JPH03147580A - Disk device actuator - Google Patents

Abstract

PURPOSE:To form the actuator low in power consumption and calorific value by providing a head arm opposed to a disk on the actuator, and attaching two heads to the head arm so that the floating surfaces are opposed to each other. CONSTITUTION:A disk 37 rotates at high speed by a spindle motor 33. When a control circuit allows a current to flow to a voice coil motor 34, a shaft 41 oscillates, a head 43 moves to a target track of the disk 37, and the head 43 executes read/write of data. A head arm 42 is provided so as to be opposed to the disk 37, and two heads 43 are attached to the head arm 42 so that the floating surfaces are opposed to each other, therefore, both faces of the disk of the uppermost stage and the disk of the lowest stage can be utilized. Accordingly, in order to attain the same storage capacity, it can do without a great number of pieces of the disk and pieces of the hear arm. In such a way, the power consumption and the calorific value of a disk rotating system and an actuator driving system are also decreased.

Description

[Detailed Description of the Invention] [Summary] Regarding the actuator of a disk device that moves a head that reads/writes data to a disk to a target track of the disk, a disk device with low power consumption and low heat generation is possible. The actuator is provided with a head arm facing the disk, and the two heads are attached to the head arm so that their air bearing surfaces face each other.

[Industrial Application Field] The present invention relates to an actuator for a disk device that moves a head that reads/writes data from/to a disk to a target track on the disk.

In recent years, disk devices are required to have low power consumption and low heat generation. Therefore, it is necessary to reduce the number of mounted disks and save power in the disk rotation system.

[Prior Art] Next, a conventional example will be explained using the drawings. FIG. 4 is a block diagram of a conventional disk device.

In the figure, 1 is a housing that seals the disk device, and 2 is a spindle motor attached to the housing 1. Reference numeral 3 denotes a spindle, which is attached to a rotor (not shown) of the spindle motor 2. On spindle 3,
A spindle hub 4 is fixed, and five disks 5 are stacked on the spindle hub 4 in this conventional example.

The spindle 3 is rotatably attached to the /X housing 1 via bearings 6.7 attached to both ends of the spindle 3 and bushings 8.9 holding the bearings 6.7. These disks 5 are driven by the spindle drive motor 2 at a constant speed (for example, 3800
rpIm).

Next, the actuator will be explained. 10 is disk 5
This head is provided for each disk surface and reads/writes data to each disk 5. These heads 10 connect to the disk 5 via gimbal springs 11.
It is attached to a head arm 12 extending between the two. The head arms 12 are stacked and integrated with a spacer 13 in between. A shaft 14 is attached to the head arm 12 integrated in this way. This shaft 14 has bearings 15 attached to both ends.
．． 16 and bearing 15. Bushing 1 holding 16
It is swingably attached to the housing 1 via 7.18. A voice coil motor 19 is connected to the lower end of the shaft 14 and drives the actuator to swing.

Next, the operation of the above configuration will be explained. When a control circuit (not shown) applies current to the voice coil motor 19, the integrated head arm 12 swings (rotates) around the shaft 14.
do. By swinging the integrated head arm 12, each head 10 accesses a target track on each disk 5.

[Problems to be Solved by the Invention] In the conventional example with the above configuration, the head arm 12 is arranged so as to extend between each disk 5, so that the disk in the middle can be used on both sides. There is a problem in that only one side of each of the top and bottom disks is used.

In order to achieve a certain storage capacity, the number of disks mounted increases, and the number of head arms also increases, which increases the power consumption and heat generation of the disk rotation system and actuator drive system. There is a problem.

The present invention has been made in view of the above problems, and an object thereof is to provide an actuator for a disk device that enables a disk device with low power consumption and low heat generation.

[Means for Solving the Problems] FIG. 1 is a diagram showing the principle of the present invention. In the figure, 21 is a head that reads/writes data to/from the disk 22. As shown in FIG. An actuator 23 moves the head 22 to a desired track on the disk 22.

24 is an actuator 2 facing the disk 22;
This is the head arm provided at 3.

The heads 21 are provided on each head arm 24 so that their air bearing surfaces face each other.

[Function] In the actuator of the disk device shown in FIG.
The head 21 is moved to the disk 22 by the actuator 23.
move to the desired track.

The head 21 then reads/writes data to/from the disk 22 .

[Example] Next, an example of the present invention will be described using the drawings. Second
The third figure is a plan configuration diagram illustrating one embodiment of the present invention.
FIG. 3 is a sectional configuration diagram taken along the line ■--■ in FIG. 2.

In these figures, 31 is a base, and 32 is an enclosure that seals the device together with the base.

The base 31 is provided with a spindle motor 33 and a voice coil motor 34.

Here, the disk rotation system will be explained.

A spindle housing 36 is attached to a spindle 35 that is the output shaft of the spindle motor 33. A gap portion 36a is formed at the bottom of the spindle housing 36.

A disk 37 is stacked on the flange 36a with a spacer 38 interposed therebetween. A clamper 39 presses the uppermost disk 37 to fix the stacked disks 37. Further, 40 is a bearing that rotatably supports the spindle 35.

Next, actuator A will be explained.

A head arm 42 facing each disk 37 is formed on a shaft 41 that is an output shaft (swing shaft) of the voice coil motor 34 . Two heads 43 are attached to the tip of the head arm 42 via a gimbal 44 so that their air bearing surfaces face each other. Also,
45 is a bearing that rotatably supports the shaft 42.

Next, the operation of the above configuration will be explained. The disk 37 is rotated by a spindle motor 33 at 3800 rpm in this embodiment.
It is rotating at m. Then, a control circuit (not shown) supplies current to the voice coil motor 34, causing the shaft 41 to swing and the head 43 to move to a desired track on the disk 37. Then, the head 43 is connected to the disk 37.
Read/write data.

According to the above configuration, the head arm 42 is provided to face the disk 37, and the two heads 43 are attached to the head arm 42 so that their air bearing surfaces face each other. Also available on both sides.

Compared to conventional technology, fewer disks and fewer head arms are required to achieve the same storage capacity.

Therefore, the amount of heat generated per power consumption of the disk rotation system and the actuator drive system is also reduced.

[Effects of the Invention] As explained above, according to the present invention, the actuator is provided with a head arm facing the disk, and two heads are attached to the head arm so that the air bearing surfaces face each other. With this configuration, it is possible to realize an actuator for a disk device that enables a disk device with low power consumption and low heat generation.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of the present invention. Fig. 2 is a plan configuration diagram illustrating an embodiment of the present invention. Fig. 3 is a sectional configuration diagram taken along the line ■-■ in Fig. 2. A cross-sectional configuration diagram, FIG. 4, is a configuration diagram of a conventional disk device. In FIGS. 1 to 3, 21.43 is a head, 22.37 is a disk, 23, A is an actuator, and 24.42 is a helad arm.

Claims (1)

[Claims] An actuator (23) of a disk device that moves a head (21) that reads/writes data to/from a disk (22) to a target track of the disk (22).
), the actuator (23) is provided with a head arm (24) facing the disk (22), and the two heads (21) are attached to the head arm (24) so that their air bearing surfaces face each other. An actuator for a disk device characterized by: