JP2575822B2 - Rotating disk type storage device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating disk storage device, and more particularly to a hermetic rotating disk having an air circulation channel structure suitable for cooling the inside of the device and removing dust. It relates to a type storage device.

[Conventional technology]

In a conventional rotating disk type storage device such as a magnetic disk device, when a rotating disk installation portion is separated from a drive mechanism installation portion inside the device, for example, as described in JP-A-61-292265, a rotating disk installation portion is used. A first opening through which the transducer support means penetrates, a second opening which is an air outlet from the rotating disk installation section to the driving mechanism installation section, and a rotating disk installation from the driving mechanism are provided in the partition wall separating the drive mechanism installation section. And a third opening for returning the airflow to the portion. Further, for example, as described in JP-A-58-200480, the first opening may also serve as the second opening.

[Problems to be solved by the invention]

In the above-mentioned conventional technique, the first opening or the one that also serves as the second opening is provided at the center where the outer periphery of the disk and the separating wall are parallel to each other because the transducer supporting means needs to be penetrated. For this reason, the airflow flowing out of this portion becomes a flow parallel to the isolation wall, and the IC mounted on the transducer support means or the driving mechanism cannot be sufficiently cooled.

On the other hand, if the second opening is provided considerably upstream of the first opening, the outflow angle becomes nearly perpendicular to the isolation wall. However, in this method, the dynamic pressure of the outflow gas is reduced, and thus the outflow angle is mounted on the transducer or the driving mechanism. In order to cool the IC, not only a sufficient flow rate could not be obtained, but also it was difficult to adjust the outflow angle.

Therefore, if the opening area on the upstream side is increased, the magnetic shielding effect from the drive mechanism installation part side is reduced, and the airflow including dust from the transducer support means side is caused by the imbalance in the pressure distribution at this opening. There is a problem that the liquid flows directly back from the opening to the portion where the rotating disk is installed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotating disk storage device provided with a means capable of sufficiently cooling an IC mounted on a transducer driving mechanism.

[Means for solving the problem]

In order to achieve the above object, the present invention provides at least one disk mounted on a rotating shaft, a transducer movably supported in opposition to the disk, and driving means for supporting the transducer and moving the same in a predetermined direction. In the rotating disk type storage device having the above, a barrier is provided between the disk and the IC mounted on the transducer supporting means, and the intersection of the tangent to the disk from the existence range of the IC mounted on the transducer supporting means and the barrier The present invention proposes a rotating disk type storage device in which an opening including a hole is formed on a barrier and a part of the air flow generated by the rotation of the disk is forcibly guided to the IC and cooled.

The present invention also provides a barrier between the disk and the IC mounted on the transducer support means, and blocks an opening including the intersection of the tangent to the disk and the barrier from the existence range of the IC mounted on the transducer support means. The present invention proposes a rotating disk type storage device which is formed on the upper side and provided with airflow guide means near the upper side behind the opening to forcibly guide a part of the airflow generated by the rotation of the disk to the IC and cool it. .

The opening or the airflow guiding means may also provide the airflow with a flow velocity distribution such that the airflow velocity from the opening becomes maximum in the IC direction requiring cooling.

The present invention further proposes a rotating disk type storage device having an airflow guiding duct for forcibly guiding a part of the airflow generated by the disk rotation to an IC mounted on the transducer supporting means and cooling the IC.

The outlet of the airflow guide duct may be branched into an IC mounted on the transducer supporting means and a heating element of the driving means.

A plurality of airflow inlets of the airflow guide duct may be provided corresponding to each disk.

The present invention generally proposes a rotating disk type storage device provided with a means for separating a part of an air current generated by the rotation of the disk from the disk and leading the IC to an IC mounted on the transducer supporting means.

[Action]

In the present invention, a barrier is provided between the disc and the IC mounted on the transducer support means, and an opening including the intersection of the tangent to the disc and the barrier from the existence range of the IC mounted on the transducer support means is formed on the barrier. Thus, the air flow generated by the high-speed rotation of the disk can be efficiently guided to the IC mounted on the transducer supporting means, and a sufficient cooling effect can be obtained.

At this time, if the airflow guide means is provided in the vicinity of the upper rear side of the opening, it is possible to prevent still air from being entrained from the upper rear side, and the dynamic pressure of the airflow from the disk is not attenuated. Mounted on the means
It will be possible to provide accurate guidance to IC.

By devising the shape of this opening or airflow guide means, to focus the airflow mainly on the area that needs the most cooling,
It is possible to change the flow velocity distribution.

In addition, if the airflow guide duct is used, the airflow can be mainly directed to a portion requiring cooling.

