JP5338324B2 - Keyboard instrument lid opening and closing device - Google Patents

Description

  The present invention relates to a lid opening / closing device for a keyboard instrument in which a keyboard lid is slidably stored in a keyboard instrument such as an electronic piano.

  2. Description of the Related Art Conventionally, in a keyboard instrument, as described in Patent Document 1, a keyboard cover for covering an openable and closable keyboard part arranged in the instrument body is divided into a front cover and a rear cover. And a rear lid are connected to each other so as to be bent by a hinge, and the keyboard lid is moved along a guide rail member so as to be housed on the rear side in the instrument body.

  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 is moved backward along the guide rail member. Folded gradually with respect to the front lid around the hinge, and the folded back lid is stowed upright and tilted toward the rear side of the instrument body located behind the keyboard. Is stored under the top plate of the instrument body in a substantially parallel state.

JP 2007-102045 A

  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.

Therefore, in order to solve such problems, it is considered to store the keyboard lid on the lower side of the instrument body, but the keyboard lid is divided into a front lid and a rear lid so that it can be bent simply by a hinge. With only the configuration, when opening and closing the keyboard lid, the front lid and the rear lid bend freely around the hinge, so the keyboard lid opening and closing operation becomes unstable, and the keyboard lid can be opened and closed safely. The problem that it is not possible arises.

The problem to be solved by the present invention is that the keyboard lid can be housed in the lower part of the instrument body to reduce the overall size of the instrument, and the keyboard lid can be opened and closed safely. Is to provide.

In order to solve the above problems, the present invention includes the following components.
According to the first aspect of the present invention, the instrument body having the keyboard portion disposed therein, 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 rotated by the rotation connecting portion. A keyboard lid that is movably connected, a lid storage portion that is provided on the lower side of the instrument body, and movably accommodates the keyboard lid, and the opening / closing operation of the keyboard lid with respect to the instrument body is a constant movement locus. And a movement restricting member for restricting , wherein the rear cover is divided into a plurality of parts, and is connected in a slidably stacked state .

  According to a second aspect of the present invention, the movement restricting member includes a link member having one end portion rotatably attached to the upper front end in the instrument body and the other end portion rotatably attached to the rear lid. 2. The lid opening / closing device for a keyboard instrument according to claim 1, wherein the lid opening / closing device is for a keyboard instrument.

According to a third aspect of the present invention, the instrument body having the keyboard portion disposed therein, 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 rotated by the rotation connecting portion. A keyboard lid that is movably connected, a lid storage portion that is provided on the lower side of the instrument body, and movably accommodates the keyboard lid, and the opening / closing operation of the keyboard lid with respect to the instrument body is a constant movement locus. A movement regulating member for regulating, the movement regulating member further comprising a rotating body provided at a lower portion of the front lid, and a guide member for guiding the rotating body into the lid housing portion. This is a lid opening / closing device for a keyboard instrument.

According to a fourth aspect of the present invention, the instrument body having the keyboard portion disposed therein, 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 rotated by the rotation connecting portion. A keyboard lid that is movably connected, a lid storage portion that is provided on the lower side of the instrument body, and movably accommodates the keyboard lid, and the opening / closing operation of the keyboard lid with respect to the instrument body is a constant movement locus. and a movement restricting member for restricting the front cover is a cover opening and closing device of a keyboard instrument, characterized in that provided corresponding only to the front upper portion of the keyboard portion exposed from the instrument.

  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 rotatably connected by the rotation connecting portion is moved to the lower side of the instrument body. When the lid is stored in the lid storage portion, the keyboard lid can be opened and closed along a certain movement path with respect to the instrument body by the movement restricting member. And will not turn freely and bend freely.

For this reason, since the keyboard lid is stored in the lid storage section provided on the lower side of the instrument body, 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 section. Even if components such as operation switches, speakers, circuit boards, music rests, etc. are mounted on the rear side, the depth of the instrument body does not increase, and the entire instrument can be sufficiently reduced in size. Since the opening / closing operation of the lid can be regulated to a certain movement locus and the opening / closing operation of the keyboard lid can be stabilized, the keyboard lid can be opened / closed safely.

