JPH09212168A - Dummy action of electronic keyboard musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the dummy action of the electronic keyboard musical instrument which actualizes a touch at let-off time with simple structure. SOLUTION: A hammer 20 is supported rotatably on a rotary shaft 13. An escapement 30 has a horizontal surface and a vertical surface 32 which forms a hooked step, supported rotatably on a support shaft 36, energized forward by a spring 38 and pressed against an escapement stopper 37. The ceiling surface of a multifunctional rail 40 is a hammer stopper part 41 which can abut against the string hit part 22 of the hammer 20 that is put in inertial motion by being rotated and let off in response to key depression, the wall surface is a back check part 42 which can abut against the string hit part 22 of the hammer 20 which is a keyboard 11 is continuously pressed when the hammer 20 swings back after striking on the hammer stopper part 41, and the bottom surface is a hammer rest part 43 which can abut against the hammer 20 at it stationary position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pseudo action for applying a load simulating an action to a keyboard in an electronic keyboard instrument such as an electronic piano.

[0002]

2. Description of the Related Art Conventionally, there are known electronic keyboard musical instruments such as electronic pianos, which are provided with various pseudo-actions so as to bring the touch feeling of the keyboard closer to that of an acoustic upright piano (Japanese Patent Laid-Open No. 4-42). 347895). For example, as shown in FIG. 7, one having a hammer arm P14 that is rotatable about an axis P10 and presses the rear end of the key P12 from above is known.

[0003]

However, in such a pseudo action, since the weight rotates about one axis, the dynamic weight of the keyboard of the acoustic piano is reproduced, but at the time of let-off. There was a problem that the touch was not reproduced and the touch became monotonous. here,
Let us outline let-off. In a normal acoustic piano, when the keyboard is pressed, the pressing force is transmitted by the action mechanism to rotate the hammer toward the strings, but the hammer performs inertial motion immediately before striking the strings. The timing when performing this inertial motion is called let-off.

In addition, since the electronic piano is required to keep the cost as low as possible, it has been desired to realize the above-mentioned touch feeling with a simple structure. The present invention has been made in view of the above problems, and an object of the present invention is to provide a pseudo-action of an electronic keyboard instrument that can realize a touch at the time of let-off with a simple structure.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 strikes the keyboard rotatably supported by the balance pin and the tip side of the rod-shaped shank portion. A string portion, a beak portion at a base end side of the shank portion, a hammer rotatably attached to a rotation shaft provided at the back side of the keyboard at the shank portion, and the keyboard are depressed. A hammer rest that supports the hammer in a predetermined stationary position in the absence state, and when the keyboard is pressed, contacts the beak portion of the hammer to rotate the hammer from the stationary position around the rotation axis, Further, when the keyboard is pushed down and the hammer reaches the predetermined let-off position, the escapement of the beak portion of the hammer is separated, and after the keyboard is pushed down and the hammer reaches the predetermined let-off position, during the inertial movement. Before Wherein the string striking portion of the hammer is equipped with a hammer stopper provided on possible collision position.

In the pseudo-action according to the first aspect, the hammer is supported by the hammer rest at a predetermined rest position when the keyboard is not depressed. When the player presses a key, the keyboard rotates around the balance pin and the back side of the keyboard rises. Then, the rotary shaft provided on the back side of the keyboard also rises accordingly. The hammer is rotatably supported on the rotary shaft by the shank portion, and when the keyboard is pressed, the beak portion comes into contact with the escapement, so that the hammer rotates from the stationary position around the rotary shaft. . Then, when the keyboard is further pressed and the hammer reaches the let-off position, the beak portion of the hammer separates from the escapement. After that, the hammer makes an inertial motion and collides with the hammer stopper.

As described above, according to the pseudo-action according to the first aspect of the present invention, the touch feeling of the keyboard suddenly becomes light at the time of let-off, so that the same feel as at the time of let-off of the ordinary acoustic piano can be obtained. Also, since this pseudo-action is composed of a keyboard, hammer, hammer rest, escalation and hammer stopper, compared to a normal acoustic piano in which a wippen, jack, bat, etc. are interposed between the keyboard and the hammer, the parts are It has a small number of points and a simple structure, can be easily assembled, and can be manufactured at low cost.

