JP2009145711A - Opening/closing device of keyboard cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing cover capable of stabilizing the opening/closing operation of front and rear covers by one common guide part and a rear support guide part, and downsizing the entire musical instrument by making the front cover shorter than the rear cover. <P>SOLUTION: When a keyboard cover 3 is moved toward the rear part of a musical instrument case 1, a front support member 16 and an intermediate support member 17 are guided by a common guide part 15, front and rear covers 12 and 13 are bent backward by a hinge 14 to move backward, and the intermediate support member 17 moves while displacing the front of the rear cover 13 up and down according to the movement of the rear cover 13, thereby moving the front cover 12 and the front of the rear cover 13 in a stabilized state. In this case, the rear part of the rear cover 13 is moved, by a rear support guide member 18, backward obliquely downward from the rear upper part of the key board part 2 in a stabilized state, thereby erecting the rear cover 13 in the musical instrument case 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a keyboard lid opening / closing device used for a keyboard instrument such as an electronic piano.

Conventionally, in a keyboard instrument, as described in Patent Document 1, in order to make the instrument case compact, the keyboard lid is divided into a front lid and a rear lid, and the front lid and the rear lid are connected. It is known that a keyboard cover is configured by being foldably connected by a section, and that the keyboard section provided in the instrument case is covered with the keyboard cover so as to be freely opened and closed. In other words, when the keyboard instrument is opened to expose the keyboard part, the front cover and the rear cover are folded at the connecting part and stored in the instrument case, and when the keyboard cover is closed to cover the keyboard part. In addition, the front lid and the rear lid are configured to be continuously arranged in a flat plate shape above the keyboard portion.
JP2007-248968

  In such a keyboard lid opening / closing device for a keyboard instrument, when the keyboard lid is opened and closed, the front lid and the rear lid are bent at the connecting portion, and therefore the movement locus of the rear portion of the front lid and the front portion of the rear lid is different. Along with this, two guide groove portions, a front guide groove portion for guiding the front portion of the front lid and a rear guide groove portion for guiding the front portion of the rear lid, are necessary, and the keyboard lid is housed in the instrument case. When the front cover is moved from the front side to the rear side of the keyboard part, the rear cover is bent at the connecting part and moved rearward toward the rear of the keyboard part, and the front cover is stored in the instrument case. At this time, in order to raise and store the rear lid in the instrument case behind the keyboard portion, a rear lid support guide member that supports and guides the rear portion of the rear lid is necessary.

  The rear lid support guide member is provided with a curved rack that guides the rear lid obliquely downward from above the keyboard portion to the rear of the keyboard portion, and is rotatably provided at the rear portion of the rear lid so as to mesh with the rack and roll. A pinion gear and a guide rail that guides the rotation axis of the pinion gear along the rack. When the keyboard cover is opened and stored in the instrument case, the pinion gear meshes with the rack and rotates while the pinion gear rotates. When the rotation shaft is guided by the guide rail, the pinion gear moves obliquely from the upper side toward the lower rear side along the rack, so that the rear lid is raised in the instrument case.

  In such a conventional keyboard lid opening and closing device, when the rear lid is stood and stored in the instrument case located behind the keyboard portion by the rear lid support guide member that guides while supporting the rear portion of the rear lid, If the length of the back cover in the front-rear direction is long, the bottom surface of the back cover can easily come into contact with the upper rear end of the keyboard part, and the back cover can be smoothly guided downward and diagonally toward the back of the keyboard part. Not only does this occur, but the storage space for the back cover in the musical instrument case located behind the keyboard section must be sufficiently large, so that the length of the back cover in the front-rear direction needs to be as short as possible.

  For this reason, in this conventional keyboard lid opening / closing device, the front lid and the rear lid are bent at the connecting portion to guide the front portion of the rear lid in addition to the front guide groove portion that guides the front portion of the front lid. The rear guide groove portion and the guide rail of the rear lid support guide member for guiding the rear portion of the rear lid are necessary. However, if the rear guide groove portion for guiding the rear lid is formed long, the rear guide groove portion of the instrument case It is visible from the outside and is not preferable in appearance. For this reason, it is necessary to form the rear guide groove portion short. However, if the rear guide groove portion is shortened and the front guide groove portion is formed long, the front lid becomes longer than the rear lid, and accordingly the depth of the instrument case is increased. This increases the overall size of the musical instrument.

  The problem to be solved by the present invention is that the opening / closing operation of the front lid and the rear lid can be stabilized with one common guide portion and the rear support guide member, and the front lid is shorter than the rear lid. It is another object of the present invention to provide a keyboard lid opening and closing device that can reduce the overall size of the musical instrument.

In order to solve the above problems, the present invention includes the following components.
According to the first aspect of the present invention, a keyboard lid is formed by connecting a front lid and a rear lid so that the front lid and the rear lid can be bent by a coupling portion, and the keyboard portion that covers the keyboard portion provided in the musical instrument case with the keyboard lid can be opened and closed. In the lid opening / closing apparatus, the common guide portion provided in the instrument case along the front-rear direction of the keyboard portion and the front portion of the front lid can be moved along the common guide portion in the front-rear direction of the keyboard portion. A front support member that supports the front portion of the front lid, and a front portion of the rear lid adjacent to the rear portion of the front lid so as to be movable in the front-rear direction of the keyboard portion along the common guide portion, and according to the movement of the rear lid An intermediate support member that is displaced in the vertical direction, and when the keyboard cover is opened, the rear part of the rear cover is moved obliquely downward from the rear upper part of the keyboard part to the rear, and the rear cover is moved into the instrument case. And a rear support guide member It is switchgear fallboard characterized by.

