close

Вход

Забыли?

вход по аккаунту

?

JP2012004875

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2012004875
An object of the present invention is to suppress the current flowing from an electrostatic
speaker to a human body. An electrostatic speaker 1 is connected to a drive unit 100 including a
transformer 50, an input unit 60 to which an acoustic signal is input from the outside, and a bias
power supply 70 for applying a DC bias to the vibrating body 10. Ru. One resistor is connected to
one electrode 20U, 20L, a resistor RU is connected to the electrode 20U, and a resistor RL is
connected to the electrode 20L. The terminal on the side opposite to the side connected to the
electrode 20U in each resistor RU is connected at one point and connected to the terminal T1 on
the output side of the transformer 50. The terminal on the opposite side to the side connected to
the electrode 20L in each resistor RL is connected at one point and connected to the other
terminal T2 on the output side of the transformer 50. The vibrating body 10 is also connected to
the bias power supply 70 via the resistor Rc. The terminal T3 at the midpoint of the transformer
50 is connected to the ground. [Selected figure] Figure 4
Electrostatic speaker
[0001]
The present invention relates to an electrostatic speaker.
[0002]
As a flexible, foldable or bendable electrostatic speaker, for example, there is an electrostatic
speaker disclosed in Patent Document 1.
04-05-2019
1
In this electrostatic speaker, a film of polyester on which aluminum is vapor-deposited is
sandwiched between two cloths woven by conductive yarns, and ester wool is disposed between
the film and the cloth.
[0003]
JP 2008-54154 A
[0004]
In the speaker disclosed in Patent Document 1, the cloth that functions as an electrode is
exposed, so the cloth is easy to touch the human body, and when the human body touches the
cloth, current flows from the speaker to the human body to cause electric shock. There is a risk.
[0005]
The present invention has been made under the above-described background, and an object of
the present invention is to provide a technique for suppressing the current flowing from the
electrostatic speaker to the human body.
[0006]
In order to solve the problems described above, according to the present invention, a sheet-like
vibrator having conductivity, a plurality of first electrodes opposed to the vibrator, and spaced
apart from each other, the vibrator, and the vibrator are described. A plurality of first members
positioned between the first electrode for spacing the vibrator and the first electrode, and a
plurality of members disposed opposite to the first electrode with the vibrator interposed
therebetween and spaced apart from each other A second member positioned between the
vibrating body and the second electrode to space the vibrating body and the second electrode,
and provided for each of the plurality of first electrodes, A plurality of resistances connected to
the first electrode to supply an acoustic signal, the current value of the current flowing through
the first electrode being less than a predetermined value when the voltage value of the acoustic
signal is a predetermined voltage value And each of the plurality of second electrodes and
connected to the second electrode to And a plurality of resistors for making the current value of
the current flowing through the second electrode less than a predetermined value when the
voltage value of the acoustic signal is a predetermined voltage value. I will provide a.
[0007]
04-05-2019
2
In the present invention, the plurality of first electrodes may be covered with an insulator, and
the plurality of second electrodes may be covered with an insulator.
In the present invention, in the plurality of resistors connected to the first electrode, terminals
opposite to the side connected to the first electrode are connected to each other, and are
connected to the second electrode. The plurality of resistors may have a configuration in which
terminals opposite to the side connected to the second electrode are connected to each other.
[0008]
According to the present invention, the current flowing from the electrostatic speaker to the
human body can be suppressed.
[0009]
FIG. 1 is an external view of an electrostatic speaker 1 according to an embodiment of the
present invention.
1. AA sectional view taken on the line of FIG.
The exploded view of electrostatic type speaker 1.
FIG. 2 is a diagram showing an electrical configuration of the electrostatic speaker 1.
The enlarged view of the side of electrostatic type speaker 1 concerning the modification of the
present invention. The enlarged view of the side of electrostatic type speaker 1 concerning the
modification of the present invention. The bottom view of electrode 20UA concerning the
modification of the present invention. The top view of the electrostatic-type speaker 1 which
concerns on the modification of this invention. The exploded view of electrostatic type speaker 1
concerning a modification.
