JP5413794B2 - Keyboard instrument - Google Patents

Description

  The present invention relates to a keyboard instrument such as an electronic piano, and more particularly to a keyboard instrument that houses a keyboard lid so as to be freely opened and closed.

2. Description of the Related Art Conventionally, in a keyboard instrument, as described in Patent Document 1, a keyboard lid that covers a keyboard portion disposed in the instrument body so as to be openable and closable is divided into a front lid and a rear lid. There is known a structure in which a lid is connected with a hinge so as to be bent, and the keyboard lid is moved along a guide rail member and stored on the rear side in the instrument body.
JP2007-102045

  That is, when the keyboard instrument is opened by opening the keyboard cover and exposing the keyboard part, when the front cover is lifted and moved toward the rear of the instrument body, the rear cover moves backward along the guide rail member and the hinge is moved. The front lid is folded so that it is gradually bent with respect to the front lid, and the bent rear lid is stood up in a slanted state toward the rear side in the instrument body located behind the keyboard portion. It is configured to be stored in a state substantially parallel to the lower side of the top plate of the instrument body.

  However, in such a conventional keyboard instrument, when the keyboard lid is opened and the keyboard portion is exposed, the front lid is disposed substantially parallel to the lower side of the top plate, and the rear lid is arranged at the rear portion in the instrument body. Therefore, it is necessary to provide a large space for storing the keyboard lid in the instrument main body located behind the keyboard portion. Furthermore, when mounting components such as operation switches, speakers, circuit boards, music rests, etc. on the instrument body located behind this, there is a problem that the instrument body is enlarged.

  The problem to be solved by the present invention is to provide a keyboard instrument in which the keyboard lid is housed in the lower part of the instrument body so that the entire instrument can be miniaturized.

In order to solve the above problems, the present invention includes the following components.
According to the first aspect of the present invention, the musical instrument main body in which the keyboard portion is disposed, the front lid that covers the front end side of the keyboard portion, and the rear lid that covers the upper side of the keyboard portion can be bent at the bending connecting portion. And a lid opening / closing mechanism for movably storing the keyboard lid on the lower side of the instrument body , wherein the lid opening / closing mechanism has a lower front end of the front lid at the keyboard. A pivot support part that pivotably supports the front lower part of the instrument body corresponding to the lower front end of the part, and when the keyboard cover is opened to expose the keyboard part, the pivot support part is the center. The front lid is rotated and moved to the lower front side of the musical instrument main body, and the rear lid is bent with respect to the front lid around the bent connecting portion and moved to the lower rear side of the musical instrument main body. It is a keyboard instrument characterized by this.

  According to this invention, the keyboard lid in which the front lid that covers the front end side of the keyboard portion and the rear lid that covers the upper side of the keyboard portion are flexibly connected by the bending connecting portion is attached to the lower side of the instrument body by the lid opening / closing mechanism. It can be stored movably. For this reason, there is no need to provide a space for storing the keyboard lid in the instrument body located on the rear side of the keyboard, so components such as operation switches, speakers, circuit boards, and music rests are mounted on the rear side of the keyboard. However, the depth of the instrument body does not increase, and the entire instrument can be sufficiently downsized.

(Embodiment 1)
A first embodiment of a keyboard instrument to which the present invention is applied will be described below with reference to FIGS.
The keyboard musical instrument 1 includes a musical instrument main body 1 as shown in FIGS. The musical instrument body 1 has a pair of side plates 2 (only one side is shown in FIG. 2) attached to the left and right sides thereof, and is supported on the upper side of the pair of side plates 2 to form a wide space below the pair. It is configured.

As shown in FIGS. 2 and 3, the instrument main body 1 is provided with a keyboard chassis 3 and a keyboard portion 4 disposed on the keyboard chassis 3. The keyboard unit 4 includes a large number of keys 4 a made up of white keys and black keys arranged on the keyboard chassis 3, and the rear ends of these keys 4 a are rotatably attached to the rear ends of the keyboard chassis 3. In this state, the front side of each key 4a is configured to rotate up and down by a key pressing operation.

Further, as shown in FIGS. 2 and 3, a cover case 5 is provided on the rear upper part of the musical instrument body 1 from the upper rear part of the keyboard part 4 to the lower rear part of the keyboard part 4. As shown in FIGS. 1 and 3, an operation switch section 6 having a plurality of switches for selecting and specifying various functions such as volume and tone color is provided on the upper front side of the cover case 5.

As shown in FIG. 3, circuit boards 7 and 8 are provided below the operation switch unit 6 so as to be located on the upper rear side of the keyboard unit 4. Further, as shown in FIG. 1, speakers 10 are respectively provided inside both sides of the lower side of the cover case 5 located behind the keyboard portion 4. Further, as shown in FIG. 2 and FIG. 3, a music stand 11 is provided on the rear upper portion of the cover case 5 so as to stand upright in an inclined state toward the upper rear side.

By the way, as shown in FIG. 3, the musical instrument main body 1 is provided with a keyboard lid 12 that covers the keyboard portion 4 so as to be opened and closed. The keyboard lid 12 includes a front lid 13 that covers the front end side of the keyboard portion 4, a rear lid 14 that covers the upper side of the keyboard portion 4, and a bent connecting portion that flexibly connects the front lid 13 and the rear lid 14. 15. In addition, as shown in FIG. 3, the keyboard lid 12 includes a pair of portions where the lower end portion of the front lid 13 is located at the front lower portion of the instrument body 1 corresponding to the lower front end portion of the keyboard portion 4 by the rotation support portion 16. Each side plate 2 is rotatably supported.

As shown in FIGS. 3 and 7, the rotation support portion 16 is a lid opening / closing mechanism for movably storing the keyboard lid 12 on the lower side of the musical instrument main body 1 located below the keyboard chassis 3. As shown in FIGS. 3 to 5, it is provided on both side surfaces (only one side is shown in FIGS. 3 to 5) of the lower end portion of the front lid 13 so as to protrude toward the side plate 2 facing this. A support shaft 17 and a bearing portion 18 provided on the side plate 2 of the musical instrument main body 1 located at the lower front end of the keyboard portion 4 and rotatably supporting the support shaft 17 are provided.

In this case, the side plate 2 of the musical instrument main body 1 located on the rear upper side of the keyboard portion 4 is attached to the rear lid 14 when the keyboard lid 12 is closed and the keyboard portion 4 is covered as shown in FIGS. An upper stopper member 19 is provided in the provided stopper hole 14a so as to be releasably engaged from below. As shown in FIG. 6, the upper stopper member 19 is attached to the side plate 2 positioned on the upper rear side of the keyboard portion 4 and attached to the instrument body 1 along the upper side of the keyboard portion 4. The mounting plate 19a is provided with an engaging pin 19b that protrudes upward from the mounting plate 19a and engages with the stopper hole 14a of the rear lid 14 so as to be detachable from below.

Further, as shown in FIGS. 3 and 7, the side plate 2 of the musical instrument main body 1 located below the rear portion of the keyboard chassis 3 has a rear cover 14 when the keyboard cover 12 is opened and the keyboard section 4 is exposed. A lower stopper member 20 is provided in the stopper hole 14a provided in the upper portion of the stopper hole 14a so as to be detachably engaged from above. The lower stopper member 20 is also attached to the side plate 2 located on the lower rear side of the keyboard chassis 3, and is attached to the mounting plate 20a projecting into the musical instrument body 1 along the lower side of the keyboard chassis 3. An engaging pin 20b that protrudes downward and is attached to the stopper hole 14a of the rear lid 14 so as to be detachable from above is provided (see FIG. 6).

In such a keyboard instrument, as shown in FIG. 3, when the keyboard lid 12 covers and closes the keyboard portion 4, the lower end portion of the front lid 13 corresponds to the lower front end portion of the keyboard portion 4 by the rotation support portion 16. When the keyboard cover 12 is closed and the keyboard part 4 is covered in this state, the front cover 13 is positioned on the front end side of the keyboard part 4 and the rear cover 14 is It bends at a substantially right angle at the bending connection part 15 and is located on the upper side of the keyboard part 4 (state A in FIG. 7). At this time, the engagement pin 19 b of the upper stopper member 19 is engaged with the stopper hole 14 a of the rear lid 14 to fix the keyboard lid 12 to the instrument body 1.

When the keyboard cover 12 is opened to expose the keyboard portion 4, first, the engagement pin 19 b of the upper stopper member 19 is relatively disengaged from the stopper hole 14 a of the rear cover 14 to open and close the keyboard cover 12. Ready to operate. In this state, as shown in FIG. 7, the front lid 13 is rotated to the front side (counterclockwise in FIG. 7) around the rotation support portion 16 to the front side (left side in FIG. 7) of the instrument body 1. (B state in FIG. 7). In this state, the front lid 13 is tilted upward and obliquely upward, and the rear lid 14 is erected in a state of being slightly inclined rearward with respect to the front lid 13.

In this state, the front lid 13 is further rotated around the rotation support portion 16 so that the front lid 13 is tilted forward and downward obliquely downward (state C in FIG. 7). At this time, as shown from the B state to the C state in FIG. 7, the rear lid 14 is rotated by approximately 180 ° from the upper side to the lower side at the bent connecting portion 15, and the rear lid 14 is moved to the lower side of the front lid 13. Move to. Thereafter, the front lid 13 is further rotated around the rotation support portion 16, the front lid 13 is suspended below the rotation support portion 16, and the rear lid 14 is moved from the lower end portion of the front lid 13 to the musical instrument. It moves toward the lower side of the main body 1 (D state in FIG. 7).

Then, while further rotating the front lid 13 around the rotation support portion 16, the rear lid 14 is moved to a substantially horizontal state on the lower side of the instrument body 1 located below the keyboard chassis 3 (FIG. 7). E state). As a result, the front lid 13 is disposed at the lower front portion of the instrument body 1 and the rear lid 14 is disposed at the lower rear portion of the instrument body 1. In this state, the engaging pin 20 b of the lower stopper member 20 is engaged with the stopper hole 14 a of the rear lid 14. Thereby, the keyboard part 12 is housed and fixed on the lower side of the instrument body 1.

Thus, according to this keyboard instrument, the front lid 13 that covers the front end side of the keyboard portion 4 disposed in the instrument body 1 and the rear lid 14 that covers the upper side of the keyboard portion 4 are bent by the bending connecting portion 15. The freely connected keyboard lid 12 can be movably accommodated on the lower side of the musical instrument main body 1 located below the keyboard portion 4 by a rotation support portion 16 that is a lid opening / closing mechanism. For this reason, there is no need to provide a space for storing the keyboard lid 12 in the instrument body 1 located on the rear side of the keyboard section 4, so that the operation switch 6, speaker 10, circuit boards 7, 8 are disposed on the rear side of the keyboard section 4. Even if components such as the music stand 11 are mounted, the depth of the musical instrument main body 1 does not increase, and the entire musical instrument can be sufficiently downsized.

In this case, the rotation support portion 16 which is a lid opening / closing mechanism supports the front lower portion of the front lid 13 rotatably on the front lower portion of the side plate 2 of the instrument body 1 corresponding to the lower front end of the keyboard portion 4. The front lid 13 is rotated around the rotation support portion 16 and moved to the lower part of the front side of the musical instrument main body 1, and the rear lid 14 is bent with respect to the front lid 13 around the bending connection portion 15. It is possible to move the musical instrument main body 1 to the lower rear side while arranging it. Therefore, the opening / closing operation of the keyboard lid 12 is simple, and the keyboard lid 12 can be easily stored in the lower part of the musical instrument main body 1.

Further, the rotation support portion 16 is provided on both sides of the lower portion of the front lid 13 so as to protrude toward the side thereof, and on the lower portion on the front side of the instrument main body 1 located at the lower front end of the keyboard portion 4. Since the structure includes a bearing portion 18 that rotatably supports the support shaft 17, the structure is simple, and the front lid 13 is attached to the bearing portion 18 provided in the instrument body 1. The keyboard lid 12 can be easily attached to the instrument body 1 simply by inserting the support shaft 17. For this reason, the attachment structure of the keyboard lid 12 is simple, the assembling work can be facilitated, and a product with good productivity can be provided.

Further, in this keyboard instrument, an upper stopper member 19 is provided on the side plate 2 of the musical instrument main body 1 at a position above the rear part of the keyboard part 4 so as to detachably engage the stopper hole 14a of the rear cover 14. Therefore, when the keyboard lid 12 is closed and the keyboard portion 4 is covered, the keyboard lid 12 is securely fixed to the instrument body 1 by engaging the stopper hole 14a of the rear lid 14 with the upper stopper member 19. As a result, the keyboard lid 12 does not open without permission, and a highly safe one can be obtained.

Further, in this keyboard instrument, a lower stopper member 20 is provided on the side plate 2 of the musical instrument main body 1 at a position below the rear part of the keyboard part 4 for releasably locking the stopper hole 14a of the rear lid 14. Therefore, when the keyboard cover 12 is opened and stored in the lower part of the instrument body 1, the stopper cover 14 a of the rear cover 14 is locked by the lower stopper member 20, so that the keyboard cover 12 is attached to the instrument body 1. Since the keyboard cover 12 does not detach from the lower side of the musical instrument main body 1 without permission, it is possible to obtain a highly safe one.