It is the top view which showed one Embodiment 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. FIG. 3 is an enlarged cross-sectional view showing a main part of the keyboard instrument of FIG. 3 shows the keyboard lid of FIG. 3, (a) is an enlarged cross-sectional view showing a state in which the keyboard lid is closed, and (b) is a state in which the second rear lid of the keyboard lid is slid and superimposed on the first rear lid. It is the expanded sectional view which showed. It is the expanded sectional view which showed the principal part in the BB arrow of the keyboard musical instrument of FIG. FIG. 2 is an enlarged cross-sectional view, partly broken away, showing a portion C of the keyboard instrument of FIG. The link arm and support arm of FIG. 6 are shown, (a) is an enlarged view showing the link arm, and (b) is an enlarged view showing the support arm. FIG. 4 is an enlarged cross-sectional view illustrating a state in which a link arm is raised when the keyboard cover in FIG. 3 is stored in a cover storage unit. It is the expanded sectional view which showed the state which moved the keyboard cover in FIG. 8 further, and the link arm inclined forward and downward. FIG. 10 is an enlarged cross-sectional view showing a state where the keyboard lid in FIG. 9 is further moved and stored in the lid storage portion.

Hereinafter, an embodiment of a lid opening / closing device for a keyboard instrument to which the present invention is applied will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the keyboard instrument includes a musical instrument body 1. The musical instrument main body 1 is provided with a pair of side plates 2 (only one side is shown in FIG. 2) on both left and right sides thereof, and is provided on the upper side of the pair of side plates 2 to form a wide space below the pair. Is configured to do.

As shown in FIGS. 2 and 3, a keyboard portion 3 is provided in the instrument body 1. The keyboard unit 3 includes a large number of keys 3 a made up of white keys and black keys, and a keyboard chassis 4. A large number of keys 3 a are arranged on the keyboard chassis 4, and the rear ends of these keys 3 a are arranged on the keyboard chassis 4. On the rear end portion (on the right end portion in FIG. 3), each key 3a is configured to be rotated in the vertical direction by a key pressing operation in this state.

Further, as shown in FIGS. 2 and 3, the cover case 5 extends from the upper rear part of the keyboard part 3 to the lower rear part of the keyboard part 3 at the upper rear part of the instrument body 1 (upper right part in FIG. 3). Is provided. As shown in FIGS. 1 to 3, an operation switch unit 6 having a plurality of switches for selecting and specifying various functions such as volume and tone is provided on the upper front side of the cover case 5 (upper left side in FIG. 3). ing.

As shown in FIG. 3, a circuit board 7 is provided below the operation switch unit 6 so as to be positioned on the upper rear side of the keyboard unit 3 (upper right side in FIG. 3). Further, as shown in FIG. 1, speakers 8 are respectively provided inside the both sides of the lower side of the cover case 5 located behind the keyboard portion 3. Further, as shown in FIGS. 2 and 3, a music stand 9 is erected on the rear upper portion of the cover case 5 (upper right portion in FIG. 3) while being inclined obliquely upward toward the rear side. Yes.

By the way, as shown in FIG. 3, the musical instrument main body 1 includes a keyboard lid 10 for covering the keyboard portion 3 so as to be opened and closed. Further, a lid housing portion 11 for housing the keyboard lid 10 is provided on the lower side of the instrument body 1. As shown in FIG. 3, the keyboard lid 10 includes a front lid 12 that covers the front end side (left end side in FIG. 3) of the keyboard portion 3, and a rear lid 13 that covers the upper side of the keyboard portion 3. In this case, the rear lid 13 is divided into a first rear lid 14 that covers the front side of the keyboard unit 3 and a second rear lid 15 that covers the rear side of the keyboard unit 3.

