JPS62154380A - Magnetic head device for floppy disk device - Google Patents

Abstract

PURPOSE:To suppress the resonance of a gimbals which holds a magnetic head by providing a damper means which consists of two layers of an elastic member suppressing vibrations operating the gimbals and a silicone adhesive. CONSTITUTION:When a disk 13 has transition from its normal rotation state owing to friction, etc., caused by the contacting between the disk 13 and magnetic head 10 during read/write operation, the transition is transmitted to the gimbals 11 through the magnetic head 10. Consequently, the gimbals 11 vibrates, but the gimbals 11 contacts the silicone adhesive 21, so its vibrations are suppressed by the silicone adhesive 21 and a damper member 20. Namely, a force in the opposite direction from the vibrations of the gimbals is generated by the elastic effect of the damper member 20 and the elastic effect of the silicone adhesive 21, so the vibration of the gimbals 11 are suppressed. The critical condition, which the dislocation of the disk 13 which is transmitted to the gimbals coincides with the natural vibrations of the gimbals 11 and then the gimbals 11 resonates, is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic head device for a floppy disk drive, and particularly relates to an improvement of a magnetic head support structure.

[Technical Background of the Invention and Problems thereof] Conventionally, in a floppy disk device, upper and lower magnetic heads contact a magnetic recording medium (hereinafter referred to as a disk) to perform read/write operations. Here, as shown in FIG. 2, the magnetic head 10 is held by a cymbal 11 formed from a thin metal plate. gimbal 11
is fixed to the carriage body 12, and the magnetic head 1
0 is a member that enables a follow-up operation such that the disc is always in stable contact with the disc.

By the way, in the read/write operation state, as shown in FIG. 3, the upper and lower magnetic heads 10 (SO side and S1 side) come into contact with the rotating disk 13. In this case, a frictional force acts between the magnetic head 10 and the disk 13, and when the surface of the disk 13 changes, the magnetic head 10 moves according to the drag force with the gimbal 11. If this fluctuation is transmitted to the gimbal 11 and coincides with the natural vibration of the gimbal 11, a situation will occur in which the gimbal 11 resonates. Due to this resonance of the gimbal 11, the magnetic helad 10 moves and the state of contact with the disk 13 becomes unstable. Therefore, there is a problem in that the contact condition of the gap portion of the magnetic head 10 with the disk 13 deteriorates, leading to malfunctions in read/write operations.

[Object of the Invention] An object of the present invention is to suppress the imaging of the magnetic head that occurs due to the resonance phenomenon of the gimbal when the magnetic head is in contact with the disk, and to maintain a stable contact state between the magnetic head and the disk. An object of the present invention is to provide a magnetic head device for a floppy disk device that can be obtained at all times.

[Summary of the Invention] The present invention provides a magnetic head device for a floppy disk drive, which includes damper means made of two layers of an elastic member and a silicone adhesive for suppressing vibrations acting on a gimbal that holds a magnetic head.

This damper means is arranged in the space of the carriage body so as to be in contact with the surface of the gimbal opposite to the surface on which the magnetic head is attached by means of a silicon adhesive.

With such a configuration, resonance generated in the gimbal can be suppressed, and as a result, vibration generated in the magnetic head can be suppressed.

[Practice of the Invention VfiJ 3 An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a side cross-sectional view showing the configuration of a magnetic head device according to an embodiment. In FIG. 1, upper and lower magnetic heads 10
(SO side and S1 side) are each gimbal 11
It is maintained by Each gimbal 11 is attached and fixed to a carriage body 12. Damper member 20
is provided in the space of the carriage body 12 on the upper side (Sl side), that is, on the gimbal 11 on the opposite side from the magnetic head 10, with a silicon adhesive 21 interposed therebetween. The damper member 20 is made of, for example, urethane or a sponge-like elastic member. When the silicone adhesive 21 adheres the gimbal 11 and the damper member 20 and dries, it becomes a rubber-like elastic body.

Next, the effects of this embodiment will be explained. When a read/write operation of the floppy disk device is started, the disk 13 is rotated by a spindle motor (not shown). As shown in FIG. 1, the upper and lower magnetic heads 10 come into contact with this rotating disk 13 to perform read/write operations.

During read/write operations like this, the disk 1
3 and the magnetic head 10 due to friction etc.
3 changes from its normal rotational state, the change is transmitted to the gimbal 11 through the magnetic head 10. For this reason,
Although the gimbal 11 will vibrate, since the gimbal 11 is in contact with the silicon adhesive 21, the vibration will be suppressed by the silicon adhesive 21 and the damper member 20. That is, due to the elastic effect of the damper member 200 and the elastic effect of the silicon adhesive 21, the gimbal 11
Since it acts as a force in the opposite direction to the vibration of the gimbal 11, the SvJ generated in the gimbal 11 is suppressed. Therefore, it is possible to suppress a situation where the fluctuation of the disk 13 transmitted to the gimbal 11 and the natural vibration of the gimbal 11 match, causing resonance in the gimbal 11.

Here, since the damper member 20 and the silicone adhesive 21 each have different elastic effects on vibration frequencies, it is possible to suppress imaging of a wide range of frequencies occurring in the gimbal 11.

Note that the damper part 020 and the silicone adhesive 21 used in the above embodiment must each have enough elasticity to suppress the vibration of the gimbal 11 and to sufficiently obtain the original flexible effect of the gimbal 11. Of course.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to suppress vibrations of the gimbal having a wide range of vibration frequencies during read/write operations. Therefore, it is possible to suppress a state in which the gimbal resonates, and to prevent a situation in which the magnetic head moves and the contact state with the disk becomes unstable. Thereby, the state of contact of the magnetic head with the disk can be stabilized at all times, and stable read/write operations can be realized.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing the configuration of a magnetic head device of a floppy disk drive according to an embodiment of the present invention, FIG. 2 is a perspective view showing a partial configuration of a conventional magnetic head device, and FIG. 3 is a conventional magnetic head device. FIG. 2 is a side sectional view showing the configuration of the magnetic head device of FIG. 10...Magnetic head, 11...Gimbal, 12...
・Carriage body, 20... Damper member, 21...
Silicone adhesive. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Scope of Claims] A magnetic head device for a floppy disk drive comprising a gimbal fixed to a carriage body and a magnetic head held by the gimbal, wherein the side of the gimbal opposite to the surface on which the magnetic head is attached. a damper means disposed in the space of the carriage body so as to be in contact with the surface of the carriage body using a silicone adhesive, and comprising two layers of an elastic member and the silicone adhesive for suppressing vibrations acting on the gimbal. A magnetic head device for a floppy disk device, characterized by comprising: