JP2010028211A - Electrostatic speaker and speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To combine a plurality of speaker units without performing complicated wiring. <P>SOLUTION: When a male connector 40A is inserted to a female connector 50A, the electrode 20U of an electrostatic speaker unit 1A (1C) and an electrostatic speaker unit 1B (1D) are connected. Also, the vibration bodies 10 of both are connected with each other and the electrodes 20U of both are connected with each other. Also, when a male connector 40B is inserted to a female connector 50B, the electrode 20U of the electrostatic speaker unit 1A (1B) and the electrostatic speaker unit 1C (1D) are connected. Also, the vibration bodies 10 of both are connected with each other and the electrodes 20U of both are connected with each other. Just by simple work of inserting the male connectors 40A and 40B to the insertion port 52 of the female connectors 50A and 50B, the plurality of electrostatic speaker units are electrically connected, and the same signals are supplied to the respective electrostatic speaker units. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrostatic speaker.

  There is a speaker disclosed in Patent Document 1 as a speaker in which a plurality of speaker units are combined. In this speaker, a pentagonal panel having a recess on a side surface is connected by an elastic body fitted in the recess, and a speaker unit is disposed in a hole in the center of each panel. According to this configuration, a large speaker or a three-dimensional speaker can be configured by a plurality of panels on which the speaker unit is provided.

JP 2006-333227 A

  By the way, in the speaker disclosed in Patent Document 1, the speaker units attached to the respective panels are independent from each other. For this reason, wiring for supplying signals to the speaker units must be performed for each speaker unit, and there is a problem that wiring becomes troublesome when the number of speaker units increases.

  The present invention has been made under the above-described background, and an object of the present invention is to provide a technique that enables a combination of a plurality of speaker units without complicated wiring.

  In order to solve the above-described problems, the present invention provides a first electrode having conductivity, a second electrode having conductivity and spaced apart from the first electrode, and having conductivity. A vibrating body disposed between the first electrode and the second electrode and spaced apart from the first electrode and the second electrode, and a terminal connected to the first electrode, the vibrating body, and the second electrode And a female connector having a terminal connected to the first electrode, the vibrating body, and the second electrode.

In this invention, you may have a connection means to connect with an adjacent electrostatic speaker unit.
In the present invention, the connecting means may be capable of changing an angle formed by the connected electrostatic speaker units.
In the present invention, the male connector may have flexibility.

  In addition, the present invention includes a plurality of electrostatic speaker units having any one of the above-described configurations, and the male connector of the electrostatic speaker unit is fitted into a female connector of another adjacent electrostatic speaker unit. System in which the first electrode of the speaker unit is electrically connected, the vibrating body of each electrostatic speaker unit is electrically connected, and the second electrode of each electrostatic speaker unit is electrically connected I will provide a.

  According to the present invention, it is possible to combine a plurality of speaker units without performing complicated wiring.

[Embodiment]
FIG. 1 is an external view of an electrostatic speaker unit 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the electrostatic speaker unit 1. FIG. 3 is a top view of a speaker system S obtained by connecting a plurality of electrostatic speaker units 1.

(Configuration of electrostatic speaker unit 1)
First, the electrostatic speaker unit 1 constituting the speaker system S will be described.
As shown in the figure, the electrostatic speaker unit 1 includes a vibrating body 10, electrodes 20U and 20L, and spacers 30U and 30L. The electrostatic speaker unit 1 includes male connectors 40A and 40B and female connectors 50A and 50B. In addition, the dimensions of each component in the figure are different from the actual dimensions so that the shape of the component can be easily understood, and “•” is indicated in “○” in the figure. Means an arrow from the back of the drawing to the front.

(Configuration of each part of the electrostatic speaker unit 1)
The vibrating body 10 is obtained by, for example, depositing a conductive metal on a film such as PET (polyethylene terephthalate) or PP (polypropylene, polypropylene) or applying a conductive paint. The thickness is about several μm to several tens of μm.

  The spacers 30U and 30L are formed of an insulator, and the shape thereof is a rectangular frame shape. In the present embodiment, the lengths of the spacers 30U and 30L in the X direction and the Y direction are the same as the lengths of the electrodes 20U and 20L in the X direction and the Y direction. Further, the heights of the spacer 30U and the spacer 30L in the Z direction are the same.

  The electrodes 20U and 20L are formed by processing a conductive plate-like metal into a rectangle. In the electrodes 20U and 20L, a plurality of through holes 21 penetrating from the front surface to the back surface are provided at predetermined intervals in order to ensure sound transmission. In the present embodiment, the lengths of the electrodes 20U and 20L in the X direction and the Y direction are longer than the lengths of the vibrating body 10 in the X direction and the Y direction.

  The male connectors 40A and 40B are flexible sheet-like connectors in which terminals formed of copper foil are sandwiched between insulating films, and have terminals 41A to 41C. In addition, in both surfaces of male connector 40A, 40B, as shown in FIG. 1, terminal 41A-41C is exposed by the edge part.

  Female connectors 50A and 50B are connectors into which male connectors 40A and 40B are fitted. The female connectors 50A and 50B have an insertion port 52 into which the male connectors 40A and 40B are inserted. Inside the insertion port 52, the terminals 41A to 41A exposed at the ends of the fitted male connectors 40A and 40B. It has terminals 51A-51C which contact 41C.

(Structure of electrostatic speaker unit 1)
Next, the structure of the electrostatic speaker unit 1 will be described. In the electrostatic speaker unit 1, the periphery of the vibrating body 10 is sandwiched between the spacer 30 </ b> U and the spacer 30 </ b> L and is fixed to the spacers 30 </ b> U and 30 </ b> L. The spacer 30U and the spacer 30L are fixed to each other.
In the electrostatic speaker unit 1, the electrode 20U is fixed to the spacer 30U, the electrode 20L is fixed to the spacer 30L, and the electrode 20U and the electrode 20L are opposed to each other with the spacer 30U and the spacer 30L interposed therebetween. 10 with a gap.

  Further, in the electrostatic speaker unit 1, one end of the male connectors 40A and 40B is located between the spacer 30U and the spacer 30L, and the terminal 41A at this position is connected to the electrode 20U by a wiring (not shown). The terminal 41B is connected to the vibrating body 10, and the terminal 41C is connected to the electrode 20L. The other ends of the male connectors 40A and 40B are located outside the frame-shaped spacers 30U and 30L. In the present embodiment, the male connector 40A is disposed on one of the side surfaces along the Y direction of the electrostatic speaker unit 1, and the male connector 40B is disposed on one of the side surfaces along the X direction.

  As for the female connectors 50A and 50B, the female connector 50A is disposed on the side surface opposite to the side surface on which the male connector 40A is located, and the female connector 50B is disposed on the side surface opposite to the side surface on which the male connector 40B is located. Yes. The opening 52 of each female connector is directed to the opposite side of the spacers 30U and 30L. And the terminal 51A of each female connector is connected to the electrode 20U by a wiring (not shown), the terminal 51B is connected to the vibrating body 10, and the terminal 51C is connected to the electrode 20L.

(Configuration of speaker system S)
Next, a speaker system S obtained by connecting the electrostatic speaker unit 1 will be described.
As shown in FIG. 3, the speaker system S includes male connectors 40A and 40B inserted into the insertion ports 52 of the female connectors 50A and 50B, and the electrostatic speaker unit having the same configuration as the electrostatic speaker unit 1 described above. 1A-1D is connected.
When connecting the electrostatic speaker units 1A to 1D as shown in FIG. 3, the end of the male connector 40A of the electrostatic speaker unit 1D is the insertion port 52 of the female connector 50A of the adjacent electrostatic speaker unit 1C. The end of the male connector 40B is inserted into the insertion port 52 of the female connector 50B of the adjacent electrostatic speaker unit 1B.
The male connector 40A of the electrostatic speaker unit 1B is inserted into the insertion port 52 of the female connector 50A of the electrostatic speaker unit 1A, and the insertion port 52 of the female connector 50B of the electrostatic speaker unit 1A is electrostatically charged. The male connector 40B of the type speaker unit 1C is inserted.

  When the male connector 40A is inserted into the insertion port 52 of the female connector 50A, the terminal 51A contacts the terminal 41A at the insertion port 52, and the electrode 20U of the electrostatic speaker unit 1A (1C) and the electrostatic speaker unit 1B. The (1D) electrode 20U is electrically connected. In addition, at the insertion port 52, the terminal 51B and the terminal 41B are in contact with each other, and the vibrating body 10 of the electrostatic speaker unit 1A (1C) and the vibrating body 10 of the electrostatic speaker unit 1B (1D) are electrically connected. The terminal 51C and the terminal 41C are in contact with each other, and the electrode 20L of the electrostatic speaker unit 1A (1C) and the electrode 20L of the electrostatic speaker unit 1B (1D) are electrically connected.

  When the male connector 40B is inserted into the insertion port 52 of the female connector 50B, the terminal 51A and the terminal 41A come into contact with each other in the insertion port 52, and the electrode 20U of the electrostatic speaker unit 1A (1B) and the electrostatic speaker. The electrode 20U of the unit 1C (1D) is electrically connected. In addition, at the insertion port 52, the terminal 51B and the terminal 41B are in contact with each other, and the vibrating body 10 of the electrostatic speaker unit 1A (1B) and the vibrating body 10 of the electrostatic speaker unit 1C (1D) are electrically connected. The terminal 51C and the terminal 41C are in contact with each other, and the electrode 20L of the electrostatic speaker unit 1A (1C) and the electrode 20L of the electrostatic speaker unit 1B (1D) are electrically connected.

As described above, in the present embodiment, the connection between the electrostatic speaker units 1 is a simple operation of simply inserting the male connectors 40A and 40B into the insertion ports 52 of the female connectors 50A and 50B. The speaker unit 1 can be easily connected.
In the present embodiment, the male connectors 40A and 40B are inserted into the insertion ports 52 of the female connectors 50A and 50B without performing a complicated operation of wiring from the transformer 110 to each electrostatic speaker unit. With a simple operation, it is possible to electrically connect a plurality of electrostatic speaker units and supply the same signal to each of the electrostatic speaker units.

(Electrical configuration of the speaker system S)
Next, the electrical configuration of the speaker system S will be described with reference to FIG.
FIG. 4 is a diagram showing an electrical configuration of the speaker system S connected as shown in FIG. The transformer 110 shown in FIG. 4 boosts a signal input to the primary side and outputs the boosted signal to the secondary side. The input unit 100 to which an acoustic signal is input from the outside is connected to the primary side. The secondary side is connected to the terminals 41A and 41C of the male connector 40A of the electrostatic speaker unit 1A. In addition, the bias power source 120 that applies a DC bias to the vibrating body 10 has a positive side connected to the terminal 41B of the male connector 40A of the electrostatic speaker unit 1A and a negative side connected to the midpoint of the secondary side of the transformer 110. .
In this configuration, when an acoustic signal is input to the input unit 100, the input acoustic signal is boosted by the transformer 110 and applied to the electrodes 20U and 20L of the electrostatic speaker unit 1A.

