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JP2002027588

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DESCRIPTION JP2002027588
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
panel type speaker system in which an exciter for driving these diaphragms is interposed
between a pair of flat diaphragms disposed opposite to each other in front and back. .
[0002]
2. Description of the Related Art Conventionally, a large number of advertising / guidance display
boards have been installed in stores or in stores such as supermarkets and home improvement
centers, and customers can receive them by characters, illustrations, photographs, etc. displayed
on these display boards. Promotion of goods etc. is being carried out. At the same time, it is
common for broadcast speakers to be installed everywhere in the store, and various products are
advertised by voice announcement.
[0003]
By the way, these voice announcements are normally broadcasted simultaneously in the entire
store or on each floor, and it is necessary for customers who are in the vicinity of the place where
the display board is installed. On the other hand, the product displayed on the display board is
not announced in real time, and the content displayed on the display board and the content to be
announced do not match.
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[0004]
In addition, in the case of promoting the handling product at each store such as a shopping
street, the advertisement by the voice announcement using the advertisement / guidance display
board in the store and the voice reproduction device installed in the vicinity or in the store
However, if voice announcements are made with these audio playback devices, the contents are
not easily heard by the customers located far away, and the announcements are felt so loud for
the customers in the vicinity of the speaker, and the customer attraction effect is negative. There
was a side to become.
[0005]
The present invention has been made in view of the present state of the art, and it emits clear
audio signals on all sides, and can naturally hear the contents without discomfort from any place,
as an advertisement / guidance display board. It is an object of the present invention to provide a
panel type speaker system which can also be used.
[0006]
[Means for Solving the Problems] The present inventors diligently studied to solve the problems,
and first focused on a panel speaker having nondirectional and clear acoustic characteristics.
As for the panel speaker, for example, Japanese Patent Application Laid-Open No. 2000-36997
discloses a panel speaker formed by fixing an exciter provided with a voice coil and a magnetic
circuit on the back surface of a flat diaphragm. The mounting structure of a panel type speaker is
disclosed by 10-243491 gazette.
The present invention relates to a speaker for attaching to an electronic device which is
becoming smaller and thinner in recent years, and the inventor of the present invention is further
suitable for listening by adding further ingenuity to these panel speakers, as an advertisement /
guiding display board We conceived a panel-type speaker system that could also be used.
[0007]
The panel-type speaker system of the present invention completed based on such an idea has the
following contents.
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That is, a bobbin portion on which a voice coil is wound in the exciter, comprising: a pair of flat
plate-like diaphragms disposed opposite to each other in front and rear, and single or plural
exciters interposed between the diaphragms; A magnetic circuit portion in which a magnetic gap
in which a voice coil is inserted is formed is fixed to a part of the inner surface of each
diaphragm. In such a panel-type speaker system, a clear acoustic signal is emitted from the front
and rear flat diaphragms in a non-directional manner, and the content can be naturally heard
without discomfort at any place. Since the exciter is concealed in the internal space between the
diaphragms, both the front and rear diaphragm outer surfaces can be used freely as a display
surface, and the exciter is protected from external impact by the diaphragm, so A break or
breakage of the terminal can be avoided, and a waterproof structure can be achieved extremely
easily.
[0008]
Here, in the case where the diaphragm is formed by sandwiching a core material of a honeycomb
structure between two surface layer vibrating members disposed opposite to each other in the
inside and outside, a high frequency of about 400 Hz to about 8000 Hz is particularly high. The
sound range is clearly output around the speaker system without causing howling, and it is
particularly suitable for voice guidance, and the 8 to 10 w amplifier device exhibits the same
capability as a 200 w loudspeaker. This is an application of the DM panel speaker technology
developed by New Transducer Limited (NXT) in the United Kingdom, which has bi-directionality
and realizes flat frequency characteristics in the middle and high frequencies, A large radiation
area can be obtained because fine divided vibrations occur in the diaphragm, and the sound
pressure level can be maintained even if the diaphragm is separated, and sufficient energy can be
obtained.
[0009]
Further, of the plurality of exciters interposed between the pair of diaphragms, the bobbin
portion is fixed to the inner surface of the front diaphragm of at least one, and the bobbin portion
is fixed to the inner surface of the rear diaphragm at least one. It is more preferable that the front
and rear diaphragms are directly driven by the bobbin portion of the exciter.
