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JPH07199953

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DESCRIPTION JPH07199953
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
earphone-type acoustic device.
[0002]
2. Description of the Related Art There is an audio device, for example, a portable radio, in which
an earphone can be stored by providing an earphone storage unit in the device body, such as a
portable radio, etc. Did not have
[0003]
As described above, since the conventional earphone storable acoustic device does not have a
speaker in the main body of the device, it has been impossible to hear the sound by stowing the
earphone.
In addition, there is a drawback that when the speaker is attached to the device body, the shape
of the body becomes large.
[0004]
Therefore, an object of the present invention is to provide an audio device in which the earphone
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can be used as a speaker instead of the speaker and the sound can be properly heard even when
the earphone is housed in the device body.
[0005]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present
invention is characterized in that the earphone can be accommodated in an earphone
accommodating portion provided in the device main body. The configuration is characterized in
that a sound expansion function unit is provided to expand sound by, for example, reflection,
amplification or the like in the stored state of the earphone.
[0006]
Note that the sound amplification function unit is, for example, a shape of the earphone storage
unit, that is, as described in claim 2, a sound reflection surface that reflects the sound of the
earphone and a sound diffusion that diffuses the reflected sound. It is characterized in that it has
a shape having a part.
[0007]
The sound output function unit is, for example, a main body side cone paper provided in the
earphone storage unit, that is, it is connected to the cone paper in the earphone to amplify sound
as described in claim 3 It is characterized by certain things.
[0008]
[Operation] Since the sound of the earphone can be expanded by the sound expansion function
unit provided in the earphone storage unit in the earphone storage state to the device main body,
it can be used as a speaker.
[0009]
That is, for example, when the earphone housing portion is formed to have a sound reflecting
surface and a sound diffusing portion as described in claim 2, the sound of the earphone is
reflected by the sound reflecting surface in the stored state, and the reflected sound is further
reflected. Can be diffused by the sound diffusion unit.
[0010]
For example, if the main body side cone which is connected with the cone paper in the earphone
and amplifies the sound is provided in the earphone housing portion as in the third aspect, the
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sound of the earphone in the storage state is caused by the vibration of the main body side cone.
It can be amplified.
[0011]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an audio
apparatus according to the present invention will be described below with reference to FIGS.
[0012]
First, FIG. 1 shows a circuit configuration in the stored state of the earphone as an example to
which the present invention is applied, and when the storage detection unit b detects that the
earphone g is stored in the earphone storage portion a, The detection signal is input to the
volume control circuit c and the bass amplifier circuit d.
Here, the volume adjustment circuit c is set to the large volume side, the bass amplifier circuit d
is driven, and these signals are input to the audio circuit e.
Then, an audio signal output from the audio circuit e is amplified by the amplifier (AMP) f and
sent to the earphone g, and a sound is emitted from the earphone g.
[0013]
Next, FIG. 2 and FIG. 3 partially show an example of an audio apparatus to which the present
invention is applied, for example, an audio apparatus such as a portable radio and the like. 2 is an
earphone storage unit, 6 is a detection switch, 11 is an earphone, 12 is an earphone cord, and 13
is an earphone cord take-up reel.
[0014]
The earphone housing 2 is integrally formed in the main body case 1 and a detection switch 6
for detecting that the earphone 11 is housed in the earphone housing 2 and the earphone cord
12 of the earphone 11 are taken up. The earphone cord take-up reel 13 is assembled.
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The winding operation of the earphone cord 12 by the earphone cord winding reel 13 is
performed by pressing a winding button (not shown) provided on the outer surface of the main
body case 1.
[0015]
In the illustrated example, in the vicinity of the corner portion in the main body case 1, the
earphone housing portion 2 is integrally formed by a substantially circular recess opening on the
front surface side (see FIG. 4) with the back surface side (lower surface side) 1b as the bottom
surface. There is.
The internal shape of the earphone housing portion 2 is, as shown in an enlarged manner in FIG.
4, a flat sound reflecting surface 3, and the diameter of the substantially circular inner
circumferential surface gradually increases toward the body case surface 1 a. The sound
diffusing portion 4 has a female tapered shape which is enlarged.
[0016]
Then, a plurality of (two in the figure) earphone stoppers 5 and 5 are integrally protruded from
the inner peripheral surface in the inside of the earphone housing portion 2 and, as shown in a
further enlarged view in FIG. A detector 7 for turning on the detection switch 6 installed on the
outside of the part 2 protrudes.
The detection element 7 penetrates the peripheral wall portion of the earphone housing portion
2 and is always urged in the projecting direction by the coil spring 8.
[0017]
Next, the case where the earphones 11 are stored in the above-described earphone storage unit 2
will be described.
In order to store the earphones 11, first, the earphones 11 are set in the earphone storage unit 2
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with the front surface 11 a thereof facing the sound reflection surface 3.
The set state of the earphone 11 is maintained by pressure contact of the earphone stoppers 5
and 5 and the detector 7 on the outer peripheral surface of the earphone 11.
Then, by pressing the winding button (not shown), the earphone cord 12 is wound around the
earphone cord winding reel 13.
[0018]
In the storage condition of the earphone 11 in the main body case 1 as described above, the
detector 7 is pushed by pressure contact with the outer peripheral surface of the earphone 11
and the detector 7 resists the detection switch 6 against the biasing force of the coil spring 8.
Turn on.
When the earphone 11 is taken out, the detector 7 returns to the original projecting state by the
force of the coil spring 8 and the detection switch 6 is turned off. When the earphone 11 is
pulled out, it can be used as a normal earphone 11.
