JPS637579A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To smoothly insert a magnetic head by disposing the magnetic head on the upper surface side of respective disks oppositely to the magnetic head on the lower surface side, and arranging the magnetic heads of the adjacent disks at different positions. CONSTITUTION:The magnetic heads 14 at the upper and the lower surfaces of the respective disks 11 are oppositely disposed. An upward pressing force F1 and a downward pressing force F2 applying on the disk 11 are mutually offset, so that at the time of an inoperativeness, a moment force for bending the disk 11 is not produced but the bending deformation of the disk 11 can be prevented. During the operation, there is no problem such as the rotation of the disk 11 in a swelling state and the collision of data error and the disk 11 of the magnetic head 14 can be prevented. Since the positions of the magnetic heads 14 of the adjacent disks 11 are different, the space between the respective disks 11 may be maintained to a dimension slightly larger than the height dimension of the magnetic head 14. Thereby, the bending deformation of the disk can be prevented and at the time of a loading, the inserting operation of the magnetic head can be smoothly carried out.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic disk device, and more specifically, a plurality of disk disks are stacked at predetermined intervals, and a pair of magnetic heads are installed on the upper and lower surfaces of each disk disk. The present invention relates to a magnetic disk device in which each of the following is arranged.

[Conventional technology]

In recent years, this type of magnetic disk device has become smaller and smaller.
There is a growing demand for larger capacity, and for this reason, the storage capacity per volume has been increased to make the device itself more compact, and the space between each disk has been narrowed to increase the number of disks mounted. Although attempts are made to increase the capacity, in this case the arrangement of the magnetic head with respect to each disk becomes a problem.

The conventional magnetic disk device is disclosed in Japanese Patent Application Laid-Open No. 59-119511.
As described in No. 1, by arranging the magnetic head on the upper surface side of each disk disk and the magnetic head on the lower surface side at different positions, the interval between each disk disk disk is narrowed and the number of mounted disks is increased. There is. To explain this in detail with reference to FIG. 5, numeral 1 indicates disk disks stacked at predetermined intervals, numeral 2 indicates magnetic heads disposed on the upper and lower surfaces of each disk disk 1, and each disk The magnetic head 2 on the upper surface side and the magnetic head 2 on the lower surface side of the disk are arranged at different positions. 3A is a loading pin that loads each magnetic head 2 placed on the upper surface side of each disk disk 1 to the disk disk 1 (grounds the magnetic head 2 to the disk disk 1) during assembly, and 3B is a loading pin for each disk disk 1. A loading pin for loading a magnetic head 2 placed on the lower surface of the plate onto the disk disk 1 is shown.

However, in the above configuration, the magnetic head 2 on the upper surface side and the magnetic head 2 on the lower surface side of each disk disk 1 are arranged at different positions.

It is sufficient to keep the distance between the disks 1 to be slightly larger than the height of the magnetic head 2. In other words, the distance between the disks 1 can be narrowed and the number of disks mounted can be increased. However, the magnetic head 2 on the upper surface side of each disk disk 1
No consideration was given to deformation (bending) of the disk disk 1 due to the magnetic head 2 on the lower surface side being disposed at different positions.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the magnetic head 2 on the upper surface side and the magnetic head 2 on the lower f side of each disk disk 1 are arranged at different positions. An upward pressing force F1 and a downward pressing force F2 are applied to different positions of the disk disk 1 by the head 2,
When a long period of time passes, the moment force of the pressing forces F1 and F2 causes the disk disk 1 to bend and deform, causing the problem that the disk disk 1 rotates in an undulating state during operation. In particular, when a floating magnetic head is used as a magnetic head, its flying height is extremely small at 0.3 μm, so if waviness occurs in the disk disk 1, it becomes difficult to maintain a constant flying spacing, resulting in data errors. In the worst case, the magnetic head may collide with the surface of the disk, leading to damage.

In addition, the loading work during assembly is performed by lifting the load arm of each magnetic head 2 in advance using the loading pins 3A and 3B, and then moving the loading pin forward to insert the magnetic head 2 between the disk discs 1. , the loading pins 3A, 3B are each gently retreated to load each magnetic head 2 onto the disk disk 1;
Since the spring force of the load arm acts in the same direction (in the direction of the arrow shown in the figure), it is difficult to load the magnetic head 2 onto the disk disk 1 while maintaining the force opposing the large force, making it difficult to insert the magnetic head 2 smoothly. I have a problem where I can't do it.

An object of the present invention is to provide a magnetic disk that can reduce the distance between each disk disk, prevent bending and deformation of the disk disk that causes waviness, and allow smooth insertion of a magnetic head during loading work. The goal is to provide equipment.

[Means for solving problems]

The above object is achieved by arranging a magnetic head on the upper surface side of each disk disk and a magnetic head on the lower surface side facing each other.

This is achieved by arranging the magnetic heads of adjacent disks at different positions.

[Effect]

The magnetic heads on the upper and lower surfaces of each disk are arranged to face each other, and the downward and upward pressing forces act on the same area and cancel each other out, allowing the disk to bend during non-operation. No moment force is generated, and bending deformation of the disc is prevented. Also, since the positions of the magnetic heads on adjacent disks are different, it is only necessary to maintain the spacing between each disk to be slightly larger than the height of the magnetic head. can. Also, during loading, the loading pin holds a magnetic head that generates a downward pressing force and a magnetic head that generates an upward pressing force, so the force acting on the loading pin becomes almost zero, and the magnetic The head insertion operation can be performed stably and smoothly.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a cross-sectional view showing the arrangement of magnetic heads in a magnetic disk device according to the present invention, FIG. 2 is an overall plan view of the magnetic disk device, and FIG. 3 is a perspective view of FIG. 2 viewed from the ■-■ direction. The six embodiments shown show the case where four disks 11, which are recording media, are mounted. Each disk disk 11 is stacked at a predetermined interval, and the hub 1
2 to the output shaft 13 of a spindle motor (not shown)
installed on. A magnetic head 14 for recording and reproducing information is provided on the upper and lower surfaces of each disk 11. As shown in FIG. The magnetic head 14 on the upper surface side and the magnetic head 14 on the lower surface side of each disk disk 11 are arranged to face each other, and the magnetic heads 14 of the mutually adjacent disk disks 11, 11 are arranged at different positions. . In this embodiment, the magnetic head 14 of the even-numbered disk disk 11 and the magnetic head 14 of the odd-numbered disk disk 11 are
are placed in different positions. Each magnetic head 14 has a load arm 1 made of a flexible spring member.
The load arm 15 is attached to the tip of the helad arm 16. The head arm 16 is stacked and fixed on top of the linear bearing 17. A thin steel belt 18 is fixed to the movable portion of the linear bearing 17, and a capstan 20 for winding the steel belt 18 α is attached to the output shaft of the torque motor 19. Then, due to the rotational movement of the output shaft of the torque motor 19, the linear bearing 1
7 moves linearly via a capstan 20 and a steel belt 18. Further, the disk disk 11, magnetic head 14, linear bearing 17, etc., excluding the torque motor 19, are housed in a sealed container 21.

Next, the operation of this embodiment will be explained.

The magnetic heads 14 on the upper and lower surfaces of each disk disk 11 are arranged facing each other, and as shown in FIG.
upward pressing force F1 and downward pressing force F2 acting on
Since these cancel each other out, there is no moment force that bends the disk 11 during non-operation, and the moment force that bends the disk 11 is eliminated.
This prevents bending deformation.

This eliminates the problem of the disk disk 11 rotating in an undulating state during operation, and prevents data errors and collisions of the disk disk 11 with the magnetic head 14. Furthermore, since the positions of the magnetic heads 14 of adjacent disk disks 11 are different, it is only necessary to maintain the interval between each disk disk 11 at a dimension slightly larger than the height dimension of the magnetic head 14. Each interval can be narrowed. Furthermore, during the loading operation, as shown in FIG. 4, each loading pin 3A, 3B holds a magnetic head 14 that generates an upward pressing force Fl and a magnetic head 14 that generates a downward pressing force F2. Therefore, the force acting on the loading pins 3A and 3B becomes almost zero, and the insertion operation of the magnetic head can be performed stably and smoothly.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to narrow the distance between each disk disk, prevent bending and deformation of the disk disk that causes waviness, and smoothly insert the magnetic head during loading operation. It can be carried out.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a sectional view showing the arrangement of magnetic heads in a magnetic disk device according to the present invention, FIG. 2 is an overall plan view of the magnetic disk device, Figure 3 is a perspective view of Figure 2 viewed from ■-■ direction, Figure 4
The figure is a sectional view for explaining the insertion of a magnetic head in a loading operation, and FIG. 5 is a sectional view for explaining the arrangement of a conventional magnetic head and the insertion of a magnetic head in a loading operation. 3A, 3B...Loading pin, 11...Disk disc, 14...Magnetic head, 15...Load arm, 16...Head arm. Representative patent attorney Tadashi Akimoto Jitsu bu Figure bupu --- Chair 7 Yen tree bu 4...- Ishikatsuki, go 1. Figure 2 Figure 5

Claims (1)

[Claims] 1. A plurality of discs are stacked at predetermined intervals,
In a magnetic disk device in which a pair of magnetic heads are arranged on the upper and lower surfaces of each disk disk, the magnetic head on the upper surface side and the magnetic head on the lower surface side of each disk disk are arranged to face each other, A magnetic disk device characterized in that magnetic heads of adjacent disk disks are arranged at different positions. 2. The magnetic disk device according to claim 1, wherein the magnetic heads of the even-numbered disk disks and the magnetic heads of the odd-numbered disk disks are arranged at different positions.