JPH06195961A - Information processor - Google Patents

Abstract

PURPOSE:To well cool the heat generating part of a supply device by directly connecting a heat radiating device to this heat generating part and releasing the heat of the heat generating part by exposing this heat radiating device outside through the aperture of a housing and to prevent dust and to miniaturize the device by sealing the heat radiating device and the aperture from each other. CONSTITUTION:The heat radiating part 31 is integrally mounted to the front surface part of an external magnetic field device 9. This heat radiating member 31 is constituted of a metallic material having a good thermal conductivity in order to transfer heat to the entire part of the heat radiating surface and is exposed outside via the front surface aperture 25 of the device body 1. The heat of a high-temp. state is released from a coil 16 for magnetic field generation of the external magnetic field 9 and this heat is directly released outside via the heat radiating member 31. Then, there is no need for using a large cooler in order to maintain the ambient temp. of a magneto-optical disk 13 at an adequate temp. The size and weight of the device are thus reduced. Further, the heat radiating member 31 and the aperture 25 are sealed from each other, by which the dustproofing of the housing is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device applied as, for example, a magneto-optical disk device.

[0002]

2. Description of the Related Art A magneto-optical disk device has an entrance / exit at the front surface of its main body, and a disk cartridge is inserted from this entrance / exit. The inserted disc cartridge is taken in by the loading mechanism, and the shutter of the disc cartridge is opened so that the magneto-optical disc inside the disc cartridge is mounted on the rotary drive unit.

A head base is provided in the magneto-optical disk device, and an optical head and the loading mechanism are attached to the head base. The loading mechanism includes a loading gear motor and a loading cam that is horizontally driven by a pinion gear. The operation of the loading cam causes the cartridge holder to move up and down to move the magneto-optical disk. Is attached to and detached from the rotary drive unit.

On the other hand, an external magnetic field device is attached to the upper surface of the cartridge holder, and the external magnetic field device moves up and down together with the cartridge holder. The external magnetic field device includes an outer yoke and a center yoke made of a magnetic metal material.
And a coil for generating a magnetic field. The external magnetic field device generates a magnetic field substantially perpendicular to the magneto-optical disk when erasing information on the magneto-optical disk or when writing information on the magneto-optical disk.
The direction of this magnetic field is opposite between the time of erasing information and the time of writing.
Normally, when writing information on a magneto-optical disk, it is necessary to erase the information before writing it. Therefore, when writing at high speed, it is necessary to increase the reversal speed of the magnetic field.

The optical head has an objective lens facing the magneto-optical disk and is guided in the radial direction of the magneto-optical disk along a guide rail. Then,
When information processing is performed on the magneto-optical disk mounted in the magneto-optical disk device, laser light is oscillated from the laser oscillator in the disk device. This laser light is applied to the magneto-optical disk through an optical element such as a collimating lens, a rising mirror and an objective lens. The laser light applied to the magneto-optical disk is reflected from the magneto-optical disk, passes through the objective lens, and is sent back to the optical elements such as the rising mirror and the prism to be received by the light receiving element for information processing. It

By the way, in the above-described magneto-optical disk device, dust and dirt may enter from the outside and adhere to the optical element through which the laser light passes.
If dust is attached, there is a risk that reading and writing of information will become impossible. For this reason, at least the objective lens, the external magnetic field device, the loading mechanism, and the medium installation space in which the disk cartridge is arranged in the main body of the magnetic disk device have a sealed structure. As a result, the amount of air in the main body that replaces the outside air is reduced, and the amount of dust and dust that enters with the air is reduced.

On the other hand, in the apparatus body, the external magnetic field device generates a large amount of heat from the coil for generating the magnetic field. As the external magnetic field device, there is a permanent magnet rotation system that changes the direction of the magnetic field by rotating the permanent magnet by an electromagnetic force in addition to the electromagnet system that uses an electromagnet. However, even in this case, a coil for generating an electromagnetic force is required, and when it is rotated frequently, it generates heat of the same degree as that of the electromagnet method.

The heat generated in the external magnetic field device is 3
Heat is dissipated through two routes. The first path is a path through which heat generated from the external magnetic field device is transferred to the air in the device body, and the air is transferred from the air to the wall of the device body and further from the wall to the outside of the device body. However, in this path, the heat of the external magnetic field device is not sufficiently dissipated because the thermal conductivity of the air on the wall of the device body is poor.

