JP2013019969A - Lid body opening/closing structure of keyboard instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid body opening/closing structure of a keyboard instrument which has a simple and compact structure and facilitates the opening/closing operation of a lid body.SOLUTION: A coupling mechanism 30 for coupling a side wall portion 6 of a case 10 and an end part of a lid body 20 opposite thereto, includes: a long plate-shaped coupling tool 31 journaled at a first pivotally-supporting portion 33 provided on the side wall portion 6 at one end 31a, and journaled at a second pivotally-supporting portion 35 provided on the end part of the lid body 30 at the other end 31b; and a slide mechanism 40 for making a rear end part 20a of the lid body 20 slide in a fore-and-aft direction of a body portion 2 when the lid body 20 moves between a close position and an open position. When the lid body 20 moves from the close position to the open position, the rear end portion 20a of the lid body 20 slides in a longitudinal direction toward a front side from a rear side.

Description

  The present invention relates to a lid opening / closing structure for a keyboard instrument comprising a lid that opens and closes an upper surface side of a keyboard installed in a case, and a coupling mechanism that movably connects the lid to the case.

  Various keyboard instruments such as an electronic organ and an electronic piano include a keyboard lid (lid) for opening and closing the upper surface side of a keyboard installed in a case. As a prior art of such an opening / closing mechanism for opening and closing the keyboard lid, for example, there is an opening / closing mechanism disclosed in Patent Document 1. The opening / closing mechanism described in Patent Document 1 is a position in which the instrument body and the vicinity of the rear end of the keyboard lid are pivotally connected to each other by a link member, and a position away from the position where the link member of the keyboard lid is pivotally supported by a predetermined distance. A guide abutting portion is provided at the time of opening and closing the keyboard lid, and the guide abutting portion is always brought into contact with the first and second guide portions comprising at least two different curved surfaces of the guide member fixed in the instrument body. It is configured to move while moving. According to this opening / closing mechanism, the gap between the keyboard lid and the front end of the top plate of the instrument body can be minimized, and the rotation space required for housing the rear part of the keyboard lid in the instrument body can also be reduced. .

Japanese Patent Publication No. 7-38106

  However, in the keyboard lid opening / closing structure described in Patent Document 1, it is necessary to secure a space for housing the rear end of the lid in the instrument body. For this reason, there is a risk that the instrument body may be hindered in size. Further, since the lid body is accommodated in the musical instrument main body, there is a possibility that the number of parts of the connecting mechanism provided between the lid body and the main body increases, the structure becomes complicated, and the like.

  On the other hand, as another configuration example of the keyboard lid opening / closing structure, there is a configuration in which a rear end portion of a single plate-like keyboard lid is rotatably attached to the instrument body. This pivotable keyboard lid is a single plate-like member that can be manufactured relatively inexpensively and is erected on the instrument body when the lid is opened, so there is a space for storing the lid inside the instrument body. There is no need to secure.

  However, in this keyboard lid opening / closing structure, the single-plate-like keyboard lid is pivoted in the vertical direction with the rear end portion as a fulcrum. Therefore, the movement of the center of gravity is large when the lid is opened and closed, which makes it difficult to open and close the lid, and the attitude of the lid changes abruptly. There was a risk of having hands in between.

  The present invention has been made in view of the above-mentioned points, and the object thereof is a simple and compact configuration, can reduce the movement of the center of gravity at the time of opening and closing the lid, and can be easily opened and closed. Another object of the present invention is to provide a lid opening / closing structure for a keyboard instrument that can improve the appearance of the keyboard instrument when the lid is opened.