When the airflow guide duct is branched into the IC mounted on the transducer supporting means and the heating element of the transducer driving means, the IC as the signal processor and the voice coil which is the main heating element of the mechanical driving means are both more. It can be cooled efficiently.

Further, when there are a plurality of disks, a sufficient air flow rate can be obtained by providing a plurality of airflow intake ports of the airflow guide duct.

From a different point of view, the present invention can be said to have a means for separating a part of the air current generated by the rotation of the disk from the disk and guiding the IC to an IC mounted on the support means supporting the transducer. A sufficient cooling effect can be obtained.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.
In the following embodiments, the disk is a magnetic disk, but it goes without saying that the present invention can also be applied to an optical disk recording device or the like. In the hermetically sealed magnetic disk device described here, a plurality of magnetic disks are mounted in a standing state on a horizontal axis, and a transducer moves in a radial direction on a magnetic disk surface. The heating element is mainly a signal processor (IC) of the transducer mounted on the transducer driving means and a voice coil of a voice coil motor of a driving mechanism.

FIG. 1 is a side sectional view showing a basic embodiment of a sealed magnetic disk drive according to the present invention. In the figure, a rotating shaft 1
The magnetic disk 2, which is a plurality of disks attached to the
It rotates in the direction of the arrow shown on the disk. The transducer 3 is mounted on a slider 4 and further connected to a mounting means 6 by a support means 5. The mounting means 6 is guided by a guide means 9 comprising a ball bearing 7 and a guide rail 8, and regulates the moving direction of the transducer 3 in the radial direction of the magnetic disk 2. The mounting means 6 is moved in a radial direction of the magnetic disk 2 by a driving means 12 including a voice coil 10 and a magnet 11. The sealing means 13 surrounds them all. The rotating disk installation section 14 on which the magnetic disk 2 is installed and the drive mechanism installation section 15 on which the guide means 9 and the drive means are installed are separated by a barrier 16.
In the sealing means 13, the disk installation part 14 and the drive mechanism installation part 15 are formed separately. The disk installation part 14 and the drive mechanism installation part 15
Flange 14 for joining together by bolts, for example
a and 15a, respectively. The member 42 between these flanges is a seal member for giving the joint a seal. In addition, a filter 18 is provided to remove dust in the closed space. The first opening 30 is provided for moving and positioning the transducer 3 to a desired position on the magnetic disk 2 by the driving means 12, and is opened to the installation area of the filter 18.

The feature of the present embodiment is that an opening (second opening) including the intersection of the barrier 16 and the tangent to the magnetic disk 2 from the range of the signal processing IC (read / write IC) 34 of the transducer on the support means 5 is provided. ) 31 is provided.

When the second opening 31 is provided, the airflow generated due to the high-speed rotation of the magnetic disk 2 does not go in the direction c, but the strong airflow a that goes to the read / write IC 34 at the optimum angle in the portion b.
Becomes This strong air flow a forcibly cools the read / write IC 34 as a heating element mounted on the transducer drive mechanism, and also sufficiently cools the voice coil 10 of the drive means 12. As a result, thermal runaway of electrical components such as the read / write IC 34 is prevented and the conventional voice coil
The positioning error of the transducer (magnetic head) due to thermal expansion and the voice coil 10
No damage to itself.

FIG. 2 is a side sectional view of an embodiment provided with airflow guiding means. This embodiment is different from the embodiment shown in FIG.
The airflow guide means 33 is provided on the rear upper side.

FIG. 3 is a perspective view showing an example of the airflow guiding means 33. In the present example, the barrier 16 is extended to the lower end of the filter 18 installation portion, and a third opening 20 for blowing out the airflow from the filter 18 to the rotating disk installation portion 14 is provided.

The effects of the airflow guiding means 33 are as follows. 2nd opening
In the case where 31 is close to the first opening 30 or the pressure loss of the flow path formed on the drive mechanism installation portion 15 side is large, the second opening
The outflow airflow from 31 does not blow out in the direction of the read / write IC 34 but is drawn to the first opening 30 side.

Therefore, when the airflow guide means 33 is installed behind and above the second opening 31, it is possible to prevent still air from being entrained from the rear upper side, and the dynamic pressure of the airflow from the magnetic disk 2 is not attenuated. It is possible to guide to.

Therefore, the outflow angle of the airflow can be set independently of the installation position of the second opening 31, and the design of the device can be facilitated.

FIG. 4 is a side sectional view of an embodiment provided with the airflow intake means 35, and FIG. 5 is a perspective view showing an example of the airflow intake means 35.

