JP2007102045A - Opening/closing mechanism for keyboard lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly open and close a keyboard lid with a simple structure and to obtain a small-sized musical instrument case. <P>SOLUTION: An opening/closing mechanism includes a first guide part 15 which guides a front lid 12 in the front-rear directions of a keyboard part 2 and supports a rear part side of the front lid 12 during its movement when the keyboard lid 3 having the front lid 12 and a rear lid 13 connected and folded with a hinge 14 is opened or closed and a second guide part 16 which guides the rear lid 13 folded with the hinge 14 obliquely downward to raise it when the keyboard lid 3 is opened. Therefore, even when the keyboard lid 3 is so constituted that the front lid 12 and rear lid 13 can be folded, an auxiliary mechanism is not necessary unlike a conventional example and when the keyboard lid 3 is opened and closed, the front lid 12 can smoothly be guided in a stabile state with the simple structure while having its rear part side supported. The front lid 12 and rear lid 13 are nearly same in size and the front lid 12 can be made shorter than the rear lid 13, so compact storage of the keyboard lid 3 can be allowed for to achieve the miniaturization of the whole musical instrument case 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a keyboard lid opening / closing mechanism in 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. The keyboard cover is configured to be bendable at the part, and the keyboard part provided in the instrument case is covered with the keyboard cover so that the keyboard part can be opened and closed, thereby opening the keyboard cover and exposing the keyboard part. When the front lid and the rear lid are folded at the connecting part and stored in the instrument case, and when the keyboard lid is pulled out from the instrument case and closed, the front lid and the rear lid are continuously flat. Some are configured to cover the upper part of the keyboard.
JP-A-10-198339

  The keyboard lid opening / closing mechanism in such a keyboard instrument is such that when the front lid is moved from the front side to the rear side of the keyboard portion when the keyboard lid is housed in the instrument case, the rear lid is bent at the connecting portion. When moving to the rear of the keyboard and the front lid is stored in the instrument case, the rear end of the rear lid is lowered and stored with the rear lid upright. Since the rear portion of the front lid is in an unstable state when bent at the portion, the rear portion of the front lid is configured to be supported by an auxiliary mechanism.

  That is, this auxiliary mechanism is provided with a support plate that supports the rear portion of the front lid in the musical instrument case so as to be pivotable in the front-rear direction, and the front lid moves in the opening direction so that the rear lid begins to bend at the connecting portion. When the front cover is supported by the upper end of the support plate, and the front cover is further moved in this state, the support plate is rotated backward while moving the front cover. By continuing to support the rear part, the lowering of the rear part of the front lid is restricted, and when the keyboard lid is closed, the front plate is supported in the state that the support plate supports the front lid as the front lid moves. The support plate is configured to continue to support the rear portion of the front cover while rotating toward the front, and the support plate is separated from the front cover when the keyboard cover is completely closed.

  However, in such a conventional keyboard lid opening / closing mechanism, when the keyboard lid is housed in the instrument case, the rear portion of the front lid must be supported by an auxiliary mechanism which is a movable portion in accordance with the operation of the front lid. In addition, it is necessary that the support plate of the auxiliary mechanism is rotatably provided in the musical instrument case so that the support plate of the auxiliary mechanism does not hinder the movement of the back cover. Must always be supported by a support plate, and the support plate must be separated from the front lid when the keyboard lid is closed.

  For this reason, this conventional keyboard lid opening / closing mechanism requires not only subtle accuracy when mounting the support plate of the auxiliary mechanism and its assembly, but also requires the installation location of the auxiliary mechanism and the operating range of the auxiliary mechanism. Therefore, a large space is required for installing the auxiliary mechanism in the musical instrument case, and there is a problem that the entire musical instrument case increases in size. In particular, the movement of the entire keyboard lid is created by supporting the rear part of the front lid with the support plate of the auxiliary mechanism. Therefore, when dividing the keyboard lid, the front lid must be made longer than the rear lid. For this reason, there is a problem in that the movement distance in the front-rear direction of the front lid becomes longer, which also increases the size of the entire instrument case.

  The problem to be solved by the present invention is to provide a keyboard lid opening / closing mechanism that can open and close the keyboard lid smoothly with a simple structure and can further reduce the size of the instrument case. is there.

In order to solve the above problems, the present invention includes the following components.
In addition, the reference numerals of the drawings attached to the respective elements described in the section of each embodiment described later are attached to the respective constituent elements together with parentheses.

1 to 12, the front lid (12) and the rear lid (13) are connected to each other by a connecting portion (hinge 14) so that they can be bent. In the keyboard lid opening / closing mechanism that covers the keyboard portion (2) provided in the instrument case (1) with the keyboard lid so as to be freely opened and closed,
A first guide portion (15) for guiding the front lid in the front-rear direction of the keyboard portion when opening and closing the keyboard lid, and supporting the rear side of the front lid when the front lid moves; and the keyboard A second guide portion (16) for standing the rear lid by guiding the rear lid bent at the connecting portion when opening the lid from the rear side of the keyboard portion obliquely downward; and provided in the second guide portion A holding portion (17) that prevents the rear end of the rear lid from moving when the rear lid is in an upright state and rotatably holds the rear end of the rear lid; A keyboard lid opening / closing mechanism provided with a stopper portion (18) provided on the rear surface of the rear lid so that the front end portion of the rear lid elastically contacts when the rear lid stands upright and tilts backward. It is.

  As shown in FIGS. 1 to 12, the invention according to claim 2 is characterized in that the first guide portion (15) includes a guide shaft portion (20) provided at a front end portion of the front lid (12), and A front lid guide member (21) provided on both side surfaces in the instrument case (1) for guiding both ends of the guide shaft portion along the keyboard portion (2), and when the front lid moves The keyboard lid opening / closing mechanism according to claim 1, further comprising a guide support portion (22) for supporting a lower surface side of the front lid.

  As shown in FIGS. 1 to 12, the invention according to claim 3 is a slide that slides on the guide support portion (22) when the front lid moves to the lower surface of the front lid (12). The keyboard lid opening / closing mechanism according to claim 2, further comprising a moving member (24).

  As shown in FIGS. 1 to 12, the rear cover (13) is erected on the front lid guide member (21) and tilted rearward to contact the stopper portion (18). An auxiliary stopper portion (30) is provided for restricting the forward movement of the guide shaft portion (20) when the front lid (12) is housed in the instrument case (1) in contact. The keyboard lid opening / closing mechanism according to claim 2 or 3, wherein the keyboard lid opening / closing mechanism is provided.

  1 to 12, the second guide portion (16) includes a pinion (25) provided at a rear end portion of the rear lid (13), and the A rack (26) provided on a side surface in the musical instrument case (1) and engaged with the pinion and rolling, and a state in which the rear cover is raised by guiding the pinion obliquely up and down along the rack. The keyboard lid opening / closing mechanism according to any one of claims 1 to 4, further comprising a pinion guide groove (27) stored in the instrument case (1).

  As shown in FIGS. 9 to 12, the invention described in claim 6 is provided with a damper member (36) for reducing the weight of the rear lid (13). 5. A keyboard lid opening / closing mechanism according to any one of 5).

  According to the first aspect of the present invention, the front lid is guided in the front-rear direction of the keyboard portion in the musical instrument case when the front lid and the rear lid are opened and closed by the coupling portion so as to be bent. A first guide portion that supports the rear side of the front lid when the front lid moves, and a rear lid that guides the rear lid that is bent at the connecting portion when the keyboard lid is opened, obliquely downward from the rear of the keyboard portion. And the second guide part that stands up, the front cover can be guided while the rear part of the front cover is supported by the first guide part when the keyboard cover is opened. The rear lid can be stored in the musical instrument case in a state where the rear lid is guided and directed obliquely downward. For this reason, even if the keyboard lid has a configuration in which the front lid and the rear lid are connected so that they can be bent at the connecting portion, it does not require a movable portion like the auxiliary mechanism of the conventional example, and has a simple structure, By restricting the lowering of the rear part of the front lid at the time of opening and closing, the keyboard lid can be smoothly opened and closed in a stable state.

  Further, when the keyboard lid is stored in the instrument case, the rear end of the rear lid is rotatably held by the holding portion provided in the second guide portion with the rear lid standing upright. The rear lid can support the rear end portion of the front lid, and thus the rear end portion of the front lid can be stably supported even when the front lid is separated rearward from the guide support portion. When closing the keyboard lid, the rear lid that stands up pivots forward around the holding portion while supporting the rear end portion of the front lid, so that the keyboard lid can be pulled out smoothly. Also, when the rear lid stands upright and tilts backward, the front end of the rear lid elastically contacts the stopper provided on the rear surface of the instrument case, so that when the keyboard lid is stored in the instrument case Thus, the rear lid can be held in a fixed state tilted rearward, whereby the keyboard cover can be satisfactorily stored in the instrument case in a stable and constant state.

  Thus, according to the first aspect of the present invention, when the keyboard lid is opened and closed, the first guide portion regulates the front lid before and after the keyboard portion in a state where the front lid is stabilized while restricting the lowering of the rear side of the front lid. Since the front lid and the rear lid are approximately the same size, or the front lid can be formed shorter than the rear lid, the distance between the front lid and the rear lid in the front-rear direction can be shortened. In addition, the front lid and the rear lid can be accommodated in the instrument case in a compact manner, thereby further reducing the overall size of the instrument case.

  According to the second aspect of the present invention, the first guide portion is provided on the guide shaft portion provided at the front end portion of the front lid and on both side surfaces in the instrument case, and both ends of the guide shaft portion are used as the keyboard portion. A front cover guide member that guides along and a guide support portion that supports the lower surface side of the front cover when the front cover moves, so that the guide shaft portion of the front cover is provided in front of the instrument case. Since the guide is guided along the lid guide member, the front lid can be moved in a stable and almost constant state, and when the front lid moves, the rear portion of the front lid is reliably supported by the guide support portion. Thus, with a simple structure that does not require a movable part, the lowering of the rear part of the front lid can be regulated, and the front lid can be opened and closed well in a stable and almost constant state.

  In this case, for example, the guide support portion is continuously formed in a mountain shape that gently rises from a location corresponding to the substantially middle portion of the keyboard portion to a rear end portion of the keyboard portion, and the keyboard lid is closed. If the front end portion of the mountain-shaped guide support portion is positioned near the rear end portion of the front lid when in the state, the rear lower surface side of the rear portion of the front lid is moved when the front lid is moved in the opening direction. It can be quickly supported by the guide support portion, whereby the front lid can be moved well in a stable state.

