JPH0997074A - Electronic piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the electronic piano which can obtain an excellent touch feeling very close to that of an acoustic piano by adequately varying the touch feeling according to whether a damper pedal is on/off. SOLUTION: This electronic piano is equipped with the damper pedal and a pedal sensor which detects the on/off-state of the damper pedal and gives specific damper effect when the pedal sensor detects the on-state of the damper pedal. This electronic piano is equipped with a swingable keyboard 2, the rotatable damper lever 18 which is driven by the pressed keyboard 2, a return spring 20 which energizes the damper lever 18 in the opposite direction from the direction of the driving by the keyboard 2, and a damper lever driving means 19 which moves the damper lever 18 to a reset position where it can not be driven by the keyboard 2 when the pedal sensor detects the on-state of the damper pedal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic piano, and more particularly, to an electronic piano capable of providing a touch feeling similar to that of an acoustic piano.

[0002]

2. Description of the Related Art Conventionally, various attempts have been made to bring the touch feeling of an electronic piano closer to that of an acoustic piano, and the applicant of the present invention also discloses such an electronic piano in, for example, Japanese Patent Application No. 7-136740. I am proposing to.

As shown in FIG. 2, the electronic piano 51 has the same appearance and outer dimensions as an acoustic upright piano (hereinafter, simply referred to as "upright piano"), and as shown in FIG. , Keyboard 2
A simulated action device 53 is provided above the rear end portion.
The simulated action device 53 is configured exactly like the action device of an upright piano except that a damper mechanism unnecessary for sounding is omitted, and basically performs the same action operation.

That is, the simulated action device 53 includes a wippen 6, a jack 7, a hammer 8 and the like,
The hammer 8 is composed of a bat 10, a hammer shank 11, a hammer head 12, and the like. When the keyboard 2 is pressed, the capstan screw 5 rotates the wippen 6 upward to raise the jack 7, and the jack 7 pushes up the bat 10, whereby the hammer 8 rotates counterclockwise. To do. During the rotation of the hammer 8, the jack 7 engages with the regulating button 24 and is rotated in the clockwise direction, so that the jack 7 is detached from the bat 10. With the removal of this Jack 7,
A so-called let-off feeling peculiar to an upright piano is added. Then, the hammer 8 rotates in an inertial state in which the jack 7 is disengaged, and the hammer head 12 hits the hammer stopper 9 as a pseudo string striking operation of the hammer in the upright piano.

The above-described operation of the simulated action device 53 is almost the same as that of the action device of the upright piano, and therefore, a touch feeling similar to that of the upright piano can be obtained.

As shown in FIG. 2, the electronic piano 51 further includes three pedals, a damper pedal 13a, a muffler pedal 13b, and a soft pedal 13c, and these ON pedals.
Pedal sensors (not shown) for detecting the respective ON / OFF states. And, for example, the damper pedal 1
When 3a is stepped on (turned on), the damper effect of the acoustic piano, that is, a continuous sound or a resonance sound generated by the damper releasing the strings all at once, is detected according to the state detected by the pedal sensor. It is supposed to be granted.

[0007]

However, the above-described conventional electronic piano electronically imparts a damper effect associated with the depression of the damper pedal and, unlike the upright piano, does not have a damper mechanism. However, the reaction force when driving this cannot be obtained, and a sense of discomfort occurs with the touch feeling of the upright piano.

As is well known, upright pianos have
A damper mechanism is provided between the keyboard and the strings, and when the damper pedal is not depressed, the pressed keyboard presses the damper mechanism to drive it and releases the string just before the hammer hits the string. It is supposed to do. Therefore, the reaction force when driving the damper mechanism is added / reflected as the touch weight to the touch feeling. On the other hand, when the damper pedal is stepped on, the damper mechanism is simultaneously moved away from the strings in conjunction with this, so that the damper effect is imparted and the damper mechanism is moved away from the keyboard. Becomes impossible to drive, and its reaction force becomes zero.

