JP7443123B2 - Keyboard device for electronic keyboard instruments - Google Patents

Description

The present invention is applied to an electronic keyboard instrument such as an electronic piano, and relates to a keyboard device for an electronic keyboard instrument that includes a hammer that rotates when pushed up by a pressed key.

Conventionally, this type of keyboard device is known, for example, as described in Patent Document 1 filed by the present applicant. This keyboard device consists of a large number of keys lined up in the left and right direction of an electronic piano, a keyboard chassis that supports these keys, a hammer support connected to the rear end of the keyboard chassis, and a hammer support provided for each key. It consists of a number of hammers that rotate in conjunction with the locked keys. The keyboard chassis is assembled in a cross-shaped structure by three support rails consisting of a front rail, a middle rail, and a rear rail extending in the left-right direction, and a plurality of reinforcing ribs extending in the front-back direction.

Each key extends in the front-rear direction, and is swingably supported through a pin hole near the center by a balance pin erected in a reed fixed to the middle rail of the keyboard chassis. In addition, in the key-released state, each key is held in a tilted position with the rear end of the lower surface resting on the cushion on the rear rail. On the other hand, each hammer is formed into an arm shape extending in the front-rear direction, and is supported at the rear end portion to be freely rotatable in the vertical direction on the hammer fulcrum shaft of the hammer support. It is placed in contact with the rear end of the key from above. In this state, when the key is pressed, the front end of the key goes down and the rear end goes up, and the hammer corresponding to the key is pushed up through the key abutting part. , rotate upward. When the key is pressed all the way, the hammer comes into contact with the upper hammer stopper, and the upward rotation of the hammer ends. Thereafter, when the key is released, the key swings in the opposite direction to when the key was pressed, and accordingly, the hammer also rotates downward, returning to the original key-released state.

Japanese Patent Application Publication No. 2018-155991

As mentioned above, in the above keyboard device, when the key is released, the rear end of the lower surface of each key is placed on the rear rail of the keyboard chassis via the cushion, and the key contacting part of the hammer is placed on the back of the key. placed on the end. Therefore, the height position of the rear end of the lower surface of the key and the key abutting part of the hammer when the key is released is determined by the height of the upper surface of the rear rail. In order to set the rear rail to a certain height, extremely high precision is required for the height of the top surface of the rear rail.

However, due to the structure of the keyboard chassis, in the rear rail described above, a metal plate with a relatively long width is bent along multiple bending lines extending parallel to each other along its length, so the rear rail Machining the top surface height with high accuracy is difficult due to manufacturing limitations. Therefore, for example, if the top surface height of the rear rail is lower than the desired height, a prescribed tape is pasted between the top surface of the rear rail and the cushion, and the top surface height of the rear rail is adjusted depending on the number of pieces of tape. Needs to be fine-tuned. Such adjustment work is time-consuming and extremely complicated. Furthermore, if the key and hammer in the released state are deviated from the appropriate predetermined posture and height, poor pronunciation or unnecessary vibration may occur when the key is pressed.

The present invention has been made to solve the above-mentioned problems, and eliminates the need for conventional adjustment work, and makes it possible to adjust the height position of the rear end of the lower surface of the key and the key abutting part of the hammer when the key is released. , an object of the present invention is to provide a keyboard device for an electronic keyboard instrument that can be easily positioned at a predetermined position, thereby allowing keys and hammers to be properly set at a predetermined posture and height when the key is released. do.

In order to achieve the above object, the invention according to claim 1 is arranged such that each member extends in the front-rear direction, is configured to be swingable about a predetermined position in the length direction as a fulcrum, and is arranged side by side in the left-right direction. A plurality of keys, a hammer support arranged on the rear side of these keys, each extending in the front-rear direction, and supported rotatably in the vertical direction on a hammer fulcrum shaft extending in the left-right direction of the hammer support at the rear end. , a plurality of hammers that abut the rear end of the corresponding key from above through a key contact portion protruding downward from the lower surface; The present invention is characterized in that it includes a key stopper whose end portion abuts from above and holds a plurality of keys at a predetermined key release position , and the key stopper is detachably attached to the hammer support .