[0010]
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If an amplifier for supplying a drive current to the exciter is interposed between the pair of
diaphragms, the connection operation is simplified, and the user can appropriately use it,
particularly when using it as a placard to be described later. It is possible to adjust the volume
etc. and it is convenient.
The reason why the amplifier can be attached to the limited space between the diaphragms in
this way is because the panel type speaker system of the present invention can maintain a
sufficient sound pressure level with a small-power small amplifier.
[0011]
Then, if an information display surface for advertisement or guidance is formed on both outer
surfaces of the diaphragm, the panel type speaker system functions as an advertisement
signboard, an election placard, etc., and the customer or the public sees Since voices are directly
emitted from these signboards and placards, it is possible to more effectively appeal or recognize
goods or other advertising information by information linked to each other for both viewing and
listening.
[0012]
Here, in the case where a recording medium in which audio information for advertisement or
guidance is stored is interposed between the pair of diaphragms, it is not necessary to connect a
reproduction device etc. from the outside separately, and it is used The range of forms can be
expanded.
[0013]
Further, a frame for holding the four sides of the diaphragm is provided, and a holding member
for pressing and holding a poster for advertising or guidance brought into contact with the outer
surface of the diaphragm along the outer surface of the frame can be opened and closed. And the
holding member is brought into contact with the outer surface of the frame by the magnetic
attraction force of the magnet provided on the inner surface side, whereby the pressure holding
posture is maintained by opening and closing the holding member. The poster can be easily set
or changed on the outer surface.
[0014]
Further, if a whiteboard is formed on one outer surface of the diaphragm and a projection
surface of a projector is formed on the other outer surface, the description regarding characters,
figures, etc. drawn on the whiteboard is directly from the board. Further, since the information
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related to the content emitted and projected on the projection surface is directly emitted from the
projection surface, it is possible to more effectively recognize the content by the information
linked to each other for both of the viewers.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention
will be described in detail with reference to the attached drawings.
[0016]
FIG. 1 is a partially broken perspective view showing a panel type speaker system according to
the present invention, and FIGS. 1 to 12 show a first embodiment, FIG. 13 shows a second
embodiment, and FIG. 14 shows a third embodiment. In the figure, reference numerals 2F and 2R
in the drawings denote diaphragms respectively provided on the front and rear sides, and 3
denotes an exciter for driving these diaphragms.
[0017]
The panel type speaker system 1 of the present invention, as shown in FIG. 1, includes a pair of
flat diaphragms 2F and 2R disposed opposite to each other in the front and back direction, and
between the diaphragms 2F and 2R. The bobbin section 30 applies vibration to the front
diaphragm 2F, and the magnetic circuit section 2R applies vibration to the rear diaphragm 2R.
An omnidirectional, clear acoustic signal is emitted from the diaphragm so that the content can
be heard naturally without discomfort from any place, and the exciter 3 is concealed in the
internal space between the diaphragms 2F and 2R. Therefore, both the front and rear diaphragm
outer surfaces can be used freely as a display surface, and since the exciter 3 is protected from
external impact by the diaphragm, breakage of lead wires and breakage of terminals can be
avoided. Structure is also being very easily achieved.
[0018]
First, a panel-type speaker system 1 according to a first embodiment of the present invention will
be described based on FIGS.
[0019]
The exciter 3 mounted between the diaphragms 2F and 2R is wound around a bobbin 30 as
shown in FIG. 2, and vibration is mainly transmitted to the diaphragm 2F by piston motion
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through the bobbin 30. The bobbin portion 30 and the magnetic circuit portion 32 forming the
magnetic gap 32a are provided with the voice coil 31 to be applied and the magnetic gap 32a
into which the voice coil 31 is inserted, and each of the diaphragms 2F is provided. , 2R is fixed
to a part of the inner surfaces 2a and 2b using a double-sided tape 9.
The structure of the permanent magnet and the yoke constituting the magnetic circuit portion 32
and the relationship between them are the same as the magnetic circuit of the conventional
exciter, and in this example, the bobbin portion 30 on which the voice coil 31 is wound is
vertically An external magnet type magnetic circuit in which a ferrite pole piece is provided and a
ferrite magnet is provided around it via a magnetic gap 32a is provided, but other structures and
an internal magnetic type magnetic circuit are also natural Can be adopted.
[0020]
As the diaphragms 2F and 2R driven by the exciter 3 to emit acoustic signals, those having the
same outer size and rectangular outer shape are used, and each diaphragm 2F (2R) is also shown
in FIG. In addition, a lightweight, high-rigidity diaphragm is used in which a core material 20 of a
honeycomb structure is sandwiched between two film-like surface layer vibration members 21
disposed opposite to each other in the front and rear direction. .
