| 摘要 |
<p>PURPOSE:To open and close plural cassette covers approximately simultaneously by providing a means, which adjusts the rotation torque of a rotating body, in a damper device to which the revolving shaft of the rotating body provided with a cassette cover opening/closing driving gear is press-fitted to a case together with a viscous body. CONSTITUTION:Opening and closing of cassette covers 10 and 11 of a double cassette tape recorder are controlled independently of each other by damper devices 12a constituted approximately similarly to each other. A rotating body 13 of the device 12A has a cassette cover opening/closing driving gear 14 in one end and has a rotation control part 15 constituting the cylindrical revolving shaft in the other end, and the control part 15 is press-fitted into a bottomed cylindrical case 16 together with a rotation torque adjusting disc 17 and a viscous body 18 such as a grease or the like. A screw member 19 for adjusting operation is engaged with the bottom part of the case 16 so that this member 19 is freely operated in accordance with the disc 17. Devices 12A are attached to covers 10 and 11 independently of each other, and members 19 are operated in this state to set opening speeds of covers 10 and 11 approximately equally.</p> |
