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JPH08336195

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DESCRIPTION JPH08336195
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to
audio equipment such as radio cassettes.
[0002]
2. Description of the Related Art In recent years, a speaker is often disposed on the top surface of
an audio device for the purpose of creating a sound field and improving the directivity of a high
sound portion. And, even in an audio apparatus having a plastic cassette such as a radio cassette,
a speaker is often disposed on the top surface in order to improve directivity.
[0003]
Heretofore, most of audio devices having a plastic cabinet are configured to be able to divide the
cabinet into upper and lower cabinets, and to provide bosses on the upper cabinet to screw the
speaker. Therefore, the dividing lines of the upper and lower cabinets can be seen from the front
of the audio equipment, which is not preferable in design. In addition, parts which are
undesirable in appearance such as sink marks generated at the time of plastic molding will be
visible.
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1
[0004]
Furthermore, when a panel, an operation button, etc. are attached to the front of an audio device,
there is a problem that it is difficult to manufacture a molding die of the cabinet in the structure
where the cabinet is divided into upper and lower cabinets.
[0005]
Also, in the configuration where the high frequency range speaker is disposed on the top surface
and the low frequency range speaker is disposed on the front surface of the audio equipment, the
mounting member for attaching the low frequency range speaker on the dividing line of the
upper and lower cabinets is integrally configured with the cabinet. I can not
[0006]
Also, in order to arrange the high frequency range speakers on the top surface of the audio
equipment and the low frequency range speakers on the front surface so that the sounds of the
respective speakers do not interfere with each other, the backs of the respective speakers are in
the cabinet It is necessary to seal.
In the case of a structure in which the cabinet is divided into upper and lower halves, it is difficult
to make the back of the speaker a sealed structure for the purpose described above. For example,
the upper and lower halves of the cabinet are not preferable in terms of acoustic performance.
[0007]
SUMMARY OF THE INVENTION The conventional problem to be solved by the present invention
is that, in an acoustic apparatus having speakers on the top surface and the front surface,
cabinets with upper and lower halves are preferable in terms of acoustic performance and
design. There is no such thing.
[0008]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a configuration
that can easily assemble a cabinet that is preferable in terms of acoustic performance and design.
[0009]
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2
The invention according to claim 1 relates to a cabinet formed by coupling a front cabinet and a
rear cabinet, and a hole formed by facing a notch on a dividing line on a top surface of the
cabinet. And a cylindrical cover fitted in a cover insertion hole provided at the bottom of the
recess, and a lid fitted in the cylindrical cover and fitted at the top of the hole A top speaker and
a front speaker provided on the front of the cabinet are provided.
[0010]
In the invention according to claim 2, in the invention according to claim 1, the lid has a top
surface and a side wall fitted in the hole of the cabinet, and a part of the top surface and the side
wall A through hole is provided over a portion, and a top surface net is attached to the through
hole, and the through hole faces the front and the side of the acoustic device.
[0011]
In the invention according to claim 3, in the invention according to claim 1 or 2, a diffuser is
disposed between the lower part of the lid and the top speaker.
[0012]
In the invention according to claim 4, in the invention according to any one of claims 1 to 3, the
front speakers are provided on the partition in the vertical direction in the cabinet, the wall of the
cabinet, and the top face of the cabinet It arrange | positions in the sealed space comprised by
the side wall and bottom face of a dent, and the cylindrical cover fitted to the said bottom face.
[0013]
The invention according to claim 5 is the invention according to any one of claims 1 to 4, which
covers the dividing line of the top surface of the cabinet, and the tape cassette insertion portion
and the operation button between two lids. Is provided.
[0014]
In the invention according to claim 6, the top speaker of the invention described in any of claims
1 to 5 is a speaker for middle to high frequency range, and the front speaker is a speaker for low
frequency range. .
[0015]
[Operation] According to the above configuration, the dividing line of the cabinet can not be seen
from the front of the acoustic device, and the back of the top speaker is covered, and the entire
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top speaker is in the sealed space. There is no interference with the sound.
[0016]
According to the second aspect of the invention, in addition to the above-mentioned function, the
sound from the top speaker is radiated in the front direction and the side direction of the
acoustic device.
[0017]
Further, in the invention according to the third aspect, in addition to any one of the abovementioned actions, there is an action of diffusing the sound of the top speaker.
[0018]
Further, in the invention according to claim 4, in addition to any of the above-mentioned
functions, the sound of the front speaker does not interfere with the sound from the top speaker
in the audio equipment.
[0019]
Moreover, in the invention according to claim 5, in addition to any of the above-mentioned
functions, the dividing line of the top surface is covered, and there are few dividing lines visible
from the upper surface.
[0020]
In the sixth aspect of the present invention, the sound in the middle to high range from the top
surface of the acoustic device is emitted in the low range from the front surface, and the sound
effect is good.
[0021]
An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a radio cassette audio device, and a cabinet 2 made of
plastics is configured by combining a front cabinet 2a and a rear cabinet 2b, and a dividing line 3
is formed between the front and rear cabinets 2a and 2b. Is formed.
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A front net 4 is provided on the front of the audio device 1 for emitting a low range to the left
and right respectively.
In addition, on the top surface of the audio device 1, a top surface net 5 that radiates middle and
high frequency ranges to the left and right is provided.
A front speaker 6 for the low frequency band is disposed in a through hole of the acoustic device
1 at the back of the front net 4, and a top speaker 7 for the middle to high frequency band is
disposed below the top surface net 5.
