WO2017082247A1

WO2017082247A1 - Keyboard device

Info

Publication number: WO2017082247A1
Application number: PCT/JP2016/083101
Authority: WO
Inventors: 成泰谷口; 佐藤　剛
Original assignee: ヤマハ株式会社
Priority date: 2015-11-09
Filing date: 2016-11-08
Publication date: 2017-05-18
Also published as: JPWO2017082247A1; JP6569738B2

Abstract

Provided is a keyboard device comprising: a key which is rotatable through a predetermined stroke; a support assembly which includes a support rail extending in one direction, a support of which one side is rotatably supported on the support rail by means of a support member, and a jack of which one side is rotatably supported on the support, the support assembly being rotated as the key is pressed; a hammer unit of which one side is rotatably supported on a shank rail and which rotates as a result of the action of the jack as the key is pressed; and a hammer shank stopper which regulates rotation of the hammer unit, wherein the support rail supports a plurality of support assemblies arranged in one direction, and the hammer shank stopper is integrally provided with respect to a plurality of hammer units.

Description

Keyboard device

The present invention relates to an action mechanism of a keyboard device.

Conventional acoustic pianos such as grand pianos and upright pianos are composed of many parts. Moreover, since the assembly of these parts is very complicated, it takes a long time to assemble. In particular, the action mechanism provided corresponding to each key requires many parts, and its assembling work is very complicated.

For example, in the action mechanism shown in Japanese Patent Laid-Open No. 2005-292361, a plurality of parts interact with each other, and the key operation by key pressing and key release is transmitted to the hammer. In particular, the support assembly that forms part of the action mechanism operates in combination with various parts. The support assembly has not only a mechanism for realizing hammering by a hammer in response to a key press, but also an escapement mechanism for releasing a force transmitted to the hammer by the operation of the key immediately before the string is hit. This mechanism is an important mechanism for realizing the basic operation of an acoustic piano. In particular, a grand piano generally employs a double escapement mechanism in which a repetition lever and a jack are combined.

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

Because the number of parts that make up the action mechanism is large, the manufacturing period becomes longer and the manufacturing cost increases. Therefore, in order to reduce the manufacturing cost, it is desired to simply reduce the number of parts or simplify the structure. However, even if the number of parts of the action mechanism is reduced, it is required that the touch feeling during key operation does not change greatly. Further, even when the number of parts of the action mechanism is reduced and the structure is simplified, the support assembly is required to stably operate following the key depression.

One of the objects of the present invention is to stabilize the operation even when the structure is simplified as compared with a keyboard device of an acoustic piano, and to suppress a change in touch feeling during key operation.

According to one embodiment of the present invention, a key that can be rotated by a predetermined stroke, a support rail that extends in one direction, and a support that is supported on the support rail so that one side can be rotated by a support member. A support assembly that includes a jack that is rotatably supported by a support on one side, and that rotates by pressing a key; and a jack that is rotatably supported by a shank rail on one side and that is A hammer unit that rotates under the action of the hammer unit, and a hammer shank stopper that restricts the rotation of the hammer unit. The support rail supports a plurality of support assemblies arranged in one direction. A keyboard apparatus provided integrally with the hammer unit is provided.

It is a side view which shows the structure of the keyboard apparatus 1 which concerns on one Embodiment of this invention. It is a side view which shows the structure of the support assembly in the keyboard apparatus 1 which concerns on one Embodiment of this invention, and a support rail. It is a perspective view which shows the structure of the attachment part of the support and support rail in the keyboard apparatus 1 which concerns on one Embodiment of this invention. It is a top view which shows the structure of the attaching part of the support and support rail in the keyboard apparatus 1 which concerns on one Embodiment of this invention. It is a top view which shows the structure of the attaching part of the support and support rail in the keyboard apparatus 1 which concerns on one Embodiment of this invention. It is a perspective view which shows the aspect by which the several support assembly is supported by the support rail in the keyboard apparatus 1 which concerns on one Embodiment of this invention. It is a side view for demonstrating operation | movement of the support assembly and hammer assembly of the keyboard apparatus 1 which concern on one Embodiment of this invention. It is a side view for demonstrating operation | movement of the support assembly and hammer assembly of the keyboard apparatus 1 which concern on one Embodiment of this invention. It is a block diagram which shows the structure of the sound generation mechanism of the keyboard apparatus 1 in one Embodiment of this invention. It is a side view which shows the structure of the keyboard apparatus 2 which concerns on one Embodiment of this invention. It is a side view which shows the structure of the support assembly in the keyboard apparatus 2 which concerns on one Embodiment of this invention, a support rail, and a hammer shank stopper. It is a perspective view which shows the structure of the attachment part of a support and a support rail in the keyboard apparatus 2 which concerns on one Embodiment of this invention. It is an assembly drawing which shows the structure of the attachment part of a support and a support rail in the keyboard apparatus 2 which concerns on one Embodiment of this invention.

Hereinafter, a keyboard device including a support assembly according to an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are examples of embodiments of the present invention, and the present invention should not be construed as being limited to these embodiments. Note that in the drawings referred to in the present embodiment, the same portion or a portion having a similar function is denoted by the same reference symbol or a similar reference symbol (a reference symbol simply including A, B, etc. after a number) and repeated. The description of may be omitted. In addition, the dimensional ratios of the drawings (the ratios between the components, the ratios in the vertical and horizontal height directions, etc.) may be different from the actual ratios for convenience of explanation, or some of the configurations may be omitted from the drawings.

[First Embodiment]
<Configuration of keyboard device 1>
With reference to FIG. 1, the outline | summary of the keyboard apparatus based on 1st Embodiment of this invention is demonstrated. FIG. 1 shows a configuration of a key, a support assembly, and a hammer assembly in the keyboard device 1. The keyboard device 1 according to the present embodiment can be applied as an action mechanism of an electronic piano, for example. This electronic piano has a structure close to a support assembly included in the grand piano in order to obtain a touch feeling close to that of the grand piano when operating keys.

FIG. 1 is a side view showing a mechanical configuration of a keyboard apparatus 1 according to an embodiment of the present invention. The keyboard device 1 according to an embodiment of the present invention includes a plurality of keys 110 (for example, 88 keys) and an action mechanism corresponding to each of the keys 110. The action mechanism includes a support assembly 20 and a hammer assembly 30. 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 directions such as the player's front side, the player's back side, the upper side, the lower side, and the side are defined as directions when the keyboard device is viewed from the player side. For example, in the example of FIG. 1, the support assembly 20 is disposed on the player's back side when viewed from the key 110 and is disposed on the upper side. 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 rotates with a predetermined stroke in the range from the rest position to the end position shown in FIG. Here, the “rest position” is a key position in a state where the key is not pressed, and the “end position” is a key position where the key is fully pressed. The key 110 includes a capstan screw 120. The support assembly 20 is rotatably supported by a support member 290 provided on the support rail 920 and is placed on the capstan screw 120. The rotation of the support assembly 20 is regulated by the regulating unit 360. The support assembly 20 is provided with a jack 250 so as to be rotatable.

The support rail 920 is a longitudinal member that extends along the side where the keys 110 are arranged. The support rail 920 is provided with a support member 290 that supports the support 210. The support member 290 may be attached to the support rail 920 as an individual part, or may be integrally formed with the support rail 920. The support rail 920 is an example of a frame that serves as a reference for the rotation of the support assembly 20, as long as the support can be rotatably supported, and the form is not limited to the structure of the present embodiment.

The hammer assembly 30 includes a shank rail 930 and a shank flange 390, and a hammer 320, a hammer shank 310, and a hammer roller 315 provided so as to be rotatable with respect to them. The shank flange 390 is fixed to the shank rail 930. The hammer shank 310 is rotatably connected to the shank flange 390. The hammer shank 310 may be provided with a hammer roller 315, and is placed on the support assembly 20 through the hammer roller 315. The hammer 320 is fixed to the end of the hammer shank 310. The hammer stopper 410 is fixed to the hammer stopper rail 940, and is disposed on the rotation track when the hammer shank 310 is rotated by the key depression.

1 illustrates a hammer 320, a hammer shank 310, and a hammer roller 315 as constituent members of the hammer assembly 30, but the present invention is not limited to this and can take various forms. That is, any hammer unit that can rotate with respect to a member corresponding to the shank rail may be used, and the hammer assembly 30 is not limited to such a mode. For example, the hammer shank 310 and the hammer roller 315 may be integrally formed as a member as a hammer unit. That is, a member corresponding to the hammer roller 315 may be included in the structure of the hammer shank 310. Alternatively, a member corresponding to the hammer roller 315 may be provided on the jack 250 side. Further, the shank rail 930 is not limited to the above-described mode, and it is sufficient that the hammer assembly 30 can be rotatably supported. For example, it may not be in the form of a rail. In any case, the hammer assembly 30 includes a fixed portion and a rotating portion that rotates under the action of the jack 250 as will be described later.

The hammer assembly 30 rotates around the end where the hammer 320 and the hammer shank 310 are supported by the shank flange 390. In the keyboard device 1 according to the present embodiment, a hammer shank stopper 325 is provided on the rotation trajectory of the hammer shank 310. The hammer shank stopper 325 restricts the rotation range of the hammer shank 310 by being provided on the rotation track of the hammer shank 310. In the present embodiment, the hammer shank stopper 325 is supported by the support rail 920. Since the support rail 920 is a fixed portion, the position of the hammer shank stopper 325 is defined by this, and even if the key 110 is operated to operate the support assembly 20 and the hammer assembly 30, the support rail 920 is not affected. It arrange | positions in the position which contact | abuts reliably.

Sensor 510 detects the operation of the hammer assembly 30. A sensor 510 illustrated in FIG. 1 is a sensor for measuring the position and moving speed of the hammer shank 310 (particularly, 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, the sensor 510 is a photo interrupter. The output value from the sensor 510 changes according to 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. Instead of the sensor 510 or together with the sensor 510, a sensor for measuring the operation state of the key 110 may be provided.

The above-described support rail 920, shank rail 930, hammer stopper rail 940, and sensor rail 950 are supported by the bracket 900. That is, in the keyboard apparatus 1 shown in FIG. 1, the shank flange 390 and the shank rail 930 and the support rail 920 that fix the shank flange 390 are fixed by the bracket 900, and these members are fixing portions, whereas the hammer assembly 30 and The support assembly 20 is a movable part that rotates when the key 110 is pressed. In addition, this structure is one form for implementing this invention, and is not limited to these structures.

<Configuration of support rail and support assembly>
FIG. 2 is a side view showing a configuration of a support rail and a support assembly according to an embodiment of the present invention. The support assembly 20 is supported by the support rail 920 via the support member 290. The support assembly 20 includes a support 210, a repetition lever 240, a jack 250, and a torsion coil spring 280.

The support 210 and the repetition lever 240 are coupled via the flexible portion 220. The repetition lever 240 is rotatably supported by the support 210 by the flexible portion 220. The support assembly 20 is a resin-made structure manufactured by injection molding or the like except for a cushioning material (nonwoven fabric, elastic body, etc.) provided at a portion that collides with the torsion coil spring 280 and other members. Also good. In this example, the support 210 and the repetition lever 240 are integrally formed. Note that the support 210 and the repetition lever 240 may be formed as separate parts and bonded or joined together.

The support 210 has a through hole 2109 at one end and a jack support 2105 at the other end. The support 210 includes a support heel 212 protruding downward and a spring support 218 protruding upward between the through hole 2109 and the jack support 2105.

The support heel 212 is in contact with the capstan screw 120 described above on the lower surface thereof. The spring support 218 supports the torsion coil spring 280. The jack support part 2105 supports the jack 250 so that rotation is possible. For this reason, the jack support 2105 is the center of rotation of the jack 250.

The support 210 is coupled to a support member 290 provided on the support rail 920 through a through hole 2109 provided on one end side. FIG. 3 is a perspective view of a connecting portion between the support 210 and the support member 290. The support member 290 is provided on the support rail 920. One end of the support 210 is bifurcated, and the bifurcated portion 211 is provided so as to sandwich the support member 290. The support 210 and the support member 290 are connected by a shaft 2902. FIG. 4A shows a plan view of a connecting portion between the support 210 and the support member 290. The support member 290 is provided with a through hole 2901. The through hole 2901 of the support member 290 is provided at a position aligned with the through hole 2109 of the support 210. By inserting the shaft 2902 into the through hole 2901 and the through hole 2109, the support 210 is rotatably connected to the support rail 920. When the support rail 920 extends laterally along the arrangement of the keys 110, the support 210 corresponding to each key 110 and the shaft 2902 that communicates the through hole 2109 and the through hole 2901 in the support member 290 are used. A plurality of supports can be supported by a single shaft.

The support member 290 has a plate shape that protrudes from one surface of the support rail 920 and is sandwiched between the bifurcated portions 211 of the support 210. FIG. 4A shows a mode in which the support member 290 is formed of a two-piece structure corresponding to the bifurcated portion 211 of the support 210, but the present invention is not limited to this, and is sandwiched between the bifurcated portions 211. It may be a piece structure. Further, as shown in FIG. 4B, a through hole 2109 may be provided in one of the bifurcated portions 211 of the support 210, and the support member may be connected by a through hole 2901 and a pin 2903. In any case, one end of the support 210 is disposed so as to be rotatable with respect to the support rail 920 via the support member 290. As a result, the through hole 2109 becomes the center of rotation of the support 210.

The shape of the support rail 920 is arbitrary, but preferably has a U-shaped or L-shaped cross-sectional shape. Further, the support rail 920 may be made of metal or resin. If the support rail 920 is made of resin, the weight can be reduced. FIG. 4A illustrates an L-shaped cross-sectional shape. When the support rail 920 has a U-shaped or L-shaped cross-sectional shape, rigidity against a bending moment acting in the longitudinal direction can be improved. Further, the support member 290 may be integrally formed with the support rail 920 in addition to a mode in which the support member 290 is mounted as a separate component. When connecting the plurality of supports 210 of the support rail 920, the support member 290 is formed integrally with the support rail 920, so that the number of parts for configuring the keyboard device 1 can be reduced.

Referring to FIG. 2 again, a space is formed between the through hole 2109 (the rotation center of the support 210) and the jack support portion 2105 (the rotation center of the jack 250) on the jack support portion 2105 side from the support heel 212. Is done. A jack support 2105 projects upward from the support 210. A stopper 216 is coupled to the end of the support 210. The support heel 212 is disposed below the support 210.

A spring contact portion 242 and an extending portion 244 are coupled to the repetition lever 240. The spring contact portion 242 and the extending 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 that are sandwiched from both sides of the jack 250. In this example, the extending portion 244 and the jack 250 are in sliding contact with each other in at least a part of the space sandwiched between the two plate-like members.

The extended 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 back side (flexible portion 220 side) with respect to the large jack 2502 in the repetition lever 240. The inside portion 2441 intersects with the jack large 2502 interposed therebetween, and extends to the player's front side (the side opposite to the flexible portion 220) from the jack large 2502. The inner portion 2441 may include a linear convex portion that protrudes toward the jack large 2502 at a portion sandwiching the jack large 2502.

The outer portion 2442 is coupled to the player's front side (opposite to the flexible portion 220) with respect to the jack 250 (jack size 2502) in the repetition lever 240. The inner portion 2441 and the outer portion 2442 are coupled at a coupling portion 2443. The coupling portion 2443 sandwiches the small jack 2504. The stopper contact portion 2444 is coupled to the coupling portion 2443 and contacts the stopper 216 from below the stopper 216. According to this, 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. The guide part 215 includes a pair of members protruding upward so as to sandwich a part of the jack 250 from the support 210.

The jack 250 includes a large jack 2502, a small jack 2504, and a protrusion 2508. The jack 250 is disposed so as to be rotatable with respect to the support 210. Between the large jack 2502 and the small jack 2504, a support connecting portion 2505 is formed to be rotatably supported by the jack support portion 2105. The support connection portion 2505 has a shape surrounding a part of the jack support portion 2105 and restricts 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. The protruding portion 2508 protrudes from the large jack 2502 to the opposite side of the small jack 2504 and rotates together with the jack 250. The protruding portion 2508 includes a spring contact portion 2562 on the side surface. The spring contact portion 2562 contacts the second arm 2804 of the torsion coil spring 280.

2, the torsion coil spring 280 has the spring support portion 218 as a fulcrum, the first arm 2802 is in contact with the spring contact portion 242, and the second arm 2804 is in contact with the spring contact portion 2562. The first arm 2802 functions as an elastic body that applies rotational force to the repetition lever 240 via the spring contact portion 242 so that the player side of the repetition lever 240 moves upward (in a direction away from the support 210). The second arm 2804 functions as an elastic body that applies rotational force to the jack 250 via the spring contact portion 2562 so that the protruding portion 2508 moves downward (on the support 210 side).

The support assembly 20 having such a configuration is supported by the support rail 920. The support rail 920 can support the plurality of support assemblies 20 by extending in a direction in which the keys 110 are arranged. FIG. 5 shows an aspect in which a plurality of support assemblies 20 are supported by the support rail 920. Each of the plurality of support assemblies 20 is supported by a support member 290 configured as shown in FIG. 4A or 4B. For example, as shown in FIG. 4A, a plurality of support assemblies 20 can be supported by a single shaft 2902 by using a shaft 2902 that communicates with the through hole 2109 of the support 210 and the through hole 2901 of the support member 290. It becomes possible.

In FIG. 5, a hammer shank stopper 325 is provided along the direction in which the support rail 920 extends. For example, when the support rail 920 has an L-shaped cross-sectional shape, the hammer shank stopper 325 is provided on the upper portion of the L shape so as to be disposed on the turning radius of the hammer shank 310. Although not shown in FIG. 5, the hammer assembly 30 is provided corresponding to the support assembly 20. That is, in FIG. 5, the hammer shank stopper 325 is integrally provided for the plurality of hammer assemblies 30. For example, the hammer shank stopper 325 can be provided so as to be shared by a plurality of hammer assemblies constituting one octave. As described above, by integrating the hammer shank stopper 325 with respect to the plurality of hammer assemblies 30, the number of parts can be reduced. Further, since the positional relationship between the hammer shank 310 and the hammer shank stopper 325 is defined by the shape of the support rail 920, mutual positional adjustment is simplified.

<Operation of keyboard device>
The operation of the keyboard apparatus 1 when the key 110 is pressed from the rest position to the end position will be described with a focus on the hammer assembly 30.

6A and 6B are side views for explaining the movement of the support assembly 20 according to an embodiment of the present invention. FIG. 6A shows a state where the key 110 is pressed. When the key 110 is pushed down to the end position, the capstan screw 120 pushes up the support heel 212 to rotate the support 210 upward about the axis of the through hole 2109. By this operation, the jack 250 acts on the hammer assembly 30 to rotate the hammer assembly 30. That is, the hammer assembly 30 is operated by pressing the hammer shank 310 from the jack 250 directly or via another member by pressing the key. The hammer shank 310 affected by the jack 250 collides with the hammer stopper 410. In the case of a general grand piano, this collision corresponds to a stringing operation by a hammer.

Just before the hammer shank 310 collides with the hammer stopper 410, the small jack 2504 comes into contact with the regulating portion 360, and the support 210 is further raised while the upward rotation is restricted. Due to the restriction of the upward rotation by the regulating portion 360 and the rise of the support 210, the large jack 2502 rotates so as to be detached from the hammer roller 315. The repetition lever 240 is displaced so as to approach the support 210 while the upward rotation is restricted by the regulating portion 360. Thereafter, when the key 110 is returned to the rest position, the hammer roller 315 is supported by the repetition lever 240, and the large jack 2502 is returned below the hammer roller 315. The hammer shank 310 that has collided with the hammer stopper 410 is rotated downward while the large jack 2502 is removed. Since the hammer shank stopper 325 is provided on the turning radius, the turning is restricted and the turning beyond the rest position can be prevented. At this time, the hammer shank stopper 325 absorbs the impact caused by the collision of the hammer shank 310 and prevents the generation of noise. For this reason, the hammer shank stopper 325 is preferably a soft material, and for example, a felt material is used.

The hammer shank stopper 325 is stably supported in the action mechanism including a plurality of movable parts by being provided on the support rail 920. Therefore, even if the key 110 is repeatedly hit and the hammer assembly 30 is rotated in conjunction with this, the impact caused by the hammer shank 310 can be effectively absorbed.

<Sounding mechanism of keyboard device>
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 corresponding to the measurement result.

FIG. 7 is a block diagram showing the configuration of the sound generation mechanism of the keyboard device according to the 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 88 keys 110), 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, generates an operation signal corresponding to the operation state of each key 110, and outputs the operation signal. In this example, the operation signal is a MIDI signal. Therefore, the signal conversion unit 550 outputs note-on corresponding to the timing when the hammer shank 310 collides with the hammer stopper 410 by the key pressing operation. At this time, the key number indicating which of the 88 keys 110 has been operated and the 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 corresponding to another operation such as a pedal may be input to the signal conversion unit 550 and 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.

[Second Embodiment]
<Configuration of keyboard device>
With reference to FIG. 8, the outline | summary of the keyboard apparatus 2 which concerns on 2nd Embodiment of this invention is demonstrated. FIG. 8 shows the configuration of the key, the support assembly 60 and the hammer assembly 30 in the keyboard device 2. The keyboard device 2 according to the present embodiment can be applied as an action mechanism of an electronic piano, as in the first embodiment. The keyboard device 2 is similar to the keyboard device 1, but the structure of the support assembly is different. Therefore, there is a part in which the configuration of the support rail 960 is also different. In the present embodiment, the description will focus on the parts that are different from the first embodiment, and the description of the common parts will be omitted.

FIG. 8 is a side view showing the configuration of the keyboard device 2 according to the second embodiment of the present invention. The support assembly 60 is fixed to the support rail 960. The support rail 960 is supported by the bracket 900. In this embodiment, the support assembly 60 is the same as the support assembly 20 in that the support 610 is rotatably supported by the support rail 960, but the support method is different as described later. The support rail 960 is an example of a frame that serves as a reference for rotation of the support assembly 60. The support rail 960 may be formed of one member or may be formed of a plurality of members. The support rail 960 may be made of metal or resin. Weight reduction can be achieved by making the support rail 960 resin. The support rail 960 may have a rail-like shape having a length in the arrangement direction of the keys 110, or may be an independent member for each key 110. In this embodiment as well, a hammer shank stopper 325 is provided on the rotation path of the hammer shank 310. For example, the hammer shank stopper 325 is provided on the support rail 960.

<Configuration of Support Assembly 60>
FIG. 9 is a side view showing the configuration of the support assembly 60 according to the second embodiment of the present invention. The support assembly 60 includes a support 610, a repetition lever 640, a jack 650, an operation restricting portion 660, and

coil springs

682 and 684. The repetition lever 640 is rotatably connected to the support 610 via a repetition lever hinge 620. In this example, the support 610 and the repetition lever hinge 620 are fixed by a fixture 674 via a fixing portion 648 coupled to the repetition lever hinge 620. Of the support assembly 60, except for the coil springs 682 and 684, the cushioning material provided in the portion that collides with other members (nonwoven fabric, elastic body, etc.), and the fixing tool, the resin assembly manufactured by injection molding or the like is used. It is a structure.

The support 610 includes a support heel 612, a frame fixing portion 632, a flexible portion 634, and a base 638. The support 610 is supported by the frame fixing portion 632 sandwiched between the support rail 960 and the support member 635. The support rail 960 is provided with a hammer shank stopper 325. In FIG. 9, the hammer shank stopper 325 is provided on the upper portion of the support member 635. Since the support member 635 is fixed to the support rail 960 with a fastener, it can be considered that the hammer shank stopper 325 is substantially supported by the support rail 960. The shape of the support rail 960 is arbitrary, but preferably has a U-shaped or L-shaped cross-sectional shape. When the support rail 960 has a U-shaped or L-shaped cross-sectional shape, it is possible to improve rigidity with respect to a bending moment acting in the longitudinal direction.

The flexible part 634 provided between the support 610 and the frame fixing part 632 has flexibility (elasticity). The flexible portion 634 is integrally formed with the support 610 and the frame fixing portion 632, and has a thickness that is at least thinner than the support 610 in the rotation direction of the support assembly 60 or the thickness direction of the flexible portion 634. 9 illustrates a 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 both or one of the support 610 and the frame fixing portion 632 by a fixture, an adhesive, welding, or the like. Here, the flexible portion 634 serves as a rotation center of the support assembly 60.

The pedestal 638 is connected to the support lever 640 on the side of the repetition lever 640, and on the upper surface of the pedestal 638 (on the side of the repetition lever 640), a coil spring 682 acting on the pedestal 638 and the repetition lever 640 and a large jack 6502 approach the pedestal 638. And a jack large stopper 6382 for restricting the rotation of the jack 650 in the direction. 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 are separated from each other and functions as an elastic body that imparts rotational force to the repetition lever 640. Between the large jack stopper 6382 and the large jack 6502 is provided a cushioning material (nonwoven fabric, elastic body, etc.) for reducing noise generated by the large jack stopper 6382 and the large jack 6502 coming into contact with each other. May be.

The repetition lever 640 is rotatably supported with respect to the support 610 by a repetition lever hinge 620. The support 610 is provided with a jack support portion 6105 that supports the jack 650 in a region opposite to the frame fixing portion 632. The pedestal 638 is connected to the repetition lever 640 side of the support 610. A coil spring 682 is disposed between the pedestal 638 and the repetition lever 640. The coil spring 682 is a compression spring that applies rotational force to the repetition lever 640 in a direction in which the pedestal 638 and the repetition lever 640 are separated from each other.

In the repetition lever 640, the extending portion 644 is coupled to the large jack 6502 on the side opposite to the repetition lever hinge 620. The extending portion 644 has slits 6442 and 6444.

Jack 650 includes a large jack 6502 and a small jack 6504. The jack 650 is rotatably connected to the support 610 at the jack support portion 6105. A coil spring 684 is disposed between the jack jack 6502 and the support 610. The coil spring 684 is a tension spring that provides rotational force to the jack 650 so that the jack large 6502 approaches the pedestal 638. When the large jack 6502 contacts the pedestal 638, the rotation range of the jack 650 by the coil spring 680 is restricted.

The operation restricting portion 660 is coupled upward (on the repetition lever 640 side) from the jack support portion 6105 side of the support 610. The operation restricting portion 660 includes a support portion 662 that protrudes upward from the support 610, a stopper 664, and a guide 666. The stopper 664 and the guide 666 protrude from the support portion 662 toward the player. The stopper 664 passes through the slit 6442 provided in the extending portion 644. The guide 666 passes through a slit 6444 provided in the extending portion 644.

FIG. 10 is a perspective view showing details of a mounting portion between the support 610 and the support rail 960. FIG. 11 is an assembly view of the support 610, the support rail 960, the support member 635, and the hammer shank stopper 325. FIGS. 10 and 11 show a state in which a plurality of supports (support 610 a and support 610 b) are attached to the support rail 960. The support 610a and the support 610b are fixed to the support rail 960 by overlapping the frame fixing part 632a and the frame fixing part 632b. The support member 635 is attached to the support rail 960 with a fastener. The support 610a and the support 610b are fixed by placing a support member 635 on top of the frame fixing part 632a and the frame fixing part 632b and being sandwiched between support rails 960. The support 610a and the support 610b may be fixed to the support rail 960 with fasteners after the frame fixing portion 632a and the frame fixing portion 632b are overlapped.

The support rail 960 extends in the direction in which the keys are arranged, and supports a plurality of support assemblies 60. The support member 635 has a rectangular shape corresponding to the support rail 960, thereby sandwiching the plurality of support assemblies 60. As described above, the plurality of support assemblies 60 are inserted into the support rails 960 using the support members 635. The support member 635 can hold the plurality of support assemblies 60 stably by attaching both ends of the support member 635 to the support rail 960 with fasteners.

FIG. 10 shows a mode in which the hammer shank stopper 325 is provided along the support rail 960. The hammer shank stopper 325 is attached to the support member 635, but since the support member 635 is fixed to the support rail 960, it can be considered that it is substantially supported by the support rail 960. Note that the present embodiment is not limited to such a configuration, and a part of the support rail 960 is extended above the support member 635, and a hammer shank stopper 325 is provided at one end of the support rail 960 as shown in FIG. May be provided. Although not shown in FIG. 10, the hammer assembly 30 is provided corresponding to the support assembly 60, so that the hammer shank stopper 325 is provided integrally with the plurality of hammer assemblies 30. For example, the hammer shank stopper 325 can be provided so as to be shared by a plurality of hammer assemblies constituting one octave. By integrating the hammer shank stopper 325 with respect to the plurality of hammer assemblies 30, the number of parts can be reduced. Moreover, since the positional relationship between the hammer shank 310 and the hammer shank stopper 325 is defined by the support rail 920, mutual positional adjustment is simplified.

