JPH08203263A - Apparatus for driving recording disk - Google Patents

Abstract

PURPOSE: To improve the dustproof effect and radiation effect. CONSTITUTION: A chassis 23 where a mechanical part 22 including an optical head 19 is set, a loading mechanism part 24, a circuit board 27, etc., are accommodated in a sealed outer frame body 11 consisting of a frame 12, a front panel 13, a rear panel 14 and an exterior cover 15. The invasion of dust is prevented accordingly. Moreover, elements 26H prone to generate heat are gathered and mounted on the upper surface of the circuit board 27 to be in tight touch with a recessed part 28 of the exterior cover 15 covering the circuit board 27. Therefore, the heat is radiated easily outside through the exterior cover 15 and prevented from being transmitted to the mechanism part 22 on the lower side of the circuit board 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording disk drive device for recording, reproducing or erasing an optical recording disk such as an optical disk or a magneto-optical disk.

[0002]

2. Description of the Related Art FIG. 35 is a schematic configuration diagram of a conventional optical disk drive apparatus, in which reference numeral 1 denotes an exterior frame body composed of a frame 2, a front panel 3, a rear panel 4 and an exterior cover 5. Includes a spindle motor 7 for rotationally driving the optical disc 6, an optical head 8 for optically recording and reproducing information on the optical disc 6, and drive control of the spindle motor 7, the optical head 8 and other components. Therefore, a circuit board 10 on which various electric elements 9 are mounted and the like are stored.

In the above-mentioned optical disk drive device, the temperature inside the device is likely to rise due to the increase in the number of electrical elements 9 such as LSI or the high speed operation of the mechanical portion due to the recent demand for higher performance and higher speed processing. However, in this type of device, extremely high-precision control and optical control are required for the optical disc 6, so that the components are easily affected by the presence of dust and heat rise, and recording, reproduction, and
Furthermore, it will affect the life of the parts.

Therefore, in the optical disk device disclosed in Japanese Patent Laid-Open No. 6-203547, a cooling fan is attached to the rear part of the device so that the disk is cooled so as not to reach a high temperature, in addition to taking measures against dust, a built-in circuit board, etc. The heat generated from the disk is concentratedly discharged to prevent the disk from being heated, and the part where the disk and the optical head are installed is placed in a semi-closed chamber state so that air does not flow even if the cooling fan rotates. ing.

[0005]

In the conventional optical disk drive apparatus of FIG. 35, although the cooling action is received by the cooling fan provided in the computer or the like housing this apparatus, the elements 9 that generate heat on both sides of the circuit board 10 are provided. Since the heat from the heat-generating element 9 is mounted between the circuit board 10 and the exterior cover 5, the cooling effect by the cooling fan is small, and the optical disk 6 and the optical head 8 existing below are heated. There's a problem.

Further, in the optical disk device disclosed in Japanese Patent Laid-Open No. 6-203547, it is very difficult in terms of layout to install the cooling fan within the size specification of the device which is being miniaturized. Even if the cooling fan can be installed within the above range, only a relatively small fan having a small fan thickness and a small diameter can be adopted. If a small fan is simply used, the pressure loss is large and the cooling effect is small. there were.

An object of the present invention is to provide a recording disk drive device which is excellent in dustproof effect and heat dissipation effect, and is also excellent in heatproof effect even when a small fan is used.

[0008]

In order to achieve the above-mentioned object, the present invention provides an optical head for recording / reproducing on / from a recording disk, and a mechanism section for driving each component of the optical head and the recording disk. A recording disk drive device comprising a circuit board on which various elements for controlling the drive of the mechanism part are mounted, and the mechanism part and the circuit board are covered in a substantially sealed state by an exterior frame body. It is characterized in that a heat generating element is mounted on one side surface, the mechanism section is arranged on the other side surface side of the circuit board, and the exterior frame body portion covering the circuit board and the heat generating element are opposed to each other. .

Further, a plurality of the heat-generating elements are mounted on the circuit board so that the side surfaces of the outer frame portion covering the circuit board have substantially the same height, and the heat generating element and the heat-generating element are mounted on the circuit board. It is characterized in that it is brought into contact with.

An optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and a circuit equipped with various elements for controlling the drive of the mechanism section. A recording disk drive device comprising a substrate, the mechanism portion and the circuit board being covered in a substantially sealed state by an outer frame, wherein a heat generating element is mounted on one side surface of the circuit board, and the circuit board is covered. It is characterized in that a recess is formed on the surface of the outer frame facing the heat-generating element so as to match the height of the heat-generating element, and the heat-generating element can be housed so that the heat-generating element is substantially in close contact with the recess.

Further, the heat-generating element is closely attached to the exterior frame via a heat dissipation sheet having elasticity.

Further, the present invention is characterized in that irregularities are formed on the outer side of the outer frame portion that covers the circuit board.

Further, a through hole is formed in the circuit board, a nut member is attached to the through hole, and a screw is screwed into the nut member from the outside of an exterior frame portion covering the circuit board,
It is characterized in that the circuit board can be pulled up by a screw, and the circuit board and the outer frame body are closely fixed.

Further, a through hole is formed in the circuit board, an engaging member is attached to the through hole, and a tapping screw is screwed into the engaging member from the outside of an exterior frame body covering the circuit board. It is characterized in that the circuit board can be pulled up and the circuit board and the outer frame body are closely fixed.

Further, the circuit board and the exterior frame body covering the circuit board are formed of materials having different linear expansion coefficients and fixed to a predetermined exterior frame body.

A suction fan is provided on the rear side of the main body of the apparatus, and an unevenness for air circulation is formed on the outer side of the outer frame covering the circuit board in the direction of the suction port of the suction fan.

An optical head for recording / reproducing on / from the recording disk, a mechanism section for driving each component of the optical head and the recording disk, and a circuit equipped with various elements for controlling the drive of the mechanism section. A recording disk drive device comprising a substrate, wherein the mechanism section and the circuit board are covered in a substantially sealed state by an exterior frame body, wherein a heat generating element is mounted on one side surface of the circuit board, and the other side surface of the circuit board is provided. The heat generating element is arranged on the side of the exterior frame body that covers the circuit board, and the circuit board is attached to the exterior frame body via a sealing material. A closed space is formed between and, and a fan for generating cooling air is provided in the closed space.

