JPH0218770A - Head supporting device - Google Patents

Abstract

PURPOSE:To obtain stable dynamic characteristic by causing the width of a magnetic disk in a radius direction to be wide in a gimbal spring and providing a slit in a spring part between first and second fixing parts. CONSTITUTION:For a gimbal spring 2, since the width of the magnetic disk is made wide in the radius direction, the bending rigidity of a magnetic head slider 1 is high in a positioning direction and the positioning characteristic of a head supporting device is caused to be stable. Further, a slit 8 is provided in the spring part between a first fixing part 5 and a second fixing part 6, and the magnetic head slider 1 is not interrupted to execute rolling and pinching motion along the radius direction of the magnetic disk. Thus, the stable dynamic characteristic can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a support device that levitates and supports a magnetic head slider with respect to a magnetic disk. The present invention relates to an in-line head support device configured to extend in the circumferential direction.

[Conventional technology]

A magnetic head slider used in a magnetic disk device needs to accurately read data by making the posture of the magnetic head slider follow the dynamic f position such as surface runout during rotational movement of the magnetic disk. For this purpose, conventionally, for example,
There is one published in Japanese Patent Publication No. 5B-288g7 etc. on 4:12. FIG. 4 is a perspective view showing a general head support device, and FIG. 5 is an exploded perspective view showing an enlarged main part of the conventional head support device. In the figure, (1)1
A magnetic head slider on which a magnetic head (not shown) is mounted, )21 is a gimbal mechanism with a gimbal mechanism, +31
[Magnetic disk, 14) is a load beam, 6) is a first fixed part fixed to the lIB air head slider Il+ of the gimbal spring 121, (6) is a second fixed part fixed to the load beam (41) of the gimbal spring 121 Part, 171H No. (1
) 1'21 with a pivot formed in the constant part 15), the load beam: 4) is in contact with the pivot (7) at the contact point (4a). In the figure, the %XX direction is the radial direction of the magnetic disk 1, the Y direction is the circumferential direction of the magnetic disk (3), the 2nd direction is orthogonal to the X direction and the Y direction, and the magnetic head slider ((1)?
This is the pressing direction in which the magnetic disk +3(1)c is pressed. !
In addition, the arrow tAli magnetic disk (310 rotations), the arrow IB+ indicates the magnetic head movement direction.

The load beam (41) is arranged so that its longitudinal direction is in the circumferential direction of the magnetic disk (31, that is, in the Y direction, and the magnetic head slider (1) is moved toward the magnetic disk 131 side, that is, in two directions, via the gimbal spring (pivot 17 of 21). Apply pressure.

The gimbal spring 121 ij is bonded to the magnetic head slider +l+ at the first fixing portion tel, for example. Further, the second fixing part (6) on the rear end side of the gimbal spring 12) is connected to the load beam 1 through a coupling means such as spot welding.
4) is fixed.

The magnetic disk (31 rotates in the direction of arrow A, and the magnetic head slider Ill [moves in the direction of arrow B. Magnetic head slider + (1) #: I', gimbal spring t2 + K
Therefore, the two magnetic head sliders are supported so as to be capable of pitching and rolling movements around the magnetic disk (radial direction cX-axis of 31) and the circumferential direction (Y@), and are configured so that the posture of the two magnetic head sliders can follow the dynamic changes of the magnetic disk 131. It's broken. Also, when the magnetic disk (31) rotates simultaneously, the air flowing between the ε air disk (31) and the magnetic head slider eye 1 creates an air spring that acts. In order to apply a necessary load of 1.1V to the magnetic head slider, the load beam (41 is a contact hole a) contacts the pivot 171K and pressurizes the magnetic head slider II.

[Problem to be solved by the invention]

A conventional head support device is configured as described above.
When the magnetic head slider (1) 1 is subjected to high-speed fraying, for example, in the direction of arrow B, a force is applied in the direction of the gimbal spring 2+KX, resulting in deformation of the gimbal spring tit. 6th
The figure is a plan view showing an example of deformation of the gimbal spring 121, where the solid line represents the deformed gimbal spring, and the one-dot line represents the gimbal spring in its normal state. Such a force in the X direction is directly applied to the pivot (71) that is in contact with the load beam 14+, thereby causing the pivot 17 to skid in the X direction. FIG. 7 shows the magnetic head slider I versus the driving force VC of the head support device using the deformed gimbal spring 12).
1 is a graph showing a transfer function of acceleration in the X direction of ll,
The X-axis shows the same wave number of the driving force (KH2I total 2I shows @, phase (DejFree) in FIG. 7 +al - Ga1n [dB) in FIG. 7 fbl. As shown in the figure, the same wave number is 1. γKHz ~ 2,1KHz
At this point, a resonance peak occurs due to the X-direction bending motion of the gimbal spring 21. As a result, the driving force is not transmitted accurately.