According to this configuration, a plurality of keys each extending in the front-rear direction and swingable about a predetermined position in the length direction as a fulcrum are arranged in a line in the left-right direction. In addition, the plurality of hammers, each extending in the front-rear direction, are supported at their rear ends by a hammer fulcrum shaft extending in the left-right direction of the hammer support so as to be freely rotatable in the vertical direction, and a key contact portion protruding downward from the lower surface. is in contact with the rear end of the corresponding key from above. Furthermore, in the key release state, the rear ends of the plurality of keys abut from above against a key stopper provided at the lower part of the hammer support, and are held at a predetermined key release position. In this state, when the key is pressed, the hammer is pushed up through the key contact portion and rotated upward about the hammer fulcrum shaft of the hammer support.

The hammer fulcrum shaft, which is the rotational fulcrum of the hammer mentioned above, and the key stopper, which holds the key in a predetermined key release position, are both provided on the hammer support, so the rear end of the bottom surface of the key in the key release state is The height position of the key abutting part of the key and the hammer can be easily positioned at a predetermined position, and thereby the key and the hammer can be properly set at a predetermined posture and height when the key is released. . As a result, it is possible to prevent poor sound production and unnecessary vibrations when keys are pressed, and unlike conventional methods, there is no need to adjust the height of the rear end of the keys, so keyboard devices can be manufactured more efficiently. can do.
Furthermore, according to the above configuration, the key stopper is detachably attached to the hammer support, so that, for example, when the height position of the rear end of the key is changed due to a change in the model of the keyboard device, By changing only the key stopper, it is possible to easily adapt to changes in the model of the keyboard device.

The invention according to claim 2 is the keyboard device for an electronic keyboard instrument according to claim 1, in which the key stopper includes a stopper body made of synthetic resin that projects forward and extends in the left-right direction across a plurality of keys; It is characterized by having a cushion that extends along the length and is attached to the stopper main body, and that the rear end portions of the plurality of keys abut from above.

According to this configuration, the key stopper has the above-mentioned stopper body and cushion, and since the stopper body is made of synthetic resin, its height position can be set with high accuracy. Further, since a cushion is attached to the stopper main body, when the pressed key returns to the released state, the rear end of the key hits the cushion, making it possible to reduce the generation of noise.

FIG. 1 is a partially cutaway side view of a keyboard device for an electronic piano to which a keyboard device according to an embodiment of the present invention is applied. FIG. 3 is a plan view showing the keyboard chassis with a portion cut away. FIG. 3 is a perspective view showing an example of a white key and a black key. FIG. 6 is a perspective view showing a hammer contact height defining portion attached to the rear end of the key. (a) is a perspective view showing the hammer support, and (b) is a perspective view showing a state in which the stopper body and cushion of the key stopper are removed from the hammer support. (a) is a plan view of the hammer support, and (b) is a front view of the hammer support. It is a perspective view showing the hammer support in a state where a part is notched, (a) the state cut at the position of the attachment part of the key stopper, and (b) the state cut at a position other than the attachment part of the key stopper. shows. It is a perspective view which shows a key stopper, (a) shows the state when seen from the front, (b) shows the state when seen from the back. It is a side view which shows a hammer. FIG. 4 is a diagram for explaining the operation of the hammer when a key is pressed, with (a) showing the key released state and (b) showing the key pressed state.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a keyboard device for an electronic piano according to an embodiment of the present invention in a key-released state.

As shown in the figure, the keyboard device 1 includes a large number of keys 2 (only one white key 2a and one black key 2b are shown) arranged in the left-right direction (front and back direction in FIG. 1) of the electronic piano, and these keys. A keyboard chassis 3 that supports the keys 2, a hammer support 4 connected to the rear end of the keyboard chassis 3 (the right end in FIG. 1), and a hammer support 4 that is provided for each key 2 and that is linked to the pressed key 2. A large number of hammers 5 (only one shown) that rotates when the key 2 is pressed, a large number of let-off parts 6 (only one shown) that are provided for each hammer 5 to give a let-off feeling when the key 2 is pressed, and a key. The key switch 7 includes a key switch 7 for detecting key press information of the key 2, and a key stopper 8 on which the rear end of the lower surface of the key 2 is placed when the key 2 is in the released state.

As shown in FIGS. 1 and 2, each of the keyboard chassis 3 has front rails 11 extending in the left-right direction and arranged at a predetermined interval in the front-rear direction (the left-right direction in FIG. 1, the up-down direction in FIG. 2). , three support rails 10 consisting of a middle rail 12 and a rear rail 13, and a plurality of reinforcing ribs 14 (for example, five) extending in the front-rear direction and arranged at predetermined intervals in the left-right direction from each other (FIG. 1). and (only one is shown in Fig. 2) are assembled in a parallel grid shape. These support rails 10 and ribs 14 are both made of iron plates formed into predetermined shapes by punching and bending using a press, and are connected to each other by screws.

As shown in FIG. 1, the front rail 11 includes a horizontal top plate 11a, a front plate 11b bent downward at right angles from the front end of the top plate 11a, and a front plate 11b bent from the lower end of the front plate 11b. It has a bottom plate portion 11c bent rearward at right angles. A reed front 15 is fixed to the lower surface of the top plate portion 11a by screws or the like. The front reed 15 is formed in the shape of a thick plate made of synthetic resin, and extends in the left-right direction over the entire front rail 11. On this front reed 15, a large number of front pins 16 are installed at front and rear positions corresponding to the white key 2a and the black key 2b, penetrating the top plate part 11a of the front rail 11 and standing side by side in the left and right direction. has been done.

The middle rail 12 has a horizontal reed middle mounting part 12a, the front end of which is bent downward and the rear end bent upward at a right angle. The reed center 17 is mounted on the reed center mounting portion 12a and fixed by screws or the like. The reed center 17 is formed into a thick plate shape made of synthetic resin, and extends in the left-right direction over the entire middle rail 12. A large number of balance pins 18 are erected on this reed center 17 in a state in which they are lined up in the left-right direction at front and back positions corresponding to the white key 2a and the black key 2b. Note that the reed center 17 is made up of a plurality of injection molded products corresponding to one octave at most, and as shown in FIG. 2, these are arranged close to each other and lined up in the left-right direction.

The rear rail 13 has a housing recess 13a that opens upward and engages with the lower part of the hammer support 4 while housing it, and a housing recess 13a that is bent at right angles from the upper end of the front plate of the housing recess 13a and extends horizontally forward. It has a connecting part 13b extending to. A screw hole penetrating in the front-rear direction is formed in the front plate portion of the housing recess 13a, and the front wall portion of the hammer support 4 is screwed thereto. Further, the housing recess 13a and the connecting portion 13b are screwed to the rear end portion of each rib 14.

FIG. 3 shows a white key 2a and a black key 2b. As shown in the figure, the key 2 includes a wooden key body 21 that extends in the front-rear direction and has a rectangular cross section, and a synthetic resin key cover 22 that is glued to the top and front surfaces of the front half of the key body 21. have. A balance pin hole 23 is formed near the center of the key body 21 in the length direction, and the key 2 swings onto the balance pin 18 provided upright in the reed center 17 through the balance pin hole 23. freely supported.

Each balance pin hole 23 has a substantially circular hole formed near the bottom surface of the key body 21, and the entire upper part connected to the hole is formed in the shape of a long hole extending in the length direction of the key body 21. There is. Moreover, felt 23a is provided on the left and right inner surfaces of the balance pin hole 23 in order to smoothly slide the key 2 on the balance pin 18 when the key 2 swings. A cushion 20 is glued to the upper surface of the key body 21 behind the balance pin hole 23, and this cushion 20 allows the front end of the hammer 5 to directly hit the key 2 during performance or maintenance. This will be prevented.

Further, a front pin hole 24 (see FIG. 1) that opens downward is formed at a predetermined position on the front part of the key body 21, and this front pin hole 24 is connected to a front pin provided upright in the front part of the reed 15. 16 prevents the key 2 from shaking in the left-right direction when it swings.

Furthermore, as shown in FIG. 3, the rear end portions of the white key 2a and the black key 2b are provided with a predetermined height at which the lower end of a key contact portion 66 (described later) of the hammer 5 contacts the key 2 in the key-released state. A hammer contact height defining portion 25 is provided for defining the height of the hammer. The hammer contact height defining portion 25 is made of a molded article of a predetermined shape made of hard synthetic resin.

Specifically, as shown in FIG. 4, the hammer contact height defining portion 25 includes an upper piece 31 that extends a predetermined length in the front-rear direction, and a rear piece 32 that is connected to the rear end of the upper piece 31 and extends downward. and a lower piece 33 that connects to the lower end of the rear piece 32 and extends forward for a predetermined length, forming a U-shaped side surface. Furthermore, a side wall 34 that is connected to the upper piece 31 and the rear piece 32 is provided on the left side surface of the hammer contact height defining portion 25 .

The upper piece 31 constitutes the front half thereof, and also includes an upper piece fixing part 31a for fixing the upper piece 31 itself to the rear end of the upper surface of the key 2, and the rear half of the upper piece 31, and the upper surface is It has a hammer receiving part 31b which is formed flat and receives the key contact part 66 of the hammer 5 in a supported manner from below. Most of the upper piece fixing part 31a is formed thinner than the hammer receiving part 31b, and the upper piece 31 is fixed by driving the U-shaped fixing metal fitting 35 into the upper piece fixing part 31a from the outside. It is fixed to the rear end of the upper surface of the key body 21.

The rear piece 32 has a rear piece upper part 32a that is continuous with the hammer receiving part 31b of the upper piece 31 and is formed in a convex shape rearward, and a rear piece upper part 32a that is continuous with the rear piece upper part 32a and extends downward, and is formed with a thin thickness. It has a piece fixing part 32b and a rear piece lower part 32c that is continuous with the lower end of the rear piece fixing part 32b and is formed in a convex shape rearward. The rear piece 32 configured in this manner is fixed to the rear end surface of the key body 21 by driving the U-shaped fixing metal fitting 36 into the rear piece fixing portion 32b from the outside.

The lower piece 33 extends diagonally upward from the lower end of the rear piece 32, and is provided with a lower protrusion 33a at the front end of its upper surface, which abuts against the rear end of the lower surface of the key body 21. Further, the lower piece 33 has a spring property that allows it to bend in the vertical direction using the connection portion with the rear piece 32 as a fulcrum. In addition, the hammer contact height regulating part 25 is designed to reduce the amount of resin used during molding, reduce the weight of the molded product, and prevent sink marks and deformation during molding. , and an upper rear piece 32a and a lower rear piece 32c of the rear piece 32 are formed with cavities that open to the right as appropriate.

In the hammer contact height regulating portion 25 configured as described above, the lower surface of the upper piece 31, the front surface of the rear piece 32, and the side wall 34 are the upper surface, the rear end surface, and the left side at the rear end of the key body 21, respectively. It is firmly attached to the rear end of the key body 21 with the lower piece protrusion 33a of the lower piece 33 in contact with the rear end of the lower surface of the key body 21, and in close contact with three surfaces. By providing such a hammer contact height defining portion 25 at the rear end of all the keys 2, all the hammer contact heights can be adjusted while absorbing variations in the thickness of the rear end of each key body 21. The height of the hammer receiving portion 31b of the contact height defining portion 25 can be set to a constant predetermined height.

The hammer support 4 is composed of an injection molded product made of a predetermined type of synthetic resin (for example, ABS resin), and is made by connecting a plurality of molded products corresponding to one octave at most, so that it covers all the hammers 5. It extends from left to right. As shown in FIG. 1, the hammer support 4 includes a hammer support part 38 that stands upright from the rear rail 13, a switch mounting part 39 that extends diagonally upward from the upper end of the hammer support part 38, and the like. A horizontal pin-shaped hammer fulcrum shaft 41 for supporting each hammer 5 is formed at the upper end of the hammer support portion 38 .

5A and 6 show the hammer support 4 for one octave to which the key stopper 8 is attached, and FIG. 7 shows the hammer support with a portion cut away. As shown in these figures, the hammer support 4 includes a plurality of partition walls 42 that partition adjacent hammers 5 at predetermined intervals from each other in the left-right direction. Each partition wall 42 corresponds to the hammer support part 38, and corresponds to a square wall 43 having a vertically elongated substantially rectangular side shape, and the switch mounting part 39, and is connected to the upper front end of the square wall 43. It is composed of a triangular wall 44 having a substantially triangular side surface shape. In this hammer support 4, all of the rectangular walls 43 have their lower front and lower ends and upper rear ends connected through the front wall 45, the bottom wall 46, and the back wall 47, respectively. , are continuous in the left and right direction. On the other hand, the upper half portions of all the triangular walls 44 are continuous in the left-right direction via the upper wall portion 48.

Moreover, the hammer fulcrum shaft 41 extending in the left-right direction is provided between the adjacent partition walls 42, 42, at a portion where the square wall 43 and the triangular wall 44 are continuous. These hammer fulcrum shafts 41 are arranged in a straight line along an axis extending horizontally in the left-right direction, and the hammer 5 is rotatably supported on each hammer fulcrum shaft 41 .

Furthermore, a key stopper 8 is detachably attached to the front wall portion 45 of the hammer support 4. This key stopper 8 includes a stopper main body 8a that extends in the left-right direction and has a length that is approximately the same as the width dimension in the left-right direction of the hammer support 4, and a stopper main body 8a that extends along the length direction of the stopper main body 8a. The cushion 8b is attached to the protrusion 51.

FIGS. 8A and 8B show the stopper body 8a of the key stopper 8 as viewed from the front and rear, respectively. As shown in both figures, the stopper main body 8a is made of an injection molded product made of a predetermined type of synthetic resin (for example, ABS resin), and includes a protrusion 51 that protrudes a predetermined length forward, and a rear part of the protrusion 51. The side surface is formed into an L-shape with an upright portion 52 that is connected to the end portion and stands up a predetermined length upward. The protruding portion 51 and the upright portion 52 are each formed thick in the portion corresponding to the key 2. Note that the cavity formed in the thick part of the protruding part 51 corresponding to the key 2 is a hollow part to prevent sink marks and deformation during molding.

The stopper body 8a also has a plurality of (seven in FIG. 8(b)) protruding downward from the back surface of the upright portion 52 for a predetermined length to attach the stopper body 8a itself to the front wall 45 of the hammer support 4. A mounting portion 53 is provided. Each mounting portion 53 is formed with a hole 53a for screwing.

On the other hand, the cushion 8b is made of urethane foam, felt, or the like, and is formed into a band shape having a predetermined thickness. This cushion 8b is adhered onto the protrusion 51 of the stopper main body 8a.

As shown in FIG. 7, the key stopper 8 configured in this manner is such that the protruding portion 51 and the upright portion 52 of the stopper body 8a are located in front of the front wall portion 45 and the square wall 43 of the hammer support 4. , all the attachment parts 53 of the stopper body 8a are screwed into the back side of the front wall part 45 of the hammer support 4. Thereby, the key stopper 8 is firmly fixed to the lower part of the hammer support 4.

FIG. 9 shows the hammer 5 on an enlarged scale. As shown in the figure, the hammer 5 includes an arm-shaped hammer body 61 extending in the front-rear direction, and two weight plates 63 (one in FIG. (only one is shown). The hammer body 61 is made of hard synthetic resin, and the weight plate 63 is made of metal such as iron, which has a relatively large specific gravity.

An engaging portion 64 that engages with the hammer fulcrum shaft 41 of the hammer support 4 is provided at the rear end of the hammer body 61 . This engaging portion 64 is formed with an arcuate shaft hole 65 having a C-shaped side surface. Further, a key abutting part 66 is provided at a predetermined position on the bottom rear part of the hammer body 61, which protrudes downward and abuts the hammer abutting height defining part 25 provided at the rear end of the key 2 from above. There is.

Further, the hammer body 61 is provided with an actuator section 67 at the upper front side of the engagement section 64 at the rear end, which is actuated by pressing the key switch 7 when the key is pressed. Further, the hammer body 61 is provided with a plate-shaped engagement protrusion 68 near the center of its upper surface in the front-rear direction, which engages with the let-off component 6 when a key is pressed.

The hammer 5 configured as described above can be attached to and removed from the hammer fulcrum shaft 41 of the hammer support 4 through the opening of the shaft hole 65, and the shaft hole 65 is fitted into the hammer fulcrum shaft 41. In this state, it is rotatably supported by the hammer support 4.

Next, the operation of the keyboard device 1 configured as described above will be explained with reference to FIG. 1 and FIG. 10 described above. FIG. 10(a) shows an enlarged view of the rear part of the keyboard device 1 in the key-released state shown in FIG. In this key release state, the lower part 32c of the rear piece of the hammer contact height defining part 25 provided at the rear end of the key 2 is placed on the cushion 8b of the key stopper 8. As a result, all keys 2 are held at the key release positions shown in FIG. Further, in this key-released state, the key abutting portion 66 of the hammer 5 is placed in a state in which it abuts the hammer receiving portion 31b of the hammer abutting height defining portion 25 of the key 2 from above.

When the key 2 is pressed from the above-described key-released state, the key 2 rotates counterclockwise in FIG. The hammer is pushed up through the hammer fulcrum shaft 41 and rotated upward (clockwise in FIGS. 1 and 10) about the hammer fulcrum shaft 41.

During the rotation of the hammer 5, the engagement protrusion 68 engages with the head 6a at the tip of the let-off component 6, compressing and pressing the let-off component 6 through the head 6a. , the reaction force acting on the hammer 5 from the let-off part 6 increases. As the hammer 5 continues to rotate, the engagement protrusion 68 disengages from the head 6a, and the reaction force from the let-off component 6 rapidly disappears. This increase and disappearance of the reaction force of the let-off component 6 provides a let-off feeling similar to that of an acoustic piano.

Thereafter, as shown in FIG. 10(b), the front end of the hammer 5 comes into contact with the hammer stopper 70 provided at the upper part of the front end of the hammer support 4, thereby completing the upward rotation of the hammer 5. Also, during the upward rotation of the hammer 5, the actuator section 67 presses the key switch 7, and by turning on the key switch 7, key press information of the key 2 corresponding to the amount of rotation of the hammer 5 is detected. and output to a pronunciation control device (not shown). Then, the sound generation control device controls the sound generation of the electronic piano based on the detected key press information.

Thereafter, when the key 2 is released, the key 2 rotates in the opposite direction to that when the key was pressed and returns to the released state shown in FIGS. 1 and 10(a), and accordingly, the hammer 5 also rotates. It rotates downward and returns to the key release state.

As described in detail above, according to the present embodiment, both the hammer fulcrum shaft 41, which is the rotational fulcrum of the hammer 5, and the key stopper 8, which holds the key 2 at a predetermined key release position, are attached to the hammer support. 4, the rear end of the lower surface of the key 2 and the key contact portion 66 of the hammer 5 can be easily positioned at predetermined height positions when the key is released. The key 2 and hammer 5 can be properly set at a predetermined posture and height. As a result, it is possible to prevent poor sound production and unnecessary vibrations when keys are pressed, and unlike conventional methods, there is no need to adjust the height of the rear end of the key 2, so the keyboard device 1 can be used more efficiently. Can be manufactured well.

Further, in the key stopper 8, since the stopper main body 8a is made of synthetic resin, its height position can be set with high accuracy. In addition, since a cushion 8b is attached to the protrusion 51 of the stopper main body 8a, when the pressed key 2 returns to the released state, the rear end of the key 2 hits the cushion 8b. The generation of noise can be reduced.

Further, since the key stopper 8 is detachably attached to the hammer support 4, for example, if the height position of the rear end of the key 2 is changed due to a model change of the keyboard device 1, the key stopper 8 can be easily attached to the hammer support 4. By changing only the stopper 8, it is possible to easily adapt to changes in the model of the keyboard device.

Note that the present invention is not limited to the above-described embodiments, and can be implemented in various forms. For example, in the embodiment, the hammer support 4 and the key stopper 8 are configured as separate parts, but it is also possible to configure the hammer support 4 and the stopper body 8a of the key stopper 8 by integral molding. Further, the detailed configuration of the keyboard device 1 shown in the embodiment is merely an example, and can be changed as appropriate within the scope of the spirit of the present invention.

1 Keyboard device 2 Key 2a White key 2b Black key 3 Keyboard chassis 4 Hammer support 5 Hammer 8 Key stopper 8a Stopper body 8b Cushion 21 Key body 41 Hammer fulcrum shaft 51 Projection part of stopper body 52 Standing part of stopper body 53 of stopper body Mounting part 66 Key contact part

Claims (2)

A plurality of keys each extending in the front-rear direction, swingable about a predetermined position in the length direction as a fulcrum, and arranged in a row in the left-right direction;
A hammer support placed on the back of these keys,
Each extends in the front-rear direction, is supported at its rear end so as to be rotatable in the vertical direction on a hammer fulcrum shaft extending in the left-right direction of the hammer support, and is connected to the corresponding a plurality of hammers that abut the rear end of the key from above;
a key stopper provided at a lower part of the hammer support, with which rear end portions of the plurality of keys abut from above in a key release state to hold the plurality of keys at a predetermined key release position;
Equipped with
A keyboard device for an electronic keyboard instrument , wherein the key stopper is detachably attached to the hammer support . The key stopper is
a stopper body made of synthetic resin that protrudes forward and extends in the left-right direction across the plurality of keys;
a cushion that extends along the length of the stopper body and is attached to the stopper body, and that the rear end portions of the plurality of keys abut from above;
2. The keyboard device for an electronic keyboard instrument according to claim 1, further comprising:

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