  The present invention for solving the above problems includes a body (2) having a case (10) and a keyboard (5) comprising a plurality of keys (5a, 5b) installed in the case (10). A plate-like lid attached to the case (10) so as to be movable between a closed position where the upper part of the keyboard (5) is closed and an open position where the upper part of the keyboard (5) is opened. (20), a side wall portion (6) disposed on a side portion of the keyboard (5) in the case (10), and an arrangement direction of the keys (5a, 5b) in the lid (20) opposed to the side wall portion (6). A lid opening / closing structure for a keyboard instrument comprising a coupling mechanism (30) formed by coupling an end (20d), wherein the coupling mechanism (30) has one end (31a) at the side wall (6). ), And the other end (31b) is supported by the lid (20). A long connector (31) pivotally supported by a second pivotal support (35) provided at the end (20d) of the lid, and the lid (20) between the closed position and the open position. A slide mechanism (40, 40-2) configured to slide and move the rear end (20a) of the lid (20) in the front-rear direction of the main body (2) when moving between And when the lid body (20) moves from the closed position to the open position, the rear end portion (20a) of the lid body (20) moves the longitudinal direction of the key (5a, 5b) from the rear side. It is configured to slide and move toward the front side. Further, in this case, the first shaft support portion (33) is an inner surface facing the keyboard (5) side at the end portion (20d) of the lid (20) in the arrangement direction of the keys (5a, 5b) ( 20c).

  According to the lid opening / closing structure of the keyboard instrument according to the present invention, one end is pivotally supported by the first pivot support provided on the side wall, and the other end is pivoted on the second pivot support provided on the end of the lid. The long connecting tool that is supported and the rear end of the lid slide in the front-rear direction of the main body when the lid moves between the closed position and the open position. And a sliding mechanism configured such that when the lid moves from the closed position to the open position, the rear end portion of the lid slides in the longitudinal direction of the key from the rear side toward the front side. This makes it possible to minimize the movement of the center of gravity of the lid when opening and closing, while maintaining a simple mechanism that reduces the number of parts of the connection mechanism that connects the main body of the keyboard instrument and the lid. The posture of the body can be prevented from changing suddenly, and the lid can be easily opened and closed.

  In this case, the first shaft support portion (33) may be disposed at a position closer to the front side of the main body portion (2) than the second shaft support portion (35). According to this configuration, the lid can be moved more smoothly between the closed position and the open position while reducing the size of the coupling mechanism.

  Further, in the lid opening / closing structure of the keyboard instrument, the side wall portion (6) is a pair of side wall portions (6, 6) provided on both sides of the keyboard (5) in the case (10), The coupling mechanism (30, 30) includes the pair of side wall portions (6, 6) and the end portions (20d, 20d) on both sides of the lid (20) in the arrangement direction of the keys (5a, b). The slide mechanism (40) is separable from the upper end surfaces (6a, 6a) of the pair of side wall portions (6, 6). The rear end portion (20a) of the lid body (20) that contacts in a state may be in sliding contact with the upper end surfaces (6a, 6a) of the pair of side wall portions (6, 6).

  According to this configuration, the slide mechanism is configured by the upper end surface of the side wall portion and the rear end portion of the lid body. Since it is not necessary, the number of parts of the opening / closing mechanism can be reduced, and the configuration of the keyboard instrument can be simplified and the cost can be reduced.

  In the keyboard instrument lid opening / closing structure, the stopper (37) is provided to stop the movement of the lid (20) in contact with the connector (31) when the lid (20) is in the open position. The lid (20) in the open position is tilted so that the rear end (20a) is located on the front side of the main body (2) with respect to the front end (20b). ) On the upper surface.

  According to this configuration, in the state where the lid body is in the open position, the stopper portion abuts on the coupling tool and stops its movement, so that the lid body can be reliably stopped at the open position. Open / close operation is stable. Moreover, it can regulate so that the rear-end part of a cover body and the upper end surface of a side wall part may not space apart in an open position. Thereby, it can prevent that a cover body falls down backward in an open position. Moreover, the possibility that a finger or the like is sandwiched between the rear end portion of the lid and the upper end surface of the side wall portion can be reduced.

  In this case, the lid is erected on the upper surface of the main body with the rear end inclined at the open position so that the rear end is positioned on the front side of the main body. It is possible to stably stop at the position. Therefore, it can prevent more reliably that the cover body of an open position will move to the closed position carelessly and will close.

  Further, in the lid opening / closing structure of the keyboard instrument, the slide mechanism (40-2) includes the main body (2) provided on either the side wall (6) or the lid (20). A recess (43a) extending in the front-rear direction, and a convex portion (45a) provided on the other side of the side wall (6) and the lid (20), with respect to the recess (43a) It may be a mechanism in which the convex portion (45a) is fitted in a slidable state.