A second aspect of the present invention is a pseudo-action of the electronic keyboard instrument according to the first aspect, wherein when the hammer collides with the hammer stopper and then swings back, the keyboard is still pressed. Is equipped with a back check for supporting the hammer before coming into contact with the striking portion of the hammer and returning the hammer to a predetermined stationary position.

In the pseudo-action according to the second aspect of the present invention, since the back check is provided, when the hammer collides with the hammer stopper and swings back, the back check is performed when the keyboard is still pressed. The hammer is supported by making contact with the string striking portion. Then, when the depression of the keyboard is released thereafter, the hammer is separated from the back check and returns to the predetermined stationary position.

As described above, according to the pseudo-action according to the second aspect, since the back stop can be realized, the touch feeling can be brought closer to that of the acoustic piano. The back stop is realized by an action mechanism in the case of a normal acoustic piano.

According to a third aspect of the present invention, there is provided a pseudo action of the electronic keyboard instrument according to the second aspect, wherein the hammer rest, the hammer stopper and the back check are arranged in a direction in which a plurality of the keyboards are arranged. It is characterized in that it is provided on a rail extending along.

In the pseudo action according to the third aspect, since it is not necessary to separately provide the hammer rest, the hammer stopper and the back check, it is possible to obtain an effect that the structure can be made simpler and the manufacturing cost can be reduced.

[0013]

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 schematic block diagram of an electronic piano, FIG. 2 is a front view of the electronic piano, and FIGS.

The electronic piano 1 of this embodiment includes a keyboard 11, a control device 10, an electronic sound source 5, and a pseudo action 2. A plurality of keyboards 11 are arranged along the shelf board 46 as shown in FIG. Further, as shown in FIG. 3, the keyboard 11 is rotatably supported by the balance pin 27, and the capsule 12 having the rotation shaft 13 is provided on the upper surface on the back side thereof.
Key sensors 63 and 65 are provided on the lower surface. The key sensors 63 and 65 are detection means (photointerrupters) for detecting key depression / key release, and each of them comprises a light emitting element and a light receiving element as a set. Each key sensor 6
An optical path runs between the light emitting element and the light receiving element of Nos. 3 and 65, and is configured to emit an ON signal when the optical path is blocked. The optical paths of the key sensors 63 and 65 are blocked by a stepped shutter 61 provided on the bottom surface of the keyboard 11.
It is conducted. That is, when the keyboard 11 is pressed, the optical path of the key sensor 63 is blocked by the stepped shutter 61 and emits an ON signal. After a certain time difference, the optical path of the key sensor 65 is blocked by the stepped shutter 61 and emits an ON signal. Of. These key sensors 63, 6
As shown in FIG. 1, 5 is connected to the control device 10.

The control device 10 includes a control box 5
c (see FIG. 2), and as shown in FIG.
Input / output port 71, well-known CPU 72, ROM 73, R
It is configured as a logical operation circuit including an AM 74, a backup RAM 75, a clock 76, etc., and these are connected to each other by a bus 77. The control device 10 is connected to the key sensors 63 and 65 via the input / output port 71, and is also connected to the electronic sound source 5 via the input / output port 71. The CPU 72 obtains the time and the time difference for shutting off the optical paths of the key sensors 63 and 65 based on the ON / OFF signal, temporarily stores these in the RAM 74, and RO
A signal is output to the electronic sound source 5 based on the control program stored in M73. A pedal sensor (not shown) that detects the operation of a pedal mechanism such as a damper pedal or a soft pedal is also connected to the control device 10, and a signal is output to the electronic sound source 5 in consideration of this detection information. Is.

