JPH11220680A - Video and sound device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video and sound device in which reliability for the atmosphere and environment of the operation of a disk device can be improved, and simultaneously a noise level generated from a video acoustic device can be reduced. SOLUTION: This device is provided with an electromagnetic shield case 30-3 mounted in a cabinet, disk device 30-1 mounted through a visco-elastic member 30-4 on the electromagnetic shield case for operating the recording and reproduction of video data, voice data, and character data, picture processing circuit 30-2 fixed and stored higher position than the disk device in the electronic shield case for operating the compression processing and extension processing of the video data, voice data, and character data, and operating the recording and reproduction processing to the disk device, and transfer radiating means 30-5 whose one edge is mounted on the disk device, and whose other edge is arranged outside the electromagnetic shield case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video and audio apparatus for processing video data, audio data, and character data.
In particular, data recording and playback can be performed simultaneously,
Also, while receiving a broadcast program, pause, delay,
The present invention relates to a video and audio device capable of performing reverse return, data compression, data editing, and the like.

[0002]

2. Description of the Related Art In equipment used for multimedia,
It is necessary to process a large amount of video data, audio data, and character data immediately or simultaneously, and to record and read data at high speed and at random. Conventionally, a video tape recorder (hereinafter, referred to as VTR) or an audio tape recorder (hereinafter, referred to as ATR) has been widely used as an apparatus for recording and reproducing data. However, in the VTR or the ATR, for example, only a reproducing operation is performed while a recorded program is being reproduced. Therefore, unless a plurality of devices are provided, data recording and reproduction cannot be performed simultaneously. For example, VTR
In some cases, while recording of a program being viewed, the user may need to interrupt the viewing of the program, or may want to view the same part repeatedly. And when you want to watch the program in the order of broadcast,
The user must wait until all the programs being recorded have ended. When a recorded program is being played back and viewed, the currently broadcasted program cannot be recorded.

In view of the above, there has been proposed an audiovisual apparatus having a disk device capable of performing random access as described above, for example, Japanese Patent Application Laid-Open No. 6-245157 (hereinafter referred to as Conventional Example 1) and Japanese Patent Application Laid-Open No. No. 30903 (hereinafter referred to as Conventional Example 2). Conventional example 1
Is shown using FIG. 7, which is a principle diagram of the audiovisual apparatus. The audiovisual apparatus includes an operation unit 110 to which a command is input by a user, a control circuit 111 for performing control based on the content input to the operation unit 110, and a control circuit 11.
1, a tuner 102 for adjusting the frequency of a radio wave received by the antenna 1, an antenna 101 for receiving the radio wave adjusted by the tuner 102, a recording processing circuit 103 for recording received data, and simultaneously and independently performing recording and reproduction. A recording / reproducing apparatus 104 capable of reproducing data, a reproduction processing circuit 105 for performing data reproduction processing, a video circuit 106 for processing video data and character data input from the reproduction processing circuit 105 under the control of the control circuit 111, and A CRT 107 for displaying, an audio circuit 108 for processing audio data input from the reproduction processing circuit 105 under the control of the control circuit 111, and two speakers 109a and 109b for outputting audio data are provided.

[0004] With this configuration, a broadcasted program can be recorded and reproduced while being received, and the progress of the program can be stopped or restarted. Furthermore, by accelerating the progress of the program during reproduction, an uninteresting part of the program can be omitted, and by reversing, a part of the program can be watched again.

[0005] The video and audio apparatus of the second conventional example will be described with reference to FIGS. 8A and 8B which are principle diagrams of the video and audio apparatus. The audiovisual apparatus includes an encoding circuit 112 for encoding data, and a decoding circuit 1 for decoding data.
17, a television monitor 118 for displaying data decoded by the decoding circuit 117, a recording / reproducing circuit 114 for recording data on the disk 121 and reproducing data from the disk 121, writing data on the disk 121, and writing data on the disk 121 A recording / reproducing head 113 for reading data from the CPU, and a control unit 116 for controlling the changeover switch 115 based on a signal from the selection signal input 119 to switch the state of the recording / reproducing head 113 to recording or reproduction. The plurality of disks 121, the plurality of recording / reproducing circuits 114, and the plurality of recording / reproducing heads 113
Disk device 1 that can simultaneously and independently perform recording and reproduction
20.

[0006] With this configuration, the state of the recording / reproducing head can be switched between recording and reproduction, and one or more data can be read from the disk and displayed on the television monitor 118 while recording data on the disk. .

[0007]

The disk devices, such as the recordable / reproducible magnetic disk device, magneto-optical disk device, and phase-change type optical disk device, of the above-mentioned prior art examples 1 and 2 are combined with a certain type of terminal function. It is used by being incorporated in an audio-visual apparatus such as a computer including a television receiver of a type. The temperature of the disk device in the ambient environment specification is generally 0 ° C. or more and 55 ° C. or less. In general, the ambient temperature at which the audiovisual apparatus is used is not less than −20 degrees and not more than 40 degrees. Since the heat source is inside the audiovisual apparatus, the temperature inside the audiovisual apparatus rises by about 25 degrees in use and may exceed 55 degrees during use. As a result, the ambient temperature in the audiovisual device in which the disk device is installed may be outside the temperature specification of the disk device. For this reason, there has been a problem in the error rate and the access time of the disk device due to the ambient temperature. Also, as with temperature, humidity, dew, electromagnetic fields, vibration and shock may fall outside the range of each specification when using information equipment.Therefore, there are problems with the error rate and access time of the disk device. Had occurred. Therefore,
There was a problem in the reliability of the disk device with respect to the atmospheric environment specifications.

The noise specification of a television, which is one of the audiovisual apparatuses, has a noise level of 30 dB · A or less at a position 50 cm away from the screen. The noise level of 30 dB · A is the noise level of a library. On the other hand, the vibration of the spindle motor and the vibration of the voice coil motor at the time of head positioning cause the base of the disk device to vibrate.
Noise is generated from the disk drive. This noise level
50 dB maximum at a position 50 cm away from the disk drive
-It is A. The noise level of 50 dB · A is the noise of a quiet factory. When a disk device is incorporated in an audiovisual device such as a television used in ordinary homes having a noise level of about 40 dB · A, there is a problem in the level of the noise level.

As a conventional example relating to the improvement of the reliability of the disk device, which is the above problem, there is one in which the ambient temperature inside the audiovisual device is air-cooled by a fan. In this case, it is necessary to consider noise generated from a fan or the like.
Further, as a conventional example for reducing the noise, which is the above problem, there is one in which a base is covered with a sound absorbing material. In this case,
The sound absorbing material impedes heat radiation from the disk device to the outside. Therefore, when the disk device is built in the audiovisual device, it is necessary to consider the ambient temperature around the disk device. However, in the above case, it has been impossible to simultaneously improve the reliability of the operation of the disk device with respect to the atmosphere and environment and reduce the noise level generated from the audiovisual device.

As a conventional example of the audiovisual apparatus, there is an audiovisual apparatus in which a disk device is housed in an electromagnetic shield case and is separated from a circuit portion of the audiovisual apparatus. However, this conventional example does not describe measures against heat generated by the circuit and noise generated by the optical disk device.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to improve the reliability of the operation of a disk device with respect to the atmosphere and environment and to reduce the noise level generated from an audiovisual device at the same time. It is an object to provide an audio device.

[0012]

According to the present invention, there is provided a video and audio apparatus comprising: a video and audio input unit for receiving video data, audio data and character data; a video output for displaying a video from the video data and displaying a character from the character data; Means, an audio output means for outputting audio from audio data, a cabinet containing the video / audio input means and the video output means, and having a cabinet front, a chassis block and a cabinet rear, an electromagnetic shield case mounted in the cabinet A disk device attached to the electromagnetic shield case via a viscoelastic member to record and reproduce video data, audio data and character data,
An image processing circuit fixedly stored at a position higher than the disk device in the electromagnetic shield case, performing compression processing and decompression processing of video data, audio data and character data, and performing recording and reproduction processing on the disk device;
And a conduction radiator having one end attached to the disk device and the other end disposed outside the electromagnetic shield case. By configuring the audiovisual apparatus in this manner, it is possible to realize an audiovisual apparatus that maintains high reliability of the disk apparatus with respect to the ambient temperature around the disk apparatus and reduces noise from the disk apparatus to the outside.

According to another aspect of the present invention, there is provided a video and audio apparatus for receiving video data, audio data and character data, a video output means for displaying a video from video data and a character from character data. Audio output means for outputting audio from audio data, the video / audio input means and the video output means are stored, a cabinet having a cabinet front, a chassis block and a cabinet rear, a first case mounted in the cabinet; An electromagnetic shield, comprising: a heat shield plate attached to the first case; and a second case attached to the heat shield plate and thermally separated from the first case by the heat shield plate. A case, which is attached to the first case via a viscoelastic member, and includes video data, audio data, and character data; A disk device that performs recording and reproduction, an image processing circuit that performs a compression process and an expansion process of video data, audio data, and character data stored in the second case, and performs a recording and reproduction process on the disk device; and A conductive heat radiating means having one end attached to the disk device and the other end disposed outside the electromagnetic shield case; By configuring the audiovisual apparatus in this manner, it is possible to realize an audiovisual apparatus that maintains high reliability of the disk apparatus with respect to the ambient temperature around the disk apparatus and reduces noise from the disk apparatus to the outside.

In one specific configuration of the above-described audiovisual apparatus, the electromagnetic shield case has an intake / exhaust hole for heat radiation on the entire surface. This makes it possible to reduce the increase in the ambient temperature around the disk device.

In one specific configuration of the above-described audiovisual apparatus, the first case has an intake / exhaust hole for heat dissipation only on the upper and lower surfaces, and the second case has an entire surface for heat dissipation. Has intake and exhaust holes. This makes it possible to reduce the increase in the ambient temperature around the disk device and to reduce noise leaking from the disk device to the outside.

In one specific configuration of the above-described audiovisual apparatus, the electromagnetic shield case has cover means which does not block the intake / exhaust hole and prevents foreign matter from entering the electromagnetic shield case. This makes it possible to reduce the increase in the ambient temperature around the disk device and prevent foreign matter such as water from being applied to the disk device.

In one specific configuration of the above-described audiovisual apparatus, the other end of the conductive heat radiation means is attached to the electromagnetic shield case or the cabinet. As a result, the temperature rise of the disk device can be reduced.

In one specific configuration of the above-described audiovisual apparatus, the cabinet is provided at an intake hole provided at a position substantially directly below the disk device, and at a position higher than an upper surface of the disk device. It has an exhaust hole and does not have an intake hole at a position corresponding to the position above the disk device. This makes it possible to reduce the increase in the ambient temperature around the disk device and prevent foreign matter such as water from being applied to the disk device.

In one specific configuration of the above-described audiovisual apparatus, the cabinet includes an intake hole provided at a position substantially directly below the disk device, and an exhaust hole provided at a position higher than the upper surface of the disk device. A hole, and an air guide path connecting the intake hole and the exhaust hole,
The electromagnetic shield case is disposed in the air guide path. This makes it possible to reduce the increase in the ambient temperature around the disk device and to reduce noise leaking from the disk device to the outside.

[0020]

Embodiments of the present invention will be described with reference to the drawings. << Embodiment 1 >> Regarding the audiovisual apparatus in Embodiment 1,
This will be described with reference to FIGS.

