JP3598157B2 - Electronic musical instrument keyboard and electronic piano - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a keyboard device for an electronic musical instrument and an electronic piano including a keyboard capable of pressing a predetermined stroke depth and an action load simulating member for applying a load simulating an action to the keyboard.
[0002]
Problems to be solved by the prior art and the invention
An electronic piano emits an electronic sound from a speaker based on a player's key press / key release operation, and the sound emitted from such an electronic piano has reached a level that has not been much dissatisfied in recent years as a result of repeated improvements. ing. On the other hand, it has been pointed out that the touch feeling of the keyboard is considerably different from that of the acoustic piano, and various improvements have been made on this point.
[0003]
As such improvements have progressed, an electronic piano having an action simulating load member substantially equivalent to the action mechanism of an acoustic stick piano has been developed. As shown in FIG. 5, the action load simulating member of the electronic piano includes a wipen-equivalent member 215 that rotates as a keyboard is rotated by a key-depression operation, and a wipen-equivalent member 215 that is rotated by a key-depression operation. The ascending jack-equivalent member 217, the hammer-equivalent member 221 that is moved up by the jack-equivalent member 217 and then separates from the jack-equivalent member 217, and the hammer-equivalent member 221 that is performing inertial motion A stopper 232 is provided to stop the operation of the hammer equivalent member 221 in contact therewith. A button switch 260 for detecting key press / key release is provided below the keyboard 211. The button switch 260 has two switches inside. When a key is pressed, one switch is pressed to generate an ON signal, and then when the keyboard is further pressed to reach a stroke depth, the other switch is pressed. And emits an ON signal. The control device for controlling the electronic sound has generated string striking sound based on the signal of the two switches of the button switch to generate the string striking sound, and has stopped the sound based on the sound stopping information. According to this electronic piano, since the action mechanism is the same as that of a normal acoustic stick except that no strings are struck, the touch feeling of the piano is the same as that of an acoustic piano.
[0004]
However, since there is not a sufficient space between the reed and the keyboard in a normal acoustic stick piano, in order to mount the button switch 260 below the keyboard 211 as in the above-described electronic piano, the space between the reed 208 and the keyboard 211 must be increased. As a result, the height of the keyboard device is increased, and there is a disadvantage that the appearance of the keyboard device is different from that of an acoustic piano.
[0005]
Also, in a normal acoustic stick, when adjusting the height of the keyboard, it is performed by adjusting the thickness of the balance punching that is inserted into the gap between the reed and the keyboard. When the height of the keyboard is adjusted by the balance punching 209 in the presence of the switch 260, the on / off timing of the button switch 260 also changes, so that the height of the button switch 260 must be adjusted.
[0006]
Further, in an acoustic piano, a time lag occurs from when a key is pressed to when a hammer strikes a string, but in the above-described electronic piano, a string striking sound is generated by the operation of the keyboard 211, so that the time lag cannot be faithfully reproduced. However, there is also a problem that the touch response (timing at which sound is emitted) is different from that of an acoustic piano.
[0007]
The present invention has been made in view of the above problems, and can apply the same technique as that of an acoustic stick when adjusting the height of a keyboard. It is an object of the present invention to provide a musical instrument keyboard device and an electronic piano.
[0008]
Means for Solving the Problems and Effects of the Invention
In order to solve the above-mentioned problem, an invention according to claim 1 is a keyboard for an electronic musical instrument comprising a keyboard capable of pressing a predetermined stroke depth, and an action load simulating member for applying a load simulating an action to the keyboard. In the device,
The action load simulation member,
A wipen-equivalent member that is rotatably attached to a keyboard device body and that rotates from a wipen initial position to a wipen rotating position with the rotation of the keyboard when the keyboard is depressed by a stroke depth;
A jack-equivalent member which is rotatably attached to the wippen-equivalent member, and which ascends while rotating from the initial jack position to the jack-swivel position with rotation of the wippen-equivalent member from the wippen initial position to the wippen rotation position; ,
A back check that is provided on the wippen equivalent member and that supports the hammer equivalent member at the hammer return position that rotates from the virtual string striking position toward the hammer initial position when the wippen equivalent member is at the wippen rotation position. Components,
While the jack-equivalent member is pivotally attached to the keyboard device main body and pivots from the initial jack position to the jack pivot position, the jack-equivalent member is initially pushed up by the jack-equivalent member and starts pivoting from the hammer initial position. A hammer equivalent member that moves apart from the equivalent member by inertia,
A stopper that abuts against the hammer-equivalent member that is performing inertial motion and prevents the movement of the hammer-equivalent member at a virtual string striking position;
A first detector that is provided near the hammer-equivalent member and detects that at least the hammer-equivalent member has reached a predetermined position defined between a hammer initial position and a hammer return position; Detecting means provided with a second detector for detecting that the striking position has been reached;
With
The second detector comprises a contact-type switch, and the stopper is provided in the second detector.And
The hammer equivalent member is made of a material having a higher specific gravity than wood.
It is characterized by.
[0009]
Here, the initial position of each member represents the position of each member before the key is depressed, that is, in a key released state, and the rotational position of each member is when the keyboard is depressed by the stroke depth, that is, when the key is depressed. This represents the position of each member in the key state. Further, the virtual string striking position is a position corresponding to a string striking position in a normal acoustic stick piano.
[0010]
In such a keyboard device for an electronic musical instrument, the wippen-equivalent member rotates from the whippen initial position to the wippen rotation position with the rotation of the keyboard when the keyboard is pressed a predetermined stroke depth by a player's key pressing operation. . Then, the jack equivalent member rises while rotating from the jack initial position to the jack rotation position. While the jack-equivalent member rotates from the jack initial position to the jack rotation position, the hammer-equivalent member is initially pushed up by the jack-equivalent member and starts to rotate from the hammer initial position, and then separates from the jack-equivalent member and performs an inertial motion. . Then, the stopper abuts on the hammer-equivalent member that is performing inertial movement and prevents the operation of the hammer-equivalent member at the virtual stringing position, and the detecting means detects that the hammer-equivalent member has reached the virtual stringing position. To detect. The sound generation can be controlled based on the detection time of the detection means.
[0011]
According to the keyboard device of the electronic musical instrument, the action load simulating member performs the same operation as the action mechanism of the normal acoustic stick except that the string is not struck. Therefore, an effect is obtained in which the touch feeling of the keyboard when the player performs the key pressing operation is equivalent to the touch feeling of a normal acoustic stick.
[0012]
In addition, since the detecting means is provided near the hammer equivalent member instead of below the keyboard as in the related art, it is not necessary to increase the interval between the reed and the keyboard, and the appearance is equivalent to that of a normal acoustic stick, When the keyboard height is adjusted, the same effect (adjustment based on the thickness of the balance punching) as that of a normal acoustic stick piano can be applied as it is.
[0013]
Further, when the member corresponding to the hammer reaches the virtual stringing position, the sounding timing can be set. In this case, the time lag of the acoustic piano can be faithfully reproduced, and an effect that the touch response becomes equivalent to that of the acoustic piano can be obtained. Here, the time lag refers to a time difference from when the keyboard is pressed down to the stroke depth in the acoustic piano to when the hammer strikes the string. This time lag is particularly noticeable when the keyboard is quickly pressed down, because energy is momentarily stored in the keyboard and the opposite side (the side connected to the action load simulating member) does not immediately jump up.
[0015]
Also thisIn the keyboard device, when the second detector detects a hammer-equivalent member, the sounding timing can be used, and when the first detector detects the hammer-equivalent member, the sound stopping timing can be used. In this case, unless the state in which the keyboard reaches the stroke depth is eliminated, the timing for stopping sound is not reached. Thereby, the same sound stopping timing as that of a normal acoustic stick piano can be obtained. In this regard, in many conventional electronic pianos, the sound stop timing is detected by other detection means provided on the keyboard. However, here, the sound stop timing can be reliably detected by the first detector. There is no need to provide another detection means on the keyboard. For this reason, the effect that the cost required for providing another detection means on the keyboard can be reduced can be obtained.
[0016]
As the first and second detectors, for example, contact-type switches (such as button switches and leaf switches) that are pressed / released by a hammer-equivalent member, and non-contact light-shielded / transmitted light by a hammer-equivalent member Type optical switch or the like can be used. Also, the first and second detectors do not necessarily need to be the same type of detector. For example, the first detector may be a non-contact switch, and the second detector may be a contact switch.
[0017]
Further, in this keyboard device, since the second detector can be used as a stopper at the same time, there is no need to separately provide a stopper, which simplifies the assembling process and is advantageous in terms of cost. can get.
The hammer-equivalent member is usually made of wood, but since the hammer-equivalent member is made of a material having a higher specific gravity than wood, the hammer-equivalent member can be made compact.
[0018]
Next, according to claim 2A keyboard device for an electronic musical instrument according to claim 1, whereinThe hammer-equivalent member is made of an acrylic resin molded into a substantially rectangular parallelepiped.
Even if you do this,The member corresponding to the hammer can be made compact.
[0019]
Next, claim 3The invention described in the above is an electronic piano.Or claim 2And an electronic sound control for generating a sound based on when the second detector detects the hammer-equivalent member, and thereafter stopping sound based on detection of the hammer-equivalent member by the first detector. Means.
In such an electronic piano, the electronic sound control means emits a sound when the member corresponding to the hammer reaches the virtual stringing position. In this case, the time lag of the acoustic piano can be faithfully reproduced, and an effect that the touch response becomes equivalent to that of the acoustic piano can be obtained.
[0020]
Also thisIn the electronic piano, when the second detector detects a hammer-equivalent member, the sound generation timing is reached, and when the first detector detects a hammer-equivalent member, the sound stop timing is reached. In this case, unless the state in which the keyboard reaches the stroke depth is eliminated, the timing for stopping sound is not reached. Thereby, the same sound stopping timing as that of a normal acoustic stick piano can be obtained.
[0021]
Claim 4The described invention,Claim 33. The electronic piano according to claim 1, wherein the electronic sound control means obtains keying information based on when the first and second detectors detect the hammer equivalent member, and emits an electronic sound based on the keying information. And
In such an electronic piano, for example, it is preferable to determine keying information (for example, keying strength) based on a time difference between when the first detector detects a member corresponding to a hammer and when the second detector detects the member.
[0022]
According to such an electronic piano, since the keying information, the sounding timing, and the sound stopping timing can be detected by the detecting means provided at one place, the cost is more advantageous than the case where the detecting means is provided at a different position for each piece of information. .
Since the electronic piano of the present invention is a piano that generates an electronic sound, strings can be eliminated, and weight members such as frames and supports for stretching the strings can be eliminated. In addition, the electronic sound control means includes a keyboard device of an electronic musical instrument (for example, a master device).keyboard) Separately from the keyboard device by a cable line or the like.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments of the present invention are not limited to the following examples in any way, and it goes without saying that various forms can be adopted as long as they belong to the technical scope of the present invention.
[First embodiment]
FIG. 1 is a schematic block diagram of the first embodiment, and FIG. 2 is an explanatory diagram of an action load simulating member of the first embodiment. As shown in FIG. 1, the electronic piano 1 includes an action load simulation member 2, a keyboard 11, a button switch 60, a control device 10, an electronic sound source 5, and a speaker 6.
[0024]
As shown in FIG. 2, the action load simulating member 2 is composed of a wippen 15, a regulating grail 16, a jack 17, a bat 18, a hammer shank 21 having a hammer 23, and a catcher shank 19 having a catcher 20. . The action load simulating member 2 is supported by support members (not shown) vertically provided on the left and right sides of the electronic piano 1. That is, the center rail 14, the regulating rail 16, the stop rail 32, and the hammer rail 28 are provided on the support member.
[0025]
As shown in FIG. 2, the wippen 15 and the bat 18 are rotatably mounted on the center rail 14 via the wippen flange 13 and the bat flange 18a, respectively. The hammer shank 21 and the catcher shank 19 are fixed to the bat 18. The jack 17 is urged counterclockwise in FIG. 2 by a compression spring 17b. Further, the regulation grail 16 is a member corresponding to a regulation button, and a felt is attached to a lower side of the rail.
[0026]
The stop rail 32 stops the hammer 23 at the virtual stringing position HH. That is, the hammer 23 rotates counterclockwise from the hammer initial position H1 when the bat 18 is pushed up by the jack 17, and then continues to rotate counterclockwise by inertial motion when the jack 17 separates from the bat 18. However, the stop rail 32 is provided at a position where it comes into contact with the hammer 23 performing the inertial motion and stops the operation of the hammer 23. A felt 32 a as a cushioning material is attached to the stop rail 32 on a surface facing the hammer 23. The hammer rail 28 supports the hammer shank 21 at the hammer initial position H1, and a felt 28a as a cushioning material is attached to a surface facing the hammer shank 21.
[0027]
The hammer 23 is formed by molding an acrylic resin into a substantially rectangular parallelepiped and has a specific gravity greater than that of wood. Therefore, the hammer 23 is designed to have the same weight as a normal wooden hammer, but is compacted including the hammer shank 21. I have. Hereinafter, the bat 18, the catcher shank 19, the catcher 20, the hammer shank 21, and the hammer 23 are referred to as a hammer equivalent member H.
[0028]
As shown in FIG. 2, the button switch 60 includes a first switch SW1 in which a fixed contact and a movable contact are paired in a cover 61 formed of an elastic material (rubber, synthetic resin, or the like). It has two switches SW2. The button switch 60 is disposed on the printed circuit board P at a position facing the bat 18. The first switch SW1 is switched by the butt 18 when the hammer equivalent member H reaches a predetermined position (not shown) defined between the hammer initial position H1 and the hammer intermediate position HB (described later). The second switch SW2 is pressed by the bat 18 and turned on only when the hammer equivalent member H reaches the virtual stringing position HH.
[0029]
The control device 10 is configured as a logical operation circuit including an input / output port 71, a well-known CPU 72, a ROM 73, a RAM 74, a backup RAM 75, a clock 76, and the like, as shown in FIG. . The control device 10 is connected to input signals from the first and second switches SW1 and SW2 of the button switch 60 through an input / output port 71, and also transmits a control signal to the electronic sound source through the input / output port 71. 5 to be output. The CPU 72 outputs a control signal to the electronic sound source 5 based on a control program stored in the ROM 73. The control device 10 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 5 in consideration of this detection information. It is.
[0030]
The electronic sound source 5 includes a recording unit (not shown) for recording the performance sound of the acoustic stick, that is, a striking sound, and a reproducing unit (not shown) for reading the sound from the recording unit. Is to pronounce.
Next, the operation of the electronic piano 1 will be described with reference to FIG.
[0031]
When the player depresses the keyboard 11 to a predetermined stroke depth, the wipen 15 is connected to the keyboard 11 via the capstan screw 12, so that the keyboard 11 is turned in a direction opposite to the direction in which the keyboard 11 rotates about the balance pin 7. (Counterclockwise in FIG. 2), and from the initial position W1 to the rotational position W2.
[0032]
Accordingly, the jack 17 rotates upward from the jack initial position J1 to reach the jack rotation position J2. The operation of the hammer equivalent member H during this time will be described in detail. That is, when the jack 17 rises while rotating from the jack initial position J1, the bat 18 at the hammer initial position H1 is pushed up by the jack 17, so that the hammer equivalent member H rotates the keyboard 11 about the rotation shaft 18b. It rotates in the opposite direction (counterclockwise in FIG. 2) to the moving direction. When the jack 17 rises to a certain extent, the jack tail 17a comes into contact with the regulation grail 16, so that the jack 17 turns in the turning direction of the keyboard 11 (clockwise in FIG. It reaches the jack rotation position J2. At this time, since the bat 18 is separated from the jack 17, the hammer equivalent member H performs an inertial motion. The hammer 23 of the member H corresponding to the hammer during the inertial motion collides with the felt 32a of the stop rail 32 at the virtual string striking position HH, and its operation is prevented.
[0033]
As described above, the hammer equivalent member H reaches the virtual stringing position HH from the hammer initial position H1 through the hammer intermediate position HB (described later) as shown in FIG. 2, but the first switch SW1 of the button switch 60 is From the hammer initial position H1 to the middle of the hammer middle position HB, the bat 18 pushes the switch from off to on, and the second switch SW2 is pressed by the bat 18 to the virtual stringing position HH to turn on from off.
[0034]
Thereafter, the hammer equivalent member H is swung back in the opposite direction after the hammer 23 collides with the felt 32a of the stop rail 32. Here, the second switch SW2 of the button switch 60 is turned off from on because the pressing by the bat 18 is released when the hammer equivalent member H rotates in the opposite direction from the virtual stringing position HH.
[0035]
When the keyboard 11 is kept depressed when the hammer equivalent member H is swung back, the wipen 15 remains at the wipen rotation position W2, the jack 17 remains at the jack rotation position J2, and the hammer equivalent member H is a catcher. 2 is supported in a posture received by a back check 29 shown by a dotted line in FIG. The position of the hammer equivalent member H in this posture is referred to as a hammer intermediate position HB (corresponding to the hammer return position of the present invention). When the hammer equivalent member H is at the hammer intermediate position HB, the first switch SW1 remains on.
[0036]
On the other hand, if the keyboard 11 is released when the hammer equivalent member H is swung back, the wipen 15 returns to the initial wipen position W1 and the jack 17 returns to the initial jack position J1. Return to the initial position H1. Therefore, the first switch SW1 of the button switch 60 is turned on from off at a predetermined position defined between the hammer intermediate position HB and the hammer initial position H1.
[0037]
Along with such an operation of the action load simulating member 2, the CPU 72 of the control device 10 executes a sound generation process which is one of the control programs stored in the ROM 73. Hereinafter, the sound generation processing will be schematically described based on the flowchart of FIG.
When this process is started, first, it is determined whether or not a key press is detected by the first and second switches SW1 and SW2 (S10). That is, when an ON signal is input from the first switch SW1 to the control device 10 and then an ON signal is input from the second switch SW2 to the control device 10, it is determined that a key press is detected. If no key press is detected in S10 (NO in S10), the process returns to S10. On the other hand, if a key press is detected in S10 (YES in S10), a time difference ΔT between the time when the ON signal is input from the first switch SW1 and the time when the ON signal is input from the second switch SW2 is determined. From the time difference ΔT, the key pressing speed V is calculated by, for example, the following equation (S12).
[0038]
V ← K / △ T (K is a constant)
Subsequently, the keying strength P is calculated from the keying speed V by, for example, the following equation (S14).
P ← K '· V (K' is a constant)
Then, a predetermined waveform signal is obtained based on the key number and the keying strength P, and the electronic sound source 5 is controlled based on the predetermined waveform signal to sound from the speaker 6 (S16). Here, the timing of sound generation is when the second switch SW2 is turned on (since the processes of S10 to S16 are performed in several msec, the sound generation timing is not delayed by these processes).
[0039]
Thereafter, it is determined whether or not the key release is detected by the first switch SW1 (S18). That is, when an off signal is input to the control device 10 from the first switch SW1, it is determined that key release has been detected. If a key release is not detected in S18 (NO in S18), the process returns to S18. At this time, the sound generated by the electronic sound source 5 is output from the speaker 6 so as to be gradually attenuated. On the other hand, if a key release is detected in S18 (YES in S18), the sound generation from the electronic sound source 5 is stopped (S20), and the process returns to S10 again.
[0040]
According to the first embodiment, the following effects can be obtained.
(1) Since the action load simulating member 2 performs the same operation as the action mechanism of the normal acoustic stick except that the string is not struck, the touch feeling of the keyboard when the player presses the key is usually The effect is equivalent to the touch feeling of an acoustic stick.
{Circle around (2)} Since the button switch 60 does not need to be provided below the keyboard 11, it is not necessary to increase the interval between the reed 8 and the keyboard 11, so that the appearance becomes the same as that of a normal acoustic stick, and the height of the keyboard is adjusted. In this case, a method similar to that of a normal acoustic stick (adjusted by the thickness (number) of the balance punching 9) can be applied as it is.
{Circle around (3)} The sound generation timing is when the second switch SW2 is turned on, that is, when the operation of the hammer 23 is stopped by the stop rail 32. This corresponds to the time when the hammer strikes a string in an acoustic piano. Therefore, an effect that the touch response becomes equivalent to that of an acoustic piano can be obtained.
{Circle around (4)} Since the keying information, the sounding timing, and the sound stopping timing can be detected by the button switch 60 provided at one place, it is advantageous in cost as compared with the case where the button switch is provided for each information and timing.
(5) The electronic piano 1 does not require strings, and does not require any weight members such as frames and supports for stretching the strings, so that the weight of the electronic piano 1 is considerably reduced as compared with the acoustic piano. [Second embodiment]
FIG. 4 is an explanatory view of an action load simulation member according to the second embodiment. As shown in FIG. 4, the second embodiment has the same configuration as the first embodiment except that the installation location of the button switch 60 is changed. Omitted. The schematic block diagram of the second embodiment is the same as that of the first embodiment shown in FIG.
[0041]
The button switch 60 has a first switch SW1 and a second switch SW2 each having a pair of fixed contacts and movable contacts in a cover 61 formed of an elastic material. The button switch 60 is disposed on the printed circuit board P at a position facing the catcher 20. The first switch SW1 is switched by the catcher 20 when the hammer equivalent member H reaches a predetermined position (not shown) defined between the hammer initial position H1 and the hammer intermediate position HB. The second switch SW2 is pressed by the catcher 20 and turned on only when the hammer equivalent member H reaches the virtual string striking position HH. Since the second embodiment is configured as described above, the same operation and effect as those of the first embodiment can be obtained.
[Modification of the above embodiment]
The location of the button switch 60 is set to the position facing the bat 18 in the first embodiment, and to the position facing the catcher 20 in the second embodiment. However, the bat 18, the catcher shank 19, the catcher 20, the hammer shank 21, the hammer Since the reference numeral 23 is integrated, the installation location may be any position facing any one of these members, and the first switch SW1 and the second switch SW2 are switched at the same timing as in the above-described embodiment. Should be switched. In this case, the same effect as in the first embodiment can be obtained.
[0042]
Further, in the above embodiment, if the posture of the hammer and the hammer shank when the second switch SW2 is pressed and turned on matches the stringing posture of the acoustic piano, the stop rail 32 is not particularly required. Good. In this case, since the second switch SW2 of the flexible button switch 60 plays the role of the stop rail 32, there is no need to separately provide the stop rail 32, which is advantageous in cost.
[0043]
Although the first and second switches SW1 and SW2 in the above embodiment use contact button switches, contact leaf switches and non-contact optical switches may be used instead. Here, the leaf switch is provided with one spring-plate-shaped movable contact between two fixed contacts facing each other, and the movable contact normally contacts one fixed contact (used as the first switch SW1). A switch that contacts the other fixed contact (used as the second switch SW2) by an external force, and contacts the fixed contact again when the external force is removed.
[0044]
In the above embodiment, the upright type electronic piano has been described. However, the present invention can be similarly applied to a grand type electronic piano.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram of a first embodiment.
FIG. 2 is an explanatory diagram of an action load simulation member according to the first embodiment.
FIG. 3 is a flowchart of a sound generation process.
FIG. 4 is an explanatory view of an action load simulation member according to a second embodiment.
FIG. 5 is an explanatory view of an action simulation load member of an electronic piano as a comparison object of the present invention.
[Explanation of symbols]
1 ... electronic piano, 2 ... action load simulation member,
5 ... electronic sound source, 6 ... speaker,
10 ... control device, 11 ... keyboard,
15 ... Wippen, 16 ... Regulatory grail,
17 ... Jack, 18 ... Bat,
19: Catcher shank, 20: Catcher,
21: hammer shank, 23: hammer,
28: hammer rail, 32: stop rail,
60 ... button switch, 61 ... cover,
SW1 ... first switch, SW2 ... second switch,

Claims (4)

A keyboard device for an electronic musical instrument including a keyboard capable of pressing a predetermined stroke depth and an action load simulating member for applying a load simulating an action to the keyboard,
The action load simulation member,
A wipen-equivalent member that is rotatably attached to a keyboard device body and that rotates from a wipen initial position to a wipen rotating position with the rotation of the keyboard when the keyboard is depressed by a stroke depth;
A jack-equivalent member which is rotatably attached to the wippen-equivalent member, and which ascends while rotating from the initial jack position to the jack-swivel position with rotation of the wippen-equivalent member from the wippen initial position to the wippen rotation position; ,
A back check that is provided on the wippen equivalent member and that supports the hammer equivalent member at the hammer return position that rotates from the virtual string striking position toward the hammer initial position when the wippen equivalent member is at the wippen rotation position. Components,
While the jack-equivalent member is pivotally attached to the keyboard device main body and pivots from the initial jack position to the jack pivot position, the jack-equivalent member is initially pushed up by the jack-equivalent member and starts pivoting from the hammer initial position. A hammer equivalent member that moves apart from the equivalent member by inertia,
A stopper that abuts against the hammer-equivalent member that is performing inertial motion and prevents the movement of the hammer-equivalent member at a virtual string striking position;
A first detector that is provided near the hammer-equivalent member and detects that at least the hammer-equivalent member has reached a predetermined position defined between a hammer initial position and a hammer return position; Detecting means having a second detector for detecting that the string has reached the striking position,
The second detector comprises a contact-type switch, and the stopper is the second detector ,
The keyboard device for an electronic musical instrument, wherein the hammer equivalent member is made of a material having a specific gravity greater than that of wood . 2. The keyboard device for an electronic musical instrument according to claim 1 , wherein the hammer-equivalent member is made of an acrylic resin molded into a substantially rectangular parallelepiped. A keyboard device for an electronic musical instrument according to claim 1 or 2 ,
Electronic sound control means for generating a sound based on when the second detector detects the hammer-equivalent member, and thereafter stopping the sound based on detection when the first detector detects the hammer-equivalent member. Electronic piano. The electronic sound control means determines the key entry information based on when the first and second detector detects the hammer equivalent member, electrons according to claim 3, characterized in that to sound a beep by ball striking key information piano.

Images