JP2011028034A - Electronic keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic keyboard instrument which makes the sound generated by a speaker change delicately, according to the key-depressing operation of a plurality of keys in a keyboard section, and which outputs sound from between the plurality of keys, in a superior manner. <P>SOLUTION: An aperture 35 for outputting sound in which an opening state changes according to key-depressing operation, is provided in the plurality of keys 11 in the keyboard section 8. Hence, when the speaker 32 outputs musical sound by key-depressing operation of the plurality of keys 11 in the keyboard section 8 and the output musical sound passes through the aperture 35 of the keys 11, the opening state of the aperture 35 of each key 11 changes, according to the key-depressing operation, and the musical sound can be changed delicately, according to change of the opening state of the aperture 35. As a result, the sound generated by the speaker 32 according to key-depressing operation of the plurality of keys 11 is changed delicately and are output from between the plurality of keys 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic keyboard instrument such as an electronic piano.

  Conventionally, in an electronic keyboard instrument, as described in Patent Document 1, a keyboard part in which a plurality of keys are arranged is provided in the instrument body, and a speaker is provided in the instrument body behind the keyboard part, There has been known a loudspeaker configured to emit a musical sound corresponding to a key pressing operation of a plurality of keys from the upper part of the rear part of the keyboard part to the outside of the instrument body.

Japanese Patent Laid-Open No. 01-32479

  In this type of electronic keyboard instrument, a keyboard lid that covers the upper part of the keyboard part so that it can be opened and closed is housed in the upper rear part of the instrument body to expose the keyboard part, and a plurality of keys in the exposed keyboard part are depressed. When the musical sound is emitted from the speaker by operating, the musical sound is emitted from between the keyboard lid and the keyboard portion toward the upper front side of the instrument body.

  However, in such a conventional electronic keyboard instrument, since the operation panel is arranged between the keyboard lid and the keyboard part, the sound from the speaker cannot be emitted efficiently and sufficiently, and the inside of the instrument body In addition, the sound emitted from the speaker is slightly changed according to the key pressing operation of a plurality of keys in the keyboard portion, and the sound cannot be emitted between the keys.

  The problem to be solved by the present invention is that an electronic keyboard capable of satisfactorily emitting sound between a plurality of keys by slightly changing a sound generated by a speaker in response to a key pressing operation of a plurality of keys on a keyboard unit Is to provide a musical instrument.

In order to solve the above problems, the present invention includes the following components.
The invention according to claim 1 is a musical instrument main body, a keyboard portion provided in the musical instrument main body and arranged in a state in which a plurality of keys are rotatably mounted on the keyboard chassis in the vertical direction, and the keyboard portion. And a speaker that emits a musical sound into the instrument body in accordance with the switch operation of the switch unit. Each of the keys is provided with an opening for sound emission whose opening state changes in response to a key pressing operation.

  The invention according to claim 2 is the electronic keyboard instrument according to claim 1, wherein the openings are respectively provided on side surfaces facing each other adjacent to each other in the plurality of keys.

  According to a third aspect of the present invention, the plurality of keys include a plurality of white keys and a plurality of black keys, and the openings are respectively provided on front end surfaces of the plurality of white keys. The electronic keyboard instrument according to claim 1 or 2, wherein

  According to a fourth aspect of the present invention, the plurality of keys include a plurality of white keys and a plurality of black keys, and the opening is a partition of the white keys facing the front end surface of the black keys. The electronic keyboard instrument according to any one of claims 1 to 3, wherein the electronic keyboard instrument is provided on both the front face and the front end face of the black key.

  According to a fifth aspect of the present invention, the switch portion is a first contact portion that is first turned on when the key is depressed, and a second contact portion that is turned on after a time difference has elapsed after the first contact portion is turned on. And the speaker starts sounding when the second contact portion of the switch portion is turned on and stops sound generation when the first contact portion is turned off. The opening portion has an opening ratio of about 50% when the first contact portion is turned on / off, and has an opening ratio of about 100 when the second contact portion is turned on / off. The electronic keyboard instrument according to claim 1, wherein the electronic keyboard instrument is a percentage.

  According to a sixth aspect of the present invention, the switch portion is a first contact portion that is first turned on when the key is depressed, and a second contact portion that is turned on after a time difference has elapsed after the first contact portion is turned on. And the speaker starts sounding when the second contact portion of the switch portion is turned on and stops sound generation when the first contact portion is turned off. The opening portion has an opening ratio of about 80% when the first contact portion is turned on / off, and has an opening ratio of about 100 when the second contact portion is turned on / off. The electronic keyboard instrument according to claim 1, wherein the electronic keyboard instrument is a percentage.

  According to a seventh aspect of the present invention, the switch portion is a first contact portion that is first turned on when the key is depressed, and a second contact portion that is turned on after a time difference has elapsed after the first contact portion is turned on. And a third contact portion that is turned on with a slight time lag after the second contact portion is turned on, and the speaker is configured to turn on the third contact portion when the third contact portion of the switch portion is turned on. The sound generation is started with a sound quality corresponding to the time difference from the two contact portions, and the sound generation is stopped when the first contact portion is turned off. The opening ratio is about 30% when one contact portion is turned on / off, the opening ratio is about 60% when the second contact portion is turned on / off, and the third contact portion is turned on / off. The opening ratio becomes almost 100% at the time, It is an electronic keyboard musical instrument of the placement.

  According to the present invention, when a plurality of keys on the keyboard are pressed, the speaker emits a musical sound, and when the emitted musical sound passes through the opening of each key, The opening state of the opening of the key changes, and the musical sound can be subtly changed according to the change of the opening state of the opening. For this reason, the sound generated by the speaker can be slightly changed according to the key pressing operation of the plurality of keys, and the sound can be emitted satisfactorily between the plurality of keys.

It is the front view which showed Embodiment 1 of the electronic keyboard musical instrument to which this invention is applied. It is a top view of the electronic keyboard instrument of FIG. It is an expanded sectional view in the AA arrow of the electronic keyboard musical instrument of FIG. FIG. 4 is an enlarged cross-sectional view showing a state in which a keyboard lid is closed in the electronic keyboard instrument of FIG. 3. FIG. 4 is an enlarged cross-sectional view showing a switch part of FIG. 3. It is the expansion perspective view which showed the principal part in the keyboard part of FIG. FIG. 7 shows the key of FIG. 6, (a) is an enlarged side view showing the white key, and (b) is an enlarged side view showing the black key. It is the figure which showed the relationship between the ON / OFF state of each contact part of a switch part at the time of key pressing operation of the keyboard part of FIG. 6, and the opening ratio of the opening part of a key. In the modification of Embodiment 1, it is the figure which showed the relationship between the ON / OFF state of each contact part of a switch part at the time of key pressing operation of a keyboard part, and the aperture ratio of the opening part of a key. It is the expanded sectional view which showed Embodiment 2 of the electronic keyboard musical instrument to which this invention is applied. It is the expanded sectional view which showed the switch part of FIG. It is the figure which showed the relationship between the ON / OFF state of each contact part of a switch part at the time of key pressing operation of the keyboard part of FIG. 10, and the opening ratio of the opening part of a key. It is the expansion perspective view which showed the principal part of the keyboard part in Embodiment 3 of the electronic keyboard instrument to which this invention is applied. It is the figure which showed the relationship between the ON / OFF state of each contact part of a switch part at the time of key pressing operation of the keyboard part of FIG. 13, and the aperture ratio of the opening part of a key. It is the expansion perspective view which showed the principal part of the keyboard part in Embodiment 4 of the electronic keyboard instrument to which this invention is applied. FIG. 16 is an enlarged cross-sectional view showing a white key and a black key in a state where a black key is pressed on the keyboard portion of FIG. 15. It is the expansion perspective view which showed the white key of FIG.

