JP3188386B2 - Electronic musical instrument keyboard and electronic piano - 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 of an electronic musical instrument for applying a load simulating an action to a keyboard and an electronic piano.

[0002]

2. Description of the Related Art An electronic piano emits an electronic sound from a speaker based on a player's key press and key release operations. The sound emitted from such an electronic piano has been repeatedly improved, and as a result, it has become very unsatisfactory in recent years. Has reached no level. On the other hand, it is pointed out that the touch feeling of the keyboard is considerably different from that of an acoustic piano, and various improvements have been made on this point.

[0003] That is, an electronic piano having an action load simulating member has been developed in order to make the touch of a keyboard closer to an acoustic piano. For example, as shown in FIG.
12, a hammer arm P14 for pressing the rear end of the keyboard P18 from above, and as shown in FIG. 10, the tip of the keyboard P18 can be swung about an axis P16 by pressing the keyboard P18 from below. Hammer arm P that lifts
20 is known (JP-A-4-3478).
No. 95). The action load simulating members shown in FIG. 9 and FIG. 10 are all developed in consideration of an electronic piano having a low roof and as close as possible to an acoustic piano.

However, in an acoustic piano, the wippen, jack, and bat each have different axes, swing around each axis, and separate from the jack at different timings depending on the key pressed state. The touch feel is complex.

On the other hand, a keyboard provided with an action load simulating member as shown in FIGS.
Since the weight swings around one axis, there is a problem that the touch feeling of the keyboard becomes monotonous as compared with the acoustic upright piano.

[0006] To solve this problem, Japanese Patent Application No.
No. 136740 proposes an electronic piano having a touch feeling almost equivalent to that of an acoustic piano by using a whippen equivalent member, a jack equivalent member, and a hammer equivalent member as an action load simulating member.

[0007]

However, the touch feeling is almost the same as that of an acoustic piano. However, the touch response, that is, the sounding timing, sounding intensity (volume) or sound-stopping timing for a key-pressing / key-release operation is not the same as before. Like the electronic piano of this, it remained different from the acoustic piano.

Therefore, it has been studied to detect data that can improve the touch response from the action load simulating member using a plurality of sensors. However, depending on the mounting positions of the plurality of sensors, the detection may be unstable. In particular, when the sound volume is determined from the time difference between the detection timings of the two sensors, the sound volume varies greatly between the keyboards, and a stable touch response of the acoustic piano may not be realized. Also, depending on the mounting position of the sensor, there is a case where the sound cannot be generated during continuous hitting and the sound is interrupted.

As a result of various investigations to determine the cause, a peak resistance generated on the keyboard especially when the jack-equivalent member separates (let-off) from the hammer-equivalent member (including the accessory member interlocked therewith). Completed the present invention by finding that force affects the stability of detection from the action load simulating member, and that the position of the sensor with respect to its let-off affects continuous hitting performance and accurate sound control. did.

That is, the present invention provides not only a touch feeling but also a keyboard device of an electronic musical instrument or an electronic piano.
When the touch response is almost the same as that of an acoustic piano, the keyboard unit of an electronic musical instrument can detect the timing and strength corresponding to striking in a particularly stable manner, and does not cause problems in continuous hitting performance and accurate sound control. And an electronic piano using the same.

[0011]

According to a first aspect of the present invention, there is provided a keyboard device for an electronic musical instrument, wherein an action load simulating member is supported so as to be swingable, and a whippen which swings as the keyboard is swung by a key depression operation. A corresponding member, a jack-equivalent member which is swingably attached to the whippen-equivalent member, and which rises as the whippen-equivalent member is swung by a key-pressing operation, while the jack-equivalent member is raised to a predetermined position,
The jack-equivalent member pushes up and swings, and after the jack-equivalent member ascends to a predetermined position, separates from the jack-equivalent member and collides with the hammer-equivalent member and the tip of the inertial-moving hammer-equivalent member. As a result, the keyboard has a stopper for preventing the movement of the member corresponding to the hammer, so that the touch feeling of the keyboard is almost equal to that of an acoustic piano.