The solid line in FIG. 5 is a static touch characteristic graph showing the transition of the touch weight with respect to the key pressing stroke when the keyboard is pressed slowly when the damper pedal is not depressed in the upright piano. is there. As can be seen from this figure, in the case of an upright piano, as the key depression of the keyboard progresses, the reaction weight of the damper mechanism is added with the touch weight due to the reaction force of the keyboard, the wippen and the hammer as the first mountain A. In addition, the touch weight when the hammer strikes the string is the second peak B, the touch weight immediately before the jack leaves is the third peak C, and the touch weight when the hammer strikes the string is the final peak D. .

On the other hand, in the conventional electronic piano 51, since there is no component corresponding to the damper mechanism of the upright piano, as shown by the broken line in FIG.
The second mountain B cannot be obtained, which causes a feeling of strangeness with the touch feeling of the upright piano.

The present invention has been made to solve the above problems, and the damper pedal is turned on / off.
It is an object of the present invention to provide an electronic piano that can appropriately change the touch feeling according to F, thereby obtaining a good touch feeling that is very close to that of an acoustic piano.

[0012]

To achieve the above object, the present invention comprises a damper pedal and a pedal sensor for detecting the ON / OFF state of the damper pedal,
An electronic piano configured to give a predetermined damper effect when the pedal sensor detects an ON state of a damper pedal, and is a swingable keyboard and a key driven by a key pressed. A freely movable damper lever,
A return spring that urges the damper lever in the direction opposite to the direction in which it is driven by the keyboard, and a damper lever that moves the damper lever to a release position where it cannot be driven by the keyboard when the pedal sensor detects the ON state of the damper pedal. And a driving means.

According to this electronic piano, when the keyboard is pressed when the damper pedal is off, the damper lever
The keyboard is driven against the spring force of the return spring to rotate. As a result, the reaction force of the damper lever and the return spring at this time is transmitted to the fingertips of the player as touch weight, and is added / reflected to the touch feeling, so that it is as good as when driving the damper mechanism in the acoustic piano. You can get a touch feeling. When the keyboard is released, the damper lever returns to its original position by the spring force of the return spring.

On the other hand, the damper pedal is turned on from this state.
Then, in response to the pedal sensor detecting this state, a predetermined damper effect is imparted, and the damper lever drive means moves the damper lever to the release position. As a result, the damper lever cannot be driven by the pressed keyboard, and as a result, the reaction force of the damper lever becomes zero. This is also the same as when the damper pedal of the acoustic piano is turned on. As described above, in the electronic piano of the present invention, when the damper pedal is off, the reaction force of the damper lever and the return spring is added / reflected to the touch sensation, while the damper pedal O
At the time of N, these reaction forces can be set to zero, and therefore, a good touch feeling according to ON / OFF of the damper pedal can be obtained as in the acoustic piano.

In this case, it is preferable that the reaction force when the keyboard drives the damper lever is set to a value equal to the reaction force of the damper mechanism in the acoustic piano. With this configuration, the touch weight added when driving the damper lever can be made equal to that when driving the damper mechanism in the acoustic piano, and a better touch feeling can be obtained.

In these cases, the electronic piano is further provided with a simulated action device, and the simulated action device is driven by a depressed key to rotate upward, a rotatable hammer, and this hammer. The hammer stopper, which is arranged so as to face each other, is rotatably attached to the wippen, and it is rotated by pushing up the hammer when the keyboard is pressed.While the hammer is rotating, the hammer stops the hammer stopper. And a jack configured to disengage from the hammer before being hit.

According to this electronic piano, the depressed keyboard causes the jack to rise as the wippen rotates upward, and the jack pushes up the hammer, whereby the hammer rotates. The jack separates from the hammer during the rotation of the hammer. Then, the hammer rotates in the inertial state in which the jack is disengaged, and strikes the hammer stopper as a pseudo string striking action of the hammer in the acoustic piano. The operation of the above-described simulated action device is almost the same as the operation of the action device of the acoustic piano when combined with the drive operation of the damper lever, so that as a whole, a touch feeling very similar to that of the acoustic piano is obtained. You can

