Keyboard device

Abstract

Provided is a keyboard device in which the impact on the aesthetics of a musical instrument is reduced even if a key is deformed from a designed shape by a manufacturing error. This keyboard device has a first key having length in a first direction, an attachment part fixed to a frame, and a first connection part that fixes the first key to the frame at a pivot fulcrum side of the first key, wherein the position of the tip end of the first key in a second direction, which intersects the pivot plane of the first key, is determined by the first connection part being attached to the attachment part such that the first connection part is pressed from a direction in the plane including the first direction and the second direction so as to be bent by the attachment part.

Description

[Technical field]

[0001] An embodiment of the present invention relates to a keyboard device, and more particularly to a keyboard device having a mechanism for correcting the position of a key in a scale direction at a key attachment portion. [Background technology]

[0002] A keyboard device has a number of keys arranged side by side. The accuracy of the arrangement of the keys has a large impact on the aesthetic appearance of the instrument. Therefore, if the shape of the keys is deformed due to manufacturing errors from the design, the aesthetic appearance of the instrument is deteriorated. Therefore, technologies have been developed to adjust the position of the keys even if manufacturing errors occur in the shape of the keys (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5206966 [Patent Document 2] Patent No. 5489071 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of keyboard devices such as those shown in Patent Documents 1 and 2, it is necessary to adjust the position of the keys for each keyboard device according to the manufacturing error of the keys. Therefore, even if the variation in the manufacturing error of the keys is small and all the keys deform in the same direction by the same amount (in other words, even if the shape of the keys differs from the design but is the same shape every time), it is necessary to perform the same adjustment for all the keyboard devices every time.

[0005] One object of one embodiment of the present invention is to provide a keyboard device that reduces the impact on the aesthetic appearance of the musical instrument even if the keys are deformed from their designed shape due to manufacturing errors. [Means for solving the problem]

[0006] A keyboard device according to one embodiment of the present invention has a first key having a length in a first direction, an attachment portion fixed to a frame, and a first connection portion fixing the first key to the frame on the side of the rotation fulcrum of the first key, and the position of the tip of the first key in the second direction is determined by attaching the first connection portion to the attachment portion in a state in which the first connection portion is pressed so as to be bent by the attachment portion from a direction on a plane that includes the first direction and a second direction that intersects the rotation plane of the first key.

[0007] The key may further include a second key having a longitudinal axis in the first direction and aligned with the first key in the second direction, and the first connection portion connects the first key and the second key and fixes them to the frame, and the first connection portion is attached to the mounting portion in a state in which the first connection portion is pressed so as to be bent by the mounting portion from a direction on the plane, thereby changing the distance between the tip of the first key and the tip of the second key.

[0008] The first connection portion includes a first key position correction portion provided for the first key, A direction in which the first key position correction portion is pressed by the mounting portion may be different from a direction in which the tip of the first key moves as a result of mounting the first connection portion to the mounting portion.

[0009] The locking mechanism may have a second key having a longitudinal direction in the first direction and aligned with the first key in the second direction, and the first connection portion may further include a second key position correction portion provided for the second key, and a direction in which the second key position correction portion is pressed by the mounting portion may be different from a direction in which the tip of the second key moves by mounting the first connection portion to the mounting portion.

[0010] The mounting portion may have a higher rigidity than the connecting portion.

[0011] The mounting portion may be integrally formed with the frame or integrally formed with another member provided between the frame and the first connection portion, and the first connection portion may be attached to the mounting portion in a state in which bending stress is generated.

[0012] The lock may further include a third key and a fourth key having a length in the first direction and aligned in the second direction, and a second connection portion that connects the third key and the fourth key on the rotation fulcrum side of the third key and the fourth key and fixes them to the frame, wherein the first connection portion is arranged above the second connection portion, the mounting portion is provided on an upper portion of the second connection portion, and the first connection portion is attached to the mounting portion in a state in which bending stress is generated.

[0013] The bending stress may be generated by the first connection portion applying a force to the attachment portion in at least one of the first direction and the second direction.

[0014] The first connection portion may have a convex portion and the mounting portion may have a concave portion, or the first connection portion may have a concave portion and the mounting portion may have a convex portion, and the first connection portion may be attached to the mounting portion by fitting the convex portion and the concave portion together.

[0015] A keyboard device according to one embodiment of the present invention has a first key and a second key having a length in a first direction and aligned in a second direction intersecting the first direction, a mounting portion fixed to a frame and having a step in a third direction perpendicular to the first direction and the second direction, and a first connection portion attached to the mounting portion and contacting the step from a direction on a plane including the first direction and the second direction, and connecting the first key and the second key on the pivot side of the first key and the second key and fixing them to the frame, wherein the longitudinal direction of the first key is non-parallel to the longitudinal direction of the second key when the first connection portion is removed from the mounting portion.

[0016] The first connection portion includes a first key position correction portion provided for the first key and a second key position correction portion provided for the second key, and a direction in which the tip of the first key changes relative to the tip of the second key between a state in which the first connection portion is removed from the mounting portion and a state in which the first connection portion is attached to the mounting portion may be different from a direction in which the first key position correction portion changes relative to the second key position correction portion.

[0017] The mounting portion may have a higher rigidity than the first connection portion.

[0018] The mounting portion may be integrally formed with the frame or integrally formed with another member provided between the frame and the first connection portion, and when the first connection portion is detached from the mounting portion, the shape of the first connection portion on the plane may be different from the shape of the mounting portion on the plane.

[0019] The lock may further include a third key and a fourth key having a longitudinal direction in the first direction and aligned in the second direction, and a second connection portion that connects the third key and the fourth key on the rotation fulcrum side of the third key and the fourth key and fixes them to the frame, wherein the first connection portion is disposed above the second connection portion and the mounting portion is provided on an upper portion of the second connection portion, and when the first connection portion is removed from the mounting portion, the shape of the first connection portion on the plane may be different from the shape of the mounting portion on the plane.

[0020] The first connection portion may have a convex portion and the mounting portion may have a concave portion, or the first connection portion may have a concave portion and the mounting portion may have a convex portion, and the first connection portion may be attached to the mounting portion by fitting the convex portion and the concave portion together so that they contact at least one of the first direction and the second direction. Effect of the Invention

[0021] According to the present invention, a keyboard device can be provided which reduces the impact on the aesthetic appearance of the musical instrument even if the keys are deformed from their designed shape due to manufacturing errors. [Brief description of the drawings]

[0022] [Figure 1] 1 is a diagram showing a configuration of a keyboard device according to an embodiment of the present invention; [Diagram 2] 1 is a block diagram showing a configuration of a sound source device according to an embodiment of the present invention; [Diagram 3] FIG. 2 is an explanatory diagram showing the internal configuration of a housing according to an embodiment of the present invention as viewed from the side. [Figure 4] 1A is a bottom view of a black key in one embodiment of the present invention, and FIG. 1B is a top view of a mounting portion to which the black key is attached. [Diagram 5] 1A is a bottom view of a white key in one embodiment of the present invention, and FIG. 1B is a top view of a mounting portion for mounting a black key. [Figure 6] FIG. 2 is a view from below of a black key removed from its mounting portion in one embodiment of the present invention. [Figure 7] FIG. 2 is a view from below of a black key attached to a mounting portion in one embodiment of the present invention. [Figure 8] FIG. 2 is a view from below of a black key removed from its mounting portion in one embodiment of the present invention. [Figure 9] FIG. 2 is a view from below of a white key removed from its mounting portion in one embodiment of the present invention. [Figure 10] In one embodiment of the present invention, this is a view from below of a black key removed from a mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 11] FIG. 2 is a view from below of a black key attached to a mounting portion in one embodiment of the present invention. [Figure 12] FIG. 2 is a view from below of a white key removed from its mounting portion in one embodiment of the present invention. [Figure 13] FIG. 2 is a view from below of a white key attached to a mounting portion in one embodiment of the present invention. [Figure 14] FIG. 2 is a view from below of a black key removed from its mounting portion in one embodiment of the present invention. [Figure 15] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 16] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 17] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 18] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 19] FIG. 2 is a view from below of a black key attached to a mounting portion in one embodiment of the present invention. [Figure 20] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 21] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 22] 1 is a top view of a white key and a mounting portion for mounting the white key in one embodiment of the present invention. FIG. [Diagram 23] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. [Figure 24] FIG. 2 is a view from below of a black key attached to a mounting portion in one embodiment of the present invention. [Diagram 25] In one embodiment of the present invention, this is a view from below of a black key removed from its mounting part, and a view from above of the mounting part to which the black key is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] A keyboard device according to an embodiment of the present invention will be described in detail below with reference to the drawings. The following embodiment is an example of the embodiment of the present invention, and the present invention is not limited to these embodiments. In the drawings referred to in this embodiment, the same parts or parts having similar functions are given the same or similar symbols (symbols with A, B, etc. added after the numbers), and repeated explanations of them may be omitted. The dimensional ratios of the drawings (ratios between each component, ratios of length, width, height, etc.) may differ from the actual ratios for convenience of explanation, and some components may be omitted from the drawings. In the following explanation, the expressions "upper", "upper", "upper end", "lower", "lower" and "lower end" may be used based on the up-down direction in each drawing, but these up-down directions merely describe the relative directional relationship, and the up-down direction may be reversed.