  According to a second aspect of the present invention, the rear support guide member includes a support shaft provided in the instrument case, an arm portion having one end portion rotatably attached to the support shaft in the vertical direction, A connecting shaft that rotatably connects the other end of the arm portion and the rear portion of the rear lid, and the arm portion rotates up and down around the support shaft. 2. The keyboard according to claim 1, wherein the connecting shaft draws an arc-shaped movement trajectory centered on the support shaft, and guides the rear portion of the rear lid along the arc-shaped movement trajectory. It is a lid opening and closing device.

  According to a third aspect of the present invention, in the keyboard cover according to the second aspect, the rear support guide member includes a biasing member that biases the rear portion of the rear lid in a direction in which the rear portion is always pushed up. It is a switchgear.

  According to a fourth aspect of the present invention, the intermediate support member moves along the common guide portion, a connecting body that connects the moving body to a lower surface of the rear lid, and the movement. The displacement member which urges | biases a body in the direction away from the lower surface of the said rear cover, and displaces the space | interval of the said moving body and the lower surface of the said rear cover relatively is provided. This is a keyboard lid opening and closing device.

  According to a fifth aspect of the present invention, the displacement member causes the movable body to elastically approach the lower surface of the rear lid when the front lid and the rear lid cover and close the upper portion of the keyboard portion. The front portion of the rear lid is displaced downward, and when the front lid and the rear lid are opened, the moving body is elastically pulled away from the lower surface of the rear lid to gradually move the front portion of the rear lid. 5. The keyboard lid opening and closing device according to claim 4, wherein the opening and closing device is a spring member displaced upward.

  According to the present invention, when opening the keyboard cover by moving it toward the rear of the musical instrument case, the front support member and the intermediate support member are guided by the common guide part, and the front cover and the rear cover are bent at the connecting part and rearward. And the intermediate support member moves while displacing the front portion of the rear lid in the vertical direction in accordance with the movement of the rear lid, so that the front lid and the front portion of the rear lid are moved by one common guide portion. Can be moved in a stable state. In this case, the rear support guide member can move the rear portion of the rear lid from the upper rear portion of the keyboard portion to the rear side in a stable and obliquely lower position so that the rear lid can stand up well in the instrument case. it can.

  For this reason, when opening and closing the keyboard cover, the front support member, the intermediate support member, and the rear support guide member are all interlocked, and the front cover and the rear cover are formed by one common guide portion and the rear support guide member. As a result, the opening / closing operation of the keyboard lid can be stabilized, and the front portion of the front lid and the front portion of the rear lid are guided by a single common guide portion, thereby impairing the appearance. Therefore, the front lid can be formed shorter than the rear lid, and the depth of the musical instrument case can be shortened, so that the entire musical instrument can be downsized.

Hereinafter, an embodiment in which the present invention is applied to a keyboard instrument will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the keyboard instrument has a keyboard part 2 arranged on the front side (left side in FIG. 1) in the instrument case 1, and the keyboard part 2 is located above the keyboard part 2 in the instrument case 1. The keyboard lid 3 is provided so as to be freely opened and closed.

  In this case, the musical instrument case 1 includes a bottom plate 4 as shown in FIGS. 1 and 3. A front plate 5 is erected at the front end portion (left end portion in FIG. 1) of the bottom plate 4, and a rear plate 6 is erected at the rear end portion (right end portion in FIG. 1) of the bottom plate 4. . Further, side plates 7 are erected on both sides of the bottom plate 4 (in FIG. 1, on the front and back sides of the paper surface), and a top plate 8 is provided above the side plates 7 and the rear plate 6. As a result, the musical instrument case 1 is configured such that the space between the front plate 5 and the top plate 8 is opened upward.

  As shown in FIGS. 1 and 2, the keyboard unit 2 includes a plurality of keys 10 such as white keys and black keys, and a keyboard chassis 11 in which the plurality of keys 10 are arranged. In this case, the plurality of keys 10 are provided on the keyboard chassis 11 so as to be rotatable in the vertical direction, and are configured to be rotated by a key pressing operation. The keyboard chassis 11 is disposed on the front side (the left side in FIG. 1) on the upper surface of the bottom plate 4 of the musical instrument case 1. Thereby, the keyboard part 2 is located between the front plate 5 and the top plate 8 in a state where the plurality of keys 10 are arranged on the keyboard chassis 11 so that the upper side of the plurality of keys 10 is exposed to the outside. It is configured.

