JP3509952B2 - 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 used for an electronic keyboard instrument such as an electronic piano.

[0002]

2. Description of the Related Art Conventionally, in an acoustic piano, when a key is pressed with a certain amount of strong force (that is, at a high key pressing speed), the key in the high frequency range is It is known that the touch becomes lighter.

Therefore, for the purpose of reproducing the touch feeling peculiar to the acoustic piano as described above, keyboard devices as shown in the following (1) and (2) have been proposed. (1) As shown in FIG. 5, a hammer arm P9 having a cutout portion P7 is provided, and the cutout portion P7 is cut to change the mass distribution of the hammer arm P9, thereby changing the key touch feeling according to the pitch or range. Keyboard device (see Japanese Utility Model Laid-Open No. 1-103885).

(2) As shown in FIGS. 6A and 6B, a hammer arm P13 for lifting the tip of the key P11 by pressing the key P11 from below is provided, and the key P1 is provided.
The rotation center portion (axis P15) of 1 is arranged along the straight line S,
A keyboard device in which the center of rotation (axis P17) of the hammer arm P13 is arranged along the inclined line Y (JP-A-4-34789).
(See Japanese Patent Publication No. 5). In other words, this keyboard device is arranged such that the rotation center of the hammer arm P13 gradually approaches the rotation center of the key P11 from the low-pitched sound side toward the high-pitched sound side.

[0005]

By the way, in the acoustic piano, when a key is pressed with a certain degree of strength as described above, the touch of the key in the treble range becomes light, but the key is weakly pressed. When a key is pressed (that is, when the key is pressed at a slow speed), the weight of the key touch at the beginning of pressing the key is almost the same for all keys regardless of the pitch or range of the key. That is, the load at the beginning of key depression (this is referred to as initial load) when the key is weakly pressed is almost the same for all keys.

However, in the prior arts (1) and (2) above, no consideration is given to the touch feeling when the key is weakly tapped, and for the key in the bass range,
There is a problem that the key touch at the beginning of key depression becomes heavy when hitting lightly. Therefore, when a key in the low frequency range is played by a pianissimo, there is a problem that the key is heavy and difficult to play.

The present invention has been made in order to solve the above problems, and provides a keyboard device capable of obtaining a key touch feeling extremely similar to that of an acoustic piano in both cases of hard hit and weak hit. The purpose is to provide.

[0008]

A key for an electronic musical instrument according to claim 1.
The panel device includes a plurality of keys that are oscillated and displaced in response to a key pressing operation,
In a keyboard device of an electronic musical instrument, comprising an action simulation member for applying a load simulating an action to a position apart from the swing fulcrum of the key, the swing fulcrum of the key is defined as a length direction of the key.
In the middle of the direction from the swing fulcrum to the front end of the key on the key pressing side
Provided equal position across all the key length of the A
The operation simulation member should be pressed so that the key is pressed from above.
The position where the load of the above action simulation member is applied.
Position and the rocking fulcrum of the above key, the high range is low range.
By making it shorter than the side, the action simulating member raises the moment of trying to lift the tip of the key in the low range.
The weight of the weight member or the weight of the weight member is smaller than that of the key member on the high frequency side, and all of the keys are provided with a weight member that gives a moment in a direction that cancels the moment given to the key by the action simulation member. By adjusting the distance from the member to the swing fulcrum, the balance state of the moment around the swing fulcrum of the key is made substantially the same for all keys.

According to a second aspect of the present invention, in the keyboard device for an electronic musical instrument according to the first aspect, the weight of the weight member is adjusted.
In case of knotting, increase the number of weight members with the same weight.
It is characterized by decreasing .

According to a third aspect of the present invention, in the electronic musical instrument keyboard device according to the first or second aspect, the action simulation is performed.
The member is the same for all keys . A fourth aspect of the present invention, in the electronic musical instrument keyboard apparatus according to any one of claims 1 to 3, treble side
Compared to the bass range, the rocking fulcrum of the key is located at the rear end of the key.
The distance to the action key near the rear end of the key.
The load of the simulation member is applied .

