Pickup and pickup system of string instrument

Abstract

The utility model belongs to the field of musical instruments, and discloses a pickup and a pickup system of a string instrument, and the pickup comprises a string audio oscillator which is installed on the string instrument and is used for providing a magnetic field for a metal string of the string instrument; the input end of the pickup module is electrically connected with the metal chord line, and the pickup module is used for collecting current signals generated when the metal chord line cuts the magnetic field. According to the utility model, the string audio oscillator is installed on the string instrument, the metal string cuts a magnetic induction line generated by the string audio oscillator in a vibration process, so that the metal string generates a current signal, and the current signal is transmitted to the pickup module to output an audio signal; the audio signals are amplified by an adjustable audio amplifier of the pickup system, the amplified audio signals are sent to a sounder through different transmitting units, and the sounder plays the audio signals; the sound pick-up is used for picking up audio signals of the string instrument, noise interference of the external environment is avoided, distortion-free amplified original sound of the instrument is achieved, and the sound pick-up has the advantage of being low in manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the field of musical instruments, and particularly relates to a pickup and a sound pickup system for stringed instruments. Background Art

[0002] Stringed instruments are further divided into bowed string instruments and plucked string instruments. Music lovers always hope to hear music that not only has increased volume but also retains high-quality and wonderful sounds, even exceeding the original sound quality. In current technology, microphones and speakers are commonly used to increase the volume of stringed instruments, but the distortion of the sound quality also increases, and the microphone is also affected by distance changes and environmental noise. The applicant often sees large bands where dozens of musicians play or accompany beautiful music and songs under the unified command of the band conductor, bringing musical enjoyment to the audience.

[0003] In a band, generally, there are the most people playing the erhu or the violin because the volume of bowed string instruments is too small and multiple people need to cooperate to adapt to the effect of the accompaniment.

[0004] Many stringed instruments produce wonderful and unique sounds. However, due to the structural design of stringed instruments, even if the sound quality is good, the sound attenuation is significant at a slightly greater distance. Using a wireless microphone to amplify the sound through a speaker is prone to environmental interference due to distance changes, and is accompanied by a large distortion and a lack of aesthetic sound. The prior art cannot achieve maintaining the original noise-free and high-quality music, and even exceeding the original sound quality. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pickup and a sound pickup system for stringed instruments to solve the problem of large distortion of sound quality in the prior art when using a wireless microphone to amplify the sound through a speaker.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a pickup for stringed instruments, and the pickup includes:

[0008] A string audio oscillator, installed on the stringed instrument, for providing a magnetic field for the metal strings of the stringed instrument;

[0009] A sound pickup module, the input end of which is electrically connected to the metal string, for collecting the current signal generated by the metal string cutting the magnetic field and outputting an audio signal.

[0010] Preferably, the stringed instrument is a guitar, and the string audio oscillator includes: a mounting plate, which is trapezoidal in structure. A number of magnetic tiles are inlaid on the mounting plate, and all the magnetic tiles are trapezoidally distributed. The length direction of the magnetic tiles is parallel to the metal strings, and the metal string with the highest pitch of the guitar is close to the widest lower bottom edge of the mounting plate.

[0011] Preferably, all the magnetic tiles have the same magnetic pole on the same plane of the mounting plate, and the total width of all the magnetic tiles in the width direction of the mounting plate is greater than the distance between the two outermost metal strings of the guitar.

[0012] Preferably, the stringed instrument is an erhu, and the string audio oscillator includes: a jacket, on which a magnetic block or a group of magnet pieces is inlaid. One side of the magnetic block or the group of magnet pieces is a magnetic pole, and one side plane of the magnetic block or the group of magnet pieces is parallel to the metal strings of the erhu; a bonding surface is provided on the clamping surface of the jacket, and a bonding sleeve for bonding the bonding surface is provided on the erhu rod.

[0013] Preferably, the pickup module includes: a lead wire, a pickup signal input jack, an electrolytic capacitor, a battery power supply, a power switch, and a signal output connector;

[0014] The lead wire is used to connect the metal string to the pickup signal input jack. The first end of the pickup signal input jack is electrically connected to the positive electrode of the electrolytic capacitor, the negative electrode of the electrolytic capacitor is electrically connected to the first end of the power switch, the second end of the power switch is electrically connected to the negative electrode of the battery power supply, and the positive electrode of the battery power supply and the second end of the pickup signal input jack are both electrically connected to the signal output connector.