The electronic sound source 5 is fixed to the inner bottom surface of the piano as shown in FIG. A control box 5c having a power switch 5a for the electronic sound source 5 and a volume knob 5b is fixed to the lower surface of the shelf board 46. This control box 5c has a headphone jack 5
d is provided, and by inserting a headphone plug into the headphone jack 5d, the outputs from the speakers 6a and 6b are stopped and the output is made to the headphones. Speakers 6a for the middle and high-pitched sound parts are provided on the left and right sides of the upper front plate 47, and are protected by the upper net 7. On the other hand, the bass speaker 6b is provided on the left and right sides above the lower front plate 48, and is protected by the lower net 8.

The pseudo action 2 which is a feature of the present invention is
It is arranged on the back side of the keyboard 11 and, as shown in FIG. 3, includes a hammer 20, an escapement 30, and a multi-function rail 40. The hammer 20 has a rod-shaped shank portion 21,
The shank portion 21 is provided with a string striking portion 22 formed so as to be bent at about 90 ° and a beak portion 23 formed by obliquely cutting off the end portion at the base end of the shank portion 21. The hammer 20 is rotatably supported by the rotary shaft 13 at a position near the base end of the shank portion 21.

The escapement 30 is a member having a hook-shaped step, and is rotatably supported by a support shaft 36 provided on a reed 49 (a member placed on the shelf plate 46).
The escapement 30 includes a horizontal surface 31 and a vertical surface 32 that form a hook-shaped step. Further, an escalation stopper 37 is provided on the front side (left side in FIG. 3) of the escalation 30 and on the back side (right side in FIG. 3).
A spring 38 is provided in the.

The escapement 30 is urged toward the front side by a spring 38, and the escapement stopper 37.
It is pressed against and is positioned at a position that satisfies the following conditions. That is, the horizontal plane 3 of the escapement 30.
The reference numeral 1 indicates the beak portion 23 of the hammer 20 in the stationary position so that the beak portion 23 comes into contact with the beak portion 23 when the keyboard 11 is pushed down and the pivot shaft 13 rises. 32 is positioned so as to contact the beak portion 23 of the hammer 20 if the keyboard 11 continues to be depressed when the hammer 20 collides with the hammer stopper portion 41 and then swings back.

The multi-function rail 40 is a rail having a substantially U-shaped cross section and extends along the direction in which the plurality of keyboards 11 are arranged. Inside the multi-function rail 40 is a cushioning material 4
0a (for example, felt or urethane rubber) is attached. The ceiling surface of the multi-function rail 40 is a hammer stopper portion 41, the wall surface is a back check portion 42,
The bottom surface is the hammer rest portion 43. Hammer stopper 4
Reference numeral 1 is a member simulating a string, and can be brought into contact with the string striking portion 22 of the hammer 20 rotated by pressing a key. Further, in the back check part 42, the hammer 20 has the hammer stopper part 4
It can come into contact with the string striking portion 22 of the hammer 20 when the keyboard 11 is continuously pressed when the keyboard 11 collides with 1, and then swings back. Further, the hammer rest portion 43 can contact the hammer 20 in the stationary position.

Next, the operation of the electronic piano of this embodiment will be described with reference to FIGS. FIG. 3 is an explanatory view when the hammer of the pseudo action is in the stationary position, FIG.
4A is an explanatory diagram immediately before the let-off, and FIG. 4B is an explanatory diagram at the time of backstop. When the keyboard 11 is pressed down, the keyboard 11 rotates about the balance pin 27, so that the rotation shaft 13 rotates counterclockwise, that is, upward in FIG. Then, the beak portion 23 of the hammer 20 comes into contact with the horizontal surface 31 of the escapement 30. After that, when the rotating shaft 13 further rotates in the upward direction, the hammer 20 rotates clockwise around the rotating shaft 13 in FIG. The string striking portion 22 rotates upward.

By the way, the rotary shaft 13 has a balance pin 27.
As the keyboard 11 is pressed down, the beak portion 23 of the hammer 20 gradually moves toward the front side (left side in FIG. 3) along the horizontal plane 31 of the escalation 30 as the keyboard 11 is pushed down. Finally, the beak portion 23 of the hammer 20 comes off the horizontal surface 31 (see FIG. 4A), and the touch feeling of the keyboard 11 suddenly becomes light. This timing is the let-off, and at this time, since the hammer 20 is biased clockwise around the rotation shaft 13 in FIG. After that, the string striking portion 22 of the hammer 20 collides with the hammer stopper portion 41 of the multifunction rail 40. As a result, the hammer 20 is prevented from inertial movement, and swings back counterclockwise in the opposite direction, that is, in FIG. 4 (a).

When the hammer 20 swings back like this,
If the pressing of the keyboard 11 is released, the hammer 20 falls counterclockwise due to its own weight and stands still in contact with the hammer rest portion 43 of the multifunction rail 40. That is, the hammer 20 returns to the rest position (see FIG. 3).

On the other hand, if the keyboard 11 continues to be depressed when the hammer 20 swings back, the pivot shaft 13 is arranged on the front side as compared with the state in which the keyboard 11 is not depressed, so that the hammer 20 is depressed. The string striking portion 22 comes into contact with the back check portion 42 of the multi-function rail 40 (this position is referred to as a back stop position) and does not return to the stationary position (see FIG. 4B). At this time, the beak portion 23 of the hammer 20 is in contact with the vertical surface 32 of the escapement 30. After that, if the depression of the keyboard 11 is released, the beak portion 2 of the hammer 20 is released.
3 rotates counterclockwise around the rotation shaft 13 in FIG. 4B while pushing the escapement 30 against the spring 38 and pushing it inward. Then, the beak portion 23 is then placed on the vertical surface 3.
When it is disengaged from 2, the escapement 30 is returned to its original position by the biasing force of the spring 38, the hammer 20 abuts on the hammer rest portion 43 of the multifunction rail 40, and returns to the rest position (see FIG. 3).

According to the first embodiment described above, the following effects can be obtained. In the pseudo action 2, the touch feeling of the keyboard 11 suddenly becomes light at the time of let-off, so that the same feeling as that at the time of let-off of a normal acoustic piano can be obtained. Since the pseudo action 2 is composed of the keyboard 11, the hammer 20, the escalation 30, and the multi-function rail 40, the number of parts is larger than that of a normal acoustic piano in which a whippen, a jack, and a bat are interposed between the keyboard and the hammer. It has a simple structure with few defects, can be easily assembled, and can be manufactured at low cost. In the pseudo action 2, since the back stop can be realized, the touch feeling can be brought closer to that of the acoustic piano. Since the multifunction rail 40 includes the hammer stopper portion 41, the back check portion 42, and the hammer rest portion 43, it is not necessary to separately provide each member. Therefore, it is possible to obtain an effect that the structure can be made simpler and the manufacturing cost can be reduced. [Second Embodiment] The second embodiment is different from the first embodiment except that a hammer stop rail 51, a back stop rail 52 and a hammer rest 53 are individually provided instead of the multifunction rail 40 of the pseudo action 2 of the first embodiment. Since the configuration is similar to that of the first embodiment, the same components are designated by the same reference numerals,
The description is omitted.

FIG. 5 and FIG. 6 are explanatory views of the pseudo action of the second embodiment. The hammer stop rail 51 is a member simulating a string, and is formed by attaching a cushioning material 51a (for example, felt or urethane rubber) to the lower surface of the rail extending along the direction in which the plurality of keyboards 11 are arranged, It can come into contact with the string striking portion 22 of the hammer 20 rotated by pressing the key.

The backstop rail 52 is provided with a cushioning material 52a (for example, felt or urethane rubber) so as to partially cover the side surface and the upper surface of the rail extending along the direction in which the plurality of keyboards 11 are arranged. Formed and hammer 2
Hammer 20 when keyboard 11 continues to be pressed when 0 collides with hammer stop rail 51 and then swings back
It is possible to make contact with the string striking portion 22 of.

The hammer rest 53 is a cushioning material (for example, felt or urethane rubber) attached to the upper surface of the keyboard 11.
It is possible to contact the hammer 20 in the stationary position.
Next, the operation of the electronic piano of this embodiment will be described with reference to FIGS. FIG. 5 is an explanatory diagram when the hammer of the pseudo-action is in the stationary position, FIG. 6A is an explanatory diagram immediately before the let-off, and FIG. 6B is an explanatory diagram at the time of backstop.

The operation of the pseudo action of this embodiment is the first
The hammer stop rail 51 fulfills the function of the hammer stopper portion 41 of the multi-functional rail 40 of the embodiment, and the back stop rail 52 fulfills the function of the back check portion 42.
The operation is the same as that of the pseudo action 2 of the first embodiment except that the hammer rest 53 functions as the hammer rest portion 43. Therefore, the description thereof is omitted.

According to the second embodiment described above, among the effects of the first embodiment, the following effects are obtained. [Other Embodiments] For example, in the first embodiment, the bottom portion of the multifunction rail 40, that is, the hammer rest portion 43 is removed to form an inverted L-shaped rail, and the hammer rest 53 of the second embodiment is attached to each keyboard 11. It may be configured. Even in this case, substantially the same effect as the first embodiment can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an electronic piano according to a first embodiment.

FIG. 2 is a front view of the electronic piano of the first embodiment.

FIG. 3 is an explanatory diagram when the hammer of the pseudo action according to the first embodiment is in a stationary position.

4A and 4B are explanatory diagrams of a pseudo action according to the first embodiment, where FIG. 4A is an explanatory diagram immediately before a let-off and FIG. 4B is an explanatory diagram at the time of backstop.

FIG. 5 is an explanatory diagram when the hammer of the pseudo action according to the second embodiment is in the stationary position.

6A and 6B are explanatory diagrams of a pseudo action according to the second embodiment, in which FIG. 6A is an explanatory diagram immediately before a let-off, and FIG.

FIG. 7 is an explanatory diagram of a conventional pseudo action.

[Explanation of symbols]

1 ... electronic piano, 2 ... simulated action, 5 ... electronic sound source,
10 ... control device, 11 ... keyboard,
12 ... Capsule, 13 ... Rotating shaft, 20 ... Hammer, 21 ...
..Shank part, 22 ... string striking part, 23 ... beak part, 27 ...
..Balance pins, 30 ... Escalation,
31 ... Horizontal plane, 32 ... Vertical plane,
36 ... Support shaft, 37 ... Escapement stopper, 38 ... Spring, 40 ...
Multifunctional rail, 41 ... Hammer stopper part, 42 ... Back check part, 4
3 ... Hammer rest part

Claims (3)

[Claims] 1. A keyboard rotatably supported by a balance pin, a rod-shaped shank portion having a string striking portion on the tip side, and a beak portion on the proximal end side of the shank portion, wherein the shank portion A hammer rotatably attached to a rotary shaft provided on the back side of the keyboard, a hammer rest that supports the hammer at a predetermined stationary position in a state where the keyboard is not depressed, and the keyboard is depressed. And contacting the beak portion of the hammer to rotate the hammer from the stationary position around the rotation axis, and further when the keyboard is pressed to reach the predetermined let-off position of the hammer, the beak portion of the hammer is An escapement that separates from each other, and a hammer stopper that is provided at a position where the striking portion of the hammer during inertial movement can collide after the keyboard is pressed and the hammer reaches a predetermined let-off position. Pseudo action of an electronic keyboard musical instrument according to claim. 2. When the hammer swings back after colliding with the hammer stopper, when the keyboard is still pressed down, the hammer hits the string striking portion of the hammer and the hammer returns to a predetermined stationary position. 2. The pseudo action of the electronic keyboard instrument according to claim 1, further comprising a back check for supporting the hammer. 3. The hammer rest, the hammer stopper, and the back check are provided on a rail that extends along the direction in which a plurality of the keyboards are arranged, according to claim 2. Simulated action of electronic keyboard instrument.