There was a problem that the positioning collateral system became unstable.

In addition, as shown in FIG. 8VC, the magnetic head slider I (
1) @(1) Fixed portion 151 is extruded by a press. Therefore, since the surfaces of the first fixed part 151 and the other gimbal springs are not on the same plane VC, when force is applied in the X direction, the difference between the first fixed part (6) and the second fixed part (6) When the spring part (hatched part) is subjected to torsional force, it bends with twisting and becomes weaker in the X direction.

Therefore, there was a problem that the characteristics when positioning the magnetic head slider Il+ were adversely affected. This invention was made to solve the above problems. Head support bag [1! The purpose is to provide

[Means to solve the problem]

The head support device according to the present invention increases the width of the magnetic disk in the radial direction in the gimbal gene and
A slit is provided in the spring part between the J1 fixing part and the second fixing part.

Another aspect of the present invention is to provide the magnetic head slider with a concavo-convex portion so that the first +I! i1 constant part
It is constructed so that it is on the same level as the first two fixed parts.

[Effect]

Is the gimbal spring in this invention the width of the magnetic disk in the radial direction? Because it is wide, the bending rigidity in the positioning direction of the magnetic head slider is high and the head is supported! The positioning characteristics of it are stabilized.

Further, a slit is provided in the spring portion between the first fixed portion and the second fixed portion, so that rolling and pitching movements of the magnetic head slider around the radial force direction of the magnetic disk are not hindered.

Further, the gimbal spring in another aspect of the present invention is provided on the magnetic head slider and is configured so that the first fixing part and the second fixing part are on the same level due to fC unevenness, and the rigidity of the gimbal spring in the bending direction is I can raise it.

Roughly speaking, the unevenness provided on this magnetic head strike is configured so that the gimbal spring is not 4 iML on the magnetic head slider when pitching and rolling are interlocked, and the positioning characteristics of the head support device are stabilized.

[Actual slack case]

Hereinafter, an example of an FM according to the present invention will be explained with reference to the drawings.

FIG. 1 is an enlarged exploded perspective view of a main part of a head support device according to an embodiment of the present invention, which is exploded in a direction of 1 meter perpendicular to a magnetic disk. In the figure, the gimbal spring (2
In this embodiment, the width in the X direction of 1 is set to be several times larger than the conventional moment of inertia in the X direction.

A gimbal spring (21 is used with a width in the X direction of approximately 8431+several 100 μm. Approximately several 100 μIn 8 degrees is the increase. (8) is the first fixed part 16) and the second fixed part (
This is a slit provided in the threaded part between 6). Is this slit (8) the width of the gimbal spring 121? This is to reduce the increase in screw rigidity due to widening, and is provided so that the twisting force remains the same as before.

The gimbal spring (21) according to this implementation row is capable of bending in the positioning direction (1) without interfering with the pitching and rolling movement around the X and Y axes of the magnetic head slider +ii.
In order to improve the performance, as shown in FIG. 1, the spring #A in the X direction that supports pitching and rolling motions is widened to increase the second moment of inertia of the bending section in the X direction. moreover.

In order to maintain the flexibility of pitching and rolling motions, a sling is provided at f81' in this spring section.

Reduced screw υ rigidity. As a result, it is possible to obtain a stable head support device with high bending rigidity in the positioning direction of the gimbal spring (21) without impairing the pitching and rolling motions of the magnetic hent slider (1) around the X and Y axes. is VC1 on both sides as shown in Figure 1.
It can be shaped like a slit for each book, or it can be shaped like a hollowed-out spring part, as shown in Figure 8. Also, other shapes may be used.

In addition, in the embodiment of the present invention, the gimbal spring 12) shown in FIG. 3 and the magnetic head slider fll' shown in FIG.
It is a perspective view shown in i. In FIG. VC, (9a) is a concave portion provided in the magnetic head slider, and (9b) is a convex portion. The level difference between the concave and convex portions is configured to exceed the torsional amplitude of the gimbal spring (21).
If the t81 fixing part 161 is fixed in b), the first fixing part -
Spring part of the cabinet of 61 and 1ip12 fixed part (Tutun slanted gravel)
will face the recess (9a,) of the magnetic head slider 10. In this real example:

As shown in FIG. 9, the first fixed part 16: is pushed out by the press, and the first fixed part ial of the gimbal spring (21 and @22 constant part (6) are at the same level, that is, almost the same). It can exist within a plane.

Therefore, when positioning the magnetic head slider Il+,
Even if a force is applied in this direction, the torsional force generated at this time can be reduced, and the rigidity in the X direction can be increased compared to the conventional one.