(Embodiment 2)
Next, a keyboard instrument according to a second embodiment to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
As shown in FIG. 8, the keyboard instrument has a configuration in which a guide rail member 25 is provided on the lower side of the instrument body 1, and the keyboard lid 26 is guided by the guide rail member 25 to be stored on the lower side of the instrument body 1. Except this, the configuration is almost the same as in the first embodiment.

In this case, as shown in FIG. 8, the keyboard lid 26 is formed in a shape in which the front lid 27 and the rear lid 28 are gently curved with the same curvature, and can be bent freely by the bending connecting portion 15 as in the first embodiment. It has a connected structure. Further, as shown in FIGS. 8 and 9, a guide shaft 29 guided by a guide rail member 25 is directed from the side surface of the front lid 27 toward the side plate 2 facing the front lid 27. Projecting.

As shown in FIG. 9, the guide rail member 25 includes a guide groove 25a for guiding a guide shaft 29 provided at a lower front end of the front lid 27, and a side edge portion and a rear portion of the front lid 27 as shown in FIG. And a guide support portion 25b that slidably supports and guides the side edge of the lid 28. As shown in FIG. 8, the instrument main body 1 is directed obliquely downward from the front lower portion to the rear lower portion. It is inclined to the rear lower part (lower right part in FIG. 8).

That is, as shown in FIGS. 8, 11, and 12, the guide rail member 25 has a front end portion (left end portion in FIG. 8) positioned at a lower front end of the keyboard chassis 3 and a rear end portion (see FIG. 8). 8 is located on the lower side of the rear portion of the keyboard chassis 3, and the rear end portion is provided at a position lower than the front end portion, so that it is inclined obliquely downward toward the rear side. .

Further, as shown in FIGS. 8, 11, and 12, the guide rail member 25 is gently curved from the front side to the rear side with the same curvature as the curved shapes of the front lid 27 and the rear lid 28. In the state, it is arranged so as to incline toward the rear part. Further, as shown in FIGS. 8, 11, and 12, a stopper portion 25 c with which the guide shaft 27 abuts is provided at the rear end portion of the guide rail member 25.

Also in this case, the side plate 2 of the musical instrument main body 1 located above the rear part of the keyboard part 4 has a rear cover when the keyboard part 26 is closed and the keyboard part 4 is covered as shown in FIGS. An upper stopper member 19 is provided for locking the stopper hole 28a provided in 28 so as to be disengageable from below. Similarly to the first embodiment, the upper stopper member 19 is also attached to the side plate 2 located on the upper rear side of the keyboard portion 4, and the mounting plate 19 a that protrudes toward the instrument body 1 along the upper side of the keyboard portion 4. An engagement pin 19b is provided that protrudes upward from the attachment plate 19a and engages with the stopper hole 28a of the rear lid 28 from below.

In such a keyboard musical instrument, as shown in FIG. 8, when the keyboard lid 26 covers and closes the keyboard portion 4, the guide shaft 29 provided at the lower end portion of the front lid 27 serves as the guide groove of the guide rail member 25. In this state, the front lid 27 covers the front end portion of the keyboard portion 4, and the rear lid 28 is bent at a substantially right angle by the bent connecting portion 15 to cover the upper side of the keyboard portion 4. At this time, the engagement pin 19 b of the upper stopper member 19 is engaged with the stopper hole 28 a of the rear lid 28, and the keyboard lid 26 is fixed to the instrument body 1.

When the keyboard lid 26 is opened to expose the keyboard portion 4, the engagement pin 19b of the upper stopper member 19 is relatively detached from the stopper hole 28a of the rear lid 28 as shown in the state A of FIG. As a result, the keyboard lid 26 can be opened and closed. In this state, the guide shaft 29 provided at the lower end of the front lid 27 is moved along the guide groove 25a of the guide rail member 25 toward the lower rear of the musical instrument main body 1. Then, as shown in state A in FIG. 11, the front lid 27 is inclined toward the front of the keyboard portion 4 (leftward in the same figure), and the rear lid 28 is moved toward the upper front side of the keyboard portion 4. While tilting up the rear.

Then, when the guide shaft 29 provided at the lower end portion of the front lid 27 further moves toward the lower rear of the musical instrument main body 1 along the guide groove 25a of the guide rail member 25, as shown in FIG. Since the side edge portion of the guide rail member 25 is slidably disposed on the guide support portion 25 b of the guide rail member 25, the front lid 27 is inclined forward of the keyboard portion 4 and is positioned on the curvature extension of the guide rail member 25. At this time, the rear lid 28 is turned upward about the bent connecting portion 15 to stand in a substantially vertical state (state B in FIG. 11).

In this state, the guide shaft 29 provided at the lower end of the front lid 27 moves further along the guide groove 25a of the guide rail member 25 toward the lower rear side of the musical instrument main body 1, and the side edge of the front lid 27 When the portion slides on the guide support portion 25b of the guide rail member 25, the bent connecting portion 15 approaches the guide groove 25a of the guide rail member 25 and corresponds to the side edge of the rear lid 28 as shown in FIG. The portion is slidably disposed on the guide support portion 25 b of the guide rail member 25. Accordingly, the rear lid 28 is positioned on the curvature extension of the guide rail member 25.

Thereafter, when the guide shaft 29 provided at the lower end portion of the front lid 27 moves to the rear end portion of the guide groove 25a of the guide rail member 25, the guide shaft 29 becomes a stopper portion of the guide groove 25a as shown in FIG. The movement of the guide shaft 29 is stopped in contact with 25c. At this time, both the side edge portion of the front lid 27 and the side edge portion of the rear lid 28 are disposed and supported on the guide support portion 25b of the guide rail member 25, so that the keyboard lid 26 is located below the instrument body 1. It is stored in a stable state on the side.

Thus, according to this keyboard instrument, the front lid 27 covering the front end side of the keyboard portion 4 disposed in the instrument body 1 and the rear lid 28 covering the upper side of the keyboard portion 4 are bent at the bending connecting portion 15. The freely connected keyboard lid 26 can be moved to the lower side of the musical instrument main body 1 by a lid opening / closing mechanism having a guide shaft 29 provided at the lower front end of the front lid 27 and a guide rail member 25 for guiding the guide shaft 29. Can be stored. Therefore, as in the first embodiment, there is no need to provide a space for storing the keyboard lid 26 in the instrument main body 1 located on the rear side of the keyboard unit 4, so that the operation switch 6 and the speaker 10 are provided on the rear side of the keyboard unit 4. Even if components such as the circuit boards 7 and 8 and the music stand 11 are mounted, the depth of the musical instrument main body 1 is not increased, and the entire musical instrument can be sufficiently downsized.

In this case, the guide rail member 25 is provided from the front lower portion to the rear lower portion of the musical instrument main body 1, and the guide groove 25 a that guides the guide shaft 29 provided at the lower front end of the front lid 27, and the front lid 27. When the keyboard cover 26 is opened to expose the keyboard portion 4, the guide shaft is provided with the guide support portion 25 b that slidably supports and guides the side edge portion of the rear lid 28 and the side edge portion of the rear lid 28. 29 can be guided by the guide groove 25a of the guide rail member 25, and the side edge portion of the front lid 27 and the side edge portion of the rear lid 28 can be sequentially slid by the guide support portion 25b of the guide rail member 25. The keyboard cover 26 can be stored in a stable state on the lower side of the musical instrument main body 1.

Further, the guide rail member 25 is inclined rearwardly downward from the front side to the rear side of the musical instrument main body 1, so that when the keyboard lid 26 is stored on the lower side of the musical instrument main body 1, Since the weight is applied toward the lower rear side along the inclination of the guide rail member 25, the keyboard lid 26 can be smoothly moved with a light force, whereby the keyboard lid 26 can be easily stored. At the same time, it can be satisfactorily stored in the lower part of the instrument body 1.

Further, since the guide rail member 25 is provided with a stopper portion 25c with which the guide shaft 27 abuts at a position located on the rear side of the musical instrument main body 1, the keyboard lid 26 is accommodated on the lower side of the musical instrument main body 1. At this time, even if the guide shaft 29 is accelerated and moved by the weight of the keyboard lid 26 due to the inclination of the guide rail member 25, the guide shaft 29 can be surely stopped at a predetermined position by the stopper portion 25c. Can be secured.

