| 摘要 |
<p>PURPOSE:To manufacture a driving device with a relatively small tolerance by making an internal gear unmovable, and by oscillatably supporting an external gear on the axis of the internal gear, and at the same time by forming a changeover gear that cooperates with the changeover device, so that the driving device can be constituted simply and with a small number of members. CONSTITUTION:To operate a changeover device 32, a changeover gear 39 that is turned less than 360 deg. via a cam/gear transmission device 40 when the members are displaced between the terminal positions is provided. The cam/gear transmission device 40 is made up of an external gear 39 and an internal gear 43 engaging with the external gear 39. The internal gear 43 is unmovable, and the external gear 39 is oscillatably supported on the axis 44 of the internal gear 43, and at the same time a changeover gear that cooperates with the changeover device 32 is formed.</p> |