[0024] First Embodiment [Keyboard device configuration] 1 is a diagram showing the configuration of a keyboard device in the first embodiment. The keyboard device 1 is an electronic keyboard instrument, such as an electronic piano, that produces sounds in response to key depressions by a user (performer). The keyboard device 1 may be a keyboard-type controller that outputs control data (e.g., MIDI) for controlling an external sound source device in response to key depressions. In this case, the keyboard device 1 does not need to have a sound source device.

[0025] The keyboard device 1 includes a keyboard assembly 10. The keyboard assembly 10 includes white keys 100w and black keys 100b. When there is no need to distinguish between the white keys 100w and the black keys 100b, they are simply referred to as keys 100. A plurality of white keys 100w and black keys 100b are arranged side by side. The number of keys 100 is N, which is 88 in this example. The direction in which these keys 100 are arranged is referred to as the scale direction. In the following description, a configuration with a "w" after a symbol (number) means that it is a configuration corresponding to a white key. A configuration with a "b" after a symbol (number) means that it is a configuration corresponding to a black key.

[0026] A part of the keyboard assembly 10 is present inside the housing 90. When the keyboard device 1 is viewed from above, the part of the keyboard assembly 10 that is covered by the housing 90 is referred to as the non-exterior section NV, and the part that is exposed from the housing 90 and visible to the user is referred to as the exterior section PV. In other words, the exterior section PV is a part of the key 100, and indicates the area where the user can perform musical operations. Hereinafter, the part of the key 100 that is exposed by the exterior section PV may be referred to as the key main body.

[0027] A sound source device 70 and a speaker 80 are arranged inside the housing 90. The sound source device 70 generates a sound waveform signal when the key 100 is pressed. The speaker 80 outputs the sound waveform signal generated by the sound source device 70 to an external space. The keyboard device 1 may also include a slider for controlling the volume, a switch for switching the tone, a display for displaying various information, and the like.

[0028] In the description in this specification, directions such as up, down, left, right, front and back refer to directions when the player sees the keyboard device 1 when playing. For example, it can be expressed that the non-exterior part NV is located on the rear side of the exterior part PV. In some cases, directions are indicated based on the key 100, such as the front end side (front side of the key) and the rear end side (rear side of the key). In this case, the front end side of the key refers to the front side of the key 100 as seen by the player. The rear end side of the key refers to the rear side of the key 100 as seen by the player. According to this definition, it can be expressed that the black key 100b is the part from the front end to the rear end of the key body of the black key 100b that protrudes upward more than the white key 100w.

[0029] 2 is a block diagram showing the configuration of a sound source device in the first embodiment. The sound source device 70 includes a signal conversion section 710, a sound source section 730, and an output section 750. A sensor 300 is provided corresponding to each key 100, detects the operation of the key, and outputs a signal according to the detected content. In this example, the sensor 300 outputs a signal according to three levels of key depression amount. The key depression speed can be detected according to the interval of this signal.

[0030] The signal conversion unit 710 acquires output signals from the sensors 300 (sensors 300-1, 300-2, ..., 300-88 corresponding to the 88 keys 100), and generates and outputs operation signals corresponding to the operation state of each key 100. In this example, the operation signals are MIDI format signals. In response to a key press operation, the signal conversion unit 710 outputs a note-on. At this time, a key number indicating which of the 88 keys 100 has been operated and a velocity corresponding to the key pressing speed are output in association with the note-on. Meanwhile, in response to a key release operation, the signal conversion unit 710 outputs a key number and a note-off in association with each other. A signal corresponding to another operation such as a pedal may be input to the signal conversion unit 710 and reflected in the operation signal.

[0031] The sound source unit 730 generates a sound waveform signal based on the operation signal output from the signal conversion unit 710. The output unit 750 outputs the sound waveform signal generated by the sound source unit 730. This sound waveform signal is output to, for example, the speaker 80 or a sound waveform signal output terminal.

[0032] [Keyboard assembly configuration] Fig. 3 is an explanatory diagram of the internal configuration of the housing in the first embodiment when viewed from the side. As shown in Fig. 3, a keyboard assembly 10 and a speaker 80 are arranged inside the housing 90. The speaker 80 is arranged at the rear side of the keyboard assembly 10. The speaker 80 is arranged so as to output sounds corresponding to key depressions toward the upper and lower sides of the housing 90. Sounds output downward travel from the lower surface side of the housing 90 to the outside. On the other hand, sounds output upward travel from inside the housing 90 through the internal space of the keyboard assembly 10 and travel to the outside through gaps between adjacent keys 100 in the exterior part PV or gaps between the keys 100 and the housing 90.

[0033] The configuration of the keyboard assembly 10 will be described with reference to FIG. 3. In addition to the above-mentioned key 100 and sensor 300, the keyboard assembly 10 includes a hammer assembly 200, a frame 500, a connection portion 800, and an attachment portion 900. Most of the components of the keyboard assembly 10 are made of resin and manufactured by injection molding or the like. The frame 500 is fixed to the housing 90. The attachment portion 900 is fixed to the frame 500. The connection portion 800 is attached to the attachment portion 900 and connects the key 100 to the frame 500 so that the key 100 can rotate relative to the frame 500. The detailed configurations of the connection portion 800 and the attachment portion 900 will be described later. The key 100 includes a key body 110 and a key support portion 120. The key body 110 is connected to the connection portion 800 via the key support portion 120. The key support portion 120 is a plate-shaped member. A portion of the key support portion 120 is relatively thin in the plate thickness direction and has flexibility. This flexibility causes the key support 120 to bend, thereby allowing the key 100 to rotate relative to the frame 500.

[0034] The white key 100w is equipped with a front-end key guide 150w. The front-end key guide 150w is in slidable contact with the front-end frame guide 510 of the frame 500 while covering it. The front-end key guide 150w is in contact with the front-end frame guide 510 on both its upper and lower sides in the scale direction. On the other hand, the black key 100b is not provided with a member equivalent to the front-end key guide 150w.

[0035] The hammer assembly 200 is rotatably attached to the frame 500. A front end 210 of the hammer assembly 200 makes contact with the hammer support part 130 in an internal space of the hammer support part 130 of the key 100 so as to be slidable generally in the front-rear direction. This sliding portion, i.e., the portion where the front end part 210 and the hammer support part 130 make contact, is located below the key 100 in the exterior part PV (forward of the rear end of the key body part 110).

[0036] The hammer assembly 200 is provided with a metal weight portion 230 located behind the pivot shaft of the hammer assembly 200. Normally (when the key is not pressed), the weight portion 230 is placed on the lower stopper 410, and the front end portion 210 of the hammer assembly 200 pushes the key 100 upward. When the key is pressed, the weight portion 230 moves upward and hits the upper stopper 430. The weight portion 230 causes the hammer assembly 200 to apply weight in response to the key being pressed. The lower stopper 410 and the upper stopper 430 are formed of a cushioning material or the like (nonwoven fabric, elastic body, etc.).