[0011]

According to the invention of claim 1, which has the above-mentioned structure, the moment when the action simulation member tries to lift the tip of the key is made smaller on the high tone range side than on the low tone range side. There is. Therefore, in the key on the low tone range side, the dynamic reaction force applied to the key from the action simulation member is increased because the moment is relatively increased. Therefore, when the key is hit hard, the key on the low tone range has a larger dynamic key pressing load than the high tone range, and the touch feels heavy.

Further, in the invention of claim 1, for example, in the case of a key in the low frequency range, the distance from the weight member to the swing fulcrum is made longer than that in the key in the high frequency range, or the weight of the weight member is increased. Or the combination of both, the sum of the moment given to the key by the action simulation member and the moment given to the key by the weight of the weight member is added to the key in the low range and the key in the high range. And are almost the same. Therefore, when a key is tapped, the key-pressing load (initial load) at the beginning of key-pressing is
It is almost the same across all keys.

That is, according to the first aspect of the present invention, there is an effect that a key touch feeling extremely similar to that of an acoustic piano can be obtained in both cases of a hard hit and a weak hit. Moreover, the action simulation member is
Since it is attached so that the key is pressed from above,
It is not necessary to attach the action simulation member below the key,
There will be enough space under the key. Therefore,
For example, a circuit board or a switch that detects key press / release
Etc. can be easily attached under the key. Well
Also, in the treble range, compared to the bass range , the position where the load is applied by the action simulation member (load point)
However, it is brought closer to the swing fulcrum of the key. Therefore,
For the key in the low range, even if the key is pressed at the same speed (angular velocity) as in the high range, the moment of inertia of the key ( The product of the applied load and the square of the distance from the rocking fulcrum to the load point) increases, and the dynamic reaction force applied from the action simulation member to the key increases accordingly. Therefore, when the key is hit hard, the key on the low tone range has a larger dynamic key pressing load than the high tone range, and the touch feels heavy.

[0014] Then, the load point by the action simulating member only close relative fulcrum, it is possible to lighter than the key touch of the high range side in the key touch bass side, according to claim 3 the action simulated member as provided in the key and (e.g. a hammer arm or the like) can be used the same ones (those with the same weight and size). Therefore, it is not necessary to use a plurality of types of hammer arms or the like having different masses as in the above-mentioned conventional technique (1), and there is an effect that component management and assembly work are facilitated.

Further, in the invention of claim 2 , when changing the weight of the weight member, it is only necessary to change the number of the weight members using the same weight member, so that it is necessary to prepare a large number of kinds of weight members having different weights. Therefore, there is an effect that it is easy to manage the parts of the weight member.

Further, in the invention of claim 4, the distance from the rocking fulcrum of the key to the rear end of the key is higher on the high tone side than on the low tone side.
Shorten the separation and load the action simulation member near the rear end of the key.
Is given . For example, from the rocking fulcrum of the key to the rear end of the key
The distance should be gradually shortened from the low frequency side to the high frequency side.
For example, if you assemble them so that the rear ends of the keys line up diagonally
Because it is good, you do not make a mistake in the key arrangement during assembly.
This has the effect of facilitating assembly. Also, the rock of the key
Set the distance from the dynamic fulcrum to the rear end for each specified key range on the bass side.
It may be configured to be shorter on the treble side than
If it is configured to, the number of key parts is reduced, so
There is an effect that the cost can be reduced accordingly.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an electronic piano will be described below with reference to the drawings. As shown in FIG. 1, the keyboard device 1 of the present electronic piano abuts a plurality of keys 5 swinging around a balance pin 3 as a fulcrum, and a rear end side (right side in the drawing) of the keys 5 to swing the keys 5. And a hammer arm 9 that rotates about the fulcrum 7 as an axis.

