| 摘要 |
PURPOSE:To obtain an automatic tracking device of an extremely simple constitution which consumes no energy by forming a support spring part so that a reproduction magnetic head can move easily in the parallel diretion to the rotary shaft of a rotary cylinder. CONSTITUTION:A support spring part 6 is attached to a rotary cylinder 5, and a support plate 3 for reproduction magnetic head is attached to the part 6. Then a reproduction magnetic head 1 is attached to the plate 3. The part 6 has such a shape so as to move easily in the parallel direction to the rotary shaft of the cylinder 5. The rigidity EH is satisfatorily increased to the driving direction of the head 1 with use of the plate 3 and the part 6. While the rigidity EV is reduced in the direction parallel to the rotary shaft of the cylinder 5 with the plate 3 and the part 6. Thus the head 1 can trace correctly the recording track of a video tape. |
