JP2526890Y2 - Azimuth adjustment mechanism for floppy disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an azimuth adjustment mechanism provided in a floppy disk drive using a floppy disk as a magnetic recording medium.

2. Description of the Related Art A floppy disk drive device (hereinafter referred to as an FDD device) using a floppy disk as a recording medium is a magnetic head that writes and reads various information by rotating a floppy disk by holding a spindle hub of a spindle motor. Is moved in the radial direction so as to contact the floppy disk.

In such an FDD device, so-called azimuth adjustment is performed in which the magnetic head is adjusted to contact each track of the floppy disk at an appropriate angle.

There are various methods for adjusting this azimuth adjustment,
One means will be described with reference to the mechanism diagram of the FDD device shown in FIG.

In FIG. 9, reference numeral 10 denotes a spindle motor for rotating the floppy disk 11 at high speed. 12 is a magnetic head
The carriage 13 includes a carriage 13 which is guided by guides 14 and 15 and moves in the illustrated X-axis direction. Reference numeral 16 denotes a lead screw that is driven to rotate by a stepping motor 17, and a feed claw 18 fixed to the carriage 12 meshes with the lead screw. That is, the feed claw 18 is sent out by the rotation of the lead screw 16, and the carriage 12 moves in the illustrated X-axis direction.
The magnetic head 13 moves in the radial direction while contacting the floppy disk 11.

The above-mentioned FDD device adjusts the azimuth by moving and adjusting the spindle motor 10 with respect to a mounting frame (not shown) in the Y-axis direction shown in the figure.

That is, if the spindle motor 10 is moved in the Y-axis direction in the drawing, the center of rotation of the floppy disk 11 is displaced, so that the tracks on the floppy disk 11 can be positioned so that the contact angle of the magnetic head 13 is optimized. .

The azimuth adjusting means uses a floppy disk as a reference, moves and adjusts the spindle motor 10 while referring to a reproduction signal read from the disk, and fixes the position of the motor 10 after the adjustment.

As another means of adjusting the azimuth, there is a method of optically adjusting the magnetic head 13 before fixing the magnetic head 13 to the carriage 12. This adjusting means optically adjusts the head gap on the illustrated X axis with reference to the rotation center of the spindle motor 10, and after this adjustment, moves the magnetic head 13 to the carriage.
Fix to 12.

[Problem to be solved by the invention] The means for adjusting the azimuth by moving and adjusting the spindle motor 10 may cause the floppy disk 11 to be displaced in the device case, so that the disk 11 may come into contact with the case or other parts. In addition, there is a problem that the rotation cycle of the disk 11 cannot be detected by the pulse generating coil.

Means for optically adjusting azimuth before the magnetic head 13 is fixed to the carriage 12 requires a high-precision and expensive jig for adjustment, and furthermore, it takes time to set the magnetic head 13. In addition, there is a problem that the azimuth may be shifted due to shrinkage of the adhesive for fixing the magnetic head 13 or the like.

An object of the present invention is to solve the above-mentioned problem of azimuth adjustment.

[Means for Solving the Problems] In order to achieve the above object, according to the present invention, a carriage for moving a magnetic head in a radial direction of a floppy disk as a magnetic recording medium is provided on parallel first and second guides. Therefore, in the floppy disk drive device configured to be moved and driven, one side of the carriage is slidably mounted on the first guide, and the other side is slidably and pivotably mounted on the second guide. And an adjusting mechanism for finely moving the azimuth with respect to the second guide with one end of the first guide as a fulcrum using the other end as a fulcrum. A short column-shaped adjustment pin provided with an adjustment operation part in a part thereof, a rod-shaped screw member which is axially inserted in the column center direction at an eccentric position of the adjustment pin, and attaches the adjustment pin to the device fixing portion, A spring member for fixing one end side to the device fixing portion and pressing one end of the first guide to the adjustment pin at the other end side, and adjusting the azimuth by operating the adjustment operation portion described above; An azimuth adjustment mechanism for a floppy disk drive device, wherein the adjustment pin is fixed by the screw member, is proposed.

[Operation] Of the parallel first and second guides, one end of the first guide is moved and adjusted by the adjustment mechanism.

That is, the adjusting pin is rotated by operating the adjusting operation unit with the screw member loosened.

Thus, the first guide slightly turns around the other end as a fulcrum. Due to this fine adjustment, one end of the first guide slightly moves in a direction approaching or moving away from the second guide.

Therefore, the carriage slightly turns, and the azimuth adjustment is performed by changing the contact angle of the magnetic head with the track of the floppy disk. After such adjustment, the screw is tightened to fix the adjustment pin to the device fixing portion.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a mechanism diagram of an FDD device provided with an azimuth adjusting mechanism of the present invention. In this drawing, the FD shown in FIG. 9 is used.
The same members as those of the D device are denoted by the same reference numerals.

As shown, the first and second guides 14 and 15 for guiding the carriage 12 are elongated rods having a circular cross section, and an azimuth adjusting mechanism 20 described later is attached to one end of the first guide 14.
Is provided.

As shown in the enlarged view of FIG. 2, the other end of the first guide 14 has a fixing pin 22 fixed to a base (device fixing portion) 21 and another end attached to the fixing pin 22. It is supported by a leaf spring 23 fixed to the base 21 so as to be pressed against the base 21. The base 21 is formed with a convex portion 21a, and the guide 14 is lifted from the base surface.

Both ends of the second guide 15 are the same as the supporting structure shown in FIG.
The other end is supported by a fixing pin 26 and a leaf spring 27, respectively.