[0012] Further, the first sensor may be configured such that after a peak resistance force generated when the hammer-equivalent member separates (let-off) from the jack-equivalent member is generated on the keyboard, any one of the action load simulating members is used. The timing at which the member reaches a first predetermined position (for example, S1 described later) is detected. In addition, the second sensor may be configured such that any one of the action load simulating members is moved to a second predetermined position before a peak resistance force generated when the hammer equivalent member separates from the jack equivalent member is generated on the keyboard. (For example, S
Detect the timing when it comes to 2).

As described above, the detection of the first sensor is performed after the peak resistance generated on the keyboard when the hammer-equivalent member separates (let-off) from the jack-equivalent member, that is, when the let-off occurs. Detected after the peak of resistance received by the keyboard. That is, the detection of the first sensor does not exist within the let-off resistance peak.

The detection by the second sensor is performed before the peak resistance generated on the keyboard when the hammer-equivalent member separates (let-off) from the jack-equivalent member, that is, when the keyboard is let-off. Detected before the peak of the resisting force. That is, the detection of the second sensor does not exist within the peak of the let-off resistance, and the detection is located between the peak of the let-off resistance and the first sensor.

In the let-off resistance peak and before or after the let-off resistance peak, even if the key is pressed with the same force, the degree of change in the resistance received by the keyboard from the member corresponding to the hammer is different. Even if the positions of the first and second sensors are slightly different, there is a possibility that the detection timing will differ. In particular, since the difference in resistance between positions in the let-off resistance peak is greater than in other states, if the detection position of one sensor is included in this let-off resistance peak, the keyboard will The volume and sounding timing will vary.

There is no significant difference in the change in the resistance that the keyboard receives from the member corresponding to the hammer between the region before the peak of the let-off resistance and the region after the peak. Therefore, even if both sensors are separated before and after let-off, there is less variation in detection for each keyboard than when one of the sensors is present within the peak of let-off.

The first sensor and the second sensor are separated into before and after such a let-off resistance force peak, and detect the timing at which any one of the action load simulating members arrives. The timing difference is stable with little variation among the keys, and the timing corresponding to the striking and the data corresponding to the striking strength (volume) can be obtained with high accuracy.

Therefore, in an electronic musical instrument such as an electronic piano, control of the sounding timing and volume can always be performed stably and with high precision on all keys, and the touch feeling and touch A response can be realized.

Further, since there is no let-off on the side where the keyboard stroke is deeper than the position of the first sensor, the first
The sensor can be arranged at a position sufficiently close to the stringing side in terms of keyboard stroke. The actual striking position of an acoustic piano is deepest below the limit of the keyboard stroke. For this reason, the time from the detection timing of the first sensor to the timing corresponding to the string striking is shorter than the case where the first sensor is arranged at another position, and the fluctuation due to disturbance or the like during the period can be reduced. It is possible to obtain a sound generation timing with a small error from the detection timing of the sensor.

Further, even in the case where key depression and key release are repeated with a small keyboard stroke on the string striking side, such as in the case of continuous striking, the first sensor is more than the peak of the let-off resistance. Because it is deeper in the keyboard stroke, the second sensor can be located close to the peak of the let-off resistance. That is, since the first sensor and the second sensor sandwich the peak of the resistance force of let-off, a sufficient interval for measuring an accurate time difference can be obtained, and the first sensor is adjacent to the second sensor. Since the second sensor itself is not engaged, the second sensor itself can be in close contact with the peak of the let-off resistance, and can be positioned at a relatively deep keyboard stroke. Therefore, the sounding timing and sounding intensity can be detected at a relatively deep keyboard stroke position, and the continuous tapping performance is improved.

By design of the action load simulating member, as shown in FIG. 7 to be described later, a flat portion (a portion where the load hardly changes) is provided in a portion where the keyboard stroke is shallower or deeper than the let-off. By arranging the first and second sensors on the flat portions, a change in the keyboard stroke between the first and second sensors can be more accurately detected on all keys, so that more stable sounding timing and sounding intensity ( Volume) data can be obtained.

As the member of the action load simulating member to be detected by the first sensor or the second sensor, the keyboard, the whippen-equivalent member or the jack-equivalent member, or an accessory member thereof, may be used. . Further, a third sensor for detecting key release timing can be provided. The third sensor detects a key release timing from, for example, the keyboard, the whippen equivalent member or the jack equivalent member, or any of the attached members.

It should be noted that the second sensor may also serve as the third sensor, and the cost of parts is reduced. Therefore,
The keyboard device of the electronic musical instrument described above is incorporated in an electronic piano, and the electronic sound generation control means controls the sounding timing based on the timing corresponding to the stringing detected by the first sensor. By controlling the sound intensity (volume) based on the time difference from the timing detected by the sensor and controlling the sound stop timing based on the key release timing detected by the third sensor, the same touch sensation as that of acoustic can be obtained. And it is possible to perform with a stable touch response.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in the schematic block diagram of FIG. 1, an upright type electronic piano 2 of this embodiment has an action load simulation member 4, a keyboard 6, and a third same number of keyboards as the number of keyboards 6. A key release sensor 8 as a sensor, a jack tail sensor 9 as a second sensor as many as the number of keyboards 6, and a jack sensor 1 as a first sensor as many as the number of keyboards 6
0, a control device 12, an electronic sound source 14, and a speaker 16. Among them, the action load simulation member 4, the keyboard 6, the key release sensor 8, the jack tail sensor 9, and the jack sensor 10 are a keyboard device.

As shown in FIG. 2, the action load simulating member 4 includes a capstan screw-equivalent member 20 which rises when the keyboard 6 swings clockwise in FIG. Is swingably supported by the center rail equivalent member 24 via
A whippen-equivalent member 26 that swings in a direction opposite to the swinging direction of the keyboard 6 when the capstan screw-equivalent member 20 is lifted, and a whippen-equivalent member 26 that is swingably connected to the whippen-equivalent member 26, and a jack tail-equivalent member 28a is connected to a regulating button. A jack-equivalent member 28 which rises together with the whippen-equivalent member 26 until the jack-tail sensor 9 also serves as a jack-tail stopper felt member provided at the lower end of the equivalent member 30;
8 and a bat equivalent member 34 that is swingably supported by a center pin equivalent member 32b of a bat flange equivalent member 32a fixed to the center rail equivalent member 24 and a bat equivalent member 34. Concatenated,
When the bat-equivalent member 34 is pushed up by the jack-equivalent member 28, the hammer shank-equivalent member 36 swings in a direction opposite to the swing direction of the keyboard 6, and the bat-equivalent member protrudes in a direction orthogonal to the hammer shank equivalent member 36. 34, a catcher shank equivalent member 38 protruding from
A catcher-equivalent member 40 attached to the tip of a catcher shank-equivalent member 38 and a hammer shank equivalent member 3
6 and a contact portion 4 that abuts against the side of the hammer shank-equivalent member 36 that has swung back after depressing the key, and attenuates the vibration of the hammer-equivalent member 42.
4a, and a member 44 equivalent to a hammer rail.

The hammer equivalent member 42 does not have a hammer felt unlike a normal acoustic upright piano, but the center of gravity is designed in consideration of the weight of the hammer felt. The jack sensor 10 is provided on the surface of the regulating rail 31a supported by the regulating bracket 31 on the side of the jack equivalent member 28. This jack sensor 1
Reference numeral 0 also serves as a member equivalent to a jack stopper felt, and is provided at a position where it can come into contact with one side surface 28b of the jack equivalent member 28 when a key is pressed.

The jack-equivalent member 28 pushes up the bat-equivalent member 34 by its upward movement, and swings the hammer-equivalent member 42 integrated with the bat-equivalent member 34 via the hammer shank-equivalent member 36 counterclockwise in FIG. After that, the jack tail equivalent member 28a of the jack equivalent member 28 is moved to the regulating button equivalent member 30.
Butt-equipped member 34 separates from the jack-equivalent member 28, that is, let-off is performed, and the hammer-equivalent member 42 is moved by the inertial motion so that the hammer-equipped member 42 It swings counterclockwise until it collides with the stopper felt 45a.

