JP2000269673A - Electronics - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To suppress a rise in temperature of a main body side space in which a drive unit is disposed and to improve cooling efficiency. SOLUTION: A main body side space 3 in which driving units 8, 9 are arranged.
And predetermined heat generating units 12, 12, which generate heat when the driving unit is driven.
, 13 are formed in the outer casing 2 to partition the main body side space from the layout space.
1 was provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to electronic equipment.
More specifically, the present invention relates to a technique for suppressing a rise in temperature of a main body side space in which a driving unit is disposed and improving cooling efficiency.

[0002]

2. Description of the Related Art In an electronic apparatus, for example, an optical disk reproducing apparatus, a driving section such as an optical pickup and a heating section such as a power transistor and a regulator which generate heat when the driving section is driven are arranged in an outer casing. I have.

Generally, in such an optical disk reproducing apparatus, a temperature rise in the outer casing due to heat generated from a power transistor, a regulator, or the like, which is a heat source, is suppressed to ensure a proper operation state of a drive unit. There is a need. In particular, since the optical pickup, which is an optical component, is easily affected by heat, it is necessary to efficiently suppress a temperature rise in the outer casing.

In order to suppress the temperature rise in the outer casing in the conventional optical disc reproducing apparatus, the outer casing is formed with an intake port for taking in external air and an exhaust port for discharging the taken-in air to the outside. This is performed by causing the external low-temperature air taken in from the holes to flow by a fan provided in the outer casing and discharging the high-temperature air from the exhaust holes.

[0005]

However, in the above-mentioned conventional optical disk reproducing apparatus, both the driving section such as an optical pickup and the heating section such as a power transistor and a regulator are arranged in the same space in an outer casing. Therefore, there is a problem that air which is taken in from the outside through the air intake hole and has become high temperature due to the heat generated by the heat generating portion easily affects the driving portion when flowing in the outer casing, resulting in poor cooling efficiency.

In addition, dust enters the outer casing together with air taken in from the outside, and the optical pickup is likely to malfunction. In addition, when the invading dust contains moisture, it may cause a short circuit between the fine pitch patterns of the electronic component.

[0007] Further, when an intake port or an exhaust port is formed on the operation section side where various operation switches for operating the optical disc reproducing apparatus are arranged, the noise generated by the rotation of the fan becomes noise and the operator generates noise. Can also cause problems such as discomfort.

[0008] Therefore, it is an object of the present invention to overcome the above-mentioned problems, to suppress a rise in the temperature of the main body side space in which the drive unit is disposed, and to improve the cooling efficiency.

[0009]

In order to solve the above-mentioned problems, an electronic apparatus according to the present invention has an arrangement in which a main body side space in which a driving unit is arranged and a predetermined heating unit which generates heat when the driving unit is driven are arranged. The space is formed in the outer casing, and a partition plate is provided to separate the space on the main body side from the space for disposition.

Therefore, in the electronic device of the present invention, the main body side space and the arrangement space are blocked by the partition plate, and no air flows between the main body side space and the arrangement space.

[0011]

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

In the embodiment described below, the present invention is applied to a vehicle-mounted audio apparatus. This audio apparatus is a so-called mini-optical disk which is housed in a disk cartridge and has a diameter of about 64 mm. Recording and reproduction of a signal on a disk (MD) and a diameter of about 120
This is an optical disk device capable of reproducing signals recorded on a compact disk (CD) having a diameter of 0.2 mm.

In the outer casing 2 of the optical disc apparatus 1, a main body side space 3 in which a predetermined driving unit is disposed and an arrangement space 4 in which a predetermined heat generating unit is disposed are formed. Is provided with an operation unit 5 (see FIG. 1). The outer housing 2 includes a main body-side housing 6 opened rearward and the main body-side housing 6.
Radiating member 7 attached so as to close the opening of
Consisting of

The main body side space 3 is an MD unit 3a located on the upper side.
And the CD section 3b located below,
A first drive unit 8 having an optical pickup for driving the MD is disposed in the unit 3a, and a CD unit 3b is provided with a CD.
Drive unit 9 having optical pickup for driving
Is arranged. The optical disk device 1 is a device with a radio, and a radio drive unit is also arranged in the CD unit 3b.

