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JPS60198996

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DESCRIPTION JPS60198996
[0001]
The present invention relates to a stereo sound reproducing apparatus provided in an audio
device such as a tape pre-coater or a tape recorder with a razor, and in particular, a stereo sound
system in which left and right speaker housings are detachably mounted on an audio device
body. The present invention relates to a playback device. <Background art and its problems>
Conventionally, as a stereo sound re-apparatus provided in an audio apparatus such as a portable
tape recorder, when carrying the above audio apparatus or when the number of listeners is small,
etc. The left and right speaker housings are integrally attached to the main body of the audio
device so as to obtain the above-mentioned functionality at the time of carrying and to be
suitable for a small number of listeners, while a large number of listeners of the audio device
There is known one that is configured to give a high sense of reality to a large number of
listeners by removing the left and right speaker housings from the audio device main body and
taking a large spacing between the speakers. ing. By the way, as described above, in the case of
an audio device in which the valley speaker housing is attached to the audio device main body at
the time of portability, a suitable shape balance between each speaker housing and the audio
device main body is obtained. In order to obtain functionality, the speaker housing needs to be
compact. However, when the spill force housing is configured in a small size, there is a
disadvantage that the reproduction characteristic of the low range of the speaker is deteriorated.
Therefore, in such a portable audio device, when the speaker housing is assembled to the audio
device main body, the valley speaker housing is removed from the sound 1 device main body,
and the arrangement interval of each speaker is removed. It is difficult to obtain a suitable sound
effect even when the <Object of the invention> Therefore, in view of the above-mentioned
situation, the present invention removes the left and right speaker housings detachably provided
in the audio device main body from the audio device main body when several words are
separated from the audio device main body. The present invention provides a stereophonic
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sound reproducing apparatus capable of obtaining good low-pitched sound reproduction
characteristics when both are placed apart from each other, and the functionality and acoustics
of the sound equipment provided with this sound reproducing apparatus. The purpose is to
improve the effect. <Summary of the Invention> That is, in order to achieve the above-mentioned
object, the present invention allows each of the left and right expandable and retractable speaker
housings to be detachably attached to the main body of the acoustic device. With the speaker
housing attached, the left and right speaker housings are in a contracted state, so that the left
and right speaker housings can communicate with each other through a communication portion
provided in the audio device main body.
<Embodiments> Specific embodiments of the present invention will be described in detail with
reference to the drawings. In this embodiment, as shown in FIG. 1, the stereophonic sound
reproducing apparatus according to the present invention is provided, for example, in a portable
audio equipment such as cascent tape recorder. In this stereophonic sound reproducing
apparatus, as shown in FIG. 1 (a), the left and right speaker housings 1 and 1 are assembled to
the main body 2 of the audio device when carrying the audio device and when the number of
listeners is small. In the case where the functionality when carrying and the stability when being
placed are to be obtained, and when the above-mentioned listeners reach a large number of
people, etc., as shown in FIG. 1 (b), the left and right speakers By removing the housings 1 and 1
from the above-mentioned audio equipment main body 2 and separating the left and right
speaker housings 1 and 1 from each other, a high presence can be provided to a large number of
listeners. The audio device main body 2 is provided with, for example, a cassette holder g3 for
mounting a tape cassette, various operation switches 4, 5.6 and the like on its front surface and a
grip ? for portable use at the top of the 10. Then, as shown in FIG. 2, for example, a pair of
holding pieces 8 and 9 for detachably attaching the speaker housings 1 and 1 are provided on
both side portions of the audio device body 2 respectively. . Furthermore, on the back side in the
audio device body 2, when the above-mentioned speaker housings 1 and 1 are attached to the
audio device body 2, the communication portion 10 for connecting the speaker housings 1 and 1
is provided. Et al Jl. The communication portion 10 is also provided, for example, as a battery
storage chamber for storing the plurality of batteries 11 stored in the audio device main body 2,
and is for fixing the respective batteries 11 and these batteries in the storage chamber. The
through holes 15.degree. Provided in the left and right side plates 13 and 14 of the acoustic
device main body 2 are communicated with each other by the gaps of the elastic bodies 12 and
the like. The valley through holes 15, 15 are formed at positions corresponding to through holes
17, 17 described later provided in the speaker housings 1, 1 which are butted against the side
plates 13, 14 of the audio device body 2, When the speaker housings 1 and 1 are attached to the
acoustic device main body 2, the speaker housings 1 and 1 communicate with the
communication unit 10. Further, on the front side of the audio device main body 2, a cassette
storage portion 19 for storing the tape cassette 18 is formed, and in the middle portion between
the cassette storage portion 19 and the battery storage chamber, a reproduction circuit etc. The
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printed circuit board 16 is arranged. Then, the communication section 10 in the battery storage
room is made acoustically sealed in portions other than the through holes 15, 15 by the back
side plate 20, the partition plate 21 and the like of the acoustic device main body 2. ing.
