JPS583281B2 - magnetic disk pack device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk pack device used as an external memory of a storage device.

In a magnetic disk pack device, the presence of dust on the surface of a magnetic disk has an adverse effect on recording and reproducing information, so it is necessary to remove dust as much as possible.

For this reason, a method is generally adopted in which this dust is removed by sending clean air to the magnetic disk pack.

Conventionally, it has been common practice to use a blower fan to blow air through an air filter from the bottom or outer periphery of the disk pack.

However, with these methods, the clean air blowing device becomes complicated and large, and blowing air from the bottom has structural limitations due to the relationship with the disk pack rotation shaft, and the lubricant of this rotation shaft may be scattered. that there is a risk of being sent to
In addition, when air is blown from the outer periphery, the air is blown against the centrifugal air flow generated by the rotation of the disk pack, so there are problems such as poor hydrodynamic efficiency.

Furthermore, in the conventional case, the distance between the air filter and the disk bat was large, and therefore dust could get mixed into the air passage between them, making it impossible to obtain sufficiently satisfactory results.

Yet another problem is that in magnetic disk pack devices, the magnetic head drive motor (for example, voice coil motor) serves as a heat source, causing an increase in temperature.

This temperature rise has a negative effect on the performance of the device, so it is necessary to efficiently dissipate the heat.

However, the reality is that sufficient heat dissipation measures have not been taken in the past.

Therefore, in view of the above-mentioned circumstances, it is an object of the present invention to provide a high-performance magnetic disk pack that has a simple structure, can efficiently blow clean air, and has a high heat dissipation effect.

In order to achieve the above object, a magnetic disk pack device according to the present invention has a magnetic disk pack and a magnetic head drive motor provided in a casing, and the magnetic disk pack is rotated by a rotating shaft provided on the bottom wall of the casing. In the magnetic disk pack device, a shroud wall is provided in the casing to form a magnetic disk pack storage chamber and a magnetic head drive motor storage chamber, and a magnetic disk pack rotation center line and a magnetic disk pack rotation center line are formed on the earthen wall of the magnetic disk pack storage chamber. providing an air suction port coaxially, and providing an air outlet communicating with the motor storage chamber on the peripheral wall of the storage chamber, and forming a communication path leading from the motor storage chamber to the suction port along the inner surface of the outer wall of the casing; The present invention is characterized in that a cylindrical air filter is provided in the communication passage near the suction port, and heat radiation fins are provided on the outer surface of the casing.

According to this structure, the air in the magnetic disk pack storage chamber flows in the centrifugal direction as the pack rotates, so that a natural circulation flow of air from the outlet through the communication path and back to the suction port is obtained.

Dust in the circulating air is removed by an air filter.

Moreover, since the air filter is provided close to the suction port above the magnetic disk pack, air with higher purity than in the conventional case is fed into the magnetic disk pack.

Further, heat from the magnetic head drive motor is efficiently radiated from the heat radiation fins while the air is passing through the communication path.

As described above, the magnetic disk pack device of the present invention does not require a blower fan unlike the conventional ones, so it has a simple structure and can be made smaller.Moreover, it has the advantage of not only blowing clean air but also radiating heat. be.

Hereinafter, the present invention will be described in detail based on embodiments with reference to the accompanying drawings.

1 and 2 are a partially sectional plan view and a vertical sectional view, respectively, of the main part of a magnetic disk pack device according to the present invention.

Magnetic disk pack (hereinafter simply referred to as "pack")
1 and a magnetic head drive motor (for example, voice coil motor [VCM], hereinafter simply referred to as "motor") 2 are housed in a casing 3.

This casing 3 consists of a bottom wall 4, an outer peripheral wall 5 and a top wall 6.
It is an octagonal assembled structure consisting of parts.

The interior of the casing 3 is provided with shroud walls 9, 10, 11, 12 which form storage chambers 7 and 8 for the pack 1 and the motor 2, respectively.

That is, a cylindrical shroud peripheral wall 10 having a bottom wall 9 is provided in the center of the casing chamber, and its upper opening is closed with a shroud top wall 11 to form a flat cylindrical pack storage chamber 7.

A rotating shaft 14 of a drive motor 13 fixed to the casing bottom wall 4 projects into the pack storage chamber 7 .

The pack 1 is fixed to the upper end of this rotating shaft by a fastener 15, and is rotated by a drive motor 13.

Additionally, between the casing outer peripheral wall 5 and the shroud peripheral wall 10, four sets of shroud walls 12 extending substantially in the radial direction are provided at a pitch of 90 degrees around the pack rotation center line to form four motor storage chambers 8. There is.

The motor 2 is provided in the storage chamber 8 so as to be movable radially and vertically toward the pack rotation center line.

The shroud upper wall 11 is provided with a suction port A coaxially with the pack rotation center line, and the shroud peripheral wall 10 is provided with a suction port B that communicates with each motor storage chamber 8.

Furthermore, an annular groove 21 is formed on the inner surface of the casing bottom wall 4 and projects toward the bottom surface, and the motor storage chamber 8 is inserted into this annular groove 21 through the hole 17 of the motor board 16, as shown in FIG. It's communicating.

Furthermore, an inner wall 22 is integrally formed inside the casing outer peripheral wall 5 as shown in FIG. It communicates with an annular groove 21 in the wall.

