JPS62291765A - Magnetic head - Google Patents

Abstract

PURPOSE:To prevent a magnetic head and a recording medium from being contacted by using a piezoelectric element for a suspension supporting a slider. CONSTITUTION:Bimorphs 1, 2 are adhered to the suspension 4 by an epoxy group adhesives and they are adhered to the slider side of the suspension. With a motor running at 3,000rpm or over and a magnetic head in read/write, no voltage is applied to the bimorphs 1, 2 and it is unchanged from a conventional floating attitude. When the number of revolutions of the motor is 3,000 or below or no magnetic head is in read/write operation, a voltage is applied to the bimorphs 1, 2, which are bent causing the slider 3 and the storage medium 5 to be parted.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a floating magnetic head used in a magnetic recording device.

[Summary of the invention]

The present invention uses a piezoelectric element in the suspension of a floating magnetic head, and utilizes the fact that the suspension deforms when a voltage is applied to prevent the magnetic head from coming into contact with the recording medium, thereby increasing the durability of the magnetic head and recording medium. (Improve 3-ton ability.

(Prior art) A floating magnetic head is based on the premise that the motor comes into contact with the recording medium when it starts and stops rotating, and wear due to contact cannot be avoided, and the flatness and surface roughness of the magnetic head are Although efforts have been made to create appropriate conditions such as a lubricant film on the recording medium, the mechanism behind crashes and adsorption remains unclear.

[Problem that the invention attempts to solve]

However, in the conventional technology, the durability of the magnetic head and recording medium varies from product to product, and there is a problem with the durability of the magnetic head and recording medium as a storage device.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and its purpose is to provide a suspension for a magnetic head that does not allow the magnetic head and storage medium to come into contact with each other.

[Means for solving problems]

The present invention utilizes a piezoelectric element in the suspension and applies a voltage to the piezoelectric element so that the magnetic head and the storage medium do not come into contact when the rotation speed of the motor is below a certain set value.
Further, when a plurality of magnetic heads are used in a recording device, the magnetic heads that do not actually read or write are separated from the storage medium by applying a voltage to a piezoelectric element so as not to contact the storage medium.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. Figure 1 shows two pieces of a piezoelectric element called a bimorph used in a suspension, and Figure 2 shows the wiring method for the bimorph 1.2 and the positive and negative polarities when applying voltage. shall indicate the direction of polarization.

FIG. 3 shows a bimorph 1.2 bonded to the suspension 4 with an epoxy adhesive, and the bimorph 1.2 is in contact with the slider side of the suspension.

Figure 4 is a diagram when the number of rotations of the motor is 3000 times or more and the magnetic head in the figure is outdated, and no voltage is applied to bimorphs 1 and 2. This is a normal levitation posture. There is no change. Figure 5 is a diagram when the motor rotation speed is 3000 times or less, or when the magnetic head in the figure is not reading or writing. Voltage is applied to bimorph 1.2, and bimorph 1.2 This is a diagram showing how the slider 3 and the storage medium 5 are dynamically separated using bending.By wiring the bimorphs as shown in Figure 2, bimorphs 1 and 2 are bent in opposite directions. , the slider and recording medium are kept parallel. By the way, the same result can be obtained by forming the suspension itself from bimorph instead of attaching bimorph to the suspension.

〔Effect of the invention〕

As described above, according to the present invention, there is no contact between the magnetic head and the recording medium, leading to improved durability and reliability of the magnetic head and the recording medium.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a bimorph type piezoelectric element used in the present invention, Fig. 2 is a wiring diagram of the bimorph, Fig. 3 is a diagram of the bimorph bonded to a suspension, and Fig. 4 is a normal reading/writing diagram. This is a diagram of the magnetic head when
The figure shows the magnetic head when a voltage is applied to the bimorph. l...Bimorph 2...Bimorph 3...Slider 4...Suspension 5...Recording medium A...Mounting section Applicants Seiko Epson Co., Ltd. Agent Patent Attorney Tsutomu Mogami and 1 other person No. 10 No. 20 No. 30

Claims (1)

[Claims] A floating magnetic head characterized in that a piezoelectric element is used in a suspension that supports a slider.