In the present embodiment, since the airflow intake means 35 is provided at the lower front side of the second opening 31, the effect of separating the airflow of the magnetic disk 2 is improved, and furthermore, by adjusting the set angle of the airflow intake means 35, The outflow angle of the airflow can be changed over a wide range.

6 and 7 are side sectional views of an embodiment provided with another airflow guiding means. In the embodiment shown in FIG. 6, an airflow guide means 33 for changing the direction of the airflow taken in from the second opening 31 is attached to the lower side behind the opening, and in the embodiment shown in FIG. An airflow blocking means 36 is provided in front of the lower end of the opening, an airflow reflecting means is provided behind the lower end of the opening, and a shroud 37 is provided around the rotation area of the magnetic disk 2 up to the opening. It is formed.

In any of these embodiments, sufficient cooling air can be supplied to a heating element such as a read / write IC as in the above embodiments.

FIG. 8 and FIG. 9 are perspective views showing means for imparting a flow velocity distribution to the air flow.

In general, in a magnetic disk drive, a read / write IC 34 is usually installed on the transducer support means 5, and in particular, at least one of these many support means 5 controls the positioning of the transducer 3.
Equipped with IC. This IC generates more heat than the read / write IC. Therefore, it may be desirable to focus the cooling of the transducer positioning IC.

Therefore, in order to mainly cool the central portion in the horizontal direction in the figure, in the example of FIG. 8, the center of the second opening 31 of the barrier 16 is made larger than the left and right ends, and in the example of FIG. The cross-sectional area of the two openings 31 is reduced.

In these embodiments, since the distribution of the deceleration of the airflow can be varied in the left and right directions in the drawing, it is possible to mainly cool the portion that generates a large amount of heat while cooling a wide area in the left and right directions.

It should be noted that even if the shape of the airflow guiding means is changed, the distribution of the flow velocity can be given.

FIG. 10 is a side sectional view showing an embodiment in which an airflow blocking means and a partition are used together. In the present embodiment, the airflow blocking means 36 is provided in front of the lower end of the first opening 31 and the partition 21 surrounding the filter 18 is formed below the barrier 16.

Therefore, in the present embodiment, the barrier 16 is closed except for the first to third opening portions, and all the air once brought into the drive mechanism installation section 15 side is filtered through the filter 18 and filtered, and the rotating disk installation section is Returning to the 14 side improves the dust collection effect.

FIG. 11 is a perspective view showing an example of an opening which also aims to prevent magnetic flux leakage. A wire net 38 is attached to the second opening 31.

In this embodiment, the wire mesh can also serve as a magnetic shield in addition to the airflow rectification effect.

In the above embodiments, the read / write IC and the like mounted on the support means 5 are first cooled,
10 was an example of cooling.

In fact, the path to the voice coil 10 is long,
Since there is a flexible printed circuit board in the space on the way, the air flow is diffused at the position of the voice coil 10, and a flow velocity sufficient for cooling may not be obtained. In order to solve this problem, it is considered that the airflow should be directly guided to the position of the voice coil 10.

FIG. 12 is a side sectional view showing an embodiment in which an airflow outlet 41b of an airflow guide duct 41 that takes in an airflow from an airflow intake port 41a faces a read / write IC 34 on a transducer, and FIG. 13 is a device shown in FIG. FIG. The side walls 41g and 41h of the airflow guide duct 41 of this embodiment may be replaced by the side walls of the rotating disk installation part 13.

In the present embodiment, first, the read / write IC 34 is cooled, the airflow thereof is guided toward the voice coil 10, and after cooling this portion, the airflow is filtered by the filter 18 and returned to the rotating disk installation unit 14 side. ing. Therefore, read / write IC
This is an advantageous embodiment when the heat generation of 34 is more problematic than the heat generation of the voice coil 10.

FIG. 14 is a side sectional view showing an embodiment in which the outlet of the airflow guide duct is branched into a read / write IC 34 and a voice coil 10 on a transducer, and FIG. 15 is a front sectional view of the apparatus in FIG.

In this embodiment, the airflow outlet is divided into an outlet 41e to the read / write IC 34 and an outlet 41f to the voice coil 10. Therefore, both can be simultaneously and intensively cooled. At this time, if the cross-sectional areas of the outlet 41e and the outlet 41f are changed, the blowing ratio in both directions can be adjusted.