In the second embodiment, the case where the guide support portion 25b of the guide rail member 25 is configured to slidably support and guide the side edge portion of the front lid 27 and the side edge portion of the rear lid 28 has been described. However, the present invention is not limited to this, and, for example, as in the modified examples shown in FIGS. 13 to 15, guide rollers 31 are provided on the side edges of the front lid 27 and the rear lid 28, respectively. You may comprise so that it may roll on the guide support part 25b of the rail member 25. FIG.

With this configuration, when the keyboard lid 26 is opened to expose the keyboard portion 4, the guide shaft 29 is provided at the side edge portion of the front lid 27 while being guided by the guide groove 25 a of the guide rail member 25. Since the guide roller 31 and the guide roller 31 provided at the side edge of the rear lid 28 roll on the guide support portion 25b of the guide rail member 25, the keyboard lid 26 moves smoothly along the guide rail member 25. Can be made.

In the second embodiment, the case where the guide shaft 29 provided on the front lid 27 is guided by the guide groove 25a of the guide rail member 25 has been described. The shaft 29 may be provided with a pinion gear, and the guide rail member may be provided with a rack gear that meshes with the pinion gear and rolls.

In the first and second embodiments, the case where the keyboard lids 12 and 26 are divided into the front lids 13 and 27 and the rear lids 14 and 28 and are flexibly connected by the bending connecting portion 15 will be described. However, the present invention is not limited thereto, and for example, the front lids 12 and 26 may be divided into a plurality of parts and connected by a bent connecting part, and the rear lids 14 and 28 may be divided into a plurality of parts and connected by a bent connecting part. . If comprised in this way, the flexibility of the whole keyboard cover will improve and storage property can be improved further.

(Embodiment 3)
Next, a third embodiment of a keyboard instrument to which the present invention is applied will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
As shown in FIGS. 16 and 17, the keyboard instrument is divided into a plurality of keyboard lids 35 extending from a position on the upper side of the keyboard part 4 to the lower side of the instrument body 1 through the front side of the keyboard part 4. Is guided by the guide rail member 36, and the other configuration is substantially the same as that of the first embodiment.

In this case, as shown in FIGS. 16 and 17, the keyboard lid 35 divides the front lid 37 and the rear lid 38 into a plurality of lid portions 40, and the plurality of divided lid portions 40 are bent into a plurality of bent portions. The connecting portion 41 is sequentially connected to bend freely. Each of the plurality of bent connecting portions 41 has a shaft portion 41a protruding from each side edge portion of each lid portion 40 toward the side plate 2 side facing the same.

As shown in FIGS. 16 and 17, the guide rail member 36 extends from the rear upper side of the musical instrument main body 1 located on the upper side of the keyboard part 4 to the lower rear side of the musical instrument main body 1 through the front side of the musical instrument main body 1. It is provided continuously and is configured to guide each shaft portion 41a of the plurality of bent connecting portions 41 so as to be movable. In this case, the guide rail member 36 located at the upper side of the keyboard portion 4 is formed in an inclined portion 36a that rises rearward (upward in FIG. 16) that gently rises from the front side toward the rear intermediate portion. At the same time, the flat portion 36b is formed to be substantially horizontal from the rear intermediate portion toward the rear end portion.

Accordingly, as shown in FIG. 16, the guide rail member 36 has a plurality of lid portions positioned on the rear side (right side in FIG. 16) of the rear lid 38 when the keyboard lid 35 covers and closes the keyboard portion 4. By arranging 40 on the flat portion 36b on the rear side, the keyboard lid 35 is held closed by the weight of the plurality of lid portions 40. Although not shown, the guide rail member 36 includes a rack gear provided along the guide rail member 36, and the rack gear meshes with the pinion gears provided on the shaft portions 41a of the plurality of bent connecting portions 41, respectively. It is desirable to be configured to roll.

Further, as shown in FIGS. 16 and 17, the rear end portion located on the lower side of the guide rail member 36, that is, the rear end portion of the guide rail member 36 located on the lower side of the musical instrument main body 1, A spring member 42 is provided to which the end portion 37a (the rear end portion on the right side in FIG. 17) of the lid portion 40 located on the lower side of FIG.

As shown in FIG. 17, the spring member 42 is a lid portion located on the lower side of the front lid 37 (the rear end side on the right side in FIG. 17) when the keyboard lid 35 is housed in the lower part of the instrument body 1. The keyboard cover 35 is pushed and compressed by the end portion 37a of 40, and the keyboard cover 35 is pushed out by the spring force of the compressed spring member 42 when the keyboard cover 35 covers and closes the keyboard part 4.