[0010]
04-05-2019
3
Embodiment FIG. 1 is an external view of an electrostatic speaker 1 according to an embodiment
of the present invention, and FIG. 2 is a cross-sectional view of the electrostatic speaker 1 taken
along line AA. 3 is an exploded view of the electrostatic speaker 1, and FIG. 4 is a diagram
showing the electrical configuration of the electrostatic speaker 1. As shown in FIG. In the figure,
the directions are indicated by the x-axis, y-axis, and z-axis orthogonal to each other. The
horizontal direction when the electrostatic speaker 1 is viewed from the front is the x-axis
direction, and the depth direction is the y-axis direction. The height direction is the z-axis
direction. Further, in the drawings, those in which “•” is described in “o” means an arrow
directed from the back to the front of the drawing. Further, in the drawings, those in which “x”
is described in “o” means an arrow directed from the front to the back of the drawing.
[0011]
As shown in the figure, the electrostatic loudspeaker 1 is composed of a vibrator 10, n electrodes
20U, n electrodes 20L (n is an integer), and elastic members 30U and 30L (in the figure, n = 20).
In the present embodiment, the configurations of the electrode 20U and the electrode 20L are
the same, and the configurations of the elastic member 30U (first member) and the elastic
member 30L (second member) are the same. For this reason, when it is not necessary to
distinguish both in each member, the description of "L", "U", etc. is omitted. Also, the dimensions
of the respective components such as the vibrator and electrodes in the drawing are different
from the actual dimensions so that the shapes of the components can be easily understood.
[0012]
(Configuration of Each Part of Electrostatic Speaker 1) First, each part of the electrostatic speaker
1 will be described. The rectangular vibrator 10 viewed from the point on the z-axis is made of a
film (insulating layer) of an insulating and flexible synthetic resin such as PET (polyethylene
terephthalate) or PP (polypropylene). A conductive metal is deposited on one surface of the film
to form a conductive film (conductive layer). In the present embodiment, the conductive film is
formed on one side of the film, but may be formed on both sides of the film.
[0013]
04-05-2019
4
The elastic member 30 is a non-woven fabric in the present embodiment and does not conduct
electricity and allows air and sound to pass therethrough, and its shape is rectangular as viewed
from the point on the z-axis. Also, the elastic member 30 has elasticity, and deforms when an
external force is applied, and returns to its original shape when an external force is removed. The
elastic member 30 may be any member having insulation, sound transmission and elasticity,
such as heat-added and compressed batting, woven cloth, and spongy synthetic resin, etc. It may
be In the present embodiment, the dimensions of the elastic member 30U and the elastic member
30L are the same. The elastic member 30 has a width in the left-right direction (width in the xaxis direction) greater than that in the left-right direction of the vibrator 10, and a width in the
depth direction (width in the y-axis) is the width in the depth direction of the vibrator 10 It is
wider.
[0014]
The electrode 20 uses a film (insulating layer) of insulating synthetic resin such as PET or PP as a
substrate, and a conductive metal is deposited on one surface of the film to form a conductive
film (conductive layer). It is a structure. Each electrode 20 is rectangular when viewed from a
point on the z-axis, and the width in the left-right direction is the same in all, and the width in the
depth direction is also the same. In addition, the electrode 20 has a plurality of holes penetrating
from the front surface to the back surface, which allows air and sound to pass therethrough. In
the drawings, the illustration of the holes is omitted. The number of electrodes 20U and the
number of electrodes 20L are the same. The number of electrodes 20U and the number of
electrodes 20L will be described later.
[0015]
(Structure of Electrostatic Speaker 1) Next, the structure of the electrostatic speaker 1 will be
described. In the electrostatic loudspeaker 1, the vibrating body 10 is disposed between the
lower surface of the elastic member 30U and the upper surface of the elastic member 30L. The
adhesive is applied to the elastic member 30U and the elastic member 30L with a width of
several mm from the edge in the left-right direction and the edge in the depth direction, and the
portion to which the adhesive is applied The inner side is not fixed to the elastic member 30U
and the elastic member 30L.
[0016]
04-05-2019
5
The electrodes 20U are arranged on the upper surface of the elastic member 30U at
predetermined intervals in the depth direction (y-axis direction), and are bonded to the elastic
member 30U. Further, the electrodes 20L are arranged at predetermined intervals in the depth
direction on the lower surface side of the elastic member 30L, and are bonded to the elastic
member 30L. The electrode 20U is coated with an adhesive with a width of several mm from the
edge in the left-right direction and the edge in the depth direction and is adhered to the elastic
member 30U. It is in a state of not being fixed to 30U. Further, the electrode 20L is also coated
with an adhesive with a width of several mm from the edge in the left-right direction and the
edge in the depth direction and is adhered to the elastic member 30L It is in a state of not being
fixed to 30L. The electrode 20U is in contact with the elastic member 30U at the side with the
conductive film, and the electrode 20L is in contact with the elastic member 30L at the side with
the conductive film.
[0017]
The electrode 20U and the electrode 20L are disposed such that one electrode 20U and one
electrode 20L face each other with the vibrating body 10 interposed therebetween. Specifically,
when viewed from a point on the z-axis, the electrode 20U and the electrode 20L have the same
position in the lateral direction and the position in the depth direction.
[0018]
(Electrical Configuration of Electrostatic Speaker 1) Next, the electrical configuration of the
electrostatic speaker 1 will be described. As shown in FIG. 4, the electrostatic speaker 1 includes
a transformer 50, an input unit 60 to which an acoustic signal is input from the outside, and a
drive unit 70 provided with a bias power supply 70 for applying a DC bias to the vibrator 10.
100 is connected. In addition, the electrostatic speaker 1 has a plurality of resistors (the
resistance value of the resistors will be described later). One resistor is connected to one
electrode 20, a resistor RU is connected to the electrode 20U, and a resistor RL is connected to
the electrode 20L. The terminal on the side opposite to the side connected to the electrode 20U
in each resistor RU is connected at one point and connected to the terminal T1 on the output side
of the transformer 50. The terminal on the opposite side to the side connected to the electrode
20L in each resistor RL is connected at one point and connected to the other terminal T2 on the
output side of the transformer 50. The vibrating body 10 is also connected to the bias power
supply 70 via the resistor Rc. Terminal T3 at the midpoint of transformer 50 is connected to
ground.
04-05-2019
6
[0019]
In this configuration, the electrostatic speaker 1 functions as a push-pull electrostatic speaker.
When an acoustic signal is input to the input unit 60, a voltage corresponding to the input
acoustic signal is applied from the transformer 50 to the electrodes 20U and 20L via the
resistors RU and RL. Specifically, the signal output from the terminal T1 is supplied to the
resistor RU, and is supplied from the resistor RU to the electrode 20U. Further, the signal output
from the terminal T2 is supplied to the resistor RL, and is supplied from the each resistor RL to
the electrode 20L. Then, when a potential difference is generated between the conductive film of
the electrode 20U and the conductive film of the electrode 20L by the applied voltage, the
conductive film of the vibrator 10 is attracted to either the electrode 20U or the electrode 20L.
The electrostatic force acts, and the vibrator 10 is displaced in either direction of the electrode
20U or the electrode 20L according to the electrostatic force. Then, the displacement direction
and the displacement amount of the vibrating body 10 sequentially change according to the
acoustic signal, thereby vibrating the vibrating body 10, and a sound corresponding to the
vibration state (frequency, amplitude, phase) is generated from the vibrating body 10 . The
generated sound passes through at least one of the elastic member 30 and the electrode 20 and
is radiated to the outside of the electrostatic speaker 1.
[0020]
According to the present embodiment, since the current flowing from the transformer 50 to the
electrode 20 is limited by the resistors RU and RL, the current flowing from the electrostatic
speaker to the human body can be suppressed. Further, in the present embodiment, since the
acoustic signal is supplied in the same phase to the pairs of the plurality of electrodes 20U and
the electrodes 20L, the entire vibrating body 10 can be vibrated. Further, in the present
embodiment, the resistor RU is connected at one point, and the resistor RL is also connected at
one point, so that it can be easily connected to the transformer 50.
[0021]
(Resistor RU, Resistance Value of Resistor RL) Since the electrode 20 faces the outside in the
electrostatic speaker 1, when the human body is touched, current may flow to the human body to
cause electric shock. Therefore, in the present invention, the current flowing to the electrode 20
04-05-2019
7
is limited by the resistor RU and the resistor RL so that it is safe for the human body to touch the
electrode.
[0022]
First, in view of JIS C 6065 (audio, video and similar electronic devices-safety requirements), the
peak value of the current flowing in the electrode 20 is set to 0 beforehand so that the electrode
20 does not become a dangerous live part. The case where it sets to .7 mA is explained. Here, a
predetermined maximum voltage (effective value) applied to each electrode 20 is 100 V, and a
voltage of 1 / √ {square root over (8)} of the maximum voltage in a state where an acoustic
signal is supplied to perform normal operation. Is assumed to be applied to each electrode 20.
Since the resistance value is determined by voltage / current, the resistance value is determined
by (100 V / √8) /0.7 mA, and the resistance value of each resistor RU and each resistor RL is
approximately 51 kΩ. . In addition, when the maximum voltage (effective value) applied to the
electrode 20 is 200 V in advance, the resistance value is obtained by the resistance value = (200
V / √8) /0.7 mA, and each resistor is The resistance value of RU and each resistor RL is
approximately 101 kΩ.
[0023]
Next, in view of JIS C 6065, a case where the peak value of the current flowing through the
electrode 20 is set to 3.5 mA in advance as a current value which should not flow in a failure
state will be described. Here, the maximum voltage (effective value) applied to each electrode 20
is 100 V, and in the state where the acoustic signal is supplied and the normal operation is
performed, the voltage of 1 / 最大 8 of the maximum voltage is each electrode 20 Assume the
state applied to the The resistance value is determined by the resistance value = (100 V / √8)
/3.5 mA, and the resistance value of each resistor RU and each resistor RL is approximately 10
kΩ. When the maximum voltage (effective value) applied to electrode 20 is 200 V, the resistance
value is determined by the resistance value = (200 V / √8) /3.5 mA, and each resistor RU And
the resistance value of each resistor RL is about 20 kΩ.
[0024]
(Number of Electrodes 20) Next, the number of electrodes 20U and the number of electrodes 20L
will be described. In the electrostatic speaker 1, a series circuit (RC circuit) of a resistor and a
04-05-2019
8
capacitor is formed by the resistor connected to the electrode 20 and the capacitance of the
electrode 20. For this reason, in the electrostatic speaker 1, the capacitance is set such that the
time constant of the RC circuit as a speaker satisfies a desired frequency characteristic. For
example, it is assumed that the maximum voltage (effective value) applied to the electrode 20 is
200 V, and the resistance value of the resistor is 101 kΩ by the above-described calculation.
Since the cutoff frequency f0 of the RC circuit is obtained by f0 = 1 / 2πRC, assuming 10 kHz as
the cutoff frequency, 10 kHz = 1 / (2π × 101 kΩ × C). When the capacitance C of one
electrode 20 is obtained from this equation, C is about 158 pF. Here, when there is an electrode
having an electrostatic capacitance of 1.2 × 10 <4> pF per 1 m <2>, the plurality of electrodes
20 U are formed by dividing the 1 m <2> electrode. For this purpose, the 1 m <2> electrode may
be divided so that the capacitance of one electrode is 158 pF. That is, 1.2 × 10 <4> pF / 158 pF
= 76, and the electrostatic capacitance per 1 m <2> is 1.2 × 10 <4> pF by dividing the electrode
into 76 electrodes 20 U Similarly, the electrode having a capacitance of 1.2 × 10 <4> pF per 1 m
<2> is divided to form 76 electrodes 20L.
[0025]
The above-mentioned cutoff frequency is an example, and the cutoff frequency is changed
according to the performance required of the electrostatic speaker 1. Further, the electrostatic
capacitance of the electrode before division is also an example, and the present invention is not
limited to the above-mentioned numerical value.
[0026]
[Modifications] Although the embodiment of the present invention has been described above, the
present invention is not limited to the above-described embodiment, and can be practiced in
various other forms. For example, the above-described embodiment may be modified as follows
to implement the present invention. The above-described embodiment and the following
modifications may be combined with each other.
[0027]
In the electrode 20U and the electrode 20L, an insulator may be disposed between the electrodes
20 so that adjacent electrodes are not electrically connected to each other. FIG. 5 is an enlarged
view of a part of the side surface of the electrostatic loudspeaker 1 according to the present
04-05-2019
9
modification. As shown in FIG. 5, an elastic member 35 made of the same material as the elastic
member 30 may be disposed between the electrode 20 and the electrode 20.
[0028]
In the present invention, the entire surface of the conductive film of the electrode 20 is covered
with a film of insulating synthetic resin, and the electrode 20 covered with the film of insulating
material is disposed on the surface of the elastic member 30. Good. In the present invention, an
insulator may be disposed on the outer surface in the height direction of the electrostatic speaker
1. FIG. 6 is an enlarged view of a part of the side surface of the electrostatic speaker 1 according
to the present modification. As shown in FIG. 6, the outer surface of the electrostatic speaker 1
may be covered with an elastic member 36 made of the same material as the elastic member 30.
According to these configurations, the possibility of the human body touching the conductive
film of the electrode 20 is further reduced, so that the possibility of an electric shock of the
human body can be further reduced.
[0029]
In the embodiment described above, one electrode 20 has a configuration in which a conductive
film is formed on one film, but the configuration of the electrode 20 is not limited to this
configuration. FIG. 7 is a bottom view of an electrode 20UA according to the present
modification. As shown in FIG. 7, in the electrode 20UA, a conductive metal is vapor-deposited on
one surface of the insulating synthetic resin film 21 such as PET or PP to form a plurality of
conductive films (conductive layers). The regions 22 are formed at intervals. In the electrode
20UA, one region 22 corresponds to one electrode 20U in the above-described embodiment.
According to this configuration, the conductive films are arranged at predetermined intervals
only by disposing the film in which the plurality of regions 22 are formed on the surface of the
elastic member 30, as in the above-described embodiment, the plurality of electrodes As
compared with the case where 20 is arranged on the elastic member 30, the electrodes to which
the acoustic signal is supplied can be easily arranged at intervals. The electrode 20L may also be
configured as shown in FIG.
[0030]
In the embodiment described above, the electrode 20U and the electrode 20L have a
04-05-2019
10
configuration in which the conductive film is formed on the surface of the film, but the
configuration of the electrode 20U and the electrode 20L is not limited to this configuration. For
example, a conductive metal plate may be used as the electrode 20U and the electrode 20L.
Alternatively, a cloth woven with conductive yarn may be formed into a rectangular shape, and
the cloth formed into a rectangular shape may be used as the electrode 20U and the electrode
20L. Alternatively, a conductive film may be formed on a substrate on which a material (for
example, glass or phenol resin) having an insulating property is formed in a plate shape to form
the electrodes 20U and 20L.
[0031]
In the embodiment described above, the shapes of the electrodes 20U and 20L when viewed
from the point on the z-axis are rectangular, but the shapes of the electrodes 20U and 20L are
not limited to rectangular. For example, it may be another shape such as a circle, an ellipse or a
polygon. The shape of the vibrator 10 as viewed in the height direction is not limited to the
rectangular shape, and may be another shape such as a circle, an oval, or a polygon. In addition,
the shape of the electrostatic speaker 1 as viewed in the height direction is not limited to the
rectangular shape, and
[0032]
In the embodiment described above, the electrodes 20U and 20L are configured to include a
plurality of holes penetrating from the front surface to the back surface, but may not be
configured to include the holes. Since the electrodes 20U and 20L are disposed spaced apart
from the adjacent electrodes, the sound generated by the vibrating body 10 is radiated to the
outside from the gap between the electrodes 20.
[0033]
In the present invention, the width in the left-right direction of the electrode 20 may be narrower
than the width in the left-right direction of the elastic member 30. In addition, the electrode 20
may be disposed so as to be located inside the elastic member 30 when viewed in the height
direction.
04-05-2019
11
[0034]
In the embodiment described above, the electrodes 20U and 20L are arranged in a plurality of
lines in the depth direction, but may be arranged in a plurality of lines in the lateral direction.
The electrodes 20U may be arranged in a matrix in the lateral direction and the depth direction
as shown in FIG. Further, in FIG. 8, the electrodes 20U are arranged in two rows in the left-right
direction, but may be arranged in three or more rows. The electrodes 20L may also be arranged
in a matrix in the lateral direction and the depth direction, similarly to the electrode 20U shown
in FIG.
[0035]
In the embodiment described above, the resistors RU and RL are configured to be included in the
electrostatic speaker 1, but the resistors RU and RL may be configured to be provided to the
drive unit 100. The resistor Rc connected to the bias power supply 70 is provided in the drive
unit 100 in the above-described embodiment, but may be provided in the electrostatic speaker 1.
[0036]
In the embodiment described above, the current value to be applied to the electrode 20 is set,
and the resistance value of the resistors RU and RL is determined from the set current value, but
the resistance values of the resistors RU and RL are calculated as described above It is not limited
to the resistance value obtained by If the current value of the current flowing through the
electrode 20 is less than the set current value, the resistance value may be larger than the
resistance value obtained by calculation.
[0037]
In the embodiment described above, the number of vibrators 10 is one, but the number of
vibrators 10 may be the same as that of the electrodes 20U. In this case, the width in the leftright direction of each vibrator 10 is the same, and the width in the depth direction is also the
same. The width in the left-right direction of one vibrating body 10 may be the same as the width
in the left-right direction of one electrode 20, and the width in the depth direction may be the
same as the width in the depth direction of the electrode 20. When the size of the electrode 20 is
04-05-2019
12
the same as that of the electrode 20, one vibrating body 10 may be sandwiched by one electrode
20U and one electrode 20L.
