JPH05174480A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To improve the positional stability of a magnetic head and to improve the recording and reproducing characteristic of a magnetic recorder by preventing the resonance of the recording medium of a magnetic head in the circumferential direction and making the magnetic head so as to be flexible to the movement of the recording medium in the radial direction. CONSTITUTION:The bottom part 55 of a knife edge 54 is abutted on the center of the rear of a head attaching plate 57 and the head attaching plate 57 is supported ported on a line of the knife edge 54 by the bottom part 55. A gimbal plate 56 is supported on a continuous line by the sharp edge part of the bottom part 55 of the knife edge 54. Thus, the resonance in the circumferential direction is prevented when a multi-track magnetic head is used. Next, the magnetic head is made so as to correspond flexibly to the movement of the recording medium in the radial direction. The magnetic head is made so as to correspond sufficiently to the delicate positional deviation of the track due to the fluctuation of the disk face due to the rotation of the disk since the track width of a high track density magnetic recording medium is quite narrow especially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is used in a magnetic recording / reproducing apparatus for recording data on a magnetic recording disk medium and reproducing the data recorded on the magnetic recording disk medium. Magnetic head supporting device.

[0002]

2. Description of the Related Art A magnetic recording device such as a floppy disk drive (hereinafter referred to as FDD) is used as a peripheral device of a personal computer. In this FDD, a floppy disk (hereinafter referred to as FD) is rotated in the apparatus, and a small magnetic head is lightly contacted with the FD to write data sent from the personal computer to the FD, Also, the data stored in the FD is read by the magnetic head.

The FD has a disk in which a paint containing magnetic powder for memory is applied thinly and uniformly on the surface of a thin synthetic resin disk, and when it rotates, it becomes partially wavy. Since the magnetic head follows the fluctuation of the disk surface due to the rotation of the disk, it is necessary to have some flexibility in its movement.

In order to achieve this object, a magnetic head is usually placed on a flexible gimbal plate, and the gimbal plate is supported by a pivot type support provided near the center of the gimbal plate. Head support devices are often used.

FIG. 3 is a perspective view showing the conventional gimbal type magnetic head supporting device. In FIG. 3, reference numeral 1 denotes a carriage, which is formed by punching a metal plate or resin molding. The base is provided with two fixing screw holes 2, 2 and the tip is provided with a hole 3 for attaching a magnetic head described later and a gimbal plate for holding the same. A triangular fulcrum holding member 4 projects from one side of the hole 3 toward the inside of the hole 3, and a pivot 5 is provided at the tip thereof.
Is protruding downward. A gimbal plate 6 made of a thin metal plate having elasticity is attached to the lower surface of the hole 3. At the center of the gimbal plate 6, there is a head mounting plate 7 for mounting a magnetic head on the lower surface, most of which is surrounded by a groove 9 in the X direction (circumference of the track of a disk which is a magnetic recording medium). The intermediate support 10 is connected to the intermediate support 10 through a narrow gimbal bridge 8 provided in the direction (orthogonal to the direction), and most of the outer periphery of the intermediate support 10 is surrounded by the groove 12, so that the intermediate support 10 can be moved in the Y direction (magnetic field). It is connected to the outer edge of the gimbal plate 6 by a gimbal bridge 11 provided in the circumferential direction of the track of the disc which is the recording medium. The pivot 5 is in contact with the center of the back surface of the head mounting plate 7, and this supports the head mounting plate 7 at one point. In addition, 13 is a cushioning material which is stretched over the groove 9 between the head mounting plate 7 and the intermediate support portion 10.

FIG. 4 is a perspective view showing another conventional example,
FIG. 5 is a sectional view taken along the line AA of FIG. In FIGS. 4 and 5, reference numeral 21 denotes a carriage, which is formed by punching a metal plate or resin molding. A hole 22 for mounting a magnetic head and a gimbal plate for holding the magnetic head, which will be described later, is provided at the tip. Hole 2
Pivots 23 extend from the sides of 2 that face each other in the X direction. The tip of the pivot 23 is sharp like a needle tip. A gimbal plate 24 made of a thin metal plate having elasticity is attached to the upper surface of the hole 3. The gimbal plate 24 has a head mounting plate 25 at the center thereof, and most of the perimeter thereof is surrounded by a groove 26. It is connected. A magnetic head 29 is mounted on the head mounting plate 25.

