JP2021064923A - Stringed instrument oscillating device - Google Patents

Abstract

To provide a method of faithfully listening to an original sound of a stringed instrument by vibrating a sound cylinder of the stringed instrument with a signal of a sound source of the stringed instrument such as a CD and radiating the sound, a structure of the stringed instrument oscillating device that vibrates the source of the stringed instrument to enjoy the original music of the stringed instrument by vibrating the sound cylinder of the stringed instrument to radiate the sound.SOLUTION: A magnetic circuit 21 is fixed to a lower plate 20, and a vibration plate 10 to which a voice coil 11 is fixed is joined to a vibration plate fixing side plate 22 joined to the lower plate 20 while maintaining an appropriate clearance between the magnetic circuit 21 and the voice coil 11, a vibration conduction plate 12 that transmits the vibration of the vibration plate 10 is fixed perpendicularly to the vibration plate 10, the tip of the vibration conducting plate 12 is brought into contact with a saddle 31 which is an oscillating portion of a stringed instrument with a stringed instrument sound cylinder at an angle of 0 to 90 degrees. A sound source signal is supplied to the voice coil via a terminal 13 and a signal line 14, the vibrating plate 10 and the vibration conducting plate 12 are vibrated by the action of the magnetic circuit 21 and the voice coil 11, the vibration source saddle 31 of the stringed instrument is vibrated, the stringed instrument sound cylinder 30 is vibrated, and sound is emitted from the stringed instrument.SELECTED DRAWING: Figure 2

Description

The present invention relates to a stringed instrument oscillating device that radiates music from a stringed instrument by oscillating the sound cylinder of the stringed instrument with a music signal.

A speaker used in an audio device radiates the vibration of a diaphragm such as a cone directly or by a horn type by a driving method such as a conductive type, and converts electric energy into acoustic energy. Therefore, the sound wave radiated from the speaker has directivity, and the listening position is specified in relation to the speaker. Moreover, the sound waves obtained from the diaphragm are air sounds, which are still uncomfortable compared to natural sounds, and have not yet fully satisfied the demands of music lovers and music professionals who are particularly sensitive to sound quality.
Also, when listening to a conventional speaker using an audio device on a CD or the like on which the performance of a stringed instrument such as a guitar or violin is recorded, the music radiated from the speaker is different from the sound of the original stringed instrument, and you can enjoy the music of the stringed instrument. I can't.

The present inventor has developed a sound cylinder radiation type speaker that solves the problem of sound radiation by a conventional diaphragm and introduced it as Patent No. 4210718. In the introduced sound cylinder radiation type speaker, as shown in FIG. 1, the voice coil 3 is fixed to the sound plate 2 which constitutes a part of the sound cylinder 1, and the magnetic circuit 6 is fixed to the frame 5 which stands up from the base 4. ing. The magnetic circuit 6 and the voice coil 3 convert electrical energy into acoustic energy, and vibrate the soundboard 2 and the entire sound cylinder 1 to radiate sound. As a result, the directivity is widened, and a natural sound that is comfortable to listen to can be obtained.

Prior art distribution

Patent documents

Patent No. 421718

The present inventor has studied a method of vibrating the sound cylinder of a stringed instrument to radiate sound and faithfully listening to the original sound of the stringed instrument by utilizing the previously proposed driving method of the sound cylinder radiation type speaker. Then, he examined the structure of the oscillating device that vibrates the oscillating source of the stringed instrument, and found that he could enjoy the original music of the stringed instrument by vibrating the sound cylinder of the stringed instrument to radiate the sound.

The present invention employs a vibration method similar to that of the above-mentioned sound cylinder radiation type speaker. The magnetic circuit is fixed to the lower plate, and the vibration plate with the voice coil fixed is joined to the vibration plate fixing side plate joined to the lower plate while maintaining an appropriate clearance between the magnetic circuit and the voice coil, and vibration is performed. The vibration conduction plate that transmits the vibration of the plate is fixed perpendicular to the vibration plate, and the tip of the vibration transmission plate is brought into contact with the piece or saddle that is the vibration part of the stringed instrument at an angle of 0 to 90 degrees with the stringed instrument sound cylinder. Emit sound from a stringed instrument.

When an electric signal from the sound source flows through the voice coil, the vibration plate vibrates due to the action with the magnetic circuit. The vibration of the vibration plate is conducted to the piece or saddle that is the vibration source of the stringed instrument via the vibration conduction plate, the sound cylinder of the stringed instrument vibrates, and the sound of the sound source is faithfully radiated from the stringed instrument, and the original music of the stringed instrument is produced. It becomes possible to listen.

Side sectional view showing the internal structure of the sound cylinder radiation type speaker previously proposed by the present inventor. Overall view which shows the stringed instrument oscillating device of the Example of this invention

In the stringed instrument exciter according to the embodiment of the present invention, the magnetic circuit 21 is fixed to the lower plate 20 and the voice coil 11 is fixed to the exciter plate 10 as shown in FIG. The vibration plate 10 is joined to the vibration plate fixing side plate 22 fixed to the lower plate 20 while maintaining an appropriate clearance between the voice coil 11 and the magnetic circuit 21. The vibrating conductor 12 is fixed vertically to the vibrating plate 10. The tip of the vibration conducting plate 12 is brought into contact with the saddle 31, which is the source of vibration of the stringed instrument guitar, with the guitar sound cylinder 30 at an angle of 30 degrees. A signal line 14 is attached to the voice coil 11 and is connected to an external sound source via the terminal 13.

When an electric signal is supplied to the voice coil 11 from the sound source, the vibration plate 10 vibrates due to the action of the magnetic circuit 21 and the voice coil 11, and the vibration is generated by the stringed instrument guitar via the vibration conduction plate 12 joined to the vibration plate 10. Conducted by the saddle 31 of the stringed instrument, the sound cylinder 30 of the stringed instrument guitar vibrates and music is radiated.

A rosewood having a thickness of 5 mm and a size of 50 mm × 130 mm was used for the vibration plate 10, and a voice coil 11 having a coil diameter of 20 mm was fixed to the central portion of the vibration plate 10. A mahogany plate having a thickness of 20 mm and a size of 80 mm × 130 mm was used for the lower plate 20, and a magnetic circuit 21 having a magnet diameter of 80 mm was fixed to the central portion of the lower plate 20. For the vibration plate fixing side plate 22, two mahogany plates having a thickness of 20 mm and a size of 50 mm × 35 mm were used and fixed to both ends of the lower plate 20. The clearance between the magnetic circuit 21 and the voice coil 11 was kept constant, and the vibration plate 10 was joined to the vibration plate fixing side plate 22. A spruce plate having a thickness of 8 mm, a size of 80 mm, and a length of 250 mm was used as the vibration conducting plate 12, and was fixed vertically to the vibration plate 10 at the center of the vibration plate 10. A stringed instrument oscillating device was created by fixing a base plate 23 of a triangular mahogany having a thickness of 20 mm and a size of 40 mm × 70 mm to a lower plate 20 so that the guitar sound cylinder 30 and the vibration conducting plate 12 maintain an angle of 30 degrees.

The tip of the vibrating conductor 12 of the stringed instrument exciter was brought into contact with the saddle 31 of the guitar. When an acoustic signal is input to the voice coil 11 from an external sound source via the terminal 13 and the signal line 14, vibration corresponding to the acoustic signal is generated in the voice coil 11 due to the magnetic force of the magnetic circuit 22, and the vibration is generated by the vibration plate 10. The saddle 31 of the guitar vibrates through the vibrating conductor 12 joined to the vibrating plate 10, the sound cylinder 30 of the guitar vibrates, and sound is radiated. The sound radiated from the sound cylinder 30 of the guitar is as close as possible to the sound of the guitar itself, making it possible to enjoy the music of the guitar. In addition, this stringed instrument oscillating device can be used for all stringed instruments such as violin, cello, ukulele and shamisen.

When listening to a music source such as a CD or LP of a stringed instrument, the stringed instrument exciter of the present invention can hear the sound radiated from the sound cylinder of the stringed instrument, so that it is as close as possible to the sound of the stringed instrument itself, and is a conventional speaker. You can listen to music that is close to the live sound of stringed instruments such as guitars, violins, and samisen, which cannot be obtained by listening with. Therefore, you can listen to performances that are close to the live performances of famous musicians. In addition, stringed instruments need to be aged for a long time until the sound stabilizes, but it is possible to ease the aging of stringed instruments in a short period of time by playing a stringed instrument with this stringed instrument oscillator for a long time on a CD or LP. It is possible.
In addition, since this stringed instrument oscillator emits vibration close to the original sound, it can be used as a speaker by contacting it with a resonator such as a wooden box.

1: Sound cylinder 2: Sound plate 3: Voice coil 4: Base 5: Frame 6: Magnetic circuit 10: Vibration plate 11: Voice coil 12: Vibration conduction plate 13: Terminal 14: Signal line 20: Lower plate 21: Magnetic circuit 22: Vibration plate fixed side plate 23: Base plate 30: Guitar sound cylinder 31: Saddle

Claims (1)

The magnetic circuit is fixed to the lower plate, and the vibration plate with the voice coil fixed is joined to the vibration plate fixing side plate joined to the lower plate while maintaining an appropriate clearance between the magnetic circuit and the voice coil. The vibration conduction plate that transmits the vibration of the vibration plate is fixed perpendicularly to the vibration plate, and the tip of the vibration conduction plate is brought into contact with the vibration part of the stringed instrument at an angle of 0 to 90 degrees to produce sound from the stringed instrument. A stringed instrument vibration device characterized by being able to radiate.

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