[0038]
In the embodiment described above, the terminal T1 of one transformer 50 is connected to the
plurality of resistors RU, and the terminal T2 of one transformer 50 is connected to the plurality
of resistors RL. The connection with the resistors RU and RL is not limited to this configuration.
For example, with respect to resistors RU and RL connected to a pair of electrodes 20U and 20L,
a configuration in which one transformer 50 is connected, that is, one drive unit 100 is
connected to each pair of resistors RU and RL The configuration may be Further, in this
configuration, the acoustic signals input to the respective driving units 100 may not be the same,
and different acoustic signals may be input to the respective driving units 100. Alternatively, the
plurality of driving units 100 may be divided into two sets, and different sound signals may be
input to one set and the other set.
[0039]
In the embodiment described above, the electrostatic speaker 1 is configured to sandwich the
vibrating body 10 between the electrode 20U and the electrode 20L. However, the electrostatic
speaker 1 is one of the front surface (or the back surface) of the vibrating body 10 It may be a
single end configuration in which a plurality of electrodes 20 are disposed only on the side of.
Also in the single-ended configuration, one resistor is connected to each of the plurality of
electrodes 20.
[0040]
In the above-described embodiment, one resistor is connected to one electrode 20. However, as
described above, a series connection, a parallel connection, or a combination of series and
parallel combination of a plurality of resistors is used. You may make it obtain the resistor of the
resistance value obtained by calculation. Also, the resistors are not limited to fixed resistors, and
may be variable resistors or semi-fixed resistors.
[0041]
04-05-2019
13
In the embodiment described above, the elastic member 30 is disposed between the electrode 20
and the vibrating body 10 so that the electrode 20 and the vibrating body 10 are not in contact
with each other, but the electrode 20 and the vibrating body 10 are The configuration for
preventing contact is not limited to the configuration of the embodiment described above. For
example, by arranging a spacer formed of an insulator between the electrode 20 and the
vibrating body 10, the electrode 20 and the vibrating body 10 may not be in contact with each
other. FIG. 9 is an exploded view of the electrostatic loudspeaker according to the present
modification. The spacers 37U and 37L are formed of an insulator, and the shape thereof is a
rectangular frame as shown in FIG. In the present embodiment, the heights of the spacer 37U
(first member) and the spacer 37L (second member) are the same. In the electrostatic speaker 1,
the electrodes 20L are fixed to the lower surface of the spacer 37L with a gap so as not to
contact each other, and the electrodes 20U are fixed to the upper surface of the spacer 37U with
a gap so as not to contact each other There is. The vibrating body 10 is fixed to the upper surface
of the spacer 37L, and the lower surface of the spacer 37U is fixed to the vibrating body 10. In
this modification, the vibrating body 10 is fixed between the spacers 37U and the spacer 37L in a
tensioned state so as not to cause slack. Further, the electrodes 20U are fixed to the spacer 37U
such that the long sides thereof are parallel to each other. Further, the electrode 20L is opposed
to the electrode 20U with the vibrating body 10 interposed therebetween, and fixed to the spacer
37L so that the long sides thereof are parallel to each other. According to this configuration, the
distance between the electrode 20 and the vibrating body 10 is maintained by the spacers 37U
and 37L, and the vibrating body 10 does not contact the electrode 20 even if it vibrates.
[0042]
In the embodiment described above, the one facing electrode 20U and the one facing electrode
20L have the same position in the left-right direction and the same position in the depth
direction when viewed from the height direction, but the positions are limited to the same
configuration It may be shifted in the depth direction, in the left and right direction, or in both
directions.
[0043]
DESCRIPTION OF SYMBOLS 1 ... Electrostatic type speaker, 10 ... Vibrator, 20, 20 U, 20 L, 20 UA
... Electrode, 30, 30 U, 30 L ... Elastic member, 35, 36 ... Elastic member, 50 · · · Transformer, 60 · ·
· input unit, 70 · · · bias power supply, 100 · · · drive unit, RU, RL · · · resistor, T1 to T3 · · ·
terminals
04-05-2019
14
Документ
Категория
Без категории
Просмотров
0
Размер файла
25 Кб
Теги
jp2012004875
1/--страниц
Пожаловаться на содержимое документа