INFORMATION RECORDING AND REPRODUCING HEAD

• Main Authors: ICHIKAWA RYOICHI, SAKAI KAZUO, TERAYAMA TAKAO
• Format: Patent
• Language: English
• Published: 07.11.1990
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

PURPOSE:To control the vibration of an information recording medium, and stably fetch an output by providing a rotatable second head which does not record/reproduce information on a front side in the rotating direction of a rotary head. CONSTITUTION:A second head 2 is arranged on electrostrictive elements 5a and 5b ahead of a rotary head 1. When a constant voltage is applied in the width direction of the elements 5a and 5b, the head is expanded/compressed in the longitudinal direction, when a potential on the external side of the elements 5a and 5b is zero and the voltage is applied from a power source 10 to the center part of the elements 5a and 5b, for example, the element 5a is compacted, and the element 5b is expanded to the contrary. Since the elements 5a and 5b are mutually bonded at the center part, the whole element 5 is displaced, and the second head 2 provided at the tip of the element 5 is displaced as shown in a figure. Since the displacement quantity of the element 5 can be controlled by the voltage, the head 2 can be displaced so as to slightly project to the external periphery of a drum 6. When the rotary head rushes or separates with respect to an information recording medium 7, the vibration of the medium 7 can be controlled by displacing the second head 2 and making contact with the medium 7.