JP2010211111A - Keyboard cover device for keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard cover device for keyboard instrument, which can smooth opening and closing operation of a keyboard cover while maintaining the depth dimension of an instrument body compact, and can provide a good appearance of the instrument body. <P>SOLUTION: The keyboard cover device 5 for keyboard instrument for opening and closing a playing part 4 in a piano body 1 having the playing part 4 including a keyboard 3 in the front includes: a main keyboard cover 23 which is formed of a single sheet-like member having a depth dimension smaller than that of the playing part 4, and is provided to be longitudinally slidable between a close position for closing the playing part 4 and an open position for opening the playing part 4 while being housed within the piano body 1; and an auxiliary keyboard cover 24 which is provided in an upper part in the rear of the playing part 4 of the piano body 1 turnably around a support shaft 26 extending laterally, and opens and closes the playing part 4 in cooperation with the main keyboard cover 23 by turning in interlocking with the sliding operation of the main keyboard cover 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is applied to a keyboard musical instrument such as an electronic piano, and relates to a keyboard lid device for a keyboard musical instrument that opens and closes a performance unit including the keyboard with a sliding keyboard lid.

  Conventionally, what was disclosed by patent document 1 is known as a keyboard musical instrument provided with this kind of keyboard cover apparatus. The instrument body of the keyboard instrument is provided with a performance section including a keyboard in the front part thereof, and a slide type keyboard lid that opens and closes the performance section. This keyboard lid is composed of two keyboard lids on the front and rear sides, both of which are composed of a single plate-like member having a horizontally long planar shape. Near the rear end of the front keyboard lid (hereinafter referred to as “front keyboard lid”), pinion shafts extending in the left-right direction along the edge and having pinions fixed to both ends are rotatably provided. . In addition, left and right racks extending in the front-rear direction are provided on the inner surfaces of the left and right side plates of the instrument body, and the left and right pinions mesh with these racks. On the other hand, guide members that extend in the front-rear direction and project upward from the rear keyboard lid are attached to the left and right end surfaces of the rear keyboard lid (hereinafter referred to as “rear keyboard lid”). An elongated guide hole extending in the front-rear direction is formed in the protruding portion of the member. The pinion shaft of the front keyboard lid is slidably engaged with both guide members in a state of passing through both guide holes.

  In the keyboard lid device configured as described above, when opening the performance section, first, the front keyboard lid is slid rearward and superimposed on the rear keyboard lid. In this case, both pinions move rearward along both racks while rotating, and the pinion shaft moves rearward while being guided by both guide holes. Next, after the pinion shaft comes into contact with the rear end edges of the guide holes, the front keyboard cover is further slid rearward so that the rear keyboard cover is slid rearward together with the front keyboard cover. As a result, the front keyboard cover and the rear keyboard cover are accommodated inside the musical instrument main body in a state where the front keyboard cover and the rear keyboard cover overlap each other, and the performance section is opened. On the other hand, when closing the performance part opened as described above, the front keyboard cover on the rear keyboard cover is slid forward and moved to the front side of the rear keyboard cover. Then, after the pinion shaft comes into contact with the front end edges of both guide holes, the front keyboard cover is further slid forward, so that the rear keyboard cover is slid forward together with the front keyboard cover. Thus, with the front keyboard cover and the rear keyboard cover arranged side by side, the front half and the latter half of the performance section are respectively covered, and the performance section is closed by both keyboard covers.

JP-A-8-263051

  As described above, in the conventional keyboard lid device, the keyboard lid is composed of the two front and rear keyboard lids and the rear keyboard lid, and when the performance section is opened, these keyboard lids overlap each other in the vertical direction. Housed inside. For this reason, in the above-mentioned keyboard instrument, the depth dimension of the storage space for the keyboard lid in the instrument body can be reduced as compared with the case where the keyboard lid is composed of a single plate-like member that covers the entire performance section. Therefore, it is possible to reduce the depth dimension of the instrument body itself.

