JP2009229534A - Keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and lightweight keyboard instrument which requires no periodical tuning and adjustment. <P>SOLUTION: A key 10 is supported by a key frame 20. When the key is untouched, a front edge of the key 10 is energized to an upper side by own weight of a hammer. A vibration plate 30 is provided at an upper side of a mass body 26 of the hammer 24. The vibration plate 30 is hit with the mass body 36 by rocking the hammer 24 by key operation. A musical instrument sound is generated according to a key pitch by amplifying vibration of the vibration plate 30 which is generated by hitting with a resonating body 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a keyboard instrument that is played by vibrating a cantilever diaphragm with a keystroke.

  In a piano that is a kind of keyboard instrument, a hammer linked to a key strikes a string to vibrate it, and the vibration is transmitted from a piece, which is one end of the string vibration, to the soundboard to be expanded and pronounced. In this case, in order to secure the sound volume and improve the sound quality, it is necessary to make the string length as long as possible, and accordingly, a large tension is required. As a result, a metal frame that can withstand a large tension is required. With this metal frame, the supporting wooden torso, legs, strings and action mechanism, the piano is heavier and larger than other instruments. Furthermore, the structure is complex, and tuning and adjustment are essential.

  An electric piano is known as one of keyboard instruments. An electric piano is a musical instrument that has a keyboard mechanism similar to that of an acoustic piano, electrically detects and amplifies the vibration of a metal bar struck by a hammer, and reproduces the output audio signal through a speaker. However, since the sound generation mechanism includes a keyboard mechanism similar to an acoustic piano, the instrument body is heavy and large. In addition, the electric piano needs to be tuned and adjusted in the same manner as the acoustic piano.

  Celesta is known as one of keyboard instruments. The Celesta produces sound by striking a piece of metal (sound plate) supported at both ends in the longitudinal direction by striking it with a hammer linked to a key. Since the sound is low as it is, a resonance box having the optimum size and shape for the sound plate is required for each pitch. As a result, the instrument body is heavy and large.

Although it is not a musical instrument, a music box is known as a music performance device. In music boxes, due to the limitations of drums and discs, only certain songs can be played automatically, and the playing time of one song is limited. Therefore, as shown in Patent Document 1 below, a diaphragm driving unit is configured using a solenoid, and the diaphragm driving unit is electrically controlled based on performance data to play the diaphragm. Automatic performance devices are also known. According to this, a large number of songs can be played, and there is no restriction on the playing time of one song. However, the performer could not play as an instrument.
Japanese Patent No. 3788321

  The present invention has been made in order to cope with the above-mentioned problem of acoustic instruments, and an object of the present invention is to provide a keyboard instrument that is small and lightweight and does not require regular tuning and adjustment.

  In order to achieve the above object, a feature of the present invention is a keyboard composed of a plurality of keys, provided corresponding to each of the plurality of keys, supported by a support member, and having a free end capable of vibration, A plurality of cantilever diaphragms that vibrate at a frequency corresponding to the key pitch of the key and a plurality of cantilever diaphragms that are provided corresponding to a plurality of keys, And a plurality of excitation mechanisms for exciting.

  In this case, the excitation mechanism may include a striking member that strikes the free end side of the cantilever diaphragm. Further, the excitation mechanism may include a repelling member that repels the free end side of the cantilever diaphragm. Moreover, while supporting the fixed end of a some cantilever diaphragm, you may make it further provide the resonance body which resonates with the vibration of a cantilever diaphragm, and a resonance body may be supported by a support member.

  In the keyboard musical instrument configured as described above, when the key is pressed, the excitation mechanism vibrates the cantilever diaphragm and generates a sound. Since this excitation mechanism can have a simple structure, the instrument body can be reduced in size and weight. In addition, since there is no portion that changes or deteriorates over time, it is not necessary to tune and adjust the instrument regularly.

  Another feature of the present invention is that one or more flipping members are provided on a rotatable main body and an outer periphery of the main body to flip the cantilever diaphragm by the rotation of the main body. The excitation mechanism is an arm that rotates the main body part in a predetermined direction by a predetermined angle during a key pressing operation and rotates the main body part by a predetermined angle in the same direction as the predetermined direction during a key release operation. It is in having further.

  In this case, the main body portion may be provided with first and second driven portions that are driven by a key pressing / releasing key operation to rotate the main body portion. When the key is pressed, the arm engages with the first driven part to rotate the main body in a predetermined direction, and when the key is released, the arm engages with the second driven part. The part may be rotated in the same direction as the key pressing operation.

  In the keyboard musical instrument configured as described above, the main body can be rotated in a direction away from the cantilever diaphragm by a key release operation. Do not touch. Therefore, no noise is generated during the key release operation, and the performance can be improved.

  Another feature of the present invention is that the flipping member is provided at one end of the key interlocking member that swings when the key is pressed and released, and the cantilever diaphragm is rotated by the swinging of the key interlocking member. The excitation mechanism is further supported rotatably and supports the key interlocking member so that it can swing, and one end of the key interlocking member faces the cantilever diaphragm side when the key is depressed. There is provided a rocking restricting member for restricting the rocking of the key interlocking member so that the key interlocking member is moved and one end of the key interlocking member is moved to the opposite side of the cantilever diaphragm when the key is released.

  In this case, the swing restricting member is composed of a cam that is rotatably supported and is eccentrically coupled to the key interlocking member, and further includes a reverse rotation prevention mechanism that prevents reverse rotation of the cam on the outer periphery of the cam. It is good to do so.

  In the keyboard musical instrument configured as described above, the cam constituting the rocking restricting member rotates in the same direction when a key release operation is performed. As a result, the playing part is moved away from the cantilever diaphragm during the key release operation, so that the playing part does not contact the cantilever diaphragm. Therefore, no noise is generated during the key release operation, and the performance can be improved.

  Another feature of the present invention is that the repelling member is provided at one end of the key interlocking member supported so as to be swingable and the key interlocking member, and repels the cantilever diaphragm by the swinging of the key interlocking member. The excitation mechanism is further rotatably supported, and connects the key and the key interlocking member to swing the key interlocking member when the key is pressed and released, so that the key is locked when the key is pressed. There is provided a link mechanism that moves one end of the interlocking member to the cantilever diaphragm and moves one end of the key interlocking member to the side opposite to the cantilever diaphragm when the key is released.

  In this case, the link mechanism is composed of a cam that is rotatably supported and has an eccentrically coupled key interlocking member, and further includes a reverse rotation prevention mechanism that prevents reverse rotation of the cam on the outer periphery of the cam. Good.

  In the keyboard musical instrument configured as described above, the cam constituting the link mechanism rotates in the same direction when the key release operation is performed. As a result, the playing part is moved away from the cantilever diaphragm during the key release operation, so that the playing part does not contact the cantilever diaphragm. Therefore, no noise is generated during the key release operation, and the performance can be improved.

  Another feature of the present invention is that the excitation mechanism includes a key interlocking member that swings in conjunction with a key pressing / releasing key operation, and the flipping member is further supported to be swingable with respect to the key interlocking member. And has a repelling part that repels the cantilever diaphragm at one end, and the key of the repelling member is such that one end of the repelling member comes into contact with the cantilever diaphragm when the key is depressed. Regulates the angle of the flip member relative to the key interlock member so that one end of the flip member does not come into contact with the cantilever diaphragm even when the key interlock member swings when the key is released. An angle restricting mechanism is provided.

  In the keyboard musical instrument configured as described above, after the sound is generated by pressing the key, the angle of the playing portion with respect to the key interlocking member is restricted, and the distance from the swing center of the key interlocking member to one end of the playing portion is reduced. When the key is released, the playing part does not contact the cantilever diaphragm. Therefore, no noise is generated during the key release operation, and the performance can be improved.

  Another feature of the present invention is that an operation element operated by a user, and a damping member that contacts the cantilever diaphragm and suppresses vibration of the cantilever diaphragm in accordance with the operation of the operation element. It is in having prepared.

  In the keyboard instrument configured as described above, the vibration of the cantilever diaphragm is suppressed and the sound is muted by operating the operation element before the vibration of the cantilever diaphragm naturally attenuates and the sound disappears. Because it can, you can control the length of the sound during the performance.

  In addition, another feature of the present invention is further provided with an operator operated by a user, and a damping member that contacts the resonator and suppresses vibration of the resonator according to the operation of the operator. There is.

  In the keyboard instrument configured as described above, the vibration of the resonator can be suppressed and the sound can be turned off by operating the operation element before the vibration of the resonator is naturally attenuated and the sound disappears. The length of the sound can be controlled during performance.

  In addition, another feature of the present invention is that an operator operated by a user and a plurality of pieces by changing relative positions of the plurality of excitation members and the plurality of cantilever diaphragms according to the operation of the operator. According to another aspect of the present invention, excitation force changing means for changing the excitation force applied to the holding diaphragm is further provided.

  In the keyboard musical instrument configured as described above, the excitation force to the cantilever diaphragm can be changed by operating the operator, so that the tone color and volume can be changed during performance.

a. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a keyboard instrument according to the first embodiment. This keyboard instrument is provided with a keyboard device including a plurality of white keys 10 and black keys 10 arranged in the lateral direction at the front part of the upper surface.

  FIG. 2A and FIG. 2B are side views showing one key by longitudinally cutting the keyboard instrument. Although only the white key is shown in FIGS. 2A and 2B, the same applies to the black key, and both will be described below as the key 10. FIG. 2A shows a state where the key 10 is released. On the other hand, FIG. 2B shows a state where the key 10 is pressed. The key 10 is formed in a long shape from a synthetic resin, and is arranged extending in the front-rear direction. The key 10 is supported by the key support portion 20 of the frame FR so that the front end portion can swing in the vertical direction around the rotation center 21 at the rear end portion. At the front part of the frame FR, a long lower limit stopper 22 made of an impact absorbing material such as felt extends in the lateral direction of the keyboard and is fixed to the frame FR. This lower limit stopper 22 restricts the downward displacement of the front portion of the key 10. The frame FR means a structure for supporting various parts of the keyboard instrument and the housing of the keyboard instrument itself. On the lower surface of the front portion of the key 10, a rod-shaped hammer drive portion 23 is integrally provided and extends downward.

  The hammer 24 includes a base portion 25 formed in a long shape with a synthetic resin, and a rubber mass body 26 assembled to the tip of the base portion 25. The lower surface of the hammer drive unit 23 is in contact with the upper surface of the front portion of the base 25 of the hammer 24. The hammer 24 is supported by a hammer support portion 27 provided on the frame FR so as to be rotatable around the axis of the pin, and the mass body 26 can swing in the vertical direction. In a state where the key 10 is not pressed, the mass body 26 is positioned on the hammer stopper portion 28 as shown in FIG. The hammer stopper portion 28 is formed in an elongated shape by an impact absorbing material such as felt, and extends in the lateral direction and is fixed to the frame FR.

  Above the mass body 26, a diaphragm 30 as a sounding body is extended. The diaphragm 30 is formed in a long shape with a plate-like elastic member such as metal. As shown in FIGS. 2A, 2B, and 3, one end of the diaphragm 30 is fixed to the upper surface of a flat plate-like resonator 31 provided at the rear of the instrument. The other end protrudes forward from the resonance body 31 (above the mass body 26). That is, the diaphragm 30 is supported in a cantilever shape. The diaphragm 30 is configured to have a different width, thickness, and length in order to vibrate at a vibration frequency corresponding to the pitch of each key. The resonator 31 is fixed to the frame FR via the resonator support member 32. One resonator 31 may be provided for all the diaphragms 30, or the resonator 31 may be provided for each of the plurality of diaphragms 30.

  Next, the operation of the keyboard musical instrument according to the first embodiment configured as described above will be described. When the key 10 is not depressed, the hammer 24 is in the state shown in FIG. 2A due to its own weight, and the mass body 26 is in contact with the hammer stopper 28. In this state, the front portion of the key 10 is pushed upward by the base portion 25 of the hammer 24 via the hammer drive portion 23. On the other hand, when the key 10 is pressed, the hammer 10 pushes the base 25 downward against the weight of the mass body 26 of the hammer 24, while the key 10 is centered on the rotation center 21 as shown in FIG. ) And FIG. 2B, the hammer 24 starts to rotate counterclockwise with the hammer support portion 27 provided on the frame FR as a fulcrum. At this time, the front lower surface of the key 10 abuts on the lower limit stopper 22, and the downward displacement of the front portion of the key 10 is restricted. On the other hand, the hammer 24 is released from the hammer drive unit 23 and further rotates, and the mass body 26 strikes the diaphragm 30. Thereby, the diaphragm 30 vibrates, and this vibration is transmitted to the resonance body 31, and the volume is amplified by the resonance body 31. As a result, an instrument sound corresponding to the key pitch is generated.

  After striking the diaphragm, the mass body 26 is bounced back by the diaphragm 30, and the hammer 24 rotates clockwise in FIGS. 2A and 2B with the hammer support portion 27 as a fulcrum. Thereafter, the rotation of the hammer 24 stops when the base portion 25 comes into contact with the hammer drive portion 23. When the key pressing operation of the key 10 is released (that is, when the key 10 is released), the hammer 24 further rotates clockwise around the hammer support portion 27 by the weight of the mass body 26. When the mass body 26 comes into contact with the hammer stopper 28, the rotation of the hammer 24 is stopped. The rotation of the hammer 24 causes the base portion 25 to push up the front portion of the key 10 via the hammer driving portion 23, so that the key 10 returns to its original position (position shown in FIG. 2A).

  In the keyboard musical instrument according to the first embodiment configured as described above, the diaphragm 30 can be struck by the mass body 26 interlocked with the key 10 and sounded by pressing the key 10. Since the mass body 26 bounces off the diaphragm 30 and then moves away from the diaphragm 30, the mass body 26 does not suppress the vibration of the diaphragm 30 by pressing the diaphragm 30. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

b. Second Embodiment Next, a description will be given of a second embodiment of the present invention in which the free end of the diaphragm 30 is played by the playing portion 44 provided at the rear end of the key 10 to generate sound. FIG. 4 is a side view showing a state in which the key 10 is released as in the first embodiment. The key 10 is supported by a key support portion 40 provided on the frame FR so that the front end portion thereof can swing in the vertical direction around the rotation center 41. A lower limit stopper 22 is fixed to the front portion of the frame FR as in the first embodiment. A leaf spring 42 is fixed to the frame FR below the front portion of the key 10 to urge the front portion of the key 10 upward. An upper limit stopper 43 similar to the lower limit stopper 22 is fixed on the frame FR below the rear part of the key 10 and restricts the upward displacement of the front part of the key 10. On the upper surface of the rear part of the key 10, a playing part 44 for playing the diaphragm 30 is assembled so that the tip part projects from the rear end of the key 10 to the rear side of the instrument. The flip portion 44 is formed of a metal flat plate so that the longitudinal cross-sectional shape of the tip portion has an acute angle. Above the flipping portion 44, the diaphragm 30 is configured in the same manner as in the first embodiment.

  Next, the operation of the keyboard instrument according to the second embodiment configured as described above will be described. When the key 10 is not depressed, the front portion of the key 10 is urged upward by the leaf spring 42. On the other hand, when the key 10 is pressed against the urging force of the leaf spring 42, the key 10 starts to rotate counterclockwise in FIG. 4 about the rotation center 41, and the flip portion 44 is displaced upward. . Thereafter, the flip portion 44 abuts on the free end of the diaphragm 30 and pushes and bends the free end side of the diaphragm 30 upward. When the flip portion 44 is further displaced upward, the flip portion 44 gets over the diaphragm 30. That is, the playing unit 44 plays the diaphragm 30. As a result, as in the first embodiment, the diaphragm 30 vibrates, the vibration is amplified by the resonator 31, and an instrument sound corresponding to the key pitch is generated. When the key is further depressed, the lower surface of the front portion of the key 10 comes into contact with the lower limit stopper 22, and the downward displacement of the front portion of the key 10 is restricted.

  When the key pressing operation of the key 10 is released, the front portion of the key 10 is pushed upward by the urging force of the leaf spring 42. As a result, the key 10 starts to rotate clockwise in FIG. 4 around the rotation center 41, and the playing portion 44 is displaced downward. Then, the flip portion 44 comes into contact with the free end of the diaphragm 30 and suppresses vibration of the diaphragm 30. When the flip portion 44 is further displaced downward, the flip portion 44 gets over the diaphragm 30. When the rear lower surface of the key 10 comes into contact with the upper limit stopper 43, the upward displacement of the front portion of the key 10 is restricted, and the key 10 returns to the original position (the position in FIG. 4).

  In the keyboard musical instrument according to the second embodiment configured as described above, the diaphragm 30 can be played and sounded by the playing portion 44 assembled on the upper surface of the rear portion of the key 10 by pressing the key 10. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

c. Third Embodiment Next, a third embodiment of the present invention in which the playing unit 44 is provided in a mechanism that swings in conjunction with the key 10 will be described. FIG. 5 is a side view showing a state where the key 10 is released in the same manner as in the first embodiment. The key 10 is supported in the same manner as in the first embodiment, and the lower limit stopper 22 is also arranged in the same manner as in the first embodiment. On the lower surface of the key 10, a bar-like swing lever driving unit 50 is integrally provided and extends downward. The lower surface of the swing lever driving unit 50 is in contact with the upper surface of the front portion of the swing lever 51. The swing lever 51 is formed in a long shape with a synthetic resin. On the upper surface of the rear portion of the swing lever 51, a flip portion 44 is assembled in the same manner as in the second embodiment. The swing lever 51 is supported by a swing lever support portion 52 provided on the frame FR so as to be rotatable about the axis of the pin, and the flip portion 44 can swing in the vertical direction. A leaf spring 54 is fixed to the frame FR below the front portion of the swing lever 51 and urges the front portion of the swing lever 51 upward. An upper limit stopper 43 similar to the lower limit stopper 22 is fixed on the frame FR below the rear portion of the swing lever 51 and restricts the upward displacement of the front portion of the swing lever 51. Above the flipping portion 44, the diaphragm 30 is configured in the same manner as in the first embodiment.

  Next, the operation of the keyboard instrument according to the third embodiment configured as described above will be described. When the key 10 is not depressed, the front portion of the swing lever 51 is biased upward by the leaf spring 54, and the front portion of the key 10 is biased upward via the swing lever drive unit 50. On the other hand, when the key 10 is depressed, the rocking lever driving unit 50 opposes the urging force of the leaf spring 54 and pushes the front part of the rocking lever 51 downward, while the key 10 is centered on the rotation center 21. As shown in FIG. 5, it starts to rotate counterclockwise. The swing lever 51 starts to rotate counterclockwise with the swing lever support portion 52 provided on the frame as a fulcrum, and the flip portion 44 is displaced upward. Thereafter, as in the second embodiment, the playing unit 44 plays the diaphragm 30, the diaphragm 30 vibrates, the vibration is amplified by the resonator 31, and a musical instrument sound corresponding to the key pitch is generated. When the key is further depressed, the lower surface of the front portion of the key 10 comes into contact with the lower limit stopper 22, and the downward displacement of the front portion of the key 10 is restricted.

  When the key pressing operation of the key 10 is released, the front portion of the swing lever 51 is pushed upward by the urging force of the leaf spring 54. As a result, the swing lever 51 starts swinging clockwise in FIG. 5 with the swing lever support portion 52 as a fulcrum, and the flip portion 44 is displaced downward. The flip portion 44 abuts on the diaphragm 30 and suppresses vibration of the diaphragm 30. When the flip portion 44 is further displaced downward, the flip portion 44 gets over the diaphragm 30. When the rear lower surface of the swing lever 51 contacts the upper limit stopper 43, the upward displacement of the front portion of the swing lever 51 is restricted. The key 10 also stops swinging in conjunction with the swing lever 51, and the key 10 returns to its original position (position in FIG. 5).

  Also in the keyboard musical instrument according to the third embodiment configured as described above, the diaphragm 30 can be played and sounded by the playing portion 44 assembled to the swing lever 51 that is interlocked with the key pressing operation of the key 10. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

d. Fourth Embodiment Next, a fourth embodiment of the present invention in which the flip portion 44 is rotated in a certain direction will be described. FIG. 6 is a side view showing a state in which the key 10 is released as in the second embodiment. The key 10 is supported similarly to the second embodiment, and the swing range is restricted by the lower limit stopper 22 and the upper limit stopper 43. The front portion of the arm 61 is in contact with the upper surface of the rear portion of the key 10.

  The arm 61 includes a base 62, a first drive unit 63, and a second drive unit 64. FIG. 7 is an enlarged view of the rear part of the arm 61. The base portion 62 is a synthetic resin and is a long plate-like member having two sides having a predetermined angle. The first driving portion 63 and the second driving portion 64 are bent portions that are bent in an arc shape with a metal material. It is the plate-shaped member shape | molded so that it may have. The front end surface of each bent portion is a flat surface. The first drive unit 63 is assembled on the surface of the rear end portion of the base 62 on the high pitched portion side (right side as viewed from the performer side) so that the bent portion 63 is directed downward from above. The second drive unit 64 is assembled on the bass portion side (left side as viewed from the performer side) of the rear end portion of the base portion 62 such that the bent portion is directed upward from below. Each of the first drive unit 63 and the second drive unit 64 has a bent portion that protrudes from the rear end of the base portion 62 and is slightly shifted in the lateral direction.

  The arm 61 is supported so as to be rotatable about a rotation center 66 provided on an arm support member 65 fixed to the frame FR. When the key 10 is not depressed, the arm 61 is positioned on the arm stopper 67. The arm stopper 67 is formed in a long shape by an impact absorbing material such as felt, and extends in the lateral direction and is fixed to the frame FR. On the rear side of the arm 61, as shown in an enlarged view in FIGS. 8A and 8B, the rotary claw 90 is sandwiched between the first drive unit 63 and the second drive unit 64 of the arm 61. The arm support member 65 is supported so as to be rotatable about a rotation center 68.

  Here, the configuration of the rotating claw 90 will be described with reference to FIG. FIG. 9A is a side view of the rotary claw 90 viewed from the treble portion side (right side as viewed from the performer side), and FIG. 9B is a plan view. FIG. 9C is a side view seen from the bass part side (left side as seen from the performer side). The rotating claw 90 is composed of a metal first disc portion 91, a second disc portion 92, and a third disc portion 93, which are integrally joined.

  The first disc portion 91 has a plurality of (for example, four) playing portions 44 on the outer peripheral portion. The flip portion 44 is provided in a protruding shape on the outer periphery of the first disc portion 91 and abuts on the diaphragm 30 to play the diaphragm 30. The surface that contacts the diaphragm 30 of the flip portion 44 is an arcuate curved surface.

  The second disk portion 92 has the same number of first driven portions 95 as the flip portion 44 on the outer peripheral portion. The first driven portion 95 is provided in a protruding shape on the outer peripheral portion of the disk, and has a flat surface portion that comes into contact with the tip surface of the first drive portion 63 and an arcuate curved surface that comes into contact with the bent surface of the first drive portion 63 Part.

  Similarly to the second disc portion 92, the third disc portion 93 has the same number of second driven portions 96 as the flip portion 44 on the outer peripheral portion. The second driven portion 96 is in contact with the second driven portion 96, but the shape of the second driven portion 96 is the same as that of the first driven portion 95. However, the third disk portion 93 is different from the second disk portion 92 in the direction of each driven portion by 45 degrees.

  The first driven part 95 is located on the high sound part side (right side as viewed from the player side) with respect to the playing part 44, and the second driven part 96 is located on the bass part side (left side as viewed from the player side). . On the rear side of the rotating claw 90, the diaphragm 30 is configured similarly to the first embodiment.

  Next, the operation of the keyboard instrument according to the fourth embodiment configured as described above will be described. FIGS. 10 (A), 11 (A), 12 (A), and 13 (A) show the keyboard instrument according to the present invention in order to show the operation of the arm 61 and the rotating claw 90 at the time of pressing and releasing keys. Is an enlarged side view as viewed from the treble part side (right side as viewed from the performer side). In addition, FIG. 10A, FIG. 11A, FIG. 12A, and FIG. 13A are respectively enlarged side views viewed from the bass portion side (left side as viewed from the performer side). 10 (B), FIG. 11 (B), FIG. 12 (B) and FIG. 13 (B).

  In a state in which the key 10 is not depressed, the front portion of the key 10 is urged upward by the leaf spring 42 and is in the state of FIG. At this time, the first drive portion 63 of the arm 61 is separated from the first driven portion 95 of the rotary claw 90 as shown in FIG. On the other hand, as shown in FIG. 10B, the distal end surface of the second driving portion 64 of the arm 61 is in contact with the flat portion of the second driven portion 96 of the rotating claw 90. Further, the arcuate curved surfaces of the second driving unit 64 and the second driven unit 96 are in contact with each other. Therefore, in this state, the rotating claw 90 is fixed by the second drive unit 64 and cannot rotate.

  On the other hand, when the key 10 is pressed against the urging force of the leaf spring 42, the key 10 starts to rotate counterclockwise in FIG. Then, the rear part of the key 10 is displaced upward, and the front part of the arm 61 in contact with the key 10 is displaced upward. As a result, the arm 61 rotates about the rotation center 66 in the clockwise direction in FIG. When the key is pushed, as shown in FIG. 11A, the tip end surface of the first driving portion 63 of the arm 61 comes into contact with the first driven portion 95 of the rotating claw 90, and the rotating claw 90 is moved to FIG. Try to rotate clockwise in A). At this time, as shown in FIG. 11B, the second driven portion 96 is released from the second driving portion 64 of the arm 61, so that the rotating claw 90 is rotatable. As the key depression proceeds, the rotary claw 90 rotates, and the flipping portion 44 also rotates accordingly. Thereafter, the flipping portion 44 abuts on the free end of the diaphragm 30 and pushes and bends the free end side of the diaphragm 30 downward. When the flip portion 44 further rotates, the flip portion 44 gets over the diaphragm 30 as shown in FIG. That is, the playing unit 44 plays the diaphragm 30. Then, as in the second embodiment, the diaphragm 30 vibrates, the vibration is amplified by the resonator 31, and an instrument sound corresponding to the key pitch is generated. When the key is further depressed, the lower surface of the front portion of the key 10 comes into contact with the lower limit stopper 22, and the swinging of the key 10 is stopped and the rotation of the rotary claw 90 is also stopped. In this state, as shown in FIG. 12B, the second drive unit 64 of the arm 61 is separated from the second driven unit 96 of the rotary claw 90. On the other hand, as shown in FIG. 12A, since the arcuate curved surfaces of the first driving portion 63 of the arm 61 and the first driven portion 63 of the rotating claw 90 abut, the rotating claw 90 cannot rotate. It has become.

  When the key pressing operation of the key 10 is released, the front portion of the key 10 is pushed upward by the urging force of the leaf spring 42. As a result, the key 10 starts to rotate clockwise in FIG. 6 about the rotation center 41. The rear end of the key 10 is displaced downward, and the arm 61 rotates counterclockwise in FIG. 6 around the rotation center 66 by its own weight. Then, as shown in FIG. 13B, the tip surface of the second drive portion 64 of the arm 61 comes into contact with the flat portion of the second driven portion 96 of the rotary claw 90, and the rotary claw 90 is pressed when the key is pressed. It tries to rotate in the same direction (clockwise in FIG. 13A). At this time, as shown in FIG. 13A, since the first driven portion 95 of the rotating claw 90 is released from the first driving portion 63 of the arm 61, the rotating claw 90 is rotatable. When the key release proceeds, the playing portion 44 that has struck the diaphragm 30 by pressing the key is rotated in a direction away from the diaphragm 30. When the rear lower surface of the key 10 comes into contact with the upper limit stopper 43, the upward displacement of the front portion of the key 10 is restricted, the key 10 returns to the original position (the position in FIG. 6), and the arm 61 and the rotating claw 90 Is also returned to its original position (the positions in FIGS. 10A and 10B).

  Also in the keyboard musical instrument according to the fourth embodiment configured as described above, the vibrating claw 90 can be rotated and the diaphragm 30 can be played and sounded by the arm 61 interlocked with the key pressing operation of the key 10. Further, since the rotary claw 90 can be rotated in the direction in which the flip unit 44 moves away from the diaphragm 30 by the key release operation, the flip unit 44 does not contact the diaphragm 30 during the key release operation. Therefore, no noise is generated during the key release operation, and the performance can be improved. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

e. Fifth Embodiment Next, a fifth embodiment of the present invention provided with a mechanism for restricting the swing of the swing lever 51 in the third embodiment will be described. FIG. 14 is a side view showing a state in which the key 10 is released as in the third embodiment. The key 10 is configured in the same manner as in the third embodiment, and the lower surface of the swing lever driving unit 50 is in contact with the upper surface of the front portion of the swing lever 51.

  The swing lever 51 has a shape different from that of the third embodiment. In this case, the swing lever 51 is also formed into a long shape with a synthetic resin. A metal repelling part 44 for repelling the diaphragm 30 is assembled to the rear end part of the swing lever 51. The front end of the playing portion 44 protrudes from the rear end of the swing lever 51 toward the rear side of the instrument. The swing lever 51 is supported by a swing lever support portion 52 provided on the frame FR so as to be rotatable about the axis of the pin, and the flip portion 44 can swing in the vertical direction. Further, the rocking lever 51 has a slit-like portion that engages with the rocking lever support 52, so that the rocking lever 51 can be moved back and forth. The rear portion of the swing lever 51 is eccentrically coupled to the cam 141 so as to be rotatable. The cam 141 is a disk-shaped member having a convex portion 141a on the outer peripheral portion, and is rotatably supported by a cam support portion 142 provided on the frame FR. A reverse rotation prevention mechanism 143 for preventing reverse rotation of the cam 141 is provided above the cam 141. The reverse rotation prevention mechanism 143 includes a pressing member 144, a compression spring 145, and a pressing member guide 146. The pressing member guide 146 is a cylindrical member, has a flange at one end, and is fixed to the frame FR at the flange portion. The pressing member 144 is a metal columnar member, the tip of which is formed in a hemispherical shape. The pressing member 144 is accommodated in the pressing member guide 146 so as to be slidable in the axial direction, and is urged downward by a compression spring 145. ing. The tip of the pressing member 144 protrudes from the pressing member guide 146 and is in sliding contact with the outer periphery of the cam 141. Further, the diaphragm 30 is configured in the same manner as in the third embodiment behind the flip portion 44.

  Next, the operation of the keyboard instrument according to the fifth embodiment configured as described above will be described. In a state where the key 10 is not depressed, the swing lever 51 is biased upward by the leaf spring 54, and the front portion of the key 10 is biased upward via the swing lever driving unit 50. On the other hand, when the key 10 is depressed, the rocking lever driving unit 50 opposes the biasing force of the leaf spring 54 and pushes the rocking lever 51 downward, while the key 10 is centered on the rotation center 21. At 14 start rotating counterclockwise. The swing lever 51 starts to rotate counterclockwise with the swing lever support portion 52 provided on the frame as a fulcrum, and the flip portion 44 is displaced upward. At this time, since the swing lever 51 is eccentrically coupled to the cam 141 at the rear portion, the swing lever 51 rotates counterclockwise in FIG. 14 about the rotation center of the cam support portion 142. Let As a result, the swing lever 51 moves backward. Thereafter, as in the third embodiment, the playing unit 44 plays the diaphragm 30, the diaphragm 30 vibrates, the vibration is amplified by the resonator 31, and a musical instrument sound corresponding to the key pitch is generated.

  Immediately before the end of key pressing, as shown in FIG. 15A, the pressing member 144 is pushed into the pressing member guide 146 by the convex portion 141a of the cam 141, and the compression spring 145 is compressed. Thereafter, as shown in FIG. 15B, the pressing member 144 presses the convex portion 141a of the cam 141 by the repulsive force of the compression spring 145, thereby forcibly rotating the cam 141 counterclockwise in FIG. The key-pressing operation ends. By forcibly rotating the cam 141 in this way, the position of the swing lever 51 at the start of the key release operation can be set to a position where the cam 141 does not rotate backward (clockwise in FIG. 14).

  When the key pressing operation of the key 10 is released, the front portion of the swing lever 51 is pushed upward by the urging force of the leaf spring 54. As a result, the swing lever 51 starts swinging clockwise in FIG. 14 with the swing lever support portion 52 as a fulcrum, and the flip portion 44 is displaced downward. At this time, the swing lever 51 rotates the cam 141 counterclockwise around the rotation center of the cam support 142 in FIG. As a result, the swing lever 51 moves forward, and the tip of the playing portion 44 passes through a path away from the diaphragm 30, unlike when the key is depressed. Immediately before the end of the key release operation, the reverse rotation prevention mechanism 143 operates in the same manner as immediately before the end of the key press operation, and the cam 141 is forcibly prevented from rotating reversely (clockwise in FIG. 14) during the next key press operation. Then, the cam 141 is rotated counterclockwise in FIG. Thereafter, the key 10 returns to the original position (position in FIG. 14).

  In the keyboard musical instrument according to the fifth embodiment configured as described above, the diaphragm 30 can be played and sounded by the playing portion 44 assembled to the swing lever 51 that is interlocked with the key pressing operation of the key 10. The movement of the swing lever 51 is restricted by the cam 141 and the reverse rotation prevention mechanism 143, and since the flip portion 44 passes through a path away from the diaphragm 30 when the key is released, no noise is generated when the key is released. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

f. Sixth Embodiment Next, a sixth embodiment of the present invention provided with a link mechanism driven by the key 10 will be described. FIG. 16 is a side view showing the state in which the key 10 is released as in the fifth embodiment.

  A drive arm support 162 is integrally provided on the key 10 on the lower surface of the key 10. Below the key 10, a cam 160 is rotatably supported by a cam support portion 142 provided on the frame FR. The cam 160 is composed of three disk-shaped members, and each disk-shaped member is laminated with the central axis of the disk-shaped member aligned in the plate thickness direction via columnar connecting members 165a and 165b. ing. As shown in FIGS. 17 (A) and 17 (B), the respective disk-like members are connected at an eccentric position, and the respective connecting positions are different by 90 degrees. In addition, only the disk-like member on the bass portion side (left side as viewed from the performer side) has a convex portion 160a on the outer peripheral portion.

  The drive arm 163 is a member formed in a long shape with a synthetic resin, and an upper end of the drive arm 163 is supported so as to be rotatable about the rotation center of the drive arm support portion 162. On the other hand, the lower end of the drive arm 163 is rotatably supported by a connecting member 165a on the low sound portion side (left side as viewed from the performer side) of the cam 160.

  The swing lever 51 has a shape different from that of the fifth embodiment. In this case, the swing lever 51 is also formed into a long shape with a synthetic resin, and a metal playing portion for playing the diaphragm 30 at the rear end portion. 44 is assembled. The front end of the swing lever 51 is rotatably supported by a connecting member 165b on the treble portion side (right side as viewed from the performer side). Similarly to the fifth embodiment, the swing lever 51 is supported by a swing lever support portion 52 provided on the frame FR so as to be rotatable about the axis of the pin, and the flip portion 44 swings in the vertical direction. It is possible. Furthermore, the swing lever 51 has a slit-like portion that engages with the swing lever support portion 52, so that the swing lever 51 can move back and forth. The swing lever 51, the cam 160, the drive arm 163, and the like constitute the link mechanism of the present invention.

  Further, a reverse rotation prevention mechanism 143 similar to that of the fifth embodiment is provided in front of the cam 160, and the tip of the pressing member 144 is a disc-like shape on the bass portion side (left side as viewed from the player side) of the cam 160. It is in sliding contact with the outer periphery of the member. Further, the diaphragm 30 is configured in the same manner as in the fifth embodiment behind the flip portion 44.

  Next, the operation of the keyboard musical instrument according to the sixth embodiment configured as described above will be described. In a state where the key 10 is not depressed, the front portion of the key 10 is urged upward by the leaf spring 42 as the return means. On the other hand, when the key 10 is depressed, the key 10 starts to rotate counterclockwise in FIG. The drive arm 163 rotates the cam 160 counterclockwise in FIG. 16 around the rotation center of the cam support portion 142. The swing lever 51 starts to rotate clockwise in FIG. 16 with the swing lever support portion 52 provided on the frame FR as a fulcrum, and the flip portion 44 is displaced downward. Thereafter, as in the fifth embodiment, the playing unit 44 plays the diaphragm 30, the diaphragm 30 vibrates, the vibration is amplified by the resonator 31, and a musical instrument sound corresponding to the key pitch is generated. Since the swing lever 51 is eccentrically coupled to the cam 160, the swing lever 51 moves forward while swinging with the swing lever support member 52 as a fulcrum by the rotation of the cam 160. Immediately before the end of key pressing, as in the fifth embodiment, the reverse rotation prevention mechanism 143 forces the cam 160 to the position where the cam 160 does not rotate backward (clockwise in FIG. 16) when the key release operation starts. Rotated.

  When the key pressing operation of the key 10 is released, the front portion of the key 10 is pushed upward by the urging force of the leaf spring 42. Accordingly, the cam 160 rotates counterclockwise in FIG. 16, and the swing lever 51 swings with the support member 52 as a fulcrum, while the support portion (the connecting member 165b) at the front end of the lever 51 moves downward and rearward. And then move backward and upward. Immediately before the end of the key release, as in the fifth embodiment, the reverse rotation prevention mechanism 143 forcibly rotates the cam 160 to a position where it does not reversely rotate when the next key pressing operation starts. Then, the key 10 and the swing lever 51 return to their original positions (positions in FIG. 16).

