| 摘要 |
<p>PURPOSE:To ease the vibration of a tape and to prevent the generation of the bend of a picture plane and color slurring by specifing the shape of the projection part of a fixed drum bringing into contact with it at the time of approaching and releasing the tape. CONSTITUTION:An incident side projection part 4 and outgoing side projection part are formed on a fixed head drum 1. At the vicinity of the point 9 where a rotary head 8 and tape 2 about, the shape having no recessed part on the surface of the projection part 4 and no generating space is taken. The shape that the line segment 9' drawn in parallel to the drum center axis exists on the projection part 4 by passing the point 9 where the tape 2 is brought into contact with the head 8 is also taken. This relation is taken similarly on the projection part at the tape outgoing side. As a result, the vibration of the tape can be eased and the generation of the bend of the picture plane and color slurring can be prevented.</p> |
