KR20210023366A - loudspeaker apparatus of acoustic guitar - Google Patents

Abstract

The present invention relates to a loudspeaker of an acoustic guitar. An acoustic guitar is provided with a resonance box by combining the front and rear sounding boards with side sounding boards. A pickup, equalizer, and piezoelectric speaker are embedded in an interior space of the acoustic guitar. One side of each string is wound around a tuning bolt of the head of the acoustic guitar and the other side is fixed to a bridge attached to a surface of the front sounding board. A saddle of the bridge, which is attached to the surface of the front sounding board by a bonding means such as an adhesive, supports each string. The pickup is installed at the bottom of the saddle to recognize the vibration of the string so that the playing sound is converted into an electrical signal. The electrical signal of the playing sound passed through the pickup improves the frequency characteristics while passing through the equalizer. By making the electric signal of the playing sound through the equalizer amplified through the piezoelectric speaker of low power consumption attached to the inner wall of the guitar to minimize vibration and then radiating through a sounding board hole of the acoustic guitar, the loudspeaker is configured to amplify and output an accurate performance sound close to the original sound by more than 10 dB.

Description

Loudspeaker apparatus of acoustic guitar

The present invention relates to a sound amplification device for an acoustic guitar, and more particularly, in an acoustic guitar, a pickup device for electrically absorbing and transmitting the sound of the guitar is installed on the bottom of the birds of the bridge, and the electric sound is described above. The amplified voice is output from the guitar through a piezo piezoelectric speaker installed to minimize vibrations on the inner wall of the guitar after improving the frequency characteristics while passing through the equalizer installed inside the guitar. The present invention relates to a sound amplification device of an acoustic guitar capable of outputting after amplifying the played sound closest to the original sound by 10 dB or more.

In general, a string instrument is a type of musical instrument that produces sound using a plurality of strings, and the sound is produced by bouncing a string fixed to the body of a string instrument in a taut state or by rubbing it with a bow, etc., and the body of the string instrument is a resonance body. Because it is composed of, the sound is generated by the resonance phenomenon.

That is, a conventional stringed instrument is largely composed of a body, a neck part, and a head, and between the head and the bridge connected to the body, a plurality of strings extending in a single plane parallel to the surface of the body are installed in an elongated state. .

Here, the bridge attached to the body and supporting a plurality of strings must be firmly attached and installed on the surface of the body because it serves to pull the strings tightly, otherwise the vibration of the strings cannot be accurately transmitted to the body. This is an undesirable sound.

In addition, acoustic guitars, which are widely used in the public, generate notes while bounced on strings, and can be applied to various genres of music compared to other instruments, and acoustic guitars have accessibility compared to other string instruments such as cello, violin, and so on. Because of its ease, it is relatively widespread compared to other string instruments.

These guitars are largely varied in types, such as ventilated guitars, acoustic guitars, bass guitars, classical guitars, and electric guitars.

The double ventilated guitar has a body that generates a resonant sound by resonating largely by strings (strings), and a neck that is fixed to one side of the body and in which strings are arranged so that the chords according to the scale and harmony can be caught using the strings, It consists of a head that is bonded to the end of the neck so that the pitch of the string can be adjusted.

Acoustic guitars are manufactured with 6-string strings, and guitars including barrel guitars and folk guitars using metal (metal) strings are mainly called acoustic guitars, and they sound different from classical guitars using nylon strings.

Mainly, the sound is produced through the body, a sound tube, but a guitar equipped with an electric device, a pickup, is connected to an amplifier at a concert or performance site to amplify and output the sound.

That is, a pickup that acts as a preamplifier is attached to the body of the guitar using electricity to induce output, and a guitar using electricity is usually equipped with a pickup composed of a plurality of magnetic elements having a wound conductive coil. , The pickup is installed directly under each string to generate a voltage in the conductive coil, and accordingly, the voltage is appropriately amplified and transmitted to a speaker or the like.

The acoustic guitar that makes a sound through the above body, the Ulimtong, has a low volume, so to perform in a large space, a microphone is installed in the front of the Ulimtong so that many people can hear the sound after amplifying the sound of the microphone through a loudspeaker. .

And since the pickup of the guitar using electricity is installed in a state exposed to the outside, it can be easily damaged, and thus it is difficult to generate a good sound.

Thus, on January 31, 2003, Japanese Patent Publication No. 2003-029745 (memory electronic sound generating electric acoustic guitar) was proposed.

This is a small built-in electronic tone that can be mounted on an electric acoustic guitar by configuring the stored electronic tone generated from the speaker installed in the electric acoustic guitar body to be detected by the pickup, the signal is output from the pickup output jack, and output as various electronic sounds through the amplifier. The playing and musical characteristics of the electric acoustic guitar are improved by the size of the sound source device, and it is made to operate simply and to generate many kinds of electronic tones.

On May 08, 2002, Japanese Patent Registration No. 03087241 (a musical instrument in which an amplifier and a speaker (loudspeaker) are embedded in an acoustic guitar, and a microphone is installed to enjoy the story of playing) was proposed.

This is configured so that the vocal microphone and the acoustic guitar microphone are input to the amplifier built into the acoustic guitar, so that the sound is amplified and sound effects are obtained more than the installed speaker (loudspeaker).

In addition, Patent Publication No. 10-2010-0091340 filed on August 19, 2010 (amplifier, speaker, sound source chip, digital music file, electric guitar including a microcomputer) has been proposed,

This, like a digital piano, was constructed to improve portability by making a guitar with accompaniment music, amplifier, speaker, and instrument itself as an integrated unit, so that you do not have to carry an amplifier, speaker, and accompaniment audio device when playing the guitar. .

However, by the structure in which an electronic sound source and a speaker are built into the conventional acoustic guitar as described above, it performs the function of an electronic acoustic guitar, so it is not possible to enjoy the ventilation guitar sound of a general acoustic guitar, and the built-in speaker is a general loudspeaker. Since it is a loud speaker, there is a problem in that it can only be used for a short time even if it is used in a state in which it is directly supplied with power because it consumes electricity or a large-capacity battery is built-in.

On the other hand, a utility model registered on November 08, 2012 No. 20-0463616 (amplification device for a sound acoustic guitar) was proposed, as shown in FIG.

It is formed of a front plate 102 having a certain size of the ring groove 101, a back plate 103 installed on the rear of the front plate 102, and a side plate 104 connecting the front plate 102 and the back plate 103, and In the amplifying device for a sound acoustic guitar that is coupled to the acoustic guitar 105 that is formed as an empty space to amplify the sound,

A locking plate positioned inside the acoustic guitar 105 and formed to be caught in the sounding groove 101, and having an inner groove 111 corresponding to the sounding groove 101 and a cutout 112 formed therein (113), and a coupling plate 114 formed to be curved in a vertical direction to the locking plate 113, and a coupling jaw formed by being connected to the coupling plate 114 and having a'b' shape in cross section ( 115) and the coupling portion 110 is formed;

Consisting of an amplifying part 120 in close contact with the coupling jaws 115 of the coupling part 110 and formed to be curved in a trapezoidal shape and having a reflective groove 121 formed therein,

The coupling plate 114 of the coupling portion 110 is configured by forming a protrusion 117 downward while forming a plurality of fixed jaws 116 spaced apart from the locking plate 113 at a predetermined interval.

However, with the conventional amplifying device for a sound acoustic guitar as described above, when a user makes a sound using a string coupled to the acoustic guitar 105, the sound generated inside is the front panel 102, the back panel 103, and the side panel. When reflected from (104) and radiated to the ringing groove 101, it collides with the amplification unit 120 coupled to the ringing groove 101, and some of the sound that is reflected by bumping is radiated to the ringing groove 101 and thus acoustic The sound inside the guitar 105 is collected in the trapezoidal amplifying unit 120 and radiated back to the resonant groove 101, so that the sound quality is excellent as well as the sound is amplified, but the sound inside the acoustic guitar 105 resonates. While the amplifying unit 120 blocks the sound emitted to the groove 101, only the sound that moves to the ringing groove 101 through the entrance of the narrow amplifying unit 120 is emitted to the outside, so the amplification effect due to the sound disappearing from the inside Not only was it inadequate, but it had the disadvantage that its effect was almost ineffective in a large space.

In addition, there is a problem in that the power consumption of the speaker is high, so that the use time is short to use in a state of the built-in battery, so that it cannot be used efficiently.

Accordingly, the present invention is to solve the conventional problems as described above, and in an acoustic guitar, a pickup device that electrically absorbs and transmits the sound of the guitar is installed on the bottom of the birds of the bridge. The acoustic guitar is played by improving the frequency characteristics of the voice signal while passing through the equalizer installed inside the guitar, and then outputting the amplified voice from the guitar through a piezo piezoelectric speaker installed to minimize vibration on the inner wall of the guitar. It is an object of the present invention to provide a sound amplification device for an acoustic guitar capable of outputting after amplifying the played sound closest to the original sound by 10dB or more.

The sound expansion value of the acoustic guitar of the present invention for achieving the above object,

The acoustic guitar is equipped with a resonance box by combining the front and rear sounding boards and the front and rear sounding boards with the side sounding boards, while the pickup, equalizer and piezoelectric speaker are built into the interior space of the acoustic guitar,

One side of each string is wound around the tuning bolt of the head of an acoustic guitar, and the other side is fixed to the bridge attached to the surface of the front soundboard,

The saddle of the bridge attached to the surface of the front sounding plate by a bonding means such as an adhesive to support each string,

Install a pickup to recognize the vibration of the string at the bottom of the saddle to convert the playing sound into an electrical signal,

The electrical signal of the sound played through the pickup above improves the frequency characteristics while passing through the equalizer,

The electric signal of the sound played through the above equalizer is amplified through a piezoelectric speaker with low power consumption attached to minimize vibration on the inner wall of the guitar, and then radiated through the hole in the sound plate of an acoustic guitar, making it an accurate playing sound close to the original sound. It is configured to amplify 10dB or more and output it.

According to the acoustic guitar sound amplification device according to the present invention, a pickup device for electrically absorbing and transmitting the sound of the guitar is installed on the bottom of the birds of the bridge in the acoustic guitar to generate an electric signal of the playing sound. Convert it,

The above electrical audio signal is amplified by a piezoelectric speaker after improving the frequency characteristics while passing through the equalizer installed inside the guitar, and then amplified by the amplified guitar through the sounding plate hole to amplify the playing sound by more than 10dB. You can print it after you have done it.

Through a piezoelectric speaker installed to minimize vibration on the inner wall of an acoustic guitar, the sound that is closest to the original sound from the performance can be amplified and then output without the effect of vibration, so that accurate performance sound can be output. .

1 is a schematic diagram showing the configuration of a conventional amplifying device for a sound acoustic guitar,
Figure 2 is a perspective view showing the external configuration of the acoustic guitar of the present invention,
Figure 3 is a cross-sectional view showing the internal structure of the acoustic guitar of the present invention.
4 is a schematic diagram showing the configuration of an acoustic amplification device according to an embodiment of the present invention.
5 is a schematic diagram showing an enlarged part of an acoustic amplification device according to an embodiment of the present invention.
Figure 6 is a block diagram showing a configuration for the operation of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

2 and 3 show the configuration of an acoustic guitar according to the present invention,

The acoustic guitar (1) is combined with a front sounding plate (2) and a rear sounding plate (3), and the front and rear sounding plates (2) (3) with a side sounding plate (4) to provide a resonance box while having a pickup (5) and an equalizer ( 6) and the amplifier 7 and piezoelectric speaker 10 to be built into the inner space 8 of the acoustic guitar 1,

One side of each of the strings 11 is wound around the tuning bolt 13 of the head 12 of the acoustic guitar 1, while the other side is fixed to the bridge 14 attached to the surface of the front soundboard 2,

The saddle 15 of the bridge 14 attached to the surface of the front sounding plate 2 by a bonding means such as an adhesive to support each string 11,

At the bottom of the saddle 15, a pickup 5 is installed to recognize the vibration of the string 11 to convert the playing sound into an electrical signal,

The electrical signal of the sound played through the pickup (5) is to improve the frequency characteristics while passing through the equalizer (6),

The electric signal of the sound played through the equalizer 6 and the amplifier 7 is amplified through the piezoelectric piezoelectric speaker 10 with low power consumption, and then radiated through the sounding plate hole 9 of the acoustic guitar 1. By doing so, it is possible to amplify and output an accurate playing sound close to the original sound by more than 10dB.

The piezoelectric speaker 10 was configured by combining the fixing screw 39 so as to protrude to the rear surface of the acoustic guitar 1 by screwing it to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1.

4 and 5 show the configuration of a piezoelectric speaker 10 according to an embodiment of the present invention,

A second metal diaphragm 41 in a cone shape is bonded to the end joint 33 of the convex portion 32 that is bent on the outer circumferential surface of the first metal diaphragm 31 to enable double amplification,

First and second ceramic plates 34 and 36, which are piezoelectric elements, are attached to the outer and inner surfaces of the convex portions 32 of the first metal diaphragm 31 to amplify the electrical signal of the playing sound,

Conductive silver powder is applied to the electrodes of the first and second ceramic plates 34 and 36 so that the first and second conductive layers 35 and 37 are formed, respectively,

A phosphor copper plate 38, which is an alloy of phosphorus (P) and copper (Cu), is adhered to the conductive layer 35 of the first ceramic plate 34, and the first ceramic plate 34 is vibrated for a long time. ) To protect from being damaged, and to enable continuous operation even when the first ceramic plate 34 is damaged,

In the center of the copper plate 38, a fixing screw 39 is bonded to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 by screwing,

A cover 42 is attached to an open portion of the outer surface of the first first metal diaphragm 31 to prevent the inflow of dust,

A positive electrode 43 is connected to the center of the conductive layers 35 and 37 of the first and second ceramic plates 34 and 36, and an end joint of the first metal diaphragm 31 The negative electrode 44 is connected to (33) to minimize the resistance of vibration, and the electric signal of the playing sound is transmitted from the equalizer (6) and the amplifier (7).

6 shows a block configuration for an operation according to the present invention,

In the charging unit 22 that receives power supplied from the outside through a charging jack (not shown in the drawing) through the charging connector 21, the charging/discharging battery 23 built in the internal space 8 of the acoustic guitar 1 ) Is charged to the pickup 5, the equalizer 6, the amplifier 7, and the piezoelectric speaker 10 by the power of the battery 23.

The acoustic guitar of the acoustic guitar of the present invention configured as described above is used as an acoustic guitar (1) as a front sounding plate (2) and a rear sounding plate (3), and the front and rear sounding plates (2) (3) as a side sounding plate (4). Combined to provide a resonance box, the pickup 5, the equalizer 6, the amplifier 7, the piezo piezoelectric speaker 10, the charging unit 22, and the charging/discharging battery 23 are integrated into the internal space of the acoustic guitar 1 ( It should be built in 8).

In the charging unit 22 that receives power supplied from the outside through the charging jack through the charging connector 21, the charging and discharging batteries 23 built in the internal space 8 of the acoustic guitar 1 are charged and played. To be able to do it.

One side of each of the strings 11 is wound around the tuning bolt 13 of the head 12 of the acoustic guitar 1 and the other side is fixed to the bridge 14 attached to the surface of the front sounding plate 2.

The saddle 15 of the bridge 14, which is attached to the surface of the front sounding plate 2 by means of a bonding means such as an adhesive, supports each string 11.

A pickup 5 is installed at the lower end of the saddle 15 to recognize the vibration of the string 11 to convert the playing sound into an electrical signal.

The electrical signal of the sound played through the pickup 5 improves the frequency characteristics while passing through the equalizer 6.

The electric signal of the sound played through the equalizer 6 and the amplifier 7 is amplified through the piezoelectric piezoelectric speaker 10 with low power consumption, and then radiated through the sounding plate hole 9 of the acoustic guitar 1. do.

That is, the piezoelectric speaker 10 amplifies and outputs the electric voice signal output through the equalizer 6 and the amplifier 7 with low power consumption, so that the accurate playing sound of a large sound can be heard,

The second metal diaphragm 41 in the shape of a cone is bonded to the end joint 33 of the convex portion 32 where the outer circumferential surface of the first metal diaphragm 31 is bent to enable double amplification.

First and second ceramic plates 34 and 36, which are piezoelectric elements, are attached to the outer and inner surfaces of the convex portions 32 of the first metal diaphragm 31 to amplify the electrical signal of the playing sound.

Conductive silver powder is applied to the electrodes of the first and second ceramic plates 34 and 36 so that the first and second conductive layers 35 and 37 are formed, respectively.

A copper plate 38, which is an alloy of phosphorus (P) and copper (Cu), is adhered to the conductive layer 35 of the first ceramic plate 34 to prevent the first ceramic plate 34 from being damaged by vibration for a long time. At the same time, the electrical connection is maintained even when the first ceramic plate 34 is damaged, so that continuous operation is possible.

In the center of the copper plate 38, a fixing screw 39 is bonded to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 by screwing the piezo piezoelectric speaker ( As the vibration of 10) is transmitted to the acoustic guitar (1), it prevents the phenomenon that the vibration caused by the loudness decreases, thereby enhancing the loudspeaker effect.

A cover 42 is attached to an open portion of the outer surface of the first first metal diaphragm 31 to prevent inflow of dust.

A positive electrode 43 is connected to the center of the conductive layers 35 and 37 of the first and second ceramic plates 34 and 36, and an end joint of the first metal diaphragm 31 While minimizing the resistance of vibration by connecting a negative electrode 42 to (33), an electric signal of the playing sound is transmitted from the equalizer 6 and the amplifier 7 so that the positive electrode ( It does not affect the vibration of the first and second ceramic plates 34, 36 and the first metal diaphragm 31 due to the contact part of the signal line coupled to the 43) or negative electrode 44. This makes it possible to amplify the electrical signal of the playing sound.

Therefore, it is efficiently amplified through the ceramic plate 40 and the first and second metal diaphragm diaphragm plates 31 and 41 and radiates through the sounding plate hole 9 of the acoustic guitar The performance sound is amplified by more than 10dB and can be output.

Moreover, since the piezoelectric speaker 10 has a characteristic of low power consumption, the performance can be finished even with the power charged in the battery 23, so that the performance can be simply used without connecting a separate power line.

The bent portions of both ends of the support piece 24 are fixed to the inner surface of the acoustic guitar 1 and the bolt portion 63 of the elastic support piece 61 protruding to the rear surface of the piezo piezoelectric speaker 10 Piezo piezoelectricity by preventing the vibration of the piezoelectric speaker 10 from being directly transmitted to the acoustic guitar 1 by fastening it with bolts 65 and 66 to the central fixing hole 25 of the support piece 24 All the vibrations generated in the amplification process of the speaker 10 are used to amplify the playing sound, so that the amplified playing sound can be clearly output and heard.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the above-described embodiments, and is not departing from the gist of the present invention claimed in the claims. Anyone with knowledge can implement various modifications, as well as such modifications will be within the scope of the described claims.

1: acoustic guitar body 5: pickup
6: equalizer 8: sounding plate hole speaker
10: piezo piezoelectric 11: string
14: bridge 15: saddle
31: first metal diaphragm diaphragm 40: ceramic plate
41: second diaphragm diaphragm 51: support plate
61: elastic support piece

Claims (1)

The acoustic guitar (1) is combined with a front sounding plate (2) and a rear sounding plate (3), and the front and rear sounding plates (2) (3) with a side sounding plate (4) to provide a resonance box.
One side of each of the strings 11 is wound around the tuning bolt 13 of the head 12 of the acoustic guitar 1, while the other side is fixed to the bridge 14 attached to the surface of the front soundboard 2,
The saddle 15 of the bridge 14 attached to the surface of the front sounding plate 2 is to support each string 11,
At the bottom of the saddle 15, a pickup 5 is installed to recognize the vibration of the string 11 to convert the playing sound into an electrical signal,
The electrical signal of the sound played through the pickup (5) is to improve the frequency characteristics while passing through the equalizer (6),
After the electric signal of the playing sound amplified while passing through the amplifier 7 in the equalizer 6 is amplified through the piezoelectric speaker 10 of low power consumption, the sounding plate hole 9 of the acoustic guitar 1 is opened. In the sound amplification device of an acoustic guitar to be radiated through,
The piezoelectric speaker 10 described above,
A second metal diaphragm 41 in a cone shape is bonded to the end bonding portion 33 of the convex portion 32 where the outer circumferential surface of the first metal diaphragm 31 is bent,
First and second ceramic plates 34 and 36, which are piezoelectric elements, are attached to the outer and inner surfaces of the convex portions 32 of the first metal diaphragm 31 to amplify the electrical signal of the playing sound,
Conductive silver powder is applied to the electrodes of the first and second ceramic plates 34 and 36 so that the first and second conductive layers 35 and 37 are formed, respectively,
A copper plate 38 is adhered to the conductive layer 35 of the first ceramic plate 34 so that the electrical connection of the first ceramic plate 34 is maintained,
In the center of the copper plate 38, a fixing screw 39 is coupled to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 by screwing it,
A cover 42 for preventing dust inflow and high frequency vibration is attached to an open portion of the outer surface of the first metal vibration plate 31,
An end joint of the first metal diaphragm 31 while connecting a positive electrode 43 to the center of the conductive layers 35 and 37 of the first and second ceramic plates 34 and 36 ( 33) by connecting the negative electrode 44 to minimize the vibration resistance to receive the electric signal of the playing sound from the equalizer 6 and the amplifier 7 Device.

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