  As shown in FIGS. 1 and 3, the keyboard lid 3 is divided into a front lid 12 and a rear lid 13, and the divided front lid 12 and rear lid 13 are separated by a hinge 14 as a connecting portion. In this state, it is connected so that it can be bent, and in this state, it is provided on the upper side of the keyboard part 2 in the musical instrument case 1 so as to be movable along the front-rear direction (FIG. 1 is the left-right direction). It is configured. In this case, the length of the front lid 12 in the front-rear direction is shorter than that of the rear lid 13, and is formed, for example, to be approximately half the length of the rear lid 3 in the front-rear direction. Accordingly, the top plate 8 is formed such that the length in the front-rear direction is slightly longer than the front lid 12 and sufficiently shorter than the rear lid 13.

  As shown in FIGS. 1 to 3, the opening / closing device for the keyboard lid 3 includes a common guide portion 15 provided in the musical instrument case 1 along the front-rear direction of the keyboard portion 2 and a front portion of the front lid 12 (FIG. 1). 1 on the left side) and a front support member 16 that supports the front part 12 so as to be movable in the front-rear direction of the keyboard part 2 along the common guide part 15 and a front part (the left side part in FIG. ) Along the common guide portion 15 so as to be movable in the front-rear direction of the keyboard portion 2 and displaced in the vertical direction in accordance with the movement of the rear lid 13, and the rear lid when the keyboard lid 3 is opened. A rear support guide member 18 for moving the rear part 13 (right side in FIG. 1) obliquely downward from the rear upper part of the keyboard part 2 to the rear to raise the rear lid 13 in the instrument case 1. Yes.

  In this case, as shown in FIGS. 1 and 3, the common guide portion 15 is formed on the inner surface of each side plate 7 located on both sides of the musical instrument case 1 from the front portion (left side in FIG. 1) to the rear portion (right side in FIG. 1). ) Is a single groove portion continuously provided. That is, the common guide portion 15 has a front end portion formed substantially perpendicularly along the front end portion of the keyboard portion 2, and a front portion side continuous with the upper portion of the front end portion is gently rearward along the upper portion of the keyboard portion 2. An intermediate portion that is formed on the front inclined portion that rises toward the front portion, and an intermediate portion that is continuous with the front inclined portion is formed substantially horizontally from the intermediate portion to the rear side of the keyboard portion 2, and the rear portion that is continuous with the intermediate portion is the rear plate 6. It is the structure formed in the rear side inclination part which descend | falls slowly toward.

  As shown in FIGS. 1 and 3, the front support member 16 is attached to the front end portion of the front lid 12 and has a handle portion 20 for moving the front lid 12. The front support member 16 is provided on the handle portion 20 and faces the front side. And a front shaft portion 22 that is attached to the lower end portion of the foot portion 21 and moves along the common guide portion 15. Thereby, as shown in FIG. 3, when the keyboard cover 3 is closed, the front side support member 16 is located at the lower part of the front end portion of the common guide portion 15, and as shown in FIG. When the keyboard lid 3 is opened, the front shaft portion 22 moves from the lower portion of the front end portion of the common guide portion 15 to the rear portion of the horizontal intermediate portion via the front inclined portion, so that the front lid is placed below the top plate 8. 12 is guided and supported.

  As shown in FIGS. 1 and 3, the rear support guide member 18 includes a support plate 23 provided on the bottom plate 4 of the musical instrument case 1, a support shaft 24 provided on each of the support plates 23, and this support Each of the shafts 24 includes an arm portion 25 having one end portion rotatably attached in the vertical direction, and a connecting shaft 26 that rotatably attaches the other end portion of the arm portion 25 and both sides of the rear portion of the rear lid 13. . In this case, as shown in FIGS. 3 and 4, the support plate 23 is positioned on the side plates 7 on both sides in a state of being located below the rear portion of the key 10 of the keyboard portion 2 provided in the instrument case 1. Provided on both sides of the approaching bottom plate 4, support shafts 24 are respectively attached to the upper portions thereof.

  As shown in FIG. 3, the arm portion 25 is formed in a substantially U shape so as to avoid the rear end portion of the key 10 so as not to contact the rear end portion of the key 10 of the keyboard portion 2. As shown in FIGS. 3 and 4, the arm portion 25 has a lower end portion attached to a support shaft 24 positioned below the rear portion of the key 10 so as to be rotatable in the vertical direction. That is, as shown in FIG. 3, when the arm portion 25 is turned around the support shaft 24 and stands up, the upper end portion is positioned above the rear end portion of the key 10. As shown in FIG. 2, when the support shaft 24 is rotated about the support shaft 24 and laid down on the rear side of the keyboard portion 2, the intermediate portion of the arm portion 25 comes into contact with the cushion material 4a provided on the bottom plate 4 of the musical instrument case 1. It is configured as follows.

  Thereby, as shown in FIGS. 1, 3, and 4, when the arm portion 25 rotates in the vertical direction about the support shaft 24, the rear support guide member 18 moves along with the rotation of the arm portion 25. The connecting shaft 26 attached to the other end of the portion 25 moves in the vertical direction while drawing an arcuate movement trajectory centered on the support shaft 24, and the rear portion of the rear lid 13 is moved along with the movement of the connecting shaft 26. Is configured to guide in the vertical direction while supporting the rear portion of the rear lid 13 by moving in the vertical direction along the movement locus of the connection shaft 26 while relatively rotating around the connection shaft 26. .