An optical head for recording / reproducing on / from the recording disk, a mechanism portion for driving each component of the optical head and the recording disk, and a circuit equipped with various elements for controlling the drive of the mechanism portion. A recording disk drive device comprising a substrate, wherein the mechanism section and the circuit board are covered in a substantially sealed state by an exterior frame body, wherein a heat generating element is mounted on one side surface of the circuit board, and the other side surface of the circuit board is provided. The heat generating element is arranged on the side of the exterior frame body that covers the circuit board, and the circuit board is attached to the exterior frame body via a sealing material. An air circulation space is formed between the air circulation space and a fan for generating cooling air in the air circulation space, and the cooling space is provided from the air circulation space to one side of the circuit board on which the heat generating element is mounted. Characterized by comprising a portion for guiding the.

Further, the heat generating element is mounted with a gap provided on a side portion of the circuit board.

Further, the air intake port and the air outlet port for the fan are provided on substantially the same surface of the rear portion of the exterior frame body.

Further, a partitioning frame body for dividing the air circulation space into a circulation portion and a non-circulation portion for cooling air is provided, and a connector for interfacing the circuit board and the mechanism portion is arranged in the non-circulation portion. It is characterized by being set up.

Further, the partition frame body is integrally formed with a frame body which covers the mechanism portion.

A circuit equipped with an optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each section of the optical head and the recording disk, and various elements for controlling the drive of this mechanism section. In a recording disk drive device including a substrate, a temperature detection means for detecting a temperature inside the device, a drive means for driving the mechanism section at any one of at least two different operation speeds, and the temperature detection means for detection. And a control means for selectively setting the operating speed according to the temperature that has been set.

An optical head for recording / reproducing on / from the recording disk, a mechanism section for driving each component of the optical head and the recording disk, and a circuit equipped with various elements for controlling the drive of the mechanism section. In a recording disk drive device including a substrate and a fan that generates cooling air in the device, a drive unit that drives the mechanism unit at any one of at least two different operation speeds, and the drive unit according to the operation speed. And a rotation speed control means for changing the rotation speed of the fan.

An optical head for recording / reproducing on / from the recording disk, a mechanism section for driving each component of the optical head and the recording disk, and a circuit equipped with various elements for controlling the drive of the mechanism section. In a recording disk drive device including a substrate and a fan for generating cooling air in the device, a rotation speed control means for changing the rotation speed of the fan in accordance with a difference in operating states such as recording, reproduction and standby. It is characterized by having.

An optical head for recording / reproducing on / from the recording disk, a mechanism section for driving each component of the optical head and the recording disk, and a circuit equipped with various elements for controlling the drive of the mechanism section. In a recording disk drive device including a substrate and a fan for generating cooling air inside the device, a first temperature detection means for detecting the temperature inside the device and a second temperature detection for detecting the temperature outside the device. Means and rotation speed control means for changing the rotation speed of the fan based on the detection results of the both temperature detection means.

The heat-generating element is mounted on the circuit board near the fan for generating the cooling air.

[0028]

In the recording disk drive device according to the present invention having the above-described structure, an element that generates heat (hereinafter referred to as a heat generating element) is provided on one side surface of the circuit board, and the element is installed facing or brought into contact with the outer frame body, and The generated heat is efficiently released from the body to the outside, and the temperature rise of the mechanical portion including the optical head is suppressed.

A heating element is provided on one side of the circuit board,
By forming a recess for accommodating substantially the entire heating element in the outer frame, the heat of the heating element is efficiently radiated from the outer frame to the outside. Further, since the mechanism portion and the circuit board are covered with the outer frame body in a substantially sealed state, there is also a dustproof effect.

The heat dissipation is improved by bringing the heat generating element and the exterior frame into close contact with each other via a heat dissipation sheet having elasticity.

By providing irregularities on the outside of the outer frame body to increase the surface area, the cooling effect of the outer frame body is increased, and the heat dissipation is further improved.

By allowing the circuit board to be pulled up with respect to the outer frame with screws and tapping screws, even if the circuit board is warped, the circuit board is pulled closer to the outer frame, thereby increasing the adhesion between the two. , Heat dissipation is improved.

Further, by making the linear expansion coefficients of the materials of the circuit board and the exterior frame different from each other, in the circuit board and the exterior frame which are in a fixed relationship with each other, the exterior frame is warped inward by receiving heat, The degree of contact with the heating element on the circuit board increases,
Heat dissipation is improved.

Further, since the outer surface of the outer frame is provided with irregularities so as to generate an air flow from the front of the outer frame by the suction fan, the cooling effect of the outer frame is increased and the heat radiation is improved. Good quality.

A heating element is provided on one side of the circuit board,
By disposing this heating element on the side of the exterior frame and forming a closed space for sending cooling air between the other side of the circuit board and the mechanism, heat is efficiently released from the exterior frame to the outside. At the same time, the closed space serves as an air insulation layer,
The temperature rise of the mechanical section including the optical head is effectively suppressed.

By guiding the cooling air to the one side of the circuit board where the heating element is provided, with the closed space as an air circulation space, the heating element is also cooled and the circuit operation is stabilized. In addition, the cooling effect is increased by allowing a cooling air to flow with a space provided between the heating element and the circuit board.

By providing the inlet and outlet of the cooling air on substantially the same surface of the rear portion of the exterior frame body, a space for the cooling air flow can be taken without affecting the built-in system.

A non-circulation portion for cooling air is formed by the partitioning frame body or a frame body that covers the mechanism portion in the air circulation space portion, and a connector or other interface body such as a connector is arranged in the non-circulation portion. Since this arrangement portion is distinguished from the air circulation portion, it is possible to prevent dust in the cooling air from entering and adhering to the mechanism portion including the optical head from the arrangement portion of the connecting body.

Further, by changing the operating speed of the mechanical section in a range that does not substantially affect recording and reproduction according to the temperature inside the device, heat generation due to the operation from the mechanical section is reduced,
Controls the temperature inside the device.

