JPH0721556A - Error generating angle positioning device for discoid recording medium - Google Patents

Abstract

PURPOSE:To position an actual error generating angle on a magnetic disk for which the numerical data of an error generating angle position can be obtained by an error measuring instrument. CONSTITUTION:At a main body 1 of this device, a case 11 of a magnetic disk 10 is fixed. A rotary magnet 3 attracts a hub 12 of the magnetic disk 10 and is linked with the hub 12 in the state of inserting an engage pin 4 to the driving hole of the hub 12 and being positioned in the rotating direction. An angle display panel 6 is provided with an angle scale and can be rotated integrally with the rotary magnet 3. When the magnetic disk 10 is rotated to an origin position together with the rotary display panel 6, a reference scale 7 is matched with the scale of an angle '0' on the angle display panel 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when evaluating a disk-shaped recording medium such as a magnetic disk, positions an actual error occurrence angular position on a magnetic disk for which numerical data of the error occurrence angular position has been obtained by an error measuring device. The present invention relates to an error occurrence angle positioning device for a disk-shaped recording medium.

[0002]

2. Description of the Related Art For quality control of magnetic disks, for example,
When analyzing the presence or absence of scratches in the manufacturing process and the situation, write / read on the magnetic disk with an error measuring machine to measure the presence or absence of an error.If an error is measured, the error occurrence angle The position is displayed.

However, since the error occurrence angular position is only displayed as numerical data on the display or on the print, in order to investigate the cause by observing the scratch or the like that caused the error with a microscope or the like, It is necessary to locate the error occurrence angle position on the actual magnetic disk and find the scratch or the like. Therefore, conventionally, an annular protractor scale is attached to one side of a transparent case for a magnetic disk that houses the magnetic disk together with the case so as to surround the hub,
In addition, a round hole having a size of a hub is made in the central portion, and the hub is rotated by hand to make an angle so that the error portion comes to the window portion of the magnetic disk case.

[0004]

However, it is very troublesome to perform angle adjustment by attaching a protractor scale to the case of each magnetic disk and rotating the hub by hand as in the conventional case. Met. In view of such circumstances, it is an object of the present invention to facilitate the actual positioning of an error occurrence angular position on a disk-shaped recording medium such as a magnetic disk.

[0005]

Therefore, according to the present invention, there is provided a case fixing portion for fixing a case of a disk-shaped recording medium,
A rotating portion that is positioned and connected in a rotational direction to a hub of a disk-shaped recording medium and is rotatable integrally with the hub, and a disc-shaped angle display attached to the rotating portion and integrally rotatable and having an angle scale. An error occurrence angle positioning device for the disk-shaped recording medium is configured by providing a plate and a reference scale that matches the angle 0 scale of the angle display plate when the disk-shaped recording medium is rotated to the origin position.

[0006]

After the numerical data of the error occurrence angular position on the disk recording medium is obtained by the error measuring machine, the disk recording medium is set on the error occurrence angle positioning device, and the disk fixing medium is fixed by the case fixing portion. Fix the case of. Next, the rotary portion is connected to the hub of the disk-shaped recording medium in the rotational direction so as to connect the rotary portion, and the rotary portion rotates integrally with the hub.

Next, the disc-shaped angle display plate which is attached to the rotating part and is rotatable integrally is rotated so that the angle 0 scale of the angle display plate coincides with the reference scale. As a result, the origin position of the disc-shaped recording medium comes to a predetermined position (for example, the center of the window of the case). Next, the angle display plate is rotated to match the angle scale corresponding to the numerical data of the error occurrence angular position with the reference scale. As a result, the actual error occurrence angular position of the disc-shaped recording medium comes to a predetermined position.

If the disc-shaped recording medium is taken out from the error-occurring angle positioning device in this state, the actual error-occurring angular position of the disc-shaped recording medium taken out is at a predetermined position, so that the error location can be easily observed. Become.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A magnetic disk (especially a 3.5-inch flexible disk cartridge) is used as the disk-shaped recording medium.
Take as an example. 1 is a side sectional view of an error occurrence angle positioning device according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a plan view of the same.

The apparatus main body 1 uses a chucking mechanism of a commercially available flexible disk drive (FDD), has a disk insertion portion 2 on the front surface, and a case 11 of a magnetic disk 10 inserted from this is chucked. It is fixed by the mechanism. Therefore, the apparatus main body 1 forms a case fixing portion. A hole is formed in the central portion of the upper wall of the apparatus main body 1, and a rotary magnet 3 forming a rotating portion is rotatably fitted in the hole. The lower surface of the rotary magnet 3 has a magnetic disk 11
It is adapted to face the metal hub 12 of. An engaging pin 4 is provided on the lower surface of the rotary magnet 3 so as to be urged by a built-in spring to project into the drive hole 12b at a position eccentric from the center hole 12a of the hub 12 of the magnetic disk 11. Is ready to go.

A mounting shaft 5 is provided at the center of rotation of the rotary magnet 3 so as to project upward.
A disc-shaped angle display plate 6 having an angle scale of 360 degrees is attached. In the figure, the angle scale is displayed every 10 degrees, but it is desirable to use the angle scale every 1 degree. Further, on the upper surface of the upper wall of the device body 1, the magnetic disk 10
When the magnetic disk 10 together with the angle display plate 6 is rotated to the original position with the engagement pin 4 on the side of the rotary magnet 3 protruding into the drive hole 12b of the hub 12, the angle 0 scale of the angle display plate 6 is set. There is provided a reference scale 7 corresponding to

In the figure, numeral 8 indicates the magnetic disk 10 which is the main body 1 of the apparatus.
The eject button 13 for pulling out the magnetic disk 10 is a window portion formed in the case 11 of the magnetic disk 10. Next, the usage method will be described. Magnetic disk 10 by error measuring machine
After the numerical data of the angular position of error occurrence is obtained, the magnetic disk 10 is inserted from the disk insertion portion 2 on the front surface of the apparatus main body 1 with the back surface (side where the hub 12 is exposed) facing up. The chucking mechanism fixes the case 11 of the magnetic disk 10. In this state, the hub 12 is attracted to the rotary magnet 3 side by the attraction force of the rotary magnet 3. At this time, the engaging pin 4 is moved by the hub 12 to the rotary magnet 3
It is pushed inside.

Next, when the angle display plate 6 is held by hand and rotated in an appropriate direction, the engaging pin 4 on the rotating magnet 3 side is moved to the hub 12.
Is connected to the drive hole 12b of the angle display plate 6 thereafter.
The hub 12 and the hub 12 rotate integrally with each other while being positioned in the rotational direction. Next, the angle display plate 6 is further rotated so that the angle 0 scale of the angle display plate 6 matches the reference scale 7. As a result, the origin position of the magnetic disk 10 is set to the case 11
Comes to the center of window 13 of.

Next, the angle display plate 6 is rotated so that the angle scale corresponding to the numerical data of the error occurrence angular position matches the reference scale 7. As a result, the actual error occurrence angular position of the magnetic disk 10 comes to the center of the window 13 of the case 11.
In this state, press the eject button 8 to
If you remove 10 from the device body 1, the magnetic disk 10
Since the actual error occurrence angular position is located at the center of the window 13 of the case 11, the error location can be easily observed.

Although the angle display plate 6 is manually rotated in this embodiment, it is also possible to automatically perform the angle adjustment by connecting a step motor or the like to this and performing computer control. is there.

[0016]

As described above, according to the present invention, it is possible to easily perform the actual positioning of the error occurrence angular position on the disk-shaped recording medium such as the magnetic disk, and to achieve the work efficiency. As a result, it is possible to significantly reduce the time required for evaluation.

[Brief description of drawings]

FIG. 1 is a side sectional view of an error occurrence angle positioning device showing an embodiment of the present invention.

FIG. 2 is a front view of the same device.

FIG. 3 is a plan view of the same device.

[Explanation of symbols]

 1 Device main body (case fixing part) 2 Disc insertion part 3 Rotating magnet (rotating part) 4 Engagement pin 5 Mounting shaft 6 Angle display plate 7 Reference scale 8 Eject button 10 Magnetic disk 11 Case 12 Hub 12a Center hole 12b Drive hole 13 Window

Claims (1)

[Claims] 1. An error occurrence angle positioning device for a disk-shaped recording medium for positioning an actual error occurrence angular position on a disk-shaped recording medium for which numerical data of the error occurrence angular position has been obtained by an error measuring machine. Case fixing part for fixing the case of the disk-shaped recording medium, and a rotating part which is positioned and connected in a rotational direction with respect to the hub of the disk-shaped recording medium and is rotatable integrally with the hub,
A disc-shaped angle display plate attached to the rotating part and integrally rotatable and having an angle scale, and a reference scale that coincides with the angle 0 scale of the angle display plate when the disc-shaped recording medium is rotated to the origin position. An error occurrence angle positioning device for a disk-shaped recording medium comprising: