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JP2000242283

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2000242283
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
portable reproduction apparatus provided with a speaker.
[0002]
2. Description of the Related Art A karaoke apparatus will be described as an example of a
portable reproduction apparatus provided with a conventional speaker. FIG. 4 shows a schematic
configuration diagram of a conventional karaoke apparatus. In FIG. 4, the karaoke apparatus 41
loads a cassette tape recording the performance of karaoke on the front surface of the housing
42 and reproduces the cassette deck 43 and its operation unit 43a, and the cassette deck 44 and
the operation thereof. And a unit 44a.
[0003]
In addition, on the front of the housing 42, an input terminal 45 of a microphone, and an
operation unit 46 for adjusting the volume of the performance of karaoke being reproduced, the
volume of sound input from the microphone, the length of reverberation time, etc. There is. In
addition, a speaker 47 is attached to the front of the housing 42 so that a karaoke performance
or a voice input from a microphone can be output from the front of the housing 42 as a voice.
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[0004]
A handle 48 is attached to the upper surface of the housing 42 so that the karaoke apparatus 41
can be carried.
[0005]
In order to make the listener hear the karaoke performance and the voice input from the
microphone using the above-described karaoke apparatus 41, it is necessary to set the speaker
47 of the karaoke apparatus 41 in the direction of the listener.
A person who operates the karaoke apparatus 41 and uses a microphone (hereinafter referred to
as a user) will be located between the karaoke apparatus 41 and the listener, and when operating
the karaoke apparatus 41, the listener should It will turn.
[0006]
In addition, since the user is located between the karaoke apparatus 41 and the listener, the user
is located near the speaker 47 of the karaoke apparatus 41 that outputs audio, and it becomes
easy to cause howling, so the playback volume is increased. I could not.
[0007]
Also, if the user operates the karaoke apparatus 41 while holding the microphone, the user
approaches the speaker too much to cause howling, so the user must turn off the switch provided
on the microphone before operating the karaoke apparatus 41. As it did not, it was complicated.
[0008]
Moreover, since the speaker 47 of the karaoke apparatus 41 mentioned above exists in the front
of the housing | casing 42, there existed a limit in enlarging the magnitude | size of the speaker
47. FIG.
Therefore, there is a limit to miniaturizing the karaoke apparatus 41 that can increase the
volume and sound quality.
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[0009]
Further, since the speaker 47 is provided in front of the housing 42, the listening area is narrow
in front of the karaoke apparatus 41 only.
[0010]
SUMMARY OF THE INVENTION According to the present invention, the user can reduce the size
of the playback device provided with the speaker to a portable size and to operate easily, and the
listening area is a side view of the playback device. The purpose is to extend to the direction so
that a large sound output can be obtained.
[0011]
According to a first aspect of the present invention, there is provided a playback apparatus
comprising a housing having a speaker attached thereto for playing back audio information from
a recording medium. Playback unit, an operation unit for operating the playback unit, an external
input terminal, a mixer for mixing an output from the external input terminal and an output from
the playback unit, and an audio output by the output from the mixer The apparatus is
characterized in that the speaker is attached to a housing surface opposite to the housing surface
on which the operation unit is attached and a housing surface on both sides.
[0012]
Further, according to the playback apparatus of the second aspect of the present invention, in the
playback apparatus of the first aspect, the speakers attached to both side surfaces of the housing
have the same type and substantially the same performance. It is characterized by driving in the
same phase.
[0013]
According to a third aspect of the present invention, there is provided the playback apparatus
according to the first or second aspect, wherein the respective surfaces of the casing are
connected substantially at right angles with each other. There is.
[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention
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will be described with reference to the drawings.
FIG. 1 is an external view of a recording and reproducing apparatus according to an embodiment
of the present invention, and FIG. 2 is a sectional view of the recording and reproducing
apparatus.
In FIG. 1 and FIG. 2, the recording and reproducing apparatus 1 is, for example, a portable
recording and reproducing apparatus used for dancing, dancing, or practicing karaoke.
[0015]
The recording / reproducing apparatus 1 has an open / close lid 3a for loading a cassette tape on
the cassette deck 3 for recording and reproduction on the front surface 2a of the housing 2 and
an operation button for operating the cassette deck under the open / close lid 3a. 3b is provided.
[0016]
In the lower part of the front face 2a of the housing 2, there is provided an opening 4b of a
loading tray 4a for loading a compact disc into a disc player 4 for reproducing compact discs,
and the disc player 4 is operated beside the opening 4b The operation button 4c is disposed.
[0017]
Further, the input terminal 5 of the microphone 13 and the external input terminal 6 for
connecting a mini disc player etc. are input to the left side of the open / close lid 3a for loading
the cassette tape on the front surface 2a of the housing 2 Volumes 5a and 6a are provided to
adjust the volume level of the audio signal.
[0018]
Further, on the right side of the open / close lid 3a for loading the cassette tape on the front
surface 2a of the housing 2, a volume 7 for adjusting the volume level of the play signal
reproduced by the cassette deck 3 and the disc player 4 and a tape of the cassette deck 3 A
volume 8 is provided to adjust the speed.
[0019]
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A speaker 11 a is attached to the back surface 9 opposite to the front surface 2 a of the housing
2.
Further, speakers 11b and 11c are attached to the left and right side surfaces 10a and 10b,
respectively.
A handle 12 is attached to the upper surface of the housing 2 so that it can be carried.
