JP3188197B2 - Electronic musical instrument 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 device for an electronic musical instrument having a pseudo action mechanism composed of a whippen, a jack, a hammer and the like.

[0002]

2. Description of the Related Art Conventionally, as a keyboard device of an electronic musical instrument, a device in which a hammer is provided on a wooden keyboard and a device in which a hammer is provided on a plastic keyboard are known. In these devices, the keyboard directly swings the hammer. Therefore, there is a problem that the let-off effect cannot be obtained and the touch feeling of the acoustic piano cannot be realized.

In order to realize the touch feeling of an acoustic stick piano, a keyboard device 601 of an electronic musical instrument provided with a pseudo action mechanism has been developed as shown in FIG. In this keyboard device 601, when the keyboard 614 swings counterclockwise in the figure around the key fulcrum 615 by depressing a key, the whippen 630 is accordingly moved clockwise about a wippen swing shaft 631 provided on the center rail 660. Swinging around, the jack 644 becomes the bat 650 of the hammer 650
Push up a. Then, the hammer 650 starts swinging from the initial position in contact with the hammer pillow 668, and the hammer swing shaft 651 provided on the center rail 660.
Swings clockwise around. Then, after the jack tail 647 abuts on the regulating felt 666, the jack 644 rapidly swings counterclockwise and comes out of the bat 650a, so that the hammer 650 starts inertial movement. This timing is let-off. And the hammer 650 is a hammer stop rail 662.
Collides with the hammer stopper 663 provided at
(Indicated by a dashed line), and then shake back. Thus, the keyboard device 601 realizes a touch feeling equivalent to that of an upright piano.

A button-type sensor 637 is provided below the keyboard 614 of the keyboard device 601. This sensor 637 has two switches inside,
When the key 14 is pressed, one switch is pressed to generate an ON signal, and when the keyboard 614 is further pressed, the other switch is pressed to generate an ON signal. That is,
The sensor 637 detects a point in time when the keyboard 614 has passed each of two positions determined while moving from the initial position to the full stroke position. Then, the control device 605
Based on the signals of the two switches of the sensor 637, the string squeezing sound is generated by obtaining the string striking information, and the sound is stopped by determining the sound stopping information. Specifically, the velocity is determined from the difference between the ON timings of both switches, and the sound intensity is determined.
The sound is stopped by turning off both switches.

[0005]

By the way, the keyboard device 6
01, keyboard 6
14 and the wippen 630 via the cushion C1,
The jack 644 and the bat 650a of the hammer 650 are configured to abut on each other via the cushion C2. Therefore, when the key is pressed at a high speed, the cushions C1 and C2 are elastically deformed and temporarily store a certain amount of force. When the cushion C1 and C2 are restored thereafter, the wippen 630 and the hammer 650 operate, and the piano sound is strongly pronounced. You. In addition, there is a time lag after the key is pressed until the sound is generated. These are characteristics peculiar to acoustic stick pianos.

However, in the configuration in which the button type sensor 637 is pressed with the keyboard 614, when the key is pressed at a high speed,
If one of the cushions C1 and C2 elastically deforms and holds the force between the time when one switch inside the sensor 637 is turned on and the time when the other switch is turned on, it acts as a resistance force. The difference in timing increases, and the detected velocity (corresponding to the moving speed of the keyboard) decreases. For this reason, the generated electronic sound is also a sound corresponding to the electronic sound, and there is a disadvantage that a strong sound is not produced as much as a normal acoustic piano. Further, there is no occurrence of a time lag unlike the acoustic piano after the key is pressed and before it is pronounced. In other words, the keyboard device 601 cannot faithfully reproduce the above-described characteristic of the acoustic piano.

Therefore, there has been a demand for the development of a keyboard instrument for an electronic piano that can reproduce such a characteristic characteristic of an acoustic piano. As a proposal of such a keyboard device, it is conceivable to control generation of an electronic sound in the keyboard device 601 according to the moving speed of the hammer 650 instead of the moving speed of the keyboard 614. Since the hammer 650 has the largest moment of inertia among the swinging members of the action mechanism, the operation that starts swinging after holding the keyboard 614 to some extent without immediately swinging after the keyboard 614 is depressed is most noticeable. Appears. Therefore, if the electronic sound is generated in accordance with the moving speed of the hammer 650, the above-described characteristic peculiar to the acoustic stick can be reproduced with high fidelity. As an example of a specific configuration, a button-type sensor 63
A configuration in which a sensor similar to 7 is installed so as to be pressed by the hammer 650, and this sensor detects the hammer 650 at two positions from the rest position of the hammer 650 to the pseudo string striking position.

By the way, in the keyboard device 601, when the keyboard 614 is pressed from the rest position to the full stroke position, as in a normal acoustic stick piano, the hammer 650 is pressed.
Is let-off halfway from a rest position (shown by a solid line in FIG. 6), swings to a pseudo string striking position (shown by a two-dot chain line in FIG. 6), then swings back, and releases the key when swinging back. If not, the catcher 654 is supported at the back stop position (indicated by a dotted line in FIG. 6) by the back check 643, and is supported at the rest position by the hammer rail 668 if the key is released.

Therefore, when controlling the generation of an electronic sound in accordance with the moving speed of the hammer 650, it is necessary to switch the sensor on and off accurately between the back stop position and the stationary position in order to accurately detect the sound stop information. There is
Since both positions are close to each other, it is technically difficult to accurately switch the sensor on and off. For this reason, for example, it is necessary to separately provide a switch that is turned on and off by the keyboard, and to obtain sound-stop information using this switch. This causes a problem that the cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a keyboard device for an electronic musical instrument that can faithfully reproduce the characteristics peculiar to an acoustic stick and can be manufactured at low cost.

[0011]

Means for Solving the Problems and Effects of the Invention In order to solve the above-mentioned problems, the present invention provides a whippen that swings with a swing of a keyboard, and is swingably supported by the whippen,
A jack that swings and moves in accordance with the swing of the wippen, and whose movement is regulated during the movement, and a swing is started by the swing and movement of the jack, whereby the jack is regulated. A keyboard device for an electronic musical instrument, comprising: a hammer that performs inertial movement away from the jack and reaches a pseudo string position; and information detection means that detects information based on performance information in response to the swing of the wippen. So,
The wippen has a larger moment of inertia than the jack and the hammer.

Such a keyboard device can be applied to an electronic keyboard instrument provided with a pseudo action mechanism that does not actually play a string but matches the touch feeling with an acoustic piano. Here, the pseudo action mechanism refers to, for example, a mechanism having a hammer stopper for preventing the operation of a hammer instead of a string among the action mechanisms. The keyboard device of the present invention can be applied to a keyboard musical instrument having both a string and a hammer stopper, and having a configuration in which a hammer collides with which of the two as appropriate.

In such a keyboard device, when the keyboard swings due to the key being pressed, the wippen swings accordingly, and the jack swingably supported by the whippen moves upward with the swing of the wippen. Rocks while swinging. The jack swings while moving upward so as to push up the hammer, so that the hammer starts swinging. The operation of the jack is regulated so as to be separated from the hammer during the operation. For this reason, the hammer performs inertial motion independently of the jack. This timing is the let-off timing. After that, the hammer moves to the pseudo string striking position while performing inertial motion. The pseudo string striking position refers to, for example, the position of the hammer when it collides with a hammer stopper provided in place of the string.

In such a keyboard device, when the keyboard is depressed from a rest position to a full stroke position, the wippen moves from a position corresponding to the rest position of the keyboard (hereinafter referred to as "Wippen initial position") to a full stroke position of the keyboard. Swinging to a position (hereinafter referred to as a whippen swinging position). Then, the information detecting means detects the information that is the basis of the performance information in accordance with the swing of the wippen.

The information detecting means determines, for example, a first position and a second position between the wippen initial position and the wippen swing position, detects the timing when the wippen reaches the first position, and determines whether the wippen reaches the first position. You may comprise so that the timing which reached two positions may be detected. In this case, both timings correspond to information on which performance information is based. For example, the velocity representing one of the pieces of performance information, ie, the sound intensity, is obtained based on the difference between the timing when the wippen reaches the first position and the timing when the whippen reaches the second position. In addition, the stop sound information, which is also one of the performance information, is obtained based on the timing when the whippen reaches the first position again. As described above, since the information detecting means is configured to detect the timing at which the wippen reaches the first and second positions, the information detecting means has a simple configuration.

In the present invention, the wippen has a larger moment of inertia than the jack or the hammer. For this reason, when the key is pressed at a high speed, the whippen does not immediately swing with the swing of the keyboard, but rather holds up to some extent and then starts swinging, which is more remarkable than the jack or hammer. Further, since the jack and the hammer have a smaller moment of inertia than the wippen, the whippen starts swinging quickly when swinging. For this reason, in the present invention, the characteristic peculiar to the normal acoustic stick described in detail in the section of [Problems to be Solved by the Invention], that is, the key press touch when the key is pressed at a high speed and the electronic generated by the key touch The relationship with the loudness of the sound and the time lag from when the key is pressed until when the sound is generated are realized by wippen.

Therefore, if the information which is the basis of the performance information is detected in accordance with the operation of the wippen, it is possible to obtain the performance information which faithfully reproduces the above-mentioned characteristic peculiar to the ordinary acoustic piano. Therefore, if the player plays the keyboard device of the present invention with the same feeling as the acoustic piano, the sound is generated in the same manner as the acoustic piano, and the player does not feel uncomfortable.

Further, since the wippen corresponds to the operation of the keyboard on a one-to-one basis, the sound stopping information, which is one of the performance information, can be accurately obtained based on the information detected by the information detecting means. In this regard, for example, when information serving as the basis of performance information is detected in accordance with the operation of a hammer, it is difficult to accurately obtain sound stop information because the hammer does not correspond one-to-one with keyboard operation. For this reason, it is necessary to provide a separate detecting means on the keyboard or the like and obtain the sound-stopping information based on the information obtained by the detecting means, and there is a problem that the cost increases accordingly. Since no means is required, the cost is not increased.

In the keyboard device of the present invention, the whippen preferably has a larger swing radius than a jack or hammer from the viewpoint of increasing the moment of inertia. It is also preferable to add a weight to the end of the wippen in order to increase the moment of inertia.

