JPS63206980A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To decrease the distance between disk media and to attain a compact size of a magnetic disk device by securing such a state where the parts except ing those areas having contacts with the disk media of each head are included in the same space when the head is put into a gap formed between adjacent disk media respectively. CONSTITUTION:A flexure 4B containing an upward head 3B is attached at the lower face side of an arm 5 together with a flexure 4A containing a downward head 3A attached at the upper face side of the arm 5 respectively with a distance secured between both flexures so as to avoid a mutual contact between both heads 3A and 3B. When both heads 3A and 3B are set between the disk media 2A and 2B, it seems as if the recording/reproducing surfaces were provided on both upper and lower face sides of a single head as long as those heads 3A and 3B are viewed horizontally from the vertical direction against the access directions of both heads 3A and 3B. Thus the distance is minimum between adjacent disk media and therefore a compact magnetic disk device is obtained.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a magnetic disk device, and particularly relates to the structure of mounting a head of a magnetic disk device that stores a plurality of disk media in a stacked manner. .

(Prior Art) The capacity of each magnetic disk device is increased by stacking a plurality of disk media. In order to read the signals recorded on the disk media, the head is inserted into the gap between the stacked disk media.

FIGS. 4 and 5 are diagrams showing the structure of such a conventional magnetic disk device. In Fig. 4.

Place the flexure (14) between the disk media (12A) and (12B) so that the upward head (13B) and the downward head (13A) are back to back.
B) is fixed to the arm (15) via (14A). If this magnetic disk device is arranged in a 4-way direction in FIG. 4, the distance between the media (12A) and (12B) must be widened. For this reason, increasing the number of disk media to increase capacity inevitably increases the size of the magnetic disk device itself.

In order to eliminate such disadvantages, there are prior art structures for attaching heads for the purpose of narrowing the spacing between disk media, as shown in FIGS. 6, 7, and 8. (Japanese Unexamined Patent Publication No. 5fl-119581) FIG. 6 is a partial perspective view of a conventional magnetic disk device.
A downward facing head (23A) is placed on the same plane as the arm (25).
) and flexures (24A) and (24B) each having an upwardly facing head (23B) attached thereto are arranged side by side to narrow the distance between the disk media (22A) and (22[1). - As a result, the distance between adjacent disk media (22A) and (22B) can be narrowed to more than twice the height of the highest head, as shown in FIG.

This can be seen in Figure 8, which is a diagram when viewed from direction C in Figure 7.
It is clear from the figure.

(Problems to be Solved by the Invention) In the above-mentioned conventional magnetic disk device, the distance between adjacent magnetic disk media is limited to a little more than twice the height of the head, and it is still difficult to obtain a compact magnetic disk device. could not.

An object of the present invention is to provide a compact magnetic disk device by making the interval between stacked disk media narrower than before and as close as possible to the height of one head.

[Structure of the invention]

(Means for Solving the Problems) The magnetic disk device of the present invention includes a first head that performs recording/reproduction on a first disk medium surface on two adjacent disk media; a second head that performs recording/reproduction on a second disk medium surface adjacent to the disk medium surface; a first flexure to which the first head is attached; and a second flexure to which the second head is attached. and an arm to which both the first flexure and the second flexure are fixed,
the second flexure on the side opposite to the first disk medium surface on the arm; the first flexure on the opposite side; The head and the second head are arranged so as not to overlap each other.

(Function) In the magnetic disk device configured as described above, when the actuator is operated and the arm is moved and the head is inserted into the gap between adjacent disk media.

Since the portions of each head other than the portions that contact the disk medium exist in the same space, it is no longer necessary for the distance between adjacent disk media to be twice the height of the head.

At this time, by making the distance between the two flexure arm fixing parts smaller than the head height by a minute value (α), the distance between adjacent disk media will be the head height + α, and by reducing α, In other words, as the distance between the two flexure arm fixing parts approaches the height of the head, the distance between the disk media approaches one time the height of the head, and becomes the minimum value.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1, 2, and 3.

FIG. 1 is a perspective view of a magnetic disk device according to an embodiment. A plurality of disk media including adjacent disk media (2A) and (2B) are mounted on a spindle (2) and driven to rotate in the disk rotation direction. This disk medium (2B
) is a first downward facing head (3A) that performs recording/reproduction on the upper surface of the disk medium (2A), and is attached by a flexure (4A). The upward facing head (3B) is attached by a flexure (4B).

Then, the flexure (4B) with the upward-facing head (3B) attached is attached to the bottom side of the arm ■.
Attach the flexure (4A) with A) attached to the top side of the arm (■) by shifting the heads (3A) and (313) so that they do not touch each other. In this case, the downward facing head (3A) and the upward facing head (3B) may be attached to either the left or right side, but in this embodiment, the downward facing head (3A) is attached to the left side of the arm ■, and the upward facing head (3B) is attached to the left side of the arm The head of (
3B) was attached to the right side of arm ■. The flexures (4A) and (4B) used are both 3370 type SASUMS■
is moved in the access direction by an actuator (3) consisting of a drive coil (C) and a magnetic circuit (0).

Disk media (2A), (2B) and actuator ■
etc. are housed in a housing (10) and hermetically sealed. Since such a magnetic disk drive is extremely sensitive to dust, an air filter is used to remove dust inside the drive by utilizing the airflow generated by the rotation of the disk medium.

FIG. 2 is a partial side view of the embodiment shown in FIG. 1.

Flexure (4A) and (4B) each have arm 0.
Since they are attached to the top and bottom surfaces, the distance between the two flexures (4A) and (/IB) at the arm fixing part is equal to the thickness of the arm ■ + Ia (1.38m).
When the head (3A), (3B) supported by such flexures (4^), (4B) is inserted between the disk media (2A), (2B), the head (3A) in FIG. ).

When viewed horizontally from a direction perpendicular to the access direction in (3B), it appears as if a recording/reproducing surface is attached to the upper and lower surfaces of one head.

FIG. 3 is a partial side view of the embodiment shown in FIG. 1, viewed from the direction a in FIG. 2. FIG.

Head (3A), (38) height)lh is 2.54+
nm, and the thickness of arm ■ shown in FIG. 2 is 41 (a (1
, 38 ■) is 1.16 square meters smaller than this, and is attached to a flexure (4
Head (3A), (3B) via A), (4B)
When fixed, the adjacent disk media (2A), (2B
) spacing 4) Volume 1b is the head (3A).

It is narrowed to 3.7ni, which is 1.16m+ taller than the height of one piece (3B), 1lh (2,54+igm).

In addition, the 3370 type suspension used in this example is
The arm fixed part is 10.2+w+ and the length is 32.2m.
A head with a width of 6.0 mm is attached to an isosceles triangular flexure, but if two such suspensions are installed side by side on the same plane of the arm as in the prior art, two heads The gap distance is at least 10.2 m, which is the width of the arm fixing portion of the flexure. When the gap between the two heads increases in this way, not only does the azimuth angle of each individual head increase, but the amount of change in the azimuth angle between the inner and outer peripheries of the disk medium surface also increases, making it difficult to perform good recording and reproduction. It becomes possible. On the other hand, in this example, the flexure (4A), (4B)
The two heads (3A) and (3
11) until the flexure (4) does not overlap.
^).

Since the arm fixing parts of (4B) are arranged 6.0cm overlapping, the gap distance Gh between the heads (3A) and (38) is 5.0m, which is 6.2cm compared to the conventional technology.
This means that it has become narrower. This enables better recording and reproduction than before.

In this embodiment, the actuator (2) is a linear actuator, but the same effects as in the embodiment can be obtained even when a rotary actuator is used.

Also, the upper surface of the arm ■ holds the flexures (4A) and (4B) against the disk media that are stacked up and down.

Although it was attached to the bottom, it does not necessarily have to be configured that way; the arm is machined with a step, and the upper part has a flexure with a downward facing head attached, and the lower part has a flexure with an upward facing head attached. You may.

Furthermore, if the disk medium is installed horizontally, the correspondence relationship can also be left and right.

Furthermore, the form of the flexure is not limited to the 3370 type suspension, and may be rod-shaped, and the head does not need to be mounted at the tip of the flexure.

It can also be attached to the side of the flexure.

〔Effect of the invention〕

As described above, according to the present invention, since the distance between adjacent disk media is minimized, a compact magnetic disk device can be provided.

Further, even when increasing the capacity by increasing the number of disk media, it is possible to suppress the increase in size of the device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a magnetic disk device according to an embodiment of the present invention, FIG. 2 is a partial side view of the embodiment shown in FIG. 1, and FIG.
The figure is a partial side view of the embodiment shown in FIG. 1 viewed from the direction a in FIG. 2, FIG. 4 is a partial side view of a conventional magnetic disk device, and FIG. 6 is a partial side view of the magnetic disk drive seen from the direction b in FIG. 4;
The figure is a perspective view of another conventional magnetic disk device, and FIG. 7 is a partial side view of another conventional magnetic disk device shown in FIG.
FIG. 8 is a partial side view of another conventional magnetic disk device shown in FIG. 6, viewed from the direction C in FIG. 1.11.21...Spindle 2A, 2B, 12A, 12B, 22A, 22
B...Disk media 3A, 13A, 23A...
Downward 7\Tsudo (first head) 38, 138.23B・
...Upward needle stud (second head) 4A, 413.1
4A, 14B, 24^, 24B... Flexure 5, 15.25... Arm 6... Air filter 7... Actuator 8... Drive coil 9
... Magnetic circuit 10 ... Housing agent Patent attorney Nori Ken Yudo Chika Kikuo Takehana Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a magnetic disk device in which a plurality of disk media are mounted on a spindle and driven to rotate, and a head is moved on the disk medium surface, a first disk medium surface on two adjacent disk media. a first head that performs recording and reproduction on a second disk medium surface adjacent to the first disk medium surface; a second head that performs recording and reproduction on a second disk medium surface adjacent to the first disk medium surface; a first flexure attached thereto; a second flexure attached with the second head; and an arm to which both the first flexure and the second flexure are fixed; The second flexure is on the side facing the first disk medium surface, the first flexure is on the opposite side, and the first head and the first flexure are seen through from a direction perpendicular to the disk medium surface. A magnetic disk device characterized in that two heads are arranged so that they do not overlap.