Hereinafter, the configuration of the audiovisual apparatus according to the first embodiment will be described with reference to FIGS. FIG. 1 (a)
FIG. 1B is a side cross-sectional view and a cross-sectional view as viewed from the back, respectively, showing the configuration of the audiovisual apparatus according to the first embodiment. FIGS. 2A and 2B are a partially cutaway front view and a side sectional view, respectively, showing the drive unit 30 incorporated in the audiovisual apparatus of FIG. In FIG. 1, the audiovisual apparatus includes a video / audio input unit 10, a reproduction processing unit 20, a drive unit 30, and a cabinet 40 in a cabinet 40. The antenna 10-0 receives video data, audio data, and character data of a broadcast program. The video / audio input unit 10 includes a tuner 10-1 for selecting a frequency of a radio wave received by the antenna 10-0 and a recording processing circuit 10-2 for recording data of a received program. The reproduction processing unit 20 performs a reproduction process of the recorded video data, audio data, and character data.
1. It has a video circuit 20-2 for processing video data and character data reproduced by the reproduction processing circuit 20-1, and an audio circuit 20-3 for processing audio data reproduced by the reproduction processing circuit 20-1. The TV monitor 20-4 displays video data and character data, and two speakers 20-
5 outputs audio data. The video / audio input unit 10 including the tuner 10-1 and the recording processing circuit 10-2, and the reproduction processing unit 20 including the reproduction processing circuit 20-1, the video circuit 20-2, and the audio circuit 20-3,
It is fixed to the substrate 1020.

The cabinet 40 includes a front part 4 of the cabinet.
0-1, a cabinet rear part 40-2, and a chassis block 40-3. An intake hole 40-4a is provided at a position corresponding to a position directly below the drive unit 30 in the rear portion 40-2 of the cabinet, and an exhaust hole 40-4b is provided from an upper surface of a magnetic disk device 30-1 to be described later, which is disposed in the drive unit 30. It is provided at a high position. Here, the intake hole 40-4a is a hole through which outside air flows into the cabinet 40 when the ambient temperature inside the cabinet rises. The exhaust hole 40-4b is a hole through which air inside the cabinet flows out of the cabinet. When water or the like flows into the cabinet 40 through the exhaust holes 40-4b, the exhaust holes 40-4b are located above the drive unit 30 so that the inflowing water does not reach the magnetic disk 30-1 described later. It is not provided on the top of the cabinet rear part 40-2.

As shown in FIG. 2, the drive unit 30 provided in the cabinet 40 includes a magnetic disk device 30-1 for recording and reproducing video data, audio data and character data, video data, audio data and text data. An image processing circuit 30 for performing data compression processing and decompression processing;
2, electromagnetic shield case 30-3, magnetic disk device 3
The drive unit 30 has a damping member 30-4 attached to the cover 0-1 and a heat transfer sheet member 30-5 for radiating heat generated from the image processing circuit 30-2 to the outside of the drive unit 30. The electromagnetic shield case 30-3 is attached to the chassis block 40-3 with a support base 30-b sandwiching a vibration-proof rubber made of a viscoelastic member in order to prevent the vibration generated from the magnetic disk device 30-1 from being transmitted to the cabinet 40. It is fixed at. The electromagnetic shield case 30-3 has an intake / exhaust hole on the entire surface for heat radiation.
3a and 30-3b, and a fixed base 30-3c to which the damping material 30-4 is attached.
0-1 and the image processing circuit 30-2 are stored. The electromagnetic shield case 30-3 is for blocking electromagnetic waves radiated from the magnetic disk device 30-1 and the image processing circuit 30-2 to the outside. Here, the intake and exhaust holes are of a size that can block electromagnetic noise to the outside, and that the outside air can flow into the electromagnetic shield case and the air in the electromagnetic shield case can flow out to the outside. For example, 1m in length
It is a hole having a diameter of 1 to 5 mm or a hole having a diameter of 1 to 5 mm. The damping material 30-4 is for reducing noise and vibration generated from the magnetic disk device 30-1, and is a viscoelastic member such as sponge or rubber. The heat transfer sheet material 30-5 is attached to the cover of the magnetic disk device 30-1 so as to be drawn out of the electromagnetic shield case and contact the cabinet 40. The heat transfer sheet material 30-5 is preferably made of, for example, aluminum or copper. Here, the image processing circuit 30-2
Are the projections 30-3d of the electromagnetic shield case 30-3a.
It is fixed at. Also, the magnetic disk device 30-1
Is located at a position lower than the image processing circuit 30-2 that generates heat so that it does not come into contact with anything other than the damping material 30-4.
It is fixed to the fixed base 30-3c via 0-4.