That is, as shown in FIGS. 4 (a) and 4 (b), the first rear cover 14 and the second rear cover 15 are respectively provided in the front-rear direction of the keyboard portion 3 so as to protrude upward ( It is formed to be gently curved along the horizontal direction in FIG. Thereby, as shown in FIG. 3, the first rear lid 14 and the second rear lid 15 correspond to an intermediate portion in the front-rear direction of the keyboard portion 3 when arranged so as to cover the upper side of the keyboard portion 3. The point becomes the highest, and the front side of the first rear lid 14 and the rear side of the second rear lid 15 are curved while being gently lowered. For this reason, the 1st back cover 14 and the 2nd back cover 15 are comprised so that the rigidity may be strengthened by each curving gently.

As shown in FIGS. 3, 4 and 6, the keyboard lid 10 has an upper end portion of the front lid 12 and a front end portion (left end portion in FIG. 3) of the first rear lid 14 of the rear lid 13. Are connected to each other by a rotation connecting portion 16. Further, the first rear lid 14 and the second rear lid 15 in the rear lid 13 are configured such that the second rear lid 15 slides on the first rear lid 14 as shown in FIGS. 4 (a) and 4 (b). It is the structure connected so that.

That is, as shown in FIGS. 1 and 4, two guide holes 14a are provided at predetermined positions of the first rear cover 14 along the front-rear direction of the keyboard portion 3 (left-right direction in FIG. 4A). As shown in FIGS. 1 and 5, guide covers 14 b that guide both side portions of the second rear lid 15 are provided on both sides of the first rear lid 14. Further, on the lower surface on the front side of the second rear lid 15, as shown in FIGS. 4A and 4B, two guide pins 15 a respectively moving in the two guide holes 14 a of the first rear lid 14. Is provided.

As a result, as shown in FIGS. 3 and 4A, the rear lid 13 covers the upper side of the keyboard portion 3 and is closed, so that the handle portion 15b provided on the upper rear end of the second rear lid 15 is closed. Is pulled forward (to the left in FIG. 4A) to expose the keyboard portion 3, while the second rear lid 15 slides on the upper surface of the first rear lid 14, the guide pin 15a of the second rear lid 15 Moves in the guide hole 14a of the first rear lid 14, and both side portions of the second rear lid 15 move along the guide cover 14b of the first rear lid 14, and the second rear lid 15 moves to the first rear lid. 14 is configured to overlap.

In this case, as shown in FIG. 4 (b), when the second rear lid 15 overlaps the first rear lid 14, the guide pin 15 a of the second rear lid 15 causes the rear lid 13 to be connected to the first rear lid 14. It abuts against the front end of the guide hole 14a (the left end in FIG. 4 (b)), whereby the slide of the second rear cover 15 relative to the first rear cover 14 is stopped.

Further, as shown in FIG. 4B, the rear lid 13 closes the keyboard portion 3 from a state in which the second rear lid 15 overlaps the first rear lid 14 and the rear side of the keyboard portion 3 is exposed. At this time, the operation reverse to the above is performed, and the guide pin 15a of the second rear lid 15 comes into contact with the rear end (the right end portion in FIG. 4A) of the guide hole 14a of the first rear lid 14, thereby The sliding of the second rear cover 15 with respect to the first rear cover 14 is stopped, and the upper part side of the keyboard unit 3 is covered.

By the way, as shown in FIG. 1, the rear lid 13 has an opening / closing operation of the keyboard lid 10 with a constant movement locus K as shown in FIGS. 8 and 9 by two link arms 17 as movement restriction members. It is configured to be regulated. That is, each of the two link arms 17 is a metal bar, and as shown in FIGS. 1 and 6, one end 17 a is rotatably attached to the upper front end on both sides of the instrument body 1. The other end 17b is rotatably attached to the lower part of the rear end of the first rear lid 14 of the rear lid 13.

In this case, as shown in FIG. 1, the link arm 17 is formed to have substantially the same length as the length of the first rear lid 14 in the front-rear direction (vertical direction in FIG. 1), as shown in FIG. 6 and FIG. As shown, one end portion 17a (the lower end portion in FIG. 7A) is bent at a substantially right angle toward the outside of the musical instrument main body 1 (the left side in FIG. 7A), and the bent one end portion 17a is illustrated. 6, the instrument body 1 is rotatably attached to a bearing hole 18 (only one side is shown in FIG. 6) provided in the upper part of the front end on both inner surfaces.

