JPH04322290A - Ultrasonic color organ - Google Patents

Abstract

PURPOSE:To offer the ultrasonic color organ which blows specificcolor mist out of ultrasonic exciters provided at corresponding positions to respective keyboards when the keyboards are operated. CONSTITUTION:When the keyboard 8 is pressed, an AC signal of frequency nearly as high as its resonance frequency is applied to a piezoelectric vibrator 1 through a switch 7 to excite the piezoelectric vibrator 1. Its vibration is propagated to a diaphragm 2, which vibrates. Specific-color liquid stored in a liquid reservoire chamber 5 is sucked up by a liquid holder 4 and supplied to the bottom surface of the diaphragm 2. Then the liquid is atomized through many holes formed in the diaphragm 2 as the diaphragm 2 vibrates. Therefore, the fineness and uniformity of atomized particles are superior and the production efficiency is good. The device is reducible in size, the power consumption is small, and the device is conveniently carried.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention sprays out a liquid of a predetermined color as mist by the elastic vibration of an ultrasonic exciter provided corresponding to each keyboard when at least a portion of the keyboard is pressed. Regarding ultrasonic color organ.

0002

2. Description of the Related Art Fountains and artificial flowers made of shape-memory alloys are common examples of devices that capture sound visually, and all of these devices operate in conjunction with musical performances. However, in both cases, the fountain does not erupt or the artificial flowers move in response to the melody played by the player.
They are based on a combination of predetermined music and devices that perform predetermined actions. In other words, the music performance and the operating equipment are separate and independent.

0003

[Problems to be Solved by the Invention] Conventionally, devices for visually capturing musical performances have been separate and independent from the musical performance and visually captured movements, and the devices operate in response to the melody played by the player. I didn't mean to.

An object of the present invention is to provide an ultrasonic color organ that uses an ultrasonic exciter to emit mist of various colors in response to the player's performance, so that even people with hearing loss can enjoy music. It's about doing.

[0005]

[Means for Solving the Problems] The ultrasonic color organ according to claim 1 is an organ that blows out mist of a predetermined color for at least a portion of the keyboard when the keyboard is pressed. The ultrasonic exciter includes a plurality of ultrasonic exciters provided in correspondence with each other, and a plurality of means for supplying liquid to each of the ultrasonic exciters. is fixed to a piezoelectric vibrator, and the liquid supply means is characterized in that it supplies a liquid of a predetermined color to each of the corresponding ultrasonic exciters.

[0006] In the ultrasonic color organ according to claim 2, the liquid supply means includes a liquid retaining material made of a sponge or other material having a large liquid absorption capacity, and a liquid storage chamber containing the liquid retaining material. It is characterized by

In the ultrasonic color organ according to claim 3, the piezoelectric vibrator is composed of a piezoelectric ceramic and electrodes formed on both sides of the piezoelectric ceramic perpendicular to the polarization axis, and the diaphragm is configured to A vibrating part is fixed on at least one surface of the piezoelectric vibrator and protrudes outward from the piezoelectric vibrator substantially parallel to the surface of the piezoelectric vibrator, and the hole is connected to the vibrating part. The diaphragm is provided in the diaphragm, and is characterized in that the opening area of one side of the diaphragm in the hole is different from the opening area of the other side.

[0008] In the ultrasonic color organ according to claim 4, the resonant frequency of the piezoelectric vibrator is approximately equal to an intermediate value of two resonant frequencies in a composite body of the piezoelectric vibrator and the diaphragm, and the piezoelectric vibrator is The child is characterized by being a rectangular plate with a length-to-width dimension ratio close to 1 but not equal to 1.

In the ultrasonic color organ according to claim 5, the piezoelectric vibrator is a columnar piezoelectric ceramic having end faces on both sides perpendicular to the polarization axis and having a hole extending parallel to the polarization axis; and electrodes fixed to each of the end faces, and the diaphragm is provided at least at one location substantially parallel to the end face at a position covering the opening of the through hole or inside the through hole, and the vibration plate A peripheral edge of the plate is fixed to the piezoelectric vibrator, a portion of the diaphragm surrounded by a fixed part fixed to the piezoelectric vibrator constitutes a vibrating part, and the hole is provided in the vibrating part. The diaphragm is characterized in that the opening area of one side of the diaphragm in the hole is different from the opening area of the other side of the diaphragm.

In the ultrasonic color organ according to claim 6, one of the resonant frequencies of the piezoelectric vibrator is approximately equal to one of the resonant frequencies of a composite of the piezoelectric vibrator and the diaphragm. , the piezoelectric vibrator is rectangular or annular, and the ratio of the length of the piezoelectric vibrator in the direction of the polarization axis to the shortest distance between the outer edge and the inner edge of the end face is approximately equal to 1.

[0011]

When the keyboard of the ultrasonic color organ according to claim 1 is pressed, an alternating current signal having a frequency approximately equal to the resonance frequency of the piezoelectric vibrator is applied to the piezoelectric vibrator,
The piezoelectric vibrator is excited. The excitation of the piezoelectric vibrator causes the diaphragm to vibrate, and the liquid of a predetermined color supplied to the diaphragm is efficiently turned into a mist of fine particles due to the effect of the holes provided in the diaphragm. Ru. Since a plurality of the ultrasonic exciters are provided, each corresponding to at least a portion of the keyboard, the respective keys are pressed by supplying liquids of different colors to the respective ultrasonic exciters. Each time, mist of various colors can be ejected along with the tone. Atomization by the action of the holes promotes fineness and uniformity of particles, and can increase atomization efficiency, so a large amount of atomization can be achieved with low power consumption, and the device can be easily downsized. can.

In the ultrasonic color organ according to the second aspect, a part of the liquid retaining material is in contact with the diaphragm, and after the liquid in the liquid storage chamber is sucked up by the liquid retaining material, the liquid is absorbed by the vibration plate. The liquid retaining material is sequentially supplied to the diaphragm from the portion in contact with the plate. According to the present invention, a stable supply of liquid can be realized at all times without being affected by increases or decreases in the liquid in the liquid storage chamber or changes in the liquid level due to vibration, so that every time a key is pressed for a certain period of time on all keys, A constant amount of mist can be sprayed at all times.

In the ultrasonic color organ according to claim 3, the piezoelectric vibrator includes the piezoelectric ceramic and electrodes formed on both surfaces of the piezoelectric ceramic perpendicular to the polarization axis. an alternating current voltage is applied to the piezoelectric vibrator via the electrode,
The vibrator is excited. By employing a pressure vibrator with such a simple structure, the ultrasonic color organ can be downsized, and moreover, this organ can atomize liquid with high efficiency. Further, since the diaphragm is integrally fixed on at least one surface of the piezoelectric vibrator, the vibrating section can bend and vibrate in the form of a cantilever with the fixed section as a fixed end. Therefore, the liquid supplied to the diaphragm is atomized by its elastic vibration and is dispersed as mist vertically above the diaphragm. The atomization of the liquid is promoted by the synergistic effect of the difference between the opening area of one side of the diaphragm and the opening area of the other side of the diaphragm in the hole and the vibration of the vibrating part, and the amount of mist generated increases. Since the diameter of the particles is uniform and minute, not only can a beautiful mist be ejected with a beautiful tone each time the key is pressed, but also a large amount of mist can be ejected, further reducing power consumption.

In the ultrasonic color organ according to claim 4, since the resonance frequency of the piezoelectric vibrator is approximately equal to the intermediate value of two resonance frequencies in the composite of the piezoelectric vibrator and the diaphragm, By applying a voltage with a common resonant frequency to the piezoelectric vibrator, the diaphragm is efficiently excited, promoting atomization efficiency and further increasing the amount of mist generated. Therefore, it is not only possible to atomize a large amount by pressing the keyboard, but also to reduce power consumption. Also,
Since the piezoelectric vibrator is a rectangular plate with a length-to-width dimension ratio close to 1 but not equal to 1, the coupled vibration of the composite of the piezoelectric vibrator and the diaphragm is enhanced,
Since the atomization efficiency is promoted, a large amount of atomization and reduction in power consumption by pressing the keyboard are promoted.

In the ultrasonic color organ according to claim 5, the piezoelectric vibrator includes a columnar piezoelectric ceramic having a hole extending parallel to the polarization axis, and electrodes fixed to each of the end faces. Thus, an alternating current voltage is applied to the piezoelectric vibrator via the electrode. Since the diaphragm is provided at least at one location covering the opening of the through hole or substantially parallel to the inside of the through hole, the vibration energy of the piezoelectric vibrator is efficiently propagated to the diaphragm. Since the diaphragm is vibrated, the atomization efficiency can be increased, so that a large amount of atomization and low power consumption can be promoted by pressing the keyboard. The portion of the diaphragm surrounded by the fixed portion fixed to the piezoelectric vibrator constitutes a vibrating portion, and the vibrating portion vibrates in combination with the piezoelectric vibrator. The supplied liquid is atomized by the combined vibration and is dispersed as a mist upward perpendicular to the diaphragm. The vibration of the vibrating section increases the atomization efficiency of the liquid and increases the amount of mist generated, so that pressing the keyboard promotes a large amount of atomization and reduces power consumption. The fineness and uniformity of the mist particles can be promoted by the action of the large number of holes provided in the vibrating part. By using a plurality of diaphragms, the fineness of the fog particles can be improved. Therefore, beautiful fog can be generated by pressing the keyboard. Since the aperture area of one side of the diaphragm in the hole is different from the aperture area of the other side, the atomization effect of the liquid is further promoted, the amount of mist generated increases, and the diameter of the particles becomes uniform. By pressing the keyboard, you can generate beautiful fog, produce a large amount of fog, and even reduce power consumption. Therefore, by employing the piezoelectric vibrator and diaphragm having such a simple structure, not only can the device be made smaller, but also the combined vibration generated in the vibrating section and the opening area of one of the holes and the opening area of the other can be reduced. Due to the synergistic effect of the different actions, the atomization action of the liquid is promoted, the amount of mist generated increases, and the particle diameter becomes uniform and fine.
By pressing the keyboard, it is possible to generate beautiful fog, generate a large amount of fog, and further reduce power consumption.

In the ultrasonic color organ according to claim 6, one of the resonant frequencies of the piezoelectric vibrator is approximately equal to one of the resonant frequencies of the composite of the piezoelectric vibrator and the diaphragm. By applying a voltage to the piezoelectric vibrator when the voltage is applied to the piezoelectric vibrator, the atomization efficiency is promoted and the amount of mist generated increases. Therefore, by pressing the keyboard, a large amount of atomization and reduction in power consumption are promoted. Further, the piezoelectric vibrator is rectangular or annular, and the ratio of the length of the piezoelectric vibrator in the direction of the polarization axis to the shortest distance between the outer edge and the inner edge of the end face is approximately 1.
By adopting a structure equal to , the combined vibration of the composite body of the piezoelectric vibrator and the diaphragm is enhanced, and the atomization efficiency is further increased. Therefore, pressing the keyboard promotes a large amount of atomization and low power consumption.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing an embodiment of an ultrasonic color organ according to the present invention. In this embodiment, a piezoelectric vibrator 1 to which terminals P and Q made of copper foil are attached, a diaphragm 2, a support plate 3, a liquid retaining material 4, a liquid storage chamber 5, and a power supply unit 6 are shown.
A switch 7 and a keyboard 8 are provided inside the main body which is divided into two chambers. A main body lid 9 is provided on the side of the main body. The main body lid 9 is used to supply liquid to the liquid storage chamber 5 and to discharge mist that flows back after atomization. The switch 7 is provided on the upper part of the power supply section 6, and the switch 7 supplies an AC voltage to the piezoelectric vibrator 1 via terminals P and Q. However, in this figure, the circuit between the power supply section 6 and the terminals P and Q is excluded.

FIG. 2 is a perspective view showing the piezoelectric vibrator 1, diaphragm 2, liquid retaining material 4, and liquid storage chamber 5 in the ultrasonic color organ of FIG. The tip of the liquid retaining material 4 is above the water surface,
It is in contact with the lower surface of the diaphragm 2. The end of the liquid retaining material 4 is fixed to the liquid storage chamber 5. The liquid storage chamber 5 is filled with a liquid of a predetermined color. The liquid retaining material 4 is made of sponge and absorbs the liquid in the liquid storage chamber 5 and comes into contact with the diaphragm 2.
The liquid is supplied to the bottom surface of the

FIG. 3 is a schematic plan view of the ultrasonic color organ of FIG. 1 viewed from above. It depicts how when one of the keys 8 is pressed, the liquid in the liquid storage chamber 5 is ejected from the top surface of the diaphragm 2 as mist.

FIG. 4 is a side view showing an ultrasonic exciter including a piezoelectric vibrator 1 and a diaphragm 2. As shown in FIG. The piezoelectric vibrator 1 has a rectangular plate-shaped piezoelectric ceramic 20, and the material of the piezoelectric ceramic 20 is TD.
Made of K72A material (product name), its length is 22mm and its width is 2.
0 mm, and the thickness is 1 mm. TDK72A material has a large electromechanical coupling coefficient and is therefore used in this example. The direction of the polarization axis of the piezoelectric ceramic 20 coincides with the thickness direction, and Au electrodes 21 and Au
An electrode 22 is formed. The Au electrode 21 is a piezoelectric ceramic 2
The Au electrode 22 covers the other surface of the piezoelectric ceramic 20. A terminal P is attached to the Au electrode 21, and a terminal Q is attached to the Au electrode 22. The terminal P and the terminal Q are arranged at one edge of the piezoelectric ceramic 20 along the width direction. A tongue-shaped diaphragm 2 is attached to one surface of the piezoelectric vibrator 1.

FIG. 5 is a plan view of the ultrasonic exciter. The diaphragm 2 is made of nickel and is fixed integrally with the piezoelectric vibrator 1 at an elongated plate-shaped fixing part 31, and the part of the diaphragm 2 that protrudes from the piezoelectric vibrator 1 is attached to the vibrating part 3.
It is 0. The fixed portion 31 is bonded to the piezoelectric vibrator 1 with an adhesive via the Au electrode 21. The diaphragm 2 has a length of 20 mm, a width of 20 mm, and a thickness of 0.05 mm. The fixed portion 31 has a length of 20 mm, a width of 3 mm, and a thickness of 0.05 mm. The vibrating portion 30 extends and projects outward from the edge of the piezoelectric vibrator 1 along the width direction in parallel to the plate surface of the piezoelectric vibrator 1 . The vibrating section 30 has a length of 17 mm, a width of 20 mm, and a thickness of 0.05 mm.

FIG. 6 is a partially enlarged plan view of the vibrating section 30 in FIG. 5, and FIG. 7 is a sectional view of the vibrating section 30 appearing when cut along a plane perpendicular to the plate surface. The vibrating section 30 is provided with a plurality of fine holes 40 penetrating through its thickness. The hole 40 has a mortar-like shape, and is used in this embodiment because one opening area is larger than the other opening area, and one opening is used as an inlet side and the other as an outlet side. The diameter on the inlet side is 0.1 mm, and the diameter on the outlet side is 0.1 mm.
02 mm, and the holes 40 are arranged at equal pitches.

When the keyboard 8 of the ultrasonic color organ shown in FIG. An AC signal having a frequency is connected to terminal P.
and is applied to the piezoelectric vibrator 1 via the terminal Q. At this time, the frequency of the AC signal almost matches the resonance frequency of the piezoelectric vibrator 1. The piezoelectric vibrator 1 is excited, and the diaphragm 2 is vibrated in the form of a cantilever beam with its fixed portion 31 as a fixed end. On the other hand, the liquid in the liquid storage chamber 5 is sucked up by the liquid retaining material 4 and reaches the lower surface of the diaphragm 2. Liquid retaining material 4
The piezoelectric vibrator 1 is made of sponge and is used in this embodiment because it not only has a large liquid absorption capacity but also has a lower acoustic impedance than the piezoelectric vibrator 1. Since the liquid retaining material 4 is made of sponge, propagation of the excitation of the piezoelectric vibrator 1 to the liquid retaining material 4 is suppressed, and the diaphragm 2 is efficiently vibrated. Liquid is supplied to the liquid storage chamber 5 by opening and closing the main body lid 9. The vibration generated in the vibrating part 30 is a bending vibration, and the elastic vibration of the vibrating part 30 effectively functions to atomize the liquid. As the vibrating section 30 vibrates, the liquid supplied to the lower surface of the diaphragm 2 is guided to each hole 40 by capillary action. When the liquid passes through each hole 40, the area through which the liquid passes through each hole 40 decreases from the inlet side to the outlet side, so that the liquid is subjected to a throttling action by the holes 40 and flows out to the upper part of the vibrating section 30. do. As a result, the liquid flowing out from the hole 40 is efficiently atomized by the aforesaid throttling action and the bending vibration of the vibrating part 30.

According to the ultrasonic color organ of this embodiment, the frequency is 114.6kHz when the applied voltage is 9.8V.
The amount of atomization is maximum at z, and the power consumption at that time is 29
4 mW, current is 30 mA. Furthermore, the power consumption of the entire device including the power supply is 588 mW, and the current is 60 mA.

FIG. 8 shows the relationship between the length of the vibrating part 30 and the amount of atomization when the length of the vibrating part 30 is changed in an ultrasonic exciter consisting of a piezoelectric vibrator 1 and a diaphragm 2. FIG. When the length of the vibrating part is 17 mm, the atomization amount shows a maximum value of 27.5 ml/min. Further, FIG. 9 is a characteristic diagram showing the relationship between the length of the vibrating section 30 and the height of the mist jet. However, the height at this time is the value of the eruption in the diagonal direction converted to the value vertically upward. The fog height reached a maximum value of 112 cm when the length of the vibrating section 30 was 17 mm.

FIG. 10 is a characteristic diagram showing the relationship between the impedance phase and frequency of the piezoelectric vibrator 1 of this embodiment.
FIG. 11 is a characteristic diagram showing the relationship between impedance phase and frequency for a composite body of piezoelectric vibrator 1 and diaphragm 2. In FIG. Since the frequency value when the phase is 0 degrees indicates the resonant frequency, the piezoelectric vibrator 1 in FIG. 10 has four resonant frequencies. fa indicates the intermediate value of two of the four resonance frequencies. In FIG. 11, the peak near fa is divided into two, producing resonance frequencies fb1 and fb2, and the intermediate value f0 indicates the frequency at which the amount of atomization becomes maximum, and f0 almost coincides with fa. In addition, the vibration part 4
As the length of 0 is shortened, fb1 and fb2 shift to the high frequency side and move away from fa, so the amount of atomization decreases.

FIG. 12 shows a piezoelectric vibrator 5 that replaces the ultrasonic exciter attached to the support plate 3 in the embodiment of FIG.
13 is a perspective view of a composite body of 0 and a diaphragm 60 (not shown in this figure), and FIG. 13 is a plan view of the composite body of FIG. 12 when viewed from the bottom side. The piezoelectric vibrator 50 has a cylindrical piezoelectric ceramic 52 having both sides perpendicular to the polarization axis as end faces and a hole extending parallel to the polarization axis, and the piezoelectric ceramic 52 is made of TDK72A material (product name). So, the diameter is 24
The through hole is also cylindrical and has a diameter of 12 mm. TDK72A material is used in this example because it has a large electromechanical coupling coefficient. An Au electrode 53 and an Au electrode 54 are provided on both end faces, respectively.
is formed. A terminal P is attached to the Au electrode 53, and a terminal Q is attached to the Au electrode 54.

A disc-shaped diaphragm 60 is attached to the lower end surface of the piezoelectric vibrator 50 at a position covering the opening of the through hole. The diaphragm 60 is made of nickel and has a ring-shaped fixed part 62.
The diaphragm 60 is integrally connected to and fixed to the piezoelectric vibrator 50, and the diaphragm 60 surrounded by the fixed part 62 forms a vibrating part 61. The fixed portion 62 is fixed to the piezoelectric vibrator 50 via the Au electrode 54. The diameter of the diaphragm 60 is 14m
m, and the thickness is 0.05 mm. The diameter of the vibrating part 61 is 12 mm, which is the same as the diameter of the through hole, and the thickness is 0.
．． 05mm. The vibrating section 61 is provided with a plurality of fine holes penetrating in its thickness direction, and the dimensions and shape of the holes are the same as the holes 40 in FIGS. 6 and 7. Note that the composite is pressed against a support base 51 made of expanded polystyrene,
A part of the support stand 51 is in pressure contact with the support plate 3.

When driving an ultrasonic color organ equipped with the composite shown in FIGS. 12 and 13 in place of the ultrasonic exciter of FIG. 1, an AC signal having a frequency equal to the resonant frequency of the composite is connected to the terminal. It is applied to the piezoelectric vibrator 50 via P and terminal Q. The piezoelectric vibrator 50 is excited, and the vibrating part 61 surrounded by the fixed part 62 vibrates in combination with the piezoelectric vibrator 50. This combined vibration of the vibrating portion 61 effectively functions to atomize the liquid.

FIG. 14 is a characteristic diagram showing the relationship between the applied voltage and frequency, and the power consumption and current at that time for the composite of FIG. 12 having three types of shapes. Type I and I
In the I type, a diaphragm is fixed to the lower end of the piezoelectric vibrator. I
Type II has the same dimensions as Type II, but the diaphragm is fixed to the upper end surface of the piezoelectric vibrator. Type II is shown in Figures 12 and 1.
This is a composite body of a piezoelectric vibrator 50 and a diaphragm 60 shown in FIG. When the applied voltage is 10.7V, the frequency is 290.6
The amount of atomization is maximum at kHz, and the power consumption at that time is 3
20mW, current is 30mA. In addition, the power consumption of the entire organ including the power supply is 642 mW, and the current is 642 mW.
It is 0mA. In addition, if the structure is the same as Type II, but a diaphragm is also provided on the top, the characteristics of Type II will be maintained and the atomization rate will be reduced, but it will be effective in generating extremely fine mist. confirmed.

[0031] In addition to this embodiment, as a liquid supply means, when the liquid is dropped onto the diaphragm 2 or the diaphragm 60, or when a liquid supply tube is used to drip the liquid onto the bottom surface of the diaphragm 2 or the diaphragm 60. Even when liquid was supplied, the same atomization effect as in this example was observed.

[0032]

[Effects of the Invention] According to the ultrasonic color organ of the present invention, the water supplied to the diaphragm, liquid of a predetermined color, is efficiently turned into a mist of fine particles by the effect of the holes provided in the vibrating part. be done. Atomization by the action of holes promotes fineness and uniformity of particles, and can increase atomization efficiency.
It is possible to generate a large amount of atomization with low power consumption, and it is also possible to generate fog that is beautiful in appearance.Furthermore, the device can be easily made smaller and lighter.

[0033] The liquid supply means includes a liquid storage chamber and a liquid retaining material for sucking up the liquid in the liquid storage chamber and supplying it to the vibrating section,
When the liquid retaining material is made of a sponge or other material with a high liquid absorption capacity, not only the efficiency of liquid supply is increased, but also stable liquid supply can be realized at all times. Therefore, stable atomization and increased atomization efficiency can be achieved.

By adopting a simple structure consisting of a piezoelectric ceramic and electrodes provided on both sides perpendicular to the polarization axis of the piezoelectric ceramic as the piezoelectric vibrator, the device can be made compact, and moreover, this device can achieve high efficiency. can atomize liquid. In addition, by adopting a structure in which the diaphragm is integrally fixed to at least one surface of the piezoelectric vibrator, the vibrating section bends and vibrates in the form of a cantilever beam with the fixed end as the fixed end. The liquid in the state of strong elastic vibration is atomized vertically upward. By employing a structure in which the opening area of one of the holes provided in the vibrating section is larger than the opening area of the other, the atomization effect is promoted. The synergistic effect of the opening area of one of the holes being different from the opening area of the other and the bending vibration of the vibrating part promotes the atomization of the liquid, increases the amount of mist generated, and increases the particle diameter. Since the particles are uniform and small, by pressing the keyboard, it is not only possible to generate fine mist with uniform particle diameters, but also a large amount of atomization is possible, which also promotes lower power consumption. Furthermore, the piezoelectric vibrator has a structure in which the intermediate value of the two resonance frequencies in the composite of the piezoelectric vibrator and the diaphragm is approximately equal to the resonance frequency of the piezoelectric vibrator, and the dimension ratio of the length and width of the piezoelectric vibrator is close to 1. Furthermore, by adopting a rectangular plate-like structure that is not equal to 1, the coupled vibration of the piezoelectric vibrator and diaphragm complex is enhanced, which further promotes atomization efficiency, resulting in a large amount of atomization and low power consumption. is promoted.

As the piezoelectric vibrator, a structure consisting of a columnar piezoelectric ceramic having a hole extending parallel to the polarization axis and electrodes provided on both end faces perpendicular to the polarization axis is adopted, and a vibration plate is used. By adopting a structure provided inside the through hole or at a position covering the opening thereof, the excitation of the piezoelectric vibrator efficiently vibrates the diaphragm, so that the atomization efficiency can be increased. Therefore, a large amount of atomization and low power consumption are promoted by pressing the keyboard. Moreover, the device can be made smaller, making it convenient to carry. By using multiple diaphragms, the fineness of the fog particles can be improved, making it possible to generate fog that looks beautiful. By adopting a structure in which the diaphragm is integrally fixed to the inside of the through hole of the piezoelectric vibrator or at a position covering the opening thereof, the vibrating part is integrated with the piezoelectric vibrator and performs coupled vibration. The liquid that comes into contact with the vibrating part that is in a state of coupled vibration is atomized vertically upward. By employing a structure in which the opening area of one of the holes provided in the vibrating section is larger than the opening area of the other, the atomization effect is promoted. The synergistic effect of the opening area of one of the holes being different from the opening area of the other and the vibration of the vibrating part promotes the atomization of the liquid, increasing the amount of mist generated and reducing the particle diameter. Because it is uniform and minute, it is possible to generate a large amount of beautiful fog with low power consumption by pressing the keyboard. Furthermore, a structure in which one of the resonant frequencies of the piezoelectric vibrator-diaphragm composite is approximately equal to one of the resonant frequencies of the piezoelectric vibrator, and a structure in which the piezoelectric vibrator has a direction of its polarization axis. By adopting a rectangular or annular structure in which the ratio of the length to the shortest distance between the outer edge and the inner edge of the end face is approximately equal to 1, the coupled vibration of the piezoelectric vibrator-diaphragm composite is enhanced. , the atomization efficiency can be further increased. Therefore, a large amount of atomization and low power consumption can be promoted by pressing the keyboard.

As the applied voltage increases, the amount of atomization also increases, so the amount of atomization can be freely changed by changing the voltage depending on the purpose. Therefore, by correlating the strength of the timbre with the increase/decrease in voltage, the strength of the timbre can be expressed by the amount of atomization.

The liquid supply means includes a liquid storage chamber, a liquid supply tube for guiding liquid from the liquid storage chamber and supplying it to the vibrating section, and an auxiliary plate facing the vibrating plate with a small gap therebetween. The atomization efficiency can be increased because the supply can be carried out efficiently without waste. Therefore, a large amount of atomization and low power consumption can be promoted by pressing the keyboard.

By employing a structure in which the liquid supply means drops liquid onto the vibrating section, the supplied liquid can be efficiently atomized, so that it is possible to promote a large amount of atomization by pressing the keyboard and to reduce power consumption.

The liquid supply means includes an auxiliary plate that faces all or part of the vibrating section with a small gap therebetween, and has a structure in which the auxiliary plate is brought into pressure contact with the piezoelectric vibrator, and a structure in which the piezoelectric vibrator and the vibrating plate are separated from each other. The ultrasonic exciter is held in a predetermined positional relationship with respect to the liquid storage tank, or is floated on the liquid storage tank by buoyancy, and the auxiliary plate is made of foamed polystyrene or other material with lower acoustic impedance than the piezoelectric vibrator. By employing the material, the excitation of the piezoelectric vibrator is efficiently propagated to the diaphragm, increasing the atomization efficiency. Therefore, a large amount of atomization and low power consumption can be promoted by pressing the keyboard.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of an ultrasonic color organ of the present invention.

2 is a perspective view showing the piezoelectric vibrator 1, diaphragm 2, liquid retaining material 4, and liquid storage chamber 5 in the ultrasonic color organ of FIG. 1. FIG.

FIG. 3 is a schematic plan view of the ultrasonic color organ shown in FIG. 1 when viewed from above.

FIG. 4 is a side view showing an ultrasonic exciter including a piezoelectric vibrator 1 and a diaphragm 2.

FIG. 5 is a plan view of the ultrasonic exciter of FIG. 4.

6 is a partially enlarged plan view of the vibrating section 30 in FIG. 5. FIG.

FIG. 7 is a cross-sectional view of the vibrating section 30 that appears when cut along a plane perpendicular to the plate surface.

FIG. 8: Characteristics showing the relationship between the length of the vibrating part 30 and the amount of atomization when the length of the vibrating part 30 is changed in an ultrasonic exciter consisting of a piezoelectric vibrator 1 and a diaphragm 2. figure.

FIG. 9 is a characteristic diagram showing the relationship between the length of the vibrating section 30 and the height of mist jetting.

FIG. 10 is a characteristic diagram showing the relationship between the impedance phase and frequency of the piezoelectric vibrator 1 of this example.

FIG. 11 is a characteristic diagram showing the relationship between impedance phase and frequency for a composite body of piezoelectric vibrator 1 and diaphragm 2.

FIG. 12 is a perspective view of a composite body of a piezoelectric vibrator 50 and a diaphragm 60.

FIG. 13 is a plan view of the complex shown in FIG. 12 when viewed from below.

14 is a characteristic diagram showing in a table the relationship between applied voltage and frequency, and the power consumption and current at that time for the composite of FIG. 12 having three types of shapes.

[Explanation of symbols]

1 Piezoelectric vibrator 2 Diaphragm 3 Support plate 4 Liquid retaining material 5 Liquid storage chamber 6 Power supply section 7 Switch 8 Keyboard 9 Main body lid 20 Piezoelectric ceramic 21 Electrode 22 Electrode 30 Vibration part 31 Fixed part 40 holes 50 Piezoelectric vibrator 51 Support stand 52 Piezoelectric ceramic 53 Electrode 54 Electrode 60　　　　diaphragm 61 Vibration part 62 Fixed part

Claims (6)

[Claims] 1. An organ that blows out mist of a predetermined color for at least a portion of the keyboard when the keyboard is pressed, comprising: a plurality of ultrasonic exciters provided respectively corresponding to at least a portion of the keyboard; A plurality of means for supplying liquid to each of these ultrasonic exciters, and the ultrasonic exciter is formed by fixing a diaphragm provided with a large number of holes to a piezoelectric vibrator, and the liquid supply means is provided in advance. An ultrasonic color organ characterized in that a liquid of a predetermined color is supplied to each of the corresponding ultrasonic exciters. 2. The liquid supply means includes a liquid retaining material made of a sponge or other material having a large liquid absorption capacity, and a liquid storage chamber for accommodating the liquid retaining material. Ultrasonic color organ. 3. The piezoelectric vibrator includes a piezoelectric ceramic and electrodes formed on both surfaces of the piezoelectric ceramic perpendicular to the polarization axis, and the diaphragm is formed on at least one surface of the piezoelectric vibrator. is fixed to the piezoelectric vibrator, and has a vibrating part that protrudes outward from the piezoelectric vibrator substantially parallel to the surface of the piezoelectric vibrator, and the hole is provided in the vibrating part, and the 3. The ultrasonic color organ according to claim 1, wherein the opening area of one side of the diaphragm is different from the area of the opening of the other side of the diaphragm. 4. A resonant frequency of the piezoelectric vibrator is approximately equal to an intermediate value of two resonant frequencies in a composite body of the piezoelectric vibrator and the diaphragm, and the piezoelectric vibrator has a length-to-width dimension ratio of 1. 4. The ultrasonic color organ according to claim 1, wherein the ultrasonic color organ is a rectangular plate close to but not equal to 1. 5. The piezoelectric vibrator includes a columnar piezoelectric ceramic whose end faces are on both sides perpendicular to the polarization axis, and a columnar piezoelectric ceramic having a hole extending parallel to the polarization axis, and an electrode fixed to each of the end faces. The diaphragm is provided in at least one location covering the opening of the through hole or inside the through hole substantially parallel to the end surface, and the periphery of the diaphragm is fixed to the piezoelectric vibrator. A part of the diaphragm surrounded by a fixed part fixed to the piezoelectric vibrator constitutes a vibrating part, and the hole is provided in the vibrating part, and the part of the diaphragm in the hole is 3. The ultrasonic color organ according to claim 1, wherein the opening area of one opening is different from the opening area of the other opening. 6. One of the resonant frequencies of the piezoelectric vibrator is approximately equal to one of the resonant frequencies of a composite body of the piezoelectric vibrator and the diaphragm, and the piezoelectric vibrator has a rectangular shape or 6. The piezoelectric vibrator has an annular shape, and the ratio of the length of the piezoelectric vibrator in the direction of the polarization axis to the shortest distance between the outer edge and the inner edge of the end surface is approximately equal to 1. Ultrasonic color organ.