The key 5 is made of wood like a general acoustic piano, and a keyboard lead 11 as a weight member, which will be described in detail later, is embedded inside the front end side (left side in the drawing) of the balance pin 3. ing. A hole 21 is formed in the middle of the key 5 in the longitudinal direction, and the balance pin 3 is inserted into the hole 21. A hole 23 is also formed on the front end side of the lower surface of the key 5, and a front pin 27 erected on the upper surface of the chassis 25 is inserted into the hole 23 to prevent the key 5 from rattling left and right. There is.

A printed circuit board 41 is fixed to the upper surface of the chassis 25, and a rubber switch 43 for detecting the movement of the key 5 is attached to the upper surface of the printed circuit board 41. The hammer arm 9 is made of synthetic resin, has a weight 29 at its tip, and is rotatably attached to the hammer flange 31 at its rear end. A protrusion 33 is formed on the lower surface of the hammer arm 9, and the protrusion 33 presses the vicinity of the rear end of the key 5 from above. As a result, the key 5 is given a moment to lift the tip of the key (hereinafter referred to as “tip lifting moment”), the front end side (left side in the drawing) is lifted, and the rear end side lower surface is the cushion 35. It is stationary while abutting against.

The hammer arm 9 thus constructed is rotated with the swing of the key 5. that time,
A moderate load imitating an action is applied to the key 5 from the hammer arm 9, and the touch feeling is as if the load of the action in the acoustic piano is applied. A hammer stopper 37 is provided above the hammer arm 9, and the hammer arm 9 that has rotated up to that point abuts and further rotation is restricted (see the chain double-dashed line in the figure). Further, a sliding member 39 made of a material having excellent wear resistance is interposed between the upper surface of the rear end side of the key 5 and the protrusion 33 so that the key 5 and the hammer arm 9 work smoothly together. Is being done.

Here, as shown in FIG. 2, the balance pin 3 which is the swing fulcrum of the key 5 is arranged along the line AA in the figure, and the balance pin 3 is located on the key pressing side of the key 5. The length to the front end (lower side in the drawing) is set to be the same for all the keys 5 for each white key or black key. Further, the distance from the balance pin 3 to the rear end (upper side in the drawing) of the key 5 is gradually shortened from the low sound range side to the high sound range side. In addition, the hammer arm 9 shown in FIG. 1 has its mounting position moved back and forth according to the rear end position of each key 5. The hammer arms 9 themselves have the same structure and the same weight as those corresponding to any of the keys 5, but the position where the load of the hammer arm 9 is applied (that is, the position where the protrusion 33 presses) and the key 5 are provided. The distance from the swing pin to the balance pin 3 is longer on the low tone side and shorter on the higher tone side. Therefore, the tip lifting moment given to the key 5 by the hammer arm 9 is smaller on the treble range side than on the bass range side.

The above-described keyboard lead 11 is embedded in all of the plurality of keys 5, and the weight of the keyboard lead 11 gives a moment in the direction of canceling the tip lifting moment by the hammer arm 9. That is, the keyboard lead 11 gives a moment to push down the tip of the key 5 (hereinafter, referred to as “tip pushing down moment”).

Here, particularly in this embodiment, by changing the weight of the keyboard lead 11 and the distance from the keyboard lead 11 to the balance pin 3 for each key 5, the moment of pushing down the tip end by the keyboard lead 11 is in the low range. It is gradually reduced from the side toward the treble range, and the balance of moments around the swing fulcrum of the key 5 is made substantially the same for all keys.

Specifically, as shown in FIG. 3 (A), in the keys 5 on the low tone range side (keys from the lowest tone key to a predetermined pitch), each key 5 has the same weight. 2 keyboard lead 11
Individually embedded, the distance from the keyboard lead 11 to the insertion position of the balance pin 3 (that is, the hole 21) is gradually shortened from the low tone range side to the high tone range side. Further, in the high-pitched side key 5, as shown in FIG. 3B, the number of keyboard leads 11 is reduced to one to reduce the weight.
The distance to the twist hole 21 is gradually shortened from the low-pitched sound side toward the high-pitched sound side. In this way keyboard lead 11
By adjusting, the tip pushing moment by the keyboard lead 11 is gradually reduced from the lowest note to the highest note, and the sum of the tip lifting moment by the hammer arm 9 and the tip pushing moment by the keyboard lead 11 is adjusted. However, all keys 5 are made to be almost the same.