[0015] In a second aspect, the present invention provides a pickup system for a stringed instrument, and the system includes:

[0016] The above-mentioned pickup of the stringed instrument;

[0017] An adjustable audio amplifier, the input end of which is electrically connected to the output end of the pickup module of the pickup, and is used to amplify the audio signal output by the pickup module and adjust the amplification factor of the audio signal, and output the amplified audio signal;

[0018] A sounder, on which an audio wire connection hole is provided. An audio wire is electrically connected to the audio wire connection hole, the input end of the audio wire is electrically connected to the output end of the adjustable audio amplifier, and the sounder is used to play the amplified audio signal output by the adjustable audio amplifier.

[0019] Preferably, the system further includes: a transmitting unit, the input end of which is electrically connected to the output end of the adjustable audio amplifier, and the signal transmitting end of the transmitting unit is electrically connected to the signal receiving end of the sounder;

[0020] The transmitting unit includes: a frequency modulation transmitter, a Bluetooth transmitter, and a high-frequency transmitter.

[0021] Preferably, the system further includes: a packaging box for packaging the adjustable audio amplifier, the pickup module of the pickup, and the frequency modulation transmitter; the packaging box is provided with a pickup signal input jack of the pickup module and a signal output jack of the adjustable audio amplifier, and the signal output connector of the pickup module is electrically connected to the audio input jack of the adjustable audio amplifier; the frequency modulation transmitter is installed on the window of the packaging box, close to the adjustable audio amplifier, and the input end of the frequency modulation transmitter is electrically connected to the signal output jack of the adjustable audio amplifier;

[0022] The packaging box is further provided with: a DC external input socket, a power switch of the pickup module, and a knob, a frequency modulation button display screen of the adjustable audio amplifier;

[0023] The DC external input socket is electrically connected to the battery power supply of the pickup module, and the knob is used to manually adjust the amplification factor of the adjustable audio amplifier for the audio signal.

[0024] Preferably, when the stringed instrument is a guitar, the packaging box is bonded to the rear panel of the guitar bridge; when the stringed instrument is an erhu, the packaging box is provided with a connecting component, and the packaging box is installed on the support plate of the erhu through the connecting component.

[0025] Preferably, the connecting component includes: a foldable U-shaped plate, the outer wall of the middle plate of the U-shaped plate is adhesively connected to the packaging box, magnetic snap fasteners are inlaid on the two side plates of the U-shaped plate, strip-shaped iron sheets are inlaid on the outer walls of both sides of the support plate along the length direction, and the strip-shaped iron sheets and the magnetic snap fasteners on the side plates form a magnetic attraction fit.

[0026] Beneficial effects:

[0027] By installing a string audio oscillator on the stringed instrument, the metal string cuts the magnetic induction lines generated by the string audio oscillator during vibration, which can generate an electric current signal in the metal string. The electric current signal of the metal string is transmitted to the pickup module for preliminary amplification and an audio signal is output; the audio signal is amplified again by the adjustable audio amplifier, and the amplified audio signal is sent to the sounder to play the audio signal; the audio signal of the stringed instrument is picked up by the pickup, without being interfered by the noise of the external environment, realizing the original sound of the instrument with distortion-free amplification, and having the advantage of low manufacturing cost. The utility model is applicable to most types of stringed instruments with different structures. Brief Description of the Drawings

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the description, together with the following specific embodiments, to explain the embodiments of the present utility model, but do not constitute a limitation to the embodiments of the present utility model. In the accompanying drawings:

[0029] Figure 1 is a structural block diagram of a pickup of a stringed instrument provided by an embodiment of the present utility model;

[0030] Figure 2 is a schematic layout diagram of a metal string and a string audio oscillator of a guitar provided by an embodiment of the present utility model

[0031] Figure 3 is a schematic structural diagram of a string audio oscillator adapted to a guitar provided by an embodiment of the present utility model;

[0032] Figure 4 is a schematic assembly diagram of a guitar and a pickup provided by an embodiment of the present utility model;

[0033] Figure 5 is a schematic structural diagram of a string audio oscillator adapted to an erhu provided by an embodiment of the present utility model;

[0034] Figure 6 is a schematic assembly diagram of an adhesive sleeve and the neck of an erhu provided by an embodiment of the present utility model;

[0035] Figure 7 is another schematic structural diagram of a string audio oscillator adapted to an erhu provided by an embodiment of the present utility model;

[0036] Figure 8 is a schematic external view of a packaging box provided by an embodiment of the present utility model;

[0037] Figure 9 is a schematic assembly diagram of a packaging box and an erhu provided by an embodiment of the present utility model;

[0038] Figure 10 is a schematic structural diagram of a U-shaped plate provided by an embodiment of the present utility model;

[0039] Figure 11 is an unfolded schematic diagram of a U-shaped plate provided by an embodiment of the present utility model;

[0040] Figure 12 is a structural block diagram of a sound pickup system of a stringed instrument provided by an embodiment of the present utility model;

[0041] Figure 13 is a schematic diagram of a sounder and a transmitting unit provided by an embodiment of the present utility model.

[0042] Description of the reference numerals:

[0043] 0, adjustable audio amplifier; 1, string audio oscillator; 2, pickup module; 3, transmitting unit; 4, sounder; 5, metal string; 6, guitar; 7, erhu; 8, fiddle stick; 9, support plate; 10, encapsulation box; 11, U-shaped plate; 12, magnetic snap fastener; 13, bar-shaped iron sheet; 14, frequency modulation button display screen; 15, knob; 16, DC external input jack; 17, frequency modulation transmitter; 18, signal output jack; 19, audio input jack;

[0044] 101, mounting plate; 102, magnetic sheet; 0101, jacket; 0102, magnetic block; 0103, bonding surface; 0104, bonding sleeve;

[0045] 201, lead wire; 202, pickup signal input jack; 203, electrolytic capacitor; 205, battery power supply; 206, power switch; 207, signal output connector;

[0046] 301, spare transmitter; 303, Bluetooth transmitter; 304, high-frequency transmitter;

[0047] 401, frequency modulation signal receiving switch; 402, Bluetooth signal receiving switch; 403, high-frequency signal receiving plug hole; 404, audio wire connection hole; 405, spare receiving switch. Detailed implementation manners

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0049] Embodiment 1

[0050] Figure 1 is a structural block diagram of a pickup for a stringed instrument provided by an embodiment of the present invention. As Figure 1 shown, this embodiment provides a pickup for a stringed instrument, and the pickup includes:

[0051] A string audio oscillator 1, installed on the stringed instrument, for providing a magnetic field for the metal string 5 of the stringed instrument;

[0052] The sound pickup module 2, the input end of the sound pickup module 2 is electrically connected to the metal string 5 (referred to as the string), and is used to collect the current signal generated by the metal string 5 cutting the magnetic field and output an audio signal.

[0053] In this embodiment, during the vibration process of the metal string 5, it cuts the magnetic induction lines generated by the string audio oscillator 1, which can cause the metal string 5 to generate a current signal. The current signal of the metal string 5 is introduced into the sound pickup module 2 to realize the collection of the current signal; this method is not affected by the noise of the external environment, that is, various external noises cannot change the oscillation of the instrument string, so naturally various noises are removed, and the undistorted instrument sound is restored. While for a microphone, any noise will cause the coil to vibrate; the pickup in this embodiment realizes the undistorted output of the original sound of the instrument, and at the same time has the advantage of low manufacturing cost.

[0054] In this embodiment, the stringed instrument can be a guitar 6 or an erhu 7, or a pipa, a guzheng, a big ruan, a zhong ruan, etc. The string audio oscillator 1 in this embodiment has different structures according to different types of stringed instruments; taking the guitar 6 and the erhu 7 as examples:

[0055] When the stringed instrument is a guitar 6, as Figures 2-4 shown, the string audio oscillator 1 includes: a mounting plate 101, the mounting plate 101 has a trapezoidal structure, a plurality of magnetic pieces 102 are inlaid on the mounting plate 101, all the magnetic pieces 102 are trapezoidally distributed, the length direction of the magnetic pieces 102 is parallel to the metal string 5, and the metal string 5 of the highest pitch of the guitar 6 is close to the lower bottom edge of the mounting plate 101.

[0056] In this embodiment, the mounting plate 101 is made of a plastic plate, the magnetic pieces 102 are directly inlaid on the plastic plate, the right-angle side of the mounting plate 101 directly abuts against the lower string saddle of the guitar 6, the mounting plate 101 can be adhesively bonded to the panel position of the sound hole and the lower string saddle of the guitar 6, the width of the mounting plate 101 is greater than the total width of all 6 metal strings 5 of the guitar 6, and at the same time, the magnetic poles of all the magnetic pieces 102 on the same plane of the mounting plate 101 are the same, and the total width of all the magnetic pieces 102 in the width direction of the mounting plate 101 is greater than the distance between the two outermost metal strings 5 of the guitar 6, that is to say, the total width of all the magnetic pieces 102 is greater than the total width of all 6 metal strings 5 of the guitar 6, and the intermittent width between each magnetic piece 102 is as small as possible; as a further optimization of this embodiment, a whole magnetic plate with a size similar to the combined width of all the magnetic pieces 102 can also be inlaid on the mounting plate 101.

[0057] In this embodiment, the mounting plate 101 is designed as a trapezoidal structure, and all the magnetic sheets 102 are trapezoidally distributed. At this time, the number of magnets below the string of the guitar 6 gradually increases along the method from bass to treble, which can enhance the electromagnetic signal amount of the treble frequency sound signal to make up for the systematic attenuation of the audio signal amount loss brought by the increase in impedance of the treble string.

[0058] In this embodiment, parallel grooves with set width and length are made on the plastic plate, and then the magnetic sheets 102 with the north pole (N) and south pole (S) on both sides are embedded into the parallel grooves and fixed after applying adhesive liquid according to the principle that the polarities of the magnetic sheets 102 on the same side are the same, thus making a string audio oscillator 1 with the same polarity on one side.

[0059] When the stringed instrument is an erhu 7, as Figures 5-7 shown, the string audio oscillator 1 includes: a jacket 0101, on which a magnetic block 0102 or a magnet sheet group is inlaid. One side of the magnetic block 0102 or the magnet sheet group is a magnetic pole, and one side plane of the magnetic block 0102 or the magnet sheet group is parallel to the metal string of the erhu; a bonding surface 0103 is provided on the clamping surface of the jacket 0101, and a bonding sleeve 0104 for bonding the bonding surface 0103 is provided on the neck 8 of the erhu 7.

[0060] In this embodiment, the jacket 0101 can adopt a U-shaped structure, as Figure 5 shown; it can also adopt a hoop structure, as Figure 7 shown; the U-shaped jacket 0101 is clamped on the neck 8 by elasticity, and the hoop-structured jacket 0101 can be fixed on the neck 8 by bolts. The magnetic sheet 102 of this embodiment is preferably fixed parallel to the inner wall surface of the soundboard of the erhu 7 with the south pole (S) close to the string, parallel to the inner and outer strings of the erhu 7, but at one end close to the soundboard covering of the erhu 7, incorrect installation with two magnetic poles at the same time is not allowed.

[0061] As a further optimization of this embodiment, as Figure 1 shown, the pickup module includes: a lead wire 201, a pickup signal input jack 202, an electrolytic capacitor 203, a battery power supply 205, a power switch 206, and a signal output connector 207;

[0062] The lead wire 201 is used to connect the metal string 5 to the pickup signal input jack 202. The first end of the pickup signal input jack 202 is electrically connected to the positive electrode of the electrolytic capacitor 203. The negative electrode of the electrolytic capacitor 203 is electrically connected to the first end of the power switch 206. The second end of the power switch 206 is electrically connected to the negative electrode of the battery power supply 205. The positive electrode of the battery power supply 205 and the second end of the pickup signal input jack 202 are both electrically connected to the signal output connector 207.

[0063] In this embodiment, the current signal generated by the vibration of the string enters the pickup module 2. The series connection of large-capacity electrolytic capacitors 203 cancels the attenuation of the audio signal by the strings of the stringed instrument, and can reduce the audio signal loss and distortion caused by the AC inductive reactance of the inductor; since the string audio oscillator is not affected by various noises in the external environment, the sound of the instrument under the condition of no distortion can be obtained, and the unique harmonic quality of the stringed instrument that was originally difficult to capture can also be obtained.

[0064] The battery power supply 205 in this embodiment can use a rechargeable 4.5-volt battery pack. At the same time, a power input interface is connected to the battery pack, which can not only directly supply power to the circuit, but also charge the rechargeable battery of the battery pack. That is, the battery power supply 205 can be charged using a charger. The power switch 206 is used to activate the pickup module 2.

[0065] In this embodiment, the connection relationship between the lead wire 201, the metal string 5 and the pickup signal input jack 202 is as follows:

[0066] When the stringed instrument is a guitar 6, the first string of the guitar 6 from the string at the lower bridge saddle is set as the head of the metal string 5, and it is connected to the string of the tuning peg of the second string from below through the upper bridge saddle to the tuning peg. Then, it is connected to the string of the guitar 6 under the lower bridge saddle of the second string as the tail of the wire, forming a series-connected structure; and so on, the third metal string 5 is connected in series with the fourth, and the fifth metal string 5 is connected in series with the sixth; then the metal strings 5①, ③, ⑤ are connected in parallel with each other, and the metal strings 5②, ④, ⑥ are connected in parallel with each other. In this way, three groups of series-connected wires ①, ②, ③, ④, ⑤, ⑥ are formed. The connection of ①, ③, ⑤ in parallel makes the head of the lead wire 201 connected to the guitar 6 strings, and the connection of ②, ④, ⑥ in parallel makes the tail of the lead wire connected to the guitar 6 strings, serving as the two wire output terminals of the audio signal. The output terminals are inserted into the pickup signal input jack 202 through a wire-connected plug.

[0067] On the board surface from the lower part of the sound hole to the bridge, a string audio oscillator 1 is installed in parallel. When any one of the metal strings vibrates, the string in the uniform magnetic field of the string audio oscillator 1 generates an undistorted audio current signal. The generation of the audio signal is based on the principle of electromagnetic induction. According to the right-hand rule, assuming that the string audio oscillator 1 under the string faces the string as the south pole, put the right hand under the string with the palm up, the thumb points outwards in the direction of the string vibration, and the four fingers are perpendicular to the thumb direction. The audio-induced current then flows upward along the four fingers, and the current flows in from the head end of the series-connected string and out from the tail end of the series-connected string; if the metal string 5 rebounds inward and vibrates, then the four fingers and the thumb rotate 180°, and the thumb points in the direction of the string rebound. At this time, the audio-induced current flows in from the tail end of the series-connected string and out from the head end of the series-connected string.

[0068] When the string instrument is the erhu 7, the strings of the erhu 7 are connected in series or parallel with wires, and two output wires are led out as the lead wire 201, and a plug is welded on the lead wire 201. The plug can be inserted into the pickup signal input jack 202.

[0069] In this embodiment, according to the structure and design principle, on this basis, an installation suitable for the instrument structure can be selected, and corresponding structural improvements with minor differences can be made. For example, for pipa, guzheng, da ruan, zhong ruan, etc., on the basis of the guitar 6, some structural adjustments can be made appropriately; as mentioned above, on the basis of the above series and parallel connection methods, for the string group of the instrument with a shorter total length, the series connection method can be adopted, and the strings of the string instrument are connected end to end in series; for the strings with a longer total length, the parallel connection method can be adopted, that is, the heads of each string are connected in parallel, the tails are connected in parallel, and then the heads and tails are respectively led out through wires and connected to the plugs and inserted into the circuit to form a closed wire; the vibration of any one of the wires is a free movement in three-dimensional space perpendicular to the string in different directions, continuously cutting the magnetic force lines in the uniform magnetic field, thereby generating a current signal.

[0070] The utility model can cover the actual applications of all string instruments and has greater potential for popularization.

[0071] Through the innovative design of installing the string audio oscillator 1, the external environment of the utility model will not cause any interference to the audio oscillation signal, and the original sound quality of the instrument is realized without distortion from the structural principle; through subsequent signal amplification, the problem that the volume of bowed string instruments is generally small and it is difficult to undertake independent performance or accompaniment is solved; and the problem of anti-interference that cannot be overcome by microphone signal amplification is solved.

[0072] Embodiment 2

[0073] Figure 12The following is a structural block diagram of a sound pickup system for a stringed instrument provided by an embodiment of the present utility model. As Figure 12 shown, this embodiment provides a sound pickup system for a stringed instrument. The system includes: a sound pickup of the stringed instrument in Embodiment 1, a sounder 4, and an adjustable audio amplifier 0;

[0074] The input end of the adjustable audio amplifier is electrically connected to the output end of the sound pickup module 2 of the sound pickup, and is used to amplify the audio signal output by the sound pickup module 2 and adjust the amplification factor of the audio signal, and output the amplified audio signal;

[0075] The sounder 4 is provided with an audio wire connection hole 404. The audio wire connection hole 404 is electrically connected to an audio wire. The input end of the audio wire is electrically connected to the output end of the adjustable audio amplifier 0. The sounder 4 is used to play the amplified audio signal output by the adjustable audio amplifier 0

[0076] In this embodiment, as Figure 13 shown, the system further includes: a transmitting unit. The input end of the transmitting unit is electrically connected to the output end of the sound pickup module 2, and the signal transmitting end of the transmitting unit is electrically connected to the signal receiving end of the sounder;

[0077] The transmitting unit includes: a frequency modulation transmitter 17, a Bluetooth transmitter 303, and a high-frequency transmitter 304.

[0078] In this embodiment, the transmitting unit further includes: a backup transmitter 301, which can be one or a combination of the above-mentioned frequency modulation transmitter 17, Bluetooth transmitter 303, and high-frequency transmitter 304, or other transmitters; similarly, the sounder 4 is provided with a backup receiving switch 405, and the backup receiving switch 405 is used to receive the signal output by the backup transmitter 301.

[0079] As a further optimization of this embodiment, as Figure 8 shown, the system further includes: a packaging box 10. The packaging box 10 is used to package the adjustable audio amplifier 0, the sound pickup module 2 of the sound pickup, and the frequency modulation transmitter 17; the packaging box 10 is provided with a sound pickup signal input jack 202 of the sound pickup module 2 and a signal output jack 18 of the adjustable audio amplifier 0. The signal output connector 207 of the sound pickup module 2 is electrically connected to the audio input jack 19 of the adjustable audio amplifier 0; the frequency modulation transmitter 17 is installed on the window of the packaging box, next to the outer shell of the adjustable audio amplifier 0, and the input end of the frequency modulation transmitter 17 is electrically connected to the signal output jack 18 of the adjustable audio amplifier 0;

[0080] The encapsulation box 10 is also provided with: a DC external input jack 16, a power switch 206 of the pickup module 2, a knob 15 of the adjustable audio amplifier 0, and a frequency modulation button display screen 14;

[0081] The DC external input jack 16 is electrically connected to the battery power supply 205 of the pickup module 2. The DC external input jack 16 serves as a charging interface for externally connecting devices such as chargers to charge the power battery 205; the knob 15 is used to manually adjust the amplification factor of the adjustable audio amplifier 0 for audio signals.

