| 摘要 |
<p>PURPOSE:To maintain a high quality opening/closing movement regardless when it is for vertical or horizontal use by providing a dumper member for performing a dumper function by its own weight and a dumper member utilizing viscosity when a movement is returned from a closing to an opening condition. CONSTITUTION:At the time of an opening operation for the vertical use, the gravity of a dumper member 16 and the tension force of a dump spring are exerted on the returning force of a cassette holder spring 13 via tooth parts of 16a and 12d as a load and an opening operation of a cassette holder 12 is executed at a proper speed. Also when it is for the horizontal use, the weight of the dumper member 16 is not exerted as a load at the time of opening the cassette but only the tension force of the dumper spring is exerted as a load. Thus, it is not necessary to enlarge the elastic force of the spring 13; the high quality operation of the opening/closing is not damaged and the load at the time of the closing operation is made small.</p> |
