JP2010160263A - Electronic keyboard musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic keyboard musical instrument capable of optimal sound generation of musical tones corresponding to a different performance style by controlling start of sound generation of musical tones corresponding to the different performance style, such as jazz performance or classical performance. <P>SOLUTION: While any of the performance style is selected and specified from a plurality of performance styles by a mode switch in an operation switch section 7, two contact parts corresponding to the specified performance style are sequentially brought into the on-state when a keying operation for a key 4 is performed to sequentially bring each contact part, a first contact part 24 to a forth contact part 27, on a key switch 17 into the on-state, so that sound generation-controlling means (CPU 34) controls the start of sound generation of musical tones. Thus, the optimal sound generation of musical tones corresponding to the different performance style can be achieved as the sound generation of musical tones corresponding to the different performance style, such as jazz performance or classical performance is possible. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic keyboard instrument such as an electronic piano, and more particularly to an electronic keyboard instrument that generates musical sounds in response to a key pressing operation of a plurality of keys.

  Conventionally, in an electronic keyboard instrument, as described in Patent Document 1, a key depression of each key is detected by a plurality of key switch units provided corresponding to each key of the keyboard, and this detection is performed. When generating a tone signal in response, the key switch outputs an ON signal at different depths of the key stroke when the key is pressed, and the tone color of the tone to be generated based on the output ON signal is output. What is configured to control is known.

JP 08-76757 A

  However, in such a conventional electronic keyboard instrument, it is possible to control the tone of a musical tone that is generated according to the key stroke depth position when the key is pressed. However, since the musical sound is generated at the same timing, there is a problem that the musical sound cannot be optimally generated according to different performance forms such as jazz performance and classical performance.

For example, in jazz performance, since the key touch is light and the key stroke depth is shallow, it is necessary to advance the timing of starting the sound generation. Also, in classical performance, the key touch is heavy and the key stroke is deep, so it is necessary to delay the timing for starting the tone generation. For this reason, in the jazz performance and the classical performance, a good musical tone cannot be obtained unless the timing of starting the musical tone is changed.

  The problem to be solved by the present invention is an electronic keyboard instrument that can control the start of tone generation according to different performance forms such as jazz performances and classical performances, and can optimally generate musical sounds according to different performance forms Is to provide.

In order to solve the above problems, the present invention includes the following components.
According to a first aspect of the present invention, there is provided an electronic keyboard instrument that emits a musical tone by pressing a plurality of keys, and a key switch having at least three contact portions that are sequentially turned on in response to the key pressing operation. Means, a performance mode selection means for selecting and specifying any one of a plurality of performance modes having different key stroke depths during the key pressing operation, and any one of the plurality of performance modes by the performance mode selection means. When the key is pressed and the respective contact portions of the key switch means are sequentially turned on in a state where the key is selected and designated, the two contact portions corresponding to the designated performance form are turned on sequentially. Thus, an electronic keyboard instrument is provided with sound generation control means for controlling the start of sound generation.

  According to a second aspect of the present invention, when the sound generation control means returns the key to the initial position after the respective contact portions of the key switch means are sequentially turned on in response to the key pressing operation, 2. The electronic keyboard instrument according to claim 1, wherein a stop of sound generation of the musical tone is controlled by turning off a contact portion that is turned on first.

  The invention according to claim 3 is provided with a key stroke adjusting member for adjusting the depth of the key stroke during the key pressing operation to any one of the plurality of performance forms. Alternatively, the electronic keyboard instrument according to claim 2.

  According to the present invention, when the key is depressed and the respective contact portions of the key switch means are sequentially turned on, the two contact portions corresponding to the performance mode selected and designated by the performance mode selection means are sequentially turned on. Thus, the sound generation control means can control the start of sound generation. For this reason, since a musical sound can be sounded according to different performance forms, such as a jazz performance and a classical performance, a musical sound can be sounded optimally according to a different performance form.

It is the top view which showed Embodiment 1 of the electronic keyboard musical instrument to which this invention is applied. FIG. 2 is an enlarged cross-sectional view showing an AA arrow in the electronic keyboard instrument of FIG. 1. FIG. 3 is an enlarged cross-sectional view illustrating a state in which the key is pressed in the state of FIG. 2 and the first operator of the key switch turns on the first contact portion. FIG. 4 is an enlarged cross-sectional view showing a state where the key is further depressed in the state of FIG. 3 and the second and third operation elements of the key switch sequentially turn on the second and third contact portions. FIG. 5 is an enlarged cross-sectional view showing a state in which the key is further pressed in the state of FIG. 4 and a fourth operator of the key switch turns on a fourth contact portion. It is explanatory drawing which showed the OFF state when returning to an initial position after each 1st-4th contact part turns ON sequentially by the key pressing depth in the state of FIGS. It is the block diagram which showed the circuit structure of the electronic keyboard instrument of FIG. It is the figure which showed the main flow in the electronic keyboard musical instrument of FIG. It is the figure which showed the operation | movement flow of the operation switch process in FIG. It is the figure which showed the operation | movement flow of the keyboard process in FIG. It is the figure which showed the operation | movement flow of the key processing of the key number N in FIG. It is the top view which showed Embodiment 2 of the electronic keyboard musical instrument to which this invention is applied. FIG. 13 is an enlarged side view showing a left side surface of the electronic keyboard instrument of FIG. 12. FIG. 13 is an enlarged cross-sectional view showing the arrow BB in the electronic keyboard instrument of FIG. 12. It is the enlarged view which showed the key stroke adjustment member of FIG. FIG. 15 is an enlarged cross-sectional view showing a state in which the key stroke is deeply adjusted by the key stroke adjusting member in FIG. 14 for classical performance and the key is pressed. FIG. 15 is an enlarged cross-sectional view illustrating a state in which the key stroke is shallowly adjusted for jazz performance by the key stroke adjusting member in FIG. 14 and the key is pressed.

(Embodiment 1)
A first embodiment of an electronic keyboard instrument to which the present invention is applied will be described below with reference to FIGS.
As shown in FIG. 1, the electronic keyboard instrument includes a musical instrument body 1. As shown in FIGS. 1 and 2, the musical instrument body 1 is provided with a keyboard portion 2. In this keyboard section 2, a large number of keys 4 made up of white keys and black keys are arranged on a keyboard chassis 3 that also serves as a lower case, and the rear end sides (the left end side in FIG. 2) of these numerous keys 4. The structure is covered with the upper case 5.

In this case, as shown in FIG. 2, the upper case 5 is provided with a boss portion 5 a on its lower surface, and this boss portion 5 a is attached on the rear portion of the keyboard chassis 3, thereby Arranged to cover the rear end side of each key 4. Further, as shown in FIG. 1, a display unit 6 and an operation switch unit 7 are provided on the upper surface of the upper case 5.

The display unit 6 includes a flat display panel such as a liquid crystal display panel or an EL (electroluminescence) display panel, and is configured to display various information necessary for performance such as volume and tone color electro-optically. Yes. Further, the operation switch unit 7 includes various switches necessary for selecting various functions such as a power source, a volume, a tone color, and a performance form.

2 to 5, the rear end portion of the key 4 is rotatably attached to a key support portion 8 provided on the rear portion of the keyboard chassis 3, and the key 4 is moved up and down according to a key pressing operation. And an action load is applied by the hammer member 10 at this time. That is, the hammer member 10 includes a hammer body 11 as shown in FIGS. 2 to 5, and the front side (right side in FIG. 2) of the hammer body 11 is attached to a hammer support portion 12 provided on the keyboard chassis 3. It is attached so as to be freely rotatable, and is configured to rotate in the vertical direction in accordance with the rotation operation of the key 4.

In this case, as shown in FIG. 2, a weight 13 is provided at the rear portion (left side in FIG. 2) of the hammer body 11. Further, a key connecting portion 15 held by a hammer holding portion 14 provided on the key 4 is provided at the front end portion of the hammer body 11. As a result, when the key 4 is pressed, the hammer connecting part 15 of the hammer main body 11 is pushed down by the hammer holding part 14 of the key 4, and the hammer main body 11 is reduced in weight to the weight 13. The action load is applied to the key 4 by rotating around the hammer support portion 12 against the key 4.

On the other hand, as shown in FIG. 2, a switch board 16 is provided in the middle part of the keyboard chassis 3, and a key switch 17 that detects the rotation of the key 4 is provided on the switch board 16. Are provided corresponding to each. The key switch 17 includes a switch main body 18 attached to the switch board 16 and first to fourth operating elements 20 to 20 which are provided on the switch main body 18 and sequentially switch in response to a key pressing operation of the key 4. 23 and first to fourth contact portions 24 to 27 provided in the switch body 18 and turned on and off by the first to fourth operators 20 to 23, respectively.

