| 摘要 |
A rotary head drum for a video tape recorder includes a stationary lower drum member (35) having a base portion (35a) and inner and outer cylindrical portions (35b, 35c) extending generally upwardly from the base portion (35a) to define an internal cavity (51a) therebetween. A rotary assembly (37) is rotatably mounted on a rotor shaft (46) coaxial with the lower drum member (35) and has at least one rotary magnetic head (36) mounted thereon for recording digital signals on and reproducing the signals from a magnetic tape (30) wrapped about the drum. A motor (52) for driving the rotary heads (36), a rotation detector (53) or tach generator for detecting the rotation of the motor (52), and a multi-channel rotary transformer (54) for transferring digital signals to and from the rotary head (36) are all housed in the cylindrical internal cavity (51a) surrounded by the base portion (35a), and inner and outer cylindrical portions (35b, 35c) of the lower drum member (35) which thereby reduces the overall axial height of the video tape recorder. |