[0019]
Thus, when the detection switch 6 detects that the earphones 11 are in the stored state, the
volume is increased as shown in FIG. 1 and the sound in which the bass is amplified comes out
from the front surface 11 a of the earphones 11. The sound emitted from the front surface 11a
of the earphone 11 is reflected by the sound reflecting surface 3 at the bottom of the earphone
housing 2 as shown by the arrow in FIG. While being discharged to the main body case surface
side 1a. Therefore, without providing a dedicated speaker, the sound of the earphone 11 can be
expanded and used as a speaker while space saving is maintained.
[0020]
Next, a second embodiment of the present invention shown in FIGS. 6 to 10 will be described.
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First, FIG. 6 shows the internal configuration of the earphone 21 used in the second embodiment
of the present invention, and this earphone 21 has a coil 22, a magnet 23, a cone paper 24, a
front surface, as in a normal earphone configuration. A cover 25 or the like is provided. The
operation of the earphone 21 is such that by passing an audio signal to the coil 22, the magnet
23 moves in accordance with Fleming's law, thereby vibrating the cone paper 24 connected to
the magnet 23 to make a sound.
[0021]
The components of the earphone 21 described above are housed, for example, in an earphone
case 26 as shown in FIG. 7, and 27 is an earphone cord. FIG. 7 shows a part of an audio
apparatus to which the second embodiment of the present invention is applied. As in the first
embodiment, for example, an audio apparatus such as a portable radio is shown in FIG. The main
body case 32 is an earphone housing portion, 33 is an earphone stopper, and 35 is main body
side cone paper.
[0022]
In the main body case 31, the earphone housing portion 32 is integrally formed, and a main body
side cone paper 35 and an earphone cord take-up reel (not shown) for winding the earphone
cord 27 of the earphone 21 are assembled. In the illustrated example, the earphone housing
portion 32 is formed integrally with a substantially circular recess opening on the back surface
side (lower surface side in the drawing) 1b in the main body case 31, and a plurality of earphone
stoppers 33 are formed from the inner peripheral surface of the earphone housing portion 32. ,
33 are integrally projected, and an opening 34 of a substantially circular recess is integrally
formed on the surface side 1a so as to face the earphone housing portion 32.
[0023]
The earphone housing portion 32 is also opened on the side of the opening 34, and the main
body side cone paper 35 is attached to the opening 34 by an appropriate means. As shown in
FIG. 8, the main body side cone paper 35 has a small diameter circular base, which is a portion to
be in contact with a magnet in the case of a normal speaker, as the connection end 36. In order
to make contact with the cone paper 24 of the present invention, a plurality of (four in the figure,
four places in the circumferential direction) connection slits 37, 37, 37, 37 are formed. The
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connection end portion 36 is located near the back of the earphone housing portion 32, as
shown in FIG.
[0024]
On the other hand, as shown in FIGS. 9A and 9B, the front cover 25 of the earphone 21 is formed
with a large number of sound leakage holes 25a, 25a, 25a,. Furthermore, around the central
portion of the front cover 25, a plurality of (four in the circumferential direction in the drawing)
arc-shaped connecting holes 28 for contacting with the connection end 36 of the main body side
cone paper 35, 28, 28, 28 are formed.
[0025]
Next, the case where the earphones 21 are stored in the above-described earphone storage unit
32 will be described. In order to store the earphones 21, as shown in FIG. 7, the earphones 21
are set in the earphone storage unit 32 with the front cover 25 facing the main body side cone
paper 35. The set state of the earphone 21 is maintained by pressure contact of the earphone
stoppers 33 with the outer peripheral surface of the earphone case 26. Then, as in the first
embodiment, the take-up button (not shown) is pressed to take up the earphone cord 27 onto the
take-up cord (not shown).
[0026]
In the storage state of the earphone 21 in the main body case 31 as described above, as shown in
FIG. 10, the connection end portion 36 by the small diameter circular base of the main body side
cone paper 35 is 4 by the connection slits 37, 37, 37, 37. Since the front cover 25 of the
earphone 21 is separated, it enters into the through holes 28, 28, 28, 28 of the front cover 25 of
the earphone 21 and comes into contact with the cone paper 24 of the earphone 21.
[0027]
For this reason, when the cone paper 24 of the earphone 21 vibrates and emits a sound, the cone
paper 35 in contact with the cone paper 24 and the connection end portion 36 vibrates, and the
sound of the earphone 21 is amplified.
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Therefore, as in the first embodiment, without providing a dedicated speaker, the sound of the
earphone 21 can be expanded and used as a speaker while space saving is maintained.
[0028]
In the above embodiments, an audio device such as a portable radio is used. However, the
present invention is not limited to this, and other audio devices may be used. Further, the storage
form and storage place of the earphones are also optional, and it is needless to say that other
specific details can be appropriately changed.
[0029]
As described above, according to the audio device of the present invention, the sound output
function unit provided in the earphone storage portion of the device main body is used as a
speaker by expanding the sound of the stored earphone. Can. Therefore, in addition to the use as
the earphone, it can be used as the speaker in the earphone housed state while being space
saving.
[0030]
For example, according to the sound amplification function unit of claim 2, due to the shape of
the earphone housing portion having the sound reflection surface and the sound diffusion
portion, the sound of the earphone is reflected by the sound reflection surface in the storage
state, and the reflection is further performed. Sound can be diffused by the sound diffusion unit.
[0031]
Further, according to the sound output function unit of the third aspect, since the main body side
cone that is connected to the cone paper in the earphone to amplify the sound is provided in the
earphone housing portion, the sound of the earphone can be It can be amplified by vibration.
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