  According to the third aspect of the present invention, the rear portion of the front lid is provided with a guide support on the lower surface of the front lid by the sliding member that slides on the guide support portion when the front lid moves. Since the sliding member provided on the lower surface of the front lid slides on the guide support portion when moving while being supported by the portion, the front lid has good operability and moves the front lid smoothly and satisfactorily. be able to.

  In this case, in particular, if the sliding member is formed in an inclined portion whose front and rear portions are inclined obliquely upward, and is formed in a sled shape as a whole, when the front lid moves, the front portion and the rear portion Since either of the inclined portions rides while smoothly contacting the guide support portion, the front lid can be smoothly moved while being supported by the guide support portion. Further, the sliding member is provided with a sliding member in which a cushion material having a non-repulsive force or a low repulsive force is covered with, for example, a slippery resin sheet, and the sliding member is brought into contact with the guide support portion for sliding. If it is moved, the generation of abnormal noise and vibration can be prevented, and the front lid can be moved more smoothly and satisfactorily.

  According to the fourth aspect of the present invention, when the front lid is stored in the musical instrument case with the rear lid standing on the front lid guide member, tilted rearward and in contact with the stopper portion, the guide shaft portion By providing an auxiliary stopper that restricts the forward movement of the instrument, the front end of the rear lid is placed on the stopper provided on the rear surface of the instrument case with the rear lid standing and tilted rearward. Even if it is made to contact elastically, the auxiliary stopper portion can restrict the forward movement of the guide shaft portion, so that it is possible to prevent the keyboard lid from moving in the direction of self-closing. Safety can be increased.

  According to the fifth aspect of the present invention, the second guide portion includes a pinion provided at the rear end portion of the rear lid, a rack provided on a side surface in the instrument case and meshed with the pinion, and the pinion. And a pinion guide groove that is housed in the instrument case in a state where the back cover is raised while being guided obliquely up and down along the rack, so that when the keyboard cover is opened, the back cover is bent at the connecting portion. Since the rear cover can be guided obliquely upward to be almost parallel to the front cover when the keyboard cover is closed, the keyboard cover can be The rear lid can be moved in a stable and almost constant state when the keyboard is opened and closed, and this also allows the entire keyboard lid to be opened and closed smoothly and satisfactorily.

  According to the invention described in claim 6, when the damper member for reducing the weight of the rear cover is provided, when the rear cover is moved obliquely downward to stand up, the weight of the rear cover is increased. Can be prevented from moving suddenly, and even when the rear lid is stood up, it can be lifted with a light force when pulling up the rear lid, which keeps the keyboard lid almost constant. Since it can be opened and closed in a stable state with the force of, it is possible to obtain a more convenient one.

(Embodiment 1)
A first embodiment in which the present invention is applied to a keyboard instrument will be described below with reference to FIGS.
As shown in FIGS. 1 to 4, the keyboard instrument has a keyboard part 2 disposed on the front side (left side in FIG. 1) in the instrument case 1, and a keyboard cover 3 is provided on the upper side of the keyboard part 2 so as to be freely opened and closed. It has been configured.

  The musical instrument case 1 includes a bottom plate 4 as shown in FIGS. A front plate 5 is erected at a front end portion (left end portion in FIG. 1) of the bottom plate 4, and a rear plate 6 is erected at a 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, in the direction of the front and back surfaces of the paper), and between the rear portions at the top of these side plates 4 (between the right side in FIG. 1) A plate 8 is mounted on the upper end portion of 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 to 4, the keyboard unit 2 includes a plurality of keys 10 such as white keys and black keys arranged on a keyboard chassis 11, and the plurality of keys 10 includes a front plate 5 and a top plate 8. Is provided on the bottom plate 4 in the musical instrument case 1 with the upper side exposed to the outside. 1 to 4, the keyboard lid 3 is divided into a front lid 12 and a rear lid 13, and the front lid 12 and the rear lid 13 are connected so as to be bent by a hinge 14 as a connecting portion. In this state, the instrument case 1 is provided on the upper side of the instrument case 1 so as to be movable in the front-rear direction.

  That is, as shown in FIGS. 1 to 4, the opening / closing mechanism of the keyboard lid 3 guides the front lid 12 in the front-rear direction of the keyboard portion 2 when the keyboard lid 3 is opened and closed and moves the front lid 12. A first guide portion 15 that supports the rear side (right side in FIG. 1) of the front lid 12 and a rear lid 13 that is guided obliquely downward from the rear of the keyboard portion 2 when the keyboard lid 3 is opened. 4 and a second guide portion 16 for raising the rear lid 13 as shown in FIG. 4 when the rear lid 13 is standing and is provided on the second guide portion 16. A holding part 17 that prevents the movement of the lower end of the rear cover 13 (in FIG. 4, the lower end side) and a rear cover 13 provided on the inner surface of the rear plate 6 of the musical instrument case 1 are provided. When standing and tilting backward, the front end portion (upper end portion in FIG. 4) of the rear lid 13 is elastically contacted as shown in FIG. That and a stopper portion 18.

