| 摘要 |
PROBLEM TO BE SOLVED: To provide a gearing having an elastic means for elastically restoring a plurality of gears combined circumferentially relatively displaceable therebetween into a conditioning in which they are out of phase with respect to each other, with the gears prevented from being worn or damaged by interfering with or rubbing against springs, so that their durability can be enhanced, SOLUTION: The elastic means comprises a protrusion 5 provided on one of the gears 3 to combine with a recess 4 provided in the other of the gears 4 and to be elastically deformed as the plurality of gears 2, 3 are displaced relative to each other.
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