  As shown in FIG. 4, the electrodes 20U of each electrostatic speaker unit are connected to each other via a terminal 51A and a terminal 41A. Further, the vibrating bodies 10 of the respective electrostatic speaker units are also connected to each other via the terminals 51B and 41B, and the electrodes 20L of the respective electrostatic speaker units are also connected to each other via the terminals 51C and 41C. For this reason, the voltage applied from the transformer 110 to the electrode 20U of the electrostatic speaker unit 1A is also applied to the electrodes 20U of the electrostatic speaker units 1B to 1D and applied to the electrode 20L of the electrostatic speaker unit 1A. The applied voltage is also applied to the electrodes 20L of the electrostatic speaker units 1B to 1D. The voltage applied from the bias power source 120 to the vibrating body 10 of the electrostatic speaker unit 1A is also applied to the vibrating body 10 of the electrostatic speaker units 1B to 1D.

(Operation of speaker system S)
Next, the operation of the speaker system S will be described.
When an acoustic signal input to the input unit 100 is supplied to the transformer 110 and a potential difference is generated between the electrode 20U and the electrode 20L of each electrostatic speaker unit due to the voltage applied from the transformer 110, each electrostatic In the type speaker unit, an electrostatic force that draws the vibrating body 10 toward the electrode 20U or the electrode 20L acts on the vibrating body 10.

  For example, when an acoustic signal is input to the input unit 100 and a positive voltage is applied to each electrode 20U, and a negative voltage is applied to each electrode 20L, a positive voltage is applied to each vibrator 10 by the bias power source 120. Since the voltage is applied, the portion of the vibrating body 10 between the electrode 20U and the electrode 20L repels the electrode 20U to which a positive voltage is applied, while being attracted to the electrode 20L to which a negative voltage is applied. Thus, the electrode 20L is displaced.

  Next, when an acoustic signal is input to the input unit 100, a negative voltage is applied to each electrode 20U, and a positive voltage is applied to each electrode 20L, each vibrator 10 is an electrode to which a positive voltage is applied. While repelling 20L, it is attracted to the electrode 20U to which a negative voltage is applied and displaced toward the electrode 20U.

  In this way, each vibrating body 10 is displaced (flexed) according to the acoustic signal, and the displacement direction is sequentially changed to generate vibration, and sound according to the vibration state (frequency, amplitude, phase) is generated. Generated from 10. The generated sound passes through at least one of each electrode 20U side or each electrode 20L side and is radiated to the outside of each electrostatic speaker unit 1.

  In this embodiment, since the electrostatic speaker unit 1 is connected by a connector and can be easily released, it can be easily disassembled and carried when not in use.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the present invention may be implemented by modifying the above-described embodiment as follows.

In FIG. 3, four electrostatic speaker units are connected to each other, but the number of electrostatic speaker units to be connected is not limited to four, and is three or less or five or more. Also good. Note that the size of the speaker system S can be freely set by connecting as many electrostatic speaker speaker units as desired.
In FIG. 3, the speaker system S is square, but when connecting a plurality of electrostatic speaker units 1, the shape of the speaker system S viewed from above may be rectangular. Alternatively, it may be a pyramid type. Further, the electrostatic speaker unit 1 may be arbitrarily connected, and the shape of the speaker system S may be a shape other than these shapes or a character shape.

In the embodiment described above, the size of each electrostatic speaker unit constituting the speaker system S is the same, but the size of the electrostatic speaker unit is not the same, and there are multiple types of sizes. May be.
In addition, the shape when the electrostatic speaker unit 1 is viewed from above is a rectangle in the above-described embodiment, but may be a polygon instead of a rectangle.

In the embodiment described above, the flexible male connectors 40A and 40B are inserted into the female connectors 50A and 50B. However, the male connectors 40A and 40B have rigidity, and the female connectors 50A and 50B are connected to the female connectors 50A and 50B. You may make it provide the fall prevention mechanism of a male connector.
In the above-described embodiment, the female connectors 50A and 50B are positioned on the side surfaces of the spacers 30U and 30L. However, the female connectors 50A and 50B may be embedded in the spacers 30U and 30L.

In the female connector according to the present invention, a switch for switching conduction / non-conduction between the terminal 51A and the electrode 20U, between the terminal 51B and the vibrating body 10, and between the terminal 51C and the electrode 20L is provided. Also good.
According to this configuration, in the case of the speaker system S shown in FIG. 3, the electrostatic speaker unit 1A and the electrostatic speaker unit 1B are electrically disconnected, and the electrostatic speaker unit 1C and the electrostatic speaker unit 1C are electrostatically disconnected. The speaker unit 1D can be electrically disconnected.
If separate acoustic signals are supplied to the male connector 40B of the electrostatic speaker unit 1A and the male connector 40B of the electrostatic speaker unit 1B, the sound radiated from the electrostatic speaker units 1A and 1C, The sound radiated from the electric speaker units 1B and 1D can be made different.
In the above-described embodiment, the speaker system S has the electrostatic speaker units arranged in two rows and two columns, but the electrostatic speaker units may be arranged in three or more rows.
In this case, as described above, the connector switch is operated so that electrical connection is made only in the same row, and the electrostatic speaker unit in a certain row has a low-frequency acoustic signal, the electrostatic type in a certain row. A mid-range acoustic signal may be supplied to the speaker unit, and a high-frequency acoustic signal may be supplied to a certain column of the electrostatic speaker unit, so that the reproduced sound band may be different for each column.
In the present invention, conduction / non-conduction between the terminal 41A and the electrode 20U, between the terminal 41B and the vibrating body 10, and between the terminal 41C and the electrode 20L is achieved not only in the female connector but also in the male connector. A switch for switching may be provided.

In the present invention, in order to maintain the connection of the electrostatic speaker unit in the speaker system S, the male joint 60 and the female joint 70 (connection means) shown in FIG. 5 are attached to the side surface of the electrostatic speaker unit. Also good.
The male joint 60 includes a cylindrical columnar part 61 made of synthetic resin, and a support part 62 that is provided on the peripheral surface of the cylindrical part and supports the cylindrical part 61. On the other hand, the female joint 70 includes a connecting portion 71 having a shape in which a part of a ring formed of a synthetic resin is cut out with a certain width, and a support portion 72 provided on the peripheral surface of the connecting portion 71 and supporting the connecting portion 71 It consists of
The connecting portion 71 is made of a synthetic resin and has elasticity. When the cylindrical portion 61 is pushed into the notch portion of the connecting portion 71, the cylindrical portion 61 is positioned inside the connecting portion 71. It is also possible to rotate the connecting portion 71 around the cylindrical portion 61 by sliding the connecting portion 71 on the surface of the cylindrical portion 61, and the connecting portion 71 has elasticity and is pushed in. Since 61 is tightened and fixed to the cylindrical portion 61, the connecting portion 71 can be fixed in an arbitrarily rotated state.

As described above, in the configuration in which the female connectors 50A and 50B are embedded in the spacers 30U and 30L and do not protrude from the spacers 30U and 30L, the male joint 60 is arranged on both sides of the female connector 50A and both sides of the female connector 50B. The joint 70 may be disposed on both sides of the male connector 40A and both sides of the male connector 40B. Thus, if the male joint 60 and the female joint 70 are arranged on the side surface of the electrostatic speaker unit, the male connectors 40A and 40B connected to the female connectors 50A and 50B are flexible and bend. The three-dimensional speaker system S can also be configured by connecting the electrostatic speaker units at an angle as shown in FIG. 6 with the male joint 60 and the female joint 70.
Note that the joint that connects the electrostatic speaker units is not limited to the shape shown in FIG. 5, and may have another shape as long as the connection can be maintained.

