| 摘要 |
<p>A power transmission device including coaxially a first rotary body (106) including a first gear on a drive source side, a second rotary body (108) including a second gear on a driven side, a third rotary body (107) including a third gear movably held to transmit a driving force, and a guide member (107f, 106f, 108a) disposed at one of the first gear, the second gear, and the third gear to contact a first end surface of a gear tooth of another of the first gear, the second gear, and the third gear, serving as a mating gear, to guide the first end surface between teeth of the one of the first gear, the second gear, and the third gear. The guide member (107f, 106f, 108a) extends toward the mating gear and a tip of the guide member is spaced apart a predetermined distance from an end of the one of the gears.</p> |