Further, in the keyboard device of the present invention, it is preferable that the keyboard and the wippen are configured to be in contact with each other via a cushioning material, as in a normal acoustic stick piano. The wippen can be elastically deformed to a greater or lesser degree, whether made of wood or synthetic resin, so when the keyboard swings at a high speed, the wippen itself can store the force as described above, but between the keyboard and whippen When the cushioning material is interposed in the whippen, the cushioning material is also elastically deformed in addition to the elastic deformation of the wippen itself, so that the force transmitted from the keyboard to the wippen is more easily stored. In this case, since the characteristic peculiar to the acoustic piano appears more conspicuously, the present invention employs a configuration in which the moment of inertia of the wippen is maximized and information based on the performance information is detected according to the operation of the whippen. High value.

The keyboard in the key released state is given a force such that the front end of the keyboard swings upward by a wippen receiving a weight such as a hammer. Thus, the keyboard is held at the stationary position. In this regard, it is preferable that the moment of inertia of the wippen be higher than the moment of inertia of the keyboard, in consideration of maintaining the keyboard in the rest position in the present invention. In this case, even if the jack or whippen is reduced in weight and size and the moment of inertia becomes extremely small, the keyboard can be favorably held at the stationary position.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment of the present invention
It is needless to say that the present invention is not limited to the following embodiments, and can take various forms within the technical scope of the present invention.

[First Embodiment] FIG. 1 is a sectional view of the keyboard device of the first embodiment in a key released state, FIG. 2 is a sectional view of the same keyboard device in a pseudo string striking state, and FIG. FIG. 2 is a partially enlarged view of FIG. Although FIGS. 1 and 2 illustrate the case of a white key, the black key is the same as the white key except that the keyboard structure is different.

The keyboard device 1 is used for an electronic keyboard instrument, and mainly includes a chassis 11, ribs 19, a keyboard 1
4, wippen 30, center rail 60, hammer 5
0 and so on. The chassis 11 includes a flat portion 12 located at a position higher than the upper surface of the shelf 2 and legs 13 fixed as separate components to the front end of the flat portion 12. The plane portion 12 is arranged in the direction in which the keyboard 14 is arranged (the direction perpendicular to the plane of FIG.
In the left-right direction, the same applies hereinafter). A bearing 16 for supporting the key fulcrum 15 is provided on the rear end side of the flat portion 12.
Has been fixed.

The bearing 16 has substantially L-shaped L-shaped legs 18, 18 on its lower surface.
After the bearing 18 is inserted through the holes 17, 17, the bearing 16 is slid in the front direction of the keyboard (to the left in FIGS. 1 and 2) so that a flat surface is formed between the L-shaped leg 18 and the lower surface of the bearing 16. In this state, the front end of a flange portion 61 of a center rail 60 described later abuts on the rear end of one L-shaped leg 18 (rear side, that is, the right L-shaped leg 18 in FIG. 1). In this state, the bearing 16 is fixed to the flat portion 12 of the chassis 11 so as not to slide. The bearing 16 is mounted on the chassis 11 in a state of being accurately positioned.

An opening 25 through which the front end of the wippen 30 is inserted vertically is provided in the flat portion 12 for each keyboard. Further, the rear end of the flat portion 12 is a free end having a shape slightly bent upward.
An open space 39 is provided between the rear end 2 and the shelf 2.

The leg 13 of the chassis 11 is a substantially U-shaped member extending in the direction in which the keyboards 14 are arranged. The leg 13 is screwed to the plane portion 12 at an upper flange portion 13a, and is screwed to a lower flange portion 13b. It is screwed to the shelf 2. Therefore, the height of the front end of the flat portion 12 is regulated by the legs 13.

The rib 19 is a plate-like member extending in the front-rear direction of the keyboard 14, and is screwed to the leg 13 of the chassis 11 at a front flange portion 20, and to the flat portion 12 of the chassis 11 at three places. Upper flange portions 21a, 21 provided
b, 21c, and is screwed to the shelf 2 at the lower flange portion 22.

The height of the rear end of the flat portion 12 (ie, the vicinity of the key fulcrum 15) is regulated by an upper flange portion 21c of the rib 19 and a lower flange portion 22 provided at a position facing the upper flange portion 21c. ing. The ribs 19 are formed by pressing a metal plate material with a die by pressing, and are also bent in the die to form the flange portions 20 to 22. For this reason, the cost of manufacturing the rib 19 can be kept low, and the accuracy of the rib 19 depends on the accuracy of the mold, but since the size of the mold is small, high accuracy can be obtained. That is, the height of the rear end of the flat portion 12 is regulated with sufficient accuracy.

The keyboard 14 (white key in this case) is formed of synthetic resin in a hollow shape in which reinforcing ribs are arranged in some places, and is attached to a key fulcrum 15 at its rear end so as to be swingable.
Therefore, the front end of the keyboard 14 can swing up and down about the key fulcrum 15. At the front end of the keyboard 14, a hook-like arm 24 projects downward. The hook-shaped arm 24 has a shape in which the hook portion 24 a is bent toward the key fulcrum 15.