[0037] A sensor 300 is attached to a frame 500 below the key body 110. When the sensor 300 is pressed against the underside of the key body 110 by pressing a key, the sensor 300 outputs a detection signal. As described above, the sensor 300 is provided corresponding to each key 100.

[0038] [Configuration of the key 100 and the mounting part 900] The basic configuration of the key 100, the connection part 800, and the mounting part 900 will be described using Figures 4 and 5, and one embodiment of the present invention will be described from Figure 6 onwards. In other words, the configuration according to the present invention is not reflected in the example of Figures 4 and 5. The key 100, the connection part 800, and the mounting part 900 are all made of resin.

[0039] FIG. 4 shows a bottom view of a black key 100b in one embodiment of the present invention, and a top view of a mounting part 900b to which the black key is attached. FIG. 4 shows a state in which the black key 100b has been removed from the mounting part 900b. The black keys 100b have their longitudinal sides in the D1 direction, and are arranged in the D2 direction. The D2 direction can be said to be a direction intersecting the rotation plane of the black key 100b. The black key 100b has a key body 110b and a key support 120b. The black key 100b is connected to a connection part 800b. Specifically, the key body 110b is connected to the connection part 800b via the key support 120b. The key body 110b, the key support 120b, and the connection part 800b are integrally formed. The key body 110b extends in the D1 direction, and includes a main part of the black key 100b that is visible to the player. A gap 121b is provided inside the key support 120b. In other words, the key support 120b connects the key body 110b to the connection part 800b at multiple points in the D2 direction. In the example of Fig. 4, the key support 120b is connected to the connection part 800b on the outside of the key body 110b in the D2 direction.

[0040] The key body 110b, the key support 120b, and the connecting portion 800b do not have to be integrally formed. For example, the key support 120b and the connecting portion 800b may be formed separately and connected by a connecting member or the like. The key body 110b, the key support 120b, and the connecting portion 800b do not have to be made of resin. For example, at least a part of these may be made of wood, metal, or ceramics.

[0041] A plurality of black keys 100b are connected to the connection portion 800b. In the example of FIG. 4, five black keys 100b (100b-1 to 100b-5) in one octave are connected to the connection portion 800. In other words, the connection portion 800b connects the plurality of black keys 100b and fixes them to the frame 500. A recess 810b is provided on the lower surface of the connection portion 800b. In other words, the connection portion 800b has a step in the D3 direction perpendicular to the D1 direction and the D2 direction. The recess 810b extends in the D2 direction.

[0042] The mounting portion 900b is fixed to the frame 500. A protrusion 910b is provided on the upper surface of the mounting portion 900b. That is, the mounting portion 900b has a step in the D3 direction. The protrusion 910b extends in the D2 direction.

[0043] The mounting portion 900b may be a part of the frame 500, or may be another member attached to the frame 500. The mounting portion 900b may be formed integrally with the frame 500, or may be formed integrally with another member (for example, the connection portion 800w of the white key 100w described later) provided between the frame 500 and the connection portion 800b. As will be described in detail later, the mounting portion 900b may be provided on the upper surface side of the connection portion 800w of the white key 100w that is attached to a rail provided on the frame 500.

[0044] The connection part 800b is attached to the attachment part 900b by fitting (fitting) the recess 810b of the connection part 800b and the protrusion 910b of the attachment part 900b in a state where the recess 810b and the protrusion 910b of the attachment part 900b face each other. In other words, the connection part 800b is attached to the attachment part 900b by contacting the step in the D3 direction of the connection part 800b with the step in the D3 direction of the attachment part 900b from a direction on a plane including the D1 direction and the D2 direction. The attachment part 900b is fixed to the frame 500 and faces upward. Therefore, the connection part 800b is attached to the attachment part 900b from above the attachment part 900b. The connection part 800b fixes the black key 100b to the frame 500 on the side of the rotation fulcrum of the black key 100b.

[0045] FIG. 5 shows a bottom view of a white key 100w in one embodiment of the present invention, and a top view of a mounting part 900w to which the white key is attached. FIG. 5 shows the state in which the white key 100w is removed from the mounting part 900w. The configuration of the white key 100w is similar to that of the black key 100b, but differs from the black key 100b in the following points. A convex part 820w is provided on the upper part of the connection part 800w of the white key 100w. The shape of the key body part 110w of the white key 100w is different from that of the key body part 110b of the black key 100b. Of the seven white keys 100w in one octave, only the odd-numbered four white keys 100w (100w-1, 100w-3, 100w-5, 100w-7) are connected to the connection part 800w. In other respects, the white key 100w has the same configuration as the black key 100b.

[0046] Although detailed explanation is omitted, the three even-numbered white keys 100w (100w-2, 100w-4, 100w-6) among the seven white keys 100w in one octave are prepared separately from the white keys 100w shown in FIG. 5, and fit into recesses 810w or protrusions 820w provided on the connection portion 800w of the white keys 100w shown in FIG. 5.

[0047] In Fig. 4, the black key 100b is attached to the attachment part 900b, but the present invention is not limited to this configuration. For example, the black key 100b may be attached to the white key 100w by fitting the recess 810b of the connection part 800b of the black key 100b shown in Fig. 4 from above the protrusion 820w of the connection part 800w of the white key 100w shown in Fig. 5. In this case, the connection part 800w including the protrusion 820w of the white key 100w functions as the attachment part 900b.

[0048] Fig. 6 is a view of the black key removed from the mounting part from below in one embodiment of the present invention. Fig. 6 shows a partially enlarged view of the connection part 800b. As shown in Fig. 6, at the end in the D2 direction, the recess 810b of the connection part 800b is divided into a first fitting area 811b, a second fitting area 813b, a first recessed area 815b, and a second recessed area 817b.

[0049] The first fitting region 811b and the second fitting region 813b are provided at different positions in the D1 direction. Specifically, in the D1 direction, the position of the center (center line 814b) of the second fitting region 813b is closer to the key body 110b (opposite side in the D1 direction) than the position of the center (center line 812b) of the first fitting region 811b. In other words, the distance in the D1 direction between the lower side wall (opposite side in the D1 direction) of the first fitting region 811b and the upper side wall (D1 direction side) of the second fitting region 813b is smaller than the width in the D1 direction of the protrusion 910b. The recesses 810b of the first fitting region 811b and the second fitting region 813b are both fitted into the protrusion 910b of the attachment portion 900b (see FIG. 4).

[0050] The first recessed area 815b and the second recessed area 817b are provided between the first fitting area 811b and the second fitting area 813b. The recesses 810b of the first recessed area 815b and the second recessed area 817b have shapes recessed in opposite directions in a plan view. The width W2 of the recesses 810b in the first recessed area 815b and the second recessed area 817b in the D1 direction is larger than the width W1 of the recesses 810b in the first fitting area 811b in the D1 direction and the width W3 of the recesses 810b in the second fitting area 813b in the D1 direction. The length L2 of the recesses 810b in the first recessed area 815b and the second recessed area 817b in the D2 direction is larger than the length L1 of the gap 121b-1 provided inside the key support part 120b-1 in the D2 direction.

[0051] As shown in FIG. 6, when the connection part 800b is detached from the attachment part 900b, the key body 110b-1 is distorted (inclined) so as to approach the key body 110b-2. Similarly, the key body 110b-5 is distorted (inclined) so as to approach the key body 110b-4. The distance in the D2 direction between the tip of the key body 110b-1 and the tip of the key body 110b-2 is h1. The distance in the D2 direction between the tip of the key body 110b-4 and the tip of the key body 110b-5 is h2. Meanwhile, the key bodies 110b-2 to 110b-4 are substantially parallel to each other. As described above, even if the key bodies 110b-1 to 110b-5 are parallel in design as shown in FIG. 4, some of them may be distorted (inclined) as shown in FIG. 6 due to problems in the manufacture of the resin. Such distortion appears with good reproducibility. Therefore, keys of the same shape tend to have the same distortions.