In these cases, the key depression stroke by which the keyboard drives the damper lever is set to a predetermined key depression stroke between the key depression stroke by which the wippen is driven and the key depression stroke by which the jack is disengaged from the hammer. Is preferred. According to this electronic piano, when the keyboard is pressed, the wippen is driven first, then the damper lever is driven with a predetermined keystroke stroke, and then the jack is released from the hammer with a predetermined keystroke stroke.
The relationship between the operation timing of the wippen, the damper lever and the jack with respect to the key depression of the keyboard is the same as that of the acoustic piano. Therefore, not only the touch weight but also the entire touch curve can be brought close to the acoustic piano. It is possible to obtain a better touch feeling.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the drawings. In the following description, the same reference numerals are used for the elements having the same configurations and functions as those of the conventional electronic piano 51 of FIG. 6 described above. FIG. 1 shows a keyboard device of an electronic piano to which the present invention is applied, and FIG. 2 shows an appearance of the electronic piano.

As is apparent from FIG. 2, this electronic piano 1 has the same appearance and outer dimensions as an upright piano, like the conventional electronic piano 51, and has a damper pedal 13a provided at the center of its lower end. , A muffler pedal 13b and a soft pedal 13c, and pedal sensors (not shown) for respectively detecting ON / OFF states of these pedals. As shown in FIG. 1, the electronic piano 1 includes, as a keyboard device, a swingable keyboard 2, a simulated action device 3 provided above a rear end portion of the keyboard 2, and a front lower portion of the keyboard 2. It is provided with a keyboard switch 4 arranged and a sound generation control device (not shown) connected to the keyboard switch 4.

The simulated action device 3 imitates an action device of an upright piano, has the same structure as the conventional simulated action device 53, and additionally has a simulated damper mechanism 14. Specifically, the rear end portion is rotatably supported by the center rail 15, and the wippen 6 placed on the keyboard 2 via the capstan screw 5 and the lower end portion are the wippen 6
A rotatably supported jack 7 having an L-shaped cross section, a hammer 8 rotatably supported by a center rail 15,
It has a hammer stopper 9 fixed to the action bracket 16 and arranged behind the hammer 8. The hammer 8 is a bat 10 with which the upper end of the jack 7 abuts.
And a hammer shank 11 extending upward from the bat 10.
And a hammer head 12 that extends rearward from the hammer shank 11 at a right angle and faces the hammer stopper 9.

As shown in detail in FIG. 3, the simulated damper mechanism 14 has a damper spoon 17 protruding upward from the rear end of the wippen 6, a center portion rotatably supported by a center rail 15, and a lower end portion. Is engaged with the damper spoon 18, a solenoid (damper lever driving means) 19 for driving the damper lever 18, and an upper portion of the damper lever 18, which are engaged with each other. The return spring 20 is composed of a leaf spring that constantly urges in the counterclockwise direction.

The solenoid 19 is composed of an exciting coil 22 wound around a tubular body 21 and a movable iron core 23 slidably inserted into the tubular body 21. The movable iron core 23 is a damper spoon 17 of a damper lever 18. It is fixed to the opposite surface. The solenoid 19 has a movable iron core 23 when demagnetized.
Is in a free state with respect to the tubular body 21, while the movable iron core 23 is forcibly pulled toward the tubular body 21 side during excitation. Further, the solenoid 19 is connected to a control circuit (not shown), and this control circuit
The energization of the solenoid 19 is controlled according to the detection result of the pedal sensor that detects the ON / OFF state of the damper pedal 13a.

On the other hand, the keyboard switch 4 is composed of a rubber switch which is turned on in two steps by different key pressing strokes of the keyboard 2 when pressed by the lower surface of the keyboard 2, and its ON signal (detection signal) is output. Output to the pronunciation control device. The pronunciation control device, based on the detection signal of the keyboard switch 4,
Presence or absence of key depression on each keyboard 2 and key depression speed (velocity)
Is calculated, and the pronunciation of the electronic piano 1 is controlled according to the calculation result. Further, the sound generation control device imparts a pedal effect corresponding to the pedal that is turned on, according to the detection result of each pedal sensor.

Next, the operation of the electronic piano 1 having the above configuration will be described with reference to FIGS. 1, 3 and 5. In FIG. 1, the keyboard 2 is released and the damper pedal 13a is off.
Shows the state of. That is, in this state, the solenoid 19 is demagnetized by the control of the control circuit, and the damper lever 18 is, as shown by the solid line in FIG.
It is rotated counterclockwise by the spring force of the return spring 20 and is located at a position close to the damper spoon 17.

