JP2902336B2 - 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. 10, a hammer arm P14 which is swingable about an axis P10 and presses the rear end of the keyboard P12 from above.
11 and a hammer arm P20 that can swing about an axis P16 and lifts the tip of the keyboard P18 by pressing the keyboard P18 from below. (Japanese Patent Laid-Open No. 4-347)
No. 895). The action load simulating members shown in FIGS. 10 and 11 have both been developed with the aim of bringing the piano closer to an acoustic piano as much as possible in consideration of an electronic piano having a low roof.

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, FIG. 10 and FIG.
In a keyboard equipped with an action load simulating member as shown in (1), the weight swings around one axis.
There was a problem that the touch feeling of the keyboard became 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.

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). It has been found that the force affects the stability of detection from the action load simulating member, and the present invention has been completed.

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, it aims to realize a keyboard device for an electronic musical instrument that can stably detect the timing and strength corresponding to the striking and an electronic piano using the keyboard device. It is.

[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 any one of the action load simulating members before a peak resistance force generated on a keyboard when the hammer equivalent member separates (let-off) from the jack equivalent member. The timing at which the member reaches the first predetermined position is detected. Further, the second sensor is located before a peak resistance force generated on a keyboard when the hammer-equivalent member is separated from the jack-equivalent member, and the timing is detected by the first sensor. Previously, the timing at which any of the action load simulating members has reached the second predetermined position is detected.

As described above, both the detection of the first sensor and the detection of the second sensor are more likely than the generation of a peak resistance force generated on the keyboard when the hammer-equivalent member is separated (let-off) from the jack-equivalent member. It is detected before, that is, before the peak of the resistance that the keyboard receives at the time of let-off.

Before the peak of the let-off resistance, during the peak of the let-off resistance, and after the peak of the let-off, even if the key is pressed with the same force, the change in the resistance received by the keyboard from the member corresponding to the hammer. Therefore, even if the positions of the first and second sensors are slightly different, the detection timing may be different. In particular, since the difference in resistance between positions in the let-off resistance peak is large compared to the other states, if the detection position of one sensor is included in this let-off resistance peak,
Variations in volume and sound generation timing occur depending on the keyboard.

If the keyboard stroke position is before the let-off resistance peak, there is almost no change in resistance and the state is flat. When the damper is not used in the action load simulation member, the change in the resistance force is particularly small before the peak of the let-off.

The first sensor and the second sensor are located at positions corresponding to a keyboard stroke position before the peak of the let-off resistance (first predetermined position and second predetermined position).
Since the timing at which any of the action load simulating members arrives is detected, the time difference between the detection timings is stable with little variation among the keys, and the timing equivalent to the striking with high accuracy is achieved. And data corresponding to the intensity (volume).

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

The action load simulating member to be detected by the first sensor or the second sensor may be the keyboard, the whippen-equivalent member or the jack-equivalent member, or an accessory member thereof. . Further, as an accessory member of the jack equivalent member, for example, a jack tail equivalent member of the jack equivalent member can be mentioned.

