| 摘要 |
PURPOSE:To protect a wheel cassette from vibration, by providing a body engaging with the inside of a guide hole on the side facing to the wheel cassette of a selection motor. CONSTITUTION:A wheel cassette 34 is positioned between a rotary shaft 4 of a selection motor 3 and a face section 38 of an intermediate receiving member 31. A cam body is rotated to move the selection motor 3 together with a fixing member 8 and an engaging body 5 toward the intermediate receiving member 31 so as to engage said body 5 with the inside of a guide hole 43 of a wheel cassette 34 thus inserting the rotary shaft 4 and a coupling pin 25 of a coupling arm 24 respectively into a shaft hole 47 of a type wheel 35 and a coupling hole 48. The type wheel 35 is mounted rotatably together with the rotary shaft 3 in a state of being born on the wheel cassette 34. Since the engaging body 5 is engaged with the inside of the guide hole 43 of the wheel cassette 34, vibration of wheel cassette due to the rotation of the type wheel 35 in the wheel cassette caused by the rotation of the rotary shaft 4 of the selection motor 3 is prevented. |