When the keyboard 2 is pressed from this state, first, the capstan screw 5 rotates the wippen 6 upward to raise the jack 7, and the jack 7 pushes up the bat 10 to push the hammer. 8 rotates counterclockwise (mountain A in FIG. 5). On the other hand, as the wippen 6 rotates, the damper spoon 17 integrated with the wippen 6 also rotates and gradually approaches the damper lever 18. Then, when the predetermined key depression stroke is reached, the damper spoon 17 comes into contact with the damper lever 18, and the movable iron core 23 of the solenoid 19 is moved to the cylinder body 21 side against the spring force of the return spring 20. While pressing, the damper lever 18 is rotated clockwise in the figure (mountain B in FIG. 5).

During this time, the hammer 8 continues to rotate,
When the predetermined key depression stroke is reached, the jack tail 7a of the jack 7 is engaged with the regulating button 24, whereby the jack 7 is rotated clockwise and separated from the bat 10 (see FIG. 5). Mountain C). After that, the hammer 8 is rotated in an inertial state in which the jack 7 is detached, and the hammer head 12 strikes the hammer stopper 9 as a pseudo string striking operation of the hammer in the acoustic piano (peak D in FIG. 5). The pressed state of the keyboard 2 is detected by the keyboard switch 4, and the sounding control device determines the pitch and volume based on the detection result of the keyboard switch 4, and immediately after the hammer head 12 hits the hammer stopper 9. , Start pronunciation.

As described above, the electronic piano 1 of this embodiment
According to this, when the damper pedal 13a is OFF,
Since the damper lever 18 is mechanically driven by the keyboard 2 and the reaction force can be added / reflected to the touch feeling, a good touch feeling very similar to an upright piano can be obtained. In addition, as the key on the keyboard 2 is pressed, the wippen 6 and the like, the damper lever 18, the jack 7 are removed, and the hammer 8 is struck with a predetermined key stroke, so that the hammer 8 is hit in response. Touch peaks and peaks appear at the specified timing,
It is possible to obtain a touch curve similar to the touch curve of the upright piano shown in, and thus a very good touch feeling can be obtained.

In this case, the reaction force including the return spring 20 and the movable iron core 23 of the solenoid 19 when the keyboard 2 drives the damper lever 18 is set to a value equal to the reaction force of the damper mechanism in the upright piano. It is preferable. With such a setting, the touch weight when the keyboard 2 drives the damper lever 18 can be made equal to the touch weight when driving the damper mechanism in the upright piano, and a better touch feeling can be obtained. You can

On the other hand, when the damper pedal 13a is depressed, in response to the pedal sensor detecting this state, the sound generation control device imparts a predetermined damper effect, and the solenoid 19 is controlled by the control circuit. Energized and excited. As a result, the movable iron core 23 of the solenoid 19
Is forcibly pulled toward the cylindrical body 21 side, and the damper lever 18 fixed to this is rotated clockwise to the release position shown by the broken line in FIG. 1 to move away from the damper spoon 17. At this release position, even if the keyboard 2 is pressed, the damper lever 18 cannot be driven by the damper spoon 17, and the reaction force becomes zero. This is also the same as the upright piano.

As described above, the electronic piano 1 of this embodiment
Then, when the damper pedal 13a is OFF, the reaction force of the damper lever 18 and the return spring 20 is added / reflected to the touch feeling, while when the damper pedal is ON, these reaction forces can be made zero, and therefore Similar to a light piano, a good touch feeling can be obtained according to ON / OFF of the damper pedal.

FIG. 4 shows an example of an electronic piano 61 according to the second embodiment of the present invention. This electronic piano 61
Is a damper lever driving means, instead of the solenoid 19 of the electronic piano 1 of the first embodiment, a wire mechanism 6
2 is used, and other configurations are exactly the same as the electronic piano 1. The wire mechanism 62 includes a take-up reel 63 and a wire 64 wound around the take-up reel 63 and having one end connected to the damper lever 18. The take-up reel 63 is connected to a motor (not shown) capable of rotating in the forward and reverse directions, and the operation of this motor is controlled by a control circuit according to ON / OFF of the damper pedal 13a.

According to this configuration, the damper pedal 13a
When is OFF, the take-up reel 63 is rotated clockwise by a predetermined angle by the control of the control circuit, and the wire 64 is paid out by a predetermined length. As a result, the wire 64 is loosened and the damper lever 18 is returned to the return spring 20.
The spring force causes the damper spoon 17 to rotate to a position shown in the figure, and the damper spoon 17 can be driven in response to the key depression of the keyboard 2. On the other hand, when the damper pedal 13a is turned on, the take-up reel 6
3 rotates in the opposite direction by the same angle and winds the wire 64 for the same length, whereby the damper lever 18 rotates to the release position away from the damper spoon 17, and it becomes impossible to drive depending on the keyboard 2. Become.

As is clear from the above operation of the wire mechanism 62, also in the electronic piano 61 of this embodiment, the position of the damper lever 18 is set to the O of the damper pedal 13a.
Since it can be regulated similarly to the electronic piano 1 according to N / OFF, it is possible to obtain the same effect as that of the first embodiment.

The present invention is not limited to the embodiments described above, but can be implemented in various modes.
For example, the embodiments described above are examples in which the present invention is applied to an action device of an upright piano,
The present invention can of course be applied to an action device of a grand piano. Further, the damper lever drive means is not limited to the illustrated solenoid and wire mechanism, and other suitable means can be adopted. Furthermore, when a solenoid is used, a return spring is built in the tubular body. Good. In addition, the configuration of the details can be appropriately changed without departing from the spirit of the present invention.

[0036]

As described above in detail, the electronic piano of the present invention appropriately changes the touch feeling in accordance with ON / OFF of the damper pedal, and as a result, a good touch feeling very close to that of an acoustic piano is obtained. It has the effect of being able to obtain

[Brief description of drawings]

FIG. 1 is a side view of a keyboard device of an electronic piano according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of the present invention and a conventional electronic piano.

FIG. 3 is an enlarged side view of a main part of FIG. 1;

FIG. 4 is an enlarged side view of an essential part of the electronic piano according to the second embodiment of the present invention, similar to FIG.

FIG. 5 is a static touch characteristic graph of an upright piano, an electronic piano of the present invention, and a conventional electronic piano.

FIG. 6 is a side view of a keyboard device of a conventional electronic piano.

[Explanation of Codes] 1 Electronic Piano 2 Keyboard 3 Simulated Action Device 6 Wippen 7 Jack 8 Hammer 9 Hammer Stopper 13a Damper Pedal 14 Simulated Damper Mechanism 18 Damper Lever 19 Solenoid 20 Return Spring 61 Electronic Piano 62 Wire Mechanism

Claims (4)

[Claims] 1. A damper pedal, and a pedal sensor for detecting an ON / OFF state of the damper pedal,
An electronic piano configured to give a predetermined damper effect when the pedal sensor detects the ON state of the damper pedal, and is driven by a swingable keyboard and the depressed keyboard. A rotatable damper lever, a return spring for urging the damper lever in a direction opposite to the driving direction by the keyboard, and the damper lever when the pedal sensor detects an ON state of the damper pedal. An electronic piano, comprising: a damper lever drive means for moving to a release position where the keyboard cannot drive. 2. The electronic piano according to claim 1, wherein a reaction force when the keyboard drives the damper lever is set to a value equal to a reaction force of a damper mechanism in an acoustic piano. . 3. A mimic action device is further provided, wherein the mimic action device is driven by the depressed keyboard and pivots upward, a rotatable hammer, and a hammer so as to face the hammer. The hammer stopper arranged is rotatably attached to the wippen, and is rotated by pushing up the hammer along with the key depression of the keyboard, and during rotation of the hammer, the hammer stops the hammer stopper. The electronic piano according to claim 1 or 2, further comprising: a jack configured to be detached from the hammer before being hit. 4. A key pressing stroke for driving the damper lever by the keyboard is a predetermined key pressing stroke between a key pressing stroke for driving the wippen and a key pressing stroke for releasing the jack from the hammer. The electronic piano according to claim 3, wherein the electronic piano is set.