WO2018169080A1

WO2018169080A1 - Keyboard device

Info

Publication number: WO2018169080A1
Application number: PCT/JP2018/010609
Authority: WO
Inventors: 俊介市来
Original assignee: ヤマハ株式会社
Priority date: 2017-03-16
Filing date: 2018-03-16
Publication date: 2018-09-20
Also published as: JP2020095062A

Abstract

This keyboard device comprises: a frame; keys that each rotate about a key fulcrum with respect to the frame; a first guide that includes a first frame guide connected to the frame and includes a first key guide connected to the keys so as to grip the first frame guide; and a second guide that includes a second key guide connected to the keys and includes a second frame guide connected to the frame so as to grip the second key guide and that is provided below the first guide; and a third guide that regulates, at a position behind the first and second guides, movement of the keys in the scale direction, wherein the three positions of the key fulcrum, the first guide, and the second guide, or the three positions of the first, second, and third guides are provided so as not to be aligned in a straight line when viewed from a first direction in which the keys are adjacent to each other.

Description

Keyboard device

The present invention relates to a keyboard device.

The keyboard device has a plurality of keys arranged side by side. The accuracy of the arrangement of multiple keys has a large effect on the aesthetics of the instrument. For this reason, if the key shape is deformed due to a manufacturing error, the aesthetics of the musical instrument is reduced as it is. Therefore, even when a manufacturing error occurs, a technique related to a key guide connected to a frame for adjusting the key position has been developed (for example, Patent Document 1). Among the key guides, the key guide arranged at a position close to the performer side not only arranges the arrangement of a plurality of keys, but also affects the feeling that the performer receives from the finger during performance (hereinafter referred to as touch feeling). .

Japanese Patent No. 3846426

In an electronic keyboard instrument such as an electronic piano, generally, a key is rotatably supported by a frame on the rear end side (back side as viewed from the performer) of the key. The amount that can be pressed on the front end side of the key is designed in accordance with the acoustic piano. On the other hand, the position where the key is supported by the frame, that is, the rotation center of the key is closer to the performer than the rotation center of the key in the acoustic piano.

According to this configuration, the length of the key can be shortened, and the size of the electronic keyboard instrument in the depth direction can be reduced. In this case, since the position of the center of rotation of the key of the electronic keyboard instrument and the key of the acoustic piano are different, the feeling at the time of key pressing changes. On the other hand, when the key of the electronic keyboard instrument is lengthened and the rotation center of the key is moved to the back side, the size of the electronic keyboard instrument in the depth direction increases. In addition, the longer the key, the greater the influence of deformation due to manufacturing errors and changes over time. For example, when the key is bent in the scale direction, the influence of deformation on the scale direction is greater for a longer key than for a shorter key.

One of the objects of the present invention is to reduce the influence of deformation even if the key is deformed.

A keyboard device according to an embodiment of the present invention includes a frame, a key that rotates with respect to the frame around a key fulcrum, a first frame guide connected to the frame, and the key connected to the key. A first guide including a first key guide sandwiching the first frame guide; a second key guide connected to the key; and a second frame guide connected to the frame to sandwich the second key guide; A second guide provided below the first guide, and a third guide for restricting movement of the key in the scale direction behind the first and second guides, The three points of the key fulcrum, the first guide, and the second guide, or the three points of the first, second, and third guides are straight when viewed from the first direction in which the key is adjacent. Provided not to line up It is.

The first frame guide may slide on the surface of the first key guide, and the second frame guide may slide on the surface of the second key guide.

The second key guide may be integral with the key, and the second frame guide may be integral with the frame.

The second frame guide may protrude from the frame in a direction in which the key extends.

A reinforcing member that suppresses deformation of the second frame guide in the first direction may be further provided between the second frame guide and the frame.

The second frame guide may have a protrusion that protrudes toward the second key guide and slides with the second key guide.

The area in which the first frame guide and the first key guide slide when viewed from the first direction is such that the first frame guide and the first key guide are viewed from the first direction. It may be smaller than the overlapping area.

The first frame guide may include at least one protrusion that protrudes toward the first key guide and slides with the first key guide.

The first frame guide may have a pair of protrusions protruding in opposite directions toward the first key guide.

The first frame guide may protrude upward from the frame.

The protrusion may be provided on an upper end of the first frame guide.

The first key guide may have a pair of opposing inner wall surfaces, and the first frame guide may be configured to slide on the pair of inner wall surfaces of the first key guide.

The second frame guide may have a pair of opposed inner wall surfaces, and the second key guide may be configured to slide on the pair of inner wall surfaces of the second frame guide.

The three points of the key fulcrum, the first guide, and the second guide can be provided so that they are not aligned on the same straight line when viewed from the adjacent direction. The three portions of the second and third guides can be provided so that they are not aligned on the same straight line when viewed from the adjacent direction of the keys.

According to the present invention, even if the key is deformed, the influence of the deformation can be reduced.

It is a figure which shows the structure of the keyboard apparatus in one Embodiment of this invention. It is a block diagram which shows the structure of the sound source device in one Embodiment of this invention. It is explanatory drawing at the time of seeing the structure inside the housing | casing in one Embodiment of this invention from the side surface. It is explanatory drawing at the time of seeing the keyboard assembly in one Embodiment of this invention from the upper surface. It is the side view and perspective view explaining the detailed structure of the key in one Embodiment of this invention. It is a perspective view explaining the detailed structure of the flame | frame in one Embodiment of this invention. It is a perspective view explaining the detailed structure of the 1st frame guide and 2nd frame guide in one Embodiment of this invention. It is an enlarged side view of the 1st guide and 2nd guide in one Embodiment of this invention. It is AA 'sectional drawing of the 1st guide in one Embodiment of this invention. It is BB 'sectional drawing of the 2nd guide in one Embodiment of this invention. It is sectional drawing explaining operation | movement of a key and a guide in the keyboard assembly in one Embodiment of this invention. It is a perspective view explaining the detailed structure of the 1st frame guide and 2nd frame guide in one Embodiment of this invention. It is a perspective view explaining the detailed structure of the sliding member in one Embodiment of this invention. It is a perspective view explaining the state where the sliding member was attached to the 1st frame guide in one Embodiment of this invention. It is sectional drawing of the 1st guide in one Embodiment of this invention.

Hereinafter, a keyboard device 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]
FIG. 1 is a diagram showing a configuration of a keyboard device according to an embodiment of the present invention. In this example, the keyboard device 1 is an electronic keyboard instrument that emits sound in response to a user (player) key depression such as an electronic piano. Note that the keyboard device 1 may be a keyboard-type controller that outputs control data (for example, MIDI) for controlling an external sound source device in response to a key depression. In this case, the keyboard device 1 may not have a sound source device.

The keyboard device 1 includes a keyboard assembly 10. The keyboard assembly 10 includes a white key 100w and a black key 100b. 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. A direction in which a plurality of white keys 100w and black keys 100b are arranged is referred to as a scale direction. When the white key 100w and the black key 100b can be described without particular distinction, the key 100 may be referred to. Also in the following description, when “w” is added to the end of the reference sign, it means that the configuration corresponds to the white key. Further, when “b” is added at the end of the code, it means that the configuration corresponds to the black key.

A part of the keyboard assembly 10 exists inside the housing 90. In other words, the housing 90 covers a part of the white key 100w and the black key 100b. When the keyboard device 1 is viewed from above, a portion of the keyboard assembly 10 covered by the casing 90 is referred to as a non-appearance portion NV, and a portion exposed from the casing 90 and visible to the user is referred to as an appearance portion PV. . That is, the appearance part PV is a part of the key 100 and indicates an area where the user can perform a performance operation. Hereinafter, a portion of the key 100 that is exposed by the appearance portion PV may be referred to as a key body portion.

Inside the housing 90, a sound source device 70 and a speaker 80 are arranged. The tone generator 70 generates a sound waveform signal when the key 100 is pressed. The speaker 80 outputs the sound waveform signal generated in the sound source device 70 to an external space. The keyboard device 1 may be provided with a slider for controlling the volume, a switch for switching timbres, a display for displaying various information, and the like.

In the description of the present specification, directions such as up, down, left, right, front, and back indicate directions when the keyboard device 1 is viewed from the performer when performing. Therefore, for example, the non-appearance part NV can be expressed as being located on the back side with respect to the appearance part PV. Further, the direction may be indicated with the key 100 as a reference, such as the front end side (key front side) and the rear end side (key rear side). In this case, the key front end side indicates the front side as viewed from the performer with respect to the key 100. The rear end side of the key indicates the back side viewed from the performer with respect to the key 100. According to this definition, the black key 100b can be expressed as a portion protruding upward from the white key 100w from the front end to the rear end of the key body of the black key 100b.

FIG. 2 is a block diagram showing a configuration of a sound source device according to an embodiment of the present invention. The sound source device 70 includes a signal conversion unit 710, a sound source unit 730, and an output unit 750. The sensor 300 is provided corresponding to each key 100, detects a key operation, and outputs a signal corresponding to the detected content. In this example, the sensor 300 outputs a signal according to the key depression amount in three stages. The key pressing speed can be detected according to the interval of this signal.

The signal conversion unit 710 acquires the output signal of the sensor 300 (sensors 300-1, 300-2,..., 300-88 corresponding to the 88 key 100), and operates according to the operation state of each key 100. Generate and output a signal. In this example, the operation signal is a MIDI signal. Therefore, the signal conversion unit 710 outputs note-on according to the key pressing operation. At this time, the key number indicating which of the 88 keys 100 has been operated and the velocity corresponding to the key pressing speed are also output in association with the note-on. On the other hand, in response to the key release operation, the signal conversion unit 710 outputs the key number and 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.

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 the sound waveform signal output terminal.

[Configuration of keyboard assembly]
FIG. 3 is an explanatory diagram when the internal structure of the housing according to the embodiment of the present invention is viewed from the side. In the following description, the black key 100b will be described. However, for convenience of description, it is simply referred to as the key 100. As shown in FIG. 3, the keyboard assembly 10 and the speaker 80 are disposed inside the housing 90. The speaker 80 is disposed on the back side of the keyboard assembly 10. The speaker 80 is arranged so as to output a sound corresponding to the key depression toward the upper side and the lower side of the housing 90. The sound output downward advances from the lower surface side of the housing 90 to the outside. On the other hand, the sound output upward passes through the space inside the keyboard assembly 10 from the inside of the housing 90, and is externally transmitted from the gap between the adjacent keys 100 in the exterior portion PV or the gap between the key 100 and the housing 90. Proceed to

The configuration of the keyboard assembly 10 will be described with reference to FIG. The keyboard assembly 10 includes a connection portion 180, a hammer assembly 200, and a frame 500 in addition to the key 100 described above. The frame 500 is fixed to the housing 90. The connection unit 180 connects the key 100 so as to be rotatable with respect to the frame 500. The connecting portion 180 includes a plate-like flexible member 181, a key-side support portion 183, and a rod-like flexible member 185. The plate-like flexible member 181 extends from the rear end of the key 100 toward the key rear end side. The key side support portion 183 extends rearward from the rear end of the plate-like flexible member 181. The rod-like flexible member 185 is supported by the key side support portion 183 and the frame side support portion 585 of the frame 500. That is, a rod-shaped flexible member 185 is disposed between the key 100 and the frame 500. The key 100 can be rotated with respect to the frame 500 by bending the rod-shaped flexible member 185. The rod-shaped flexible member 185 is configured to be attachable to and detachable from the key side support portion 183 and the frame side support portion 585. The keyboard assembly 10 is a resin-made structure whose most configuration is manufactured by injection molding or the like. The rod-like flexible member 185 may be configured so as not to be attached or detached integrally with the key side support portion 183 and the frame side support portion 585, or by bonding or the like.

As shown in FIG. 5, the key 100 includes a first key guide 151, a second key guide 153, and a side key guide 155. In other words, the first key guide 151, the second key guide 153, and the side key guide 155 are connected to the key 100. As shown in FIG. 6, the frame 500 includes a first frame guide 511, a second frame guide 513, and a side frame guide 515. In other words, the first frame guide 511, the second frame guide 513, and the side frame guide 515 are connected to the frame 500. The first key guide 151 slides with the first frame guide 511. The second key guide 153 slides with the second frame guide 513. The side key guide 155 slides with the side frame guide 515. The first guide 51 is a concept including a first key guide 151 and a first frame guide 511. The second guide 53 is a concept including a second key guide 153 and a second frame guide 513. The third guide 55 is a concept including a side key guide 155 and a side frame guide 515. The first guide 51, the second guide 53, and the third guide 55 are guides that regulate the position of the key 100 in the scale direction and the operation direction of the key 100 when the key is released. These three guides 51 to 53 are not arranged on the same straight line when the key 100 is viewed in the scale direction. More specifically, as shown in FIG. 3, there is no second guide 53 on the straight line L3 that generally connects the third guide 55 and the first guide 51, and the third guide 53 and the second guide 53 are not connected. There is no first guide 51 on a straight line L4 that substantially connects the guide 53. According to at least three guides arranged in this way, the movement of the key 100 can be restricted in the scale direction, yawing direction, and rolling direction.

The first key guide 151 is slidably in contact with the first frame guide 511 while covering the first frame guide 511. In other words, the first key guide 151 is slidably in contact with the first frame guide 511 extending upward from the frame 500 from both sides in the scale direction. In other words, the first frame guide 511 is inserted inside the first key guide 151. In other words, the first key guide 151 sandwiches the first frame guide 511.

The second key guide 153 is slidably in contact with the second frame guide 513 while being sandwiched by the second frame guide 513. In other words, the second key guide 153 is sandwiched from both sides in the scale direction by the second frame guide 513 extending from the frame 500 to the key front end side, and slidably contacts the second frame guide 513. The second guide 53 is arranged on the key front end side and below the first guide 51.

The side key guide 155 is slidably in contact with the side frame guide 515 while being sandwiched between the side frame guides 515. In other words, the side key guide 155 is slidably in contact with the side frame guide 515 extending upward from the frame 500 from both sides in the scale direction.

The first guide 51 and the second guide 53 are arranged in an area exposed from the housing 90. The third guide 55 is disposed in an area covered by the housing 90. That is, the first guide 51 and the second guide 53 are arranged at a position corresponding to the appearance part PV, and the third guide 55 is arranged in a region corresponding to the non-appearance part NV. The 3rd guide 55 exists in the key front end side rather than the connection part 180 (plate-shaped flexible member 181). However, the 3rd guide 55 may be arrange | positioned in the area | region corresponding to the external appearance part PV. Note that the third guide that restricts the movement of the key 100 in the scale direction may be provided at another position, or may be the same as a key fulcrum described later.

The hammer assembly 200 is attached to the frame 500 so as to be rotatable. At this time, the shaft support portion 220 of the hammer assembly 200 and the rotation shaft 520 of the frame 500 are slidably contacted at at least three points. The front end portion 210 of the hammer assembly 200 contacts the inner space of the hammer support portion 120 so as to be slidable in the front-rear direction. This sliding portion, that is, the portion where the front end portion 210 and the hammer support portion 120 are in contact is located below the key 100 in the appearance portion PV (the key front end side with respect to the rear end of the key body portion).

The hammer assembly 200 includes a metal weight portion 230 on the back side of the rotation shaft 520. In a normal state (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 back. When the key is depressed, the weight portion 230 moves upward and collides with the upper stopper 430. The hammer assembly 200 applies weight to the key depression by the weight portion 230. The lower stopper 410 and the upper stopper 430 are formed of a buffer material or the like (nonwoven fabric, elastic body, etc.).

The sensor 300 is attached to the frame 500 below the hammer support portion 120 and the front end portion 210. When the sensor 300 is crushed on the lower surface side of the front end portion 210 by the key depression, the sensor 300 outputs a detection signal. As described above, the sensor 300 is provided corresponding to each key 100.

FIG. 4 is an explanatory diagram when the keyboard assembly according to the embodiment of the present invention is viewed from above. As shown in FIG. 4, the key side support portion 183b of the black key 100b is disposed closer to the key rear end side than the key side support portion 183w of the white key 100w. This position is related to the positions of the rod-like flexible members 185w and 185b that are the rotation center of the key 100. By arranging in this way, the difference between the rotation center of the white key and the black key of the acoustic piano is reproduced. In this example, the plate-like flexible member 181b corresponding to the black key 100b is longer than the plate-like flexible member 181w corresponding to the white key 100w. Corresponding to such an arrangement, the frame side support portion 585b of the frame 500 is arranged closer to the key rear end side than the frame side support portion 585w. Therefore, the shape of the key rear end side (frame side support portion 585) of the frame 500 is a shape in which the frame side support portion 585b protrudes further back than the frame side support portion 585w.

In FIG. 4, the configurations of the hammer assembly 200 and the frame 500 located below the key 100 are omitted. Specifically, the configuration of the frame 500 in the vicinity of the connection portion 180 (such as the frame side support portion 585) is described, and a part of the configuration on the near side is omitted. In other descriptions, some descriptions may be omitted in the drawing.

[Key structure]
FIG. 5 is a side view and a perspective view illustrating the detailed structure of the key in one embodiment of the present invention. FIG. 5A shows the key 100 as viewed from the side. FIG. 5B is a view of the key 100 as viewed obliquely from below. Here, although the black key will be described, the structure of the black key can be applied to the white key. As shown in FIG. 5, the key 100 is connected to the frame side support portion 585 via the connection portion 180.

First, the directions (scale direction, rolling direction, yawing direction, vertical direction) used in the following description are defined. As described above, the scale direction corresponds to the direction in which the keys 100 are arranged (the left-right direction as viewed from the performer). The rolling direction corresponds to the direction of rotation about the direction in which the key 100 extends (from the front to the back as viewed from the performer). The yawing direction is a direction that bends in the left-right direction when the key 100 is viewed from above. Although the difference between the scale direction and the yawing direction is not large, the movement of the key 100 in the scale direction means the parallel movement, whereas the movement of the key 100 in the yawing direction bends (warps) in the scale direction. Equivalent to. The vertical direction corresponds to the direction in which the rod-shaped flexible member 185 extends (the vertical direction as viewed from the performer) and can be said to be the direction that becomes the axis of bending in the yawing direction.

The key 100 includes a first key guide 151, a second key guide 153, and a side key guide 155. In FIG. 5, the first key guide 151, the second key guide 153, and the side key guide 155 are integrally formed. However, the first key guide 151, the second key guide 153, and the side key guide 155 may be formed as separate members and bonded or fixed to the key 100.

The first key guide 151 is provided on the front side of the key 100 on the inner side of the recess 150 where the lower side of the key 100 is opened. A stepped portion 157 is provided in the recessed portion 150 of the key 100. The width in the scale direction of the recess 150 on the key front end side with respect to the stepped portion 157 is narrower than the width in the scale direction of the recess 150 on the key rear end side with respect to the stepped portion 157. The first key guide 151 is closer to the key front end (player side) than the stepped portion 157. In a state where the first frame guide 511 is inserted into the recess 150 of the key 100, the first key guide 151 and the first frame guide 511 slide. That is, the first key guide 151 is a part of the inner wall of the recess 150.

The second key guide 153 extends below the key 100 at the front end of the key 100. The second key guide 153 has a plate-like portion. The upper end of the second key guide 153 enters the recess 150 and is connected to both side walls of the recess 150 in the scale direction. With this structure, the mechanical strength of the second key guide 153 with respect to the scale direction is improved. With the second key guide 153 sandwiched between the second frame guides 513, the second key guide 153 and the second frame guide 513 slide. A hammer support 120 is connected below the second key guide 153.

The side key guide 155 is provided at a position corresponding to the non-appearance part NV of the key 100. The shape of the side key guide 155 is a plate shape in which a part of the side surface of the key 100 in the longitudinal direction of the key is recessed in the scale direction. With the side key guide 155 sandwiched between the side frame guides 515, the side key guide 155 and the side frame guide 515 slide.

The plate-like flexible member 181 is a plate-like member having flexibility in the yawing direction. The plate-like flexible member 181 is arranged so that the normal direction of the plate surface is directed to the scale direction. Thus, the plate-like flexible member 181 can be deformed in the rolling direction and the yawing direction by bending or twisting. That is, the plate-like flexible member 181 has a degree of freedom in the rolling direction and yawing direction of the key 100 due to its flexibility. By combining deformation in the yawing direction, it can be said that the plate-like flexible member 181 also has a degree of freedom in the scale direction. On the other hand, the plate-like flexible member 181 hardly deforms in the vertical direction. Note that the normal direction of the plate-like flexible member 181 does not have to be completely coincident with the scale direction, as long as it has a component in the scale direction. When the normal direction of the plate-like flexible member 181 does not coincide with the scale direction, the angle formed by the normal direction and the scale direction is preferably as small as possible.

The rod-like flexible member 185 is a rod-like member having flexibility. The rod-like flexible member 185 includes the rotation center (key fulcrum) of the key 100 when the key is depressed. The rod-shaped flexible member 185 can be deformed in the rolling direction and the yawing direction by bending or twisting. That is, the bar-shaped flexible member 185 has a degree of freedom in the rolling direction and yawing direction of the key 100 due to its flexibility. By combining the deformation in the rolling direction, it can be said that the rod-shaped flexible member 185 also has a degree of freedom in the scale direction. On the other hand, the bar-shaped flexible member 185 hardly deforms in the vertical direction. Note that the rod-shaped flexible member 185 can be twisted more than the plate-shaped flexible member 181 because of its shape characteristics.

The cross-sectional shape of the rod-like flexible member 185 (the cross-section perpendicular to the longitudinal direction of the rod-like shape) is a shape surrounded by a combination of a curve and a straight line, and in this example is a semicircular shape. In the semicircular shape, the straight line portion is the back side and the curved portion is the near side, but may be in the opposite direction. In addition, the cross-sectional shape of the rod-shaped flexible member 185 may be a shape surrounded only by a curve (for example, a circular shape) or a shape surrounded only by a straight line (for example, a rectangular shape). That is, the rod-shaped flexible member 185 can be bent and deformed in directions other than the longitudinal direction (vertical direction) of the rod-shaped flexible member 185 (two directions among three directions defining three dimensions), and The cross-sectional shape may be any shape as long as twisting deformation about the longitudinal direction is possible. The rod-like flexible member 185 may have a thickness that changes along the longitudinal direction, such as a cone shape.

In the above configuration, the key fulcrum (rod-like flexible member 185), the first guide 51, and the second guide 53 are keyed at three places that are not aligned on a straight line when the key 100 is viewed in the scale direction. 100 movements are restricted. That is, since the first guide 51 is disposed above the second guide 53, the key fulcrum, the first guide 51, and the second guide 53 are the same when viewed from the scale direction. It is not on a straight line. More specifically, as shown in FIG. 3, there is no second guide 53 on a straight line L1 that generally connects the key fulcrum and the first guide 51, and the key fulcrum and the second guide 53 are approximately There is no first guide 51 on the connected straight line L2.

[Frame structure]
FIG. 6 is a perspective view illustrating the detailed structure of the frame in one embodiment of the present invention. The frame 500 includes a first frame guide 511, a second frame guide 513, a side frame guide 515, and a tip frame guide 521. The frame 500 includes a first rib 540, a first wall portion 542, a support column 544, a second rib 550, a third rib 551, a second wall portion 552, and a third wall portion 554. The plurality of first frame guides 511 and the plurality of second frame guides 513 are connected by a column 544. The first frame guide 511 protrudes upward from the support column 544. The second frame guide 513 protrudes from the column 544 to the key front end side (direction in which the key 100 extends). The first frame guide 511 and the second frame guide 513 are arranged corresponding to the black key 100b. However, the first frame guide 511 and the second frame guide 513 may be arranged corresponding to the white key 100w.

The first frame guide 511 and the second frame guide 513 are formed integrally with the column 544. However, the first frame guide 511 and the second frame guide 513 may be formed as separate members from the support 544 and may be bonded or fixed to the frame 500. The “rib” and the “wall” are both plate-like members, but the “rib” is a plate-like member extending in a direction parallel to the longitudinal direction of the key 100, and the “wall” is the key 100 It is a plate-like member extending in a direction orthogonal to the longitudinal direction.

The side frame guide 515 is disposed between the adjacent keys 100. At a position where the white key 100w and the black key 100b are adjacent (for example, between A and B), the side frame guide 515 contacts both the white key 100w and the black key 100b. At a position where the white keys 100w are adjacent to each other (for example, between B and C), the side frame guide 515 contacts only the white key 100w. Since the side surface frame guide 515 is disposed between the adjacent keys 100, even when the keys 100 move in the scale direction in the non-appearance portion NV, it is possible to suppress the adjacent keys 100 from contacting each other. .

The first rib 540 is provided between the hammer assemblies 200 arranged adjacent to each other. In other words, the hammer assembly 200 is disposed in a space partitioned by the first rib 540. The plurality of first ribs 540 are connected by the support columns 544 and the first wall portion 542. The second wall portion 552 is provided at a position facing the first wall portion 542. The second wall portion 552 is connected to the third wall portion 554. The first wall portion 542 and the second wall portion 552 are connected by the second rib 550 and the third rib 551. The second rib 550 has a larger plate-like area and higher rigidity than the third rib 551. A circuit board on which the sensor 300 is formed is disposed between the first wall portion 542 and the second wall portion 552. The distal end frame guide 521 is connected by a third wall portion 554. The distal end frame guide 521 is disposed corresponding to the white key 100w. However, the front end frame guide 521 may be arranged corresponding to the black key 100b.

[Frame guide structure]
FIG. 7 is a perspective view illustrating the detailed structure of the first frame guide and the second frame guide in one embodiment of the present invention. In the following description, the scale direction is the first direction D1, the longitudinal direction of the key 100 is the second direction D2, and the direction orthogonal to the plane including the first direction D1 and the second direction D2 is the third direction D3. The above three directions correspond to the x-axis, y-axis, and z-axis of the orthogonal coordinate system. In the xyz axis, when defining the orientation, the opposite direction of the first direction D1 is the first direction D4, the opposite direction of the second direction D2 is the second direction D5, and the opposite direction of the third direction D3 is the third direction D6. . Note that the third direction D3 can be simply referred to as upward.

As shown in FIG. 7, the first frame guide 511 protrudes from the support column 544 in the third direction D3. In other words, the first frame guide 511 protrudes in the third direction D3 with respect to the frame 500. A pair of protrusions 5110, a pair of first recesses 5111, and a second recess 5115 are provided at the tip of the first frame guide 511. The pair of protrusions 5110 are provided on both sides in the first directions D1 and D4 of the first frame guide 511, and each protrudes from the first frame guide 511 toward both sides in the first directions D1 and D4. The protrusion 5110 is provided above the first frame guide 511. In the example of FIG. 7, the protrusion 5110 is provided at the upper end of the first frame guide 511. The position of the protrusion 5110 is not limited to the position above the first frame guide 511, and can be changed as appropriate depending on the positional relationship between the first key guide 151 and the first frame guide 511 when the key is pressed and released. The pair of first recesses 5111 are provided so as to face the first direction D1 and the fourth direction D4, respectively, and curved surfaces 5113 are provided at the end portions of the both side walls. The first frame guide 511 is formed integrally with the frame 500, but each may be formed as a separate member and bonded to the frame 500.

The second frame guide 513 protrudes from the support column 544 in the second direction D2. The second frame guide 513 has a pair of protrusions 5130 protruding in the second direction D2, and a third recess 5131 is provided therebetween. Each protrusion 5130 of the second frame guide 513 is provided with a protrusion 5133 that protrudes toward the inside of the third recess 5131. A reinforcing member 5137 is provided at the bottom of the third recess 5131 to connect the protruding portions 5130 facing each other in the third recess 5131. Reinforcing members 5135 are provided on both sides of the second frame guide 513 in the first directions D1 and D4. The reinforcing member 5135 connects the support column 544 and the protrusion 5130 of the second frame guide 513. In other words, the reinforcing member 5135 is provided between the second frame guide 513 and the frame 500. The reinforcing member 5135 suppresses the deformation of the second frame guide 513 in the first direction D1. The second frame guide 513 is formed integrally with the frame 500, but each may be formed as a separate member and bonded to the frame 500.

As described above, since the reinforcing member 5137 and the reinforcing member 5135 are provided in the second frame guide 513, a change in the interval between the third recesses 5131 is suppressed. In other words, the change in the interval between the two protrusions 5133 is suppressed. Thereby, rattling of the front end of the key 100 in the first direction D1 can be suppressed. If sufficient strength of the second frame guide 513 is ensured, the reinforcing

members

5135 and 5137 may not be provided separately from the second frame guide 513. In FIG. 7, the second frame guide 513 is formed integrally with the frame 500, but each may be formed as a separate member and bonded to the frame 500.

In the present embodiment, the configuration in which the first frame guide 511 protrudes from the support column 544 in the third direction D3 and the second frame guide 513 protrudes from the support column 544 in the second direction D2 is exemplified, but the present invention is not limited to this configuration. The first frame guide 511 and the second frame guide 513 may be provided so as to satisfy the condition that the key fulcrum, the first guide 51, and the second guide 53 are not aligned on a straight line when viewed from the scale direction. . For example, the first frame guide 511 may protrude from the support column 544 in the third direction D3 (upward), and the second frame guide 513 may protrude from the support column 544 in the third direction D6 (downward). As another example, the first frame guide 511 may protrude from the column 544 in the second direction D2 (key forward), and the second frame guide 513 may protrude from the column 544 in the third direction D6 (downward). Thus, for example, both frame guides 511 and 531 may be arranged at different positions in the vertical direction.

[Attachment structure of key 100 to frame 500]
FIG. 8 is an enlarged side view of the first guide and the second guide in the embodiment of the present invention. FIG. 9 is a cross-sectional view taken along line AA ′ of the first guide according to the embodiment of the present invention. FIG. 10 is a BB ′ cross-sectional view of the second guide according to the embodiment of the present invention.

8 and 9, in the first guide 51, the first frame guide 511 is inserted inside the first key guide 151. In other words, the first key guide 151 sandwiches the first frame guide 511. As shown in FIG. 9, the pair of protrusions 5110 protrude from the first frame guide 511 toward the first key guide 151. When the key is released, the protrusion 5110 slides with the first key guide 151. As shown in FIG. 8, when the key 100 is viewed from the scale direction, the first key guide 151 and the protrusion 5110 slide compared to the area where the first key guide 151 and the first frame guide 511 overlap. The sliding area (area of the hatched portion in FIG. 8) is small. The protrusion 5110 is a continuous sliding portion, and the first key guide 151 is an intermittent sliding portion.

In the present embodiment, the configuration in which the projections 5110 are provided on the first frame guide 511 in order to reduce the sliding area between the first key guide 151 and the first frame guide 511 has been described. It is not limited. The protrusions 5110 are not provided on the first frame guide 511, and the side surface of the first frame guide 511 and the side surface of the first key guide 151 may slide. That is, when the key 100 is viewed from the scale direction, the area where the first key guide 151 and the first frame guide 511 overlap may be the sliding area of both. A buffer member may be provided between the key 100 and the frame 500 in order to reduce the collision between the key 100 and the column 544 that is a part of the frame 500 when the key is pressed. The buffer member may be provided on the lower end 102 of the key 100, may be provided on the upper surface 546 of the column 544, or may be provided on both the lower end 102 of the key 100 and the upper surface 546 of the column 544. Good.

As shown in FIGS. 8 and 10, in the second guide 53, the second key guide 153 is sandwiched by the second frame guide 513. In other words, the second key guide 153 is inserted into the third recess 5131 of the second frame guide 513. The second frame guide 513 is provided with a protrusion 5133 that protrudes toward the second key guide 153, and the protrusion 5133 slides with the second key guide 153 when the key is released. The second frame guide 513 is a continuous sliding portion, and the second key guide 153 is an intermittent sliding portion.

In the present embodiment, the configuration in which the protruding portion 5133 is provided on the second frame guide 513 in order to reduce the sliding area between the second key guide 153 and the second frame guide 513 has been described. It is not limited to. The protrusion 5133 may not be provided on the second frame guide 513, and the inner surface of the protrusion 5130 of the second frame guide 513 and the side of the second key guide 153 may slide. That is, when the key 100 is viewed from the scale direction, the area where the second key guide 153 and the second frame guide 513 overlap may be the sliding area of both.

The configuration in which the first frame guide 511 is inserted inside the first key guide 151 allows the first guide 51 on the upper side of the key 100, which is easily subjected to the force from the performer, to have high mechanical strength. Due to the configuration in which the second frame guide 513 sandwiches the second key guide 153, the second guide 53 on the front end side of the key 100 where the shift in the scale direction of the key 100 is conspicuous can have high positional accuracy.

[Keyboard assembly operation]
FIG. 11 is a cross-sectional view for explaining the operation of the key and the guide in the keyboard assembly according to the embodiment of the present invention. FIG. 11A is a diagram when the key 100 is in the rest position (a state where the key is not depressed). FIG. 11B is a diagram when the key 100 is in the end position (a state where the key is pressed to the end). When the key 100 is pressed, the rod-like flexible member 185 is bent with the center of rotation. Then, the hammer support portion 120 pushes down the front end portion 210 of the hammer assembly 200, so that the hammer assembly 200 rotates about the rotation shaft 520. Thereby, the weight part 230 collides with the upper side stopper 430, and rotation of the hammer assembly 200 stops. That is, the key 100 reaches the end position. Further, when the sensor 300 is crushed by the front end portion 210, the sensor 300 outputs detection signals at a plurality of stages according to the crushed amount (key pressing amount).

On the other hand, when the key is released, the weight portion 230 moves downward, the hammer assembly 200 rotates, and the key 100 rotates upward. When the weight 230 comes into contact with the lower stopper 410, the hammer assembly 200 stops rotating and the key 100 returns to the rest position.

As described above, according to the keyboard device 1 according to the first embodiment, the first frame guide 511 is inserted inside the first key guide 151, and the second frame guide 513 sandwiches the second key guide 153. Thus, both high mechanical strength and high positional accuracy of the key 100 with respect to the frame 500 can be achieved. Since the second key guide 153 is integral with the key 100 and the second frame guide 513 is integral with the frame 500, the mechanical strength and the positional accuracy are further improved. The positional accuracy is further improved by the second frame guide 513 projecting in the second direction D2. Since the reinforcing member 5137 and the reinforcing member 5135 are provided on the second frame guide 513, rattling of the key 100 in the first directions D1 and D4 is suppressed. As a result, a smooth sliding operation of the key 100 when the key is released is obtained. Since the second frame guide 513 includes the protruding portion 5133, the sliding area can be reduced. As a result, a smooth sliding operation of the key 100 when the key is released is obtained.

When the key 100 is viewed from the scale direction, the sliding area where the first key guide 151 and the protrusion 5110 slide is smaller than the area where the first key guide 151 and the first frame guide 511 overlap. Thus, a smooth sliding movement of the key 100 when the key is released is obtained. For example, by providing the first frame guide 511 with the protrusion 5110, the sliding area can be reduced. Since the first frame guide 511 protrudes upward, the operation of the key 100 is controlled at a position close to the player's hand. As a result, the mechanical strength against the force applied to the key 100 in the rolling direction is improved. By providing the protrusion 5110 at the upper end of the first frame guide 511, the mechanical strength against the force applied in the rolling direction is further improved.

<Second Embodiment>
In the second embodiment, a keyboard device 1A including a first guide 51A having a configuration different from that of the first guide 51 in the first embodiment will be described. In the second embodiment, a configuration in which a sliding member 600A is provided between the first frame guide 511A and the first key guide 151A will be described.

[Structure of the first frame guide]
FIG. 12 is a perspective view illustrating the detailed structure of the first frame guide and the second frame guide in one embodiment of the present invention. The first frame guide 511A shown in FIG. 12 is similar to the first frame guide 511 shown in FIG. 7, but the first frame guide 511A is different from the first frame guide 511A in that no protrusion is provided at the upper end. 511 is different.

[Structure of sliding member]
FIG. 13 is a perspective view illustrating the detailed structure of the sliding member in one embodiment of the present invention. As shown in FIG. 13, the sliding member 600A includes a main body 610A, a protrusion 620A, a first stopper 630A, a second stopper 640A, and a buffer 650A. The sliding member 600A has flexibility. Using this flexibility, the sliding member 600A is attached to the first frame guide 511A. As the sliding member 600A, a member softer than the key 100A or the frame 500A can be used. That is, the Young's modulus of the sliding member 600A is smaller than the Young's modulus of the key 100A or the frame 500A. As the sliding member 600A, for example, a cushioning material such as an elastic body or a nonwoven fabric can be used. As the elastic body, for example, rubber such as nitrile rubber (NBR) or ethylene / propylene / diene rubber (EPDM), or elastomer can be used.

The main body 610A has a shape arranged along the side wall of the first frame guide 511A, and has a length in the third direction D3. The main body 610A is disposed along three side walls of the four side walls of the first frame guide 511A. That is, one side end 612A of the main body 610A is opened. One side end 612A of the main body 610A has flexibility in the first directions D1 and D4. The protrusions 620A are provided on both sides of the sliding member 600A in the first directions D1 and D4, and protrude toward both sides of the first directions D1 and D4, respectively. The protrusion 620A is provided above the main body 610A. In the example of FIG. 13, the protrusion 620A is provided at the upper end of the sliding member 600A. The protrusion 620A is movable in the first directions D1 and D4. In the present embodiment, the sliding member 600A has flexibility, and a first stopper 630A described later is provided at a position different from the protrusion 620A in the second direction D2, and thus both sides of the sliding member 600A. The interval between the protrusions 620A provided on the surface is variable. Note that the position of the protrusion 620A is not limited to the upper side of the main body 610A, and can be changed as appropriate depending on the positional relationship between the first key guide 151A and the first frame guide 511A when the key is pressed and released. Further, the number of protrusions is not particularly limited.

The first stopper 630A is provided above the main body 610A. In the example of FIG. 13, the first stopper 630A is provided at the upper end of the sliding member 600A. The first stopper 630A connects opposing side walls of the main body 610A. The second stopper 640A is provided below the main body 610A. In the example of FIG. 13, the second stopper 640A is provided at the lower end of the sliding member 600A. The second stopper 640A is bent from the tip of the side wall on the second direction D5 side of one of the side walls of the main body 610A. The second stopper 640A is provided with an opening 642A. Of the side walls of the opening 642A, one side wall functions as the locking portion 644A. The functions of the first stopper 630A and the second stopper 640A will be described in detail later.

The buffer portion 650A extends from the main body portion 610A in the first directions D1 and D4 on both sides of the main body portion 610A. The buffer portion 650A is provided with a contact portion 652A that protrudes from the buffer portion 650A in the third direction D3. The buffer portion 650A and the contact portion 652A alleviate the collision between the key 100A and the column 544A when the key 100A is pressed with a strong force. Since the contact portion 652A protrudes in the third direction, when the key is pressed, the key 100A first contacts the contact portion 652A, so that the collision sound between the key 100A and the buffer portion 650A can be reduced. it can. In FIG. 13, the contact portion 652A is illustrated as being provided at the end portion in the second direction D5 of the buffer portion 650A, but may be provided at other positions. A plurality of contact portions 652A may be provided above the buffer portion 650A.

[Mounting structure of sliding member to first frame guide]
FIG. 14 is a perspective view illustrating a state in which the sliding member is attached to the first frame guide according to the embodiment of the present invention. As shown in FIG. 14, in a state where the sliding member 600A is attached to the first frame guide 511A, the first stopper 630A is disposed inside the first recess 5111A. When the first stopper 630A is locked to the inner wall of the first recess 5111A, the movement of the sliding member 600A in the second direction D5 is restricted. Although FIG. 14 shows a configuration in which the first stopper 630A is disposed in the first recess 5111A, the configuration is not limited to this configuration. For example, instead of the first recess 5111A, a stepped portion that the first stopper 630A locks when the sliding member 600A is about to move in the second direction D5 is provided in the first frame guide 511A. May be.

12 to 14 exemplify a configuration in which the first recess 5111A is provided at the upper end of the first frame guide 511A and the first stopper 630A is provided at the upper end of the sliding member 600A, but the present invention is not limited to this configuration. As described above, if the movement of the sliding member 600A in the second direction D5 is restricted, the shapes and attachment positions of the first recess 5111A and the first stopper 630A can be changed as appropriate.

When removing the sliding member 600A from the first frame guide 511A, a pin is inserted from the second recess 5115A below the first stopper 630A, and the first stopper 630A is lifted upward by the pin and the sliding member 600A is removed. What is necessary is just to move to the 2nd direction D5.

As shown in FIG. 14, in a state where the sliding member 600A is attached to the first frame guide 511A, the protrusions 620A provided at both ends in the first directions D1 and D4 are in contact with the first frame guide 511, respectively. . As described above, the sliding member 600A in the region where the protrusion 620A is provided has flexibility in the first directions D1 and D4. Here, due to variations in the shapes of the first frame guide 511A and the sliding member 600A, the width of the first frame guide 511A in the first direction D1 may not match the distance between the two protrusions 620A. For example, when the width of the first frame guide 511A is smaller than the distance between the two protrusions 620A, a gap is generated between the first frame guide 511A and the protrusion 620A. In this case, if the region where the projection 620A is provided in the sliding member 600A does not have flexibility in the first directions D1 and D4, the sliding member 600A will rattle against the first frame guide 511A. . As a result, the key 100A is wobbled. However, even if the region where the protrusion 620A of the flexible sliding member 600A is provided is bent in the first directions D1 and D4, the first frame guide 511A and the protrusion 620A The gap between them disappears. As a result, rattling of the sliding member 600A with respect to the first frame guide 511A can be suppressed.

In the state of FIG. 14, the buffer portion 650A is in contact with the support column 544A. However, the buffer portion 650A may not be in contact with the column 544A.

FIG. 15 is a cross-sectional view of the first guide in one embodiment of the present invention. The cross-sectional view of FIG. 15 corresponds to the cross-sectional view of FIG. As shown in FIG. 15, the pair of protrusions 620A are provided on both sides of the sliding member 600A in the first directions D1 and D4, respectively. In a state where the key 100A is attached to the frame 500A, the protrusion 620A protrudes toward the first key guide 151A. The protrusion 620A slides with the first key guide 151A. The protrusion 620A is a continuous sliding portion.

In a state where the sliding member 600A is attached to the first frame guide 511A, the second stopper 640A contacts the support 544A from below. Further, the second stopper 640A is locked to a protruding portion 5117A provided at the lower portion of the column 544A. Specifically, the protruding portion 5117A is disposed inside the opening 642A shown in FIG. 13, and the locking portion 644A is locked to the protruding portion 5117A. The second stopper 640A regulates the movement of the sliding member 600A in the third direction D3. The protrusion 5117A restricts the movement of the second stopper 640A in the second direction D5. With these configurations, the second stopper 640A suppresses the sliding member 600A from moving in the third direction D3 and being detached from the first frame guide 511A.

In the present embodiment, the configuration in which the sliding member 600A has the protrusion 620A has been described in order to reduce the sliding area. However, the present invention is not limited to this configuration. The protrusion 620A is not provided on the sliding member 600A, and the side surface of the sliding member 600A and the side surface of the first key guide 151A may slide. That is, when the key 100A is viewed from the scale direction, the area where the first key guide 151A and the sliding member 600A overlap may be the sliding area of both.

As described above, according to the keyboard device 1A according to the second embodiment, the sliding member 600A is provided between the key 100A and the frame 500A, so that the design dimension of the first frame guide 511A and the first Even when there is a deviation from the design dimension of the key guide 151A, the deviation of the design dimension can be compensated by adjusting the shape of the sliding member 600A. By attaching the sliding member 600A that is softer than the first frame guide 511A or the first key guide 151A to the first frame guide 511A, noise in the first guide 51A when the key is released can be reduced. Further, with the above configuration, the keyboard device 1A can provide a smooth key operation to the user.

In the above embodiment, (1) the first guide 51, the second guide 53, and the third guide 55 do not line up on the same straight line when the key 100 is viewed in the scale direction, and (2 It is shown that the key fulcrum (rod-shaped flexible member 185), the first guide 51, and the second guide 53 do not line up on the same straight line when the key 100 is viewed in the scale direction. With the configurations (1) and (2), the movement of the key 100 can be restricted in the scale direction, the yawing direction, and the rolling direction. However, in order to obtain this effect, either one of the configurations (1) and (2) may be used. However, it is more effective to have both configurations (1) and (2).

In the embodiment described above, an electronic piano is shown as an example of a keyboard device to which the first guide 51 and the second guide 53 are applied. On the other hand, the first guide 51 and the second guide 53 of the above embodiment can also be applied to an acoustic piano (such as a grand piano or an upright piano). In this case, the sound generation mechanism corresponds to a hammer and a string. The turning mechanism of the above embodiment can also be applied to turning parts other than the piano.

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

1: keyboard device, 10: keyboard assembly, 51: first guide,
53: Second guide, 55: Third guide, 70: Sound source device,
80: Speaker, 90: Housing, 100: Key, 100b: Black key,
100w: white key, 102: lower end, 120: hammer support,
150: recess, 151: first key guide, 153: second key guide,
155: side key guide, 180: connecting portion, 181: plate-like flexible member,
183: Key side support portion, 185: Rod-like flexible member,
200: Hammer assembly, 210: Front end, 220: Shaft support,
230: weight part, 300: sensor, 410: lower stopper,
430: Upper stopper, 500: Frame,
511: First frame guide, 513: Second frame guide,
515: Side frame guide, 520: Rotating shaft,
521: tip frame id, 540: first rib, 542: first wall,
544: support column, 546: top surface,
550: 2nd rib, 551: 3rd rib, 552: 2nd wall part,
554: third wall portion, 585: frame side support portion, 600A: sliding member,
610A: body part, 612A: one side end, 620A: protrusion,
630A: first stopper, 640A: second stopper,
642A: opening, 644A: locking portion, 650A: buffer portion,
652A: contact part, 710: signal conversion part, 730: sound source part,
750: output unit, 5110: protrusion, 5111: first recess,
5113: Curved surface 5115: Second recess 5117A: Projection
5131: 3rd recessed part, 5133: Projection part,
5135, 5137: reinforcement member, NV: non-appearance part, PV: appearance part

Claims

Frame,
A key that rotates relative to the frame about a key fulcrum;
A first guide including a first frame guide connected to the frame and a first key guide connected to the key and sandwiching the first frame guide;
A second key guide connected to the key and a second frame guide connected to the frame and sandwiching the second key guide, the second guide provided below the first guide;
A third guide for restricting movement of the key in the scale direction behind the first and second guides;
With
The three points of the key fulcrum, the first guide, and the second guide, or the three points of the first, second, and third guides are viewed from the first direction in which the keys are adjacent. A keyboard device provided so as not to line up on the same straight line.
The first frame guide slides on a surface of the first key guide;
The keyboard device according to claim 1, wherein the second frame guide slides on a surface of the second key guide.
The second key guide is integral with the key;
The keyboard device according to claim 2, wherein the second frame guide is integral with the frame.
The keyboard device according to claim 3, wherein the second frame guide protrudes in a direction in which the key extends from the frame.
The keyboard device according to claim 4, further comprising a reinforcing member that suppresses deformation of the second frame guide in the first direction between the second frame guide and the frame.
The keyboard device according to claim 4, wherein the second frame guide has a protruding portion that protrudes toward the second key guide and slides with the second key guide.
The area in which the first frame guide and the first key guide slide when viewed from the first direction is such that the first frame guide and the first key guide are viewed from the first direction. The keyboard device according to claim 2, wherein the keyboard device is smaller than an overlapping area.
The keyboard device according to claim 7, wherein the first frame guide includes at least one protrusion that protrudes toward the first key guide and slides with the first key guide.
The keyboard device according to claim 8, wherein the first frame guide has a pair of protrusions protruding in opposite directions toward the first key guide.
The keyboard device according to claim 8 or 9, wherein the protrusion is provided at an upper end of the first frame guide.
The keyboard device according to any one of claims 1 to 10, wherein the first frame guide protrudes upward from the frame.
The first key guide has a pair of inner wall surfaces facing each other, and the first frame guide slides on the pair of inner wall surfaces of the first key guide. Keyboard equipment.
The second frame guide has a pair of opposed inner wall surfaces, and the second key guide slides on the pair of inner wall surfaces of the second frame guide. Keyboard equipment.
The three points of the key fulcrum, the first guide, and the second guide are provided so that they are not aligned on the same straight line when viewed from the direction in which the keys are adjacent to each other. 14. The keyboard device according to claim 1, wherein three portions of the second and third guides are provided so as not to be aligned on the same straight line when viewed from a direction in which the keys are adjacent to each other.