[0082] In this embodiment, the encapsulation box 10 is provided with a frequency modulation button display screen 14, a knob 15, a power switch 206, a DC external input jack 16, two signal output jacks 18, and a pickup signal input jack 202.

[0083] Among them, turning the knob 15 can adjust the amplification factor of the adjustable audio amplifier 0, and flexibly adjust the amplification factor of the audio signal according to requirements to obtain different output amounts of the audio signal, so that the weak audio signal of the string oscillation audio pickup can pass through audio signal adjustment to obtain the musical instrument sound under the condition of no distortion; two signal output jacks 18 are installed in parallel at the audio signal output end, which can transmit audio signals to two speakers at the same time; directly insert the audio connection wire or alternately plug in different transmission methods into the two speakers to achieve the transmission of the non-distorted audio amplification adjustment signal.

[0084] In this embodiment, the power switch 206 is used to start or turn off the adjustable audio amplifier 0 and the pickup module 2. The two signal output jacks 18 are connected in parallel and serve as the output end of the adjustable audio amplifier 0, which can output the amplified audio signal at the same time; the signal output jack 18 can be connected to an audio wire with a plug, and the audio wire with a plug is directly connected to the speaker 4. The amplified audio signal output by the adjustable audio amplifier 0 can be directly transmitted to the speaker;

[0085] In this embodiment, through the two signal output jacks 18 on the encapsulation box 10, the Bluetooth transmitter 303 and the high-frequency transmitter 304 of the transmitting unit can be connected through wires, while the frequency modulation transmitter 17 is directly installed on the adjustable audio amplifier 0 and integrated in the encapsulation box 10; the transmitting unit is used for various functions such as frequency modulation output and conversion of the audio signal output by the pickup module 2.

[0086] Or the signal output jack on the encapsulation box 10 is directly connected to an audio wire with a plug, and the audio wire with a plug is used to connect the speaker 4 to achieve the transmission of the non-distorted audio signal; the signal output jacks 18 are set to be connected in parallel so that two speakers 4 can receive the audio signal at the same time when in use.

[0087] In this embodiment, the sounder 4 is further provided with: a frequency modulation signal receiving switch 401, a Bluetooth signal receiving switch 402, a high-frequency signal receiving socket 403, and an audio wire connection hole 404.

[0088] The communication methods between the sounder 4 of this embodiment and the adjustable audio amplifier 0 include:

[0089] ① The audio signal passes through an audio wire with a plug and is inserted into the corresponding and matching audio wire connection hole 404 of the sounder 4 (depending on the design of different sounders 4), and is directly connected and transmitted to the sounder 4 to obtain an amplified audio signal;

[0090] ② The high-frequency transmitter 304 converts the audio signal of the stringed instrument into a high-frequency signal. The high-frequency signal receiving socket 403 of the sounder 4 inserts a high-frequency signal receiver to convert the high-frequency signal into the audio signal of the stringed instrument;

[0091] ③ The Bluetooth transmitter 303 converts the audio signal of the stringed instrument into a Bluetooth signal. The Bluetooth receiving switch 402 of the sounder 4 is turned on and converted into an audio signal through a Bluetooth receiver;

[0092] ④ The frequency modulation transmitter 17 converts the audio signal of the stringed instrument into a frequency modulation signal. The frequency modulation receiving switch 401 of the sounder 4 is turned on, and the frequency modulation signal is received through frequency modulation search to obtain the audio signal of the stringed instrument;

[0093] ⑤ Through the other signal conversion sound receiving switch (spare receiving switch 405) corresponding to the sounder 4, the audio signal is obtained from the preset other signal receiving methods;

[0094] Thus, the sounder 4 restores the original sound of the bowed or plucked stringed instrument, amplifies it without distortion, and obtains a more abundant harmonic reverberation effect than the original sound of the instrument.

[0095] In this embodiment, for the guitar 6, it is necessary to form an integral structure with the encapsulation box 10 and install it on the rear panel of the guitar 6 close to the bridge. The position of the encapsulation box 10 is fixed by an adhesive method. For convenient observation, the frequency modulation transmitter panel is changed to be installed on the upper panel suitable for channel adjustment; if aesthetics is considered, the encapsulation box 10 can also be installed in a relatively concealed position.

[0096] For the erhu 7, as Figure 9 shown, the encapsulation box 10 is provided with a connection component, and the encapsulation box 10 is installed on the support plate 9 of the erhu 7 through the connection component.

[0097] As a further optimization of this embodiment, as Figure 10 and Figure 11As shown in the figure, the connection component includes: a collapsible U-shaped plate 11. The outer wall of the middle plate of the U-shaped plate 11 is adhesively connected to the packaging box 10. Magnetic snap fasteners 12 are inlaid on the two side plates of the U-shaped plate 11. Strip-shaped iron sheets 13 are inlaid on the outer walls of both sides of the support plate 9 along the length direction. The strip-shaped iron sheets 13 and the magnetic snap fasteners 12 on the side plates form a magnetic attraction fit.

[0098] In this embodiment, on the protruding parts on both sides of the support plate 9 at the bottom of the fiddle barrel, a shallow concave strip groove with a width ≤ 0.01 m and a depth < 0.002 m is dug. Glue is applied to the shallow concave strip groove, and an iron sheet of the same length and width is pasted on it. There are the following two assembly methods:

[0099] Method 1: Make a concave plate with a length and width slightly larger than the support plate 9 at the bottom of the fiddle barrel. The depth of the groove opening should completely cover the support plate 9. The groove opening faces upward. At appropriate positions on the inner side plates of both sides of the groove, corresponding to the grooves of the support plate 9, several magnet sheets are installed and pasted on each side. Then it is pasted with the upper panel of the packaging box 10. The support plate 9 on both sides at the bottom of the fiddle barrel is installed with the packaging box 10. The packaging box 10 can be very conveniently fixed to the bottom of the erhu 7 and can be removed at any time when not needed.

[0100] Method 2: Select a relatively thick flexible material such as curtain cloth or leather. After intermittently bonding magnet sheets on both sides and fixing the seal firmly, two rows of magnetic snap fasteners 12 are formed on the two inner sides. Then the connecting belt of the flexible material in the middle is adhesively bonded to the panel of the packaging box 10 with glue. The magnetic snap fasteners 12 on both sides are placed on the outer edge of the upper panel of the packaging box 10 for picking up. The bottom of the fiddle barrel support plate 9 of the erhu 7 is placed on the packaging box 10 equipped with a foldable magnetic adhesive buckle. Just flip it upward by hand to fix the packaging box 10 on the support plate 9 at the bottom of the fiddle barrel of the erhu 7. When the output line plug of the string audio oscillator 1 of the erhu 7 is inserted into the pickup signal input jack 202 of the packaging box 10 and the power switch 206 is turned on, it can enter the working state.

[0101] In this utility model, by installing a string audio oscillator 1 on a stringed instrument, during the vibration process, the metal string 5 cuts the magnetic induction lines generated by the string audio oscillator 1, enabling the metal string 5 to generate a current signal. The weak current signal generated by the metal string 5 enters the pickup module 2 and outputs an audio signal through the signal output connector 207, entering the input end of the adjustable audio amplifier. Then, it is amplified by the adjustable audio amplifier 0. At the same time, the amplification factor of the adjustable audio amplifier for the audio signal can be adjusted using the knob 15. The amplified audio signal can be transmitted to the sounder 4 through transmitters such as audio wires, FM transmitters 17, Bluetooth transmitters 303, and high-frequency transmitters 304, and the sounder 4 plays the audio signal. By using the method of picking up the audio signal of a stringed instrument with a pickup, it is not affected by the noise interference of the external environment. The pickup module and the adjustable audio amplifier can achieve the original sound of the instrument without distortion. After amplifying the signal, pleasant instrument overtones can also be heard, and the entire pickup system has the advantage of low manufacturing cost and wide applicability to stringed instruments.

[0102] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A pickup for a stringed instrument, characterized in that, The pickup includes: A string audio oscillator (1), installed on a stringed instrument, for providing a magnetic field for the metal strings (5) of the stringed instrument; A pickup module (2), the input end of the pickup module (2) is electrically connected to the metal string (5), for collecting the current signal generated by the metal string (5) cutting the magnetic field and outputting an audio signal.

2. The pickup of the stringed instrument according to claim 1, characterized in that, The stringed instrument is a guitar (6), and the string audio oscillator (1) includes: a mounting plate (101), the mounting plate (101) has a trapezoidal structure, several magnetic pieces (102) are inlaid on the mounting plate (101), all the magnetic pieces (102) are trapezoidally distributed, the length direction of the magnetic pieces (102) is parallel to the metal string (5), and the metal string (5) of the highest pitch of the guitar (6) is close to the lower bottom edge of the mounting plate (101).

3. The pickup of the stringed instrument according to claim 2, wherein, All the magnetic pieces (102) have the same magnetic poles on the same plane of the mounting plate (101), and the total width of all the magnetic pieces (102) in the width direction of the mounting plate (101) is greater than the distance between the two outermost metal strings (5) of the guitar (6).

4. The pickup of the stringed instrument according to claim 1, characterized in that, The stringed instrument is an erhu (7), and the string audio oscillator (1) includes: a jacket (0101), a magnetic block (0102) or a magnet sheet group is inlaid on the jacket (0101), one side of the magnetic block (0102) or the magnet sheet group is a magnetic pole, and one side plane of the magnetic block (0102) or the magnet sheet group is parallel to the metal string (5) of the erhu; a bonding surface (0103) is provided on the clamping surface of the jacket (0101), and a bonding sleeve (0104) for bonding the bonding surface (0103) is provided on the neck (8) of the erhu (7).

5. The pickup of the stringed instrument according to claim 1, characterized in that, The pickup module (2) includes: a lead wire (201), a pickup signal input jack (202), an electrolytic capacitor (203), a battery power supply (205), a power switch (206) and a signal output connector (207); The lead wire (201) is used to connect the metal string (5) to the pickup signal input jack (202), the first end of the pickup signal input jack (202) is electrically connected to the positive electrode of the electrolytic capacitor (203), the negative electrode of the electrolytic capacitor (203) is electrically connected to the first end of the power switch (206), the second end of the power switch (206) is electrically connected to the negative electrode of the battery power supply (205), and the positive electrode of the battery power supply (205) and the second end of the pickup signal input jack (202) are both electrically connected to the signal output connector (207).

6. A sound pickup system for a stringed instrument, characterized in that, The system includes: The pickup of the stringed instrument according to any one of claims 1-5; An adjustable audio amplifier (0), the input end of the adjustable audio amplifier (0) is electrically connected to the output end of the pickup module (2) of the pickup, for amplifying the audio signal output by the pickup module (2) and adjusting the amplification factor of the audio signal, and outputting the amplified audio signal; A sounder (4), an audio wire connection hole (404) is provided on the sounder (4), the audio wire connection hole (404) is electrically connected to an audio wire, the input end of the audio wire is electrically connected to the output end of an adjustable audio amplifier (0), and the sounder (4) is used to play the amplified audio signal output by the adjustable audio amplifier (0).

7. The sound pickup system of the stringed musical instrument according to claim 6, characterized in that, The system further includes: a transmitting unit, the input end of the transmitting unit is electrically connected to the output end of the adjustable audio amplifier (0), and the signal transmitting end of the transmitting unit is electrically connected to the signal receiving end of the sounder; The transmitting unit includes: a frequency modulation transmitter (17), a Bluetooth transmitter (303) and a high-frequency transmitter (304).

8. The sound pickup system of the stringed instrument according to claim 7, characterized in that, The system further includes: a packaging box (10), the packaging box (10) is used to package the adjustable audio amplifier (0), the pickup module (2) of the pickup and the frequency modulation transmitter (17); a pickup signal input jack (202) of the pickup module (2) and a signal output jack (18) of the adjustable audio amplifier (0) are provided on the packaging box (10), and the signal output connector (207) of the pickup module (2) is electrically connected to the audio input jack (19) of the adjustable audio amplifier (0); the frequency modulation transmitter (17) is installed on the window of the packaging box (10), close to the adjustable audio amplifier (0), and the input end of the frequency modulation transmitter (17) is electrically connected to the signal output jack (18) of the adjustable audio amplifier (0); The following are also provided on the packaging box (10): a DC external input socket (16), a power switch (206) of the pickup module (2), a knob (15) of the adjustable audio amplifier (0) and a frequency modulation button display screen (14); The DC external input socket (16) is electrically connected to the battery power supply (205) of the pickup module (2), and the knob (15) is used to manually adjust the amplification factor of the adjustable audio amplifier (0) for the audio signal.

9. The pickup system of the stringed musical instrument according to claim 8, characterized in that, When the stringed instrument is a guitar (6), the packaging box (10) is adhered to the rear panel of the bridge of the guitar (6); when the stringed instrument is an erhu (7), a connection component is provided on the packaging box (10), and the packaging box (10) is installed on the support plate (9) of the erhu (7) through the connection component.

10. The sound pickup system of the stringed instrument according to claim 9, characterized in that, The connection component includes: a foldable U-shaped plate (11), the outer wall of the middle plate of the U-shaped plate (11) is adhesively connected to the packaging box (10), magnetic snap fasteners (12) are inlaid on the two side plates of the U-shaped plate (11), strip-shaped iron sheets (13) are inlaid on the outer walls of both sides of the support plate (9) along the length direction, and the strip-shaped iron sheets (13) and the magnetic snap fasteners (12) on the side plates form a magnetic attraction fit.

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