JP3188385B2 - 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). The present invention has been completed by finding that the force affects the stability of the detection from the action load simulating member, and that the position of the sensor with respect to its let-off affects the continuous hitting property.

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 making the touch response almost the same as that of an acoustic piano, we used a keyboard device for an electronic musical instrument that can detect timing and strength corresponding to striking strings in a particularly stable manner and that does not cause a problem with repeated tapping. The purpose is to realize an electronic piano.

[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. Further, the second sensor is provided after a peak resistance force generated when the hammer-equivalent member separates from the jack-equivalent member is generated on the keyboard and before the timing by the first sensor is detected. The timing at which any one of the action load simulation members reaches a second predetermined position (for example, S2 described later) is detected.

As described above, both the detection of the first sensor and the detection of the second sensor are performed after the peak resistance generated on the keyboard when the hammer equivalent member separates (let-off) from the jack equivalent member. That is, the detection is performed after the peak of the resistance applied to the keyboard 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 two sensor positions are keyboard stroke positions after the peak of the let-off resistance, the two sensors are in the same area, and the change in the resistance is such that one of the sensors falls within the let-off peak. Is less than when it exists. The first sensor and the second sensor are located at a position corresponding to a keyboard stroke position after the peak of the let-off resistance (the first predetermined position and the second predetermined position). Since the timing at which the member arrives is detected, the time difference between the detection timings is stable with little variation among the keys, and the timing corresponding to the string striking and the data corresponding to the string striking strength (volume) are accurately determined. You can get higher.

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.

Furthermore, since there is no let-off on the side where the keyboard stroke is deeper than the positions of the first and second sensors,
The first and second sensors can be arranged at positions sufficiently close to the stringing side in terms of keyboard stroke. For this reason, even in the case where key depression / key release is repeated with a small keyboard stroke on the string striking side, such as in the case of repeated hits, the sounding timing and sounding intensity can be detected, and the continuous hitting can be performed. Can be realized.

The design of the action load simulating member allows the position of the let-off to be determined as shown in FIG.
By making the keyboard stroke shallower, the flat portion (the portion where the load hardly changes) in the region deeper than the let-off is widened, and the width between the first and second sensors is sufficiently increased by the flat portion. If it is wide, a change in the keyboard stroke can be more accurately detected, so that data of a more stable sounding intensity can be obtained.

As 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.

[0021]

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. It comprises a key release sensor 8 as a sensor, jack sensors 10 as first and second sensors equal in number to the keyboard 6, a control device 12, an electronic sound source 14 and a speaker 16. Among them, the action load simulating member 4, the keyboard 6, the key release sensor 8 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 swing direction of the keyboard 6 by raising the capstan screw-equivalent member 20, and is swingably connected to the whippen-equivalent member 26. Jack tail stopper of the equivalent member 30 A jack equivalent member 28 that rises together with the whippen equivalent member 26 until it comes into contact with the felt equivalent member 30b, abuts 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 center pin equivalent member 32b of the butt flange equivalent member 32a, and a bat equivalent member 34 connected to the bat equivalent member 34 so that the bat equivalent member 34 becomes a jack equivalent member 28.
A member 36 equivalent to a hammer shank that swings in a direction opposite to the swinging direction of the keyboard 6 when pushed up by a key, and a catcher shank equivalent to a catcher shank protruded from a bat equivalent member 34 so as to project in a direction orthogonal to the member 36 equivalent to the hammer shank 36. A member 38, a catcher-equivalent member 40 attached to the tip of the catcher shank-equivalent member 38, and a hammer equivalent member 42 attached to the tip of the hammer shank-equivalent member 36
And a member 36 equivalent to a hammer shank that has swung back after pressing a key.
A hammer rail-equivalent member 44 provided with an abutment portion 44a for abutting against the side of
And

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 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.
Butt-equivalent member 34b, the butt-equivalent member 34 becomes the jack-equivalent member 2
8, ie, let-off is performed, and the inertial motion causes the hammer equivalent member 42 to move the hammer stopper felt 4 as a cushioning material of the hammer stopper 45.
It swings counterclockwise until it collides with 5a.

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. The jack sensor 10 is a rubber hollow body,
When the side surface 28b of the jack-equivalent member 28 abuts, it is easily crushed, and the inner conductive surface is connected to the inner terminal.

An example of the jack sensor 10 is shown in FIG.
(A). Rubber head 11 of jack sensor 10
a, two plate-shaped protrusions 11b and 11c project from the jack sensor 10 with different amounts of protrusion from each other, and three terminals 11b are formed on the bottom plate 11d inside the jack sensor 10.
e, 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.
Are connected by The controller 12 is connected to the key release sensor 8 and the jack 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 detects the terminal connection timing of the second conductive surface 11j in the jack sensor 10 and the time difference between the terminal connection timings of the respective conductive surfaces 11i and 11j, and further turns the signal of the key release sensor 8 from off to on. The switching timing is also detected, and a signal is output to the electronic sound source 14 based on the detected data and the control program stored in the ROM 56. In addition,
The control device 12 includes a damper pedal (not shown),
A pedal sensor for detecting the operation of a pedal mechanism such as a soft pedal is also connected, and a signal is output to the electronic sound source 14 in consideration of this detection information.

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 comes into contact with the jack-tail stopper felt-equivalent member 30b at the lower end of the regulating button-equivalent member 30. Swinging around) to separate (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 36 and the hammer-equivalent member 42
Performs inertial motion with. After being separated from the bat-equivalent member 34, the jack-equivalent member 28 abuts on the side surface 28 b of the jack sensor 10 and stops, and the hammer-equivalent member 42 is stopped.
Collides with the hammer stopper 45, and the operation of the hammer equivalent member 42 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 process is an interrupt process that is started when the terminals 11e and 11f are short-circuited by the first conductive surface 11i of the jack sensor 10 (hereinafter, referred to as “on”), that is, when the second sensor is turned on. . When this processing is started, first, the side surface 28 of the jack equivalent member 28
b, the first conductive surface 11 of the jack sensor 10
It is determined whether or not the second conductive surface 11j is turned on (first sensor on) within a predetermined time after i is turned on (second sensor on) (S110). That is, when an ON signal is input to the control device 12 from the first conductive surface 11i of the jack sensor 10 to the control device 12 within a predetermined time after an ON signal is input to the control device 12 within a predetermined time, It is determined that the contact of the side surface 28b of the jack equivalent member 28 has been detected, that is, it is determined that the timing corresponds to the string 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, unless an ON signal from second conductive surface 11j of jack sensor 10 is detected within a predetermined time (NO in step S110).
The process is terminated as it is, and the control waits until the first conductive surface 11i of one of the jack sensors 10 is turned on again.

On the other hand, if the ON signal of the second conductive surface 11j is detected within a predetermined time in S110, it is determined that an effective operation of the jack equivalent member 28 has been detected (step S1).
10; YES), input / output port 52 or RAM 58
First conductive surface 11 of jack sensor 10 stored in
i when the ON signal is input and the second conductive surface 11j
A time difference ΔT from the timing at which the ON signal is input is obtained, and the contact strength (corresponding to the string striking strength) P is calculated from the time difference ΔT by, for example, the following equation (S120).

[0038]

(Equation 1)

Here, K is a constant. Then, based on the position of the jack sensor 10 on the sound range and the contact strength P,
The frequency and the amplitude are determined to obtain a predetermined waveform signal, and the electronic sound source 14 is controlled based on the predetermined waveform signal to sound 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, the jack sensor 10
Each time the first conductive surface 11i 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 contact timing and contact strength of the jack equivalent member 28 to the jack sensor 10 immediately after giving the kinetic energy to the hammer equivalent member 42 reflect the timing of string striking and the string striking strength of the acoustic piano. Data.

Accordingly, the jack sensor 10 detects the contact timing and the contact strength of the jack-equivalent member 28, and based on this detection, the controller 12 determines the appropriate sounding timing and sounding intensity (volume). By calculating and controlling sound generation, 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 sensor 10 are generated when the bat-equivalent member 34 interlocked with the hammer-equivalent member 42 separates (let-off) from the jack-equivalent member 28. After the peak resistance is generated, the timing at which the side surface 28b of the jack equivalent member 28 reaches the position of the regulating rail 31a is detected. That is, the jack sensor 10 detects the state immediately before the jack equivalent member 28 stops after let-off. 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. FIG. 7 also shows positions S1 and S2.
As shown by, after the let-off, 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.

As described above, both the detection by the first sensor and the detection by the second sensor are detected after 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. Therefore, in any keyboard 6, the time difference between the detection timing of the first sensor and the detection timing of the second sensor can always be obtained stably and accurately with data that accurately reflects the key pressing speed of the player. That is, the data corresponding to the 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. Moreover, as shown in FIG. 7, the positions S1, S of the first and second sensors
2 is arranged at a position where the keyboard stroke is deeper than the let-off. That is, since it is sufficiently close to the keyboard stroke limit L, even if the keyboard stroke is performed with a relatively small keyboard stroke width such as repeated tapping, the detection can be sufficiently performed by the first and second sensors.
There is no interruption in pronunciation.

As can be seen from FIG. 7, the let-off is set sufficiently farther than the keyboard stroke limit L. For this reason, since the area A where the load hardly changes between the let-off and the keyboard stroke limit L can be ensured with a sufficient size, the distance between the first and second sensors can be set to a sufficient distance for accurate measurement. Can be secured.

The timing corresponding to the string striking is the timing at which the hammer-equivalent member 42 collides with the hammer stopper 45, and the collision timing is, as shown in FIG. It is in position D. Since the first sensor is close to the string striking keyboard stroke D, the timing at which the hammer equivalent member 42 reaches the keyboard stroke position D and collides is
Even if prediction is made from the detection timing of the first sensor, the error can be kept to a minimum level. Therefore, even at the tone generation timing, it can always be performed stably with high accuracy, and the touch response does not become unstable in this point as well.

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. Regardless of the position on the keyboard stroke at this key release timing, either deeper or shallower than let-off, the let-off resistance peak may be avoided. When the key release timing is detected deeper than the let-off, at least the position S of the first sensor is detected.
Set it shallower than 1.

As described above, the jack sensor 10 detects the contact timing and the contact strength with the side surface 28b of the jack equivalent member 28, and the key release sensor 8 detects the timing at which the keyboard is released. The sounding timing, sounding intensity (volume) and sound stopping 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.

[0050] Since the jack sensor 10 is constituted by a rubber switch, and also serves as a jack stopper felt equivalent member on the side surface 28b of the jack equivalent member 28, the rubber material serves as a cushioning material. There is no need to specially provide a member equivalent to felt.

[0051] 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.

[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.

[Others] In the above-described embodiment, an optical sensor is used as the key release sensor 8.
As described above, a rubber switch may be used. However, it is sufficient for the rubber switch as the key release sensor 8 to have a configuration in which the conductive surface of one plate-shaped protrusion short-circuits a pair of terminals.

Although a rubber switch is used for the jack sensor 10, an optical sensor may be used like the key release sensor 8. In this case, the side surface 28 of the jack equivalent member 28
A stepped shutter is provided on the side b, and the jack sensor 10 side is used as two photo interrupters, and the keyboard stroke positions S1 and S2 are determined by the timing of blocking light from any of the photo interrupters by any of the shutter stages of the stepped shutter. Is detected.

Also, in place of the jack sensor 10, FIG.
As described above, a so-called leaf switch can be realized by the metal spring 70. That is, the spring 70 has two arms 72 and 74 at the distal end and the terminal 76 at the proximal end.
It is electrically connected to the upper part. Therefore, when the jack-equivalent member 28 pushes down the intermediate portion 70a of the spring 70, when the spring 70 is distorted by a predetermined amount, the arms 72,
74, the tip 72a of the longer arm 72 is
When the spring 70 is further distorted by a predetermined amount, the tip 74 a of another arm 74 of the spring 70 contacts the terminal 80.

As a result, first, the terminal 76 and the terminal 7
8 is short-circuited, and then the terminals 76 and 80 are short-circuited, so that the jack-equivalent member 28 reaches the keyboard stroke positions S1 and S2 as in the case of the jack sensor 10 shown in FIG. Timing to perform the detection. still,
In order to prevent the spring 70 from being completely crushed by the side surface 28b of the jack equivalent member 28, a rubber cushioning member 82 is disposed on both sides or around the spring 70, and the side surface 28b of the jack equivalent member 28 , The spring 70 is prevented from being crushed any more.

In addition, the key release sensor 8 or the jack sensor 10 can be constituted by using a pressure sensor or the like, and any of these sensors may be used. The above-described jack sensor 10 also serves as the first sensor and the second sensor. However, if the condition shown in FIG. 7 is satisfied, that is, if the jack sensor 10 exists at the keyboard stroke positions S1 and S2 deeper than let-off, The first sensor and the second sensor may be provided separately. Further, the position of another member may be detected by the first sensor and the second sensor.

In the above embodiment, 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 above 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 known, the operation of the accessory of the keyboard 6 is detected. Therefore, the key release timing may be detected.

Further, without providing the key release sensor 8 in particular, for example, the timing at which the first sensor or the second sensor of the jack sensor 10 changes from on to off may be detected as the key release timing. That is, the first sensor or the second sensor of the jack sensor 10 may also serve as the key release sensor 8.

Although the jack sensor 10 directly detects the movement of the jack-equivalent member 28, if the operation of the jack-equivalent member 28 is known, the jack sensor 10 detects the operation of the accessory to detect the movement of the accessory. The operation of the corresponding 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 according to the embodiment. FIG. 6A is a sectional view of the jack sensor, and FIG. 6B is an explanatory diagram of a short-circuit state of a terminal.

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 a leaf switch that can be used in place of the rubber switch of the jack 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 electronic piano 4. Action load simulating member 6. Keyboard 8. Key release sensor 10. Jack sensor 11a. Head 11b, 11c. Plate-shaped protrusions 11e, 11f, 11g. Terminal 11i. 11j Second conductive surface 11k, 11m, 11n Signal line 12 Controller 14 Electronic sound source 16 Speaker 18 Balance pin 28 Jack equivalent member 28a Jack tail equivalent member 28b Side surface 42 Hammer equivalent member 45 Hammer stopper 50 Shutter 54 CPU 70 Spring 72, 74 Arm 76, 78, 80 Terminal

──────────────────────────────────────────────────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 (8)

(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. The timing at which any member of the action load simulating member comes to the second predetermined position after the peak resistance generated at the time of occurrence occurs on the keyboard and before the timing is detected by the first sensor. and a second sensor for detecting a spacing said hammer equivalent member from the jack equivalent member
After the peak resistance that occurs when playing occurs on the keyboard
An area where the resistance is substantially constant is provided.
The first predetermined position and the second predetermined position
A keyboard device for an electronic musical instrument, wherein a position is set . 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. The position of the let-off shallower the keyboard stroke.
The hammer-equivalent member to the jig.
Peak resistance generated when moving away from a jack-equivalent member
After the force is generated on the keyboard, the resistance becomes almost constant.
4. The keyboard device for an electronic musical instrument according to claim 1, wherein a region is provided . 5. The keyboard device for an electronic musical instrument according to claim 1, further comprising a third sensor for detecting a key release timing. 6. The key release timing according to claim 5, wherein the third sensor detects a key release timing from the keyboard, the whippen equivalent member, the jack equivalent member, or any of the attached members. Keyboard device for electronic musical instruments. 7. The keyboard device for an electronic musical instrument according to claim 5, wherein said second sensor also serves as a third sensor. 8. A keyboard device for an electronic musical instrument according to claim 5, wherein a sounding 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.