JP3137170B2 - Magnetic head loading unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading unit that mounts a magnetic head and loads a magnetic disk in a magnetic disk inspection apparatus.

[0002]

2. Description of the Related Art Recording performance of a hard magnetic disk (hereinafter simply referred to as "disk") used in an information processing system is inspected by a disk inspection apparatus at a manufacturing stage. FIG.
1 shows a schematic configuration of a main part of a disk inspection device. However, in modern disk driver, match the magnetic head in the direction of the track T _R of the disc, it is so-called in-line method is used, which in accordance with this disk inspection apparatus also an in-line system. Disk 1 to be inspected
Is mounted on the spindle 2 and rotates θ. Disc 1
The head arm assemblies 3A and 3B are composed of magnetic heads (hereinafter simply referred to as heads) 31a and 31b and support arms 32a and 32b corresponding to the front and back surfaces of the loading bar. A loading mechanism 4 having 42a and 42b, a moving section 51, and a motor (M) 52;
And a carriage mechanism 5 including a mounting portion 53. The mounting portion 53 has a U-shaped cross section as shown in the figure, and the two support arms 32a and 32b are mounted on the upper and lower surfaces inside the mounting portion 51 in a direction perpendicular to the mounting direction, that is, in an inline direction.

In the inspection, when the moving section 51 is moved by the rotation of the motor (M) 52, the disk 1 enters the inside of the mounting section 53, and the two heads 31a and 31b are moved to predetermined tracks T _{R on} both sides of the disk 1. To seek. When the driving mechanism 41 is operated, the loading bars 42a and 42b are lowered and raised as shown by arrows D and U, respectively, as shown in the attached drawings, and the two support arms 32a and
32b becomes the position of the dotted line, both heads 31a, 31b is examined are loaded in-line with respect to the track T _R is made. Since the characteristics of the two heads 31a and 31b gradually deteriorate with the continuation of the inspection, the heads 31a and 31b are replaced with new ones, for example, once a day.

[0004]

Now, the miniaturization of disks has been increasingly advanced, and the size has been reduced from 3.5 inches to 2.5 or 1.8 inches, and the supporting arms have been correspondingly miniaturized. ing. For such a small disk and supporting arm, the mounting portion 53 and the loading mechanism 4 also need to be downsized, but this has a problem. In FIG. 4, when the mounting portion 53 is miniaturized, the inside becomes narrower, and it is not easy to attach and detach the two support arms 32a and 32b to both the upper and lower surfaces and replace them. Also, both support arms 32a, 32
Since the gap G between b and the front and back surfaces of the disk 1 is very small, for example, about 0.5 mm at the position of the loading bars 42a and 42b, it is necessary that both loading bars 42a and 42b have extremely small diameters. Therefore, the strength is insufficient and the loading is not performed properly. The present invention has been made in view of the above, and has a reduced size of both support arms 32a, 32b.
It is an object of the present invention to provide a loading unit which can easily replace the heads and correctly load both heads 31a and 31b inline.

[0005]

According to the present invention, there is provided a loading unit for a magnetic head, wherein the disk inspection apparatus includes a frame which is freely detachable from a carriage mechanism. A head mounting mechanism having two rotary rods pivotally supported by the frame, mounting parts provided at front ends of the two rotary rods, and mounting a support arm of the magnetic head in an in-line direction; And a drive arm supported by a frame, two engagement plates provided at the front end of the drive arm and meshing with the respective gears, and provided on the carriage mechanism to drive the drive arm forward and backward. And a driving mechanism for moving the meshing plate forward and backward with respect to the gear to rotate both rotary rods at the same time. Further, as another invention, both the rotating rods are simultaneously rotated by replacing the gear with a roller, replacing the meshing plate with a cam, engaging the side surface of the cam with the roller, and moving the cam forward and backward with a drive arm. Things. Further, as another invention, the above-mentioned loading unit mounts the above-mentioned frame, and performs exchange work of exchanging the respective support arms with respect to the mounting portions of the two rotating rods of the mounted frame. It has a work table.