The carriage 12 is provided with metal bearings 28 and 29 on one side thereof and the first guide 14 is slidably inserted therethrough. The other side of the carriage 12 is a second guide as shown in an enlarged view in FIG. 15 is slidably engaged. That is, the carriage
The second guide 15 is sandwiched between a thin portion 12a formed on the other side of the 12 and a leaf spring 30 fixed to the carriage 12.

On the other hand, as shown in FIGS. 4 to 6, a azimuth adjusting mechanism 20 provided at one end of the first guide 14 has a short column-shaped adjusting pin 32 attached to the base 21 by a rod-shaped screw 31, and this adjusting pin 32. A leaf spring 33 is fixed to the base 21 by pressing the first guide 14 against the base 32.

The adjusting pin 32 has an oval body cross section, a screw 31 is axially inserted at an eccentric position, and an adjusting operation portion 32a is integrally protruded from the outer peripheral surface. In addition, as shown in FIG. 5, a convex portion 21b for lifting the first guide 14 from the base surface is provided.

Further, the distal end of the leaf spring 33 is bifurcated and inserted into the neck of the adjustment pin 32. However, the configuration is not necessarily required, and the distal end may be cut.

When adjusting the azimuth in this embodiment, first, the screw 31 is loosened so that the adjustment pin 32 can be rotated. In this state, the adjustment operation section 32a is pushed and turned using a jig, and the adjustment pin 32 is turned around the screw 31 as a support shaft. (See FIG. 8) The adjustment pin 32 slightly moves the one end of the first guide 14 in the vertical direction in FIG. 1 according to the rotational position.

Therefore, the first guide 14 is fixed to the fixing pin 22 at the other end.
Is slightly pivoted about the position of, and the carriage 12 is slightly pivoted in conjunction with the pivot. For example, when the adjustment pin 32 is rotated to slightly move the one end of the first guide 14 upward (FIG. 1), the carriage 12 slightly turns counterclockwise (FIG. 1).

The carriage 12 has a feed claw 18 as shown in FIG.
Therefore, the interlock with the lead screw 16 is not affected by the minute turning. In this way, the carriage 12
Is slightly swiveled to slightly change the contact angle of the magnetic head 13 with the floppy disk 11 to adjust the azimuth.

After the adjustment, the adjustment pin 32 is fixed by tightening the screw 31.

In the azimuth adjustment of this embodiment, the spindle motor 10 is fixed, and the magnetic head 13 is fixed to the carriage 12 in advance.

Although the embodiment of the present invention has been described above, the azimuth adjusting mechanism 20 may be provided on the other end side of the first guide 14, that is, on the fixed pin 22 side. Pin 32 has a circular cross section, and a screw is
It is also possible to adopt a configuration in which the axis 31 is inserted.

"Effects of the Invention" As described above, the azimuth adjusting mechanism according to the present invention has a configuration in which one of the first and second guides for guiding the carriage can be adjusted by slightly moving one end of the first guide. Therefore, the azimuth can be adjusted without moving the spindle motor or using a high-precision and expensive jig as in the related art.

Also, the azimuth adjustment mechanism of the present invention is provided with an adjustment pin and a screw member for attaching the adjustment pin to the device fixing part, loosening the screw to adjust the rotation of the adjustment pin, and providing an adjustment operation part on the adjustment pin. As a result, the adjustment pin can be finely rotated, so that the azimuth adjustment mechanism can easily perform highly accurate azimuth adjustment with a simple mechanism.

[Brief description of the drawings]

FIG. 1 is a mechanical diagram of an FDD device having an azimuth adjusting mechanism of the present invention, FIG. 2 is an enlarged partial view showing a support portion of a guide for guiding a carriage, and FIG. 3 is engagement of the carriage with a second guide. FIG. 4 is an enlarged perspective view showing the azimuth adjusting mechanism, FIG. 5 is an enlarged sectional view showing the adjusting mechanism, FIG. 6 is an enlarged plan view of the adjusting mechanism, and FIG. FIG. 8 is an enlarged simplified view showing the interlocking relationship between the feed claw provided on the carriage and the lead screw, FIG. 8 is a plan view similar to FIG. 6, and FIG.
The figure shows FDD for explaining the conventional means of azimuth adjustment mechanism
It is a mechanism diagram of an apparatus. 10 Spindle motor 11 Floppy disk 12 Carriage 13 Magnetic head 14 First guide 15 Second guide 20 Azimuth adjustment mechanism 31 Screw 32 Adjustment pin 32a … Adjustment operation part 33 …… Leaf spring

Claims (1)

(57) [Scope of request for utility model registration] A carriage for moving a magnetic head in a radial direction of a floppy disk serving as a magnetic recording medium is driven and moved in accordance with first and second parallel guides. The side portion is slidably mounted on the first guide, the other side portion is engaged with the second guide so as to be slidable and pivotable, and one end of the first guide is connected to the other. An adjustment mechanism for finely moving the azimuth with respect to the second guide with the one end as a fulcrum is provided, and the adjustment mechanism includes a short column-shaped adjustment pin provided with an adjustment operation part on a part of a circular outer peripheral surface; The adjustment pin is axially inserted in the column direction at the eccentric position, a rod-shaped screw member for attaching the adjustment pin to the device fixing portion, one end side is fixed to the device fixing portion, and one end of the first guide is fixed at the other end side. A floppy disk comprising: a spring member that presses an end of the adjusting pin to the adjusting pin; and adjusting the azimuth by operating the adjusting operation unit, and then fixing the adjusting pin by the screw member. Azimuth adjustment mechanism for drive unit.