JP2771097B2 - Hard Disk Z Height Management System - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hard disk (H
D) The present invention relates to a hard disk Z-height management system that allows easy adjustment of the Z-height and enables frequent replacement in order to perform a dynamic characteristic test of the magnetic head.

[0002]

2. Description of the Related Art Conventionally, an apparatus for testing the dynamic characteristics of a hard disk (HD) and a magnetic head requires frequent replacement of the HD and the magnetic head.
A mechanism for performing the unloading and a mechanism capable of facilitating the exchange of the head are indispensable.

The magnetic head is incorporated in a leaf spring having a gimbal structure usually called a suspension (HG).
A: Used as a Head Gimbal Assembly), the reference mounting surface for fixing this suspension (HGA) and the HD
The gap with the surface is called Z height, and its setting condition is important. Conventionally, the fixing of the HGA has been performed using a screw or a holding plate, but in recent years, as the size of the HGA has been reduced, the Z height has become extremely small, and it has become difficult to implement the above method.

[0004] Therefore, a method of using a set screw hole or a boss hole of the HGA and hooking and pulling a pin into the hole or a method of bonding the HGA to a reference surface has been performed.
On the other hand, as a load / unload mechanism of a conventional magnetic head, a wedge is inserted into a gap between the suspension (HGA) and the disk (HD) to bend the suspension (HGA), or the suspension is opened and closed by a hinge mechanism or the like. The method was adopted.

[0005]

However, in the case of the conventional pin type, the clamping force for bringing the suspension (HGA) into close contact with the reference surface is insufficient, and the Z-height accuracy and
There were problems with parallelism and mounting rigidity. In the case of the bonding method, the problems of Z-height accuracy, parallelism, mounting rigidity, etc. can be solved. There was a problem that it could not be applied.

Incidentally, in the case of the conventional system in which a wedge is inserted between the suspension (HGA) and the disk (HD), the wedge insertion method cannot be used because the Z-height tends to be further reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a suspension (HG) having an extremely small Z height in order to solve the above problems.
A) A hard disk Z-height management system is provided, in which the mounting and replacement of A) can be easily achieved, the Z-height can be directly measured, and a head load (dynamic load) can be performed while the disk is rotating. Is to do.

[0008]

In order to achieve the above object, the present invention provides a magnetic head which is provided vertically above and below a hard disk and performs a dynamic characteristic test, and the magnetic head is provided at the tip. A leaf spring suspension to be supported, a projecting piece projecting from the rear end of the suspension, a holding plate for holding the projecting piece from the side of the hard disk, and the suspension between the holding plate. A suspension fixing device comprising a magnetic head clamp jig which is detachably clamped; and a magnetic head clamp jig which is mounted on a tip thereof so as to be movable in parallel, and a Z from the reference surface of the suspension to the hard disk. A magnetic head load capable of adjusting the height and enabling a head load during rotation of the hard disk.
A spinning device having a vertically movable microgage and an indicator on a rotatably provided spinstand for adjusting the Z height between the head clamp jigs; A hard disk Z-height management system.

[0009]

By using the hard disk Z height management system of the present invention, the suspension fixing device can be hardened.
A magnetic head for performing a dynamic characteristic test on a hard disk is provided vertically and vertically, and a leaf spring-like suspension for supporting a magnetic head is provided at the tip, and a protruding piece and a hard disk are respectively provided at the rear end of the suspension. A holding plate that presses the protruding pieces from the side of the surface is provided, and a clamp jig that detachably holds the suspension is provided between the holding plate and the holding plate, and the magnetic head loading device is attached to the tip of each clamp jig. It is mounted so that it can be moved in parallel, the Z height from the reference surface of the suspension to the hard disk can be adjusted, and the head load during the rotation of the hard disk is made possible. The Z-height of the suspension can be adjusted so that the suspension with a very small Z-height can be mounted and replaced. To be achieved, improves productivity, yet can measure the Z-height directly Heddoro during disk rotation - de (Dynamic B - De) makes it possible to.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic block diagram of an embodiment of a hard disk Z height management system according to the present invention. In the figure, a hard disk Z height management system 100 mainly includes a suspension fixing device 200, a magnetic head loading device 300, and a spin stand device 400.