  However, in this keyboard lid device, when the keyboard lid is opened and closed while sliding the keyboard lid, initially, only the front keyboard lid is slid, so that it can be operated relatively smoothly. Since it is slid integrally with the lid, the person who performs the opening / closing operation feels that the keyboard lid suddenly becomes heavy during the operation. In addition, when the front keyboard cover is slid swiftly during the opening / closing operation, the pinion shaft of the front keyboard cover collides with the front end or rear end edge of the guide holes of both guide members. May occur.

  Furthermore, in the above keyboard instrument, when the performance part is closed by the front keyboard cover and the rear keyboard cover, a step corresponding to the thickness of the front keyboard cover occurs at the boundary between both keyboard covers, and the pinion shaft is exposed. Or the like, the appearance of the instrument body is impaired. In this keyboard instrument, the left and right racks for guiding the front keyboard cover via the pinion extend to the vicinity of the center in the front-rear direction of the keyboard. For this reason, in a state where the performance part is opened, the front part of both racks can be seen from the player side, and in this case, the appearance of the instrument main body is also impaired.

  The present invention has been made to solve the above-described problems, and while maintaining the compact depth of the instrument body, the keyboard lid can be smoothly opened and closed, and the instrument body has a good appearance. An object of the present invention is to provide a keyboard lid device for a keyboard instrument that can be obtained.

  In order to achieve the above object, the invention according to claim 1 is a musical instrument main body having a performance part including a keyboard in a front part of a keyboard instrument that is closed in a state of covering the performance part and opened in an exposed state. A keyboard lid device comprising a single plate-like member having a depth dimension shorter than that of the performance section, and in a state in which the performance section is accommodated in a closed position for closing the performance section and housed in the instrument body Between the main keyboard cover that is slidable in the front-rear direction on the instrument body and the rear upper part of the performance part of the instrument body so as to be rotatable about an axis extending in the left-right direction. And an auxiliary keyboard lid that opens and closes the performance unit in cooperation with the main keyboard lid by rotating in conjunction with the sliding operation of the main keyboard lid.

  According to this configuration, in the musical instrument main body having a performance unit including a keyboard at the front, the performance unit is opened and closed by the main keyboard cover and the auxiliary keyboard cover. Specifically, when opening the closed performance part, the main keyboard cover is slid from the closed position to the open position at the back and accommodated in the instrument body. In this case, the auxiliary keyboard lid that closed the performance part together with the main keyboard lid rotates around the axis extending in the left-right direction in conjunction with the sliding operation of the main keyboard lid, and cooperates with the main keyboard lid. Open up the performance section. On the other hand, when closing the performance part opened as described above, the main keyboard cover located at the open position in the instrument body is slid to the front closed position. In this case, the auxiliary keyboard cover is rotated and returned to the original position in conjunction with the sliding operation of the main keyboard cover, and closes the performance unit in cooperation with the main keyboard cover.

  As described above, since the main keyboard cover is composed of a single plate-like member having a depth dimension shorter than that of the performance section, the main keyboard cover is configured to have a depth dimension that covers the entire performance section. In comparison, the depth dimension of the storage space for the main keyboard lid in the instrument body can be reduced. Therefore, according to the present invention, the depth dimension of the musical instrument main body can be kept compact. Also, the auxiliary keyboard lid rotates in conjunction with the sliding operation of the main keyboard lid, so the performance that is closed by the main keyboard lid and the auxiliary keyboard lid simply by sliding the main keyboard lid from the closed position to the open position. On the contrary, by simply sliding the main keyboard cover from the open position to the closed position, the open performance section can be closed with the main keyboard cover and the auxiliary keyboard cover. Thus, the opening / closing operation of both keyboard covers for opening and closing the performance section can be performed smoothly.

