JP6150052B2 - Keyboard instrument - Google Patents

Description

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

  For example, in an electronic keyboard instrument such as an electronic piano, as described in Patent Document 1, a keyboard portion is provided in a musical instrument case whose front side is opened upward, and a keyboard lid that covers this keyboard portion is opened and closed. There is known a configuration in which a speaker is attached to the instrument case and a sound generated by the speaker is emitted from the instrument case toward the front side of the instrument case.

JP 2011-28034 A

  The keyboard portion of the electronic keyboard instrument includes a keyboard chassis disposed in the instrument case, and a plurality of keys arranged in parallel on the keyboard chassis so as to be vertically rotatable. The sound of the speaker is emitted toward the front side of the musical instrument case through each gap.

  Further, the keyboard lid is configured such that the front lid and the rear lid are connected to each other so as to be bent by a hinge and guided by the lid guide portion. In this case, the lid guide portion is arranged so that the front lid and the rear lid are bent by a hinge when the keyboard lid opens the keyboard portion upward, and the rear lid is brought close to the rear portion of the keyboard portion. It is configured.

  Thus, in this electronic keyboard instrument, when the keyboard cover opens the keyboard part upward, the front cover approaches the upper part of the instrument case with a slight gap, and the rear cover has a slight gap at the rear part of the instrument case. The sound of the speaker is emitted toward the front side of the instrument case through these gaps.

  However, in such an electronic keyboard instrument, when the sound generated by the speaker is emitted toward the front side of the instrument case through the inside of the instrument case, each gap between the plurality of keys in the keyboard part, and the back lid and the instrument The speaker sound is emitted toward the front side of the musical instrument case through the gap between the rear part of the case and the front lid and the upper part of the musical instrument case. There is a problem that sound cannot be emitted.

  The problem to be solved by the present invention is to provide a keyboard instrument that can emit sound from a speaker efficiently and satisfactorily.

  The present invention relates to a musical instrument case in which a keyboard part is disposed, a speaker disposed in the musical instrument case and behind the keyboard part, and attached to the upper part of the musical instrument case so as to be openable and closable. A sound emission lid that opens a sound emission hole for emitting the generated sound, and an auxiliary sound emission lid that is movably provided at a position protruding from the sound emission cover toward the front side of the instrument case. It is a keyboard instrument characterized by having.

  According to the present invention, when the sound emitting lid is opened and the sound emitting hole is opened, the sound generated by the speaker can be emitted well from the sound emitting hole, and in this state, the auxiliary sound emitting lid is Since it can project toward the front side of the musical instrument case, the sound emitted from the sound emission hole can be emitted toward the front side of the musical instrument case with directivity. Thereby, the sound of a speaker can be emitted efficiently and satisfactorily.

FIG. 5 is a cross-sectional view showing a state in which the present invention is applied to an electronic keyboard instrument, in which the keyboard lid is closed to cover the keyboard portion, and the sound emission lid is closed to close the sound emission hole. FIG. 2 is a cross-sectional view showing a state in which the keyboard lid is opened to expose the keyboard portion, and the sound emission lid is opened and the auxiliary sound emission lid is pulled out toward the front side in the electronic keyboard instrument shown in FIG. 1. FIG. 3 is an enlarged perspective view of a main part showing a sound emission cover and an auxiliary sound emission cover of the electronic keyboard instrument shown in FIG. 2. 1 shows a sound emission cover and an auxiliary sound emission cover of the electronic keyboard instrument shown in FIG. 1, (a) is an enlarged cross-sectional view showing the main part thereof, and (b) is a view taken along the line AA of (a). It is an expanded sectional view of a part. It is an expansion perspective view of the principal part which showed the hook part of the stopper part in the auxiliary | assistant sound emission lid | cover shown by FIG. The cross section in the BB arrow view of the sound emission cover and auxiliary | assistant sound emission cover shown by FIG. 3 is shown, (a) is the state by which the hook part of the stopper part was latched by the latching recessed part of the guide groove of a guide member FIG. 4B is an enlarged cross-sectional view of the main part showing a state in which the hook part of the stopper part is detached from the locking recess of the guide groove of the guide member and the auxiliary sound emitting lid is slid. FIG.

Hereinafter, an embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS.
This electronic keyboard instrument includes a musical instrument case 1 as shown in FIGS. The musical instrument case 1 is formed in a horizontally long, substantially box shape with the front upper part (left upper part in FIG. 1) open.

  That is, as shown in FIGS. 1 and 2, the musical instrument case 1 includes a bottom plate 2, a front plate 3 erected on the front end portion (left end portion in FIG. 1) of the bottom plate 2, and the bottom plate 2. A rear plate 4 provided upright at the rear end portion (right end portion in FIG. 1) and a pair of side plates provided upright on both left and right side portions of the bottom plate 2 (in FIG. 1, both side portions on the front and back surfaces of the paper) 5 and a top plate 6 disposed above the pair of side plates and the rear plate 4.

  In this case, as shown in FIGS. 1 and 2, the front plate 3 is formed with a height that is approximately half the height of the rear plate 4. Further, the pair of side plates 5 has a front end portion formed slightly higher than the front plate 3, and a substantially intermediate portion in the front-rear direction (left-right direction in FIG. 1) and a rear portion side formed at the same height as the rear plate 4. It is formed in the inclined part 5a which inclines rearward toward the intermediate part from the part.

  As shown in FIGS. 1 and 2, the top plate 6 includes a front top plate 7 and a rear top plate 8. In this case, the front top plate 7 is disposed on the front upper portion of the rear portion of the pair of side plates 5. The rear top plate 8 is disposed at a position one step lower than the front top plate 7 on the rear upper portion in the rear portion of the pair of side plates 5 and the upper portion of the rear plate 4. Thereby, the musical instrument case 1 is formed in a horizontally long, substantially box shape in which the front side corresponding to each inclined portion 5a of the pair of side plates 5 is opened upward.

  In the musical instrument case 1, a keyboard portion 10 is provided as shown in FIGS. The keyboard unit 10 includes a keyboard chassis 11 disposed on the bottom plate 2 of the musical instrument case 1 and a plurality of keys 12 arranged in parallel on the keyboard chassis 11 so as to be rotatable in the vertical direction. . The keyboard unit 10 is configured such that a key is pressed in a state where a plurality of keys 12 are exposed upward from the front side of the musical instrument case 1.

  Further, as shown in FIGS. 1 and 2, the console portion 9 is provided in the instrument case 1 so as to be inclined from the upper side located at the rear portion of the keyboard portion 10 to the lower side of the front portion of the top plate 6. It has been. In the musical instrument case 1, a keyboard lid 13 that covers the upper side of the keyboard portion 10 is provided by a lid guide portion 14 so as to be opened and closed. The keyboard lid 13 includes a front lid 15 and a rear lid 16, and the front lid 15 and the rear lid 16 are connected to each other by a hinge 17 so as to be bent.

  In this case, a guide shaft 15 a is provided at the front end portion of the front lid 15 so as to protrude toward the inner surfaces of the pair of side plates 5 as shown in FIGS. 1 and 2. Further, a guide shaft 16 a is provided at the front end portion of the rear lid 16 so as to protrude toward the inner surfaces of the pair of side plates 5. A shaft attachment plate 16b is attached to the rear end portion of the rear lid 16, and a connecting shaft 16c is attached to the shaft attachment plate 16b.

  As shown in FIGS. 1 and 2, the lid guide portion 14 is arranged in a substantially flat plate shape in which the front lid 15 and the rear lid 16 are inclined forward and downward when the keyboard lid 13 covers the upper side of the keyboard portion 10. In addition, when the keyboard lid 13 opens the keyboard portion 10 upward, the front lid 15 and the rear lid 16 are bent by a hinge 17 so as to be placed close to the rear portion of the keyboard portion 10. Yes. In this case, the lid guide part 14 includes a guide rail part 18 and a guide member 19.

  As shown in FIGS. 1 and 2, the guide rail portion 18 is provided on the inner surface of the pair of side plates 5 so as to be inclined obliquely upward from the upper side of the front plate 3 to the rear plate 4 through the upper side of the console portion 9. The guide shaft 15a of the front cover 15 of the keyboard cover 13 and the guide shaft 16a of the rear cover 16 are respectively guided. Thereby, as shown in FIG. 1, when the front lid 15 and the rear lid 16 cover the upper side of the keyboard portion 10, the guide rail portion 18 tilts the front lid 15 and the rear lid 16 forward and downward. It is comprised so that it may arrange | position in flat form in the state.

