WO2017065200A1

WO2017065200A1 - Support assembly

Info

Publication number: WO2017065200A1
Application number: PCT/JP2016/080334
Authority: WO
Inventors: 聡斗大庭; 俊介市来
Original assignee: ヤマハ株式会社
Priority date: 2015-10-14
Filing date: 2016-10-13
Publication date: 2017-04-20
Also published as: JP6707832B2; JP2017076025A

Abstract

The objective of the present invention is to reduce the production cost of a support assembly while suppressing changes in touch sensation during key operation. The support assembly has a support that is rotatably mounted on a frame, a repetition lever support member that is connected to the support, a repetition lever that is provided with a recess and is rotatably attached to the support by positioning the repetition lever support member in the recess, and an operation member that is fixed to the repetition lever and receives an upward action.

Description

Support assembly

The present invention relates to a support assembly used for 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 a large number of parts, so that the assembly work is very complicated.

For example, in the action mechanism shown in Patent Document 1, a plurality of parts interact with each other, and the operation of the key by pressing and releasing the key 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.

JP 2005-292361 A

Since the number of parts constituting the support assembly is large, the manufacturing period is prolonged and the manufacturing cost is increased. 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 when operating the key is greatly changed. Therefore, it is difficult to reduce the manufacturing cost of an acoustic piano.

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

A support assembly according to an embodiment of the present invention includes a support that is rotatably arranged with respect to a frame, a repetition lever support that is connected to the support, a recess, and a repetition lever support that is provided inside the recess. And a repetition lever that is rotatably attached to the support, and an action portion that is fixed to the repetition lever and receives an upward action.

It may further include a repetition lever pressing portion that contacts the action portion from below and presses the repetition lever upward.

The repetition lever pressing part may be an elastic member connected to the support.

The repetition lever includes a protrusion that protrudes from the repetition lever,
The action part may be provided in the protrusion part.

The concave portion may contact the repetition lever support portion from below.

It may further have a restricting means for restricting the upward rotation of the repetition lever.

The width of the opening end of the recess may be larger than the width of the repetition lever support.

A support assembly according to an embodiment of the present invention is provided with a support that is rotatably arranged with respect to a frame, a recess lever support portion that is connected to the support, and is rotatably attached to the support. A repetition lever, a support connecting portion connected to the repetition lever and disposed inside the recess, and an action portion fixed to the repetition lever and receiving an upward action.

The support connection part may contact the concave part from below.

The width of the opening end of the recess may be larger than the width of the support connection.

According to one embodiment of the present invention, it is possible to reduce the manufacturing cost of the support assembly while suppressing a change in touch feeling during key operation, as compared with an acoustic piano keyboard device.

It is a side view which shows the structure of the keyboard apparatus which concerns on one Embodiment of this invention. It is a side view which shows the structure of the support assembly which concerns on one Embodiment of this invention. It is an enlarged side view of the repetition lever support part and support connection part in the support assembly concerning one embodiment of the present invention. It is an exploded view of a repetition lever support part and a support connection part in a support assembly concerning one embodiment of the present invention. It is a side view for demonstrating a motion of the support assembly which concerns on one Embodiment of this 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 an enlarged side view of the repetition lever support part and support connection part in the support assembly concerning one embodiment of the present invention. It is an exploded view of a repetition lever support part and a support connection part in a support assembly concerning one embodiment of the present invention. It is a side view which shows the structure of the keyboard apparatus which concerns on one Embodiment of this invention. It is a side view which shows the structure of the support assembly which concerns on one Embodiment of this invention. It is a side view showing composition of a stopper and a guide of a support assembly of a rest position concerning one embodiment of the present invention. It is a side view showing composition of a stopper and a guide of an end position support assembly concerning one embodiment of the present invention. It is a side view for demonstrating a motion of the support assembly 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]
The keyboard device 1 according to the first embodiment of the present invention is an example in which an example of a support assembly according to the present invention is applied to an electronic piano. 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. The outline of the keyboard apparatus 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 apparatus 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 a plurality of keys 110 (88 keys in this example) and an action mechanism corresponding to each of the keys 110. The action mechanism includes a support assembly 20, a hammer shank 310, a hammer 320 and a hammer stopper 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 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 shown in FIG. 1, the support assembly 20 is disposed on the front side of the performer when viewed from the hammer 320 and is disposed above when viewed from 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 rotates 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 connected to the support flange 290 and is placed on the capstan screw 120. The support flange 290 is fixed to the support rail 920. The detailed configuration of the support assembly 20 will be described later. The support flange 290 and the support rail 920 are examples of a frame that serves as a reference for rotation of the support assembly 20. The frame may be formed of a plurality of members such as the support flange 290 and the support rail 920, or may be formed of one member. The frame may be a rail-like member having a length in the arrangement direction of the keys 110 like the support rail 920, or may be a member independent for each key 110 like the support flange 290.

The hammer shank 310 is rotatably connected to the shank flange 390. The hammer shank 310 includes a hammer roller 315. The hammer shank 310 is placed on the support assembly 20 via a 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 regulating button 360 is fixed to the shank rail 930. The hammer stopper 410 is fixed to the hammer stopper rail 940 and is disposed at a position where the rotation of the hammer shank 310 is restricted.

The sensor 510 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 support rail 920, 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 20]
FIG. 2 is a side view showing the configuration of the support assembly according to the 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 and the repetition lever 240 are attached by the support connection portion 248 connected to the repetition lever 240 being locked to the repetition lever support portion 214 connected to the support 210. The repetition lever 240 is rotatably supported with respect to the support 210 by locking the support connection portion 248 and the repetition lever support portion 214. The details of the configuration in which the repetition lever support portion 214 supports the repetition lever 240 will be described later. The support assembly 20 is a resin 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.

The support 210 has a through hole 2109 formed on one end side and a jack support portion 2105 protruding upward from the support 210 on the other end side. The support 210 includes a support heel 212 protruding downward and a spring support portion 218 protruding upward between the through hole 2109 and the jack support 2105. A shaft supported by the support flange 290 is passed through the through hole 2109. Accordingly, the support 210 is disposed so as to be rotatable with respect to the support flange 290 and the support rail 920. The support heel 212 is in contact with the capstan screw 120 described above on its lower surface. The spring support 218 supports the torsion coil spring 280. The jack support part 2105 supports the jack 250 so that rotation is possible.

Between the through hole 2109 and the jack support 2105, a space SP exists on the jack support 2105 side from the support heel 212. For convenience of explanation, the support 210 divides the first main body portion 2101, the bent portion 2102, and the second main body portion 2103 from the through hole 2109 side. In this case, the second main body 2103 is arranged closer to the key 110 (downward) than the first main body 2101 by the bent portion 2102 that connects the first main body 2101 and the second main body 2103. The jack support 2105 protrudes upward from the second main body 2103. According to this section, the space SP corresponds to a region sandwiched between the bent portion 2102 and the jack support portion 2105 above the second main body portion 2103. A stopper 216 is coupled to the end of the support 210 (the end on the second main body 2103 side).

The support connecting portion 248, the spring contact portion 242, and the extending portion 244 are coupled to the repetition lever 240. The support connecting portion 248, the spring contact portion 242, and the extending portion 244 extend from the repetition lever 240 toward the support 210. Support connection 248 is coupled to one end of repetition lever 240. The support connection portion 248 is provided with a recess 2482 having an open end on the upper side. The repetition lever 240 is disposed on the inside of the recess 2482 so that the repetition lever 240 is rotatably attached to the support 210. Here, the support connecting portion 248 is in contact with the repetition lever support portion 214 from below the repetition lever support portion 214 in the recess 2482.

The spring contact portion 242 protrudes from the repetition lever 240 to the support 210 side. The spring contact part 242 can also be called a protrusion part. The spring contact portion 242 contacts the first arm 2802 of the torsion coil spring 280 and receives an upward action from the first arm 2802. In other words, the first arm 2802 contacts the spring contact portion 242 from below the spring contact portion 242 and presses the repetition lever 240 upward. In other words, the first arm 2802 imparts the rotation action of the repetition lever 240 to the spring contact portion 242. Here, the spring contact part 242 can also be called an action part. The first arm 2802 or the torsion coil spring 280 can also be referred to as a repetition lever pressing portion. Here, the repetition lever pressing portion is not limited to the torsion coil spring 280, and may be an elastic member represented by a compression type coil spring or rubber. Further, the repetition lever pressing portion is not limited to the elastic member, and may be another mechanical structure that presses the repetition lever 240 upward. For example, a gas cylinder (or an air cylinder) in which a gas is sealed may be used as the repetition lever pressing portion. In FIG. 2, the structure in which the spring contact portion 242 has a shape protruding toward the support 210 is illustrated, but the structure is not limited to this structure.

The repetition lever 240 and the extending portion 244 include two plate-like members sandwiched from both side surfaces 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 structure in which the extending portion 244 and the jack 250 are in sliding contact will be described in detail below.

The extending part 244 includes an inner part 2441, an outer part 2442, a coupling part 2443 and a stopper contact part 2444. The inner portion 2441 is coupled to the repetition lever 240 on the player's back side (the repetition lever support portion 214 side) with respect to the large jack 2502. A rib 246 is provided at a portion where the inner portion 2441 and the repetition lever 240 are coupled. The inner portion 2441 intersects with the jack size 2502 interposed therebetween, and extends to the player's front side (opposite to the repetition lever support portion 214) from the jack size 2502. That is, it can be said that the extended portion 244 intersects the jack 250. The inner portion 2441 is provided with a linear protrusion P1 that reduces the contact area between the inner portion 2441 and the large jack 2502. The protrusion P1 may have a point shape.

The outer portion 2442 is coupled to the repetition lever 240 on the front side of the performer (opposite to the repetition lever support portion 214) with respect to the jack 250 (jack size 2502). Inner portion 2441 is coupled to outer portion 2442 at coupling portion 2443. The connecting portion 2443 sandwiches the small jack 2504 from both side surfaces. Here, between the coupling portion 2443 and the small jack 2504, one or both of the coupling portion 2443 and the small jack 2504 is provided with a protruding portion that reduces the contact area between them, such as the above-described protruding portion P1. May be. The protrusion 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 is a restricting means that 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 extended 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. Here, the stopper 216 is connected to the support 210 below the rotation center of the jack 250.

The jack 250 includes a large jack 2502, a small jack 2504, and a protruding portion 256. The jack 250 is disposed so as to be rotatable with respect to the support 210. The jack 250 is formed with a support connection portion 2505 that is rotatably supported by the jack support portion 2105 between the large jack 2502 and the small jack 2504. The support connection portion 2505 is provided with a recess 2506 on the lower side (support 210) side of the jack 250. The jack support 2105 is disposed inside the recess 2506.

As described above, the jack 250 rotates around the jack support portion 2105 by disposing the jack support portion 2105 inside the recess 2506. Further, the jack 250 can be fitted from above the jack support portion 2105 due to the shape of the support connection portion 2505. The protruding portion 256 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 256 includes a spring contact portion 2562 on a side surface thereof, and includes a jack rotation stopper 2564 on an end portion opposite to the jack small portion 2504. The spring contact portion 2562 contacts the second arm 2804 of the torsion coil spring 280 and receives a downward action from the second arm 2804. Here, when the rotation restricting means for restricting the downward rotation of the protruding portion 256 is provided separately from the rotation stopper 2564, the rotation stopper 2564 may not be provided.

In other words, the second arm 2804 contacts the spring contact portion 2562 from above the spring contact portion 2562, and presses the protruding portion 256 downward. In other words, the second arm 2804 imparts the rotating action of the jack 250 to the spring contact portion 2562. Here, the spring contact portion 2562 can also be referred to as an action portion. Further, the second arm 2804 or the torsion coil spring 280 can also be referred to as a protruding portion pressing portion or a jack pressing portion. Here, the protruding portion pressing portion or the jack pressing portion is not limited to the torsion coil spring 280, and may be an elastic member typified by a compression type coil spring or rubber.

The large jack 2502 includes linear protrusions P2 that protrude from both side surfaces of the large jack 2502 and reduce the contact area between the large jack 2502 and the inner portion 2441. The protrusion P2 is in sliding contact with the protrusion P1 of the inner portion 2441 described above. As described above, the jack 250 and the extending portion 244 are in sliding contact with each other via the protrusions P1 and P2, so that the contact area is reduced. In addition, the grease pool may be formed by providing a plurality of protrusions P2 and forming a groove between the plurality of protrusions P2.

The torsion coil spring 280 has a rod-shaped first arm 2802, a second arm 2804, and a coil 2806. The coil 2806 has an annular shape, is supported by a spring support portion 218, and is in contact with the spring support portion 218 at a fulcrum inside the coil 2806. The first arm 2802 functions as an elastic body that contacts the spring contact portion 242 and applies rotational force to the repetition lever 240 so as to move the player side of the repetition lever 240 upward (in a direction away from the support 210). To do. The second arm 2804 functions as an elastic body that imparts rotational force to the jack 250 so that the projecting portion 256 moves downward (in a direction approaching the support 210) in contact with the spring contact portion 2562. The above is the description of the configuration of the support assembly 20.

[Configuration of the repetition lever support 214 and the support connection 248]
The structure of the repetition lever support part 214 and the support connection part 248 is demonstrated in detail using FIG. 3A and 3B. FIG. 3A is an enlarged side view of a repetition lever support portion and a support connection portion in a support assembly according to an embodiment of the present invention. FIG. 3B is an exploded view of a repetition lever support part and a support connection part in the support assembly according to the embodiment of the present invention. Here, FIG. 3A is a side view in a state in which the support connection portion 248 is locked to the repetition lever support portion 214. FIG. 3B is a side view of the support connection portion 248 in a state where the support connection portion 248 is removed from the repetition lever support portion 214.

3B, the repetition lever support portion 214 includes a repetition lever rotating shaft 2142 and a connecting portion 2144. The connecting portion 2144 connects the repetition lever rotating shaft 2142 and the support 210. The lower end of the repetition lever rotating shaft 2142 has an arc shape. The recess 2482 provided in the support connection portion 248 has an arc shape corresponding to the arc shape of the lower end of the repetition lever rotating shaft 2142 on the lower surface portion of the recess 2482. The radius of curvature of the arc of the recess 2482 is larger than the radius of curvature of the arc of the rotation lever rotating shaft 2142. Here, when the lower end portion of the repetition lever rotation shaft 2142 and the lower surface portion of the concave portion 2482 are not in an arc shape but an elliptical shape or a curved shape, both of them at the contact point between the repetition lever rotation shaft 2142 and the lower surface portion of the concave portion 2482 The radius of curvature may be designed to satisfy the above conditions. As shown in FIG. 3A, the recess 2482 engages with the repetition lever rotation shaft 2142, so that the repetition lever 240 rotates about the repetition lever rotation shaft 2142.

Here, the width L1 in the vicinity of the opening end of the recess 2482 is larger than the width L2 of the repetition lever rotating shaft 2142. That is, when removing the repetition lever 240 from the support 210, the recess 2482 is not caught by the repetition lever rotating shaft 2142, so that the support connection portion 248 can be smoothly removed from the repetition lever support portion 214. Although FIG. 3 illustrates a configuration in which the width L1 is larger than the width L2, the configuration is not limited to this configuration, and the width L1 may be smaller than the width L2. That is, when removing the repetition lever 240 from the support 210, the support connecting portion 248 may be hooked on the repetition lever support portion 214. In other words, the repetition lever 240 may be connected to the support 210 in a snap-fit manner.

3A and 3B, the recess 2482 has an open end portion with a width L1 in the radial direction of the repetition lever rotation shaft 2142 (or the longitudinal direction of the key 110), and the repetition lever rotation shaft 2142 has a width in the radial direction described above. Although the configuration having the diameter of L2 is exemplified, the configuration is not limited to this configuration. For example, the recess 2482 has an open end portion with a width L1 in both the radial direction and the axial direction of the repetition lever rotation shaft 2142, and the repetition lever rotation shaft 2142 has a width in both the radial direction and the axial direction of the repetition lever rotation shaft 2142. The structure which has the diameter of L2 may be sufficient. That is, the opening end of the recess 2482 may be circular and the repetition lever rotation shaft 2142 may be spherical. At this time, the opening end of the recess 2482 may be elliptical, and the repetition lever rotation shaft 2142 may be a spheroid.

3A and 3B exemplify a shape in which both the lower end portion of the repetition lever rotating shaft 2142 and the lower surface portion of the concave portion 2482 have curved surfaces, but the shape is not limited thereto. For example, the lower end portion of the repetition lever rotating shaft 2142 may have a curved surface as in FIGS. 3A and 3B, and the lower surface portion of the concave portion 2482 may be formed by a straight portion and a corner portion in a sectional view. As a more specific example, the lower surface portion of the recess 2482 may be V-shaped in a cross-sectional view. Further, the lower surface portion of the concave portion 2482 may have a curved surface as in FIG. 3, and the lower end portion of the repetition lever rotating shaft 2142 may be formed by a straight portion and a corner portion in a sectional view. As a more specific example, the lower end portion of the repetition lever rotating shaft 2142 may be V-shaped in a sectional view, or may be a linear shape extending in the vertical direction.

As described above, according to the keyboard device 1 according to the first embodiment of the present invention, it is possible to facilitate the assembly of the support assembly while ensuring the operation of the support assembly equivalent to the conventional one. Therefore, since the double escapement is realized with a simpler structure than a support assembly used for a general grand piano, it is possible to reduce the manufacturing cost while suppressing the influence on the touch feeling.

Further, the first arm 2802 presses the repetition lever 240 upward, and the rotation of the repetition lever 240 is restricted by the stopper 216, so that the repetition lever 240 can be prevented from coming off from the support 210. Further, since the width L1 of the opening end of the recess 2482 is larger than the width L2 of the repetition lever rotating shaft 2142, the repetition lever 240 can be further easily attached to and detached from the support 210. Further, the spring contact portion 242 protruding from the repetition lever 240 and the first arm 2802 come into contact with each other, so that the contact area between them can be reduced, and a smooth operation and an operation with less frictional noise can be obtained. Moreover, the support assembly 20 can be easily assembled by attaching the repetition lever 240 to the support 210 by a snap-fit method. Even when the snap-fit method is used, the first arm 2802 presses the repetition lever 240 upward, thereby suppressing the repetition lever 240 from coming off the support 210 due to an impact or the like, and suppressing rattling of the repetition lever 240. can do.

[Operation of Support Assembly 20]
Next, the movement of the support assembly 20 when the key 110 is pressed to the end position from the state where the key 110 is at the rest position (FIG. 1) will be described.

FIG. 4 is a side view for explaining the movement of the support assembly according to the embodiment of the present invention. 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 around the axis of the through hole 2109. When the support 210 rotates and moves upward, the large jack 2502 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 is equivalent to hammering by a hammer.

Just before this collision, the support 210 is further raised while the upward movement of the small jack 2504 is restricted by the regulating button 360. Therefore, the large jack 2502 rotates so as to be detached from the hammer roller 315. At this time, the upward movement of the extended portion 244 is also restricted by the regulating button 360. In this example, the regulating button 360 also has a function of a repetition regulating screw in a general grand piano action mechanism.

Thereby, the repetition lever 240 is rotated so as to approach the support 210 while being restricted from moving upward. By these operations, a double escapement mechanism is realized. FIG. 4 is a diagram showing this state. 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.

[Sound generation 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 corresponding to the measurement result.

FIG. 5 is a block diagram showing the configuration of the sound generation mechanism of the keyboard device according to one 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 speed 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
A repetition lever support portion 214A of the support 210A and a support connection portion 248A of the repetition lever 240A used in the keyboard device 1A according to the second embodiment of the present invention will be described with reference to FIGS. 6A and 6B. FIG. 6A is an enlarged side view of a repetition lever support portion and a support connection portion in a support assembly according to an embodiment of the present invention. FIG. 6B is an exploded view of a repetition lever support part and a support connection part in the support assembly according to the embodiment of the present invention. Here, FIG. 6A is a side view in a state where the support connecting portion 248A is locked to the repetition lever support portion 214A. FIG. 6B is a side view of the support connection portion 248A in a state where the support connection portion 248A is removed from the repetition lever support portion 214A. In the second embodiment, since components other than the repetition lever support portion 214A and the support connection portion 248A are the same as those in the first embodiment, description thereof is omitted here.

As shown in FIG. 6B, the repetition lever support 214A is provided with a recess 2146A that opens downward. By arranging the support connection portion 248A inside the recess 2146A, the repetition lever 240A is rotatably attached to the support 210A. Here, the support connection portion 248A is in contact with the recess 2146A from below the recess 2146A.

[Configuration of Repetition Lever Support 214A and Support Connection 248A]
The configuration of the repetition lever support portion 214A and the support connection portion 248A will be described in detail with reference to FIGS. 6A and 6B. As shown in FIG. 6B, the support connecting portion 248A includes a repetition lever rotating shaft 2486A and a connecting portion 2488A. The connecting portion 2488A connects the repetition lever rotating shaft 2486A and the repetition lever 240A. The upper end of the repetition lever rotation shaft 2486A has an arc shape. The recess 2146A provided in the repetition lever support 214A has an arc shape corresponding to the arc shape of the upper end of the repetition lever rotation shaft 2486A on the upper surface of the recess 2146A. The radius of curvature of the arc of recess 2146A is larger than the radius of curvature of the arc of rotation lever rotation shaft 2486A. Here, when the upper end portion of the repetition lever rotation shaft 2486A and the upper surface portion of the recess 2146A are not arcuate, but are oval or curved, the contact point between the upper end portion of the repetition lever rotation shaft 2486A and the upper surface portion of the recess 2146A. It may be designed so that the radius of curvature of both satisfies the above conditions. As shown in FIG. 6A, the recess 2146A is engaged with the repetition lever rotation shaft 2486A, so that the repetition lever 240A rotates about the repetition lever rotation shaft 2486A.

Here, the width L3 near the opening end of the recess 2146A is larger than the width L4 of the repetition lever rotating shaft 2486A. That is, when the repetition lever 240A is removed from the support 210A, the recess 2146A is not caught by the repetition lever rotation shaft 2486A, so that the support connection portion 248A can be smoothly removed from the repetition lever support portion 214A. 6A and 6B exemplify a configuration in which the width L3 is larger than the width L4, the present invention is not limited to this configuration, and the width L3 may be smaller than the width L4. That is, when removing the repetition lever 240A from the support 210A, the support connection portion 248A may be hooked on the repetition lever support portion 214A. In other words, the repetition lever 240A may be connected to the support 210A in a snap-fit manner.

6A and 6B exemplify a configuration in which the recess 2146A has an opening end portion with a width L3 in the direction of the diameter of the repetition lever rotation shaft 2486A, and the repetition lever rotation shaft 2486A has a diameter of the width L4 in the radial direction. However, it is not limited to this configuration. For example, the recess 2146A has an opening end portion with a width L3 in both the radial direction and the axial direction of the repetition lever rotation shaft 2486A, and the repetition lever rotation shaft 2486A has a width in both the radial direction and the axial direction of the repetition lever rotation shaft 2486A. The structure which has the diameter of L4 may be sufficient. That is, the opening end of the recess 2146A may be circular, and the repetition lever rotation shaft 2486A may be spherical. At this time, the opening end of the recess 2146A may be elliptical, and the repetition lever rotation shaft 2486A may be a spheroid.

As described above, according to the keyboard device 1A according to the second embodiment of the present invention, it is possible to facilitate the assembly of the support assembly while ensuring the operation of the support assembly equivalent to the conventional one. Therefore, since the double escapement is realized with a simpler structure than a support assembly used for a general grand piano, it is possible to reduce the manufacturing cost while suppressing the influence on the touch feeling.

Further, the support assembly 20A can be easily assembled by attaching the repetition lever 240A to the support 210A by locking the recess 2146A to the repetition lever rotating shaft 2486A. Further, since the width L3 of the opening end of the recess 2146A is larger than the width L4 of the repetition lever rotating shaft 2486A, the repetition lever 240A can be further easily attached to and detached from the support 210A.

<Third Embodiment>
[Configuration of Keyboard Device 1B]
A keyboard device 1B according to the third embodiment of the present invention is an example in which an example of a support assembly according to the present invention is applied to an electronic piano, similarly to the keyboard device 1 according to the first embodiment. The keyboard device 1B is similar to the keyboard device 1, but the support assembly and the support structure of the support assembly are different. Further, the keyboard device 1B is different from the keyboard device 1 in a method of restricting the upward rotation of the repetition lever provided in the support assembly. In the following description, the differences will be mainly described, and description of common parts will be omitted.

FIG. 7 is a side view showing a configuration of a keyboard apparatus according to an 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 the support assembly 20 in the first embodiment, the shaft supported by the support flange 290 passes through the through hole 2109 and is supported so as to be rotatable. On the other hand, 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 repetition regulating screw 346 restricts the rotation of the support assembly 60 upward (on the hammer shank 310 side). The support rail 960 is an example of a frame that serves as a reference for rotation of the support assembly 60. The frame may be formed of one member like 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 a member independent for each key 110.

[Configuration of Support Assembly 60]
FIG. 8 is a side view showing the configuration of the support assembly according to the embodiment of the present invention. The support assembly 60 of the keyboard device 1B includes a support 610, a repetition lever 640, a jack 650, an operation restricting portion 660, and a coil spring 680. The support 610 and the repetition lever 640 are attached by the support connection portion 648 connected to the repetition lever 640 being engaged with the repetition lever support portion 614 connected to the support 610. The repetition lever 640 is rotatably supported with respect to the support 610 by the locking of the support connection portion 648 and the repetition lever support portion 614. The details of the configuration in which the repetition lever support 614 supports the repetition lever 640 will be described later. The support assembly 60 is a resin 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 coil spring 680 and other members.

The support 610 is supported so as to be rotatable with respect to the support rail 960. The jack 650 is rotatably disposed on the support 610. The jack 650 has a large jack 6502 and a small jack 6504. The large jack 6502 is disposed so as to be able to pass through a slit 642 provided in the repetition lever 640, and the small jack 6504 extends from the support 610 to the front side of the performer. The operation restricting portion 660 is disposed on the side of the support lever 640 that is the repetition lever 640.

Further, the support 610 includes a support heel 612, a repetition lever support portion 614, a frame fixing portion 632, a flexible portion 634, and a base 638. The repetition lever support part 614 protrudes upward from the support 610. The shape of the repetition lever support portion 614 is the same as that of the repetition lever support portion 214 shown in FIG. The frame fixing unit 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). The flexible portion 634 is formed integrally with the support 610 and the frame fixing portion 632. The flexible portion 634 is thinner than at least the support 610 in the rotation direction of the support assembly 60 or the thickness direction of the flexible portion 634. 8 illustrates 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 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 repetition lever 640 side of the support 610. On the upper surface (on the side of the repetition lever 640) of the pedestal 638, a coil spring 682 acting on the pedestal 638 and the repetition lever 640, and a large jack stopper 6382 that restricts the rotation of the jack 650 in the direction in which the large jack 6502 approaches the pedestal 638. And are provided. Here, a part of the large jack 6502 that comes into contact with the large jack stopper 6382 can also be called a jack rotation stopper 6564. 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 includes a slit 642, an extending portion 644, and a support connecting portion 648. The support connecting portion 648 and the extending portion 644 extend from the repetition lever 640 to the support 610 side. Support connection 648 is coupled to one end of repetition lever 640. The support connection portion 648 is provided with a recess 6482 having an open end on the upper side. The repetition lever support portion 614 is disposed inside the recess 6482 so that the repetition lever 640 is attached to the support 610 so as to be rotatable. Here, the concave portion 6482 is in contact with the repetition lever support portion 614 from below the repetition lever support portion 614. The shape of the support connection portion 648 is the same as that of the support connection portion 248 shown in FIG.

The slit 642 is provided at a position where the large jack 6502 can pass through a part of the player's front side from the repetition lever support portion 614 that is the rotation center of the repetition lever 640. The extending portion 644 is coupled to the support 610 side of the repetition lever 640 on the jack 650 side from the repetition lever support portion 614 that is the rotation center of the repetition lever 640. Further, the extending portion 644 has

slits

6442 and 6444.

The jack 650 is disposed so as to be rotatable with respect to the support 610 by connecting the support connection portion 6505 between the jack large 6502 and the jack small 6504 to the jack support portion 6105 of the support 610. A part of the large jack 6502 is provided with a spring contact portion 6562 to which a coil spring 684 is connected. The coil spring 684 is a tension spring that acts on the jack large 6502 and the support 610 in a direction in which the jack large 6502 approaches the pedestal 638 and functions as an elastic body that imparts rotational force to the jack 650.

The support 610 includes two plate-like members that sandwich the jack support portion 6105 from both sides on the front side of the player from the base 638. A support connection portion 6505 and a part of a coil spring 684 are provided between the two plate-like members. In order to suppress yawing and rolling of the jack 650, the jack 650 and the support 610 may be in sliding contact with each other in at least a part of the space sandwiched between the two plate-like members.

The operation restricting portion 660 is provided on the side opposite to the flexible portion 634 with respect to the repetition lever support portion 614. 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 on the extended portion 662 and extend from the extended portion 662 toward the player. In other words, it can be said that the stopper 664 and the guide 666 are protrusions that protrude from the extended 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. 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 shape provided with a groove in which the stopper 664 and the guide 666 can be locked. The

slits

6442 and 6444 can also be referred to as locking portions.

9A and 9B are side views showing the configuration of the stopper and guide of the support assembly according to the embodiment of the present invention. The side views shown in FIGS. 9A and 9B are views showing only the extending portion 644, the stopper 664, and the guide 666 in the side view seen from the direction D1 in FIG. FIG. 9A is a side view showing the configuration of the stopper and guide of the support assembly at the rest position according to the embodiment of the present invention. FIG. 9B is a side view showing the configuration of the stopper and guide of the support assembly at the end position according to the embodiment of the present invention. The stopper 664 has a length in the direction intersecting the rotation direction of the repetition lever 640 and the extending portion 644. In addition, the guide 666 and the slit 6444 are long in the rotation direction of the repetition lever 640 and the extending portion 644. Since the guide 666 has the groove V6 with respect to the inner wall of the slit 6444, the area where the guide 666 and the slit 6444 are in sliding contact with each other is reduced. Grease may be applied to the groove V6.

Here, in the state of the rest position shown in FIG. 8 and FIG. 9A, the extending 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 extending portion 644 is in contact with the operation restricting portion 660 from below the operation restricting portion 660. That is, the stopper 664 or the operation restricting portion 660 is a restricting means for restricting the rotation of the repetition lever 640 and the extending portion 644 toward the hammer shank 310 (upward). In the present embodiment, the coil spring 682 presses the repetition lever 640 upward, and the rotation of the repetition lever 640 is restricted by the stopper 664, so that the repetition lever 640 can be prevented from coming off the support 610. . Even if a buffer material or the like (nonwoven fabric, elastic body, etc.) is provided between the extended portion 644 and the stopper 664 to reduce noise generated when the extended portion 644 and the stopper 664 come into contact with each other. Good.

Further, the extending portion 644 is in contact with the guide 666 from the side at the slit 6444. Here, the side is a direction in which the support assemblies 60 are adjacent to each other, or a direction in which the support rail 960 is extended. In other words, the extended portion 644 is in contact with the operation restricting portion 660 from the side. That is, the guide 666 or the operation restricting unit 660 suppresses yawing and rolling of the repetition lever 640. Grease may be applied between the extending portion 644 and the guide 666 so that the extending portion 644 and the guide 666 can slide smoothly.

8, 9 </ b> A, and 9 </ b> B exemplify a configuration in which a slit is provided in the extended portion 644 connected to the repetition lever 640 and a protrusion is provided in the extended portion 662 connected to the support 610. The configuration is not limited to this. For example, the extending portion 662 may be provided with a slit, and the extending portion 644 may have a protruding portion that passes through the slit.

As described above, according to the keyboard device 1B according to the third embodiment of the present invention, the same effects as those of the keyboard device 1 according to the first embodiment can be obtained.

[Operation of Support Assembly 60]
Next, the movement of the support assembly 60 when the key 110 is pressed to the end position from the state where it is in the rest position (FIG. 7) will be described.