In addition, the number of rotations of the fan for sending the cooling air into the apparatus is determined by the operating speed and operating state of the mechanism section including the optical head,
By changing according to the temperature inside and outside the device, even a small-sized and low-capacity fan can effectively blow air according to the situation, so that the device can be downsized and the power consumption can be reduced.

By arranging the heating elements collectively near the fan, the heating elements are concentrated and cooled, and the cooling effect is enhanced.

[0042]

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

FIG. 1 is an exploded perspective view of the first embodiment of the present invention,
FIG. 2 is a cross-sectional view of the first embodiment after assembly, in which 11 is an exterior frame body including a frame 12, a front panel 13, a rear panel 14, and an exterior cover 15, and the frame 12 is a recording disk on the front side. The front panel 13 provided with an opening / closing door 18 for taking in and out the disc cartridge 17 containing the optical disc 16 is fixed, and the rear panel 14 is fixed to the rear side. In the frame 12, a known optical head 19 for recording / reproducing on / from the optical disk 16, a seek motor 20 composed of a linear motor for seek driving the optical head 19, and a spindle motor for rotationally driving the optical disk 16 are known.
A chassis 23 in which a mechanical section 22 such as 21 is installed, and a loading mechanism section 24 for moving the disk cartridge 17 coming in and out from the opening / closing door 18 between an insertion position and a predetermined loading position are incorporated.

The chassis 23 is fixed to the frame 12 via a vibration-proof rubber 25. Further, on the upper part of the frame 12, a circuit board 27 on which various electric elements 26 such as an LSI for controlling the drive of the mechanism section 22 and the loading mechanism section 24 are mounted is installed. Among the electric elements 26, the element (heat generating element) 26H having a large heat generation amount such as the LSI is mounted on the upper surface. The upper surface side of the circuit board 27 is covered with an outer cover 15,
The upper surface of the heating element 26H faces or contacts the inside of 15. When making this contact, the heights of the heating elements 26H from the circuit board 27 should be the same,
Surface mount by lead forming.

The chassis 23, the circuit board 27, the exterior cover
15 is fixed to the frame 12 in a laminated form, and the frame is
The front panel 13 and the rear panel 14 are fixed to the 12 to form an airtight chamber as a whole, and in particular, the peripheral portions of the chassis 23 and the circuit board 27 are in a substantially sealed state with respect to the outside, and this device is incorporated. The air flow from the fan or the like in the previous computer is prevented from reaching the chassis 23 or the like in the device, preventing the intrusion of dust, and preventing the recording / reproducing operation due to the dust or the like from adversely affecting the service life of the device. Improves reliability.

FIG. 3 is an exploded perspective view of the second embodiment of the present invention,
4 is a sectional view of the second embodiment after assembly, FIG. 5 is a sectional view of the exterior cover taken along the line AA in FIG. 3, and FIG. 6 is a sectional view of the exterior cover taken along the line BB of FIG. Members corresponding to those described with reference to FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

The second embodiment differs from the first embodiment in that a plurality of recesses 28 are provided on the inner surface of the outer cover 15 in accordance with the heights of the heating elements 26H.
The heat generating element 26H is housed in the recess 28 of the outer cover 15 so as to be substantially in close contact with the heat generating element 26H, so that heat can be released from the heat generating element 26H to the outside, and the optical disk 16 and the optical head 19 can be internally provided.
It prevents the temperature from rising. The circuit board 27 is fixed to the frame 12 together with the exterior cover 15 with screws 30. As a material of the outer cover 15, it is preferable to use an aluminum material having a high thermal conductivity and being relatively inexpensive.

As described above, the material of the outer cover 15 is aluminum, the main material of the circuit board 27 is, for example, iron, and the coefficient of linear expansion of the outer cover 15 is made larger than that of the circuit board 27. As shown by the two-dot chain line in 6,
The outer cover 15 is likely to warp inward due to heating, and the adhesion between the heating element 26H and the outer frame 15 in the recess 28 is improved.

The outer cover 15 has a large number of through holes 15 as shown in the perspective view of FIG. 7 unless dust protection is taken into consideration.
The heat dissipation effect is enhanced by using a plate material formed with a or a steel-like body.

The heat radiated from the outer cover 15 is discharged to the outside of the computer by, for example, the blowing and cooling action of the cooling fan of the computer into which the device is incorporated, so that the device is efficiently cooled. .

FIGS. 8 and 9 are sectional views showing a configuration example in which a heat radiating sheet is interposed between the exterior cover and the elements shown in FIGS. 5 and 6, inside the recess 28 of the exterior cover 15 (first embodiment). Then, between the upper surface of the heat generating element 26H and the inner surface of the outer cover 15, a heat radiating sheet 35 made of, for example, silicon rubber having a relatively good thermal conductivity and having elasticity is provided. The outer cover 15 and the outer cover 15 are closely attached.

Due to the presence of the heat dissipation sheet 35, a heat generating element
It is possible to avoid the problem that 26H and the outer cover 15 are adhered to each other with an appropriate elastic force and the heat generating element 26H is damaged due to a load such as a concentrated stress, and the heat dissipation effect is improved.

FIG. 10 is a sectional view of the outer cover in the third embodiment of the present invention, and FIG. 10 is the outer cover in FIG.
15 is a view of a portion corresponding to a cross-sectional view taken along line BB of FIG.

In FIG. 10, a plurality of uneven grooves 41 are formed on the outer cover 40 in parallel from the front side to the rear side of the outer surface.
Is formed to increase the surface area of the exterior cover 40 to improve the cooling effect and improve the heat dissipation effect.

The outer cover 40 is preferably a die-cast product using a die, which facilitates the formation of concavities and convexities, and is preferably aluminum die-cast having a high thermal conductivity.