(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 FIGS. 1 and 2, the electronic keyboard instrument includes a musical instrument main body 1. The musical instrument body 1 is provided with a pair of side plates 2 on both the left and right sides, a bottom plate 3 provided at a position located below the upper end portion between the pair of side plates 2, and a front end portion of the bottom plate 3. The front plate 4, the back plate 5 provided upright at the rear end of the bottom plate 3, the top plate 6 disposed at each upper end of the back plate 5 and the pair of side plates 2, and a pair of side plates The foot pedal 7 provided in the lower end part between 2 is provided.

  In this case, as shown in FIG. 1, the pair of side plates 2 also serve as legs as a stand of the instrument body 1, and as shown in FIG. 3, the front side (left side in FIG. 3) at the upper end thereof. About half are inclined forward and about half of the rear side is formed horizontally. As shown in FIG. 3, the front plate 4 is formed to have a height about half that of the back plate 5. The top plate 6 is attached across the rear horizontal portion of the upper end portions of the pair of side plates 2 and the upper end portion of the back plate 5. As a result, the musical instrument main body 1 has a configuration in which about half of the front side (left side in FIG. 3) is opened upward as shown in FIGS.

  As shown in FIGS. 1 to 4, the keyboard portion 8 is disposed on the bottom plate 3 in the musical instrument main body 1 so as to correspond to the half of the front side opened upward. As shown in FIGS. 3 and 4, the keyboard unit 8 includes a keyboard chassis 10 disposed on the bottom plate 3 of the musical instrument main body 1. The keyboard chassis 10 includes a plurality of keys 11 that are rotatably provided in the vertical direction, and a plurality of hammer members 12 that apply an action load to each key 11 in response to a key pressing operation of the plurality of keys 11. A switch unit 13 that outputs a switch signal in response to each key pressing operation of the plurality of keys 11 and a plurality of light emitting units 14 that respectively irradiate light inside the plurality of keys 11 are provided.

  In this case, as shown in FIGS. 1 to 4, the plurality of keys 11 are composed of a plurality of white keys 11 a and a plurality of black keys 11 b and are formed of a light-transmitting synthetic resin. Attached to each shaft portion 11a of the key support portion 10a provided on the rear upper portion (the upper right portion in FIG. 3) of the keyboard chassis 10 so as to be rotatable in the vertical direction. In this state, as shown in FIG. It has a configuration in which many are arranged.

  As shown in FIGS. 3 and 4, the plurality of hammer members 12 are vertically moved to the shaft portions 12 a of the hammer support portions 10 b provided on the keyboard chassis 10 in a state corresponding to the lower sides of the plurality of keys 11. It is mounted so that it can rotate in any direction. Thereby, when the plurality of hammer members 12 are respectively pushed down in response to the key pressing operation of the plurality of keys 11, each hammer member 12 resists its weight and rotates counterclockwise in FIG. 3 around the shaft portion 12a. The action load is applied to each key 11 by rotating the key 11 to each other.

  Further, as shown in FIG. 3 and FIG. 4, the plurality of hammer members 12 have the rear end portion of the hammer member 12 on the bottom plate 3 of the instrument main body 1 when the key 11 is in an initial state where the key 11 is not depressed. The lower limit position of the hammer member 12 is regulated by coming into contact with the lower limit stopper portion 16 such as felt arranged via the metal mounting plate 15 from above. In this case, the attachment plate 15 is attached below the rear end of the keyboard chassis 10 and is disposed on the bottom plate 3 in the musical instrument main body 1 together with the keyboard chassis 10.

  As shown in FIGS. 3 to 5, the switch unit 13 has a configuration in which a rubber sheet 18 is disposed on a switch substrate 17. In this case, the rubber sheet 18 is formed with a dome-shaped bulging portion 18 a corresponding to the switch pressing portion 19 of the key 11. The dome-shaped bulging portion 18 a is configured to elastically deform and output a switch signal when pressed by the switch pressing portion 19.

  That is, the dome-shaped bulging portion 18a includes first and second contact portions 13a and 13b. As shown in FIG. 5, the first contact portion 13a is provided on the switch substrate 17 so that the first movable contact 18b can be brought into contact with and separated from the first movable contact 18b provided in the dome-shaped bulged portion 18a. 1st fixed contact 18c which contacts. Similarly to the first contact portion 13a, the second contact portion 13b is provided on the switch board 17 and the second movable contact 18d is contacted and separated from the second movable contact 18d provided in the dome-shaped bulged portion 18a. And a second fixed contact 18e that comes into contact with each other.

  In this case, as shown in FIG. 5, in the first contact portion 13a, the distance between the first movable contact 18b and the first fixed contact 18c is such that the second movable contact 18d and the second fixed contact 18e in the second contact portion 13b. It is set shorter than the interval. Thus, the first contact portion 13a is configured to be turned on earlier than the second contact portion 13b when the key 11 is pressed.

  In the second contact portion 13b, the distance between the second movable contact 18d and the second fixed contact 18e is set longer than the distance between the first movable contact 18b and the first fixed contact 18c in the first contact portion 13a. ing. Thus, the second contact portion 13b is configured to turn on later than the first contact portion 13a when the key 11 is depressed.

  Accordingly, the switch unit 13 is configured such that when the key 11 is pressed, the first contact part 13a is turned on first, and thereafter, the second contact part 13b is turned on with a time difference. Yes. Further, when the switch unit 13 returns to the initial position after the key 11 is pressed, the second contact portion 13b is first turned off, and thereafter, the first contact portion 13a is turned off with a time difference. Is configured to do.

  The plurality of light emitting units 14 are each composed of a light emitting element such as a light emitting diode (LED), and as shown in FIGS. 3 and 4, the white keys 11 a and the black keys 11 b that are the plurality of keys 11 on the keyboard chassis 10. Are provided corresponding to each front side. In this case, the light emitting unit 14 corresponding to the white key 11a is provided in the upper part on the front side of the keyboard chassis 10, and is configured to irradiate light on the inside of the front side of the white key 11a.

  Moreover, the light emission part 14 corresponding to the black key 11b is provided in the upper part in the intermediate part of the keyboard chassis 10, and is comprised so that light may be irradiated to the front side inside of the black key 11b. As a result, the plurality of light emitting units 14 irradiate the front side of each key 11 with the emitted light, and the emitted light passes through each key 11, so that each key 11 has a key press operation. Each of the front sides is configured to shine.

  By the way, as shown in FIGS. 3 and 4, the musical instrument main body 1 is provided with a slidable keyboard lid 20 that covers the upper side of the keyboard portion 8 so as to be freely opened and closed. As shown in FIG. 4, the keyboard cover 20 is arranged above the keyboard unit 8 to cover the keyboard unit 8 when the keyboard unit 8 is not operated, and when the keyboard unit 8 is operated, as shown in FIG. 3. Thus, the keyboard portion 8 is exposed by being housed on the rear side (right side in FIG. 3) in the musical instrument main body 1.

