JP2008268777A - Musical sound device, and producing method and working method of musical sound device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an abnormal sound from being caused by interposing and not interposing a soft body between a vibration exciter and a soundboard according to the length of one end to the other end of a supporter supporting the vibration exciter. <P>SOLUTION: A soft plate 21 is fitted to the vibration excitation surface of an electromagnetic drive unit (vibration exciter) 37 fitted to the tip of triangular metal fittings 36 (supporter), and not fitted to an electromagnetic drive unit 31 at the tip of L-shaped metal fittings 32. The soft plate 21 has a cushion property and is interposed between the electromagnetic drive unit 37 (31) and soundboard 8. Consequently, vibrations of the soundboard 8 are harder to follow up excitation by the electromagnetic drive unit 37 (31) and easier to lag as the L-shaped metal fittings 32 and triangular metal fittings 36 are longer in length, but the lag is absorbed by the interposed soft plate 21, so that an abnormal resonance sound generated when the soundboard 8 and electromagnetic drive unit 37 (31) collide against each other is not caused. One or both of the triangular metal fittings 36 and L-shape metal fittings 32 are fitted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a musical sound device, and more particularly, to a device that vibrates a soundboard of a musical instrument and generates and emits a sound from the soundboard.

  Conventionally, in order to vibrate such a soundboard (diaphragm), an electromagnetic drive is joined to the piano soundboard, and a musical sound signal is sent to the electromagnetic drive to vibrate the soundboard instead of the electromagnetic drive. The sound is emitted and emitted from this soundboard.

Japanese Utility Model Publication No. 60-150894 JP-A-8-146949 JP-A-8-111896 JP-A-4-156799 JP-A-53-69624 JP-A-4-56996 Japanese Patent Laid-Open No. 5-80748 Japanese Patent Laid-Open No. 5-73039 Japanese Patent Application No. 2006-181135 (unpublished) Japanese Patent Application No. 2006-160054 (unpublished) Japanese Patent Application No. 2006-151287 (unpublished) Japanese Patent Application No. 2006-141954 (unpublished) Japanese Patent Application No. 2006-135899 (unpublished)

  However, when the sound is produced with such a soundboard (vibration plate), the sound is slightly different from the sound of an actual acoustic instrument.

  In order to achieve the above object, the present invention supports the vibrating body at one end and is fixed to the instrument body at the other end, and the force with which the vibrating body is brought into contact with the soundboard is substantially the same. In the support body in which the vibration body is brought into contact with the soundboard, the longer the length from one end of the support body to the other end, the more the flexible body is interposed between the vibration body and the soundboard. The flexible body was not interposed.

  As a result, the longer the length from one end to the other end of the support body, the more difficult it is for the vibration of the soundboard to follow the vibration of the vibration body, but the delay is absorbed by the intervening flexible body. Thus, the abnormal resonance sound generated when the soundboard and the vibrating body collide with each other is not generated.

  In addition, the vibration body receives the reaction of the soundboard to the vibration of the vibration body, but the longer the length from one end of the support body to the other end, the harder the vibration body follows the reaction. Although it becomes easy to delay, this delay is absorbed by the intervening flexible body, and the abnormal resonance sound generated when the soundboard and the vibrating body collide with each other is not generated.

  A plurality of types of support bodies and vibration exciters having different lengths are selected and switched according to the mounting position / space / state of each musical tone device or each keyboard instrument and are attached one by one. However, in some cases, a plurality of types of support bodies and vibration exciters having different lengths may be attached to each musical tone device or each keyboard instrument.

(1) Sound device soundboard 8
1 shows a longitudinal section viewed from the left side of the musical tone device, FIG. 2 shows a longitudinal section viewed from the right side of the musical tone device, FIG. 3 shows a rear surface of the musical tone device, and FIG. 4 shows a front side of the musical tone device. This musical sound device is an example of an acoustic upright piano. A square-shaped frame (post) 1 is assembled in a square frame shape, and a plurality of, for example, three inner columns 2 extending vertically are fixed at substantially equal intervals inside the square frame of the frame (post) 1. Yes.

  A pin plate 3 is fixed to the upper side of the front surfaces of the frame 1 and the inner column 2, and a bottom plate 4 is fixed to the lower side of the front surfaces of the frame 1 and the inner column 2, and the upper surfaces of the frame 1 and the inner column 2. A roof plate 5 is fixed to the left and right side plates of the frame 1 and the inner support 2.

  On the inner side surrounded by the pin plate 3, the bottom plate 4, the left parent plate 6, and the right parent plate 7, a square and flat sound board 8 is attached by wood screws, bolts, adhesive, or the like. The soundboard 8 is a large single plate formed by joining a plurality of wood plates. The grids or grain of each part of these connected wood boards are aligned in substantially the same direction along the longitudinal direction of the wood boards.

  As a result, the sound of the soundboard 8 spreads uniformly throughout the soundboard 8 without being biased to a part of the soundboard 8, and the musical sound emitted from the soundboard 8 is inadvertently mutated, altered, distorted, or reduced in volume. It will not be done. The sound board 8 may be a single board or thin film board cut out of timber, a veneer board, a plywood board, or the like.

  The direction of the sound or grain of the sound board 8 is 20 ° to 70 °, preferably 30 ° to 60 °, more preferably 40 ° to 50 °, for example, substantially 45 ° with respect to the horizontal direction. Yes. The plate surface of the soundboard 8 is along the vertical direction. This sound board 8 is oscillated to emit sound.

  A plurality of sounding rods 9 are attached and fixed to the outer surface of the rear surface (back surface) of the soundboard 8 with wood screws, bolts, adhesives, or the like. The longitudinal direction of the sounding rods 9 is different from the direction of the lattice or the grain of the sounding board 8, and is substantially aligned in a substantially orthogonal direction. Two to thirty, preferably five to twenty, for example ten, of the sounding rods 9 are attached at almost equal intervals.

  The sounding bars 9 may be inclined at 20 to 70 degrees, preferably 30 to 60 degrees, more preferably 40 to 50 degrees with respect to the horizontal direction. As a result, the sound of the soundboard 8 spreads uniformly throughout the horizontal direction and / or the vertical direction, and the musical sound emitted from the soundboard 8 is inadvertently mutated, altered or distorted, and the volume is reduced. Will not be lost. Since the sound board 8 has a rectangular shape, the sound of the sound board 8 has a property of being originally biased in the horizontal direction and / or the vertical direction.

  Each of the sounding bars 9 is arranged in a direction substantially perpendicular to the grid or grain of the sounding board 8 and 40 degrees to 140 degrees, desirably 60 degrees to 120 degrees, more desirably 80 degrees to 100 degrees, for example. Yes. As a result, the sound of the soundboard 8 easily propagates along the mesh or the grain, but the sound is propagated across the mesh or the grain by each sounding bar 9... It spreads uniformly and the musical sound emitted from the sound board 8 is not inadvertently mutated, altered, distorted, or reduced in volume.

  The both ends of the sounding rods 9 reach the end of the sounding board 8. Thereby, it can be achieved to the edge of the sound board 8 that the sound of the sound board 8 is not biased in the horizontal direction and / or the vertical direction, and the musical sound emitted from the sound board 8 is inadvertent. Will not be mutated, altered, distorted, or reduced in volume.

  Both ends of the sounding bar 9 are thin. As a result, the resonance of the soundbar 9 itself is prevented, and the musical sound emitted from the soundboard 8 is not inadvertently mutated, altered, distorted, or reduced in volume.

  The intervals of the sound bars 9 are 10 cm to 30 cm, and may be unequal intervals instead of equal intervals. As a result, the sound bars 9 become vibration nodes, and the sound having the same frequency does not resonate between the sound bars 9. The musical sound emitted from the sound board 8 is inadvertently mutated. It will not be altered, distorted or reduced in volume. Such sounding rods 9 may be attached to the front side other than the rear side of the sounding board 8.

