JP2016224356A - Support assembly and keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a support assembly while suppressing the change of touch feeling during an operation of a key.SOLUTION: A support assembly includes: a support 210 disposed turnably with respect to a frame; a repetition lever 240 disposed turnably with respect to the support 210; an elastic member 280 (torsion coil spring) that acts on the repetition lever 240 at a first point and acts on a jack 250 at a second point; and a support member 218 including a first support part fixed to the support 210 and a second support part whose one side is connected to the first support part and the other side is opened and that supports a third point of the elastic member 280.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a support assembly used in 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 Patent Document 1, 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 action mechanism provides 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 a support assembly while suppressing a change in touch feeling when operating a key, as compared with a keyboard device of an acoustic piano.

  A support assembly according to an embodiment of the present invention acts on a repetition lever at a first point, a support arranged to be rotatable with respect to the frame, a repetition lever arranged to be rotatable with respect to the support, and the first point. A second member that supports the elastic member at the third point, an elastic member that acts on the jack at the second point, a first support portion fixed to the support, and one that is connected to the first support portion and the other is open. And a support member including a support portion.

  The support and the first support part and the second support part may be integrally formed.

  The second support portion has a length in the first direction intersecting the first point or a line connecting the second point and the third point, and restricts movement of the elastic member in the first direction to the other opened side. You may have a stopper to do.

  The elastic member may be biased in a second direction that intersects the first direction at the third point.

  The stopper may extend from the second support portion to the opposite side in the second direction.

  In the other opened side, the second support portion may have a shape in which the side opposite to the side where the stopper is provided is inclined toward the direction of the stopper.

  The elastic member includes an annular portion that contacts the second support portion at the third point inside, a first rod-shaped portion that acts on the repetition lever at the first point, and a second rod-shaped portion that acts on the jack at the second point. You may have.

  According to the 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 a perspective view which shows the structure of the support assembly which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of the spring support part in the support assembly which concerns on one Embodiment of this invention. It is a top view which shows the structure of the spring support part in the support assembly which concerns on one Embodiment of this 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 a perspective view which shows the structure of the spring support part in the support assembly which concerns on one Embodiment of this invention. It is a top view which shows the structure of the spring support part in the support assembly which concerns on one Embodiment of this invention. It is a top view which shows the structure of the spring support part in the support assembly which concerns on one Embodiment of this invention. It is a top view which shows the structure of the spring support part in the support assembly which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of the elastic member in the support assembly which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of the elastic member in 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 of 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. 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 pivotally 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 coupled via the flexible portion 220. The repetition lever 240 is supported by the flexible portion 220 so as to be rotatable with respect to the support 210. The support assembly 20 is a resin structure manufactured by injection molding or the like except for the cushioning material (nonwoven fabric, elastic body, etc.) provided at the portion that collides with the torsion coil spring 280 and other members. 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 formed on one end side and a jack support portion 2105 formed on the other end side. 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. A shaft supported by the support flange 290 is passed through the through hole 2109. As a result, 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. The details of the configuration in which the spring support portion 218 supports the torsion coil spring 280 will be described later.

  A space SP is formed between the through hole 2109 and the jack support 2105 on the jack support 2105 side from the support heel 212. For convenience of explanation, the support 210 is divided into 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).

  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 extending 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. A rib 246 is provided at a portion where the inner portion 2441 and the repetition lever 240 are coupled. 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. That is, it can be said that the extended portion 244 intersects the jack 250. One or both of the inner portion 2441 and the large jack 2502 may be provided with a protrusion that reduces the contact area between the two. The protrusion may be point-shaped or linear.

  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 connecting portion 2443 sandwiches the small jack 2504 from both side surfaces. Here, one or both of the coupling portion 2443 and the small jack 2504 may be provided with a protrusion that reduces the contact area between the two. The 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 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 protrusion 256. 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 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 its side surface. The spring contact portion 2562 contacts the second arm 2804 of the torsion coil spring 280.

  The torsion coil spring 280 has a rod-shaped first arm 2802, second arm 2804, and 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 296 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. That is, the torsion coil spring 280 acts on the repetition lever 240 at the first action point 292. 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. That is, the torsion coil spring 280 acts on the jack 250 at the second action point 294.

  FIG. 3 is a perspective view showing a configuration of a support assembly according to an embodiment of the present invention. Here, the shape of the spring support portion 218 and the torsion coil spring 280 and the configuration in which the torsion coil spring 280 is supported by the spring support portion 218 will be described in detail.