  In this case, as shown in FIGS. 1, 3, and 4, a spring member 27, which is an urging member that urges the rear portion of the rear lid 13 in a direction that always pushes up, is attached to the support shaft 24. The spring member 27 is wound around the support shaft 24, one end is attached to the support plate 23, and the other end is attached to the arm portion 25, so that the rear portion of the rear lid 13 is always pushed up. It is comprised so that it may bias. That is, as shown in FIGS. 1 and 3, the spring member 27 prevents the rear cover 13 from dropping rapidly due to its weight when the rear portion of the rear cover 13 moves from the upper side to the diagonally lower side. In addition, when the rear portion of the rear lid 13 moves obliquely upward from the lower side, the force for lifting the rear lid 13 is reduced.

  On the other hand, as shown in FIGS. 1 and 3, the intermediate support member 17 includes a rear shaft portion 28 that is a moving body that moves along the common guide portion 15, and the rear shaft portion 28 in front of the rear lid 13. And a connecting member 29 which is a connecting body connected to the lower surface of the part. Thereby, as shown in FIG. 3, when the keyboard cover 3 is closed, the intermediate support member 17 has the rear shaft portion 28 positioned at the front portion of the horizontal intermediate portion of the common guide portion 15, as shown in FIG. As shown in the figure, when the keyboard cover 3 is opened, the rear shaft portion 28 moves through the horizontal intermediate portion of the common guide portion 15 to the rear end portion of the rear inclined portion of the common guide portion 15. ing.

  In this case, as shown in FIG. 5 to FIG. 8, the connecting member 29 is a rotating foot on which a mounting plate 30 attached to the lower surface of the front portion of the rear lid 13 and a rear shaft portion 28 are rotatably attached. A portion 31, a hinge portion 32 that rotatably connects the rotating foot portion 31 to the mounting plate 30, and a stopper portion 33 that restricts the rotating foot portion 31 to a position perpendicular to the lower surface of the rear lid 13. I have. As a result, as shown in FIG. 8A and FIG. 8B, the connecting member 29 is brought into contact with and separated from the mounting plate 30 as the rotating foot portion 31 rotates in the vertical direction around the hinge portion 32. By doing so, the front portion of the rear lid 13 is configured to move in the vertical direction with respect to the common guide portion 15.

  In addition, as shown in FIG. 3, when the front lid 12 and the rear lid 13 cover the upper portion of the keyboard portion 2 and closes the connecting member 29, as shown in FIG. As shown in FIGS. 9 and 10, the front cover 12 and the rear cover 13 are directed rearward as shown in FIGS. When moving, as shown in FIG. 8A, a displacement member 34 is provided that elastically separates the rear shaft portion 28 from the lower surface of the rear lid 13 and gradually displaces the front portion of the rear lid 13 upward. Yes. That is, the displacement member 34 is a spring member, and is wound around the shaft 32a of the hinge portion 32, one end portion is locked to the mounting plate 30, and the other end portion is rotated as shown in FIGS. The rear shaft portion 28 that is locked to the foot portion 31 and is thereby guided by the common guide portion 15 is configured to be elastically displaced in the vertical direction with respect to the lower surface of the rear lid 13.

Next, the opening / closing operation of the keyboard lid 3 will be described.
First, as shown in FIG. 3, when the keyboard lid 3 is closed and the keyboard portion 2 is covered, the front lid 12 and the rear lid 13 continue to form a substantially flat plate slightly lowering forward, and the front lid 12 The front side of the keyboard unit 2 is covered, and the rear cover 13 covers the rear side of the keyboard unit 2. At this time, the front shaft portion 22 of the front support member 16 provided at the front portion of the front lid 12 is located at the front end portion of the common guide portion 15, and the rear of the intermediate support member 17 provided at the front portion of the rear cover 13. The side shaft portion 28 is located on the front side of the horizontal intermediate portion of the common guide 15, and the arm portion 25 of the rear side support guide member 18 is turned up around the support shaft 24, and The rear portion of the rear lid 13 connected to the other end portion by the connecting shaft 26 is located above the rear portion of the keyboard portion 2.

  In this case, the weight of the rear cover 13 is added to the connecting member 29 of the intermediate support member 17 because the keyboard cover 3 is continuous in a substantially flat plate shape with a slight forward drop. The member 34 is elastically deformed, and as shown in FIG. 8B, the rotating foot portion 31 of the connecting member 29 rotates counterclockwise around the hinge portion 32 against the elastic force of the displacement member 34. Thus, as shown in FIG. 3, the rear shaft portion 28 elastically approaches the lower surface of the rear lid 13. As a result, the rear lid 13 is displaced downward and approaches the common guide portion 15, and the front lid 12 and the rear lid 13 are arranged in a slightly downwardly inclined manner in a state of being substantially flat.

  In this state, when opening the keyboard lid 3 by moving it backward, first, as shown in FIG. 9, the handle portion 20 of the front lid 12 is lifted to raise the front portion of the front lid 12. At this time, the arm portion 25 of the rear support guide member 18 does not rotate around the support shaft 24 but rotates around the connecting shaft 26 that connects the arm portion 25 and the rear portion of the rear lid 13. With the shaft 26 as a fulcrum, the front lid 12 and the rear lid 13 are pulled up to a substantially horizontal state in a state where they are continuous in a flat plate shape.