[0007]

The conventional gimbal type magnetic head supporting device shown in FIG. 3 suppresses the movement of the magnetic head in the direction perpendicular to the surface of the magnetic recording medium (hereinafter referred to as the Z-axis direction) to perform magnetic recording. In order to make the movement of the disk surface, which is the medium, in the circumferential direction (hereinafter, Y-axis direction) and the radial direction (hereinafter, X-axis direction) flexible, the pivot 5 is supported at one point in the center of the head mounting plate 7. ing. Due to its structure, this type
Although it has good followability to the rotating state of the disk, on the contrary, it easily causes resonance of the magnetic head, which causes a reduction in recording / reproducing efficiency of the magnetic recording device. As a method of preventing the resonance of the magnetic head, for example, a cushioning material 1 as shown in FIG.
There is a method of preventing the resonance by providing No. 3, but the effect cannot be said to be sufficient, and on the contrary, an extra load may be applied to the gimbal plate, which is not preferable in the stability of the magnetic head.

Further, as shown in FIGS. 4 and 5, there is a double pivot type in which the movement of the head mounting plate 25 in the X-axis direction is suppressed and only the movement in the Y-axis direction is made flexible.
This type is intended to further improve the positional stability of the magnetic head 29 due to its structure and to be compatible with a multi-track magnetic head for performing high-density magnetic recording and reproduction. In contrast, on the contrary, it is necessary to suppress the movement (resonance) in the Y-axis direction and make the movement in the X-axis direction flexible. This is because it is necessary to more stably cause the magnetic head to follow the track of high density. Therefore, the conventional double-pivot type is not always effective. Furthermore, the positions of the two pivots are restricted by the size of the sliding surface that contacts the disk that is the recording medium. Specifically, if the inter-pivot distance is longer than the sliding surface dimension, the magnetic head itself sinks, and conversely, if the inter-pivot distance is shorter than the sliding surface dimension, resonance that should be prevented should occur. It will be easier. Therefore, it is necessary to make the dimension of the sliding surface approximately equal to the distance between the pivots, but it is difficult to satisfy this condition in the manufacturing process. Further, when the number of pivots is further increased, it is difficult to make the heights of the pivots uniform.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent resonance of the magnetic head, which is a drawback of the conventional gimbal type magnetic head supporting device, and to improve magnetic recording / reproducing efficiency. It is an object of the present invention to provide a magnetic head support device capable of improving

[0006]

In order to achieve the above object, the present invention provides a magnetic head supporting device for mounting a magnetic head of a magnetic recording / reproducing apparatus on a gimbal plate, a head mounting portion for mounting the magnetic head, and a magnetic head. A gimbal bridge portion which is located in the circumferential direction of a track of a disc which is a recording medium and which connects the head mounting portion to a gimbal plate; a gimbal plate to which the head mounting portion is attached by the gimbal bridge portion; and the gimbal plate. A carriage having an attached hole and located in the hole of the carriage,
A magnetic head supporting device is provided, which has a straight blade in a circumferential direction of a track of the disk, and a cutting edge of the blade is at least a knife edge which is in contact with a back surface of the magnetic head mounting portion.

[0007]

In the magnetic head supporting device for mounting the magnetic head of the magnetic recording / reproducing apparatus on the gimbal plate, the pivot for supporting the head mounting portion is provided in a knife edge shape on a straight line in the circumferential direction of the disk track so that the head mounting portion It suppresses the movement in the circumferential direction and eliminates factors such as magnetic head resonance that deteriorate the magnetic recording / reproducing efficiency.

[0008]

Next, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a magnetic head supporting device according to the present invention.
1 illustrates an example applied to a DD. In FIG. 1, reference numeral 51 denotes a carriage, two screw holes 52, 52 for fixing are provided at the base portion, and a hole 53 for attaching a gimbal plate 56 is provided at the tip. Y in hole 53
A knife edge 54 is provided between the sides facing each other in the axial direction.
Has been passed over. As shown in FIG. 2, the cross section of the knife edge 54 is a triangular shape having a lower portion 55 with an acute angle.
A gimbal plate 56 made of a thin metal plate having elasticity similar to the conventional example is attached to the lower surface of the hole 53. At the center of the gimbal plate 56, there is a head mounting plate 57 for mounting the magnetic head 62 (see FIG. 2) on the lower surface, most of which is surrounded by the groove 58 and which is narrow in the X-axis direction. A second gimbal bridge provided in the Y direction of the intermediate indicating portion 60, which is connected to the intermediate supporting portion 60 via one gimbal bridge portion 59, and the outer periphery of the intermediate supporting portion 60 is largely surrounded by the groove 63. The portion 61 is connected to the outer edge of the gimbal plate 56. As shown in detail in FIG. 2, the lower part 55 of the knife edge 54 is in contact with the center of the back surface of the head mounting plate 57, and this supports the head mounting plate 57 with a line of the knife edge.