The jack sensor 10 has a bat equivalent member 3.
4 and abuts against the side surface 28b of the jack-equivalent member 28 after being separated from the jack stopper 4, and serves as a jack stopper felt-equivalent member. As described above, before the peak of the resistance force from the hammer-equivalent member 42 generated on the keyboard 6 at the time of let-off, the jack tail sensor 9 detects the jack tail-equivalent member 28a.
Are in contact with each other, so that the contact timing can be detected. Further, since the side surface 28b of the jack-equivalent member 28 comes into contact with the jack sensor 10 after the peak of the resistance force from the hammer-equivalent member 42 generated on the keyboard 6 at the time of let-off, the abutment timing can be detected.

Each of the jack tail sensor 9 and the jack sensor 10 is a hollow member made of rubber, and has a member 28a corresponding to the jack tail or a side surface 28 of the member 28 corresponding to the jack.
When b contacts, it is easily collapsed, and the inner conductive surface is connected to the inner terminal.

An example of the jack tail sensor 9 and the jack sensor 10 is shown in FIG. Sensor 9,1
A plate-like protrusion 11b projects from the rubber head 11a inside the sensors 9 and 10, and two terminals 11e and 11f are provided on a bottom plate 11d inside the sensors 9 and 10.

When the key is depressed, when the side wall 11h is crushed by a predetermined amount by the jack tail-equivalent member 28a or the side surface 28b of the jack-equivalent member 28, the plate-like protrusion 1
The conductive surface 11i at the tip of 1b short-circuits the terminals 11e and 11f. That is, the sensors 9 and 10 are turned on.

As a result, the control device 12
By detecting the change in the impedance between the signal lines 11k and 11m shown in FIG. 3B, it is possible to detect the respective contact timings of the jack tail equivalent member 28a or the side surface 28b of the jack equivalent member 28. The contact strength (contact speed) can be detected from the time difference between the contact timings of the sensors 9 and 10.

As shown in FIG. 2, a shutter 50 is provided on the bottom of the keyboard 6. This shutter 50
Moves up and down as the keyboard 6 swings about the balance pin 18 as a fulcrum. The key release sensor 8 provided below the keyboard 6 is a means for detecting a key release operation by providing a photo interrupter. When the shutter 50 blocks the optical path of the photo interrupter, an off signal is generated. Is configured to emit an ON signal.

Accordingly, the key release sensor 8 continues to emit an off signal as long as the keyboard 6 is kept depressed, and switches from an off signal to an on signal when the key is released. By detecting the signal change from off to on, the key release timing can be detected. The control device 12 can control the sound stop timing based on the key release timing.

As shown in FIG. 1, the control unit 12 includes an input / output port 52, a well-known CPU 54, a ROM 56, and a RAM.
58, a backup RAM 60, a clock 62, and the like.
Are connected by The controller 12 includes a key release sensor 8, a jack tail sensor 9, and a jack sensor 1.
0 is connected via the input / output port 52, and the electronic sound source 14 is also connected via the input / output port 52.

The CPU 54 detects the terminal connection timing of the jack sensor 10, the time difference between this timing and the terminal connection timing of the jack tail sensor 9, and also detects the timing at which the signal of the key release sensor 8 switches from off to on. And these detected data and RO
A signal is output to the electronic sound source 14 based on the control program stored in the M56. The control device 12 is also connected to a pedal sensor (not shown) for detecting the operation of a pedal mechanism such as a damper pedal and a soft pedal, and outputs a signal to the electronic sound source 14 in consideration of this detection information. Things.

The electronic sound source 14 includes a recording unit for recording the performance sound of an acoustic piano, that is, a stringing sound, and a reproducing unit for reading out the sound from the recording unit. , And sounds to the outside via the speaker 16. As shown in FIGS. 3 and 4, the speaker 16 is mounted on the back plate 48 toward the player, that is, toward the front.