[0006]

The frame provided in the loading unit can be freely attached to and detached from the carriage mechanism. In the head mounting mechanism, a support arm is mounted in the in-line direction at a mounting portion at the front end of two rotating rods supported by the frame. In the loading mechanism,
When the drive arm is moved forward and backward by a drive mechanism provided in the carriage mechanism, two meshing plates or cams provided at the front end of the drive arm move forward and backward with respect to the gear or roller, and mesh with this. Both rotating rods rotate together with each gear or roller, and each support arm mounted on the mounting part of both rotating rods rotates around the rotating rod as described above, and each head is correctly positioned on both sides of the disc. Loaded inline. In the above-mentioned exchange worktable, the detachable frame is detached from the carriage mechanism and placed on the carriage mechanism, and each support arm can be easily attached to and detached from the mounting portion of the two rotating rods.
The replacement work is completed in a short time.

[0007]

1 and 2 show an embodiment of the present invention. FIG. 1 is a perspective external view of a loading unit 10, and FIG. is there.

In FIG. 1, a loading unit 10
Comprises a frame 6, a head mounting mechanism 7, and a loading mechanism 8, and a mounting work table 9 shown in FIG. However, the exchange work table 9 is portable and is installed at an arbitrary place. The frame 6 has a clamp portion 61 for attachment and detachment.
Can be attached to the moving part 52 of the carriage mechanism 5 and clamped or removed by operating the knob 611. The head mounting mechanism 7 is inserted into two rotating rods 71a and 71b pivotally supported by the frame 6, mounting parts 72a and 72b provided at the front ends thereof, and both rotating rods 71a and 71b. Springs 73a, 73b biasing in the direction of
And both stoppers 74a, 74b fixed to the rear ends thereof, and both rotating rods 71a, 71b are movable in the axial direction within the range of the stoppers 74a, 74b. In addition, both support arms 32a, 32b are mounted on both mounting portions 72a, 72b at right angles to the rotating rods 71a, 71b, that is, in an in-line direction via mounting aids 721. Replaced with a new one. However, the method of the replacement work will be described with reference to FIG. The loading mechanism 8 includes a drive arm 81 pivotally supported by the frame 6 and two engagement plates 82, 82 provided at the front end thereof.
b, the driving motor 831 and the driving arm 8
1, a drive mechanism 83 comprising a cam plate 841 engaged with the rear end, a stopper portion 84 comprising adjustable stoppers 841 and 842 provided at positions shown in FIG.
The gears 82a, 82b are fixed to the illustrated positions of 71a, 71b, and the gears 85a, 85b mesh with the meshing plates 82, 82b, respectively. Prior to the inspection, the height position is adjusted beforehand so that the height position with respect to the back surface is accurate.

The operation of the loading mechanism 8 will be described below with reference to FIG. However, the figure shows a loaded state. Rotation of the cam plate 832 in the direction of the arrow C ₁ by a driving motor 831 of the driving mechanism 83 moves, it pushes the rear end of the drive arm 81, two engagement plates 82a of the front end, in 82b the direction of the arrow C ₂ and, both gears 85a and mesh with both rotating rod 71a with 85b, 71b are rotated in the direction of loading as indicated by arrow C ₃ .C ₄ rebelled the urging force of the spring 73a, 73b. Due to this rotation, the two support arms 32a, 32b mounted on the mounting portions 72a, 72b rotate in the loading direction, and the two heads 31a, 31b move the tracks T _{R of the} disk 1 as shown.
Will be loaded inline correctly.