  Also in the keyboard musical instrument according to the sixth embodiment configured as described above, the diaphragm 30 can be played and sounded by the playing portion 44 assembled to the swing lever 51 interlocked with the key pressing operation of the key 10. When the key is pressed by the link mechanism constituted by the cam 160 and the swing lever 51, the support portion (the connecting member 165b) at the front end of the lever 51 moves so as to pass through the path A3 (FIG. 16). 51, the front end of the lever 51 is lifted, and the repelling part 44 moves along the path A1 (FIG. 16). When the key is released, the support part (connecting member 165b) at the front end of the lever 51 passes through the path A4 (FIG. 16). By moving, the playing unit 44 passes through the path A2 (FIG. 16) away from the diaphragm 30, so that no noise is generated when the key is released. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

g. Seventh Embodiment Next, a seventh embodiment of the present invention in which the rear portion of the swing lever 51 is refracted and the refraction angle is regulated will be described. FIG. 18 is a side view showing the state in which the key 10 is released as in the third embodiment. The key 10 is configured in the same manner as in the third embodiment, and the lower surface of the swing lever driving unit 50 is in contact with the upper surface of the front portion of the swing lever 51.

  Unlike the third embodiment, the swing lever 51 includes a base 51a and a refraction part 51b. In this case, the base 51a and the refraction part 51b are formed in a long shape with a synthetic resin. The base 51a is supported by a rocking lever support 52 provided on the frame FR so as to be rotatable around the axis of the pin.

  A refracting portion 51b is swingably supported with respect to the base 51a on the treble portion side (right side as viewed from the performer side) of the rear portion of the base 51a. A metal playing portion 44 is assembled at the rear end of the refracting portion 51b. FIG. 19 is an enlarged perspective view of the refracting portion 51b. The refracting portion 51b has three thin triangular projections to form the first recess 191b and the second recess 191c on the side edge portion on the bass portion side (left side as viewed from the performer side) of the upper surface. It is provided to be connected. The other part of the upper surface is a flat surface portion 191a.

  A columnar angle regulating member 182 selectively engages with the first recess 191b and the second recess 191c. The angle regulating member 182 is urged toward the refracting portion 51b by a leaf spring 183 fixed to the base portion 51a. Therefore, when the angle restricting member 182 is engaged with the first recess 191b, the angle of the refracting portion 51b with respect to the base 51a is restricted to the first angle (FIG. 20A). On the other hand, when engaged with the second recess 191c, the second angle (FIG. 20B) is regulated.

  In the state of the first angle (FIG. 20A), the distance from the rotation center of the swing lever 51 to the tip of the flip portion 44 becomes large, and the tip of the flip portion 44 vibrates when the swing lever 51 swings. It can abut against the free end of the plate 30. On the other hand, in the state of the second angle (FIG. 20B), the distance from the rotation center of the swing lever 51 to the tip of the flip portion 44 is small, and the tip of the flip portion 44 is swung when the swing lever 51 swings. Does not contact the free end of the diaphragm 30.

  The upper limit stopper 43 has a different shape from that of the third embodiment, but in this case as well, the upper limit stopper 43 is similarly disposed below the rear part of the swing lever 51 so as to be raised above the front part of the key 10 when the key is released. Regulate displacement. Furthermore, the upper limit stopper 43 restricts the angle of the refracting portion 51b to the first angle (FIG. 20A) at the end of key release.

  On the other hand, unlike the third embodiment, the lower limit stopper 22 has a rectangular parallelepiped member made of a shock absorbing material such as felt arranged on the frame FR for each key 10, and a flat portion of the refracting portion 51b of each key 10 when the key is depressed. It contacts only 191a and does not contact the base 51a. Thereby, the lower limit stopper 22 restricts the downward displacement of the front portion of the key 10 when the key is depressed, and restricts the angle of the refracting portion 51b to the second angle (FIG. 20B). The angle restricting member 182, the leaf spring 183, the base 51 a and the refracting portion 51 b constitute the angle restricting mechanism of the present invention.

  Next, the operation of the keyboard musical instrument according to the seventh embodiment configured as described above will be described. FIG. 21A to FIG. 21D are diagrams showing the operations of the base 51a and the refraction part 51b during the key pressing operation. 21A to 21D, the angle regulating member 182, the first recess 191b, and the second recess 191c are omitted. When the key 10 is not depressed, the front portion of the swing lever 51 is urged upward by the urging force of the leaf spring 54 as in the third embodiment. At this time, the bottom surface of the refracting portion 51b contacts the upper limit stopper 43, so that the angle between the refracting portion 51b and the base portion 51a is restricted to the first angle (FIG. 20A).

  When the key 10 is depressed, the swing lever 51 rotates counterclockwise in FIG. 21 as in the third embodiment, and the flipping portion 44 is displaced upward. At this time, the angle restricting member 182 restricts the angle between the refracting portion 51b and the base portion 51a to the first angle (FIG. 20A), so that the repelling portion 44 pushes the diaphragm 30 as in the third embodiment. The diaphragm 30 vibrates, the vibration is amplified by the resonance body 31, and a musical instrument sound corresponding to the key pitch is generated. When the key is further depressed, as shown in FIG. 21B, the upper limit stopper 22 comes into contact with the flat portion 191a on the upper surface of the refracting portion 51b. The base 51 a can be further rotated without being restricted by the upper limit stopper 22, but the movement of the refracting part 51 b is restricted by contacting the upper limit stopper 22. That is, the refraction part 51b is rotated counterclockwise in FIG. 21 with respect to the base part 51a. At this time, the angle regulating member 182 moves to the second recess 191c against the urging force of the leaf spring 183. Accordingly, as shown in FIG. 21C, the angle between the base 51a and the refracting portion 51b is restricted to the second angle (FIG. 20B).

  When the key pressing operation of the key 10 is released, the swing lever 51 starts swinging clockwise in FIG. 21 as in the third embodiment, and the playing portion 44 is displaced downward. At this time, the angle between the refracting part 51b and the base part 51a is regulated to the second angle (FIG. 20B) by the angle regulating member 182. Therefore, the flip portion 44 does not contact the diaphragm 30. When the flipping portion 44 is further displaced downward, the rear end of the refracting portion 51b comes into contact with the upper limit stopper 43 as shown in FIG. Then, the refraction part 51b is rotated clockwise in FIG. 21 with respect to the base part 51a. At this time, the angle regulating member 182 moves to the first recess 191b against the urging force of the leaf spring 183. Accordingly, as shown in FIG. 21A, the angle between the refracting portion 51b and the base portion 51a is restricted to the first angle (FIG. 20A). Further, the rocking of the key 10 is stopped in conjunction with the rocking lever 51, and the key 10 returns to the original position (the position shown in FIG. 21A).

  Also in the keyboard musical instrument according to the seventh embodiment configured as described above, the diaphragm 30 can be played and sounded by the playing unit 44 assembled to the refraction unit 51b interlocked with the key pressing operation of the key 10. When the key is released, the refracting portion 51b is restricted to the second angle (FIG. 20B), so that the distance from the rotation center of the swing lever 51 to the tip of the playing portion 44 is reduced, and the playing portion 44 vibrates. Since the route away from the plate 30 is taken, no noise is generated when the key is released. Further, since the structure is simple, the instrument body can be reduced in size and weight. Furthermore, since there is no portion that changes or deteriorates over time, it is not necessary to regularly tune and adjust the instrument.

h. Eighth Embodiment The keyboard instrument according to each embodiment described above may be provided with an automatic performance mechanism in addition to the respective configurations.

  FIG. 22 is a diagram in which an automatic performance mechanism is added to the keyboard instrument according to the second embodiment. An actuator support base 221 is fixed to the frame FR below the rear part of each key 10. An actuator 220 is fixed to the actuator support base 221, and the drive rod 222 is in contact with the rear lower surface of the key 10. As the actuator 220, various actuators (for example, solenoids) can be used as long as they can be electrically driven and controlled. However, a giant magnetostrictive element that can obtain a relatively large driving force even at low power and has a fast response speed is used. It is preferable to use a conventional electric actuator. The control circuit 223 includes a microcomputer composed of a CPU, ROM, RAM, and the like, and a drive circuit that outputs a drive signal to the actuator 220 in accordance with instructions from the microcomputer.

