JPH0246516A - magnetic head device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head of a magnetic head device or a magnetic head support structure.

[Prior Art 1] A gimbal in a magnetic head device supports a magnetic head and brings the magnetic head into smooth contact with a disk. Therefore, the gimbal is designed so that the magnetic head can easily follow the rotating disk and can move freely. Therefore, the periodic force generated between the magnetic head and the rotating disk is easily transmitted to the gimbal, and the resulting gimbal vibration is likely to cause a resonance phenomenon. Conventionally, in order to suppress such resonance phenomena, the vibration mode of the gimbal, which is thought to be making complex vibrations, has been changed, the resonance gain has been attenuated, the resonance frequency has been shifted, etc.

[Problems to be Solved by the Invention] As with the prior art, the problem of the present invention is to provide a means for suppressing the resonance phenomenon of the gimbal, and its purpose is to provide a means for suppressing the resonance phenomenon of the gimbal. Due to the resonance of the holding gimbal, the spacing between the magnetic head and the disk changes in proportion to its resonance gain and at its resonance frequency, resulting in a decrease in the recording magnetic field and a drop in playback output (space loss). This prevents periodic occurrences.

[Means for Solving the Problems] The magnetic head device of the present invention is a magnetic head device in which a magnetic head 61 is brought into contact with a disk via a gimbal that holds the magnetic head. 1. A magnetic head device characterized in that a shield plate attached to a portion around the gimbal or the magnetic head is attached to a gimbal or a magnetic head via a viscoelastic body.

[Example] Examples of the present invention will be described below based on the drawings. First, conventionally, as shown in FIG. 2, the periodic forcing force generated between the magnetic head 2 and the rotating disk is
It is transmitted to gimbal 3 via. If the period is such that the gimbal 3 resonates, the gimbal resonates, and the magnetic head 2 accordingly resonates. The spacing between the magnetic head and the disk is proportional to its resonance gain and changes with its resonance period, resulting in a periodic decrease in the recording magnetic field and a decrease in the reproduction output (space loss). , the performance of the magnetic disk device cannot be ensured.

In order to suppress the above-mentioned resonance phenomenon, in the present embodiment shown in FIG. There is.

As a result, the vibration system of the shield plate and the viscoelastic body is added to the vibration system of the gimbal 3, and the viscosity coefficient of the entire vibration system can be set by the viscoelastic body 1.

Generally, the maximum amplitude during resonance tends to decrease as the viscous resistance increases. Therefore, by increasing the viscous resistance of the entire vibration system, it is possible to attenuate the maximum amplitude during resonance. The viscosity coefficient of the entire vibration system can be set by changing the viscosity coefficient of the viscoelastic body 1 and its shape such as thickness.

Furthermore, gimbal resonance occurs when the frequency of the periodic force generated between the above-mentioned 6R air head and the rotating disk matches the resonant frequency of the gimbal's vibration system. By adding the shield plate and viscoelastic body shown in Figure 1 to the gimbal vibration system, it is possible to change the resonant frequency of the entire vibration system. This can be set by the mass of the shield plate and the elastic coefficient of the viscoelastic body.
By setting the resonance frequency to be different from the frequency of the early forcing force, it is possible to suppress the occurrence of resonance phenomena.

As a result, the above-described decrease in the recording magnetic field and the decrease in the reproduction output do not occur periodically, and the performance of the magnetic disk device can be ensured.

In this example, the headband shield 4 is bonded to the gimbal 3 via the viscoelastic body 1, but it may also be bonded to the magnetic head 2, or both the gimbal 3 and the magnetic head 2. It has a similar effect. Further, the adhesive of the shield plate itself can be made of a viscoelastic body.

[Effect of the invention 1] As described above, according to the present invention, the reduction in the recording magnetic field and the reduction in the reproduction output (space loss) caused by the resonance phenomenon of the gimbal can be reduced without the need to change the shape of the gimbal, etc.
By using a viscoelastic material as the shield plate and the adhesive, this problem can be prevented by an inexpensive and simple method without adding extra cost, and has the effect of ensuring the performance of the magnetic disk device. Furthermore, in manufacturing magnetic disk devices,
Yield can also be improved.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a head support structure showing an embodiment of the present invention. FIG. 2 is a diagram of a conventional gimbal structure. l... Viscoelastic body 2...Magnetic head 3. Gimbal 4... Stingy Shield that's all Applicant: Seiko Epson Corporation

Claims (1)

[Claims] In a magnetic head device that brings the magnetic head into contact with a disk via a gimbal that holds the magnetic head, a shield plate that surrounds the head or is attached to a part of the head is attached to the gimbal via a viscoelastic material. Or a magnetic head device characterized by being attached to a magnetic head.