FIG. 10 is a side view for explaining the movement of the support assembly according to the embodiment of the present invention. When the key 110 is pushed down to the end position, the capstan screw 120 pushes up the support heel 612 to rotate the support 610 about the axis of the flexible portion 634. When the support 610 rotates and moves upward, the large jack 6502 pushes up the hammer roller 315 and the hammer shank 310 collides with the hammer stopper 410.

Just before this collision, the support 610 is further raised while the upward movement of the small jack 6504 is restricted by the regulating button 360. Therefore, the large jack 6502 rotates so as to be detached from the hammer roller 315. At this time, the upward movement of the repetition lever 640 is restricted by the repetition regulating screw 346. Thereby, the repetition lever 640 is rotated so that the upward movement is restricted and approaches the support 610. By these operations, a double escapement mechanism is realized. FIG. 10 is a diagram showing 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 large jack 6502 is returned below the hammer roller 315.

In the embodiment described above, an electronic piano is shown as an example of a keyboard device 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 this case, the sound generation mechanism corresponds to a hammer and a string.

It should be noted that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

1: Keyboard device, 20, 60: Support assembly, 50: Sound generation mechanism, 110: Key, 120: Capstan screw, 210, 610: Support, 212, 612: Support heel, 214, 614: Repetition lever support, 216 , 664: stopper, 218: spring support part, 220, 634: flexible part, 240, 640: repetition lever, 242: spring contact part, 244, 644, 662: extension part, 246: rib, 248, 648: Support connection part, 250, 650: Jack, 256: Protruding part, 280: Torsion coil spring, 290: Support frenzy, 310: Hammer shank, 315: Hammer roller, 320 Hammer, 346: Repetition regulating screw, 360: Regulating button, 390: Shank frenzy, 410: Hammer stopper, 510: Sensor, 520: Shield plate, 550: Signal conversion unit, 560: Sound source unit, 570: Output unit, 632: Frame fixing part, 638: Pedestal, 642, 6442, 6444: Slit, 660: Operation restriction part, 666: Guide, 680, 682, 684: Coil spring, 900: Bracket, 910: Balance rail, 920: Support rail , 930: Shank rail, 940: hammer stopper rail, 950: sensor rail, 960: support rail, 2101: first body part, 2102: Bent part, 2103: Second body part, 2105, 6105: Jack support part, 2109: Through hole, 2142, 2486: Repetition lever rotating shaft, 2144, 2488: Connection part, 2146, 2482: Recessed part, 2441: Inside Part, 2442: outer part, 2443: coupling part, 2444: stopper contact part, 2502, 6502: jack large, 2504, 6504: jack small, 2505, 6505: support connection part, 2506, 6482: concave part, 2562, 6562: Spring contact portion, 2564, 6564: jack rotation stopper, 2802: first arm, 2804: second arm, 2806: coil, 6382: large jack stopper, P1, P2: protrusion, SP: space, V6: groove

Claims

A support arranged pivotably with respect to the frame;
A repetition lever support connected to the support;
A depression lever provided with a recess, and the repetition lever support portion disposed inside the recess so as to be pivotally attached to the support,
An action part fixed to the repetition lever and receiving an upward action;
A support assembly comprising:
2. The support assembly according to claim 1, further comprising a repetition lever pressing portion that comes into contact with the action portion from below and presses the repetition lever upward.
The support assembly according to claim 2, wherein the repetition lever pressing portion is an elastic member connected to the support.
The repetition lever includes a protruding portion protruding from the repetition lever,
The support assembly according to claim 3, wherein the action portion is provided on the projecting portion.
The support assembly according to claim 1, wherein the concave portion is in contact with the repetition lever support portion from below.
The support assembly according to claim 1, further comprising a restricting means for restricting the upward rotation of the repetition lever.
The support assembly according to claim 1, wherein a width of an opening end portion of the concave portion is larger than a width of the repetition lever support portion.
A support arranged pivotably with respect to the frame;
A depression lever support portion provided with a recess and connected to the support;
A repetition lever pivotally attached to the support;
A support connection portion connected to the repetition lever and disposed inside the recess;
An action part fixed to the repetition lever and receiving an upward action;
A support assembly comprising:
The support assembly according to claim 8, further comprising a repetition lever pressing portion that contacts the action portion from below and presses the repetition lever upward.
The support assembly according to claim 9, wherein the repetition lever pressing portion is an elastic member connected to the support.
The repetition lever includes a protruding portion protruding from the repetition lever,
The support assembly according to claim 10, wherein the action portion is provided on the protrusion.
The support assembly according to claim 8, wherein the support connection portion contacts the concave portion from below.
9. The support assembly according to claim 8, further comprising restricting means for restricting upward rotation of the repetition lever.
The support assembly according to claim 8, wherein the width of the opening end portion of the recess is larger than the width of the support connection portion.