The drive unit 30 is located at a position where the increase in the ambient temperature inside the cabinet 40 has been confirmed to be small according to the experimental results, and at a position apart from the circuit portion of the video / audio input unit 10 and the reproduction processing unit 20, ie, the television screen. It is located in the lower right part toward. The results of measuring the rise in ambient temperature inside the audiovisual apparatus with respect to the ambient temperature after the power is turned on are shown. Inside the audiovisual apparatus, the position where the increase in the ambient temperature is the largest is the upper part of the audiovisual input unit 10 and the reproduction processing unit 20, the location 100-a in FIG.
The rise was 23 ° C. On the other hand, the position where the increase in the ambient temperature was the smallest was at the bottom of the rear part 40-4b of the cabinet, a place 100-b in FIG.
It was below.

Next, the relationship between the ambient temperature of the magnetic disk device 30-1 and the access time, and the noise level generated from the magnetic disk device will be described. FIG. 3 is an experimental result showing the relationship between the ambient temperature and the access time of the magnetic disk device 30-1 mounted on the audiovisual device for random write and sequential write. Here, the access time is the time from when a signal is input from the recording processing unit to the magnetic disk device to when the recording process is completed, or when the reproduction process is completed after the signal is output from the magnetic disk device to the reproduction processing unit. It is time to do. With random write, the head moves to any track on the hard disk,
It refers to an operation of recording data while moving irregularly and continuously. Sequential write refers to an operation in which the head sequentially moves tracks from the outer circumference to the inner circumference or from the inner circumference to the outer circumference of the hard disk to record data. As shown in FIG. 3, when the ambient temperature around the magnetic disk device becomes 80 ° C. or more, the access time becomes longer. Further, as a result of measuring the noise level generated from the magnetic disk device 30-1, the noise level at a position 1m from the magnetic disk device was 40dB · A.

In the audiovisual apparatus configured as described above, the magnetic disk drive 30-1 to the magnetic disk drive 3
Heat is transmitted to the cabinet 40 via the heat transfer sheet material 30-5 attached to 0-1. Therefore, the temperature of the magnetic disk device 30-1 can be lowered. Further, when the ambient temperature inside the cabinet 40 and the electromagnetic shield case 30-3 rises, the outside air flows into the bottom intake hole 40.
-4a flows into the interior of the cabinet 40, and the air flowing into the cabinet 40 flows through the intake / exhaust holes provided in the lower portion of the electromagnetic shield case 30-3.
It flows into convection 0-3. The air that has flowed into the electromagnetic shield case 30-3 and the temperature of which has risen inside the electromagnetic shield case 30-3 flows through the intake / exhaust holes by convection, so that the electromagnetic shield case 30 −
Outflow of 3 The warm air that has flowed out of the electromagnetic shield case 30-3 further flows out of the cabinet 40 through the exhaust holes 40-4b. In this manner, the air flows from the bottom to the top of the magnetic disk device 30-1, and the increase in the ambient temperature around the magnetic disk device 30-1 decreases. The magnetic disk device 30-1 is arranged below the image processing circuit 30-2 that generates heat. Therefore, even if the air in the drive unit 30 flows upward from below the magnetic disk device 30-1,
The air whose temperature has been increased by the heat generated by the image processing circuit 30-2 is prevented from directly hitting the magnetic disk device 30-1. Damping material 30-
Since the device 4 is mounted, noise and vibration generated from the magnetic disk device can be reduced. According to the actually measured values, the noise level at 50 cm in front of the television monitor 20-4 is 34 dB · A at the time of random writing and 30 dB · A at the time of sequential writing, which is acceptable as an audiovisual device used in a quiet room or the like.

As described above, the audiovisual apparatus according to the first embodiment has better heat dissipation than the conventional apparatus, suppresses an increase in the ambient temperature of the magnetic disk drive, and maintains the ambient temperature around the magnetic disk drive even during use. It can be suppressed to about 50 ° C.
Accordingly, the ambient temperature around the magnetic disk drive falls within the range of the temperature specifications of the magnetic disk drive, which prevents a sudden increase in the access time of the magnetic disk drive and a loss of data due to an increase in the ambient temperature around the magnetic disk drive. ,
High reliability of the magnetic disk drive can be maintained. Further, noise leaking from the magnetic disk device to the outside of the cabinet can be reduced to a desirable level.