The spinstand device 400 has a Z height
A tester 41 is mounted on a spin stand 40 rotatably provided on a spindle 43, and comprises a large micrometer 45 for up and down and an indicator 47, and a magnetic head clamp jig (head jig) of the suspension fixing device 200. ) For measuring the head mounting surface 33 of the components 31A and 31B.

At this time, the suspension (HGA) is removed from the head jigs 31A and 31B and the head mounting surface 3 is removed.
With the 3 protruding, the probe 47a of the indicator 47
Can easily measure the head mounting surface 33,
While reading the scale of indicator 47,
Height adjusting micrometer 3 of the sliding device 300
5, the Z height is adjusted. Note that 37
Is a height adjustment knob. Furthermore, the spin stand 40
Is slidable in the horizontal direction and has a Z-height reference plane (Fig. 1).
1) It is easy to measure the parallelism between 30 and the head mounting surface 33.

FIG. 2 is a schematic explanatory view of the suspension fixing device and the head loading device of FIG. In the figure, a suspension fixing device 200 includes a top suspension 3A and a bottom suspension 3B which are positioned vertically and vertically with respect to the hard disk (HD) 1, a top jig 7A which holds these suspensions 3A and 3B, respectively. And a bottom-side head jig 7B.

Also, a head loading device 300
Is provided with a top-side head jig 7A and a bottom-side head jig 7B at its tip so as to be movable horizontally, and suspensions 3A and 3B are provided vertically movable with respect to the hard disk 1 so as to be vertically movable. Also, it is easy to adjust to changes in the thickness of the hard disk.

FIG. 3 shows a state diagram of the suspension fixing device before clamping, and FIG. 4 shows a state diagram of the suspension fixing device after clamping. FIGS. 3 and 4 show a state before and after clamping the bottom suspension 3B to the bottom head jig 31B. Head jig 31
The B clamp plate 15 is configured to press the front flat portion and the rear protruding portion (tongue) 13 of the suspension 3B from above, avoiding the base plate 5 of the suspension 3B. I have.

At this time, since the holding frame 19 has sufficient rigidity, it is possible to use a plate thickness of the base plate 5 (usually about 0.3 mm) which is equal to or less than the base plate 5. is there. Therefore, even with the magnetic head 2 having a small Z-height, it is possible to apply a sufficient holding force in the vertical direction to the clamp plate 15 without fear of interfering with the hard disk 1 and the adhesion is sufficient.

FIG. 5 is a front sectional view of FIG. 4, and FIG. 6 is a plan view of FIG. 5 and 6, the magnetic head fixing device 200 includes a suspension 3B and a base in this embodiment.
A magnetic head clamp jig (head jig) 31B including a base plate 5, a head holding frame 9, and a fixing screw 10;
A protruding portion (tongue) 13 protruding further rearward from the rear end of the suspension 3B, a clamp plate 15 for pressing the tongue 13 from the hard disk 1 side, and a head bonded to the clamp plate 15 so as to face the same. A plurality of guide rods 17 inserted into the jig 31B, a clamp plate 15 housed in the holding frame 19 and the head jig 31B.
And a spring 21 which is an elastic member for imparting elasticity to the spring.

As shown in FIGS. 7 and 8, the bottom suspension 3B is provided with a through hole 2 provided in the base plate 5.
5 has a boss projecting downward in the figure,
7 and a hole 29 provided in the head holder 9.
, The suspension 3B is clamped, and the screw hole 30A is inserted.
The head jig 31B is integrally formed by a fixing screw 10 which is screwed to the head jig. A protruding piece 26 for holding the lead wire is provided on the rear side of the suspension 3B.

As shown in FIGS. 9 and 10, the clamp plate 15 is a thin plate having a thickness approximately equal to or less than that of the base plate 5, and is provided with a square reference hole 11 substantially at the center. The base plate 5 is fitted into the reference hole 11 from the direction of the arrow, and the tongue 13 of the suspension 3B is inserted under the rear edge of the reference hole 11.

As described above, the base plate 5 of the suspension 3B is fitted into the reference hole 11, and the rear end face is positioned so as to abut against the edge of the clamp plate 15. A notch 23 is provided for holding the magnetic head 2 from rising when the magnetic head 2 is in a loaded state, and has an angle of about 3 degrees.