In the electrostatic speaker units 1A to 1D, the male joint 60 is disposed on both sides of the female connector 50A and the female connector 50B, and the female joint 70 is disposed on both sides of the male connector 40A and both sides of the male connector 40B. You may make it arrange | position to.
Thus, if the male joint 60 and the female joint 70 are arranged on the side surface of the electrostatic speaker unit, in the speaker system S, the male connector 40A and the female connector 50A are connected to each other so that the male connector 40A and the female connector 50A are connected. Thus, electrical connection is realized, and the female joint 70 on both sides of the male connector 40A and the male joint 60 on both sides of the female connector 50A are connected to realize mechanical connection.
In addition, the male connector 40B and the female connector 50B are connected to achieve electrical connection between the male connector 40B and the female connector 50B, the female joint 70 on both sides of the male connector 40B, and the female connector 50B. The mechanical joint is realized by connecting the male joints 60 on both sides.
Here, the length of the male connectors 40A and 40B is made longer than the length of the female connectors 50A and 50B, and when the male connector and the female connector are connected, the male connectors 40A and 40B are exposed from the female connectors 50A and 50B and bent. When configured so that the male speaker 60 and the female joint 70 are connected to each other at an angle as in the case of FIG. 6, the male connectors 40 </ b> A and 40 </ b> B bend due to flexibility, and the three-dimensional speaker. The system S can also be configured.

  In the present invention, when it is not desired to electrically connect adjacent electrostatic speaker units, since the male connectors 40A and 40B have flexibility, the male connectors 40A and 40B are bent. You may make it not insert in the insertion port 52 of adjacent female connector 50A, 50B.

In the embodiment described above, the electrostatic speaker unit 1 has two male connectors and two female connectors, but has a male connector 40A and a female connector 50A, and has a male connector 40B and a female connector 50B. The structure which does not do may be sufficient.
Moreover, the structure which has the male connector 40A and the female connector 50B, and does not have the male connector 40B and the female connector 50A may be sufficient.
Moreover, the structure which has the male connector 40B and the female connector 50A, and does not have the male connector 40A and the female connector 50B may be sufficient.
Further, the speaker system S is formed by connecting those having only the male connector 40A and the female connector 50A, those having only the male connector 40A and the female connector 50B, and those having only the male connector 40B and the female connector 50A. May be configured.

1 is an external view of an electrostatic speaker unit 1 according to an embodiment of the present invention. 1 is a cross-sectional view of an electrostatic speaker unit 1. FIG. It is a top view of speaker system S concerning one embodiment of the present invention. It is the figure which showed the electrical constitution of the speaker system. It is an external view of the male joint 60 and the female joint 70 which concern on the modification of this invention. It is a side view when the electrostatic speaker unit which has the male joint 60 and the female joint 70 is connected.

Explanation of symbols

1, 1A to 1D ... electrostatic speaker unit, 10 ... vibrating body, 20U, 20L ... electrode, 30U, 30L ... spacer, 40A, 40B ... male connector, 41A-41C .... Terminals, 50A, 50B ... female connectors, 51A-51C ... terminals, 60 ... male joint, 70 ... female joint, 100 ... input section, 110 ... transformer, 120 ... Bias power supply

Claims (5)

A first electrode having conductivity;
A second electrode having conductivity and spaced apart from the first electrode;
An oscillating body that is electrically conductive and is spaced from the first electrode and the second electrode between the first electrode and the second electrode;
A male connector having a terminal connected to the first electrode, the vibrating body and the second electrode;
An electrostatic speaker unit comprising: a female connector having the first electrode, the vibrator, and a terminal connected to the second electrode.   The electrostatic speaker unit according to claim 1, further comprising a connecting unit that connects to an adjacent electrostatic speaker unit.   The electrostatic speaker unit according to claim 2, wherein the connecting unit is capable of changing an angle formed by the connected electrostatic speaker units.   The electrostatic speaker unit according to claim 1, wherein the male connector has flexibility.   A plurality of electrostatic speaker units according to any one of claims 1 to 4, wherein the male connector of the electrostatic speaker unit is fitted into a female connector of another adjacent electrostatic speaker unit, The first electrode of the electrostatic speaker unit is electrically connected, the vibrating body of each electrostatic speaker unit is electrically connected, and the second electrode of each electrostatic speaker unit is electrically connected. Speaker system.

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