JPH09134168A - Player device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain presence like direct listening to a live musical performance although the constitution is simple. SOLUTION: A driving coil 11 transduces a voice current into mechanical vibrations, which are transmitted from a rod 21 to the bridge 45 of a violin 42. Consequently, the belly 49 of the violin 42 vibrates and a sound is generated here. Therefore, the sound which is extremely close to that when the violin is actually played can be reproduced faithfully by the part of the belly 49 of the violin 42 which can not bear comparison with a conventional speaker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a player device which faithfully reproduces an original sound by using a stringed instrument of the violin genus.

[0002]

As a device for converting a sound current into a mechanical vibration to obtain a sound output, a voice coil is wound around one end of a bobbin attached with a cone-shaped diaphragm, and a magnetic circuit is combined with this voice coil. Speakers are conventionally known. In such a speaker, if the center of gravity of the diaphragm and the drive center of the voice coil are not aligned, the diaphragm will not vibrate properly and the original sound cannot be faithfully reproduced. Therefore, for example, Japanese Examined Patent Publication No. 57-56279 discloses that the amount of air entering from both sides of the central partition of the voice coil cylinder is controlled to arbitrarily adjust the position of the diaphragm or the voice coil.

By the way, such a conventional speaker is
Since the sound is reproduced through a diaphragm such as cone paper, the fidelity to the original sound is insufficient, and no matter how expensive a speaker is, it is not possible to obtain the realism of listening directly to a live performance. I was dissatisfied.

In view of the above problems, it is an object of the present invention to provide a player device which has a simple structure and can provide a realistic sensation of directly listening to a live performance.

[0005]

The present invention provides a violin,
It is characterized in that the resonance mechanism of string instruments called so-called violins such as viola, cello and contrabass is used as an alternative to the diaphragm of the conventional speaker.

That is, in the player device according to the present invention as set forth in claim 1, a drive coil for converting an audio current into mechanical vibration, a rod-shaped member having a base end connected to a vibrating portion of the drive coil, and a tip of the rod-shaped member. It is composed of a stringed instrument of the violin genus that is connected to a piece.

According to the above construction, the mechanical vibration from the driving coil is transmitted from the rod-shaped member to the bridge supporting the string of the stringed instrument such as the violin, so that the stringed instrument's body feels as if it were actually played. Sound is played from the part.

According to a second aspect of the present invention, in addition to the structure of the first aspect, the player device constitutes the rod-shaped member by connecting a Fernhambuco lumber to a metal rod.

The Fernham Buko wood referred to here is a natural wood widely known to those skilled in the art as a raw material for a bow support member used when rubbing the strings of a stringed instrument. Fernham Buko wood is said to produce the best sound when a string is rubbed with a bow to produce a sound. Can effectively absorb the unwanted resonances of the instrument, yet still have a beautiful, clear and uncluttered sound from the body of a stringed instrument, such as when a string is rubbed with a bow. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, each embodiment of the present invention will be described.
Description will be given with reference to the accompanying drawings. First, the overall configuration of the apparatus will be described with reference to FIGS. 1 to 3. Reference numeral 1 is a base, 2 is a casing provided on one side of a table, and each of these is constructed by combining wooden plate materials. Inside the casing 2, a magnetic circuit 7 in which an annular magnet 6 is provided between a bottom plate 4 having a center pole 3 in the center and an upper plate 5 is supported by a metal frame 8. A voice coil 9 is provided in the magnetic gap 10 of the magnetic circuit 7 so as to be freely swingable. The voice coil 9 and the magnetic circuit 7 constitute a drive coil 11 for converting a voice current into mechanical vibration. A cylindrical cap 12 that is a vibrating portion of a drive coil 11 that transmits vibration of other members is attached to the tip end side of the voice coil 9. In this embodiment, the cap 12 has a diameter of 53 mm.
Reference numeral 13 is a damper for supporting the voice coil 9 at a position where it is loosely inserted in the center pole 3 and for restricting lateral vibration of the voice coil 9. As the drive coil 11 in this embodiment, the existing cone type speaker with the diaphragm removed is used as it is.

