JPS583166A - Magnetic disc device - Google Patents

Abstract

PURPOSE:To make uniform the temperature distribution in a device, by fixing one end of a heat pipe absorbing heat to a part of an enclosed disc device and another end to a radiator provided at the outside of the device. CONSTITUTION:A magnetic disc and the like are provided on a substrate 2 provided in a case 1 and enclosed with a case cover 12. One end of two heat pipes 13 in parallel is fixed to the lower surface of the substrate 2 to be closed thermally. Another end of the heat pipes is projected at the outside of the case 1 and fixed to a radiator 14 consisting of a plurality of radiating plates provided at the outside of the case. Heat dissipated from a disc rotating part 6 and a head arm driving section 10 is delivered to the heat pipe through the substrate 2. Through the self-balance of heat provided for the heat pipe, each member is uniformly cooled, allowing to uniform the temperature distribution in the device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device that can uniformly cool the magnetic disk device itself.

Normally, in a magnetic disk drive, windage damage of the magnetic disk plate of the magnetic disk rotating part, heat generation in the spindle bearing part, heat generation by the head arm drive part, etc.
Non-uniform temperature distribution is formed in the magnetic disk plate, head-gamma assembly, base, case, etc., resulting in misalignment of the magnetic head.

In order to minimize such positional deviation of the magnetic head, it is desirable to minimize the temperature rise of the magnetic disk device.

Therefore, conventionally, magnetic disk drives have been considered in which the temperature rise in the magnetic disk drive is kept to a minimum using an air cooling system.

Such a conventional magnetic r-isk device is shown in FIG.

In FIG. 1, reference numeral 1 denotes a casing, and a rectangular substrate 2 is disposed within the casing 1 with a predetermined space from the bottom surface of the casing 1. As shown in FIG.

Further, a cooling fan 4 is disposed within the left side of the housing 1 via a filter plate 3, and an air outlet 5 is provided at the lower right side of the housing 1.

A rotating magnetic disk rotating section 6 is installed on a substrate 2 disposed within the casing 1 . The magnetic disk rotating section 6 has a spindle 7 and a magnetic disk plate 8.

A head arm drive section 10 for moving the helad arm assembly 9 is installed on the left side of the substrate 2. The head arm assembly 9 is provided with a magnetic head 11 that moves over the magnetic disk plate 8.

Further, a case cover 12 that covers the magnetic disk rotating section 6, head arm assembly 9, and head arm driving section 10 is attached to the substrate 2.

In such a conventional magnetic disk device, air introduced into the housing 1 by the cooling fan 4 passes through the space on the bottom side of the board 2 and the space on the top side of the case cover 12. It is designed to be discharged to the outside from the air outlet 5.
This cools each member such as the υ substrate 2, the case-h/4-12, the magnetic disk rotating section 6, the head arm assembly 9, and the head arm driving section 10.

However, although the cooling effect increases where air is introduced by the cooling fan 4 inside the housing 1 and a large temperature drop is obtained, the cooling effect decreases near the outlet 5 or where the air stagnates, so the overall The drawback is that it is difficult to achieve a uniform temperature distribution.

Furthermore, a space for passing air for cooling must be formed between the casing and the substrate and cover within the casing, which has the disadvantage that the entire device cannot be made into a compact structure.

Furthermore, since a cooling fan is required to introduce cooling air into the housing, there are disadvantages in that noise is generated and power energy consumption increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic disk device which can eliminate the above-mentioned drawbacks, can cool the entire device uniformly and sufficiently, can be made compact, and can reduce noise and save energy.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a planar housing, and a rectangular substrate 2 is placed within the housing 1 with a predetermined space from the lower inner surface of the housing 1. As shown in FIG.

A head arm driving section 10 for moving a magnetic disk rotating section 6 and a head arm assembly 9 is installed on a substrate 2 disposed within a housing 1, as in the conventional example. Also,
A case cover 12 that covers the magnetic disk rotating section 6, head arm driving section 9, and head arm driving section 10 is provided on the substrate 2.
is also installed.

The upper surface of the case cover 12 and the upper inner surface of the housing 1 are brought into substantially close contact with each other.

