| 摘要 |
A recording/reproducing device for recording/reproducing information on/from an information disc, which is rotatable about an axis of rotation, by means of a pick-up device movable over the rotating information disc comprises: a housing which, at least during operation of the device, is at least largely closed, a disc driving arrangement within the housing, comprising a drive spindle which is rotatable about said axis of rotation, air filtering means adapted to filter an air flow of ambient air present within the housing during operation of the device flowing over an information surface of a rotating information disc disposed adjacent to the information surface in parallel spaced relation thereto, a casing within the housing encasing an information surface of an information disc disposed on the disc driving arrangement and provided with an air inlet for air to be filtered and an air exhaust for filtered air. To decrease the energy consumption of the air filtering means while ensuring good filtering results, the air filtering means are arranged stationary within the housing and extend over the disc information surface, the airflow flowing axially through the filtering means and being induced by the naturally occurring pumping action of the rotating information disc, while the air flow resistance of the air inlet, the air filtering means and the air exhaust exhibit mutually adapted air flow resistance values substantially preventing any air flow from outside the casing, through the casing and out of the exhaust different from the air flow from the air inlet, through the air filtering means, the casing and out of the exhaust.
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