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JP2008148195

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DESCRIPTION JP2008148195
[PROBLEMS] To provide a speaker with a dust collection function which can reduce a space
occupied and a size increase of a physical size, and can obtain stable high sound quality for a
long time. A replaceable and charged cushion member (31, 32) is provided between an electrode
plate (11, 12) and a diaphragm (14). When the diaphragm 14 vibrates due to the operation of
the speaker 10, air flows in and out of the openings 13 of the electrode plates 11 and 12.
Foreign matter in the air that has flowed into the cushion members 31 and 32 is collected by the
cushion members 31 and 32 by passing through the cushion members 31 and 32. Therefore,
while exhibiting the function of emitting the original sound of the speaker 10, it also exhibits the
function as a dust collector. This does not lead to an increase in occupied space and an increase
in physical size. In addition, since the foreign matter is collected by the cushion members 31 and
32, adhesion of the foreign matter to the diaphragm 14 is reduced. Therefore, stable sound
quality can be maintained for a long time. [Selected figure] Figure 1
Speaker with dust collection function
[0001]
The present invention relates to a speaker, and more particularly to a speaker with a dust
collection function in which a dust collection function is added to an electrostatic speaker.
[0002]
Conventionally, as disclosed in Patent Document 1, an electrostatic speaker is widely proposed.
04-05-2019
1
Such an electrostatic speaker includes a pair of electrode plates, a diaphragm interposed between
the electrode plates, and a cushion member supporting the diaphragm between the electrode
plates. By supplying signals to the pair of electrode plates while applying a bias voltage to the
diaphragm, the diaphragm vibrates and generates sound. In the case of an electrostatic speaker,
by providing a cushion member, the distance between the electrode plate and the diaphragm is
precisely maintained to improve the sound pressure.
[0003]
By the way, it is known that allergies are caused by allergens such as pollen, house dust or
tobacco smoke. Since allergens cause allergies, attention has focused on the removal of these
allergens from the living environment. Therefore, in recent years, dust collectors having various
dust collection functions for collecting allergens are widely used.
[0004]
However, the conventional dust collector is configured simply as an apparatus having a dust
collection function, or is configured by adding a dust collection function to a conventional home
appliance. Thus, in the case of the dust collector which has only a dust collecting function only, in
order to install, predetermined space is required. Therefore, there is a problem of occupying a
certain space in the room of the residence regardless of the use of the dust collector. Moreover,
when adding a dust collecting function to the conventional household appliance, the dust
collecting functional part is provided separately from the original functional part of the home
electric appliance. As a result, there is a problem that the home appliances become larger,
resulting in an increase in occupied space. In addition, since the diaphragm of the speaker is
charged by static electricity, dust and dirt in the air may be easily attached during operation.
Therefore, there is a problem that the vibration of the diaphragm is disturbed and the sound
quality is deteriorated.
[0005]
Unexamined-Japanese-Patent No. 11-178098
[0006]
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2
Therefore, an object of the present invention is to provide a speaker with a dust collection
function which can reduce the space occupied and the enlargement of the physique, and can
provide stable high-quality sound over a long period of time.
Another object of the present invention is to provide a dust collector with a speaker function,
which can reduce the space occupied and the enlargement of the physical size, and can provide
stable high-quality sound over a long period of time.
[0007]
(1) In the present invention, at least one of the pair of electrode plates having an opening
through which air can be transmitted and disposed opposite to each other and a predetermined
distance between the pair of electrode plates and the electrode plate. And a flexible diaphragm
which is exchangeably provided in a space formed between the electrode plate and the
diaphragm, and is supported between the electrode plate and the diaphragm. And a cushion
member formed of a material. The speaker is provided with a pair of electrode plates and a
diaphragm interposed between the pair of electrode plates in order to exhibit the original
function. And the cushion member for maintaining the distance between an electrode plate and a
diaphragm in predetermined | prescribed range is provided. The electrode plate has an opening
on at least one side. Therefore, air vibrates in and out of the cushion member through the
opening due to the vibration of the diaphragm. The air entering and exiting the cushioning
member passes through the cushioning member as the diaphragm vibrates, so that the contained
foreign matter is collected on the cushioning member having a large surface area. As a result, the
cushion member exhibits a dust collecting function of collecting foreign matter contained in the
air. Foreign matter in the air is collected by the cushion member, so adhesion of the foreign
matter to the diaphragm is reduced. Furthermore, by making the cushion member exchangeable,
the cushion member is easily exchanged when the collected foreign matter increases. As a result,
the function as a dust collector is exhibited while maintaining the physique as a speaker.