Reference numeral 21 denotes the casing 2 from the center of the cap 12.
Is a rod that is a rod-shaped member that is provided so as to extend to the outside.
Each member of the rod 21 is made of an aluminum alloy, and the first bar member has a base end attached to the center of the cap 12.
22, a second rod 24 connected to the tip of the first rod 22 via a screw 23, and a clasp 26 connected to the tip of the second rod 24 via a screw 25. It is composed of The clinging body 26 is
Flat plate-shaped first member attached to the second rod member 24 by the screw 25
The pressing member 27 and the second pressing member 29 detachably provided on the first pressing member 27 by the screw 28. An anti-slip material 30 such as sandpaper is attached to one side surface where the first and second pressing members 27 and 29 face each other. The anti-slip material 30 has an action of surely bringing the clinging body 26 into contact with the piece 45 described later, and thereby, the mechanical vibration transmitted to the rod 21 can be faithfully transmitted to the piece 45.

On the other hand, 40 is a side plate 41 of a stringed instrument of the violin genus.
It is a U-shaped elastic piece that holds the. In this embodiment, the violin 42 is attached to the elastic piece 41 with the spiral 43 as the upper part. The structure of the violin 42 is no different from what is generally played, and as is well known, a plurality of strings 44 are attached to a wooden piece 45.
In addition to supporting with, the piece 45
A front plate 46 attached to the upper surface, a back plate 47 provided apart from the front plate 46, and a soul column 48 for transmitting the vibration transmitted from the piece 45 to the back plate 47 are provided.

The elastic piece 41 is attached and fixed to a table 51 movably provided on the flat surface of the base 1. Also,
The casing 2 can be moved in the height direction by a rotatable bolt 52. Therefore, even if the shape of the violin 42 is slightly different, the tip of the rod 21 can be reliably connected to the piece 45 of the violin 42 by operating the table 51 and the bolt 52.

The diameter of the first rod 22 in this embodiment is 7
mm, and the second rod 24 is formed to have a diameter of 5 mm. Further, in order to reproduce a faithful sound from the body 49 of the violin 42, when the rod 21 is made of a single aluminum alloy material, when the rod 21 is formed from the base end of the first rod 22, It is preferable to set the shortest length to the contact portion to 145 mm. This applies when the violin 42 is used as a stringed instrument of the genus Violin.

Next, the electrical construction of this embodiment will be described with reference to FIG. Reference numerals 51 and 52 denote L channel and R channel output terminals of the stereo amplifier 53, and 54 denotes a pair of changeover switches. By operating the changeover switch 54,
The audio current from each output terminal 51, 52 is output to a stereo speaker.
It is designed to feed either 55, 56 or casing 2. Reference numeral 57 is a dummy resistor having the same resistance value of 8 ohms as the stereo speakers 55 and 56. According to FIG. 4, the changeover switch 54 is set to one side (normally closed terminal 54
When it is moved to (a side), the output terminal 51 is connected to the casing 2, while the output terminal 52 is connected to the dummy resistor 57, and when the changeover switch 54 is moved to the other side (normally open terminal 54b side), the output terminal 51 is connected. The stereo speaker 55, the output terminal 52, and the stereo speaker 56 are connected to each other.

Inside the casing 2, the main switch 61
The coil portion 62a of the relay 62 and the neon lamp 63 as a display are connected to both ends of the power plug 64. Further, when the main switch 61 is turned on, the contact 62b of the relay 62 that supplies the audio current from the output terminal 51 to the drive coil 11 is connected to the normally closed terminal 54a of the one changeover switch 54 by the external terminal 65. And the drive coil 11. Therefore, in this configuration, if the main switch 61 is pressed with the selector switch 54 switched to one side, the stereo amplifier
Audio current from the R channel 53 is supplied to the drive coil 11 in the casing 2.

The operation of the above configuration will be described below. When the changeover switch 54 is switched to the other side, the audio current from the stereo amplifier 53 is directly supplied to the stereo speakers 55 and 56 via the changeover switch 54. , Sound is reproduced from each stereo speaker 55, 56. This is the same as the commonly known existing stereo device.

On the other hand, when the power switch 64 is properly inserted into the outlet and the main switch 61 is pushed while the selector switch 54 is switched to one side, the contact 62b of the relay 62 is switched and the R channel of the stereo amplifier 53 is switched. Is supplied to the drive coil 11. When the drive coil 11 converts this voice current into mechanical vibration, the mechanical vibration is transmitted from the rod 21 to the bridge of the violin 42 as it is, and the body 49 of the violin 42 vibrates to generate sound.

The present embodiment is characterized in that not only the violin 42, but also the resonance mechanism of a stringed instrument of the so-called violin genus such as viola, cello and contrabass is used as an alternative to the diaphragm of the conventional speaker. is there. These stringed instruments vibrate the strings 44 due to friction with the horsehair bow originally coated with pine resin, and the vibrations of the strings 45 to the front plate 46.
Sound from the soul column 48 to the back plate 47 having a slightly different minimum natural frequency (fundamental frequency) from the soul column 48, a sound peculiar to a stringed instrument such as the so-called violin 42 is formed on the front plate 46. The f holes are mainly generated from the pair of f holes. At this time, the bridge 45 plays an important role of converting the lateral vibration transmitted from the string 44 to the orthogonal direction. Therefore, if mechanical vibration with the same frequency as when rubbing the string 44 with a bow is applied to the piece 45 from the outside,
The inventor of the present application has found that it is possible to reproduce a sound as close as possible when actually played from such a stringed instrument, which is incomparable with a conventional high-class speaker.

Specifically, a drive coil 11 for converting a sound current into mechanical vibration, a rod 21 having a base end connected to the cap 12 of the drive coil 11, and a piece 45 connected to the tip of the rod 21. Drive coil with only the violin 42
The mechanical vibration from 11 is transmitted from the rod 21 to the piece 45 that supports the string 44 of the violin 42, so that the sound is faithfully reproduced from the part of the body 49 of the violin 42 as if the violin 42 is actually playing. can do. That is, with a simple structure in which the drive coil 21 and the piece 45 of the violin 42 are simply connected by the rod 45, it is possible to obtain a realistic sensation of directly listening to a live performance.

Referring to the violin 42, the musical instrument sound of the violin 42 has a fundamental frequency in a specific range and a frequency component which is an integral multiple of this fundamental frequency. Therefore,
It is preferable that the frequency component of the voice current be as close as possible to the frequency component of the musical instrument sound of the violin 42. In particular, when the playing sound of a violin (unaccompanied) recorded on a cassette tape or a compact disc is directly supplied to the drive coil 11 as an audio current, the sound played by the violin 42 itself is generated from the body 49. This is because the frequency component of the recorded sound of the violin is almost the same as the frequency component of the violin 42. In addition to violins, string instruments of the violin genus such as viola, cello and contrabass, plucked instruments such as guitar and mandolin, or harpsichord can also reproduce sounds relatively close to the original sound. Furthermore, it was confirmed that violin and piano sonatas can also reproduce sounds close to the original sound. In this example, it was confirmed that if a cello was attached instead of the violin 42, the sound of the piano alone could be reproduced relatively well due to the difference in the frequency components of the instrument sound between the cello and the violin 42.

By the way, in order to reproduce a faithful sound from the body 49 of the violin 42, the material of the rod 21 and the like must be selected so that the mechanical vibration from the cap 12 of the drive coil 11 can be faithfully transmitted to the bridge 45. I have to. Ie rod 21
It is necessary to consider the relations such as elasticity, damping (internal friction), density, transmission speed, and natural frequency.

Considering, for example, the case where the violin 42 is used as a string instrument, a front plate 46 made of pine is used as a raw material.
And, the back plate 47 made of maple has different lowest natural frequencies, and the front plate 46 has a scale in the range of C # to D.
It is a common general wisdom among the makers of the violin 42 that if the back plate 47 can be adjusted in the scale of D to D #, the violin 42 that produces an excellent sound can be produced. 1
C. 98, which was announced on the Japanese language board "Science" M.
In Hutchins'"ViolinAcoustics", the front plate 46
Has a minimum natural frequency of 139 to 148 Hz (C # 3 in the musical scale.
~ D3), the lowest natural frequency of the back plate 47 is 148 ~ 156H
z (D3 to D # 3 in the scale) is disclosed.
From this result, it is preferable that the lowest natural frequency of the rod 21 does not match at least the frequency of 139 to 156 Hz which is the range of the lowest natural frequency of the front plate 46 and the back plate 47 and its integral multiple. . In the present embodiment, the first
When the shortest length from the base end of the rod 22 to the contact portion between the clasped body 26 and the piece 45 is set to 145 mm, and all the materials of the rod 21 are made of aluminum alloy, the body 49 of the violin 42 is Was able to reproduce the most faithful sound.

Further, when the violin 42 is actually played, since the piece 45 is vibrated in the lateral direction, a rod 21 that is also movable laterally along the axis is connected to the piece 45. It is preferable that a damper 9 that restricts the movement of the rod 21 in the vertical direction, that is, the direction perpendicular to the axis of the rod 21, is attached to the cap 12 or the rod 21. This allows
Vibration from an unnecessary direction can be suppressed with respect to the top 45.

Further, the drive coil 11 of this embodiment is actually an existing speaker with the diaphragm removed, and no special structure is required. Therefore, there is no design difficulty in manufacturing the device. Since the quality of the final sound also changes by replacing the violin 42, this device can be effectively used when checking the sound quality of the violin 42. Needless to say, the drive coil 11 does not have to be particularly used as one incorporated in the speaker.

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description of the common parts will be omitted to avoid duplication.

In this embodiment, the rod 21 in the first embodiment is used.
Is an improvement of That is, a rod that is a rod-shaped member
In 21, the base end of a rod body 71 made of an aluminum alloy having a diameter of 6 mm is connected to the center of the cap 12 of the drive coil 11, and the Fernham Buko wood 72 is fitted and bonded to the tip of the rod body 71. The same clasp 26 as that of the first embodiment is connected and fixed to the tip of the wood 72 with screws 25. Further, the shortest length from the base end of the rod 71 to the contact portion between the cladding body 26 and the piece 45 is 145 mm. The other structure is exactly the same as that of the first embodiment.

The Fernham Bucco wood 72 referred to here is a natural wood of Brazil widely known to those skilled in the art as a raw material for a bow support member used when rubbing the strings of a stringed instrument. By configuring a part of the rod 21 with a different kind of wood,
The resonance component of the undesired natural frequency of the metal rod 71 can be effectively absorbed here. Moreover, the Fernham Buko wood 72 is said to be capable of producing the best sound when the strings are rubbed with a bow to produce sound, so in the part of the rod 21 that transmits mechanical vibration to the piece 45,
Using this Fernham Buko wood 72, a beautiful, clear and pure sound, such as when a string is rubbed with a bow attached to the Fernham Buko wood 72, can be faithfully reproduced from the body 49 of the violin 42. Furthermore, since this Fernham Buko wood 72 is used not only as the violin 42 but also as a supporting member for the bow of other string instruments of the violin genus, the same effect can be obtained even when using string instruments other than the violin 42. There are advantages.

In other words, if the rod 21 is constructed by connecting the Felnambuco lumber 72 to the metal rod 71, it is possible to effectively absorb the unwanted resonance component of the rod 71, and as if the Fernham Buco lumber 72 has a bow. You can faithfully reproduce a beautiful, clear and pure sound, such as when you rub a string with it attached.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, it is desirable that the shape of the rod 21, which is a rod-shaped member, be appropriately changed in consideration of the characteristics of the stringed instrument to be applied.

[0031]

According to the player apparatus of the present invention as set forth in claim 1, a drive coil for converting an audio current into a mechanical vibration,
A rod-shaped member whose base end is connected to the vibration part of the drive coil,
It is composed of a stringed instrument of the violin genus in which a piece is connected to the tip of this rod-shaped member, and it is possible to obtain a realistic sensation of directly listening to a live performance with a simple structure.

Further, in the player apparatus according to the present invention as set forth in claim 2, in addition to the structure of claim 1, the rod-shaped member is formed by connecting a Felnambuco lumber to a metal rod body. Is able to effectively absorb the unwanted resonance component of the rod, and moreover, like when rubbing a string with a bow attached to Fernham Buko wood,
Beautiful and clear sound can be faithfully reproduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a player device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1 above.

FIG. 3 is a perspective view of a main part of the same.

FIG. 4 is a circuit diagram showing an electrical configuration of the same.

FIG. 5 is a plan view of an essential part showing a second embodiment of the present invention.

[Explanation of symbols]

 11 Drive coil 12 Cap (vibrating part) 21 Rod (rod-shaped member) 41 Violin (stringed instrument of the violin genus) 45 Pieces 71 Rod 72 Fernham Buko wood

Claims (2)

[Claims] 1. A drive coil for converting a sound current into mechanical vibration, a rod-shaped member having a base end connected to a vibration portion of the drive coil, and a stringed instrument of the violin genus having a piece connected to the tip of the rod-shaped member. A player device characterized by being configured. 2. The player device according to claim 1, wherein the rod-shaped member is configured by connecting a Fernham Buco wood to a metal rod.