Next, the operation of the upright electronic piano 2 having the above configuration will be described. When the player depresses the keyboard 6, as shown in FIG.
The reference numeral 6 swings in a direction opposite to the swinging direction of the keyboard 6 (counterclockwise in the figure), whereby the jack-equivalent member 28 rises and pushes up the bat-equivalent member 34. Then, the bat equivalent member 34 swings together with the hammer shank equivalent member 36 and the hammer equivalent member 42 in the opposite direction (counterclockwise in the drawing) to the swing direction of the keyboard 6. And a jack equivalent member 2
8 rises to a predetermined position, the jack-tail-equivalent member 28a contacts the jack-tail sensor 9 at the lower end of the regulating button-equivalent member 30, so that the jack-equivalent member 28 moves in the swinging direction of the keyboard 6 (clockwise in the figure). It swings greatly and separates (let-off) from the bat equivalent member 34. Therefore, the bat-equivalent member 34 after the jack-equivalent member 28 is separated from the hammer shank-equivalent member 3
6 and the hammer equivalent member 42 perform an inertial motion.
After being separated from the bat-equivalent member 34, the jack-equivalent member 28 abuts on the side surface 28b of the jack sensor 10 and stops. The tip of the hammer-equivalent member 42 collides with the hammer stopper 45, and the hammer-equivalent member 42 operates. Is blocked.

Next, a description will be given, with reference to the flowchart of FIG. 5, of the sound generation processing by the control device 12 when the performance is performed as described above. This process is an interrupt process that is started when the terminals 11e and 11f of the jack tail sensor 9 are short-circuited (hereinafter, referred to as “on”), that is, when the second sensor is turned on. When this processing is started, first, the jack tail sensor 9 is turned on (the second sensor is turned on).
Within a predetermined period of time, the side surface 2 of the jack equivalent member 28
8b abuts on the terminals 11e, 1 of the jack sensor 10.
It is determined whether or not a short circuit has occurred between 1f (first sensor ON) (S110). That is, when the ON signal is input to the control device 12 from the jack sensor 10 within a predetermined time after the ON signal is input to the control device 12 from the jack tail sensor 9, the contact of the side surface 28 b of the jack equivalent member 28 is performed. It is determined that it is detected, that is, it is the timing corresponding to the string striking. The predetermined time is set to be slightly longer than the time from when the jack tail sensor 9 is turned on to when the jack sensor 10 is turned on, which can be obtained when the key is pressed normally.

Therefore, in step S110, if the ON signal from the jack sensor 10 is not detected within the predetermined time (NO in step S110), the process is terminated as it is, and one of the jack tail sensors 9 is turned on again. Wait for it. On the other hand, when the ON signal of jack sensor 10 is detected within a predetermined time in S110, it is determined that a valid operation of jack equivalent member 28 is detected (YES in step S110), and input / output port 52 or RAM is not detected.
A time difference ΔT between the timing of inputting the ON signal of the jack tail sensor 9 and the timing of inputting the ON signal of the jack sensor 10 stored in 58 is determined, and the contact strength (strike strength) is determined from the time difference ΔT. Is calculated by, for example, the following equation (S120).

[0041]

(Equation 1)

Here, K is a constant. Then, based on the position of the jack tail sensor 9 (or the jack sensor 10) in the sound range and the contact strength P, the frequency and the amplitude are determined to obtain a predetermined waveform signal, and the electronic signal is obtained based on the waveform signal. The sound source 14 is controlled, and the sound is generated from the speaker 16 at the calculated sound generation timing (S130).

Thereafter, the key release sensor 8 at the same position on the tone range
Waits for detection of a key release (S140). That is,
When the signal from the key release sensor 8 switches from off to on, it is determined that a key release has been detected (Y in step S140).
ES), the sound generation from the electronic sound source 14 is stopped (S15).
0), the process is temporarily terminated. Thereafter, each time the jack tail sensor 9 is turned on, the processing of FIG. 5 is repeated. If a plurality of keys are pressed, the processing in FIG. 5 is executed in parallel according to the number of keys pressed.