Note that the mechanism in which the hammer shank 310 or the hammer 320 operates by the support assembly 60 acting on the hammer assembly 30 by pressing the key is the same as that in the first embodiment. Since the hammer shank stopper 325 is on the rotation trajectory of the hammer shank 310, the rotation of the hammer shank 310 can be restricted and the operation of the hammer assembly 30 can be stabilized.

In the above-described embodiment, an electronic piano is shown as an example of a keyboard device. However, the present invention is not limited to this, and the support assembly disclosed in the above embodiment can also be applied to a keyboard device similar in grand piano (acoustic piano) and action mechanism.

DESCRIPTION OF SYMBOLS 1,2 ... Keyboard device, 20, 60 ... Support assembly, 30 ... Hammer assembly, 50 ... Sound generation mechanism, 110 ... Key, 120 ... Capstan screw, 210 ... Support, 2105 ... Jack support part, 2109 ... Through hole, 211 ... Fork part 212 ... Support heel, 215 ... Guide part, 216 ... Stopper, 218 ... Spring support part , 220 ... flexible part, 240 ... repetition lever, 242 ... spring contact part, 244 ... extension part, 2441 ... inner part, 2442 ... outer part, 2443 ... Coupling portion, 2444 ... stopper contact portion, 2445 ... first contact portion, 2446 ... second contact portion, 250 ... jack, 2502 ... jack size, 2504 ... Small support, 2505 ... support connection, 2506 ... rib, 2508 ... projection, 2562 ... spring contact, 280 ... torsion coil spring, 2802 ... first arm, 2804 ..Second arm, 290 ... support member, 2901 ... through hole, 2902 ... shaft, 2903 ... pin, 310 ... hammer shank, 315 ... hammer roller, 320 ... hammer 325 ... hammer shank stopper, 360 ... regulating part, 390 ... shank flange, 410 ... hammer stopper, 510 ... sensor, 520 ... shielding plate, 550 ... signal conversion 560 ... sound source 570 ... output unit 610 ... support 612 ... support heel 640 ... repete Lever, 644 ... extension part, 650 ... jack, 6502 ... large jack, 6504 ... small jack, 6505 ... support connection part, 6442, 6444 ... slit, 660 ...・ Operation restriction part, 680... Coil spring, 632 .. frame fixing part, 634... Flexible part, 635 .. support member, 638 .. pedestal, 6382. ... support fixing part, 664 ... stopper, 666 ... guide, 662 ... extension part, 900 ... bracket, 910 ... balance rail, 920, 960 ... support rail, 930 ... Shank rail, 940 ... Hammer stopper rail, 950 ... Sensor rail

Claims

A key that can be rotated by a predetermined stroke;
A support rail extending in one direction;
A support assembly having one side rotatably supported by the support rail, and a jack having one side rotatably supported by the support, and rotating by pressing the key;
A hammer unit that is rotatably supported by the shank rail on one side and is rotated by receiving the action of the jack by pressing the key;
A hammer shank stopper for restricting rotation of the hammer unit;
Including
The support rail supports a plurality of the support assemblies arranged in the one direction,
The hammer shank stopper is provided integrally with the plurality of hammer units.
A keyboard device characterized by that.
The keyboard device according to claim 1, wherein the support rail includes a support member that rotatably supports one side of the support.
The keyboard device according to claim 2, wherein the support member is provided integrally with the support rail.
The keyboard device according to claim 3, wherein the support member has a through hole, and the through hole is aligned with a through hole provided on the one side of the support.
The keyboard device according to claim 4, wherein the support has a bifurcated portion sandwiching the support member from both sides on the one side, and a through hole is provided in at least one of the bifurcated portion.
The keyboard device according to claim 1, wherein a plurality of the support assemblies are inserted into the support rail.
The keyboard device according to claim 5, wherein a cross-sectional shape of the support rail is a U-shape.
The keyboard device according to claim 1, wherein the support rail is made of resin.
The keyboard device according to claim 1, wherein the hammer shank stopper is provided on the support rail.
The keyboard device according to claim 9, wherein the hammer shank stopper is provided along a longitudinal direction of the support rail.