  As shown in FIGS. 1 and 2, the guide member 19 has a support shaft 20 provided on the inner surface of the side plate 5 at a location near the upper portion of the rear end portion of the keyboard portion 10, and is rotatable on the support shaft 20. And an arm portion 21 attached to the head. The guide member 19 is configured such that the tip of the arm portion 21 is rotatably attached to a connecting shaft 16c of a shaft mounting plate 16b provided at the rear end of the rear lid 16.

  Thereby, as shown in FIG. 1, when the front lid 15 and the rear lid 16 of the keyboard lid 13 cover the upper side of the keyboard portion 10 and the lid 15 is closed, the guide shaft 15 a of the front lid 15 Located at the front end portion of the guide rail portion 18, the guide shaft 16 a of the rear cover 16 is positioned at the intermediate portion of the guide rail portion 18, and in this state, the arm portion 21 of the guide member 19 rotates counterclockwise around the support shaft 20. And the connecting shaft 16c located at the rear end of the rear lid 16 is pushed up to a position corresponding to the guide rail portion 18 so that the front lid 15 and the rear lid 16 are inclined forward and downward. It is comprised so that it may arrange | position in flat form in the state.

  Further, as shown in FIG. 2, the lid guide portion 14 has the guide shaft 15 a of the front lid 15 positioned above the rear portion of the keyboard portion 10 when the keyboard lid 13 is opened and the keyboard portion 10 is opened upward. Located at the guide rail portion 18, the guide shaft 16 a of the rear cover 16 is located at the rear end portion of the guide rail portion 18, and the arm portion 21 of the guide member 19 rotates clockwise around the support shaft 20. The connecting shaft 16c located at the rear end portion of the rear lid 16 is hung down and positioned at the lower rear of the keyboard portion 10, whereby the front lid 15 and the rear lid 16 are bent by a hinge 17, and the rear lid 16 is moved to the keyboard. It is comprised so that it may hang down in the state made to approach the rear part of the part 10. FIG.

  By the way, in the musical instrument case 1, as shown in FIGS. 1 and 2, the speaker 23 is disposed downward with the speaker 23 positioned behind the keyboard unit 10. The speaker 23 has a key 12 at a position located behind the rear lid 16 when the rear lid 16 of the keyboard lid 13 is bent with respect to the front lid 15 and is hung in a state of approaching the rear portion of the keyboard portion 10. It is arranged on both sides of the arrangement direction.

  As shown in FIGS. 1 and 2, the bottom plate 2 of the musical instrument case 1 has a first sound emission hole 24 that emits the sound of the speaker 23 toward the lower side of the musical instrument case 1, corresponding to the speaker 23. Is provided. The rear top plate 8 of the top plate 6 of the musical instrument case 1 is provided with a second sound emission hole 25 that emits the sound of the speaker 23 toward the upper side of the musical instrument case 1.

  In this case, as shown in FIGS. 1 and 2, the front top plate 7 is located above the rear portion of the keyboard portion 10 and is positioned higher than the rear top plate 8, and the keyboard lid 13 faces the keyboard portion 10 upward. When opened, the upper surface of the front lid 15 is configured to approach. Further, the rear top plate 8 is located above the speaker 23, and the upper surface thereof is substantially the same height as the lower surface of the front top plate 7, and is provided across the upper portions of the pair of side plates 5 and the rear plate 4.

  Thereby, as shown in FIGS. 1 and 2, the second sound emitting hole 25 is provided in the rear top plate 8 positioned above the speaker 23 over almost the entire region. A sound emitting lid 26 for closing the second sound emitting hole 25 is provided on the upper surface of the rear ceiling plate 8 so as to be openable and closable. The sound emitting lid 26 is formed in a rectangular flat plate shape having the same size as the rear top plate 8 and the same thickness as the front top plate 7. The sound emitting lid 26 has a rear end portion (a right end portion in FIG. 2) attached to a rear end portion of the rear top plate 8 by a hinge 27 so as to be rotatable in the vertical direction.

  As shown in FIGS. 1 to 3, an auxiliary sound emitting lid 28 is slidably attached to the sound emitting lid 26. The auxiliary sound emitting lid 28 protrudes from the sound emitting lid 26 toward the front side (left side in FIG. 2) of the musical instrument case 1 and is housed in a lid housing portion 29 provided on the sound emitting lid 26. And is configured to move. In this case, the lid storage portion 29 is a recess provided in almost the entire area of the sound emitting lid 26, and is open to the front side and the lower side of the sound emitting lid 26.

  As shown in FIGS. 1 to 3, the auxiliary sound emitting lid 28 is formed in a flat plate shape having substantially the same size as the lid housing portion 29 of the sound emitting lid 26, and the sound emitting lid guide portion 30 allows the sound emitting lid 26 to be It is configured to be slidably guided in the front-rear direction, that is, the front-rear direction of the instrument case 1. The sound emission lid guide portion 30 includes guide protrusions 31 provided on both sides of the auxiliary sound emission lid 28 and guide members 32 provided on both sides in the lid storage portion 29 of the sound emission lid 26. I have.

  In this case, as shown in FIGS. 1 to 4, the guide protrusions 31 are continuously formed on both sides of the auxiliary sound emitting lid 28 from the front to the rear. The guide member 32 is continuously arranged from the front part to the rear part on both side parts in the lid housing part 29 of the sound emitting lid 26. In addition, a guide groove 32 a into which the guide protrusion 31 is slidably inserted extends continuously from the front portion to the rear portion of the guide member 26 on the inner surface of the guide member 26 exposed in the lid housing portion 29 of the sound emitting lid 26. Is formed.

  As a result, as shown in FIGS. 3 and 4, the sound emission lid guide portion 30 is provided in the guide groove 32 a of the guide member 32 in which the guide projection portion 31 of the auxiliary sound emission lid 28 is provided in the lid storage portion 29. In the inserted state, the guide projection 31 of the auxiliary sound emitting lid 28 moves in the guide groove 32a of the guide member 32 according to the sliding operation of the auxiliary sound emitting lid 28, thereby guiding the auxiliary sound emitting lid 28. It is configured.

  Further, as shown in FIGS. 5 and 6, the auxiliary sound emitting lid 28 slides toward the front of the musical instrument case 1 from the sound emitting lid 26 and protrudes the most, so that the stopper portion 33 causes the auxiliary sound emitting lid 28 to be It is configured not to come out of the lid storage portion 29. The stopper portion 33 includes a hook portion 34 provided at the rear end portion of the guide projection portion 31 of the auxiliary sound emitting lid 28, and a locking recess 35 provided at the front end portion of the guide groove 32 a of the guide member 32. ing.

  As shown in FIGS. 5 and 6, the hook portion 34 of the guide protrusion 31 protrudes rearward from the rear end portion (right side in FIG. 5) of the guide protrusion portion 31, and the protruding protrusion is a locking protrusion. A portion 34a is formed to protrude into the guide groove 32a. The engaging projection 34a is formed on an inclined surface in which a portion located on the rear side of the auxiliary sound emitting lid 28 protrudes toward the front side, and a portion located on the front side of the auxiliary sound emitting lid 28 is auxiliary sound emitting. It is formed on the engagement surface orthogonal to the sliding direction of the lid 28.

  As shown in FIGS. 5 and 6, the entire hook portion 34 is configured to be elastically deformed in the contact / separation direction with respect to the inner surface of the guide groove 32 a of the guide member 32. As a result, the hook portion 34 is configured to slide in a state in which the locking projection portion 34a is urged in a direction to be pressed into the guide groove 32a of the guide member 32 and is elastically contacted with the inner surface of the guide groove 32a. ing.

  Further, as shown in FIGS. 6A and 6B, the locking recess 35 provided in the guide groove 32a of the guide member 32 is directed toward the front portion of the guide groove 32a of the guide member 32. There is an inclined portion 35a inclined downward, and an abutting portion 35b that is positioned at the front end of the inclined portion 35a and orthogonal to the guide groove 32a, and the locking projection 34a of the hook portion 34 extends along the inclined portion 35a. The tip is slid, and the engagement surface of the locking projection 34a of the hook 34 is in contact with the contact 35b.

  Thereby, as shown in FIGS. 5 and 6, the stopper portion 33 slides in a direction in which the auxiliary sound emitting lid 28 is pulled out from the inside of the lid housing portion 29 of the sound emitting lid 26, and the locking projection portion of the hook portion 34. When 34a reaches the locking recess 35 of the guide groove 32a, the locking projection 34a of the hook portion 34 moves while being elastically deformed along the inclined portion 35a of the locking recess 35, and the contact portion of the locking recess 35 The auxiliary sound-emitting lid 28 is configured so as not to come out from the inside of the lid housing portion 29 of the sound-emitting lid 26 by abutting on 35b.

  Further, as shown in FIGS. 5 and 6, when the auxiliary sound emitting lid 28 is pushed into the lid housing portion 29 of the sound emitting lid 26, the stopper portion 33 is engaged with the locking projection 34 a of the hook portion 34. Moves in a direction away from the contact portion 35b of the locking recess 35 of the guide groove 32a, and the locking projection 34a of the hook portion 34 moves while being elastically deformed along the inclined portion 35a of the locking recess 35 to guide. The auxiliary sound emitting lid 28 is separated from the locking recess 35 of the groove 32a and is accommodated in the lid accommodating portion 29 of the sound emitting lid 26 while moving.

  In this case, as shown in FIG. 6B, the stopper 33 has the auxiliary sound emitting lid 28 detached from the guide groove 32 a, and the locking projection 34 a of the hook portion 34 is formed in the guide groove 32 a of the guide member 32. The auxiliary sound emitting cover 28 is configured to be held at an arbitrary position in the front-rear direction of the sound emitting lid 26 by moving while being elastically pressed against the inner surface.

Next, the operation of this electronic keyboard instrument will be described.
When playing with this electronic keyboard instrument, first, as shown in FIG. 2, the keyboard cover 13 is opened and the keyboard unit 10 is opened upward. At this time, the front end portion of the front lid 15 is lifted and moved rearward.

  Then, the guide shaft 15a of the front lid 15 and the guide shaft 16a of the rear lid 16 move along the guide rail portion 18, and the arm portion 21 of the guide member 19 rotates clockwise around the support shaft 20, and this arm As the portion 21 rotates, the connecting shaft 22 positioned at the rear end portion of the rear lid 16 rotates downward. As a result, the front lid 15 and the rear lid 16 move toward the rear side in the musical instrument case 1 while being bent gradually by the hinge 17.

  As shown in FIG. 2, the guide shaft 15 a of the front lid 15 is located at the position of the guide rail portion 18 located above the rear portion of the keyboard portion 10, and the guide shaft 16 a of the rear lid 16 is positioned behind the guide rail portion 18. The arm portion 21 of the guide member 19 that is located at the end portion is rotated clockwise around the support shaft 20 and is suspended, and the connecting shaft 16c that is located at the rear end portion of the rear cover 16 is located at the lower rear of the keyboard portion 10. When positioned, the rear lid 16 is bent with respect to the front lid 15 and is suspended in the instrument case 1 in a state of approaching the rear portion of the keyboard portion 10.

  At this time, as shown in FIG. 2, the rear cover 16 is disposed so as to hang down between the rear portion of the keyboard portion 10 and the speaker 23, so that both spaces of the keyboard portion 10 and the speaker 23 are partitioned. The rear lid 16 forms an acoustic space for the speaker 23 in the musical instrument case 1. In this state, the keyboard portion 10 is opened upward and the plurality of keys 12 are exposed upward, so that a performance is possible.

  Before playing in this state, first, the sound emission cover 26 on the top plate 6 is opened to open the second sound emission hole 25. At this time, the front end portion of the sound emitting lid 26 is pulled up, and as shown in FIG. 2, the sound emitting lid 26 is tilted forward and opened at a predetermined angle, for example, an angle of about 30 degrees around the hinge 27, The second sound emitting hole 25 of the rear top plate 8 is opened.

  When the performer performs a performance by pressing a key on the keyboard unit 10, a musical tone is generated from the speaker 23. At this time, the sound from the speaker 23 is emitted from the first sound emission hole 24 to the lower side of the musical instrument case 1, and is emitted from the second sound emission hole 25 to the upper side of the musical instrument case 1 and is emitted upward from this. The emitted sound is reflected toward the front side of the musical instrument case 1 by the sound output lid 26.

  Further, in this state, as shown in FIG. 2, the auxiliary sound emitting cover 28 of the sound emitting lid 26 is pulled out from the inside of the cover housing portion 29 of the sound emitting lid 26 toward the front side of the sound emitting cover 26. At this time, the guide protrusion 31 of the auxiliary sound emitting lid 28 moves in the guide groove 32 a of the guide member 32 provided in the lid housing portion 29 according to the sliding operation of the auxiliary sound emitting lid 28.

  When the locking projection 34a of the hook portion 34 of the stopper 33 reaches the locking recess 35 of the guide groove 32a, the locking projection 34a of the hook portion 34 is elastic along the inclined portion 35a of the locking recess 35. The engagement surface of the locking projection 34 a comes into contact with the contact portion 35 b of the locking recess 35. As a result, the locking projection 34 a does not come out of the lid storage portion 29 of the sound emitting lid 26, and the movement of the auxiliary sound emitting lid 28 with respect to the sound emitting lid 26 is stopped.

  At this time, the locking projection 34a of the hook 34 is elastically pressed against the guide groove 32a and moves along the guide groove 32a, thereby moving the locking projection 34a relative to the sound emitting lid 26. When stopped, the auxiliary sound emission lid 28 is held at an arbitrary position in the front-rear direction of the sound emission lid 26. For this reason, the pull-out length of the auxiliary sound emitting lid 28 can be freely adjusted and set.

  In this state, when the performer performs a key operation on the keyboard unit 10 to generate a musical sound from the speaker 23, and when the sound from the speaker 23 is emitted from the second sound emitting hole 25 above the instrument case 1, The sound emitted upward is reflected toward the front side of the musical instrument case 1 by the sound emitting lid 26, and also to the front side of the musical instrument case 1 by the auxiliary sound emitting lid 28 drawn out from the sound emitting lid 26. Reflected towards.

  At this time, the musical sound emitted from the second sound emission hole 25 to the upper side of the musical instrument case 1 is reflected toward the front side of the musical instrument case 1 by the sound emission cover 26 and the auxiliary sound emission cover 28, thereby The musical sound emitted from the sound emitting hole 25 is emitted toward the front side of the musical instrument case 1 with directivity without going around the sound emitting lid 26 and the auxiliary sound emitting lid 28. For this reason, acoustic performance improves.

  At this time, since the reflection area is increased by the sound emitting lid 26 and the auxiliary sound emitting lid 28, a dynamic acoustic change is created and the acoustic performance is enhanced. For this reason, a performer can hear the performance sound emitted from the speaker 23 satisfactorily, and can perform well while listening to the emitted performance sound.

  As described above, according to the electronic keyboard instrument, the instrument case 1 in which the keyboard unit 10 is disposed, the speaker 23 disposed at the rear of the keyboard unit 10 in the instrument case 1, and the upper part of the instrument case 1 A sound-release cover 26 that is attached so as to be openable and closable and that opens a second sound-release hole 25 for emitting sound generated by the speaker 23 in the open state, and is movably provided on the sound-release cover 26. Since there is provided a position that protrudes from the lid 26 toward the front side of the musical instrument case 1 and an auxiliary sound emitting lid 28 that moves to a position that is accommodated in the sound emitting lid 26, the sound of the speaker 23 can be efficiently and Sound can be emitted well.

  That is, in this electronic keyboard instrument, when the sound emission lid 26 is opened and the second sound emission hole 25 is opened, the sound generated by the speaker 23 and emitted from the second sound emission hole 25 is emitted. The lid 26 can favorably reflect and emit sound toward the front side of the musical instrument case 1, and in this state, the auxiliary sound emitting lid 28 can protrude from the sound emitting lid 26 toward the front side of the musical instrument case. Therefore, the sound emitted from the second sound emission hole 25 can also be reflected with good directivity toward the front of the musical instrument case 1 and emitted by the auxiliary sound emission cover 28.

  As a result, the sound emitted from the second sound emission hole 25 to the upper side of the musical instrument case 1 is reflected toward the front side of the musical instrument case 1 by the sound emission cover 26 and the auxiliary sound emission cover 28, so The sound emitted from the sound hole 25 does not circulate behind the sound emission lid 26 and the auxiliary sound emission lid 28, and the sound emitted from the second sound emission hole 25 is reflected toward the front side of the instrument case 1. Can be emitted with directivity.

  In addition, since the reflection area is increased by the sound emitting lid 26 and the auxiliary sound emitting lid 28, a dynamic acoustic change can be created and the acoustic performance can be improved. It is possible to listen to the played performance sound satisfactorily and to perform well while listening to the emitted performance sound.

  In this case, since the auxiliary sound emitting lid 28 is accommodated in the sound emitting lid 26, the auxiliary sound emitting lid 28 does not get in the way when the sound emitting lid 26 is closed and the second sound emitting hole 25 is closed. The second sound emission hole 25 can be reliably and satisfactorily closed with the sound emission lid 26. That is, the sound emitting lid 26 is provided with a lid housing portion 29 for housing the auxiliary sound emitting lid 28, so that the auxiliary sound emitting lid 28 can be reliably and satisfactorily stored in the lid housing portion 29. Thus, the appearance and design of the entire keyboard instrument can be kept intact.

  The second sound emitting hole 25 is provided through the top plate 6 located at the top of the musical instrument case 1 so as to penetrate the top and bottom of the musical instrument case 1. By being rotatably attached, the second sound emitting hole 25 can be opened and closed simply and easily by simply rotating the sound emitting lid 26 in the vertical direction, and the sound emitting lid 26 can be opened at a predetermined angle. Since the sound can be opened while being inclined upward, the sound generated by the speaker 23 by the sound output lid 26 can be reflected well from the second sound output hole 25 toward the front side of the musical instrument case 1 to be emitted. it can.

  Further, the keyboard lid 13 has a configuration in which the front lid 15 and the rear lid 16 are connected to each other by a hinge 17 so as to be bent. Therefore, when the keyboard portion 10 is opened upward, the front lid 15 and the rear lid 16 are hinged. The folded back lid 16 can be disposed in a state in which the folded back lid 16 is brought close to the rear portion of the keyboard portion 10. Thereby, since the rear cover 16 is suspended and arranged between the rear part of the keyboard part 10 and the speaker 23, both of the spaces can be partitioned, so that the acoustic space of the speaker 23 can be provided in the instrument case 1. Can be formed.

  Further, in this electronic keyboard instrument, the auxiliary sound emitting lid 28 is attached to the sound emitting lid 26 so as to be slidable in the front-rear direction of the musical instrument case 1. The auxiliary sound emission cover 28 can be easily and satisfactorily protruded from the sound emission cover 26 toward the front side of the musical instrument case. In this case, the auxiliary sound emitting lid 28 is guided in the front-rear direction of the sound emitting lid 26 by the sound emitting lid guide portion 30 when sliding with respect to the sound emitting lid 26, so that the auxiliary sound emitting lid 28 is The sound output lid 26 can be smoothly slid.

  That is, the sound emitting lid guide portion 30 includes guide protrusions 31 provided on both sides of the auxiliary sound emitting lid 28, guide members 32 provided on both sides in the lid housing portion 29 of the sound emitting lid 26, Since the guide member 32 is provided with a guide groove 32a into which the guide protrusion 31 is slidably inserted, the guide protrusion 31 of the auxiliary sound emitting lid 28 is assisted by the guide groove 32a of the guide member 32. The sound can be smoothly moved without rattling according to the sliding operation of the sound emission lid 28.

  Further, this electronic keyboard instrument is provided with a stopper portion 33 for stopping the movement of the auxiliary sound emission cover 28 when the auxiliary sound emission cover 28 slides from the sound emission cover 26 toward the front side of the musical instrument case 1. When the auxiliary sound emitting lid 28 is slid from the sound emitting lid 26 toward the front side of the musical instrument case 1 and pulled out most, the auxiliary sound emitting lid 28 is moved from the inside of the cover housing portion 29 of the sound emitting lid 26 by the stopper portion 33. It can be surely prevented from coming out.

  That is, the stopper portion 33 includes a hook portion 34 provided at the rear end portion of the guide projection portion 31 of the auxiliary sound emitting lid 28, and a locking recess portion 35 provided at the front end portion of the guide groove 32 a in the sound emitting lid 26. When the auxiliary sound emitting lid 28 slides in the direction of being pulled out from the inside of the cover accommodating portion 29 of the sound emitting lid 26 and the hook portion 34 reaches the locking recess 35 of the guide groove 32a, the hook portion 34 is provided. Can be locked by the locking recess 35. Thereby, the movement of the auxiliary sound emitting lid 28 can be surely stopped, and the auxiliary sound emitting lid 28 can be prevented from coming out of the inside of the cover housing portion 29 of the sound emitting lid 26.

  In this case, the hook portion 34 protrudes rearward from the rear end portion of the guide protrusion portion 31, and the locking protrusion portion 34 a is formed to protrude toward the guide groove 32 a of the guide member 32 at the protruded end portion. Since the locking projection 34 a is configured to be elastically pressed against the guide groove 32 a of the guide member 32, when the locking projection 34 a of the hook portion 34 moves along the guide groove 32 a of the guide member 32, The auxiliary sound emitting lid 28 can be held at an arbitrary position in the front-rear direction of the sound emitting lid 26 by the elastic force of the hook portion 34, and thereby the drawer length of the auxiliary sound emitting lid 28 can be freely adjusted and set. be able to.

  In the above-described embodiment, the case where the speaker 23 is provided downward in the musical instrument case 1 has been described. However, the configuration is not limited thereto, and the speaker 23 may be provided upward or forward.

As mentioned above, although one Embodiment of this invention was described, this invention is not restricted to this, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
According to the first aspect of the present invention, the instrument case in which the keyboard portion is disposed, the speaker disposed in the instrument case and behind the keyboard portion, and the upper portion of the instrument case are detachably attached and opened. A sound-release lid that opens a sound-release hole for emitting sound generated by the speaker in the state, and an auxiliary release that is movably provided at a position protruding from the sound-release cover toward the front side of the instrument case. A keyboard instrument comprising a sound cover.

  According to a second aspect of the present invention, in the keyboard musical instrument according to the first aspect, the sound emission hole is provided through a top plate located at an upper part of the musical instrument case so as to penetrate vertically. The lid is a keyboard instrument characterized in that the lid is mounted on the top plate so as to be rotatable in the vertical direction.

  According to a third aspect of the present invention, in the keyboard instrument according to the first or second aspect, the auxiliary sound emitting lid is attached to the sound emitting lid so as to be slidable in the front-rear direction of the musical instrument case. It is a keyboard instrument characterized by

  According to a fourth aspect of the present invention, there is provided the keyboard instrument according to the third aspect, further comprising a sound emission cover guide portion that guides the auxiliary sound emission cover in the front-rear direction of the instrument case with respect to the sound emission cover. It is a keyboard instrument characterized by this.

  According to a fifth aspect of the present invention, in the keyboard musical instrument according to the third or fourth aspect, when the auxiliary sound emission cover is moved from the sound emission cover toward the front side of the musical instrument case, the auxiliary sound emission cover is provided. A keyboard instrument comprising a stopper portion for stopping the movement of a sound cover.

DESCRIPTION OF SYMBOLS 1 Musical instrument case 6 Top plate 7 Front top plate 8 Back top plate 10 Keyboard part 13 Keyboard cover 14 Cover guide part 15 Front cover 16 Rear cover 23 Speaker 25 2nd sound emission hole 26 Sound output cover 27 Hinge 28 Auxiliary sound output cover 29 Cover storage Part 30 Sound emission cover guide part 33 Stopper part

Claims (5)

A musical instrument case with a keyboard
A speaker disposed in the instrument case and behind the keyboard;
A sound-release lid that is attached to the upper part of the instrument case so as to be openable and closable, and that opens a sound emission hole for emitting sound generated by the speaker in the open state;
An auxiliary sounding lid provided movably from the sounding lid to a position protruding toward the front side of the instrument case;
A keyboard instrument characterized by comprising   2. The keyboard instrument according to claim 1, wherein the sound emission hole is provided through a top plate located at an upper part of the instrument case so as to penetrate the top and bottom, and the sound emission lid is provided on the top plate in a vertical direction. A keyboard instrument characterized by being mounted so that it can rotate in any direction.   3. The keyboard instrument according to claim 1, wherein the auxiliary sound emitting lid is attached to the sound emitting lid so as to be slidable in the front-rear direction of the instrument case. 4.   The keyboard instrument according to claim 3, further comprising a sound emission lid guide portion that guides the auxiliary sound emission lid in the front-rear direction of the instrument case with respect to the sound emission lid. 5. The keyboard instrument according to claim 3, wherein when the auxiliary sound emitting lid moves from the sound emitting lid toward the front side of the musical instrument case, the stopper portion stops movement of the auxiliary sound emitting lid. A keyboard instrument characterized by comprising

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