Therefore, it is possible to reduce enlargement of the space and physical size to be occupied, and
to maintain stable sound quality for a long time.
[0008]
(2) In the present invention, the cushion member is charged. As a result, the cushion member
collects extremely minute foreign matter of nanometer order such as pollen, house dust, cigarette
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3
smoke or virus as an electrostatic filter. Therefore, the dust collection function can be improved.
[0009]
(3) In the present invention, the cushion member forms a cassette together with the support
portion for supporting the peripheral portion of the cushion member, and the cassette is
detachable from each space formed between the electrode plate and the diaphragm. It is. The
cushion member can be easily attached and detached between the electrode plate and the
diaphragm by forming the cassette together with the support member. Therefore, the cushion
member can be easily replaced.
[0010]
(4) In the present invention, the cushion member drive means is provided for moving the cushion
member within the space formed between the electrode plate and the diaphragm. Thus, when the
cushion member is contaminated by the collected foreign matter, the cushion member is moved
inside the space, whereby a clean cushion member is positioned in the space. Therefore, the
cushion member can be easily replaced, and the dust collection function can be improved.
[0011]
(5) In the present invention, the cushion member driving means has a winding portion which
winds the cushion member from one side of the space to the other side. For example, a clean
cushion member is always positioned in the space by winding a clean cushion member at one
end of the space and periodically winding it around the other end via the space. Therefore, it can
be easily replaced with a clean cushion member, and the dust collection function can be
improved.
[0012]
(6) In the present invention, the cushion member drive means has a circulation drive portion that
drives the cushion member to circulate through the space, and an adsorption portion that
adsorbs the foreign matter collected on the cushion member. The cushion member is periodically
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circulated in space by the circulation drive unit, and the foreign matter collected by the cushion
member is adsorbed by the adsorption unit. Thereby, a clean cushion member is always located
in the space. Therefore, it can be easily replaced with a clean cushion member, and the dust
collection function can be improved.
[0013]
(7) The present invention further includes a vibration drive unit that drives the vibration plate at
a low frequency outside the audible range. When functioning as a speaker, the diaphragm is
driven to vibrate at a frequency in the audible range. On the other hand, when the diaphragm
does not function as a speaker, the vibration of the diaphragm at a low frequency other than the
audible range promotes the air to and from the cushion member through the opening. In this
case, air vibrates in and out of the cushion member slowly through the opening by vibrating the
diaphragm at an extremely low frequency of, for example, about 0.1 Hz. As a result, air
containing foreign matter passes slowly through the cushion member, and the dust collection
effect by the cushion member is improved. Therefore, when functioning as a speaker, sound can
be collected while emitting sound by vibrating the diaphragm in the audible range, and when not
functioning as a speaker, sound felt by the human body by vibrating the diaphragm outside the
audible range It can be collected without emitting.
[0014]
(8) In the present invention, a predetermined distance between the pair of electrode plates and
the pair of electrode plates, each of which has an opening through which at least one can
transmit air, is disposed opposite to the pair of electrode plates. It is exchangeably provided in
the space formed between the electrode plate and the diaphragm, and is exchangeably provided
between the electrode plate and the diaphragm, and is charged and supported between the
electrode plate and the diaphragm. A cushion member that is formed of a flexible material that
collects foreign matter contained in air entering and exiting through the opening by the vibration
of the diaphragm, and a vibration drive unit that drives the diaphragm at low frequencies outside
the audible range And. The speaker is provided with a pair of electrode plates and a diaphragm
interposed between the pair of electrode plates in order to exhibit the original function. And the
cushion member for maintaining the distance between an electrode plate and a diaphragm in
predetermined | prescribed range is provided. The electrode plate has an opening on at least one
side. Therefore, air vibrates in and out of the cushion member through the opening due to the
vibration of the diaphragm. The air entering and exiting the cushioning member passes through
the cushioning member as the diaphragm vibrates, so that the contained foreign matter is
04-05-2019
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collected on the cushioning member having a large surface area. As a result, the cushion member
exhibits a dust collecting function of collecting foreign matter contained in the air. Foreign
matter in the air is collected by the cushion member, so adhesion of the foreign matter to the
diaphragm is reduced. Furthermore, by making the cushion member exchangeable, the cushion
member is easily exchanged when the collected foreign matter increases. As a result of these,
while maintaining the physique as a speaker, the function as a dust collector is also exhibited.
