JPH0573061A - Pickup for electric musical instrument - Google Patents

Abstract

PURPOSE:To realize the pickup for the electric musical instrument whose timbre can finely be adjusted. CONSTITUTION:A detection coil 2 for leading an electric signal out is wound around a permanent magnet 1 which is arranged opposite a sound generating body and a power source 5 for excitation which feeds an exciting current to the detection coil 2 is provided as a means which generates magnetic flux for correcting the magnetic flux of the permanent magnet 1. For another configuration, a yoke 8 made of a ferromagnetic body is provided in a movable and deformable state nearby the permanent magnet 1 so as to adjust magnetic flux passing through the sound generating body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric musical instrument pickup for extracting vibration of a sounding body in an electric musical instrument as an electric signal.

[0002]

2. Description of the Related Art In an electric musical instrument such as an electric guitar, an electromagnetic pickup is used to extract the vibration of a sounding body as an electric signal. The structure, material, mounting structure for the electric musical instrument body, and the like of the pickup greatly influence the timbre of the electric musical instrument. Therefore, usually, an electromagnetic pickup having a predetermined structure suitable for obtaining a desired timbre is attached to an electric musical instrument according to optimal assembly conditions. A pickup for an electric musical instrument of this type is disclosed in Japanese Utility Model Laid-Open No. 64-3899.

[0003]

By the way, in the above-mentioned conventional pickup for electric musical instrument, the relationship between various manufacturing parameters relating to the structure, the material, the mounting structure to the main body of the electric musical instrument and the timbre of the electric musical instrument is extremely delicate. Therefore, there is a problem in that it is extremely difficult to obtain a desired timbre while allowing variations in these various manufacturing parameters. Further, it is impossible to adjust the tone color after the pickup is attached to the electric musical instrument and further during the performance. In addition, there was an electric musical instrument that filtered the electric signal obtained from the pickup instead of changing the conversion characteristic of the pickup, but in this case, only a rough tone change such as high frequency removal or low frequency removal was performed. It was not possible to make fine adjustments to obtain a desired tone color.

The present invention has been made in view of the above circumstances, and provides a pickup for an electric musical instrument, which allows fine adjustment of the timbre and which can adjust the timbre even after being incorporated in an electric musical instrument. The purpose is to do.

[0005]

According to a first aspect of the present invention, there is provided an electric musical instrument pickup comprising: a magnetic core closely facing the sounding body; and a coil wound around the magnetic core. In a pickup for an electric musical instrument that converts vibration into an electric signal and outputs the electric signal from the coil, an exciting means for supplying an exciting current to the coil is provided.

An electric musical instrument pickup according to a second aspect of the present invention includes a magnetic core closely facing the sounding body and a coil wound around the magnetic core, and converts the vibration of the sounding body into an electric signal. In an electric musical instrument pickup for outputting from the coil, an auxiliary coil wound separately from the coil and an auxiliary exciting means for supplying an exciting current to the auxiliary coil are provided. ..

An electric musical instrument pickup according to a third aspect of the present invention includes a magnetic core that closely faces the sounding body and a coil wound around the magnetic core, and converts the vibration of the sounding body into an electric signal. In the electric musical instrument pickup for outputting from the coil, a magnetic flux guide member made of a ferromagnetic material is provided in the vicinity of the magnetic core.

An electric musical instrument pickup according to a fourth aspect of the present invention includes a magnetic core that closely faces the sounding body and a coil wound around the magnetic core, and converts the vibration of the sounding body into an electric signal. In the pickup for an electric musical instrument that outputs from the coil, a magnetic flux guide member made of a ferromagnetic material that is movably disposed near the magnetic core, and a displacement mechanism that displaces the magnetic flux guide member with respect to the magnetic core. And are provided.

An electric musical instrument pickup according to a fifth aspect of the present invention comprises a magnetic core closely facing the sounding body and a coil wound around the magnetic core, and converts the vibration of the sounding body into an electric signal. In an electric musical instrument pickup that outputs from the coil, a magnetic flux generating member movably arranged near the magnetic core and a displacement mechanism that displaces the magnetic flux generating member with respect to the magnetic core are provided. It is characterized by

[0010]

According to the invention of claim 1, in addition to the magnetic field induced in the coil (magnetic core) by the built-in permanent magnet, the stationary magnetic field generated by the excitation current flowing through the coil is Act on. Therefore, by changing the steady magnetic field due to the exciting current, the vibration of the sounding body,
And the conversion operation to the electric signal is affected, and the timbre of the electric musical instrument changes.