  As shown in FIG. 3, the spring support portion 218 includes a first support portion 2182, a second support portion 2184, and a spring stopper 2186. The first support portion 2182 is fixed to the side end portion of the support 210 opposite to the D1 direction. One of the second support portions 2184 (the opposite side in the D1 direction) is connected to the first support portion 2182, and the other (side in the D1 direction) is open. The second support portion 2184 has a length in the D1 direction. That is, the spring support 218 supports the torsion coil spring 280 with a cantilever structure. Here, the direction D1 is defined as a direction intersecting with a straight line connecting the first action point 292 and the fulcrum 296 or a straight line connecting the second action point 294 and the fulcrum 296. In FIG. 3, the D1 direction is defined as the direction in which the keys are adjacent. The spring stopper 2186 is provided at the open end of the second support portion 2184. However, the spring stopper 2186 is not essential, and the spring stopper 2186 may be omitted.

  The second support portion 2184 passes through the inside of the coil 2806 and supports the torsion coil spring 280. That is, the second support portion 2184 supports the coil 2806 from the inside. Further, the outer diameter of the second support portion 2184 is smaller than the inner diameter of the coil 2806. Therefore, in a state where the torsion coil spring 280 is supported by the second support portion 2184, a gap is provided between the second support portion 2184 and the coil 2806 except for the fulcrum 296.

  Referring to FIGS. 2 and 3, the first arm 2802 acts on the spring contact portion 242 above and on the player's back side, and the second arm 2804 on the spring contact portion 2562 below and on the player's back side. Works. As a result, the coil 2806 is attracted to the front side of the performer and is urged in the D2 direction at the fulcrum 296 with respect to the second support portion 2184. Here, the D2 direction is defined as a direction intersecting the D1 direction. In FIG. 3, the D2 direction is defined as a direction orthogonal to the D1 direction, that is, the D2 direction is defined as the longitudinal direction of the key and the support. However, the D2 direction is defined other than the direction orthogonal to the D1 direction. May be. 2 and 3 exemplify the configuration in which the coil 2806 is biased in the D2 direction, but the configuration is not limited to this. For example, the coil 2806 may be biased in the direction opposite to the D2 direction or in the vertical direction (the direction from the second support portion 2184 toward the repetition lever 240 or the support 210).

  The spring stopper 2186 restricts the movement of the torsion coil spring 280 in the D1 direction. The spring stopper 2186 has a shape protruding from the end in the D1 direction of the second support portion 2184 in a direction intersecting the D1 direction. More specifically, the spring stopper 2186 is a direction orthogonal to the longitudinal direction (D1 direction) of the second support portion 2184 and protrudes in the direction opposite to the D2 direction. Here, the direction in which the spring stopper 2186 protrudes is not limited to the direction shown in FIGS. 2 and 3, and may be protruded in the direction opposite to the direction in which the coil 2806 is urged.

  Although FIG. 3 illustrates a structure in which the first support portion 2182, the second support portion 2184, and the spring stopper 2186 are integrally formed, the present invention is not limited to this structure. For example, the first support portion 2182, the second support portion 2184, and the spring stopper 2186 may be formed of different parts, and may be bonded or joined to each other. The above is the description of the configuration of the support assembly 20.

[Configuration of Spring Support 218]
The configuration of the spring support portion 218 will be described in detail with reference to FIGS. 4 and 5. FIG. 4 is a perspective view showing a configuration of a spring support portion in the support assembly according to the embodiment of the present invention. FIG. 5 is a top view showing the configuration of the spring support portion in the support assembly according to the embodiment of the present invention.

  As shown in FIG. 4, the 1st support part 2182 has a shape which a skirt spreads while curving, and has a shape connected to the support 210 in a wide area | region. As a result, the spring support 218 is firmly fixed to the support 210. The second support portion 2184 has a cylindrical shape, and the center axis of the circle extends in the D1 direction. The spring stopper 2186 extends in the direction opposite to D2 and upward, and the tip 2188 is curved. In FIG. 4, the distal end portion 2188 is an arc, and the curvature radius of the distal end portion 2188 is larger than the curvature radius of the second support portion 2184 and the curvature radius inside the coil 2806 of the torsion coil spring 280. Since the spring stopper 2186 has the above-described shape, the coil 2806 can be prevented from being detached from the second support portion 2184.

  Here, in FIG. 4, the second support portion 2184 has a cylindrical shape and is illustrated as being fixed to the first support portion 2182. However, the present invention is not limited to this structure. For example, the second support portion 2184 may be attached to the first support portion 2182 so as to be rotatable about a rotation axis extending in the D1 direction. Moreover, the 2nd support part 2184 should just have a longitudinal direction in D1 direction, and is not limited to a cylindrical shape. For example, the shape may be a polygon such as a triangle or a quadrangle, a cross shape, or a star shape.