  In this case, as shown in FIGS. 1 to 6, the first guide portion 15 is respectively provided on the guide shaft portion 20 provided at the front end portion of the front lid 12 and the inner surface of the side plate 7 located on both sides of the instrument case 1. A front cover guide member 21 (only one of them is shown in FIGS. 1 to 4) that guides both ends of the guide shaft part 20 in the front-rear direction along the keyboard part 2, and a front cover when the front cover 12 moves. 12 is provided with a guide support portion 22 that supports the lower surface side of 12.

  That is, as shown in FIGS. 1 to 5, the guide shaft portion 20 is provided at the lower end portion of the front cover 23 provided at the front end portion of the front lid 12, and both sides thereof protrude from both sides of the front lid 12. Each protruding end portion 20a (only one of them is shown in FIG. 5) is configured to be guided along the front lid guide member 21. As shown in FIG. 5, the front cover 23 is provided with notches 23 a for avoiding the guide support portion 22 at both end portions (only one side is shown in FIG. 5).

  As shown in FIGS. 5 and 6, the front lid guide member 21 is a plate-like member provided with a guide groove portion 21 a into which the end portion 20 a of the guide shaft portion 20 is movably inserted. As shown in the figure, the keyboard part 2 is provided so as to be embedded in the inner surface of the side plate 7 of the musical instrument case 1 from the front end part to the rear end part of the keyboard part 2 along the upper part thereof. As shown in FIG. 6, the guide support portion 22 is provided integrally with the upper end portion of the front lid guide member 21 in a state of protruding from the inner surface of the side plate 7 of the instrument case 1, and the front support 12 is moved forward. It is comprised so that the rear part lower surface side of the lid | cover 12 may be supported.

  That is, as shown in FIGS. 1 to 4, the guide support portion 22 is located between the upper portion corresponding to the substantially middle portion of the keyboard portion 2 and the upper portion corresponding to the rear end portion of the keyboard portion 2. It is continuously provided in a mountain shape that rises gently. In this case, as shown in FIG. 1 to FIG. 4, the guide support portion 22 has a front slope 22 a that gently rises on the front side, that is, the front lid 12 and the rear lid 13 when the keyboard lid 3 is closed. It is formed on a slope with substantially the same slope as the slope, and is formed on a rear slope 22b that gently descends on the rear side. Thereby, as shown in FIG. 1, the guide support portion 22 has a rear end portion of the front lid 12 that is separated from the vicinity of the front inclined surface 22 a of the guide support portion when the keyboard lid 3 is closed. The front lower surface is supported by the front inclined surface 22a, and the rear lower surface of the front lid 12 is supported by either the front inclined surface 22a or the rear inclined surface 22b when the front lid 12 moves. Yes.

  Moreover, as shown in FIGS. 1-4, the sliding member 24 (only one side is shown in FIGS. 1-4) which slides on the guide support part 22 as shown in FIGS. Is provided. As shown in FIGS. 7A to 7C, the sliding member 24 is formed in inclined portions 24a and 24b in which the front side and the rear side are inclined obliquely upward, respectively. As shown in FIG. 6, it is attached to the lower surface on the rear side of the front lid 12 with a screw 24c, and is configured to slide smoothly on the guide support portion 22.

  On the other hand, as shown in FIGS. 1 to 4, the second guide portion 16 includes a pinion 25 provided at the rear end portion (the right end portion in FIG. 1) of the rear lid 13 and each of the pinion 25 located on both sides of the instrument case 1. A rack 26 provided on the inner surface of the side plate 7 and meshed with the pinion 25 and rolling, and the pinion 25 is guided along the rack 26 obliquely in the vertical direction and stored in the instrument case 1 with the rear lid 13 standing upright. And a pinion guide groove 27 for the purpose. In this case, as shown in FIG. 8, the pinion 25 is integrally provided at both ends of the pinion shaft 28 (only one side is shown in FIG. 8). The pinion shaft 28 is shown in FIGS. Thus, it is rotatably attached to the attachment plate 29 attached to the rear end portion of the rear lid 13.

  As shown in FIGS. 1 to 4, the rack 26 has a tooth portion with which the pinion 25 meshes curved in an arc shape along the rear side of the keyboard portion 2 from the upper side corresponding to the rear portion of the keyboard portion 2, and the lower side thereof is the keyboard. It is formed substantially vertically toward the lower rear part of the part 2. As shown in FIGS. 1 to 4, the pinion guide groove 27 is a groove in which each end portion 28 a of the pinion shaft 28 is movably inserted along the rack 26, and is formed in a curved shape along the rack 26. A holding portion 17 is integrally provided at the lower end portion. As shown in FIG. 4, the holding portion 17 is in contact with the end portion 28a of the pinion shaft 28 when the rear lid 13 is in a standing state. And the rear end of the rear lid 13 is rotatably held.

  The stopper portion 18 is made of a cushioning material such as a non-repulsive / low-repulsive cushion or rubber, for example, and is provided on the inner surface of the rear plate 6 of the instrument case 1 as shown in FIGS. Then, as shown in FIG. 4, the front end portion (upper end portion in FIG. 4) of the rear lid 13 abuts elastically when tilted rearward, thereby holding the rear lid 13. In this case, the guide shaft portion 20 of the front lid 12 moves forward on the front lid guide member 21 of the first guide portion 15 when the rear lid 13 stands and abuts against the stopper portion 18 in a state of being inclined rearward. An auxiliary stopper portion 30 is provided for restricting the movement to. The auxiliary stopper portion 30 is a step portion provided in the guide groove portion 21a of the front lid guide member 21, and is configured to lock the end portion 20a of the guide shaft portion 20 of the front lid 12 at this step portion. ing.

