JPH076561A - Z-height control system of hard disk - Google Patents

Abstract

PURPOSE:To improve productivity by facilitating the mounting/replacement of a suspension provided with an extremely small Z-height, and to attain a head load (dynamic load) during the rotation of a disk by making enable a direct measurement of the Z-height. CONSTITUTION:Magnetic heads to perform a dynamic test for a suspension fixing device 200 against the hard disk 1 are provided respectively on the vertical upper/lower parts, and leaf spring suspensions 3A, 3B to respectively support the magnetic heads are provided at the tip, and a projecting tang and a base plate to press the tang from the surface side of the hard disk 1 are provided at the rear end. Head jigs 31 are provided for freely attachably/detachably inserting and holding the suspensions 3A, 3B between the base plate. By this arrangement, a magnetic head loading device 300 and the head jigs 31 are respectively mounted freely movably in parallel at the tips to make the Z-height from the reference surface of the suspension to the hard disk 1 to be freely adjustable, then the head loading during the rotation of the hard disk is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hard disk (H
D) and a hard disk Z-height management system that allows easy adjustment of the Z-height and allows frequent replacement for performing dynamic characteristic tests of the magnetic head.

[0002]

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

The magnetic head is built into a leaf spring having a gimbal structure, which is usually called a suspension (HG
A: Head Gimbal Assembly), which is the mounting reference surface for fixing this suspension (HGA) and HD.
The gap with the surface is called the Z height, and its setting condition is important. Conventionally, HGA is fixed by using screws or a pressing plate. However, as the size of HGA has been reduced in recent years, the Z height becomes extremely small, and the above method is becoming difficult to carry out.

Therefore, methods such as using a set screw hole or a boss hole of the HGA to hang a pin therein and pulling it in, or a method of adhering the HGA to a reference surface have been used.
On the other hand, as a load / unload mechanism of a conventional magnetic head, a wedge is inserted into a gap between a suspension (HGA) and a disk (HD) to bend the suspension (HGA) or a hinge mechanism is used to open and close the suspension. The method etc. were adopted.

[0005]

By the way, in the case of the conventional pin system, the clamping force for bringing the suspension (HGA) into close contact with the reference surface is insufficient, and the Z height accuracy,
There was a problem with parallelism and mounting rigidity. Further, in the case of the adhesive method, although problems such as Z height accuracy, parallelism, and mounting rigidity are solved, not to mention the inefficiency at the time of head replacement, especially for a head tester whose mission is head replacement. There was a problem that it could not be applied.

In the case of the conventional method of inserting the wedge between the suspension (HGA) and the disk (HD), the Z height tends to become smaller, so that the wedge insertion method cannot be used.

An object of the present invention is to provide a suspension (HG) having a very small Z height in order to solve the above problems.
A) A hard disk Z height management system that can be easily installed and replaced and can measure the Z height directly and that can perform head load (dynamic load) during disk rotation. 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 to perform a dynamic characteristic test, and the magnetic head is provided at the tip. A leaf spring suspension for supporting, a projecting piece projecting at the rear end of the suspension, a holding plate for holding the protruding piece from the surface side of the hard disk, and the suspension between the holding plate. A suspension fixing device comprising a magnetic head clamp jig that is detachably sandwiched; and the magnetic head clamp jig, which is mounted in parallel to each end of the magnetic head clamp jig, so that a Z from the reference surface of the suspension to the hard disk Magnetic head load with adjustable height and head load during rotation of the hard disk
A spin stand device provided with a vertically movable micro gauge and an indicator for adjusting the Z height between the head clamp jigs on a rotatably provided spin stand. Is a hard disk Z height management system.

[0009]

By adopting the hard disk Z height management system of the present invention, the suspension fixing device is hardened.
A magnetic head for performing a dynamic characteristic test on a vertical disk is provided vertically above and below, and a leaf spring suspension for supporting the magnetic head is provided at the tip, and a protruding piece and a hard disk that project at the rear end of the suspension are provided. A pressing plate that presses the protruding pieces from the surface side of each of them is provided, and a clamping jig that holds the suspension in a detachable manner is provided between the pressing plate and the pressing head. It is mounted so that it can be moved in parallel, and the Z height from the reference surface of the suspension to the hard disk can be adjusted to allow head load while the hard disk is rotating. Since the Z height of the can be adjusted, it is easy to install and replace a suspension with a very small Z height. 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 now be described 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 of the present invention. In the figure, the 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 spin stand device 400 has a Z height
A tester 41 is mounted on a spin stand 40 rotatably mounted on a spindle 43, and comprises a large up / down micrometer 45 and an indicator 47, and a magnetic head clamp jig (head jig) of a suspension fixing device 200. The tool mounting surface 33 of the tools 31A and 31B is measured.

At this time, the suspension (HGA) is removed from the head jigs 31A and 31B, and the head mounting surface 3 is removed.
The probe 47a of the indicator 47 with 3 protruding
Can easily measure the head mounting surface 33,
While reading the scale on the indicator 47,
Micrometer 3 for adjusting the Z-height of the bonding device 300
5, the Z height is adjusted. 37
Is a height adjustment knob. In addition, the spin stand 40
Is horizontally slidable and can be moved to the 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 side suspension 3A and a bottom side suspension 3B which are vertically positioned above and below the hard disk (HD) 1, and a top side jig 7A which holds these suspensions 3A and 3B, respectively. It is composed of a bottom side head jig 7B.

