| 摘要 |
In the helical scan type magnetic recording and reproducing apparatus having the tape loading mechanism for training the magnetic tape against the wall of the tape guide drum including the magnetic head over the predetermined angle, an idler is arranged to selectively engage the supply reel pedestal and the takeup reel pedestal and is provided with a driving torque transmitting means for transmitting driving torque from a drive source to this idler wherein the aforesaid driving torque transmitting means is arranged to be switchable between a 1st mode where the driving torque of the drive source is directly transmitted to the idler and a 2nd mode where the driving torque of the drive source is transmitted through a slip torque transmission portion to the idler, and this switching is effected in relation to operation of the aforesaid tape loading mechanism.
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