The left and right speaker housings 1, 1 attached to the acoustic device main body 2 configured
in this way have, for example, the main hook portion 24 and the auxiliary hook portion 25
engaged closely with each other. is there. Each of the main flanges 24 has a front plate 27
provided on the front surface of a rectangular cylindrical portion 26 that constitutes the upper
and lower side plates and the left and right side plates of the speaker housing 1. A speaker 28 is
attached to the front side plate 27 from the inside thereof, and a plurality of sound emission
holes 29 formed corresponding to the speaker 28 are provided. Then, for example, on the left
side plate of the main recess 24 of the right side speaker housing 1 to be in contact with the
sound equipment main body 2, as shown in FIG. 3, the sound equipment main body 2 and the
speaker housing 1 When the holding piece 8 ░ 9 engages with the engaging portion 22, the
abutting surfaces, ie, the right side plate 14 of the acoustic device main body 2 and the left side
plate of the main recess 24 closely contact each other. It is supposed to be joined. A through hole
17 is formed in the left side plate of the main recess 24 so as to face the through hole 15 formed
in the right side plate 14 of the acoustic device body 2. Then, the main recess 24 of the left
speaker housing 1 is, similarly to the name, a pair of holding pieces 8 and 9 provided on the left
side plate 13 of the acoustic device main body 2 on the left side plate contacting the audio device
main body 2 A holding portion 22 to be engaged is provided, and the holding portion 22 is in
close contact with and joined to the left side plate 13 of the sound device body 2, and is fitted
into the through hole 4 formed in the left side plate 13 The back side plate 30 is provided on the
back of the rectangular cylindrical portion 29 inserted into the rectangular cylindrical portion 26
of the recess 24. At the front end portion of the rectangular cylindrical portion 29 of the
auxiliary tray portion 25, a fitting stepped portion 31 which is slidably fitted closely to the inner
wall surface of the rectangular cylindrical portion 26 of the main recess 24 is formed. Further, at
the rear side opening of the rectangular cylindrical portion 26 of the main concave portion 24, a
fitting stepped portion 32 which is closely fitted slidably on the outer wall surface of the
rectangular cylindrical portion 29 of the auxiliary plate portion 25 is formed. The auxiliary plate
portion 25 configured in this manner is movable relative to the main recess 24 in the direction
from the front to the back as shown in FIG. It can be projected to the back side to a position
where they engage with each other. Thus, the speaker housings 1 and 1 are telescopic, and the
internal space thereof can be expanded to, for example, about 1.5 times during reduction.
Furthermore, a through hole 33 is formed in the side plate portion of the auxiliary plate portion
25 so as to substantially face the through hole 17 formed in the main recess 24.