[0020]
The size at which people can easily carry things by hand is that when the lower part of the thing
is below the knee, it is difficult to carry on the foot when walking, so the lower part of the thing
may be above the position per knee preferable.
In addition, it is preferable that the width be smaller than the waist width, since it is difficult for a
person to hold in front of the body and hold it with arms if the width of the object is greater than
the waist width.
Furthermore, if the width of the object is smaller than the waist width, it will not bother other
people in the crowded crowd.
As an example mentioned above, a commuting bag applies to this condition.
[0021]
The conditions for easy transport are the same for portable recording and playback devices.
In the case of a normal adult, the dimensions of the recording / reproducing apparatus satisfying
the above conditions are about 25 cm in height to the knee and about 40 cm in lateral width.
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[0022]
If the cassette deck 3 and the disc player 4 and the operation buttons are arranged on the front
surface 2a of the housing 2 in accordance with the above conditions, only small speakers with a
diameter of about 4 cm can be attached on both sides where the disc player 4 is arranged. It
disappears.
Therefore, since a large audio output can not be output, the area which can be listened to
becomes very small.
[0023]
In order to load the compact disc into the disc player 4, the depth of the disc player 4 needs to be
at least 13 cm or more, so the depth dimension is about 30 cm which is stable when installed
without being a burden of carrying. Then, a space of about 17 centimeters is obtained on the
back surface 9.
[0024]
In the present embodiment, a speaker is attached to the back surface 9.
That is, since it is possible to attach a speaker having a diameter of up to about 20 centimeters, it
is possible to output a large audio output, and to enlarge the area that can be listened to.
If a thin speaker is used, the depth dimension can be shortened.
[0025]
In addition, speakers were attached to both sides of the recording / reproducing apparatus 1.
That is, since a space having a height of about 25 centimeters, a width of about 30 centimeters
or less, and a depth of about 4 centimeters is obtained, it is possible to attach a speaker having a
diameter of about 12 centimeters. Therefore, the listening area can be extended to both side
surfaces of the recording and reproducing apparatus 1.
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[0026]
FIG. 3 shows a block diagram of a recording and reproducing apparatus according to an
embodiment of the present invention. In FIG. 3, the recording / reproducing apparatus 1 has an
input terminal 5 for connecting a microphone 13 and an external input terminal 6 for connecting
a mini disc player etc. The input terminal 5 is for an amplifier 31 and the external input terminal
6 is for an amplifier 32. It is connected.
[0027]
The output of the amplifier 31 is input to the mixer 33 via the volume 5a, and the output of the
amplifier 32 is input to the mixer 33 via the volume 6a. The cassette deck 3 and the disc player 4
are connected to an amplifier 34, and the output of the amplifier 34 is input to the mixer 33 via
the volume 7.
[0028]
The output of the mixer 33 is input to a power amplifier 35 for driving the speaker 11 a attached
to the back surface 9 of the housing 2, and the power amplifier 35 drives the speaker 11 a.
Further, the output of the mixer 33 is input to the power amplifier 36 for driving the speakers 11
b and 11 c attached to the left and right side surfaces 10 a and 10 b of the housing 2, and the
power amplifiers 36 are connected in parallel in phase. The speakers 11b and 11c are driven.
[0029]
Since the speakers 11 b and the speakers 11 c are attached to the left and right sides 10 a and
10 b of the housing 2, the listening area can be extended to both sides of the recording and
reproducing apparatus 1 as shown by dotted lines in FIG.
[0030]
Further, since the speaker 11b and the speaker 11c are mounted opposite to each other and
driven in the same phase, as shown by arrows A and B in FIG. 2, the diaphragms of the speaker
11b and the speaker 11c vibrate in opposite directions. The mechanical vibrations generated by
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the vibration of the diaphragm are also in opposite directions.
[0031]
And since the speaker 11b and the speaker 11c are the same kind and have substantially the
same performance, it is possible to cancel the mechanical vibration of the speaker 11b and the
speaker 11c generated by the vibration of the diaphragm.
Therefore, even if the speaker 11b and the speaker 11c are attached to the housing 2 and driven,
the mechanical vibration is not promoted. Therefore, the mechanical vibration of the housing 2 is
large even if the sound output of the speaker 11b and the speaker 11c is increased. It does not.
Therefore, the optical pickup of the disc player 4 housed in the housing 2 can be prevented from
causing off-track (sound skipping) due to mechanical vibration of the housing 2.
[0032]
Further, since the speakers are disposed on the back surface 9 and both side surfaces 10a and
10b of the housing 2, the listening area is as shown by a dotted line in FIG. Howling is less likely
to occur even if the sound output from the speaker is increased.
[0033]
In addition, since the speakers are provided on the back and both sides opposite to the operation
surface of the recording and reproducing apparatus and are not provided on the operation
surface, the recording and reproducing apparatus can be miniaturized.
In addition, since the speakers are disposed on the back and both sides opposite to the operation
surface of the recording and reproducing apparatus, the recording and reproducing apparatus
can be disposed between the user and the listener, and the recording is performed while facing
the listener The playback device can be operated.
[0034]
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According to the present invention, it is possible to miniaturize the reproduction apparatus
provided with the speaker to a size that can be easily carried. In addition, since the playback
apparatus can be operated while facing the listener, the operation can be facilitated. Also, the
listening area can be extended to the side direction of the playback device. Further, even if the
playback apparatus is downsized to a portable size, a large speaker can be attached and a large
audio output can be provided, so the listening area can be extended far.
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