| 摘要 |
PURPOSE:To form a drive transmission system of a small size only with a flat gear having high transmission efficiency by providing different rotary support shafts for a driving gear and a driving lever respectively and at the same time setting the rotary support shaft of the driving gear on a line connecting the juncture between a guide pin and the driving lever and the center of the guide pin and at the cassette loading position. CONSTITUTION:The 2nd rotary lever 16 contains a recess part 16a and a flat part 16b where a guide pin 14a of a main gear 14 are hooked. The lever 16 and the gear 14 are supported by different shafts. Therefore the pin 14a hooks completely within the part 16a when the cassette loading is through. Under such conditions, the normal line on the contact face between the part 16a and the pin 14a is set toward the 1st support shaft 2d. As a result, the power acting on the pin 14a is applied toward the shaft 2d although the lever 16 is turned counterclockwise by a coil spring 17. Thus no moment of revolution is produced to the gear 14.
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