| 摘要 |
An idler drive mechanism for particular use in video tape recorders has an idler wheel drivable by a motor-driven roller and movable into driving contact with a supply reel disc or a takeup reel disc for rotating the same at a rapid rate in a forward or reverse search mode of operation. The idler wheel is rotatably supported on an arm assembly operatively connected by a torsion spring to a slide lever. When the slide lever is displaced in one direction, in the forward or reverse search mode, the torsion spring urges the idler roller into contact with the supply or takeup reel disc. When the slide lever is displaced in the opposite direction, in the recording and reproducing modes of operation, the torsion spring is released into its free state, allowing the idler roller to be retracted out of contact with the supply or takeup reel disc. An idler wheel locking device causes the idler wheel to be retained in a locked position away from the supply or takeup reel disc when the video tape recorder is in the recording or reproducing mode.
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