JP6511903B2 - Support assembly and keyboard device - Google Patents

Support assembly and keyboard device Download PDF

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Publication number
JP6511903B2
JP6511903B2 JP2015063331A JP2015063331A JP6511903B2 JP 6511903 B2 JP6511903 B2 JP 6511903B2 JP 2015063331 A JP2015063331 A JP 2015063331A JP 2015063331 A JP2015063331 A JP 2015063331A JP 6511903 B2 JP6511903 B2 JP 6511903B2
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support
flexible
support assembly
repetition lever
jack
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JP2016184040A (en
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成泰 谷口
成泰 谷口
佐藤 剛
剛 佐藤
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ヤマハ株式会社
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Description

  The present invention relates to a support assembly for use with a keyboard device.

  Conventional acoustic pianos, such as grand pianos and upright pianos, are composed of many parts. Also, the assembly of these parts is very complicated, which increases the time taken for the assembly operation. In particular, the action mechanism provided corresponding to each key requires many parts, and its assembling operation is also very complicated.

  For example, in the action mechanism shown in Patent Document 1, a plurality of parts work with each other to transmit the key operation by key pressing and key releasing to the hammer. In particular, the support assembly, which forms part of the action mechanism, operates in combination with various parts. The support assembly includes not only a mechanism for realizing hammer strokes in response to key depression, but also an escapement mechanism for releasing the force transmitted to the hammer by the operation of the key immediately before the strike. This mechanism is an important mechanism to realize the basic operation of the acoustic piano. In particular, in the grand piano, a double escapement mechanism combining a repetition lever and a jack is generally employed.

  The action of the action mechanism gives a sense (hereinafter referred to as a touch sense) to the player's finger through the key. In particular, the configuration of the support assembly has an important effect on touch. For example, the touch feeling by the operation of the escapement mechanism is called let-off.

Unexamined-Japanese-Patent No. 2005-292361

  The large number of parts that make up the support assembly lengthens the manufacturing period and increases the manufacturing cost. Therefore, in order to reduce the manufacturing cost, it is desired to simply reduce the number of parts or simplify the structure. However, when the configuration of the support assembly is changed, the touch feeling at the time of key operation changes significantly. Therefore, it is difficult to reduce the cost of producing an acoustic piano.

  One of the objects of the present invention is to reduce the manufacturing cost of the support assembly while suppressing the change in touch feeling at the time of key operation as compared to the keyboard device of an acoustic piano.

  A support assembly according to an embodiment of the present invention, wherein the support assembly is provided between the support, a repetition lever rotatably disposed on the support, and a fixing portion for rotatably fixing the support to the frame and the support And a flexible first flexible portion.

  The first flexible portion may be integrally formed with the support.

  In the direction in which the frame extends, the width of the first flexible portion may be greater than the width of the support.

  It may further include a second flexible portion provided between the repetition lever and the support and having flexibility.

  The second flexible portion may be integrally formed with the repetition lever.

  The first flexible portion, the second flexible portion, the support and the repetition lever may be integrally formed.

  The second flexible portion may further include an operation restricting portion provided on the opposite side to the first flexible portion with reference to the second flexible portion, and restricting upward rotation of the repetition lever.

  The repetition lever may have a first extending portion connected to the support side of the repetition lever, and the first extending portion may be in contact with the movement restricting portion from below.

  According to one embodiment of the present invention, compared to an acoustic piano keyboard device, the acoustic piano keyboard device reduces the manufacturing cost of the support assembly while suppressing the change in touch feeling at the time of key operation. be able to.

It is a side view showing composition of a keyboard device concerning one embodiment of the present invention. It is a perspective view showing composition of a support assembly concerning one embodiment of the present invention. It is a side view showing composition of a support assembly concerning one embodiment of the present invention. It is a side view showing the composition of the stopper of the support assembly concerning one embodiment of the present invention, and a guide. It is a top view which shows the structure of the support assembly which concerns on one Embodiment of this invention. It is a perspective view showing composition of a support assembly concerning one embodiment of the present invention. It is a side view showing composition of a support assembly concerning one embodiment of the present invention. FIG. 8 is a side view showing the support assembly shown in FIGS. 3 and 7 attached to a support rail. It is a side view for explaining movement of a support assembly concerning one embodiment of the present invention. It is a block diagram which shows the structure of the sound-generation mechanism of the keyboard apparatus which concerns on one Embodiment of this invention. It is a top view which shows the structure of the support assembly which concerns on the modification of one Embodiment of this invention. It is a top view which shows the structure of the support assembly which concerns on the modification of one Embodiment of this invention. It is a side view showing composition of a support assembly concerning one embodiment of the present invention.

  Hereinafter, a support assembly used in the keyboard device according to the present invention will be described with reference to the drawings. However, the support assembly of the present invention can be implemented in many different modes, and is not construed as being limited to the description of the embodiments shown below. Note that in the drawings referred to in this embodiment, the same portions or portions having similar functions are denoted by the same reference numerals, and the description thereof will not be repeated.

  In the following description, the player side of the keyboard device is referred to as the player's side, and the opposite side is referred to as the player's back side. Further, terms that indicate the orientation of the upper side, the lower side, the side, etc. are defined as the direction when the keyboard device is viewed from the player side. The slit provided in each component may be a through hole penetrating the component, and for example, it may have a shape such as a U-shape in which a part is opened.

First Embodiment
[Configuration of Keyboard Device 1]
The keyboard device 1 in the first embodiment of the present invention is an example in which an example of the support assembly according to the present invention is applied to an electronic piano. This electronic piano has a configuration close to a support assembly provided in the grand piano in order to obtain a touch feeling close to that of the grand piano when the key is operated. The outline of the keyboard device 1 according to the first embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a side view showing a mechanical configuration of a keyboard device according to an embodiment of the present invention. As shown in FIG. 1, the keyboard device 1 according to the first embodiment of the present invention includes an action mechanism corresponding to each of a plurality of keys 110 (88 keys in this example) and the keys 110. The action mechanism comprises a support assembly 60, a hammer shank 310, a hammer 320 and a hammer stop 410. Although FIG. 1 shows the case where the key 110 is a white key, the same applies to a black key. Further, in the following description, terms representing the direction of the player such as the player's front side, the player's back side, the upper side, the lower side, the side, etc. are defined as the direction when the keyboard device is viewed from the player side. For example, in the example of FIG. 1, the support assembly 60 is disposed on the near side of the player when viewed from the hammer 320 and is disposed above the key 110. The side corresponds to the direction in which the keys 110 are arranged.

  The key 110 is rotatably supported by the balance rail 910. The key 110 pivots in the range from the rest position to the end position shown in FIG. The key 110 is provided with a capstan screw 120. The support assembly 60 is pivotally connected to the support rail 960 and rests on the capstan screw 120. The support rail 960 is supported by the bracket 900. The detailed configuration of the support assembly 60 will be described later. The support rail 960 is an example of a frame serving as a reference of rotation of the support assembly 60. The frame may be formed of one member as the support rail 960, or may be formed of a plurality of members. The frame may be a rail-like member having a length in the arrangement direction of the keys 110 like the support rail 960, or may be an independent member for each key 110.

  The hammer shank 310 is rotatably connected to the shank flange 390. The hammer shank 310 is provided with a hammer roller 315. The hammer shank 310 is mounted on the support assembly 60 via the hammer roller 315. The shank flange 390 is fixed to the shank rail 930. The hammer 320 is fixed to the end of the hammer shank 310. The shank flange 390 is provided with a repetition regulating screw 346 that restricts the upward (hammer shank 330) rotation of the support assembly 60. The regulating button 360 is fixed to the shank rail 930. The hammer stopper 410 is fixed to the hammer stopper rail 940 and arranged at a position for restricting the rotation of the hammer shank 310.

  The sensor 510 is a sensor for measuring the position and moving speed of the hammer shank 310 (in particular, the speed immediately before the hammer shank 310 collides with the hammer stopper 410). The sensor 510 is fixed to the sensor rail 950. In this example, sensor 510 is a photo interrupter. The output value from the sensor 510 changes in accordance with the amount by which the shielding plate 520 fixed to the hammer shank 310 shields the optical axis of the photo interrupter. Based on this output value, the position and moving speed of the hammer shank 310 can be measured. A sensor for measuring the operation state of the key 110 may be provided instead of the sensor 510 or together with the sensor 510.

  The support rail 960, the shank rail 930, the hammer stopper rail 940 and the sensor rail 950 described above are supported by the bracket 900.

[Configuration of support assembly 60]
FIG. 2 is a perspective view showing a mechanical configuration of a support assembly according to an embodiment of the present invention. FIG. 3 is a side view showing a mechanical configuration of a support assembly and a support rail according to an embodiment of the present invention. The support assembly 60 of the keyboard device 1 includes a support 610, a repetition lever 640, a jack 650, a movement restricting portion 660, and a coil spring 680. The support assembly 60 is a resin structure manufactured by injection molding or the like except for a non-buffer material (non-woven fabric, elastic body, etc.) provided at a portion that collides with the coil spring 680 and other members.

  The support 610 is rotatably supported relative to the support rail 960. The repetition lever 640 is rotatably supported by the support 610. The jack 650 is rotatably disposed on the support 610. Also, the jack 650 has a large jack 6502 and a small jack 6504. The large jack 6502 is arranged to be able to penetrate the slit 642 provided in the repetition lever 640, and the small jack 6504 is the player's front side from the support 610 It extends to The movement restricting portion 660 is disposed on the side of the repetition lever 640 of the support 610.

  Further, the support 610 includes a support heel 612, a frame fixing portion 632, a flexible portion 634 (first flexible portion), and a pedestal 638. The frame fixing portion 632 fixes the support 610 to the support rail 960. The flexible portion 634 is provided between the support 610 and the frame fixing portion 632 of each support assembly 60, and has flexibility (elasticity). In addition, the flexible portion 634 is integrally formed with the support 610 and the frame fixing portion 632, and the plate thickness is thinner than at least the support 610 in the rotational direction of the support assembly 60 or the plate thickness direction of the flexible portion 634. Although FIGS. 2 and 3 illustrate the structure in which the support 610, the frame fixing portion 632, and the flexible portion 634 are integrally formed, the present invention is not limited to this structure. For example, the flexible portion 634 may be fixed to the support 610 and / or the frame fixing portion 632 by a fixing tool, an adhesive, or welding. Here, the flexible portion 634 is the center of rotation of the support assembly 60.

  Here, the flexible portion 634 has a second thickness portion 6344 thinner than the first thickness portion 6342 and the first thickness portion 6342 (see FIG. 3). A stepped portion between the first thick portion 6342 and the second thick portion 6344 and a stepped portion between the frame fixing portion 632 and the second thick portion 6344 have a curved surface 6346. Curved surface 6346 relieves stress concentration when flexible portion 634 is bent by pivoting of support assembly 60. In addition, although the flexible part 634 illustrated the structure which has the 1st board thick part 6342 and the 2nd board thick part 6344 which differ in board thickness in FIG. 3, it is not limited to this structure. The flexible portion 634 may be formed to a constant thickness if it has sufficient flexibility when the support assembly 60 pivots.

  The pedestal 638 is connected to the repetition lever 640 side of the support 610, and a coil spring 682 acting on the pedestal 638 and the repetition lever 640 is provided on the upper surface (the repetition lever 640 side) of the pedestal 638. The coil spring 682 is a compression spring that acts on the pedestal 638 and the repetition lever 640 in a direction in which the pedestal 638 and the repetition lever 640 move away from each other, and functions as an elastic body that imparts turning power to the repetition lever 640.

  The repetition lever 640 has a flexible portion 620 (second flexible portion), a slit 642, an extending portion 644, and a support fixing portion 648.

  The flexible portion 620 extends on the support 610 side of the repetition lever 640 and is coupled to the support fixing portion 648. That is, the flexible portion 620 is provided between the repetition lever 640 and the support fixing portion 648. Although the flexible portion 620 is integrally formed with the support fixing portion 648 and the repetition lever 640, since the thickness of the flexible portion 620 is thinner than the thickness of the repetition lever 640, the flexible portion 620 is flexible (elastic) )have. Therefore, the repetition lever 640 pivots about the flexible portion 620.

  The slit 642 is provided at a position where the large jack 6502 can be penetrated from the flexible portion 620 which is the rotation center of the repetition lever 640 to a part on the player's side. The extension portion 644 is coupled to the support 610 side of the repetition lever 640 on the jack 650 side from the flexible portion 620 which is the rotation center of the repetition lever 640. Further, the extension portion 644 has slits 6442 and 6444 (see FIG. 3). The support fixing portion 648 is fixed to the support 610 by a fixing device 674.

  In addition, although the structure in which the repetition lever 640, the flexible part 620, and the support fixing part 648 were integrally formed was illustrated in FIG.2 and FIG.3, it is not limited to this structure. For example, the flexible portion 620 may be fixed to the repetition lever 640 and / or the support fixing portion 648 by a fixing tool, an adhesive or welding.

  The jack 650 is rotatably disposed relative to the support 610 at the jack support 6105 between the large and small jacks 6502 and 6504 (see FIG. 3). In part of the jack size 6502, a coil spring 684 acting on the jack size 6502 and the support 610 is provided. The coil spring 684 is a tension spring acting as an elastic body that acts on the jack 650 and the support 610 in a direction in which the jack 652 approaches the pedestal 638 and gives the jack 650 a rotational force.

  The movement restricting portion 660 is provided on the opposite side of the flexible portion 634 with respect to the flexible portion 620. In addition, the operation restricting portion 660 includes an extending portion 662, a stopper 664, and a guide 666. The extending portion 662 is disposed on the side of the repetition lever 640 of the support 610. The stopper 664 and the guide 666 are disposed in the extending portion 662 and extend from the extending portion 662 to the player's side. In other words, it can be said that the stopper 664 and the guide 666 are protrusions projecting from the extension portion 662 toward the player's side. The stopper 664 passes through a slit 6442 provided in the extension portion 644, and the guide 666 passes through a slit 6444 provided in the extension portion 644. The slits 6442 and 6444 may have any shape as long as the stopper 664 and the guide 666 can be locked. For example, the slits 6442 and 6444 may have a groove provided with the stopper 664 and the guide 666. The slits 6442 and 6444 can also be referred to as locking portions.

  Here, FIGS. 2 and 3 illustrate the structure in which the support 610 and the repetition lever 640 prepared as separate parts are fixed by the fixture 674, but the present invention is not limited to this structure. For example, the support 610 and the repetition lever 640 may be integrally formed. That is, the support 610, the flexible portions 620 and 634, and the repetition lever 640 may be integrally formed.

  FIG. 4 is a side view showing the configuration of the stoppers and guides of the support assembly according to one embodiment of the present invention. The side view shown in FIG. 4 is a view showing only the extending portion 644, the stopper 664, and the guide 666 among the side views seen in the D1 direction in FIGS. 4A shows a side view of the rest position, and FIG. 4B shows a side view of the end position. The stopper 664 has a length in a direction intersecting the rotational direction of the repetition lever 640 and the extension portion 644. Further, the guide 666 and the slit 6444 have a longitudinal direction in the rotational direction of the repetition lever 640 and the extension portion 644. The guide 666 has a groove V6 with respect to the inner wall of the slit 6444, and the area of sliding contact between the guide 666 and the slit 6444 is reduced. You may apply grease to said groove part V6.

  Here, in the rest position shown in FIGS. 3 and 4, the extension portion 644 is in contact with the stopper 664 from the support 610 side (downward) of the stopper 664 in the slit 6442. In other words, the extension portion 644 is in contact with the operation restricting portion 660 from the lower side of the operation restricting portion 660. That is, the stopper 664 or the movement restricting portion 660 restricts the rotation of the repetition lever 640 and the extending portion 644 to the hammer shank 310 side (upper side). Even if a shock absorbing material or the like (non-woven fabric, elastic body, etc.) is provided between the extension portion 644 and the stopper 664 to reduce noise generated by contact between the extension portion 644 and the stopper 664. Good.

  Further, the extension portion 644 is in contact with the guide 666 from the side at the slit 6444. Here, the side is the direction in which the support assembly 60 is adjacent, or the extension direction of the support rail 960. In other words, the extending portion 644 is in contact with the operation restricting portion 660 from the side. That is, the guide 666 or the movement restricting portion 660 suppresses the yawing (rolling) and rolling (twist) of the repetition lever 640. Grease may be applied between the extension portion 644 and the guide 666 in order to facilitate sliding of the extension portion 644 and the guide 666.

  In the support assembly 60 of the first embodiment, the extending portion 644 connected to the repetition lever 640 is provided with a slit, and the extending portion 662 connected to the support 610 is provided with a projecting portion. However, it is not limited to this configuration. For example, the extension portion 662 may be provided with a slit, and the extension portion 644 may be configured as a protrusion penetrating the slit.

  FIG. 5 is a top view showing a mechanical configuration of a support assembly according to an embodiment of the present invention. The top view shown in FIG. 5 is a top view seen in the D2 direction in FIGS. 2 and 3. The width L1 of the frame fixing portion 632 is larger than the width L2 of the support 610 in the direction in which the support rail 960 extends (that is, the direction in which the frame extends). Specifically, the width L 1 of the frame fixing portion 632 is designed to be twice the width L 2 of the support 610. Preferably, the width L1 should satisfy the following equation: L1 = 2 × L2 + d (d is an interval between adjacent supports 610 and 610A). The width L 1 of the frame fixing portion 632 may be designed to be an integral multiple of the width L 2 of the support 610. Preferably, the width L1 should satisfy the following equation: L1 = n × L2 + (n−1) d (n is a positive integer). Further, in the support assembly 60 according to the first embodiment, the configuration in which the width of the support 610 and the width of the repetition lever 640 are the same is exemplified, but not limited to this configuration, even if both have different widths. Good.

  The frame fixing portion 632 is provided with a fixing hole 672 by which the frame fixing portion 632 can be attached to the support rail 960. The fixing hole 672 is provided at the center of the frame fixing portion 632 in the extension direction of the support rail 960. However, the position where the fixing hole 672 is provided is not limited to the center of the frame fixing portion 632.

[Support assembly 60A adjacent to support assembly 60]
Next, the support assembly 60A provided adjacent to the support assembly 60 will be described. FIG. 6 is a perspective view showing a mechanical configuration of a support assembly according to an embodiment of the present invention. FIG. 7 is a side view showing a mechanical configuration of a support assembly according to an embodiment of the present invention. The support assembly 60A shown in FIGS. 6 and 7 is similar to the support assembly 60 shown in FIGS. 2 and 3, but the connection position of the flexible portion 634A to the support 610A, the flexible portion 634A and the frame fixing portion The support assembly 60A differs from the support assembly 60 in the shape of 632A.

  The position where the flexible portion 634A of the support assembly 60A is connected to the frame fixing portion 632A in the extension direction of the support rail 960 is different from the position where the flexible portion 634 of the support assembly 60 is connected to the frame fixing portion 632 . Here, in the extension direction of the support rail 960, the width L3 of the frame fixing portion 632A of the support assembly 60A is the same as the width L1 of the frame fixing portion 632 of the support assembly 60 and is twice the width of the support 610A. Designed. Preferably, the width L3 should satisfy the equation L3 = 2 × L2 + d. Similar to the support assembly 60, the width L3 of the frame fixing portion 632A may be designed to be an integral multiple of the width of the support 610A. Preferably, the width L3 should satisfy the equation L3 = n × L2 + (n-1) d.

  Also, as shown in FIG. 7, in the pivoting direction of the support 610A, the position (height) at which the flexible portion 634A of the support assembly 60A is connected to the support 610A corresponds to the support 610 of the flexible portion 634 of the support assembly 60. It is different from the position (height) connected to. Specifically, the flexible portion 634 of the support assembly 60 is connected to the side of the repetition lever 640 side (upper side) of the support 610, and the flexible portion 634A of the support assembly 60A is the key 110 side (lower side) of the support 610A. Connected to the side of the side).

  Fixing of the support assemblies 60, 60A to the support rails 960 is performed as follows. First, the support assembly 60A is fixed to the support rail 960 by fitting the recess 6322A of the support assembly 60A to the projection 9602 of the support rail 960 (see FIG. 7). Subsequently, the support assembly 60 is fixed to the support assembly 60A by fitting the recess 6322 (see FIG. 3) of the support assembly 60 to the projection 6324A of the support assembly 60A.

  The state where the support assembly 60 and the support assembly 60A are fixed to the support rail 960 as described above is shown in FIG. The frame fixing portion 632 and the flexible portion 634, and the frame fixing portion 632A and the flexible portion 634A are provided at different positions in the vertical direction. That is, the heights of the pivot centers of the adjacent support assemblies 60 and 60A are different. However, since the position where the flexible portion 634 is connected to the support 610 and the position where the flexible portion 634A is connected to the support 610A are different as described above, the heights of the support 610 and the support 610A from the key 110 are the same. It is. Also, the support assemblies 60 and 60A are fixed to the support rail 960 via fixing holes 672 and 672A. That is, the positions of the fixing holes 672 and 672A are provided so as to be at the same position when fixed to the support rail 960.

  Here, due to the width relationship between the support assembly and the frame fixing portion, the frame fixing portions 632 and 632A can be aligned and attached to the support rail 960 when the support assemblies 60 and 60A are attached.

[Operation of support assembly 60]
Subsequently, the movement of the support assembly 60 will be described when the key 110 is pressed from the state of rest (FIG. 1) to the end position.

  FIG. 9 is a side view for explaining the movement of the support assembly in the first embodiment of the present invention. When the key 110 is pressed to the end position, the capstan screw 120 pushes up the support heel 612 to pivot the support 610 about the axis of the flexible portion 634. When the support 610 pivots and moves upward, the large jack 6502 pushes up the hammer roller 315, and the hammer shank 310 collides with the hammer stopper 410. In the case of a general grand piano, this collision corresponds to a hammer stroke.

  Just before the hammer shank 310 collides with the hammer stopper 410, the support button 610 (jack support 6105) is further raised while the upward movement of the small jack 6504 is restricted by the regulating button 360. Therefore, the large jack 6502 pivots so as to separate from the hammer roller 315. At this time, the repetition regulating screw 346 regulates the upward movement of the repetition lever 640. Thereby, the repetition lever 640 is pivoted so as to approach the support 610 while the upward movement is restricted. By these operations, a double escapement mechanism is realized. FIG. 9 shows this state. When the key 110 is returned to the rest position, the hammer roller 315 is supported by the repetition lever 640, and the jack size 6502 returns below the hammer roller 315.

  As described above, according to the support assembly 60 according to the first embodiment of the present invention, the number of parts constituting the support assembly can be reduced while securing the operation of the support assembly equivalent to the conventional one. Therefore, since double escapement is realized in a configuration easier than a support assembly used for a general grand piano, it is possible to reduce the manufacturing cost while suppressing the influence on touch feeling.

  In addition, since the flexible portion 634 and the support 610, the flexible portion 620 and the repetition lever 640 are integrally formed, the number of parts constituting the support assembly can be reduced. Furthermore, by integrally forming the flexible portions 620 and 634, the support 610, and the repetition lever 640, the number of parts constituting the support assembly can be further reduced. As a result, the manufacturing cost can be reduced.

  Further, on the opposite side to the flexible portion 634 with respect to the flexible portion 620, an operation restricting portion 660 for restricting upward rotation of the repetition lever 640 is provided. As a result, it is not necessary to provide a repetition lever button for restricting the rotation of the repetition lever, which is conventionally required, and the repetition lever 640 can be supported by the flexible portion 620. With the structure in which the repetition lever 640 is supported by the flexible portion 620, the number of parts can be reduced compared to the prior art. Further, the extension portion 644 extends from the repetition lever 640 to the support 610 side, and by engaging with the stopper 664 connected to the support 610, a space-saving support assembly can be realized.

  Further, an extending portion 644 extends from the repetition lever 640 to the support 610 side, and is in sliding contact with the guide 666 connected to the support 610. As a result, even if yawing and rolling of the repetition lever 640 are more likely to occur due to the repetition lever 640 being connected to the support 610 via the flexible portion 620, the occurrence of these phenomena is suppressed. can do.

[Sound producing mechanism of keyboard device 1]
The keyboard device 1 is an application example to an electronic piano as described above, and measures the operation of the key 110 by the sensor 510 and outputs a sound according to the measurement result.

  FIG. 10 is a block diagram showing the configuration of the sound generation mechanism of the keyboard device in the first embodiment of the present invention. The sound generation mechanism 50 of the keyboard device 1 includes a sensor 510 (sensors 510-1, 510-2, ... 510-88 corresponding to the key 110 of 88), a signal conversion unit 550, a sound source unit 560, and an output unit 570. . The signal conversion unit 550 acquires the electrical signal output from the sensor 510, and generates and outputs an operation signal corresponding to the operation state of each key 110. In this example, the operation signal is a signal of MIDI format. Therefore, in response to the timing at which the hammer shank 310 collides with the hammer stopper 410 by the key depression operation, the signal conversion unit 550 outputs a note-on. At this time, a key number indicating which one of the 88 keys 110 has been operated and a velocity corresponding to the velocity immediately before the collision are also output in association with the note-on. On the other hand, when the key release operation is performed, in the case of a grand piano, the signal conversion unit 550 outputs the key number and the note-off in association with each other at the timing when the vibration of the string is stopped by the damper. A signal according to another operation such as a pedal may be input to the signal conversion unit 550, and may be reflected in the operation signal. The sound source unit 560 generates a sound signal based on the operation signal output from the signal conversion unit 550. The output unit 570 is a speaker or a terminal that outputs the sound signal generated by the sound source unit 560.

Modified Example 1 of First Embodiment
Next, a modification of the support assembly 60 described in the first embodiment will be described. FIG. 11 is a top view showing the configuration of a support assembly according to a modification of one embodiment of the present invention. Support assembly 60B shown in FIG. 11 is similar to the top view of support assembly 60 shown in FIG. 5, but in the extension direction of support rail 960, width L5 of flexible portion 634B is greater than width L6 of support 610B. It differs from the support assembly 60 in point. Here, in the support assembly 60B, the width L5 is the same as the width L4 of the frame fixing portion 632B. Although FIG. 11 illustrates a structure in which the width L5 is the same as the width L4, the present invention is not limited to this structure. For example, the width L5 may be larger than the width L6 and less than or equal to the width L4.

  As described above, according to the support assembly 60B according to the first modification of the first embodiment of the present invention, the width L5 of the flexible portion 634B is larger than the width L6 of the support 610B in the extension direction of the support rail 960. , Yawing and rolling of the repetition lever 640B can be suppressed.

Modification 2 of the First Embodiment
FIG. 12 is a top view showing the configuration of a support assembly according to a modification of an embodiment of the present invention. The support assembly 60C shown in FIG. 12 is similar to the top view of the support assembly 60B shown in FIG. 11, but is different from the support assembly 60B in that the flexible portion 634C is provided with a through hole 6348 (opening). It is different.

  Although FIG. 12 illustrates the structure in which the through hole 6348 is provided in the flexible portion 634C, the present invention is not limited to this structure. For example, the flexible portion 634C extending from the support 610C may be branched, and the branched flexible portion 634C may be connected to the frame fixing portion 632C at two points.

  As described above, in the support assembly 60C according to the second modification of the first embodiment of the present invention, in the extension direction of the support rail 960, the flexible portion 634C is wider than the width of the support 610C or the repetition lever 640C. By being connected to the frame fixing portion 632C, yawing and rolling of the repetition lever 640C can be suppressed. Further, by providing the through hole 6348 inside the flexible portion 634C, the magnitude of the elastic force of the flexible portion 634C can be adjusted.

Second Embodiment
The support assembly 20 of the keyboard device 1 in the second embodiment of the present invention can be applied to an example in which an example of the support assembly according to the present invention is applied to an electronic piano as in the keyboard device 1 of the first embodiment. The keyboard device of the second embodiment is the same as that of the first embodiment except that the configuration of the support assembly 20 is different from that of the support assembly 60, and therefore the description thereof is omitted.

[Configuration of support assembly 20]
FIG. 13 is a side view showing the configuration of a support assembly according to an embodiment of the present invention. The support assembly 20 includes a support 210, a repetition lever 240, a jack 250, and a torsion coil spring 280.

  The support 210 includes a support heel 212, a frame fixing portion 232, a flexible portion 234, a spring support portion 218, a stopper 216, and a jack support portion 2105.

  The frame fixing portion 232 fixes the support 210 to the support rail 920. The flexible portion 234 is provided between the support 210 and the frame fixing portion 232, and has flexibility. In addition, the flexible portion 234 is integrally formed with the support 210 and the frame fixing portion 232, and has a thickness smaller than at least the support 210 in the rotational direction of the support assembly 20 or the thickness direction of the flexible portion 234. Although FIG. 12 illustrates the structure in which the support 210, the frame fixing portion 232, and the flexible portion 234 are integrally formed, the present invention is not limited to this structure. For example, the flexible portion 234 may be fixed to the support 210 and / or the frame fixing portion 232 by a fixing tool, an adhesive, or welding. Here, the flexible portion 234 is the center of rotation of the support assembly 20.

  The jack support portion 2105 is provided on the opposite side of the frame fixing portion 232 of the support 210 and protrudes upward from the support 210. The support heel 212 and the spring support 218 are provided between the frame fixing portion 232 and the jack support 2105, the support heel 212 protrudes downward from the support 210, and the spring support 218 protrudes upward from the support 210. The stopper 216 is provided at the end of the support 210 opposite to the frame fixing portion 232, and protrudes toward the player's side. The support heel 212 contacts the capstan screw 120 shown in FIG. 1 at its lower surface. The spring support 218 supports the torsion coil spring 280. The jack support 2105 rotatably supports the jack 250. The stopper 216 restricts the upward rotation of the repetition lever 240 by coming into contact with the extension portion 244 connected to the repetition lever 240 described later.

  The spring contact portion 242 and the extension portion 244 are coupled to the repetition lever 240. The spring contact portion 242 and the extension portion 244 extend from the repetition lever 240 to the support 210 side. The spring contact portion 242 contacts the first arm 2802 of the torsion coil spring 280. The repetition lever 240 and the extending portion 244 include two plate-like members sandwiching from both sides of the jack 250. In this example, the extension portion 244 and the jack 250 are in sliding contact with each other in at least a part of the space sandwiched by the two plate-like members.

  The extension portion 244 includes an inner portion 2441, an outer portion 2442, a coupling portion 2443 and a stopper contact portion 2444. The inner portion 2441 is coupled to the player's back side (flexible portion 220 side) than the jack 2502 in the repetition lever 240. A rib 246 is provided at a portion where the inner portion 2441 and the repetition lever 240 are coupled. The inner part 2441 sandwiches and crosses the jack size 2502 and extends to the player's near side (opposite to the flexible section 220) than the jack size 2502. That is, it can be said that the extension portion 244 intersects the jack 250. A protrusion may be provided on one or both of the inner portion 2441 and the jack 2502 to reduce the contact area between the two. The protrusions may be point-shaped or linear.

  The outer side portion 2442 is coupled to the player's near side (opposite to the flexible portion 220) in the repetition lever 240 than the jack 250 (jack 2502). The inner portion 2441 and the outer portion 2442 are joined at a joint 2443. The joint portion 2443 sandwiches the small jack 2504 from both sides. Here, one or both of the coupling portion 2443 and the small jack 2504 may be provided with a protrusion that reduces the contact area between the two. The protrusions may be point-shaped or linear.

  The stopper contact portion 2444 is coupled to the coupling portion 2443 and contacts the stopper 216 from below the stopper 216. That is, the stopper 216 restricts the rotation range of the repetition lever 240 in the direction (upward) in which the repetition lever 240 and the support 210 expand. In other words, the extension portion 244 is connected to the repetition lever 240 on the jack 250 side from the rotation center of the repetition lever 240, and contacts the stopper 216 from below the stopper 216. That is, the stopper 216 is connected to the support 210 below the rotation center of the jack 250 and functions as an operation restricting portion.

  The jack 250 includes a large jack 2502, a small jack 2504 and a protrusion 256. The jack 250 is rotatably disposed relative to the support 210. Between the large jack 2502 and the small jack 2504, a support connection portion 2505 is formed to be rotatably supported by the jack support portion 2105. The support connection portion 2505 is shaped so as to surround a part of the jack support portion 2105, and regulates the rotation range of the jack 250. Further, the jack 250 can be fitted from above the jack support portion 2105 by the shape of the support connection portion 2505 and the elastic deformation of the material thereof. The protrusion 256 protrudes from the large jack 2502 to the opposite side of the small jack 2504 and rotates with the jack 250. The protrusion 256 comprises a spring contact 2562 on its side. The spring contact portion 2562 contacts the second arm 2804 of the torsion coil spring 280.

  The torsion coil spring 280 has the spring support portion 218 as a fulcrum, the first arm 2802 contacts the spring contact portion 242, and the second arm 2804 contacts the spring contact portion 2562. The first arm 2802 functions as an elastic body for applying rotational force to the repetition lever 240 via the spring contact portion 242 so as to move the player side of the repetition lever 240 upward (in the direction away from the support 210). The second arm 2804 functions as an elastic body for applying a turning force to the jack 250 via the spring contact portion 2562 so that the protrusion 256 moves downward (in a direction approaching the support 210).

  In the support assembly 20, when the key 110 is pressed from the rest position to the end position, the joint 2443 and the small jack 2504 both contact the regulating button 360, and the repetition lever 240 and the jack 250 rotate. This operation implements a double escapement mechanism.

  As described above, according to the support assembly 20 according to the second embodiment of the present invention, the number of parts constituting the support assembly can be reduced while securing the operation of the support assembly equivalent to the conventional one. Therefore, since double escapement is realized in a configuration easier than a support assembly used for a general grand piano, it is possible to reduce the manufacturing cost while suppressing the influence on touch feeling.

<Modification example>
In the first and second embodiments described above, the stopper is provided on the front side of the player rather than the jack size, but the jack size and the flexible portion serving as the rotation center of the repetition lever are illustrated. A stopper may be provided between them.

  Although the first embodiment and the second embodiment described above illustrate the configuration in which the stopper is provided separately from the support, the stopper may not be provided separately from the support. An extension connected from the repetition lever to the support may extend to the lower side of the support, and a portion of the support may function as a stopper.

  In the embodiment described above, the repetition lever is coupled to the support via the flexible portion. On the other hand, the extension can also be coupled to the repetition lever of the support assembly used in the conventional grand piano. Then, the extension portion can be brought into contact from below the stopper with respect to a member (stopper) coupled to the support or the jack.

  In the first and second embodiments described above, the electronic piano is shown as an example of the keyboard apparatus to which the support assembly is applied. On the other hand, the support assembly of the above embodiment can also be applied to a grand piano (acoustic piano). In addition, when applying the support assembly of this invention to an acoustic piano, a hammer stopper and a sensor can be abbreviate | omitted, and a string and a damper are provided instead of these.

  In addition, this invention is not limited to said embodiment, It is possible to change suitably in the range which does not deviate from the meaning.

1: keyboard device, 20, 60: support assembly, 50: sound generation mechanism, 110: key, 120: capstan screw, 210, 610: support, 212, 612: support heel, 216, 664: stopper, 218: spring support Part, 220, 234, 620, 634: Flexible part, 232, 632: Frame fixing part, 240, 640: Repetition lever, 242: Spring contact part, 244, 644, 662: Extension part, 246: Rib, 250 , 650: Jack, 256: Protrusion, 280: Torsion coil spring, 310: Hammer shank, 315: Hammer roller, 320: Hammer, 330: Hammer shank, 346: Repetition regulating screw, 360: Regulating Button, 390: Shank flange, 410: Hammer stopper, 510: Sensor, 520: Shielding plate, 550: Signal conversion portion, 560: Sound source portion, 570: Output portion, 638: Pedestal, 642, 6442, 6444: Slit, 648 : Support fixed part, 660: Motion control part, 666: Guide, 672: Fixed hole, 674: Fixing member, 680, 682, 684: Coil spring, 900: Bracket, 910: Balance rail, 920, 960: Support rail, 930: Shank rail, 940: Hammer stopper rail, 950: Sensor rail, 2105: Jack support portion, 2441: Inner portion, 2442: Outer portion, 2443: Coupling portion, 2444: Stopper contact portion, 2502, 6502: Jack size, 2504, 504: jack small, 2505: support connection portion, 2562: spring contact portion, 2802: first arm, 2804: second arm, 6105: jack pivot shaft, 6322: concave portion, 6324: convex portion, 6342: first plate Thick part, 6344: Second thick part, 6346: Curved surface, 6348: Through hole, 9602: Convex part

Claims (8)

  1. With support
    A repetition lever rotatably disposed on the support;
    A flexible first flexible portion provided between a fixed portion rotatably fixing the support to the frame and the support;
    An operation restricting portion provided on the opposite side to the first flexible portion with respect to the pivoting center of the repetition lever, and restricting upward pivoting of the repetition lever;
    A support assembly characterized by having:
  2.   The support assembly of claim 1, wherein the first flexible portion is integrally formed with the support.
  3.   The support assembly according to claim 1, wherein a width of the first flexible portion is larger than a width of the support in a direction in which the frame extends.
  4.   The support assembly according to any one of claims 1 to 3, further comprising a second flexible portion provided between the repetition lever and the support and having flexibility.
  5.   5. The support assembly of claim 4, wherein the second flexible portion is integrally formed with the repetition lever.
  6.   The support assembly according to claim 5, wherein the first flexible portion, the second flexible portion, the support and the repetition lever are integrally formed.
  7. The repetition lever has a first extending portion connected to the support side of the repetition lever,
    The support assembly according to claim 1 , wherein the first extension portion contacts the movement restricting portion from below.
  8. A plurality of support assemblies according to any one of claims 1 to 7,
    A key disposed for each of the support assemblies and for pivoting the support;
    A sound generation mechanism that sounds in response to pressing of the key;
    Keyboard device equipped with

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JP6343318B2 (en) * 2016-09-21 2018-06-13 京楽産業.株式会社 Game machine
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JPS492327U (en) * 1972-04-07 1974-01-10
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EP0101710B1 (en) * 1982-02-26 1986-08-27 Prutec Limited Improvements in piano actions
JP2507715Y2 (en) * 1988-08-29 1996-08-21 株式会社河合楽器製作所 Piano mechanism
JP4549090B2 (en) * 2004-03-31 2010-09-22 株式会社河合楽器製作所 Rotating parts of keyboard instruments and key support mechanism
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