Magnetic recording and reproducing apparatus

摘要

A magnetic recording and reproducing apparatus including supply and take-up reel stand gears mounted coaxially with each axis of rotation of a supply reel stand and a take-up reel stand, an idler gear adapted to engage the two gears alternatively and interlocking with an output of a forward and reverse rotation driving mechanism, a head plate for supporting a magnetic head and capable of reciprocating so that the head approaches and separates from the tape, and a pinch roller for clamping a tape against a capstan shaft. The pinch roller is supported so that it can be freely brought close to or separated from the capstan shaft and the head plate is provided with an elastic member which urges the pinch roller close to the capstan shaft. When the head plate travels the head approaches the tape during a period in the middle of traveling to a traveling limit. The apparatus further includes a cam plate having a first cam portion for retaining the idler gear in engagement with the two reel stand gears alternatively and a second cam portion for moving the head plate with reel stand gear engagement retained. The cam plate reciprocates on a rectilinear path and a brake follower for the first cam portion cooperates during the switching of the engagement position of the idler gear for the two reel stand gears. Also included is a head follower mounted on the head plate following the second cam portion.