FIG. 11 is a sectional view showing a fixing structure of an outer cover and a circuit board in the fourth embodiment of the present invention, and FIG. 12 is an enlarged sectional view of an essential part of the fourth embodiment. The outer cover 15 and the circuit board are shown. Reference numeral 27 denotes a side end fixed to the frame 12 with a screw 30 as in the above embodiment, and at least one through hole 15a, 27a is provided in addition to the portion fixed to the frame 12. The nut member 45 is attached to the through hole 27a of the circuit board 27, the male screw 46 is screwed into the female screw portion of the nut member 45 through the through hole 15a of the outer cover 15, and the head of the male screw 46 is the through hole of the outer cover 15. The outer cover 15 and the circuit board 27 are tightly fixed to each other by being locked to the peripheral portion of 15a and being screwed until the nut member 45 is locked to the bottom surface of the circuit board 27.

In the fourth embodiment, both end portions of the circuit board 27 are fixed to the frame 12 with screws 30 as in FIG. 10, and the circuit board 27 is fixed to the circuit board 27 as shown by the chain double-dashed line in FIG. Even if there is a warp, the nut member 45 can be pulled up toward the outer cover 15 by the male screw 46, so that the warp is not corrected and the adhesion between the heating element 26H and the outer cover 15 is not impaired. .

FIG. 12 is an enlarged cross-sectional view of the threaded portion of the nut member and the male screw, and FIG. 13 is a plan view of the nut member 45.
On the upper portion of the nut member 45, a tapered collar portion 47 having a maximum diameter slightly larger than the hole diameter of the through hole 27a is formed so that the nut member 45 can be pressed into the through hole 27a of the circuit board 27 to be attached.
The nut member 45 is designed so as not to come off easily. In addition, a slit 48 is formed in the collar portion 47 to enable elastic deformation, so that the collar portion 47 can be easily pushed into the through hole 27a.

Further, the side surface of the collar portion 47 on which the slot 48 is formed is cut to have an oval shape in a plan view, and an annular foot portion 49 projecting below the through hole 15a of the exterior cover 15 is provided. By making the inside a slightly larger oval shape than the flange portion 47, the flange portion 47 and the inside of the annular foot portion 49 can be brought into contact with each other, and the nut member 45.
It is a detent.

FIG. 14 is a sectional view of an engaging member used in place of the nut member 45. This engaging member 50 is formed by resin molding and has a tap diameter of a tapping screw 51 used in place of the male screw 46. A through hole 52 having a small inner diameter and a flange portion 53 similar to the nut member 45 are formed.
, The engaging member 50 is attached by being pushed into the through hole 27a of the circuit board 27 by elastic deformation of the engaging member 50, and after being attached, the tapping screw 51 is inserted into the through hole 52. Therefore, even if the circuit board 27 having a warp is used, the warping can be corrected by pulling up the engaging member 50 in the direction of the outer cover 15 by the tapping screw 51, and the heating element 26H and the outer cover 15 can be separated from each other. Adhesion can be improved.

As described above, the outer cover 15 and the heating element
It is possible to improve the adhesiveness with the 26H and improve the heat dissipation to the outside of the heat generated in the heating element 26H.

FIG. 15 is a characteristic diagram of the temperature rise of the conventional general optical disk drive device and the same device adopting the structure of the above-mentioned embodiment according to the present invention. About 10 ℃, about 7 ℃ at the optical head
The difference in temperature was observed, and it was found that the apparatus embodying the present invention had a cooling effect.

In each of the above-described embodiments, the airflow by the cooling fan of the computer into which the device is incorporated is efficiently used to suppress the temperature rise in the device, but depending on the specifications, the airflow cannot be expected. is there. The fifth embodiment shown in FIG. 16 has a structure that can cope with the case where the air flow cannot be expected.

The fifth embodiment has the same configuration as that of the first embodiment except that the shape of the outer cover 55 and the suction fan 56 for cooling are provided. In FIG. 16, a small suction fan 56 is installed in the vicinity of the exterior cover 55 at the rear of the device, and a plurality of irregularities 57 for air circulation are provided so as to face the suction port of the suction fan 56.
Is formed on the outer surface of the exterior cover 55.

Therefore, since the air flow is generated along the irregularities 57 by the suction action of the suction fan 56, the outer cover 55 is cooled by this air flow, and the heat generated by the heating element 26H is transferred to the outer cover 55. It can be efficiently released to the outside via In this case, since the suction fan 56 only needs to generate the air flow on the exterior cover 55, the suction fan 56 may be a small type having a low air flow rate.

FIG. 17 is an exploded perspective view of a sixth embodiment of the present invention, and FIG. 18 is a cross-sectional view of the sixth embodiment after assembly. A sealing material 61 made of sponge or the like is extended to a plurality of fixing portions 12a for fixing the board 27, and a closed space 62 is formed by the lower surface of the fixed circuit board 27, the frame 12, the front panel 13, and the rear panel 14. Form the rear panel 14 of this enclosed space 62 part
Blower fan 63 is installed in.

By the blower fan 63, air is supplied from the outside.
(Indicated by an arrow I) is sent between the chassis 23, on which the mechanical unit 22 such as the optical head, the seek motor, and the spindle motor is installed, and the lower surface of the circuit board 27, and is sent to the front panel 13. It will flow out through the formed through-hole portion 64. Therefore, an air insulating layer is formed in the closed space 62 by the air flow, and the heat generated in the heat generating element 26H can be suppressed from being transferred to the mechanism portion 22.

FIG. 19 is a sectional view showing an essential part of the seventh embodiment of the present invention. The difference between the seventh embodiment and the sixth embodiment is that the front panel 13 is formed with a through hole 64. No
A configuration in which the front panel 13 side of the closed space 62 is communicated with the upper surface of the circuit board 27, and moreover, a plurality of through holes 65 are formed in the exterior cover 15, and an air circulation space 66 from the blower fan 63 to the through hole 65 is formed. Is.

Therefore, the air blown out by the blower fan 63 becomes an air heat insulating layer as in the sixth embodiment, and the front panel 13 guides the air to the upper surface of the circuit board 27. It is mounted on 27 and serves to cool the heating element 26H.

FIG. 20 is a sectional view showing an essential part of the eighth embodiment of the present invention. The difference between the eighth embodiment and the seventh embodiment is that the through hole 65 is not formed in the outer cover 15. , The air outlet 70 is formed in the rear panel 14, and the blower fan
The air intake 71 by 63 is installed on the same surface of the rear panel 14 as the air intake 71.

