JPS6348673A - Magnetic head support mechanism - Google Patents

Abstract

PURPOSE:To improve the reliability of a recording/reproducing signal by forming a projection to an elastic part of a member used in common and mounting a damper member to a part to be fixed in contact with the said projection so as to make the floating of a core slider stable even if an external disturbance is caused in a magnetic disk device. CONSTITUTION:The projection 27 improving the rigidity of the elastic part 25 is provided to the elastic part of the member 22 used in common. Further, the damping member 28 in contact with the projection 27 at a proper weight is provided to a fixed part 26. In case of the core slider 11 floated, if an external disturbance due to the air flow attended with the rotation of the magnetic disk and the vibration of the guide arm of the carriage is caused in the device using the magnetic head, the elastic part 25 of the member 22 is vibrated vertically or in the torsional direction and it might cause the floating of the core slider 11 unstable. Since the projection 27, however, is provided to the elastic part 25 and the rigidity of the elastic part 25 is enhanced, the vibration caused to the elastic part 25 is reduced surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic head support mechanism, and more particularly to a magnetic head support mechanism suitable for supporting a core slider floating above a magnetic disk with a minute gap in a magnetic disk device. .

[Conventional technology]

As a conventional technique for this type of magnetic head support mechanism, there is a known technique disclosed in Japanese Patent Laid-Open No. 55-22296.

As shown in FIGS. 6 and 7, this known technology includes a flexible body 2 that is a gimbal that holds a core slider 1, an elastic part 5 that supports this flexible body 2, and a load beam part 4. The flexible body 2 includes a member 3 that also serves as a member 3, and a load protrusion (not shown) disposed between the member 3 that serves as a member 3 and a central tongue-shaped portion of the flexible body 2.

When the magnetic disk rotates, the load protrusion allows the core slider 1 to quickly respond to changes in the air bearing, thereby moving the core slider onto the magnetic disk surface regardless of changes in the shape or shape of the magnetic disk. It is configured so that it can be followed.

C Problems to be Solved by the Invention] By the way, the conventional magnetic head support mechanism shown above is susceptible to disturbances within the magnetic disk device, such as vibrations of the guide arm (not shown) of the carriage that fixes the dual-purpose member 3. ,(
is excited and vibrates due to the airflow caused by the rotation of the air disk. Especially dual-purpose member 3. Since the flexible body 2 is formed from an extremely thin plate material, bending pieces 6 are provided on both sides of the load beam portion 4 of the dual-purpose member 3 to increase rigidity, but as shown in FIG. The elastic part 5 will be significantly vibrated. Therefore, there is a problem that the floating of the core slider 1 becomes unstable and the recording and reproduction signals are disturbed.

In addition, in order to solve the above problem, when trying to increase the rigidity of the elastic part by increasing the thickness and plate width of the elastic part 5,
Since the increase in weight is large relative to the ratio of increase in rigidity,
There is a problem in that it is difficult to obtain good flying characteristics of the core slider 1, and therefore, it is difficult to manufacture it easily.

In view of the above circumstances, it is an object of the present invention to provide a magnetic hand support mechanism that stabilizes the floating of a core slider and increases the reliability of recording/reproducing signals even if a disturbance occurs within a magnetic disk drive, and that can be easily manufactured. It is about providing.

[Means for solving problems]

In the present invention, the elastic portion of the dual-purpose member is provided with a protrusion that can increase the rigidity of the elastic portion. A damping member is attached to the fixed portion of the dual-purpose member, and is capable of contacting the protrusion with an appropriate load and damping vibrations generated in the elastic portion.

[Effect]

When a disturbance occurs within the magnetic disk drive, the magnetic head support mechanism, especially the elastic portion of the dual-purpose member, vibrates, which may make the core slider's flying unstable. However, since the elastic part is provided with a protrusion and the rigidity of the elastic part is increased, vibrations occurring in the elastic part can be reduced without increasing the thickness or plate width of the elastic part. Moreover, the damping member contacts the protrusion with elastic force, and the vibration of the elastic portion is absorbed and alleviated by the elastic force, so that the vibration can be further damped. Therefore, the vibration of the entire magnetic head support mechanism can be reduced, so that the floating of the core slider can be stabilized, and as a result, even if a disturbance occurs within the apparatus, the reliability of recording and reproduction signals can be improved.

In addition, as mentioned above, since the damping member is in contact with the protrusion and is attached to the fixed part, the contact area is always constant, which prevents variations in the elastic load on the elastic part of the damping member. Since the rigidity of the elastic portion is increased without increasing the width, the flying characteristics of the core slider are not impaired, and the magnetic head support mechanism can be manufactured easily.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 1 is a schematic diagram of the main parts of a magnetic disk device to which the magnetic head support mechanism of the present invention is applied, and FIG.
ib) is a plan view and a front view showing one embodiment of the CD air hand support mechanism of the present invention, and FIG. 3 is A-A in FIG.
A line sectional view, FIG. 4 is an explanatory diagram of the operation of the magnetic head support mechanism,
FIG. 5 is a vibration characteristic diagram comparing the embodiment of the magnetic head support mechanism and the conventional example.

As shown in FIG. 1, the magnetic head support mechanism 20 of the embodiment holds the core slider 11 at one end, and is connected to the guide arm 13 of the carriage 12 at the other end, so that when the magnetic disk 14 rotates, By driving the carriage 12, the core slider 11 is moved in the radial direction of the magnetic disk 14, so that the core slider 11 floats to a desired position on the magnetic disk with a small gap.

As shown in FIGS. 2 and 3, the magnetic head support mechanism 20 includes a girval 21 that holds the core slider 11 and a dual-purpose member 22 that supports the girval 21. The Zirval 21 is formed of an extremely thin (several μm) and elastic metal plate, similar to the dual-purpose member 22, and is provided with dimples (not shown) so that it can follow fluctuations in the surface of the magnetic disk 14. There is. The dual-purpose member 22 supports the Jirbal 21 at the negative end,
and a load beam section 24 provided with bent pieces 23 on both sides.
and an elastic section 2 extended to the other end of the load beam section 24.
5 and the guide arm 13 of the carriage 12 which is extended to the tip of the elastic portion 25 and is connected to the guide arm 13 of the carriage 12 via a spacer (not shown) or the like.
The fixed part 26 is attached to the fixed part 26. In this dual-purpose member 22, when the fixed part 26 is fixed to the guide arm 13, the load beam part 24 urges the core slider 11 held by the gimbal 21 in the direction of the surface of the magnetic disk 14 by the elastic force of the elastic part 25. The core slider 11 is made to float above the surface of the magnetic disk 14 with a minute interval by balancing the biasing force with the lifting force due to the airflow generated by the rotation of the magnetic disk 14.

The elastic portion 25 of the dual-purpose member 22 is provided with a protrusion 27 that can increase the rigidity of the elastic portion. The protrusion 27 has a hemispherical shape and is protruded toward the magnetic disk 14 by pressing or the like at a desired position on the center line connecting the load beam part 24 and the fixing part 26 in the elastic part 25. The rigidity of the portion 25 itself is increased.

Further, a damping member 28 that contacts the protrusion 27 with an appropriate load is installed on the fixed portion 26. The damping member 28 is composed of an elastic body, and one end thereof is attached to the fixed part 26 of the dual-purpose member 22 by laser welding or the like, and the other end contacts the protrusion 27 to exert its elastic force. As a result, a load is applied to the elastic portion 25 in a direction opposite to the direction of the magnetic disk 14. When vibration occurs in the elastic part 25, the damping member 28 absorbs and alleviates the vibration of the elastic part 25 by the elastic force of contact with the protrusion 27, thereby making it possible to drastically dampen the vibration generated in the elastic part 25. .

Since the magnetic head support mechanism 20 of the embodiment has the above-mentioned configuration, its operation will be explained next.

When the magnetic disk 14 rotates, the core slider 11 held by the gimbal 21 of the magnetic head support mechanism 20 floats to a predetermined position on the surface of the magnetic disk 14 and rotates the magnetic disk 1.
4 or read data from the magnetic disk 14.