〔The invention's effect〕

According to the present invention, an air flow accompanying rotation of a rotating disk such as a magnetic disk can be accurately guided to a heat-generating portion such as an IC or a voice coil that requires cooling, and can be sufficiently cooled. Since the positioning error of the transducer due to runaway or thermal expansion is eliminated, a highly reliable rotating disk storage device can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a basic embodiment of a rotating disk type storage device (closed magnetic disk device) according to the present invention, FIG. 2 is a side sectional view of an embodiment provided with airflow guide means, and FIG. FIG. 4 is a perspective view showing an example of the airflow guiding means, FIG. 4 is a side sectional view of the embodiment provided with the airflow capturing means, FIG. 5 is a perspective view showing an example of the airflow capturing means, and FIGS. 8 and 9 are perspective views showing a means for imparting a flow velocity distribution to an air flow, and FIG. 10 is an embodiment in which an air flow prevention means and a partition are used in combination. FIG. 11 is a perspective view showing an example of an opening aiming at a magnetic flux leakage prevention effect, and FIG. 12 is a side sectional view showing an embodiment in which an outlet of an airflow guide duct is arranged in a signal processor of a transducer. FIG. 13 is a front sectional view of the apparatus in FIG. 12, and FIG. Sectional side view showing an embodiment in which branch to the signal processor portion and the voice coil portion of the Sudeyusa, the
FIG. 15 is a front sectional view of the apparatus in FIG. DESCRIPTION OF SYMBOLS 1 ... Rotation axis, 2 ... Disk (magnetic disk), 3 ... Transducer, 4 ... Slider, 5 ... Support means, 6 ... Mounting means, 7
…… Ball bearing, 8… Guide rail, 10… Voice coil, 11… Magnet, 12… Driving means, 14… Rotating disk installation part, 15… Driving mechanism installation part, 16 ……
Barrier, 18 Filter, 20 Third opening, 30 First opening, 31
... second opening, 33 ... airflow guiding means, 34 ... signal processing IC of transducer, 35 ... airflow intake means, 36 ... airflow blocking means, 37 ...
Shroud, 38 ... Wire mesh, 41 ... Airflow guide duct.

 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Takeshi Takahashi 2880 Kozu, Kozuhara, Odawara-shi, Kanagawa Prefecture Inside the Odawara Plant, Hitachi, Ltd. 72) Inventor Mikio Tokuyama 502 Kandate-cho, Tsuchiura-shi, Ibaraki Pref. In Hitachi, Ltd.Mechanical Research Laboratory Co., Ltd. 63-263688 (JP, A)

Claims (7)

(57) [Claims] 1. A rotating disk type having at least one disk mounted on a rotating shaft, a transducer movably supported opposite the disk, and driving means for supporting and moving the transducer in a predetermined direction. In the storage device, mounted on the disk and the transducer support means
A barrier is provided between IC and an opening including an intersection of a tangent line to the disk and the barrier from the existence range of the IC mounted on the transducer support means is formed on the barrier, and by rotating the disk, A rotating disk storage device characterized in that a part of the generated airflow is forcibly guided to the IC and cooled. 2. A rotating disk type having at least one disk mounted on a rotating shaft, a transducer movably supported opposite the disk, and driving means for supporting and moving the transducer in a predetermined direction. In the storage device, mounted on the disk and the transducer support means
An opening including an intersection of a tangent to the disc and an intersection of the barrier from the existence range of the IC mounted on the transducer support means, and an upper rear side of the opening; A rotating disk storage device characterized in that airflow guiding means is provided in close proximity to the IC and a part of an airflow generated by rotation of the disk is forcibly guided to the IC and cooled. 3. The rotating disk storage device according to claim 2, wherein the opening or the airflow guide means distributes a flow velocity in the airflow such that an airflow velocity from the opening is maximum in the IC direction requiring cooling. A rotating disk type storage device characterized in that the storage device has a shape having a shape. 4. A rotating disk type having at least one disk mounted on a rotating shaft, a transducer movably supported opposite the disk, and driving means for supporting and moving the transducer in a predetermined direction. A rotating disk type storage device, comprising: an air flow guide duct for forcibly guiding a part of an air flow generated by the disk rotation to the IC mounted on the transducer support means for cooling. 5. The rotating disk type storage device according to claim 4, wherein an outlet of the airflow guide duct is branched into the IC mounted on the transducer support means and a heating element of the drive means. Features a rotating disk storage device. 6. A rotating disk storage device according to claim 4, wherein a plurality of airflow intake ports of said airflow guide duct are provided corresponding to each disk. 7. A rotating disk type having at least one disk mounted on a rotating shaft, a transducer movably supported opposite the disk, and driving means for supporting and moving the transducer in a predetermined direction. In the storage device, a part of an airflow generated by rotation of the disk is separated from the disk, and mounted on the transducer support means.
A rotating disk type storage device provided with means for leading to an IC.