According to the eighth embodiment, even when the space for air circulation cannot be provided above the outer cover 15, the rear panel
The 14 is generally provided with a connector or the like for interfacing with the computer to which it is installed, and thus a space for air circulation can be relatively easily obtained, which is advantageous in design.

Instead of the blower fan 63 that takes in air into the air circulation space 66, as shown in FIG. 21, a fan 75 of the type that expels the air in the air circulation space 66 to the outside may be used.

FIG. 22 is an exploded perspective view of essential parts in the ninth embodiment of the present invention, and FIG. 23 is a sectional view of the ninth embodiment after assembly. In the ninth embodiment, the air circulation space 66 is shown. A portion is divided into an air circulation portion 66a and a non-circulation portion 66b by a sealing material 80, and the non-circulation portion 66b through which the external air does not flow supplies power to the circuit board 27 and the mechanism portion 22 and transmits / receives signals. A connecting body 81 for interfacing with the above is provided, and dust from the outside is prevented from entering the mechanism portion 22 without providing a filter for air cleaning.

Specifically, the upper and lower surfaces of the circuit board 27 are divided into a central portion and both side portions by a sealing material 80 made of sponge or the like, and the central portion is the flow portion 66a and both side portions are the non-flow portion. 66b, the circuit board 27 is placed on the partition frame 82 fixed on the chassis 23 on which the mechanism section 22 is installed. A fan on the rear side of the central portion of the circuit board 27
The sealant 80 is not provided in the portion 66c corresponding to the installation portion of 75 to provide an air passage. The contact portion of the sealing material 80 on the partition frame 82 in FIG. 22 is shown by a two-dot chain line.

Further, the cutout portion 8 is provided at a portion of the one side portion of the partition frame body 82 corresponding to the non-circulation portion 66b of the circuit board 27.
2a is formed, and the connecting body 81 is inserted therethrough.

The partition frame body 82 and the chassis 23 on which the mechanism portion 22 is installed are integrally formed as shown in FIG. 24, and the connecting body 81 is inserted into the upper portion of the integrated chassis 85. It is also conceivable to form the cutout portion 85a.

Further, as shown in FIG. 25, a heating element 26H is provided in the circuit board 27 with a gap (from the general specifications of the driving device).
0.5 to 2 mm is desirable) C is formed and mounted (surface mounting)
It is also conceivable to change the shape of the lead 26H _F of the heating element 26H so that it can be achieved. By forming the gap C between the circuit board 27 and the heat generating element 26H, the cooling air flow I also contacts the lower surface of the heat generating element 26H to enhance the cooling effect.

FIG. 26 is a block diagram showing the structure of the control section of the mechanical section 22 in the tenth embodiment of the present invention, and 90 is a temperature sensor which is a temperature detecting means for detecting the temperature in the apparatus, A detection signal from the temperature sensor 90 is converted into a digital signal by an A / D (analog / digital) signal converter 91 and sent to the CPU 92, and the CPU 92 determines the current internal temperature of the device based on the signal, and the clock setting unit 93 Change the setting value. The signal processing unit 94 switches the frequency of the reference operation clock according to this set value, and the operation speed of the driving device (mechanism unit 22) is set to three levels, for example, 1x speed, 2x speed, and 4x speed
Switch to any of (not limited to these three steps).

Normally, even a 2x speed or 4x speed CD-ROM drive is equipped with an audio reproducing function.
Data can be played back even at double speed. This is realized by changing the operation clock input to each LSI by the CPU (frequency division by 4 or frequency division by 2).

FIG. 27 is a flow chart for switching the operating speed of the tenth embodiment. For example, when the mechanical section 22 is operating at quadruple speed, the temperature is detected by the temperature sensor 90.
(S1-1), if the CPU 92 determines that the temperature inside the apparatus exceeds the specified value a preset and the temperature is high (S1-2)
YES), the CPU 92 changes the setting value of the clock setting unit 93 (S1-3) and sets the operating speed of the mechanical unit 22 to double speed or 1 speed.
The speed is reduced to double speed (the amount of heat generated by the heating element increases as the double speed number increases). Therefore, due to the decrease in the operating speed of the mechanism unit 22, without stopping the operation of the mechanism unit 22,
The rise in temperature inside the device can be suppressed.

The prescribed value a is set to be slightly lower than the upper limit value of the internal temperature of the device which ensures the reliability of reading and writing of data.

FIG. 28 is a block diagram showing the configuration of the control unit of the fan 63 (75) in the eleventh embodiment of the present invention. The detection signal of the temperature sensor 90 is a digital signal by the A / D signal converter 91. The converted temperature is sent to the CPU 92, and the CPU 92 determines the current temperature inside the apparatus by the signal. CPU
The current control circuit 96 controls the amount of current supplied to the blower fan 63 via the D / A signal converter 95, thereby changing the blown amount of the blower fan 63.

In the CPU 92, the operating speed of the mechanism unit 22 (the heat generation increases as the clock frequency input to the LSI increases) or the operating state of the mechanism unit 22 (eg, heat generation increases in the order of standby, reproduction, and recording). Is set), the amount of air blown by the blower fan 63 is set. CPU92
In each operating state, it is constantly determined whether or not the temperature inside the device exceeds the specified value a.

The prescribed value a is not in one step, but in several steps,
The current control circuit 96 may change the amount of current supplied to the blower fan 63 at each specified value to set the blown air amount of the blower fan 63 in several stages. By doing so, the fan is driven according to the operating speed or operating state, and the current consumption can be reduced.

FIG. 29 is a flow chart of the air volume control corresponding to the operating state. Following the flow shown in FIG. 27, the CPU
At 92, it is determined whether the apparatus is in the standby mode, the recording mode, or the reproduction mode (S2-1), and the air blowing amount by the air blowing fan 63 is changed according to each mode (S2-).
2). Even after that, the CPU 92 monitors the internal temperature of the device and displays the specified value.
When it exceeds a (YES in S2-3), the D / A signal converter 95 and the current control circuit 96 are controlled so as to increase the blown air volume to increase the amount of current supplied to the blower fan 63 (S2). -
Four). This operation is monitored by the CPU 92 until the mode is switched (S2-5).

