JP5820417B2 - Stringed instrument - Google Patents

Description

  The present invention relates to improvements in stringed instruments.

  Between the magnetic pickup provided inside the resonance cylinder that constitutes the stringed instrument and the plate-like or film-like resonator located on the front side of the resonance cylinder, the ferromagnetic body is made not to contact the resonance body. There exists a thing shown by patent document 1 as a stringed instrument formed by arranging the comprised metal foil.

  The magnetic pickup is a combination of a coil and a permanent magnet, and detects a change in the magnetic field of the permanent magnet as an electrical signal. In the case of Patent Document 1, when the metal foil disposed in the resonance cylinder vibrates due to the vibration of the resonance body, the magnetic field changes, so that the vibration can be detected and output as an electric signal. Although the thing of this patent document 1 can take out the sound close | similar to the original sound of a stringed instrument with the said magnetic pick-up, a clearance gap is respectively provided between a resonator and metal foil, and between metal foil and magnetic pick-up. Due to the structure provided, the sound collecting power was likely to be weak.

JP 2010-191263 A

  A main problem to be solved by the present invention is that a stringed instrument in which a magnetic pickup is arranged inside the resonance cylinder so that the vibration of the resonator constituting the resonance cylinder can be output by the magnetic pickup. The sound collecting power can be effectively improved while the sound close to the original raw sound can be extracted.

In order to achieve the above object, according to the present invention, the stringed instrument is affixed of a foil or plate made of a ferromagnetic material that is affixed to a plate-like or membrane-like resonator constituting the resonance drum. Body,
A magnetic pickup disposed at a position directly below the attachment position of the sticking body within the resonance cylinder, with a gap between the resonance body and one of the magnetic poles facing the sticking body side; ,
A magnet arranged side by side with the magnetic pickup inside the resonance cylinder in a state where a side surface is magnetically attracted to the side surface of the magnetic pickup;
The magnetic pickup and a container made of a ferromagnetic material in which a magnet is accommodated are provided.

One preferred embodiment of the present invention is that the adhesive body is composed of an outer adhesive body that is attached to the outer surface of the resonator and an inner adhesive body that is attached to the inner surface of the resonator. One.

According to the present invention, in a stringed instrument in which a magnetic pickup is arranged inside the resonance cylinder so that the vibration of the resonance body constituting the resonance cylinder can be output by the magnetic pickup, the magnetic pickup makes a sound close to the original raw sound of the string instrument. The sound collecting power can be effectively improved while the sound can be taken out.

FIG. 1 is a front view of a shamisen resonance drum constructed by applying the present invention. FIG. 2 is a cross-sectional configuration diagram taken along the line AA in FIG. FIG. 3 is an enlarged configuration diagram of a main part of FIG. FIG. 4 is a perspective configuration diagram showing the magnetic pickup and the magnet constituting the shamisen separately. FIG. 5 is a perspective configuration diagram showing the magnetic pickup and the magnet constituting the shamisen with a part of the container broken. FIG. 6 is a front structural view of a resonance drum of an acoustic guitar constructed by applying the present invention. FIG. 7 is a cross-sectional configuration diagram showing an example in which a part of the configuration of the shamisen shown in FIGS. 1 to 3 is changed.

  A typical example of the stringed instrument S configured by applying the present invention will be described below with reference to FIGS. FIG. 1 shows an example in which the present invention is applied to a shamisen, and FIG. 6 shows an example in which the present invention is applied to a guitar.

  The stringed instrument S according to this embodiment includes a resonance body 1 and a string 2, and a sound is produced by repelling or rubbing the string 2. However, the present invention can be applied to various stringed instruments S, specifically, acoustic guitar, classical guitar, violin, mandolin, cello, ukulele, viola, contrabass, Taisho koto, shamisen, serpentine, and wrinkles. Is.

  In the stringed musical instrument S according to this embodiment, the magnetic pickup 3 is provided inside the resonance body 1, and the vibration of the string 2 transmitted to the resonator 2 is transmitted as an electric signal through the magnetic pickup 3. It can be detected and output.

  The stringed instrument S includes a sticking body 4, a magnetic pickup 3, a magnet 5, and a container 6.

  The sticking body 4 is made of a foil or a plate made of a ferromagnetic material stuck to a plate-like or film-like resonator 1 a located on the front side of the resonance cylinder 1. Typically, the sticking body 4 is composed of an iron foil body or a plate body. In the illustrated example, the sticking body 4 has a rectangular shape, and is adhered to the resonance body 1a by bonding one surface thereof to the resonance body 1a.

  The magnetic pickup 3 has a gap between the resonance body 1a at a position directly below the sticking position of the sticking body 4 inside the resonance drum 1, and on the sticking body 4 side. It is arranged with one of the magnetic poles facing. As the magnetic pickup 3, a known magnetic pickup 3 having a rod shape is used. In the illustrated example, the magnetic pickup 3 has a built-in magnet and a coil (not shown) incorporated in a hexahedron made of synthetic resin having four elongated rectangular side surfaces 3a ... 3a and two end surfaces 3b, 3b. . Reference numeral 3c in the figure is an output line of the detected electrical signal. In the illustrated example, the built-in magnet has one of the magnetic poles directed to one of the two side surfaces 3a ′ and 3a ′ at the opposite positions of the four side surfaces 3a... 3a of the hexahedron. It is built in the hexahedron so that the other of the magnetic poles faces the other of the side surfaces 3a ′ and 3a ′. In this embodiment, one of the two side surfaces 3 a ′ and 3 a ′ opposite to the hexahedron is placed on the side of the sticking body 4 in the inside 1 b of the resonance cylinder 1 by the support member 7 described later. The magnetic pickup 3 is supported in such a manner as to face.

  The magnet 5 is juxtaposed to the magnetic pickup 3 in the interior 1 b of the resonance cylinder 1 with the side surface 5 a ″ magnetically attracted to the side surface 3 a ″ of the magnetic pickup 3. As this magnet 5, a neodymium magnet is suitable. In the illustrated example, the magnet 5 also has a hexahedral shape having four side surfaces 5a... 5a that are elongated and rectangular and two end surfaces 5b and 5b. Further, the magnet 5 has one of the magnetic poles positioned on one of the two side surfaces 5a ′ and 5a ′ at the opposed positions of the four side surfaces 5a... 5a, and the two side surfaces 5a ′ and 5a ′. The other side of the magnetic pole is positioned on the other side. In the illustrated example, among the four side surfaces 3a ... 3a of the hexahedron constituting the magnetic pickup 3, one of the two side surfaces 3a ", 3a" to which the magnetic poles of the built-in magnets constituting this are not directed, The magnet 5 is arranged next to the magnetic pickup 3 in a state in which one of the two side surfaces 5a ", 5a" where the magnetic pole of the magnet 5 is not located is magnetically attracted. . For example, when the N pole of the built-in magnet constituting this is located on the side surface 3a ′ directed to the sticking body 4 in the magnetic pickup 3, the side face directed to the sticking body 4 in the magnet 5 The magnet 5 is disposed next to the magnetic pickup 3 so that the S pole of the magnet 5 is positioned at 5a ′. (FIG. 4) Typically, the magnet 5 arranged in parallel to the magnetic pickup 3 as described above is bonded to the magnetic pickup 3.

  The container 6 houses the magnetic pickup 3 and the magnet 5 and is made of a ferromagnetic material such as iron. In the example shown in the figure, the magnetic pickup 3 and the magnet 5 attracted thereto are wrapped with iron foil without any gaps. That is, in the illustrated example, such iron foil functions as the container 6. The container 6 is made of a ferromagnetic material, and can also be made of a case-like one in which the magnetic pickup 3 and the magnet 5 are housed.

  When the magnetic pickup 3 is brought into close contact with the sticking body 4, the sound taken out by the magnetic pickup 3 becomes a longer sound than the original sound of the stringed instrument S. On the other hand, in the stringed musical instrument S according to this embodiment, the magnetic pickup 3 is located at a position directly below the sticking position of the sticking body 4 inside the resonance drum 1 and the resonance body 1a. Therefore, the magnetic pickup 3 can extract a sound close to the original sound of the stringed instrument S. That is, the sound that is electrically output via the magnetic pickup 3 is a sound that naturally occurs from the stringed instrument S, that is, a so-called raw sound (a sound that is naturally transmitted from the resonance drum 1 of the stringed instrument S by air vibration without passing through the pickup). As close as possible. That is, an acoustic guitar original sound can be electrically output via the magnetic pickup 3 if it is an acoustic guitar original sound and a shamisen original sound can be output if it is a shamisen. In the stringed musical instrument S according to this embodiment, the magnet 5 arranged in parallel as described above and the function of the housing 6 that houses the magnetic pickup 3 together with the magnet 5 are directly below the sticking body 4. It was confirmed that the sound collecting power was remarkably improved as compared with the case where the magnetic pickup 3 was simply arranged at the position.

  In the illustrated example, the magnetic pickup 3 accommodated in the accommodating body 6 with the magnets 5 arranged side by side is resonated as described above by the support member 7 attached to the side portion inside the resonance cylinder 1. It is arranged in the trunk 1.

  In the illustrated example, the support member 7 includes a surface portion 7a facing the inner surface of the resonance body 1a located on the front side (the side where the strings are stretched) of the resonance cylinder 1, and the magnet 5 is provided on the surface portion 7a. The magnetic pickup 3 accommodated in the accommodating body 6 is fixed in a state where the two are arranged side by side, and is fixed to the side portion of the resonance cylinder 1 via a bracket.

  In the application example of the shamisen (FIG. 1), the support member 7 is fixed to the side portion of the resonance cylinder 1 on the side of the rectangular frame-shaped resonance cylinder 1 facing the side where the collar is attached. The magnetic pickup 3 supported by the support member 7 is positioned substantially directly behind the sticking body 4 when the resonance cylinder 1 is viewed from the front. In the illustrated example, the sticking body 4 has a larger area than the side surface 3 a of the magnetic pickup 3. Typically, in the case of the shamisen, the thickness of the skin as the resonator 1a is about 1 mm, and the adhesive body 4 is fixed to the inner surface of the skin, and between the adhesive body 4 and the magnetic pickup 3 The magnetic pickup 3 is supported by the support member 7 so that an interval in the range of 1 mm to 5 mm is formed.

  FIG. 6 shows an application example of an acoustic guitar. In this application example, the magnetic pickup 3 accommodated in the accommodating body 6 with the magnets 5 arranged in parallel is a support member disposed in the resonance cylinder 1 so as to extend between the left and right side portions of the resonance cylinder 1. 8 is arranged below the inner surface of the front shell (front plate) as the resonator 1 a located on the front side of the resonance body 1, that is, on the stringing side.

  FIG. 7 shows an example in which the sticking body 4 is composed of an inner sticking body 4 ′ stuck to the inner surface of the resonator 1a and an outer sticking body 4 ″ stuck to the outer surface of the resonator 1a. In this case, it was recognized that the sound extracted by the magnetic pickup 3 is closer to the original sound of the stringed instrument S.

1 Resonance body 1a Resonator 3 Magnetic pickup 3a "
4 Adhering body 5 Magnet 5a ”Side surface 6 Container

Claims (2)

A sticking body made of a ferromagnetic material foil or a plate attached to a plate-like or film-like resonator constituting the resonance cylinder; and
A magnetic pickup disposed at a position directly below the attachment position of the sticking body within the resonance cylinder, with a gap between the resonance body and one of the magnetic poles facing the sticking body side; ,
A magnet arranged side by side with the magnetic pickup inside the resonance cylinder in a state where a side surface is magnetically attracted to the side surface of the magnetic pickup;
A stringed musical instrument comprising the magnetic pickup and a container made of a ferromagnetic material that houses a magnet. The stringed instrument according to claim 1, wherein the sticking body is constituted by an outer sticking body attached to the outer surface of the resonator and an inner sticking body attached to the inner surface of the resonator. .

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