Embodiment 2 An audiovisual apparatus according to Embodiment 2 will be described with reference to FIG. 4A and 4B are a side cross-sectional view and a cross-sectional view as viewed from the back, respectively, showing the configuration of the audiovisual apparatus according to the second embodiment. Embodiment 1 Regarding the configuration of the audiovisual apparatus of Embodiment 2, Embodiment 1
The difference from the configuration of the audiovisual apparatus will be described. The same components as those of the audiovisual apparatus of the first embodiment are denoted by the same reference numerals, and the description in the first embodiment can be applied. An exhaust hole 40-4b 'is provided at a position above the drive unit 30 in the rear portion 40-2 of the cabinet of the audiovisual apparatus according to the second embodiment. An L-shaped cover 30-a for preventing water or the like from entering the cabinet interior 40 from the exhaust holes 40-4b 'so as not to cover the magnetic disk device 30-1 or the like.
It is attached to the drive unit 30 at a distance from the upper surface of the electromagnetic shield case 30-3 without preventing the intake and exhaust holes of the electromagnetic shield case 30-3.

Even when the audiovisual apparatus is configured as described above, the same effects as those of the audiovisual apparatus of the first embodiment can be obtained.

Embodiment 3 An audiovisual apparatus according to Embodiment 3 will be described with reference to FIGS. FIGS. 5A and 5B are a side sectional view and a sectional view seen from the back, respectively, showing the configuration of the audiovisual apparatus according to the third embodiment. 6A and FIG. 6B are diagrams of FIG.
Shows a drive unit built into the audiovisual device of
It is a partially broken front view and a side sectional view, respectively. Example 3
The configuration of the audiovisual apparatus according to the third embodiment is different from that of the audiovisual apparatus according to the first embodiment. The same components as those of the audiovisual apparatus of the first embodiment are denoted by the same reference numerals, and the description in the first embodiment can be applied. 5 and 6, the electromagnetic shield case 30-3 'attached to the chassis block 40-3 of the cabinet 40 includes a first case 30-3-1 for storing the magnetic disk device 30-1, and image processing. Circuit 30-
2 is stored. First
The case 30-3-1 has an electromagnetic shield case 30-3-1a and an electromagnetic shield case 30-3-1b for blocking radiation of electromagnetic waves to the outside. The electromagnetic shield case 30-3-1a has intake and exhaust holes on the upper and lower surfaces, and the electromagnetic shield case 30-3-1b does not have intake and exhaust holes. Second electromagnetic shield case 30-3-
Reference numeral 2 denotes an electromagnetic shield case 30-3-2a for blocking radiation of electromagnetic waves to the outside, and an electromagnetic shield case 3
0-3-2b. Electromagnetic shield case 30-3-
2a and 30-3-2b have intake and exhaust holes on the entire surface. Further, a heat shield plate 30-3-3 for thermally shielding the magnetic disk device 30-1 from heat generated by the image processing circuit 30-2 is provided between the first case 30-3-1 and the second case 30-3-1. It is provided between the case 30-3-2. The heat shield plate 30-3-3 is, for example, stainless steel. Also,
The second case 30-3-from the reproduction processing unit 20 side
2. The first case 30-3-1 is arranged in this order.
Further, the cabinet 40 is provided with an air guide path 50 for guiding external air from an intake hole 40-4a provided in the cabinet 40 to an exhaust hole 40-4b. Here, the drive unit 30 is connected to the air guide path 50.
Is located within.