The second path is a path through which the heat generated from the external magnetic field device is dissipated to the outside of the device body through the loading mechanism. That is, the heat generated from the external magnetic field device is
It is transmitted to the ridge holder and then to the head base via the loading cam of the loading mechanism. However, in this path, since the cartridge holder and the loading cam, and the loading cam and the head base are connected via a small part such as a pin, the contact area is small, and Since the heat transfer path is long and the thermal resistance is large, a large amount of heat is transferred to the air inside the apparatus main body during the heat conduction. Therefore, this path does not contribute much to the heat dissipation of the external magnetic field device.

The third path is a path through which heat is directly transferred from the external magnetic field device to the top plate of the main body of the device by heat radiation, and the heat is radiated. However, in this path, the top plate and the external magnetic field device are metal sheet metal parts, and the surface thereof is a surface such as a metal oxide surface with a small heat emission rate, so the heat dissipation effect by this path is poor.

As described above, in the conventional magneto-optical disk device, the thermal resistance between the external magnetic field device and the outside of the magneto-optical disk device is large, and the heat generated by the external magnetic field device is not easily dissipated. Temperature rises. If the temperature inside the apparatus body rises in this way, the magneto-optical disk, which is inserted into the apparatus body and is susceptible to high temperatures, will be damaged by heat.

For this reason, a powerful cooling fan is provided in the apparatus and the apparatus body is cooled by this cooling fan. However, if the powerful cooling fan is provided, the magneto-optical disk device becomes large in size, and there is a problem that a large noise is generated due to the rotation. Therefore, an object of the present invention is to provide an information processing apparatus that can cool the inside of the apparatus body satisfactorily while maintaining the dustproof performance without requiring a large-scale cooling apparatus.

[0013]

In order to solve the above-mentioned problems, the present invention has a heat generating portion for generating heat when a magnetic field is generated, and supplies a magnetic field to an information storage medium, and a magnetic field generated by the supplying means. A housing for housing the supply means and the light irradiation means, and a light irradiation means for irradiating the area of the information storage medium supplied with a light beam so as to change the recorded information of the information storage medium, and a housing having an opening. A body, a heat radiating means which is directly connected to the heat generating part of the supplying means and is exposed to the outside through the opening of the housing to radiate the heat of the heat generating part, and is provided between the heat radiating means and the opening. And a sealing means for sealing the housing.

[0014]

A large-scale cooling device is constructed by directly connecting a heat radiating means to the heat generating portion of the supply means and exposing the heat radiating means to the outside through the opening of the casing to radiate the heat of the heat generating portion. Can be satisfactorily cooled without the need for the above, and the housing is protected from dust by sealing the space between the heat radiating means and the opening with the seal means.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The magneto-optical disk device of the present invention will be described below with reference to FIGS.
Description will be made with reference to an embodiment shown in FIG. FIG. 1 is a perspective view showing the external appearance of a magneto-optical disk device, in which 1 is a device body as a casing. A front panel 3 of the apparatus main body 1 is provided with an entrance / exit 3a for inserting and removing a disc cartridge 12 which will be described later.

A heat radiating member 31 is provided on the upper surface of the apparatus main body 1, and side covers-3 are provided on both sides.
2 are provided. Bottom frames 11 are provided on the lower sides of the side covers 32 and 32, respectively.
Reference numeral 22 in the drawing denotes a circuit board on which electronic components are mounted. Also,
FIG. 2 is an exploded view of the magneto-optical disk device. In the figure, 6 is a head base, and a disk cartridge 12 described later is taken into the head base 6 and conveyed, and as a data storage medium thereof. A loader as a loading means for mounting the magneto-optical disk 13 on a rotation drive unit (not shown).
The binding mechanism 19 is attached.

The loading mechanism 19 includes a cartridge holder 8 which holds the disc cartridge 12. The cartridge holder 8 can be moved up and down by the loading cams 7, 7 sliding by the gear motor, via the pins 8a, 8a.
The vertical movement of the cartridge holder 8 causes the holder guide 23 to move.
Guided by.

An external magnetic field device 9 as a supplying means for applying a magnetic field to the disk 13 as an information storage medium in the disk cartridge 12 is attached to the upper surface of the cartridge holder 8 and Move up and down with the ridge holder 8 A circuit board 21 on which electric components are mounted is provided on the bottom of the apparatus body 1.