Furthermore, there is a dent in the part of the magnetic head slider other than the fixed part (6) of the gimbal spring 121! 4<(9a)
1 prevents the gimbal spring (2) and the magnetic head slider (1) from coming into contact with each other. This prevents the magnetic head slider +ll from pitching and rolling motion around the radial direction of the magnetic disk. Instead, the bending rigidity (f) in the positioning direction of the gimbal spring 12) can be increased, and a head support device with stable dynamic characteristics can be obtained.

In the above example, the protrusion r9b) of the magnetic head slider (1) is provided on the entire surface of the first fixing portion 6) of the gimbal spring, but it may be provided on a portion thereof.

Although the housing has a concave portion (9b) and a convex portion (9a), the same effect as described above can be obtained by simply providing a convex portion in the portion facing the first fixing portion 6 (of the conventional magnetic head slider il+). be able to.

〔Effect of the invention〕

A magnetic head slider carrying a magnetic head that moves in the radial direction of the magnetic disk, whose longitudinal direction is arranged in the circumferential direction of the magnetic disk, and a load beam that presses the magnetic head slider toward the magnetic disk, and which can be fixed to the magnetic head slider. A gimbal spring that has a running part on the first fixed part and the support 21 fixed to the load beam, and supports the magnetic head slider so as to be capable of rolling and pitching movements around the radial direction of the magnetic disk, using a pivot in contact with the load beam as a fulcrum. In a fully equipped head support device, the magnetic head slider can be magnetically The bending rigidity in the positioning direction of the gimbal spring can be increased without hindering the rolling and pitching movements around the radial direction of the disk, and it is possible to provide a head support device having stable childhood performance.

According to another invention of this invention, there are uneven parts on the magnetic head slider? The first fixing part of the gimbal spring is fixed to the second
By configuring it to be on the same level as the fixed part, the bending rigidity in the positioning direction of the gimbal spring is increased without hindering the rolling and pitching movements of the VC magnetic head slider around the radial direction of the magnetic disk, as described above. This has the effect of being able to provide a head support device #t with stable dynamic characteristics.

[Brief explanation of the drawing]

FIG. 1 is an enlarged exploded perspective view of the main parts of a head support device according to one embodiment of the present invention, exploded in a direction perpendicular to the magnetic disk surface, and FIG. 2 is an exploded perspective view of another embodiment of the present invention. [3'lJ] FIG. 8 is a perspective view showing a gimbal spring and magnetic head slider of a head support device according to still another embodiment of the present invention; FIG. 4 is a general view FIG. 5 is an exploded perspective view of essential parts of a conventional head support device; FIG. 6 is an explanatory diagram showing m-1 of deformation of the gimbal spring in the conventional head support device; 7Figure 1al*fb
l V'i, a graph showing the phase of the transfer function of acceleration in the moving direction of the magnetic head slider held in a conventional head support device for the same wave number, a graph showing the gain versus frequency, and Fig. 8 shows a modification of the conventional gimbal spring. FIG. 6 is an explanatory diagram showing another example. II----Magnetic head slider, +21---Gimbal spring, +S+---Magnetic disk, +41-
---1 row F beam% +61----1st fixed part, +e
+---Second fixed part, (7)---Pivot, +8
1----Slit, (9a)--One recess, (9b)-
-One convex part. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. ta a concave part b - convex seven doors Fig. 4 J 7 tai main air de Umata 2 Fig. 7 Er - LKHz)

Claims (2)

[Claims] (1) A magnetic head slider carrying a magnetic head that moves in the radial direction of a magnetic disk, a load beam whose longitudinal direction is arranged in the circumferential direction of the magnetic disk and pressurizes the magnetic head slider toward the magnetic disk; The magnetic head slider has a first fixing part fixed to the magnetic head slider and a second fixing part fixed to the load beam, and the magnetic head slider is moved around the magnetic disk in the radial direction using a pivot in contact with the load beam as a fulcrum. In a head support device including a gimbal spring that supports rolling and pitching movements, the width of the magnetic disk in the gimbal spring in the radial direction is increased, and a slit is provided in a spring portion between a first fixing portion and a second fixing portion. A head support device characterized by being provided with. (2) a magnetic head slider carrying a magnetic head that moves in the radial direction of the magnetic disk; a load beam whose longitudinal direction is arranged in the circumferential direction of the magnetic disk; and a load beam that presses the magnetic head slider toward the magnetic disk; The magnetic head slider has a first fixing part fixed to the magnetic head slider and a fixing part fixed to the load beam, and the magnetic head slider is rolled and moved around the magnetic disk in the radial direction using a pivot in contact with the load beam as a fulcrum. A head support device equipped with a gimbal spring that supports pitching motion, characterized in that the magnetic head slider is provided with an uneven portion, and the first fixed portion of the spring is configured to be on the same level as the second fixed portion. head support device.