The lid 9 having the side wall 8 is provided on the top surface of the top speaker 7 provided on
the top surface, and the notch 10 of the front cabinet 2a and the notch 11 of the rear cabinet 2b
are provided on the parting line 3 respectively. And the side wall 8 is fitted in the hole 12 formed
by
The top surface net 5 is provided on a part of the upper surface of the lid 9 and a part of the side
wall 8 in the formed through hole as shown in FIG. 1 (b).
Accordingly, the middle and high tone range from the top speaker 7 is radiated to the front
direction and the left and right side surface directions of the acoustic device 1 through the top
net 5.
[0022]
The top speaker 7 is covered by a cylindrical cover 14 having a bottom surface 13 and an open
upper surface, and the side wall of the cylindrical cover 14 has a step 15.
A small hole 16 is provided in the upper side wall of the step portion 15.
The cylindrical cover 14 has the top edge of the top speaker 7 fixed between the upper end
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collar 17 and the lower end edge 9a of the lid 9 with a screw 17a, and the rib 15a provided on
the step 15 is a front cabinet It is attached to the periphery of the cover insertion hole 19 at the
bottom 18a of the recess 18 below the hole 12 formed by the respective notches 10 and 11 of
the rear cabinet 2b and the rear cabinet 2b.
[0023]
Therefore, the bottom 18a of the recess 18 divides the inside of the cabinet 2 up and down, so
that the sounds from the front speaker 6 and the top speaker 7 do not interfere with each other,
the back of the front speaker 6 and the top speaker 7 Front and top speakers 6, 7 are disposed in
separate closed spaces 20a, 20b, respectively, separately from the back.
A diffuser 21 is disposed on the upper surface of the top speaker 7 and on the lower surface of
the lid 9 to diffuse the middle to high frequency range from the top speaker 7 around.
The reference numeral 22 denotes a partition provided longitudinally in the front and back
direction in the cabinet 2. A sealed space 20a is constituted by the bottom 18a and the side 18b
of the recess 18 described above.
[0024]
Reference numeral 23 denotes a through boss, 24 denotes a tape cassette insertion portion
provided on the top surface of the audio device 1, and 25 denotes an operation button, which is
disposed between the left and right lids 9 of the top surface and the dividing line 3 is I try not to
stand out.
[0025]
Hereinafter, how to assemble and operational effects of the acoustic device 1 configured as
described above will be described.
[0026]
Since the cabinet 2 is assembled by combining the front cabinet 2a and the rear cabinet 2b, it is
easy to assemble and there is no possibility that the dividing line can be seen on the front of the
acoustic device as seen in the conventional example of dividing into two.
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[0027]
Further, the lid 9 covering the upper part of the top speaker 7 fits the side wall 8 thereof into the
hole 12 formed by the notch of the front cabinet 2a and the notch 11 of the rear cabinet 2b
facing each other. The dividing line 3 is not noticeable even when viewed from the upper surface
of the acoustic device 1.
Therefore, it is preferable in design.
[0028]
The top speaker 7 is disposed in the cylindrical cover 14 inserted in the cover insertion hole 19
of the bottom 18 a of the recess 18 formed by the hole 12 of the cabinet 2, and the lower end
edge 9 a of the lid 9 and the cylindrical Since the upper peripheral edge of the top speaker 7 is
welded by the upper end collar portion 17 of the cover 14, the mounting is easy.
[0029]
In addition, the back of the top speaker 7 is covered with the cylindrical cover 14 and the whole
is surrounded by the side 18b of the recess 18 and the bottom 18a, so that it is disposed in the
sealed space 20b. There is no interference at all, and the acoustic characteristics are good.
Of course, the front speaker 6 is disposed in the enclosed space 20 a formed by the partition 22,
the side wall of the cabinet 2 and the bottom 18 a of the recess 18 in the cabinet 2 and does not
interfere with the sound of the top speaker 7. Good characteristics.
[0030]
Further, a portion provided with the tape cassette insertion portion 24 and the operation button
25 on the top surface of the audio device 1 is more preferable in design because the visual
observation of the dividing line 3 is reduced.
[0031]
As is apparent from the above description, since the acoustic device of the present invention has
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a cabinet formed by combining the front cabinet and the rear cabinet, the dividing line is on the
top surface and can not be seen from the front. Preferred in design.
[0032]
In addition, a lid covering the top of the top speaker is disposed on the dividing line on the top
surface, and the dividing line becomes inconspicuous.
Moreover, the top speaker is configured to be easily inserted from the top into the recess formed
in the top surface of the cabinet, and is disposed in the sealed space formed by the cylindrical
cover and the bottom of the recess. It is isolated from each other, has no sound interference with
each other, and has good acoustic characteristics.
[0033]
Brief description of the drawings
[0034]
FIG. 1A is a front view of an audio device according to an embodiment of the present invention
[0035]
Fig. 2 An enlarged cross-sectional view of the main part of the acoustic device half cut along line
A-A in Fig. 1 (a) as viewed from the rear in the right direction
[0036]
3 is an enlarged sectional view of the main part in the direction of arrows B-B in FIG. 1 (b)
[0037]
Explanation of sign
[0038]
Reference Signs List 1 audio equipment 2 cabinet 2a front cabinet 2b rear cabinet 3 division line
6 front speaker 7 top speaker 8 side wall 9 lid 10, 11 notch 12 hole 14 cylindrical cover 18
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recess 18a bottom 19 cover insertion hole 20a, 20b sealed Space 21 Diffuser 22 Bulkhead 24
Tape cassette insertion part 25 Operation button
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