An operation unit 5 is arranged on the front surface of the main body side housing 6. The operation unit 5 includes an operation panel 5a and various operation switches 5b provided on the operation panel 5a for driving an MD, a CD, and a radio. , 5b,... And
The operation panel 5a is rotatably and movably supported by the main body side housing 6. The upper end of the operation panel 5a descends along the front surface of the main body side housing 6, and the lower end of the operation panel 5a moves forward. The MD insertion opening and the CD insertion opening (not shown) formed on the front surface of the main body side housing 6 are opened by being moved so as to protrude from the main body side housing 6.

Partition plates 10 and 11 made of a metal material are attached to the rear end of the main body-side housing 6.
The main body side space 3 and the arrangement space 4 are separated by 0 and 11 (see FIGS. 2 and 3). Then, the partition plate 10 is arranged at the rear end of the MD section 3a (see FIG. 2), and the partition plate 1
Reference numeral 1 is arranged at the rear end of the CD section 3b (see FIG. 3).

The partition plates 10 and 11 have substantially the same shape. A substantially central portion 10a, 11a in the left-right direction is formed in a concave shape having a horizontal cross section and opening rearward, and left portions 10b, 11b and The right portions 10c and 11c are formed in a planar shape (see FIGS. 2 and 3). The right side parts 10c and 11c are located slightly forward of the left side parts 10b and 11b.

The partition plates 10 and 11 have their left side portions 10b,
11b is attached to the main body-side housing 6 so as to be located at the rear edge of the main body-side housing 6. Therefore, the rear ends of the MD section 3a and the CD section 3b have central portions 1 of the partition plates 10 and 11, respectively.
Central side arrangement portions 2a and 2a are formed corresponding to 0a and 11a, and right side arrangement portions 2b and 2b are formed corresponding to right side portions 10c and 11c. The partition plate 10 is provided with a mounting hole 10d for mounting the heat radiation member 7 (see FIG. 4).

The regulators 12, 12,... Are arranged on the right side arrangement section 2b formed on the MD section 3a so as to be separated from each other left and right (see FIGS. 2, 4 and 6), and formed on the CD section 3b. The power transistor 1
3 and 4 (see FIGS. 3, 4 and 6), these regulators 12, 12,... And the power transistor 13 generate heat when the first driving unit 8 and the second driving unit 9 are driven. This is the heat generating part. The optical disk apparatus 1 has components that are heat sources in addition to the regulators 12, 12,... And the power transistor 13. Among them, the regulators 12, 12,. These components generate the largest amount of heat when the first drive unit 8 and the second drive unit 9 are driven.

The regulators 12, 12,...
The mounting plate 14 is mounted, and mounting pieces 14a, 14a are formed on both right and left ends of the mounting plate 14 (see FIG. 4). At the upper end of the mounting plate 14, fitting portions 14b, 14b,... Bent forward of the regulators 12, 12,.

A second mounting plate 15 is mounted on the power transistor 13, and mounting pieces 15 a, 15 a bent toward the front of the power transistor 13 are formed on both left and right ends of the mounting plate 15 (see FIG. 2). (See FIG. 4).

At the rear end of the main body-side casing 6, mounting pieces 6a, 6a,... Are formed by bending the rear edge at right angles, and the mounting pieces 6a, 6a,. Are formed (see FIG. 4).

The heat dissipating member 7 is formed by, for example, aluminum die casting, and is attached to the main body side housing 6 and the partition plate 10 so as to cover the partition plates 10 and 11 from behind (FIGS. 1 and 2). , FIG. 3, FIG. 5, and FIG. 6). An arrangement space 4 is formed between the partition plates 10 and 11 and the heat radiation member 7, and the arrangement space 4 is formed between the partition plate 10 and the heat radiation member 7.
And a second portion 4b formed between the partition plate 11 and the heat radiating member 7 (see FIGS. 2 and 3).

The heat dissipating member 7 includes a main portion 16 having a substantially rectangular shape that is horizontally long, a first protruding portion 17 protruding downward from a right end of the main portion 16, and a lower portion from a position near the left end of the main portion 16. And a second protruding portion 18 protruding from the main body (see FIGS. 5 to 9).

Exhaust holes 16a, 16a,... Extending substantially in the circumferential direction are formed at the left end of the main portion 16. A first heat radiating portion 16b is formed at a portion on the right side of the portion where the exhaust holes 16a, 16a of the main portion 16 are formed, and the first heat radiating portion 16b is a horizontally long substantially projecting portion slightly projected forward. It is formed in a rectangular shape (see FIG. 8). Further, the first heat radiating portion 16b is separated left and right from the fitting concave portions 16c, 16c,
Are formed.