  The invention according to claim 2 is the keyboard lid device of the keyboard instrument according to claim 1, wherein the auxiliary keyboard lid is rotatably supported at the upper end portion, and the main keyboard lid is located at the closed position. The performance part is closed together with the main keyboard cover in a state where the lower end part is in contact with the rear end surface of the main keyboard cover, and the main keyboard cover is slid to the open position side, so that the main keyboard cover is pressed backward. While rotating, the lower end portion is held in contact with the upper surface of the main keyboard cover, and the performance section is opened together with the main keyboard cover.

  According to this configuration, the auxiliary keyboard lid is rotatably supported at the upper end portion, and when the performance portion is closed, the performance portion is held together with the main keyboard lid while the lower end portion is in contact with the rear end surface of the main keyboard lid. Close. In this way, when the performance section is closed, the main keyboard cover and the auxiliary keyboard cover are in a series of states, and unlike the conventional case, there is no step between the two keyboard covers, and the instrument body has a good appearance. Obtainable.

  When the main keyboard cover is slid to the open position when the performance section is opened, the auxiliary keyboard cover is rotated rearward by being pressed by the main keyboard cover, and the lower end is in contact with the upper surface of the main keyboard cover. Is held in the state. Specifically, the auxiliary keyboard lid is rotated as described above, so that the lower end portion turns from the rear end surface of the main keyboard lid to the upper surface side, slides on the upper surface, and comes into contact with the upper surface. Retained. As a result, the auxiliary keyboard lid opens the performance section together with the main keyboard lid. When closing the performance part opened in this way, the auxiliary keyboard cover is rotated and returned to the original position by the reverse operation to the above by sliding the main keyboard cover to the closed position side. The lower end portion of the auxiliary keyboard lid contacts the rear end surface of the main keyboard lid. As a result, the auxiliary keyboard lid closes the performance section together with the main keyboard lid. As described above, the auxiliary keyboard cover that rotates in conjunction with the slide operation of the main keyboard cover and opens and closes the performance unit in cooperation with the main keyboard cover can be easily realized with a relatively simple configuration. .

  According to a third aspect of the present invention, in the keyboard lid device of the keyboard instrument according to the second aspect, the main keyboard lid is provided rotatably at the lower end of the auxiliary keyboard lid, and the main keyboard lid is located at the closed position. A roller that contacts the rear end surface and rolls on the upper surface of the main keyboard lid when the main keyboard lid is slid is further provided.

  According to this configuration, the roller provided rotatably at the lower end portion of the auxiliary keyboard lid abuts on the rear end surface of the main keyboard lid when the main keyboard lid is in the closed position, while the main keyboard lid is slid. Roll over its top surface when it is done. This reduces the friction between the two keyboard covers when the main keyboard cover is slid, compared to when the auxiliary keyboard cover is in direct contact with the main keyboard cover, thereby making the sliding operation of the main keyboard cover smoother. It can be carried out. Further, since the auxiliary keyboard lid contacts the main keyboard lid via the above-described roller, it is possible to prevent the upper surface and the rear end surface from being damaged when the main keyboard lid is slid.

  The invention according to claim 4 is the keyboard lid device of the keyboard instrument according to any one of claims 1 to 3, wherein the rack is provided on the inner surfaces of the left and right side plates of the instrument body and extends in the front-rear direction. Two left and right pinions that are rotatably provided to the left and right behind the main keyboard cover, respectively mesh with two racks, a pinion shaft that extends in the left-right direction and supports two pinions at both ends, and the pinion shaft When the main keyboard lid is connected to the main keyboard lid and the main keyboard lid is located at the closed position, the two pinions and the pinion shaft are held behind the playing unit, and the main keyboard lid is located at the open position. And a pinion holding mechanism for holding two pinions and a pinion shaft near the rear end of the main keyboard lid.

  According to this configuration, the left and right racks extending in the front-rear direction are provided on the inner surfaces of the left and right side plates of the instrument body, and the left and right two pinions on the rear side of the main keyboard cover are engaged with these racks, respectively. ing. Since the main keyboard lid can be guided in the front-rear direction via these racks and pinions, the sliding operation of the main keyboard lid can be performed more smoothly.

  In addition, pinion shafts having pinions at both ends are connected to the main keyboard cover via a pinion holding mechanism. By this pinion holding mechanism, when the main keyboard cover is located at the closed position, both the pinion and the pinion shaft are held behind the playing unit, so that the left and right racks with which both pinions are engaged respectively have the front end at the playing unit. It is possible to arrange so that it is located behind. Thereby, when the performance section is opened, the left and right racks can be hidden from the player side, and a good appearance of the instrument body can be obtained. In addition, when the main keyboard lid is located at the open position by the pinion holding mechanism, both the pinion and the pinion shaft are held near the rear end of the main keyboard lid, so both the pinion and the pinion shaft are included in the instrument body. The depth of the storage space for the main keyboard lid is not increased. Accordingly, it is possible to ensure a compact depth dimension of the instrument body.

  According to a fifth aspect of the present invention, in the keyboard lid device of the keyboard musical instrument according to the fourth aspect, the pinion holding mechanisms have the same length and extend in the left-right direction, intersect with each other at the central portion, and are rotatable. Each of the two link bars has one end rotatably connected to the rear end of the lower surface of the main keyboard lid and the other end rotated to the pinion shaft. The two link bars are movably connected, and both end portions on the same side of the left and right sides of the two link bars are slidably connected in the left-right direction.

  According to this configuration, the pinion holding mechanism has the two link bars described above, and one end of each link bar is rotated to the rear end of the lower surface of the main keyboard cover, and the other end is rotated to the pinion shaft. It is connected freely. In addition, both end portions on the same side of the left and right sides of both link bars are coupled to be slidable in the left-right direction. Since these link bars rotate with the center portion as a fulcrum, the width in the front-rear direction changes. It can be positioned relatively far from the rear end and near the rear end of the main keyboard lid located in the open position. Thus, with the two link bars, the pinion holding mechanism can be easily realized with a relatively simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS In the electronic piano to which the keyboard cover apparatus by one Embodiment of this invention is applied, it is a figure which shows the state by which the performance part is closed, (a) is a side view which shows the internal structure of a piano main body, (b) is a keyboard. It is a top view which shows a cover apparatus, Comprising: The state which abbreviate | omitted the auxiliary keyboard cover is shown. In the electronic piano of FIG. 1, it is a figure which shows the state by which the performance part is open | released, (a) And (b) is the side view and top view similar to FIG. 1, respectively. It is a figure which shows operation | movement of the keyboard cover apparatus at the time of releasing a performance part in order.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1A and FIG. 2A show a piano body in which a keyboard lid device according to an embodiment of the present invention is applied to an electronic piano as a keyboard instrument. As shown in these drawings, the piano main body 1 (musical instrument main body) is provided in an outer case 2 constituting the outer case and a front portion of the outer case 2 (left part in both figures), and includes a keyboard 3. A performance unit 4 and a keyboard lid device 5 that is closed to cover the performance unit 4 and open to an exposed state are provided.

  The outer case 2 includes a shelf plate 11 whose plan shape is a horizontally long rectangular shape, two left and right side plates 12 and 12 (only one is shown) erected on both left and right ends of the shelf plate 11, and left and right side plates 12 and 12. In the middle, it is constituted by a mouth bar 13, an upper front plate 14 and a back plate 15 provided at the lower front end portion, the upper front end portion and the rear end portion, and a roof 16 constituting the ceiling portion. On the shelf board 11, in addition to the keyboard 3, various devices not shown are installed. The left and right side plates 12 and 12 are symmetrical with each other, and are formed so that the lower half protrudes greatly forward. A guide groove 12a for guiding a front end portion of a main keyboard lid 23, which will be described later, is provided in the front half portion of the inner surface of each side plate 12, and a rack that meshes with a pinion 32 of a keyboard lid guide mechanism 22, which will be described later. 12b is provided. The guide groove 12a extends in the front-rear direction between the predetermined position in front of the keyboard 3 and the predetermined position above the rear end of the operation panel 6 to be described later, with the front inclined as a whole. On the other hand, the rack 12 b extends in the front-rear direction between a predetermined position behind the operation panel 6 and a predetermined position near the back plate 15.

  The performance section 4 is provided with a keyboard 3 having a large number of white keys 3a and black keys 3b arranged side by side in the left-right direction, and is tilted forward and downward above the keyboard 3. An operation panel 6 having a plurality of switches, buttons, etc. (none of which are shown) for executing the functions is used.

  The keyboard lid device 5 includes a keyboard lid 21 that opens and closes the performance unit 4 and a keyboard lid guide mechanism 22 for smoothly sliding a main keyboard lid 23 (to be described later) of the keyboard lid 21 in the front-rear direction.

  The keyboard lid 21 includes a slide-type main keyboard lid 23 and a rotary auxiliary keyboard lid 24 that open and close the performance unit 4 in cooperation with each other. The main keyboard cover 23 is formed of a single plate-like member having a planar shape that is formed in a horizontally-long rectangular shape, having a width that is substantially the same as the distance between the left and right side plates 12, 12, and a depth that is shorter than the performance section 4. Has been. The front end portion of the main keyboard lid 23 is provided with a lid front portion 25 that extends in the left-right direction along the edge and projects downward by a predetermined length and functions as a handle when the keyboard lid 21 is opened and closed. . Further, on both left and right end surfaces of the lower end portion of the lid front part 25, there are provided engaging convex portions 25a that protrude slightly outward and slidably engage with the guide grooves 12a of the left and right side plates 12, 12. ing.

  On the other hand, the auxiliary keyboard cover 24 is formed so that the front shape is a horizontally long rectangular shape and is convexly curved rearward, and has the same width as the main keyboard cover 23 and between the upper front plate 14 and the upper end of the operation panel 6. It is comprised with the single member which has the height dimension substantially the same as this distance. The auxiliary keyboard cover 24 is rotatably provided above the rear part of the performance section 4. Specifically, a support shaft 26 (axial line) extending in the left-right direction at the lower end portion of the upper front plate 14 at the upper end portion. Is supported so as to be rotatable around the center. In addition, a roller 27 is provided at the lower end of the auxiliary keyboard cover 24 so as to be rotatable about an axis extending in the left-right direction. The roller 27 is formed in a cylindrical shape having an outer diameter that is substantially the same as the thickness of the main keyboard lid 23 and a length that is substantially the same as the lateral width of the auxiliary keyboard lid 24.

  As shown in FIG. 1B, the keyboard lid guide mechanism 22 is configured to have the same shape and size as the pinion shaft 31 extending in the left-right direction (the vertical direction in the figure), and at both ends of the pinion shaft 31. The left and right pinions 32 and 32 that are fixed and meshed with the racks 12b and 12b of the left and right side plates 12 and 12, respectively, are connected between the pinion shaft 31 and the main keyboard cover 23, and the pinion shaft 31 is freely rotatable. And a pinion holding mechanism 33 that holds the main keyboard lid 23 so as to be movable toward and away from the rear end of the main keyboard lid 23.

  The pinion holding mechanism 33 has two link bars 34, 34 having the same length and extending in the left-right direction, and the link bars 34, 34 are connecting shafts extending in the up-down direction at the center thereof. The two are connected to each other via 35. The ends of the link bars 34, 34 on the main keyboard lid 23 side are pivotally connected to the left and right rear end portions of the main keyboard lid 23 via a predetermined attachment 36. The attachment 36 supports one end of each link bar 34 so as to be rotatable about an axis extending in the left-right direction, and rotatably supported via a connecting pin 34a extending in the vertical direction. Further, a guide hole 36a extending in the left-right direction is provided on the left side (upper side in FIG. 1B), and a connecting pin 34a of one link bar 34 slides in the guide hole 36a. Engage freely.

  On the other hand, both end portions of the link bars 34, 34 on the pinion shaft 31 side are rotatably connected to the left and right end portions of the pinion shaft 31 via a predetermined connecting tool 37. The connector 37 rotatably supports the pinion shaft 31 and rotatably supports the other end of each link bar 34 via a connecting pin 34b extending in the vertical direction. Further, the left connecting tool 37 is provided with a guide hole 37a similar to the guide hole 36a of the mounting tool 36 described above, and the connecting pin 34a of the other link bar 34 is slidably engaged with the guide hole 37a. Match.

  In addition, springs 38 and 38 are provided between the attachment tool 36 and the connection tool 37 on the same left and right sides, respectively, for urging them in the direction in which they approach each other.

  In the pinion holding mechanism 33 configured as described above, the link bars 34 and 34 rotate about the connecting shaft 35 at the center, so that the left end of each link bar 34 slides in the left-right direction. However, the width in the front-rear direction of both link bars 34, 34 changes. As a result, the left and right pinions 32, 32 and the pinion shaft 31 are separated from the rear end of the main keyboard lid 23 by a predetermined distance (position shown in FIG. 1), and near the rear end of the main keyboard lid 23 (see FIG. 2). The position can be translated in parallel.

  Next, the opening / closing operation of the performance unit 4 by the keyboard lid device 5 configured as described above will be described with reference to FIG. FIG. 4A shows a state in which the performance unit 4 is closed by the keyboard lid 21. In this state, the main keyboard lid 23 is located at the closed position, and is closed in a state in which the space between the front of the keyboard 3 and a predetermined position ahead of the rear end of the operation panel 6 in the performance unit 4 is covered. is doing. Further, in the keyboard lid guide mechanism 22, the width in the front-rear direction of both link bars 34, 34 of the pinion holding mechanism 33 expands against the urging force of the springs 38, 38, and the left and right pinions 32, 32 and the pinion shaft 31. Is away from the rear end of the main keyboard lid 23. Further, the auxiliary keyboard cover 24 has a roller 27 at the lower end thereof in contact with the rear end surface of the main keyboard cover 23. As described above, the main keyboard cover 23 and the auxiliary keyboard cover 24 cooperate to close the entire performance unit 4.

  When opening the performance unit 4 from this state, first, the hand is lifted slightly by placing the hand on the lid front part 25 of the main keyboard lid 23, and then the main keyboard lid 23 is pushed backward. Thus, as shown in FIG. 3B, the main keyboard lid 23 has the left and right engaging convex portions 25a and 25a of the lid front portion 25 and the rear left and right pinions 32 and 32, respectively. It slides backward while being guided by the groove 12a and the rack 12b. In this case, the auxiliary keyboard cover 24 rotates backward when the roller 27 is pressed by the main keyboard cover 23. As a result, the roller 27 rolls around the upper surface of the main keyboard lid 23 and rolls. Further, in this case, the width in the front-rear direction of both link bars 34, 34 is narrowed by the biasing force of the springs 38, 38, and the left and right pinions 32, 32 and the pinion shaft 31 are positioned near the rear end of the main keyboard lid 23.

  Then, by pushing the main keyboard cover 23 further rearward, the main keyboard cover 23 slides further rearward and reaches the open position shown in FIG. Specifically, the main keyboard lid 23 is housed inside the exterior case 2 with its front end positioned above the rear end of the operation panel 6 and its rear end positioned near the back plate 15. The In this case, the auxiliary keyboard cover 24 is held in a state in which the roller 27 rolls to the vicinity of the front end of the upper surface of the main keyboard cover 23 and rotates backward. As a result, the entire performance unit 4 is opened. In this case, the left and right pinions 32 and 32 and the pinion shaft 31 are maintained near the rear end of the main keyboard lid 23.

