JPS63188878A - Actuator mechanism for magnetic disk device - Google Patents

Abstract

PURPOSE:To effectively prevent the misalignment of a magnetic head due to an environmental change with a simple constitution by forming plural actuator arms integrally and fixing a supporting arm mounted with a magnetic head at its tip. CONSTITUTION:An L shaped head mount base 18 is fixed to the tip side face 13A of the arm 13 of an actuator block 11 freely turnably to a shaft 12 by a reamer bolt 22 and the supporting arm 16 mounted with a magnetic head 15 is fixed to the mounting base 18 by a screw 21. Thus, the number of components is decreased remarkably by a constitution that the mounting base is fixed to the turning face of the arm 13 by the bolt 22 in parallel with the face and by the screw 21 vertically respectively. Moreover, the misalignment of the magnetic head due to the temperature change is prevented effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an actuator mechanism for a magnetic disk drive.

(Prior Art) In recent years, magnetic disk devices have been widely used as external storage devices for personal computers, word processors, and the like. Actuator mechanisms for such magnetic disk drives include the following.

FIG. 4 is for explaining the actuator mechanism of a conventional magnetic disk device. In the figure, 1 indicates a plurality of magnetic heads that respectively write and read data on a plurality of magnetic disks (not shown). These magnetic heads 1 are each attached to the tip of a support arm 2. As shown in FIG. An arm mounting plate 3 is fixed to the other end of the support arm 2, and a screw insertion hole 4 is inserted through the arm mounting plate 3.
．． 4 is formed. Reference numeral 5 designates a plurality of divided actuator arms (one is shown in FIG. 4), and each of the actuator arms 5 has a screw insertion hole 4.4 in the support arm 2 at its tip end. A corresponding screw hole 6.6 is formed. The screw holes 6.6 of each actuator arm 5 are arranged to correspond to the screw insertion holes 4.4 of the support arm 2, and the support arm 2 is fixed to the arm 5 by screws 7.7. Each actuator arm 5 to which these magnetic heads 1 are mounted via a support arm 2 is arranged at a predetermined interval in the same direction via a spacer (not shown) on a rotatable actuator block (not shown). It is integrally fixed with screws.

Then, as the actuator block (not shown) rotates, the actuator arm 5 and the support arm 2 are rotated.
The magnetic head 1 moves (accesses) a magnetic disk (not shown) via the magnetic disk.

However, in the actuator mechanism of the conventional magnetic head device described above, the support arm 2 has a plurality of divided actuator arms 5 each having a magnetic head 1 attached thereto.
These actuator arms 5 are integrally fixed to the actuator block (not shown) by screws, so that they are protected against environmental changes such as temperature changes inside the magnetic disk drive main body and external vibrations and shocks. As a result, thermal expansion, distortion, etc. occur at the fixing point between the actuator block and the actuator arm 5, and the magnetic head 1 of the support arm 2 fixed to the tip of the actuator arm 5 shifts from a predetermined position, causing problems such as off-track. There was a problem with this occurring.

Furthermore, this magnetic head device has a large number of parts and requires high accuracy, which has the disadvantage of increasing costs.

(Problems to be solved by the invention) The present invention is intended to solve the above-mentioned conventional problems.
It is an object of the present invention to provide an actuator mechanism for a magnetic disk device that has a simple configuration, can effectively prevent positional displacement of a magnetic head due to environmental changes, and can reduce costs.

[Structure of the Invention (Means for Solving Problems)] In order to achieve the above object, the present invention provides an actuator block in which a plurality of actuator arms are integrally formed and movable in a predetermined direction; L that is screwed into the screw hole formed on the side of the
The device includes a support arm having a character portion, and a plurality of magnetic heads that are supported by the support arm and read and write data to and from a magnetic disk, respectively.

(Function) According to the present invention, the L-shaped portion of the support arm on which the magnetic head is attached is screwed into the screw hole formed horizontally in the moving direction of a plurality of actuator arms integrally formed on the actuator block. Since the configuration is simple, it is possible to effectively prevent the positional shift of the magnetic head due to environmental changes, and it is also possible to reduce costs.

(Example) Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a perspective view showing an actuator mechanism of a magnetic disk drive according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a portion of FIG. 1, which is enlarged.

In these figures, reference numeral 11 indicates an actuator block rotatably disposed on the shaft 12. A plurality of actuator arms 13 are integrally formed in this actuator block 11 in the same direction. Threaded holes 14 and 14 for reamer bolts are respectively formed in the end side surfaces 13A of these actuator arms 13 in parallel to the rotating surface of the actuator arms 13.

Reference numeral 15 denotes a magnetic head that writes and reads data on a magnetic disk (not shown), and each of these magnetic heads 15 is attached to a support arm 16. Screw insertion holes 17, 17 are formed in each. In addition, 18 is an L-shaped head mount, and these head mounts 1
8 has a screw insertion hole 17 formed in the support arm 16.
17 and a through hole 20.2 for a reamer bolt corresponding to the reamer bolt screw hole 14.14 formed in the actuator arm 13 described above.
0 is formed respectively.

Further, 21 is a fixing screw for fixing the support arm 16 to the head mount 18, and 22 is a reamer bolt for fixing the head mount 18 to the actuator arm 13.

The actuator mechanism of the magnetic disk drive of this embodiment is assembled as follows.

First, connect the screw holes 17.17 of the support arm 16 with the magnetic head 15 attached to the screw holes 19.1 of the head mounting base 18.
Place it in correspondence with 9. Then, the fixing screws 21 and 21 are screwed into one screw hole of the head mount 18 to fix the support arm 16 to the head mount 18, respectively. After this, the through hole 20 for the reamer bolt of the head mounting base 18.
20 corresponding to the reamer bolt screw holes 14.14 of each actuator arm 13, and
2 are screwed into the screw holes 14 of the arms 13 to fix the head mounting bases 18 to the actuator arms 13, respectively.

Therefore, in this embodiment, the actuator block 1
The actuator arms 13 are integrally formed on the actuator arms 1, and threaded holes 14 and 14 for reamer bolts are formed parallel to the rotating surfaces of these actuator arms 13 (on the side surface 13A at the tip end of the actuator arms 13), and these threaded holes are 1
4.14, the L-shaped head mounting base 18 to which the support arm 16 is fixed with the fixing screw 21 is attached to the reamer bolt 22.2.
2, the number of parts is greatly reduced, and it is possible to effectively prevent the position of the magnetic head from shifting due to environmental changes such as temperature changes.The assembly process is also simple, making it easy to assemble. Since accuracy is also stable, costs can be significantly reduced.

In the embodiment described above, a so-called in-line type magnetic disk device in which the magnetic head 15 is disposed in a straight line on the extension of the tip of the actuator arm 13 has been described, but as shown in FIG. It may also be used for an L-shaped type.

FIG. 3 is an enlarged exploded perspective view of main parts showing another embodiment of the present invention, and parts common to FIGS. 1 and 2 are given the same reference numerals and redundant explanations are omitted. .

In this figure, in this embodiment, an L-shaped mounting plate 23 is integrally provided on the support arm 16 on which the magnetic head 15 is mounted, and the mounting plate 23 has screw insertion holes 24.2.
4 is formed. In addition, the actuator arm 13
The side surface 13 of the actuator arm 13 perpendicular to the rotation plane of
In B, screw holes 2 and 25 corresponding to the screw insertion holes 24 and 24 of the mounting plate 23 described above are inserted into the actuator arm 13.
It is formed parallel to the rotating surface of. Then, the screw insertion holes 24, 24 of the mounting plate 23 of the support arm 16 are inserted so that the support arm 16 is approximately perpendicular to the actuator arm 13.
into the screw hole 2 on the side surface 13B of each actuator arm 13.
The support arm 16 is fixed to the actuator arm 13 by arranging it in correspondence with 5.25 and screwing together the fixing screw 26.26.

Therefore, this embodiment can also achieve the same effects as the embodiments shown in FIGS. 1 and 2.

In each of the embodiments described above, a magnetic disk device including a rotary type actuator (actuator block and actuator arm) was described.
The present invention may also be applied to a linear magnetic disk device in which the actuator moves linearly, and similar effects can be obtained.

[Effects of the Invention] As explained above, the actuator mechanism of the magnetic disk device of the present invention can effectively prevent the positional shift of the magnetic head due to environmental changes, and can also reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an actuator mechanism of a magnetic disk drive according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of an enlarged main part of FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is an exploded perspective view showing an enlarged main part of an actuator mechanism of a conventional magnetic disk drive. FIG. 4 is an exploded perspective view showing a main part of an actuator 81 structure of a conventional magnetic disk drive. 11...Actuator block 13...Actuator arm 1
４・・・・・・・・・・・・Screw hole 1 for reamer bolt
5......Magnetic head 16...
......Support arm 17.24...Screw insertion hole 18...L-shaped head mounting base 1
9.25...Screw hole 20...Through hole for reamer bolt 21.26...Fixing screw 22...Reamer bolt 23.・・・
......L-shaped mounting plate applicant
Toshiba Corporation Toshiba Computer Engineering Co., Ltd. Representative Patent Attorney Sasa Suyama - Figure 1

Claims (1)

[Claims] (1) An actuator block in which a plurality of actuator arms are integrally formed and movable in a predetermined direction, and a support arm provided with an L-shaped portion that is screwed into a screw hole formed on a side surface of the actuator arm. 2. An actuator mechanism for a magnetic disk drive, comprising: a plurality of magnetic heads supported by the support arm, each of which writes and reads data to and from a magnetic disk.