| 摘要 |
<p>PHN 8493 30-12-1976 For driving a video record on a video player use can be made of a clamping device which comprises a drive spindle on which record supporting means are disposed which inter alia comprise: a centring member, having a centring surface whose transverse dimension varies from smaller than to greater than the diameter of the record hole, which centring surface, also during operation, co-operates with the edge of a record hole; a record loading device which during operation presses the edge of the record hole against the centring surface; and record carrying means which frictionally co-operate with the video record and which are disposed at some radial distance from the centring member. In accordance with the invention the record carrying means comprise a record carrying member which as a whole is axially movable between an upper and a lower position. which member by means of a parallel guidance is accurately coaxially movable relative to the centring member, the positioning surface for the frictional co-operation with a video record to be played being rigidly connected to the record carrier member and being disposed in a plane, which, regardless of the axial position of the record carrying member relative to the centring member, is always perpendicular to the axis of rotation of the drive spindle. Resilient means are provided for urging the record carrying member towards its upper position.</p> |
