MAGNETIC RECORDING AND/OR REPRODUCING DEVICE

PURPOSE:To heighten responsibility at a mode changing time, and to reduce the consumption of power, by driving a supply reel feather by operating a one-way clutch mechanism by means of the selective rotary driving of a rotor, when a running direction is switched from a forward running to a reverse direction. CONSTITUTION:At the switching time of a tape running from the forward running where a tape is sent out from the supply reel hub 6 of a tape cassette 1, to a reverse running, such as in a rewinding time, a linking state between an idler 92 on one side out of a pair of idlers 91 and 92 on a large diameter gear 89, and a large diameter gear 95 which drives a take-up reel hub 7 at a winding side, is released, and at the same timing, the idler 91 on the other side is linked with a large diameter gear 110 which drives a supply side reel feather 127, and immediately the gear is driven in the reverse direction. Along with the above, a mode change is performed by the operation of a one-way clutch mechanism 109 buit in the supply side reel feather 127 without relaxing a tension arm 114. In this way, high responsibility can be obtained, and a load on a capstan motor is reduced, thereby the consumption of power can be reduced.