As shown in FIGS. 3 and 4, the external magnetic field device 9 has an outer yoke 14 and a center yoke made of a magnetic metal material.
It is composed of a coil 15 and a coil 16 as a heat generating portion. The external magnetic field device 9 generates a magnetic field almost perpendicular to the magneto-optical disk 13 when erasing or writing information on the magneto-optical disk 13. The direction of this magnetic field is opposite between the time of erasing information and the time of writing. Normally, when writing information on the magneto-optical disk 13, the information must be erased before the writing. Therefore, when writing at high speed, it is necessary to increase the reversal speed of the magnetic field.

On the lower side of the magneto-optical disk 13, an optical head 18 as a light irradiating means for reading and writing information is provided. The optical head 18 is provided with roller pairs 17, 17 on both sides thereof, respectively.
The pair of rollers 17, 17 are brought into contact with the guide rails 24, 24 to be guided along the radial direction of the magneto-optical disk 13.

The apparatus body 1 includes a front panel 3, a head base 6, a bottom cover 20, and a side cover 32.
Etc. By the way, the external magnetic field device 9
The above-mentioned heat dissipation member 31 is integrally attached to the upper surface portion of the. Since the heat dissipation member 31 transmits heat to the entire heat dissipation surface, it is made of a metal material having good heat conductivity and is exposed to the outside through the upper surface opening 25 of the apparatus body 1.

The heat dissipating member 31 has bent portions 31a, 31a bent downward on both sides thereof, and bent portions 31b bent downward on the back surface thereof. The inner surface of the bent portions 31a, 31a, 31b of the heat dissipation member 31 and the front end of the heat dissipation member 31 are made of rubber.
A closing member (moving member) 33 as a means for
The closing member 33 is in contact with the inner surface of the front panel 3 and the outer surfaces of the side covers 32 and 32, respectively.

Due to the closing member 33, the apparatus body 1
The opening 25 on the upper surface of the is hermetically shielded from the outside. When the information processing is performed on the magneto-optical disk 13, the disk cartridge 12 is inserted from the entrance / exit 3a of the apparatus body 1. The inserted disc cartridge 12 is taken into the main body 1 of the apparatus by the cartridge holder 8.

Thereafter, the cartridge holder 8 is lowered, the shutter (not shown) of the disk cartridge 12 is opened, and the magneto-optical disk 13 is mounted on the rotary drive section and driven to rotate. At this time, a magnetic field is applied to the disk 13 from the external magnetic field device 9, and further laser light is emitted from a laser oscillator (not shown). The laser light is focused on the magneto-optical disk 13 via an optical element such as a collimating lens, a rising mirror 17, and an objective lens 18a. The laser light applied to the magneto-optical disk 13 is reflected from the magneto-optical disk 13, is sent back to the optical elements such as the objective lens 18a, the rising mirror 18b and the prism, and is received by the light receiving element for information processing. It

At the time of this information processing, high-temperature heat is radiated from the magnetic field generating coil 16 of the external magnetic field device 9, and this heat is radiated to the outside directly via the heat dissipation member 31. As described above, since the heat dissipation member 31 is provided on the upper surface of the external magnetic field generator 9 and the heat dissipation member 31 is exposed to the outside through the opening 25 of the device body 1, heat generated in the external magnetic field generator 9 is generated. Can be directly discharged to the outside, and the heat dissipation effect is high.

Therefore, unlike the prior art, in order to maintain the ambient temperature of the magneto-optical disk 13 at an appropriate temperature, it is not necessary to use a large cooling device, the manufacturing cost is reduced, the size is small,
The weight can be reduced. Further, since the gap between the peripheral edge of the opening 25 of the apparatus body 1 and the heat dissipation member 31 is shielded by the shielding member 33, dust and dirt enter the apparatus body 1 and optical elements such as the objective lens 18a. Good information processing is possible without sticking to the.

The present invention is not limited to the above embodiment,
The exposed surface of the heat dissipation member 31 may be coated with a substance having a high heat injection rate such as paint, paper, and resin film. According to this, the heat transmitted to the outside by radiation is increased, and the cooling effect is further improved. Further, the present invention is not limited to the above-mentioned embodiment, and may be configured as shown in FIGS.

In the embodiment shown in FIGS. 7 and 8,
An opening 42a is formed in the top cover 42 of the apparatus body 41, a heat dissipation member 43 is provided on the upper surface of the external magnetic field device 9, and the heat dissipation member 43 is exposed to the outside through the opening 42a. The outer peripheral portion of the heat dissipation member 43 and the opening 42
The gap between the inner peripheral edge of a is closed by providing a bellows membrane 44 having a bellows structure as an elastic member.