The second protruding portion 18 is formed to be thick except for the upper end, and the second heat radiating portion 18a is formed here. On the inner surface of the heat radiating portion 18a, fitting concave portions 18b, 18b are formed so as to be separated from each other left and right. In addition, at the upper end of the second protruding portion 18, the intake holes 18c, 18c,.
Are formed (see FIGS. 6, 8 and 9).

A peripheral wall 19 is formed on the inner surface of the heat radiating member 7 and protrudes forward across the main portion 16 and the second projecting portion 18. The peripheral wall 19 defines the second projecting portion 18. A flow path 20 extending from the upper end to the right end of the main part 16 is formed (see FIGS. 6 and 8).

The heat radiation member 7 has first mounting holes 7a, 7a and second mounting holes 7b, 7b.
a, 7a are formed at positions corresponding to the mounting pieces 14a, 14a of the first mounting plate 14, and the second mounting holes 7b, 7b are formed at positions corresponding to the mounting pieces 15a, 15a of the second mounting plate 15. (See FIGS. 7 and 8).

The radiating member 7 has third mounting holes 7c, 7c,
Are formed, and the third mounting holes 7c, 7c,.
Are the mounting holes 6b, 6b,...
0 is formed at a position corresponding to the mounting hole 10d (see FIGS. 7 and 8). In the inner surface of the heat radiating member 7, the third mounting holes 7c, 7c,.
Are formed so as to protrude forward (see FIG. 8).

The exhaust holes 16a, 16 on the inner side of the heat radiating member 7
A fan 22 is rotatably arranged at a position corresponding to a,.

Thus, the heat radiating member 7 is provided in the third mounting hole 7.
, 7c,..., the main body side housing 6 and the partition plate 10
It is attached by screwing. When the heat radiating member 7 is attached in this manner, the distal end surfaces of the attaching protrusions 21, 21,.
a, 6a,... and the partition plate 10.

The heat radiation member 7 has first mounting holes 7a,
7a and the first mounting plate 1 via the mounting pieces 14a, 14a.
4 and the second mounting hole 7
The second mounting plate 15 is connected to the second mounting plate 15 by screws via b and 7b and the mounting pieces 15a and 15a. Therefore, in the state where the heat radiating member 7 is attached in this manner, the fitting portions 14b, 14b,... Of the first mounting plate 14 are fitted inside the fitting recesses 16c, 16c,. 1
2 is in contact with or close to the inner surface of the first heat radiating portion 16b of the heat radiating member 7, and the fitting pieces 15a, 15a of the second mounting plate 15 are fitted in the fitting concave portions 18b, 18b,
The power transistor 13 is the second heat radiating portion 1 of the heat radiating member 7.
8a is brought into contact with or close to the inner surface of 8a.

When the first drive unit 8 or the second drive unit 9 of the optical disk drive 1 is driven, the regulators 12, 12,
... and the power transistor 13 generates heat. At this time, the heat generated from the regulators 12, 12,... Or the power transistor 13 is radiated from the first heat radiating portion 16b or the second heat radiating portion 18a of the heat radiating member 7. At this time, since the main body side space 3 and the arrangement space 4 are partitioned by the partition plates 10 and 11, the regulator 1
, And even if the power transistor 13 generates heat, the temperature of the main body side space 3 hardly rises, and the first driving unit 8
In addition, good operation of the second drive unit 9 can be ensured.

Since the heat radiating member 7 is attached to the main body-side casing 6 and the partition plate 10 with the mounting projections 21, 21,. 7, the contact area between the body 7 and the main body 6 and the partition plate 10 is extremely small.
It is difficult to conduct heat to 0. Therefore, the temperature rise in the main body side space 3 can be further suppressed.

When the first driving section 8 or the second driving section 9 is driven, the amount of heat generated from the power transistor 13 is the largest. However, when the power transistor 13 generates heat, the flow path 20 formed thereabove is formed. An air flow occurs in the air.

That is, when the power transistor 13 generates heat, external low-temperature air flows into the flow path 20 of the arrangement space 4 from the intake holes 18c, 18c,. The exhaust holes 16a, 16
a flow out of the device (see FIG. 6).

Therefore, the heat generated from the power transistor 13 is radiated to the outside through the second radiator 18a and also radiated from the exhaust holes 16a, 16a,. Can be achieved.

Since the heat dissipating member 7 has the peripheral wall 19 formed therein, the air flowing through the flow path 20 and having a high temperature is supplied to the right side disposing portion 10 on which the regulators 12, 12,.
, the cooling efficiency with respect to the heat generated from the regulators 12, 12,... can be improved.

Furthermore, even if external air flows in through the intake holes 18c, 18c,..., The flow of air from the arrangement space 4 to the main body side space 3 is blocked by the partition plates 10, 11. Dust does not enter the main body side space 3 together with air introduced from the outside. Accordingly, it is possible to ensure the proper operation of the first driving unit 8 and the second driving unit 9, particularly, the optical pickup, and to prevent a short circuit between fine pitch patterns of electronic components.

When the first drive unit 8 or the second drive unit 9 is driven, the fan 22 is rotated at the same time. Therefore, when the fan 22 is rotated, the high-temperature air is discharged from the exhaust holes 16a, 16a,... To the outside and the low-temperature external air flows from the intake holes 18c, 18c quickly. The cooling efficiency can be further improved.

In the optical disk device 1, since the air intake holes 18c, 18c,... Are formed immediately above the second heat radiating portion 18a, the temperature rise caused by the power transistor 13 is suppressed. The effect is very large.

In the optical disk device 1, the arrangement space 4 is formed on the side opposite to the side on which the operation section 5 is provided, that is, on the rear end, and the intake holes 18c, 18c,.
, 16a,..., the fan 22
It is difficult for the operator to transmit the sound generated during the rotation of the fan 22, and noise caused by the rotation of the fan 22 can be prevented.

Although the case where the partition plates 10 and 11 are formed of a metal material has been described above, for example, the partition plates may be formed of a resin material having low thermal conductivity. If the partition plate is made of a material, the effect that the heat in the arrangement space 4 is difficult to be transmitted into the main body side space 3 is produced.

The regulator 1 is also provided in the main body side space 3.
The heat generation amount is lower than that of the power transistors 13, 12, 12,. Therefore, in order to suppress the temperature rise in the main body side space 3, for example, measures such as forming the main body side housing 6 with a material having a high heat dissipation property may be taken.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment when the present invention is carried out. Should not be construed as limiting the technical scope of the present invention.

[0046]

As is apparent from the above description, the electronic apparatus of the present invention has a space on the main body side in which the driving section is disposed and an arrangement space in which a predetermined heat generating section which generates heat when the driving section is driven is disposed. Is formed in the outer casing, and a partition plate for separating the main body side space and the arrangement space is provided.

Therefore, since the heat generated from the heat generating portion is hardly transmitted to the main body side space and the temperature of the main body side space is hardly increased,
Good operation of the drive unit can be ensured.

Further, since it is possible to prevent air from flowing into the main body side space by the partition plate, it is possible to prevent dust from entering the main body side space, and to ensure proper operation of the drive unit. In addition, it is possible to prevent a defect such as a short circuit between fine pitch patterns of the electronic component.

According to the second aspect of the present invention, the outer casing has an intake hole for taking in external air into the arrangement space and an exhaust hole for discharging the air introduced into the arrangement space to the outside. Therefore, the air in the arrangement space, which has been heated to a high temperature by the heat generating portion, is discharged from the exhaust hole, so that the cooling efficiency can be improved.

According to the third aspect of the present invention, since a fan for circulating the taken-in external air is provided in the arrangement space, the high-temperature air is discharged from the exhaust hole to the outside and the intake hole is provided. The low-temperature external air flows in quickly from the air, and the cooling efficiency can be further improved.

According to the fourth and fifth aspects of the present invention, since the intake holes are formed above and near the heat generating portion, the effect of suppressing the temperature rise caused by the heat generating portion is very large.

In the invention according to claims 6 to 8, an operation section in which a predetermined operation switch is arranged is provided on one outer surface of the outer casing, and is located on the opposite side of the one outer face of the outer casing. Since the intake hole and the exhaust hole are formed on the other outer surface, the noise generated during the rotation of the fan is hardly transmitted to the operator, and noise due to the rotation of the fan can be prevented.

According to the ninth to sixteenth aspects of the present invention, the outer casing is formed as a box-shaped main body side opening on one side and a partition plate for closing the opening of the main body side housing. And a heat radiating member disposed so as to cover the heat radiating member or the main body side housing, forming a mounting projection on the heat radiating member or the main body side housing or the heat radiating member. The contact area between the heat radiating member and the main body side housing is extremely small because it is attached to the main body side housing, so heat is hardly conducted from the heat radiating member to the main body side housing, and the temperature rise in the main body side space is further suppressed. Can be.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the electronic apparatus of the present invention together with FIG. 2 to FIG. 9, and FIG. 1 is a schematic side view of an optical disk device to which the present invention is applied.

