Electro-acoustic sensor of guitar and guitar

Abstract

The utility model relates to the technical field of guitars, in particular to an electroacoustic sensor of a guitar and the guitar, which comprises an upper shell and a lower shell which are fixed together, the lower shell is provided with piezoelectric ceramics, a PCB (printed circuit board) is arranged above the piezoelectric ceramics, and the front surface and the back surface of the PCB are respectively and electrically connected with an anode connecting wire and a cathode connecting wire. The two ends of the piezoelectric ceramic are provided with electrodes, the upper shell and the lower shell are both made of aluminum materials, one electrode of the piezoelectric ceramic makes contact with the lower shell, and the other electrode of the piezoelectric ceramic makes contact with a copper foil on the back face of the PCB. The piezoelectric ceramics in the device can convert mechanical vibration into electric signals, the signal level is improved, and the sensor can accurately capture tiny vibration of the guitar due to the quick response characteristic of the piezoelectric ceramics, so that clear and real tone reduction is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of guitars, in particular to an electro-acoustic sensor for guitars and a guitar. Background Art

[0002] There are several types of electro-acoustic sensors for guitars, usually microphone-type sensors and piezoelectric sensors. The microphone sensor is more faithful to the original sound, but its limitation is that it is easy to cause a feedback loop between the microphone and the speaker, resulting in howling.

[0003] Traditional piezoelectric sensors include: piezoelectric rod sensors under the saddle and piezoelectric ceramic sheet sensors; the piezoelectric rod sensors under the saddle are installed under the lower string saddle of the musical instrument, and the pressure of the vibrating strings is converted into an electrical signal. The characteristic is that the sound output by the electro-acoustic system is distorted from the original sound timbre of the instrument heard on-site; the piezoelectric ceramic sheet sensor is a sensor pasted on the soundboard of the instrument. It does not receive the direct pressure of the strings, but the soundboard of the instrument vibrates, and the piezoelectric ceramic sheet deforms to generate a piezoelectric signal. The characteristic is that the sound is relatively more faithful to the original sound compared with the piezoelectric rod sensor under the saddle, but the signal level is weak. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides an electro-acoustic sensor for guitars and a guitar.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: an electro-acoustic sensor for guitars, including an upper housing and a lower housing fixed together. The lower housing is provided with a piezoelectric ceramic, and a PCB board is arranged above the piezoelectric ceramic. A positive connection wire and a negative connection wire are electrically connected to the front and back of the PCB board respectively. Both ends of the piezoelectric ceramic are provided with electrodes. The upper housing and the lower housing are both made of aluminum. One electrode of the piezoelectric ceramic contacts the lower housing, and the other electrode contacts the copper foil on the back of the PCB board.

[0008] Furthermore, the utility model is improved by including a T-shaped bolt for fixing the upper housing and the lower housing. The head of the T-shaped bolt abuts against the upper housing, and the threaded part of the T-shaped bolt is threadedly connected to the lower housing.

[0009] Furthermore, the utility model is improved by separating the upper housing from the lower housing.

[0010] Furthermore, the utility model is improved by providing a through hole on the PCB board for the T-shaped bolt to pass through.

[0011] Furthermore, the utility model is improved by fixing the positive connection wire and the negative connection wire to the PCB board through rivets.

[0012] Further, the present utility model is improved in that the piezoelectric ceramic is cylindrical and the number of piezoelectric ceramics is three.

[0013] Further, the present utility model is improved in that a placement groove for inserting the bottom end of the piezoelectric ceramic is provided on the upper surface of the lower housing.

[0014] A guitar of the present utility model includes a guitar body, and an electro-acoustic sensor of the above-mentioned guitar is provided on the guitar body.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides an electro-acoustic sensor and a guitar of a guitar, having the following beneficial effects: The piezoelectric ceramic in the device can convert mechanical vibration into an electrical signal, improving the signal level. Its fast response characteristic enables the sensor to accurately capture the minute vibrations of the guitar, thereby providing clear and true tone reproduction. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the electro-acoustic sensor of the present utility model;

[0018] Figure 2 is a schematic structural diagram of a PCB board, a copper foil, a rivet, a positive connection wire, and a negative connection wire;

[0019] Figure 3 is Figure 1 a sectional view of

[0020] Figure 4 is Figure 1 an exploded view of

[0021] Figure 5 is a schematic structural diagram when the electro-acoustic sensor is installed on the guitar;

[0022] Reference numerals in the drawings: 1. Upper housing; 2. Lower housing; 3. Piezoelectric ceramic; 4. PCB board; 5. Positive connection wire; 6. Negative connection wire; 7. Copper foil; 8. T-shaped bolt; 9. Rivet; 10. Guitar body. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer toFigures 1 - 5 , the utility model relates to an electro-acoustic sensor for a guitar, which comprises an upper housing 1 and a lower housing 2 fixed together. The lower housing 2 is provided with a piezoelectric ceramic 3. More specifically, the piezoelectric ceramic 3 is cylindrical, and the number of the piezoelectric ceramics 3 is three. A placement groove for the bottom end of the piezoelectric ceramic 3 to be inserted is formed on the upper surface of the lower housing 2. Above the piezoelectric ceramic 3, there is a PCB board 4. The front and back of the PCB board 4 are electrically connected with a positive connection wire 5 and a negative connection wire 6 respectively. Both ends of the piezoelectric ceramic 3 are provided with electrodes. More specifically, the piezoelectric ceramic 3 is polarized by applying high voltage at both ends of the columnar shape, and through the electrode coating process, metal silver is coated on both ends as electrodes. Both the upper housing 1 and the lower housing 2 are made of aluminum. One electrode of the piezoelectric ceramic 3 is in contact with the lower housing 2, and the other electrode is in contact with the copper foil 7 on the back of the PCB board 4.

[0025] Furthermore, the utility model is improved in that it further comprises a T-shaped bolt 8 for fixing the upper housing 1 and the lower housing 2. The T-shaped bolt 8 is made of metal. The head of the T-shaped bolt 8 abuts against the upper housing 1, and the threaded part of the T-shaped bolt 8 is threadedly connected with the lower housing 2.

[0026] Furthermore, the utility model is improved in that the upper housing 1 is separated from the lower housing 2.

[0027] Furthermore, the utility model is improved in that the PCB board 4 is provided with a through hole for the T-shaped bolt 8 to pass through.

[0028] Furthermore, the utility model is improved in that both the positive connection wire 5 and the negative connection wire 6 are fixed on the PCB board 4 through rivet buttons 9.

[0029] In this embodiment, during installation, the three cylindrical piezoelectric ceramics 3 are placed with their positive poles facing up in the placement groove of the lower housing 2. The PCB board 4 connected with the positive connection wire 5 and the negative connection wire 6 is placed on the upper surface of the cylindrical piezoelectric ceramic 3. The upper housing 1 covers the PCB board 4. The T-shaped bolt 8 passes through the upper housing 1 and the through hole and then is locked with the lower housing 2 to form a complete structure. And the upper housing 1 is separated from the lower housing 2. The upper housing 1 and the lower housing 2 tightly hold the piezoelectric ceramic 3. The design of the number of the three piezoelectric ceramics 3 also provides stability for this device and will not generate voids due to size problems.

[0030] For a guitar of the utility model, please refer to Figure 5 , which comprises a guitar body 10. An electro-acoustic sensor for a guitar is provided on the guitar body 10. The positive connection wire 5 and the negative connection wire 6 are connected to the output jack on the guitar body 10.

[0031] In this embodiment, the electroacoustic sensor of the present utility model is installed on the guitar body 10, and the working principle is as follows: The lower housing 2 of the electroacoustic inductor is adhered to the soundboard by rigid epoxy AB glue. When the soundboard vibrates, the vibration is conducted to the piezoelectric ceramic 3 through the lower housing 2. Due to the piezoelectric effect, the piezoelectric ceramic 3 generates an alternating current signal. The upper surface (positive electrode) of the piezoelectric ceramic 3 is in direct contact with the copper foil 7 on the lower surface of the PCB board 4, and the negative connection wire 6 serves as the negative output. The lower surface (negative electrode) of the piezoelectric ceramic 3 is in direct contact with the lower housing 2 and is connected to the upper housing 1 via the T-shaped bolt 8. The upper housing 1 is in direct contact with the copper foil 7 on the upper surface of the PCB board 4, and the positive connection wire 5 serves as the positive output. The piezoelectric ceramic 3 in this device can convert mechanical vibration into an electrical signal, improving the signal level. Its fast response characteristic enables the sensor to accurately capture the minute vibrations of the guitar, thereby providing clear and true tone reproduction.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An electroacoustic sensor for a guitar, characterized in that: The invention comprises an upper shell (1) and a lower shell (2) fixed together, wherein the lower shell (2) is provided with a piezoelectric ceramic (3), a PCB board (4) is provided above the piezoelectric ceramic (3), a positive electrode connecting wire (5) and a negative electrode connecting wire (6) are respectively electrically connected to the front and back sides of the PCB board (4), both ends of the piezoelectric ceramic (3) are provided with electrodes, the upper shell (1) and the lower shell (2) are both made of aluminum, one electrode of the piezoelectric ceramic (3) is in contact with the lower shell (2), and the other electrode is in contact with a copper foil (7) on the back side of the PCB board (4).

2. The electroacoustic sensor for guitar according to claim 1, characterized in that: It also includes a T-bolt (8) for fixing the upper shell (1) and the lower shell (2), wherein the head of the T-bolt (8) abuts against the upper shell (1), and the threaded portion of the T-bolt (8) is threadedly connected to the lower shell (2).

3. The electroacoustic sensor for guitar according to claim 2, characterized in that: The upper shell (1) is separated from the lower shell (2).

4. The electroacoustic sensor for guitar according to claim 3, characterized in that: The PCB board (4) is provided with a through hole for the T-shaped bolt (8) to pass through.

5. The electroacoustic sensor for guitar according to claim 1, characterized in that: The positive electrode connecting wire (5) and the negative electrode connecting wire (6) are both fixed on the PCB board (4) via rivets (9).

6. The electroacoustic sensor for guitar according to claim 1, characterized in that: The piezoelectric ceramics (3) are cylindrical, and the number of piezoelectric ceramics (3) is three.

7. The electroacoustic sensor for guitar according to claim 6, characterized in that: The upper surface of the lower shell (2) is provided with a placement groove for inserting the bottom end of the piezoelectric ceramic (3).

8. A guitar, comprising a guitar body (10), characterized in that: The guitar body (10) is provided with an electroacoustic sensor for a guitar as claimed in any one of claims 1 to 7.

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