| 摘要 |
<p>PURPOSE:To effectively function a dumper mechanism on the cassette lid and to realize a good quality opening/closing of the cassette lid by integrally operating the cassette lid and a fulcrum arm gradually in the rotary condition. CONSTITUTION:A boss 18b engaged with the long hole 17b in a closed condition, but as it moves on the straight line part of a groove 16c, it is moved to the lower part of the long hole 17b. Then, when the boss 18b reaches the lower tip part of the long hole 17b, the fulcrum arm 17 and the cassette lid 18 are turned integrally around a boss 17a as the center. In this case, the turning forward of the cassette lid 18 is restrained by a spring 19 and the movement downward of the cassette lid 18 is restrained by the long hole 17b. Its upward movement is restrained by a supporting part 17c, as well. Thus, the dumper mechanism which functions on the fulcrum arm 17 is also effectively functioned on the cassette lid 18 and the smooth opening operation of the cassette lid is realized.</p> |