Further, a third sensor for detecting a key release timing can be provided. This third sensor, for example,
From the keyboard, the whippen equivalent member or the jack equivalent member, or any of these attached members,
Detect key release timing. 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 uses
The sounding timing is controlled based on the timing detected by the first sensor, and the sound intensity (volume) is controlled based on the time difference between this timing and the timing detected by the second sensor, and detected by the third sensor. By controlling the sound stop timing based on the key release timing thus performed, it is possible to perform with the same touch feeling and touch response as in the case of acoustics in a stable state.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] As shown in the schematic block diagram of FIG. 1, an upright type electronic piano 2 according to Embodiment 1 has the same number of action load simulating members 4, keyboards 6, and third sensors as the number of keyboards 6. , A jack-tail sensor 10 as the first and second sensors of the same number as the number of keyboards 6, 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 and the jack tail sensor 10
It is 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 that rises with the whippen-equivalent member 26 until it comes into contact with the equivalent member 30, and a center of a butt flange-equivalent member 32 a that is in contact with and separates from the jack equivalent member 28 and is fixed to the center rail equivalent member 24. A bat-equivalent member 34 swingably supported by the pin-equivalent member 32b;
And the bat equivalent member 34 is connected to the jack equivalent member 2
8, a hammer shank equivalent member 36 that swings in a direction opposite to the swing direction of the keyboard 6, and a catcher shank projecting from the bat equivalent member 34 so as to project in a direction orthogonal to the hammer shank equivalent member 36. The equivalent member 38, the catcher equivalent member 40 attached to the tip of the catcher shank equivalent member 38, and the hammer equivalent member 4 attached to the tip of the hammer shank equivalent member 36
2 and a member equivalent to a hammer shank that has rocked back after pressing a key 3
6, a hammer rail-equivalent member 4 fitted with an abutment portion 44a that abuts on the side of the hammer-equivalent member 42 to reduce vibration of the hammer-equivalent member 42.
4 is provided.

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. A jack tail sensor 10 is provided at the lower end of the regulating button equivalent member 30 so as to face the jack tail equivalent member 28a. The jack tail sensor 10 also serves as a member equivalent to a jack tail stopper felt, and is provided at a position where it can come into contact with the jack tail equivalent member 28a when a key is pressed. The contact position with the jack tail equivalent member 28a is adjusted by moving the regulating button equivalent member 30 up and down by the rotation of the adjusting screw 30a screwed to the regulating rail 31a. The regulating button equivalent member 30 is rotatable with respect to the adjusting screw 30 a, but the regulating rail 3 fixed to the tip of the regulating bracket 31.
By the guide 31b of 1a, the vertical position can be adjusted without rotating the regulating button equivalent member 30. A jack stopper felt-equivalent member 31c is provided on the opposite side of the guide 31b to prevent the generation of abnormal noise when the jack equivalent member 28 abuts.

The jack-equivalent member 28 pushes up the bat-equivalent member 34 by the 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.
, The bat-equivalent member 34 separates from the jack-equivalent member 28, that is, is let-off, and the hammer-equivalent member 42 collides with the hammer stopper felt 45 a as a cushioning material of the hammer stopper 45 due to inertial motion. Swing counterclockwise until:

The jack tail sensor 10 is in contact with the jack tail equivalent member 28a of the jack equivalent member 28 before leaving the bat equivalent member 34, and serves as a jack tail stopper felt equivalent member. The jack tail sensor 10 is a rubber hollow body, and is configured such that when the jack tail equivalent member 28a abuts, it is easily crushed and the inner conductive surface connects the inner terminal.

FIG. 6A shows an example of the jack tail sensor 10. From the rubber head 11a of the jack tail sensor 10, 2
The two plate-shaped protrusions 11b and 11c project with different protrusion amounts from each other, and a bottom plate 11d inside the jack tail sensor 10.
On the upper side, three terminals 11e, 11f and 11g are provided.

When the key is depressed, the jack equivalent member 2
8, when the side wall 11h is crushed by a predetermined amount, the first conductive surface 11i at the tip of the plate-like protrusion 11b having the larger protrusion amount.
Short-circuits the terminals 11e and 11f. That is, the plate-shaped protrusion 11b, the first conductive surface 11i, and the terminals 11e, 11f
Is turned on. Furthermore, the side wall 1
When 1h is crushed, the second conductive surface 11j at the tip of the plate-shaped protrusion 11c having the smaller protrusion amount is connected to the terminals 11f and 11g.
Short circuit. That is, the first sensor including the plate-shaped protrusion 11c, the second conductive surface 11j, and the terminals 11f and 11g is turned on.

As a result, the control device 12
The contact timing of the jack-equivalent member 28 can be detected by detecting the change in the impedance between the signal lines 11m and 11n shown in (b), and the detection timing of the impedance change between the signal lines 11k and 11m and the signal lines 11m and 11m.
The contact strength (contact speed) can be detected from the time difference from the detection timing of the impedance change between n.

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.

Therefore, 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 device 12 includes an input / output port 52, a well-known CPU 54, a ROM 56, a RAM
58, a backup RAM 60, a clock 62, and the like.
Connected by The controller 12 is connected to the key release sensor 8 and the jack tail sensor 10 via an input / output port 52, and is also connected to the electronic sound source 14 via the input / output port 52.

The CPU 54 has a jack tail sensor 10
, The terminal connection timing of the second conductive surface 11j and the time difference between the terminal connection timings of the conductive surfaces 11i and 11j, and also the timing at which the signal of the key release sensor 8 switches from off to on. A signal is output to the electronic sound source 14 based on the detection data and the control program stored in the ROM 56. 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 10 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 then separates (let-off) from the bat equivalent member 34. Therefore, the bat-equivalent member 34 after the jack-equivalent member 28 is separated performs an inertial motion together with the hammer shank-equivalent member 36 and the hammer-equivalent member 42. The jack-equivalent member 28 comes into contact with the jack stopper felt-equivalent member 31c on its side surface 28b and stops. The tip of the hammer-equivalent member 42 collides with the hammer stopper 45, and its operation is prevented.

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 processing is performed when the first conductive surface 11i of the jack tail sensor 10 is short-circuited between the terminals 11e and 11f (hereinafter, referred to as “ON”), that is, the second
This is an interrupt process started when the sensor is turned on. When this processing is started, first, within a predetermined time after the first conductive surface 11i of the jack tail sensor 10 is turned on (the second sensor is turned on) by the contact of the jack tail member 28a with the jack tail equivalent member 28a, It is determined whether or not the second conductive surface 11j is turned on (first sensor is turned on) (S110). That is, the first of the jack tail sensor 10
When an ON signal is input to the control device 12 from the second conductive surface 11j of the jack tail sensor 10 within a predetermined time after an ON signal is input to the control device 12 from the conductive surface 11i, the contact of the jack tail equivalent member 28a is performed. It is determined that the contact has been detected, that is, it is the timing corresponding to the striking. The predetermined time is set to be slightly longer than the time from when the first conductive surface 11i is turned on to when the second conductive surface 11j is turned on, which can be obtained when the key is pressed normally.

Therefore, in step S110, the second conductive surface 11j of the jack tail sensor 10 is set within a predetermined time.
If the ON signal is not detected (NO in step S110), the process is terminated as it is, and the control waits until the first conductive surface 11i of any of the jack tail sensors 10 is turned on again.

On the other hand, if the ON signal of second conductive surface 11j is detected within a predetermined time in S110, it is determined that a valid operation of jack tail equivalent member 28a is detected (YES in step S110), and input / output is performed. Port 52 or R
The time difference ΔT between the timing of inputting the ON signal of the first conductive surface 11i of the jack tail sensor 10 stored in the AM 58 and the timing of inputting the ON signal of the second conductive surface 11j is determined, and the time difference ΔT is used to determine the time difference ΔT. The contact strength (corresponding to the striking strength) P is calculated by, for example, the following equation (S1).
20).

[0038]

(Equation 1)

Here, K is a constant. Then, based on the position of the jack tail sensor 10 on the sound range and the contact strength P, the frequency and the amplitude are determined to obtain a predetermined waveform signal,
The electronic sound source 14 is controlled on the basis of the waveform signal and sound is emitted from the speaker 16 (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 first conductive surface 11i of the jack tail sensor 10 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 electronic piano 2 of the first 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 contact timing and contact strength of the jack tail equivalent member 28a of the jack equivalent member 28 that gives the kinetic energy to the hammer equivalent member 42 correspond to the timing and strength of string striking in an acoustic piano. Data.

Therefore, the jack tail sensor 10 detects the contact timing and the contact strength of the jack-equivalent member 28, and based on the detection, the control device 12 causes the control unit 12 to generate an appropriate sounding timing and sounding intensity (volume). Is calculated and the sound generation is controlled, whereby the same touch response as that of an acoustic piano can be obtained in a key pressing operation.

Further, as shown in FIG. 7, the second sensor and the first sensor of the jack tail sensor 10 are used when the bat-equivalent member 34 interlocking with the hammer-equivalent member 42 separates (let-off) from the jack-equivalent member 28. Before the occurrence of the generated peak resistance, the timing at which the jack tail equivalent member 28a, which is a part of the jack equivalent member 28 of the action load simulating member 4, comes to the lower end of the regulating button equivalent member 30 is detected. ing. As shown in FIG. 6A, the first sensor and the second sensor have a longer plate-like protrusion 11b for the second sensor than a plate-like protrusion 11c for the first sensor. Also, as shown by positions S1 and S2 in FIG. 7, the second sensor is turned on first at the keyboard stroke position S2, and thereafter, the first sensor is turned on at the keyboard stroke position S1. afterwards,
Load peak at the time of let-off occurs.

As described above, both the detection by the first sensor and the detection by the second sensor are detected before the peak resistance generated at the time of let-off occurs. That is, the detection positions of the first sensor and the second sensor are not included in the let-off resistance peak.

For this reason, the first key of any keyboard 6
As for the time difference between the detection timings of the sensor and the second sensor, data that accurately reflects the key-pressing speed of the player is always obtained stably and with high accuracy. That is, data corresponding to 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 sound intensity (volume) faithfully reflecting the keyboard operation of the player can always be performed stably with high accuracy, and the touch response does not become unstable. The timing corresponding to the hammering is determined by the hammer equivalent member 4.
2 is the timing of collision with the hammer stopper 45, and the collision timing is the keyboard stroke position D which is deeper than the keyboard stroke limit L as shown in FIG.
It is in. However, since the first and second sensors always detect the keyboard stroke position stably and accurately for all keys 6, the timing at which the hammer equivalent member 42 reaches the keyboard stroke position D and collides with it is determined by the position S1. , S
The distance between the positions D2 and D and the distance between the positions S1 and S2 are determined based on the time when the jack tail equivalent member 28a has moved.
Since it is possible to accurately predict, the timing corresponding to the string striking can be stably and accurately obtained for all keys 6, and the sounding timing can always be stably and accurately performed. In this case, the touch response does not become unstable.

Such an effect occurs when the positions S1 and S2 are both in the keyboard stroke area A1 which is shallower than the let-off load peak, as shown in the figure. A
2 is preferable in order to perform more stable detection.

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. As described above, the jack tail sensor 10 is a member equivalent to the jack 28.
The key release sensor 8 detects the timing at which the keyboard is released by detecting the contact timing and the strength of the contact with the jack tail equivalent member 28a.
The pronunciation intensity (volume) and the sound stop timing can be reliably and stably obtained in a state corresponding to an acoustic piano, and the touch response can be made equivalent to that of an acoustic piano.

[0049] Since the jack tail sensor 10 is formed of a rubber switch, and also serves as a member corresponding to the jack tail stopper felt of the member equivalent to the jack tail 28a, the rubber material serves as a cushioning material. There is no need to specially provide a member equivalent to a stopper felt.

[0050] 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. Since the 45 is stopped, let-off timing is the same as that of a normal acoustic piano. For this reason, a complex touch feeling similar to that of an acoustic piano can be obtained despite being an electronic piano.

Particularly, as shown in FIG. 7, the position detected by the jack tail sensor 10 is shallower than the let-off, so that the let-off can be set to the deepest possible keyboard stroke. For example, as shown by a dashed line in FIG. This approach is more preferable because it is closer to the touch feeling of an acoustic piano.

[0052] 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.

[Second Embodiment] In the second embodiment, as shown in FIG. 8, unlike the first embodiment, the jack tail sensor 10 does not exist, and the witpen for detecting the swing state of the whippen equivalent member 26 is not provided. A pen sensor 66 is provided. The other configuration is the same as that of the first embodiment, and the detailed description is omitted.

The whippen sensor 66 comprises a rubber switch similar to the jack tail sensor 10. When the player depresses the keyboard 6, the keyboard 6 is pushed up by the capstan screw equivalent member 20, and the wippen equivalent member 26 swings counterclockwise. As a result, the side opposite to the portion pushed up by the capstan screw-equivalent member 20 is lowered in accordance with the depression of the keyboard 6 as shown by a two-dot chain line, and crushes the wippen sensor 66. As a result, the second sensor of the wippen sensor 66 turns on, and then the first sensor turns on. The ON timing of the first and second sensors is determined by the jack tail sensor 10 shown in FIG.
Are arranged in the area A2 in the same manner as in the above case.

Therefore, the same effect as that of the first embodiment is obtained except that the member equivalent to the jack tail stopper felt 30b is required. It should be noted that the wippen sensor 66 has almost no repulsive force even when it is crushed, and thus has little effect on the touch feeling of the keyboard 6. [Others] In the first and second embodiments, the optical sensor is used as the key release sensor 8, but a rubber switch may be used like the jack tail sensor 10 and the wippen sensor 66. However, the rubber switch here has a configuration in which the conductive surface of one plate-shaped protrusion short-circuits a set of terminals.

Although the rubber switch is used for the jack tail sensor 10 or the wippen sensor 66, an optical sensor may be used like the key release sensor 8. In this case, a stepped shutter is provided on the side of the jack tail-equivalent member 28a or the whippen-equivalent member 26, and the jack tail sensor 10 or the whippen sensor 66 is used as two photointerrupters, so that one of the shutter stages of the stepped shutter can be used. The keyboard stroke positions S1 and S1 are determined based on the timing at which light is interrupted by one of the photo interrupters.
2 is detected.

Further, instead of the jack tail sensor 10 or the wippen sensor 66, a so-called leaf switch can be realized by a metal spring 70 as shown in FIG. That is, the spring 70 has two arms 72 and 74 at the distal end, and the base end is connected to the terminal 76 in an energized state. Therefore, 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 72a of the longer arm 72 of the arms 72 and 74 of the spring 70 comes into contact with the terminal 78, and when the spring 70 is further distorted by a predetermined amount, the tip 74a of another arm 74 of the spring 70. Contacts the terminal 80.

As a result, first, the terminals 76 and 7
8 is short-circuited, and then the terminals 76 and 80 are short-circuited, so that the jack tail sensor 1 shown in FIG.
As in the case of 0, the timing at which the members reach the keyboard stroke positions S1 and S2 can be detected. In addition, the spring 70 is the member equivalent to the jack tail 28a or the member equivalent to the wippen 2.
In order to prevent the spring 70 from being completely crushed, rubber cushions 82 are arranged on both sides or around the spring 70,
Jack tail equivalent member 28a and wippen equivalent member 2
When the cushion 6 comes into contact 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 10, or the whippen sensor 66 can be constituted by using a pressure sensor or the like, and any of these sensors may be used. The jack tail sensor 10 and the whippen sensor 66 described above serve both as the first sensor and the second sensor. However, if the conditions of the keyboard stroke positions S1 and S2 shallower than the let-off shown in FIG. First
The sensor and the second sensor may be provided separately. Also the first
The position of another member may be detected by the sensor and the second sensor.

In the first and second embodiments, the upright type electronic piano is used. However, the configuration of the keyboard device and the electronic piano of the electronic musical instrument of the present invention can be similarly applied to the grand piano type. In the first and second embodiments, 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, the operation of the accessory of the keyboard 6 is performed. May be detected to detect the key release timing.

Even if the key release sensor 8 is not specially provided, for example, the timing at which the first sensor or the second sensor of the jack tail sensor 10 or the whippen sensor 66 is turned off from on is detected as the key release timing. May be. In other words, the key release sensor 8 may be used as the jack tail sensor 10 or the wippen sensor 66.

Further, the jack tail sensor 10
Has detected the movement of the jack-tail equivalent member 28a, but may be any other accessory than the jack-tail equivalent member 28a as long as it is an accessory that allows the operation of the jack equivalent member 28 to be understood. What is necessary is just to detect the operation of the jack equivalent member 28 by detecting it.

The whippen sensor 66 directly detects the operation of the wippen equivalent member 26. However, if the whippen equivalent member 26 is an accessory that can be understood, the accessory of the whippen equivalent member 26, for example, The operation of the whippen equivalent member 26 may be detected by detecting the operation of the catcher equivalent member 26a and the like.

[Brief description of the drawings]

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

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

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

FIG. 4 is a schematic longitudinal sectional view of the upright electronic piano according to the first embodiment.

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

6A and 6B are explanatory diagrams of the jack tail sensor according to the first 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 configuration explanatory view of an action load simulation member according to the second embodiment.

FIG. 9 is an explanatory diagram of a configuration of a leaf switch that can be used in place of the rubber switch of the jack tail sensor.

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

FIG. 11 is an explanatory view of a conventional keyboard.

[Explanation of symbols]

2 ... Upright type electronic piano 4 ... Action load simulation member 6 ... Keyboard 8 ... Key release sensor 10 ... Jack tail sensor 11a ... Head 11b, 11c ... Plate-shaped protrusion 11
d: bottom plate 11e, 11f, 11g: terminal 11h: side wall 1
1i 1st conductive surface 11j 2nd conductive surface 12 ... control device 14 ... electronic sound source 16 ... speaker 20 ... capstan screw equivalent member 22 ... wippen range equivalent member 26 ... wippen equivalent member 28 ... jack equivalent member 28a ... jack Tail equivalent member 30 ... Regulating button equivalent member 30a ...
Adjustment screw 30b: Jack tail stopper felt equivalent member 31c: Jack stopper felt equivalent member 34: Butt equivalent member 36 ... Hammer shank equivalent member 42 ... Hammer equivalent member 45 ... Hammer stopper 50 ... Shutter 52 ... Input / output port 54 ... CP
U 66: Whippen sensor 70: Spring 72, 74
... Arms 72a, 74a ... Tip 76, 78, 80 ... Terminal

Claims (9)

(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 of the action load simulating members reaches a first predetermined position before a strong resistance force is generated on a keyboard; and a hammer-equivalent member is a jack-equivalent member. Any one of the action load simulating members may be moved to the second predetermined position before the peak resistance generated at the time of separation is generated on the keyboard and before the timing is detected by the first sensor. 2. A keyboard device for an electronic musical instrument, comprising: a second sensor that detects a timing at which the electronic musical instrument has arrived. 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. The keyboard for an electronic musical instrument according to claim 1, wherein any one of the action load simulating members to be detected by the first sensor is a jack tail equivalent member of the jack equivalent member. apparatus. 4. 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. Claim 1
4. A keyboard device for an electronic musical instrument according to any one of the above items 3. 5. The device according to claim 1, wherein one of the action load simulating members to be detected by the second sensor is a jack tail-equivalent member of the jack-equivalent member. Electronic musical instrument keyboard device. 6. A system according to claim 1, further comprising a third sensor for detecting a key release timing.
6. The keyboard device for an electronic musical instrument according to any one of claims 5 to 5. 7. The keyboard device for an electronic musical instrument according to claim 6, wherein the third sensor detects a key release timing from the keyboard, the whippen equivalent member, the jack equivalent member, or any of these attached members. . 8. The keyboard device for an electronic musical instrument according to claim 6, wherein said second sensor also serves as a third sensor. 9. A keyboard device for an electronic musical instrument according to claim 6, wherein a tone generation timing is controlled based on a timing detected by said first sensor, and said timing is detected by said second sensor. Electronic sound generation control means for controlling the intensity of sound generation from the time difference from the timing and controlling the sound stop timing based on the key release timing detected by the third sensor. piano.