  For this reason, the front portion of the rear lid 13 moves upward with respect to the common guide portion 15, and accordingly, the rotating foot portion 31 of the connecting member 29 is elastic of the displacement member 34 as shown in FIG. It is rotated clockwise around the hinge portion 32 by force. As a result, as shown in FIG. 9, the lower surface of the rear lid 13 is elastically separated from the rear shaft portion 28 and the rotating foot portion 31 of the connecting member 29 stands on the lower side of the rear lid 13 to stop the stopper. The position is restricted by contacting the portion 33.

  Thereafter, when the keyboard lid 3 moves rearward, as shown in FIG. 10, the front shaft portion 22 of the front support member 16 provided at the front portion of the front lid 12 moves rearward along the common guide portion 15. While moving, the rear shaft portion 28 of the intermediate support member 17 provided at the front portion of the rear lid 13 moves rearward along the common guide portion 15. At this time, the rear part of the rear lid 13 is guided by the rear support guide member 18 and moves obliquely downward from the rear upper part of the keyboard part 2 toward the rear of the keyboard part 2. As a result, the rear lid 13 is gradually bent downward with respect to the front lid 12 around the hinge 14.

  That is, as shown in FIG. 10, in the rear side support guide member 18, the arm portion 15 rotates clockwise around the support shaft 24 as the rear lid 13 moves rearward. The connecting shaft 26 that connects the arm portion 25 and the rear portion of the rear lid 13 moves obliquely from the upper side to the lower side while drawing an arc-shaped movement trajectory centered on the support shaft 24 in accordance with the rotation operation. As the shaft 26 moves, the rear portion of the rear cover 13 moves obliquely downward along the movement locus of the connecting shaft 26 from the rear upper portion of the keyboard portion 2 toward the rear of the keyboard portion 2.

  At this time, the weight of the rear lid 13 is applied to the arm portion 25, but the rear portion of the rear lid 13 is always pushed up by the spring force of the spring member 27 provided on the support shaft 24, so the rear portion of the rear lid 13 is slowly lowered. Let Further, at this time, since a large load due to the weight of the rear lid 13 is not applied to the rear shaft portion 28 of the intermediate support member 17, the rotating foot portion 31 of the connecting member 29 in the intermediate support member 17 is located below the rear lid 13. The rear portion of the front lid 12 is prevented from lowering by moving along the common guide portion 15 in a state where the rear shaft portion 28 is separated from the lower surface of the rear lid 13. I support it.

  When the keyboard lid 3 is fully opened, the rear lid 13 stands up almost vertically in the instrument case 1 located behind the keyboard portion 2 and the front lid 12 is attached to the top plate 8 as shown in FIG. Arranged almost horizontally on the lower side. That is, the arm portion 25 of the rear support guide member 18 rotates clockwise around the support shaft 24, and the intermediate portion of the arm portion 25 abuts against the cushion material 4 a on the bottom plate 4 of the musical instrument case 1, A connecting shaft 26 that connects the other end of 25 and the rear portion of the rear lid 13 moves to the lower rear side in the musical instrument case 1. As a result, the rear lid 13 stands upright in a vertical state substantially parallel to the rear plate 6 of the musical instrument case 1.

  Therefore, the rear portion of the front lid 12 connected to the front portion of the rear lid 13 by the hinge 14 is supported by the front portion (upper portion in FIG. 1) of the rear lid 13 as shown in FIG. The front lid 12 is bent at a substantially right angle with respect to the rear lid 13 around the hinge 14. Further, the front portion of the front lid 12 is supported by the front support member 16 with the front shaft portion 22 of the front support member 16 positioned at the rear portion of the horizontal intermediate portion of the common guide portion 15. Thereby, the front lid 12 is supported in a substantially horizontal state on the lower side of the top plate 8 in the musical instrument case 1.

  When the rear lid 13 stands in the instrument case 1, the rear shaft portion 28 of the intermediate support member 17 moves to the rear end portion of the common guide portion 15 as shown in FIG. 1. At this time, since the rear portion of the front lid 12 is gradually separated upward from the common guide portion 15, in order to separate the rear shaft portion 28 of the intermediate support member 17 from the hinge 14, the rotation of the connecting member 29 in the intermediate support member 17 is performed. The moving foot portion 31 rotates around the hinge portion 32 in the direction approaching the rear lid 13 against the spring force of the displacement member 34. As a result, the rear lid 13 stands upright in the instrument case 1 in a substantially vertical state, and the front lid 12 is supported substantially horizontally below the top plate 8 in the instrument case 1 so that the keyboard portion 2 is exposed to the outside on the upper side. Let

  On the other hand, when the keyboard cover 3 is accommodated in the instrument case 1 and opened and the keyboard cover 3 is moved and closed, the handle 20 of the front cover 12 is moved to the front side in the state shown in FIG. Pull out (left side in FIG. 1). At this time, the front shaft portion 22 of the front support member 16 provided at the front portion of the front lid 12 and the rear shaft portion 28 of the intermediate support member 17 provided at the front portion of the rear lid 13 are common guide portions. 15, the front lid 12 and the rear lid 13 move to the front side while being bent in a direction in which they are gradually expanded by the hinge 14.

