JP3519549B2 - Keyboard capstan adjustment device and keyboard device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard capstan adjusting device for a keyboard musical instrument such as an acoustic piano or an electronic musical instrument, and a keyboard device using the capstan adjusting device.

[0002]

2. Description of the Related Art Conventionally, a keyboard device used in an acoustic piano has its key-pressing action converted into an upward action by the keyboard, and a capstan button on the keyboard pushes up an action wippen. As a result, the striking action by the hammer provided for the action is realized.

Recently, some electronic pianos use a pseudo-action that imitates the action of an acoustic piano in order to realize the touch of the acoustic piano. Even in such a keyboard musical instrument, the key pressing action is converted to the upward action by the keyboard only by the hammer not striking the strings, and the capstan button pushes up the action wippen.

[0004]

In such an acoustic piano and an electronic piano provided with a pseudo-action, it is necessary to adjust the protrusion amount of the capstan button from the keyboard in order to adjust the touch of the keyboard. is there.

Since the capstan button is screwed into the keyboard by its threaded portion, the amount of protrusion can be adjusted by rotating the capstan button. However, the space between the keyboard and the wippen was narrow, and rotating the capstan button was a tedious task. That is, in order to rotate the capstan button screwed to the keyboard, insert a slender rotary operation tool with a sharp tip or hexagonal wrench into the gap between the keyboard and the wippen to rotate the capstan button. It is necessary to insert it into the hole provided on the side surface of the and to engage with the side surface. But,
If the adjustment is insufficient even if the rotary operation tool is shaken to the left or right all the way, once remove the rotary operation tool from the capstan button, and again from the other direction, attach the rotary operation tool to the capstan button. It was necessary to fit it and shake the rotary operation tool to the left or right.

In an electronic piano equipped with a pseudo-action, the internal mechanism such as an action is made compact, and the space between the keyboard and the wippen is particularly narrowed. Therefore, even the rotary operation tool can be properly capped. It is difficult to insert the stun button into the hole on the side surface or engage the side surface with the side surface, and it is difficult to adjust the rotary operation tool by swinging it left and right, which causes a problem in the adjustment efficiency of the keyboard touch.

Therefore, the present invention has been made for the purpose of facilitating the adjustment of the vertical position of the contact portion between the capstan button and the wippen in a keyboard device such as an acoustic piano or an electronic piano equipped with a pseudo-action. It is a thing.

[0008]

The capstan adjusting device for a keyboard according to the present invention is swingably attached to the keyboard side, and the vertical position of the contact portion with the lower surface of the wippen is changed according to the swing. It has a capstan button that changes, a rotary operation head and a screw part, and is screwed to the screw part on the keyboard side provided on the front side of the capstan button with the screw part, and the screw part. And a screw member whose tip portion penetrates a part of the keyboard and comes into contact with the capstan button.

As described above, in the present invention, the screw member to be rotated and the capstan button are constructed separately. The vertical position of the capstan button is adjusted by rotating the rotary operation head of the screw member so that the tip of the screw portion swings the capstan button. This allows the touch of the keyboard to be adjusted.

Since it is sufficient that the tip of the threaded portion of the screw member is in contact with the capstan button, the position and inclination of the screw member when screwed into the screwed portion on the keyboard side can be selected within a relatively wide range. it can. That is, the degree of freedom of arrangement and angle is high.
In the past, since the screw member itself was a capstan button, the head of the screw member had to come into contact with the wippen, so the arrangement and angle were extremely limited, making it difficult to insert and operate the rotary operation tool. Met.

In the present invention, since the head for rotating the screw member does not need to contact the wippen, the screw member has a high degree of freedom in arrangement and angle, and is arranged at a position and angle where the rotary operation tool is easy to operate. be able to. For example, the rotary operation head can be arranged at a position and angle where a linear rod-shaped driver or the like generally known as a rotary operation tool can be inserted and operated.

In order to swingably attach the capstan button to the keyboard, for example, the keyboard and the capstan button are integrally molded with plastics, and the keyboard and the capstan button are connected by a hinge portion. It can be done by things. The threaded portion may have a shape projecting upward, and a capstan button may be swingably connected near its tip. In this case, for example, the capstan button is hung down to one side of the threaded portion, the screw member penetrates the threaded portion from the other side of the threaded portion, and the capstan button is inserted at the tip of the threaded portion. When the tip end portion of the screw portion is changed by the rotation of the screw member, the capstan button can be swung to adjust the vertical position of the wippen.

The screw member is on the front side of the keyboard (player side).
If it is screwed into the threaded portion at an angle to, the rotary operation tool can be inserted from the space above the keyboard and engaged with the rotary operation head to rotate the screw member, so that the rotary operation is efficient. Becomes In particular, as described above, since it is possible to use a linear rod-shaped driver as the rotary operation tool, it is possible to use an ordinary tool, which is advantageous in terms of cost, and the rotary operation becomes more efficient.

A keyboard device incorporating such a capstan adjusting device can be realized by mounting the capstan adjusting device near the rear end of a normal keyboard.
In addition to this, the following keyboard device may be used. For example, one end side is a key pressing operation part and the other end side is a shaft supporting part, and when a key pressing operation is applied to the key pressing operating part, a front keyboard part that swings around the shaft supporting part and one end side is the front side. It is arranged below the keyboard portion, and the other end side projects rearward from the pivotal support portion of the front keyboard portion, and is swingably supported between both ends by an axis substantially parallel to the swing axis of the front keyboard portion. Along with
An action lever that lifts the other end when pressed from above by the front keyboard portion at one end side, and an action that interlocks with the action lever, the action lever as a part of the keyboard, the action lever after the action lever. The capstan adjusting device described above may be provided on the end side.

As described above, when the keyboard is constructed by stacking the keyboard in two stages, it becomes more and more difficult to insert the rotary operation tool with the conventional capstan button, and the rotary operation becomes extremely inefficient. In the capstan adjustment device, since the capstan button and the screw member are separated from each other, there is a high degree of freedom in the arrangement of the screw member, and it is easy to insert a rotary operation tool for rotary operation.

Furthermore, since the required length of the front keyboard portion is from the key depression operation portion to the pivotal support portion and does not extend directly to the action, the length of the front keyboard portion is sufficiently short. The action lever transmits the key depression operation of the short front keyboard portion to the action side. The action lever has one end located below the front keyboard, the other end protruding rearward from the pivotal support of the front keyboard, and swinging between both ends on an axis substantially parallel to the swing axis of the front keyboard. It is movably supported. Then, when one end side is pressed from above by the front keyboard portion, the other end side is lifted. Therefore, through the action lever, like the conventional keyboard,
A key depression operation can be transmitted to an action. This action lever is shorter than the conventional keyboard. In this way, since the short front side keyboard portion and the short action lever are combined, it is not necessary to use a conventional long keyboard, and even when used for a long period of time, the short keyboard and the short action lever are unlikely to be distorted. Therefore, maintenance is reduced. In particular, if one end side of the action lever is arranged below the region between the key depression operation part and the pivotal support part in the front keyboard part, the action lever can be further shortened, and the action lever is further distorted. Can be suppressed.

Further, the action may be an action used for a normal acoustic piano,
It may be a pseudo-action that interlocks with the action lever and simulates the action of an acoustic piano. Although the key pressing operation is transmitted to the action side through the contact portion of the capstan button, the contact portion may be arranged below the upper surface position of the front keyboard portion. According to this structure, the action can be arranged at a position lower than the front keyboard portion as compared with the conventional case, the height of the entire keyboard device can be reduced, and the size can be reduced.

Further, if the contact portion of the capstance button for transmitting the key pressing operation to the action side is arranged below the swing axis position of the front keyboard portion, the height of the keyboard device is further lowered. be able to. As a pseudo-action, a wippen that swings while being pushed up by the contact portion of the capstans button as the action lever swings due to a key depression operation on the front keyboard portion, and a swingable pivotally supported by the wippen. A jack that swings while rising as the wippen swings, and while the jack rises to a predetermined position, it is pushed up and swings by this jack, and after the jack rises to a predetermined position, it separates from the jack. A bat that inertially moves, a pseudo hammer portion that is provided to the bat, and a hammer stopper that abuts the pseudo hammer portion that is inertially moving to prevent the movement of the bat, can be configured as an acoustic piano. It is possible to generate almost the same touch feeling.