FIG. 30 is a flow chart of the air volume control corresponding to the operating speed. Following the flow shown in FIG. 27, the CPU
At 92, it is determined whether the device is at 4x speed, 2x speed, or 1x speed (S3-1), and the amount of air blown by the blowing fan 63 is changed as described above according to each operating speed (S3-2). ). CP
The U92 constantly monitors the temperature inside the apparatus, and when it exceeds the specified value a (YES in S3-3), increases the amount of current supplied to the blower fan 63 to increase the amount of blown air (S3-4). This operation is monitored by the CPU 92 until the operation speed is switched (S3-5).

The operating speed may be increased if the temperature inside the apparatus is sufficiently lowered.

FIG. 31 is a diagram showing the relationship between the air flow rate (fan consumption current) and the operating state and operating speed. Even if the operating state and operating speed are the same as shown in FIG. Vary air volume (range of vertical solid line).

FIG. 32 is a block diagram showing the structure of a fan control unit according to the twelfth embodiment of the present invention. The difference between the twelfth embodiment and the eleventh embodiment is that the temperature inside the apparatus is detected. In addition to the sensor 90, an external temperature sensor 98 for detecting the temperature outside the apparatus and an A / D signal converter 99 provided between the external temperature sensor 98 and the CPU 92 are provided.

FIG. 33 is a flow chart of the air volume control of the twelfth embodiment, in which the temperature X in the apparatus is detected by the temperature sensor 90.
(S4-1), the external temperature sensor 98 detects the external temperature of the device.
(S4-2). In the CPU 92, based on a predetermined specified value a of the internal temperature of the device and a specified value b of the external temperature of the device,
When the internal temperature X exceeds the specified value a (YES in S4-3),
As described above, the amount of current supplied to the blower fan 63 is increased to increase the amount of blown air (S4-4). When the external temperature Y exceeds the specified value b (YES in S4-5), the amount of current supplied to the blower fan 63 is increased so as to further increase the amount of blown air (S4-6).

As in the twelfth embodiment, the amount of current supplied to the blower fan 63 is changed according to the temperature inside and outside the device, so that when the temperature outside the device (air cooling air temperature) is high, Since the air-cooling effect will be reduced, the air flow rate is controlled to increase at this time. Further, when the temperature outside the device is low, the amount of current to the blower fan 63 can be reduced so as to reduce the amount of blown air, and power consumption can be reduced.

FIG. 34 is a sectional view showing the main part of the thirteenth embodiment of the present invention. In this thirteenth embodiment, a first circuit board 27a extending parallel to the upper surface of the chassis 23, The first circuit board 27a is electrically connected to the first circuit board 27a by the connector 100, and the second circuit board 27b is installed vertically so as to face the air outlet of the blower fan 63 to form a circuit board.

Blower fan 6 on the second circuit board 27b
Heat generating elements 26H are collectively mounted in the mounting state described with reference to FIG. 25 on the surface of the air outlet side of 3, and the element 26 having a relatively small heat generation amount is mounted on the first circuit board 27a. . As described above, by disposing the heating element 26H in the vicinity of the air outlet of the blower fan 63, it becomes possible to intensively cool the outside air, and the air cooling effect can be enhanced.

Even if the second circuit board 27b is not vertical, an air guide member or the like may be provided so that the air outlet of the blower fan 63 can be brought closer to the heat generating element 26H. To be enhanced.

In the above embodiment, the so-called caddy is used.
Although the description has been given by taking the (disk cartridge 17) type optical disk drive device as an example, the heat dissipation and cooling effects are improved by adopting the same configuration for a tray type optical disk drive device or a magneto-optical disk drive device that does not require a caddy. Can be achieved.

It is also conceivable to combine the structures in the respective embodiments as appropriate.

[0097]

As described above, according to the structure of the first aspect of the present invention, the recording disk drive device has the dust-proof effect because the mechanism part of the device, the circuit board and the like are covered by the outer frame. In addition, the heat generating elements are collectively mounted on one side surface of the circuit board on the side of the outer frame, and the mechanism portion is arranged on the other side of the circuit board. The temperature rise of the mechanism part can be suppressed, and the temperature rise of the recording disk and the optical head and the adhesion of dust can be prevented, and the recording and reproducing characteristics can be prevented. It is possible to prevent deterioration and shortening of component life.

According to the second aspect of the present invention, by bringing the heating element into contact with the exterior frame body, heat can be more efficiently released to the outside through the exterior frame body.

According to the third aspect of the present invention, the mechanism portion of the device, the circuit board and the like are covered by the outer frame, so that the dustproof effect is excellent, and the heating element is substantially in close contact with the recess of the outer frame. Since it is stored, heat is efficiently released from the outer frame to the outside, the temperature rise inside the device is suppressed, and the temperature rise of the recording disk or optical head and the adhesion of dust are prevented. It is possible to prevent deterioration of reproduction characteristics and shortening of component life.

According to the structure of claim 4, since the element and the exterior frame are brought into close contact with each other through the elastic heat-dissipating sheet, it is possible to improve the degree of close contact and improve the heat dissipation. Even if the degree is increased, a large load is not applied to the element due to the elasticity of the heat dissipation sheet, and it is possible to prevent the occurrence of defects such as damage or short circuit of the element.

According to the fifth aspect of the present invention, the heat dissipation and cooling effects can be enhanced by providing the outer frame with the irregularities to increase the surface area.

According to the sixth and seventh aspects of the invention, the nut member and the screw or the engaging member and the tapping screw can be used to pull up the circuit board with respect to the outer frame body so as to bring them into close contact with each other. Since it is possible to correct the warp of the circuit board and increase the degree of adhesion between the exterior frame and the element, the heat dissipation effect is improved.

According to the structure of claim 8, when heat is applied to the circuit board and the outer frame, the degree of expansion and deformation of the two differ, which is utilized to determine the degree of adhesion between the outer frame and the element. Since it can be increased, the heat dissipation effect is improved.

