JPH0482008A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To easily adjust an azimuth by turning an eccentric cam and moving a guide bar to adjust the relative position of a magnetic head to a magnetic disk. CONSTITUTION:Eccentric cams 24 and 26 are held in prescribed positions on a base plate 2, and a prescribed torque is applied with a jig to turn these cams around the centers of attaching holes 24A and 26A. Holding bar spring 28 and 30 are fixed to attaching bases 20 and 22 by screws 32 and 34 to press a guide bar 4 to the flanks of eccentric cams 24 and 26. Consequently, one of eccentric cams 24 and 26 is turned to incline the guide bar 4 by an angle theta corresponding the extent of turning. Thus, the relative position of a magnetic head 6 to a magnetic disk 8 is finely adjusted to easily perform the azimuth adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a magnetic disk device, and can be applied to, for example, an electronic still camera.

B. Summary of the Invention According to the present invention, in a magnetic disk device, the azimuth of the magnetic head can be easily adjusted by finely adjusting the position of the radial direction rod of the magnetic disk using a guide rod.

C. Prior Art Conventionally, in magnetic disk devices such as electronic still cameras, by rotating or parallelly moving the magnetic head,
Adjust the relative position of the magnetic head to the magnetic disk,
This allows the azimuth angle to be adjusted.

D Problems to be Solved by the Invention However, in this method, when the magnetic head is rotated or translated in parallel, adjustments other than the azimuth angle (for example, the mounting angle of the magnetic head, etc.) inevitably change. .

Therefore, it is necessary to repeat the adjustment work again, and there is a problem that the adjustment work becomes complicated accordingly.

One possible method for solving this problem is to adjust the azimuth angle by adjusting the magnetic disk side.

That is, by adjusting the mounting position of the spindle motor, the position of the magnetic disk is moved and the azimuth angle is adjusted.

However, in this method, when the spindle motor is moved, the state of contact between the magnetic disk and the magnetic head may change, and this method is still insufficient in practical use.

The present invention has been made in consideration of the above points, and aims to propose a magnetic disk device in which the azimuth angle can be easily adjusted.

E Means for Solving the Problems In order to solve the problems, the present invention provides a magnetic disk device 1 that sequentially records predetermined recording signals on the magnetic disk 8 by moving the magnetic head 6 in the radial direction of the magnetic disk 8. , a guide rod 4 that guides the magnetic head 6 in the radial direction of the magnetic disk 8, and an eccentric cam 2 that is held on the substrate 2 so that the guide rod 4 is in contact with the side surface and can be rotated.
4.26 and a spring-like member 28.30 that presses the guide rod 4 against the side surface of the eccentric cam 24.26.
．． 26 to move the position of the guide rod 4 and adjust the relative position of the magnetic head 6 with respect to the magnetic disk 8.

By pressing and supporting the F-action guide rod 4 against the side surface of the eccentric cam 24.26, the position of the guide rod 4 can be moved by rotating the eccentric cam 24.26, and the magnetic head 6 relative to the magnetic disk 8 can be moved. The azimuth angle can be easily adjusted by adjusting the relative position of.

G example An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 designates an electronic still camera, in which a cylindrical guide rod 4 disposed on a substrate 2 is used to guide a magnetic head 6 in the radial direction of a magnetic disk 8. As shown in FIG.

That is, the spindle motor 9 supports the magnetic disk 8 with its rotating shaft 9A, and is disposed at a predetermined position on the substrate 2.

As a result, the magnetic disk 8 is driven by the spindle motor 9 to rotate at a predetermined speed.

On the other hand, the guide rod 4 passes through the through hole 10A of the linear arm 10 and is held at a predetermined position on the board 2, thereby reciprocating the linear arm 10 in the direction indicated by arrow a with respect to the board 2. Support freely.

The linear arm 10 has an overall L-shape, and has a threaded hole 10B formed in parallel with the through hole 10A, into which the screw 12 is screwed.

As a result, the linear arm 10 is connected to the stepping motor 1.
By rotationally driving the screw 12 with 4, the arrow a
It is designed to be able to reciprocate by a predetermined distance in the direction shown by.

Furthermore, the linear arm 10 mounts the magnetic head 6 at a predetermined position via the head stand 16, thereby supporting the magnetic head 6 so as to face the magnetic disk 8 at a minute distance from the magnetic disk 8. .

Furthermore, by reciprocating a predetermined distance in the direction shown by arrow a in this state, the magnetic head 6 is moved by a predetermined distance in the radial direction of the magnetic disk 8.

Furthermore, the guide rod 4 is supported at a predetermined position on the base 20.22, with plate-shaped mountings at both ends, via eccentric cams 24.26 and presser springs 28.30, respectively. 22 is fixed at a predetermined position on the substrate 2.

As a result, in the electronic still camera 1, the guide rod 4 is held at a predetermined position on the substrate 2, and the guide rod 4
By adjusting the position of the magnetic head 6, the azimuth angle of the magnetic head 6 can be finely adjusted.

That is, as shown in FIG. 2, the eccentric cams 24, 26 are
Part of the side surface is formed into an arc shape, and the mounting holes 24A and 26A are used for mounting, and the mounting half is shown on the base 20.22.

As a result, the eccentric cams 24 and 26 are held in a predetermined position on the base plate 2, and by applying a predetermined torque using a jig, for example, the mounting can be performed by rotating the eccentric cams 24 and 26 about the central axes of the holes 24A and 26A. It is designed to be movable.

On the other hand, the presser springs 28, 30 each have a screw 32.
．． 34, the mounting is fixed to the stand 20.22, and the eccentric cam 2
The guide rod 4 is pressed against the side surface of 4.26.

Therefore, as shown in FIG. 3, when one of the eccentric cams 24 or 26 is rotated, the guide rod 4 can be tilted by an angle θ corresponding to the amount of rotation.

Thereby, the relative position of the magnetic head 6 with respect to the magnetic disk 8 can be finely adjusted, and the azimuth can be easily adjusted.

Furthermore, by rotating the eccentric cams 24 and 26 by the same angle, the guide rod 4 can be moved in parallel by that amount, and the locus of movement of the magnetic head 6 relative to the magnetic disk 8 can be changed.

Therefore, not only the azimuth angle but also the mounting position of the magnetic head 6 to the magnetic disk 8 can be easily finely adjusted.

Furthermore, at this time, the side surface of the eccentric cam 24, 26 is formed in an arc shape, so that the guide rod 4
The magnetic head 6 is held in contact with the magnetic disk 8 at one point, thereby effectively avoiding deformation of the guide rod 4, and making it possible to finely adjust the position of the magnetic head 6 on the magnetic disk 8.

Furthermore, since the azimuth can be adjusted using only the eccentric cams 24 and 26, the position adjustment work for mounting the spindle motor 9 on the substrate 2 can be omitted.

Therefore, if necessary, for example, by forming the coil of the spindle motor 9 on the substrate 2, the spindle motor 9 can be formed integrally with the substrate 2, thereby making the electronic still camera 1 as a whole thinner and smaller. can do.

According to the above configuration, the guide rod 4 that guides the magnetic head 6 in the radial direction of the magnetic disk 80 is connected to the eccentric cam 24.
6 and supported by presser springs 28.30, the eccentric cam 24.26 can be rotated to easily finely adjust the relative position of the magnetic head 6 with respect to the magnetic disk 8, and the azimuth angle can be adjusted accordingly. can be fine-tuned.

In the above-described embodiment, a case was described in which an eccentric cam whose side surface was partially arcuate was used, but the present invention is not limited to this, and for example, an eccentric cam having a cylindrical shape as shown in FIG. 4 may be used. You can.

Further, in the above-described embodiment, a case was described in which both ends of the guide rod 4 were supported by eccentric cams, but the present invention is not limited to this, and the azimuth angle may be adjusted by supporting only one end.

Further, in the above-described embodiment, the present invention was applied to an electronic still camera, but the present invention is not limited to this, and can be widely applied to various magnetic disk devices such as floppy disk devices.

H Effects of the Invention As described above, according to the present invention, the azimuth angle can be easily adjusted by finely adjusting the position of the guide rod that guides the magnetic head in the radial direction of the magnetic disk using an eccentric cam. A magnetic disk device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an electronic still camera according to an embodiment of the present invention, FIG. 2 is a side view showing the support portion of the guide rod, and FIG. 3 is a linear plan view for explaining azimuth angle adjustment. FIG. 4 is a perspective view showing another embodiment. 1...Electronic still camera, 2...Board, 4...Guide rod, 6...Magnetic head, 8...Magnetic disk 8 24.26----・
Eccentric cam, 28.30...presser spring.

Claims (1)

[Claims] Moving a magnetic head in the radial direction of a magnetic disk,
A magnetic disk device for sequentially recording predetermined recording signals on the magnetic disk, comprising: a guide rod that guides the magnetic head in a radial direction of the magnetic disk; and a substrate that abuts a side surface of the guide rod so as to be rotatable. and a spring-like member that presses the guide rod against a side surface of the eccentric cam, the eccentric cam is rotated to move the position of the guide rod, and the magnetic disk is rotated to A magnetic disk device characterized in that the relative position of heads is adjusted.