Therefore, at the front end of the musical instrument main body 1, as shown in FIG. 17, when the keyboard lid 35 is stored on the lower side of the musical instrument main body 1, the keyboard lid 35 is pushed out by the spring force of the spring member 42. A blocking member 43 for blocking is provided. When the keyboard cover 35 is housed on the lower side of the musical instrument main body 1, the lock member 43 is attached to the end 38 a of the lid 40 located at the rearmost portion of the rear cover 38 positioned on the front side of the musical instrument main body 1. The entire keyboard lid 35 is abutted and locked, and when the keyboard lid 35 covers and closes the keyboard portion 4, the lock on the last lid portion 40 is released.

In such a keyboard instrument, as shown in FIG. 16, when the keyboard lid 35 covers and closes the keyboard portion 4, the shaft portions 41 a of the plurality of bent connecting portions 41 corresponding to the front lid 37 are connected to the keyboard portion 4. Are supported by the guide rail member 36 located at the front end of each of the plurality of bent connecting portions 41 corresponding to the rear lid 38 and the shaft portions 41a of the guide rail members 36 located above the keyboard portion 4 are inclined portions 36a. And it is supported by the flat part 36b.

As a result, as shown in FIG. 16, each lid portion 40 of the front lid 27 is arranged in a state substantially perpendicular to the front side of the keyboard portion 4, and each lid portion 40 of the rear lid 38 is arranged on the upper side of the keyboard portion 4. The In this state, the plurality of lid portions 40 located on the rear side of the rear lid 38 are arranged on the rear side flat portion 36b located on the upper side of the guide rail member 36, whereby the plurality of lid portions 40b arranged on the flat portion 36b are arranged. Due to the weight of the lid portion 40, the entire keyboard lid 35 is held in a closed state covering the keyboard portion 4.

Further, when the keyboard cover 35 is opened and the keyboard part 4 is exposed, if each cover part 40 of the front cover 37 is moved downward in the state shown in FIG. 16, the front cover 37 and the rear cover 38 are moved. The shaft portions 41a of all the corresponding bent connection portions 41 are guided by the guide rail members 36, and move from the upper side of the keyboard portion 4 to the lower side of the keyboard chassis 3 through the front side of the keyboard portion 4.

Along with this, each lid portion 40 of the front lid 37 moves to the lower side of the musical instrument main body 1 and each lid portion 40 located on the front side of the rear lid 38 among the lid portions 40 of the rear lid 38. Moves from the upper side of the keyboard part 4 to the lower side of the instrument body 1 through the front side of the keyboard part 4, and each lid part 40 on the rear side of the rear cover 38 moves from the upper side of the keyboard part 4 to the front side of the keyboard part 4. To do.

At this time, when the end portion 37a of the lid portion 40 of the front lid 37 moves to the lower rear portion of the musical instrument main body 1 and elastically contacts the spring member 42, the movement of the entire keyboard lid 35 is stopped. In this state, when the lid 40 at the rearmost part is moved against the spring force of the spring member 42, the lid 40 located at the rearmost part of the rear lid 38 is positioned at the front side of the keyboard part 4. As shown in FIG. 17, the end portion 38 a of the lid portion 40 at the rearmost portion is locked by the lock member 43. At this time, the spring member 42 is pushed and compressed by the end portion 37a of the lid portion 40 of the front lid 37, and the keyboard lid 35 is disposed and stored on the lower side of the instrument body 1 in this state.

As described above, according to this keyboard instrument, the front lid 37 covering the front end side of the keyboard portion 4 disposed in the musical instrument main body 1 and the rear lid 38 covering the upper side of the keyboard portion 4 are each provided with the plurality of lid portions 40. The keyboard lid 35 is configured by being divided into a plurality of flexural connecting portions 41 and sequentially being flexibly connected, and the keyboard lid 35 is connected to the upper side of the instrument body 1 by a lid opening / closing mechanism that is a guide rail member 36. From the front side of the musical instrument main body 1 to the lower side of the musical instrument main body 1 and can be stored from the front side of the musical instrument main body 1 to the lower rear side.

Therefore, as in the first embodiment, there is no need to provide a space for storing the keyboard lid 35 in the instrument main body 1 located on the rear side of the keyboard unit 4, so that an operation switch, a speaker, and a musical score are provided on the rear side of the keyboard unit 4. Even if components such as the circuit board 44 are mounted upright, the depth of the musical instrument main body 1 is not increased, and the entire musical instrument can be sufficiently downsized.