As can be seen from FIGS. 1 and 2, in the present invention, the sharp blade portion of the lower portion 55 of the knife edge 54 supports the gimbal plate 56 in a continuous line. As a result, when the multi-track magnetic head is used, it is possible to suppress the movement in the X-axis direction, which is a particular problem.

With respect to the movement in the Y-axis direction, in this embodiment, since the lower portion 55 of the knife edge 54 is in the shape of a blade, it is possible to flexibly deal with the movement in the same manner as the point support. In particular, the track width of the high track density magnetic recording medium is very narrow, and the track position is slightly deviated due to the fluctuation of the disk surface due to the rotation of the disk. In such a case, it is important to be able to flexibly follow the track, and the supporting device by the support of the present invention can sufficiently cope with this.

Further, in the supporting apparatus of this embodiment, since it is supported by the continuous line of the knife edge, as in the case of the conventional two pivot type supporting bodies shown in FIGS. When the distance between the two pivot points is long, there is no problem that the magnetic head sinks. This is particularly effective when the dimension of the sliding surface is longer in the radial direction than in the circumferential direction of the medium as in a multi-track magnetic head. Further, it is not necessary to adjust the height of each pivot as in the prior art, which facilitates manufacturing.

In the above-mentioned embodiment, an example of a single-sided type magnetic head is shown, but the supporting device according to the present invention is not limited to this, and can naturally be applied to a double-sided type magnetic head. is there. Further, not only the FDD but also other magnetic recording / reproducing apparatus can be applied.

[0013]

According to the present invention, recording of a magnetic head which is a problem at the time of recording and reproducing using a magnetic head, particularly a multi-track magnetic head in which the dimension of the sliding surface is longer in the radial direction than in the circumferential direction of the recording medium. By preventing the resonance of the medium in the circumferential direction and making the magnetic head flexible in the radial movement of the recording medium, the positional stability of the magnetic head is improved, and the recording / reproducing of the magnetic recording apparatus is performed. The characteristics can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a gimbal type magnetic head supporting device using a knife edge type supporting body of the present invention.

FIG. 2 is a sectional view taken along the line BB of FIG. 4, showing a pivot portion of an embodiment of a gimbal type magnetic head supporting device using the knife edge type supporting body of the present invention.

FIG. 3 is a perspective view showing a conventional single pivot type gimbal type magnetic head supporting device.

FIG. 4 is a perspective view showing a conventional double pivot type gimbal type magnetic head supporting device.

5 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 51 carriage 52 screw hole 53 punching hole 54 knife edge 55 lower part of knife edge 56 gimbal plate 57 head mounting plate 58 groove 59 first gimbal bridge portion 60 intermediate support portion 61 second gimbal bridge portion 62 magnetic head 63 groove

Claims (2)

[Claims] 1. A magnetic head supporting device for mounting a magnetic head of a magnetic recording / reproducing apparatus on a gimbal plate, the head mounting portion for mounting the magnetic head, and the head being located in a circumferential direction of a track of a disk as a magnetic recording medium. A gimbal bridge portion for connecting the mounting portion to a gimbal plate, a gimbal plate to which the head mounting portion is attached by the gimbal bridge portion, a carriage to which the gimbal plate is attached, and a circle of a track of the disk located on the carriage. A magnetic head supporting device comprising a straight blade in the circumferential direction, and a blade edge of the blade including at least a knife edge that is in contact with the back surface of the magnetic head mounting portion. 2. The gimbal attached to the intermediate indicating portion, the head attaching portion via another gimbal bridge portion and an intermediate supporting portion provided in a direction perpendicular to a circumferential direction of a track of the disk. The magnetic head supporting device according to claim 1, wherein the magnetic head supporting device is attached to the gimbal plate by a bridge portion.