In particular, if the action lever and the wippen are made of plastics, compared to the case where wood is used, distortion does not occur particularly for a long period of time, so that maintenance is further reduced. Further, if the keyboard is made of plastics, it is more preferable to reduce maintenance, and if the jack is made of plastics, it is further preferable to reduce maintenance.

Examples of such plastics include, for example, methyl methacrylate polymer and methyl methacrylate.
Acrylic resin such as styrene copolymer, AS resin (SA
N resin), ABS resin, and other synthetic resins. When used as a keyboard device for an electronic musical instrument, a sensor for detecting swing of the action lever due to a key depression operation may be provided below one end of the action lever that is pressed from above by the front keyboard portion.

[0021]

1 and 2 show partial cross-sectional views of a keyboard device 2 according to an embodiment of the present invention, FIG. 1 shows a state in which a white key 10 is attached to the keyboard device 2, and FIG. The attachment state of the black key 12 in the keyboard device 2 is shown.

Metal legs 6a are fixed on the shelf board 4,
On this leg portion 6a, at a position separated from the shelf plate 4 by a predetermined distance,
The metal chassis 6 is fixed. The leg portion 8 of the shaft portion 10a is fixed to the rear end portion 6f side of the chassis 6, and the front keyboard portion 10 and 12 is provided on the leg portion 8 at one end of the front keyboard portions 10 and 12 ( Corresponds to the shaft support) 1
It is swingably attached at 0a. This shaft 10
The rocking axes of the front keyboard parts 10 and 12 according to a are arranged parallel to the surface of the shelf board 4, that is, in the horizontal direction. Therefore, the tip parts 10b and 12b of the front keyboard parts 10 and 12 are
It can swing up and down.

Further, the front end portions 10 of the front keyboard portions 10 and 12 are
In the vicinity of b and 12b, hook-shaped arms 10c,
12c is protruding. Hook-shaped arm 10c on the side of the white key 10
The hook portion 10d is bent at a right angle in the direction of the shaft portion 10a, and the hook-shaped arm 12c on the black key 12 side has the hook portion 12d.
Is bent at a right angle in the direction of the tip portion 12b.

The front keyboard parts 10 and 12 are made of synthetic resin and are formed in a hollow shape in which reinforcing ribs are arranged in places.
The front end portion 6b of the chassis 6 has two long felts 14a, 14b, 16 for cushioning, two in parallel on each of the upper and lower surfaces.
a and 16b are arrangement directions of the front keyboard parts 10 and 12 (see FIG.
2 is attached along the direction perpendicular to the paper surface of FIG.

Tip portions 10b, 1 of the front keyboard portions 10, 12
When the player does not push down the key-depressing operation portions 10e and 12e on the 2b side, the hook portions 10d and 12d are connected to the front end portion 6b.
The long felts 14b and 16b on the lower surface are brought into contact with the front keyboard portions 10 and 12, respectively, and the rocking of the front keyboard portions 10 and 12 is stopped.

When the player depresses the key-depressing operation portions 10e and 12e, the lower surface 1 of the front keyboard portion 10 and 12 is depressed.
0f and 12f are long felts 14 on the upper surface of the front end portion 6b.
a, 16a, respectively, to contact the front keyboard portion 10, 12
Will stop swinging further down.

Keyboard guide portions 7a and 7b are projected upward on both front and rear sides of the front end portion 6b of the chassis 6.
The keyboard guide portions 7a and 7b are inserted into the hollow front keyboard portions 10 and 12, and serve to guide the front end portions 10b and 12b of the front keyboard portions 10 and 12 so as not to swing to the left or right when a key is pressed. Is fulfilling.

An action lever 18 is provided below the front keyboard parts 10 and 12 on the side of the shaft part 10a.
8a, the chassis 6 is swingably supported by a substantially U-shaped bearing member 6c. From the top of the swing shaft 18a, the bearing member fixing plate 6 that is attached to the chassis 6 in a cantilever manner.
d is abutted so that the swing shaft 18a is prevented from coming off the bearing member 6c.

The action lever 18 has a swing shaft 1
An operation end 18b and a swing end 18c are provided so as to sandwich 8a. The operation end 18b can move between above and below the chassis 6 via the opening 6e of the chassis 6 when the action lever 18 swings. A sliding tape 20 having a small surface frictional resistance is provided on the upper side surface of the tip of the operation end 18b.
The sliding tape 20 is provided with a front keyboard portion 1
The tip ends of actuators 10g and 12g projecting downward in the region between the 0 and 12 key-depressing operation portions 10e and 12e and the leg portion 8 of the shaft portion 10a, respectively.

Below the operating end 18b, the front keyboard portion 1 is provided.
A substrate 28 is bridged in the arrangement direction of 0 and 12, and a key depression detection sensor 30 is provided at a position corresponding to each action lever 18. The operating end 18b is the actuator 10.
When pressed by g and 12g, the key-depression detection sensor 3
The timing and velocity of the key depression operation can be obtained by the on / off timing of the two switches within 0 and the difference between the timings.

The swinging end 18c projects into the lower space 22a on the pseudo action 22 side through the opening 6g of the leg 6a on the rear end 6f side of the chassis 6. As shown in the enlarged view of FIG. 3, a balance weight 24 is provided in the weight storage portion 24a at the tip of the swing end 18c, and a screwing portion 25 that protrudes upward is adjacent to the weight storage portion 24a. It is provided.

The screwing portion 25 is slanted forward so that the rotary operation head 26a of the screw member 26 faces the space direction above the front keyboard portion 10 through the space between the front keyboard portion 10 and the pseudo action 22. The screw member 26 is screwed into the screw portion 26b in a posture in which the screw member 26 is inclined. Then, the screw part 26
b penetrates the threaded portion 25 obliquely downward, and the tip portion 26c of the threaded portion 26b projects into the space 24b between the weight storage portion 24a and the threaded portion 25.

A capstan button 27 is provided in the space 24b.
The lower end portion 27a side of the capstan button 27 is stored.
The upper end portion 27b of the above-mentioned protrudes upward from the space 24b and contacts and supports the wippen cloth 36a provided on the lower surface of the wippen 36 of the pseudo action 22. That is, the tip of the upper end portion 27b forms a contact portion with the wippen 36. A hinge portion 27c is provided between the lower end portion 27a and the upper end portion 27b to swingably connect the screwing portion 25 and the capstan button 27. In FIG. 3, the capstan button 27 as a whole is slightly over the upper end portion 2.
7b is tilted to the right.

The tip portion 26c of the screw portion 26b is in contact with the lower end portion 27a of the capstan button 27 from the left side in FIG. Therefore, when the rotary operation head 26a is rotated clockwise (clockwise), the screw portion 26b is screwed in, the tip portion 26c is further projected into the space 24b, and the tip portion 26c is the lower end portion of the capstan button 27. Press 27a to move it to the right. As a result, the hinge portion 27
The capstan button 27 swings counterclockwise about c, and the entire capstan button 27 rises, and the position of the upper end 27b moves a little upward, as shown by the alternate long and short dash line in FIG. Push up 36.
Conversely, when the rotary operation head 26a is rotated counterclockwise (counterclockwise), the screw portion 26b is unscrewed and the space 24b is rotated.
The amount of protrusion of the inner tip portion 26c is reduced, and the wippen 3
Due to the pressure from 6, the lower end portion 27a of the capstan button 27 moves to the left. As a result, the capstan button 27 swings clockwise (clockwise) around the hinge portion 27c, and the entire capstan button 27 leans to the right. Therefore, the position of the upper end portion 27b moves slightly downward, and the wippen 36 lowers.

The rotation operation head 26a of the screw member 26 is rotated by a straight rod-shaped driver D, which is a general rotation operation tool, from the space above the front keyboard section 10 to the front keyboard section 10 as shown in FIG. It can be easily rotated by inserting it between the and the pseudo action 22 and engaging with the rotary operation head 26a of the screw member 26. Therefore, capstan button 2
It is easy to adjust the touch feeling of the front keyboard parts 10 and 12 depending on the vertical position of 7.

The pseudo action 22 performs an action simulating the action of an acoustic piano, and includes a wippen 36, a jack 38, a bat 40 and a stop rail 42. The wippen 36 is swingably supported by a center rail 46 via a wippen flange 44, and the capstan button 27 rises in response to a key pressing operation, so that the wippen 36 is in a direction opposite to the swing direction of the front keyboard parts 10 and 12, that is, in FIG. 1 and 2 swing clockwise. A back check 48 is supported by the support wire 50 on the wippen 36.

The jack 38 is swingably connected to the wippen 36 and ascends together with the wippen 36 until the jack tail 38 a contacts the regulating rail 52. The regulating rail 52 has a regulating bracket 54 extending from the center rail 46.
It is fixed at the tip of.

The bat 40 abuts and separates from the jack 38, and is swingably supported by a center pin 40b on a bat flange 40a fixed to a center rail 46. A pseudo hammer member 58 is screwed to the upper portion of the bat 40. The pseudo hammer member 58 is formed by pressing a metal plate and curling the curl portion 5.
8a and a rest portion 58b that is folded back at an acute angle are formed, and swing together with the bat 40.

The height of the pseudo hammer member 58 is formed to be considerably lower than that of a normal hammer assembly (for example, about 1/2 to 1/20). Also, bat 4
A catcher member 64 is fixed to the side portion of 0 so as to project toward the front keyboard portions 10 and 12.

The stop rail 42 includes the front keyboard portion 10,
12 extend in the arranging direction and are supported by brackets 59 at both ends, and are provided so as to cover the pseudo hammer member 58 of the bat 40. The stop rail 42 includes a hammer stopper portion 42a, a hammer rail portion 42b and a catcher stopper portion 42c.

The hammer stopper portion 42a can come into contact with the curl portion 58a of the pseudo hammer member 58 that is swung by pressing the key, and the hammer rail portion 42b can come into contact with the rest portion 58b of the pseudo hammer member 58 in the stationary position. Is. The hammer stopper portion 42a and the hammer rail portion 42b are provided with cushioning materials 60 on opposite surfaces of the stop rail 42 at positions where the center pin 40b is interposed therebetween.
It is formed by sticking (for example, felt or urethane rubber). On the other hand, the catcher stopper portion 42c is provided with the catcher member 64 that is swung by the key depression.
It is formed by sticking a cushioning material 60 (for example, felt or urethane rubber) at a position where it can come into contact with.

In the keyboard device 2 configured as described above, the weight of the wippen 36 or the like of the pseudo-action 22 passes through the capstan button 27 and the swing end 18c of the action lever 18 when the key is not depressed. I'm sick. The weight of the weight 24 is also applied to the swing end 18c. Therefore, the action lever 18 is shown in FIGS.
There is a clockwise swinging moment at
As a result, the operating end 18b of the action lever 18 lifts the actuators 10g and 12g of the front keyboard parts 10 and 12. Therefore, the front keyboard parts 10 and 12 try to swing clockwise in FIGS. 1 and 2, but the hook-shaped arms 10c and 12c contact the long felts 14b and 16b, and the swinging is blocked. It has stopped in the state.

When the performer pushes down the key depression operation parts 10e, 12e of the front keyboard parts 10, 12, the front keyboard parts 10, 1 are released.
2 swings counterclockwise in FIGS. 1 and 2 with the shaft portion 10a as a swing shaft. As a result, the operating end 18b of the action lever 18 moves the actuator 10g, 12
Since it is pushed down to g, the action lever 18 swings counterclockwise about the swing shaft 18a, and the swing end 18
The capstan button 27 of c swings the wippen 36 of the pseudo action 22 clockwise so as to lift it.

With the swing of the wippen 36, the jack 38 swings counterclockwise with respect to the wippen 36 while rising so as to push up the bat 40. After that, when the jack tail 38a of the jack 38 hits the regulating rail 52, the jack 38 will be jack 38
It rapidly rocks counterclockwise around the contact point between a and the regulating rail 52 as a fulcrum, and the tip of the jack 38 comes out of the bat 40. The tip of this jack 38 is the bat 4.
The action to exit from 0 is let-off. Therefore, the let-off can be generated in the pseudo action 22 as in the normal action.

After the let-off, the bat 40 continues to swing clockwise by inertial movement together with the pseudo hammer member 58 and the catcher member 64. After that, the curl portion 58a of the pseudo hammer member 58 performing this inertial collision collides with the cushioning material 60 attached to the hammer stopper portion 42a of the stop rail 42, and at the same time, the catcher member 64 also catches the catcher stopper of the stop rail 42. It collides with the cushioning material 60 attached to the portion 42c. As a result, the bat 40 is prevented from inertial movement and swings back in the opposite direction, that is, counterclockwise. Since the impact force due to this collision is dispersed at two locations (hammer stopper portion 42a and catcher stopper portion 42c), the stability and durability of the entire swing system is improved.

When the bat 40 swings back and the player's finger is separated from the front keyboard parts 10 and 12, the rest part 58b of the pseudo hammer member 58 is attached to the hammer rail part 42b of the stop rail 42. It comes into contact with the existing cushioning material 60 and stands still in that state. On the other hand, when the bat 40 swings back together with the pseudo hammer member 58 and the catcher member 64, if the front keyboard parts 10 and 12 are still pressed down, as shown in FIGS. The catcher member 64 is received by the felt 48a of the back check 48 at the back stop position before the contact between the cushioning member 60 attached to the hammer rail portion 42b of the stop rail 42 and the contact member 58b. The catcher member 64 is received by the felt 48a of the back check 48 as a back stop.

Therefore, the function of the pseudo action 22 is the same as the action of the acoustic piano except that the pseudo hammer member 58 does not strike the strings. Therefore, the feeling of touch that the player receives from the front keyboard parts 10 and 12 is almost the same as that of the acoustic piano.

Further, as shown in FIGS. 4 and 5, the lower side of the operation end 18b of the action lever 18 comes into contact with the key pressing detection sensor 30 when the key is pressed, and the two switches inside the key pressing detection sensor 30 are turned on / off. Since it is operated, the key depression timing and its velocity can be detected, and the electronic tone generator controls the pitch and velocity corresponding to the keyboard at the timing corresponding to the key depression based on the detection. A performance sound can be output with a corresponding strength.

In the keyboard device 2 configured as described above, since the screw member 26 and the capstan button 27 are separately configured as described above, the degree of freedom of arrangement of the screw member 26 is large, and FIG. As shown in FIG. 7, the linear rod-shaped driver D can be screwed onto each action lever 18 at a position and inclination where it can be used as it is. The operation of the driver D is only to rotate the shaft and does not shake it to the left or right. Therefore, unlike the conventional case, a space for swinging to the left and right is not required. Therefore, even if the keyboard device 2 and the pseudo action 22 are combined with high density, the vertical position adjustment of the capstan button 27 is very efficient. You will be able to do it.

Further, the capstan button 27 is swingably connected to the action lever 18 at a hinge portion 27c, but the action lever 18, the capstan button 27 and the hinge portion 27c are integrally molded of plastics. Therefore, it is easy to manufacture.

Further, the keyboard device 2 of this embodiment is provided with front keyboard parts 10 and 12, an action lever 18 and a pseudo action 22, and the lengths of the front keyboard parts 10 and 12 are as follows.
The length is from the key-depressing operation portions 10e and 12e to the shaft portion 10a supported by the leg portion 8, and the lengths of the front keyboard portions 10 and 12 are sufficiently shorter than those of conventional keyboards. It is the action lever 18 that transmits the key depression operation of the front keyboard portions 10 and 12 to the pseudo-action 22 side. One end side (operation end 18b) of the action lever 18 is located below the front keyboard portions 10 and 12. Located at the other end (swing end 18c)
Is projected to the outside of the front keyboard parts 10 and 12 more than the shaft part 10a of the front keyboard parts 10 and 12 and is inserted into the lower space part 22a of the pseudo action 22. This action lever 18 is also sufficiently shorter than the conventional keyboard.

Due to the existence of this action lever 18,
Even with the short front keyboard parts 10 and 12 up to the shaft part 10a, the key pressing operation can be transmitted to the pseudo action 22 as in the conventional keyboard as described above. In this way, since the short front keyboard parts 10 and 12 and the short action lever 18 are combined, it is not necessary to use a conventional long keyboard, and even when used for a long period, the short front keyboard part 1 is short.
Distortion is unlikely to occur between 0 and 12 and the short action lever 18. Therefore, maintenance is reduced. In particular, since one end (operation end 18b) side of the action lever 18 is arranged below the region between the key depression operation parts 10e, 12e and the shaft part 10a in the front keyboard parts 10, 12, the action lever 18 is formed. Can be further shortened, and the occurrence of distortion of the action lever 18 can be further suppressed.

The swing lever 18c of the action lever 18 is provided with a capstan button 27, and the tip of the capstan button 27 transmits the key depression operation to the pseudo action 22 side. Since it is arranged below the position of the shaft portion 10a of the front keyboard portions 10 and 12, the pseudo action 22 can be arranged below the conventional position, and the height of the keyboard device 2 can be lowered. You can

Here, since the front keyboard parts 10 and 12, the action lever 18, the wippen 36, the jack 38, the butt flange 40a, the wippen flange 44 and the bat 40 are made of plastic such as synthetic resin, wood is used. In comparison with the case of using, distortion does not occur particularly for a long period of time. Therefore, maintenance is sufficiently reduced. These members may be made of metal, and distortion is less likely to occur. It is most preferable that the action lever 18 and the wippen 36 are made of synthetic resin or metal in order to maintain accuracy. Further, the front keyboard section 10, 12 and then the jack 38
Is preferably made of synthetic resin or metal.
Other configurations may be made of wood, synthetic resin, or metal.

[Others] In the above embodiment, since the configuration as the electronic piano is illustrated, the pseudo action 22 is performed.
However, instead of the pseudo action 22, an action used in a normal acoustic piano may be used to configure the acoustic piano. Also in this configuration, the height of the capstan button 27 can be adjusted efficiently, and the height of the action portion can be reduced to make the acoustic piano compact, and the keyboard can be shortened further. Since it is made of resin, it is advantageous in terms of maintenance.

Although the above example is an example of an upright type piano, it may be an electronic piano using a pseudo action of a grand type piano or may be applied to a grand type acoustic piano.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a white key portion of a keyboard device 2 according to an embodiment.

FIG. 2 is a partial cross-sectional view of a black key portion in the keyboard device 2 as one embodiment.

FIG. 3 is an enlarged view of the threaded portion, a capstan button, and a wippen.

FIG. 4 is an explanatory diagram showing a state where a white key is operated in the keyboard device 2 as one embodiment.

FIG. 5 is an explanatory diagram showing a state where a black key is operated in the keyboard device 2 as one embodiment.

[Explanation of symbols]

2 ... Keyboard device 4 ... Shelf plate 6 ... Chassis
Reference numeral 6a ... Leg portion 6b ... Front end portion 6c ... Bearing member 6d ... Bearing member fixing plate 6e ... Opening portion 6f ... Rear end portion 6g ... Opening portion 8 ... Shaft leg portion 10, 12 ... Front keyboard portion (10 ... White key) , 12 ... Black key) 10a ... Shaft part 10b, 12b ... Tip part 10c, 12c ... Hook-shaped arm 10d, 12d ... Hook part 10e, 12e ... Key pressing operation part 10f, 12f ... Lower surface 10g, 12g ... Actuator 14a, 14b. , 16a, 16b ... Long felt 18 ... Action lever 18a ... Swing shaft 18b
Operating end 18c Swinging end 20 Sliding tape 22 Pseudo-action 24 Weight 24a Weight storage 24b Space
25 ... Screwing portion 26 ... Screw member 26a ... Rotating operation head 26b
... screw part 26c ... tip part of screw part 27 ... capstan button 27a ... lower end part 27b ... upper end part 27c ... hinge part 28 ... board 30 ... key detection sensor 36 ... wippen 36a ... whippen cross 38 ... jack 38a ... jack tail 40 ... Bat 40a ...
Bat flange 40b ... Center pin 42 ... Stop rail 42a ... Hammer stopper portion 42b ... Hammer rail portion 42c ... Catcher stopper portion 44 ... Wippen flange 46 ... Center rail 48 ... Back check 5
0 ... Support wire 52 ... Regulating rail 54 ... Regulating bracket 58 ... Pseudo hammer member 58a ... Curl portion 58
b ... Rest portion 59 ... Bracket 60 ... Buffer material 64 ... Catcher member D ... Driver

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Claims (13)

(57) [Claims] 1. A capstan button, which is swingably attached to a keyboard side and whose vertical position of a contact portion with a lower surface of a wippen changes according to the swing, a rotary operation head and a screw portion, The keyboard side screwing portion provided on the front side of the capstan button is screwed with the screw portion, and the tip end of the screw portion penetrates a part of the keyboard and contacts the capstan button. And a screw member, so that when the rotary operation head is rotationally operated, the tip portion of the screw portion swings the capstan button to adjust the vertical position of the contact portion. Capstan adjustment device. 2. The keyboard and the capstan button are integrally molded of plastics, and the keyboard and the capstan button are swingably connected by a hinge portion. A keyboard capstan adjustment device according to item 1. 3. The screwing portion has a shape projecting upward, and the capstan button is swingably connected near the tip of the screwing portion. Capstan adjustment device for the indicated keyboard. 4. The screw member is tilted toward the front side of the keyboard and screwed into the screwing portion, so that a rotary operation tool is inserted from a space above the keyboard to rotate the screw member. The keyboard capstan adjustment device according to any one of claims 1 to 3, wherein the screw member can be rotated by engaging with a head portion. 5. The rotary operation work from the space above the keyboard.
Insert the straight rod-shaped screwdriver, which is a tool, into the screw member.
The screw member is rotated by engaging the rotation operation head of
The capstan adjustment device for a keyboard according to claim 4, wherein the capstan adjustment device is capable of being adjusted. 6. A front keyboard portion which swings about the shaft supporting portion when a key pressing operation is applied to the key operating portion, with one end side serving as a key operating portion and the other end serving as a shaft supporting portion, and one end. The side is located below the front keyboard, the other end projects rearward from the pivotal support of the front keyboard, and can swing between both ends on an axis substantially parallel to the swing axis of the front keyboard. And an action lever that lifts the other end when pressed from above by the front keyboard portion at one end side, and an action that interlocks with the action lever, and the action lever is used as a part of the keyboard. A keyboard device comprising a capstan adjusting device for a keyboard according to any one of claims 1 to 5, provided on a rear end side of the action lever. 7. The keyboard device according to claim 6, wherein the action is a pseudo action that interlocks with the action lever and simulates an action of an acoustic piano. 8. The wippen, wherein the dummy action swings while being pushed up by a contact portion of the capstan button as the action lever swings by a key depression operation on the front keyboard portion, and the wippen. A jack that is swingably supported by the wippen and swings while rising as the wippen swings; and while the jack is rising to a predetermined position, the jack is pushed up and swings to move the jack to a predetermined position. After rising, the bat is moved away from the jack for inertial movement, a pseudo hammer portion provided on the bat, and a hammer stopper for abutting the pseudo hammer portion for inertial movement to prevent the movement of the bat. The keyboard device according to claim 7, further comprising: 9. The keyboard device according to claim 8, wherein the jack is made of plastics. 10. The contact portion of the capstan button for transmitting a key pressing operation to the action side is arranged below the upper surface position of the front keyboard portion. Any one of the keyboard devices. 11. A contact portion of the capstan button for transmitting a key depression operation to the action side is arranged below a swing shaft position of the front keyboard portion. 9. The keyboard device according to any one of 9. 12. The keyboard device according to claim 6, wherein the front keyboard portion is made of plastics. 13. A sensor for detecting swing of the action lever by a key pressing operation is provided below one end side of the action lever pressed from above by the front side keyboard portion. The keyboard device according to any one of 1 to 12.