Furthermore, a space 24 is formed between the casing upper wall 6 and the shroud upper wall 11, and this space 24 is
As shown in the figure, it communicates with the upper end of the front air space 23 via its periphery.

The space 24 is connected to the pack storage chamber 7 through the suction port A.
It is connected to.

That is, the annular groove 21 of the casing bottom wall 4, the inner space 23 of the casing outer peripheral wall 5, and the inner space 24 of the casing upper wall 6 connect the air outlet B of the pack storage chamber 7 to the inner surface of the casing outer wall through the motor storage chamber 8. A communication path for communicating with the suction port A is formed along the line.

A cylindrical air filter 25 is disposed coaxially with the suction port A in the vicinity of the suction port A of the communication passage, that is, in the space 24, and is held in a tightened state by the casing top wall 6 and the shroud top wall 11. has been done.

The air filter 25 is for removing dust from the air circulating from the air outlet B to the air inlet A so that clean air is sent to the pack storage chamber 7, as will be described later.

Further, as is clear from FIG. 1, a large number of heat radiation fins 26 and 27 are provided on the outer surfaces of the outer circumferential wall 5 and the upper wall 6 of the casing 3, respectively.

Furthermore, heat absorption fins 28 are provided on the inner surface of the space 23 of the casing outer peripheral wall 5.

These heat radiation fins and heat absorption fins are for efficiently dissipating the heat transferred from the motor 2 to the circulating air and the heat transferred from the drive motor 13 to the casing 3 into the atmosphere.

Next, the clean air blowing function and heat dissipation function of the magnetic disk pack device having the above-described configuration will be explained.

When the pack 1 is rotated by the drive motor 13, the air in the pack storage chamber 7 flows hydrodynamically from the rotation center of the pack to the rotation periphery.

Therefore, the air pressure at the periphery of the pack storage chamber becomes higher than the pressure at the center.

Due to this pressure difference, the air in the surrounding area flows out from the outlet B,
Motor storage chamber 8, communication path (that is, annular groove 21, space 23
, 24) and the air filter 25, and flows into the suction port A.

That is, natural circulation of air occurs within the casing 3 as shown by the arrows in FIG.

As a result, the dust or floating dust on the surface of the magnetic disk in the pack 1 is removed by the clean air from the suction port A immediately after passing through the air filter 25, flows out from the air outlet B, and then passes through the air filter 25 again. Only clean air that is removed by passing through the inlet A is blown from the suction port A.

Since the air filter 25 has a cylindrical shape, it has a large filtration area, so that a high cleaning effect and sufficient ventilation can be ensured, so that it is possible to obtain an effective dust removal effect in the pack storage chamber.

In addition, since the air filter 25 is installed immediately upstream of the suction port A, there is no risk of dust entering the clean air after it has been filtered before reaching the suction port A, resulting in extremely clean air. High-temperature air is sent into the pack storage chamber 7.

The air from the air outlet 21 removes heat from the motor 2 as it flows through the motor storage chamber 8, and this heat is transferred directly from the outer wall of the casing 3 or from the heat absorption fins 28 and heat radiation fins 26, 27 while flowing through the communication path. It can be efficiently dissipated into the atmosphere.

Furthermore, heat from the drive motor 13 is also transmitted to the outer wall of the casing and is dissipated into the atmosphere in the same manner as described above.

This can prevent a rise in temperature within the casing chamber.

As is clear from the above description, in the magnetic disk pack device of the present invention, clean air can be efficiently blown to the magnetic disk pack and an effective heat dissipation effect can be obtained, so that the specified performance of the magnetic disk pack device can be achieved. can be maintained and reliability can be improved.

Furthermore, since this device does not require a blower fan as in the past, it has a simple structure and can be miniaturized, making it an extremely practical device.

[Brief explanation of drawings]

Figure 1 is a diagram showing the main parts of the magnetic disk pack device according to the present invention, and is a partially sectional plan view taken along the line ■-■ in Figure 2; FIG. In the figure, 1...magnetic disk pack, 2...
...Magnetic head drive motor, 3...Casing, 4...Casing bottom wall, 5...
・Casing outer peripheral wall, 6...Casing upper wall,
7...Magnetic day pack storage room, 8...
...Magnetic head drive motor storage chamber, 9, 10, 11, 1
2...Shroud wall, 13...Drive motor, 14...Rotating shaft, A...Suction port, B...Blowout port, 21... annular groove, 2
2...Inner wall, 23,24...Space, 2
5... Air filter, 26, 27...
...radiating fin, 28... heat absorbing fin.

Claims (1)

[Claims] 1. In a magnetic disk pack device in which a magnetic disk pack and a magnetic head drive motor are provided in a casing, and the magnetic disk pack is rotated by a rotating shaft provided on the bottom wall of the casing, a shroud wall is provided in the casing. A magnetic disk pack storage chamber and a magnetic head moke storage chamber are formed, and an air suction port is provided in the earthen wall of the magnetic disk pack storage chamber coaxially with the rotation center line of the magnetic disk pack, and the above-mentioned motor is provided in the peripheral wall of the storage chamber. An air outlet communicating with the storage chamber is provided, and a communication path is formed from the motor storage chamber to the suction port along the inner surface of the outer wall of the casing, and a cylindrical air filter is provided near the suction port of the communication path, Furthermore, a magnetic disk pack device is characterized in that a radiation fin is provided on the outer surface of the casing.