  A metal frame 10 is attached and fixed by a wood screw, a bolt, an adhesive or the like from the front surface of the pin plate 3 to the bottom plate 4 on the front surface of the soundboard 8. A large number of strings (piano lines) 11. A piece 12 is sandwiched between the strings 11 ... and the soundboard 8, and the vibrations of the strings 11 ... are transmitted to the soundboard 8 so that the soundboard 8 vibrates to produce sound. .

  In front of the bottom plate 4 of the musical sound device, a pair of twelve bases 12 and 12 are attached and fixed to the left and right with wood screws, bolts, adhesive, or the like. A pair of shelf support pillars 13 and 13 extending vertically are mounted and fixed on the bases 12 and 12 with wood screws, bolts, adhesives, or the like, and a plate extending horizontally on the shelf support pillars 13 and 13. A shelf 14 is attached and fixed with wood screws, bolts, adhesive, or the like.

  A keyboard 15 is mounted on the front side of the shelf board 14, and an arm 16 is attached and fixed to the interior of the shelf board 14 with wood screws, bolts, an adhesive, or the like. A keyboard lid 17 is attached and fixed by a wood screw, a bolt, an adhesive or the like so as to be openable and closable from the upper front edge of the arm 16 to the upper front edge of the shelf board 14.

  On the inner side surrounded by the front edge of the upper surface of the bottom plate 4, the inner front edge of the left master plate 6, the inner front edge of the right master plate 7, and the lower surface of the shelf board 14, a rectangular and flat lower front plate 18 can be opened and closed and removed. It is attached. On the inner side surrounded by the front edge of the lower surface of the roof plate 5, the inner front edge of the left main plate 6, the inner front edge of the right main plate 7, and the upper upper edge of the keyboard lid 17, a rectangular and flat upper front plate 19 is opened and closed. And it is removably attached.

(2) Attachment structure of electromagnetic drive unit (electromagnetic drive / vibration body) 31, 37 FIG. 5 shows an attachment structure of electromagnetic drive unit (electromagnetic drive / vibration body) 31. An L-shaped metal fitting 32 made of a metal plate is screwed to the left side of the lower surface of the shelf board 14. The L-shaped metal fitting 32 is formed in an “L” shape by bending the center of an elongated metal plate at a right angle, and has a height of about 10 to 30 cm.

  The upper half of the L-shaped bracket 32 is horizontal and is screwed to the lower surface of the shelf board 14. The lower half of the L-shaped metal fitting 32 is vertically oriented and has a hole in the center. A hexagonal bolt 33 is inserted into the hole, and a nut 34 and an adjustment knob 35 are screwed into the bolt 33, and the L-shaped metal fitting 32 can be clamped by the nut 34 and the adjustment knob 35. .

  The tip of the bolt 33 is screwed and fixed in a screw hole at the center of the rear surface of the electromagnetic drive unit 31. In a state where the nut 34 and the adjustment knob 35 are turned to sandwich the L-shaped metal fitting 32, the electromagnetic drive unit 31 is pressed against the soundboard 8 to fix the L-shaped metal fitting 32 to the lower surface of the shelf board 14.

  Thereafter, the nut 3433 and the adjustment knob 35 are turned to press the electromagnetic drive unit 31 against the soundboard 8 with a predetermined force. When the electromagnetic drive unit 31 is vibrated / vibrated by this pressing, there is no momentary gap between the electromagnetic drive unit 31 and the soundboard 8, and the electromagnetic drive unit 31 and the soundboard 8 collide with each other. The vibration / abnormal sound is not generated, and the musical sound emitted from the soundboard 8 is not inadvertently changed, altered, distorted, or reduced in volume.

  FIG. 6 shows a mounting structure of the electromagnetic drive unit (electromagnetic drive body / vibration body) 37. A triangular bracket 36 made of a metal plate is screwed to the right side of the upper surface of the bottom plate 4. The triangular metal fitting 36 is bent in an “L-shape” at a right angle near the center of an elongated metal plate, and an oblique metal plate is screwed so as to bridge both ends of the “L-shape”, thereby forming a “triangle”. The height is about 10 to 120 cm.

  The lower surface corresponding to the short side of the triangular metal fitting 36 is horizontally oriented, is brought into contact with the back surface (rear surface) of the end base 12 and is screwed to the upper surface of the bottom plate 4. The upper end of the triangular bracket 36 is vertically oriented, and a hole is formed in the center. A hexagonal bolt 33 is inserted into the hole, and a nut 34 and an adjustment knob 35 are screwed into the bolt 33, and the triangular bracket 36 can be clamped by the nut 34 and the adjustment knob 35.

  The tip of the bolt 33 is screwed and fixed in a screw hole at the center of the rear surface of the electromagnetic drive unit 37. In a state where the nut 34 and the adjustment knob 35 are turned to sandwich the triangular bracket 36, the electromagnetic drive unit 37 is pressed against the soundboard 8 to fix the triangular bracket 36 to the upper surface of the bottom plate 4.

  Thereafter, the nut 34 and the adjustment knob 35 are turned to press the electromagnetic drive unit 37 against the soundboard 8 with a predetermined force. When the electromagnetic drive unit 37 is vibrated / vibrated by this pressing, there is no momentary gap between the electromagnetic drive unit 37 and the soundboard 8, and the electromagnetic drive unit 37 and the soundboard 8 collide with each other to cause an abnormality. The vibration / abnormal sound is not generated, and the musical sound emitted from the soundboard 8 is not inadvertently changed, altered, distorted, or reduced in volume.

  Such electromagnetic drive units 31, 37 are fastened to the soundboard 8, the bottom plate 4, the roof plate 5, the left main plate 6, the right main plate 7, the lower front plate 18, the upper front plate 19, and the like with wood screws, bolts, or the like. Therefore, it is not necessary to make holes in these, and the acoustic characteristics of the musical sound device including the sound board 8 are not altered.

  In addition, wood screws and bolts are attached to the soundboard 8, the bottom plate 4, the roof plate 5, the left main plate 6, the right main plate 7, the lower front plate 18, the upper front plate 19 and the like, and holes are made in these. The electromagnetic drive units 31 and 37 are not visible at all from the outside of the musical sound device, so that the appearance and aesthetics of the musical sound device are not impaired even if the electromagnetic drive units 31 and 37 are attached.

  The external shape of the electromagnetic drive units 31 and 37 is composed of a cylindrical main body case and a circular flat diaphragm provided on the side surface of the main body case. The electromagnetic drive units 31 and 37 contain a coil and a magnet, and the coil is connected to one of the main body case and the diaphragm, and the magnet is connected to the other.

  When a musical sound signal comprising a plurality of types of musical sounds flows through the coil, the coil or magnet vibrates / drives / displaces due to the interaction between the magnetic field generated in the coil and the magnetic field of the magnet, and the vibration plate vibrates / Drive / displace. The diaphragm is joined (including attachment / connection / adhesion) to the soundboard 8 directly or via a connection member. Therefore, the electromagnetic drive units 31 and 37 convert a musical sound signal composed of a plurality of types of musical sounds into mechanical changes, and drive the soundboard 8 of the musical instrument to emit sound.

  Thereby, the diaphragm and the soundboard 8 can be vibrated by electromagnetic driving. Unlike the speaker, the electromagnetic drive units 31 and 37 do not sound / sound themselves, but electromagnetically drive other joined objects to vibrate and emit sound. Such an electromagnetic drive unit 11 is disclosed in Japanese Patent Laid-Open Nos. 8-146949 and 8-111896.

  Since the lower surface corresponding to the short side of the triangular bracket 36 is in contact with the back surface (rear surface) of the twelve base 12, even if the reaction force of the excitation force / pressure force on the soundboard 8 of the electromagnetic drive unit 37 is large, the triangular bracket 36 is triangular. The metal fitting 36 does not shift forward (to the right in FIG. 6).

  The adjusting knob 35 may be anything that can adjust the clamping force or clamping amount, such as a nut, screw screw, and thumbscrew. Further, the front side of the lower surface of the triangular bracket 36 does not have to be in contact with the back surface (rear surface) of the twelve base 12.

(3) L-shaped bracket 32 and triangular bracket 36 (support) and flexible plate 21 (flexible body)
A flexible plate 21 (flexible body) is adhesive or adhesive tape on the distal end surface / excitation surface of an electromagnetic drive unit (electromagnetic drive body / vibration body) 37 attached to the distal end of the triangular bracket 36 (support body). And is not attached to the electromagnetic drive unit 31 at the tip of the L-shaped metal fitting 32.

  The flexible plate 21 has cushioning properties, elasticity, and flexibility, and is interposed between the electromagnetic drive unit 37 (31) and the soundboard 8. Therefore, the flexible plate 21 is interposed as the length of the L-shaped metal fitting 32 and the triangular metal fitting 36 (support) is longer, and is not interposed as the length is shorter.

  Thereby, as the length from one end to the other end of the L-shaped bracket 32 and the triangular bracket 36 is longer, the vibration of the sound board 8 is less likely to follow the vibration of the electromagnetic drive unit 37 (31), and the delay tends to be delayed. The delay is absorbed by the intervening flexible plate 21, and abnormal sound generated when the soundboard 8 and the electromagnetic drive unit 37 (31) collide with each other is not generated.

  Further, the flexible plate 21 may be made thicker / thinner as the length of the L-shaped bracket 32 and the triangular bracket 36 (support) is longer / shorter. Thereby, the absorption of the delay by the interposed flexible plate 21 is realized continuously / stepwise / steplessly.

  The electromagnetic drive unit 37 (31) is supported at one end of the L-shaped bracket 32 and the triangular bracket 36, and the other end is fixed to the instrument body. The L-shaped bracket 32 and the triangular bracket 36 are connected to the electromagnetic drive unit 37. (31) is brought into contact with the soundboard 8. The lengths from one end to the other end of the L-shaped bracket 32 and the triangular bracket 36 are different for each of the plurality of electromagnetic drive units 37 and 31.

  Moreover, the adjustment amounts of the nut 34 and the adjustment knob 35 are the same in both of the electromagnetic drive units 37 and 31, and the force with which the electromagnetic drive units 37 and 31 are brought into contact with the soundboard 8 is the same. . However, it may be different. The contact force of the electromagnetic drive unit 37 may be greater, or the contact force of the electromagnetic drive unit 31 may be greater. Thereby, the contact force of the electromagnetic drive unit 31 is changed in accordance with the length from one end of the L-shaped bracket 32 and the triangular bracket 36 to the other end.

  For example, the following material is used for the flexible plate 21. The material is chloroprene rubber (DuPont neoprene rubber, Neo-180), hardness A60, tensile strength 7.4 MPa, elongation 290%, compression set 35% (70 ° C. × 22 h). The size is slightly smaller than the contact surface of the electromagnetic drive units 37, 31 with the soundboard 8, and the thickness is a few millimeters to several millimeters, for example, 0.5 mm to 2 mm. , Flexible.

  The force with which the electromagnetic drive units 37 and 31 are brought into contact with the soundboard 8 is the same as the own weight of the electromagnetic drive units 37 and 31, or twice, three times, four times, five times, six times, and seven times the own weight. , 8 times, 9 times, 10 times, tens of times, or larger than tens of times. The weight of the electromagnetic drive units 37 and 31 is several hundred grams, for example, 400 grams to 500 grams.

  Thus, if the force with which the electromagnetic drive units 37 and 31 are brought into contact with the soundboard 8 is larger than the weight of the electromagnetic drive units 37 and 31, the excitation force of the electromagnetic drive units 37 and 31 is reliably ensured. Therefore, the abnormal resonance sound generated when the soundboard 8 and the electromagnetic drive unit 37 (31) collide with each other is not generated.

  The force with which the electromagnetic drive units 37 and 31 are brought into contact with the soundboard 8 is smaller than the pressure applied to the soundboard 8 by the piece 20 in the instrument body. The pressure applied to the sound board 8 by the piece 20 is about several hundred kilograms, for example, 200 kg to 400 kg.

  As described above, when the force with which the electromagnetic drive units 37 and 31 are brought into contact with the soundboard 8 is smaller than the pressure applied to the soundboard 8 of the piece 20 in the instrument body, the vibration / sound of the string 11 is generated by the piece 20. The sound is transmitted to the soundboard 8 through the soundboard 8 without being disturbed, and the vibration / sound due to the strings 11 other than the vibration / sound due to the electromagnetic drive units 37 and 31 is surely sounded / radiated from the soundboard 8 without alteration. Is done.

  The triangular bracket 36 (support) having a long length from one end to the other end is attached to the upper surface of the bottom plate 4 of the keyboard instrument, and the L-shaped bracket 32 (support body) having a short length from the one end to the other end. ) Is attached to the lower surface of the shelf 14 of the keyboard instrument.

  Further, the triangular bracket 36 (support) having a long length from one end to the other end is lifted from below the bottom plate 4 of the keyboard instrument, and an L-shaped bracket 32 (short from the one end to the other end) ( The support is suspended from above the lower surface of the shelf 14 of the keyboard instrument.

  Thereby, the radiation position of the sound from the electromagnetic drive units 31 and 37 can be set to a position close to the keyboard 15 or the shelf board 14, and the keyboard 15 can be played / operated when the keyboard 15 is played / operated. The finger / hand that is playing can feel the radiation / vibration of the sound, and a feeling close to that of an actual performance can be obtained.

  Further, the electromagnetic drive unit 37 at the tip of the triangular bracket 36 and the electromagnetic drive unit 31 at the tip of the L-shaped bracket 32 are arranged between the triangular bracket 36 and the L-shaped bracket 32, the bottom plate 4, the shelf plate 14, By interposing the left master plate 6, the right master plate 7 and the like, vibration / sound of one electromagnetic drive unit 31 (37) is hardly transmitted to the other electromagnetic drive unit 37 (31), and abnormal resonance sound is not generated. The sound quality of the electromagnetic drive units 31 and 37 can be kept high.

(4) Attachment Position of Electromagnetic Drive Units 31 and 37 The electromagnetic drive unit 31 is attached to the left end of the soundboard 8 and immediately below the shelf board 14. The electromagnetic drive unit 37 is attached to the right end of the sound board 8 and at a substantially intermediate position between the shelf board 14 and the bottom board 4.

  As a result, the electromagnetic drive units 31 and 37 are located at positions shifted from the same line along the grid or grain of the sound board 8 and positions shifted from the same line along the longitudinal direction of the sound bars. Attached to the surface of the board.

  Here, the electromagnetic drive unit 37 may be attached to the right end of the soundboard 8 and immediately below the shelf board 14. Even in this case, the electromagnetic drive units 31 and 37 are located at positions shifted from the same line along the grid or grain of the sound board 8 and from positions on the same line along the longitudinal direction of the sound bars. Attached to the surface of the soundboard.

  As a result, the vibration / sound from the electromagnetic drive units 31 and 37 is not biased along a certain line along the grid or grain of the soundboard 8 and is not biased along a part of the soundbar 9. The vibration / sound of the sound is not biased to a part of the soundboard, and is uniformly transmitted to the entire soundboard 8, and the vibration / sound transmission to the soundboard 8 is transmitted to almost every corner of the soundboard 8 at almost the same speed. The entire sound board 8 vibrates / sounds evenly, and the alteration / distortion of the musical sound from the sound board 8 is eliminated.

  In addition, the electromagnetic drive units 31 and 37 are attached to positions as far apart as possible with the substantial center of the soundboard 8 in between. The positions separated from each other as much as possible are the corners / vertices of the soundboard 8. However, even if the four corners / vertices of the sound board 8 are driven, the sound volume of the sound board 8 does not increase.

  In order to increase the volume of the soundboard 8, the electromagnetic drive units 31 and 37 must be attached to the center of the soundboard 8. However, if a plurality of electromagnetic drive units 31 and 37 are mounted close to the center of the soundboard 8, the musical sounds emitted from the soundboard 8 may be inadvertently mutated, altered or distorted due to interference with each other. I will do.

  Therefore, in order to harmonize the both, the electromagnetic drive units 31 and 37 are preferably attached at positions separated as much as possible across the substantial center of the soundboard 8.

  The sound board 8 has a long portion, that is, a longitudinal direction and a short portion, that is, a width direction in directions orthogonal to each other, such as a rectangle and a rhombus, and the electromagnetic drive units 31 and 37 are arranged in this longitudinal direction. Along the left and right edges of the soundboard 8, the soundboard 8 is spaced apart. This prevents the musical sounds emitted from the soundboard 8 from interfering with each other from being inadvertently mutated, altered, distorted, or reduced in volume.

  The electromagnetic drive units 31 and 37 are attached to positions that are substantially symmetrical with respect to the center of the soundboard 8. As a result, there is no imbalance in volume and sound quality in the transmission of each vibration / sound from the electromagnetic drive units 31 and 37 to the soundboard, and each vibration / sound from the electromagnetic drive units 31 and 37 is evenly distributed. Can be transmitted to the soundboard 8.

  Further, the sound board 8 has a line-symmetric shape such as a rectangle, a square, a hexagon, and the like, and the electromagnetic drive units 31 and 37 are attached at positions substantially on the axis of the line symmetry. Thereby, each vibration / sound from the electromagnetic drive units 31 and 37 is efficiently transmitted to the center of gravity / center of the soundboard 8, and the sound volume of the soundboard 8 is not reduced.

  Further, the electromagnetic drive units 31 and 37 are attached at substantially the same height from the bottom surface of the musical sound device, that is, the bottom plate 4. As a result, the vibrations / sounds from the electromagnetic drive units 31 and 37 are reflected on the floor surface and the bottom plate 4, and the sound field / sound atmosphere that is generated is not unbalanced. / Each sound is emitted equally from left to right.

  In practice, the electromagnetic drive units 31 and 37 are attached at positions slightly deviated from the center, center line or symmetrical axis of the sound board 8. Thereby, the sound from the electromagnetic drive units 31 and 37 is radiated strongly downward from above, and the performer can feel the sound from below.

  Of course, the electromagnetic drive units 31 and 37 may be attached at positions slightly shifted from the center, the center line, or the symmetrical axis of the sound board 8. Thereby, the sound from the electromagnetic drive units 31 and 37 is radiated | emitted strongly toward the upper direction from the downward direction, and a player can feel a sound from the top.

  Further, the electromagnetic drive units 31 and 37 are attached to the inside of the musical sound device in the sound board 8, and the sounding bars 9 are attached to the outer side of the musical sound device in the sound board. Therefore, the electromagnetic drive units 31 and 37 can be prevented from hitting the sounding rods 9. Moreover, the electromagnetic drive units 31 and 37 can be hidden from the outside of the musical sound device, and the appearance is not impaired.

  Moreover, the electromagnetic drive units 31 and 37 can be attached at positions corresponding to the sounding bars 9 without contacting the sounding bars 9. This is the case where the electromagnetic drive units 31 and 37 are mounted at positions that are as far apart as possible from each other, with the center of the soundboard 8 being sandwiched between them, and at positions that are as far as possible from each other across the center of the soundboard 8. For example, even if the mounting positions of the electromagnetic drive units 31 and 37 overlap the positions of the sounding rods 9..., The sound quality can be maintained and the effect of not causing imbalance can be maintained. Further, the size of the electromagnetic drive units 31 and 37 can be made larger than the interval between the sounding bars 9.

  FIG. 8 shows an embodiment in which only one of the electromagnetic drive units 31 and 37, for example, the electromagnetic drive unit 31 is attached to the soundboard 8. In this embodiment, the sound board 8 is attached to a position near the edge of the sound board 8 on the substantially symmetrical axis E of the sound board 8. Only the electromagnetic drive unit 37 may be attached to the soundboard 8.

  The direction P along the grain or grain of the soundboard 8 is substantially equiangular from the axis E and the edge direction AB of the soundboard 8. Further, the direction S along each longitudinal direction of each sounding bar 9 is substantially equiangular from the axis E and the edge direction AB of the sounding board 8. The electromagnetic drive unit 31 is attached to the surface of the soundboard 8 at such a position.

  With such an equiangular position, the vibration / sound from the electromagnetic drive unit 31 does not deviate along a certain line along the grid or grain of the sound board 8 and does not deviate along a part of the sound bar 9. The vibration / sound of the soundboard 8 is not biased to a part of the soundboard, and is uniformly transmitted to the entire soundboard 8, and the vibration / sound transmission to the soundboard 8 is almost the same throughout the soundboard 8. The sound board 8 is transmitted at a speed, and the entire sound board 8 vibrates / sounds evenly, and the alteration / distortion of the sound from the sound board 8 is eliminated.

  In FIG. 8, the intersection of the axial direction E, the edge direction AB of the soundboard, the direction P along the grid or grain of the soundboard 8, and the direction S along each longitudinal direction of each soundbar 9 are electromagnetically driven. Although it has shifted | deviated from the center of the unit 31, it is for making it easy to see drawing, and even if it moves to the center of the electromagnetic drive unit 31, it is the same.

  The electromagnetic drive unit 31 may be positioned at the center of the soundboard 8, but the sound quality of the soundboard 8 is improved at a position shifted from the center as described above. This is because the drum quality is hit for the same reason that the sound quality is better when the position shifted from the center to the edge is hit. However, if it deviates from the center, vibrations / sounds are not transmitted uniformly to the entire periphery of the soundboard 8. Therefore, if it is attached at the position as described above, vibration / sound is uniformly transmitted to the entire soundboard 8.

  In FIG. 8, the electromagnetic drive unit 31 is located slightly below the axis E of line symmetry of the soundboard 8. Thereby, it is possible to obtain a performance feel that sounds are transmitted from the lower side of the musical sound device to the floor.

  The electromagnetic drive unit 31 is attached at a position substantially equidistant from each portion of the piece 20 on which the plurality of strings 11 of the musical sound device are laid. As a result, vibration / sound from the electromagnetic drive unit 31 is uniformly transmitted to each string 11 through the piece 20 and is not biased to some strings 11. Harmony with resonance can be achieved.

  In this case, the pieces 20 that are equidistant from the electromagnetic drive unit 31 are not limited to all the pieces 20, but only the low strings 11 ... and the medium strings 11 ... as shown in FIGS. It is done. This is because the difference in length from the electromagnetic drive unit 31 hardly appears because the wavelength of the high sound is short.

  However, if the electromagnetic drive unit 37 is also attached in addition to the electromagnetic drive unit 31, the high-pitched strings 11... Are located at almost equal distances from the respective parts of the piece 20 on which the strings 11. Attached to.

  Therefore, if the electromagnetic drive unit 31 mainly outputs low or medium sounds, and the electromagnetic drive unit 37 outputs mainly high sounds, the electromagnetic drive units 31 and 37 in all sound ranges / frequency bands from low to high. From the electromagnetic drive units 31 and 37 to the respective strings 11 through the piece 20 and uniformly transmitted to the respective strings 11... The vibration / sound by the electromagnetic drive units 31 and 37 and the resonance of the strings 11 can be harmonized. The above holds true for the case where only the other electromagnetic drive unit 37 is attached alone to the musical sound device.

(5) Drive Circuit FIG. 7 shows a drive circuit (musical sound control circuit) for the electromagnetic drive units 31 and 37. The panpot circuit 41 outputs a plurality of left and right channel musical sound signals for forming an analog sound image converted from digital.

  The left musical tone signal L from the panpot circuit 41 is filter-controlled by the left DSP filter 42L, the frequency characteristic is flattened by the left four-band equalizer 43L, and the phase of the musical tone signal L is changed by the left phase control circuit 44L. Amplified by the left amplifier 45L, sent to the left electromagnetic drive unit 31, and outputted from the soundboard 8.

  The right musical tone signal R from the panpot circuit 41 is filter-controlled by the left DSP filter 42R, the frequency characteristic is flattened by the right four-band equalizer 43R, and the phase of the musical tone signal R is changed by the right phase control circuit 44R. Amplified by the right amplifier 45R and sent to the electromagnetic drive unit 37 on the right side, the sound is output from the soundboard 8.

  The left phase control circuit 44L and the right phase control circuit 44R are fed with phase control data for determining the amount of change in the phase of the musical sound signals R and L. Such phase control data includes musical factor data of the musical sound signals L and R, musical factor data sent from outside through a MIDI circuit, and musical factor data empty conversion input from the operation panel of the musical sound device. Is done.

  The value of this phase control data is different for the left and right music signals L and R. Thereby, the phases of the musical sound signals sent to the electromagnetic drive units 31 and 37 are different from each other, and musical sounds having different phases at the left and right portions of the soundboard 8 can be emitted to form stereophonic sounds. The state of this stereo sound can be changed according to the musical factor.

  As described above, the electromagnetic drive units 31 and 37 are attached as far as possible from each other across the center of the soundboard 8, so that the phases of the musical sound signals of the electromagnetic drive units 31 and 37 are shifted. However, they do not cancel each other or distort the sound quality.

  The value of the phase control data may be the same for the left and right music signals L and R. As a result, the phases of the tone signals sent to the electromagnetic drive units 31 and 37 are the same, and the tone signals from both the electromagnetic drive units 31 and 37 are strengthened with each other, so that the sound signal does not increase. The volume of the board 8 can be increased. In this case, both electromagnetic drive units 31 and 37 can be brought close to each other, or close to the center of the soundboard 8.

  Therefore, the difference between the values of the phase control data of the two musical sound signals L and R may be increased as the distance between the electromagnetic drive units 31 and 37 increases. As a result, the phase difference between the musical sound signals L and R sent to both electromagnetic drive units 31 and 37 increases as the separation distance between the plurality of electromagnetic drive units 31 and 37 increases, and the sound volume is increased synergistically. The state can be changed step by step from the state to the state where stereo sound is formed.

  The left DSP filter 42L and the right DSP filter 42R control the frequency characteristics. For example, the left DSP filter 42L is a low pass and the right DSP filter 42R is a high pass, or the left DSP filter 42L and the right DSP filter 42R are cut off. Different frequencies may be used to pass more bass from the right DSP filter 42R. As a result, the lower side of the sound board 8 is on the right side, and more bass is output from the bass side of the keyboard. In this way, it is possible to achieve a sound that is closer to that of an actual acoustic keyboard instrument.

  In other words, in an acoustic instrument such as an actual piano, the vibration of the sound being generated is directly transmitted to the keyboard itself being operated. This transmission vibration is transmitted to the bass key when the keyboard is in the low frequency range, and when the keyboard is operated at the high frequency range, the treble vibration is applied to the key in the high frequency range. If you are operating the midrange of the keyboard, the midrange vibration will be transmitted to the midrange key. The same applies to stringed instruments, wind instruments, and percussion instruments. This musical sound device can provide such a live performance feeling of an acoustic instrument.

(6) Other Embodiments The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the triangular bracket 36 (support) and the L-shaped bracket 32 (support) are not only the bottom plate 4 and the shelf plate 14, but also the pin plate 3, the left master plate 6, the right master plate 7, the lower front plate 18, the upper plate It may be attached inside or outside the front plate 19 or the like.

  The number of the metal fittings 36 and 32 (supports) and the number of the electromagnetic drive units 31 and 37 (vibration bodies) may be three or more, and the length of each of the metal fittings 36 and 32 (supports) is short. There may be a variety of different lengths from one to the long. In this case, the thickness of the flexible plate 21 increases as the metal fittings 36, 32 (support) become longer, and the thickness of the flexible plate 21 decreases as the metal fittings 36, 32 (support) becomes shorter. Or disappear.

  Electromagnetic drive units (electromagnetic drive / vibration bodies) 31 and 37 are located at the center of the sound board 8 on the right center and left center, upper center and lower center, upper right corner and lower left corner, lower right corner and upper left corner, and center. It may be attached in the vicinity.

  Three or more electromagnetic drive units 31 and 37 may be attached to the soundboard 8, and the number of soundboards 8 may be plural. In this case, they are attached to the right center, left center, upper center, and lower center, or to the upper right corner, lower left corner, lower right corner, and upper left corner.

  The electromagnetic drive units 31 and 37 and the soundboard 8 may be provided on the upper surface, front surface, left side surface or right side surface of the musical sound device, or may be replaced by a tweeter or a speaker. The electromagnetic drive units 31 and 37 may be supplied with the same musical tone signal and a monaural signal, or the electromagnetic driving units 31 and 37 may be singular, and the musical tone signal to be sent may be a monaural signal.

  The electromagnetic drive units 31 and 37 are arranged in the vicinity of the center of each long side of the rectangular sound board 8 or the vicinity of the short side of the rectangular sound board 8 in the vicinity of the vicinity of the center of the long side edge. It may be provided near the center of the edge or near the center of the short edge. Even in this case, the soundboard 8 is provided at a position in the vicinity of the edge of the soundboard 8 on the substantially symmetric axis of the soundboard 8.

  The electromagnetic drive units 31 and 37 may be attached not only near the center of each side of the soundboard 8 but also near the corner / corner. In this case, the sound volume may decrease, but the possibility of mutual interference between the electromagnetic drive units 31 and 37 is reduced. The electromagnetic drive units 31 and 37 may be separated along the width direction of the soundboard 8 and attached near the edge of the soundboard 8. In this case, the possibility of mutual interference between the electromagnetic drive units 31 and 37 increases, but the volume increases.

  The electromagnetic drive units 31 and 37 are attached to positions that are substantially symmetric with respect to the center of the soundboard 8, but may be attached to asymmetric positions. In this case, the distances from the center of the soundboard 8 to the electromagnetic drive units 31 and 37 are different. The electromagnetic drive units 31 and 37 may be attached at different heights from the bottom surface of the musical sound device. Thereby, one vibration / sound of the plurality of electromagnetic drive units 31 and 37 can be transmitted from the floor, and the other vibration / sound can be transmitted near the top or the center of the musical sound device.

  The electromagnetic drive units 31 and 37 are attached to the inner side of the lower front plate 18, but one or both of them may be attached to the inner side of the upper front plate 19. Mounting is easier when the inner side is one of the lower front plate 18 and the upper front plate 19.

  In addition to the soundboard 8, the electromagnetic drive units 31 and 37 may be attached to the bottom plate 4, the roof plate 5, the left main plate 6, the right main plate 7, the lower front plate 18, the upper front plate 19, and the like. The electromagnetic drive units 31 and 37 may be attached to the outside / outside surface of the soundboard 8 instead of the inside / inside surface of the soundboard 8.

  The musical sound signals L and R sent to the electromagnetic drive units 31 and 37 are at the same level, but may be at different levels. Thereby, the stereo sound formed by the electromagnetic drive units 31 and 37 is more emphasized.

  A part or all of the sound bars 9 of the sound board 8 may be omitted. The cross-sectional shape of the sounding board 9 of the sounding board 8 may be any shape as long as it is long, such as a square, a triangle, a polygon, a circle, an ellipse, a semicircle, a kamaboko, a fan, or a shape other than a line-symmetric shape. Good. The ends of the sounding bar 9 are thin, but the thickness of the sounding bar 9 may be uniform, the thin thick ones are alternately replaced, the center is thinned or thickened, the ends are thickened and thinned It may be curved or straight.

  The sound bars 9 may be attached at equal intervals, may be attached at unequal intervals, may be attached vertically / vertically, or may be attached horizontally / sideways. However, these may be mixed. The sounding bars 9 may be attached not to the outer surface / rear surface / rear surface of the sounding board 8, but also to the inner surface / front surface / front surface, or may be attached to both surfaces. In this case, the soundboard 8 is attached so as to cross the grid of the soundboard 8 in the vertical direction or obliquely.

  Each interval between the sounding bars 9 may be smaller than the diameter of the electromagnetic drive units 31 and 37. In this case, the electromagnetic drive units 31 and 37 are not positioned between the sounding rods 9. The electromagnetic drive units 31 and 37 may be attached to the center of the soundboard 8. The intervals between the sounding bars 9 may gradually become wider or gradually become narrower as the low-pitched musical tone in the keyboard 22 approaches the output instruction side. The sound bars 9 are parallel to each other, but some or all of them may not be parallel.

  The main body of the musical sound device (the bottom plate 4, the roof plate 5, the left main plate 6, the right main plate 7, the soundboard 8, the lower front plate 18, and the upper front plate 19) was a box shape, but an octahedron, a dodecahedron. Any shape such as a cylinder, a column, a taper, a trumpet, a sphere, or a curved solid may be used. The shape of the soundboard 8 may be any shape other than a square as long as it is flat, such as a circle, a polygon, and a ring.

  The soundboard 8 is flat, but may be curved in a concave shape or may be curved in a convex shape. Thereby, the waveform of the musical sound generated from the sound board 8 is not a plane wave but a spherical wave. The electromagnetic drive units (electromagnetic drive bodies) 31 and 37 may be replaced with speakers, tweeters, or the like.

  In addition to the upright piano, the musical instrument to which the apparatus of the present invention is attached may be any musical instrument as long as it has a keyboard such as a grand piano, electronic piano, electronic organ, harpsichord, electronic harpsichord, keyboard harmonica, electronic keyboard harmonica, It may be a stringed instrument or an instrument other than a keyboard instrument. In this case, since the soundboard 8 is arranged in a substantially horizontal / substantially horizontal direction instead of a substantially vertical / substantially vertical direction, the electromagnetic drive units 31 and 37 are also mounted in a substantially horizontal / horizontal direction. Some or all of the sounding bars 9 can be omitted.

  Further, the musical tone signal composed of plural types of musical sounds is composed of plural types of musical instruments, timbres, tone pitches and / or touch musical tone signals, and is a musical tone signal that is polyphonically generated. Contains musical sounds in each frequency band, treble. Such musical tone signals include musical tone signals for the strings of the musical instruments themselves, pipes and striking parts, as well as musical tone signals for the soundboard 8 part. Only a musical tone signal may be used, or only a musical tone signal on the sound board 8 portion of an actual acoustic instrument may be used, and the musical tone signal composed of the plurality of types of musical tone may be a digital signal such as a PCM.

  Since the electromagnetic drive units 31 and 37 are mounted at positions shifted from the center of the soundboard 8, the vibration of the soundboard 8 will not resonate and the musical sound emitted from the soundboard 8 will be inadvertent. It won't be mutated, altered, distorted, or reduced in volume, making it closer to the sound of an actual acoustic instrument.

  The electromagnetic drive units 31 and 37 may be attached between the sound bars 9. Thereby, after the sound board 8 is vibrated by the electromagnetic drive units 31 and 37, the vibration of the sound board 8 is transmitted to the entire sound board 8 through the sound bars 9. Thus, no sound is transmitted to the sound board 8 and the sound can be transmitted uniformly to the entire soundboard 8.

  The intervals of the sound bars 9 are 10 cm to 30 cm, and may be unequal intervals instead of equal intervals. As a result, the sound bars 9 become vibration nodes, and the sound having the same frequency does not resonate between the sound bars 9. The musical sound emitted from the sound board 8 is inadvertently mutated. It will not be altered, distorted or reduced in volume. Such sounding rods 9 may be attached to the front side other than the rear side of the sounding board 8.

  The intervals between the sounding bars 9 may be non-uniform. As a result, there is no difference in the height of the musical sound emitted from the sound board 8 at each interval of the sound sticks 9, so that the vibration of the sound board 8 does not resonate. Will not inadvertently change or reduce the volume, making it closer to the sound of an actual acoustic instrument.

  The musical sound signals sent to the electromagnetic drive units 31 and 37 have the same magnitude / level / volume or frequency band, but one may be larger than the other, and one may be in the high range and the other in the low range. Good. Thereby, the volume distribution of the soundboard 8 can be partially changed, and the frequency band distribution of the soundboard 8 can also be partially changed.

(7) Effects of other inventions [1] A soundboard of a flat musical instrument that oscillates and emits sound, and a soundboard or grain of each part of the soundboard is aligned in substantially the same direction; A plurality of sounding rods attached to the surface of the sounding board, wherein each sounding rod has a longitudinal direction substantially aligned with a direction different from the direction of the lattice or the grain of the sounding board. This exciter is used to convert a musical sound signal composed of a plurality of types of musical sound into a mechanical change and drive the sound board of the musical instrument to emit sound from the sound board. In the support body which is fixed to the musical instrument main body at one end and the force with which the vibration body abuts on the soundboard is substantially the same, and the vibration body is brought into contact with the soundboard. The longer the length from one end to the other end of the support is, the more flexible the flexible body is between the vibrating body and the soundboard. Zaisa is, the method or processing method of producing musical sound apparatus characterized by not shorter the flexible body intervening.

[2] A soundboard of a flat musical instrument that oscillates and emits sound, and a soundboard or grain of each part of the soundboard that is aligned in substantially the same direction, and a plurality of soundboards attached to the surface of the soundboard A plurality of sounding rods whose longitudinal direction is substantially aligned with a direction different from the direction of the lattice or the grain of the sounding plate, and a musical sound signal composed of a plurality of types of musical sounds. A plurality of vibrators that drive the soundboard of the instrument to emit sound from the soundboard, and support the vibrator at one end, and are fixed to the instrument body at the other end. The force with which the vibrating body comes into contact with the soundboard is substantially the same, and the length of the support body from one end to the other end of the support body that makes the vibration body contact with the soundboard is long. As a matter of course, a flexible body is interposed between the vibrating body and the soundboard, and a shorter length means that the flexible body is not interposed. Musical tone apparatus according to claim.

[3] The musical sound device according to [2], wherein the flexible body becomes thicker as the length from one end to the other end of the support becomes longer. Here, the longer the length from one end of the support body to the other end, the more difficult it is for the vibration of the soundboard to follow the vibration of the vibration exciter, but the delay tends to be absorbed by the intervening flexible plate. Thus, the abnormal resonance sound generated when the soundboard and the vibrating body collide with each other is not generated. Therefore, absorption of this delay by the intervening flexible plate is realized continuously / stepwise / steplessly.

[4] The force with which the vibrating body is brought into contact with the soundboard is the weight of the vibrating body, 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, 9 times, 4. The musical sound device according to claim 2, wherein the musical sound device is larger than ten times, ten times times, or several times times larger than a pressure applied to the soundboard by a piece in the instrument body. As a result, when the force with which the vibrating body abuts on the sounding board is larger than the weight of the vibrating body, the vibrating force of the vibrating body is reliably transmitted to the sounding board, and the sounding board and the vibrating body are mutually connected. Abnormal resonance generated by collision will not occur. In addition, if the force with which the vibrating body comes into contact with the soundboard is smaller than the pressure applied to the soundboard of the piece in the instrument body, the vibration / sound of the string is prevented from being transmitted to the soundboard through the piece, causing trouble. In addition to the vibrations / sounds generated by the vibrating body, the vibrations / sounds generated by the strings are reliably sounded / radiated from the soundboard without being altered.

[5] The support having a long length from one end to the other end is attached to the upper surface of the bottom plate of the keyboard instrument, and the support having a short length from the one end to the other end is the bottom surface of the shelf of the keyboard instrument. The musical sound device according to claim 2, 3, or 4, wherein the musical sound device is attached to the musical instrument. As a result, the sound radiation position from the vibrating body can be made close to the keyboard or shelf, and the finger / hand playing / operating the keyboard can feel the sound radiation / vibration, A feeling close to that of an actual performance can be obtained. In addition, the support, bottom plate, shelf plate, left main plate, right main plate, and the like are interposed between the vibration bodies of the respective supports, and the vibration / sound of one vibration body is the other vibration body. Therefore, abnormal resonance noise is not generated, and the sound quality of the vibrating body can be kept high.

[6] The musical sound device according to [2], [3], [5] or [5], wherein a part of the plurality of vibrators is suspended from above and the other part is lifted from below. As a result, the sound radiation position from the vibrating body can be made close to the keyboard or shelf, and the finger / hand playing / operating the keyboard can feel the sound radiation / vibration, A feeling close to that of an actual performance can be obtained. In addition, the support, bottom plate, shelf plate, left main plate, right main plate, and the like are interposed between the vibration bodies of the respective supports, and the vibration / sound of one vibration body is the other vibration body. Therefore, abnormal resonance noise is not generated, and the sound quality of the vibrating body can be kept high.

[7] The plurality of vibrating bodies may be spaced apart along the longitudinal direction of the soundboard and attached to the vicinity of the edge of the soundboard. The musical sound device described. As a result, a plurality of vibrators approach each other and vibrations / sounds from the plurality of vibrators interfere with each other, so that the musical sound emitted from the soundboard is inadvertently mutated, altered or distorted, and the volume is reduced. Will not be lost.

[8] The musical sound device according to [2], [3], [4], [6] or [7], wherein the plurality of vibrating bodies are attached at substantially the same height from the bottom surface of the musical sound device. As a result, each vibration / sound from the vibrating body is reflected on the floor and the bottom plate of the musical sound device, so that there is no unbalance in the sound field / sound atmosphere, and each vibration / sound from the vibrating body is not It is emitted evenly on the left and right.

[9] The soundboard has a line-symmetric shape, and the vibrating body is attached at a position substantially on the axis of the line symmetry. 6. The musical tone device according to 6, 7 or 8. Thereby, each vibration / each sound from the vibrating body is efficiently transmitted to the center of gravity / center of the soundboard, and the sound volume of the soundboard is not reduced.

[11] A sound board of a flat musical instrument that emits sound when vibrated, and has a line-symmetric sound board in which the meshes or wood grain of each part of the sound board are aligned in the same direction, and the sound board surface To a musical sound device comprising a plurality of sounding rods to be attached, each sounding rod having a longitudinal direction substantially aligned with a direction different from the direction of the lattice or the grain of the sounding board. A vibration body that converts a musical sound signal composed of a plurality of types of musical sounds into a mechanical change and drives the soundboard of the musical instrument to radiate sound from the sounding board is substantially the axis of symmetry of the soundboard. A position near the edge of the soundboard on the line, and the direction along the grid or grain of the soundboard is almost equiangular from the direction of the axis and the edge of the soundboard. The direction along each longitudinal direction of the bar is such that the axis and the direction of the edge of the soundboard are almost equiangular. Production method or processing method of a tone and wherein the attachment to the surface of the soundboard.

[12] A sound board of a flat plate-like musical instrument that emits sound by being vibrated, with a line-symmetric sound board in which each section of the sound board is aligned in substantially the same direction, and on the surface of the sound board A plurality of sounding rods to be mounted, wherein each sounding rod has a longitudinal direction that is substantially aligned with a direction different from the direction of the soundboard or grain of the sounding plate, and a musical sound comprising a plurality of types of musical sounds A vibrating body that converts a signal into a mechanical change and drives the soundboard of the musical instrument to radiate sound from the soundboard, the edge of the soundboard being substantially symmetric about the axis of the soundboard The direction along the grid or grain of the soundboard is substantially equiangular from the axis and the edge of the soundboard, and the direction along each longitudinal direction of each soundbar Is attached to the surface of the soundboard at a position that is almost equiangular from the axis and the edge of the soundboard. Tone device being characterized in that a body.

[13] The musical sound device according to [12], wherein the vibration exciter is attached at a position substantially equidistant from each portion of the piece on which a plurality of strings of the musical sound device are mounted. Thereby, the vibration / sound from the vibrating body is uniformly transmitted to each string through the piece, and is not biased to a part of the strings, so that the vibration / sound by the vibrating body and the resonance of the string can be harmonized. .

[14] A soundboard of a flat musical instrument that oscillates and radiates sound, and a soundboard or grain of each part of the soundboard aligned in substantially the same direction, and a plurality of soundboards attached to the surface of the soundboard A plurality of sounding bars each having a longitudinal direction of each sounding bar substantially aligned in a direction different from the direction of the mesh or grain of the sounding board. A plurality of vibrators that convert a musical sound signal composed of various musical sounds into a mechanical change and drive the soundboard of the musical instrument to emit sound from the soundboard, along the grid or grain of the soundboard. A production method or a processing method of a musical sound device, characterized by being attached to the surface of a sound board at a position shifted from the same line and at a position shifted from the same line along each longitudinal direction of each of the sounding bars.

[15] A soundboard of a flat musical instrument that emits sound by being vibrated, and a soundboard or grain of each part of the soundboard is aligned in the same direction, and a plurality of soundboards attached to the surface of the soundboard A plurality of sounding rods whose longitudinal direction is substantially aligned with a direction different from the direction of the lattice or the grain of the sounding plate, and a musical sound signal composed of a plurality of types of musical sounds. A plurality of vibrators for driving the sound board of the musical instrument to emit sound from the sound board, wherein the position is shifted from the same line along the grid or grain of the sound board, and A musical sound device comprising: a plurality of vibrators attached to the surface of the sound board at a position shifted from the same line along each longitudinal direction of each sound bar.

[16] The musical sound device according to [15], wherein the plurality of vibrators are spaced apart along the longitudinal direction of the soundboard and are mounted near the edge of the soundboard. As a result, a plurality of vibrators approach each other and vibrations / sounds from the plurality of vibrators interfere with each other, so that the musical sound emitted from the soundboard is inadvertently mutated, altered or distorted, and the volume is reduced. Will not be lost.

[17] The musical sound device according to [15] or [16], wherein the plurality of vibration exciters are mounted at positions separated from each other as much as possible across the substantial center of the soundboard. As a result, a plurality of vibrators approach each other and vibrations / sounds from the plurality of vibrators interfere with each other, so that the musical sound emitted from the soundboard is inadvertently mutated, altered or distorted, and the volume is reduced. Will not be lost.

[18] The musical sound device according to claim 15, 16 or 17, wherein the vibration exciter is attached to a position substantially symmetrical with respect to the center of the soundboard. As a result, there is no unbalance in volume and sound quality in the transmission of each vibration / sound from the vibrating body to the sounding board, and each vibration / sound from the vibrating body is evenly transmitted to the sounding board 8. Can do.

[19] The musical sound device according to [5], [6], [7] or [8], wherein the plurality of vibration exciters are attached at substantially the same height from the bottom surface of the musical sound device. As a result, each vibration / sound from the vibrating body is reflected on the floor and the bottom plate of the musical sound device, so that there is no unbalance in the sound field / sound atmosphere, and each vibration / sound from the vibrating body is not It is emitted evenly on the left and right.

[20] The soundboard has a line-symmetric shape, and the vibrating body is mounted at a position substantially on the axis of the line symmetry. Or the musical tone apparatus of 19. Thereby, each vibration / each sound from the vibrating body is efficiently transmitted to the center of gravity / center of the soundboard, and the sound volume of the soundboard is not reduced.

[21] The above-mentioned vibration body is attached to the inside of the musical sound device in the soundboard, and the sounding rod is attached to the outside of the musical sound device in the soundboard. , 17, 18, 19 or 20. Thereby, it can prevent that a vibrating body hits a sounding stick. In addition, the vibrating body can be hidden from the outside of the musical sound device, and the appearance is not impaired. In addition, the vibrating body can be attached to a position corresponding to the sounding bar without contacting the sounding bar.

[22] The musical tone device according to claim 12, 15, 16, 17, 18, 19, 20, or 21, wherein the phases of the musical tone signals sent to the plurality of vibrators are different from each other. Thereby, a sound with a different phase can be emitted by one soundboard, and stereo sound can be formed. Moreover, since the sound from the soundboard is a plane wave, the range in which a sound image can be formed can be widened instead of a single point.

[23] The musical tone according to claim 12, 15, 16, 17, 18, 19, 20, 21 or 22, wherein the phases of the musical tone signals sent to the plurality of vibrators are the same. apparatus. Thereby, the sound from the soundboard strengthens and becomes louder.

[24] 12, 15, 16, 17, 18 characterized in that the phase difference of each of the musical sound signals sent to the plurality of vibrators increases as the distance between the plurality of vibrators increases. , 19, 20, 21, 22, or 23. Thereby, it can change in steps from the state which increases a sound volume synergistically to the state which forms a stereophonic sound.

  Depending on the length from one end to the other end of the support body that supports the vibration body, a flexible body is not interposed between the vibration body and the soundboard, and abnormal noise is prevented. The longer the length from one end to the other end of the support that supports the vibrating body is, the more flexible body is interposed between the vibrating body and the soundboard, and the shorter, the less flexible body is interposed. Thereby, the abnormal sound between a soundboard and a vibration body is prevented.

  The flexible plate 21 is attached to the excitation surface of the electromagnetic drive unit (vibration body) 37 attached to the tip of the triangular fitting 36 (support), and attached to the electromagnetic drive unit 31 at the tip of the L-shaped fitting 32. I can't. The flexible plate 21 has cushioning properties and is interposed between the electromagnetic drive unit 37 (31) and the soundboard 8.

  Thereby, as the length of the L-shaped metal fitting 32 and the triangular metal fitting 36 is longer, the vibration of the sounding board 8 is less likely to follow the vibration of the electromagnetic drive unit 37 (31), but is more likely to be delayed. This delay is absorbed by 21 and no abnormal resonance sound is produced by the sound board 8 and the electromagnetic drive unit 37 (31) colliding with each other. Either one or both of the triangular bracket 36 and the L-shaped bracket 32 are attached.

  The direction of the soundboard's grid is equiangular from the line symmetry axis of the soundboard and the soundboard's edge, and the direction of each soundbar is equiangular from this axis and the soundboard's edge A vibration body is attached to the vibration body, and vibration / sound from the vibration body is not biased along the grid of the soundboard and a part of the soundbar.

  The electromagnetic drive unit 31 is attached to a position in the vicinity of the edge of the soundboard 8 on the substantially symmetrical axis A of the soundboard 8. The grid direction P of the soundboard 8 is substantially equiangular from the axis E and the edge direction AB of the soundboard 8. The direction S of each sounding bar 9 is substantially equiangular from this axis E and the direction AB of the edge of the sounding board 8.

  With such an equiangular position, the vibration / sound from the electromagnetic drive unit 31 is not biased along the grid of the soundboard 8 and is not biased along a part of the soundbar 9. However, the sound is uniformly transmitted to the entire sound board 8 without being biased to a part of the sound board, and the alteration / distortion of the musical sound from the sound board 8 is eliminated.

  A vibrating body is attached to the surface of the soundboard at a position shifted from the same line along the longitudinal direction of the soundboard and the sounding rod, and vibration / sound from the sounding body is Unbiased along part. The left electromagnetic drive unit 31 is attached to the left end (right end in FIG. 3) of the soundboard 8 and immediately below the shelf board 14. The right electromagnetic drive unit 37 is attached to the right end (left end in FIG. 3) of the soundboard 8 and at a substantially intermediate position between the shelf plate 14 and the bottom plate 4.

  The electromagnetic drive units 31 and 37 are separated along the longitudinal direction of the soundboard 8 and are attached near the left and right edges of the soundboard 8. This prevents the musical sounds emitted from the soundboard 8 from interfering with each other from being inadvertently mutated, altered, distorted, or reduced in volume.

The longitudinal cross section seen from the left of a musical sound apparatus is shown. A longitudinal section viewed from the right side of the musical sound device is shown. The back of a musical tone apparatus is shown. The front of a musical sound apparatus is shown. The attachment structure of the electromagnetic drive unit (electromagnetic drive body / vibration body) 31 is shown. The attachment structure of the electromagnetic drive unit (electromagnetic driver / vibrator) 37 is shown. The drive circuit (musical sound control circuit) of the electromagnetic drive units 31 and 37 is shown. The attachment position of the electromagnetic drive unit (electromagnetic driver / vibrator) 31 is shown.

Explanation of symbols

1 ... frame (support), 2 ... inner support,
3 ... pin plate, 4 ... bottom plate,
5 ... Roof plate, 6 ... Left parent plate,
7 ... Right parent plate, 8 ... Soundboard,
9 ... Sound stick, 10 ... Frame,
11 ... strings (piano line), 12 ... wife base,
13 ... shelf holders, 14 ... shelf boards,
15 ... keyboard, 16 ... arms,
17 ... Keyboard lid, 18 ... Lower front plate,
19 ... upper front plate, 21 ... flexible plate,
31, 37 ... Electromagnetic drive unit (electromagnetic drive body / vibration body),
32 ... L-shaped bracket, 33 ... Bolt,
34 ... Nut, 35 ... Adjustment knob,
36 ... Triangular metal fittings, 41 ... Panpot circuit,
42L: Left DSP filter, 42R: Right DSP filter,
43L ... Left 4 band equalizer, 43R ... Right 4 band equalizer,
44L ... Left phase control circuit, 44R ... Right phase control circuit,
45L ... Left amplifier, 45R ... Right amplifier.

Claims (9)

A soundboard of a flat plate-like musical instrument that oscillates and radiates sound, and a soundboard or grain of each part of the soundboard that is aligned in substantially the same direction;
A plurality of sounding rods attached to the surface of the sounding board, wherein each sounding rod has a longitudinal direction substantially aligned with a direction different from the direction of the lattice or the grain of the sounding board. For the musical sound device
A vibration signal that converts a musical sound signal consisting of multiple types of musical sound into a mechanical change and drives the sound board of the instrument to emit sound from the sound sound board. The force that is fixed to the musical instrument main body at the end and the vibrating body abuts on the soundboard is substantially the same. In the support body that makes the vibration body contact the soundboard, from one end of the support body A production method or a processing method of a musical sound device, characterized in that as the length to the other end is longer, a flexible body is interposed between the vibrating body and the soundboard, and as the length is shorter, the flexible body is not interposed. A soundboard of a flat plate-like musical instrument that oscillates and radiates sound, and a soundboard or grain of each part of the soundboard that is aligned in substantially the same direction;
A plurality of sounding rods attached to the surface of the sounding board, wherein each sounding bar has a longitudinal direction substantially aligned with a direction different from the direction of the lattice or grain of the sounding board,
A plurality of vibrators that convert a musical sound signal composed of a plurality of types of musical sounds into mechanical changes, drive the soundboard of the musical instrument, and emit sound from the soundboard,
The vibration body is supported at one end and fixed to the instrument body at the other end. The force with which the vibration body abuts on the soundboard is substantially the same, and the vibration body abuts on the soundboard. The longer the length from one end to the other end of the support body, the more flexible body is interposed between the vibrating body and the soundboard, and the shorter the support body is, the less flexible body is interposed. Musical device.   The musical sound device according to claim 2, wherein the flexible body becomes thicker as the length from one end to the other end of the support is longer.   The force with which the vibrating body is brought into contact with the soundboard is the own weight of the vibrating body, 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, 9 times, 10 times, 4. The musical sound device according to claim 2, wherein the musical sound device is more than ten times or larger than several tens times and smaller than the pressure applied to the soundboard of the piece in the instrument body.   The long support from the one end to the other end is attached to the upper surface of the bottom plate of the keyboard instrument, and the short support from the one end to the other end is attached to the lower surface of the shelf of the keyboard instrument. 5. A musical sound device according to claim 2, 3 or 4.   6. The musical sound device according to claim 2, 3, 4 or 5, wherein a part of the plurality of vibrators is suspended from above and the other part is lifted from below.   The musical sound according to claim 2, 3, 4, 5, or 6, wherein the plurality of vibrators are spaced apart along a longitudinal direction of the soundboard and can be attached near an edge of the soundboard. apparatus.   The musical sound device according to claim 2, 3, 4, 5, 6 or 7, wherein the plurality of vibration exciters are attached at substantially the same height from a bottom surface of the musical sound device.   The soundboard has a line-symmetric shape, and the vibration exciter is attached at a position substantially on the axis of line symmetry. The musical sound device according to 7 or 8.

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