  At this time, since the rear portion of the rear lid 13 is pulled up with the movement of the rear lid 13, the arm portion 25 rotates counterclockwise around the support shaft 24, and the rear portion of the rear lid 13 moves upward. . At this time, the arm portion 25 is biased counterclockwise about the support shaft 24 by the spring force of the spring member 27 attached to the support shaft 24 of the rear side support guide member 18, so that the rear lid 13 is moved to the keyboard portion. 2, the rear lid 13 can be pulled up with a light force even when the total weight of the rear lid 13 is added to the connecting portion 26 that connects the arm portion 25 and the rear portion of the rear lid 13. . Thereby, the keyboard cover 3 can be easily moved to the front side and closed.

  Thus, according to the opening / closing device of the keyboard lid 3 in this keyboard instrument, the common guide portion 15 provided in the musical instrument case 1 along the front-rear direction of the keyboard portion 2 and the front portion of the front lid 12 are connected to the common guide portion. A front support member 16 that supports the front part of the keyboard part 2 so as to be movable in the front-rear direction of the keyboard part 2 along the front part 15 and a front part of the rear cover 13 adjacent to the rear part of the front cover 12 An intermediate support member 17 that is movably supported and displaced in the vertical direction in accordance with the movement of the rear lid 13, and the rear portion of the rear lid 13 is directed rearward from the upper rear portion of the keyboard portion 2 when the keyboard lid 3 is opened. Since the rear support guide member 18 for moving the rear lid 13 upright in the instrument case 1 is provided, the opening / closing operation of the keyboard lid 3 can be stabilized and the front lid 12 can be moved rearward. The size of the entire instrument is reduced by forming it shorter than the lid 13 Rukoto can.

  That is, according to the opening / closing device for the keyboard cover 3, when the keyboard cover 3 is moved and opened toward the rear of the instrument case 1, the front shaft portion 22 of the front support member 16 and the rear shaft portion of the intermediate support member 17 are provided. 28 is guided by the common guide portion 15, and the front lid 12 and the rear lid 13 move backward while being bent by the hinge 14, and the intermediate support member 17 is moved to the front portion of the rear lid 13 according to the movement of the rear lid 13. Can be moved in a state where the front lid 12 and the front portion of the rear lid 13 are stabilized. Further, at this time, the rear support guide member 18 moves the rear part of the rear lid 13 from the upper rear part of the keyboard part 2 to the rear side in a stable and obliquely downward direction so that the rear cover 13 is placed in the instrument case 1. Can stand up.

  For this reason, when opening and closing the keyboard lid 3, all of the front support member 16, the intermediate support member 17, and the rear support guide member 18 are interlocked so that one common guide portion 15 and the rear support guide member 18 Since the front lid 12 and the rear lid 13 can be guided by this, the opening / closing operation of the keyboard lid 3 can be stabilized, and the front portion of the front lid 12 and the front portion of the rear lid 13 are shared by one. By being guided by the guide portion 15, the front lid 12 can be formed shorter than the rear lid 13 without impairing the appearance, and thus the depth of the musical instrument case 1 can be shortened. Can be miniaturized.

  In this case, the rear support guide member 18 includes a support shaft 24 provided on a support plate 23 in the musical instrument case 1, an arm portion 25 having one end rotatably attached to the support shaft 24 in the vertical direction, A connecting shaft 26 that connects the other end of the arm portion 25 and the rear portion of the rear lid 13 so as to be rotatable in the vertical direction is provided. The arm portion 25 rotates in the vertical direction around the support shaft 24. As the connecting shaft 26 draws an arcuate movement trajectory centered on the support shaft 24 with the rotation of 25, the rear lid 13 is guided by guiding the rear portion of the rear lid 13 along the moving trajectory of the connecting shaft 26. In a stable state, the keyboard part 2 can be moved obliquely downward from the rear upper part to the rear part, whereby the rear lid 13 can be erected in the instrument case 1 satisfactorily.

  That is, the rear support guide member 18 has an arc-shaped movement locus in which the connecting shaft 26 is centered on the support shaft 24 as the arm portion 25 rotates in the vertical direction about the support shaft 24 of the support plate 23. Since this is a link mechanism that guides the rear part of the rear lid 13 along the movement trajectory of the connecting shaft 26, the rear part of the rear lid 13 can be moved along a uniform movement trajectory. Instability factors can be eliminated, and a simple structure and a low price can be provided as compared with the case of using a rack or pinion gear as in the conventional example.

  In addition, the rear support guide member 18 includes a spring member 27 that is a biasing member that constantly biases the rear portion of the rear lid 13 in the upward direction. Since the opening / closing operation can always be stabilized continuously, the front lid 12 and the rear lid 13 can be smoothly moved, so that the keyboard lid 3 can be opened and closed safely and satisfactorily.

  That is, when the keyboard lid 3 is moved rearward and opened, the rear cover 13 moves obliquely downward from the rear upper part of the keyboard part 2 to the rear and rises. By adding to the rear part of 13, it is possible to prevent the rear lid 13 from dropping rapidly due to its weight. Further, when the keyboard lid 3 is moved forward and closed, the spring force of the spring member 27 is applied to the rear lid even if the weight of the rear lid 13 is applied to the arm portion 25 when the rear lid 13 is lifted up. The rear lid 13 can be pulled up with a light force by adding the rear portion 13 to push up.

  The intermediate support member 17 is a connecting body that connects the rear shaft portion 28 that is a movable body that moves along the common guide portion 15 and the rear shaft portion 28 to the lower surface of the rear lid 13 so as to be able to contact and separate. A connecting member 29 and a displacement member 34 that biases the rear shaft portion 28 in a direction away from the lower surface of the rear lid 13 and relatively displaces the distance between the rear shaft portion 28 and the lower surface of the rear lid 13. Since it is provided, even if the front lid 12 and the rear lid 13 are connected to be able to be bent at the hinge 14, they are provided on the front shaft portion 22 and the rear lid 13 of the front support member 16 provided on the front lid 12. The rear shaft portion 28 of the intermediate support member 17 can be well guided by the single common guide portion 15.

  That is, when the keyboard lid 3 is opened, when the front lid 12 and the rear lid 13 are continuously flattened and lifted from a state inclined slightly forward and downward to a substantially horizontal state, the rear shaft portion is moved by the displacement member 34. 28 is displaced in a direction away from the lower surface of the rear lid 13, the rear portion of the front lid 12 and the front portion of the rear lid 13 can be moved to the upper side of the common guide portion 15 without being bent by the hinge 14. The front shaft portion 22 of the front lid 12 and the rear shaft portion 28 of the rear lid 13 can be satisfactorily guided by the single common guide portion 15, and the front lid 12 and the rear lid 13 are stably moved. be able to.

  Therefore, even if the length of the front lid 12 in the front-rear direction is shorter than the length of the rear lid 13 in the front-rear direction, one front shaft portion 22 of the front lid 12 and one rear shaft portion 28 of the rear lid 13 are provided. Can be satisfactorily guided by the common guide portion 15, and the rear lid 13 can be rotated by a small turn by the rear side support guide member 18, so that the front lid 12 is in a substantially horizontal state in the instrument case 1. Even when stored, the storage space in the front-rear direction in the instrument case 1 located behind the keyboard portion 2 can be made sufficiently small to be approximately the same as the length of the front lid 12 in the front-rear direction. The depth of the instrument can be shortened, and the overall musical instrument can be reduced in size.

  Further, the displacement member 34 of the intermediate support member 17 elastically moves the rear shaft portion 28, which is a moving body, to the lower surface of the rear lid 13 when the front lid 12 and the rear lid 13 are closed and covered above the keyboard portion 2. When the front lid 12 and the rear lid 13 are opened, the rear shaft portion 28 is elastically pulled away from the lower surface of the rear lid 13 to move the rear lid 13 downward. Since the front member is a spring member that gradually displaces upward, when the keyboard cover 3 is closed, the front cover 12 and the rear cover 13 can be made to continue in a substantially flat shape and tilted slightly forward. Thus, the keyboard portion 2 can be satisfactorily covered, and when the keyboard lid 3 is opened, even if the movement trajectories of the front lid 12 and the rear lid 13 are different, the front shaft portion 22 and the rear shaft portion 28. The intermediate support member 17 supports the front part of the rear lid 13 while guiding the It can be satisfactorily support the rear of the front lid 12.

  In the above-described embodiment, the case where the rear portion of the rear lid 13 is guided while being supported only by the rear support guide member 18 is described. However, the present invention is not limited to this. For example, the first modification shown in FIG. You may comprise as follows. That is, in the first modification, the pinion gear 40 is rotatably attached to the intermediate portion of the arm portion 25 of the rear support guide member 18 and extends from the rear upper portion of the keyboard portion 2 to the rear lower portion of the keyboard portion 2. A semicircular arc-shaped rack 41 is provided, and a pinion gear 40 is engaged with the rack 41.

  If comprised in this way, when the arm part 25 rotates centering on the support shaft 24, the pinion gear 40 meshes with the rack 41 and rolls together with the arm part 25, so the rear part of the rear lid 13 is moved to the arm part 25. And the rear portion of the rear lid 13 can be guided by the pinion gear 40 and the rack 41, and the rear lid 13 can be further stabilized and moved in the vertical direction.

  In this case, the pinion gear 40 is configured such that a damper member 42 is provided on the shaft 40a, and the damper member 42 applies a load to the rotation of the pinion gear 40 to brake the rotation of the pinion gear 40. desirable. With this configuration, when the pinion gear 40 meshes with the rack 41 and rolls together with the rotation of the arm portion 25, the rotation of the pinion gear 40 is braked by the damper member 42, so that the keyboard lid 3 is opened and closed. The keyboard cover 3 can be prevented from operating suddenly.

  Further, in the above-described embodiment and the first modification thereof, when the keyboard cover 3 is opened from the closed state, the rear shaft 28 of the intermediate support member 17 moves along the common guide portion 15 by the displacement member 34. The case where the front lid 12 and the rear lid 13 are integrally moved and guided by displacing in the direction in which they are in contact with and away from the lower surface of the rear lid 13 has been described. For example, you may comprise like the 2nd modification shown in FIG.

  The second modification is configured to include a guide support portion 45 that guides the front portion of the rear lid 13 when the keyboard lid 3 is opened and closed. The guide support portion 45 includes a front support inclined portion 46 that supports the rear lid 13 by tilting it slightly forward when the keyboard lid 3 is closed, and the rear lid 13 when the keyboard lid 3 is opened and closed while being bent by the hinge 14. The rear support inclined portion 47 is supported by inclining slightly downward and rearward, and the front support inclined portion 46 and the rear support inclined portion 47 are continuous in a mountain shape.

  With this configuration, when the keyboard lid 3 is opened from the closed state, the rear shaft portion 28 of the intermediate support member 17 moves along the common guide portion 15 and is moved to the lower surface of the rear lid 13 by the displacement member 34. Since the rear cover 13 is guided by the guide support portion 45, the load applied to the hinge 14 can be reduced, and the keyboard cover 3 can be moved smoothly and satisfactorily. Can do.

It is sectional drawing which showed the state which opened the keyboard cover in one Embodiment which applied this invention to the keyboard musical instrument. It is the enlarged plan view which showed the principal part of the keyboard musical instrument in the one side part of the keyboard part of FIG. It is sectional drawing of the keyboard instrument which showed the state which closed the keyboard cover of FIG. It is sectional drawing which showed the principal part in the AA arrow of FIG. It is the side view which showed the keyboard cover of FIG. FIG. 6 is a rear view of the main part showing the keyboard cover of FIG. 5. FIG. 7 is an enlarged back view showing the intermediate support member of FIG. 6. FIGS. 7A and 7B show cross sections of the intermediate support member as viewed from the direction indicated by arrows B-B in FIG. 7. FIG. 7A shows the rotating foot pivoted about the hinge by the spring force of the displacement member and opened at right angles to the mounting plate. FIG. 4B is an enlarged cross-sectional view showing a state in which the rotating foot part rotates around the hinge part against the spring force of the displacement member and approaches the mounting plate. FIG. 4 is a cross-sectional view of the keyboard instrument showing a state where the front portion of the front lid is pulled up in the state of FIG. 3. FIG. 10 is a cross-sectional view of the keyboard instrument showing a state in which the keyboard lid is moved backward in the state of FIG. It is sectional drawing of the keyboard musical instrument which showed the 1st modification which provided the rack and pinion gearwheel in the rear side support guide member. It is sectional drawing of the keyboard musical instrument which showed the 2nd modification which provided the guide support part in the intermediate support member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Musical instrument case 2 Keyboard part 3 Keyboard cover 12 Front cover 13 Back cover 14 Hinge 15 Common guide part 16 Front side support member 17 Intermediate support member 18 Rear side support guide member 22 Front side shaft part 24 Support shaft 25 Arm part 26 Connection shaft 27 Spring Member 28 Rear shaft portion 29 Connecting member 30 Mounting plate 31 Rotating foot portion 32 Hinge portion 34 Displacement member

Claims (5)

In the keyboard lid opening and closing device, the front lid and the rear lid are foldably connected by a connecting portion to constitute a keyboard lid, and the keyboard lid is closably opened and closed by the keyboard lid.
A common guide portion provided in the instrument case along the front-rear direction of the keyboard portion;
A front support member that supports the front part of the front lid so as to be movable in the front-rear direction of the keyboard part along the common guide part;
An intermediate support that supports the front part of the rear cover adjacent to the rear part of the front cover so as to be movable in the front-rear direction of the keyboard part along the common guide part and is displaced in the vertical direction in accordance with the movement of the rear cover. Members,
A rear support guide member that moves the rear part of the rear cover obliquely downward from the upper rear part of the keyboard part to the rear when the keyboard cover is opened, and raises the rear cover in the instrument case. A keyboard lid opening and closing device characterized by that.   The rear support guide member includes a support shaft provided in the instrument case, an arm portion having one end portion rotatably attached to the support shaft in the vertical direction, the other end portion of the arm portion, and the rear portion. A connecting shaft that connects the rear portion of the lid so as to be rotatable in the vertical direction, the arm portion rotates in the vertical direction around the support shaft, and the connection shaft is moved to the support shaft as the arm portion rotates. 2. A keyboard lid opening and closing device according to claim 1, wherein an arcuate movement trajectory centered at the center of the rear cover is drawn along the arcuate movement trajectory.   3. The keyboard lid opening and closing device according to claim 2, wherein the rear support guide member includes a biasing member that constantly biases the rear portion of the rear lid in a direction to push up.   The intermediate support member moves along the common guide portion, a connecting body that connects the moving body to a lower surface of the rear lid, and a moving body that moves away from the lower surface of the rear lid. The keyboard lid opening and closing device according to claim 1, further comprising a displacement member that biases in a direction to relatively displace the distance between the moving body and the lower surface of the rear lid.   When the front cover and the rear cover cover and close the upper part of the keyboard part, the displacement member makes the movable body elastically approach the lower surface of the rear cover so that the front part of the rear cover is lowered. A spring member that is displaced laterally and when the front lid and the rear lid are opened, the moving body is elastically pulled away from the lower surface of the rear lid, and the front portion of the rear lid is gradually displaced upward. The keyboard lid opening and closing device according to claim 4.

Images