  Next, the operation of the automatic performance mechanism configured as described above will be described. An actuator drive signal is generated in the control circuit based on performance data recorded in advance in a ROM or the like. The generated drive signal is supplied from the control circuit 223 to the actuator 220, and the actuator 220 is driven. The drive rod 222 is displaced in the vertical direction in the figure to swing the key 10 and the playing portion 44, so that the diaphragm 30 can be replayed. The vibration of the diaphragm 30 is amplified by the resonator 31, and the key pitch is increased. The instrument sound corresponding to

  Similarly, FIG. 23 shows an example in which the actuator 220 is applied to a keyboard instrument according to the third embodiment. In this case, the actuator 220 is disposed below the rear portion of the swing lever 51. Other configurations are the same as those applied to the keyboard instrument according to the second embodiment. Similarly, the present invention can be applied to other embodiments.

i. Ninth Embodiment The keyboard instrument according to each embodiment described above may further include a mechanism for suppressing vibration of the diaphragm 30 in addition to the respective configurations.

  FIG. 24 is a diagram in which a vibration suppression mechanism is added to the keyboard instrument according to the third embodiment. Below the diaphragm 30, an operating element 240 (for example, a pedal) is supported by an operating element support portion 241 fixed to the frame FR so as to be rotatable about the axis of the pin. A leaf spring 243 is fixed to the frame FR below the front portion of the operation element 240 and urges the front part of the operation element 240 upward. An operator lower limit stopper 243 that restricts the downward displacement of the operator 240 is fixed to the frame FR below the front portion of the operator 240. One end of the drive rod 244 is fixed to the rear portion of the operation element 240. The drive rod 244 is a long member and extends toward the upper diaphragm 30. A vibration suppressing member 245 made of felt or the like is attached to the upper end of the drive rod 244 so as to face the vibration plate 30.

  Next, the operation of the vibration suppression mechanism of the diaphragm 30 configured as described above will be described. In a state where the operator 240 is not operated, the vibration suppressing member 245 is separated from the diaphragm 30. When the front portion of the operation element 240 is pushed downward against the urging force of the leaf spring 242, the operation element 240 rotates counterclockwise in FIG. 24 about the rotation center of the operation element support portion 241. Then, the drive rod 244 is displaced upward, and the vibration suppression member 245 comes into contact with the vibration plate 30 to suppress vibration of the vibration plate 30. At this time, the front lower surface of the operating element 240 contacts the operating element lower limit stopper 243, so that the upward displacement amount of the vibration suppressing member 245 is also limited. Thereby, the diaphragm suppressing member 245 does not press the diaphragm 30 more than necessary, and the diaphragm 30 is not damaged. When the operation of the operation element 240 is released, the urging force of the leaf spring 242 pushes the front part of the operation element 240 upward, and the operation element 240 is centered on the rotation center of the operation element support portion 241 in FIG. Rotate around. The drive rod 245 is displaced downward, the vibration suppressing member 245 is separated from the diaphragm 30, and returns to the original state (FIG. 24).

  In the keyboard musical instrument configured as described above, the vibration of the diaphragm 30 can be suppressed and the sound can be turned off by operating the operator 240 before the vibration of the diaphragm 30 is naturally attenuated and the sound disappears. So you can control the length of the sound while playing.

  In the keyboard musical instrument according to the ninth embodiment, the vibration suppressing member 245 is brought into contact with the diaphragm 30, but instead, it is brought into contact with the resonator 31 as shown in FIG. It may be. Even with a keyboard instrument configured in this way, the length of the sound can be adjusted during performance.

j. Tenth Embodiment The keyboard instrument according to the above-described embodiments may further include a mechanism for changing the excitation force by changing the relative positions of the diaphragm 30 and the playing portion 44 in addition to the respective configurations.

  FIG. 26 is a diagram in which an excitation force changing mechanism is added to the keyboard instrument according to the third embodiment. Below the swing lever 51, an operating element 240 (for example, a pedal) is fixed to an operating element support portion 241 fixed to the frame FR so as to be rotatable around the axis of the pin. A leaf spring 242 is fixed to the frame FR below the front portion of the operation element 240 and urges the front part of the operation element 240 upward. An operator lower limit stopper 243 that restricts the downward displacement of the operator 240 is fixed to the frame FR below the front portion of the operator 240. One end of the drive rod 244 is rotatably supported by the intermediate part of the operation element. The drive rod 244 is a long member and extends toward the upper swing lever support portion 260. The other end of the drive rod 244 is rotatably connected to the lower surface of the swing lever support 260. The swing lever support 260 is movable within a certain range in the vertical direction within a support guide 261 fixed to the frame FR. The swing lever 51 is supported on the swing lever support 260 in the same manner as in the third embodiment. FIG. 27 shows an enlarged perspective view of the swing lever support 260.

  Next, the operation of the excitation force changing mechanism configured as described above will be described. In a state where the operation element 240 is not operated, the swing lever support portion 260 is located at the uppermost position in the support guide 261. That is, in the key release state, the distance between the playing portion 44 and the diaphragm 30 is the smallest. On the other hand, when the front portion of the operation element 240 is pushed downward against the urging force of the leaf spring 242, the operation element 240 rotates counterclockwise in FIG. 26 about the rotation center of the operation element support portion 241. Then, the drive rod 244 is displaced downward, and the swing lever support portion 260 is displaced downward. Thereby, in the key release state, the distance between the playing portion 44 and the diaphragm 30 is increased. At this time, the movement range of the swing lever support portion 260 is limited by the support guide 261, and the flip portion 44 and the diaphragm 30 are not separated more than necessary. Therefore, the diaphragm 30 can be always played when the key is depressed.

  When the operation of the operation element 240 is released, the front part of the operation element 240 is pushed upward by the urging force of the leaf spring 242, and the operation element 240 is centered on the rotation center of the operation element support 241 in FIG. Rotate around. The drive rod 244 is displaced upward, and the swing lever 51 returns to the original position (position in FIG. 26).

  In the keyboard musical instrument configured as described above, the distance between the diaphragm 30 and the playing unit 44 can be changed by operating the operator 240. As a result, the amount of the playing unit 44 applied to the diaphragm 30 when the playing unit 44 plays the diaphragm 30 can be adjusted, and the tone color and volume can be changed. Specifically, when the key depression operation is performed without operating the operation element 240, the diaphragm 30 is strongly struck and the volume of the generated musical sound increases. When the key is pressed while the operation element 240 is operated, the diaphragm 30 is played weaker than the above, and the volume of the generated musical sound is reduced. In these two states, since the vibration of the diaphragm 30 is slightly changed, the tone color of the generated musical tone is also slightly changed.

  In the keyboard instrument according to the tenth embodiment, the support member 52 of the swing lever 51 is moved up and down, but it may be moved back and forth. Further, the diaphragm 30 may be moved.

It is a top view which shows the external appearance of the keyboard musical instrument which concerns on the 1st thru | or 10th embodiment of this invention. (A) And (B) concerns on 1st Embodiment of this invention, It is a side view which shows about the state in which the key is released and the state where the key is pressed down about one key. It is a top view explaining the structure of a diaphragm and a resonator. FIG. 10 is a side view illustrating a single key by vertically cutting a state in which the key is released according to the second embodiment of the present invention. It is a side view concerning a 3rd embodiment of the present invention, and shows the state where the key is released vertically about one key. FIG. 10 is a side view illustrating a single key by vertically cutting a state where a key is released according to a fourth embodiment of the present invention. It is a side view explaining the arm structure of FIG. (A) And (B) is the top view and side view explaining the positional relationship of the arm of FIG. 6, and a rotation nail | claw. (A)-(C) are the figures explaining the structure of a rotation nail | claw. (A) And (B) is a side view explaining the positional relationship of the 1st drive part at the time of key release, a 2nd drive part, and a rotation nail | claw. (A) And (B) is a side view explaining the positional relationship of the 1st drive part in the middle of key pressing, the 2nd drive part, and a rotation nail | claw. (A) And (B) is a side view explaining the positional relationship of the 1st drive part and 2nd drive part at the time of a key press completion | finish, and a rotation nail | claw. (A) And (B) is a side view explaining the positional relationship of the 1st drive part in the middle of a key release, a 2nd drive part, and a rotation nail | claw. FIG. 20 is a side view illustrating one key in a longitudinal manner in a state where the key is released according to the fifth embodiment of the present invention. (A) And (B) is a figure explaining operation of a reverse rotation prevention mechanism. FIG. 20 is a side view illustrating one key in a longitudinal manner in a state where the key is released according to the sixth embodiment of the present invention. (A) And (B) is the front view and side view explaining the structure of a cam. It is a side view concerning a 7th embodiment of the present invention, and shows the state where a key is released vertically about one key. It is a figure explaining the structure of a refractive part. (A) And (B) is a figure explaining an angle control mechanism. (A)-(D) is a figure explaining operation | movement of the rocking lever at the time of key operation. FIG. 20 is a side view illustrating one key in a longitudinal manner in a state where the key is released according to the eighth embodiment of the present invention. It is a side view concerning a modification of an 8th embodiment of the present invention, and shows the state where the key is released vertically about one key. FIG. 25 is a side view illustrating a single key by vertically cutting a state in which the key is released according to the ninth embodiment of the present invention. FIG. 29 is a side view showing one key in a longitudinal manner in a state where the key is released according to a modification of the ninth embodiment of the present invention. FIG. 29 is a side view illustrating one key in a longitudinal manner in a state where the key is released according to the tenth embodiment of the present invention. It is a figure explaining the rocking lever support part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Key, 20 ... Key support part (support member) 22 ... Lower limit stopper, 23 ... Hammer drive part, 24 ... Hammer, 26 ... Mass body (striking member) 28 ... Hammer stopper part, 30 ... Vibration plate (cantilever vibration) Plate), 31 ... resonator, 32 ... resonator support, 42, 54, 183, 242 ... plate spring, 43 ... upper limit stopper, 44 ... repelling unit, 50 ... oscillation lever drive unit, 51 ... oscillation lever ( Key interlocking member), 51a ... base, 51b ... refracting part, 61 ... arm, 63 ... first driving part, 64 ... second driving part, 67 ... arm stopper, 90 ... rotating claw (playing member), 91 ... main body part 95, first driven portion, 96, second driven portion, 141, cam (swing restricting member), 143, reverse rotation prevention mechanism, 144, pressing member, 146, pressing member guide, 160, cam, 163 ... Driving arm (link mechanism), 182 Angle restricting member (angle restricting mechanism), 220 ... actuator, 222,244 ... drive rod, 223 ... control circuit, 240 ... operator, 245 ... vibration suppressing member (damping member), 243 ... operator lower limit stopper, 260 ... Swing lever support part, 261 ... support guide FR ... frame

Claims (13)

A keyboard consisting of multiple keys,
A plurality of cantilever diaphragms provided corresponding to a plurality of keys, supported by a support member, having a free end capable of vibration, and vibrating at a frequency corresponding to the key pitch of the key;
A keyboard instrument characterized by comprising a plurality of excitation mechanisms provided corresponding to a plurality of keys and exciting each of the plurality of cantilever diaphragms in conjunction with a key pressing operation of the keys.   The keyboard instrument according to claim 1, wherein the excitation mechanism includes a striking member that strikes a free end side of the cantilever diaphragm.   The keyboard instrument according to claim 1, wherein the excitation mechanism includes a replay member that repels a free end side of the cantilever diaphragm. The flip member includes a main body portion rotatably supported and an outer peripheral portion of the main body portion, and includes one or a plurality of flip portions that flip the cantilever diaphragm by the rotation of the main body portion,
The excitation mechanism includes an arm that rotates the main body portion by a predetermined angle in a predetermined direction when the key is depressed, and rotates the main body portion by a predetermined angle in the same direction as the predetermined direction when the key is released. The keyboard instrument according to claim 3, further comprising: The flipping member is provided at one end of the key interlocking member that swings when the key is pressed / released and interlocks with the key, and the cantilever diaphragm by the swing of the key interlocking member With a playing part
The excitation mechanism is further rotatably supported and supports the key interlocking member so that the key interlocking member can swing, and moves one end of the key interlocking member to the cantilever diaphragm side when pressing the key. And a rocking restricting member for restricting the rocking of the key interlocking member so as to move one end of the key interlocking member to the side opposite to the cantilever diaphragm during the key release operation of the key. The keyboard instrument according to claim 3, wherein   The swing restricting member includes a cam that is rotatably supported and is eccentrically coupled to the key interlocking member, and further includes a reverse rotation prevention mechanism that prevents reverse rotation of the cam on the outer periphery of the cam. The keyboard instrument according to claim 5, wherein the keyboard instrument is provided. The flip member is provided with a key interlocking member that is swingably supported, and a flip portion that is provided at one end of the key interlock member and flips the cantilever diaphragm by swinging of the key interlock member,
The excitation mechanism is further rotatably supported, and connects the key and the key interlocking member to swing the key interlocking member during the key pressing / releasing key operation. A link mechanism that sometimes moves one end of the key interlocking member to the cantilever diaphragm side and moves one end of the key interlocking member to the opposite side of the cantilever diaphragm when the key is released. The keyboard instrument according to claim 3, wherein:   The link mechanism includes a cam that is rotatably supported and has an eccentric coupling with the key interlocking member, and further includes a reverse rotation prevention mechanism that prevents reverse rotation of the cam on the outer periphery of the cam. The keyboard instrument according to claim 7. The excitation mechanism includes a key interlocking member that swings in conjunction with a key pressing / releasing key operation,
The flip member is further supported to be swingable with respect to the key interlocking member, and has a flip portion that flips the cantilever diaphragm at one end,
Restricting the angle of the flip member with respect to the key interlocking member so that one end of the flip member contacts the cantilever diaphragm by the swing of the key interlocking member during the key pressing operation of the key; and
An angle regulating mechanism that regulates an angle of the flipping member with respect to the key interlocking member so that one end of the flipping member does not come into contact with the cantilever diaphragm even when the key interlocking member swings during the key release operation. The keyboard instrument according to claim 3, further comprising:   The resonating body further supports a fixed end of the plurality of cantilever diaphragms and resonates with vibration of the cantilever diaphragm, and the resonance body is supported by the support member. The keyboard instrument according to any one of 1 to 9. An operator operated by the user;
The vibration control member according to any one of claims 1 to 10, further comprising a damping member that contacts the cantilever diaphragm and suppresses vibration of the cantilever diaphragm in response to an operation of the operation element. Keyboard instrument. An operator operated by the user;
11. The vibration control member according to claim 1, further comprising: a damping member that contacts the one or more resonators and suppresses vibration of the one or more resonators according to an operation of the operation element. The keyboard instrument described in one. An operator operated by the user;
Excitation force changing means for changing the excitation force applied to the plurality of cantilever diaphragms by changing the relative positions of the plurality of excitation members and the plurality of cantilever diaphragms according to the operation of the operator. The keyboard instrument according to any one of claims 1 to 12, further comprising:

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