Therefore, it is possible to reduce enlargement of the space and physical size to be occupied, and
to maintain stable sound quality for a long time.
[0015]
Hereinafter, a plurality of embodiments of a speaker with dust collection function according to
the present invention will be described in detail based on the drawings. In addition, the same
code | symbol is attached | subjected to a substantially identical component in several
embodiment, and description is abbreviate | omitted. First Embodiment A speaker with a dust
collection function according to a first embodiment of the present invention (hereinafter simply
referred to as “speaker”). ) Is shown in FIG. FIG. 1A is a cross-sectional view schematically
showing the speaker 10 according to the first embodiment, and FIG. 1B is a view as seen from
the direction of arrow B in FIG.
[0016]
The speaker 10 includes an electrode plate 11 and an electrode plate 12. The electrode plate 11
and the electrode plate 12 are disposed substantially in parallel. Thereby, the electrode plate 11
and the electrode plate 12 form a pair of electrodes. The electrode plate 11 and the electrode
plate 12 are formed in a plate shape from a conductive material such as metal, for example.
Further, the electrode plate 11 and the electrode plate 12 may be formed by forming a
conductive film on the surface of a sheet made of resin. The electrode plate 11 and the electrode
plate 12 are set to a thickness of about several millimeters. In addition, in FIG. 1, the thickness of
each part including the electrode plate 11 and the electrode plate 12 is expanded and shown for
the simplification of description.
[0017]
The electrode plate 11 and the electrode plate 12 have an opening 13. The opening 13 is formed
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to penetrate in the thickness direction of the electrode plate 11 and the electrode plate 12. The
hole area ratio of the electrode plate 11 and the electrode plate 12 can be set arbitrarily, but is
preferably set to about 40% to 60%. The openings 13 can be arbitrarily disposed in the electrode
plate 11 and the electrode plate 12. The opening 13 may be provided in both the electrode plate
11 and the electrode plate 12 as in the present embodiment, or may be provided in at least one
of the pair of electrode plates 11 or 12. When the opening 13 is provided in one of the electrode
plates 11 and 12, it is desirable to form the opening 13 in the electrode plate facing the outside
air. Further, the mesh is not limited to the electrode plate 11 and the electrode plate 12 in which
the opening 13 is formed, and for example, a mesh-like electrode plate may be used to use the
mesh as the opening.
[0018]
A diaphragm 14 is sandwiched between the pair of electrode plates 11 and 12. The diaphragm
14 is obtained by forming a conductive film on the surface of a resin film such as PET
(polyethylene terephthalate). As the conductive film, for example, a vapor-deposited film of metal,
or one coated with carbon particles can be used. The film forming the diaphragm 14 is set to a
thickness of about several μm.
[0019]
Frame members 15 are provided between the electrode plate 11 and the diaphragm 14 and
between the electrode plate 12 and the diaphragm 14, respectively. The frame member 15
supports the electrode plate 11, the electrode plate 12, and the diaphragm 14 at predetermined
intervals. The frame member 15 is formed of, for example, a resin such as vinyl chloride. When
the electrode plate 11, the electrode plate 12, the diaphragm 14, and the frame member 15 are
assembled, the speaker 10 is formed in a thin plate shape having a thickness of several mm to
several tens mm.
[0020]
A predetermined space 21 is formed between the electrode plate 11 and the diaphragm 14 by
the frame member 15. Similarly, a predetermined space 22 is formed between the electrode plate
12 and the diaphragm 14 by the frame member 15. The cushion member 31 and the cushion
member 32 are respectively provided in the space 21 and the space 22. The cushion member 31
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is provided in the space 21 between the electrode plate 11 and the diaphragm 14, and maintains
a constant distance between the electrode plate 11 and the diaphragm 14. Similarly, the cushion
member 32 is provided in the space 22 between the electrode plate 12 and the diaphragm 14
and maintains a constant distance between the electrode plate 12 and the diaphragm 14.
[0021]
The cushion member 31 and the cushion member 32 are both formed of a soft, elastic and
breathable material. The cushion member 31 and the cushion member 32 are made of, for
example, a non-woven fabric of PET resin, a High Efficiency Particulate Air Filter (HEPA), or a
foamed resin. Such a cushion member 31 and the cushion member 32 have a very large surface
area for collecting foreign matter such as dust and dirt in the air. Therefore, when air passes
through the cushion member 31 and the cushion member 32, foreign substances in the air are
collected by the cushion member 31 and the cushion member 32. The cushion member 31 and
the cushion member 32 can be put in and out of the space 21 and the space 22 as needed.
[0022]
The cushion member 31 and the cushion member 32 are charged by, for example, corona
discharge. As a result, foreign matter in the air passing through the cushion member 31 and the
cushion member 32 is also collected by electrostatic attraction with the cushion member 31 and
the cushion member 32 which are charged. As a result, the ability to collect foreign matter in air
is improved.
[0023]
The speaker 10 includes a step-up transformer 16, a power amplifier 17, and a dust collection
amplifier 18. The electrode plate 11 and the electrode plate 12 are electrically connected to the
step-up transformer 16, respectively. Further, a bias voltage of several kV is applied to the
diaphragm 14. A voltage whose polarity is reversed is applied from the step-up transformer 16 to
the electrode plate 11 and the electrode plate 12. Thereby, the coulomb force between the
electrode plate 11 and the electrode plate 12 and the diaphragm 14 is changed by outputting an
electric signal corresponding to the audio signal from the power amplifier 17 to the electrode
plate 11 and the electrode plate 12, and the diaphragm 14 vibrates. The sound generated by the
vibration of the diaphragm 14 is emitted to the outside through the electrode plate 11 and the
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8
opening 13 of the electrode plate 12.
[0024]
The dust collection amplifier 18 as a vibration drive unit outputs an electric signal to the
electrode plate 11 and the electrode plate 12 when an audio signal is not input to the power
amplifier 17. As a result, when an audio signal is not input to the power amplifier 17, that is,
when no audio is emitted from the speaker 10, the diaphragm 14 vibrates in accordance with the
output signal from the dust collection amplifier 18. The dust collection amplifier 18 outputs an
electrical signal of a frequency outside the audible range of, for example, about 0.1 Hz. As a
result, even if the diaphragm 14 vibrates due to the electric signal output from the dust collection
amplifier 18, a person can not hear the generated sound.
[0025]
When sound is emitted from the speaker 10, the diaphragm 14 vibrates by the output signal
from the power amplifier 17 corresponding to the sound signal. At this time, air outside the
speaker 10 enters and exits the cushion members 31 and 32 from the openings 13 of the
electrode plates 11 and 12. The cushion members 31 and 32 collect foreign matter from the air
flowing into the cushion members 31 and 32 from the openings 13 of the electrode plates 11
and 12. Then, the air purified by the cushion members 31 and 32 is discharged to the outside of
the speaker 10 through the openings 13 of the electrode plates 11 and 12. Therefore, in the
speaker 10, foreign substances in the air are collected while exerting the function of the speaker
10 to emit sound.
[0026]
On the other hand, when no sound is emitted from the speaker 10, that is, when there is no input
of an audio signal, the dust collection amplifier 18 outputs a low frequency electrical signal
outside the audible range to the electrode plates 11, 12. Thus, the diaphragm 14 vibrates at a
frequency that can not be heard by a person. By vibrating the diaphragm 14 at a low frequency,
a relatively large amount of air having a small flow velocity flows into and out of the cushion
members 31 and 32 from the openings 13 of the electrode plates 11 and 12.