[0052] FIG. 7 is a view of a black key attached to a mounting part from below in an embodiment of the present invention. For convenience of explanation, the mounting part 900b is omitted in FIG. 7. In FIG. 7, the protruding part 910b of the mounting part 900b to which the connecting part 800b is attached is shown by a dotted line. In this embodiment, the rigidity of the mounting part 900b in the D1 direction is sufficiently higher than the rigidity of the connecting part 800b. Therefore, when the connecting part 800b is attached to the mounting part 900b, the mounting part 900b does not deform, but the connecting part 800b deforms. As a result, as shown in FIG. 7, the connecting part 800b is curved in the D1 direction in the first recessed area 815b and the second recessed area 817b, and the position of the second fitting area 813b moves in the D1 direction. In the D1 direction, the center position of the second fitting area 813b coincides with the center position of the first fitting area 811b, so that the connecting part 800b fits into the mounting part 900b.

[0053] The connection part 800b is curved so that the second fitting region 813b moves in the D1 direction, and the key body 110b moves in the D2 direction. The movement of the key body 110b in the D2 direction changes the distance in the D2 direction between the tip of the key body 110b-1 and the tip of the key body 110b-2 from h1 to h3. As a result, the key body 110b-1 and the key body 110b-2 become approximately parallel. Similarly to the above, the distance in the D2 direction between the tip of the key body 110b-4 and the tip of the key body 110b-5 changes from h2 to h4. As a result, the key body 110b-4 and the key body 110b-5 become approximately parallel. In the connection part 800b in the region corresponding to the black keys 100b-2 to 100b-4, the linear first fitting region 811b is continuous. Therefore, the position of the tip of each of the key bodies 110b-2 to 110b-4 does not change before and after the connection part 800b is attached to the attachment part 900b.

[0054] In other words, the connection part 800b is attached to the attachment part 900b in a state where the connection part 800b is pressed by the attachment part 900b from a direction on a plane including the D1 direction and the D2 direction. The connection part 800b is bent by being pressed by the attachment part 900b. As a result, the position of the tip of the black key 100b in the D2 direction is determined. In this embodiment, the connection part 800b is pressed by the attachment part 900b as described above, so that the distortion of the black key 100b is corrected, and as a result, the distance between the tip of the black key 100b (100b-1) where the distortion has occurred and the tip of another black key 100b (100b-2) adjacent to the black key 100b changes. In the state of FIG. 7, the connection part 800b is attached to the attachment part 900b in a state where a bending stress is generated. The bending stress is generated when the connection part 800b receives a force in the D1 direction from the attachment part 900b, as shown in FIG. 7.

[0055] As described above, the first fitting region 811b and the second fitting region 813b are provided, and the position of the black key 100b is corrected when the connection portion 800b is attached to the attachment portion 900b. Therefore, the first fitting region 811b and the second fitting region 813b are sometimes referred to as "position correction portions." The direction in which the position correction portion is pressed by the attachment portion 900b is the D1 direction. On the other hand, the direction in which the tip of the black key 100b moves when the connection portion 800b is attached to the attachment portion 900b is the D2 direction. In other words, the direction in which the position correction portion is pressed by the attachment portion 900b is different from the direction in which the tip of the black key 100b moves. The position correction portion is provided corresponding to the key in which distortion occurs. In other words, the position correction portion may be multiple as shown in FIG. 6, or may be one.

[0056] In other words, the distance between the tip of the black key 100b-1 and the tip of the black key 100b-2 when the connection part 800b is removed from the attachment part 900b (as shown in FIG. 6) is different from the distance between the tip of the black key 100b-1 and the tip of the black key 100b-2 when the connection part 800b is attached to the attachment part 900b (as shown in FIG. 7). In other words, the shape of the connection part 800b in plan view in the state shown in FIG. 6 is different from the shape of the connection part 800b in plan view in the state shown in FIG. 7.

[0057] Providing the first recessed area 815b and the second recessed area 817b in the recessed area 810b makes it possible to prevent interference between the inner wall of the recessed area 810b and the protruding portion 910b when the connecting portion 800b is curved in these areas. Furthermore, providing the first recessed area 815b and the second recessed area 817b makes it easier for the connecting portion 800b to bend in these areas, making it easier to correct the position of the key body 110b in the D2 direction and improving the workability when attaching the connecting portion 800b to the attachment portion 900b.

[0058] In the present embodiment, the rigidity of the mounting portion 900b in the D1 direction is higher than that of the connecting portion 800b, but the present invention is not limited to this configuration. The rigidity of the mounting portion 900b may be the same as or lower than that of the connecting portion 800b. However, the mounting portion 900b has a rigidity such that the shape of the connecting portion 800b changes when the connecting portion 800b is attached to the mounting portion 900b.

[0059] As described above, according to the keyboard device of this embodiment, even if the key is deformed from the designed shape due to manufacturing errors, the position correction unit is provided in consideration of the tendency of deformation, and the key can be simply attached to the frame to correct the position of the key tip in the scale direction to the correct position. As a result, the aesthetic appearance of the instrument can be maintained without the need for adjustments after the key is attached to the frame. Furthermore, since the connection part 800b is attached to the attachment part 900b in a state in which bending stress is generated, there is no gap between the connection part 800b and the attachment part 900b, and the key tip can be attached in a stable state. In this embodiment, when the components other than the connection part 800b (the key body part 110b and the key support part 120b) are deformed from the designed shape due to manufacturing errors, for example, when the direction in which the key body part 110b extends from the key support part 120b is deformed from the designed shape, the deviation of the key tip from the normal position in the scale direction due to the change can be corrected.

[0060] <Second embodiment> 8 is a view of a black key removed from an attachment part in one embodiment of the present invention, viewed from below. In a connection part 800bA of the second embodiment, the shape of a recess 810bA in a plan view is different from the shape of the recess 810b of the first embodiment. In the following explanation, the same features as those of the connection part 800b of FIG. 6 will be omitted, and the differences from the recess 810b will be mainly explained.

[0061] As shown in FIG. 8, the key bodies 110bA (110bA-1 to 110bA-5) of the black keys 100bA (100bA-1 to 100bA-5) are all non-parallel. The key body 110bA-2 is inclined in the R1 direction relative to the key body 110bA-3. The key body 110bA-1 is inclined in the R1 direction more than the key body 110bA-2 is inclined in the R1 direction relative to the key body 110bA-3. The key body 110bA-4 is inclined in the R2 direction relative to the key body 110bA-3. The key body 110bA-5 is inclined in the R2 direction more than the key body 110bA-4 is inclined in the R2 direction relative to the key body 110bA-3. A recess 810bA provided in the connection portion 800bA is curved in the D1 direction from a first end 801bA to a second end 802bA of the connection portion 800bA in the D2 direction.

[0062] When the connection part 800bA shown in Fig. 8 is attached to the attachment part 900b (referred to as the attachment part 900bA in this embodiment) shown in Fig. 4, the connection part 800bA provided at the position corresponding to the black keys 100bA-1, 100bA-2, 100bA-4, and 100bA-5 is pressed in the direction D1 by the attachment part 900bA, so that the black keys 100bA move in the direction D2 or in the direction opposite to the direction D2 as shown by the arrows in the figure. As a result, the distortion of the black key 100bA shown in Fig. 8 is corrected, and each of the key bodies 110bA-1 to 110bA-5 becomes approximately parallel.

[0063] The shape of the recess 810bA can be appropriately corrected according to the distortion of each black key 100bA. For example, if the key bodies 110bA-2 to 110bA-4 are substantially parallel, the recess 810bA in the area corresponding to these keys may be substantially linear in the D2 direction in a plan view.

[0064] As described above, the keyboard device according to this embodiment can provide the same effects as the first embodiment.

[0065] <Third embodiment> Fig. 9 is a view of the white key removed from the mounting part in one embodiment of the present invention, as viewed from below. As shown in Fig. 9, the key bodies 110wB of the white keys 100wB (100wB-1, 100wB-3, 100wB-5, 100wB-7) are all non-parallel. The key body 110wB-1 is inclined in the R1 direction relative to the key body 110wB-3. The key body 110wB-5 is inclined in the R2 direction relative to the key body 110wB-3. The key body 110wB-7 is inclined in the R2 direction more than the key body 110wB-5 relative to the key body 110wB-3. A recess 810wB and a protrusion 820wB provided on the connection portion 800wB are curved in the D1 direction from a first end 801wB to a second end 802wB of the connection portion 800wB in the D2 direction in a plan view.

[0066] When the connection part 800wB shown in Fig. 9 is attached to the attachment part 900w (referred to as attachment part 900wB in this embodiment) shown in Fig. 5, the connection parts 800wB provided at positions corresponding to the white keys 100wB-1, 100wB-5, and 100wB-7 are pressed in the D1 direction by the attachment part 900wB, so that the white keys 100wB move in the D2 direction or in the opposite direction to the D2 direction as shown by the arrows in the figure. As a result, the distortion of the white keys 100wB as shown in Fig. 9 is corrected, and the key bodies 110wB-1, 110wB-3, 110wB-5, and 110wB-7 become approximately parallel.

[0067] In plan view, the convex portion 820wB has the same shape as the concave portion 810wB, so by attaching the connection portion 800wB to the attachment portion 900wB, the concave portion 810wB and the convex portion 820wB become linear. In this way, the connection portion 800bA of the black key 100bA shown in FIG. 8 can be attached to the convex portion 820wB that has become linear by attaching the connection portion 800wB to the attachment portion 900wB. In this case, the convex portion 820wB functions as a substitute for the attachment portion 900bA. In other words, the connection portion 800bA is disposed above the connection portion 800wB, the convex portion 820wB that functions as a substitute for the attachment portion 900bA is provided on the upper portion of the connection portion 800wB, and the connection portion 800bA is attached to the convex portion 820wB in a state in which bending stress is generated. In a state in which the connection portion 800bA is detached from the convex portion 820wB, the shape of the connection portion 800bA (curved) on a plane including the D1 and D2 directions differs from the shape of the convex portion 820wB (straight) on the same plane.

[0068] As described above, the keyboard device according to this embodiment can achieve the same effect as the first embodiment for the white keys. In the case of white keys, there are cases where a guide is attached to the front end of the key, but even in such cases, the key orientation can be properly corrected at the center of the key's rotation, so that the frictional force when the guide slides against the front end of the key can be reduced. As a result, the key can be operated smoothly.

[0069] <Fourth embodiment> FIG. 10 is a view from below of a black key removed from a mounting part in one embodiment of the present invention, and a view from above of the mounting part to which the black key is attached. FIG. 11 is a view from below of a black key attached to a mounting part in one embodiment of the present invention. For convenience of explanation, the mounting part 900bC is omitted in FIG. 11. The connection part 800bC and the mounting part 900bC shown in FIG. 10 and FIG. 11 are similar to the connection part 800bA shown in FIG. 8 and the mounting part 900b shown in FIG. 4. In the following explanation, the explanation of the same features as the connection part 800bA and the mounting part 900bA will be omitted, and the differences from these will be mainly explained.

[0070] 10, the shape of the recess 810bC of the connection portion 800bC in a plan view is linear. On the other hand, the shape of the protrusion 910bC of the attachment portion 900bC in a plan view is curved in the D1 direction from the first end 901bC to the second end 902bC of the attachment portion 900bC in the D2 direction.

[0071] As shown in Fig. 11, when the connection part 800bC is attached to the attachment part 900bC, the connection parts 800bC provided at positions corresponding to the black keys 100bC-1, 100bC-2, 100bC-4, and 100bC-5 are pressed in the D1 direction by the attachment part 900bC, so that the black keys 100bC move in the D2 direction or in the direction opposite to the D2 direction, as shown by the arrows in Fig. 11. As a result, the distortion of the black key 100bC as shown in Fig. 11 is corrected, and each of the key bodies 110bC-1 to 110bC-5 becomes approximately parallel.

[0072] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0073] <Fifth embodiment> Fig. 12 is a bottom view of the white key removed from the mounting part in one embodiment of the present invention. Fig. 13 is a bottom view of the white key attached to the mounting part in one embodiment of the present invention. For convenience of explanation, the mounting part 900bD is omitted in Fig. 12 and Fig. 13.

[0074] As shown in Fig. 12, a recess 810wD provided in the connection portion 800wD is curved in the D1 direction from a first end 801wD to a second end 802wD of the connection portion 800wD in the D2 direction in a plan view, similar to the recess 810wB shown in Fig. 9. On the other hand, a protrusion 820wD provided in the connection portion 800wD is linear in a plan view, unlike the recess 810wD.

[0075] As shown in FIG. 13, when the connection part 800wD is attached to the attachment part 900w shown in FIG. 5 (referred to as the attachment part 900wD in this embodiment), the connection part 800wD provided at the position corresponding to the white keys 100wD-1, 100wD-5, and 100wD-7 is pressed in the D1 direction by the attachment part 900wD. As a result, the concave part 810wD, which was curved (FIG. 12), changes to a straight line (FIG. 13), and the convex part 820wD, which was straight (FIG. 12), changes to a curved line (FIG. 13). Then, the white keys 100wD move in the D2 direction or in the opposite direction to the D2 direction, as shown by the arrows in the figure. As a result, the distortion of the white key 100wB as shown in FIG. 12 is corrected, and the key main body parts 110wD-1, 110wD-3, 110wD-5, and 110wD-7 become approximately parallel as shown in FIG. 13.

[0076] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0077] Sixth Embodiment Fig. 14 is a view from below of a black key removed from its attachment part in one embodiment of the present invention. The connection part 800bE shown in Fig. 14 is similar to the connection part 800bA shown in Fig. 8. In the following explanation, the explanation of the same features as the connection part 800bA in Fig. 8 will be omitted, and the differences from the connection part 800bA will be mainly explained.

[0078] As shown in FIG. 14, a recess 810bE provided in a connection part 800bE is provided with a first protrusion 830bE and a second protrusion 840bE that protrude inward from a side wall of the recess 810bE in the D1 direction or in the opposite direction to the D1 direction in a plan view. The first protrusion 830bE and the second protrusion 840bE are provided in opposing positions, that is, in the same position in the D2 direction. The first protrusion 830bE and the second protrusion 840bE are provided between adjacent black keys 100bE. Specifically, the first protrusion 830bE and the second protrusion 840bE are provided between adjacent key supports 120bE. The tip of the first protrusion 830bE and the tip of the second protrusion 840bE are located in positions that follow the shape (curved shape) of the recess 810bA shown in FIG. 8 in a plan view. 8. Therefore, when the connection portion 800bE is attached to the attachment portion 900b shown in FIG. 4 (referred to as attachment portion 900bE in this embodiment), the connection portion 800bE undergoes the same change as the connection portion 800bA shown in FIG.

[0079] In the D2 direction, the orientation of the black key 100bE-1 is controlled by the first protrusion 830bE (830bE-1, 830bE-2) and the second protrusion 840E (840bE-1, 840bE-2) adjacent to each other sandwiching the black key 100bE-1. In other words, the orientation of the black key 100bE can be corrected by the protrusion amount of the first protrusion 830bE and the second protrusion 840bE adjacent to each other sandwiching the black key 100bE.

[0080] The first protrusion 830bE and the second protrusion 840bE do not necessarily have to exist as a pair, and if one of the protrusions is sufficiently long, the other protrusion may not exist. The first protrusion 830bE and the second protrusion 840bE do not have to be provided in positions facing each other. In other words, the first protrusion 830bE and the second protrusion 840bE may be provided in different positions in the D2 direction.

[0081] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0082] Seventh embodiment Fig. 15 shows a bottom view of the black key removed from the mounting part and a top view of the mounting part to which the black key is attached in one embodiment of the present invention. The connection part 800bF shown in Fig. 15 is similar to the connection part 800bE shown in Fig. 14. In the following explanation, the explanation of the same features as the connection part 800bE in Fig. 14 will be omitted, and the explanation will be mainly focused on the differences from the connection part 800bE.

[0083] As shown in FIG. 15, the connection portion 800bF is provided with a recess 810bF so as to leave the fitting portion 850bF. In other words, the fitting portion 850bF is a convex portion when the recess 810bF around the fitting portion 850bF is used as a reference. The attachment portion 900bF is provided with a recess 920bF for fitting the fitting portion 850bF. The recess 920bF is linear. The fitting portion 850bF has a pillar portion 851bF, a first protrusion 853bF, and a second protrusion 855bF. The first protrusion 853bF and the second protrusion 855bF protrude in opposite directions from the pillar portion 851bF at the same position in the D2 direction. The first protrusion 853bF and the second protrusion 855bF are provided between the black keys 100bF. Specifically, the first protrusion 853bF and the second protrusion 855bF are provided between adjacent key supports 120bF. The tip of the first protrusion 853bF and the tip of the second protrusion 855bF are located at positions along the shape (curved shape) of the recess 810bA shown in Fig. 8 in a plan view. Therefore, when the connection part 800bF is attached to the attachment part 900bF, the connection part 800bF changes in the same manner as the connection part 800bA shown in Fig. 8 and the connection part 800bE shown in Fig. 14.

[0084] 14, the orientation of the black key 100bF-1 is controlled by the first protrusion 853bF and the second protrusion 855bF adjacent to each other sandwiching the black key 100bF-1 in the D2 direction. In other words, the orientation of the black key 100bF can be corrected by the protrusion amount of the first protrusion 853bF and the second protrusion 855bF adjacent to each other sandwiching the black key 100bF.

[0085] It is not necessary that both the first protrusion 853bF and the second protrusion 855bF are provided. For example, when the sum of the width of the column portion 851bF in the D1 direction and the length of the first protrusion 853bF reaches the width of the recess 920bF in the D1 direction, the second protrusion 855bF may not be provided. Also, the recess 810bF may not be provided, and the fitting portion 850bF may protrude downward from the lower surface of the connection portion 800bF. The first protrusion 853bF and the second protrusion 855bF may protrude from the column portion 851bF at different positions in the D2 direction.

[0086] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0087] Eighth embodiment Fig. 16 shows a bottom view of the black key removed from the mounting part and a top view of the mounting part to which the black key is attached in one embodiment of the present invention. The connection part 800bG shown in Fig. 16 is similar to the connection part 800bF shown in Fig. 15. In the following explanation, the explanation of the same features as the connection part 800bF of Fig. 15 will be omitted, and the explanation will be mainly focused on the differences from the connection part 800bF.

[0088] As in FIG. 15, the connecting portion 800bG shown in FIG. 16 is provided with a recess 810bG so as to leave a plurality of fitting portions 850bG. However, the plurality of fitting portions 850bG are provided discretely at positions corresponding to the first protrusion 853bF and the second protrusion 855bF in FIG. 15. That is, each of the plurality of fitting portions 850bG is provided between adjacent key support portions 120bG. The plurality of fitting portions 850bG are present at positions along the shape (curved shape) of the recess 810bA shown in FIG. 8 in a plan view. Therefore, when the connecting portion 800bG is attached to the attachment portion 900bG, the connecting portion 800bG changes in the same manner as the connecting portion 800bA shown in FIG. 8 and the connecting portion 800bG shown in FIG. 15.

[0089] 15, the orientation of the black key 100bG-1 is controlled by the adjacent fitting parts 850bG that sandwich the black key 100bG-1 in the D2 direction. In other words, the orientation of the black key 100bG can be corrected by the positions of the fitting parts 850bG that are adjacent to each other so as to sandwich the black key 100bG.

[0090] In the present embodiment, the shape of the fitting portion 850bG in a plan view is circular, but the present invention is not limited to this. For example, the fitting portion 850bG may be a polygon such as a triangle or a rectangle, an ellipse, or any curved shape.

[0091] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0092] <Ninth embodiment> Fig. 17 shows a bottom view of the black key removed from the mounting portion and a top view of the mounting portion to which the black key is attached in one embodiment of the present invention. The connection portion 800bH shown in Fig. 17 is the same as the connection portion 800bG shown in Fig. 16. The mounting portion 900bH shown in Fig. 17 is similar to the mounting portion 900bG shown in Fig. 16. In the following explanation, the same features as the mounting portion 900bG in Fig. 16 will be omitted, and the differences from the mounting portion 900bG will be mainly explained.

[0093] Similar to FIG. 16, the mounting portion 900bH shown in FIG. 17 is provided with a plurality of recesses 920bH. In plan view, the shape of the recesses 920bH corresponds to the shape of the fitting portion 850bH. That is, the shape of the recesses 920bH is such that the fitting portion 850bH can be fitted into the recesses 920bH. The plurality of recesses 920bH are provided discretely and are aligned linearly in the D2 direction. Although the shape of the plurality of recesses 920bh is different from the shape of the recesses 920bG in FIG. 16, both have the same function.

[0094] In the present embodiment, a configuration in which the shape of the recess 920bH is the same as the shape of the fitting portion 850bH in a plan view is exemplified, but is not limited to this configuration. In a plan view, the shape of the recess 920bH may be different from the shape of the fitting portion 850bH, as long as it includes the shape of the fitting portion 850bH.

[0095] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0096] Tenth embodiment FIG. 18 is a bottom view of a black key removed from a mounting portion in one embodiment of the present invention, and a top view of the mounting portion to which the black key is attached. FIG. 19 is a bottom view of a black key attached to a mounting portion in one embodiment of the present invention. For convenience of explanation, the mounting portion 900bJ is omitted in FIG. 19. The mounting portion 900bJ shown in FIG. 18 is the same as the mounting portion 900bH shown in FIG. 17. The connection portion 800bJ shown in FIG. 18 is similar to the connection portion 800bH shown in FIG. 17. In the following explanation, the explanation of the same features as the connection portion 800bH in FIG. 17 will be omitted, and the differences from the connection portion 800bH will be mainly explained.

[0097] As shown in Fig. 18, the multiple key bodies 110bJ are inclined in different directions at random. In the example of Fig. 18, with the key body 110bJ-3 as a reference, the key body 110bJ-1 is inclined in the R2 direction, the key body 110bJ-2 is inclined in the R1 direction, the key body 110bJ-4 is inclined in the R2 direction, and the key body 110bJ-5 is inclined in the R1 direction. The multiple fitting portions 850bJ are provided according to the inclinations of the multiple key bodies 110bJ.

[0098] Specifically, in the case of a key body 110bJ-1 inclined in the R2 direction with respect to the reference, a fitting part 850bJ-1 provided on the D2 side of the key body 110bJ-1 is provided further in the D1 direction (rearward) than a fitting part 850bJ-2 provided on the opposite side of the D2 direction of the key body 110bJ-1. On the other hand, in the case of a key body 110bJ-5 inclined in the R1 direction with respect to the reference, a fitting part 850bJ-6 provided on the opposite side of the D2 direction of the key body 110bJ-5 is provided on the D1 direction (rearward) than a fitting part 850bJ-5 provided on the D2 side of the key body 110bJ-5.

[0099] As shown in Fig. 19, when the connection portion 800bJ is attached to the attachment portion 900bJ, each fitting portion 850bJ moves in the direction of the arrow in Fig. 19. Specifically, the fitting portions 850bJ-1 and 850bJ-6 move in the opposite direction to the D1 direction, and the fitting portions 850bJ-2 and 850bJ-5 move in the D1 direction. As a result, the key main bodies 110bJ-1 and 110bJ-4 move in the opposite direction to the D2 direction, and the key main bodies 110bJ-2 and 110bJ-5 move in the D2 direction. As a result, the key main bodies 110bJ-1 to 110bJ-5 become approximately parallel to each other.

[0100] As described above, the keyboard device according to this embodiment can provide the same effects as the above-described embodiment. As described above, the key body 110bJ can be individually corrected depending on the positions of the multiple fitting portions 850bJ.

[0101] <Eleventh embodiment> Figure 20 shows a bottom view of the black key removed from the mounting portion and a top view of the mounting portion to which the black key is attached in one embodiment of the present invention. The connection portion 800bK and the mounting portion 900bK shown in Figure 20 are similar to the connection portion 800bH and the mounting portion 900bH shown in Figure 17. In the following explanation, the same features as the connection portion 800bH and the mounting portion 900bH in Figure 17 will be omitted, and the differences from the connection portion 800bH will be mainly explained.

[0102] As in Fig. 17, a connection portion 800bK shown in Fig. 20 is provided with recesses 810bK so as to leave a plurality of fitting portions 850bK. Similarly, a mounting portion 900bK is provided with a plurality of recesses 920bK.

[0103] In a plan view, the shape of the recess 920bK corresponds to the shape of the fitting portion 850bK. That is, the shape of the recess 920bK is such that the fitting portion 850bK can be fitted into the recess 920bK. The recesses 920bK are arranged side by side in the D2 direction, and each of the recesses 920bK has a longitudinal direction in the D1 direction. The recesses 920bK are parallel to each other.

[0104] In a plan view, the fitting portion 850bK has a longitudinal direction similar to that of the recess 920bK. However, when the connection portion 800bK is removed from the attachment portion 900bK, the longitudinal directions of the multiple fitting portions 850bK are different from each other. Specifically, with the fitting portion 850bK-3 as a reference, the fitting portions 850bK-1 and 850bK-2 are inclined in the R1' direction, and the fitting portions 850bK-4 and 850bK-5 are inclined in the R2' direction. The R1' direction is the same rotation direction as the R1 direction. The R2' direction is the same rotation direction as the R2 direction.

[0105] When the connection part 800bK is attached to the attachment part 900bK, the fitting parts 850bK-1 and 850bK-2 are each subjected to a force in the opposite direction to the D2 direction and become parallel to the fitting part 850bK-3. As a result, the tips of the key main bodies 110bK-1 and 110bK-2 move in the D2 direction and become parallel to the key main body 110bK-3. Similarly to the above, the fitting parts 850bK-4 and 850bK-5 are each subjected to a force in the D2 direction and become parallel to the fitting part 850bK-3. As a result, the tips of the key main bodies 110bK-4 and 110bK-5 move in the opposite direction to the D2 direction and become parallel to the key main body 110bK-3.

[0106] In the first to tenth embodiments (embodiments prior to this embodiment), the connection part 800b receives a force in the D1 direction from the attachment part 900b, thereby correcting the position of the key body part 110b in the D2 direction. In this embodiment, the connection part 800bK receives a force in the D2 direction from the attachment part 900bK, thereby correcting the position of the tip of the key body part 110bK in the D2 direction. However, in this embodiment, the direction in which the connection part 800bK receives the force from the attachment part 900bK is different from the direction in which the tip of the key body part 110bK moves. In other words, the connection part 800bK is attached to the attachment part 900bK in a state in which bending stress is generated, and the bending stress is generated by receiving a force in the D2 direction as shown in FIG.

[0107] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0108] <Twelfth embodiment> Figure 21 shows a bottom view of a black key removed from an attachment section, and a top view of the attachment section to which the black key is attached, in one embodiment of the present invention. The attachment section 900bL shown in Figure 21 is the same as the attachment section 900bK shown in Figure 20. The connection section 800bL shown in Figure 21 is similar to the connection section 800bK shown in Figure 20. In the following explanation, the same features as the connection section 800bK in Figure 20 will be omitted, and differences from the connection section 800bK will be mainly explained.

[0109] Similar to Fig. 20, the connecting portion 800bL shown in Fig. 21 is provided with a plurality of fitting portions 850bL. As shown in Fig. 21, a plurality of fitting portions 850bL are provided for one recess 920bL. The plurality of fitting portions 850bL are aligned in the same direction as the inclination of the fitting portion 850bK in Fig. 20. Although the shape of the plurality of fitting portions 850bL is different from the shape of the fitting portion 850bK in Fig. 20, both have the same function.

[0110] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0111] <Thirteenth embodiment> Fig. 22 is a top view of a white key and a mounting portion for mounting the white key in one embodiment of the present invention. As shown in Fig. 22, the white keys 100wM are connected by a connecting portion 140wM. The connecting portion 140wM extends linearly in the D2 direction. The key bodies 110wM are non-parallel to each other. Specifically, the key bodies 110wM-1 and 110wM-3 are inclined in the R1 direction, and the key bodies 110wM-5 and 110wM-7 are inclined in the R2 direction.

[0112] The mounting portion 900wM is provided with a recess 930wM. The recess 930wM is provided with a first protrusion 940wM and a second protrusion 950wM that protrude inward from the side wall of the recess 930wM in the D1 direction or the opposite direction to the D1 direction in a plan view. The first protrusion 940wM and the second protrusion 950wM are provided at positions facing each other, that is, at the same position in the D2 direction. The first protrusion 940wM and the second protrusion 950wM are provided between adjacent white keys 100wM. The tip of the first protrusion 940wM and the tip of the second protrusion 950wM are located at positions that follow the shape of the convex portion 910bC shown in FIG. 10 in a plan view. Therefore, when the connection portion 140wM is attached to the mounting portion 900wM, the connection portion 140wM changes in the same way as the connection portion 800bC shown in FIG. 10. As a result, the key bodies 110bM-1 to 110bM-4 become approximately parallel to each other.

[0113] As described above, the keyboard device according to this embodiment can provide the same effects as those of the above-described embodiment.

[0114] <Fourteenth embodiment> FIG. 23 is a bottom view of a black key removed from a mounting portion in one embodiment of the present invention, and a top view of the mounting portion to which the black key is attached. As shown in FIG. 23, a connection portion 800bN-1 is provided on the black key 100bN-1, and a connection portion 800bN-2 is provided on the black key 100bN-2. FIG. 24 is a bottom view of a black key attached to a mounting portion in one embodiment of the present invention. For convenience of explanation, the mounting portion 900bN is omitted in FIG. 24, and only the protrusion 910bN is shown by a dotted line. The configuration of the connection portion 800bN-1 shown in FIG. 23 and FIG. 24 is the same shape as the configuration of the portion of the connection portion 800b in the region corresponding to the black key 100b-1 in the connection portion 800b shown in FIG. 6 and FIG. 7. The configuration of the connection part 800bN-2 shown in Figures 23 and 24 has the same shape as the configuration of the part of the connection part 800b in the region corresponding to the black key 100b-2, for example, of the connection part 800b shown in Figures 6 and 7. In the configurations of Figures 23 and 24, the description of the same parts as those in Figures 6 and 7 may be omitted.

[0115] As shown in FIG. 23, the longitudinal direction of the key body 110bN-2 of the black key 100bN-2 is perpendicular to the longitudinal direction of the recess 810bN-2. On the other hand, the longitudinal direction of the key body 110bN-1 of the black key 100bN-1 is inclined in the R1 direction with respect to the direction perpendicular to the longitudinal direction of the recess 810bN-1. The key body 110bN-2 is connected to the approximate center of the key support 120bN-2 in the D2 direction. On the other hand, the key body 110bN-1 is connected to the left side (opposite side of the D2 direction) of the key support 120bN-1 in the D2 direction. The connection part 800bN-2 connected to the black key 100bN-2 is provided with a recess 810bN-2. The connection part 800bN-1 connected to the black key 100bN-1 is provided with a recess 810bN-1. In plan view, the shape of the recess 810bN-2 is substantially the same as the shape of the protrusion 910bN provided on the attachment portion 900bN. On the other hand, in plan view, the shape of the recess 810bN-1 is different from the shape of the protrusion 910bN.

[0116] 23, in the D2 direction, the recess 810bN-1 of the connection portion 800bN-1 is divided into a first fitting region 811bN, a second fitting region 813bN, a first recessed region 815bN, and a second recessed region 817bN. In the D2 direction, the length of the first fitting region 811bN is greater than the length of the second fitting region 813bN. However, in the D2 direction, the length of the second fitting region 813bN may be greater than the length of the first fitting region 811bN.

