| 摘要 |
PURPOSE:To realize a high performance whose characteristics are equal in both of a forward rotation and a reverse rotation in a narrow space by providing separately a sound recording and reproducing head substrate for a forward rotation and a reverse rotation, and an erasing head substrate used for a forward rotation and reverse rotation, so that the erasing head substrate is controlled by the head substrate used for the forward rotation or reverse rotation. CONSTITUTION:In case a stop state is shifted to a forward rotation sound recording and reproducing state, when a motor 22 rotates a clockwise, a sound recording and reproducing head substrate 42 used for forward rotation is rotated clockwise by a spring 84, a projection 49 abuts on a projection 48 of an erasing head substrate 46, and the substrate 46 is guided by holes 54, 55 and advances. The upper part of the hole 55 is larger than a diameter of a pin 57 of the substrate 46, therefore, the substrate 46 rotates clockwise, an an erasing head 50 used for forward rotation abuts on a magnetic tape. Subsequently, a projection 47a of the substrate 46 is locked by a bearing part 73. An erasing head 52 used f or reverse rotation does not abut on the tape but only a tape guide 53 contacts to the tape. A sound recording and reproducing head 45 used for forward rotation abuts on the tape. |