It is preferable to use a material with high hardness and excellent impact resistance such as
carbon and Kepler for the surface layer vibrating member 21, and it is preferable to use
lightweight aluminum for the core material 20, but depending on the use mode, paper. Naturally,
it is also possible to use fibers and other materials for each part.
The diaphragm used in the present invention is not limited to one having such a honeycomb
structure, and a synthetic resin board or veneer board can be used as one or both of the front
and rear diaphragms. However, as shown in FIG. 4, the one obtained by integrally molding the
surface layer vibration members 23, 23 on the outer surface of the foam layer 22 is also
preferable in that it is light in weight and high in rigidity and excellent acoustic characteristics
can be maintained. In addition, when illumination means such as a fluorescent lamp is provided
in the internal space surrounded by the diaphragms 2F and 2R and one or both of the
diaphragms on which the information display surface is formed are illuminated from the inside,
the diaphragm is transparent as the diaphragm Alternatively, it is preferable to use a milk white
acrylic plate or the like.
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[0021]
The diaphragms 2F and 2R are respectively fixed to the front and back of the frame 4 connected
or integrated in a frame shape, thereby driving the diaphragms 2F and 2R to the internal space
closed by the frame 4 A panel-type speaker system 1 equipped with an exciter 3 is configured.
As described above, the exciter 3 mounted between the diaphragms in the frame 4 may be
provided singly or in plurality depending on the shape, size, etc. of the diaphragms 2F and 2R,
and in particular, when a plurality of exciters 3 are provided, FIG. As shown in the figure, at least
one exciter 3A has the bobbin 30 fixed to the inner surface 2a of the front diaphragm 2F, and at
least one exciter 3B has the bobbin 30 fixed to the inner surface 2b of the rear diaphragm 2R.
However, it is preferable in that both the diaphragms 2F and 2R are directly driven by the bobbin
portion 30.
The magnetic circuit portions 32, 32 of the exciters 3A, 3B in this case do not necessarily have to
be fixed to the opposed diaphragm inner surfaces 2b, 2a.
[0022]
At the lower part of the frame 4, a jack 51 as a drive current supplying means electrically
connected to the voice coil 31 through the lead wires 5a, 5b, 5c, 5d and the terminal 50 is
opened on the outer surface of the frame. The voice coil 31 is supplied with a drive current by
inserting an input plug 52 at the tip end of the cord extended from an external amplifier device.
Note that the installation location of the current supply means such as the jack 51 is
appropriately set according to the use form of the speaker system 1, and for example, when used
as a pendant advertising billboard 10B to be described later suspended from a ceiling Preferably,
it is provided at the top of the
FIG. 6 vibrates the general-purpose amplifier device 6 provided with a control function of
selecting, mixing, or amplifying the signal of the program source and adjusting the level, and a
power amplification function of obtaining a driving power by amplifying the controlled signal.
The modification of this invention built in the frame internal space between boards is shown, The
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site | part which faces the outer surface of the flame | frame 4 in this amplifier apparatus 6 The
commercial current from various adjustment knobs and an external power supply, an external
audio | voice output apparatus The jack etc. which are not illustrated in which the signal from is
input are provided.
Here, it is preferable that an audio chip, which is a recording medium, be similarly incorporated
in the internal space as the program source, and these audio chips display an advertisement
displayed on the information display surface of the outer surface of the advertising billboard 10
configured with the speaker. The voice information related to the guidance is stored in advance.
In addition, a battery is similarly incorporated in the internal space as a power source of the
built-in amplifier device 6, or a solar cell panel for charging the battery is further provided on the
upper surface of the frame 4 in the case of outdoor use Is also a preferred embodiment.
[0023]
FIGS. 7 and 8 show an advertisement sign according to the present embodiment in which
information display surfaces 7 for advertising are formed on the outer surfaces of both of the
diaphragms 2F and 2R in the panel type speaker system 1 described above. FIG. 7 shows a
placement type advertising signboard 10A installed in a store or a shop front, and FIG. 8 mainly
shows a pendant type advertising signboard 10B hanging from the ceiling of the store. In the
placement type advertising signboard 10A, a seal packing is interposed between each diaphragm
and the frame 4, and a waterproof structure is provided so that it can be used outdoors. In
addition, a sensor 60 for detecting a customer approaching through the aisle is provided on the
pendant type advertising signboard 10B provided on the aisle ceiling, and if it receives a signal
from the sensor 60, it vibrates with the exciter. By driving the boards 2F and 2R, the
advertisement information of the built-in voice chip is transmitted to the customer by voice. In
any case, since voices are directly emitted from the diaphragms 2F and 2R before and after
forming the information display surface 7, it is effective for the customer who looked at the
information by information linked to each other in both audibility and sighting. Products and
other promotional information.
[0024]
FIG. 9 shows a more specific embodiment of the pendant type advertising billboard 10B, which
comprises holding frames 42 and 42 for holding the four sides of the front and rear diaphragms
2F and 2R, respectively, and holding these front and rear It has a structure in which the frames
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42, 42 are connected to each other by a side plate 41. Further, each holding frame 42
constituting the frame 4 is a plate as a holding member for pressing and holding the edge
portion of the poster 70 and the transparent cover 71 which are in contact with the outer surface
side of the diaphragms 2F and 2R along the outer surface thereof. The opening and closing frame
43 is provided so as to be openable and closable, and a magnet 43a provided inside the opening
and closing frame 43 is brought into contact with the holding frame 42 to maintain a pressing
and holding posture in which the poster 70 is pressed. In the internal space between the
diaphragm 2F and the diaphragm 2R closed by the holding frame 42 and the side plate 41, as
described above, the exciter, the amplifier and the voice chip are embedded and provided at the
lower end of the advertising billboard 10B. When the heat detecting sensor 60 detects the
presence of a passerby, the advertisement information stored in advance in the voice chip is
voice-outputted via the diaphragms 2F and 2R. In addition to the auxiliary input jack 64
connected to the amplifier and the volume control knob 63 on the side plate 41 as shown in the
circuit configuration diagram of FIG. 11, a recording tape for storing the program source in the
recording circuit of the audio chip. An input jack 65a, a recording microphone input jack 65b, a
recording start switch 66 for starting the recording, and the like are provided.
[0025]
FIG. 12 shows an embodiment of a panel-type speaker system configured as a wall-mounted
advertising billboard 10C, and the information display surface 7 is not formed on the rear side
which is the wall-side facing surface 70, The diaphragm 2R also has no honeycomb structure.
The other structure is the same as that of the above-mentioned pendant type advertising
signboard 10B, so the same reference numerals are given to the same structure and the
description thereof is omitted.
[0026]
Next, FIG. 13 shows a second embodiment of the present invention, in which information display
surfaces 7 for advertising are formed on the outer surfaces of both of the diaphragms 2F and 2R
in the panel type speaker system 1 described above, An election placard 11 is configured by
providing a grip bar 40 from the lower part of the frame 4. An amplifier device and a tuner
having an adjustment knob facing the outside are provided inside the placard 11, and a user
holding the placard 11 or a holding rod 40 is a portable battery for supplying power to the
amplifier device 61 is mounted, and the user's voice signal transmitted from the wireless
microphone 62 is selected by the tuner, amplified by the amplifier device, and an acoustic signal
is emitted from the front and rear diaphragms 2F and 2R via the internal exciter. It is a thing. In
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such a placard 11, voices are directly emitted from the diaphragms 2F and 2R before and after
the information display surface 7 is formed similarly to the above-described advertisement
signboard 10. Information linked to each other on the audiovisual side can effectively promote
advertising information, performance contents and the like.
[0027]
FIG. 14 shows a third embodiment of the present invention, wherein a whiteboard 24 is formed
on the outer surface of one diaphragm 2F of the panel type speaker system 1 described above,
and the outer surface of the other diaphragm 2F. A projection / whiteboard 12 is provided which
is provided with a projection member 25 forming a projection surface 25a of the projector. The
whiteboard 24 and the projection member 25 can be used as the surface vibration member 21 of
each diaphragm 2F (2R), but may be separately attached on the surface vibration member 21. In
such a projection / white board 12, an explanation of characters, figures, etc. drawn on the white
board is directly issued from the board, and information related to the contents projected on the
projection plane is the projection plane. Because the sound is emitted directly from the terminal,
it is possible to more effectively recognize the content by the information linked to each other for
both the audiovisual and the visual acuity.
[0028]
As described above, the panel-type speaker system 1 of the present invention is one vibrated by
the exciter 3 sandwiching the front and rear flat diaphragms 2F and 2R, and it is used for
advertising billboards and auditoriums used in a store. By using it as a whiteboard of a projector,
a projection surface of a projector, or a placard for elections, voice guidance according to the
displayed information is clearly and clearly issued to surrounding customers, listeners, etc. It is
possible to appeal display information reliably and effectively by the above information. The
shapes of the diaphragms 2F and 2R are not limited to square, but may be circular, elliptical,
polygonal, or any other suitable shape, and the dimensions of the front and rear diaphragms 2F
and 2R may be different from each other. Moreover, the panel type speaker system 1 of this
invention is not limited at all to what is used as an advertising billboard etc. which provided the
information display surface in this way, It can be used effectively as a pure speaker. For example,
as shown in FIG. 15, if suspended at the approximate center of the ceiling of the lecture room,
clear and clear voice signals can be reliably transmitted to all the listeners, and linguistic learning
lessons at schools etc. Can be used effectively.
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[0029]
As described above, in the panel type speaker system according to the present invention, a pair
of flat diaphragms disposed opposite to each other in the front and back direction, and
interposed between these diaphragms An exciter and a non-directional clear sound signal are
emitted from both the front and rear flat diaphragms so that the contents can be heard naturally
without discomfort from any place, and the exciter Is concealed in the internal space between the
diaphragms, so both the front and rear diaphragm outer surfaces can be used freely as a display
surface, and the exciter is protected from external impact by the diaphragms, so lead wire
breakage and terminal And the like can be avoided, and a waterproof structure can be achieved
extremely easily. And such a speaker system can be used as an advertising billboard, a placard, a
white board, a projection surface of a projector, and in this case, the audiovisual connection is
made to a customer or a listener by a clear and clear acoustic signal. Information can be used to
appeal display information reliably and effectively.
[0030]
Brief description of the drawings
[0031]
1 is a partially broken perspective view showing a panel type speaker system according to a first
embodiment of the present invention.
[0032]
2 is a simplified sectional view showing the main part of the panel type speaker system to which
the exciter is fixed.
[0033]
3 is a simplified sectional view showing the panel type speaker system as well.
[0034]
4 is a simplified cross-sectional view showing a modification using a diaphragm comprising a
foam layer and a surface layer vibration member.
[0035]
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The simplified sectional view which shows the modification which provided the some exciter
which drives the diaphragm of FIG. 5 back and front.
[0036]
6 is a simplified sectional view showing a modification in which the amplifier device is built in
the internal space.
[0037]
Explanatory drawing which shows the panel type speaker system which comprised the
advertising billboard of FIG. 7 mounting type.
[0038]
8 is an explanatory view showing a panel-type speaker system configured a pendant advertising
billboard.
[0039]
9 is an explanatory view showing an embodiment configured as a pendant type advertising
billboard.
[0040]
<Figure 10> The principal part cross section diagram which shows the retention component
which retains the poster.
[0041]
The circuit block diagram inside FIG.
[0042]
12 is an explanatory view showing an embodiment configured as a wall-mounted advertising
billboard.
[0043]
13 is an explanatory view showing a panel type speaker system according to a second
embodiment of the present invention.
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[0044]
14 is an explanatory view showing a panel type speaker system according to a third embodiment
of the present invention.
[0045]
15 is an explanatory view showing an example in which a speaker not used as a display plate is
configured.
[0046]
Explanation of sign
[0047]
DESCRIPTION OF SYMBOLS 1 panel type speaker system 2F, 2R diaphragm 2a, 2b inner surface
3 exciter 5a, 5b lead wire 4 frame 5c, 5d lead wire 6 amplifier apparatus 7 information display
surface 8 wall side opposing surface 9 double-sided tape 10 advertising billboard 10A placement
type advertisement Signboard 11 Placard 10B Pendant advertising sign 20 Core material 10C
Wall-mounted advertising sign 21 Surface vibration member 12 Projection and whiteboard 22
Foam layer 23 Surface vibration member 24 Board 25 Projection member 25a Projection surface
30 Bobbin portion 31 Voice coil 32 Magnetic circuit Part 40 Gripping bar 32a Magnetic gap 41
Side plate 42 Holding frame 43 Opening and closing frame 43a Magnet 51 Jack 52 Input plug
60 Sensor 61 Portable battery 62 Microphone 63 Volume control knob 64 Auxiliary input jack
65a Recording tape input jack 70 Poster 5b Microphone input jack 71 transparent cover 66
recording start switch
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