The holding frame 19 is provided with an opening 28 that opens in the direction of the arrow, and the suspension 3B is accommodated in the opening 28. Further, the clamp plate 15 and the holding frame 19 are integrally bonded by an adhesive or the like. FIG. 11 is an explanatory diagram of the dynamic load operation. In the figure, the suspension 3B
The load position, the clamp position, and the free position are exaggerated from the actual state for explanation. In order to enable dynamic loading, the magnetic head 2 needs to be loaded while maintaining a posture as close as possible to the actual loading state.

The magnetic head 2 has the first free magnetic field.
In this state, the magnetic head 2 is in contact with the surface of the hard disk 1, but the rotation speed of the hard disk 1 is approximately 1,000 rp.
When the rotation speed reaches about m, the magnetic head 2 starts to fly due to the air flow generated by the hard disk 1.
Further, at a rotational speed of 3,600 rpm in a loaded state, the magnetic head 2 is floated from the surface of the hard disk 1 and is moved to about 0.
A gap of about 1 μm is maintained. As described above, since the magnetic head 2 does not contact the hard disk 1 in the loaded state, the surface of the hard disk 1 and the head 3
There is no friction with a, and it can withstand long-term use.

It should be noted that the present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate design changes. The fixing operation to the jig 31A and the like are the same as the configuration of the potom-side suspension 3B and the fixing operation to the head jig 31B, and therefore description thereof is omitted.

[0025]

As is apparent from the above description, the hard disk Z-height management system of the present invention uses the suspension fixing device to move the magnetic head for performing the dynamic characteristic test on the hard disk vertically and vertically. And a leaf spring suspension supporting the magnetic head at the tip, and a protruding tongue at the rear end of the suspension and a base plate for pressing the tongue from the surface of the hard disk. A head jig for detachably holding the suspension is provided between the base jig and the base plate. A magnetic head loading device is attached to each end of the head jig so as to be movable in parallel, and a magnetic head loading device is provided from the reference surface of the suspension. -The Z-height to the hard disk can be adjusted and the head load can be adjusted while the hard disk is rotating. In this way, the problem of the prior art can be effectively solved by easily adjusting the Z-height between the clamp jigs, and the mounting and replacement of a suspension having an extremely small Z-height can be easily achieved. The Z height can be measured directly, and the head load (dynamic load) can be measured while the disk is rotating.
C) is made possible.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a hard disk Z height management system of the present invention.

FIG. 2 shows a suspension fixing device and a head fixing device of FIG.
FIG. 3 is a schematic explanatory diagram of a loading device.

FIG. 3 is a view showing a state before clamping of the suspension fixing device.

FIG. 4 is a state diagram after clamping of the suspension fixing device.

FIG. 5 is a front sectional view of FIG. 4;

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a schematic configuration diagram of a suspension.

FIG. 8 is an assembly view of the suspension of FIG. 7;

FIG. 9 is a schematic diagram of a clamp plate.

FIG. 10 is a schematic diagram of a holding frame.

FIG. 11 is an explanatory diagram of a dynamic load operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard disk 2 Magnetic head 3A Top side suspension 3B Bottom side suspension 5 Base plate 7 Bed jig 9 Head holder 13 Tongue 15 Clamp plate 19 Holding frame 31 Head jig 33 Mounting surface 35 Adjustment micrometer 41 Z height tester 47 Indicator 100 Hard disk Z height management system 200 Suspension fixing device 300 Magnetic head loading device 400 Spin stand device

Claims (1)

(57) [Claims] 1. A magnetic head which is provided vertically and vertically with respect to a hard disk and performs a dynamic characteristic test, a leaf spring-like suspension which supports the magnetic head at a front end thereof, and protrudes from a rear end of the suspension. Magnetic suspension comprising: a protruding piece to be pressed; a pressing plate for pressing the protruding piece from the surface side of the hard disk; and a magnetic head clamp jig for detachably holding the suspension between the pressing plate. A fixing device; and the magnetic head clamp jigs are mounted on the respective ends so as to be freely movable in parallel, and the hard head is fixed from a reference surface of the suspension.
A magnetic head loading device capable of adjusting the Z height up to the hard disk and enabling a head load during rotation of the hard disk; and a head clamp jig on a rotatable spin stand. A hard disk Z-height management system, comprising: a spin stand device provided with an indicator and a micro-gage that can move up and down so that the Z-height can be adjusted.