04-05-2019
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[0027]
As described above, when an electric signal is output from the power amplifier 17 to the
electrode plates 11 and 12 and when an electric signal is output from the dust collection
amplifier 18 to the electrode plates 11 and 12, a diaphragm is used. A bias voltage of about
several kilovolts is applied to 14. Therefore, the diaphragm 14 is charged. As a result, the foreign
matter contained in the air flowing into the cushion members 31 and 32 moves the cushion
members 31 and 32 toward the diaphragm 14 due to the electrostatic attraction generated
between itself and the diaphragm 14. When foreign matter contained in the air passes through
the cushion members 31 and 32, relatively large foreign matter is collected by the mesh formed
by the cushion members 31 and 32.
[0028]
Further, since the cushion members 31 and 32 are also charged, foreign substances in the air
passing through the cushion members 31 and 32 are also captured by the cushion members 31
and 32 by electrostatic attraction generated between the cushion members 31 and 32. Collected.
Therefore, minute foreign substances of nanometer order included in the air are also collected by
the charged cushion members 31 and 32. Furthermore, the foreign matter collected by
electrostatic attraction due to the charging of the cushion members 31 and 32 is firmly adsorbed
to the cushion members 31 and 32, and the re-emission of the speaker 10 to the outside is
reduced.
[0029]
The cushion member 31 and the cushion member 32 can be inserted into and removed from the
space 21 or the space 22 between the electrode plate 11 and the electrode plate 12 and the
diaphragm 14. Therefore, when contamination of the cushion member 31 and the cushion
member 32 progresses by long-term use, the cushion member 31 and the cushion member 32
can be replaced.
[0030]
As described above, in the first embodiment, the replaceable cushion member 31 and the cushion
04-05-2019
10
member 32 are provided between the electrode plate 11 and the electrode plate 12 of the
speaker 10 and the diaphragm 14, respectively. Foreign matter in the air flowing to the side of
the diaphragm 14 charged from the openings 13 of the electrode plate 11 and the electrode
plate 12 by the vibration of the diaphragm 14 accompanying the operation of the speaker 10
passes through the cushion member 31 and the cushion member 32. It is collected by the
cushion member 31 and the cushion member 32. Therefore, while exhibiting the function of
emitting the voice inherent to the speaker 10, the function as the dust collector can be exhibited.
As described above, since the function as the dust collector is achieved while maintaining the
configuration of the speaker 10, an increase in occupied space and an increase in physical size
do not occur. In addition, foreign substances in the air are collected by the cushion member 31
and the cushion member 32. Therefore, foreign matter in the air adhering to the diaphragm 14 is
reduced. Thereby, even if it operates for a long period of time, vibration defects of the diaphragm
14 due to the attached foreign matter are less likely to occur. Therefore, stable sound quality can
be maintained for a long time.
[0031]
In the first embodiment, the cushion member 31 and the cushion member 32 are charged.
Therefore, the cushion member 31 and the cushion member 32 also capture minute foreign
matter of nanometer order that can not be collected by the mesh filter due to electrostatic
attraction. Therefore, it is possible to accurately collect minute foreign substances such as pollen,
house dust or cigarette smoke which causes allergy, and viruses which cause disease.
[0032]
Furthermore, in the first embodiment, when the speaker 10 does not emit sound, the diaphragm
14 vibrates at a low frequency outside the audible range. Therefore, when not functioning as the
speaker 10, the dust collector functions as a dust collector for removing foreign matter in the air
with almost no sound. Therefore, the functions of the speaker 10 and the dust collector can be
compatible.
[0033]
Second Embodiment A loudspeaker according to a second embodiment of the present invention
is shown in FIG. In the case of the second embodiment, the speaker 10 is provided with the dust
04-05-2019
11
collection cassette 40. The dust collection cassette 40 has a support portion 41 that supports the
peripheral edge of the cushion member 33. The support portion 41 is formed of, for example, a
resin such as vinyl chloride. The dust collection cassette 40 is formed slightly smaller than the
space 21 formed between the electrode plate 11 and the diaphragm 14 and the space 22 formed
between the electrode plate 12 and the diaphragm 14. Therefore, the dust collection cassette 40
is attachable to and detachable from the space 21 and the space 22.
[0034]
The cushion member 33 collects and contaminates foreign matter in the air by long-term use.