When the keyboard 14 is not depressed, as shown in FIG. 1, the hook portion 24a of the hook-shaped arm 24 is a long felt 2 provided on the lower surface of the front end of the flat portion 12 of the chassis 11.
6b. When the keyboard 14 is depressed, as shown in FIG. 2, the lower surface of the front end of the keyboard 14 has a long felt 26 provided on the upper surface of the front end of the flat portion 12 of the chassis 11.
a. Further, a keyboard guide portion 27 formed upward at the front end of the plane portion of the chassis 11 is inserted into a hollow portion on the front end side of the keyboard 14, and the keyboard guide portion 27 of the keyboard 14 at the time of a key pressing operation. It serves to guide the front end so that it does not swing right and left.

Below the keyboard 14, a whippen swing shaft 31 of a whippen 30 is swingably supported by a substantially U-shaped bearing member 33. The bearing member 33 is provided with a bearing member fixing plate 34 so as to cover the wippen swing shaft 31 from above, and the bearing member fixing plate 34 and the bearing member 33 are cantilevered to the chassis 11 by the same screws. ing. The whippen swing shaft 31 is prevented from coming off the bearing member 33 by the bearing member fixing plate 34.
The bearing member 33 is mounted on the chassis 11 in a state where it is accurately positioned.

The front end of the wippen 30 can move between above and below the chassis 11 through the opening 25 of the chassis 11 when the wippen 30 swings around the whippen swing shaft 31. Are located. A sliding tape 32 (the cushioning material of the present invention) having a small surface frictional resistance is provided on the upper surface of the front end of the wippen 30, and the sliding tape 32 is provided so as to protrude behind the keyboard 14. It is in contact with the tip of the actuator 35.
Incidentally, the sliding tape 32 is composed of two layers (the latter is a surface layer) of urethane foam for relaxing the impact and artificial leather for facilitating sliding.

Below the front end of the wippen 30, a substrate 28 extending in the direction in which the keyboards are arranged is provided with a flat portion 12 of the chassis 11.
And is attached to the chassis 11 at a predetermined interval. On this board 28, each wippen 30 of a total of 88 keys is provided.
A key press detection sensor 37 is provided at a position corresponding to. As shown in FIG. 3, the key press detection sensor 37 has
Two switches S1 and S2 are provided. When the keyboard 14 at the initial position is depressed and the front end of the wippen 30 is depressed by the actuator 35, one switch S1 is first turned on, and when the keyboard 14 is further depressed, the other switch S2 is turned on, and the keyboard is turned on. 14 reaches the full stroke position. The position of the wippen 30 when the switch S1 is turned on is the first position of the present invention, and the switch S2
The position of the wippen 30 when is turned on is the second position of the present invention.
Position. A key press / key release timing and a velocity can be obtained from the ON / OFF timing of the two switches S1 and S2 and the difference between the ON / OFF timings. At the timing corresponding to the key depression, the performance sound is output at the pitch corresponding to the keyboard and the strength corresponding to the velocity, and the sound can be stopped at the key release timing. The key detection sensor 37 is accurately positioned on the substrate 28 in consideration of the positional relationship with the keyboard 14.

At the rear end of the wippen 30, a bearing 42 for supporting the jack rotating shaft 45 and a back check 43 for receiving the hammer 50 swinging back are integrally provided with high precision. The wippen 30 is provided with a weight 41 at its rear end so that the moment of inertia is larger than that of the jack 44 or the hammer 50, and the swing radius of the wippen 30 (that is, the whippen swing shaft 31).
From the jack 44 and the hammer 50). Here, in the present embodiment, in order to increase the swing radius of the wippen 30, the wippen 3
0 passes through an open space 39 between the rear end of the flat portion 12 of the chassis 11 and the
It is formed so as to reach further rearward than the rear end.

The jack 44 is substantially L-shaped, and the jack rotating shaft 45 is provided at the bent portion of the L-shape. Also,
The jack tail 47 is connected to the wippen 30 by a compression coil spring 46. The center rail 60 is formed so as to extend in the direction in which the keyboards are arranged, and has a standing portion 62 that rises substantially perpendicular to the plane portion 12 of the chassis 11, and is bent from below the standing portion 62 toward the front of the keyboard 14. And a stop rail portion 63 extending obliquely upward and rearward from above the standing portion 62. The center rail 60 is screwed to the flange portion 61 while being accurately positioned on the flat portion 12 of the chassis 11. The front end of the flange portion 61 of the center rail 60 has an L-shaped leg 18 on the rear side of the bearing 16 for supporting the key fulcrum 15 described above.
It is fixed in a state of contact with the L-shaped leg 18 so as not to slide inside.

At the standing portion 62 of the center rail 60,
A rail 67 having a substantially 断面 -shaped cross section extending in the direction in which the keyboards are arranged is screwed, and has a hammer 50 on its upper surface in a key released state.
A hammer pillow 68 that is in contact with the rest 52 of the
The lower surface is provided with a regulating felt 66 to which the jack tail 47 can abut. A stop felt 63a is provided on the lower surface of the stop rail 63 so as to extend in the direction in which the keyboards are arranged. As described above, since both the hammer pillow 68 and the regulating felt 66 are provided on the rail 67, the cost is reduced as compared with the case where each is provided on a separate rail. In addition, this rail 6
7. The regulating felt 66 and the hammer pillow 68 are all accurately positioned.

Further, the center rail 60 is provided with an action rib 70 for reinforcement. The action rib 70 is screwed at a standing portion 62 of the center rail 60 and two places, and at a flange portion 61 of the center rail 60 and one place.

The hammer 50 is swingably supported by a substantially U-shaped bearing member 65 in which a hammer swing shaft 51 provided at a front end thereof is fitted into a square hole of a standing portion 62 of the center rail 60. The bearing member 65 is provided with a bearing member fixing plate 71 so as to cover the hammer swing shaft 51. The bearing member fixing plate 71 and the bearing member 65 are cantilevered to the center rail 60 by the same screw. I have.
The bearing member fixing plate 71 prevents the hammer swing shaft 51 from coming off the bearing member 65. The bearing member 65 is attached to the center rail 60 in a state where it is accurately positioned.

The lower surface of the hammer 50 has a rest portion 52 that can be brought into contact with the hammer pillow 68, a butt portion 53 formed in a substantially S-shape so that the tip of the jack comes into contact with and separates from the hammer pillow 68, A catcher portion 54 that can be brought into contact with the check 43 is provided. From the rest portion 52 to the catcher portion 54 through the bat portion 53, the cushion material is composed of two layers of urethane foam and artificial leather (the latter is a surface layer). Reference numeral 56 denotes a series. In the cushion material 56, the position where the tip of the jack 44 abuts in a state where the key is not pressed is set to the position of the jack 44 after the key is released.
A cushioning material 57 is applied to suppress a collision sound when the hammer 50 comes into contact with the cushion material 56 in an attempt to return to the original position by the action of the compression coil spring 46.

Of the upper surface of the hammer 50, the hammer 50
When the rocker swings counterclockwise in FIG. 1 about the hammer swing shaft 51, the collision sound generated when the hammer 50 collides with the stop felt 63 a is provided at the position where the collision collides with the stop felt 63 a provided on the center rail 60. A pseudo string striking portion 58 to which a cushioning material for suppressing the vibration is applied is provided.

The rear end of the hammer 50 has a weight 5 in consideration of the center of gravity of the hammer in the action mechanism of the acoustic stick, the operation of the hammer when it swings back, and the like.
Although 9 is provided, the moment of inertia of the hammer 50 is set to be smaller than that of the wippen 30.

The wippen 30, the jack 44, and the hammer 50 are all made of synthetic resin, and do not cause distortion for a long time. In the keyboard device 1 configured as described above, in a state where the key is not pressed, as shown in FIG. 1, a clockwise force moment acts on the front end of the wippen 30 by the weight 41 of the wippen 30 and the like. Since this is applied to the actuator 35, the front end of the keyboard 14 tends to swing upward. However, since the hook portion 24a of the hook-shaped arm 24 abuts on the long felt 26b, the swing is prevented. Stopped at.

When the player depresses the keyboard 14, the keyboard 1
4 swings counterclockwise in FIG. 1 around the key fulcrum 15. As a result, the front end of the wippen 30 is pushed down by the actuator 35, so that the wippen 3
Numeral 0 swings counterclockwise around the wippen swing shaft 31, the lower surface of the front end pushes down the key press detection sensor 37, and the rear end swings upward. Then, the jack 44 moves the butt 53 of the hammer 50 with the swing of the wippen 30.
And swings counterclockwise with respect to the wippen 30. Thereafter, when the jack tail 47 of the jack 44 hits the regulating felt 66, the jack 44 rapidly swings counterclockwise around the contact point between the jack tail 47 and the regulating felt 66, and the tip of the jack 44 is a hammer 50. From the butt portion 53 of the horn. The operation in which the tip of the jack 44 comes out of the butt portion 53 is let-off. Therefore, this pseudo action can cause a let-off like a normal action.

After let-off, the hammer 50 continues to swing counterclockwise due to inertial motion. Thereafter, the pseudo string striking portion 58 of the hammer 50 performing the inertial motion collides with the stop felt 63a. The state at this time is shown in FIG. As a result, the hammer 50 is prevented from inertial movement.
Thereafter, the hammer 50 swings back in the opposite direction, ie, clockwise.

When the hammer 50 swings back, the keyboard 14
If the player's finger is away from the, the rest 52 of the hammer 50 abuts on the hammer pillow 68 and stops at that state, that is, in the initial position (see FIG. 1). On the other hand, if the keyboard 14 is kept depressed when the hammer 50 swings back, the catcher portion 54 of the hammer 50 is provided at the rear end of the wippen 30 before the rest portion 52 of the hammer 50 contacts the hammer pillow 68. It is received at the back stop position (see the dotted line in FIG. 2) by the back check 43.

Therefore, the function of the pseudo action of this embodiment performs the same function as the action of the acoustic piano except that the hammer 50 does not hit a string. For this reason, the touch feeling that the player receives from the keyboard 14 is almost the same as that of an acoustic piano.

Here, an operation when the player depresses the keyboard 14 at a high speed, which is one of the features of the present invention, will be described. When the key is pressed at a high speed, the keyboard 14 swings around its key fulcrum 15 counterclockwise in FIG. As a result, the sliding tape 32 of the wippen 30 is pressed by the actuator 35. However, since the wippen 30 has a large moment of inertia, the sliding tape 32 is elastically deformed and the wippen 30 itself is slightly deformed, and the pressing force by the actuator 35 is reduced. It is stored. For this reason Wippen 3
0 does not start rocking immediately.

Thereafter, the wippen 30 starts swinging vigorously due to the restoring force of the deformation of the sliding tape 32 and the wippen 30 in addition to the pressing force of the actuator 35. Along with this, the jack 44 having a smaller moment of inertia than the wippen 30 immediately swings while pushing up the hammer 50, and with the operation of the jack 44, the hammer 50 having a smaller moment of inertia than the wippen 30 immediately starts swinging. It is let off and reaches the pseudo string position. Therefore, [Problems to be solved by the invention]
As described above, the characteristic peculiar to the ordinary acoustic piano, that is, the relationship between the key press touch when the key is pressed at a high speed and the loudness of the electronic sound generated by the key press, and the sound is generated after the key is pressed The time lag until is realized by the wippen 30 in this embodiment.

The key depression detection sensor 37 remains in the initial state (both the switches S1 and S2 are off) until the wippen 30 starts swinging, and the wippen 30 starts swinging vigorously and the whippen 30 starts to swing. When the first position is reached, one switch S1 is turned on, and then when the second position is reached, the other switch S2 is turned on. If the key is depressed after the hammer 50 has been swung back, the whippen 30 is at the position shown in FIG. 2 (the wippen swing position), so that both the switches S1 and S2 are on and the key is released. If the whippen 30 is at the position shown in FIG. 1 (the whippen initial position), both switches S1 and S2 are turned off.

According to the keyboard device of this embodiment described in detail above, the following effects can be obtained. The key press detection sensor 37 detects the on / off timing of the switches S1 and S2, which are the basis of the performance information, according to the operation of the wippen 30 which realizes the characteristic peculiar to the acoustic stick piano. Then, an electronic control circuit (not shown) creates performance information such as velocity (that is, sound intensity) based on the on / off timing, and controls so that a performance sound corresponding to the performance information is output from the electronic sound source. For this reason, according to the present embodiment, the relationship between the key press touch when the key is pressed at a high speed and the loudness of the electronic sound generated by the key press and the time lag from the key press to the sound generation are as follows.
This is a faithful reproduction of a normal acoustic stick piano.

When the keyboard 14 is depressed from the rest position (see FIG. 1) to the full stroke position (see FIG. 2), the wippen 30 moves from the whippen initial position (see FIG. 1) corresponding to the rest position of the keyboard 14 to the keyboard. 14 to a whippen swinging position (see FIG. 2) corresponding to the full stroke position. For this reason, the wippen 30 corresponds to the operation of the keyboard 14 on a one-to-one basis. The key press detection sensor 37 is
It detects that the wippen 30 has passed the first position and the second position defined between the wippen initial position and the wippen swing position. The electronic control circuit (not shown)
Wippen 30 that corresponds to the operation of the keyboard 14 on a one-to-one basis
Based on the on / off timing of the key press detection sensor 37 for detecting the operation of the key, the sound stop information which is one of the performance information is created, and the performance sound is stopped. Thus, based on the information detected by the key press detection sensor 37, not only the velocity but also the sound stop information can be accurately obtained. For this reason, it is not necessary to separately provide a sensor for obtaining velocity and a sensor for obtaining sound stop information, and the cost is reduced accordingly.

[Second Embodiment] FIG. 4 is a cross-sectional view of a keyboard device according to a second embodiment (solid lines indicate a key released state, and dashed lines indicate a pseudo string striking state). It is the elements on larger scale of FIG. 4 and 5 illustrate the case of the white key, the black key is the same as the white key except that the keyboard structure is different.

In the keyboard device of this embodiment, the chassis is composed of three members, a chassis front member 111, a chassis middle member 112, and a chassis rear member 113.
1 to 113 are respectively supported at predetermined heights by ribs 119 provided on the upper surface of the shelf 2. The rib 119 is formed in a shape extending in the front-rear direction (left-right direction in FIG. 4, the same applies hereinafter) of the keyboard. The chassis front member 111 is provided with a cushion 124 which can be brought into contact with the lower surface of the front end of the wooden keyboard 114, and a keyboard guide 127 which is inserted into a hollow portion on the front end side of the keyboard 114. The balance pin 115 of the keyboard 114 is attached to the middle member 112 of the chassis.
(Key fulcrum) is erected, and the keyboard 114 can swing about the balance pin 115. Chassis rear member 113
The cushion 1 which can be brought into contact with the lower surface of the rear end of the keyboard 114
26 are provided.

At the rear end of the rib 119, a vertical rail 116 extending substantially in the direction perpendicular to the shelf board 2 and in the direction in which the keyboards are arranged (the direction perpendicular to the plane of FIG. 4; the same applies hereinafter) is screwed. A center rail 160 is connected and fixed to the vertical rail 116 via a connecting rib 117 by a screw.

The vertical rail 116 has a wippen 130
The wippen swing shaft 131 is swingably supported by a substantially U-shaped bearing member 133 fitted in a square hole provided in the vertical rail 116. The bearing member 133 has a bearing member fixing plate 134 so as to cover the wippen swing shaft 131.
The bearing member fixing plate 134 and the bearing member 1
33 is screwed to the vertical rail 116 in a cantilever manner by the same screw. The bearing member fixing plate 134 prevents the whippen swing shaft 131 from coming off the bearing member 133. Note that the bearing member 133 is a vertical rail 1
16 is mounted in a state where it is accurately positioned. Also, on the lower surface of the rear end of the wippen 130, the keyboard 11
4 are provided with two capstan buttons 132 that come into contact with the cushion 138 (the cushioning material of the present invention) on the upper surface of the rear end.

Behind the keyboard 114, a vertical rail 116 is provided.
The substrate 128 is disposed so as to be substantially parallel to the above. A key press detection sensor 137 is provided on the substrate 128 at a position corresponding to the pressing portion 135 of the wippen 130.
The key press detection sensor 137 has substantially the same function as the key press detection sensor 37 of the first embodiment, and is accurately positioned on the substrate 128 in consideration of the positional relationship with the keyboard 114 and the wippen 130. I have.

At the front end of the wippen 130, a weight 141 for balance is provided, and a jack rotating shaft 45 of the jack 44 (the same as in the first embodiment) is supported. A back check 143 for receiving (the same as in the first embodiment) is provided integrally with high accuracy. The jack tail 47 of the jack 44 is connected to the wippen 130 by a compression coil spring 46 (see FIG. 4) as in the first embodiment.

The wippen 130 is provided with a weight 141 at its rear end so that the moment of inertia is larger than that of the jack 44 or the hammer 50.
The swing radius of 30 (that is, the length from the whippen swing shaft 131 to the weight 141) is changed to the jack 44 or the hammer 50.
Longer.

The center rail 160 fixed to the connecting rib 117 is formed so as to be substantially perpendicular to the shelf board 2 and to extend in the direction in which the keyboards are arranged. This center rail 16
0 has a stop rail portion 163 extending diagonally upward and forward from above, and a stop felt 163 on its lower surface.
a is provided.

As shown in FIG. 5, the center rail 160
A rail 67 having a substantially Γ cross section similar to that of the first embodiment is screwed below the hammer swing shaft 51. The rail 67 has a hammer pillow 68 on the upper surface and a regulating felt 66 on the lower surface, as in the first embodiment. Further, the hammer 50 has the same configuration as that of the first embodiment, and the hammer swing shaft 51 is swingably supported by the center rail 160 as in the first embodiment. still,
The same reference numerals as in the first embodiment denote the respective components of the hammer 50, and a description thereof will be omitted.

In the keyboard device of the present embodiment constructed as described above, when the key is not depressed, as shown in FIG. 4, the front end of the wippen 130 is counterclockwise in FIG. Since the moment of the peripheral force acts on the rear end of the keyboard 114, the front end of the keyboard 114 tries to swing upward, but the lower end of the rear end of the keyboard 114 comes into contact with the cushion 126. Stopped in a state where swing was prevented.

When the player depresses the keyboard 114, the keyboard 114 swings counterclockwise in FIG. 4 around a balance pin 115 provided substantially at the center of the keyboard 114. As a result, the wippen 130 is moved to the capstan button 13.
2 and swings clockwise around the wippen swing shaft 131, the pressing portion 135 pushes down the key press detection sensor 137, and the front end of the wippen 130 swings upward. Then, the jack 44 swings clockwise with respect to the wippen 130 while rising so as to push up the butt portion 53 of the hammer 50 with the swing of the whippen 130. Subsequent operations are the same as in the first embodiment (however, the directions of rotation of the jack and hammer in FIG. 4 are opposite to those in FIGS. 1 and 2 showing the first embodiment).
The description is omitted.

Here, an operation when the player presses down the keyboard 114 at a high speed, which is one of the features of the present invention, will be described. When the key is pressed at a high speed, the keyboard 114 swings counterclockwise in FIG. As a result, the capstan button 132 of the wippen 130 is pressed by the cushion 138 of the keyboard 114. However, since the wippen 130 has a large moment of inertia, the cushion 138 is elastically deformed, and the wippen 130 itself is slightly deformed to store the pressing force. Therefore, whippen 130 does not immediately start swinging. Thereafter, the wippen 130 starts swinging vigorously due to the restoring force of the deformation of the cushion 138 and the wippen 130 itself in addition to the force for pushing up the capstan button 132 of the wippen 130. Along with this, the jack 4 having a smaller moment of inertia than the wippen 130
4 immediately swings while pushing up the hammer 50, and with the operation of the jack 44, the hammer 50 having a smaller moment of inertia than the wippen 130 immediately starts swinging,
After that, it is let off and reaches the pseudo string position. For this reason,
As described in the section of [Problems to be Solved by the Invention], the characteristic peculiar to the ordinary acoustic piano, that is, the key touch when the key is pressed at a high speed and the magnitude of the electronic sound generated thereby. In this embodiment, the relationship and the time lag from when the key is pressed until when the sound is generated are realized by the wippen 130.

The key press detection sensor 137 is a wippen 130
Remains in the initial state (both switches are off) until the wobble 130 starts swinging. After the wippen 130 starts swinging vigorously, the two switches are sequentially turned on. And
After the hammer 50 swings back, both switches are on if the key is depressed, and both switches are off if the key is released, so that accurate sound stop based on the on / off timing of both switches Information can be obtained.

According to the keyboard device of this embodiment described in detail above, the effects of the first embodiment can be obtained. [Other Embodiments] The wippens 30 and 1 of each of the above embodiments are shown.
30 may also be designed to have a greater moment of inertia than the keys 14,114. The keys 14 and 114 in the key released state are applied with a force such that the front ends of the keys 14 and 114 are swung upward by the wippens 30 and 130 receiving the weight of the hammer 50 and the like, and are thereby held in the stationary position. . At this time, wippen 30, 1
If the moment of inertia of the keyboard 30 is larger than that of the keyboards 14 and 114, even if the jack 44 and the hammer 50 are reduced in weight and size and the moment of inertia is extremely small, the keyboards 14 and 114 can be kept in the stationary position using only the wippen 30 and 130. Can be held.

Further, the key press detection sensor 37 of the above embodiment
Although the contact type button switch 137 is used, a contact type leaf switch or a non-contact type optical switch may be used. Here, the leaf switch is provided with one spring-plate-shaped movable contact between two opposed fixed contacts, and the movable contact normally contacts one fixed contact (used as the first switch S1). , A switch that contacts the other fixed contact (used as the second switch S2) by an external force, and contacts the other fixed contact again when the external force is removed. An optical switch is provided with a light emitting element (for example, an infrared light emitting diode) on one of two opposing surfaces and two pairs of light receiving elements (for example, phototransistors) on the other, and forms an optical path between each light emitting element and light receiving element. A photo interrupter that detects the interruption / conduction of the optical path. The optical path is cut off and conducted by a stepped shutter provided on the keyboard.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view when a keyboard device of a first embodiment is in a key release state.

FIG. 2 is a cross-sectional view when the keyboard device of the first embodiment is in a pseudo string striking state.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a sectional view of a keyboard device of a second embodiment.

FIG. 5 is a partially enlarged view of FIG. 4;

FIG. 6 is a sectional view of a conventional keyboard device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Keyboard device, 2 ... Shelf board, 8 ... Screw, 9
..Screw holes, 11: chassis, 14: keyboard, 1
5 ... key fulcrum, 16 ... bearing, 17 ... insertion port,
18 L-shaped leg, 19 rib, 24 hook-shaped arm, 28 board, 30 whippen, 31
..Wippen swing shafts, 32 ... sliding tapes, 35
..Actuator, 37... Key press detection sensor, 44
... Jack, 45 ... Jack rotation axis, 47 ...
・ Jack tail, 50 ・ ・ ・ Hammer, 51 ・ ・ ・ Hammer swing shaft, 58 ・ ・ ・ Pseudo stringing part, 60 ・ ・ ・ Center rail, 63 ・ ・ ・ Stop rail part, 63a ・ ・
・ Stop felt, 65 ・ ・ ・ Bearing member, 66 ・ ・ ・
Regulating felt, 67 ... rail, 68 ...
・ Hammer pillow.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-49166 (JP, A) JP-A-2-256094 (JP, A) JP-A-7-261761 (JP, A) JP-A 8- 160954 (JP, A) JP-A-8-179969 (JP, A) JP-A-4-3033891 (JP, A) JP-A-8-328546 (JP, A) JP-A-4-372992 (JP, A) Japanese Utility Model Hei 6-47991 (JP, U) Japanese Utility Model Hei 4-120999 (JP, U) Japanese Utility Model Hei 4-49675 (JP, Y2) Japanese Utility Model Hei 7-53111 (JP, Y2) (58) (Int.Cl. ⁷ , DB name) G10H 1/34 G10B 3/12 G10C 3/12 G10C 3/16

Claims (4)

(57) [Claims] 1. A whippen that swings with a swing of a keyboard, and is swingably supported by the whippen, swings and moves with the swing of the whippen, and the movement is restricted during the movement. A jack, a swing is started by swinging and moving the jack, and when the operation of the jack is regulated, a hammer that separates from the jack to perform an inertial motion and reaches a pseudo string striking position; and a swing of the whippen. A keyboard device comprising: information detection means for detecting information based on performance information according to movement; wherein the whippen has a larger moment of inertia than the jack and the hammer. Keyboard device. 2. The keyboard device for an electronic musical instrument according to claim 1, wherein the whippen has a swing radius larger than that of the jack and the hammer. 3. The keyboard device for an electronic musical instrument according to claim 1, wherein the keyboard and the whippen are in contact with each other via a buffer material. 4. The whippen moves from a position corresponding to the stationary position of the keyboard to a full stroke position of the keyboard via a first position and a second position when the keyboard is pressed from a stationary position to a full stroke position. Swinging to a corresponding position, wherein the information detecting means detects that the whippen has reached the first position or has reached the second position. A keyboard device for an electronic musical instrument according to claim 1.