In the audiovisual apparatus configured as described above, in addition to the effects described in the first embodiment, since the drive unit 30-1 is disposed in the air guide path 50,
The outside air flowing into the cabinet 40 from the intake hole 40-4a efficiently flows from the bottom to the top in the first case 30-3-1, and the ambient temperature around the magnetic disk device can be effectively lowered. Further, since the air guide path 50 also serves to block heat generated by the video / audio input unit 10 and the reproduction processing unit 20 from the drive unit 30, the heat generated by the reproduction processing unit causes the magnetic disk drive 3.
It is possible to prevent the ambient temperature around 0-1 from rising. Further, since the heat shield plate 30-3-3 is disposed between the first case 30-3-1 and the second case 30-3-2, the heat is generated by the image processing circuit 30-2. It is possible to prevent the ambient temperature around the magnetic disk device 30-1 from rising due to heat.

The first case is an electromagnetic shield case 30-3-1a having intake and exhaust holes on the entire upper and lower surfaces.
And an electromagnetic shield case 30-3 having no intake and exhaust holes
-1b, the magnetic disk drive 30
-1 to outside noise can be reduced. Also,
The air guide path 50 also functions to prevent the noise generated by the magnetic disk device 30-1 from leaking to the outside, so that the noise from the magnetic disk device 30-1 to the outside can be reduced. According to the actually measured value, 5 in front of the TV monitor 20-4.
The noise level at 0 cm is 34 dB
A, which is 30 dB · A at the time of sequential writing, and is acceptable as an audiovisual apparatus used in a quiet room or the like.

As described above, the audiovisual apparatus according to the third embodiment has better heat dissipation than that described in the first embodiment.
A rise in the ambient temperature of the magnetic disk device is suppressed, and the ambient temperature around the magnetic disk device can be suppressed to about 45 ° C. even during use. Accordingly, the ambient temperature around the magnetic disk drive falls within the range of the temperature specifications of the magnetic disk drive, which prevents a sudden increase in the access time of the magnetic disk drive and a loss of data due to an increase in the ambient temperature around the magnetic disk drive. Thus, high reliability of the magnetic disk device can be maintained. Further, noise leaking from the magnetic disk device to the outside of the cabinet can be reduced to a desirable level.

In the first and second embodiments, the electromagnetic shield case is composed of two members. In the third embodiment, the first case and the second case are each composed of two members. However, the present invention is not particularly limited to this, and may be configured by three members. Further, in each of the above embodiments, the damping material is attached to the cover of the magnetic disk device, but the present invention is not limited to this configuration. In each of the above embodiments, the heat transfer sheet material is attached to the side surface of the magnetic disk device so as to be in contact with the cabinet, but the heat transfer sheet material is attached to the side surface of the magnetic disk device so as to be in contact with the electromagnetic shield case. You may paste it. Further, in the above-described embodiment, the drive unit is disposed at the lower right side toward the television screen. However, the drive unit may be disposed at a position where the ambient temperature in each audiovisual device is low. Further, in each of the above embodiments, the disk device is a magnetic disk device. However, similar effects can be obtained with a disk device such as a magneto-optical disk device or a phase change optical disk device.

[0035]

According to the present invention, it is possible to reduce the rise of the ambient temperature around the disk device, thereby realizing a video and audio device that maintains high reliability of the disk device with respect to the ambient temperature around the disk device. be able to.
Further, according to the present invention, since the noise generated from the disk device is suppressed from leaking to the outside, it is possible to realize an audiovisual device having a low noise level leaking to the outside.

[Brief description of the drawings]

FIG. 1A is a side cross-sectional view of an audiovisual apparatus according to a first embodiment, and FIG. 1B is a cross-sectional view illustrating the inside of the audiovisual apparatus according to the first embodiment as viewed from the back. is there.

2A is a front view of a drive unit incorporated in the audiovisual apparatus of FIG. 1, and FIG. 2B is a side sectional view of the drive unit.

FIG. 3 is a diagram illustrating a relationship between an ambient temperature around a magnetic disk device and an access time;

4A is a side cross-sectional view of the audiovisual apparatus according to the second embodiment, and FIG. 4B is a cross-sectional view illustrating the inside of the audiovisual apparatus according to the second embodiment as viewed from the back. is there.

5A is a side cross-sectional view of the audiovisual apparatus according to the third embodiment, and FIG. 5B is a cross-sectional view illustrating the inside of the audiovisual apparatus according to the third embodiment as viewed from the back. is there.