The through hole 17 and the fitting step 32 of the main recess 24 and the through hole 33 and
the fitting step 31 of the auxiliary plate 25 are formed close to each other, so that the speaker
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housing 1 is reduced. At the same time, when the above-mentioned through holes 17 and 33
communicate with each other and the above-mentioned speaker housing 1 is expanded, as shown
in FIG. And are shielded from each other. Therefore, in the speaker housing 1, the auxiliary plate
portion 25 is pushed into the main recess 24, and in a state where the speaker housing 1 is
contracted, the sealed state of the speaker housing 1 is determined by the valley through hole
17.33. While being released, the auxiliary plate portion 25 is pulled out from the main recess 24
and the inside of the speaker housing 1 is placed in a sealed state in a state where the speaker
housing 1 is contracted. In the speaker housing 1 configured in this manner, a pair of notched
recesses 34. 34 are formed at the edge of the back opening of the main recess 24. The main
recess 2! The above-mentioned complementary portion 25 pushed into the cylinder 4 is gripped
and can be easily pulled out. A stopper 35 made of a rubber material or the like for positioning
the auxiliary plate portion 25 and for buffering is attached to the inner curved surface portion of
the main concave portion 24. Further, the lead wire 36 of the speaker 28 forms an insertion hole
37 in the back plate 30 of the auxiliary tray 25, and is fixed to the auxiliary tray 25 by, for
example, an annular rubber pad 38 attached to the insertion hole 37. Through the rubber
packing 38, and is connected to the connection portion 39 provided on the back of the acoustic
device main body 2, and the speaker housing 1 is maintained in a sealed structure by the rubber
packing 38. ing. When the speaker housings 1 configured as described above are attached to the
audio device main body 2 in a contracted state, the internal space of the speaker housings 1 1
has the through holes 15, 17.33. The internal space of each of the speaker housings 1 and 1 is
not in communication with each other through the communication portion 10. Accordingly, the
acoustic space of the speakers 28.28 is greatly expanded, and the bass range reproduction
characteristics of the speakers 28.28 are improved. Since the speaker housings 1 and 1 are in
communication with each other, the speakers 28 and 28 function as a drone cone, and the abovementioned bass range reproduction characteristics are further improved. In addition, when the
speaker housings 1 and 1 are removed from the entire audio device 2 and the auxiliary rotating
portions 25 are pulled out from the main collars 24, the speaker housings 1.1 are located on the
through holes 17. , 23 are shielded and placed in a closed state, and the internal space thereof is
expanded.
Therefore, even in this state, good bass reproduction characteristics of the spill force 28.28 can
be obtained. As described above, in the audio equipment provided with the stereophonic sound
reproducing apparatus of the present embodiment, in a state where the respective speaker
housings 1 ░ 1 are attached to the audio equipment main body 2, these speaker housings 1 and
1 are placed in a contracted state. The audio device as a whole has a compact shape and can be
freely mounted on a small space, while providing free functionality when carrying. Then, when
such speaker housings 1 and 1 are reduced and brazed to the audio device main body 2, the
speaker housings 1 and 1 are detached from the audio device main body 2 and placed apart from
each other. In both cases, good bass characteristics of the speaker 28.28 can be obtained, and
high quality sound reproduction can be performed. In addition, this invention is not limited to the
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embodiment excavated, For example, the said communication part 10 is provided in parts other
than a battery storage room, etc. various deformation according to the form of the sound qlI
apparatus to which this invention is applied. Is possible. As is clear from the description of the
embodiments described above, according to the present invention, when the left and right
speaker housings are attached to the acoustic device main body, these speaker housings are in
the contracted state. When the speaker housings on the left and right are removed from the main
body of the sound device by placing the speaker housings in the extended state, the speaker
housings are placed in the extended state. Therefore, in both of these cases, good bass
characteristics of the speaker can be obtained, high quality sound reproduction can be realized,
and a large speaker housing can be used to perform such high quality sound reproduction. It can
also be resolved that the increase in the size of the acoustic device in the case of being provided
is caused.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a front view of an acoustic device to which the present invention is applied, and FIG. 1
(a) shows a state in which the left and right speaker housings are several phrases in the sound M
unit body; These show the state which removed said each speaker housing from the said audio
equipment main body.
FIG. 2 is a schematic cross-sectional view of the audio device in a state where the abovementioned speaker housings are attached to the above-mentioned audio device main body, and
FIG. 3 is a rear external perspective view showing the speaker housing in a contracted state. The
figure is a rear appearance side perspective view showing the speaker housing in an extended
state, and FIG. 5 is a partially omitted sectional view showing the audio device in a state in which
the speaker housing is removed from the audio device main body. 1.1 иииииииииииииииииииииииииииииииииииииииииииии
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?24 ииииииииииииииииииииииииииииииииииииииииииииииииииииииии Atsushi Patent Applicant Nony Co., Ltd. Attorney Attorney
Koike 1) Village Atsushi-
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