JP6252109B2 - Keyboard instrument - Google Patents

Description

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

  For example, in an electronic keyboard instrument, 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 the keyboard portion is provided so as to be openable and closable. A speaker is mounted face down in the instrument case located behind the keyboard. Of the sounds generated by this speaker, the high-side sound is emitted to the bottom of the instrument case, and the low-side sound is emitted into the instrument case. Is configured to emit sound toward the front side of the musical instrument case.

JP 2010-286633 A

  Such an electronic keyboard musical instrument is configured to provide a sound emitting part composed of a large number of small holes on the keyboard cover, and to emit a low-frequency sound from the sound emitting part toward the front side of the instrument case. In addition, the electronic keyboard instrument includes a keyboard chassis having a keyboard section disposed in the instrument case, and a plurality of keys arranged in parallel in a vertically rotatable manner on the keyboard chassis. The low-pitched sound is emitted toward the front side of the instrument case through the gaps of the keys.

  However, in such an electronic keyboard instrument, among the sounds generated by the speaker, the high-side sound is emitted to the lower side of the instrument case, and the lower-side sound is directed from the inside of the instrument case to the front side of the instrument case. Therefore, the sound emitted from the musical instrument case always has a flat sound quality, and there is a problem that the sound quality on the low sound side cannot be improved.

  In addition, in order to improve the sound quality on the bass side, the instrument case is divided into a space on the speaker side and a space on the keyboard side by a keyboard lid, and the space between both spaces is closed with a keyboard lid to make it independent. An electronic keyboard instrument has been developed. However, in such an electronic keyboard instrument, even if the sound quality on the bass side can be improved by the independent acoustic space on the speaker side, the sound on the bass side cannot be emitted toward the front side of the instrument case, This time, there arises a problem that sound quality in a flat state cannot be obtained.

  The problem to be solved by the present invention is to provide a keyboard instrument that can change the sound quality only by changing the opening position of the keyboard lid.

  The present invention provides a musical instrument case whose front side is opened upward, a keyboard portion disposed in the musical instrument case and exposed on the upper front side of the musical instrument case, and located behind the keyboard portion. A speaker disposed in a case, a partition member provided between the keyboard portion and the speaker, and partitioning the instrument case into a keyboard side space and a speaker side space, and configured to be housed in the instrument case The keyboard portion is covered in a state where it is not stored in the musical instrument case, and the keyboard portion is exposed in a state where it is stored in the musical instrument case, and the partition member is tilted according to the stored state to tilt the keyboard. A keyboard instrument comprising: a keyboard lid that opens and closes between a side space and the speaker side space.

  According to the present invention, when the keyboard cover is stored in the instrument case, the operation member can tilt the partition member in accordance with the stored state of the keyboard cover. The space can be opened and closed. For this reason, when the space between the keyboard side space and the speaker side space is closed by the partition member, the speaker side space can be formed as an acoustic space, so that the sound quality can be improved. In addition, when the space between the keyboard side space and the speaker side space is opened by the partition member, a sound emission path can be formed in the keyboard side space, so that the sound quality can be changed by this sound emission path. As a result, the sound quality can be changed simply by changing the opening position of the keyboard lid.

In 1st Embodiment which applied this invention to the electronic keyboard musical instrument, it is sectional drawing which showed the state which closed the keyboard cover. FIG. 2 is a cross-sectional view showing a state in which the keyboard cover exposes the keyboard part in the first storage state and the keyboard side space and the speaker side space are partitioned and closed by a partition plate in the electronic keyboard instrument shown in FIG. 1. is there. In the electronic keyboard instrument shown in FIG. 2, the keyboard portion is exposed in the second storage state in which the keyboard cover is further stored inside the instrument case, and the keyboard side space and the speaker side space are opened. It is sectional drawing shown. In 2nd Embodiment which applied this invention to the electronic keyboard instrument, it is sectional drawing which showed the state which closed the keyboard cover. FIG. 5 is a cross-sectional view showing a state in which the keyboard cover exposes the keyboard part in the first stored state and is partitioned and closed between the keyboard side space and the speaker side space by a partition plate in the electronic keyboard instrument shown in FIG. 4. is there. In the electronic keyboard instrument shown in FIG. 5, the keyboard portion is exposed in the second storage state in which the keyboard cover is further stored inside the instrument case, and the space between the keyboard side space and the speaker side space is opened. It is sectional drawing shown. In a third embodiment in which the present invention is applied to an electronic keyboard instrument, the keyboard lid exposes the keyboard portion in the first storage state, and shows a state in which the keyboard side space and the speaker side space are partitioned by a partition plate and blocked. FIG. In the electronic keyboard instrument shown in FIG. 7, the keyboard portion is exposed in the second storage state in which the keyboard cover is further stored inside the instrument case, and the keyboard side space and the speaker side space are opened. It is sectional drawing shown.

(First embodiment)
A first embodiment in which the present invention is applied to an electronic keyboard instrument will be described below 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 to 3, 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 on the rear upper portion of the pair of side plates 5 and the upper portion of the rear plate 4.

  In this case, as shown in FIGS. 1 to 3, 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 which inclines back from the part toward the intermediate part. 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 of the pair of side plates 5 is opened upward.

  In the musical instrument case 1, a keyboard portion 7 is provided as shown in FIGS. The keyboard unit 7 includes a keyboard chassis 8 disposed on the bottom plate 2 of the musical instrument case 1 and a plurality of keys 9 arranged in parallel on the keyboard chassis 8 so as to be rotatable in the vertical direction. . As shown in FIGS. 2 and 3, the keyboard portion 7 is configured to be depressed by a plurality of keys 9 exposed from the front side of the musical instrument case 1.

  Moreover, in the musical instrument case 1, as shown in FIGS. 1 to 3, the speaker 10 is disposed downward with the speaker 10 positioned behind the keyboard portion 7. The speaker 10 is configured to generate a musical tone having a pitch corresponding to each key 9 when each key 9 of the keyboard unit 7 is pressed. In this case, the bottom plate 2 of the musical instrument case 1 is provided with a sound emission hole 2 a that emits the sound of the speaker 10 toward the lower side of the musical instrument case 1. In the musical instrument case 1, a console panel 12 is provided so as to be inclined from the upper side located at the rear part of the keyboard part 7 toward the lower side of the front part of the top plate 6.

  On the other hand, in the musical instrument case 1, as shown in FIGS. 1 to 3, a keyboard lid 13 that covers the upper side of the keyboard portion 7 is provided so as to be opened and closed by a lid guide portion 14. 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 so as to be bent by a hinge 17. In this state, the keyboard 7 is opened upward. When stored in the musical instrument case 1, the front lid 15 and the rear lid 16 are configured to be folded and stored by a hinge 17.

  In this case, at the front end portion of the front lid 15, as shown in FIGS. 1 to 3, guide shafts 15 a that protrude toward the inner surfaces of the pair of side plates 5 are provided via support legs 15 b. Further, guide shafts 16 a that protrude toward the inner surfaces of the pair of side plates 5 are provided at the front end portion of the rear lid 16 via support legs 16 b. A shaft attachment plate 16c described later is attached to the rear end portion of the rear lid 16.

  As shown in FIGS. 1 to 3, the lid guide portion 14 has a front lid 15 and a rear lid 16 arranged in a substantially flat shape when the keyboard lid 13 covers the upper side of the keyboard portion 7, and the keyboard lid 13. When the keyboard portion 7 is opened upward, the front lid 15 and the rear lid 16 are folded by a hinge 17, and the folded rear lid 16 is arranged between the rear portion of the keyboard portion 7 and the speaker 10. Has been.

  That is, the lid guide part 14 includes a guide rail part 18 and a guide member 19 as shown in FIGS. The guide rail portion 18 is obliquely upward on the inner surfaces of the pair of side plates 5 from the upper side of the front plate 3 through the upper side of the console panel 12 toward a position corresponding to the lower side of the substantially middle portion in the front-rear direction of the top plate 6. It is provided with an inclination. The guide rail portion 18 is configured to guide the guide shaft 15a of the front lid 15 and the guide shaft 16a of the rear lid 16 in the front-rear direction.

  Thereby, as shown in FIG. 1, when the front lid 15 and the rear lid 16 cover the upper side of the keyboard portion 7, 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. In this case, a concave portion 18a for restricting the position of the guide shaft 16a of the rear lid 16 when the front lid 15 and the rear lid 16 cover the upper side of the keyboard portion 7 is provided in an almost middle portion of the guide rail portion 18. ing.

  As shown in FIGS. 1 to 3, 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 7, and is rotatable on the support shaft 20. And the connecting shaft 22 that rotatably connects the end portion of the arm portion 21 and the shaft mounting plate 16c of the rear lid 16 to each other. In this case, a guide shaft 23 is provided at an intermediate portion of the arm portion 21, and a pinion gear 24 is rotatably attached to the guide shaft 23.

  That is, as shown in FIGS. 1 to 3, the guide shaft 23 of the arm portion 21 is guided while drawing an arc in the vertical direction along the guide groove 26 of the guide plate 25 provided on the inner surface of the pair of side plates 5. It is comprised so that. The guide groove 26 is provided in the guide plate 25 in a semicircular arc shape with the support shaft 20 as the center.

  Further, as shown in FIGS. 1 to 3, the pinion gear 24 of the guide shaft 23 is configured to move while drawing an arc in the vertical direction while meshing with the guide gear 27 of the guide plate 25 and rotating. . Similarly to the guide shaft 23, the guide gear 27 is also provided on the guide plate 25 in a semicircular shape with the support shaft 20 as the center.

  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 7 and close the lid guide portion 14, the guide shaft 15 a of the front lid 15 is moved. The guide rail 16 is positioned at the front end, the guide shaft 16a of the rear cover 16 is positioned at the recess 18a of the guide rail 18 and the connecting shaft 22 positioned at the rear end of the rear cover 16 is the arm of the guide member 19. By being positioned at substantially the same height as the guide rail portion 18 by the portion 21, the front lid 15 and the rear lid 16 are arranged in a flat plate shape in a state where they are inclined forward and downward.

  In this case, as shown in FIG. 1, the lid guide portion 14 is erected by the arm portion 21 rotating counterclockwise around the support shaft 20, and at the same time, the guide shaft 23 is guided by the guide groove 26 of the guide plate 25. , And the pinion gear 24 meshes with the guide gear 27 of the guide plate 25 and moves from the lower side to the upper side while rotating, whereby the rear end portion of the rear lid 16 is moved. The connecting shaft 22 is pushed up.

  2 and 3, when the keyboard lid 13 is opened and the keyboard portion 7 is opened upward, the lid guide portion 14 is configured so that the guide shaft 15a of the front lid 15 is located above the console panel 12, That is, the front plate 15 is placed at the position of the guide rail portion 18 located below the front end of the top plate 6, and the guide shaft 16 a of the rear cover 16 is located at the rear end portion of the guide rail portion 18. The rear cover 16 is bent with a hinge 17 with respect to the front cover 15 and the connecting shaft 22 located at the rear end of the rear cover 16 is pulled down by the arm portion 21 of the guide member 19. The rear cover 16 is configured to be disposed between the rear portion of the keyboard portion 7 and the speaker 10.

  In this case, as shown in FIGS. 2 and 3, in the lid guide portion 14, the arm portion 21 rotates clockwise around the support shaft 20, and at the same time, the guide shaft 23 is guided by the guide plate 25. As the pinion gear 24 moves from the upper side to the lower side along the groove 26, the pinion gear 24 meshes with the guide gear 27 of the guide plate 25 and moves from the upper side to the lower side while rotating. It is comprised so that the connection shaft 22 of an edge part may be pulled down.

  By the way, in the musical instrument case 1, as shown in FIGS. 1-3, the partition plate 30 which partitions between the keyboard part 7 and the speaker 10 is the front-back direction (a left-right direction in FIG. 1) with a pair of support shaft 31. It is attached to be rotatable. The partition plate 30 has a vertical length that is substantially the same as the length between the lower surface of the top plate 6 and the upper surface of the bottom plate 2, and the length of the keyboard portion 7 in the key arrangement direction is a pair of side plates 5. It is formed to have almost the same length as that between them. In addition, cushion materials 30 a are respectively provided at the upper end portion and the lower end portion of the partition plate 30.

  As shown in FIGS. 1 to 3, the pair of support shafts 31 are provided on the inner surfaces of the pair of side plates 5 of the instrument case 1 so as to project into the instrument case 1, and the partition plates 30 are provided at the projecting tip portions. It is comprised so that each end surface located in the both sides of may be attached rotatably. Thus, the partition plate 30 is configured to open and close between the keyboard side space K1 and the speaker side space K2 by rotating about the pair of support shafts 31 and tilting in the front-rear direction of the musical instrument case 1. ing.

  Further, as shown in FIGS. 1 to 3, the partition plate 30 is urged toward a position where the keyboard side space K <b> 1 and the speaker side space K <b> 2 are partitioned and closed by the spring force of the spring member 32. . The spring member 32 is a torsion coil spring, and the coil portion is wound around the support shaft 31. In this state, the one end portion 31a abuts on the rear surface (right side surface in FIG. 1) and the other end portion 31b. Is configured to abut against a pin member 33 provided on the inner surface of the side plate 5.

  In this case, a position restricting portion 34 that restricts the rotational position of the partition plate 30 is provided on the lower surface of the top plate 6 in the musical instrument case 1 as shown in FIGS. When the partition plate 30 is in a state in which the partition plate 30 partitions and closes the keyboard side space K1 and the speaker side space K2, the front surface (the left side surface in FIG. 1) of the partition plate 30 is applied. It is comprised so that the rotation position of the partition plate 30 may be controlled by contacting.

  Further, as shown in FIGS. 1 to 3, when the keyboard cover 13 exposes the keyboard part 7, the partition plate 30 is tilted according to the open position of the keyboard cover 13, as shown in FIGS. An operation projection 35 is provided as an operation member for opening and closing between the keyboard side space K1 and the speaker side space K2. The operation projection 35 is provided to project rearward from the upper part of the rear end portion of the front lid 15 of the keyboard lid 13. For this reason, the front cover 15 is provided with a protrusion storage portion 36 for storing the operation protrusion 35 when the front cover 15 and the rear cover 16 are arranged in a substantially flat shape covering the keyboard portion 7. It has been.

  As shown in FIGS. 2 and 3, the keyboard cover 13 includes a first exposed state in which the keyboard portion 7 is exposed, and a second exposed state in which the keyboard portion 7 is further exposed from the first exposed state. , Is configured to open. Thereby, when the keyboard cover 13 exposes the keyboard part 7 in the first exposed state, the keyboard cover 13 is stored in the instrument case 1 and the keyboard part 7 is in the second exposed state. When exposed, it is configured to be stored in the second storage state in which the keyboard lid 13 is further pushed in from the first storage state.

  That is, as shown in FIGS. 2 and 3, the keyboard lid 13 is housed in the instrument case 1, the front end of the front lid 15 is located below the front end of the top plate 6, and the rear lid 16 is in front. When it hangs at a substantially right angle with respect to the lid 15, it enters the first storage state, and is stored in the musical instrument case 1 so that the front end of the front lid 15 is located behind the front end of the top plate 6, When the rear cover 16 is pushed at the rear part of the front cover 15 and further rotates around the hinge 17 and tilts backward, the second cover is configured.

  In this case, as shown in FIG. 2, the keyboard cover 13 is stored in the instrument case 1 and is in the first storage state where the front end of the front cover 15 is located below the front end of the top plate 6. The position of the guide shaft 15a of the front lid 15 is restricted by the shaft restricting portion 37 provided on the guide rail portion 18, and the guide shaft 23 of the arm portion 21 abuts on the lower end portion of the guide groove 26 of the guide plate 25 and The lid 16 is configured to be regulated in position.

  In this case, as shown in FIGS. 1 to 3, the shaft restricting portion 37 is a concave portion provided in the guide rail portion 18 at a location located below the front end portion of the top plate 6. The keyboard cover 13 is further pushed into the instrument case 1 from the first storage state, and the rear cover 16 tilts rearward when the rear cover 16 is in the second storage state in which the rear cover 16 is further rotated around the hinge 17. It is configured as follows.

  As a result, as shown in FIG. 2, the operation projection 35 is configured such that the keyboard lid 13 is accommodated in the musical instrument case 1 and the front end of the front lid 15 is located below the front end of the top plate 6. It is configured to approach or come into contact with the upper front portion of the partition plate 30 when the 16 is in the first storage state that hangs substantially perpendicular to the front lid 15. For this reason, even if the operation projection 35 moves with the opening operation of the keyboard lid 13, the partition plate 30 is not tilted by the operation projection 35, and between the keyboard side space K1 and the speaker side space K2. It is configured to maintain a closed and closed state.

  Further, as shown in FIG. 3, the operation projection 35 is configured such that the keyboard lid 13 is housed in the musical instrument case 1 and the front end of the front lid 15 is located behind the front end of the top plate 6. When the lid 16 is further rotated around the hinge 17 and tilted rearward, the front upper portion of the partition plate 30 is pressed to tilt the partition plate 30 against the spring force of the spring member 32. It is configured as follows. Accordingly, the partition plate 30 is configured to switch to an open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened by tilting about the pair of support shafts 31 and tilting backward. .

  Therefore, as shown in FIG. 2, the keyboard lid 13 is housed in the musical instrument case 1, and the front end of the front lid 15 is located below the front end of the top plate 6. 15a is regulated by the shaft restricting portion 37 of the guide rail portion 18, and when the rear lid 16 is suspended in a substantially right angle with respect to the front lid 15, it is partitioned by the operation projection 35 of the front lid 15. The plate 30 is not tilted, and is configured to maintain a closed state in which the space between the keyboard side space K1 and the speaker side space K2 is closed by the partition plate 30.

  As shown in FIG. 3, the keyboard lid 13 is housed in the musical instrument case 1, and the front end of the front lid 15 is located behind the front end of the top plate 6. When the shaft 15a gets over the shaft restricting portion 37 of the guide rail portion 18 and the rear cover 16 is further rotated about the hinge 17 and tilted rearward, the operation projection portion 35 is separated from the partition plate 30. The partition plate 30 is configured to tilt against the spring force of the spring member 32 by pressing the upper end portion thereof.

  Thereby, as shown in FIG. 3, the partition plate 30 is configured to switch to an open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened. In this case, when the partition plate 30 is switched to the open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened, the first release between the upper end portion of the partition plate 30 and the lower surface of the top plate 6 is achieved. A sound path 38 a is formed, and a second sound emission path 38 b is formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3.

  That is, as shown in FIG. 3, the first sound emission path 38 a includes a gap formed between the upper end portion of the partition plate 30 and the lower surface of the top plate 6, the upper surface of the front lid 15, and the lower surface of the top plate 6. Is formed on the upper side of the keyboard lid 13 by the gap formed between the two and the sound, and the sound in the speaker side space K2 is emitted from the upper side in the musical instrument case 1 toward the front side of the musical instrument case 1. ing.

  Further, as shown in FIG. 3, the second sound emission path 38 b includes a gap formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3, and gaps between the plurality of keys 9 of the keyboard portion 7. Thus, the sound is formed on the lower side in the musical instrument case 1 and is emitted from the lower side in the musical instrument case 1 toward the front side of the musical instrument case 1.

Next, the operation of such an electronic keyboard instrument will be described.
When playing with this electronic keyboard instrument, first, the keyboard lid 13 is opened to open the keyboard portion 7 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 rearward along the guide rail portion 18, and the arm portion 21 rotates clockwise around the support shaft 20, While the rear lid 16 is gradually bent at the hinge 17, the connecting shaft 22 of the rear lid 16 moves from the upper side toward the lower side.

  At this time, the guide shaft 23 moves from the upper side to the lower side along the guide groove 26 as the arm portion 21 rotates, and the pinion gear 24 meshes with the guide gear 27 and rotates from the upper side to the lower side. Move towards. As a result, the keyboard lid 13 has the front lid 15 and the rear lid 16 gradually bent at the hinge 17, and the folded rear lid 16 is positioned between the rear portion of the keyboard portion 7 and the partition plate 30. It moves from the upper side to the lower side along the front surface of 30.

  Then, when the front lid 15 is disposed below the top plate 6 of the musical instrument case 1 and the position of the guide shaft 15a of the front lid 15 is regulated by the shaft regulating portion 37 of the guide rail portion 18, as shown in FIG. In addition, the keyboard lid 13 is stored in the instrument case 1 in the first storage state, and the keyboard portion 7 is exposed on the upper side of the instrument case 1 in the first exposure state. At this time, as the arm portion 21 rotates, the guide shaft 23 comes into contact with the lower end portion of the guide groove 26, the pinion gear 24 is positioned at the lower end portion of the guide gear 27, and the rear lid 16 is in relation to the front lid 15. It is bent at an angle of approximately 90 degrees and is arranged between the rear part of the keyboard part 7 and the partition plate 30.

  At this time, the operation projection 35 of the front lid 15 approaches or contacts the partition plate 30. For this reason, the partition plate 30 is not pushed by the operation projection part 35 and does not rotate around the pair of support shafts 31, and therefore does not tilt. Thereby, since the partition plate 30 maintains the state which contact | abutted to the position control part 34 with the spring force of the spring member 32, the closed state which block | closed between the keyboard side space K1 and the speaker side space K2 is maintained.

  Thereby, the speaker side space K2 is formed in the musical instrument case 1 as an acoustic space. In this state, the keyboard portion 7 is opened upward and the plurality of keys 9 are exposed upward, so that a performance is possible. In this state, when a plurality of keys 9 of the keyboard unit 7 exposed from the front side of the musical instrument case 1 are pressed and played, the speaker 10 generates a musical tone having a pitch corresponding to the key pressing operation. .