When the cartridge holder 8 moves up and down, the external magnetic field generator 9 and the heat dissipation member 43 move up and down, and the bellows film 44 expands and contracts accordingly. According to this embodiment, the heat generated from the external magnetic field generation device 9 is directly radiated to the outside from the heat dissipation member 43, and the inside of the device main body 41 is not in a high temperature state. Further, dust and pride that try to enter the inside of the apparatus body 41 through the opening 42a of the top cover 42 of the apparatus body 41 are blocked by the bellows membrane 44 and do not enter the inside.

Further, according to the present invention, a closing member for closing the space between the outer peripheral edge of the heat dissipation member 43 and the inner peripheral edge of the opening 42a may be installed loosely. In this case, the gap between the outer peripheral edge of the heat radiating member 43 and the inner peripheral edge of the opening 42a can be closed by following the vertical movement of the heat radiating member 43, even if the closing member does not have a bellows structure. You can

Further, in the present invention, the closing member may be made of an elastic member such as a rubber film. In addition, the closing member in the present invention may be any one as long as it is easily deformed as the heat radiating member 43 moves in the vertical direction and does not hinder the movement of the heat radiating member 43. Be prepared.

[0032]

As described above, the present invention has a heat generating portion that generates heat when a magnetic field is generated, and supplies the magnetic field to the information storage medium, and the magnetic field supplied by the supplying means. A light irradiating means for irradiating a light beam on the area of the information storage medium so as to change the recorded information of the information storage medium, a housing for accommodating the supplying means and the light irradiating means and having an opening, and the supply. A heat-dissipating means that is directly connected to the heat-generating part of the heat-dissipating means and is exposed to the outside through the opening of the housing to radiate the heat of the heat-generating part; Since it is equipped with a sealing means for cooling, the heat of the heat generating portion of the supply means can be satisfactorily released to the outside, cooling can be performed without the need for a large-scale cooling device, and downsizing can be achieved. It becomes possible and produces a lot of noise Nor. Further, since the space between the heat radiating means and the opening is sealed by the sealing means, the dustproof effect is also excellent.

[Brief description of drawings]

FIG. 1 is a perspective view showing a magneto-optical disk device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the magneto-optical disk device of FIG.

3 is a cross-sectional view showing a state in which an external magnetic field device of the magneto-optical disk device of FIG. 1 is lifted.

4 is a cross-sectional view showing a state where the external magnetic field device of the magneto-optical disk device of FIG. 1 is lowered.

5 is a side sectional view showing a state where an external magnetic field device of the magneto-optical disk device of FIG. 1 is lifted.

6 is a side sectional view showing a state in which the external magnetic field device of the magneto-optical disk device of FIG. 1 is lowered.

FIG. 7 is a perspective view showing a magneto-optical disk device according to another embodiment of the present invention.

8 is a sectional view showing the magneto-optical disk device of FIG.

[Explanation of symbols]

1 ... Device main body (housing), 16 ... Coil (heating part), 13
... magneto-optical disk (information storage medium), 9 ... external magnetic field device (supplying means), 18 ... optical head (light irradiating means), 25 ...
Openings, 31, 43 ... Radiating members (radiating means), 33, 4
4 ... Closing member (sealing means).

Claims (3)

[Claims] 1. A supply means for supplying a magnetic field to an information storage medium, comprising a heat generating portion for generating heat when a magnetic field is generated, and an information storage medium in the area of the information storage medium to which the magnetic field is supplied by the supply means. A light irradiating means for irradiating a light beam so as to change the recorded information, a housing containing the supply means and the light irradiating means, and having an opening, and a heat generating part of the supply means. A heat radiating means that is exposed to the outside through the opening of the housing and radiates the heat of the heat generating portion; and a seal means provided between the heat radiating means and the opening to seal the housing, An information processing apparatus comprising: 2. A sliding member, wherein the supplying means and the heat radiating means are movably provided, and the seal means slides along a side wall surface of the casing as the supplying means and the heat radiating means move. The information processing apparatus according to claim 1, further comprising: 3. The supply means and the heat radiating means are movably provided, and the seal means is an expandable member which expands and contracts as the supply means and the heat radiating means move. Information processing equipment.