JPS6313268B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic head support device in a magnetic disk storage device that performs magnetic recording on both sides of a flexible magnetic disk.

[Background of the invention]

FIGS. 1 and 2 show the structure of a magnetic head support device in a conventional magnetic disk storage device. 1st
The figure is a perspective view, and FIG. 2 is a side view. A carriage 1 is the main body of a magnetic head support device, and a swing arm 2 and a swing arm 3 each having a magnetic head as a magnetic transducer are fixed to the carriage 1 with bolts and nuts 10. Further, this magnetic head support device is attached to the main body of the magnetic disk through a guide hole 13 provided in the carriage 1. The radial movement of the disc of the magnetic head is effected via a steel belt 14 attached to the carriage 1 with bolts and nuts 15;
The steel belt 14 is driven by a step motor or the like mounted on the main body of the apparatus.

This magnetic head support device will be explained in more detail with reference to FIG. A groove 12 is formed in the carriage 1, and a flexible magnetic disk 9 (hereinafter simply referred to as a magnetic disk) as a recording medium is inserted into the groove 12. Magnetic heads 4 and 5 are arranged on both sides of the magnetic disk 9, and these magnetic heads 4 and 5 are supported by load-applying springs 6 and 7, respectively, to apply a load to the disk surface and adjust the circumference of the disk. It is given a degree of freedom of movement in the direction and radial direction, and is designed to stably follow fluctuations in the magnetic disk. However, in such a configuration, if disk fluctuations are large,
Movement in the direction perpendicular to the surface of the disk is likely to occur;
In severe cases, it had the disadvantage of vertical vibration.

In order to solve this problem, a configuration as shown in FIG. 3 was devised. That is, the magnetic head 5 on the lower side of FIG. 3 is fixed to the carriage 1 using an adhesive 8 or the like, and the magnetic head 5 is allowed to move in the direction perpendicular to the surface of the disk, the circumferential direction of the disk, and the radial direction. This is a configuration that does not allow this. According to this method,
Since the magnetic disk 9 is pressed against the magnetic head 5 by the load applied to the upper magnetic head 4, fluctuations in the disk can be minimized by the load applied to the magnetic head 4, and the above-mentioned The followability problem is solved.

However, even with this method, as shown in FIG. 4, when the magnetic disk 9 is not recording or reproducing data, it is not possible to maintain a sufficient distance between the magnetic disk 9 and the fixed magnetic head 5, and the disk rotates. The magnetic head 5 comes in contact with the magnetic head 5 or continuously slides thereon, damaging the magnetic disk 9 or shortening the disk's lifespan.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head support device that has excellent followability to a magnetic disk and minimizes wear on the magnetic disk.

[Summary of the invention]

The feature of the present invention is that one end is supported by the carriage so as to be rotatable in the direction of distance and distance with respect to the disk surface, and the other end is brought into contact with the guide part of the carriage due to the elastic force of the spring, so that it can rotate against the disk surface. The first magnetic head is fixed to a first arm that has a fixed position in the vertical direction, and is attached to the disk surface via a support mechanism that has a degree of freedom of movement in the radial direction and circumferential direction of the disk and has a load force. On the other hand, a second magnetic head is attached to a second arm whose one end is supported by a carriage so as to be rotatable in the direction of distance and distance, and the first and second arms are arranged so that when one arm is moved, the other arm is reversed. By engaging to form a coupling mechanism that moves in the direction, stable contact between the magnetic head and the magnetic disk is maintained during recording and reproduction, and damage and wear to the magnetic head and the magnetic disk are minimized. be able to.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to FIGS. 5 and 6.

The ends of swing arms 2 and 3 are made of spring material, and the carriage 1 is
is fixed with bolts and nuts 10. The swing arms 2 and 3 are therefore pivotable in the direction of distance and distance relative to the plane of the disk. One end of a load adding spring 6 is fixed to the upper swing arm 2, and the magnetic head 4 is supported at the other end of the load adding spring 6. The load adding spring 6 has the function of generating a load force to press the magnetic head 4 against the surface of the magnetic disk 9, and
It functions as a gimbal that gives the magnetic head 4 a degree of freedom of movement in the circumferential direction and radial direction of the disk.

On the other hand, the lower swing arm 3 is biased toward the disk 9 by the elastic force of the spring material, and is in contact with the guide portion 19 of the carriage 1. In this state, the swing arm 3 is fixed in a direction perpendicular to the surface of the disk 9. A magnetic head 5 is fixed to this swing arm 3 via a fixing fitting 11. Therefore, the lower magnetic head 5 has no degree of freedom of movement, and furthermore, its movement in the direction perpendicular to the surface of the disk is restricted.

Further, a portion protruding from the upper swing arm 2 and a portion protruding from the lower swing arm 3 engage with each other to form a cam portion 16, and a load adding portion 17 provided on the upper swing arm 2 is engaged with each other to form a cam portion 16. By lifting the lower swing arm 3 with a mechanism not shown, the lower swing arm 3 is lifted up with the upper swing arm 2.
It is starting to move in the opposite direction. Further, such a magnetic head support device is moved in the radial direction of the disk by a drive mechanism similar to that shown in FIG.

Next, these operations will be explained.

FIG. 5 shows the state when no recording or playback is being performed, and FIG. 6 shows the state during recording or playback.

When not recording or reproducing (for example, when inserting a magnetic disk or moving the magnetic head in the radial direction of the disk), a load-off signal is output from the control section of the magnetic disk device, and a mechanism (not shown) causes the upper swing arm 2 to The swing arm 2 is lifted upward via the load applying portion 17 of the swing arm 2 . At the same time, the lower swing arm 3 also rotates in a direction away from the surface of the disk by the action of the cam portion 16. This state is shown by the broken line in FIG.

During recording and playback, a load-on signal is output from the control unit of the magnetic disk device, and the mechanism that lifts the load adding section 17 of the upper swing arm 2 is released, and the upper swing arm 2 is moved by the spring. 5 in the direction of arrow 18 in FIG. As a result, the magnetic head 4 is moved to the magnetic disk 9.
come into contact with. At the same time, the lower swing arm 3 also rotates in the direction of the disk surface via the cam portion 16, and the magnetic head 5 comes into contact with the magnetic disk 9. In this state, the degree of freedom of movement of the lower magnetic head 5 in the direction perpendicular to the surface of the disk and in the circumferential and radial directions of the disk is restricted.

With the above-described configuration, according to this embodiment, the magnetic disk is pressed against the lower magnetic head by the upper magnetic head during recording and reproduction, so that fluctuations in the disk are suppressed by the load applied to the upper magnetic head. It can be miniaturized and close contact between the magnetic head and the magnetic disk can be maintained. Since the magnetic disk is not brought into contact with the magnetic head except during recording and reproduction, damage and wear on the magnetic disk can be minimized. Furthermore, wear on the magnetic head can also be reduced.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to maintain stable contact between the magnetic head and the magnetic disk during recording and reproduction, and to minimize damage and wear to the magnetic head and the magnetic disk.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the structure of a conventional magnetic head support device, with FIG. 1 being a perspective view and FIG. 2 being a side view. 3 and 4 are a side view and a side view, respectively, of another example of a conventional magnetic head support device.
6 and 6 are side views, respectively, of a magnetic head support device according to an embodiment of the present invention. 1... Carriage, 2, 3... Swing arm, 4, 5... Magnetic head, 6... Load adding spring, 16... Cam portion.

Claims (1)

[Claims] 1. A support device for a double-sided recording magnetic head in which the magnetic heads are brought into contact with both sides of a flexible magnetic disk, which includes a carriage movable in the radial direction of the flexible magnetic disk, and a spring rotatably connected to the carriage. a first arm having one end supported by the carrier and having a fixed position in a direction perpendicular to the surface of the flexible magnetic disk at a position where the other end abuts the arm receiving portion of the carriage; a first magnetic head fixed to the other end; a second arm facing the first arm and rotatably supported at one end via a spring; a second magnetic head mounted via a gimbaled support mechanism that has degrees of freedom of movement in the radial and circumferential directions of the flexible magnetic disk and has a loading force in the direction of the flexible magnetic disk; the first arm so that when one of the arms is rotated in a direction away from the surface of the flexible magnetic disk, the other arm is rotated in a direction opposite to the rotation direction of the one arm; A magnetic head support mechanism characterized in that a protrusion of an arm and a protrusion of a second arm are engaged to form an interconnection mechanism.