KR102277583B1 - loudspeaker apparatus of acoustic guitar - Google Patents

Abstract

The present invention relates to a sound loudspeaker for an acoustic guitar,
The acoustic guitar is equipped with a resonance box by combining the front and rear sounding boards, and the front and rear sounding boards as side sounding boards, and a pickup, an equalizer and a piezoelectric speaker are built into the internal space of the acoustic guitar,
One side of each string is wound around the tuning bolt of the head of the acoustic guitar and the other side is fixed to the bridge attached to the surface of the front sounding board,
The 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,
A 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 performance sound passed through the pickup improves the frequency characteristic while passing through the equalizer,
Accurate playing sound close to the original sound by allowing the electric signal of the playing sound through the above equalizer to be amplified through the low-power piezoelectric speaker attached to the inner wall of the guitar to minimize vibration and then radiate through the sounding board hole of the acoustic guitar It is configured so that it can be amplified and output by more than 10dB.

Description

Acoustic guitar sound loudspeaker

The present invention relates to a sound loudspeaker for an acoustic guitar, and more particularly, in an acoustic guitar, a pickup device for electrically absorbing and transmitting guitar sound is installed on the bottom of a saddle of a bridge, and the electric voice After improving the frequency characteristics of the signal while passing through the equalizer installed inside the guitar, the amplified voice is output from the guitar through the piezoelectric speaker mounted on the inner wall of the guitar to minimize vibration, so that the performance of the acoustic guitar is improved. It relates to an acoustic guitar loudspeaker that amplifies the performance sound closest to the original sound by more than 10dB and then outputs it.

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 the string instrument in a taut state or rubbing it with a bow, etc., and the body of the string instrument is a resonator. This is because the sound is generated by resonance.

That is, a conventional 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 hanging on a single plane parallel to the surface of the body are each installed in an extended state. .

Here, since the bridge attached to the body and supporting a plurality of strings serves to pull the strings taut, they must be securely attached and installed on the surface of the body, otherwise the vibrations of the strings are not accurately transmitted to the body. An undesirable sound will be generated.

And the acoustic guitar, which is widely used by the public, generates sound by bouncing strings, and it can be applied to a variety of genres of music compared to other instruments, and the acoustic guitar is more accessible than other string instruments such as cello, violin, etc. Because it is easy, it is relatively widely used compared to other string instruments.

These guitars are largely acoustic guitars, acoustic guitars, bass guitars, classical guitars, electric guitars, and the like, and so forth.

The double acoustic guitar largely consists of a body that generates resonance due to the sound of strings, a neck fixed to one side of the body and arranged so that the strings can be used to catch chords according to scales and chords, It consists of a head joined 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 and folk guitars using metal (iron) strings are mainly called acoustic guitars, and they sound different from classical guitars using nylon strings.

The sound is produced mainly through the body, but guitars with pickups, which are electric devices, are connected to an amplifier at concerts or performances to amplify the sound and output it.

That is, the output is induced by attaching a pickup serving as a preamplifier to the body of the guitar using electricity, and the 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 just below each string to generate a voltage in the conductive coil, so that the voltage is appropriately amplified and transmitted to a speaker or the like.

Acoustic guitars that produce sound through the above body, Woollimtong, have low volume, so in order to perform in a wide space, a microphone was installed in front of the Woollimtong to amplify the sound of the microphone through a loudspeaker, so that many people could hear it. .

And since the pickup of the guitar using the 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, Japanese Patent Laid-Open No. 2003-029745 (memory electronic sound generating electric acoustic guitar) dated January 31, 2003 has been proposed,

This is a small built-in small built-in electric acoustic guitar by configuring so that the stored electronic tone generated from the speaker installed in the electric acoustic guitar body is 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 audio source device, and it is simple to operate and produces many kinds of electronic tones.

And on May 08, 2002, Japanese Patent Registration No. 03087241 (a musical instrument with built-in amplifier and loudspeaker in an acoustic guitar and a microphone to enjoy playing stories) was proposed,

This is configured so that a vocal microphone and an acoustic guitar microphone are input to the amplifier built into the acoustic guitar, respectively, so that the sound is amplified and sound effects can be obtained compared to the mounted speaker (loudspeaker).

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

This made a guitar with accompaniment music, amp, speaker, and instrument itself integrated like a digital piano, so there is no need to carry an amp, speaker, and accompaniment audio device when playing the guitar. .

However, since the electronic sound source and the speaker are built-in inside the conventional acoustic guitar as described above, it performs the function of the electronic acoustic guitar, so it is not possible to enjoy the acoustic guitar sound by the general acoustic guitar, and the built-in speaker is a general loudspeaker. Since it is a loud speaker, electricity consumption is high, so there is a problem that it can be used for a short time even if it is used in a state to receive power directly or a large-capacity battery is built-in.

On the other hand, the registered utility model No. 20-0463616 (amplifier for an acoustic guitar) has been proposed on November 08, 2012, which, as shown in FIG. 1,

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

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

It is in close contact with the coupling jaw 115 of the coupling part 110, the cross section is formed to be curved in a trapezoidal shape, and consists of an amplifying part 120 having a reflective groove 121 formed therein,

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

However, according to the conventional amplification device for a through-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 generated by the front plate 102, the back plate 103, and the side plate. When it is reflected from the 104 and emitted to the reverberation groove 101, it collides with the amplification unit 120 coupled to the reverberation groove 101, and some of the sound reflected by the collision is emitted to the reverberation groove 101 and is acoustically sound. The sound inside the guitar 105 is collected in the trapezoidal-shaped amplifying unit 120 and radiated back to the reverberation groove 101, so that the sound quality is excellent and the sound is amplified, but the sound inside the acoustic guitar 105 is reverberated. While the amplifying unit 120 blocks the sound emitted to the groove 101, only the sound that moves to the resonating groove 101 through the entrance of the narrow amplifying unit 120 is emitted to the outside, so the amplification effect is caused by the sound disappearing from the inside. Not only was it insufficient, but it had the disadvantage that it had little effect in a large space.

In addition, there was a problem in that the use time was short to use the speaker with a built-in battery due to the high power consumption of the speaker, so that it could not be used efficiently.

Accordingly, the present invention is to solve the conventional problems as described above, by installing a pickup device that electrically absorbs and transmits the guitar sound on the bottom of the saddle of the bridge in an acoustic guitar, and Acoustic guitar performance 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 the piezoelectric speaker mounted on the inner wall of the guitar to minimize vibration The purpose of the present invention is to provide a sound amplification device for acoustic guitars that amplifies the playing sound closest to the original sound by more than 10dB and then outputs it.

The acoustic guitar sound amplification device of the present invention for achieving the above object,

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

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

The 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,

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 performance sound passed through the pickup improves the frequency characteristic while passing through the equalizer,

Accurate performance sound close to the original sound by allowing the electric signal of the playing sound to pass through the equalizer to be amplified through a low-power piezoelectric speaker attached to the inner wall of the guitar to minimize vibration and then radiate through the sounding board hole of the acoustic guitar. It is configured so that it can be amplified and output by more than 10dB.

According to the acoustic guitar sound loudspeaker according to the present invention, a pickup device that electrically absorbs and transmits the guitar sound is installed on the bottom of the saddle of the bridge in the acoustic guitar to generate an electrical signal of the playing sound. to convert,

Amplify the playing sound by more than 10dB by improving the frequency characteristics of the above electric voice signal while passing through the equalizer installed inside the guitar, then amplifying it in the piezoelectric speaker and outputting it from the amplified guitar through the sounding board hole After that, you can print it out.

The piezoelectric speaker mounted on the inner wall of the acoustic guitar to minimize vibration has the effect of outputting an accurate performance sound by amplifying and outputting the playing sound closest to the original sound according to the performance without being affected by the vibration. .

1 is a schematic diagram showing the configuration of an amplifying device for a conventional 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 an enlarged schematic view of a part of an acoustic amplification apparatus according to an embodiment of the present invention;
6 is a block diagram showing a configuration for the operation of the present invention.

Hereinafter, preferred embodiments 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 the front sounding board (2) and the rear sounding board (3), and the front and rear sounding boards (2) and (3) are combined with the side sounding board (4) to provide a resonance box while having a pickup (5) and an equalizer ( 6) and the amplifier (7) and the piezoelectric speaker (10) are built into the internal space (8) of the acoustic guitar (1),

One side of each string 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 board 2,

The saddles 15 of the bridge 14, which are attached to the surface of the front sounding board 2 by a coupling means such as an adhesive, support each string 11,

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

The electrical signal of the performance sound passed through the pickup (5) improves the frequency characteristics while passing through the equalizer (6),

The electric signal of the playing sound passing through the equalizer 6 and the amplifier 7 is amplified through the piezoelectric speaker 10 of low power consumption and then emitted through the soundboard hole 9 of the acoustic guitar 1 By doing so, accurate performance sound close to the original sound can be amplified and output by more than 10dB

The piezoelectric speaker 10 was configured by coupling a fixing screw 39 so as to protrude toward the rear surface of the piezoelectric speaker 10 and fastening the screw to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 .

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

A cone-shaped second metal diaphragm 41 is bonded to the end junction 33 of the convex portion 32 in which the outer circumferential surface of the first metal diaphragm 31 is bent to enable double amplification,

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

The electrodes of the first and second ceramic plates 34 and 36 are coated with conductive silver powder to form first and second conductive layers 35 and 37, 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 it from being damaged and to enable continuous operation even when the first ceramic plate 34 is damaged,

A fixing screw 39 is attached to the center of the phosphor plate 38 in an adhesive manner to be coupled to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 by screwing,

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

The positive (+) electrode 43 is connected to the conductive layers 35 and 37 of the first and second ceramic plates 34 and 36 , and at the same time the end joint portion 33 of the first metal diaphragm 31 is connected. ) by connecting the negative (-) electrode 44 to minimize the resistance of vibration while receiving the electrical signal of the playing sound 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 the charging jack not shown in the drawing through the charging connector 21 , the charging/discharging battery 23 built into the internal space 8 of the acoustic guitar 1 . ) to be charged and the power or electrical signal required for the pickup 5, equalizer 6, amplifier 7, and piezoelectric speaker 10 is supplied by the power of the battery 23.

The acoustic guitar sound loudspeaker of the present invention configured as described above uses the acoustic guitar (1) as a front sounding plate (2) and a rear sounding plate (3), and the front and rear sounding plates (2) and (3) as a side sounding plate (4). The pickup (5), the equalizer (6), the amplifier (7), the piezoelectric speaker (10), the charging part (22), and the charging/discharging battery (23) are installed in the internal space ( 8) to be built-in.

In the charging unit 22, which receives power supplied from the outside via the charging jack through the charging connector 21, charges and plays the charging/discharging battery 23 built in the internal space 8 of the acoustic guitar 1 make it possible

One side of each string 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 board 2 .

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

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

The electrical signal of the performance sound passed through the pickup 5 improves the frequency characteristic while passing through the equalizer 6 .

The electric signal of the playing sound passing through the equalizer 6 and the amplifier 7 is amplified through the piezoelectric speaker 10 of low power consumption and then emitted through the soundboard hole 9 of the acoustic guitar 1 do.

That is, the piezoelectric speaker 10 amplifies the electric voice signal output through the equalizer 6 and the amplifier 7 with low power consumption and outputs it so that you can hear the accurate performance of a loud sound,

A cone-shaped second metal diaphragm 41 is bonded to the end junction 33 of the convex portion 32 in which the outer circumferential surface of the first metal diaphragm 31 is bent to enable double amplification.

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

Electrodes of the first and second ceramic plates 34 and 36 are coated with conductive silver powder to form first and second conductive layers 35 and 37, respectively.

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

A fixing screw 39 is attached to the center of the phosphor plate 38 in an adhesive manner to be coupled to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 by screwing the piezoelectric speaker ( As the vibration of 10) is transmitted to the acoustic guitar (1), a phenomenon in which the vibration caused by the amplification is reduced is prevented to increase the amplification effect.

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

The positive (+) electrode 43 is connected to the conductive layers 35 and 37 of the first and second ceramic plates 34 and 36 , and at the same time the end joint portion 33 of the first metal diaphragm 31 is connected. ) by connecting the negative (-) electrode 42 to the positive (+) electrode 43 to receive the electrical signal of the playing sound from the equalizer 6 and the amplifier 7 while minimizing the resistance of vibration. However, due to the contact portion of the signal line coupled to the negative (-) electrode 44, the vibration of the first and second ceramic plates 34 and 36 and the first metal diaphragm 31 is not affected, so that the correct sound is played. to make amplification of the electrical signal of

Therefore, the ceramic plate 40 and the first and second metal diaphragm diaphragms 31 and 41 are efficiently amplified and the acoustic guitar 1 emits an accurate sound close to the original sound by making it radiate through the resonator hole 9 of the acoustic guitar 1 . It is possible to amplify the playing sound by more than 10dB and output it.

Moreover, since the piezoelectric speaker 10 has a characteristic of low power consumption, the performance can be completed even with the power charged in the battery 23, and thus the performance can be completed without separately connecting a 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 from the rear surface of the piezoelectric speaker 10 is applied. The piezoelectric piezoelectric speaker 10 prevents the vibration of the piezoelectric speaker 10 from being directly transmitted to the acoustic guitar 1 by fastening the bolts 65 and 66 to the central fixing hole 25 of the support piece 24 and coupling them. All of 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, a preferred embodiment of the present invention has been shown and described, but the present invention is not limited to the above-described embodiment, and it is common in the field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Any person skilled in the art can implement various modifications, and such modifications are within the scope of the described claims.

1: acoustic guitar body 5: pickup
6: Equalizer 8: Sounding board hole speaker
10: piezoelectric 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 the front sounding board (2) and the rear sounding board (3) and the front and rear sounding boards (2) and (3) by the side sounding board (4) to have a resonance box,
One side of each string (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 board (2),
The saddles 15 of the bridge 14 attached to the surface of the front sounding board 2 support each string 11,
A pickup 5 is installed to recognize the vibration of the string 11 at the lower end of the saddle 15 to convert the playing sound into an electrical signal,
The electrical signal of the performance sound passed through the pickup (5) improves the frequency characteristic 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 soundboard hole 9 of the acoustic guitar 1 is inserted. In the acoustic guitar sound loudspeaker to be emitted through the
The piezoelectric speaker 10 described above,
A cone-shaped second metal diaphragm 41 is joined to the end junction 33 of the convex portion 32 in which the outer circumferential surface of the first metal diaphragm 31 is bent,
The first and second ceramic plates 34 and 36, which are piezoelectric elements, are attached to the outer and inner surfaces of the convex portion 32 of the first metal diaphragm 31 to amplify the electrical signal of the playing sound,
Electrodes of the first and second ceramic plates 34 and 36 are coated with conductive silver powder to form first and second conductive layers 35 and 37, respectively,
The phosphorus 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,
A fixing screw 39 is coupled to the center of the phosphor plate 38 and coupled to the mounting base 40 fixedly installed on the inner surface of the acoustic guitar 1 by screwing,
A cover 42 for preventing dust inflow and high frequency vibration is attached to the open portion of the outer surface of the first metal diaphragm 31,
The positive electrode 43 is connected to the conductive layers 35 and 37 of the first and second ceramic plates 34 and 36, and the end joint portion 33 of the first metal diaphragm 31 is connected. A sound loudspeaker for an acoustic guitar, characterized in that it is configured to receive an electric signal of the playing sound from the equalizer (6) and the amplifier (7) by connecting the negative (-) electrode (44) to the to minimize the vibration resistance.

Images