| 摘要 |
PROBLEM TO BE SOLVED: To embody a rotary head which eliminates the need for costly machining, such as lathing, and is inexpensive and easy to manufacture by constituting the parts of the rotary head, such as a rotary drum and a stationary drum, of molded goods formed by molding super-high-molecular-weight polyethylene. SOLUTION: The rotary head has the rotary drum 42 and the stationary drum 44 and is so constituted as to record and reproduce a tape-like magnetic recording medium. In such a case, the rotary drum is formed as a rotary columnar body. The tape-like magnetic recording medium is brought into contact with the outer peripheral surface of this rotary columnar body and the tape-like magnetic recording medium is made to travel by rotation of the rotary columnar body. The stationary drum 44 is arranged as a columnar body having the same diameter as the diameter of the rotary drum 42 on the lower side of the rotary drum 42 concentrically with the rotary drum 42. The tape-like magnetic recording medium traveling in compliance with the rotation of the rotary drum 42 is slid on the outer peripheral surface of the columnar body. The rotary drum 42 and stationary drum 44 of the rotary head are formed of the molded goods formed by injection molding of the super-high-molecular-weight polyethylene as a molding material.
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