Further, the head loading device 300
Is equipped with a top side head jig 7A and a bottom side head jig 7B for horizontal movement, and suspensions 3A, 3B vertically movable with respect to the hard disk 1 for the Z height. Also, it is configured to be easily adjusted for changing the thickness of the hard disk.

FIG. 3 is a state diagram of the suspension fixing device before being clamped, and FIG. 4 is a state diagram of the suspension fixing device after being clamped. 3 and 4, the states before and after the bottom side suspension 3B is clamped to the bottom side head jig 31B are shown. Head jig 31
The clamp plate 15 of B is configured so as to avoid the base plate 5 of the suspension 3B and press the flat portion of the front portion of the suspension 3B and the protruding portion (tongue) 13 of the rear portion from above. There is.

At this time, since the holding frame 19 has sufficient rigidity, it is possible to use the clam plate 15 with a plate thickness less than the base plate 5 (usually about 0.3 mm). is there. Therefore, even a magnetic head 2 having a small Z height can apply a sufficient holding force to the clamp plate 15 in the vertical direction without fear of interfering with the hard disk 1, and the adhesion is also 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 consisting of a support plate 5, a head holding frame 9 and a fixing screw 10,
A protrusion (tongue) 13 that protrudes further rearward from the rear end of the suspension 3B, a clamp plate 15 that presses the tongue 13 from the hard disk 1 side, and a head that is adhered to the clamp plate 15 so as to face it. The plurality of guide rods 17 inserted into the jig 31B, the holding frame 19 and the clamp plate 15 housed in the head jig 31B.
And a spring 21, which is an elastic member that imparts elasticity to the.

As shown in FIGS. 7 and 8, the bottom side suspension 3B has a through hole 2 formed in the base plate 5.
5 has a boss projecting downward in the drawing, and the hole 2
Hole 29 fitted in the head holding base 9
The suspension 3B, and screw holes 30A.
The head jig 31B is integrally configured by the fixing screw 10 that is screwed to the. A protruding piece 26 for holding a 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 equal to or less than that of the base plate 5, and a rectangular reference hole 11 is provided at the substantially central portion thereof. The base plate 5 is fitted in the reference hole 11 in the direction of the arrow, and the tongue 13 of the suspension 3B is inserted under the rear edge of the reference hole 11.

In this way, the base plate 5 of the suspension 3B is fitted in the reference hole 11 and the rear end face is positioned so as to abut against the edge of the clamp plate 15. Reference numeral 23 is a notch portion which is provided to prevent the magnetic head 2 from rising in the load state and has an angle of about 3 degrees.

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

In such a magnetic head 2, the first free
In this state, the magnetic head 2 is in contact with the surface of the hard disk 1, but the number of rotations of the hard disk 1 is about 1,000 rp.
When the high speed rotation of about m is reached, the air flow generated by the hard disk 1 causes the magnetic head 2 to start flying.
Further, at the rotational speed of 3,600 rpm in the load state, the magnetic head 2 is levitated from the surface of the hard disk 1 and the magnetic head 2 is about 0.
It maintains a gap of about 1 μm. In this way, since there is no contact between the magnetic head 2 and the hard disk 1 in the loaded state, the surface of the hard disk 1 and the head portion 3
It has no friction with a and can withstand long-term use.

The present invention is not limited to the above-mentioned embodiment, but can be carried out in other modes by making appropriate design changes, and the structure of the top suspension 3A and the head. 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 thus the description thereof is omitted.

[0025]

As is apparent from the above description, in the hard disk Z height management system of the present invention, the suspension fixing device is used to vertically and vertically move the magnetic head for performing the dynamic characteristic test on the hard disk. Each of them is provided with a leaf spring suspension that supports the magnetic head at the tip, and a tongue protruding at the rear end of this suspension and a base plate that presses the tongue from the surface side of the hard desk are provided. A head jig for removably sandwiching the suspension is provided between the base plate and the magnetic head loading device. -The Z height up to the hard disk can be adjusted to enable the head load while the hard disk is rotating. The Z height between the clamp jigs can be adjusted by freely providing a freely rotatable band, which effectively solves the problems of the prior art, and makes it easy to attach and replace a suspension with a very small Z height. The head height (dynamic load) can be measured during disk rotation.
It has the effect of making it possible.

[Brief description of drawings]

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

2 is a suspension fixing device and head of FIG.
It is a schematic explanatory drawing of a loading apparatus.

FIG. 3 is a state diagram of the suspension fixing device before being clamped.

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

5 is a front sectional view of FIG.

FIG. 6 is a plan view of FIG.

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

8 is an assembly view of the suspension shown in FIG. 7. FIG.

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

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

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

[Explanation 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)

[Claims] 1. A magnetic head provided vertically above and below a hard disk for performing a dynamic characteristic test, a leaf spring suspension for supporting the magnetic head at a tip thereof, and a suspension protruding at a rear end of the suspension. Magnetic suspension consisting of a protruding piece, a holding plate for pressing the protruding piece from the surface side of the hard disk, and a magnetic head clamp jig for detachably sandwiching the suspension between the holding plate and the holding plate. A fixing device; the magnetic head clamp jigs are attached to the respective ends so as to be movable in parallel, and the hard disk is fixed from the reference plane of the suspension.
A magnetic head loading device capable of adjusting the Z height up to the hard disk and enabling the head load during the rotation of the hard disk; and a head clamp jig on a spin stand rotatably provided. A hard disk Z height management system, comprising: a spin stand device provided with a vertically movable micro gauge and an indicator for adjusting the Z height between them.