公开(公告)号：US4060248A

公开(公告)日：1977-11-29

申请号：US583987

申请日：1975-06-05

申请人： Herman Gerard Lakerveld ,  Gerard Eduard VAN Rosmalen ,  Kornelis Bulthius ,  Johannes Petrus Sinjou

发明人： Herman Gerard Lakerveld ,  Gerard Eduard VAN Rosmalen ,  Kornelis Bulthius ,  Johannes Petrus Sinjou

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B15/66 ,  G11B17/032 ,  G11B25/04 ,  G11B7/24 ,  H04N1/28

CPC分类号： G11B17/032 ,  G11B7/0037

摘要： A playing apparatus, more specifically a video player for playing round records with a central hole, which are made of a transparent material, which records at one side have a transparent surface and at their other side are provided with information tracks which are optically readable with the aid of a read beam, which tracks are covered by a light-reflecting layer. In order to enable both relatively thick rigid records and relatively thin flexible records to be played on one playing apparatus, the invention provides a transparent adapter disc, which together with a flexible record can be positioned on the playing apparatus and driven in a rotary fashion. In order to prevent dust particles from being trapped between the flexible record and the transparent adapter disc, the adapter disc may be provided with a central recess with a number of air admission apertures at the circumference thereof, so that during operation a thin film of air is formed between the flexible record and the adapter disc.

摘要翻译： 更具体地说，用于播放具有中心孔的圆形记录的视频播放器，其由透明材料制成，其一侧记录有透明表面，并且在另一侧具有光学可读的信息轨道 读取光束的帮助，其中光道被光反射层覆盖。 为了使相对厚的刚性记录和相对薄的灵活记录能够在一个播放装置上播放，本发明提供一种透明适配盘，其与柔性记录一起可以定位在播放装置上并以旋转方式驱动。 为了防止灰尘颗粒被捕获在柔性记录和透明适配盘之间，适配盘可以在其圆周处设置有具有多个进气孔的中心凹部，使得在操作期间，薄膜空气 形成在柔性记录和适配盘之间。