Further, the other end 17b (the upper end in FIG. 7A) of the link arm 17 is bent at a substantially right angle toward the inner side of the musical instrument main body 1 (the right side in FIG. 7A). The other end 17b is rotatably attached to a mounting plate 19 (see FIG. 4A) provided at the lower rear end of the first rear lid 14. Thereby, the link arm 17 connects the rear part of the first rear cover 14 of the rear cover 13 to the musical instrument main body 1.

For this reason, as shown in FIG. 3, the link arm 17 is positioned below the first rear cover 14 of the rear cover 13 when the keyboard cover 10 is closed and covers the keyboard part 3. 8 and 9, when one end 17a rotates around the bearing hole 18 of the instrument body 1, the rear end of the first rear lid 14 causes the link arm 17 to have a radius as shown in FIGS. As shown in FIG. 10, when the keyboard cover 10 is stored in the cover storage part 11, the bearing hole 18 of the musical instrument main body 1 is adjusted. It is comprised so that it may hang down from.

On the other hand, as shown in FIG. 3, the front lid 12 has a length in the vertical direction such that the front end surface of the keyboard portion 3 exposed above the front end portion of the keyboard chassis 4, that is, the front end surfaces of a large number of keys 3 a. The length is short enough to hide the exposed portion on the front side. Support arms 20 as movement restriction members are provided on both sides of the front lid 12. As shown in FIG. 6, the support arm 20 has one end portion 20 a rotatably attached to both upper portions of the front lid 12, and a pinion gear 21 rotatably attached to the other end portion 20 b. Is configured to move in the lid storage portion 11 as shown in FIGS.

That is, as shown in FIG. 7B, the support arm 20 is a metal rod, and one end 20a (the upper end in FIG. 7B) is inside the instrument body 1 (FIG. 7B). Then, the bent one end 20a is rotatably attached to the upper portion of the front lid 12 as shown in FIG.

Further, as shown in FIG. 7B, the other end 20b (the lower end in FIG. 7B) of the support arm 20 faces the outside of the instrument body 1 (the left side in FIG. 7B). As shown in FIG. 6, a pinion gear 21 is rotatably attached to the bent other end portion 20b, and the pinion gear 21 meshes with the rack gear 22 in the lid storage portion 11 and rolls. It is configured as follows.

In this case, the lid storage unit 11 includes a lid storage case 23 provided on the lower surface of the musical instrument main body 1 as shown in FIG. A rack gear 22 for guiding a pinion gear 21 provided on the support arm 20 of the front lid 12 is provided along the front-rear direction (left-right direction in FIG. 3) of the instrument body 1 at the upper part in the lid storage case 23. A lid guide portion 24 for placing and guiding the rear lid 13 is provided along the front-rear direction (the left-right direction in FIG. 3) of the musical instrument body 1 at the lower portion in the lid storage case 23.

Next, the case where the keyboard cover 10 is opened and closed in this keyboard instrument will be described.
First, when the keyboard lid 10 is closed, as shown in FIG. 3, the front lid 12 and the rear lid 13 are bent at a substantially right angle around the rotation connecting portion 16, and the front lid 12 is bent at the front end of the keyboard portion 3. The rear cover 13 is disposed on the upper side of the keyboard unit 3. At this time, the first rear cover 14 of the rear cover 13 is arranged on the upper side on the front side of the keyboard part 3, and the second rear cover 15 is arranged on the upper side of the rear part side of the keyboard part 3. Further, as shown in FIG. 4A, the guide pin 15a of the second rear lid 15 abuts on the rear end portion (the right end portion in FIG. 4A) of the guide hole 14a of the first rear lid 14. . As a result, the keyboard unit 3 is covered by the keyboard lid 10.

In this state, when the keyboard cover 10 is opened and stored in the cover storage part 11, first, as shown in FIGS. 4 (a) and 4 (b), the second rear cover 15 of the rear cover 13 is removed. While lifting the handle 15b provided at the upper rear end, the handle 15b is moved to the front side (left side in FIG. 4A), and the second rear lid 15 is slid on the first rear lid 14. At this time, as shown in FIGS. 4A and 4B, the guide pin 15a of the second rear lid 15 moves in the guide hole 14a of the first rear lid 14, while the second rear lid 15 Both side portions move along the guide cover 14b of the first rear lid 14 as shown in FIG. As a result, the second rear lid 15 can be smoothly slid on the first rear lid 14.

When the guide pin 15a of the second rear lid 15 comes into contact with the front end (the left end portion in FIG. 4B) of the guide hole 14a of the first rear lid 14, the second rear lid 15 is in contact with the first rear lid 14. The slide is stopped. As a result, the second rear lid 15 overlaps the first rear lid 14, and the rear side of the keyboard portion 3 is opened and exposed upward. In this state, when the handle portion 15b of the second rear lid 15 is further pulled to the near side (left side in FIG. 4), the first rear lid 14 and the second rear lid 15 overlap each other as shown in FIG. Thus, the rear end portion (upper end portion in FIG. 8) of the first rear lid 14 is pushed up by the link arm 17 while the first rear lid 14 moves to the front side (left side in FIG. 8).

That is, when the first rear lid 14 and the second rear lid 15 are overlapped with each other, when moving to the front side (left side in FIG. 8), the one end portion 17a of the link arm 17 is placed on the upper front end of the instrument body 1. Since the other end 17b is rotatably attached to the provided bearing hole 18 and the other end 17b is rotatably attached to the first rear lid 14, the link arm 17 is opposite to the one end 17a. Rotate clockwise. At this time, the front lid 12 and the rear lid 13 rotate in the direction in which the front lid 12 and the rear lid 13 are gradually deployed around the pivot coupling portion 16, while the first rear lid 14 and the second rear lid 15 overlap each other. As shown in FIG. 8, the rear end of the rear lid 14 moves toward the front upper side.

Then, when the first rear lid 14 and the second rear lid 15 overlap each other and move further toward the front side, the front lid 12 and the rear lid 13 are further rotated around the rotation connecting portion 16. As shown in FIG. 8, the rear end portion of the first rear lid 14 is supported by the link arm 17, moves upward in the front side while drawing an arc having the radius of the link arm 17, and the first rear lid 14 Protrudes in front of the instrument body 1 (to the left in FIG. 8). At this time, when the link arm 17 stands substantially vertically, the front lid 12 and the rear lid 13 are suspended by the link arm 17 as shown in FIG.

In this state, when the first rear lid 14 and the second rear lid 15 overlap with each other and move further forward and the link arm 17 further rotates counterclockwise, as shown in FIG. While the first rear lid 14 and the second rear lid 15 overlap each other, the first rear lid 14 moves obliquely downward toward the front side, and the pinion gear 21 of the support arm 20 provided on the front lid 12 It moves along the rack gear 22. At this time, the support arm 20 that connects the front lid 12 and the pinion gear 21 rotates with respect to the front lid 12, so that the on-gear 21 smoothly moves into the lid storage portion 11.

Also at this time, since the rear end portion of the first rear lid 14 is supported by the link arm 17, the first rear lid 14 and the second rear lid 15 are overlapped with each other. The end moves diagonally downward while drawing an arc. Further, at this time, as shown in FIG. 9, the pinion gear 21 of the support arm 20 provided on the front lid 12 is engaged with the rack gear 22 of the lid storage portion 11 from the front side (left side in FIG. 9) to the rear side ( It rolls toward the right side in FIG. Thereby, the front lid 12 and the rear lid 13 move along the rack gear 22, and the front lid 12 is accommodated in the lid accommodating portion 11.

