JP2011053434A - Keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard instrument which has good assembly workability and of which electrical wiring and electrical inspection work are easily performed, has high productivity, and allows easy inventory management. <P>SOLUTION: A speaker 32 is provided on a keyboard chassis 10 provided so as to be rotated in vertical direction, in which a plurality of keys 11 are arranged in a musical scale order. The keyboard chassis 10 and the speaker 32 are united in one unit. Thereby, assembly workability is improved, and electrical wiring of the keyboard chassis 10 and the speaker 32 are performed before incorporating the keyboard chassis 10 and the speaker 32 in a musical instrument body 1, and electrical inspection is performed for both. Therefore the instrument with high productivity is provided, and inventory management is easily performed since the instrument is stored in a state where the keyboard chassis 10 and the speaker 32 are united and the space for a storing place is easily secured. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

  Conventionally, in a keyboard instrument, as described in Patent Document 1, in order to reduce the size of the entire instrument, a keyboard portion in which a plurality of keys are arranged on a keyboard chassis is provided in the instrument case. There is known a configuration in which a speaker box is provided on the lower surface of a musical instrument main body provided with a section, and a speaker is disposed in the speaker box so as to be inclined obliquely forward and downward with respect to the vertical direction.

JP 2000-81885 A

  However, in such a conventional keyboard instrument, since the keyboard part and the speaker are separately attached to the instrument body, there is a problem that the assembly work is complicated and troublesome, and the keyboard part and the speaker are attached to the instrument body. If not assembled, the keyboard part and the speaker cannot be electrically connected, so that the wiring work is troublesome, and there is a problem that the keyboard part and the speaker cannot be electrically inspected.

  The problem to be solved by the present invention is to provide a keyboard instrument that has good assembly workability, can easily perform electrical wiring work and electrical inspection work, has high productivity, and can easily manage inventory. is there.

In order to solve the above problems, the present invention includes the following components.
The invention according to claim 1 is a keyboard musical instrument characterized in that a speaker is provided in a keyboard chassis in which a plurality of keys are arranged in the order of the scales and each is rotatably provided in the vertical direction.

  According to a second aspect of the present invention, in the keyboard instrument according to the first aspect, the speaker is attached to a lower surface of the keyboard chassis and emits generated sound into the keyboard chassis. is there.

  According to a third aspect of the present invention, the keyboard chassis is formed in a hollow shape with a gap penetrating the inside and outside of the keyboard chassis, and a speaker attachment for attaching the speaker to the rear part of the keyboard chassis. The keyboard instrument according to claim 2, wherein a portion is provided.

  According to a fourth aspect of the present invention, there is provided a musical instrument main body that accommodates the keyboard chassis, and the bottom of the musical instrument main body is provided with an opening into which the speaker is inserted and protrudes downward. It is a keyboard musical instrument in any one of Claims 1-3 characterized by the above-mentioned.

  According to the present invention, the keyboard chassis and the speaker can be integrated into a unit, thereby improving the assembling workability, and before the keyboard chassis and the speaker are incorporated into the instrument body, Electrical wiring between the keyboard chassis and the speaker can be performed, and electrical inspection of both can be performed. For this reason, the assembly workability is good and the electrical wiring work and the electrical inspection work can be easily performed, so that the productivity is high and the inventory management can be easily performed.

It is the front view which showed one Embodiment of the keyboard musical instrument to which this invention is applied. It is a top view of the keyboard musical instrument of FIG. It is an expanded sectional view of the principal part in the AA arrow of FIG. FIG. 2 is an exploded perspective view of a main part of the keyboard instrument of FIG. 1 as viewed from below with the keyboard chassis and instrument body disassembled. FIG. 4 is an enlarged bottom view showing a speaker unit in the keyboard instrument of FIG. 3. 1 shows a state in which the speaker box is removed and one speaker is removed from the speaker unit of FIG. 1, in which (a) is a partially broken bottom view of the bottom plate viewed from below, and (b) is its BB. It is sectional drawing which showed the state which attached the speaker in the arrow view.

Hereinafter, an embodiment of a keyboard musical instrument to which the present invention is applied will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the keyboard instrument includes a musical instrument body 1. The instrument body 1 includes a pair of side plates 2 on both the left and right sides, a bottom plate 3 provided on the upper side between the pair of side plates 2, a front plate 4 provided upright on the front end of the bottom plate 3, A rear plate 5 provided upright at the rear end portion of the bottom plate 3, a top plate 6 disposed at each upper end portion of the rear plate 5 and the pair of side plates 2, and a lower end portion between the pair of side plates 2. The foot pedal 7 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 3, 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 FIG. 3, the keyboard unit 8 includes a keyboard chassis 10 disposed on the bottom plate 3 of the instrument body 1. The keyboard chassis 10 is made of a synthetic resin, and the inside is formed in a substantially hollow shape.

  The keyboard chassis 10 includes a plurality of keys 11 that are pivotable 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, a plurality of light emitting units 14 that respectively irradiate light inside the plurality of keys 11, and a sound generation unit A speaker unit 30 is provided.

  In this case, as shown in FIGS. 1 to 3, the plurality of keys 11 are composed of white keys and black keys, and are formed of a light-transmitting synthetic resin, each rear end portion of which is the rear side of the keyboard chassis 10. Each of the key support portions 10a provided on the upper portion (upper right side in FIG. 3) is provided so as to be pivotable in the vertical direction by the shaft portion 11a. In this state, as shown in FIG. It has become.

  As shown in FIG. 3, the plurality of hammer members 12 are rotated in the vertical direction by the shaft portions 12a on the hammer support portions 10b provided on the keyboard chassis 10 in a state corresponding to the lower sides of the plurality of keys 11, respectively. It is attached as possible. In this case, the hammer member 12 is inserted from the rear (right side in FIG. 3) into the opening 10c provided in the keyboard chassis 10 at the tip end (left end in FIG. 3) located on the side of the shaft 12a. It is comprised so that it may contact | abut to the lower surface of this from the lower side.

  As a result, as shown in FIG. 3, when the plurality of keys 11 are pressed, the plurality of hammer members 12 have their tip portions (left end portion in FIG. 3) corresponding to the key pressing operation. Each hammer member 12 is configured to apply an action load to each key 11 by rotating each hammer member 12 counterclockwise in FIG. 3 around the shaft portion 12a against each weight. ing.

  Further, as shown in FIG. 3, the plurality of hammer members 12 are described later in which the rear end portion of the hammer member 12 is provided at the lower rear portion of the keyboard chassis 10 when the key 11 is not pressed. The lower limit position of the hammer member 12 is regulated by coming into contact with the lower limit stopper 16 such as a felt disposed on the front end of the bottom plate portion 15a of the speaker mounting portion 15 to be operated.

  As shown in FIG. 3, the switch portion 13 includes a rubber sheet 18 disposed on the switch substrate 17, and a dome-shaped bulge portion is associated with the switch pressing portion 19 of the key 11 on the rubber sheet 18. It has a formed configuration. As a result, when the bulging portion of the rubber sheet 18 is pressed by the switch pressing portion 19 of the key 11, the switch portion 13 is elastically deformed and the movable contact inside thereof is placed on the switch substrate 17. By contacting the fixed contact, a switch signal is output in response to a key pressing operation of each key 11.

  The plurality of light emitting sections 14 are each composed of a light emitting element such as a light emitting diode (LED), and as shown in FIG. 3, the front side of each white key and each black key as the plurality of keys 11 on the keyboard chassis 10. Are provided corresponding to each. The plurality of light emitting units 14 are electrically connected to the switch board 17 of the switch unit 13 provided in the keyboard chassis 10. In this case, the light emitting unit 14 corresponding to the white key is provided on the upper front side of the keyboard chassis 10 and is configured to irradiate light on the front side of the white key.

  Further, as shown in FIG. 3, the light emitting unit 14 corresponding to the black key is provided at an upper portion of the intermediate portion of the keyboard chassis 10 and is configured to irradiate the front side inside of the black key. As a result, the plurality of light emitting units 14 irradiate the front side of each key 11 with the emitted light, respectively, and the emitted light passes through each key 11 so that the front side of each key 11 is illuminated. It is configured as follows.

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

  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 by a connecting portion 21 so as to be rotatable. In this case, as shown in FIG. 3, a front guide shaft 22 is provided at the front end portion (left end portion in FIG. 3) of the front lid 20a, and a handle portion 23 for opening and closing the keyboard lid 20 is provided. It has been. 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 FIG. 3, a front guide shaft 22 provided on the front cover 20a of the keyboard cover 20 is slidable on the front upper part (upper left part in FIG. 3) of the inner surfaces of the pair of side plates 2 in the instrument body 1. A front guide portion 26 is provided for guiding the front side. 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, as shown in FIG. 3, a rear guide shaft 24 provided on the rear cover 20b of the keyboard cover 20 is provided on the rear upper side (upper right side in FIG. 3) of the inner surfaces of the pair of side plates 2 in the instrument body 1. A rear guide portion 27 that is slidably guided is provided so as to be inclined in a state of being curved in a circular arc shape at the rear lower portion (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.

  As a result, when the keyboard lid 20 moves the handle 23 to the front side (left side in FIG. 3) of the musical instrument 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 located at the front upper portion of the rear guide portion 27, and the pinion gear 25 is located at the front upper portion of the rack gear 28, so that the front lid 20a and the rear lid 20b are tilted forwardly downward. It is comprised so that an upper side may be covered.

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

  In this case, as shown in FIG. 3, the keyboard lid 20 moves the pinion gear 25 obliquely downward along the rack gear 28 and the rear guide shaft 24 obliquely downward along the rear guide portion 27. By moving, the rear lid 20b is configured to move toward an oblique rear lower portion (lower right portion in FIG. 3) while being gradually bent with respect to the front lid 20a around the connecting portion 21.

  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 positioned at the lower part, the rear cover 20b is disposed upright behind the keyboard part 8 in the musical instrument body 1, and the front guide shaft 22 of the front cover 20a is disposed at the rear end part (the right end in FIG. 3). Part).

  At this time, as shown in FIG. 3, in the keyboard lid 20, the front portion of the front lid 20a is held by the front guide shaft 22, and the rear portion of the front lid 20a is the front end portion of the rear lid 20b (the upper end portion in FIG. 3). And the front lid 20a is arranged on the lower side of the top plate 6 in a state substantially parallel to the top plate 6 so that the keyboard portion 8 is exposed upward.

  By the way, as shown in FIGS. 1 and 4, speaker units 30 are provided on both sides of the lower portion of the keyboard chassis 10 so as to protrude downward. As shown in FIG. 4, the speaker unit 30 is attached to the speaker mounting part 15 of the keyboard chassis 10 through the opening 33 provided in the bottom plate 3 of the musical instrument body 1 and is lowered from the bottom plate 3 of the musical instrument body 1. It is configured so as to protrude to the side.

  In this case, as shown in FIGS. 3 and 4, the speaker mounting portion 15 of the keyboard chassis 10 includes a bottom plate portion 15 a that extends horizontally in the front-rear direction at the lower rear end of the keyboard chassis 10, and the keyboard chassis 10. And an attachment boss portion 15b suspended from the inner surface located on the front side (left side in FIG. 3) of the key support portion 10a. Further, as shown in FIGS. 3 and 4, the opening 33 of the bottom plate 3 of the musical instrument main body 1 is a through-hole opened to the inside and the outside of the musical instrument main body 1 and provided on both sides of the bottom plate 3. Yes.

  As shown in FIGS. 3 and 4, the speaker unit 30 includes a speaker box 31 and a speaker 32 covered by the speaker box 31. 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, as shown in FIG. 5, a large number of slit-like sound emission holes 31 a elongated in the vertical direction are provided on the outer surface of the speaker box 31. As shown in FIG. 3, the speaker box 31 is attached to the speaker attachment portion 15 of the keyboard chassis 10 by screws 30 a together with the speakers 32, and is disposed so as to protrude downward from the bottom plate 3 of the musical instrument body 1.

  As shown in FIGS. 3 and 4, the speaker 32 is as shown in FIGS. 6A and 6B with the baffle surface side (the upper surface side in FIG. 3) generating sound facing upward. The speaker box 31 and the mounting boss 15b of the keyboard chassis 10 are attached to the bottom plate portion 15a and the mounting boss portion 15b by screws 30a.

  As a result, as shown in FIG. 3, the speaker 32 emits most of the generated sounds to the inside of the keyboard chassis 10 and the inside of the musical instrument case 1, and the remaining sounds are emitted from the speaker boxes 31. The sound is emitted from the hole 31 a to the lower side of the bottom plate 3 of the musical instrument main body 1. In this case, as shown in FIG. 3, the keyboard chassis 10 has an opening 10c into which the tip end portion (left end portion in FIG. 3) of the hammer member 12 is inserted, or between the key support portion 10a and the hammer support portion 10b. Various gaps such as the provided slit hole 10d are formed through inside and outside.

Next, the case where this keyboard instrument is assembled will be described.
First, the keyboard unit 8 is assembled. At this time, the switch board 17 of the switch unit 13 and the light emitting unit 14 are mounted on the keyboard chassis 10. Thereafter, a plurality of keys 11 are arranged and attached on the keyboard chassis 10 so as to be rotatable in the vertical direction, and a plurality of hammer members 12 are attached to the keyboard chassis 10 so as to correspond to the plurality of keys 11.

  Thereafter, the speaker unit 30 is attached to the keyboard chassis 10. At this time, the speaker 32 is made to correspond to the speaker mounting portion 15 provided at the lower rear portion of the keyboard chassis 10 so that the speaker 32 is covered with the speaker box 31 in this state, and the speaker box 31 is covered with the speaker of the keyboard chassis 10. It attaches to the attaching part 15 with the speaker 32 with the screw | thread 30a. Thereby, the keyboard chassis 10 and the speaker part 30 are integrated.

  In this state, since the keyboard chassis 10 and the speaker unit 30 are integrated, the switch board 17 of the switch unit 13 of the keyboard chassis 10, the light emitting unit 14, and the speaker 32 of the speaker unit 30 are wired to each other. Can be electrically connected. Thereby, the keyboard part 8 can test | inspect as a product. That is, by pressing a plurality of keys 11 arranged on the keyboard chassis 10 to generate a tone from the speaker 32, the plurality of keys 11 and the corresponding hammer member 12 are adjusted, and the speaker 32 generates a sound. Adjust the sound to be played.

  Thereafter, the keyboard portion 8 provided with the speaker portion 30 is incorporated in the musical instrument main body 1. At this time, the speaker unit 30 attached to the lower rear portion of the keyboard chassis 10 is made to correspond to the opening 33 provided in the bottom plate 3 of the musical instrument main body 1 from above, and the speaker unit 30 is opened to the opening 33 of the bottom plate 3 in this state. The keyboard chassis 10 is placed on the bottom plate 3 of the musical instrument main body 1. Thereby, the keyboard chassis 10 is arranged in the musical instrument main body 1 and the speaker unit 30 is arranged in a state of protruding downward from the bottom plate 3 of the musical instrument main body 1.

Next, the case where this keyboard instrument is used will be described.
First, as shown in FIG. 3, the keyboard lid 20 covering the upper side of the keyboard unit 8 is opened to expose the keyboard unit 8. 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. 3) of the instrument main 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 backward. Roll towards.

  When 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 rear lid 20b moves relative to the front lid 20a. It moves toward the diagonally lower rear part (lower right part in FIG. 3) while bending gradually around the connecting part 21. At this time, the front end portion (the left end portion in FIG. 3) of the front lid 20a moves rearward along the front guide portion 26 while being supported by the front guide shaft 22, and the rear end portion of the front lid 20a is the rear lid 20b. It moves backward while being supported by the front end.

  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. At this time, the rear cover 20 b is arranged so as to stand substantially parallel to the back plate 5 in a state where the back cover 20 b is close to the back plate 5 of the instrument body 1.

  Further, as shown in FIG. 3, the front lid 20 a has its front guide shaft 22 positioned at the rear end portion of the front guide portion 26, and the front portion of the front lid 20 a is held by the front guide shaft 22. With the rear part of 20a held by the front end part (upper end part in FIG. 3) of the rear cover 20b, the front cover 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 a performance is performed by pressing each key 11 of the keyboard unit 8, the speaker 32 emits a performance sound in response to the key pressing operation. At this time, most of the performance sound produced by the speaker 32 is emitted into the keyboard chassis 10 and the instrument body 1 of the keyboard section 8, and the emitted performance sound is emitted from the keyboard section 8 side to the instrument body 1. Sound is emitted toward the outside of the front.

  That is, most of the performance sound emitted upward from the speaker 32 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 diagonally forward of the keyboard unit 8. Sound is emitted upward. At this time, vibration of sound of 100 Hz or less emitted from the speaker 32 is transmitted to the keyboard chassis 10 to vibrate the keyboard chassis 10, and the vibration of the keyboard chassis 10 is applied to the fingertip of the player who is performing the key pressing operation. By transmitting, you can feel the vibration that approximates that of an acoustic piano.

  The performance sound emitted from the speaker 32 into the musical instrument main body 1 is reflected by the keyboard lid 20 that is housed in the rear side of the musical instrument main body 1 and bent at a substantially right angle, and is reflected from above the keyboard portion 8. 1 is emitted toward the front side of the musical instrument 1 and passes through the gap 6 between the keyboard lid 20 and the back plate 5 and the top plate 6 of the musical instrument main body 1 and from above the keyboard portion 8 toward the front side of the musical instrument main body 1. Sound is emitted.

  On the other hand, 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 31a 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 keyboard instrument, since the plurality of keys 11 are arranged in the order of the scales and the speaker 32 is provided in the keyboard chassis 10 that is rotatably provided in the vertical direction, the keyboard chassis 10 The speaker 32 can be integrated and unitized. As a result, the assembly workability can be improved, and before the keyboard chassis 10 and the speaker 32 are assembled into the musical instrument main body 1, the electrical wiring work between the keyboard chassis 10 and the speaker 32 can be performed. It is also possible to perform an electrical inspection.

  For this reason, the assembly workability is good, and the electrical wiring work and the electrical inspection work between the keyboard chassis 10 and the speaker 32 can be easily performed, so that a product with high productivity can be provided and the keyboard chassis 10 can be provided. Since the keyboard chassis 10 and the speaker 32 can be stored in an integrated state before the speaker 32 is incorporated in the musical instrument main body 1, it is easy to secure a storage space, thereby facilitating inventory management. it can.

  In this case, the speaker 32 is attached to the rear lower surface of the keyboard chassis 10 and emits the generated sound toward the keyboard chassis 10, so that a performance sound emitted from the speaker 32 is emitted from the keyboard chassis 10. By passing through the gaps of the key 11, the performance sound that has passed therethrough can be emitted favorably toward the upper front side of the keyboard portion 8. For this reason, since the performance sound emitted from the speaker 32 can be emitted from the keyboard portion 8 side in the musical instrument main body 1 toward the front outside of the musical instrument main body 1, the acoustic performance is good and the performer can perform the performance sound. Can be heard well without discomfort.

  Of the performance sounds emitted from the speaker 32, the performance sound emitted in the musical instrument main body 1 is reflected by the keyboard lid 20 housed in the rear side of the musical instrument main body 1 and bent at a substantially right angle. The sound is emitted from above the keyboard portion 8 toward the front side of the musical instrument main body 1, and passes through the gap 6 between the keyboard lid 20 and the back plate 5 and the top plate 6 of the musical instrument main body 1. Since sound is emitted toward the front side of the musical instrument main body 1 from above, this also provides good acoustic performance and allows the performer to hear the performance sound satisfactorily without any discomfort.

  Furthermore, the remaining performance sounds that are generated by the speaker 32 and are not emitted upward are emitted from the sound emission holes 31a of the speaker box 31 toward the lower side of the bottom plate 3 of the musical instrument main body 1, thereby allowing the performer to perform. The sound of the performance can be released so that it can be heard from the foot. 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. Since both the performance sound and the performance sound are emitted from the entire musical instrument, the sound performance is good and the performer can hear the performance sound satisfactorily without any discomfort.

  Further, in this keyboard instrument, the keyboard chassis 10 has various gaps such as the opening 10c and the slit hole 10d through which the keyboard chassis 10 penetrates in and out, so that the inside is formed in a hollow shape. The sound is guided over the entire area of the keyboard chassis 10, and the guided performance sound is emitted to the outside of the keyboard chassis 10 through various gaps such as the opening 10c and the slit hole 10d of the keyboard chassis 10, and the sound is emitted. The played sound can be emitted well from the gaps of the plurality of keys 11 toward the upper front side of the keyboard portion 8 diagonally.

  At this time, the vibration of the sound of 100 Hz or less emitted from the speaker 32 is transmitted to the keyboard chassis 10 and can vibrate the keyboard chassis 10, so that the performance of the keyboard chassis 10 is performed by pressing the key. It can be felt with the fingertips of the person, and by this, vibration similar to an acoustic piano can be experienced.

  Further, since the speaker mounting portion 15 for mounting the speaker 32 is provided at the lower rear side of the keyboard chassis 10, the speaker 32 can be easily and easily attached to the keyboard chassis 10, and this also It is possible to improve the mounting workability. In this case, the speaker mounting portion 15 includes a bottom plate portion 15 a provided at the lower rear side of the keyboard chassis 10 and a mounting boss portion 15 b provided on the keyboard chassis 10. The performance sound emitted from the speaker 32 can be emitted well into the keyboard chassis 10 even when attached upward.

  Further, this keyboard instrument includes a musical instrument main body 1 that accommodates a keyboard chassis 10, and a bottom plate 3 of the musical instrument main body 1 is provided with an opening 33 into which a speaker 32 is inserted and protrudes downward. Therefore, when the keyboard portion 8 is incorporated into the musical instrument main body 1, the keyboard chassis 10 can be easily incorporated into the musical instrument main body 1 simply by inserting the speaker 32 into the opening 33 of the bottom plate 3 of the musical instrument main body 1. As a result, the assembly workability can be improved and the loudspeaker 32 protrudes below the bottom plate 3 of the musical instrument main body 1. Therefore, the musical instrument main body 1 can be made compact, and the entire musical instrument can thereby be constructed. Can be miniaturized.

  In the above-described embodiment, the case where the speaker 32 is provided on the lower surface of the keyboard chassis 10 has been described. However, the present invention is not limited to this. For example, the speaker 32 may be provided at a rising portion at the rear end of the keyboard chassis 10. The keys 11 may be provided on both sides in the arrangement direction of the keys 11. Also in this case, the openings 33 may be provided on both side portions of the back plate 5 located behind the keyboard portion 8 or on the pair of side plates 2 located on both sides of the keyboard portion 8.

  In the above-described embodiment, the speaker unit 30 includes the speaker 32 and the speaker box 31 that covers the speaker 32, and these are attached to the speaker attachment unit 15 provided at the lower rear side of the keyboard chassis 10. As described above, the present invention is not limited to this, and only the speaker 32 is attached to the speaker attachment portion 15 of the keyboard chassis 10, and the speaker box 31 is attached to the lower surface of the bottom plate 3 of the musical instrument body 1 separately from the speaker 32. Also good.

  Furthermore, in the above-described embodiment, the case where the keyboard unit 8 is configured to include a plurality of hammer members 12 that apply action loads to the respective keys 11 in response to key pressing operations of the plurality of keys 11 has been described. The configuration need not include the hammer member 12, and can be applied to a simple keyboard instrument that does not use the hammer member 12. In this case, since the lower limit stopper portion 16 that restricts the lower limit position of the hammer member 12 is not necessary, the opening portion 33 provided in the bottom plate 3 of the instrument body 1 is not restricted by the lower limit stopper portion 16. 33 can be provided on the bottom plate 3 in any shape and size.

DESCRIPTION OF SYMBOLS 1 Musical instrument body 2 Side plate 3 Bottom plate 4 Front plate 5 Back plate 6 Top plate 8 Keyboard part 10 Keyboard chassis 10a Key support part 10b Hammer support part 10c Opening part 10d Slit hole 11 Key 15 Speaker attachment part 20 Keyboard cover 30 Speaker part 31 Speaker Box 32 Speaker 33 Opening

Claims (4)

  A keyboard instrument characterized in that a speaker is provided in a keyboard chassis in which a plurality of keys are arranged in the order of the scales and each of the keys is rotatably provided in the vertical direction.   The keyboard instrument according to claim 1, wherein the speaker is attached to a lower surface of the keyboard chassis and emits a generated sound toward the keyboard chassis.   The keyboard chassis is formed in a hollow shape with a gap penetrating the inside and outside of the keyboard chassis, and a speaker mounting portion for mounting the speakers is provided at the rear of the keyboard chassis. The keyboard instrument according to claim 2. The instrument body for housing the keyboard chassis is provided, and an opening is provided at the bottom of the instrument body so that the speaker is inserted and protrudes downward. Keyboard instrument described in any one.

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