Next, referring to FIG. 2, the operation of exchanging the two support arms 32a and 32b in the exchange work table 9 will be described. The exchange work table 9 may have any shape as long as the frame 6 laid down sideways can be stably placed as shown in the figure. When the frame 6 is removed from the moving part 52 of the carriage mechanism 5 and is mounted on the mounting work table 9, and then the rotating rods 71 a and 71 b are pulled forward to the limit of the stoppers 74 a and 74 b, the gears 85 a and 85 b are moved Both meshing plates 82a, 82
Since the two rotating rods 71a and 71b become rotatable apart from b,
These are rotated in the directions of arrows C ₅ and C ₆ , and both mounting portions 72a,
Stop 72b in the position shown. The two support arms 32a and 32b are mounted on the upper surface of the mounting aid 721 in advance, and mounted on the stationary mounting portions 72a and 72b in the directions shown in the drawing. When both heads 31a, 31b are deteriorated, they are removed from both mounting portions 72a, 72b, and are replaced with new ones prepared in advance. Although the details of the mounting aid 721 are omitted, the structure is such that it can be easily positioned and mounted on the mounting portion 72, and can be easily removed. When the mounting or replacement of the support arms 32a and 32b is completed as described above, the frame 6 is moved again.
Inspection is performed by clamping to 52 and loading as described above.

As described above, the above-described loading unit 10 is an embodiment, and for example, the structure of the frame 6, the details of the head mounting mechanism 7, and the loading mechanism 8 are different from those in FIG. However, it is needless to say that the present invention is included in the present invention as long as the conditions described in claim 1 are satisfied.

In the embodiment described here, both rotating rods are used.
Gears 85a, 85b are provided on 71a, 71b to mesh with the meshing plates 82a, 82b to transmit the rotational driving force. The two rotating rods 71a and 71b may be rotated as a cam follower that engages the roller side with the side surface of the plate cam (the surface corresponding to the gear of the meshing plates 82a and 82b).

[0013]

As described above, in the loading unit according to the present invention, the frame can be freely attached to and detached from the carriage mechanism. The head arm is easily mounted, and when it deteriorates, it is easily removed and the replacement work is made more efficient, and each support arm mounted on both mounting parts rotates in the loading direction by the loading mechanism. Thus, each head is correctly loaded in-line with respect to tracks on both sides of the disk, and there is a great effect that contributes to improvement in the operation rate and reliability of the disk inspection device.

[Brief description of the drawings]

FIG. 1 is a perspective external view of a loading unit according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a method of replacing a head arm in a replacement workbench;

FIG. 3 is a schematic configuration diagram of a main part of the disk inspection device.

FIG. 4 is an explanatory diagram of a problem of a mounting portion and a loading bar for a miniaturized head arm.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hard magnetic disk or simply disk, 2 ... Spindle, 3, 3A, 3B ... Head arm assembly, 31 ... Magnetic head or simply head, 32 ... Support arm, 4 ... Loading mechanism, 41 ... Drive mechanism, 42 ... Loading bar, 5: carriage mechanism, 51: motor, 52: moving unit, 53: mounting unit, 6: frame, 61: clamp unit, 61
1 ... Knob, 7 ... Head mounting mechanism, 71a, 71b ... Rotating rod, 72
a, 72b: mounting part, 721: mounting aid, 73a, 73b: spring, 74a, 74b: stopper, 8: loading mechanism, 81
… Drive arm, 82a, 82b… Mating plate, 83… Drive mechanism, 831
... Drive motor, 832 ... Cam plate, 84 ... Stopper part, 841,84
2… Stopper, 85a, 85b… Gear, 9… Exchange worktable, 10
... the loading unit of the present invention.

Claims (2)

(57) [Claims] In a magnetic disk inspection apparatus, two magnetic heads are moved by a carriage mechanism to seek tracks on both front and back surfaces of a magnetic disk to be inspected, and to load and inspect the tracks in-line. A rotating frame supported by the frame, and two mounting rods provided at the front ends of the two rotating rods for mounting the support arm of the magnetic head in an in-line direction. A gear or roller provided on each of the rotating rods, a drive arm pivotally supported by the frame, and two drive gears provided at the front end of the drive arm and meshing with the respective gears. A cam that engages with the meshing plate or each of the rollers, and the cam that is provided on the carriage mechanism and that drives the drive arm so that the meshing plate or the front Loading mechanism and a driving mechanism for rotating the two rotary rods through a cam, characterized in that it consists of a, the magnetic head loading unit. 2. An exchange work table on which the frame is mounted and on which the two support arms are exchanged with respect to a mounting portion of the two rotating rods of the mounted frame. The loading unit of a magnetic head according to claim 1, wherein: