JP3107619B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium which is laminated and driven to rotate, and is provided near the recording medium, and reads / writes data from / to the recording medium at a rotating end. The present invention relates to a disk device including a rotary actuator provided with a head.

In recent years, computer systems have become smaller and more intelligent, as represented by notebook-sized personal computers, and with this trend, there has been a demand for smaller and larger-capacity disk devices as external storage devices. Have been. For this reason, increasing the TPI (track density), BPI (maximum linear recording density), etc. of the recording media is also an effective method, but simply increasing the number of recording media by narrowing the interval between the recording media is effective. Is also an effective means.

[0003]

2. Description of the Related Art FIG. 8 is a plan partial sectional view of a magnetic disk drive as an example of a conventional disk drive, and FIG. 9 is a view in the direction of arrow A in FIG.

In these figures, reference numeral 1 denotes an enclosure having an open top, and reference numeral 2 denotes a lid that covers the top of the enclosure 1. Laminated on the base of the enclosure 1 and rotationally driven (for example, 3
A magnetic disk 3 is provided as a recording medium to be driven at 600 rpm).

[0005] In the vicinity of the magnetic disk 3, an actuator 4 is provided. Next, the actuator 4 will be described. An actuator shaft 5 is provided upright on the base of the enclosure 1. An actuator assembly 6 is rotatably mounted on the actuator shaft 5. At one rotation end of the actuator assembly 6, a head arm 7 extending to the recording surface of the magnetic disk is formed. On the other hand, a coil 8 is attached to the other end of the actuator assembly 6. The coil 8 is connected to a magnetic gap 10 of a magnetic circuit 9 provided on the base of the enclosure 1.
It is arranged in.

A spring arm 11 as a head support mechanism and a gimbal spring 12 are provided at the tip of the head arm 7.
A head 13 for reading / writing data from / to the magnetic disk 3 is provided via the magnetic disk 3.

Next, the operation of the above configuration will be described. When a current is supplied to the magnetic disk device, the magnetic disk 3 is rotationally driven by a drive unit (not shown). When a control unit (not shown) supplies a current to the coil 8, a thrust is generated in the coil 8, and the actuator 4 rotates around the actuator shaft 5, whereby the head arm 7 moves on a desired track of the magnetic disk. Move to. And
The head 13 reads / writes data to / from the magnetic disk 3.
Write.

[0008]

In the case of the conventional magnetic disk drive having the above-mentioned structure, as shown in FIG. 9, the head arm on one side of the head arm 7 is connected to the up-side head via a spring arm 11 and a gimbal spring 12. 13 is provided. On the other surface of the head arm 7, a spring arm 11 ′ and a gimbal spring 1
The head 13 on the up side and the head 13 ′ on the down side provided back to back are provided via a gimbal spring 12 ′ provided back to back with the head 2.

With such a configuration, the spring arms 11, 11 ', the gimbal springs 12, 12' and the head 1
Since the members 3, 13 'are in a back-to-back state, there is a problem that there is a limit in reducing the distance between the surfaces of the magnetic disk 3.

To solve this problem, Japanese Patent Laid-Open Publication No. 3-128
There is one disclosed in Japanese Patent Publication No. 82. FIG.
FIG. 11 is a configuration diagram for explaining a head arrangement of a magnetic disk drive disclosed in Japanese Patent Publication No. -12882, and FIG. 11 is a diagram for explaining a problem in FIG. In these figures, the same parts as those in FIGS. 8 and 9 are denoted by the same reference numerals, and the description thereof will be omitted. In these figures, the difference from FIGS. 8 and 9 is that the heads 13 and 13 ′ are not back-to-back, but are offset.

With such a configuration, the distance between the surfaces of the magnetic disks 3 can be reduced.
As shown in FIG. 1, since the movable range of the head 13 provided at the tip of the head arm 7 is different from the movable range of the head 13 ', another problem that the recording surface (data area) of the magnetic disk 3 becomes narrow occurs.

For example, the usable data zone of the magnetic disk 3 is 20 mm, the width of the heads 13 and 13 ′ is 2 mm,
Assuming that the gap between 3,13 'is 2 mm, the head 13,1'
The pitch of 3 'is 3 mm, and the usable data zone of each head 13, 13' is 20 mm-3 mm = 17 mm. Therefore, the storage capacity per magnetic disk is about (17-20) /
20 = 15% reduction.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the distance between surfaces between recording media .
Accordingly, it is an object of the present invention to provide a disk device capable of increasing the number of mounted recording media and increasing the storage capacity.

[0014]

1 and 2 are diagrams showing the principle of the invention according to claim 1 of the present invention, wherein FIG. 1 is a plan view and FIG. 2 is a side view of FIG. Reference numeral 21 denotes a recording medium which is stacked and rotationally driven, and 22 denotes a recording medium 2
1 is a rotary actuator provided with a head for reading / writing data from / to the recording medium 21 at the rotating end.

On the rotary actuator 22, the recording surface 23a of the first recording medium 23 of the laminated recording media 21 and the recording of the second recording medium 24 adjacent to the first recording medium 23 are recorded. The sky sandwiched between the surface 24a
Between the rotation center of the recording medium 21 and the rotary
A plane including the rotation center of the heater 22 in the plane.
Of the two spaces partitioned on referred, a first arm portion 25 extending into one space, and a second arm portion 26 extending is provided to the other space.

A first head 28 for reading / writing data from / to a recording surface 23a of a first recording medium 23 via a first head support mechanism 27 is provided at the tip of the first arm 25. However, at the tip of the second arm 26,
Read / write data from / to the recording surface 24a of the second recording medium 24 via the head support mechanism 29 of FIG.
Heads 30 are provided.

When the first head 28 is positioned on the innermost track of the recording medium 21, the first arm 25 and the second arm 26
Are formed on the outermost track of the recording medium 21.

Next, according to a second aspect of the present invention, in the first aspect, the first and second head supporting mechanisms 2 are provided.
One of the head support mechanisms 7 and 29 is provided so as to extend from the distal end of the arm toward the proximal end, and the other head support mechanism is provided between the distal end of the arm and the proximal end. Are provided so as to extend in the opposite direction.

[0019]

In the disk device according to the first aspect of the present invention,
When the rotary actuator 22 is driven to rotate, the first
First head 28 provided at the tip of arm 25
Moves to a desired track on the recording surface 23a of the first recording medium 23, and reads / writes data from / to the recording surface of the first recording medium 23.

[0020] Also, the second provided at the distal end of the second head arm 26 provided at the distal end of the second arm portion 26
Head 30 moves to a predetermined track on the recording surface 24a of the second recording medium 24, and the recording surface 2 of the second recording medium 24
4a is read / written from / to data.

The first arm 25 and the second arm 26 are provided on both sides with the center of rotation of the recording medium 21 interposed therebetween.
When the second head 30 is positioned on the first innermost track, the second head 30 is provided so as to be positioned on the outermost track of the recording medium 21.
Data can be read / written to the entire area a, 24a.

According to a second aspect of the present invention, in the disk drive according to the first aspect, either one of the first and second head support mechanisms 27 and 29 is connected to the base end of the head arm from the tip end. Since the first head and the second head are provided so as to extend toward the portion, the same type can be used for the first head and the second head, and stable flying characteristics and electromagnetic conversion characteristics can be achieved.

[0023]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a plan view showing a main part of the first embodiment of the present invention, FIG. 4 is a plan view showing the whole of the embodiment, FIG. 5 is a front view of FIG. 4, and FIG. FIG. 7 is a view for explaining the second embodiment, and FIG. 7 is a view for explaining the effect of the second embodiment.

First, a first embodiment of the present invention will be described with reference to FIGS. First, the disk device of the present embodiment will be described with reference to FIGS. 31 is an enclosure whose upper surface is open. On the base of the enclosure 31, there are provided a plurality of magnetic disks 33 as recording media, which are stacked and arranged and are rotationally driven (for example, 3600 rpm) by a drive unit (not shown).

An actuator 34 is provided near the magnetic disk 33. Next, the actuator 34
Will be described. An actuator shaft 35 is provided upright on the base of the enclosure 31. An actuator assembly 36 is rotatably mounted on the actuator shaft 35. At one rotating end of the actuator assembly 36, an arm A is provided which extends on each recording surface of the magnetic disks 33 arranged in a stacked manner.

Next, the arm A will be described. Arm A
Are the recording surface 37a of the first magnetic disk 37 and the first
Magnetic disk 38 adjacent to the second magnetic disk 37
Space between the recording surface 38a and the magnetic disk
Center of rotation of actuator 33 and rotation of actuator shaft 35
Two symmetrically separated by a plane containing the center in the plane
A first arm portion 39 extending in one of the spaces, into one space, the second arm portion extending to the other in the space 40
It is composed of The distal end of the first arm 39 is connected to the recording surface 37a of the first magnetic disk 37 via a first head support mechanism 41 extending in a direction opposite to the proximal end of the first arm 39. A first head 42 for reading / writing data is provided, and a distal end of the second arm 40 extends in a direction opposite to a proximal end of the second head arm 40. A second head 44 for reading / writing data from / to the recording surface 38a of the second magnetic disk 38 via the second head support mechanism 43 is provided.

On the other hand, a coil 48 is attached to the other end of the actuator assembly 36. The coil 48 is disposed in a magnetic gap 50 of a magnetic circuit 49 provided on a base of the enclosure 31.

Then, as shown in FIG. 3, the first arm section 39 and the second arm section 40 are arranged such that the first head 42 is connected to the innermost track IT of the recording surface 37 a of the first magnetic disk 37. , The second head 44 is formed so as to be located on the outermost track OT on the recording surface 38a of the second magnetic disk 38.

Next, the operation of the above configuration will be described. When a current is supplied to the magnetic disk device, the magnetic disk 33 is rotationally driven by a drive unit (not shown). When a control unit (not shown) supplies a current to the coil 48, the coil 48
Is generated, the actuator 34 rotates about the actuator shaft 35, and the rotation causes the first and second arm portions 39 and 40 to move onto desired tracks on the magnetic disk. Then, the first head 42, the second head
Head 44 reads / writes data from / to the magnetic disk 33.

According to the above configuration, in the arm A, since the first and second heads 42 and 44 are not back-to-back, the surface distance between the first magnetic disk 37 and the second magnetic disk 38 is reduced. It can be narrower than before.

Further, the first arm 39 and the second arm 40 are arranged via the center of rotation of the magnetic disk 33,
Further, when the first head 42 is positioned on the innermost track of the first magnetic disk 37, the second head 4
The first arm 39 and the second arm 40 are positioned so that the fourth arm 4 is positioned on the outermost track of the second magnetic disk 38.
Since the recording surface of each magnetic disk can be used, the storage capacity can be increased.

Next, the second embodiment of the present invention will be described with reference to FIGS.
An example will be described. In these drawings, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The difference between this embodiment and the first embodiment is an actuator assembly 61. Each arm A of the actuator assembly 61 has a first arm 62 and a second arm 63 formed thereon.

A first head 65 is attached to the distal end of the first arm 62 via a first head support mechanism 64 extending in a direction opposite to the base end of the first arm 62. Is provided. Also, at the tip of the second arm 63,
A second head 67 is provided via a second head support mechanism 66 extending toward the base end of the second arm 63. Then, the distance from the actuator shaft 60 to the first head 65 and the actuator shaft 60
The lengths of the second arm 63 and the second head support mechanism are set so that the distance from the second head arm 63 to the second head arm 63 is substantially equal.

By the way, in the first embodiment, FIG.
As shown in FIGS. 7A and 7B, the rotation directions (indicated by arrows) of the magnetic disks 37 and 38 with respect to the first head 42 and the second head 44 are different. Therefore, the first head 4
In the first magnetic head 42, the tapered portion (air inflow end)
In the second magnetic head 44, a taper portion 44a is used.
(UP type) is used at the rear end, and two types of magnetic heads are required.

In particular, in the case of the first magnetic head 42 of the DOWN type, the flying characteristics sometimes show unstable behavior. However, in the present embodiment, the first magnetic head 65 and the second magnetic head 67 are both configured as the UP type magnetic head shown in FIG.
DOO Ri Na, in addition to the effects in the first embodiment, the magnetic head type floating characteristic is good, it can be limited to one type also good electromagnetic characteristics.

[0036]

As described above, according to the first aspect of the present invention, the inter-surface distance between recording media can be reduced, thereby increasing the number of mounted recording media and realizing a large storage capacity.
Ru can be current.

According to the second aspect of the invention, in addition to the effects of the first aspect of the invention, it is possible to use only one type of head having good flying characteristics.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing a main part of the first embodiment of the present invention.

FIG. 4 is a plan view illustrating the entire configuration of the embodiment.

FIG. 5 is a front configuration diagram in FIG.

FIG. 6 is a diagram illustrating a second embodiment of the present invention.

FIG. 7 is a diagram illustrating the effect of the second embodiment.

FIG. 8 is a partial plan sectional view of a magnetic disk device as an example of a conventional disk device.

FIG. 9 is a view as viewed in the direction of arrow A in FIG. 8;

FIG. 10 is a configuration diagram illustrating a head arrangement of a magnetic disk device disclosed in Japanese Patent Application Laid-Open No. Hei 3-12882.

FIG. 11 is a diagram illustrating a problem in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Recording medium 22 Rotary actuator 23 1st recording medium 23a, 24a Recording surface 24 2nd recording medium 25 1st arm part 26 2nd arm part 27 1st head support mechanism 28 1st head 29 2nd Head support mechanism 30 Second head

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 21 / 02,5 / 012,33 / 12

Claims (2)

(57) [Claims] 1. A stacked arrangement, rotation driven printing medium body
When provided in the vicinity of the recording medium body in a disk apparatus comprising a rotary actuator for head for read / write of data for the recording medium body is provided at the rotating end, the rotary the actuator, interposed between the recording surface of the second recording medium body adjacent the first recording surface and the first recording medium of the recording medium of one of the stacked arranged recorded medium body
The rotation center of the recording medium and the rotor
The plane that includes the rotation center of the
Of the two spaces partitioned symmetrically, a first arm portion extending into one space <br/>, and a second arm portion extending to the other in the space provided Te, the Read / write data to / from the recording surface of the first recording medium
First head for writing has previously <br/> end of the first arm portion, provided via the first head supporting Organization, the second
Read / write data to the recording surface of the recording medium
The second head to be performed is provided at the tip of the second arm ,
Provided through the second head supporting Organization, wherein the first arm portion positional relationship between the second arm portion, said first heads is positioned innermost track of the recording medium body It is time, disk apparatus, wherein the second heads is set to be positioned on a track of <br/> outermost of the recording medium body. 2. A support Organization said first and second head
Chino one of the head support mechanism is provided so as to extend toward the proximal end from the distal end of the arm, the other of the head support mechanism, the proximal end than the distal end of the arm toward the opposite direction 2. The disk device according to claim 1, wherein the disk device is provided so as to extend.