Next, the opening / closing operation of the keyboard lid 3 will be described with reference to FIGS.
First, as shown in FIG. 1, when the keyboard lid 3 is in a closed state, the front lid 12 and the rear lid 13 are not bent by the hinge 14 and cover the upper portion of the keyboard portion 2 continuously in a substantially flat shape. At this time, the end portion 20 a of the guide shaft portion 20 provided at the front portion of the front lid 12 is positioned at the front end portion of the guide groove portion 21 a in the front lid guide member 21 of the first guide portion 15.

  At this time, the pinion 25 provided at the rear end portion of the rear lid 13 is positioned at the upper end portion of the rack 26 of the second guide portion 16, and the end portion 28 a of the pinion shaft 28 is positioned at the upper end portion of the pinion guide groove portion 27. Located in. The lower surface of the front lid side of the rear lid 13 is positioned on the front slope 22 a of the guide support portion 22 of the first guide portion 15, whereby the front side of the rear lid 13 is supported by the guide support portion 22. . Further, the front lid 12 is approached in a state where the rear end portion thereof is slightly separated from the front inclined surface 22 a of the guide support portion 22 to the front side.

  In this state, when the front cover 23 of the front lid 12 is lifted and the keyboard lid 3 is pushed toward the instrument case 1, the end portion 20a of the guide shaft portion 20 of the front lid 12 is first as shown in FIG. The movement starts along the guide groove portion 21a of the front lid guide member 21 of the guide portion 15. At the same time, the pinion 25 of the rear lid 13 starts rolling along the rack 26 of the second guide portion 16, and the end portion 28 a of the pinion shaft 28 also starts moving along the pinion guide groove portion 27.

  At this time, as shown in FIG. 2, the inclined portion 24 b on the rear side of the sliding member 24 provided on the lower surface of the front lid 12 moves onto the front inclined surface 22 a in the guide support portion 22 of the first guide portion 15. The rear portion of the front lid 12 is supported by the guide support portion 22, the lower surface of the front portion of the rear lid 13 moves to the rear inclined surface 22 b of the guide support portion 22, and the front portion of the rear lid 13 is the guide support portion 22. Supported. In this state, the rear lid 13 is slightly bent at the hinge 14, and the rear lid 13 is gently inclined downward.

  Thereafter, when the keyboard lid 3 is further pushed toward the instrument case 1, the end portion 20a of the guide shaft portion 20 of the front lid 12 extends along the guide groove portion 21a of the front lid guide member 21 as shown in FIG. It moves further back. Accordingly, the pinion 25 of the rear cover 13 rolls obliquely downward along the rack 26 of the second guide portion 16, and the end portion 28 a of the pinion shaft 28 also moves obliquely downward along the pinion guide groove portion 27. To do.

  At this time, as shown in FIG. 3, the rear lid 13 moves rearward from the guide support portion 22 of the first guide portion 15, so that the rear lid 13 moves while being inclined obliquely downward while being bent by the hinge 14. The sliding member 24 provided on the lower surface of the lid 12 moves onto the rear slope 22 b of the guide support portion 22 of the first guide portion 15, and the rear portion of the front lid 12 is supported by the guide support portion 22. For this reason, although the front lid 12 is gently inclined to the rear lowering, the lowering of the rear of the front lid 12 is restricted by the guide support portion 22 and moves rearward in this state.

  When the keyboard lid 3 is further pushed into the instrument case 1, the pinion 25 of the rear lid 13 reaches the lower end of the rack 26 of the second guide portion 16, and the end 28a of the pinion shaft 28 is moved to the pinion. It reaches the holding portion 17 provided at the lower end portion of the guide groove portion 27 and is rotatably held. At this time, the front lid 12 moves rearward, the inclined portion 24 a on the front side of the sliding member 24 moves to the rear inclined surface 22 b of the guide support portion 22, and the rear portion of the front lid 12 is supported by the guide support portion 22. Thus, the lowering of the front lid 12 is restricted.

  In this state, when the keyboard lid 3 is further pushed into the instrument case 1, the rear lid 13 is moved backward with the end portion 28a of the pinion shaft 28 held by the holding portion 17 as shown in FIG. It turns and stands up. At this time, the front lid 12 further moves into the musical instrument case 1 and the sliding member 24 moves rearward from the guide support portion 22, but the rear portion of the front lid 12 is supported by the rear lid 13 that stands.

  Thereafter, when the front lid 12 is further pushed into the musical instrument case 1, the rear lid 13 rotates further rearward about the end portion 28a of the pinion shaft 28 held by the holding portion 17, as shown in FIG. Further, the rear lid 13 is tilted rearward, and the upper end portion of the tilted rear lid 13 is elastically contacted and held by a stopper portion 18 provided on the inner surface of the rear plate 6 of the musical instrument case 1. At this time, the end portion 20a of the guide shaft portion 20 of the front lid 12 is locked to the auxiliary stopper portion 30 provided at the rear portion of the guide groove portion 21a of the front lid guide member 21, and the forward movement of the front lid 12 is restricted. Is done. As a result, the front lid 12 is accommodated in the lower side of the top plate 8 substantially in parallel with the top plate 8, and the rear lid 13 is stood and stood in a tilted rear direction.

  Further, when the keyboard cover 3 thus housed is pulled out and the keyboard part 2 is closed, as shown in FIG. 4, the front cover 23 of the front cover 12 is lifted lightly and the auxiliary stopper part 30 of the first guide part 15 is lifted. The locking of the front lid 12 to the guide shaft portion 20 is released. In this state, when the front lid 12 is pulled out, the rear lid 13 which stands upright supports the rear portion of the front lid 2 and rotates toward the front side around the end portion 28a of the pinion shaft 28 held by the holding portion 17. Since it moves, the front lid 12 can be pulled out smoothly with a light force. Thereafter, the front lid 12 and the rear lid 13 perform operations opposite to those described above, and the keyboard lid 3 is closed to cover the upper portion of the keyboard portion 2 as shown in FIG.

  Thus, according to the opening / closing mechanism of the keyboard lid 3, when opening / closing the keyboard lid 3 in which the front lid 12 and the rear lid 13 are foldably connected by the hinge 14, the front lid 12 is placed inside the instrument case 1. A first guide portion 15 that guides the keyboard portion 2 in the front-rear direction and supports the rear side of the front lid 12 when the front lid 12 moves, and a rear lid 13 that is bent by a hinge 14 when the keyboard lid 3 is opened. By providing the second guide portion 16 that guides the keyboard portion 2 from the rear side obliquely downward and raises the rear lid 13, the front guide 12 is opened by the first guide portion 15 when the keyboard lid 3 is opened. The front lid 12 can be guided while supporting the rear portion, and the rear lid 13 can be guided obliquely downward by the second guide portion 16 and can be stored in the instrument case 1 in an upright state. .

  For this reason, even if the keyboard lid 3 has a configuration in which the front lid 12 and the rear lid 13 are connected so as to be bent by a hinge 14, it does not require a movable part as in the auxiliary mechanism of the conventional example, and has a simple structure. When the keyboard lid 3 is opened and closed, the lowering of the rear portion of the front lid 12 is restricted, and the keyboard lid 3 can be smoothly opened and closed in a stable state. In particular, when the keyboard lid 3 is opened and closed, the first guide portion 15 guides the front lid 12 in the front-rear direction while stabilizing the front lid 12 while restricting the lowering of the rear side of the front lid 12. The rear lid 13 can be formed to have substantially the same size as shown in FIGS. 1 to 4, or the front lid 12 can be formed shorter than the rear lid 13. For this reason, while being able to shorten the moving distance of both the front lid 12 and the rear lid 13 in the front-rear direction, the front lid 12 and the rear lid 13 can be stored compactly in the musical instrument case 1, Thereby, further downsizing of the entire instrument case 1 can be achieved.

  When the keyboard lid 3 is stored in the instrument case 1, the rear end portion of the rear lid 13 is rotatably held by the holding portion 17 provided in the second guide portion 16 with the rear lid 13 standing. Therefore, the rear end portion of the front lid 12 can be supported by the standing rear lid 13, and thus the rear end portion of the front lid 12 can be supported even when the front lid 12 is separated rearward from the guide support portion 22. In addition to being able to support it stably, when the keyboard lid 3 is pulled out and closed in this state, the upright rear lid 13 rotates around the holding portion 17 while supporting the rear end portion of the front lid 12, The keyboard lid 3 can be pulled out smoothly.

  Further, when the rear lid 13 stands up and tilts backward, the front end portion of the rear lid 13 elastically contacts the stopper portion 18 provided on the rear surface in the musical instrument case 1, so that the keyboard lid 3 is placed on the musical instrument case 1. As shown in FIG. 4, the rear lid 13 can be raised and held in a fixed state when it is housed inside, so that the keyboard cover 3 can be satisfactorily held in a stable and constant state. It can be stored in the case 1. In particular, the stopper portion 18 is formed of, for example, a cushioning material such as a non-repulsive / low-repulsive cushion or rubber, so that the surface of the rear lid 13 is not damaged, and the impact when the rear lid 13 abuts. Can be suppressed and the generation of impact sound can be suppressed.

  In this case, when the front lid 12 is housed in the musical instrument case 1 with the rear lid 13 standing upright and tilting rearward and in contact with the stopper portion 18, the front lid guide member 21 has the guide shaft portion 20. By providing the auxiliary stopper portion 30 that restricts the forward movement, the front end portion of the rear lid 13 is provided on the rear surface in the instrument case 1 in a state where the rear lid 13 stands upright and tilts backward. Even if the stopper portion 18 is merely elastically contacted, the auxiliary stopper portion 30 can restrict the forward movement of the guide shaft portion 20, so that the keyboard lid 3 is prevented from moving in the direction of self-closing. This can increase safety.

  The first guide portion 15 includes a guide shaft portion 20 provided at the front end portion of the front lid 12 and both end surfaces 20a of the guide shaft portion 20 provided on both side surfaces in the musical instrument case 1 so that the keyboard portion 2 , And a guide support portion 22 that supports the lower surface side of the front lid 12 when the front lid 12 moves, whereby the guide shaft portion 20 of the front lid 12 is provided. Since the front cover 12 is guided along the front cover guide member 21 of the musical instrument case 1, the front cover 12 can be moved in a stable and substantially constant state, and when the front cover 12 is moved, the front support 12 is moved forward by the guide support portion 22. The rear part of the lid 12 can be reliably supported, and by this, a simple structure that does not require a movable part, the lowering of the rear part of the front lid 12 is restricted, and the front lid 12 is stable and in a substantially constant state. Can be opened and closed.

  In this case, the guide support portion 22 is continuously formed in a mountain shape that gently rises from a portion corresponding to the substantially middle portion of the keyboard portion 2 to a portion corresponding to the rear end portion of the keyboard portion 2, and the keyboard lid 3 is The front end of the mountain-shaped guide support portion 22 is positioned in the vicinity of the rear end of the front lid 12 when the front lid 12 is closed. The sliding member 24 of the lid 12 can be quickly supported by the front inclined surface 22a of the guide support portion 22, and thus the front lid 12 can be favorably moved in a stable state.

  In this case, the lower surface of the front lid 12 is provided with a sliding member 24 that slides on the guide support portion 22 when the front lid 12 moves, so that the rear portion of the front lid 12 is the guide support portion 22. Since the sliding member 24 provided on the lower surface of the front lid 12 slides on the guide support portion 22 when moving while being supported by the front lid 12, the operability of the front lid 12 is good and the front lid is smoothly and satisfactorily good. 12 can be moved. In particular, when the front lid 12 moves, the sliding member 24 is formed in the inclined portions 24a and 24b whose front and rear portions are inclined obliquely upward, and is formed in a sled shape as a whole. Since either of the inclined portions 24 a and 24 b of the front portion and the rear portion ride on while smoothly contacting the guide support portion 22, the front lid 12 can be smoothly moved while being supported by the guide support portion 22.

  Further, in this keyboard lid 3 opening / closing mechanism, the second guide portion 16 is provided with a pinion 25 provided at the rear end portion of the rear lid 13 and a side surface inside the musical instrument case 1, and the pinion 25 is engaged to roll. And a pinion guide groove portion 27 that guides the pinion 25 obliquely up and down along the rack 26 and stores the rear lid 13 in an upright state, thereby opening the keyboard lid 3. The rear lid 13 can be smoothly guided in a diagonally downward direction to stand up, and when the keyboard lid 3 is closed, the rear lid 13 is smoothly guided in a diagonally upward direction to be parallel to the front lid 12. Therefore, when the keyboard lid 3 is opened and closed, the rear lid 13 can be moved in a stable and almost constant state, and the keyboard lid 3 as a whole can be opened and closed smoothly and satisfactorily.

(Embodiment 2)
Next, a second embodiment in which the present invention is applied to a keyboard instrument will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
The opening / closing mechanism of the keyboard lid 3 in this keyboard instrument is provided with a sliding member 35 on the sliding member 24 attached to the lower surface of the front lid 12 and a damper member for reducing the weight of the rear lid 13 in the instrument case 1. 36 is the same as the first embodiment except for this.

  That is, as shown in FIGS. 11 (a) to 11 (c), the sliding member 35 has a cushion material 38 with no repulsive force or low repulsive force at a counterbore provided on the lower end surface of the sliding member 24. The resin sheet 37 is covered with a slidable resin sheet 37, and the resin sheet 37 is provided on the lower end surface of the sliding member 24. As a result, the resin sheet 37 is guided and supported as shown in FIGS. It is configured to slide on the portion 22.

  As shown in FIGS. 9, 10, and 12, the damper member 36 includes a fixing member 39 provided on the bottom plate 4 of the musical instrument case 1 located behind the keyboard portion 2, and an upper portion of the fixing member 39. The arm part 41 is attached to the attachment pin 40 so as to be pivotable in the vertical direction, and the coil spring 42 is wound around the outer periphery of the attachment pin 40 and urges the arm part 41 to turn upward. The weight of the rear lid 13 is reduced by elastically contacting the tip of the arm portion 41 in the direction of pushing up the pinion shaft 28 by the spring force of the coil spring 42.

  According to such an opening / closing mechanism of the keyboard lid 3, since the sliding member 35 is provided on the sliding member 24 attached to the lower surface of the front lid 12, the rear portion of the front lid 12 is moved while being supported by the guide support portion 22. In this case, since the sliding member 35 of the sliding member 24 slides on the guide support portion 22, the operability of the front lid 12 is good and the front lid 12 can be moved smoothly. In this case, since the sliding member 35 is configured to cover the cushion material 38 having no repulsive force or low repulsive force with the resin sheet 37 having slipperiness, it is possible to prevent the cushion material 38 from being worn by the resin sheet 37. In addition, particularly when the sliding member 35 slides on the guide support portion 22, the resin sheet 37 and the cushion material 38 can prevent the generation of abnormal noise and vibration. The front lid 12 can be moved.

  Further, in the keyboard lid 3 opening / closing mechanism, the damper member 36 for reducing the weight of the rear lid 13 is provided, so that when the rear lid 13 is moved obliquely downward to stand up, the rear lid 13 can be prevented from suddenly moving due to its weight by the spring force of the coil spring 42 of the damper member 36, and even when the rear lid 13 is stood up, the rear lid 13 can be lifted. The spring force of the coil spring 42 of the damper member 36 can be pulled up with a light force. As a result, the keyboard lid 3 can always be opened and closed in a stable state with a substantially constant force, so that it is possible to obtain a safer and more user-friendly one.

  In the first or second embodiment, the guide support portion 22 is provided so as to protrude into the instrument case 1 above the front lid guide member 21 of the first guide portion 15, and the front lid 12 is placed on the guide support portion 22. Although the case where the sliding member 24 is configured to slide is described, the present invention is not limited to this. For example, the guide support portion is formed in a groove shape and embedded in the side plate 7 of the musical instrument case 1, and the front lid 12 You may comprise so that a part of sliding member attached to the lower surface may be slidably inserted and slid in a groove-shaped guide support part.

  Also in this case, the sliding member 35 may be provided on a part of the sliding member inserted into the groove-shaped guide support portion as in the second embodiment. With this configuration, in addition to the same effects as in the first or second embodiment, the guide support portion does not protrude into the instrument case 1 in particular, so that the guide support portion is not injured, and safety is ensured. You can get something expensive.

It is sectional drawing which showed the state which closed the keyboard cover in the keyboard musical instrument to which this invention is applied. (Embodiment 1) It is sectional drawing which showed the state which started opening the keyboard cover in FIG. FIG. 3 is a cross-sectional view showing a state where the keyboard lid is further opened in FIG. 2 and the rear lid is moved obliquely downward while being bent. FIG. 4 is a cross-sectional view showing a state in which the keyboard lid is completely opened in FIG. It is an expanded sectional view of the principal part in the AA arrow of FIG. It is an expanded sectional view of the principal part in the BB arrow view of FIG. The sliding member shown in FIGS. 1-4 is shown, (a) is the top view of the sliding member, (b) is the side view, (c) is the back view. It is an expanded sectional view of the principal part in CC arrow of FIG. It is sectional drawing which showed the state which opened the keyboard cover a little in the keyboard musical instrument to which this invention is applied. (Embodiment 2) FIG. 10 is a cross-sectional view showing a state where the keyboard lid is completely opened and the rear lid is erected and tilted backward in FIG. 9. 9 and 10 show the sliding member, wherein (a) is a plan view of the sliding member, (b) is a side view thereof, and (c) is a rear view thereof. It is the rear view which showed the damper member shown by FIG. 9 and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Musical instrument case 2 Keyboard part 3 Keyboard cover 12 Front cover 13 Rear cover 14 Hinge 15 1st guide part 16 2nd guide part 17 Holding part 18 Stopper part 20 Guide shaft part 21 Front cover guide member 22 Guide support part 22a Front side slope 22b Rear slope 24 Sliding members 24a, 24b Inclined portions at the front and rear portions 25 Pinion 26 Rack 27 Pinion guide groove portion 28 Pinion shaft 30 Auxiliary stopper portion 35 Sliding member 36 Damper member

Claims (6)

In the keyboard lid opening and closing mechanism, the front lid and the rear lid are connected to each other so that the keyboard lid can be bent by a coupling portion, and the keyboard lid provided in the instrument case is covered with the keyboard lid so as to be opened and closed.
A first guide portion that guides the front lid in the front-rear direction of the keyboard portion when opening and closing the keyboard lid and supports the rear side of the front lid when the front lid moves;
A second guide part that guides the rear cover that is bent at the connecting part when opening the keyboard cover, obliquely downward from the rear of the keyboard part, and raises the rear cover;
A holding portion that is provided in the second guide portion and prevents the rear end of the rear lid from moving when the rear lid is in a standing state, and rotatably holds the rear end of the rear lid;
A keyboard lid opening and closing comprising: a stopper portion provided on a rear surface of the instrument case, wherein the front end of the rear lid elastically contacts when the rear lid stands upright and tilts backward mechanism.   The first guide portion includes a guide shaft portion provided at a front end portion of the front lid and a front lid provided on both side surfaces in the instrument case for guiding both ends of the guide shaft portion along the keyboard portion. 2. The keyboard lid opening / closing mechanism according to claim 1, further comprising a guide member and a guide support portion that supports a lower surface side of the front lid when the front lid moves.   The keyboard lid opening / closing mechanism according to claim 2, wherein a sliding member that slides on the guide support portion when the front lid moves is provided on a lower surface of the front lid.   When the front lid is housed in the instrument case in a state where the rear lid stands upright and tilts backward and abuts against the stopper portion, the front lid guide member moves forward to the guide shaft portion. The keyboard lid opening / closing mechanism according to claim 2 or 3, further comprising an auxiliary stopper portion for restricting movement.   The second guide portion includes a pinion provided at a rear end portion of the rear lid, a rack provided on a side surface in the instrument case, the pinion meshing with the pinion, and the pinion along the rack. 5. A keyboard lid opening and closing device according to claim 1, further comprising: a pinion guide groove portion that is housed in the instrument case in a state in which the rear lid is raised while being guided obliquely in an up-down direction. mechanism. The keyboard lid opening / closing mechanism according to claim 1, further comprising a damper member for reducing the weight of the rear lid.

Images