  Of the musical sounds generated by the speaker 10, the high-frequency sound is emitted toward the lower side of the musical instrument case 1 through the sound emission holes 2 a provided in the bottom plate 2 of the musical instrument case 1. Further, the low-frequency sound is emitted into the speaker-side space K2 of the musical instrument case 1. Since the speaker-side space K2 is an acoustic space by the partition plate 30, the sound quality of the low-frequency sound is enhanced in the speaker-side space K2.

  On the other hand, when changing the sound quality of the sound generated by the speaker 10, as shown in FIG. 3, the front cover 15 of the keyboard cover 13 in the first storage state is further pushed into the instrument case 1, and the front cover 15 The front end portion is positioned behind the front end portion of the top plate 6. At this time, the guide shaft 15a of the front lid 15 passes over the shaft restricting portion 37 of the guide rail portion 18, and the rear lid 16 is pushed by the rear portion of the front lid 15 to further rotate around the hinge 17 and tilt backward. 2 and the keyboard part 7 is exposed to the upper side of the musical instrument case 1 in the second exposed state.

  At this time, as shown in FIG. 3, the operation projection 35 provided at the rear end portion of the front lid 15 presses the upper end portion of the partition plate 30 toward the rear, and the partition plate 30 is pressed by the spring force of the spring member 32. Rotate against and tilt backwards. Thereby, the partition plate 30 switches to the open state which open | releases between the keyboard side space K1 and the speaker side space K2.

  That is, when the partition plate 30 rotates about the pair of support shafts 31 against the spring force of the spring member 32, as shown in FIG. 3, the partition plate 30 is tilted rearward, and the keyboard side space K1 and the speaker side space K2 are inclined. Between the two. Thereby, the first sound emission path 38 a is formed between the upper end portion of the partition plate 30 and the lower surface of the top plate 6, and the second sound emission is formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3. A path 38b is formed.

  In this state, when a plurality of keys 9 of the keyboard unit 7 exposed from the front side of the musical instrument case 1 are pressed and played, the speaker 10 generates a musical tone having a pitch corresponding to the key pressing operation. . Of the musical sounds generated by the speaker 10, the high-frequency sound is emitted toward the lower side of the musical instrument case 1. Further, the low-frequency sound is emitted into the speaker-side space K2 of the musical instrument case 1. Since the low-frequency sound emitted in the speaker-side space K2 is emitted toward the front side of the musical instrument case 1 through the first sound emission path 38a and the second sound emission path 38b, the sound quality is flat. It changes to the sound quality of the state.

  That is, the first sound emission path 38 a is formed between the gap formed between the upper end portion of the partition plate 30 and the lower surface of the top plate 6, and between the upper surface of the front lid 15 and the lower surface of the top plate 6. By being formed on the upper side of the keyboard lid 13 by the gap, the sound in the speaker-side space K2 is emitted from the upper side in the musical instrument case 1 toward the front side of the musical instrument case 1.

  Further, the second sound emission path 38 b is formed under the keyboard lid 13 by a gap formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3 and each gap of the plurality of keys 9 of the keyboard portion 7. By being formed on the side, the sound in the speaker-side space K2 is emitted from the lower side in the musical instrument case 1 toward the front side of the musical instrument case 1. As a result, the sound quality in the speaker-side space K2 changes to a flat sound quality and is emitted.

  On the other hand, when not playing, the keyboard lid 13 is closed to cover the keyboard portion 7. At this time, the front end of the front lid 15 of the keyboard lid 13 is pulled out toward the front side of the musical instrument case 1. Then, the guide shaft 15 a of the front lid 15 and the guide shaft 16 a of the rear lid 16 move to the front side along the guide rail portion 18, and the connecting shaft 22 of the rear lid 16 is pushed up by the arm portion 21 of the guide member 19.

  That is, the arm portion 21 of the guide member 19 rotates counterclockwise around the support shaft 20 as the rear lid 16 moves, and pushes up the connecting shaft 22 of the rear lid 16. At this time, the guide shaft 23 moves from the lower side to the upper side along the guide groove 26, and the pinion gear 24 meshes with the guide gear 27 and moves from the lower side to the upper side. The lid 16 is bent in a direction in which it is gradually pushed out by the hinge 17 and moves toward the front side of the musical instrument case 1.

  When the position of the guide shaft 15a of the front lid 15 is restricted by the shaft restricting portion 37 of the guide rail portion 18, the front end portion of the front lid 15 is placed below the front end portion of the top plate 6 as shown in FIG. It is located and it will be in the 1st stowed state where the back cover 16 was hung down substantially at right angles with respect to the front cover 15. At this time, since the operation projection 35 of the front lid 15 approaches or contacts the front surface of the partition plate 30, the partition plate 30 is counterclockwise about the pair of support shafts 31 by the spring force of the spring member 32. It rotates to close the space between the keyboard side space K1 and the speaker side space K2.

  In this state, the keyboard lid 13 is further pulled out to the front side of the musical instrument case 1, and the guide shaft 15 a of the front lid 15 is located at the front end of the guide rail portion 18 located on the front plate 3 of the musical instrument case 1. The guide shaft 16a is positioned in the recess 18a in the middle portion of the guide rail portion 18, the connecting shaft 22 positioned at the rear end portion of the rear lid 16 is positioned at the upper end portion of the guide groove 26, and the pinion gear 16c is guided. When positioned at the upper end portion of the gear 27, the front lid 15 and the rear lid 16 are arranged in a flat plate shape in a state where they are inclined forward and downward. As a result, the keyboard portion 7 is covered with the front lid 15 and the rear lid 16.

  As described above, according to the electronic keyboard instrument, the instrument case 1 is provided so as to be tiltable in the front-rear direction of the instrument case 1 between the keyboard unit 7 provided in the instrument case 1 and the speaker 10. A partition plate 30 that can be opened and closed between the side space K1 and the speaker side space K2, and when the keyboard cover 13 exposes the keyboard section 7, the partition plate 30 is tilted according to the open position of the keyboard cover 13 to By providing an operation projection 35 that is an operation member for opening and closing between the side space K1 and the speaker side space K2, the sound quality of the speaker side space K2 can be selected simply by changing the opening position of the keyboard lid 13. Can be changed.

  That is, in this electronic keyboard instrument, when the keyboard lid 13 is opened and the keyboard portion 7 is exposed, the operation projection 35 can tilt the partition plate 30 in accordance with the open position of the keyboard lid 13. The space between the keyboard side space K1 and the speaker side space K2 in the case 1 can be opened and closed. For this reason, when the space between the keyboard side space K1 and the speaker side space K2 is closed by the partition plate 30, the speaker side space K2 can be formed as an acoustic space, so that the sound quality is enhanced in the speaker side space K2. Can do.

  Also, in this electronic keyboard instrument, when the operation projection 35 tilts the partition plate 30 according to the open position of the keyboard lid 13, the partition plate 30 opens between the keyboard side space K1 and the speaker side space K2. Furthermore, since the first and second sound emission paths 38a and 38b can be formed in the keyboard side space K1, the sound in the speaker side space K2 can be passed through the first and second sound emission paths 38a and 38b. Can be emitted from the musical instrument case 1 toward the front side of the musical instrument case 1, whereby the sound quality can be changed to a flat sound quality.

  For this reason, according to this electronic keyboard instrument, the partition plate 30 can open and close the keyboard side space K1 and the speaker side space K2 simply by changing the opening position of the keyboard lid 13. When the keyboard side space K1 and the speaker side space K2 are partitioned and closed, the speaker side space K2 can be formed as an acoustic space in the instrument case 1 to improve sound quality.

  In this electronic keyboard instrument, the first and second sound emission paths 38a and 38b are formed in the instrument case 1 when the partition plate 30 opens the space between the keyboard side space K1 and the speaker side space K2. Since the sound in the speaker side space K2 can be emitted toward the front side of the musical instrument case 1, the sound quality can be easily changed.

  In this case, the keyboard lid 13 is opened to a first exposed state in which the keyboard portion 7 is exposed, and a second exposed state in which the keyboard portion 7 is further exposed from the first exposed state, whereby the keyboard portion 7 is exposed. When the keyboard cover 13 is stored in the musical instrument case 1 (ie, the first exposed state), and the second storage state in which the keyboard cover 13 is further pushed from the first stored state ( In other words, the second exposed state) can be stored, and in this first stored state, the keyboard side space K1 and the speaker side space K2 can be partitioned and closed by the partition plate 30. In the two storage state, the partition plate 30 can be tilted to open the space between the keyboard side space K1 and the speaker side space K2.

  Further, the operation projection 35 which is an operation member is provided with the partition plate 30 when the keyboard lid 13 exposes the keyboard portion 7 in the first exposed state (that is, in the first storage state) with the opening operation of the keyboard lid 13. Without being tilted, the partition plate 30 maintains the space between the keyboard side space K1 and the speaker side space K2 in a closed state, and the keyboard cover 13 exposes the keyboard portion 7 in the second exposed state (that is, the second storage state). When the keyboard cover 13 is opened, the partition plate 30 is tilted to switch to an open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened. Thus, the keyboard side space K1 and the speaker side space K2 can be reliably opened and closed.

  In this case, in this electronic keyboard instrument, the pair of support shafts 31 that support the partition plate 30 so as to be rotatable in the front-rear direction and the keyboard side space K1 and the speaker side space K2 are partitioned in the instrument case 1 so as to close the position. By providing the spring member 32 that is an urging member for urging the plate 30, the partition plate 30 can be smoothly and satisfactorily rotated about the pair of support shafts 31 and tilted. The partition plate 30 can be positively biased toward the position where the space between the keyboard side space K1 and the speaker side space K2 is blocked by the member 32, thereby partitioning the keyboard side space K1 and the speaker side space K2. The plate 30 can be opened and closed satisfactorily.

  In addition, the keyboard lid 13 has a front lid 15 and a rear lid 16 connected to each other by a hinge 17 so that the keyboard lid 13 can be bent and slidably provided in the musical instrument case 1. By folding and unfolding at 17, the keyboard part 7 can be reliably and satisfactorily covered, and when the keyboard lid 13 is stored in the instrument case 1, the front lid 15 and the rear lid 16 are hinged 17. Since it can be folded and stored in the instrument case 1 in a compact manner, the entire instrument case 1 can be made compact.

  In this case, since the keyboard lid 13 is guided by the lid guide portion 14, when the keyboard lid 13 is disposed on the upper side of the keyboard portion 7, the front lid 15 and the rear lid 16 are separated by the lid guide portion 14. Can be bent and arranged in a flat plate shape by a hinge 17, and when the keyboard lid 13 opens the keyboard portion 7 upward, the front lid 15 and the rear lid 16 are folded by the hinge 17 by the lid guide portion 14. The bent rear cover 16 can be disposed between the keyboard portion 7 and the partition plate 30, whereby the keyboard cover 13 can be smoothly guided, and the rear cover 16 can be disposed between the keyboard portion 7 and the partition plate. 30 can be reliably and well disposed.

