| 摘要 |
<p>PURPOSE:To prevent the deterioration of interchangeability caused by the difference of a used environmental temperature by interlocking the other end side of an audio control head holding table with a member whose expansion coefficient based on a temperature is large and changing the position of an A/C head in the longitudinal direction of a tape. CONSTITUTION:The A/C head holding table 12 is constituted around a shaft 16 planted in a chassis so that it can be freely turned and energized in the direction shown by an arrow A by a spring 17. Since the other end side of the A/C head holding table 12 abuts on a stopper 18, the turning of the A/C head 13 in the direction shown by the arrow A is regulated. The stopper 18 is planted in the member 19 whose expansion coefficient based on a temperature is large and the position of the A/C head 13 is changed in the longitudinal direction of the tape by the expansion and contraction of the member 19 caused by a temperature. Besides, the length of the member 19 is selected so that the position of the A/C head 13 is changed in the longitudinal direction of the magnetic tape 15 as much as the member 19 is expanded and contracted based on the temperature change of the magnetic tape 15.</p> |