According to the second aspect of the invention, in addition to the magnetic field induced in the coil (magnetic core) by the built-in permanent magnet, the stationary magnetic field generated by the excitation current flowing through the auxiliary coil is generated. Acts on the body. Therefore, by changing the steady magnetic field due to the exciting current, the vibration of the sounding body and its conversion operation into an electric signal are affected, and the timbre of the electric musical instrument changes.

According to the inventions of claims 3 to 4,
The magnetic flux generated from the magnetic core is divided into a magnetic path including a sounding body, a magnetic path including a magnetic flux guiding member, and a magnetic path passing through a space without passing any path thereof. Therefore, by changing the mounting mode of the magnetic flux induction member, the magnetic field emitted from the magnetic core and acting on the sounding body is changed, and the vibration of the sounding body and its conversion operation into an electric signal are changed. Changes.

According to the fifth aspect of the invention, the magnetic flux generating member acting on the sounding body is displaced by the displacement mechanism, and the magnetic field based on the magnetic flux generating member changes among the magnetic fields acting on the sounding body. The timbre changes.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a circuit diagram showing the configuration of a pickup for an electric musical instrument according to a first embodiment of the present invention. In this figure, 1 is a rod-shaped permanent magnet, and one magnetic pole (N pole in FIG. 1) is arranged so as to face the string S which is a sounding body. The detection coil 2 is wound around the permanent magnet 1,
The voltage across the detection coil 2 is supplied to an amplifier (not shown) via the high-pass filter 4, amplified by this amplifier, and then supplied to a speaker (not shown). Further, a low pass filter 3 and an excitation power source 5 are inserted in series between both ends of the detection coil 2. Here, the excitation power supply 5 uses a DC power supply or an AC power supply having a frequency lower than the lowest tone of the electric musical instrument to which this pickup is applied. When the type of electric musical instrument is an electric guitar, the low-pass filter 3 has a cutoff frequency fc equal to or higher than the frequency of the excitation power source 5 and lower than 80 Hz. Is a base, one having a cutoff frequency fc of 40 Hz or less is used. The cutoff frequency fc of the high pass filter 4 is set to 80 Hz or less for an electric guitar and 40 Hz or less for a bass. If the impedance of the excitation power source 5 is sufficiently higher than the input impedance of an amplifier (not shown) that is a load, the low pass filter 3 is unnecessary.

According to this structure, an exciting current is supplied to the detecting coil 2 by the exciting power source 5, and the magnetic field generated by this exciting current is generated together with the magnetic field generated by the permanent magnet 1 and the magnetic field generated by the induced current in the detecting coil 2. Acts on the string S.

For simplification of explanation, the string S has a mass m.
And the force Fs due to the tension of the string S on this string S.
And assuming that only the attractive force Fmg (y) by the permanent magnet 1 acts,

[Equation 1] Is established. In the equation of motion of Equation 1, Ks is a spring constant based on the tension of the string S, and y is a distance from the rest position of the string S and the permanent magnet 1. Here, when the attractive force Fmg (y) by the permanent magnet 1 is small and can be ignored, the general solution of the above equation of motion is

[Equation 2] Therefore, the motion of the string S is a simple vibration. However, the suction force F
When mg (y) becomes large, it cannot be ignored. In this case, the distance between the string S and the permanent magnet 1 when the magnetic field is 0 is L, and appropriate constants a and Kmg determined by the magnetized state of the permanent magnet 1 are used.

[Equation 3] And the attraction force Fmg (y) by the permanent magnet 1
Can be represented. Then, the equation of motion of the string S in this case is

[Equation 4] Is rewritten as Thus, the non-linear element depending on the magnetized state of the permanent magnet 1 affects the movement of the string S.

As in this embodiment, for the detection coil 2,
When an exciting current is supplied by the exciting power source 5 and a steady magnetic field is generated, the vibration state of the moving string S changes while being affected by the non-linear element. Therefore, the tone color can be changed by changing the exciting current.

When the excitation power source 5 shown in FIG. 2 is used, the tone color adjustment becomes very easy. The resistors 51 and 52 are connected in parallel between both output terminals of the pickup coil, and the respective poles of the fixed DC power supply 53 are connected to the intermediate portions of these resistors via the contacts 51a and 52a. Here, the contacts 51a and 52a
Are configured to move to mutually opposite sides according to the operation amount of an operator (not shown). With such a configuration, the output voltage of the excitation power supply 5 can be continuously changed from a negative voltage to a positive voltage by operating the operating element.

FIG. 3 is a circuit diagram showing the structure of an electric musical instrument pickup according to a second embodiment of the present invention. In this embodiment, an exciting coil 6 is wound around a permanent magnet 1 together with a detecting coil 2, and an exciting current is supplied to the exciting coil 6 by an exciting power source 5. As the excitation power source 5, a DC power source, a low-frequency AC power source having a frequency lower than the lowest tone of the musical instrument, or a power source having the configuration shown in FIG. 2 can be used. Even in the case of such a configuration, the same effect as that of the first embodiment can be obtained.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, an electromagnet 7 is arranged separately from the detection coil 2 and the permanent magnet 1 in parallel with the magnetic axis of the permanent magnet 1,
An exciting current is supplied to the coil of the electromagnet 7 by the exciting power source 5. As the excitation power source 5, a DC power source, a low-frequency AC power source having a frequency lower than the lowest tone of the musical instrument, or a power source having the configuration shown in FIG. 2 can be used. Further, the electromagnet 7 may be an air core coil. Even in the case of such a configuration, the magnetic field acting on the sounding body is corrected by the electromagnet 7, and the same effect as in the first embodiment can be obtained. FIG. 5 shows a fourth embodiment of the present invention. In this embodiment, the detection coil 2
Is wound around the magnetic core 2a instead of the permanent magnet 1, and the permanent magnet 1 is interposed between the magnetic pole of the magnetic core 2a and the magnetic pole of the electromagnet 7, which is different from the third embodiment. Even in the case of such a configuration, the same effect as that of the third embodiment can be obtained.

FIG. 6 shows a fifth embodiment in which the present invention is applied to a humbucking type (induction cancellation type) pickup. Magnetic cores 2a and 2 arranged to face the string S
The detection coil 2 is wound in series with respect to b. A permanent magnet 1 is inserted between the magnetic poles of the magnetic cores 2a and 2b. Further, the yoke 8 is arranged so as to lie from the vicinity of one magnetic pole of the permanent magnet 1 toward the vicinity of the other magnetic pole.

The structure of the magnetic circuit in this case is shown in FIG.
In this figure, E is the magnetomotive force of the permanent magnet 1, R0 is the reluctance of the permanent magnet 1, Rst is the constant component of the reluctance of the magnetic path passing through the string S, and rst passes through the string S as the string S vibrates. It is the fluctuation of reluctance that occurs in the magnetic path. Rsh is the reluctance of the magnetic path that does not pass through the string S. Yoke 1 is included in this magnetic path. Φ is the total magnetic flux generated by the permanent magnet 1, φst is the string S
, .Phi.sh is the magnetic flux passing through the magnetic path that does not pass through the string S. In this magnetic circuit, the total reluctance R for the magnetomotive force E is

[Equation 5] Becomes Therefore, the total magnetic flux φ generated by the permanent magnet 1 is

[Equation 6] Becomes And the magnetic flux φst passing through the string S is

[Equation 7] Becomes Here, the vibration of the string S is defined as a simple vibration, and the fluctuation amount rst of the reluctance of the magnetic path passing through the string S is

[Equation 8] Then, the formula of Equation 7 is

[Equation 9] Is rewritten as And

[Equation 10]

[Equation 11] Putting it another way, the formula of Equation 9 is

[Equation 12] Is rewritten as Therefore, the electric signal P generated in the detection coil 2 is

[Equation 13] Becomes In the above equation (13), both Fsh and Gsh are functions of Rsh and change depending on the material, structure, arrangement, etc. of the yoke 8. That is, by arranging the yoke 8, the magnetic flux passing through the string S can be changed, and the electric signal generated in the detection coil 2 interlinking with this magnetic flux can be changed. Further, since the yoke 8 is a ferromagnetic material, its magnetic resistance depends on the frequency. Therefore, Yoke 8
The electric signal P can be changed and the timbre can be adjusted by changing the structure, arrangement, and the like. The material of the yoke 8 is a ferromagnetic material such as iron or ferrite.

FIG. 8 shows a sixth embodiment in which the present invention is applied to a single coil type pickup. In the present embodiment, a yoke 8 that guides the magnetic flux of the permanent magnet 1 is arranged on one magnetic pole of the permanent magnet 1 around which the detection coil 2 is wound. Also in this embodiment, the same effect as that of the fifth embodiment can be obtained. FIG. 9 shows a seventh embodiment of the present invention. This embodiment is different from the sixth embodiment in that a rod-shaped yoke 8 is arranged in parallel with the magnetic axis of the permanent magnet 1. Also in this embodiment, the sixth
The same effect as the embodiment can be obtained.

The eighth to thirtieth embodiments described below are
After the pickup is attached to the electric instrument,
The position of the yoke or the permanent magnet can be adjusted. Eighth embodiment (FIG. 10): Yoke 8 has internal thread 9
A mounting member 9 having a is connected, and a female screw 9a is screwed to a bolt 11 rotatably inserted in the electric musical instrument body 10 so that one end faces one magnet of the permanent magnet 1. Is attached to. When the bolt 11 is rotated, the male screw portion of the bolt 11 advances along the female screw 9a, and as a result, the yoke 8 moves in the arrow Y direction. By moving the yoke 8 in this manner, the magnetic flux emitted from the permanent magnet 1 and passing through the sounding body can be changed, and the timbre can be changed.

Ninth embodiment (FIG. 11): Elongated yoke 8
Are arranged such that the side surfaces along the longitudinal direction thereof face the magnetic poles of the permanent magnet 1. The mounting member 9 is connected at the end of the yoke 8 at right angles to the longitudinal direction of the yoke 8.
A bolt 11 having one end rotatably fixed to the electric musical instrument body 10 is screwed to the female screw 9 a of the mounting member 9. According to this configuration, by rotating the bolt 11, the yoke 8 moves in the arrow X direction that crosses the magnetic axis of the permanent magnet 1. Tenth embodiment (FIG. 12): In this embodiment, the yoke 8 in the fifth embodiment is separated into two yokes 8a and 8b, one yoke 8a is fixed to the main body, and the other yoke 8a is fixed to the main body. The yoke 8b is movable. One end of a bolt 11 is rotatably fixed to the yoke 8b, and a male screw portion of the bolt 11 is a female screw 9 of a mounting member 9 connected to the yoke 8a.
It is screwed to a. According to this configuration, by rotating the bolt 11, the yoke 8b moves in the direction of the arrow X parallel to the magnetic axis of the permanent magnet. Eleventh Embodiment (FIG. 13): In this embodiment, a female screw is formed on the yoke 8, a bolt 11 is screwed onto the female screw, and the protruding length of the bolt 11 from the yoke 8 is variable. is there. That is, the bolt 11 is used as a magnetic flux guide member together with the yoke 8, and the shape of the magnetic flux guide member can be changed. Since this embodiment has a simple structure, it can be applied to each permanent magnet of a pickup using a plurality of permanent magnets.

Twelfth embodiment (FIG. 14): In this embodiment, instead of the rod-shaped yoke 8 in the fifth embodiment, a yoke 8c which can be bent at the center is attached. .. About half of the longitudinal direction of the yoke 8c can be rotated in the arrow W direction, and the reluctance of the magnetic path including the yoke 8c can be adjusted. Thirteenth embodiment (FIG. 15): In this embodiment, fixed yokes 8d and 8e are arranged near each magnetic pole of the permanent magnet 1, and a yoke 8f is provided in a gap portion between these yokes 8d and 8e.
Is rotatably attached. By rotating the yoke 8f, the series reluctance composed of the yokes 8d, 8f and 8e can be adjusted. Fourteenth embodiment (FIG. 16): In this embodiment, fixed yokes 8d and 8e are mounted facing the magnetic cores of the coils 2 and 2, and a cylinder between these yokes 8d and 8e. The yoke 8f is mounted in the gap. The yoke 8f can be rotated with a plane parallel to the magnetic axis of the permanent magnet 1 as a plane of rotation. By this rotation, the yoke 8d,
The series reluctance consisting of 8f and 8e can be adjusted. Fifteenth embodiment (FIG. 17): In this embodiment, a semi-disk shaped yoke 8g is fixed which faces each magnetic pole arranged at one end of the coil 2 and has a diameter in the arrangement direction of these magnetic poles. Further, a semi-disc shaped yoke 8h having the same center as the semi-disc shaped yoke 8g is rotatably attached.
According to this configuration, the effective cross-sectional area of the yoke facing the magnetic poles of the coil 2 can be changed, and the tone color can be adjusted.