  On the other hand, when closing the performance unit 4 opened as described above, the main keyboard cover 23 located at the open position is pulled forward. Thus, contrary to the above operation, the main keyboard lid 23 slides forward and the auxiliary keyboard lid 24 rotates forward. Then, the main keyboard cover 23 reaches the closed position, and the auxiliary keyboard cover 24 returns to its original position. In this case, the left and right pinions 32 and 32 and the pinion shaft 31 are held by the pinion holding mechanism 33 at a position away from the rear end of the main keyboard lid 23.

  As described above in detail, according to the present embodiment, the main keyboard cover 23 is composed of a single plate-like member having a depth dimension shorter than that of the performance section 4 so that the entire performance section 4 is covered. As compared with the case where it is configured to have a large depth dimension, the depth dimension of the accommodation space of the main keyboard lid 23 in the piano body 4 can be reduced. Thereby, the depth dimension of the piano main body 1 can be maintained compactly. Further, since the auxiliary keyboard lid 24 is rotated in conjunction with the sliding operation of the main keyboard lid 23, the main keyboard lid 23 and the auxiliary keyboard lid 24 can be simply moved by sliding the main keyboard lid 23 from the closed position to the open position. The performance unit 4 that has been closed can be opened, and conversely, the performance unit 4 that has been opened can be removed from the main keyboard cover 23 and the auxiliary keyboard cover simply by sliding the main keyboard cover 23 from the open position to the closed position. 24 can be closed. In this way, the opening / closing operation of the two keyboard lids 23 and 24 for opening and closing the performance unit 4 can be performed smoothly.

  Further, in a state in which the performance section 4 is closed, the roller 27 at the lower end of the auxiliary keyboard lid 24 abuts on the rear end surface of the main keyboard lid 23, so that both the keyboard lids 23 and 24 are in a series. Therefore, unlike the prior art, there is no step between the keyboard lids 23, 24, and a good appearance of the piano body 1 can be obtained. Further, when the main keyboard lid 23 is slid, the auxiliary keyboard lid 24 contacts the main keyboard lid 23 via the roller 27, so that the main keyboard lid 23 can be slid more smoothly and the upper surface of the main keyboard lid 23 It is possible to prevent the rear end face from being damaged.

  Further, in the keyboard lid guide mechanism 22 that supports the main keyboard lid 23 at the rear end thereof, the left and right pinions 32, 32 are moved by the pinion holding mechanism 33 when the main keyboard lid 23 is located at the closed position. Is kept behind. Thus, the left and right racks 12b, 12b meshing with both pinions 32, 32 do not need to be positioned in front of the rear end of the performance section 4, and therefore, when the performance section 4 is opened, both racks 12b , 12b can be made invisible from the player side, and a good appearance of the piano body 1 can be obtained. The pinion holding mechanism 33 holds the pinion shaft 31 near the rear end of the main keyboard lid 23 when the main keyboard lid 23 is in the open position, so that both pinions 32, 32 and The depth dimension of the accommodation space of the main keyboard lid 23 including the pinion shaft 31 is not increased. Accordingly, it is possible to ensure a compact depth dimension of the piano body 1.

  In addition, this invention can be implemented in various aspects, without being limited to the said embodiment described. For example, in the embodiment, the auxiliary keyboard cover 24 is formed so as to be convexly curved backward, but the present invention is not limited to this, and rotates in conjunction with the slide operation of the main keyboard cover 23. As long as the performance unit 4 is opened and closed together with the main keyboard cover 23, an auxiliary keyboard cover of another shape may be adopted. Further, the roller 27 is provided at the lower end portion of the auxiliary keyboard lid 24. However, the lower end portion of the auxiliary keyboard lid 24 can be smoothly slidably contacted with the upper surface of the main keyboard lid 23 when the main keyboard lid 23 is slid. In this case, the roller 27 can be omitted. Further, instead of the springs 38, 38 in the pinion holding mechanism 33, a torsion coil spring is attached to a connecting shaft 35 that connects the link bars 34, 34 to each other, and both link bars 34, 34 are applied by the biasing force of the torsion coil spring. The width in the front-rear direction may be reduced.

  The detailed configuration of the keyboard lid device 5 shown in the embodiment is merely an example, and can be appropriately changed within the scope of the gist of the present invention.

1 Piano body (instrument body)
2 exterior case 3 keyboard 4 performance section 5 keyboard lid device 6 operation panel 12 side plate 12a guide groove 12b rack 21 keyboard lid 22 keyboard lid guide mechanism 23 main keyboard lid 24 auxiliary keyboard lid 26 support shaft (axis)
27 Roller 31 Pinion shaft 32 Pinion 33 Pinion holding mechanism 34 Link bar

Claims (5)

In a musical instrument main body having a performance part including a keyboard in a front part, a keyboard lid device for a keyboard instrument that is closed in a state of covering the performance part and opened in an exposed state,
The performance unit is opened with a single plate-like member having a depth dimension shorter than that of the performance unit, in a closed position for closing the performance unit, and in a state accommodated in the instrument body. A main keyboard lid that is slidable in the front-rear direction on the instrument body between the open position;
It is provided above the rear portion of the musical performance section of the instrument body so as to be rotatable about an axis extending in the left-right direction, and is rotated in conjunction with the sliding operation of the main keyboard cover, thereby cooperating with the main keyboard cover. An auxiliary keyboard lid that works to open and close the performance part;
A keyboard lid device for a keyboard instrument, comprising:   The auxiliary keyboard lid is rotatably supported at the upper end portion, and when the main keyboard lid is located at the closed position, the lower end portion is in contact with the rear end surface of the main keyboard lid, The performance part is closed together with the main keyboard cover, and the main keyboard cover is slid to the open position side so that the main keyboard cover is rotated backward by pressing by the main keyboard cover, and the lower end part is the main keyboard cover. 2. The keyboard lid device for a keyboard instrument according to claim 1, wherein the keyboard is held in contact with the upper surface and the performance section is opened together with the main keyboard lid.   When the main keyboard cover is provided at the lower end portion of the auxiliary keyboard cover so as to be rotatable and abuts against the rear end surface of the main keyboard cover when the main keyboard cover is in the closed position, and the main keyboard cover is slid The keyboard cover device for a keyboard instrument according to claim 2, further comprising a roller that rolls on the upper surface of the main keyboard cover. Two left and right racks respectively provided on the inner surfaces of the left and right side plates of the instrument body and extending in the front-rear direction;
Two left and right pinions that are rotatably provided on the left and right sides of the main keyboard cover and mesh with the two racks, respectively;
A pinion shaft extending in the left-right direction and supporting the two pinions at both ends,
The pinion shaft and the main keyboard lid are connected to each other, and when the main keyboard lid is located at the closed position, the two pinions and the pinion shaft are held behind the playing unit, and the A pinion holding mechanism that holds the two pinions and the pinion shaft near the rear end of the main keyboard lid when the main keyboard lid is located in the open position;
The keyboard lid device for a keyboard musical instrument according to any one of claims 1 to 3, further comprising: The pinion holding mechanism has two link bars that have the same length as each other, extend in the left-right direction, intersect each other at the center, and are rotatably connected.
Each of the two link bars has one end portion rotatably connected to the rear end portion of the lower surface of the main keyboard cover and the other end portion rotatably connected to the pinion shaft. 5. The keyboard lid device for a keyboard instrument according to claim 4, wherein both ends of the bar on the same side are connected to be slidable in the left-right direction.

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