[0117] The first fitting region 811bN and the second fitting region 813bN are provided at different positions in the D1 direction. Specifically, in the D1 direction, the position of the center (center line 814bN) of the second fitting region 813bN is closer to the key body 110bN-1 than the position of the center (center line 812bN) of the first fitting region 811bN. In other words, the center line 812bN of the first fitting region 811bN provided on the side to which the key body 110bN-1 is inclined is farther from the key body 110bN-1 than the center line 814bN of the second fitting region 813bN provided on the opposite side.

[0118] As shown in Fig. 24, the recesses 810bN-1 and 810bN-2 and the protrusion 910bN are fitted together, whereby the black keys 100bN-1 and 100bN-2 are fitted to the fitting portion 900bN. Since the shape of the recess 810bN-2 is substantially the same as that of the protrusion 910bN, the longitudinal direction of the key body 110bN-2 is perpendicular to the longitudinal direction of the protrusion 910bN. On the other hand, in the recess 810bN-1, the position of the center line 814bN of the second fitting region 813bN is closer to the key body 110bN-1 than the position of the center line 812bN of the first fitting region 811bN, so that the black key 100bN-1 is fitted to the fitting portion 900bN in a state inclined in the R2 direction. As a result, the inclination of the key body 110bN-1 is corrected, and the longitudinal direction of the key body 110bN-1 approaches a direction perpendicular to the longitudinal direction of the convex portion 910bN, as shown in Fig. 24. In other words, the protrusion 860bN has a function of correcting the position of the tip of the key body 110bN in the D2 direction.

[0119] <Fifteenth embodiment> Fig. 25 shows a bottom view of a black key removed from a mounting part and a top view of the mounting part to which the black key is attached in one embodiment of the present invention. As shown in Fig. 25, the shape of the connection part 800bP-1 provided on the black key 100bP-1 is the same as the shape of the connection part 800bP-2 provided on the black key 100bP-2. On the other hand, as in Fig. 23, the longitudinal direction of the key body 110bP-1 of the black key 100bP-1 is inclined in the R1 direction with respect to the direction perpendicular to the longitudinal direction of the recess 810bP-1.

[0120] The convex portion 910bP provided on the mounting portion 900bP is not linear like the convex portion 910bN in Fig. 23, but in the correction area 911bP where the black key 100bP-1 is mounted, the convex portion 910bP is inclined in the R2' direction with respect to the D2 direction, and extends in the D2 direction outside the correction area 911bP. By mounting the black key 100bP-1 in this correction area 911bP, the inclination of the key body 110bP-1 is corrected, and the longitudinal direction of the key body 110bP-1 approaches a direction perpendicular to the longitudinal direction of the convex portion 910bP. In other words, the convex portion 910bP of the correction area 911bP has the function of correcting the position of the tip of the key body 110bP in the D2 direction.

[0121] As described above, as shown in these embodiments, an embodiment of the present invention can also be applied to a single key.

[0122] In the above-described embodiment, an electronic piano is shown as an example of a keyboard device to which a hammer assembly is applied. Meanwhile, the hammer assembly of the above-described embodiment can also be applied to a rotation mechanism of an acoustic piano (such as a grand piano or an upright piano). For example, in an upright piano, the opening mechanism of the above-described embodiment can be applied to a rotation mechanism having a rotating part and a support part that rotatably supports the rotating part. In this case, the sound generating mechanism corresponds to the hammer and the strings. The rotation mechanism of the above-described embodiment can also be applied to a rotating part other than that of a piano.

[0123] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0124] 1: keyboard device, 10: keyboard assembly, 70: sound source device, 80: speaker, 90: housing, 100: key, 100b: black key, 100w: white key, 110: key body, 120: key support, 121b: gap, 130: hammer support, 140wM: connection, 150w: front end key guide, 200: hammer assembly, 210: front end, 230: weight, 300: sensor, 410: lower stopper, 430: upper stopper, 500: frame, 510: front end frame guide, 710: signal conversion section, 730: sound source section, 750: output section, 800: connection, 801bA: first end, 802bA: second end, 810b: recess, 811b: first mating region, 813b: second mating region, 815b: first recessed region, 817b: recessed region, 820w: protruding portion, 830bE: first protruding portion, 840bE: second protruding portion, 850bF: mating portion, 851bF: pillar portion, 853bF: first protruding portion, 855bF: second protruding portion, 860bN: protruding portion, 900: mounting portion, 901bC: first end, 902bC: second end, 910b: protruding portion, 911bN: correction region, 920bF: recess, 930wM: recess, 940wM: first protruding portion, 950wM: second protruding portion

Claims

1. A first key having a length in a first direction; A mounting portion fixed to the frame; a first connection portion that fixes the first key to the frame on a side of a pivot point of the first key and has a longitudinal direction in a second direction perpendicular to a rotation plane of the first key; having one of the attachment portion and the first connection portion includes a first convex portion and a second convex portion protruding in a third direction perpendicular to the first direction and the second direction, The first convex portion and the second convex portion are provided at different positions in the second direction, the other of the mounting portion and the first connection portion includes a first wall portion that sandwiches the first convex portion and a second wall portion that sandwiches the second convex portion in a plane including the first direction and the second direction, A keyboard device in which the first connection portion is attached to the mounting portion with the side surfaces of the first convex portion and the second convex portion pressed against the first wall portion and the second wall portion so that the first connection portion is bent in a direction different from the second direction within the plane.

2. a second key having a longitudinal direction in the first direction and aligned with the first key in the second direction; The first connection portion connects the first key and the second key to the frame, and fixes the first key and the second key to the frame.

2. The keyboard device according to claim 1, wherein a distance between a tip of the first key and a tip of the second key is different between a state in which the first connection portion is attached to the attachment portion and a state in which the first connection portion is detached from the attachment portion.

3. The first connection portion includes a first key position correction portion provided for the first key, 3. The keyboard device according to claim 1, wherein a direction in which the first key position correction portion is pressed by the mounting portion is different from a direction in which the tip of the first key moves as a result of mounting the first connection portion to the mounting portion.

4. a second key having a longitudinal direction in the first direction and aligned with the first key in the second direction; The first connection portion further includes a second key position correction portion provided for the second key, The keyboard device according to claim 3 , wherein a direction in which the second key position correction portion is pressed by the mounting portion is different from a direction in which the tip of the second key moves as a result of mounting the first connection portion to the mounting portion.

5. The keyboard device according to claim 1 , wherein the mounting portion has a rigidity higher than a rigidity of the first connection portion.

6. the attachment portion is integrally formed with the frame or is integrally formed with another member provided between the frame and the first connection portion, 6. The keyboard device according to claim 1, wherein the first connection portion is attached to the attachment portion in a state in which a bending stress is generated in the first connection portion.

7. a third key and a fourth key each having a longitudinal direction in the first direction and aligned in the second direction; a second connection portion that connects the third key and the fourth key to a pivot point side of the third key and the fourth key and fixes the third key and the fourth key to the frame; and the first connection portion is disposed above the second connection portion, The attachment portion is provided on an upper portion of the second connection portion, 6. The keyboard device according to claim 1, wherein the first connection portion is attached to the attachment portion in a state in which a bending stress is generated in the first connection portion.

8. 8. The keyboard device according to claim 6, wherein the bending stress is generated by the first connection portion applying a force to the attachment portion in at least one of the first direction and the second direction.

9. The other of the mounting portion and the first connection portion has a first recess and a second recess, 9. The keyboard device according to claim 1, wherein the first connection portion is attached to the mounting portion by fitting the first convex portion into the first concave portion and fitting the second convex portion into the second concave portion.

10. A keyboard device as described in any one of claims 1 to 9, wherein the first convex portion and the second convex portion are continuous.

11. A keyboard device as described in any one of claims 1 to 9, wherein the first convex portion and the second convex portion are spaced apart.

Images