When the core slider 11 flies, the air flow accompanying the rotation of the magnetic disk 14 and the guide arm 13 of the carriage 12
When disturbances such as vibrations occur in the device, the magnetic head support mechanism 20 vibrates, especially the elastic portion 25 of the dual-purpose member 22, in the vertical direction and torsional direction as shown in FIG. There is a risk of unstable levitation.

However, since the projection 27 is provided on the elastic portion 25, the elastic portion 25
Since the rigidity of the elastic part 25 is increased, vibrations occurring in the elastic part 25 can be reliably reduced without increasing the thickness or plate width of the elastic part. Moreover, the damping member 28 comes into contact with the protrusion 27 with a certain degree of elastic force, and the vibration of the elastic part 25 is absorbed and alleviated by the elastic force of the damping member 28.
5 vibrations are further damped. As a result, the vibration of the magnetic and rad support mechanism 20 as a whole is reduced, so that the floating of the core slider 11 is stabilized.

FIG. 5 shows the vibration characteristics of the magnetic head support mechanism 20 when the magnetic disk 11 is rotated and the core slider 11 is floated. The horizontal axis shows frequency components of vibration in the range of 0 to 5 KHz, and the vertical axis shows the intensity of each frequency component, that is, the vibration amplitude of the magnetic head support mechanism 20. According to this, the magnetic head support mechanism 20 according to the embodiment is as follows:
The vibration amplitude at the natural frequency is approximately half that of conventional magnetic head support mechanisms, making it possible to improve vibration characteristics. Therefore, it is clear that the floating of the core slider 11 can be made more stable.

Further, since the damping member 28 is attached to the fixed portion 26 and is in elastic contact with the protrusion 27, the contact area is always constant, and variations in the elastic load of the damping member 28 on the elastic portion 25 can be prevented. Moreover, the rigidity of the elastic part against vibrations is increased without increasing the thickness or width of the elastic part itself, so that the flying characteristics of the core slider 11 are not impaired.

〔Effect of the invention〕

As described above, according to the present invention, a protrusion that can increase the rigidity of the elastic part is formed on the elastic part of the dual-purpose member, and contacts the protrusion with an appropriate elastic force to damp vibrations generated in the elastic part. A damping member that can be attached to the fixed part can reduce the vibration of the magnetic head support mechanism by both the damping member and the protrusion, thereby stabilizing the flying of the core slider, and also preventing the flying characteristics of the core slider 11 from being impaired. Since there is no interference, even if a disturbance occurs in the magnetic disk device, the reliability of the recording/reproduction signal can be improved, and it is also easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a schematic view of the main parts of a magnetic disk device to which the magnetic node support mechanism of the present invention is applied, and FIG. 2 (al and (b)
1 is a plan view and a front view showing an embodiment of the magnetic head support mechanism of the present invention, FIG. 3 is a sectional view taken along the line A-A in FIG. A diagram explaining the action of
Fig. 5 is a vibration characteristic diagram comparing an embodiment of the magnetic head support mechanism and a conventional example, and Fig. 6 (al and Cb) is a plan view and a front view showing an example of the configuration of the conventional magnetic head/nod support mechanism. ,
FIG. 7 is a sectional view taken along the line B-B of FIG. 6(a), and FIG. 8 is an explanatory diagram of the conventional example during vibration. 20... Magnetic head support mechanism, 21... Gimbal,
22... Dual-purpose member, 24... Loading beam part, 25
... elastic part, 26 ... fixed part, 27 ... protrusion,
28... Damping member. Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 2 21 / Ensemble 25 Zenkyubang 28 Qiliang Ganzai Figure 4 Figure 5 - 9 gravity Zhou Yanzhimo〈, (at Hz) Figure 6 Figure 8 Figure→ (1 person)

Claims (1)

[Claims] 1. In a magnetic head support mechanism comprising a gimbal that holds a core slider and a dual-purpose member that supports the gimbal and has a load beam part, an elastic part, and a fixed part, the elastic part of the dual-purpose member A magnetic head support, characterized in that a damping member is attached to the fixed part, forming a protrusion capable of increasing the rigidity of the elastic part, and contacting the protrusion with an appropriate load to damp vibrations generated in the elastic part. mechanism.