6A is a front view in which a part of a drive unit built in the audiovisual apparatus of FIG. 5 is cut away, and FIG. 6B is a side sectional view of the drive unit.

FIG. 7 is a block diagram illustrating a configuration of a video and audio device according to Conventional Example 1.

FIG. 8A is a block diagram illustrating a configuration of a video and audio device according to Conventional Example 2, and FIG. 8B is a diagram illustrating a disk device.

[Explanation of symbols]

 Reference Signs List 10 video / audio input unit 10-1 tuner 10-2 recording processing circuit 20 reproduction processing unit 20-1 reproduction processing circuit 20-2 video circuit 20-3 audio circuit 20-4 television monitor 20-5 speaker 30 drive unit 30-1 magnetism Disk device 30-2 Image processing circuit 30-3 Electromagnetic shield case 30-4 Damping material 30-5 Heat transfer sheet material 40 Cabinet 40-1 Cabinet front 40-2 Cabinet rear 40-3 Chassis block 40-4a Intake hole 40-4b exhaust hole

Continued on the front page (72) Inventor Toshiyuki Wada 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (8)

[Claims] 1. A video / audio input means for receiving video data, audio data and text data, a video output means for displaying video from video data and displaying text from text data, and a voice output means for outputting voice from voice data. A cabinet that stores the video / audio input unit and the video output unit, and has a cabinet front, a chassis block and a cabinet rear; an electromagnetic shield case mounted in the cabinet; a viscoelastic member in the electromagnetic shield case A disk device that is attached and records and reproduces video data, audio data, and character data. The disk device is fixedly stored at a higher position than the disk device in the electromagnetic shield case, and compresses and expands video data, audio data, and character data. Processing the disk device An image processing circuit that performs recording and reproduction processing for
And a conductive heat radiating means having one end attached to the disk device and the other end disposed outside the electromagnetic shield case. 2. Video / audio input means for receiving video data, audio data and character data, video output means for displaying video from video data and displaying text from character data, and audio output means for outputting audio from voice data. A cabinet that stores the video / audio input unit and the video output unit, and has a cabinet front, a chassis block, and a cabinet rear; a first case mounted in the cabinet;
A first heat shield attached to the first case; and a first heat shield attached to the first heat shield and attached to the first case.
An electromagnetic shield case comprising: a second case that is thermally separated from the case; a second case that is attached to the first case via a viscoelastic member;
A disk device that performs recording and reproduction of video data, audio data, and character data, and performs compression processing and decompression processing of video data, audio data, and character data stored in the second case, and records and reproduces the disk device. An audiovisual apparatus comprising: an image processing circuit for performing a reproducing process; and a conductive heat radiating means having one end attached to the disk device and the other end disposed outside the electromagnetic shield case. 3. The audiovisual apparatus according to claim 1, wherein the electromagnetic shield case has an intake / exhaust hole for heat radiation on the entire surface. 4. The method according to claim 2, wherein the first case has intake and exhaust holes for heat radiation only on the upper surface and the lower surface, and the second case has intake and exhaust holes for heat radiation on the entire surface. The audiovisual apparatus according to claim 1. 5. The audiovisual apparatus according to claim 1, wherein the electromagnetic shield case has cover means for preventing the intake and exhaust holes from being blocked and preventing foreign matter from entering the electromagnetic shield case. . 6. The audio-visual apparatus according to claim 1, wherein the other end of the conductive heat radiation means is attached to the electromagnetic shield case or the cabinet. 7. The disk device, wherein the cabinet has an intake hole provided at a position substantially directly below the disk device, and an exhaust hole provided at a position higher than an upper surface of the disk device. The audiovisual apparatus according to claim 1, wherein the audiovisual apparatus does not have an intake hole at a position corresponding to the upper part. 8. The cabinet has an intake hole provided at a position substantially directly below the disk device, an exhaust hole provided at a position higher than an upper surface of the disk device, and the intake hole and the exhaust gas. 3. The audiovisual apparatus according to claim 1, further comprising an air guideway connecting the hole and the electromagnetic shield case, wherein the electromagnetic shield case is disposed in the air guideway. 4.