As described above in detail, in the keyboard device 1 of the present embodiment, the position of the load (load point) applied by the hammer arm 9 moves toward the treble range from the bass range to the treble range. It is close to the swing fulcrum (balance pin 3). Therefore, even if the key 5 is pressed at the same speed (angular velocity) as that of the treble range, the key 5 of the bass range is longer than the swing fulcrum of the key 5 by the load point. The moment of inertia increases, and the dynamic reaction force applied from the hammer arm 9 to the key 5 increases accordingly. Therefore, when the key 5 is struck, the dynamic key pressing load of the key 5 on the low tone range side is larger than that of the key 5 on the high tone range side, and the touch feels heavy.

Further, in the present embodiment, as described above, the weight of the keyboard lead 11 and the distance from the keyboard lead 11 to the balance pin 3 are adjusted to balance the moment around the swing fulcrum of the key 5. Is almost the same for all keys 5, so that when the key 5 is weakly pressed, the key-pressing load (initial load) at the start of the key-pressing is substantially the same for all keys.

Therefore, in the keyboard device 1 of the present embodiment, there is an effect that a key touch feeling extremely similar to that of an acoustic piano can be obtained regardless of whether the keyboard is hit hard or weak. Further, in addition to the above-described effects, in the present embodiment, the pivotal fulcrum 7 of the hammer arm 9 is brought closer to the load point of the hammer arm 9 with respect to the balance pin 3, so that the key touch on the high frequency range side is achieved. Since it is lighter than the key touch on the low frequency side,
The same hammer arm 9 (having the same weight and size) can be used for each key 5. Therefore, it is not necessary to use a plurality of types of hammer arms or the like having different masses as in the above-described conventional technique (1), and thus there is an effect that component management and assembly work are facilitated.

Further, in the present embodiment, when the weight of the keyboard lead 11 is adjusted, the number of the keyboard leads 11 having the same weight is adjusted, so that it is necessary to prepare many kinds of keyboard leads having different weights. There is no effect, and there is an effect that parts management becomes easy. Further, in the present embodiment, the distance from the rocking fulcrum of the key 5 to the rear end of the key 5 is shortened on the high frequency side as compared with the low frequency side, and the hammer arm 9 moves near the rear end of the key 5. Is attached so as to press from above. Therefore, since it is not necessary to attach the hammer arm 9 to the lower side of the key 5, a sufficient space is provided below the key 5. Therefore, for example, a printed circuit board (circuit board) 41,
Set the rubber switch 43, etc., which detects key depression / release to the key 5
There is an effect that it can be easily attached below.

Further, in the present embodiment, the distance from the rocking fulcrum of the key 5 to the rear end of the key 5 is gradually shortened from the low-pitched sound side to the high-pitched sound side, so that it is continuous from the low-pitched sound side to the high-pitched sound side. There is an advantage that it is possible to reproduce a touch feeling that slightly changes. Further, when assembling a plurality of keys 5 side by side, the rear ends of the keys 5 may be arranged so as to be arranged in a diagonally straight line shape (see FIG. 2), so that the arrangement of the keys 5 will not be mistaken during assembly, This has the effect of facilitating assembly.

Although the embodiments have been described above, the present invention is not limited to the above embodiments and can be implemented in various modes. For example, in the above embodiment, the distance from the swinging fulcrum of the key 5 to the rear end of the key 5 is gradually shortened from the treble range side to the bass range side, but the present invention is not limited to this.
For example, as shown in FIG. 4, the distance from the rocking fulcrum of the key 5 ′ to the rear end may be set to be shorter on the treble side than on the bass side for each predetermined key range. That is, in the example shown in FIG. 4, 88 keys from the bass range to the treble range are divided into four groups, and the balance pin of the key 5 ′ (arranged along the line BB in the figure) is divided into four groups. The distance from the rear) to the rear end of the key 5'is changed.

With such a configuration, it is difficult to reproduce the touch feeling that continuously and subtly changes from the low-pitched sound side to the high-pitched sound side, but the number of parts of the key 5'is reduced as compared with the above embodiment. Therefore, there is an effect that the cost can be reduced accordingly. Further, in the above embodiment, the key 5
The key is pressed from above by the hammer arm 9, but the present invention is not limited to this, and the key is pressed from below by the hammer arm as in the conventional keyboard device shown in FIGS. 5 and 6. May be.

Further, in the above embodiment, the position where the load of the hammer arm 9 is applied on the high tone side is closer to the swing fulcrum of the key 5 than on the low tone side.
Although the tip lifting moment by the hammer arm 9 is reduced, the present invention is not limited to this.
It can also be applied to a keyboard device in which the position where the load is applied is the same across all keys. As such a keyboard device, for example, the weight of the hammer arm is changed for each pitch or range of each key 5, or as an action simulation member, a coil spring for urging a predetermined position of the key so that the tip of the key is lifted. , And the spring constant of the coil spring is changed for each pitch or range of the key.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a structure of each key of an electronic piano of an embodiment.

FIG. 2 is a configuration diagram showing a structure of an entire keyboard of the electronic piano of the embodiment.

FIG. 3 is a side view showing the structure of a keyboard, (A) is a side view showing a low-pitched side key, and (B) is a side view showing a high-pitched side key.

FIG. 4 is a configuration diagram showing a structure of an entire keyboard of an electronic piano of another embodiment.

FIG. 5 is an explanatory diagram showing a keyboard device of a conventional technique.

FIG. 6 is an explanatory diagram showing a keyboard device of a conventional technique.

[Explanation of symbols]

1 ... keyboard device, 3 ... balance pin 5 ... key 7 ... fulcrum 9 ... hammer arm 11 ... keyboard lead 21,23 ... hole 27 ... front pin

Continuation of front page (56) Reference JP-A-4-347895 (JP, A) JP-A-4-350697 (JP, A) JP-A-58-127994 (JP, A) JP-A-2-149893 (JP , A) Actual flat 1-103885 (JP, U) Actual flat 5-90586 (JP, U) Actual flat 2-149994 (JP, U) Actual flat 2-149991 (JP, U) Actual flat 1-88995 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G10C 3/12 G10H 1/00-7/00

Claims (4)

(57) [Claims] 1. A keyboard of an electronic musical instrument comprising a plurality of keys which are oscillated and displaced in response to a key depression operation, and an action simulation member which applies a load simulating an action to a position distant from an oscillation fulcrum of the keys. In the device, the swinging fulcrum of the key is located in the middle of the lengthwise direction of the key.
The length from the point to the front end of the key on the key-pressing side is the same for all keys.
They are installed at the same position, and the action simulation member presses the key from above.
Installed so that the load of the above action simulation member is applied and the above
The distance between the rocking fulcrum of the key is higher in the high range than in the low range.
By shortening the action simulation member to raise the moment of trying to lift the tip of the key compared to the bass range.
And a weight member that gives a moment in a direction that cancels the moment given to the key by the action simulation member, and the weight of the weight member or the weight member from the weight member. A keyboard device for an electronic musical instrument, wherein the balance of moments around the swinging fulcrum of the key is made substantially the same over all keys by adjusting the distance to the swinging fulcrum. 2. When adjusting the weight of the weight member
The keyboard device for an electronic musical instrument according to claim 1, wherein the number of weight members having the same weight is increased or decreased . 3. The action simulation member is the same as all keys.
The keyboard device for an electronic musical instrument according to claim 1 or 2, wherein one is used . 4. The treble range of the key is higher than that of the low range side.
Shorten the distance from the swing fulcrum to the rear end of the key, and attach the load of the action simulation member near the rear end of the key.
Electronic musical instrument keyboard apparatus according to any one of claims 1 to 3, characterized in that it is given.