  That is, the lid guide portion 14 includes a guide rail portion 18 and a guide member 19, and the guide rail portion 18 is formed on the inner surface of the pair of side plates 5 from the upper side of the front plate 3 to the lower side of the intermediate portion of the top plate 6. The guide shaft 19 is provided at an angle to the upper side of the front cover 15 and guides the guide shaft 15a of the front cover 15 and the guide shaft 16a of the rear cover 16 in the front-rear direction. The arm portion 21 rotates in the vertical direction around the support shaft 20 provided on the inner surface of the side plate 5 at a location located in the vicinity to guide the connecting shaft 22 of the shaft mounting plate 16c of the rear lid 16 in the vertical direction. Therefore, it is possible to smoothly guide the keyboard lid 13 while folding the front lid 15 and the rear lid 16 with the hinge 17.

  In this case, in the guide rail portion 18 of the lid guide portion 14, the keyboard lid 13 is accommodated in the instrument case 1 and the front end portion of the front lid 15 is located below the front end portion of the top plate 6. At this time, by providing the shaft restricting portion 37 for restricting the position of the guide shaft 15 a of the front lid 15, the keyboard lid 13 is accommodated in the instrument case 1, and the front end portion of the front lid 15 is the top plate 6. The guide shaft 15a of the front lid 15 can be restricted by the shaft restricting portion 37 of the guide rail portion 18 in the first storage state located below the front end portion, whereby the keyboard side space K1 and the speaker side can be restricted. The position of the partition plate 30 can be reliably and satisfactorily regulated in the closed state where the space K2 is closed.

  Further, an operation projection 35 which is an operation member is provided at the rear end portion of the front cover 15 of the keyboard cover 13, and the keyboard cover 13 is stored from the first storage state stored in the instrument case 1 to the second storage state. Since the keyboard-side space K1 and the speaker-side space K2 are opened by pressing and tilting the partition plate 30, the keyboard lid 13 is in the first stored state in the instrument case 1. When the operation projection 36 is stored in the closed position, the operation projection 36 only approaches or comes into contact with the partition plate 30 and does not tilt the partition plate 30, and the partition plate 30 closes the keyboard-side space K1 and the speaker-side space K2. Can be reliably maintained.

  The keyboard cover 13 is operated when the keyboard cover 13 is stored in the instrument case 1 in the first storage state and the keyboard cover 13 is further pushed into the instrument case 1 in the second storage state. The protrusion 36 presses the upper end of the partition plate 30 and can be tilted by rotating the partition plate 30 against the spring force of the spring member 32, so that the keyboard side space K1 and the speaker side can be surely and satisfactorily. It can switch to the open state which open | releases between the spaces K2.

(Second Embodiment)
Next, a second embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as 1st Embodiment shown by FIGS. 1-3.
As shown in FIGS. 4 to 6, the electronic keyboard instrument has a keyboard lid 40 and a lid guide portion 41 that are different from those of the first embodiment, and other than that, the electronic keyboard instrument has almost the same configuration as that of the first embodiment. Yes.

  That is, as shown in FIGS. 4 to 6, the keyboard cover 40 is formed of a single flat plate that is disposed above the keyboard portion 7 and covers the keyboard portion 7. A front guide shaft 42 that protrudes toward the inner surfaces of the pair of side plates 5 is attached to the front end portion of the keyboard lid 40 via a support portion 43. Further, attachment plates 44 are provided on both sides of the rear end portion of the keyboard lid 40, respectively.

  As shown in FIGS. 4 to 6, the lid guide portion 41 is arranged with the keyboard lid 40 tilted forward and downward when the keyboard lid 40 covers the upper side of the keyboard portion 7. When the keyboard part 7 is opened upward, the keyboard cover 40 is arranged between the rear part of the keyboard part 7 and the partition plate 30 in a state substantially parallel to the top plate 6. Also in this case, the lid guide portion 41 has a guide rail portion 45 and a guide member 46.

  As shown in FIGS. 4 to 6, the guide rail portion 45 is provided on the inner surfaces of the pair of side plates 5 so as to be inclined obliquely upward from the upper side of the front plate 3 toward the lower side of the top plate 6. The front guide shaft 42 is guided while being inclined in the front-rear direction. As a result, as shown in FIG. 4, the guide rail portion 45 has the front guide shaft 42 positioned at the front end portion of the guide rail portion 45 when the keyboard cover 40 covers the upper side of the keyboard portion 7, and FIG. As shown in FIG. 6, the front guide shaft 42 is configured to be positioned on the rear end side of the guide rail portion 45 when the keyboard cover 40 opens the upper side of the keyboard portion 7.

  As shown in FIGS. 4 to 6, the guide member 46 is attached to the rear guide shaft 47 that is rotatably attached to the attachment plate 44 at the rear end portion of the keyboard cover 40, and the rear guide shaft 47. A pinion gear 48 and a guide plate 49 provided on the inner surfaces of the pair of side plates 5 to guide the rear guide shaft 47 and the pinion gear 48 in a state substantially parallel to the top plate 6 are provided.

  As shown in FIGS. 4 to 6, the guide plate 49 is disposed at a position located between the upper side of the console panel 12 and the partition plate 30. In this case, the guide plate 49 is in a state where the guide groove 50 for guiding the rear guide shaft 47 located at the rear end portion of the keyboard cover 40 and the pinion gear 48 attached to the rear guide shaft 47 are engaged with each other. A rack gear 51 for guiding the gear 48 is provided.

  Thereby, as shown in FIG. 4, when the keyboard cover 40 is closed so as to cover the upper side of the keyboard part 7, the cover guide part 41 moves the front guide shaft 42 of the keyboard cover 40 to the front end part of the guide rail part 45. The rear guide shaft 47 of the keyboard cover 40 is positioned at the front end portion of the guide groove 50 of the guide plate 49, and the pinion gear 48 of the rear guide shaft 47 is positioned at the front end portion of the rack gear 51 of the guide plate 49. Thus, the keyboard lid 40 is arranged in a flat plate shape with the front lid inclined downward.

  Further, as shown in FIG. 5, the lid guide portion 41 is configured so that the front guide shaft 42 of the keyboard lid 40 is connected to the rear end portion of the guide rail portion 45 when the keyboard lid 40 is opened and the keyboard portion 7 is opened upward. And the rear guide shaft 47 of the keyboard cover 40 is positioned at the rear end portion of the guide groove 50 of the guide plate 49, and the pinion gear 48 of the rear guide shaft 47 is rear end portion of the rack gear 51 of the guide plate 49. The keyboard cover 40 is arranged between the rear portion of the keyboard portion 7 and the speaker 10 in a state substantially parallel to the top plate 6.

  Also in this case, in the musical instrument case 1, as shown in FIGS. 5 and 6, the partition plate 30 is located between the rear end portion of the guide plate 49 located behind the keyboard portion 7 and the speaker 10. Arranged in a state. Similar to the first embodiment, the partition plate 30 is attached by a pair of support shafts 31 so as to be rotatable in the front-rear direction (left-right direction in FIG. 4). Thereby, the partition plate 30 is configured to open and close between the keyboard side space K1 and the speaker side space K2.

  Further, as shown in FIGS. 4 to 6, the partition plate 30 is also urged toward the position where the keyboard side space K1 and the speaker side space K2 are partitioned and closed by the spring force of the spring member 32. . Also in this case, a position restricting portion 34 that restricts the rotational position of the partition plate 30 is provided on the lower surface of the top plate 6 in the musical instrument case 1. When the partition plate 30 is in a state in which the partition side 30 partitions and closes the keyboard side space K1 and the speaker side space K2, the upper end of the partition plate 30 comes into contact with the position restricting portion 34 to rotate the partition plate 30. It is comprised so that a position may be regulated.

  Further, as shown in FIGS. 4 to 6, when the keyboard cover 40 exposes the keyboard part 7, the partition plate 30 is attached to the keyboard cover 40 according to the open position of the keyboard cover 40. An operation projection 52 is provided as an operation member that opens and closes between the keyboard side space K1 and the speaker side space K2 by being pressed and tilted against force. The operation projection 52 is provided so as to protrude rearward from the rear end portion of the keyboard lid 40.

  In this case, as shown in FIG. 5 and FIG. 6, the keyboard lid 40 includes a first exposed state in which the keyboard portion 7 is exposed, and a second exposed state in which the keyboard portion 7 is further exposed from the first exposed state. , Is configured to open. Thereby, when the keyboard cover 40 exposes the keyboard part 7 in the first exposed state, the keyboard cover 40 is stored in the instrument case 1 and the keyboard part 7 is in the second exposed state. When exposed, it is configured to be stored in the second storage state in which the keyboard cover 40 is further pushed in from the first storage state.

  Further, as shown in FIGS. 4 to 6, the keyboard cover 40 has an operation projection 52 when the keyboard 7 is exposed in the first exposed state and stored in the instrument case 1 in the first stored state. The partition plate 30 is further stored in the instrument case 1 from the first storage state by closing the keyboard side space K1 and the speaker side space K2 and exposing the keyboard portion 7 in the second exposure state. When stored in the second storage state, the operation projection 52 switches the partition plate 30 between an open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened.

  Also in this case, as shown in FIG. 5, the keyboard cover 40 is stored in the musical instrument case 1 and is in the first storage state in which the front end of the keyboard cover 40 is located slightly in front of the front end of the top plate 6. At this time, the position of the front guide shaft 42 is restricted by a concave shaft restricting portion 45 a provided in the guide rail portion 45, so that the rear guide shaft 47 is positioned slightly in front of the rear end portion of the guide groove 50. In addition, the pinion gear 48 is configured to be located slightly in front of the rear end portion of the rack gear 51.

  Further, as shown in FIG. 6, the keyboard cover 40 is in a second storage state (ie, a second exposed state) in which the keyboard cover 40 is further pushed in from the first storage state stored in the instrument case 1. The front guide shaft 42 is located at the rear end portion of the guide rail portion 45, the rear guide shaft 47 is in contact with the rear end portion of the guide groove 50, The pinion gear 48 is configured to be regulated by contacting the rear end portion of the rack gear 51.

  As a result, as shown in FIG. 5, the operation projection 52 has a first case in which the keyboard lid 40 is housed in the musical instrument case 1 and the position of the front guide shaft 42 is restricted by the shaft restriction portion 45 a of the guide rail portion 45. It is comprised so that the front side upper part of the partition plate 30 may approach or contact in the accommodation state. For this reason, even if the operation projection 52 moves with the opening operation of the keyboard lid 40, the partition plate 30 is not tilted by the operation projection 52, and between the keyboard side space K1 and the speaker side space K2. The closed state is maintained, and the speaker side space K2 is formed as an acoustic space.

  Further, as shown in FIG. 6, the operation projection 52 is in the second storage state in which the keyboard cover 13 is stored in the instrument case 1 and further pushed into the instrument case 1 from the first storage state. The front upper portion of the partition plate 30 is pressed to tilt the partition plate 30 against the spring force of the spring member 32. Accordingly, the partition plate 30 is configured to switch to an open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened by tilting about the pair of support shafts 31 and tilting backward. .

  In this case, as shown in FIG. 6, when the partition plate 30 is switched to an open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened, the upper end portion of the partition plate 30 and the lower surface of the top plate 6 are displayed. The first sound emission path 53a is formed between the first sound emission path 53a and the second sound emission path 53b between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3.

  In this case, as shown in FIG. 6, the first sound emission path 53 a includes a gap formed between the upper end portion of the partition plate 30 and the lower surface of the top plate 6, the upper surface of the keyboard lid 40, and the top plate 6. It is formed on the upper side of the keyboard cover 40 by a gap formed between the lower surface and the sound in the speaker side space K2 is emitted from the upper side in the musical instrument case 1 toward the front side of the musical instrument case 1 Has been.

  Further, as shown in FIG. 6, the second sound emission path 53 b includes a gap formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3, and gaps between the plurality of keys 9 of the keyboard portion 7. Thus, the sound is formed on the lower side in the musical instrument case 1 and is emitted from the lower side in the musical instrument case 1 toward the front side of the musical instrument case 1.

Next, the operation of such an electronic keyboard instrument will be described.
When playing with this electronic keyboard instrument, first, the keyboard cover 40 is opened to open the keyboard portion 7 upward. At this time, the front end of the keyboard lid 40 is lifted and moved backward. Then, the front guide shaft 42 moves rearward along the guide rail portion 45, and the rear guide shaft 47 of the rear end portion of the keyboard lid 40 moves rearward along the guide groove 50 of the guide plate 49. The pinion gear 48 meshes with the rack gear 51 and moves backward while rotating. Thereby, the keyboard cover 40 moves between the keyboard unit 7 and the partition plate 30.

  Then, when the keyboard cover 40 is disposed on the lower side of the top plate 6 of the musical instrument case 1 and the front guide shaft 42 is positionally restricted by the shaft restricting portion 45a of the guide rail portion 45, as shown in FIG. The lid 40 is accommodated in the instrument case 1 in the first accommodation state, and the keyboard portion 7 is exposed on the upper side of the instrument case 1 in the first exposure state.

  At this time, as shown in FIG. 5, the rear guide shaft 47 located at the rear end of the keyboard cover 40 is located slightly forward of the rear end of the guide groove 50 of the guide plate 49, and the pinion gear 48 is The keyboard cover 40 is located slightly in front of the rear end portion of the rack gear 51, and the keyboard cover 40 is disposed between the rear portion of the keyboard portion 7 and the partition plate 30 in this state.

  At this time, as shown in FIG. 5, the operation projection 52 of the keyboard lid 40 approaches or contacts the partition plate 30. For this reason, since the partition plate 30 is not pushed by the operation projection part 52 and does not rotate around the pair of support shafts 31, it does not tilt. Thereby, since the partition plate 30 maintains the state which contact | abutted to the position control part 34 with the spring force of the spring member 32, the closed state which block | closed between the keyboard side space K1 and the speaker side space K2 is maintained.

  For this reason, the speaker side space K2 is formed as an acoustic space in the musical instrument case 1. In this state, the keyboard portion 7 is opened upward and the plurality of keys 9 are exposed upward, so that a performance is possible. In this state, when a plurality of keys 9 of the keyboard unit 7 exposed from the front side of the musical instrument case 1 are pressed and played, the speaker 10 generates a musical tone having a pitch corresponding to the key pressing operation. .

  Of the musical sounds generated by the speaker 10, the high-frequency sound is emitted toward the lower side of the musical instrument case 1 through the sound emission holes 2 a provided in the bottom plate 2 of the musical instrument case 1. Further, the low-frequency sound is emitted into the speaker-side space K2 of the musical instrument case 1. Since the speaker-side space K2 is an acoustic space by the partition plate 30, the sound quality of the low-frequency sound is enhanced in the speaker-side space K2.

  On the other hand, when the sound quality of the sound generated by the speaker 10 is changed, as shown in FIG. 6, the keyboard cover 40 in the first storage state is further pushed into the musical instrument case 1, and the front end of the keyboard cover 40 is moved upward. Located below the plate 6. At this time, the front guide shaft 42 of the keyboard lid 40 gets over the shaft restricting portion 45a of the guide rail portion 45, the front guide shaft 42 of the keyboard lid 40 is located at the rear end portion of the guide rail portion 45, and the rear guide shaft 47 Is located at the rear end of the guide groove 50, and the pinion gear 48 is located at the rear end of the rack gear 51.

  Thereby, the keyboard lid 40 is changed from the first storage state to the second storage state where the keyboard cover 40 is further pushed into the musical instrument case 1, and the keyboard portion 7 is exposed to the upper side of the musical instrument case 1 in the second exposure state. At this time, as shown in FIG. 6, the operation projection 52 provided at the rear end of the keyboard lid 40 presses the upper end of the partition plate 30, thereby resisting the partition plate 30 against the spring force of the spring member 32. Rotate and tilt. Thereby, the partition plate 30 switches to the open state which opens between the keyboard side space K1 and the speaker side space K2.

  That is, when the partition plate 30 rotates around the pair of support shafts 31 against the spring force of the spring member 32, as shown in FIG. 6, the partition plate 30 tilts rearward, and the keyboard side space K1 and the speaker side space K2 Between the two. Thereby, a first sound emission path 53 a is formed between the upper end portion of the partition plate 30 and the lower surface of the top plate 6, and a second sound emission is formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3. A path 53b is formed.

  In this state, when a plurality of keys 9 of the keyboard unit 7 exposed from the front side of the musical instrument case 1 are pressed and played, the speaker 10 generates a musical tone having a pitch corresponding to the key pressing operation. . Of the musical sounds generated by the speaker 10, the high-frequency sound is emitted toward the lower side of the musical instrument case 1. Further, the low-frequency sound is emitted into the speaker-side space K2 of the musical instrument case 1. Since the low-frequency sound emitted in the speaker-side space K2 is emitted toward the front side of the musical instrument case 1 through the first sound emission path 53a and the second sound emission path 53b, the sound quality is flat. It changes to the sound quality of the state.

  That is, the first sound emission path 53 a is formed between the gap formed between the upper end portion of the partition plate 30 and the lower surface of the top plate 6, and between the upper surface of the keyboard lid 40 and the lower surface of the top plate 6. By being formed on the upper side of the keyboard lid 40 by the gap, the sound in the speaker side space K2 is emitted from the upper side in the musical instrument case 1 toward the front side of the musical instrument case 1.

  Further, the second sound emission path 53 b is formed in the instrument case 1 by a gap formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3 and each gap of the plurality of keys 9 of the keyboard portion 7. By being formed on the lower side, the sound in the speaker-side space K2 is emitted from the lower side in the instrument case 1 toward the front side of the instrument case 1. As a result, the sound quality in the speaker-side space K2 changes to a flat sound quality and is emitted.

  On the other hand, when not performing, the keyboard cover 40 is closed to cover the keyboard portion 7. At this time, the front end portion of the keyboard lid 40 is pulled out toward the front side of the musical instrument case 1. Then, the front guide shaft 42 of the keyboard cover 40 moves forward along the guide rail portion 45, the rear guide shaft 47 of the keyboard cover 40 moves forward along the guide groove 50 of the guide member 46, and the pinion The gear 48 meshes with the rack gear 51 and moves to the front side.

  When the position of the front guide shaft 42 of the keyboard lid 40 is restricted by the shaft restriction portion 45a of the guide rail portion 45, the front end portion of the keyboard lid 40 is slightly smaller than the front end portion of the top plate 6, as shown in FIG. It will be in the 1st accommodation state where it is located in the front side and the rear end part of the keyboard cover 40 is located in front of the rear end part of the guide member 46 a little. At this time, the operation projection 52 of the keyboard lid 40 is in a state of approaching or contacting the front surface of the partition plate 30. For this reason, the partition plate 30 rotates counterclockwise around the pair of support shafts 31 by the spring force of the spring member 32 and closes the space between the keyboard side space K1 and the speaker side space K2.

  In this state, the keyboard cover 40 is further pulled out to the front side of the musical instrument case 1, and the front guide shaft 42 of the keyboard cover 40 is located at the front end of the guide rail portion 45 located on the front plate 3 of the musical instrument case 1. When the guide shaft 47 is positioned at the front end portion of the guide groove 50 of the guide plate 49 and the pinion gear 48 is positioned at the front end portion of the rack gear 51, the keyboard cover 40 is disposed in a state of being inclined forwardly downward. Thereby, the keyboard part 7 is covered with the keyboard cover 40.

  As described above, according to the electronic keyboard instrument, when the keyboard cover 40 is opened to expose the keyboard part 7, the operation projection 52 as an operation member changes the partition plate 30 according to the open position of the keyboard cover 40. Since it can be tilted, the keyboard side space K1 and the speaker side space K2 in the musical instrument case 1 can be opened and closed as in the first embodiment. For this reason, when the space between the keyboard side space K1 and the speaker side space K2 is closed by the partition plate 30, the speaker side space K2 can be formed as an acoustic space, so that the sound quality can be improved.

  In this electronic keyboard instrument, when the operation projection 52 tilts the partition plate 30 in accordance with the open position of the keyboard lid 40 to open the space between the keyboard side space K1 and the speaker side space K2, the keyboard side Since the first and second sound emission paths 53a and 53b can be formed in the space K1, the sound in the speaker-side space K2 can be transmitted through the first and second sound emission paths 53a and 53b. The sound can be emitted from the inside toward the front side of the musical instrument case 1, and the sound quality can be changed to a flat sound quality.

  Therefore, also in this electronic keyboard instrument, the keyboard 30 can be opened and closed between the keyboard side space K1 and the speaker side space K2 by simply changing the opening position of the keyboard lid 40. When the side space K1 and the speaker side space K2 are partitioned and closed, the speaker side space K2 can be formed as an acoustic space in the instrument case 1 to improve sound quality.

  Also in this electronic keyboard instrument, when the partition plate 30 opens between the keyboard side space K1 and the speaker side space K2, the first and second sound emission paths 53a and 53b are provided in the instrument case 1. Since the sound in the speaker side space K2 can be emitted toward the front side of the musical instrument case 1, the sound quality can be easily changed.

  In this case, the keyboard cover 40 is opened to a first exposed state in which the keyboard portion 7 is exposed, and a second exposed state in which the keyboard portion 7 is further exposed from the first exposed state, whereby the keyboard portion is released. 7 can be stored in a first storage state in which the keyboard cover 40 is stored in the instrument case 1 and a second storage state in which the keyboard cover 40 is further pushed in from the first storage state. The partition side 30 can partition and close the keyboard side space K1 and the speaker side space K2 when in the 1 stowed state, and the partition plate 30 can be tilted in the second stowed state to separate the keyboard side space K1 from the keyboard side space K1. The space between the speaker side space K2 can be opened.

  In addition, the operation projection 52, which is an operation member, is formed by the partition plate 30 in accordance with the opening operation of the keyboard lid 40 when the keyboard lid 40 exposes the keyboard portion 7 in the first exposed state (that is, the first storage state). The partition plate 30 keeps the keyboard-side space K1 and the speaker-side space K2 closed, and the keyboard cover 40 exposes the keyboard portion 7 in the second exposed state (that is, the second storage state). When the keyboard cover 40 is opened, the partition plate 30 is tilted in accordance with the opening operation of the keyboard cover 40 to switch to the open state in which the space between the keyboard side space K1 and the speaker side space K2 is opened. Accordingly, the keyboard side space K1 and the speaker side space K2 can be opened and closed reliably and satisfactorily.

  In this electronic keyboard instrument, the keyboard lid 40 is formed of a single flat plate, so that the keyboard portion 7 can be reliably and satisfactorily covered with the keyboard lid 40 with a simple structure. 40 can be easily and satisfactorily stored in the musical instrument case 1. In this case, the lid guide portion 41 for guiding the keyboard lid 40 is arranged in a flat plate shape with the keyboard lid 40 inclined forward and downward when the keyboard lid 40 is arranged on the upper side of the keyboard portion 7, and When the keyboard cover 40 opens the keyboard part 7 upward, the keyboard cover 40 is disposed between the rear part of the keyboard part 7 and the partition plate 30 in a state substantially parallel to the top plate 6 of the musical instrument case 1. The lid 40 can be smoothly guided.

  That is, the keyboard lid 40 is configured to be guided by the lid guide portion 41, the lid guide portion 41 has a guide rail portion 45 and a guide member 46, and the guide rail portion 45 is formed of the pair of side plates 5. It is provided on the inner surface so as to be inclined obliquely upward from the upper side of the front plate 3 toward the rear plate 4, and guides the front guide shaft 42 of the keyboard lid 40 in the front-rear direction, and the guide member 46 is the rear end portion of the keyboard portion 7. Since the rear end portion of the keyboard lid 40 is guided in the front-rear direction by a guide plate 49 provided between the rear portion of the keyboard portion 7 and the partition plate 30 from above, the keyboard lid 40 is smoothly guided. Can do.

  Also in this case, in the guide rail portion 45 of the lid guide portion 41, the keyboard lid 40 is accommodated in the musical instrument case 1, and the first end of the keyboard lid 40 is located in front of the front end portion of the top plate 6. By providing the shaft restricting portion 45a for restricting the position of the front guide shaft 42 of the keyboard cover 40 in the stored state, when the keyboard cover 40 is stored in the musical instrument case 1 in the first stored state, The position of the front guide shaft 42 of the keyboard lid 40 can be restricted by the shaft restricting portion 45a of the guide rail portion 45, whereby the partition plate 30 is closed in a closed state where the space between the keyboard side space K1 and the speaker side space K2 is closed. Position control can be performed reliably and satisfactorily.

  Further, the operation projection 52 which is an operation member is provided at the rear end portion of the keyboard lid 40, and when the keyboard lid 40 is stored from the first storage state stored in the instrument case 1 to the second storage state. The keyboard cover 40 is stored in the instrument case 1 in the first storage state because the partition 30 is pressed and tilted to open the space between the keyboard side space K1 and the speaker side space K2. In this case, the closed state between the keyboard-side space K1 and the speaker-side space K2 can be reliably maintained by the partition plate 30 only by bringing the operation projection 52 close to or in contact with the partition plate 30.

  The keyboard cover 40 is operated when the keyboard cover 40 is stored in the instrument case 1 in the first storage state and the keyboard cover 40 is further pushed into the instrument case 1 in the second storage state. The protrusion 52 presses the upper end of the partition plate 30 and can be tilted by rotating the partition plate 30 against the spring force of the spring member 32, so that the keyboard side space K1 and the speaker side can be surely and satisfactorily. It can switch to the open state which open | releases between the spaces K2.

(Third embodiment)
Next, a third embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS. Also in this case, the same parts as those in the first embodiment shown in FIGS.
As shown in FIGS. 7 and 8, the electronic keyboard instrument has a configuration in which the speaker 10 is provided on a partition plate 30 that partitions the keyboard side space K1 and the speaker side space K2 in an openable and closable manner. However, the configuration is different from that of the first embodiment. Other than this, the configuration is substantially the same as in the first embodiment.

  In this case, as in the first embodiment, the partition plate 30 is positioned between the keyboard portion 7 and the speaker 10 in the musical instrument case 1 and is moved in the front-rear direction (left-right direction in FIG. 7) by the pair of support shafts 31. It is attached to be rotatable. Thus, the partition plate 30 is configured to open and close between the keyboard side space K1 and the speaker side space K2 by tilting in the front-rear direction about the pair of support shafts 31.

  Further, as in the first embodiment, the partition plate 30 is biased toward a position where the keyboard side space K1 and the speaker side space K2 are partitioned and closed by the spring force of the spring member 32. In this case, a position restricting portion 34 that restricts the rotational position of the partition plate 30 is provided on the lower surface of the top plate 6 in the musical instrument case 1. When the partition plate 30 is in a state in which the partition side 30 partitions and closes the keyboard side space K1 and the speaker side space K2, the upper end of the partition plate 30 comes into contact with the position restricting portion 34 to rotate the partition plate 30. It is comprised so that a position may be regulated.

  Further, as in the first embodiment, the partition plate 30 has a vertical length substantially the same as the length between the lower surface of the top plate 6 and the upper surface of the bottom plate 2, and the key arrangement of the keyboard unit 7. The length in the direction is substantially the same as the length between the pair of side plates 5. As shown in FIGS. 7 and 8, sound emitting holes 30b are respectively provided on both sides of the partition plate 30, that is, on both sides in the key arrangement direction of the keyboard 7 (the front and back sides of the paper in FIG. 7). ing.

  On the rear surface of the partition plate 30, that is, the rear surface of the partition plate 30 located on the speaker side space K2 side (the right side surface in FIG. 7), the speaker 10 is placed in each sound emitting hole 30b as shown in FIGS. Each is provided correspondingly. Accordingly, the speaker 10 is configured to emit a high-frequency sound from the sound emission hole 30b of the partition plate 30 toward the keyboard-side space K1, and to emit a low-frequency sound into the speaker-side space K2. ing.

  By the way, as shown in FIGS. 7 and 8, the top plate portion 60 of the musical instrument case 1 has a top plate 61 provided on the upper front side of the pair of side plates 5. Thereby, the musical instrument case 1 is configured such that the rear side of the top board 61 is opened. A descending wall 61 a is provided at the lower front end of the top plate 61, and an auxiliary top plate 62 is disposed below the rear portion of the top plate 61. The auxiliary top plate 62 is disposed from the lower side of the top plate 61 to the inner surface of the rear plate 4, and in this state, is attached to the inner surface of the side plate 5 by the mounting bracket 63.

  As shown in FIGS. 7 and 8, the auxiliary ceiling plate 62 is provided with a sound emitting hole 62a. On the auxiliary top plate 62, a sound emitting lid 64 is disposed so as to be openable and closable. The sound emitting lid 64 is formed with substantially the same thickness as the top plate 61, and is formed so that the upper surface thereof is flush with the upper surface of the top plate 61 when disposed on the auxiliary top plate 62. Further, the sound emitting lid 64 has a rear end portion rotatably attached to a rear upper end portion of the rear plate 4 by a hinge 65.

  Accordingly, when the sound emitting lid 64 is disposed on the auxiliary top plate 62 by rotating counterclockwise around the hinge 65 as shown by a two-dot chain line in FIGS. 62 is configured to block the sound emitting hole 62a. Further, as shown by a solid line in FIGS. 7 and 8, the sound emitting lid 64 rotates clockwise about the hinge 65 and is disposed on the auxiliary top plate 62 in an inclined state. The sound emitting hole 62a of the plate 62 is configured to be opened.

  In this case, as shown in FIG. 7 and FIG. 8, the sound emitting lid 64 is configured to be supported by the support device 66 when it is erected and arranged on the auxiliary top plate 62. Yes. The support device 66 includes a support member 67 rotatably attached to a front portion in a metal fitting housing portion 64 a provided on the lower surface of the sound emission lid 64, and a guide holder that guides and holds the lower portion of the support member 67. Part 68.

  As shown in FIGS. 7 and 8, the support member 67 is formed in a round bar shape, and the upper part thereof is bent in the key arrangement direction of the keyboard part 7, and the bent upper part 67 a is a bracket housing part of the sound emission lid 64. A mounting plate 69 is rotatably mounted in 64a. Further, the lower part of the support member 67 is bent in the key arrangement direction of the keyboard part 7, and the bent lower part 67 b is guided by the guide holding part 68.

  As shown in FIGS. 7 and 8, the guide holding portion 68 is formed in a band plate shape, its both end portions are bent in an L shape, and the bent both end portions are placed on the auxiliary top plate 62 on the instrument case 1. It is attached in a state located in the front-rear direction. As a result, the guide holding portion 68 is inserted so that the lower portion 67b of the support member 67 is movable between the guide holding portion 68 and the auxiliary top plate 62, and the lower portion 67b of the inserted support member 67 contacts the front end portion. Thus, the support member 67 is configured to be held upright.

  As a result, as shown by the two-dot chain line in FIGS. 7 and 8, the support device 66 allows the upper portion 67 a of the support member 67 to move the guide holding portion 68 when the sound emitting lid 64 is disposed on the auxiliary top plate 62. With the lower portion 67b of the support member 67 positioned at the rear end portion of the guide holding portion 68, the support member 67 lies sideways, and in this state, the support member 67 and the guide holding portion 68 are released. It is comprised so that it may accommodate in the metal fitting storage part 64a of the sound cover 64. FIG.

  Further, as shown by solid lines in FIG. 7 and FIG. 8, the support device 66 has a support member centered on the upper portion 67 a of the support member 67 when the sound emitting lid 64 is pushed up above the auxiliary top plate 62 to stand up. While rotating 67, the lower portion 67 b of the support member 67 moves from the rear side toward the front side along the guide holding portion 68, and the lower portion 67 b of the moved support member 67 moves to the front end portion of the guide holding portion 68. By abutting, the support member 67 is held in an upright state, and the support member 67 is configured to support the sound emitting lid 64 by tilting upward on the auxiliary top plate 62.

Next, the operation of such an electronic keyboard instrument will be described.
When playing with this electronic keyboard instrument, the sound emitting lid 64 is previously disposed on the auxiliary top plate 62 to close the sound emitting hole 62 a of the auxiliary top plate 62. In this state, as in the first embodiment, the keyboard lid 13 is opened and the keyboard unit 7 is opened upward.

  Then, when the front lid 15 is disposed below the top plate 6 of the musical instrument case 1 and the position of the guide shaft 15a of the front lid 15 is regulated by the shaft regulating portion 37 of the guide rail portion 18, as shown in FIG. Further, the keyboard lid 13 is stored in the instrument case 1 in the first storage state, and the keyboard portion 7 is exposed to the upper side of the instrument case 1 in the first exposure state.

  At this time, the operation projection 35 of the front lid 15 approaches or contacts the partition plate 30. For this reason, since the partition plate 30 is not pressed by the operation projection part 35, the partition plate 30 does not tilt, and a closed state in which the space between the keyboard side space K1 and the speaker side space K2 is closed by the spring force of the spring member 32. maintain. Thereby, the speaker side space K2 is formed in the musical instrument case 1 as an acoustic space.

  In this state, the keyboard portion 7 is opened upward and the plurality of keys 9 are exposed upward, so that a performance is possible. In this state, when a plurality of keys 9 of the keyboard unit 7 exposed from the front side of the musical instrument case 1 are pressed and played, the speaker 10 generates a musical tone having a pitch corresponding to the key pressing operation. .

  Of the musical sounds generated by the speaker 10, high-side sounds are emitted from the sound emission holes 30b of the partition plate 30 into the keyboard-side space K1 in the instrument case 1, and are emitted into the keyboard-side space K1. Sound is emitted toward the front side of the musical instrument case 1. Further, the low-frequency sound is emitted into the speaker-side space K2. At this time, since the sound emitting hole 62a of the auxiliary top plate 62 is closed by the sound emitting lid 64 and the speaker side space K2 is an acoustic space by the partition plate 30, the sound quality is enhanced in the speaker side space K2. .

  In this state, when the sound emission lid 64 is opened and the sound emission hole 62a of the auxiliary top plate 62 is opened, the high-frequency sound is transmitted from the sound emission hole 30b of the partition plate 30 to the keyboard side space in the instrument case 1. The sound is emitted toward the front side of the musical instrument case 1 through K 1, but the low-frequency sound is emitted from the sound emitting hole 62 a of the auxiliary top plate 62 to the upper side of the musical instrument case 1 and is emitted from the sound emitting lid 64 to the musical instrument case 1. It is echoed toward the front side. As a result, the sound quality becomes flat and the sound quality can be changed.

  On the other hand, in the case where the sound quality of the sound generated by the speaker 10 is changed in a state where the sound emitting lid 64 is arranged on the auxiliary top plate 62 and the sound emitting hole 62a of the auxiliary top plate 62 is closed, as shown in FIG. Further, the front lid 15 of the keyboard lid 13 in the first storage state is further pushed into the musical instrument case 1 so that the front end of the front lid 15 is positioned behind the front end of the top plate 6. At this time, the guide shaft 15a of the front lid 15 gets over the shaft restricting portion 37 of the guide rail portion 18, and the rear lid 16 further rotates around the hinge 17 to be in the second storage state inclined rearward. Is exposed on the upper side of the musical instrument case 1 in the second exposed state.

  Further, at this time, as shown in FIG. 8, the operation projection 35 provided at the rear end portion of the front lid 15 presses the upper end portion of the partition plate 30, so that the partition plate 30 is made into the spring force of the spring member 32. Rotate and tilt. As a result, the partition plate 30 is tilted obliquely toward the rear, thereby switching to an open state in which the space between the keyboard side space K1 and the speaker side space K2 is open.

  Thereby, as in the first embodiment, the first sound emission path 38a is formed between the upper end portion of the partition plate 30 and the lower surface of the auxiliary top plate 62, and the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3 A second sound emission path 38b is formed between the two. At this time, since the partition plate 30 rotates about the pair of support shafts 31 against the spring force of the spring member 32 and tilts backward, the speaker 10 provided on the partition plate 30 faces obliquely upward. Will be tilted.

  In this state, when a plurality of keys 9 of the keyboard unit 7 exposed from the front side of the musical instrument case 1 are pressed and played, the speaker 10 generates a musical tone having a pitch corresponding to the key pressing operation. . Of the musical sounds generated by the speaker 10, the high-side sound is emitted diagonally upward into the keyboard-side space K <b> 1 from the sound emission hole 30 b of the partition plate 30, and this emitted sound is emitted from the musical instrument case 1. The sound is emitted toward the front side.

  Further, the low-frequency sound is emitted into the speaker-side space K2 of the musical instrument case 1. Since the sound emission hole 62a of the auxiliary top plate 62 is closed by the sound emission cover 64, the low-frequency sound emitted in the speaker-side space K2 has the first sound emission path 38a and the second sound emission. Sound is emitted toward the front side of the musical instrument case 1 through the path 38b. Therefore, the sound quality changes to a flat sound quality.

  That is, the first sound emission path 38 a is formed between the gap formed between the upper end portion of the partition plate 30 and the lower surface of the auxiliary top plate 62, and the upper surface of the front lid 15 and the lower surface of the top plate 6. Due to this gap, the sound in the speaker side space K2 is emitted from the upper side in the musical instrument case 1 toward the front side of the musical instrument case 1 by being formed on the upper side of the keyboard lid 13.

  Further, the second sound emission path 38 b is formed in the instrument case 1 by a gap formed between the lower end portion of the partition plate 30 and the upper surface of the bottom plate 3 and each gap of the plurality of keys 9 of the keyboard portion 7. By being formed on the lower side, the sound in the speaker-side space K2 is emitted from the lower side in the instrument case 1 toward the front side of the instrument case 1. As a result, the sound quality in the speaker-side space K2 changes to a flat sound quality and is emitted.

  In this state, when the sound emission lid 64 is opened and the sound emission hole 62a of the auxiliary top plate 62 is opened, the high-frequency sound is transmitted from the sound emission hole 30b of the partition plate 30 to the keyboard side space in the instrument case 1. Sound is emitted toward the front side of the musical instrument case 1 through K1. Further, the low-pitched sound is emitted toward the front side of the musical instrument case 1 through the first sound emission path 38 a and the second sound emission path 38 b, and from the sound emission hole 62 a of the auxiliary top plate 62. The sound is emitted to the upper side of 1 and reverberated toward the front side of the musical instrument case 1 by the sound emission lid 64. As a result, the sound quality is further flattened, and the sound quality can be further changed.

  Thus, according to the electronic keyboard instrument, as in the first embodiment, the partition plate 30 opens and closes the keyboard-side space K1 and the speaker-side space K2 simply by changing the opening position of the keyboard lid 13. Therefore, when the keyboard-side space K1 and the speaker-side space K2 are partitioned and closed by the partition plate 30, the speaker-side space K2 is formed as an acoustic space in the musical instrument case 1 to improve sound quality. In addition, when the space between the keyboard side space K1 and the speaker side space K2 is opened by the partition plate 30, the first and second sound emission paths 38a and 38b are formed in the musical instrument case 1, and the speaker side Since the sound in the space K2 can be emitted toward the front side of the musical instrument case 1, the sound quality can be easily changed.

  In this case, the speaker 10 is attached to the partition plate 30, so that when the partition plate 30 partitions and closes the keyboard side space K <b> 1 and the speaker side space K <b> 2, The high-pitched sound can be emitted from the sound emission hole 30b of the partition plate 30 toward the front side of the musical instrument case 1. In addition, when the partition plate 30 opens the space between the keyboard side space K1 and the speaker side space K2, the speaker 10 is tilted upward together with the partition plate 30. Can be emitted toward the upper front side of the musical instrument case 1, whereby the direction of the sound by the speaker 10 can be changed.

  Further, this electronic keyboard instrument has a structure in which a sound emitting hole 62a is provided in the auxiliary top plate 62 of the top plate portion 60 of the musical instrument case 1 and a sound emitting lid 64 is provided on the auxiliary top plate 62 so as to be openable and closable. Therefore, even when the partition plate 30 partitions and closes the keyboard side space K1 and the speaker side space K2, or when the partition plate 30 opens the keyboard side space K1 and the speaker side space K2. The sound emission cover 64 can be opened to open the sound emission hole 62a of the auxiliary top plate 62, so that the sound quality can be freely changed regardless of the open position of the keyboard cover 13.

  That is, in this electronic keyboard instrument, when the partition side 30 partitions and closes the keyboard side space K1 and the speaker side space K2, the sound output hole 62a of the auxiliary top plate 62 is closed by the sound output lid 64. As in the first embodiment, the speaker-side space K2 can be formed as an acoustic space, which can improve the sound quality.

  Further, in this electronic keyboard instrument, with the partition plate 30 partitioning and closing the keyboard side space K1 and the speaker side space K2, the sound emission lid 64 is opened and the sound emission hole 62a of the auxiliary top plate 62 is opened. As a result, the sound on the low sound side can be emitted from the sound emitting hole 62a of the auxiliary top plate 62, and the sound quality can be changed to a flat sound quality.

  Furthermore, in this electronic keyboard instrument, when the partition plate 30 opens the space between the keyboard side space K1 and the speaker side space K2, the sound output hole 62a of the auxiliary top plate 62 is closed by the sound output cover 64. Similar to the embodiment, it is possible to emit the low-frequency sound through the first and second sound emission paths 38a and 38b, thereby changing the sound quality to a flat sound quality.

  Further, in this electronic keyboard instrument, when the partition plate 30 opens the space between the keyboard side space K1 and the speaker side space K2, the sound emission cover 64 is opened and the sound emission hole 62a of the auxiliary top plate 62 is opened. In addition to emitting the low-side sound through the first and second sound emission paths 38a and 38b, the sound can be emitted from the sound emission hole 62a of the auxiliary top plate 62, thereby further flattening the sound quality. Can be changed to

  In the above-described third embodiment, the case where the keyboard lid 13 is applied to the electronic keyboard instrument of the first embodiment in which the front lid 15 and the rear lid 16 are connected by the hinge 17 has been described. For example, the present invention can be applied to the electronic keyboard instrument of the second embodiment in which the keyboard lid 40 is formed of a single plate. Also in this case, the speaker 10 is provided on the partition plate 30 that partitions the keyboard side space K1 and the speaker side space K2, and the top plate 6 of the musical instrument case 1 has the same configuration as the top plate portion 60 of the third embodiment. Just do it.

  That is, as in the third embodiment, the partition plate 30 forms the speaker side space K2 as an acoustic space when closed between the keyboard side space K1 and the speaker side space K2, and the keyboard side space K1. And the speaker-side space K2 in an open state, the first sound emission path 53a is formed between the upper end of the partition plate 30 and the lower surface of the top plate 6, and the lower end of the partition plate 30 What is necessary is just to comprise so that the 2nd sound emission path 53b may be formed between the upper surface of the board and the baseplate 3. FIG.

