected cover parts which define a hollow case for housing a drive unit, the drive unit includes a gear transmission system having shafts with gears fixedly mounted thereon in meshing relationship. A plurality of slots are provided in one cover part for supporting the shafts and the other cover part has a plurality of complementary projections which extend into the slots for maintaining the shafts in alignment. The one cover part is mounted on a support plate and all the shafts of the gear transmission system are arranged in planes parallel to the plane of the support plate to facilitate assembly of the music box.
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