On the bottom surface of the board 2, there are two heats 9 parallel to each other.
One end of the id 13.13 is fixed in a thermally tight manner. The tip of one end of each heat/mother ide 13 is bent into an arc shape so as to surround the magnetic disk rotating section 6 which generates a large amount of heat.

In addition, the other ends of the two heat pies f13.13 are projected outside the housing 1 so as to be thermally close to the heat dissipation part 14 extending from a plurality of heat sinks provided on the outside of the housing 1. is fixed to.

Each of these heats 9 and 13 is formed by partially enclosing a liquid in a pipe with a low internal pressure, and exhibits extremely low thermal resistance.

Two heat 9 tubes 13 fixed to the bottom surface of the board 2.
13 and the lower inner surface of the housing 1 are brought into substantially close contact with each other.

In a magnetic disk device having such a configuration, heat generated by the magnetic disk rotating section 6, head arm driving section 10, etc. is transmitted to the two heat flat plates 13 and 13 through the substrate 2, and the heat generated by the two heat plates 13 and 13 is The heat transferred to f13.13 quickly moves to the heat radiating section 15, and is radiated by the heat radiating section 14.

In this way, the heat generated by each member such as the magnetic disk rotating section 6 and the head arm drive section IO is transmitted to each heat/mother ear 13 via the substrate 2, but the heat generated by the heat/mother ear 13 is Due to the self-balancing property, each member is cooled uniformly, resulting in a uniform temperature distribution in the magnetic disk device.

In this embodiment, two heat pins 13, 13 are fixed to the substrate 2, but it goes without saying that any number of heat pins 13 or more may be used. In addition, two heat rays 13.13 are fixed to the board 2,
It is not limited to the substrate 2, but may be fixed to the case cover 12, and the magnetic disk rotating section 6 and the head arm driving section 10 may also be fixed to the case cover 12.
It may be fixed to a heat collecting member other than the substrate 2 and the case cover 12 of each member such as.

Furthermore, in this embodiment, the heat dissipation section 1 is placed close to the outside of the housing 1.
5 is provided, but the heat ejector 13 may be extended and provided at a position away from the casing 1.

As explained above, the magnetic disk device of the present invention includes a substrate on which a magnetic disk rotation section, a head arm assembly, and a head arm drive section are installed inside a housing, and a case cover attached to the substrate that covers these components. One end of the heat pipe that absorbs heat is fixed to the heat collecting member, and the other end of the heat pipe is fixed to the heat dissipation part provided outside the housing. The heat generated is transferred to the heat 9 iso through heat collecting members such as the board and case cover, and the heat transferred to the heat 9 is quickly transferred to the heat radiating section, where it is radiated and each component is Cools down sufficiently. However, due to the thermal self-balancing property of the heat pipe, each member is cooled uniformly, resulting in a uniform temperature distribution in the magnetic disk device.

Ita, Heat? Since one end of the heat guide is fixed to the heat collecting member inside the housing, the space inside the housing is only limited to the space where one end of the heat guide is placed, and each member There is no need for a space for air to pass through to cool the system, the casing that houses each member can be made smaller, and the entire device can be made more compact.

Furthermore, since heat pipes are used to cool each component, there is no noise compared to conventional cooling fans, and there is no electrical energy consumption, resulting in lower noise. This has the effect of saving energy.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a conventional magnetic disk device, FIG. 2 is a longitudinal sectional view of a magnetic disk device according to the present invention, and FIG. 3 is a bottom view showing a heat/mother plate of the same magnetic disk device. DESCRIPTION OF SYMBOLS 1... Housing, 2... Substrate, 6... Magnetic disk rotation part, 8... Magnetic disk board, 9... Head arm assembly, 10... Head arm drive part, 11. ...Magnetic head,]2...Case cover, 13...Heat (Eve), 14...Heat dissipation part. Applicant's agent Kiyoshi Inomata

Claims (1)

[Claims] A head arm assembly having a substrate disposed in a housing, a rotating magnetic disk rotation unit installed on the substrate, a magnetic head that moves on the magnetic disk plate, and a head that moves the head arm assembly. In a magnetic disk device comprising an arm drive unit and a case cover attached to the board, one end of a heat pipe that absorbs heat is fixed to a heat collecting member such as the board and case cover in the housing, A magnetic disk device characterized in that the other end of the heat flat ignition is fixed to a heat radiating member provided outside the casing.