Therefore, it is desirable to replace it regularly. In the second embodiment, the cushion member
33 is formed as the dust collection cassette 40. Thus, by attaching and detaching the dust
collection cassette 40 to the spaces 21 and 22, replacement of the cushion member 33 can be
facilitated.
[0035]
Third Embodiment A loudspeaker according to a third embodiment of the present invention is
shown in FIG. In the third embodiment, the speaker 10 includes a winding device 50 as a cushion
member driving unit. The winding device 50 has new rollers 51 and 52 provided on one end side
of the speaker 10 and used rollers 53 and 54 provided on the other end side. The new rollers 51
and 52 and the used rollers 53 and 54 constitute a winding unit. The cushion members 34 and
35 are formed in a band shape, one end of which is wound around the new rollers 51 and 52 and
the other end of which are wound around the used rollers 53 and 54. The unused cushion
members 34 and 35 wound around the new rollers 51 and 52 are wound up by the used rollers
53 and 54 at the other end. Thus, by driving the winding device 50 periodically, the cushion
members 34 and 35 are wound from the new rollers 51 and 52 to the used rollers 53 and 54. As
a result, clean cushion members 34 and 35 are periodically introduced into the space 21
between the electrode plate 11 and the diaphragm 14 and the space 22 between the electrode
plate 12 and the diaphragm 14.
[0036]
In the third embodiment, the cushion members 34 and 35 periodically have clean portions
located in the space 21 and the space 22. Therefore, the cushion members 34 and 35 which
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12
collect and contaminate foreign matter in the air can be easily replaced.
[0037]
Fourth Embodiment A loudspeaker according to a fourth embodiment of the present invention is
shown in FIG. In the fourth embodiment, the speaker 10 is provided with a circulation drive
device 60 as cushion member drive means. The circulation drive device 60 has a drive roller 61
and a drive roller 62 as a circulation drive unit. The driving roller 61 and the driving roller 62
are provided at both ends of the speaker 10 respectively. The cushion member 36 is formed in
an annular shape. One end of the cushion member 36 is supported by the drive roller 61, and the
other end is supported by the drive roller 62. As the drive roller 61 and the drive roller 62 rotate,
the cushion member 36 circulates through the space 21 between the electrode plate 11 and the
diaphragm 14 and the space 22 between the electrode plate 12 and the diaphragm 14.
[0038]
Further, the circulation drive device 60 has a suction roller 63 as a suction unit. The suction
roller 63 is in contact with the circulating cushion member 36. When the cushion member 36
comes in contact with the suction roller 63, the foreign material attached to the cushion member
36 is removed by the suction roller 63. As described above, the cushion member 36 circulates in
the space 21 and the space 22 while the foreign matter attached by the suction roller 63 is
removed.
[0039]
In the fourth embodiment, the cushion member 36 is circulated by the circulation drive device
60 so that clean parts are located in the space 21 and the space 22. Therefore, it is possible to
easily replace the cushion member 36 which has collected and contaminated the foreign matter
in the air.
[0040]
Other Embodiments In the embodiments described above, the speaker 10 with the dust collection
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13
function has been described as an example. However, it may be considered as a dust collector
with a speaker function or an air cleaner with a speaker function while making the configuration
and function the same as those of the above-described embodiments.
[0041]
(A) is sectional drawing which shows the outline of the speaker by 1st Embodiment of this
invention, (B) is the arrow line view seen from the arrow B direction of (A). (A) is sectional
drawing which shows the outline of the speaker by 2nd Embodiment of this invention, (B) is a top
view which shows the outline of the dust collection cassette of the speaker by 2nd Embodiment.
Sectional drawing which shows the outline of the speaker by 3rd Embodiment of this invention.
Sectional drawing which shows the outline of the speaker by 4th Embodiment of this invention.
Explanation of sign
[0042]
10: speaker, 11: electrode plate, 12: electrode plate, 13: opening, 14: diaphragm, 21: space, 22:
space, 31, 32, 33, 34, 35, 36: cushion member, 40: dust collection Cassette, 41: Support portion,
50: Winding device (cushion member driving means), 51: New roller (rolling portion), 53: Used
roller (winding portion), 60: Circulation driving device (cushion member driving means , 61, 62:
drive roller (circulation drive unit), 63: suction roller (suction unit)
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