Thereafter, when the link arm 17 is further rotated and suspended, the pinion gear 21 of the front lid 12 is moved to the rear side of the rack gear 22 of the lid storage portion 11 (the right end portion in FIG. 10). ) And the front lid 12 is accommodated on the rear side in the lid accommodating portion 11. Further, the first rear lid 14 and the second rear lid 15 are placed and moved on the lid guide portion 24 of the lid accommodating portion 11 while being overlapped, and are accommodated in the lid accommodating case 23. Note that when the keyboard lid 10 is closed, an operation opposite to the above-described operation is performed.

As described above, according to the lid opening / closing device of the keyboard instrument, the front lid 12 covering the front end side of the keyboard portion 3 and the rear lid 13 covering the upper side of the keyboard portion 3 can be freely rotated by the rotation connecting portion 16. When the connected keyboard lid 10 is moved to the lower side of the musical instrument main body 1 and stored in the lid storage portion 11, the rear lid 13 of the keyboard lid 10 is fixed to the musical instrument main body 1 by the link arm 17 as a movement restricting member. Since it can be opened and closed along the movement trajectory, the front lid 12 and the rear lid 13 of the keyboard lid 10 do not freely rotate and bend freely around the pivot coupling portion 16.

For this reason, since the keyboard lid 10 is accommodated in the lid accommodating portion 11 provided on the lower side of the musical instrument main body 1, it is necessary to provide a space for accommodating the keyboard lid 10 in the musical instrument main body 1 located on the rear side of the keyboard portion 3. Even if components such as the operation switch unit 6, the circuit board 7, the speaker 8, and the music stand 9 are mounted on the rear side of the keyboard unit 3, the depth of the musical instrument main body 1 does not increase, and the entire musical instrument 1 In addition to being able to reduce the size, the link arm 17 restricts the opening / closing operation of the keyboard lid 10 to a constant movement locus, so that the opening / closing operation of the keyboard lid 10 can be stabilized, and thus the keyboard lid 10 can be It can be opened and closed safely.

In this case, one end portion 17 a of the link arm 17 is rotatably attached to a bearing hole 18 provided at the upper front end in the musical instrument main body 1, and the other end portion 17 b is attached to the first rear lid 14 of the rear lid 13. Since it is rotatably attached to the provided mounting plate 19, when the keyboard lid 10 is opened and closed, the one end portion 17 a of the link arm 17 rotates about the bearing hole 18 of the musical instrument main body 1. The opening / closing operation of the rear lid 13 can be reliably restricted to a constant movement trajectory so that the first rear lid 14 connected to the other end 17b of the link arm 17 draws an arc having the radius of the link arm 17. .

The rear lid 13 is divided into a first rear lid 14 that covers the front side of the keyboard unit 3 and a second rear lid 15 that covers the rear side of the keyboard unit 3. Since the rear cover 15 is slidably connected to be overlapped, the first rear cover 14 and the second rear cover 15 are stacked and stored when the keyboard cover 10 is stored in the cover storage unit 11. can do.

For this reason, since the depth of the lid storage portion 11 can be shortened, the keyboard lid 10 can be stored in a compact manner, and thereby further downsizing of the entire musical instrument can be achieved. Further, since the first rear lid 14 and the second rear lid 15 are opened and closed in an overlapping state, the movement trajectory K of the entire rear lid 13 by the link arm 17 can be reduced, thereby making the keyboard lid 10 compact. And can be opened and closed safely.

In this case, the first rear lid 14 and the second rear lid 15 of the rear lid 13 are gently curved along the front-rear direction (left-right direction in FIG. 4) of the keyboard portion 3 so as to protrude upward. Therefore, when the first rear lid 14 and the second rear lid 15 are arranged so as to cover the upper side of the keyboard portion 3, the portion corresponding to the intermediate portion in the front-rear direction of the keyboard portion 3 is the most. The height increases, and the first rear lid 14 and the second rear lid 15 are gently inclined in the front-rear direction. For this reason, since the first rear lid 14 and the second rear lid 15 are gently curved as a whole, the rigidity of the entire rear lid 13 can be enhanced. Even if each thickness with the rear lid 15 is made thin, the strength as the rear lid 13 can be sufficiently secured.

In the lid opening / closing device of the keyboard instrument, as a movement restricting member, a pinion gear 21 that is a rotating body provided at the lower portion of the front lid 12 and a guide member that guides the pinion gear 21 into the lid housing portion 11. Since the rack gear 22 is further provided, the pinion gear 21 of the front cover 12 can be engaged with the rack gear 22 and rolled when the keyboard cover 10 is opened and closed. For this reason, the front lid 12 can be smoothly moved within the lid housing portion 11 and the movement trajectory in the opening / closing operation of the front lid 12 can be surely restricted, so that the keyboard lid 10 can also be opened / closed. The keyboard cover 10 can be opened and closed safely.

Further, since the front lid 12 is provided corresponding to only the upper front end portion of the keyboard portion 3 exposed from the instrument body 1, the length of the front lid 12 in the vertical direction, that is, the length when stored is shortened. As a result, the keyboard lid 10 can be stored in a compact manner, so that the entire musical instrument can be further reduced in size.

In the above-described embodiment, the case where the rear cover 13 of the keyboard cover 10 is divided into the first rear cover 14 and the second rear cover 15 has been described. The rear cover may be divided into three or more. In this case as well, the lid parts divided into a plurality of rear lids may be connected in a slidably stacked state. If comprised in this way, a keyboard cover can be accommodated more compactly than embodiment mentioned above. Moreover, it is not always necessary to divide the rear cover into a plurality of parts, and a structure in which the rear cover is rotatably connected to the front cover may be used.

DESCRIPTION OF SYMBOLS 1 Musical instrument body 3 Keyboard part 10 Keyboard cover 11 Cover storage part 12 Front cover 13 Rear cover 14 1st back cover 14a Guide hole 14b Guide cover 15 2nd back cover 15a Guide pin 16 Rotation connection part 17 Link arm 17a Link arm One end portion 17b The other end portion of the link arm 18 Bearing hole 20 Support arm 21 Pinion gear 22 Rack gear 23 Cover housing case K Movement locus

Claims (4)

The instrument body with the keyboard inside,
A keyboard lid in which a front lid covering the front end side of the keyboard portion and a rear lid covering the upper side of the keyboard portion are rotatably connected by a rotation connecting portion;
A lid storage portion provided on the lower side of the instrument body for movably storing the keyboard lid;
A movement restricting member for restricting the opening and closing operation of the keyboard lid with respect to the instrument body to a constant movement locus ,
The lid opening / closing device for a keyboard instrument, wherein the rear lid is divided into a plurality of pieces and connected in a slidably stacked manner.   The movement restricting member includes a link member having one end portion rotatably attached to an upper portion of a front end in the instrument body and the other end portion rotatably attached to the rear lid. The lid opening / closing device for a keyboard instrument according to claim 1. The instrument body with the keyboard inside,
A keyboard lid in which a front lid covering the front end side of the keyboard portion and a rear lid covering the upper side of the keyboard portion are rotatably connected by a rotation connecting portion;
A lid storage portion provided on the lower side of the instrument body for movably storing the keyboard lid;
A movement restricting member for restricting the opening and closing operation of the keyboard lid with respect to the instrument body to a constant movement locus,
The lid opening / closing device for a keyboard instrument, wherein the movement restricting member further includes a rotating body provided at a lower portion of the front lid and a guide member for guiding the rotating body into the lid housing portion. The instrument body with the keyboard inside,
A keyboard lid in which a front lid covering the front end side of the keyboard portion and a rear lid covering the upper side of the keyboard portion are rotatably connected by a rotation connecting portion;
A lid storage portion provided on the lower side of the instrument body for movably storing the keyboard lid;
A movement restricting member for restricting the opening and closing operation of the keyboard lid with respect to the instrument body to a constant movement locus,
A lid opening / closing device for a keyboard instrument, wherein the front lid is provided corresponding to only an upper front end portion of the keyboard portion exposed from the instrument body.

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