The upright type electronic piano 2 of the present embodiment has the following effects. . The bat equivalent member 34 is a hammer shank equivalent member 3.
Since it is integrated with the hammer-equivalent member 42 through 6, the jack-equivalent member 28 applies kinetic energy to the hammer-equivalent member 42. The state in which the tip of the hammer equivalent member 42 collides with the hammer stopper 45 with the kinetic energy is the same as the state in which the hammer strikes a string in an acoustic piano. From this, the jack tail sensor 9 before and after the moment when the kinetic energy is given to the hammer equivalent member 42 is obtained.
Timing of the jack-tail-equivalent member 28a with respect to the jack-equivalent member 28 with respect to the jack sensor 10.
The contact timing of the side surface 28b is data reflecting the timing of striking and the striking strength of the acoustic piano.

Accordingly, the sound intensity (volume) is detected from the time difference between the detection timing of the jack tail sensor 9 and the detection timing of the jack sensor 10, and the jack equivalent member 28 is detected from the detection timing of the jack sensor 10.
The contact timing is detected and the control unit 12 calculates an appropriate sounding timing and sounding intensity (volume) based on this detection to control sounding. Can be obtained.

Further, as shown in FIG. 7, the jack tail sensor 9 generates a peak resistance force generated when the bat-equivalent member 34 interlocked with the hammer-equivalent member 42 separates (let-off) from the jack-equivalent member 28. The timing at which the jack-tail-equivalent member 28a reaches the second predetermined position S2 in the area A where the resistance is flat is detected. Further, the jack sensor 10 has a flat resistance B after the peak resistance generated when the bat-equivalent member 34 interlocked with the hammer-equivalent member 42 separates (let-off) from the jack-equivalent member 28. The timing at which the side surface 28b of the jack-equivalent member 28 reaches the first predetermined position S1 in FIG.

As described above, the detection positions of the jack tail sensor 9 and the jack sensor 10 are not included in the let-off resistance peak. For this reason, in any of the keys 6, the detection timing of the jack tail sensor 9 and the jack sensor 10 and the time difference between the timing and the key pressing speed of the player, or the timing corresponding to the string striking and the strength of the string striking always occur. As data reflecting the accuracy accurately, it can be obtained stably and accurately. That is, the data corresponding to the string striking timing and the string striking strength can be obtained with high accuracy in a stable state at all keys 6.

Therefore, the upright type electronic piano 2
In, the control of the sounding timing and the sounding intensity (volume) faithfully reflecting the keyboard operation of the player can always be performed stably and with high accuracy, and the touch response does not become unstable. Moreover, as shown in FIG. 7, the position S1 of the jack sensor 10 is arranged at a position where the keyboard stroke is deeper than the let-off. In other words, since it is sufficiently close to the keyboard stroke limit L, it is arranged close to the keyboard stroke D corresponding to the actual string striking position of the acoustic piano, so the timing corresponding to the string striking is predicted from the detection timing of the jack sensor 10. However, errors can be suppressed.

Since only the second predetermined position is set in a region where the keyboard stroke is shallower than the let-off resistance peak, the jack tail sensor 9 can sufficiently approach the let-off resistance peak, and Is performed with a relatively small keyboard stroke width on the deep keyboard stroke side as in repeated tapping, the detection can be sufficiently performed by the jack tail sensor 9 and the jack sensor 10, and the sound generation is not interrupted.

In the let-off position, only the first predetermined position S1 exists on the side where the keyboard stroke is deep.
Since the let-off can be arranged sufficiently on the deep side of the keyboard stroke, the touch-off of an acoustic piano can be brought closer. Further, since the key release sensor 8 detects the timing at which the keyboard 6 is released, the control device 12 can also obtain a reliable sound stop timing. The position on the keyboard stroke at this key release timing is
Whether it is deeper or shallower than the let-off, the let-off resistance peak should be avoided. When detecting the key release timing deeper than the let-off, the key release timing is set at least shallower than the position S1 of the first sensor.

As described above, the jack tail sensor 9 detects the contact timing with the jack tail equivalent member 28a, the jack sensor 10 detects the contact timing with the side surface 28b of the jack equivalent member 28, and the key release sensor 8 By detecting the timing at which a key is released, the sound generation timing, sound intensity (volume) and sound stop timing can be reliably and stably obtained in a state equivalent to an acoustic piano, and the touch response is also acoustic. It can be equivalent to a piano.

[0052] The jack tail sensor 9 is formed of a rubber switch, and also serves as a jack tail stopper felt member of the jack tail equivalent member 28a, and the rubber material serves as a cushioning material.
0 is a rubber switch,
Since the rubber material also functions as a cushioning material on the side surface 28b of the side surface 28b, generation of abnormal noise is particularly small, and a jack tail stopper felt equivalent member and a jack stopper felt equivalent member need to be specially provided. There is no.

[0053] The wippen equivalent member 26, the jack equivalent member 28, and the bat equivalent member 34 swing about their own axes, similarly to an acoustic piano. The hammer equivalent member 42 is a bat equivalent member 3.
When the jack 4 is pushed up by the jack-equivalent member 28, the swing starts, and then the jack-equivalent member 28 moves away from the bat-equivalent member 34 to perform an inertial motion. 45 is stopped. For this reason, a complex touch feeling similar to that of an acoustic piano can be obtained despite being an electronic piano.

[0054] At first glance, the appearance of the internal action part was the same as an acoustic piano,
It has a solid feeling and beauty as an interior. . Since there is no need to stretch the strings, weight members such as frames and columns are not required as compared with an acoustic piano, and a damper is not required, so that the weight and cost can be reduced.

[Others] In the above-described embodiment, an optical sensor is used as the key release sensor 8, but a rubber switch may be used like the jack tail sensor 9 and the jack sensor 10. Although the rubber switch is used for the jack tail sensor 9 and the jack sensor 10, an optical sensor like the key release sensor 8 may be used.

Further, instead of the key release sensor 8, the jack tail sensor 9 or the jack sensor 10, a metal spring 70 can be used as a so-called leaf switch as shown in FIG. That is, the spring 70 is curved, and the intermediate portion 70a is in a protruding state. A base end 70b of the spring 70 is connected to the terminal 76 in an energized state. The tip 70c of the spring 70 is directed toward the terminal 78. Therefore, the keyboard 6, the jack tail equivalent member 28a or the side surface 28b of the jack equivalent member 28
Pushes down the intermediate portion 70a of the spring 70,
When 0 is distorted by a predetermined amount, the tip 70c of the spring 70 contacts the terminal 78.

Since the terminals 76 and 78 are short-circuited by the key pressing operation, the collision timing can be detected as in the case of the rubber switch shown in FIG.
The spring 70 is the keyboard 6, the jack tail equivalent member 28a.
Alternatively, rubber bumpers 82 are disposed on both sides or around the spring 70 in order to prevent it from being completely crushed by the side surface 28b of the jack equivalent member 28, and the keyboard 6, the jack tail equivalent member 28a or the jack equivalent member 2
When the side surface 28b of the collides with the cushioning member 82, the spring 70 is prevented from being crushed any more.

In addition, the key release sensor 8, the jack tail sensor 9, or the jack sensor 10 can be constituted by using a pressure sensor or the like, and any of these sensors may be used. Although the upright type electronic piano is used in the above embodiment, the configurations of the keyboard device and the electronic piano of the electronic musical instrument according to the present invention can be similarly applied to the grand piano type.

In the above-described embodiment, the operation of the keyboard 6 is directly detected in order to obtain the key release timing. However, if the operation of the keyboard 6 is understood as an accessory, the operation of the accessory of the keyboard 6 is performed. May be detected to detect the key release timing. Further, without providing the key release sensor 8 in particular, for example, the timing at which the jack tail sensor 9 changes from on to off may be detected as the key release timing. That is, the jack tail sensor 9 may also serve as the key release sensor 8. The jack sensor 10 may also serve as the key release sensor 8.

In the jack tail sensor 9 or the jack sensor 10, the second predetermined position or the first
As long as the detection timing of the predetermined position is known, the arrival of any position of the jack equivalent member 28 may be detected.

[Brief description of the drawings]

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

FIG. 2 is a configuration explanatory view of an action load simulation member according to the embodiment.

FIG. 3 is a perspective view of the upright type electronic piano of the embodiment as viewed from the back.

FIG. 4 is a schematic longitudinal sectional view of the upright type electronic piano of the embodiment.

FIG. 5 is a flowchart of a sound generation process performed by the control device according to the embodiment;

6A and 6B are explanatory diagrams of the jack sensor and the jack tail sensor according to the embodiment, wherein FIG. 6A is a cross-sectional view thereof, and FIG. 6B is an explanatory diagram of a short-circuit state of terminals.

FIG. 7 is a graph for explaining the correspondence between a keyboard stroke and a sensor detection position.

FIG. 8 is a diagram illustrating the configuration of a leaf switch that can be used in place of a rubber switch of a key release sensor, a jack sensor, or a jack tail sensor.

FIG. 9 is an explanatory diagram of a conventional keyboard.

FIG. 10 is an explanatory diagram of a conventional keyboard.

[Explanation of symbols]

2 ... upright type electronic piano 4 ... action load simulation member 6 ... keyboard 8 ... key release sensor 9 ... jack tail sensor 10 ... jack sensor 12 ... control device 14 ... electronic sound source 16 ... speaker 26 ... wippen equivalent member 28 ... jack equivalent Member 28a: Jack tail equivalent member 28b: Side surface 34: Bat equivalent member 36: Hammer shank equivalent member 42: Hammer equivalent member 45 ... Hammer stopper 50 ... Shutter 52
... I / O port 54 ... CPU

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 1/34 G10B 3/12 G10C 3/16 G10H 1/053

Claims (7)

(57) [Claims] 1. A keyboard device for an electronic musical instrument for applying a load simulating an action to a keyboard, comprising: a whippen-equivalent member that is swingably supported and swings as the keyboard swings when a key is pressed. A jack-equivalent member that is swingably attached to the whippen-equivalent member and rises as the whippen-equivalent member is swung by a key-press operation, and is pushed up by the jack-equivalent member while the jack-equivalent member is raised to a predetermined position. Rocks,
After the jack-equivalent member rises to a predetermined position, the hammer-equivalent member separates from the jack-equivalent member and moves by inertia.
And an action load simulating member having a stopper that collides with the tip of the hammer-equivalent member that is in an inertial motion to prevent the operation of the hammer-equivalent member; and a peak generated when the hammer-equivalent member separates from the jack-equivalent member. A first sensor that detects a timing at which any one of the action load simulating members reaches a first predetermined position after a strong resistance is generated on the keyboard; and a member corresponding to the hammer separates from the member corresponding to the jack. before the peak resistive force generated when occurs the keyboard, and a second sensor for detecting a timing at which any one of members of the action load simulation member came second predetermined position, the hammer equivalent member Is separated from the jack equivalent member
Before the peak resistance that occurs when
And after the occurrence, their resistance is almost constant
A region having a peak resistance is provided in the region.
The second predetermined position is set in an area before the drag occurs on the keyboard.
After the peak resistance has occurred on the keyboard
A keyboard device for an electronic musical instrument , wherein the first predetermined position is set in an area . 2. An action load simulating member to be detected by the first sensor is any one of the keyboard, the whippen equivalent member, the jack equivalent member, and their attached members. A keyboard device for an electronic musical instrument according to claim 1. 3. An action load simulating member to be detected by the second sensor is any one of the keyboard, the whippen equivalent member, the jack equivalent member, and an accessory member thereof. A keyboard device for an electronic musical instrument according to claim 1. 4. A further, especially further comprising a third sensor for detecting a key release timing
The keyboard of an electronic musical instrument according to any one of claims 1 to 3, wherein
apparatus. 5. The keyboard according to claim 3, wherein the third sensor is configured to control the keyboard and the wick.
A pen equivalent member or the jack equivalent member, or
Key release timing is detected from any of these attached members
5. The keyboard of an electronic musical instrument according to claim 4, wherein
Place. 6. The second sensor also serves as a third sensor.
The keyboard arrangement of an electronic musical instrument according to claim 4 or 5, wherein
Place. 7. An electronic musical instrument according to claim 4,
A keyboard device and a sound generator based on the timing detected by the first sensor.
Controls the timing and the timing and the second sensor.
Controls the sound intensity based on the time difference from the detected timing
The key release timing detected by the third sensor.
Electronic sound generation control means for controlling the timing of stopping sound based on the sound
And an electronic piano comprising: