JPH0159675B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for writing necessary signals to a predetermined writing position of a disk type recording medium.
In particular, the present invention relates to a device in which a signal can be written in a position that exactly coincides with the predetermined writing position.

[Conventional technology]

A reference disk used to adjust the position of a read/write head in the tracking (radial direction), index (circumferential direction), and azimuth (angular direction relative to the spindle center of the head core) during the manufacture of a floppy disk drive device. Due to its nature, a predetermined signal is required to be written at a position on both disk surfaces that exactly coincides with each predetermined write position. To create such a reference disk, for a 5-inch or 8-inch floppy disk, a read/write head writes a signal on one disk surface of the disk that is attached to the spindle and driven to rotate. After that, the disk is turned over, attached to the spindle and driven to rotate,
As a result, signals were written on the other disk surface using the same head. On the other hand, those with a structure in which a tracking hub is attached to the disk itself are 3.5-inch floppy disks that cannot be installed upside down.
For disks, writing can be done in the same way as 5-inch or 8-inch disks by using a tracking adapter that allows the disk to be installed upside down, or one for each disk surface. Is it possible to write to each disk surface using a separate head without turning the disk over?
Either method was used.

[Problem that the invention seeks to solve]

However, when attaching the disk to the spindle via an adapter, tracking accuracy deteriorates due to adapter processing accuracy and positional repeatability between the adapter and spindle, resulting in a gap between the rotation of the spindle and the rotation of the disk. Eccentricity often occurs. Furthermore, when separate heads are used, work is required to ensure compatibility between the two heads, and in some cases, compatibility cannot be fully guaranteed.
For this reason, with respect to 3.5-inch floppy disks, it is difficult to write signals at positions that exactly match the predetermined writing positions on both disk surfaces, and it is therefore difficult to create a highly reliable reference disk. The problem was that it was difficult.

This invention was made in view of the above points,
An object of the present invention is to provide a drive device for a disk type recording medium that can write a signal at a position that exactly coincides with a predetermined writing position even for a disk having a structure in which a tracking hub is attached to the disk itself.

[Means for solving problems]

The drive device for a disk-type recording medium according to the present invention includes a reversing rotation shaft supported by a fixed frame in a position perpendicular to the rotation axis of the spindle portion, and a reversing rotation shaft having one end attached to the reversing rotation shaft. It includes a spindle support part that rotates together with the rotating shaft and supports a spindle part at the other end, and a reversing drive means for imparting rotational motion to the reversing rotating shaft.

[Effect]

After a read/write head writes a signal onto one disk surface of a disk-type recording medium mounted on the spindle, the reversing drive means is driven to rotate the reversing rotation shaft by 180 degrees. This results in
When the spindle supported by the spindle support rotates around the reversing rotation axis with a disk-type recording medium attached, and the spindle rotates 180 degrees (that is, when the spindle is reversed), the disk-type The recording medium is now turned over in relation to the read/write head, and in this state it is possible to write signals on the other side of the disk by means of the read/write head.

Therefore, a floppy disk with a tracking hub structure can also be used without an adapter or multiple read/write heads (i.e.
Signals can be written on both disk surfaces without causing eccentricity due to deterioration in tracking accuracy (and without requiring work to ensure head compatibility).

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an apparatus employing an embodiment of the disk-type recording medium drive apparatus according to the present invention. This device creates a reference disk for adjusting the read/write head during the manufacture of a floppy disk drive device for a 3.5-inch floppy disk in which the tracking hub is attached to the disk itself.

In this device, a frame 2 is fixedly provided on a base 1, and the frame 2 has both ends facing in the horizontal direction (direction of arrow X in the figure).
A rotation shaft 3 for reversal is supported by protruding from the shaft. One end of a substantially L-shaped spindle support portion 4 is fixedly attached to the rotation shaft 3 for reversal. The spindle support portion 4 rotates together with the rotation shaft 3 for reversal around the rotation shaft 3. A frame 6 of the spindle part 5 is fixedly supported at the tip of the spindle support part 4. The spindle portion 5 rotates around the reversing rotation shaft 3 together with the spindle support portion 4 (and therefore together with the reversing rotation shaft 3). This spindle part 5 is the 3.5-inch floppy disk mentioned above.
A floppy disk 7 consisting of a disk is removably mounted thereon and is driven to rotate. A rotating shaft 8 for rotating the disk 7, a motor 9 for driving the rotating shaft 8, and other parts of the spindle section 5 are attached to a frame 6 and supported by the supporting section 4. The spindle support section 4 supports the spindle section 5 in such a manner that the extension line of the rotation shaft 8 of the spindle section 5 supported at its tip is perpendicular to the extension line of the rotation shaft 3 for reversal. Rotating shaft 3 for reversing from the position shown in Figure 1
When the spindle 5 is rotated 180 degrees, the spindle 5 is inverted to the position shown in FIG. 3 with the disk 7 still mounted thereon. The center of rotation of the rotating shaft 3 and the height of the disk 7 in the spindle portion 5 in FIG. The disk 7 is inverted about the central axis, and although the disk 7 is located in the same space before and after the inversion, only the surface of the disk is inverted.

An example of a driving means for rotating the rotation shaft 3 for reversal is shown in FIG. 2. frame 2
In this case, the rotating shaft is oriented horizontally in the same way as the rotating shaft 3 for reversing, and one end is placed on the same side as the end of the rotating shaft 3 for reversing on which the spindle support part 4 is not attached. A rotary actuator 15 is provided to protrude. Pulleys 16 and 17 are attached to the end of the reversing rotating shaft 3 and the end of the rotary actuator 15, respectively, and the pulleys 16 and 17 are connected by a belt 18. As a result, when the rotary actuator 15 rotates, the pulley 17 and the belt 1
8. The reversing rotating shaft 3 rotates via the pulley 16. In addition, in Fig. 1, the rotary actuator 1
The illustrations of belts 5 to 18 are omitted.

In FIG. 1, a head table 10 supports a read/write head 11 for writing signals to a floppy disk 7 mounted on a spindle 5, and serves to move the head 11 in the horizontal direction. The current position of the head table 10 in the horizontal direction is measured by a length measuring device 12. The head 11 is supplied with a predetermined signal from a signal generator 13 for creating a reference disk.

The microscope 14 is movably supported in the horizontal direction by support means (not shown), and its current position in the horizontal direction is also measured by the length measuring device 12. The microscope 14 is used to verify the horizontal positional relationship between the spindle section 5 and the head 11.

An example of the operation of creating a reference disk using this device is as follows. With the spindle support part 4 in the position shown in FIG. 1 (however, the disk 7 is not yet attached at this time), the microscope 14 is moved horizontally to bring the spindle part 5 and the head 11 into view. According to the measurement result of the length measuring device 12 at that time, the spindle part 5
The position of the head 11 relative to the head 11 is precisely measured to determine the signal writing position. Next, move the floppy disk 7 to the spindle part 5 according to the chucking direction.
Attach it to the disk, rotate it, and press it against one disk surface.
A signal is written to the determined writing position by the head 11. When writing is completed, the microscope 14 is moved and evacuated, the head table 10 is moved and the head 11 is evacuated, and then the rotary actuator 15 is operated to turn the rotation axis 3 for reversal.
By rotating it 180 degrees, the spindle section 5 is inverted with the disk 7 still attached, as shown in FIG. Next, the head table 10 is moved to return the head 11 to its original position while the position is precisely measured by the length measuring device 12, and the head 11 sends a signal to the other disk surface of the disk 7 that has been turned over. Write.

As a result, a signal is written to a position that exactly matches the determined write position on both disk surfaces of the disk 11, and 3.5
It becomes possible to create a highly reliable reference disk even for inch-type floppy disks.

In this embodiment, a 3.5-inch floppy disk having a structure in which the tracking hub is attached to the disk itself is used as an example, but this drive device may of course be applied to other disk-type recording media. .

Further, in this embodiment, the rotation shaft 3 for reversing is rotated by transmitting the rotation of the rotary actuator via a pulley and a belt, but it may be rotated using other appropriate means.

Further, in this embodiment, the disk 7 is turned over in relation to the head 11 by inverting the spindle section 5, but if possible, the disk 7 can be turned over by inverting the head 11 in the same way. 7 may be turned over relative to the head 11.

Further, in this embodiment, the drive device according to the present invention is employed in the device for creating the reference disk, but other appropriate devices (in particular, the drive device for writing signals at a position that exactly coincides with a predetermined writing position) may also be used. This drive device may be used in applications where head compatibility is a problem, etc.).

〔Effect of the invention〕

As described above, according to the drive device for a disk type recording medium according to the present invention, it is possible to write signals on each disk surface using the same read/write head while the disk type recording medium is attached to the spindle section. It is. Therefore, for example, even in the case of a disk type recording medium having a structure in which a tracking hub is attached, signals can be written on each disk surface without deteriorating the tracking accuracy and without requiring work to ensure head compatibility. It becomes possible to write signals on both disk surfaces at positions that closely match each predetermined writing position, and it becomes possible to create a highly reliable reference disk based on this.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of a drive device for a disk-type recording medium according to the present invention, and FIG. 2 is a top view showing an example of a drive means for imparting rotational motion to the reversing rotation shaft in the same embodiment. 3 and 3 are diagrams showing a state in which the spindle portion is reversed in the same embodiment. DESCRIPTION OF SYMBOLS 1... Base, 2... Frame, 3... Rotating shaft for reversing, 4... Spindle support part, 5... Spindle part, 6... Frame, 7... Floppy disk, 8... Rotating shaft, 9...Motor, 10...Head table, 11...Read/write head, 12...
... Length measuring device, 13 ... Signal generator, 14 ... Microscope, 15 ... Rotary actuator, 16, 1
7...Pulley, 18...Belt.

Claims (1)

[Scope of Claims] 1. A spindle portion for removably mounting a disk-type recording medium and rotationally driving the disk-type recording medium, and a fixed frame arranged perpendicularly to the rotation axis of the spindle portion. a rotating shaft for reversing that is supported by a bearing; a spindle support part having one end attached to the rotating shaft for reversing and rotating together with the rotating shaft and supporting the spindle part at the other end; and a reversing drive means for rotating the reversing rotation shaft by the reversing driving means to rotate the spindle support part, and rotate the entire spindle part supported by the other end of the spindle support part. 1. A drive device for a disk type recording medium, characterized in that the disk type recording medium can be reversed together with the disk type recording medium mounted thereon around the reversing rotation shaft. 2. The spindle part is supported by the spindle support part in such a manner that the disk-type recording medium mounted thereon occupies the same spatial position before and after reversal. A drive device for a disk-type recording medium according to item 1. 3. The spindle section is for mounting a floppy disk having a structure in which a adjusting hub is attached to the disk itself, and this driving device is used to adjust the magnetic head when manufacturing a floppy disk drive device. A drive device for a disk-type recording medium according to claim 1 or 2, which is used in a device for writing signals necessary for use as a reference disk on both surfaces of the floppy disk. .