FIG. 2 is a schematic cross-sectional view of the optical disc device showing a first portion of an arrangement space.

FIG. 3 is a schematic sectional view of the optical disc device showing a second portion of the arrangement space.

FIG. 4 is a schematic rear view showing the optical disc device in a state where a heat radiation member is removed.

FIG. 5 is a schematic rear view showing the optical disk device.

FIG. 6 is a conceptual diagram showing a flow of air in a flow channel.

FIG. 7 is a schematic rear view of the heat dissipation member.

FIG. 8 is a schematic front view of a heat radiation member.

FIG. 9 is an enlarged sectional view taken along line IX-IX of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk apparatus (electronic device), 2 ... outer case, 3 ... body side space, 4 ... arrangement space, 5 ... operation part, 5b ... operation switch, 6 ... body side case, 7 ... heat dissipation member, 8 ... 1 drive unit (drive unit), 9 second drive unit (drive unit), 10 partition plate, 11 partition plate, 12 regulator (heating unit), 1
3: Power transistor (heat generating portion), 18c: Intake hole,
21: mounting protrusion, 22: fan

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E360 AB70 BD02 EA24 EA30 ED02 GA23 GA24 GA25 GA27 GB01 GB11 5E322 AA11 AB01 AB07 AB11 BA01 BB03 CA05

Claims (16)

[Claims] 1. A main body-side space in which a driving unit is arranged and an arrangement space in which a predetermined heat-generating unit that generates heat when the driving unit is driven are formed in an outer casing, and separates the main body-side space from the arrangement space. An electronic device comprising a partition plate. 2. An outer casing according to claim 1, wherein an intake hole for taking in external air into the arrangement space and an exhaust hole for discharging the air introduced into the arrangement space to the outside are formed in the outer casing. Electronic device as described. 3. The electronic device according to claim 2, wherein a fan for circulating the taken-in external air is provided in the arrangement space. 4. The electronic device according to claim 2, wherein an intake hole is formed above and near the heat generating portion. 5. The electronic device according to claim 3, wherein an intake hole is formed above and near the heat generating portion. 6. An operation unit having a predetermined operation switch disposed on one outer surface of the outer housing, and the intake hole and the exhaust hole formed on the other outer surface of the outer housing opposite to the one outer surface. 4. The method according to claim 3, wherein
An electronic device according to claim 1. 7. An operation unit having a predetermined operation switch disposed on one outer surface of the outer housing, and the intake hole and the exhaust hole are formed on the other outer surface of the outer housing opposite to the one outer surface. 5. The method according to claim 4, wherein
An electronic device according to claim 1. 8. An operation unit having a predetermined operation switch disposed on one outer surface of the outer housing, and the intake hole and the exhaust hole are formed on the other outer surface opposite to the one outer surface of the outer housing. 6. The method according to claim 5, wherein
An electronic device according to claim 1. 9. The outer casing is composed of a box-shaped body-side casing opened on one side, and a heat-radiating member arranged so as to close the opening of the body-side casing and cover the partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 1. 10. The outer casing is composed of a box-shaped main body side opened to one side, and a heat radiating member arranged so as to close an opening of the main body side casing and cover a partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 2. 11. The outer casing is composed of a box-shaped body-side housing opened on one side, and a heat-radiating member arranged to close an opening of the body-side housing and cover a partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 3. 12. The outer casing is composed of a box-shaped body-side housing opened on one side and a heat-radiating member arranged so as to close the opening of the body-side body and cover the partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 4. 13. The outer casing is composed of a box-shaped body-side casing opened on one side, and a heat-radiating member arranged so as to close the opening of the body-side casing and cover the partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 5. 14. The outer casing is composed of a box-shaped main body side opening on one side and a heat radiating member arranged so as to close the opening of the main body side casing and cover the partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 6. 15. The outer casing is composed of a box-shaped body-side housing opened on one side and a heat-radiating member arranged so as to close an opening of the body-side body and cover a partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. The electronic device according to claim 7. 16. The outer casing is composed of a box-shaped body-side casing opened on one side, and a heat-radiating member arranged so as to close the opening of the body-side casing and cover the partition plate. A mounting projection is formed on the heat radiating member or the main body side housing, and the heat radiating member is mounted on the main body side housing in a state where the mounting projection is abutted against the main body side housing or the heat radiating member. An electronic device according to claim 8.