Sixteenth embodiment (FIG. 18): In this embodiment, a yoke 8 is attached near one end of the coil 2 so as to be rotatable in a plane orthogonal to the axis of the coil 2, By rotating the yoke 8, the angle formed by the arrangement of the magnetic poles 21, 21, ... At the end of the coil 2 and the longitudinal direction of the yoke 8 can be changed. As a result, the magnetic flux passing through the yoke 8 can be changed, and thus the magnetic flux passing through the sounding body can be changed. Seventeenth Embodiment (FIG. 19): In this embodiment, a yoke 8 is attached near the magnetic pole of the permanent magnet 1 so as to be rotatable around one end thereof. By rotating the yoke 8, the distance and angle between the permanent magnet 1 and the yoke 8 can be changed, and the magnetic flux passing through the yoke 8 can be adjusted. 18th embodiment (FIG. 20): This embodiment is the same as the 16th embodiment, except that the yoke 8 can be rotated around its center point. According to this embodiment, when the yoke 8 is rotated, the timbre changes at a rotation angle of 90 degrees. Nineteenth embodiment (FIG. 21): In this embodiment, the yoke 8 in the fifth embodiment is mounted so as to be rotatable around one end thereof. According to this embodiment, the distance between the yoke 8 and one magnetic pole of the permanent magnet 1 can be adjusted, and the tone color can be adjusted.

Twentieth Embodiment (FIG. 22): In this embodiment, the coils 2 and 2 are provided on one side of the permanent magnet 1, and the yoke 8j is provided on the side opposite to the coils 2 and 2 with the permanent magnet 1 interposed therebetween. And 8k are installed. Here, the yoke 8j is the permanent magnet 1
It is fixed to one magnetic pole side, and the yoke 8k is attached to the other magnetic pole side of the permanent magnet 1 so as to be movable in parallel. Further, the fixed ends of the arms 80j and 80k are connected near the respective ends of the yokes 8j and 8k, and these arms are connected at the central portions thereof. Further, grooves 81j and 81k are formed in parallel with each other near the other ends of the yokes 8j and 8k, respectively, and in these grooves 81j and 81k,
A protrusion (not shown) formed at each free end of the arms 80k and 80j is inserted. In this way, a so-called parallel link is formed, and by moving the lever 82j formed at the free end of the arm 80j in the arrow X direction, the yoke 8k can be moved in the same direction in parallel. By moving the yoke 8k in parallel, the magnetic flux emitted from the permanent magnet 1 and passing through the yokes 8j and 8k can be changed, and the tone color can be adjusted. Twenty-first embodiment (FIG. 23): In this embodiment, the yoke 8k can be moved in parallel.
A moving mechanism different from the parallel link in the twentieth embodiment is provided. That is, in the yoke 8k, one end of the spring 83k is fixed to the side surface opposite to the yoke 8j, and the other end of the spring 83k is fixed to the main body (not shown), and the yoke 8k is connected by the spring 83k. It is biased in the direction of iron 8j. A gap adjusting mechanism 80 is provided between the yokes 8j and 8k to adjust the gap between them. Figure 24
The details of the interval adjusting mechanism 80 are shown in FIG. The trapezoidal members 84j and 84k are in contact with each other at their inclined surfaces, and their side surfaces opposite to these inclined surfaces are in contact with and fixed to the yokes 8j and 8k, respectively. A female screw 85j is formed on the trapezoidal member 84j, while a groove 85k having a width is penetrated through the trapezoidal member 84k. Then, the bolt 86 is inserted into the groove 85k of the trapezoidal member 84k.
Male screw portion is screwed to the female screw of the trapezoidal member 84j. According to this configuration, by rotating the bolt 86, the trapezoidal member 84k slides along the inclined surface of the trapezoidal member 84j, the distance between the yokes 8j and 8k is adjusted, and the yoke 8k.
Is translated.

Twenty-second embodiment (FIG. 25): This embodiment is the same as the twentieth to twenty-first embodiments, except that yokes 8j and 8k are used.
Are connected by deformable V-shaped members 87j and 87k so that the distance between the yokes 8j and 8k can be adjusted. Both ends of these members 87j and 87k may be attached to the yokes 8j and 8k, or may be integrally formed with the yokes 8j and 8k. Twenty-third embodiment (FIG. 26): In this embodiment, a substantially S-shaped yoke 88 is arranged on the side of the permanent magnet 1 opposite to the coils 2 and 2. The substantially S-shaped yoke 88 has a wide width in the vicinity of each magnetic pole of the permanent magnet 1, and a central portion connecting the wide width portions is formed so that the width is narrow and deformable. According to this embodiment, it is possible to adjust the interval between the wide portions of the yoke 88. Twenty-fourth embodiment (FIG. 27): This embodiment uses a yoke 89 having a depressed portion at the center. The yoke 89 is movably attached to the permanent magnet 1, and the amount of magnetic flux passing through the yoke 89 can be changed by moving the recessed portion of the yoke 89.

Further, in each of the following embodiments, the effect that the tone color of the electric musical instrument can be changed can be obtained. Twenty-fifth embodiment (FIG. 28): In this embodiment, the yoke 8 is replaced by the magnetic core 2
Arranged on the same side as the string S with respect to a so that the yoke 8 can be moved along the L-shaped guide groove 201 in the arrow X direction and the arrow Y direction and rotated in the arrow R direction. It was done. Twenty-sixth embodiment (FIG. 29): This embodiment is an application of the twenty-fifth embodiment to a pickup having two magnetic cores. In this embodiment, the yoke 8 is used as a U-shaped guide groove 2
It can be moved along 02 and rotated. Twenty-seventh embodiment (FIG. 30): In this embodiment, the permanent magnet 1d is arranged so as to be movable with respect to the magnetic core 2a. 28th Embodiment (FIG. 31): This embodiment is an application of the 27th embodiment to a pickup having two magnetic cores.
The permanent magnet 1d is attached to a support member 1e having one end screwed into the bolt 11 and the other end having a through hole inserted into the guide rod 1f, and by rotating the bolt 11, the permanent magnet 1d moves in the arrow Y direction. ..

[0031]

As described above, according to the pickup for an electric musical instrument of the present invention, it is possible to finely adjust the timbre, and also to perform the timbre adjustment even after it is attached to the electric musical instrument. effective.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of an electric musical instrument pickup according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration example of an excitation power supply 5 in the embodiment.

FIG. 3 is a configuration diagram of an electric musical instrument pickup according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of an electric musical instrument pickup according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of an electric musical instrument pickup according to a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of an electric musical instrument pickup according to a fifth embodiment of the present invention.

FIG. 7 is a diagram illustrating a magnetic circuit in the example.

FIG. 8 is a structural diagram of an electric musical instrument pickup according to a sixth embodiment of the present invention.

FIG. 9 is a configuration diagram of an electric musical instrument pickup according to a seventh embodiment of the present invention.

FIG. 10 is a configuration diagram of an electric musical instrument pickup according to an eighth embodiment of the present invention.

FIG. 11 is a configuration diagram of an electric musical instrument pickup according to a ninth embodiment of the present invention.

FIG. 12 is a structural diagram of an electric musical instrument pickup according to a tenth embodiment of the present invention.

FIG. 13 is a configuration diagram of an electric musical instrument pickup according to an eleventh embodiment of the present invention.

FIG. 14 is a configuration diagram of an electric musical instrument pickup according to a twelfth embodiment of the present invention.

FIG. 15 is a structural diagram of an electric musical instrument pickup according to a thirteenth embodiment of the present invention.

FIG. 16 is a structural diagram of an electric musical instrument pickup according to a fourteenth embodiment of the present invention.

FIG. 17 is a configuration diagram of an electric musical instrument pickup according to a fifteenth embodiment of the present invention.

FIG. 18 is a configuration diagram of an electric musical instrument pickup according to a sixteenth embodiment of the present invention.

FIG. 19 is a configuration diagram of an electric musical instrument pickup according to a seventeenth embodiment of the present invention.

FIG. 20 is a configuration diagram of an electric musical instrument pickup according to an eighteenth embodiment of the present invention.

FIG. 21 is a configuration diagram of an electric musical instrument pickup according to a nineteenth embodiment of the present invention.

FIG. 22 is a configuration diagram of an electric musical instrument pickup according to a twentieth embodiment of the present invention.

FIG. 23 is a structural diagram of an electric musical instrument pickup according to a twenty-first embodiment of the present invention.

FIG. 24 is a configuration diagram of a gap adjusting mechanism 80 in the embodiment.

FIG. 25 is a structural diagram of an electric musical instrument pickup according to a twenty-second embodiment of the present invention.

FIG. 26 is a configuration diagram of an electric musical instrument pickup according to a twenty-third embodiment of the present invention.

FIG. 27 is a configuration diagram of an electric musical instrument pickup according to a twenty-fourth embodiment of the present invention.

FIG. 28 is a configuration diagram of an electric musical instrument pickup according to a twenty-fifth embodiment of the present invention.

FIG. 29 is a configuration diagram of an electric musical instrument pickup according to a twenty-sixth embodiment of the present invention.

FIG. 30 is a configuration diagram of an electric musical instrument pickup according to a twenty-seventh embodiment of the present invention.

FIG. 31 is a configuration diagram of an electric musical instrument pickup according to a twenty-eighth embodiment of the present invention.

[Explanation of symbols]

1 ... Permanent magnet, 2 ... Detection coil, 5 ... Excitation power supply, 6 ... Excitation coil, 7 ... Electromagnet, 8 ... Yoke.

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[Procedure amendment]

[Submission date] January 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

According to the inventions of claims 3 to 4,
The magnetic flux generated from the magnetic core is divided into a magnetic path including a sounding body, a magnetic path including a magnetic flux guiding member, and a magnetic path passing through a space without passing any path thereof. Therefore, by changing the mounting mode of the magnetic flux induction member, the magnetic field emitted from the magnetic core and acting on the sounding body is changed, and the vibration of the sounding body and its conversion operation into an electric signal are changed. Changes. At the same time, the coil is made of a ferromagnetic material.
The magnetic flux induction member, magnet, etc.
More, coil impedance-frequency characteristics, induced current
Distortion characteristics, transient response characteristics, etc. change, resulting in output characteristics
And so on, you can change the timbre.

Claims (5)

[Claims] 1. A pickup for an electric musical instrument, comprising: a magnetic core closely facing the sounding body; and a coil wound around the magnetic core, converting vibration of the sounding body into an electric signal and outputting the electric signal from the coil. 2. An electric musical instrument pickup according to claim 1, wherein the coil is provided with an exciting means for supplying an exciting current. 2. A pickup for an electric musical instrument, comprising: a magnetic core closely facing the sounding body; and a coil wound around the magnetic core, converting vibration of the sounding body into an electric signal and outputting the electric signal from the coil. 2. An electric musical instrument pickup according to claim 1, further comprising: an auxiliary coil wound separately from the coil, and auxiliary excitation means for supplying an excitation current to the auxiliary coil. 3. A pickup for an electric musical instrument, comprising: a magnetic core closely facing the sounding body; and a coil wound around the magnetic core, converting vibration of the sounding body into an electric signal and outputting the electric signal from the coil. 2. A pickup for an electric musical instrument, characterized in that a magnetic flux induction member made of a ferromagnetic material is provided in the vicinity of the magnetic core. 4. A pickup for an electric musical instrument, comprising: a magnetic core closely facing the sounding body; and a coil wound around the magnetic core, converting the vibration of the sounding body into an electric signal and outputting the electric signal from the coil. The magnetic flux guide member made of a ferromagnetic material movably arranged near the magnetic core, and a displacement mechanism for displacing the magnetic flux guide member with respect to the magnetic core. Pickup for musical instruments. 5. A pickup for an electric musical instrument, comprising: a magnetic core closely facing the sounding body; and a coil wound around the magnetic core, converting vibration of the sounding body into an electric signal and outputting the electric signal from the coil. The magnetic instrument pickup according to claim 1, further comprising: a magnetic flux generating member movably disposed near the magnetic core; and a displacement mechanism that displaces the magnetic flux generating member with respect to the magnetic core.