In this case, among the first to fourth operators 20 to 23, the first and second operators 20 and 21 respectively protrude above the switch board 16 as shown in FIG. 2. The first operator 20 is formed slightly longer than the second operator 21. As a result, when the first and second operating elements 20 and 21 are sequentially pushed down by the pressing portion 4a of the key 4 during the key pressing operation, as shown in FIG. The first contact portion 24 is turned on, and thereafter, as shown in FIG. 4, the second operator 21 is configured to turn on the second contact portion 25.

Further, as shown in FIG. 2, each of the third and fourth operating elements 22 and 23 protrudes below the switch board 16, and the third operating element 22 is formed slightly longer than the fourth operating element 23. Has been. As a result, when the key 4 is pressed and the hammer body 11 is rotated and sequentially pushed up by the pressing portion 11a of the hammer body 11, the third and fourth operators 22 and 23 are shown in FIG. As shown in the figure, first, the third operator 22 turns on the third contact portion 26, and thereafter, the fourth operator 23 turns on the fourth contact portion 27 as shown in FIG. Yes.

Thus, as shown in FIGS. 2 to 6, when the key 4 is depressed, the key switch 17 is configured such that the first operator 20 first presses the pressing portion 4a of the key 4 as shown in FIG. When the key 4 is further pushed down as shown in FIG. 4, the second operating element 21 is pushed down by the pressing portion 4 a of the key 4 and the second contact portion 25 is pressed down. When the key 4 is turned on and the key 4 is further pushed down, as shown in FIG. 4, the third operating element 22 is pushed up by the pushing portion 11a of the hammer body 11, the third contact portion 26 is turned on, and the key 4 is pushed down most. As shown in FIG. 5, the fourth operating element 23 is pushed up by the pressing portion 11a of the hammer body 11, and the fourth contact portion 27 is turned on.

2 to 6, when the depressed key 4 returns to the initial position, the fourth switch 23 is first set in the hammer body, contrary to the operation described above. The fourth contact portion 27 is turned off away from the pressing portion 11a of the eleventh, and then the third operation portion 22 is separated from the pressing portion 11a of the hammer body 11 and the third contact portion 26 is turned off. 21 is separated from the pressing portion 4a of the key 4 and the second contact portion 25 is turned off. Finally, the first operating element 20 is separated from the pressing portion 4a of the key 4 and the first contact portion 24 is turned off. Has been.

Next, the circuit configuration of the electronic keyboard instrument will be described with reference to the block diagram of FIG.
The circuit configuration of the electronic keyboard instrument includes an input unit 30 that receives input signals in response to switch operations such as the operation switch unit 7 and the key switch 17, and a signal control unit that controls the input signals input through the input unit 30. 31, an output unit 32 that outputs various kinds of information such as musical sounds based on a signal controlled by the signal control unit 31, and a power supply unit 33 that supplies power to the output unit 32.

The input unit 30 includes an operation switch unit 7 and a key switch 17. The operation switch unit 7 includes various switches such as a volume switch, a tone color switch, and a performance mode switch. In this case, the performance mode switch selects and designates one of a plurality of performance forms. For example, the plurality of performance forms include jazz performance with shallow key strokes and classic performance with deep key strokes. Moreover, the key switch 17 is provided corresponding to each key 4 as described above, and includes first to fourth contact portions 24 to 27 that are sequentially turned on in response to a key pressing operation of each key 4. Yes.

The signal control unit 31 is input from a CPU (Central Processing Unit) 34 that controls the entire circuit of the electronic keyboard instrument, a ROM (Read Only Memory) 35 in which a predetermined program is stored, and an input unit 30. In addition, a random access memory (RAM) 36 that stores the data and the processed data in a writable and readable manner, and a bus 37 that connects them are provided. The output unit 32 includes a sound source unit 38 such as a speaker that generates musical sounds, and a display unit 6 that displays information such as data input by the input unit 30 and processing data thereof.

Next, the operation of the electronic keyboard instrument will be described with reference to FIGS.
In the main flow of this electronic keyboard instrument, as shown in FIG. 8, when the operation starts, the CPU 34 executes an initial setting process (initialization) (step S1). In this initial setting process, the data of all the key switches 17 corresponding to each key 4 and its count data are cleared.

After executing the initial setting process, the operation switch process of the operation switch unit 7 is executed (step S2). In this operation switch processing, the volume switch is used to adjust the volume, the tone switch is used to select and specify the tone, and the performance mode switch is used to select one of the different performance types such as jazz performance or classical performance. To specify. After executing this operation switch process, a keyboard process is executed (step S3).

In this keyboard process, when each key 4 of the keyboard unit 2 is pressed, the key pressing speed of the corresponding key 4 is measured to control the tone generation. After executing the keyboard process in step S3, other processes other than the above are performed (step S4), the process returns to the operation switch process in step S2 again, and the steps until the power switch of the operation switch unit 7 is turned off. The operations from S2 to S4 are repeated.

Next, the operation switch processing operation in the main flow will be described with reference to FIG.
In the operation switch process, when the operation starts, the performance mode switch of the operation switch unit 7 is operated by the CPU 34 to determine whether one of the classical performance of mode number 1 and the jazz performance of mode number 2 is selected. Is determined (step S10).

If it is determined in step S10 that the classical performance of mode number 1 is selected, mode number 1 is stored in a mode number register secured in the work area in RAM 36 (step S11). When mode number 1 which is a classical performance is stored in the mode number register in step S11, other switch processing is executed (step S12), and the process returns to the main flow.

If it is determined in step S10 that the jazz performance of mode number 2 is selected, mode number 2 is stored in the mode number register secured in the work area in RAM 36 (step S13). When the mode number 2 that is jazz performance is stored in the mode number register in step S13, the process proceeds to step S12 to execute other switch processing and return to the main flow.

Next, the keyboard processing operation in the main flow will be described with reference to FIG.
In this keyboard process, when the operation starts, the CPU 34 needs to search for all the operations of the large number of keys 4 in the keyboard unit 2, so the key counter N indicating the number of the key 4 is set to “0” ( Step S20), the key processing of the key number N is executed (Step S21). The key processing of the key number N is performed by measuring the key pressing speed of the corresponding key 4 when the key 4 of the key number N (hereinafter referred to as the Nth key 4) is pressed. The musical sound is generated by controlling the volume of the musical sound and the start timing of the sound generation according to the key pressing speed.

After executing the key processing of the key number N in step S21, “1” is added to the key counter N (step S22), and it is determined whether or not the key counter N is the maximum number of keys (step S23). . At this time, if the key counter N is not the maximum number of keys, the process returns to step S21, and the operations from step S21 to step S23 are repeated until key processing is executed for all the keys 4 of the keyboard unit 2. When the key counter N reaches the maximum number of keys in step S23 and it is determined that key processing has been executed for all the keys 4 of the keyboard unit 2, the process returns to the main flow.

Next, with reference to FIG. 11, the key process of the key number N in the keyboard process will be described.
In the key processing of the key number N, when the operation starts, the CPU 34 determines whether or not the second contact portion 25 is turned on from off after the first contact portion 24 of the key switch 17 is turned on from off. Judgment is made (step S30). At this time, if it is determined that the second contact portion 25 has been switched from OFF to ON, it is determined whether or not the mode number stored in the mode number register is the mode number 1 of classical performance (step S31).

In this step S31, if the mode number stored in the mode number register is the classical performance mode number 1, the stroke of the key 4 is in a deep position because the depressed key 4 is a deep performance. It is necessary to measure the key pressing speed at the third contact portion 26 and the fourth contact portion 27. Therefore, at this time, the key pressing speed is not measured, and the process returns to step S21 of the keyboard process, and then waits until the third contact portion 26 of the key switch 17 corresponding to the Nth key 4 is turned on from off. To do.

If the mode number is not the classical performance mode number 1 in step S31, it is determined that the jazz performance mode number is 2. In this jazz performance mode number 2, the key 4 to be pressed has a shallow stroke, so that the key pressing speed is changed between the second contact portion 25 and the third contact portion 26 where the stroke of the key 4 is shallow. Need to be measured.

For this reason, when it is determined in step S31 that the mode number is 2 for jazz performance, measurement of the key pressing speed of the pressed Nth key 4 is started (step S32). The measurement of the key pressing speed is performed by counting a timer corresponding to the Nth key 4 pressed. When the measurement of the key pressing speed of the key 4 is started in step S32, the process returns to step S21 of the keyboard processing, and then the third contact portion 26 of the key switch 17 corresponding to the Nth key 4 is turned on from off. stand by.

Then, returning to step S30 again, if it is determined in step S30 that the second contact portion 25 of the key switch 17 has already been turned on, it is determined whether or not the third contact portion 26 has been turned on from off. (Step S33). At this time, if it is determined that the third contact portion 26 has been turned on from OFF, it is determined whether or not the mode number stored in the mode number register is the mode number 1 of classical performance (step S34).

  If the mode number is not the classical performance mode number 1 in step S34, it is determined that the mode number is 2 for jazz performance, and the measurement of the key depression speed for the Nth key 4 that has been depressed is terminated (step S34). S35). At this time, the count of the timer corresponding to the pressed Nth key 4 is stopped, and the count value is stored in the register corresponding to the Nth key 4.

In this step S35, the key pressing speed of the Nth key 4 pressed is calculated from the count value stored in the register, and the tone generator 38 is instructed to generate a tone corresponding to the Nth key 4 and calculated. The tone generation of the musical tone is started at a volume corresponding to the key-pressing speed of the N-th key 4 (step S36), and the process returns to step S21 of the keyboard processing. Continue to pronounce the tone until given.

In step S34, if the mode number stored in the mode number register is the mode number 1 of the classic performance, the pressed key 4 is a deep performance, so that the Nth key pressed The timer corresponding to 4 is counted, the measurement of the key pressing speed of the pressed Nth key 4 is started (step S37), the process returns to step S21 of the keyboard processing, and then corresponds to the Nth key 4. It waits until the 4th contact part 27 of the key switch 17 turns from OFF to ON.

Then, returning to step S33 again, if it is determined in step S33 that the third contact portion 26 of the key switch 17 has already been turned on, it is determined whether or not the fourth contact portion 27 has been turned on from off. (Step S38). At this time, if the fourth contact portion 27 is not turned on, it is determined that the depressed Nth key 4 is a jazz performance with a shallow key depression operation and is in a state of returning to the initial position. Then, it is determined whether or not the first contact portion 24 has been turned off from on (step S39).

At this time, if the first contact portion 24 is not turned off from on in step S39, it is determined that the Nth key 4 is in the middle of returning to the initial position, and the process returns to step S21 of the keyboard processing. In step S39, the process waits until the first contact 24 is turned off. When the first contact portion 24 is turned off from on in step S39, the sound source portion 38 is instructed to mute the musical tone corresponding to the Nth key 4 pressed in the jazz performance form, and the Nth key. The tone generation corresponding to 4 is stopped (step S40), and the process returns to step S21 of the keyboard process.

If it is determined in step S38 that the fourth contact portion 27 has been switched from OFF to ON, it is determined whether or not the mode number stored in the mode number register is the classical performance mode number 1 (step S41). ). If the mode number is not 1 in step S41, it is determined that the mode number is 2 for jazz performance with a shallow key press operation, and the process returns to step S21 of the keyboard process.

If it is determined in this step S41 that the mode number is 1 for classic performance with a deep key-pressing operation, the measurement of the key-pressing speed for the N-th key 4 that has been pressed is terminated (step S42). Also at this time, the count of the timer corresponding to the pressed Nth key 4 is stopped, and the count value is stored in the register corresponding to the Nth key 4.

In step S42, the key pressing speed of the Nth key 4 pressed is calculated from the count value stored in the register, and the tone generator 38 is instructed to generate a tone corresponding to the Nth key 4 and calculated. The tone generation of the musical tone is started at a volume corresponding to the key-pressing speed of the Nth key 4 (step S43), and the process returns to step S21 of the keyboard processing. Continue to pronounce the tone until given.

Then, returning to step S38 again, if it is determined in step S38 that the fourth contact portion 27 has already been turned on, the N-th key 4 pressed in the classical performance form in step S39 is initialized. It is determined that the position has returned to the position, and the system waits until the first contact portion 24 is turned off from on.

When the first contact portion 24 is turned off from on in step S39, the sound source portion 38 is instructed to mute the musical sound corresponding to the Nth key 4 of the classical performance pressed in step S40, and the Nth key 4 Is stopped (step S40), and the process returns to step S21 of the keyboard process. The key processing of the key number N is keyboard processing, and the operations from step S30 to step S43 are repeatedly executed for all the keys 4 of the keyboard unit 2.

As described above, according to the electronic keyboard instrument, when the key 4 is depressed and the first to fourth contact portions 24 to 27 of the key switch 17 are sequentially turned on, the performance of the operation switch portion 7 is performed in advance. Two contact portions corresponding to the performance mode selected and designated by the mode switch, that is, the second and third contact portions 25 and 26 for jazz performance or the third and fourth contact portions 26 and 27 for classical performance are provided. By sequentially turning on, it is possible to control the start of tone generation. For this reason, since a musical sound can be sounded according to different performance forms, such as a jazz performance and a classical performance, a musical sound can be sounded optimally according to a different performance form.

In this case, after the key 4 is pressed and each of the first to fourth contact portions 24 to 27 of the key switch 17 is sequentially turned on, when the key 4 returns to the initial position, the first turned on first. Since the sound of the musical tone is stopped when the contact portion 24 is turned off, it is possible to optimally mute the musical tone according to different performance forms such as jazz performance and classical performance, and this is also good according to different performance forms. As a result, it is possible to improve performance.

(Embodiment 2)
Next, a second embodiment of an electronic keyboard instrument to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
As shown in FIGS. 12 to 15, this electronic keyboard instrument is configured to include a key stroke adjustment member 41 that adjusts the stroke depth of the key 4 during a key pressing operation. It has almost the same configuration.

That is, as shown in FIGS. 12 to 15, the key stroke adjusting member 41 is pivotally attached to the lower part of the inner surface of both sides of the musical instrument main body 1, and stands upright above the bottom plate 3 a of the keyboard chassis 3. A pair of support arms 42, a stopper portion 43 spanning the upper ends of the pair of support arms 42, and a pair of position restricting members 44 that restrict the inclination of the pair of support arms 42.

In this case, the lower end portion 42a of the support arm 42 is bent at a right angle as shown in FIG. 15, and the bent lower end portion 42a can be rotated to the lower side of the side surface of the instrument body 1 as shown in FIG. It is configured to be attached to. Moreover, the stopper part 43 is arrange | positioned in the state which followed along the rear part upper direction of each hammer member 10 arrange | positioned corresponding to each key 4, as shown in FIG. 12 and FIG.

As a result, the key stroke adjusting member 41 is provided with a pair of support arms 42 in the vicinity of the portion corresponding to the weight 13 of the hammer member 10 as shown in FIGS. 12 and 14, and as shown in FIG. When the support arm 42 of the hammer member 10 stands up almost vertically, the stopper portion 43 spanned between the upper end portions of the pair of support arms 42 is disposed on the movement locus of the weight 13 of the hammer member 10, and in this state, the key When the hammer body 11 is rotated in accordance with the key pressing operation 4, the weight 13 of the hammer body 11 abuts the lower surface of the stopper portion 43, thereby restricting the rotation range of the hammer body 11 to a minimum. Thus, the key stroke when the key 4 is depressed is shallow.

Further, as shown in FIG. 16, the key stroke adjusting member 41 is provided at the upper end of the pair of support arms 42 when the pair of support arms 42 is inclined to the front side (right side in FIG. 16) of the key 4. When the stretched stopper portion 43 is disposed at a position away from the movement locus of the weight 13 of the hammer member 10 and the hammer body 11 is rotated in accordance with the key pressing operation of the key 4 in this state, Since the weight 13 of the main body 11 does not contact the lower surface of the stopper portion 43, the rotation range of the hammer main body 11 is maximized, and the key stroke when the key 4 is pressed is deepened.

In this case, as shown in FIGS. 12 and 15, each of the pair of support arms 42 is provided with a spring member 45 on its upper side, and the position of each spring member 45 is regulated by the pair of position regulating members 44. Thereby, it is comprised so that the inclination of a pair of support arm 42 may be controlled. That is, as shown in FIG. 15, the position restricting member 44 includes a first restricting recess 44 a that elastically locks the spring member 45 provided on the support arm 42 when the support arm 42 stands vertically. When the support arm 42 is tilted toward the front side (right side in FIG. 15) of the key 4, a second restriction recess 44 b is provided that elastically locks the spring member 45 of the support arm 42.

Further, as shown in FIGS. 12 and 15, operation portions 46 for moving the stopper portion 43 and tilting the pair of support arms 42 are provided at both ends of the stopper portion 43, respectively. As shown in FIGS. 12 and 13, the operation unit 46 is inserted into an arc-shaped elongated hole 47 provided at the upper part on both sides of the musical instrument main body 1, and projects outward from the inner side of the musical instrument main body 1. By moving the protruding portion along the long hole 47, the support arm 42 is rotated around the lower end portion 42a of the support arm 42 and tilted at a predetermined angle.

Next, a case where the key stroke of the key 4 is adjusted by the key stroke adjusting member 41 will be described.
First, when performing a classical performance, as shown by solid lines in FIGS. 14 and 15, the operation unit 46 is operated to tilt the pair of support arms 42 toward the front side of the key 4 (the right side in FIG. 14). The portion 43 is arranged at a position away from the movement locus of the weight 13 of the hammer member 10.

That is, as shown in FIG. 13, when the operation portion 46 is moved to the front side (right side in FIG. 13) of the musical instrument body 1, the pair of support arms 42 together with the stopper portion 43 is centered on the lower end portion 42a. It rotates clockwise and tilts toward the front side of the key 4 (right side in FIG. 13). At this time, as shown in FIG. 15, when the spring member 45 provided on the support arm 42 moves along the position restricting member 44 and the support arm 42 is inclined at a predetermined angle, the spring member 45 is moved to the second restricting recess 44b. It is elastically locked to.

When the key 4 is pressed in this state, as shown in FIG. 16, the key connecting portion 15 of the hammer body 11 is pushed down by the hammer holding portion 14 of the key 4, and accordingly, the hammer body 11 is weighted by the weight 13. The hammer support portion 12 is rotated around the hammer. At this time, the weight 13 does not come into contact with the stopper portion 43 of the key stroke adjusting member 41 and moves above the stopper portion 43, so that the key stroke of the key 4 is deepened.

For this reason, a classic performance with a deep keystroke of the key 4 becomes possible. In this state, in the key switch 17, all of the first to fourth operators 20 to 23 are operated by the pressing portion 4a of the key 4 and the pressing portion 11a of the hammer member 10, and the first to fourth each. All of the contact parts 24 to 27 are sequentially turned on. As a result, the CPU 34 starts sound generation as in the first embodiment by sequentially turning on the third and fourth contact portions 26 and 27 among the first to fourth contact portions 24 to 27. To control.

On the other hand, when performing jazz performance, as shown by broken lines in FIGS. 14 and 15, the operation portion 46 is operated to raise the pair of support arms 42 substantially vertically, and the stopper portion 43 is attached to the hammer member 10. It is arranged on the movement locus of the weight 13. That is, as shown in FIG. 13, when the operation portion 46 is moved to the rear side (left side in FIG. 13) of the instrument body 1, the pair of support arms 42 together with the stopper portion 43 is centered on the lower end portion 42a. Rotate counterclockwise and stand substantially perpendicular to the key 4.

At this time, as shown in FIG. 15, when the spring member 45 of the support arm 42 moves along the position restricting member 44 and the support arm 42 stands almost vertically, the spring member 45 elastically moves to the first restricting recess 44a. It is locked to. When the key 4 is pressed in this state, as shown in FIG. 17, the key connecting portion 15 of the hammer body 11 is pushed down by the hammer holding portion 14 of the key 4, and accordingly, the hammer body 11 is weighted by the weight 13. The hammer support portion 12 is rotated around the hammer.

At this time, since the weight 13 contacts the stopper portion 43 of the key stroke adjusting member 41, the key stroke of the key 4 becomes shallow. For this reason, a jazz performance with a shallow keystroke of the key 4 becomes possible. In this state, of the first to fourth operators 20 to 23, the key switch 17 is such that only the first to third operators 20 to 22 press the pressing portion 4 a of the key 4 and the hammer member 10. Only the first to third contact portions 24 to 26 are sequentially turned on. Thus, the CPU 34 controls the tone generation by turning on the second and third contact portions 25 and 26 sequentially among the first to third contact portions 24 to 26.

Thus, according to this electronic keyboard instrument, in addition to the same effects as in the first embodiment, according to the performance mode such as jazz performance or classic performance selected and designated by the performance mode switch of the operation switch unit 7, The key stroke at the time of pressing the key can be adjusted by the key stroke adjusting member 41, whereby the key 4 can be operated with the key stroke corresponding to the performance form, and each of the first to fourth keys of the key switch 17 can be operated. It is possible to simplify the control processing of the CPU 34 that controls the tone generation based on the on / off signals output from the contact portions 24 to 27.

That is, the key stroke adjusting member 41 operates the operation portion 46 to change the inclination of the pair of support arms 42, thereby causing the stopper portion 43 to correspond to the movement locus of the weight 13 of the hammer member 10, Since the depth of the stroke of the key 4 can be adjusted by arranging it at any position away from the movement locus of the weight 13 of the hammer member 10, the classic performance with a deep keystroke of the key 4; The key stroke can be easily switched according to the jazz performance with a shallow key stroke of the key 4.

For this reason, in the case of a classical performance in which the key stroke of the key 4 is deep, the key stroke can be deepened and the first to fourth contact portions 24 to 27 of the key switch 17 can be sequentially turned on. The tone generation of the musical tone can be controlled by sequentially turning on the third and fourth contact portions 26 and 27. Further, when performing a jazz performance where the key stroke of the key 4 is shallow, only the first to third contact portions 24 to 26 of the key switch 17 can be sequentially turned on by reducing the key stroke. The tone generation of the musical tone can be controlled by sequentially turning on the second and third contact portions 25 and 26.

In the first and second embodiments, among the first to fourth operators 20 to 23 of the key switch 17, the first and second operators 20 and 21 are protruded above the switch board 16. Although the case where the third and fourth operators 22 and 23 are configured to protrude below the switch board 16 has been described, the present invention is not limited to this. For example, the first to fourth operators 20 to 23 are provided. All of the above may be configured to protrude above the switch substrate 16.

In this case, the first to fourth operators 20 to 23 form the first operator 20 with the longest length, and the second to fourth operators 21 to 23 are shortened stepwise. What is necessary is just to comprise so that it may push down in order by the press part 4a of the key 4 at the time of key pressing operation. If comprised in this way, it does not necessarily need to be an electronic keyboard instrument of the structure which provides the action load to the key 4 with the hammer member 10, It can apply also to the electronic keyboard instrument which does not use a hammer member.

In the first and second embodiments and the modifications thereof, the case where the key switch 17 is configured to include the first to fourth operators 20 to 23 has been described. The operation elements 20 to 23 are not necessarily provided, and a rubber sheet is disposed on the switch board 16, a dome-shaped bulge is formed on the rubber sheet, and a plurality of different lengths are formed in the bulge. A movable contact may be provided, and the plurality of movable contacts may be configured to sequentially come into contact with the fixed contacts on the switch substrate 126 according to the key pressing operation.

Furthermore, in the first and second embodiments and the modifications thereof, the case where the key switch has four contact portions that are sequentially turned on by a key pressing operation has been described. However, the four contact portions need not necessarily be provided. Alternatively, the configuration may include three contact portions, or may include five or more contact portions.

DESCRIPTION OF SYMBOLS 1 Musical instrument body 2 Keyboard part 4 Key 6 Display part 7 Operation switch part 10 Hammer member 16 Switch board 17 Key switch 20-23 Each 1st-4th operation element 24-27 Each 1st-4th contact part 30 Input Unit 31 Signal control unit 32 Output unit 34 CPU
35 ROM
36 RAM
38 Sound source 41 Key stroke adjustment member

Claims (3)

In an electronic keyboard instrument that emits a musical sound by pressing a plurality of keys,
Key switch means having at least three contact portions that are sequentially turned on in response to the key pressing operation;
A performance mode selection means for selecting and specifying one of a plurality of performance forms having different key stroke depths during the key pressing operation;
In a state in which any one of the plurality of performance forms is selected and designated by the performance mode selection means, the designated keys are operated when the keys are pressed and the contact portions of the key switch means are sequentially turned on. An electronic keyboard instrument comprising: sound generation control means for controlling the start of sound generation by sequentially turning on two contact portions corresponding to a performance form.   The sound generation control means turns off the contact portion that is first turned on when the key returns to the initial position after the contact portions of the key switch means are sequentially turned on in response to the key pressing operation. The electronic keyboard instrument according to claim 1, wherein the stop of the tone generation is controlled. 3. The electronic keyboard according to claim 1, further comprising a key stroke adjusting member that adjusts a depth of the key stroke during the key pressing operation to any one of the plurality of performance forms. Musical instrument.

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