In this case, the guide rail member 36 is provided continuously from the upper rear side of the musical instrument main body 1 located above the keyboard portion 4 through the front end side of the musical instrument main body 1 to the lower rear side of the musical instrument main body 1. Therefore, when the keyboard cover 35 is opened and the keyboard portion 4 is exposed, the shaft portions 41a of the plurality of bent connection portions 41 are guided rail members. 36, each lid portion 40 of the keyboard portion 35 can be sequentially and smoothly moved to the lower side of the instrument body 1, and the keyboard lid 35 is stored in a stable state on the lower side of the instrument body 1. can do.

Further, since the spring member 42 is provided at the rear end portion located below the guide rail member 36, the lid portion of the front lid 37 is opened when the keyboard lid 35 is opened to expose the keyboard portion 4. The end portion 37a of 40 can be elastically contacted with the spring member 42, so that the impact by the keyboard lid 35 can be absorbed, and the spring member 42 is pressed and compressed by the end portion 37a of the lid portion 40 of the front lid 37. Can be made. For this reason, when the keyboard lid 35 covers and closes the keyboard portion 4, the keyboard lid 35 can be pushed out by the spring force of the compressed spring member 42, so even if the keyboard lid 35 is heavy, the keyboard lid 35 can be pushed with a light force. 35 can be moved.

It is a top view of the keyboard musical instrument in Embodiment 1 of the keyboard musical instrument to which this invention is applied. It is sectional drawing in the AA arrow of the keyboard musical instrument of FIG. It is the expanded sectional view which showed the principal part of FIG. It is an enlarged front view of the principal part which showed the rotation support part of FIG. 3 in the cross section. The bearing part of FIG. 4 is shown, (a) is the expanded sectional view, (b) is the side view. It is the enlarged plan view of the principal part which showed the state which locked the keyboard cover in the stopper part in FIG. FIG. 4 is an enlarged sectional view showing an operation process of moving the keyboard lid to the lower side of the instrument body in FIG. 3. It is the expanded sectional view which showed the principal part in Embodiment 2 of the keyboard musical instrument to which this invention is applied. It is an enlarged front view of the principal part which showed the guide rail member of FIG. 8 in the cross section. It is an expanded sectional view of the principal part which showed the state which supports and guides the side edge part of a front cover so that sliding is possible with the guide rail member of FIG. FIG. 9 is an enlarged cross-sectional view showing an operation process of moving the keyboard lid to the lower side of the instrument body in FIG. 8. It is the expanded sectional view which showed the state which moved the keyboard cover to the lower part side of the instrument main body in FIG. FIG. 10 is an enlarged cross-sectional view of a main part illustrating a state in which a keyboard lid is guided and stored by a guide rail member in a modification of the second embodiment. It is the enlarged front view of the principal part which showed the guide rail member in the cross section when the keyboard cover of FIG. 13 was closed and the keyboard part was covered. It is an enlarged plan view of the principal part in FIG. It is the expanded sectional view which showed the principal part in Embodiment 3 of the keyboard musical instrument to which this invention is applied. FIG. 17 is an enlarged cross-sectional view of a main part showing a state in which the keyboard lid is opened and stored in the lower part of the instrument body in FIG. 16.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Musical instrument main body 2 Side plate 4 Keyboard part 12, 26, 35 Keyboard cover 13, 27, 37 Front cover 14, 28, 38 Rear cover 15, 41 Bending connection part 16 Rotation support shaft 17 Support shaft 18 Bearing part 25, 36 Guide Rail member 25a Guide groove 25b Guide support part 29 Guide shaft 31 Guide roller 40 Lid part 42 Spring member

Claims (1)

The instrument body with the keyboard inside,
A keyboard lid in which a front lid that covers the front end side of the keyboard portion and a rear lid that covers the upper side of the keyboard portion are flexibly connected by a bending connection portion;
A lid opening / closing mechanism for movably storing the keyboard lid on the lower side of the instrument body ;
Have
The lid opening / closing mechanism includes a rotation support portion that rotatably supports a lower front end portion of the front lid on a front lower portion of the instrument body corresponding to a lower front end portion of the keyboard portion,
When the keyboard cover is opened to expose the keyboard part, the front cover is rotated around the rotation support part and moved to the lower side of the front part of the instrument body, and the bent connection part is centered. A keyboard instrument, wherein the back cover is moved to the lower rear side of the instrument body while being bent with respect to the front cover .

Images