According to the ninth aspect of the invention, the cooling air can be made to flow through the irregularities on the outer side of the outer frame by the suction fan, so that the cooling and heat radiation effects in the outer frame can be enhanced.

According to the structure described in claim 10, the air insulating layer can be formed by forming the closed space between the circuit board and the mechanical portion, and the cooling air is flown in the closed space. In addition to the effect obtained by the configuration of the item 1, the heat cutoff to the mechanical section is more effectively performed.

According to the structure of claim 11, the cooling air can be circulated to both sides of the circuit board in the air circulation space, and in addition to the effect of the structure of claim 10, the cooling of the heating element is effective. To be done.

According to the twelfth aspect of the invention, the cooling air passes through the gap between the circuit board and the heating element in the air circulation space, so that heat is radiated well from the entire heating element.

According to the thirteenth aspect, the air intake port and the air outlet port of the fan for generating the cooling air can be installed at portions that do not affect other components.

According to the structure described in claims 14 and 15, the non-circulation portion of air is provided in the air circulation space portion, and the connection body of the circuit board and the mechanical portion is arranged in the non-circulation portion. It is possible to prevent dust in the outside air from entering the mechanical section.

According to the sixteenth aspect of the present invention, the operating speed of the mechanism section is changed according to the temperature inside the device, so that when the temperature inside the device becomes high, the operating speed is reduced to suppress heat generation and the operation is performed. The temperature inside the device can be lowered without stopping.

According to the seventeenth and eighteenth aspects, the cooling air amount by the fan is changed according to the different heat generation amount due to the difference in operating speed or operating state.
Cooling can be performed according to the situation, and the power consumption of the fan can be reduced.

According to the structure of claim 19, the cooling effect is different depending on the temperature of the air taken in from the outside. Therefore, by changing the amount of cooling air depending on the temperature inside the apparatus and the temperature of the outside air, it is possible to further improve the cooling effect. Cooling becomes possible and the power consumption of the fan can be reduced.

According to the twentieth aspect of the invention, the cooling of the heating element by the fan is effectively performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of a recording disk drive device of the present invention.

FIG. 2 is a sectional view of the first embodiment of the present invention after assembling.

FIG. 3 is an exploded perspective view of a second embodiment of the present invention.

FIG. 4 is a sectional view of a second embodiment of the present invention.

5 is a cross-sectional view of the exterior cover taken along the line AA in FIG.

6 is a cross-sectional view taken along line BB of the exterior cover in FIG.

FIG. 7 is a perspective view showing another example of the exterior cover.

8 is a cross-sectional view of an example in which a heat dissipation sheet is interposed in FIG.

9 is a cross-sectional view of an example in which a heat dissipation sheet is interposed in FIG.

FIG. 10 is a sectional view of an outer cover according to a third embodiment of the present invention.

FIG. 11 is a sectional view showing a fixing structure of an outer cover and a circuit board according to a fourth embodiment of the present invention.

FIG. 12 is an enlarged sectional view of a threaded portion of a nut member and a male screw of a fourth embodiment of the present invention.

13 is a plan view of the nut member of FIG.

FIG. 14 is a sectional view of an engaging member.

FIG. 15 is a characteristic diagram of temperature rise in the conventional example and the optical disk drive device according to the present invention.

FIG. 16 is a perspective view of a fifth embodiment of the present invention.

FIG. 17 is an exploded perspective view of essential parts in a sixth embodiment of the present invention.

FIG. 18 is a sectional view of a sixth embodiment of the present invention after assembling.

FIG. 19 is a sectional view of an essential part in a seventh embodiment of the present invention.

FIG. 20 is a sectional view of an essential part in an eighth embodiment of the present invention.

FIG. 21 is a sectional view showing a usage example of another fan in the eighth embodiment of the present invention.

FIG. 22 is an exploded perspective view of the essential parts of the ninth embodiment of the present invention.

FIG. 23 is a sectional view of a ninth embodiment of the present invention after assembling.

FIG. 24 is a perspective view showing an integrated chassis.

FIG. 25 is an explanatory diagram showing an example of mounting a heating element on a circuit board.

FIG. 26 is a block diagram showing a configuration of a control section of a mechanical section in a tenth embodiment of the present invention.

FIG. 27 is a flowchart of operating speed switching according to the tenth embodiment of the present invention.

FIG. 28 is a block diagram showing the structure of a fan controller according to an eleventh embodiment of the present invention.

FIG. 29 is a flowchart of air volume control corresponding to the operating state in the eleventh embodiment of the present invention.

FIG. 30 is a flowchart of air volume control corresponding to the operation speed in the eleventh embodiment of the present invention.

FIG. 31 is a diagram showing a relationship between an air blowing amount, an operating state, and an operating speed.

FIG. 32 is a block diagram showing the configuration of a fan controller according to a twelfth embodiment of the present invention.

FIG. 33 is a flowchart of air volume control according to the twelfth embodiment of the present invention.

FIG. 34 is a sectional view of an essential part in a thirteenth embodiment of the present invention.

FIG. 35 is a schematic configuration diagram of a conventional optical disc drive device.

[Explanation of symbols]

11 ... Exterior frame body, 12 ... Frame, 13 ... Front panel, 14 ... Rear panel, 15, 40, 55 ... Exterior cover, 16
… Optical disc, 19… Optical head, 20… Seek motor,
21 ... Spindle motor, 22 ... Mechanism part, 23 ... Chassis, 24 ... Loading mechanism part, 26 ... Element, 26H ...
Heating elements, 26H _F ... lead, 27, 27a, 27b ... circuit board, 28 ... recess, 35 ... heat radiating sheet, 41 ... uneven groove,
45 ... Nut member, 46 ... Male screw, 50 ... Engaging member, 51
… Tapping screw, 56… Suction fan, 57… Air flow unevenness, 61, 80… Sealant, 62… Sealed space, 63…
Blower fan, 66 ... Air distribution space, 66a ... Distribution section, 6
6b ... Non-circulation section, 70 ... Air outlet, 71 ... Air intake, 81 ... Coupled body, 85 ... Integrated chassis, 90 ... Temperature sensor, 92 ... CPU, 93 ... Clock setting section, 94
… Signal processing unit, 96… Current control circuit, 98… External temperature sensor, 100… Connector.

Claims (20)

[Claims] 1. An optical head for recording / reproducing data on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. A recording disk drive device comprising a circuit board, wherein the mechanism section and the circuit board are covered with an outer frame in a substantially sealed state, wherein a heat generating element is mounted on one side surface of the circuit board, and A recording disk drive device, wherein the mechanism portion is disposed on a side surface side, and the exterior frame body portion that covers the circuit board and the element that generates heat are oppositely provided. 2. A plurality of the heat-generating elements are mounted on the circuit board so that the side surfaces of the outer frame portion covering the circuit board have substantially the same height, and generate heat with the outer frame portion. 2. The recording disk drive device according to claim 1, wherein the device is brought into contact with the device. 3. An optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. A recording disk drive device comprising a circuit board, wherein the mechanism section and the circuit board are covered in a substantially sealed state by an outer frame, and a heat generating element is mounted on one side surface of the circuit board to cover the circuit board. It is characterized in that a recess is formed on the surface of the exterior frame facing the heat-generating element so as to match the height of the heat-generating element, and the heat-generating element can be housed so as to be substantially in close contact with the recess. Recording disk drive. 4. The recording disk drive device according to claim 1, wherein the heat generating element is brought into close contact with the exterior frame body via an elastic heat dissipation sheet. 5. The recording disk drive device according to claim 1, wherein irregularities are formed on an outer side of an outer frame portion that covers the circuit board. 6. A through hole is formed in the circuit board, a nut member is attached to the through hole, a screw is screwed into the nut member from the outside of an exterior frame body portion covering the circuit board, and the circuit is formed by the screw. 6. The recording disk drive device according to claim 1, wherein the circuit board and the outer frame body are closely fixed to each other so that the board can be pulled up. 7. A through hole is formed in the circuit board, an engaging member is attached to the through hole, and a tapping screw is screwed into the engaging member from the outside of an exterior frame body covering the circuit board,
6. The recording disk drive device according to claim 1, wherein the circuit board can be pulled up with a tapping screw, and the circuit board and the outer frame body are fixed in close contact with each other. 8. The circuit board and an exterior frame body covering the circuit board are made of materials having different linear expansion coefficients and fixed to a predetermined exterior frame body. The recording disk drive device according to claim 1. 9. A suction fan is provided at the rear of the main body of the apparatus, and an unevenness for air circulation is formed on the outside of an exterior frame body that covers the circuit board, in the direction of the suction port of the suction fan. 9. The recording disk drive device according to any one of 1 to 8. 10. An optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. A recording disk drive device comprising a circuit board, wherein the mechanism section and the circuit board are covered with an outer frame in a substantially sealed state, wherein a heat generating element is mounted on one side surface of the circuit board, and The mechanism portion is arranged on the side surface side, the heat generating element is arranged on the side of the exterior frame body portion that covers the circuit board, and the circuit board is attached to the exterior frame body via a sealing material to form the circuit board and the mechanism. A recording disk drive device, wherein a closed space is formed between the closed space and a fan, and a fan for generating cooling air is provided in the closed space. 11. An optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. A recording disk drive device comprising a circuit board, wherein the mechanism section and the circuit board are covered with an outer frame in a substantially sealed state, wherein a heat generating element is mounted on one side surface of the circuit board, and The mechanism portion is arranged on the side surface side, the heat generating element is arranged on the side of the exterior frame body portion that covers the circuit board, and the circuit board is attached to the exterior frame body via a sealing material to form the circuit board and the mechanism. And a fan for generating cooling air is provided in the air circulation space, and the cooling air is further supplied from the air circulation space to one side of the circuit board on which the heat generating element is mounted. A recording disk drive device comprising a portion for guiding a disk. 12. The recording disk drive device according to claim 11, wherein the heat generating element is mounted on the side portion of the circuit board with a gap provided therebetween. 13. The recording disk drive device according to claim 11, wherein the air intake port and the air outlet port for the fan are provided on substantially the same surface of the rear portion of the exterior frame body. 14. A partitioning frame that divides the air circulation space into a circulation section and a non-circulation section for cooling air, and a coupling body for interfacing the circuit board and the mechanism section to the non-circulation section. 12. The recording disk drive device according to claim 11, wherein the recording disk drive device is provided. 15. The recording disk drive device according to claim 14, wherein the partition frame body is formed integrally with a frame body that covers the mechanism portion. 16. An optical head for recording / reproducing on / from a recording disk, a mechanism unit for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism unit. In a recording disk drive device including a circuit board, a temperature detection means for detecting a temperature inside the device, a drive means for driving the mechanism section at any one of at least two different operation speeds, and the temperature detection means. A recording disk drive device, comprising: a control unit that selectively sets the operating speed according to the detected temperature. 17. An optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. In a recording disk drive device including a circuit board and a fan that generates cooling air in the device, a drive unit that drives the mechanism unit at any one of at least two different operating speeds, and a drive unit according to the operating speed. A recording disk drive device, comprising: a rotation speed control means for changing the rotation speed of the fan. 18. An optical head for recording / reproducing data on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. In a recording disk drive device including a circuit board and a fan for generating cooling air in the device, a rotation speed control for changing the rotation speed of the fan according to a difference in operating states such as recording, reproduction, and standby. A recording disk drive device comprising means. 19. An optical head for recording / reproducing on / from a recording disk, a mechanism section for driving each component of the optical head and the recording disk, and various elements for controlling the drive of the mechanism section. In a recording disk drive device including a circuit board and a fan for generating cooling air inside the device, a first temperature detecting means for detecting a temperature inside the device and a second temperature for detecting a temperature outside the device. A recording disk drive device comprising: a detection means and a rotation speed control means for changing the rotation speed of the fan based on the detection results of the both temperature detection means. 20. The recording disk drive device according to claim 10, wherein the heat generating element is mounted on the circuit board near a fan for generating cooling air.