  As shown in FIG. 5, the angle (boundary portion 2189) formed by the second support portion 2184 and the spring stopper 2186 is a right angle. The angle at the boundary 2189 may not be a right angle but may be an acute angle (a shape in which the spring stopper 2186 is inclined toward the first support portion 2182). The distance between the end 2185 of the second support 2184 opposite to the spring stopper 2186 and the boundary 2189 is shorter than the inner diameter of the coil 2806.

  Here, in FIG. 5, the structure in which the spring stopper 2186 is disposed at the end portion in the D1 direction of the second support portion 2184 is illustrated, but may be disposed at a location other than the end portion. In FIG. 5, the boundary portion 2189 is connected so as to form a corner, but the boundary portion 2189 may be curved. The spring support 218 can take various other forms, details of which will be described later. The above is the description of the configuration of the spring support portion 218.

[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. 6 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.

  Immediately before the collision, the regulating button 360 restricts the upward movement of the small jack 2504 and further raises the support 210 (jack support portion 2105). Therefore, the large jack 2502 rotates so as to be detached from the hammer roller 315. At this time, the upward movement of the coupling portion 2443 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 that the upward movement is restricted and approaches the support 210. By these operations, a double escapement mechanism is realized. FIG. 6 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.

  As described above, according to the keyboard device 1 according to the first embodiment of the present invention, it is possible to reduce the number of parts constituting 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, since the spring support portion 218 supports the torsion coil spring 280 with a cantilever structure, the number of parts can be reduced as compared with the conventional case, and the assembly of the support assembly 20 can be facilitated. Further, since the support 210, the first support portion 2182, and the second support portion 2184 are integrally formed, the number of parts can be reduced as compared with the conventional case. In addition, since the second support portion 2184 has a length in the D1 direction, the contact area between the coil 2806 and the second support portion 2184 can be widened, so that the torsion coil spring 280 is stably supported. be able to. Further, since the spring stopper 2186 is provided at the open end of the second support portion 2184, it is possible to suppress the torsion coil spring 280 from being detached from the spring support portion 218.

  In addition, since the torsion coil spring 280 is biased in the D2 direction, a region in which the coil 2806 and the second support portion 2184 are in sliding contact with each other is restricted, so that generation of noise due to the operation of the support 210 is suppressed. be able to. Further, since the torsion coil spring 280 is biased in the D2 direction, the spring stopper 2186 may be protruded in the direction opposite to the D2 direction, and the spring support portion 218 can be formed with a simple structure. Can be easy to assemble.

[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. 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
A spring support portion 218A of the support 210A used in the keyboard device 1A according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a perspective view showing a configuration of a spring support portion in the support assembly according to the embodiment of the present invention. FIG. 9 is a top view showing the configuration of the spring support portion in the support assembly according to the embodiment of the present invention. In the second embodiment, the components other than the spring support portion 218A are the same as those in the first embodiment, and thus the description thereof is omitted here.

[Configuration of Spring Support 218A]
Comparing the spring support 218A shown in FIGS. 8 and 9 with the spring support 218 shown in FIGS. 4 and 5, the second support 2184A of the spring support 218A is located at the end 2185 of the second support 2184. The spring support 218 is different from the spring support 218 in that a notch 270 is provided at a corresponding portion. In other words, the second support portion 2184A has a shape in which the side opposite to the side where the spring stopper 2186A is provided (notch 270) is inclined toward the direction of the spring stopper 2186A at the opened end. It can also be said. In FIG. 9, the distance between the stopper end 272 of the spring stopper 2186 </ b> A and the notch end 274 of the notch 270 is shorter than the inner diameter of the coil 2806.

  Here, FIG. 9 illustrates a structure in which the notch 270 has a linear shape, but is not limited to this structure. The notch 270 may have a curved shape or a shape having irregularities.

  As described above, since the notch 270 is provided in the second support portion 2184A, the torsion coil spring 280 can be easily attached to and detached from the spring support portion 218A. Further, by making the notch 270 in a curved shape, the torsion coil spring 280 can be smoothly attached to the spring support portion 218. In addition, by making the notch 270 uneven, it is possible to prevent the torsion coil spring 280 from being detached from the spring support portion 218.

<Third Embodiment>
A spring support portion 218B of the support 210B used in the keyboard device 1B according to the third embodiment of the present invention will be described with reference to FIG. FIG. 10 is a top view showing the configuration of the spring support portion in the support assembly according to the embodiment of the present invention. In the third embodiment, since components other than the spring support portion 218B are the same as those in the first embodiment, description thereof is omitted here.

[Configuration of Spring Support 218B]
When the spring support portion 218B shown in FIG. 10 is compared with the spring support portion 218 shown in FIG. 5, the second support portion 2184B of the spring support portion 218B has a shape in which a cylinder is bent at the concave portion 276, and the spring stopper The spring support portion 218 is different from the spring support portion 218 in that a protrusion portion such as 2186 is not provided. The second support portion 2184 </ b> B has a shape in which a cylinder is bent at the position of the recessed portion 276, and the recessed portion 276 is located in the direction D <b> 2 with respect to the distal end portion 278.

  Since the recess 276 functions as a stopper in the second support portion 2184B, the second support portion 2184B closer to the distal end portion 278 than the recess 276 can also be referred to as a stopper. In the support assembly 20B of the third embodiment, the coil 2806 of the torsion coil spring 280 is urged in the direction D2 in the same manner as the support assembly 20 of the first embodiment. The inclination to the portion 278 restricts the torsion coil spring 280 from moving in the D1 direction.

  Here, FIG. 10 illustrates the structure in which the stopper is realized by the shape of the second support portion 2184B, but the structure is not limited to this structure. For example, a stopper that protrudes to the opposite side of the D2 direction may be separately provided on the tip portion 278. 10 illustrates the structure in which only one recess 276 is formed in the second support portion 2184B, but a plurality of recesses may be formed in the second support portion 2184B.

  As described above, since the second support portion 2184B has a cylindrical shape including the recess 276, the torsion coil spring 280 can be easily attached to and detached from the spring support portion 218B. Further, by providing a plurality of recesses 276 in the second support portion 2184B, it is possible to prevent the torsion coil spring 280 from being detached from the spring support portion 218.

<Fourth embodiment>
A spring support portion 218C of the support 210C used in the keyboard device 1C according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a top view showing the configuration of the spring support portion in the support assembly according to the embodiment of the present invention. In the fourth embodiment, the components other than the spring support portion 218C are the same as those in the first embodiment, and thus the description thereof is omitted here.

[Configuration of Spring Support 218C]
The spring support portion 218C shown in FIG. 11 is similar to the spring support portion 218B shown in FIG. 10, but the second support portion 2184C of the spring support portion 218C is a spring in that the axis of the cylinder has a curved shape. The support portion 218C is different from the spring support portion 218B. The second support portion 2184C has a concave shape so as to draw a curve in the D2 direction, and the concave portion 286 is located in the D2 direction with respect to the distal end portion 288.

  Similarly to the spring support portion 218B, in the second support portion 2184C, the concave portion 286 functions as a stopper. Therefore, the second support portion 2184C closer to the distal end portion 288 than the concave portion 286 can also be called a stopper. Here, the concave portion 286 indicates a position that is most concave in the D2 direction in the curved second support portion 2184C. In the support assembly 20C of the fourth embodiment, the coil 2806 of the torsion coil spring 280 is urged in the direction D2 in the same manner as the support assembly 20 of the first embodiment, so that the front end from the recess 286 of the second support portion 2184C. The inclination to the portion 288 restricts the movement of the torsion coil spring 280 in the D1 direction.

  Here, in FIG. 11, the structure in which the stopper is realized by the shape of the second support portion 2184C is illustrated, but the structure is not limited to this structure. For example, a stopper that protrudes to the opposite side of the D2 direction may be separately provided on the tip portion 288. 11 illustrates the structure in which only one recess 286 is formed in the second support portion 2184C, but a plurality of recesses may be formed in the second support portion 2184C.

  As described above, since the second support portion 2184C has a cylindrical shape including the recess 286, the torsion coil spring 280 can be easily attached to and detached from the spring support portion 218C. Further, by providing a plurality of recesses 286 in the second support portion 2184C, it is possible to prevent the torsion coil spring 280 from being detached from the spring support portion 218.

<Fifth Embodiment>
An elastic member 600 used in place of the torsion coil spring of the support 210 in the support 210D of the keyboard device 1D according to the fifth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a perspective view showing the configuration of the elastic member in the support assembly according to the embodiment of the present invention. In the fifth embodiment, the components other than the elastic member 600 are the same as those in the first embodiment, and thus the description thereof is omitted here.

[Configuration of Elastic Member 600]
As shown in FIG. 12, the elastic member 600 includes a rod-shaped first arm 610, a second arm 620, and an annular ring 630. The first arm 610 and the second arm 620 are bonded or joined to the ring 630. The ring 630 is supported by a spring support portion 218, the first arm 610 contacts the spring contact portion 242 and acts on the repetition lever 240, and the second arm 620 contacts the spring contact portion 2562 and acts on the jack 250.

  The first arm 610, the second arm 620, and the ring 630 are not limited to the shapes shown in FIG. For example, the first arm 610 and the second arm 620 may be flat. Further, the ring 630 may be cylindrical. Moreover, the part corresponding to the ring 630 does not necessarily need to be annular, and may have a shape (C-shape) in which a part of the ring 630 is opened.

<Sixth Embodiment>
An elastic member 700 used in place of the torsion coil spring of the support 210 in the support 210E of the keyboard device 1E according to the sixth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a perspective view showing the configuration of the elastic member in the support assembly according to the embodiment of the present invention. In the sixth embodiment, the components other than the elastic member 700 are the same as those in the first embodiment, and thus the description thereof is omitted here.

[Configuration of Elastic Member 700]
As shown in FIG. 13, the elastic member 700 has a flat plate-like first arm 710, second arm 720, and curved portion 730. The first arm 710 contacts the spring contact portion 242 and acts on the repetition lever 240, and the second arm 620 contacts the spring contact portion 2562 and acts on the jack 250. The bending portion 730 is supported by the spring support portion 218 by being biased in the D2 direction by the action of the first arm 710 and the second arm 720 described above.

  As described above, by using the spring support portion 218 in a cantilever structure, various shapes of elastic members can be used in place of the torsion coil spring 280 as shown in the fifth and sixth embodiments. .

  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.

  Note 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: support assembly, 50: sound generating mechanism, 110: key, 120: capstan screw, 210: support, 212: support heel, 216: stopper, 218: spring support, 220: flexible part, 240: repetition lever, 242: spring contact portion, 244: extension portion, 246: rib, 250: jack, 256: protrusion, 270: notch, 272: stopper end, 274: notch end, 276: Concave part, 278: tip part, 280: torsion coil spring, 286: concave part, 288: tip part, 290: support flange, 292: first action point, 294: second action point, 296: fulcrum, 310: hammer shank, 315: Nama Roller, 320: Hammer, 360: Regulating Button, 390: Shank Frange, 410: Hammer Stopper, 510: Sensor, 520: Shielding Plate, 550: Signal Conversion Unit, 560: Sound Source Unit, 570: Output Unit, 600, 700 : Elastic member, 610, 710: First arm, 620, 720: Second arm, 630: Ring, 730: Curved part, 900: Bracket, 910: Balance rail, 920: Support rail, 930: Shank rail, 940: Hammer stopper rail, 950: sensor rail, 2101: first body portion, 2102: bent portion, 2103: second body portion, 2105: jack support portion, 2109: through hole, 2182: first support portion, 2184: first 2 support part, 2185: end part, 2186: spring stopper, 2188: tip part, 2189: boundary part, 2441: inner part, 2442: outer part, 2443: coupling part, 2444: stopper contact part, 2502: jack large, 2504: Jack small, 2505: Support connection part, 2562: Spring contact part, 2802: First arm, 2804: Second arm, 2806: Coil, SP: Space

Claims (8)

A support arranged pivotably with respect to the frame;
A repetition lever arranged to be rotatable with respect to the support;
An elastic member acting on the repetition lever at a first point and acting on a jack at a second point;
A first support portion fixed to the support, and a support member including a second support portion, one of which is connected to the first support portion, the other is opened, and supports the elastic member at a third point;
A support assembly comprising:   The support assembly according to claim 1, wherein the support, the first support portion, and the second support portion are integrally formed. The second support part is
Having a length in a first direction intersecting a line connecting the first point or the second point and the third point;
The support assembly according to claim 1, further comprising: a stopper that restricts movement of the elastic member in the first direction on the other of the opened ones.   The support assembly according to claim 3, wherein the elastic member is biased in a second direction intersecting the first direction at the third point.   The support assembly according to claim 4, wherein the stopper extends from the second support portion to an opposite side in the second direction.   The said 2nd support part has the shape where the opposite side to the side in which the said stopper was provided in the said other open side inclined toward the direction of the said stopper. Support assembly. The elastic member is
An annular portion in contact with the second support portion at the third point inside;
A first rod-like portion acting on the repetition lever at the first point;
A second rod-like portion acting on the jack at the second point;
The support assembly according to claim 5, comprising: A plurality of support assemblies according to any one of claims 1 to 7;
A key disposed corresponding to each of the support assemblies for rotating the support;
A sounding mechanism that sounds in response to pressing of the key;
A keyboard device comprising:

Images