  That is, the keyboard lid 20 is divided into a front lid 20a and a rear lid 20b, and the divided front lid 20a and rear lid 20b are connected to each other by a connecting portion 21 so as to be rotatable in the vertical direction. Yes. In this case, as shown in FIGS. 3 and 4, a front guide shaft 22 is provided at a front end portion (left end portion in FIG. 3) of the front lid 20 a and a handle portion for opening and closing the keyboard lid 20. 23 is provided. A rear guide shaft 24 is provided at the rear end portion (right end portion in FIG. 3) of the rear lid 20b, and a pinion gear 25 is rotatably attached to the rear guide shaft 24. .

  Further, as shown in FIGS. 3 and 4, the front guide shaft 22 provided on the front cover 20 a of the keyboard cover 20 is provided on the front upper part (the upper left part in FIG. 3) on the inner surfaces of the pair of side plates 2 in the instrument body 1. The front side guide part 26 which guides slidably is provided. This front side guide part 26 is a groove part provided in the inner surface of a pair of side plate 2 along the front-back direction (FIG. 3 left-right direction).

  Further, on the rear upper side (upper right side in FIG. 3) on the inner surfaces of the pair of side plates 2 in the instrument body 1, as shown in FIGS. 3 and 4, a rear guide provided on the rear lid 20b of the keyboard lid 20 is provided. A rear guide portion 27 that slidably guides the shaft 24 is provided so as to be inclined in a state of being curved in an arc shape in a rear downward direction (lower right in FIG. 3). The rear guide portion 27 is provided with a rack gear 28 that meshes with the pinion gear 25 and rolls along the rear guide portion 27.

  Thereby, as shown in FIG. 4, the keyboard lid 20 moves the handle 23 to the front side (left side in FIG. 4) of the musical instrument main body 1 and positions the front guide shaft 22 at the front end of the front guide portion 26. The rear guide shaft 24 is positioned at the front upper portion of the rear guide portion 27, and the pinion gear 25 is positioned at the front upper portion of the rack gear 28. Thereby, the keyboard lid 20 is configured to cover the upper side of the keyboard portion 8 in a state where the front lid 20a and the rear lid 20b are inclined forward and downward.

  Further, as shown in FIGS. 3 and 4, when the keyboard cover 20 is moved to the rear side (right side in FIG. 4) while lifting the handle portion 23, the front guide shaft 22 is moved to the front guide portion 26. The pinion gear 25 meshes with the rack gear 28 and rolls rearward while the rear guide shaft 24 moves rearward along the rear guide portion 27. .

  At this time, the keyboard unit 20 moves rearward as the pinion gear 25 moves obliquely downward along the rack gear 28 and the rear guide shaft 24 moves obliquely downward along the rear guide portion 27. The lid 20b is configured to move toward an obliquely rear lower portion (lower right portion in FIG. 4) while being gradually bent around the connecting portion 21 with respect to the front lid 20a.

  Further, as shown in FIG. 3, the keyboard lid 20 has the rear guide shaft 24 positioned at the lower rear end of the rear guide portion 27 (lower right end in FIG. 3) and the pinion gear 25 at the rear end of the rack gear 28. When located at the lower part, the rear lid 20b is configured to stand up behind the keyboard part 8 in the musical instrument main body 1.

  At this time, as shown in FIG. 3, in the keyboard lid 20, the front guide shaft 22 of the front lid 20a is positioned at the rear end portion (right end portion in FIG. 3) of the front guide portion 26, and in this state, the front lid 20a The front lid 20a is held by the front guide shaft 22, and the rear portion of the front lid 20a is held by the front end portion (the upper end portion in FIG. 3) of the rear lid 20b. Are arranged so as to be substantially parallel to each other, and the keyboard portion 8 is exposed upward.

  By the way, as shown in FIG. 1, speaker portions 30 are respectively provided on both sides of the lower portion of the bottom plate 3 in the instrument body 1. As shown in FIGS. 3 and 4, the speaker unit 30 includes a speaker box 31 that surrounds a sound emission port 33 provided on the bottom plate 3 of the musical instrument main body 1, and a speaker 32 that is disposed in the speaker box 31. I have.

  As shown in FIGS. 3 to 5, the speaker box 31 is formed in a box shape whose upper surface is opened upward. In this case, the front surface (left surface in FIG. 3) of the speaker box 31 is inclined obliquely upward, and a large number of slit-like sound emitting holes 31a that are elongated in the vertical direction are provided on the outer surface of the speaker box 31. It has been. The speaker box 31 is attached to the lower surface of the bottom plate 3 so as to surround a sound emission port 33 provided on the bottom plate 3 of the musical instrument main body 1.

  As shown in FIGS. 1, 3, and 4, the speaker 32 has dust-proof net members 34 on both sides of the bottom surface of the bottom plate 3 with the baffle surface side (upper surface side in FIG. 3) that generates sound facing upward. Is attached through. As a result, most of the sound generated by the speaker 32 is emitted into the instrument body 1 through the sound emission port 33 of the bottom plate 3, and the remaining sound is emitted from the sound emission holes 31 a of the speaker box 31 to the bottom plate 3. The sound is emitted to the lower side.

  In this case, as shown in FIGS. 3 and 4, the sound emission ports 33 of the bottom plate 3 are through-holes opened to the inside and the outside of the musical instrument main body 1, and are provided on both sides of the bottom plate 3. As shown in FIGS. 3 and 4, ribs 33 a for arranging the lower limit stopper portion 16 of the hammer member 12 are provided on the sound emission port 33 along the arrangement direction of the keys 11. .

  The dust-proof net member 34 is a punch net having a dust-proof function in which a large number of small holes are formed in a metal plate by punching. 3 are attached to both sides of the lower surface. As a result, the dust-proof net member 34 has a dust-proof function to prevent foreign matters such as dust from entering the speaker 32, and also reinforces the strength of the bottom plate 3 and the rib 33a where the sound emission port 33 is provided. It has a structure that also has a reinforcing function.

  On the other hand, as shown in FIGS. 6 and 7, the plurality of keys 11 in the keyboard unit 8 are each provided with a plurality of openings 35 whose opening states change according to the key pressing operation. The plurality of openings 35 are respectively provided on the side surfaces of the plurality of keys 11 facing each other adjacent to each other. That is, as shown in FIG. 6 and FIG. 7, the plurality of openings 35 are provided on each side of the white key 11a and the black key 11b where the white key 11a and the black key 11b face each other, and between the white keys 11a. It is provided at each side of the facing white key 11a.

  In this case, the opening 35 provided on the side surface of the white key 11a among the portions of the side surfaces of the white key 11a and the black key 11b where the white key 11a and the black key 11b face each other is illustrated in FIG. As shown, the adjacent black key 11b is in an initial state where the key is not pressed, and is hidden by the side surface of the adjacent black key 11b so that the adjacent black key 11b is closed. Further, as shown in FIG. 7A, the opening 35 provided on the side surface of the white key 11a gradually increases in opening amount when the adjacent black key 11b is depressed, and the adjacent black key The opening is maximized when the key 11b is pressed most deeply.

  Further, among the portions of the side surfaces of the white key 11a and the black key 11b where the white key 11a and the black key 11b face each other, the opening 35 provided on the side surface of the black key 11b is shown in FIGS. In the initial state where the adjacent white key 11a is not pressed, the adjacent white key 11a is concealed by the side surface of the adjacent white key 11a so as to be closed. Further, as shown in FIGS. 6 and 7B, the opening 35 provided on the side surface of the black key 11b gradually increases in opening amount when the adjacent white key 11a is pressed. When the adjacent white key 11a is pressed most deeply, the opening amount is maximized.

  In addition, each opening 35 provided on each side surface of the white key 11a where the white keys 11a face each other is in an initial state where the adjacent white key 11a is not pressed as shown in FIGS. 6 and 7A. In such a state, it is configured to be in a closed state by being hidden by the side surface of the adjacent white key 11a. Further, as shown in FIGS. 6 and 7A, the opening 35 provided on the side surface of the white key 11a gradually increases in opening amount when the adjacent white key 11a is pressed. When the adjacent white key 11a is pressed most deeply, the opening amount is maximized.

  In this case, the opening portions 35 provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11 are hidden so that the opening portions 35 are not visible from the outside even if the opening portions 35 are exposed during the key pressing operation. A sheet (not shown) through which sound such as a non-woven fabric is passed may be attached to the side of each key 11.

  Further, as shown in FIG. 8, the openings 35 provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11 turn on the first contact portion 13a of the switch portion 13 when the key 11 is depressed. When the first contact portion 13a is turned on, the aperture ratio becomes about 50%. When the second contact portion 13b is turned on with a time lag after the first contact portion 13a is turned on, the opening ratio is almost 100%. In this case, each opening 35 is formed in a state in which the vertical length and the width that is the length in the front-rear direction are adjusted in accordance with the performance of the speaker 32 and the internal sound in the musical instrument main body 1.

  When the second contact portion 13b is turned on with a time difference after the key 11 is pressed and the first contact portion 13a is first turned on, the switch portion 13 has a volume and sound quality corresponding to the time difference. When the first contact portion 13a is turned off with a time lag after the second contact portion 13b is turned off when the key 11 returns to the initial position. The tone generation from the speaker 32 is stopped.

  For this reason, as shown in FIG. 8, the opening portions 35 provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11 are first turned on when the key 11 is depressed. In this case, the aperture ratio becomes about 50%, and then the aperture ratio becomes almost 100% when the second contact portion 13b is turned on with a time lag and the sound generation of the musical sound from the speaker 32 is started. It is configured as follows.

  Further, the openings 35 provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11 turn off the second contact portion 13b when the key 11 is returned to the initial position after being pressed. Even after that, the aperture ratio is maintained at almost 100%, and thereafter, while the first contact portion 13a is turned off with a time difference, the aperture ratio gradually decreases, and the first contact portion 13a is turned off, When the tone generation from the speaker 32 is stopped, the aperture ratio is set to about 50%.

Next, the case where this electronic keyboard instrument is used will be described.
First, as shown in FIG. 4, the keyboard cover 20 covering the upper side of the keyboard part 8 is opened as shown in FIG. 3, and the keyboard part 8 is exposed. At this time, the handle 23 provided at the front end of the front lid 20a is lifted and moved to the rear side (right side in FIG. 4) of the instrument body 1. Then, the front guide shaft 22 moves rearward along the front guide portion 26, and the rear guide shaft 24 moves rearward along the rear guide portion 27 while the pinion gear 25 meshes with the rack gear 28 and moves rearward. Roll towards.

  As shown in FIG. 3, the rear guide shaft 24 is held at the lower rear end of the rear guide portion 27 (lower right end in FIG. 3), and the pinion gear 25 is rear end of the rack gear 28. When held at the lower portion, the rear lid 20 b stands behind the keyboard portion 8 in the instrument main body 1. Further, as shown in FIG. 3, the front lid 20a is held by the front guide shaft 22 and the rear portion of the front lid 20a is held by the front end portion (upper end portion in FIG. 3) of the rear lid 20b. Thus, the front lid 20a approaches the lower side of the top plate 6 and is arranged substantially in parallel. As a result, the keyboard cover 20 is housed on the rear side of the musical instrument main body 1 in a state of being bent at a substantially right angle, and the keyboard part 8 is exposed on the upper front side of the musical instrument main body 1.

  In this state, when the keyboard section 8 is depressed to perform a performance, the speaker 32 emits a performance sound in response to the key depression operation. At this time, most of the performance sound produced by the speaker 32 is emitted from the sound emission port 33 provided on the bottom plate 3 of the musical instrument main body 1 into the musical instrument main body 1, and the emitted performance sound is emitted from the keyboard portion. Sound is emitted from the 8 side toward the front outside of the instrument body 1.

  In this case, most of the performance sound emitted in the musical instrument main body 1 passes through the inside of the keyboard chassis 10 of the keyboard unit 8, passes through the gaps of the plurality of keys 11 in the keyboard unit 8, and is oblique to the keyboard unit 8. Sound is emitted toward the front upper side. At this time, when the plurality of keys 11 in the keyboard portion 8 are depressed and the first contact portion 13a is first turned on, the opening ratio of the opening portion 35 provided in the key 11 becomes about 50%. Later, when the second contact portion 13b is turned on with a time lag and the sound generation from the speaker 32 is started, the opening ratio of the opening 35 becomes almost 100%.

  For this reason, the performance sound that passes through the gaps of the plurality of keys 11 in the keyboard portion 8 is pressed because the opening portion 35 of the key 11 adjacent to the pressed key 11 has an opening ratio of approximately 100%. The sound is satisfactorily emitted as a bright sound from the opening 35 of the key 11 adjacent to the key 11 toward the upper front side of the keyboard 8 diagonally forward. In this state, when the key 11 is further pressed and returned to the initial position, even if the second contact portion 13b is turned off, the aperture ratio is maintained at almost 100%. Good sound is emitted toward the upper front side of the keyboard portion 8 diagonally.

  Thereafter, until the second contact portion 13b is turned off, the first contact portion 13a is turned off with a time lag, and the sound of the performance sound from the speaker 32 is stopped, the aperture ratio of the opening 35 is increased. When the second contact portion 13b is turned off gradually, the opening ratio of the opening 35 becomes about 50%. At this time, since the aperture ratio of the opening 35 changes between 100% and 50%, the volume and quality of the musical sound can be controlled by the change in the aperture ratio of the opening 35. For this reason, the tone color of the performance sound can be changed slightly according to the change in the aperture ratio of the opening 35, and the volume and the sound volume according to the player's key pressing operation can be set rather than the performance sound generated by the speaker 32. Sound quality performance sound can be faithfully reproduced.

  Of the performance sounds emitted from the speaker 32 in the instrument body 1, the remaining performance sounds that pass through the keyboard chassis 10 of the keyboard unit 8 and do not pass between the plurality of keys 11 are stored in the instrument body 1. Reflected by the keyboard lid 20 housed on the rear side and bent at a substantially right angle, sound is emitted from the upper side of the keyboard portion 8 toward the front side of the musical instrument main body 1, and the keyboard lid 20 and the back plate 5 of the musical instrument main body 1 are emitted. The sound is emitted from above the keyboard portion 8 toward the front side of the musical instrument main body 1 through the gap 6 with the top plate 6.

  Further, the remaining performance sounds that are generated by the speaker 32 and are not emitted into the instrument main body 1 are emitted from the sound emission holes 31 a of the speaker box 31 toward the lower side of the bottom plate 3 of the instrument main body 1. , It will be heard by the performer from around his feet. As a result, the performance sound generated by the speaker 32 is emitted from the keyboard section 8 side of the musical instrument body 1 to the front side of the musical instrument body 1 and to the lower side of the bottom plate 3 of the musical instrument body 1. Both the performance sound and the performance sound are heard by the performer as if they were being emitted from the entire instrument.

  As described above, according to this electronic keyboard instrument, the keyboard body 1 and the keyboard provided in the instrument body 1 and arranged in a state in which a plurality of keys 11 are mounted on the keyboard chassis 10 so as to be rotatable in the vertical direction. Unit 8, a switch unit 13 that performs a switch operation in response to a key pressing operation of a plurality of keys 11 in the keyboard unit 8, and a speaker that emits musical sounds into the instrument body 1 in accordance with the switch operation of the switch unit 13 32, and a plurality of keys 11 in the keyboard unit 8 are provided with sound emitting openings 35 whose opening state changes according to the key pressing operation. In response to this, the sound generated by the speaker 32 can be subtly changed so that the sound can be emitted satisfactorily from among the plurality of keys 11.

  In other words, according to this electronic keyboard instrument, a plurality of keys 11 in the keyboard section 8 are pressed and the speaker 32 emits musical sounds into the instrument body 1, and most of the musical sounds are the keyboard chassis 10 of the keyboard section 8. When the sound is emitted from between the keys 11 through the openings 35 of the plurality of keys 11 in the keyboard unit 8, the opening amount of the opening 35 of the key 11 changes according to the key depression operation. Therefore, it is possible to change the musical tone slightly according to the change of the opening state in the opening 35 of each key 11. For this reason, it is possible to finely change the sound generated by the speaker 32 in response to the key pressing operation of the plurality of keys 11 and to emit sound favorably toward the performer from between the plurality of keys 11.

  In this case, since the openings 35 are respectively provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11, the openings are opened by the side surfaces of the adjacent keys 11 in the initial state where the adjacent keys 11 are not pressed. The part 35 can be concealed, so that an appearance-preferred one can be obtained. Further, when the key 11 is pressed, the opening 35 of the key 11 adjacent to the key 11 can be exposed, and the opening amount of the exposed opening 35 can be changed according to the key pressing operation. As a result, it is possible to control the volume and quality of the musical sound that passes through the opening 35, so that the timbre of the musical sound can be subtly changed, and the musical tone generated by the speaker 32 can be depressed more easily by the performer. It is possible to faithfully reproduce the musical sound with the corresponding volume and sound quality.

  The switch unit 13 includes a first contact part 13a that is turned on first when the key 11 is depressed, and a second contact part 13b that is turned on after a time difference has elapsed after the first contact part 13a is turned on. The speaker 32 starts sounding when the second contact portion 13b of the switch portion 13 is turned on, and stops sounding when the first contact portion 13a is turned off. The opening 35 has an opening ratio of about 50% when the first contact portion 13a is turned on, and an opening ratio of almost 100% when the second contact portion 13b is turned on. Since the aperture ratio can be changed between an aperture ratio of approximately 100% and an aperture ratio of approximately 50%, the tone color of the musical sound emitted from the speaker 32 is slightly changed when an expert performs. be able to.

  That is, when a plurality of keys 11 in the keyboard portion 8 are pressed and the first contact portion 13a is first turned on, the opening ratio of the opening portion 35 provided in the key 11 becomes about 50%. Later, when the second contact portion 13b is turned on with a time lag and the sound generation of the musical sound from the speaker 32 is started, the opening ratio of the opening 35 becomes almost 100%. The performance sound passing through each of the 11 openings 35 can be emitted with a bright sound from the opening 35 of the key 11 adjacent to the depressed key 11 toward the upper front side of the keyboard portion 8 with a bright sound.

  In this state, when the key 11 is further pressed and returned to the initial position, the aperture ratio is maintained at almost 100% even when the second contact portion 13b is turned off. Sound can be emitted favorably toward the upper front side of the keyboard portion 8 diagonally. Thereafter, until the second contact portion 13b is turned off, the first contact portion 13a is turned off with a time lag, and the sound of the performance sound from the speaker 32 is stopped, the aperture ratio of the opening 35 is increased. When the second contact portion 13b is turned off, the opening ratio of the opening 35 becomes about 50%.

For this reason, since the opening ratio of the opening 35 can be changed between 100% and 50%, the volume and tone quality of the musical sound passing through the opening 35 can be controlled according to the change in the opening amount of the opening 35. It becomes possible. Thereby, when the skilled person performs, the tone color of the musical sound generated by the speaker 32 can be changed slightly, so that the volume corresponding to the key pressing operation by the performer rather than the musical sound generated by the speaker 32. In addition, it is possible to faithfully reproduce musical tones of sound quality, thereby improving the expressiveness of the performance.

  In the first embodiment described above, the aperture ratio of the opening 35 is about 50% when the first contact portion 13a of the switch portion 13 is turned on, and is almost 100% when the second contact portion 13b is turned on. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 9, when the first contact portion 13a of the switch portion 13 is turned on, the aperture ratio becomes about 80%. You may comprise so that an aperture ratio may become almost 100%, when the 2 contact part 13b turns on.

  With this configuration, when the key 11 is pressed and the first contact portion 13a of the switch portion 13 is turned on, the opening ratio of the opening portion 35 is about 80%, and the second contact portion 13b is When the switch is turned on, the aperture ratio becomes approximately 100%, so that the aperture ratio can be changed between the aperture ratio of approximately 100% and the aperture ratio of approximately 80%, and the amount of change can be reduced. . Thereby, when a performer performs, since the change of the tone color of the musical sound emitted from the speaker 32 can be suppressed small, even a beginner can perform well.

(Embodiment 2)
Next, a second embodiment of the 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. 10 and 11, the electronic keyboard instrument has a configuration in which the switch unit 40 is different from that of the first embodiment, and the configuration other than this is substantially the same as that of the first embodiment.

  That is, as shown in FIG. 10 and FIG. 11, the switch unit 40 rotates when the key 11 is pressed, and the first switch 41 that is switched by the key 11 and the key 11 is pressed. And a second switch 42 that is switched by the hammer member 12. The switch unit 40 is configured such that when the key 11 is depressed, the first switch 41 is first turned on by the key 11, and after the first switch 41 is turned on, the second switch 42 is turned on with a time lag. It is configured to be turned on by the member 12.

  As shown in FIG. 11, the first switch 41 has a configuration in which a rubber sheet 43 is provided on the switch substrate 17. In this case, the rubber sheet 43 is formed with a dome-shaped bulging portion 44 corresponding to the switch pressing portion 19 of the key 11. The dome-shaped bulged portion 44 includes a first contact portion 40a, and is configured to be elastically deformed to turn on the first contact portion 40a when pressed by the switch pressing portion 19. That is, as shown in FIG. 11, the first contact portion 40a includes a first movable contact 44a provided in the dome-shaped bulged portion 44 and a first movable contact 44a provided on the switch substrate 17. And a first fixed contact 44b that comes in contact with and separable from.

  Further, as shown in FIG. 11, the second switch portion 42 has a configuration in which a rubber sheet 45 is disposed on the lower surface of the switch substrate 17. In this case, the rubber sheet 45 is formed with dome-shaped bulging portions 46 corresponding to the switch pressing portions 47 of the hammer member 12, respectively. The dome-shaped bulging portion 46 includes second and third contact portions 40b and 40c, and is elastically deformed when pressed by the switch pressing portion 47 of the hammer member 12, so that the second and third contact portions 40b and 40c are pressed. Each contact part 40b, 40c is configured to be sequentially turned on.

  That is, as shown in FIG. 11, the second contact portion 40b includes a second movable contact 46a provided in the dome-shaped bulge portion 46 and a second movable contact 46a provided on the lower surface of the switch substrate 17. And a second fixed contact 46b that comes into contact with and separable from each other. Similarly to the second contact portion 40b, the third contact portion 40c is provided on the lower surface of the switch substrate 17 and the third movable contact 46c is in contact with the third movable contact 46c provided in the dome-shaped bulge portion 46. And a third fixed contact 46d that comes into contact with the separable member.

  In this case, as shown in FIG. 11, in the second contact portion 40b, the distance between the second movable contact 45a and the second fixed contact 46b is such that the third movable contact 46c and the third fixed contact 46d in the third contact portion 40c. It is set shorter than the interval. The second contact portion 40b is configured to be turned on earlier than the third contact portion 40c.

  The third contact portion 40c is set such that the distance between the third movable contact 46c and the third fixed contact 46d is longer than the distance between the second movable contact 46a and the second fixed contact 46b in the second contact portion 40b. ing. The third contact portion 40c is configured to turn on later than the second contact portion 40b. Accordingly, when the hammer member 12 is rotated by the key pressing operation of the key 11 and is pressed by the switch pressing portion 47, the second switch 42 is first turned on, and then the second switch 42 is slightly turned on. The third contact portion 40c is configured to be turned on with a sufficient time difference.

  As a result, when the key 11 is depressed, the switch unit 40 firstly pushes the first switch 41 by the switch pressing unit 19 of the key 11 to turn on the first contact unit 40a. After the switch 40a is turned on, the second switch 42 is pressed by the switch pressing portion 47 of the hammer member 12 that rotates in response to the key pressing operation of the key 11, and first, the second contact portion 40b of the second switch 42 is turned on. Later, the third contact portion 40c of the second switch 42 is turned on with a slight time difference.

  Further, the switch portion 40 is a hammer that is turned on by the key pressing operation of the key 11 and the first contact portion 40a is first turned on by the switch pressing portion 19 of the key 11, and then rotates in response to the key pressing operation of the key 11. After the second contact portion 40b is turned on by the switch pressing portion 47 of the member 12, when the third contact portion 40c is turned on with a slight time difference, it corresponds to the time difference between the second contact portion 40b and the third contact portion 40c. It is configured to start the sound generation of the musical sound from the speaker 32 with the volume and the sound quality.

  Further, the switch unit 40 is configured such that when the depressed key 11 returns toward the initial position, the switch pressing unit 47 of the hammer member 12 moves away from the second switch 42 and the third contact unit 40c and the second contact unit 40c. After the contact portion 40b is sequentially turned off in this order, when the switch pressing portion 19 of the key 11 is separated from the first switch 41 and the first contact portion 40a is turned off, the tone generation from the speaker 32 is stopped. It is configured.

  For this reason, as shown in FIG. 12, the openings 35 provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11 are first turned on when the key 11 is depressed. At this time, the aperture ratio becomes about 30%, and thereafter, when the second contact portion 40b is turned on, the aperture ratio becomes about 60%, and thereafter, the third contact portion 40c with a slight time difference. When the tone is turned on and the sound generation of the musical sound from the speaker 32 is started, the aperture ratio is configured to be almost 100%.

  In addition, the openings 35 provided on the side faces facing each other in the plurality of keys 11 are arranged so that the key 11 is in an initial state after the third contact portion 40c is turned on and the sound of the musical sound from the speaker 32 is started. When returning to the position, contrary to the case described above, when the third contact portion 40c is turned off, the aperture ratio starts to gradually decrease from about 100%, and when the second contact portion 40b is turned off, the opening is opened. When the rate drops to 60%, the first contact point 40a is turned off, and the tone generation from the speaker 32 is stopped, the aperture ratio becomes about 30%.

  According to such an electronic keyboard instrument, in addition to the same function and effect as in the first embodiment, the switch unit 40 is first turned on when the key 11 is depressed, and the first contact point. A second contact portion 40b that is turned on after the portion 40a is turned on, and a third contact portion 40c that is turned on with a slight time lag after the second contact portion 40b is turned on. When the third contact portion 40c of 40 is turned on, the sound generation starts with a sound volume and sound quality corresponding to the time difference from the second contact portion 40b, and when the first contact portion 40a is turned off, The opening 35 has an opening ratio of about 30% when the first contact portion 40a is turned on, and an opening ratio of about 60% when the second contact portion 40b is turned on. When the three contact portion 40c is turned on, the aperture ratio is approximately 10 By become%, when the skilled person play can be very subtle changes in tone of a tone which is output from the speaker 32.

  That is, the openings 35 provided on the side surfaces facing each other adjacent to each other in the plurality of keys 11 are, as shown in FIG. 12, when the key 11 is pressed and the first contact portion 40a is first turned on. When the second contact portion 40b is turned on after that, the opening ratio becomes about 60%. After that, the third contact portion 40c is turned on after a slight time difference. When the sound of the musical sound from the speaker 32 is started, the aperture ratio becomes almost 100%, so that the performance sound that passes through the openings 35 of the plurality of keys 11 in the keyboard portion 8 is the same as in the first embodiment. Thus, a bright sound can be emitted satisfactorily from the opening 35 of the key 11 adjacent to the depressed key 11 toward the upper front side of the keyboard unit 8 diagonally.

  In this state, when the third contact portion 40c is turned off when returning to the initial position after the key 11 is further pressed, the aperture ratio starts to gradually decrease from almost 100%, and the second contact portion 40b When turned off, the aperture ratio decreases to 60%, and further, the aperture ratio of the aperture 35 gradually decreases until the first contact 40a is turned off and the sound of the performance sound from the speaker 32 is stopped. When the first contact portion 40a is turned off, the opening ratio of the opening 35 becomes about 30%, so that the opening ratio can be largely changed between 100% and 30%, which allows an expert to perform. In this case, since the range for controlling the volume and quality of the musical sound that passes through the opening 35 is widened, the timbre of the musical sound generated by the speaker 32 can be changed very delicately, and therefore, further than in the first embodiment. Expressive Can be raised.

(Embodiment 3)
Next, a third embodiment of the electronic keyboard instrument to which the present invention is applied will be described with reference to FIGS. In this case, the same portions as those in the second embodiment shown in FIGS.
As shown in FIG. 13, this electronic keyboard instrument has a configuration in which an opening 35a is also provided on the front end surface of the white key 11a among the plurality of keys 11 in the keyboard unit 8, and the rest is almost the same as in the second embodiment. It has the same configuration.

  That is, as shown in FIG. 13, the front end surface of the white key 11a is exposed above the front plate 4 of the instrument body 1 when the white key 11a is not pressed, and the white key 11a is pressed. It is configured to gradually hide behind the front plate 4 of the instrument body 1 when being locked. For this reason, the opening 35a provided on the front end surface of the white key 11a is configured such that the opening ratio is approximately 100% in an initial state where the white key 11a is not depressed.

  Further, the opening 35a provided in the front end surface of the white key 11a is gradually hidden behind the front plate 4 of the musical instrument main body 1 and closed when the white key 11a is depressed. Therefore, the aperture ratio is gradually lowered to almost 0%. Also in this case, the opening 35a provided in the front end surface of the white key 11a has a vertical length and a width that is the length in the front-rear direction depending on the performance of the speaker 32 and the internal sound in the instrument main body 1. It is formed in an adjusted state.

  Similarly to the second embodiment, the switch unit 40 is switched by the first switch 41 that performs a switch operation by the key 11 when the key 11 is pressed and the hammer member 12 that rotates in response to the key press operation of the key 11. And a second switch 42 that operates. That is, in the switch unit 40, when the key 11 is pressed, the first switch 41 is first turned on by the key 11, and after the first switch 41 is turned on, the second switch 42 is left with a time difference. Is configured to be turned on by the hammer member 12.

  Accordingly, in the switch unit 40, as in the second embodiment, the key 11 is depressed and the first contact point 40a is first turned on by the switch depressing unit 19 of the key 11. Thereafter, the key depressing of the key 11 is performed. After the second contact portion 40b is turned on by the switch pressing portion 47 of the hammer member 12 that rotates with the operation, when the third contact portion 40c is turned on with a slight time difference, the sound of the musical sound from the speaker 32 is started. After that, when the key 11 returns toward the initial position, the third contact 40c and the second contact 40b are sequentially turned off in that order, and then the first contact 40a is turned off. It is configured to stop the pronunciation of musical sounds.

  In this case, the opening 35a provided on the front end surface of the white key 11a in the plurality of keys 11 has an opening ratio of approximately 100 when the white key 11a is not depressed as shown in FIG. %, When the first contact portion 40a is turned on when the key 11 is pressed, the opening ratio becomes about 50%, and thereafter the opening ratio gradually increases until the second contact portion 40b is turned on. When the second contact portion 40b is turned on, the aperture ratio is configured to be substantially 0%.

  For this reason, the opening 35a provided in the front end surface of the white key 11a is returned to the initial position after the third contact portion 40c is turned on and the sound of the musical sound from the speaker 32 is started. Then, until the third contact portion 40c and the second contact portion 40b are turned off, the aperture ratio is maintained at approximately 0%, and when the second contact portion 40b is turned off, the aperture ratio is gradually increased, When the first contact portion 40a is turned off and the tone generation from the speaker 32 is stopped, the aperture ratio becomes about 50%, and when the white key 11a returns to the initial position, the aperture ratio is almost 100. It is configured to be%.

  According to such an electronic keyboard instrument, in addition to the same effects as those of the second embodiment, the switch part 40 is first turned on when the key 11 is depressed, and the first contact part. A second contact portion 40b that is turned on after 40a is turned on, and a third contact portion 40c that is turned on with a slight time lag after the second contact portion 40b is turned on, and is provided on the front end surface of the white key 11a. In the initial state where the white key 11a is not depressed, the provided opening 35a maintains an opening ratio of almost 100% until the white key 11a is depressed and the first contact portion 40a is turned on. The aperture ratio gradually decreases to about 50%, and then, when the second contact portion 40b is turned on, the aperture ratio becomes almost 0%. Change the tone of the musical tone in a complex and subtle manner Door can be.

  That is, as shown in FIG. 14, the opening portions 35 provided on the side surfaces facing each other in the plurality of keys 11 are operated until the second contact portion 40b is turned on by the key 11 being depressed. The opening ratio gradually increases to about 60%, and the opening 35a provided on the front end surface of the white key 11a gradually decreases from 100% until the second contact portion 40b is turned on. Since it becomes 0%, the aperture ratios of the opening 35 provided on the side surface of the key 11 and the opening 35a provided on the front end surface of the white key 11a change so as to cancel each other.

  In addition, after the second contact portion 40b is turned on, the opening ratio of both the opening 35 provided on the side surface of the key 11 and the opening 35a provided on the front end surface of the white key 11a is It depends only on the change in the aperture ratio of the opening 35 provided on the side surface. Then, when the third contact portion 40c is turned on with a slight time difference after the second contact portion 40b is turned on, the sound generation of the musical sound from the speaker 32 is started.

  At this time, since the opening ratio of the opening 35 provided on the side surface of the key 11 is changed from about 60% to almost 100%, the performance sound passing through the openings 35 and 35a of the plurality of keys 11 in the keyboard portion 8 is An obliquely upper front side of the keyboard portion 8 by an opening 35 provided on the side surface of the key 11 adjacent to the key 11 pressed and an opening 35a provided on the front end surface of the non-keyed white key 11a. The sound can be emitted well with a bright sound toward.

  In this state, when the third contact portion 40c is turned off when the key 11 is returned to the initial position after being further pressed, the opening ratio of the opening 35 provided on the side surface of the key 11 is almost 100%. When the second contact portion 40b is turned off gradually, the aperture ratio is decreased to 60%, and the aperture ratio of the aperture 35a provided on the front end surface of the white key 11a is maintained at approximately 0%. Depending on only the change in the aperture ratio of the opening 35 provided on the side surface of the key 11, the timbre of the performance sound from the speaker 32 can be subtly changed by the change in the aperture ratio as in the second embodiment. .

  Thereafter, the opening ratio of the opening 35 provided on the side surface of the key 11 is changed from about 60% to about 30% until the first contact 40a is turned off and the sound of the performance sound by the speaker 32 is stopped. At the same time, the aperture ratio of the opening 35a provided on the front end surface of the white key 11a increases from approximately 0% to approximately 50%.

  For this reason, the opening ratios of the opening 35 provided on the side surface of the key 11 and the opening 35a provided on the front end surface of the white key 11a change so that the opening amounts of both of them cancel each other. Therefore, the tone color of the performance sound from the speaker 32 can be changed in a complicated and delicate manner. For example, it is possible to prevent the impact sound from being overlapped in a short time and making it difficult to hear the musical sound when the same key 11 is continuously pressed.

(Embodiment 4)
Next, Embodiment 4 of an electronic keyboard instrument to which the present invention is applied will be described with reference to FIGS. In this case, the same portions as those in the first embodiment shown in FIGS.
As shown in FIG. 16, this electronic keyboard instrument has a plurality of keys 11 in the keyboard unit 8 on both the partition surface 50 of the white key 11a and the front end surface of the black key 11b, which face the front end surface of the black key 11b. Also, the openings 35b and 35c are respectively provided, and the other configurations are substantially the same as those of the first embodiment.

  That is, as shown in FIGS. 15 and 16, the opening 35c provided in the front end surface of the black key 11b is a partition surface of the adjacent white key 11a in an initial state where the adjacent white key 11a is not pressed. By being hidden by 50, it is configured to be in a closed state. Further, as shown in FIG. 15 and FIG. 16, the opening 35c provided on the front end surface of the black key 11b gradually increases in opening amount when the adjacent white key 11a is depressed. The opening is maximized when the white key 11a is pressed deepest.

  Further, the opening 35b provided in the partitioning surface 50 of the white key 11a, which faces the front end surface of the black key 11b, is in an initial state where the adjacent black key 11b is not pressed as shown in FIGS. Thus, it is configured to be closed by being hidden by the front end face of the adjacent black key 11b. Further, as shown in FIGS. 16 and 17, the opening 35b provided in the partitioning surface 50 of the white key 11a gradually increases in opening amount when the adjacent black key 11b is depressed. When the black key 11b to be pressed is deepest, the opening amount is maximized.

  In this case, the openings 35c and 35b provided on both the front end surface of the black key 11b and the partitioning surface 50 of the white key 11a facing the black key 11b are switched by the key 11 being depressed as in the first embodiment. When the first contact portion 13a of 13 is turned on, the aperture ratio becomes about 50%, and when the second contact portion 13b that is turned on after a first contact portion 13a is turned on, the aperture ratio is almost equal. It is configured to be 100%.

  For this reason, the openings 35c and 35b provided on both the front end surface of the black key 11b and the partition surface 50 of the white key 11a facing the black key 11b are the same as in the first embodiment when the key 11 is depressed to perform the first operation. When the contact portion 13a is turned on for the first time, the aperture ratio is about 50%. After that, when the second contact portion 13b is turned on with a time lag and the sound of the musical sound from the speaker 32 is started, The aperture ratio is configured to be almost 100%.

The openings 35c and 35b provided on both the front end surface of the black key 11b and the partition surface 50 of the white key 11a facing the black key 11b are used when the key 11 is pressed and returned to the initial position. Even when the second contact portion 13b is turned off, the aperture ratio is maintained at almost 100%. Thereafter, the first contact portion 13a is turned off with a time lag, and the sound generation from the speaker 32 is stopped. In this case, the aperture ratio is configured to be about 50%.

  Also in this case, the opening portions 35c and 35b provided on both the front end surface of the black key 11b and the partition surface 50 of the white key 11a facing the black key 11b are also the vertical length and the width in the front-rear direction. Is formed in a state adjusted according to the performance of the speaker 32 and the internal sound in the musical instrument main body 1.

  Also in such an electronic keyboard instrument, as in the first embodiment, a plurality of keys 11 in the keyboard unit 8 are depressed to cause the speaker 32 to emit a musical sound into the instrument body 1, and most of the musical sounds are recorded in the keyboard unit. The amount of opening of the openings 35, 35b, 35c of the key 11 according to the key depression operation when passing through the openings 35, 35b, 35c of the plurality of keys 11 in the keyboard section 8 through the keyboard chassis 10 of FIG. Therefore, the musical tone can be changed slightly according to the change in the opening state of the openings 35, 35b, 35c provided in each key 11. For this reason, it is possible to finely change the sound generated by the speaker 32 in response to the key pressing operation of the plurality of keys 11 and to emit sound favorably toward the performer from between the plurality of keys 11.

  In addition, in Embodiment 4 mentioned above, although the case where the switch part 13 was the structure provided with 1st, 2nd each contact part 13a, 13b was described, not only this but a switch part is Embodiment 2's. Similarly to the switch unit 40, the first to third contact units 40a to 40c may be provided. Further, the present invention is not limited to this, and a configuration in which an opening 35 is also provided on the front end surface of the white key 11a as in the third embodiment may be used.

  In the above-described first to fourth embodiments and modifications thereof, the openings 35, 35 a, 35 b, and 35 c respectively provided in the plurality of keys 11 are provided with the same opening conditions for all the sound ranges of the keyboard unit 8. However, the present invention is not limited to this, and the opening conditions of the openings 35, 35 a, 35 b, and 35 c may be changed between the low sound region side and the high sound region side in the keyboard unit 8.

  For example, the change in the aperture ratio at the opening 35, 35a, 35b, 35c of each key 11 on the bass region side is large, and the change in the aperture ratio at the opening 35, 35a, 35b, 35c of each key 11 on the treble region side is performed. It may be small. With this configuration, since the timbre change on the low tone region side can be increased, the performance expression on the low tone region side can be improved and the timbre change on the high tone region side can be reduced when performing at a low tempo. Therefore, when performing at an up-tempo, it is possible to improve the performance expression on the treble region side.

  Further, in the above-described first to fourth embodiments and the modifications thereof, the case where the present invention is applied to an electronic keyboard instrument provided with the hammer member 12 has been described, but the electronic keyboard instrument provided with the hammer member 12 is not necessarily required. In this case, of the switch units, the switch unit 40 having the first to third contact units 40a to 40c is not divided into the first switch 41 and the second switch 42, but one dome-shaped expansion. What is necessary is just to set it as the structure which provided the three contact parts in the output part.

DESCRIPTION OF SYMBOLS 1 Musical instrument body 8 Keyboard part 10 Keyboard chassis 11 Key 11a White key 11b Black key 13, 40 Switch part 13a, 40a 1st contact part 13b, 40b 2nd contact part 32 Speaker 35, 35a, 35b, 35c Opening part 40c 3rd Contact part 50 White key partition

Claims (7)

A musical instrument main body, a keyboard portion provided in the musical instrument main body and arranged in a state in which a plurality of keys are rotatably mounted on the keyboard chassis, and a key pressing operation of the plurality of keys in the keyboard portion A switch unit that performs a switch operation according to each of the above, and a speaker that emits a musical sound into the instrument body according to the switch operation of the switch unit,
An electronic keyboard instrument, wherein the plurality of keys in the keyboard section are each provided with an opening for sound emission whose opening state changes according to a key pressing operation.   2. The electronic keyboard instrument according to claim 1, wherein the openings are provided on side surfaces of the plurality of keys facing each other adjacent to each other.   The plurality of keys include a plurality of white keys and a plurality of black keys, and the openings are respectively provided on front end surfaces of the plurality of white keys. The electronic keyboard instrument according to claim 2.   The plurality of keys include a plurality of white keys and a plurality of black keys, and the opening includes a partition surface of the white keys that a front end surface of the black key faces and a front end surface of the black key. The electronic keyboard instrument according to any one of claims 1 to 3, wherein the electronic keyboard instrument is provided on both.   The switch portion includes a first contact portion that is turned on first when the key is pressed, and a second contact portion that is turned on with a time lag after the first contact portion is turned on. The speaker is configured to start sound generation when the second contact portion of the switch portion is turned on and stop sound generation when the first contact portion is turned off. The opening portion has an opening ratio of about 50% when the first contact portion is turned on / off, and an opening ratio of about 100% when the second contact portion is turned on / off. The electronic keyboard instrument according to any one of claims 1 to 4.   The switch portion includes a first contact portion that is turned on first when the key is pressed, and a second contact portion that is turned on with a time lag after the first contact portion is turned on. The speaker is configured to start sound generation when the second contact portion of the switch portion is turned on and stop sound generation when the first contact portion is turned off. The opening portion has an opening ratio of about 80% when the first contact portion is turned on / off, and an opening ratio of about 100% when the second contact portion is turned on / off. The electronic keyboard instrument according to any one of claims 1 to 4. The switch portion includes a first contact portion that is turned on first when the key is pressed, a second contact portion that is turned on after a time difference from the first contact portion, and the second contact portion. A third contact portion that is turned on with a slight time difference after the contact portion is turned on, and the speaker is different in time from the second contact portion when the third contact portion of the switch portion is turned on. The sound generation is started with a sound quality corresponding to the sound quality, and the sound generation is stopped when the first contact portion is turned off. The opening has the first contact portion on / off. The opening ratio is about 30% when turning off, the opening ratio is about 60% when turning on / off the second contact part, and the opening ratio is almost when turning on / off the third contact part. The electronic keyboard instrument according to claim 1, wherein the electronic keyboard instrument is 100%.

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