  Similarly to the third embodiment, sound emitting holes 30b are provided on both sides of the partition plate 30, that is, both sides of the keyboard portion 7 in the key arrangement direction, and the rear surface of the partition plate 30, that is, the speaker side. Speakers 10 are provided on the rear surface of the partition plate 30 located on the space K2 side so as to correspond to the sound emission holes 30b. Thereby, the speaker 10 is configured such that the high-frequency sound is emitted from the sound emission hole 30b of the partition plate 30 toward the keyboard-side space K1, and the low-frequency sound is emitted into the speaker-side space K2. Just do it.

  In addition, as in the third embodiment, the top plate portion of the musical instrument case 1 is provided with a top plate 61 on the upper front side of the pair of side plates 5, and an auxiliary top plate 62 is provided below the top plate 61. The auxiliary top plate 62 may be attached to the inner surface of the side plate 5 with the mounting bracket 63 in this state. The auxiliary top plate 62 may be provided with a sound emitting hole 62a, and a sound emitting lid 64 may be disposed on the auxiliary top plate 62 so as to be openable and closable.

  That is, the sound output lid 64 is also attached to the rear upper end of the rear plate 4 so as to be rotatable by a hinge 65 as in the third embodiment. Thereby, the sound emitting lid 64 may be configured to close the sound emitting hole 62a of the auxiliary top plate 62 when it is arranged on the auxiliary top plate 62 by rotating counterclockwise around the hinge 65. . Further, when the sound emitting lid 64 is disposed in a state of being inclined on the auxiliary top plate 62 by rotating clockwise around the hinge 65, the sound emitting hole 62a of the auxiliary top plate 62 is opened. What is necessary is just to comprise.

  Also in this case, the sound emitting lid 64 may be configured to be supported by the support device 66 when it is disposed on the auxiliary top plate 62 in an inclined state. The support device 66 includes a support member 67 rotatably attached to a front portion in a metal fitting housing portion 64 a provided on the lower surface of the sound emission lid 64, and a guide holder that guides and holds the lower portion of the support member 67. What is necessary is just to provide the part 68. FIG.

  Thereby, as in the third embodiment, when the sound emitting lid 64 is disposed on the auxiliary top plate 62, the support device 66 has the upper portion 67 a of the support member 67 positioned on the front side of the front end portion of the guide holding portion 68. In the state where the lower portion 67b of the support member 67 is positioned at the rear end portion of the guide holding portion 68, the support member 67 lies sideways, and in this state, the support member 67 and the guide holding portion 68 are connected to the bracket housing portion of the sound emission lid 64. What is necessary is just to be comprised so that it may be accommodated in 64a.

  Further, as in the third embodiment, when the support member 67 rotates around the upper portion 67a of the support member 67 when the sound emitting lid 64 is pushed up on the auxiliary top plate 62 to stand up, as in the third embodiment, The lower portion 67b of the support member 67 moves from the rear side toward the front side along the guide holding portion 68, and the lower portion 67b of the moved support member 67 contacts the front end portion of the guide holding portion 68, thereby supporting What is necessary is just to be comprised so that the sound emission lid | cover 64 may be inclined and hold | maintained on the auxiliary top plate 62 in the state which raised the member 67. As shown in FIG.

  Thus, in the electronic keyboard instrument in which the third embodiment is applied to the second embodiment in which the keyboard cover 40 is formed of a single plate, the partition plate 30 that partitions the keyboard side space K1 and the speaker side space K2 is provided. Even if the partition plate 30 is provided with the speaker 10 and the top plate 6 of the musical instrument case 1 is configured in the same top plate portion 60 as in the third embodiment, the same operation as in the second and third embodiments is performed. Has an effect.

  In the first to third embodiments described above and the modifications thereof, the speaker 10 is disposed downward or forward in the musical instrument case 1. However, the present invention is not limited thereto, and the speaker is disposed in the musical instrument case 1. 10 may be arranged upward or rearward.

  In the first to third embodiments described above and the modifications thereof, the partition plate 30 is directed toward a position where the keyboard side space K1 and the speaker side space K2 are closed by the spring force of the spring member 32 such as a torsion coil spring. However, the present invention is not limited to this, but is directed to a position where the space between the keyboard side space K1 and the speaker side space K2 is blocked by a biasing member such as a leaf spring, a coil spring, or a rubber string. The partition plate 30 may be configured to be urged, and the urging member is provided with a weight at a lower portion of the partition plate 30, and the weight of the weight causes a space between the keyboard side space K1 and the speaker side space K2. The partition plate 30 may be biased toward the closing position.

  In each of the first to third embodiments described above and the modifications thereof, the top plate 6 has the position restricting portion 34 that restricts the position of the partition plate 3 at a position that closes the space between the keyboard side space K1 and the speaker side space K2. However, the present invention is not limited to this. For example, it may be provided on the upper surface of the bottom plate 2 of the instrument case or the inner surfaces of the pair of side plates 5.

  In the first to third embodiments described above and the modifications thereof, the operation projections 35 and 52 are provided on the front lid 15 or the keyboard lid 40 of the keyboard lid 13, and the operation projections 35 and 52 are used as partition plates. However, the present invention is not limited to this. For example, an operation protrusion is provided on the partition plate 30 and the operation cover is pressed by the keyboard lid to tilt the partition plate 30. You may comprise as follows. For example, the operation protrusions may be provided on the front cover 15 of the keyboard cover 13 or both of the keyboard cover 40 and the partition plate 30.

  Furthermore, in each of the first to third embodiments and the modifications thereof described above, the case where the keyboard lids 13 and 40 are configured to be slidable on the musical instrument case 1 is described. A lid may be rotatably attached to the musical instrument case, and the keyboard portion 7 may be opened and closed by rotating the keyboard lid.

As mentioned above, although several embodiment of this invention was described, this invention is not restricted to these, 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, there is provided a musical instrument case having a front portion opened upward, a keyboard portion disposed in the musical instrument case and exposed to the upper front portion of the musical instrument case, and a rear portion of the keyboard portion. A speaker disposed in the instrument case, a partition member provided between the keyboard portion and the speaker, and partitioning the instrument case into a keyboard side space and a speaker side space; and the instrument case The keyboard part is covered in a state where it is not stored in the instrument case, and the keyboard part is exposed in a state where it is stored in the instrument case. A keyboard instrument comprising a keyboard lid that is tilted to open and close between the keyboard side space and the speaker side space.

  According to a second aspect of the present invention, in the keyboard instrument according to the first aspect, the keyboard cover is in the stored state, and the first storage state in which the keyboard portion is exposed, and the first storage state further includes the first storage state. A keyboard instrument having a second storage state in which a keyboard lid is stored in the instrument case.

  According to a third aspect of the present invention, in the keyboard instrument according to the second aspect, the partition member is provided so as to be tiltable in the front-rear direction of the instrument case, and the partition member is tilted in the first storage state. The partition member maintains the space between the keyboard side space and the speaker side space in a closed state, while in the second storage state, the partition member is moved along with the opening operation of the keyboard lid. A keyboard instrument characterized by being tilted and switched to an open state in which a space between the keyboard side space and the speaker side space is opened.

  According to a fourth aspect of the present invention, in the keyboard instrument according to the third aspect, a support shaft that rotatably supports the partition member in the musical instrument case in the front-rear direction, the keyboard side space, and the speaker side space. A keyboard instrument comprising a biasing member that biases the partition member toward a position for closing the gap.

  According to a fifth aspect of the present invention, in the keyboard instrument according to any one of the first to fourth aspects, the keyboard lid has a plurality of lid portions that are foldably connected and is slidably provided on the musical instrument case. It is a keyboard instrument characterized by being.

  According to a sixth aspect of the present invention, in the keyboard instrument according to any one of the first to fourth aspects, the keyboard lid is formed of a single flat plate and is slidably provided on the musical instrument case. It is a keyboard instrument characterized by this.

  The invention according to claim 7 is the keyboard instrument according to any one of claims 1 to 6, wherein the speaker is attached to the partition member.

DESCRIPTION OF SYMBOLS 1 Musical instrument case 2 Bottom plate 2a Sound emission hole 5 Side plate 6, 61 Top plate 7 Keyboard part 8 Keyboard chassis 9 Key 10 Speaker 13, 40 Keyboard cover 14, 41 Cover guide part 15 Front cover 15a Guide shaft 16 Rear cover 16a Guide shaft 18 , 45 Guide rail portion 19, 46 Guide member 20 Support shaft 21 Arm portion 22 Connecting shaft 30 Partition plate 30b Sound emitting hole 31 Support shaft 32 Spring member 34 Position restricting portion 35, 52 Operation projection portion 37, 45a Shaft restricting portion 38a, 53a First sound emission path
38b, 53b Second sound emission path 42 Front guide shaft 47 Rear guide shaft 49 Guide plate 60 Top plate portion 62 Auxiliary top plate 62a Sound emission hole 63 Sound emission cover K1 Keyboard side space K2 Speaker side space

Claims (7)

A musical instrument case whose front side is opened upward;
A keyboard part disposed in the instrument case and exposed on the upper front side of the instrument case;
A speaker located behind the keyboard and disposed in the instrument case;
A partition member provided between the keyboard unit and the speaker, and partitioning the instrument case into a keyboard side space and a speaker side space;
It is configured to be storable in the instrument case, covers the keyboard part in a state where it is not stored in the instrument case, and exposes the keyboard part in a state in which it is stored in the instrument case. A keyboard lid that tilts the partition member to open and close between the keyboard side space and the speaker side space;
A keyboard instrument characterized by comprising   2. The keyboard instrument according to claim 1, wherein the keyboard cover is in the storage state in a first storage state in which the keyboard portion is exposed, and the keyboard cover is further moved into the instrument case from the first storage state. A keyboard instrument characterized by having a second storage state stored. The keyboard instrument according to claim 2,
The partition member is provided to be tiltable in the front-rear direction of the instrument case,
In the case of the first storage state, the partition member is not tilted, and the partition member maintains the space between the keyboard side space and the speaker side space in a closed state.
On the other hand, in the second storage state, the partition member is tilted in accordance with the opening operation of the keyboard lid, and is switched to an open state in which the space between the keyboard side space and the speaker side space is opened. Keyboard instrument to play.   4. The keyboard instrument according to claim 3, wherein a support shaft that rotatably supports the partition member in the instrument case in the instrument case, and a position that closes a space between the keyboard side space and the speaker side space. A keyboard instrument comprising an urging member for urging the partition member.   The keyboard instrument according to any one of claims 1 to 4, wherein the keyboard lid is slidably provided on the instrument case, with a plurality of lid portions being foldably connected. Musical instrument.   5. The keyboard instrument according to claim 1, wherein the keyboard cover is formed of a single flat plate and is slidably provided on the instrument case. The keyboard instrument according to any one of claims 1 to 6, wherein the speaker is attached to the partition member.

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