  According to this configuration, since the convex portion is fitted in the concave portion, the concave portion and the convex portion slide without being separated from each other in the sliding movement of the lid with respect to the side wall portion. Therefore, the distance between the upper end surface of the side wall portion and the rear end portion of the lid body does not change when the lid body moves. Thereby, smoother opening / closing operation | movement of a cover body is realizable. Further, it is possible to prevent a finger or the like from being sandwiched between the upper end surface of the side wall portion and the rear end portion of the lid when the lid is opened and closed. Furthermore, it is possible to prevent twisting and distortion from occurring in the connector that connects the side wall portion and the lid.

  Further, in the lid opening / closing structure of the keyboard instrument described above, a biasing force that biases the lid (20) in the direction of moving to the open position is provided between the connector (31) and the main body (2). The resulting elastic member (60) may be attached. According to this configuration, the force required to move the lid to the open position can be reduced, and the lid can be easily opened. In addition, since the lid can be prevented from moving suddenly during the opening / closing operation of the keyboard instrument, the opening / closing operation of the lid can be stabilized. In addition, even if a finger or the like is sandwiched between the lid and the main body, the pinching force can be reduced, so that safety is improved.

  In the keyboard instrument lid opening / closing structure described above, at least one of the first shaft support portion (33) and the second shaft support portion (35), or the concave portion (43a) and the convex portion ( 45a), there is a resistance generating section (32, 46, 47) that generates a resistance to relative rotation between the main body (2) or the lid (20) and the connector (31). It should be provided.

According to this configuration, the opening / closing operation of the lid is slow due to the resistance against the relative rotation of the main body or the lid and the coupling tool. It becomes possible to more effectively prevent pinching. In addition, since the lid can be prevented from moving suddenly in the opening / closing operation of the lid, the opening / closing operation of the lid can be stabilized.
In addition, the code | symbol in said parenthesis has shown the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

  According to the lid opening / closing structure of a keyboard instrument according to the present invention, the lid can be easily opened / closed with a simple and compact configuration, with little movement of the center of gravity when the lid is opened / closed, and the lid opening / closing. The appearance of the keyboard instrument at the time can be improved.

It is a perspective view showing the example of whole composition of a keyboard musical instrument provided with the lid opening and closing structure concerning a 1st embodiment of the present invention. It is a figure which shows the detailed structure of the cover body opening-closing structure concerning 1st Embodiment, and is a sectional side view of a keyboard instrument. It is a figure for demonstrating operation | movement at the time of a cover body moving between a closed position and an open position. It is a perspective view which shows the example of whole structure of the keyboard musical instrument provided with the cover body opening / closing structure concerning 2nd Embodiment of this invention. It is a figure which shows the detailed structure of the cover body opening / closing structure concerning 2nd Embodiment, (a) is the elements on larger scale which show one side part of a main-body part, (b) shows X part of (a). It is a partial enlarged view. It is a figure for demonstrating the operation | movement at the time of a cover body moving from a closed position to an open position. It is a figure which shows the structural example of the friction part provided in the slide mechanism. It is a figure which shows the detailed structure of the cover body opening / closing structure concerning 3rd Embodiment of this invention, and is a sectional side view of a keyboard musical instrument. It is a figure which shows the cover body opening-closing structure concerning 4th Embodiment of this invention, and is a sectional side view of a keyboard musical instrument. It is a figure which shows the detailed structure of the cover body opening / closing structure concerning 4th Embodiment, and is the elements on larger scale which show one side part of the main-body part in a keyboard musical instrument.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[First Embodiment]
1 and 2 are perspective views showing an example of the overall configuration of a keyboard instrument 1 having a lid opening / closing structure according to the first embodiment of the present invention. FIG. 2 is a diagram showing a detailed configuration of the lid opening / closing structure according to the first embodiment, and is a side sectional view of the keyboard instrument 1. 2A shows a state in which a lid 20 described later is in an open position, and FIG. 2B shows a state in which the lid 20 is in a closed position. A keyboard instrument 1 of the present embodiment includes a main body 2 having a case 10 and a keyboard 5 installed in the case 10, and a lid (keyboard lid) 20 attached to the case 10 of the main body 2. It has. In the following description, the horizontal direction or the width direction indicates the left-right direction in which the keys 5a and 5b of the keyboard 5 are arranged, and the front or back indicates the front side (player side) of the keyboard 5. Or the back side shall be shown.

  The keyboard 5 has a plurality of black keys 5a and white keys 5b arranged in the horizontal direction. The case 10 that houses the keyboard 5 includes a pair of side plates (side walls) 6 and 6 that cover the left and right sides of the keyboard 5, a front plate 7 that covers the front side of the keyboard 5, and a rear plate 8 that covers the rear side. And the bottom plate 9 covering the bottom side, and the whole is formed in a horizontally long substantially rectangular parallelepiped shape. The upper surface side of the case 10 is an opening through which the upper surface of the keyboard 5 is exposed. The lid 20 is attached to the case 10 so as to be movable between a closed position that completely closes the opening and an open position that completely opens the opening. The lid 20 is a single plate-like member that closes the opening in a state of being placed on the upper end surfaces 6 a and 6 a of the pair of side plates 6 and 6, and the outer shape thereof is a horizontally long rectangular shape that follows the outer shape of the case 10. It is in the shape. Near the front end of the inner surface (lower surface) 20 c of the lid 20, a front lid (lid front plate) 21 that covers the front surface of the keyboard 5 above the front plate 7 is attached. In the above description, the side plates 6 and 6 have a square shape when viewed from the side, and the upper end surfaces 6a and 6a are substantially horizontal from the rear to the front of the main body 2 (that is, the playing surface of the keyboard 5 and Although the case where the shape is substantially parallel to the longitudinal direction of the keys 5a and 5b has been shown, other detailed illustrations are omitted, but the side plates 6 and 6 have a substantially trapezoidal shape when viewed from the side. And the upper end surfaces 6a and 6a may be formed in the inclined plane shape which inclines so that it may descend | fall toward the front from the back of the main-body part 2. FIG.

  In addition, the lid 20 between the pair of side plates 6 and 6 covering both sides of the keyboard 5 and the left and right ends 20d and 20d of the lid 20 facing the keyboard 20 with respect to the main body 2 is provided. A connecting mechanism 30 is provided which is connected so as to be movable. In the keyboard instrument 1 of the present embodiment, the coupling mechanisms 30 and 30 are a pair of attachments attached between the pair of side plates 6 and 6 and the ends 20d and 20d of the lid body 20 on both sides in the arrangement direction of the keys 5a and 5b. The connection tools 31, 31 are provided. The pair of couplers 31 and 31 have a symmetrical shape and mounting structure. Here, the end portion 20d of the lid 20 refers to a portion including both end surfaces in the width direction of the lid 20 and the inner surface 20c and outer surfaces in the vicinity thereof (portions surrounded by dotted lines in the drawings and the vicinity thereof). It is shown.

  As shown in FIG. 2, the connector 31 is a long plate-like member, and one end portion 31 a in the longitudinal direction is pivotally supported by a first pivotal support portion 33 provided on the inner side surface 6 c of the side plate 6. The other end 31b is pivotally supported at the end 20d of the lid 20 by a second pivotal support 35 provided on the inner surface 20c of the lid 20 facing the keyboard 5 side. The first shaft support portion 33 supports one end portion 31a of the connector 31 so as to be rotatable around a rotation axis whose axial direction is the width direction of the main body portion 2 with respect to the inner surface 6c of the side plate 6 (link support). doing. In addition, the second shaft support portion 35 supports the other end portion 31b of the connector 31 with respect to the inner surface 20c of the lid body 20 so as to be rotatable around a rotation axis whose axial direction is the width direction of the lid body 20 (link). Support). Specifically, the first shaft support portion 33 pivotally supports the end portion 31 a of the connector 31 with a torque generating type bearing 32 fixed to the inner side surface 6 c of the side plate 6. The torque generation type bearing 32 will be described later. Further, the second shaft support portion 35 supports the end portion 31b of the connector 31 with a support piece 34a provided on the mounting plate 34 fixed to the inner surface 20c of the lid 20 with a screw.

  The connector 31 has a thin plate shape whose longitudinal direction extends from the first shaft support portion 33 toward the second shaft support portion 35, and an intermediate portion between the first shaft support portion 33 and the second shaft support portion 35 is substantially within a plane. The bent portion 31c is bent in a “<” shape. The connector 31 is attached with its surface parallel to the inner surface 6c of the side plate 6 and with the inside of the bent portion 31c facing upward. Further, the first shaft support portion 33 is disposed below and in front of the second shaft support portion 35 (lower side and front side of the main body portion 2).

  The torque generating type bearing 32 installed on the first shaft support 33 is not shown in detail in the drawing and description of the structure. For example, a cylindrical housing filled with hydraulic oil and a housing inside the housing are provided. And a rotating damper mechanism (oil damper mechanism) configured to have a braking force against the rotation of the rotating member by a sliding resistance caused by hydraulic pressure of the hydraulic oil. be able to. For example, a bearing having a structure disclosed in Japanese Patent Application Laid-Open No. 2001-349364, Japanese Patent Application Laid-Open No. 2008-185215, or the like can be used as the torque generation type bearing 32 formed of such a rotary damper mechanism. The torque generating type bearing 32 is a component that functions as a resistance generating unit that generates a resistance against relative rotation between the main body 2 or the lid 20 and the connector 31.

  The bearing 32 may be a rotary damper mechanism (rotational friction mechanism) that generates a frictional force by sliding a plurality of resin parts installed around the shaft, instead of the oil damper mechanism. This rotational friction mechanism generates a large frictional force only in one direction of rotation, and is also referred to as a damper mechanism (this is a “one-way clutch mechanism”) that generates a larger frictional force as the rotational speed increases. . ) May be used. And when using such a damper mechanism, if it installs so that a big frictional force may be generated in the direction which moves lid 20 from an open position toward a closed position, movement of lid 20 which moves to a closed position Therefore, when the lid 20 is closed, the risk of a finger or the like being sandwiched between the lid 20 and the upper end surface 6a of the side plate 6 can be reduced.

  Further, in the lid opening / closing structure of the present embodiment, when the lid 20 moves between the closed position and the open position, the rear end 20a of the lid 20 is connected to the upper end surface 6a of the side plate 6 (the main body 2). The slide mechanism 40 is configured so as to slide along the upper surface. The slide mechanism 40 includes an upper end surface 6a of the side plate 6 and a rear end portion 20a of the lid body 20, and a rear end portion of the lid body 20 that is in contact with the upper end surface 6a of the side plate 6 in a state where it can be separated. 20a is the structure which slidably contacts with the upper end surface 6a of the side plate 6 in the front-back direction. Here, the upper end surface 6 a of the side plate 6 extends in the front-rear direction of the main body 2 substantially parallel to the longitudinal direction of the white key 5 b and the black key 5 a and the performance surface (upper surface) of the keyboard 5. Therefore, when the lid 20 moves from the closed position to the open position, the slide mechanism 40 causes the rear end portion 20a of the lid 20 to move in the longitudinal direction of the keys 5a and 5b from the rear side to the front side ( It is designed to move (substantially parallel to the playing surface of the keyboard 5). Here, the performance surface of the keyboard 5 refers to a rough horizontal surface including the upper surface side of the keys 5a and 5b that the performer touches with a finger. Depending on the form of the keyboard 5, the upper surface of the keys 5a and 5b. May be slightly inclined in the front-rear direction of the main body 2, but even in such a case, a rough horizontal plane including the upper surface side of the keyboard 5 is indicated.

  Moreover, the stopper part 37 for stopping the movement of the coupling tool 31 in the state which has the cover body 20 in an open position is provided. The stopper portion 37 is provided with a rod-like locking tool (pin) 37 a erected on the inner side surface 6 c of the side plate 6. The locking tool 37a protrudes from the inner surface 6c of the side plate 6 in the lateral direction (horizontal direction). Then, when the locking member 37a abuts on the bent portion 31c of the connecting tool 31 in the open position where the lid 20 is completely opened, the rotation of the connecting tool 31 around the first shaft support portion 33 is at that position. Being regulated.

  A musical score holder 51 is attached to the inner surface 20 c of the lid 20. The musical score holder 51 is made of a thin plate-like member, and is attached to the center in the width direction on the inner surface 20c of the rear end portion 20a of the lid 20. The musical score holder 51 is supported at its end on the lid 20 side so as to be rotatable with respect to the inner surface 20c of the lid 20 by a shaft portion 51a. The shaft portion 51 a supports the musical score holder 51 so as to be rotatable about an axis extending in the lateral direction (width direction) of the main body 2. As a result, the musical score holder 51 is folded in such a manner that its surface is along the inner surface 20c of the lid body 20 with the shaft portion 51a as the center, and the surface thereof is substantially orthogonal to the inner surface 20c of the lid body 20. It can be freely rotated between the opened position and the open position.

  On the other hand, a plate-like panel member 55 is installed on the rear side of the keyboard 5 in the case 10 of the main body 2. A hidden plate 56 is attached between the rear end of the panel member 55 and the upper end of the rear plate 8 of the case 10 to close these gaps. The panel member 55 has a panel surface 55 b that covers the upper surface on the rear side of the keyboard 5. The panel surface 55 b is an inclined curved surface that is slightly curved in the front-rear direction of the main body 2, and is disposed at a portion corresponding to the musical score holder 51 attached to the inner surface 20 c of the lid 20. Then, as will be described later, when the lid 20 moves to the closed position that closes the upper surface side of the keyboard 5, the musical score receiver 51 is automatically folded by the front end portion 51b of the musical score receiver 51 coming into contact with the panel surface 55b. It is supposed to be.

  Further, as shown in FIG. 1, the panel member 55 has both end portions in the width direction fixed to the inner side surfaces 6 c and 6 c of the side plates 6 and 6. And as shown in FIG.5 (b), the connection tool 31 is penetrated between the inner surface 6c of the side plate 6 in the both ends (only one is shown in FIG.5 (b)) of the panel member 55. A cut portion 55c is formed for this purpose. Thereby, the connection tool 31 protrudes upward from the lower side of the panel member 55 through the notch portion 55 c, and the end portion 31 b ahead is connected to the inner surface 20 c of the lid body 20.

  FIG. 3 is a diagram for explaining an operation when the lid 20 moves between the closed position and the open position. In FIG. 3, only main components related to the opening / closing operation of the lid body 20 such as the connector 31 and the stopper portion 37 are illustrated. Hereinafter, the opening / closing operation of the lid 20 by the lid opening / closing structure having the above configuration will be described with reference to FIG. 3 and FIG. First, in the state shown in FIG. 2B, the lid 20 is in a closed position in which the upper part of the keyboard 5 in the case 10 is completely closed. In this state, the inner surfaces 20c of both end portions 20d and 20d of the lid 20 are placed on the upper end surfaces 6a and 6a of the side plates 6 and 6, respectively. When the front end 20b of the lid 20 is lifted upward from this state, the lid 20 rotates in the order of FIGS. 3A, 3B and 3C, and the upper side of the keyboard 5 in the case 10 is opened. It will be written. At this time, the second shaft support portion 35 of the coupler 31 rotates toward the front side with the first shaft support portion 33 as a fulcrum, and the rear end portion 20a of the lid body 20 extends from the rear along the upper end surface 6a of the side plate 6. Slide forward. As a result, the front end 20b of the lid 20 rotates upward with the second shaft support 35 as a fulcrum. Finally, as shown in FIGS. 3 (d) and 2 (a), the operation of the coupling tool 31 and the lid 20 is performed at a position where the coupling tool 31 abuts on the locking tool 37 a of the stopper portion 37. Stops. At this position, the lid 20 is in an open position where it is completely opened. In this open position, the lid 20 erected on the upper surface of the main body 2 has a rear end 20a positioned slightly in front of the front end 20b and an inner surface 20c slightly rearward from the bottom to the top. It is in a state inclined to.

  On the other hand, when the front end 20b of the lid 20 in the open position shown in FIGS. 2A and 3D is pulled toward the near side, the lid 20 moves toward the closed position. In this case, contrary to the above, the lid 20 rotates in the order of FIGS. 3C, 3B, and 3A, and the upper portion of the keyboard 5 in the case 10 is closed. At this time, the second shaft support portion 35 of the connector 31 rotates rearward with the first shaft support portion 33 as a fulcrum, and the rear end portion 20a of the lid body 20 moves forward along the upper end surface 6a of the side plate 6. Slide backward from As a result, the front end 20b of the lid 20 rotates downward with the second shaft support 35 as a fulcrum. Finally, as shown in FIG. 2 (b), the lid 20 is covered with the inner surfaces 20c of the end portions 20d and 20d on the upper end surfaces 6a and 6a of the side plates 6 and 6, respectively. The body 20 is in a closed position in which the upper part of the keyboard 5 is completely closed.

  During the transition from the state shown in FIG. 3A to the state shown in FIG. 2B, the load acting on the coupling mechanism 30 is increased by the weight of the lid 20. For this reason, it is desirable to set the frictional force generated in the bearing 32 within the above range. As the bearing 32 having such a setting, a rotary friction mechanism that generates a frictional force by sliding the resin member described above may be used, or the above-described one-way clutch mechanism may be used.

  In the lid opening / closing structure of the present embodiment, one end 31a is pivotally supported by a first pivotal support 33 provided on the side plate 6 and the other end 31b is provided on the inner surface 20c of the lid 20. When the lid plate 20 is moved between the closed position and the open position, the rear end portion 20a of the lid body 20 is connected to the main body portion 2 when the long plate-like coupling tool 31 pivotally supported by the shaft support portion 35 and the lid body 20 are moved. And a slide mechanism 40 configured to slide in the front-rear direction. When the lid 20 moves from the closed position to the open position, the rear end portion 20a of the lid 20 slides in the longitudinal direction of the keys 5a and 5b from the rear side toward the front side. . Thereby, the center of gravity movement of the lid 20 at the time of opening and closing can be suppressed while the simple mechanism in which the number of parts of the connecting mechanism 30 that connects the main body 2 of the keyboard instrument 1 and the lid 20 is reduced. Therefore, it is possible to prevent the posture of the lid body 20 from changing suddenly during opening and closing, and the lid body 20 can be easily opened and closed.

  In the coupling mechanism 30 of the present embodiment, the first shaft support portion 33 is disposed at a position closer to the front side of the main body portion 2 than the second shaft support portion 35. With this configuration, the lid 20 can be moved more smoothly between the closed position and the open position while reducing the size of the coupling mechanism 30.

  Further, the lid opening / closing structure of the present embodiment includes a pair of side plates 6 and 6 provided on both sides of the keyboard 5 in the case 10, and the coupling mechanism 30 includes the pair of side plates 6 and 6 and the lid 20. A pair of couplers 31 and 31 are formed by connecting the two end portions 20d and 20d. The slide mechanism 40 is in contact with the upper end surfaces 6a and 6a of the pair of side plates 6 and 6 in a separable state. The rear end portions 20a and 20a of the lid body 20 that comes into contact are configured to be in sliding contact with the upper end surfaces 6a and 6a of the pair of side plates 6 and 6, respectively.

  As described above, the slide mechanism 40 is configured by the upper end surface 6a of the side plate 6 and the rear end portion 20a of the lid body 20, so that the slide mechanism 40 can smoothly open and close the lid body 20, but the slide mechanism 40 By not requiring 40 dedicated parts, the number of parts of the coupling mechanism 30 can be reduced, and the configuration of the keyboard instrument 1 can be simplified and the cost can be reduced.

  Further, the lid opening / closing structure of the present embodiment includes a stopper portion 37 (locking tool 37a) that comes into contact with the coupling tool 31 and stops its movement while the lid body 20 is in the open position. The lid 20 in the open position is erected on the upper surface of the main body 2 with the rear end 20a inclined so that the rear end 20a is located on the front side of the main body 2 relative to the front end 20b.

  As described above, the lid 20 is reliably stopped at the open position by stopping the movement of the locking tool 37a of the stopper portion 37 in contact with the coupling tool 31 in the state where the lid 20 is at the open position. The opening / closing operation of the lid 20 can be stabilized. Further, the rear end portion 20a of the lid body 20 and the upper end surface 6a of the side plate 6 can be regulated so as not to be separated at the open position. Thereby, it can prevent that the cover body 20 falls back in an open position. Further, it is possible to prevent a finger or the like from being sandwiched between the rear end portion 20 a of the lid 20 and the upper end surface 6 a of the side plate 6.

  Further, in this case, the lid 20 is erected on the upper surface of the main body 2 in the opened position with the rear end 20a inclined so that the rear end 20a is located on the front side of the main body 2 relative to the front end 20b. The lid 20 can be stably stopped at the open position. Therefore, it is possible to more reliably prevent the lid 20 in the open position from being inadvertently moved and closed toward the closed position.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the description of the second embodiment and the corresponding drawings, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted below. In addition, matters other than those described below are the same as those in the first embodiment. This is the same in other embodiments.

  FIG. 4 is a perspective view showing an example of the entire configuration of a keyboard instrument 1-2 having a lid opening / closing structure according to the second embodiment of the present invention. FIG. 5 is a diagram showing a detailed configuration of the lid opening / closing structure according to the second embodiment, wherein (a) is a partially enlarged perspective view showing one side portion of the main body 2, and (b) is ( It is the elements on larger scale which show X part of a).

  In the lid opening / closing structure of the present embodiment, instead of the slide mechanism 40 having a configuration in which the rear end portion 20a of the lid body 20 is in sliding contact with the upper end surface 6a of the side plate 6 provided in the lid opening / closing structure of the first embodiment, As shown in FIG. 5B, a guide member 43 having a linear guide groove (concave portion) 43a provided on the side plate 6 side, and a slide member having a slide protrusion (convex portion) 45a provided on the lid 20 side. 45, and a slide mechanism 40-2 formed by fitting the slide protrusion 45a in a slidable state in the guide groove 43a.

  Each of the guide member 43 and the slide member 45 is made of a synthetic resin molded product having a smooth surface. The guide member 43 is a substantially rectangular member attached to the inner surface 6 c of the side plate 6. The guide groove 43a is a groove portion having a substantially U-shaped cross section, and its longitudinal direction extends substantially horizontally along the longitudinal direction of the keys 5a and 5b in the front-rear direction of the main body portion 2. On the other hand, the slide member 45 is rotatably attached to an attachment plate 34 fixed to the lid body 20, and moves in the front-rear direction of the main body 2 with the opening / closing operation of the lid body 20. . The slide protrusion 45a is a protrusion having a substantially U-shaped cross section that is slidably fitted into the guide groove 43a. The guide groove 43a has a length dimension in which the slide protrusion 45a is fitted over the entire area when the lid 20 moves from the closed position to the open position.

  FIG. 6 is a diagram for explaining an operation when the lid 20 moves from the closed position to the open position in the lid opening / closing structure of the present embodiment. In addition, in the same figure, the locus | trajectory of the cover body 20 at the time of moving from a closed position to an open position is shown continuously. First, when the front end 20b of the lid 20 in the closed position (A) in the figure is lifted upward, the lid 20 rotates and the upper side of the keyboard 5 is opened. At this time, the second shaft support portion 35 of the connector 31 rotates forward and upward with the first shaft support portion 33 as a fulcrum, and the slide protrusion 45a of the slide mechanism 40-2 shown in FIG. By sliding horizontally from the rear side to the front side of the main body portion 2 along the groove 43a, the rear end portion 20a of the lid 20 slides from the rear side to the front side along the upper end surface 6a of the side plate 6. As a result, the front end 20b of the lid 20 rotates upward with the second shaft support 35 as a fulcrum. Finally, the operation of the connection tool 31 and the lid 20 is stopped at the position where the connection tool 31 comes into contact with the locking tool 37a of the stopper portion 37. At this position, the lid 20 is in the open position (B) where it is completely opened. In the closed position (B), as in the first embodiment, the rear end portion 20a of the lid body 20 is located slightly in front of the front end portion 20b, and the inner surface 20c of the lid body 20 is directed from the bottom to the top. It is in a state inclined slightly to the rear.

  On the other hand, when the front end 20b of the lid 20 at the open position (B) in FIG. 6 is pulled toward the near side, the lid 20 moves toward the closed position (A), and the upper side of the keyboard 5 in the case 10 is It will be closed. At this time, the second shaft support portion 35 of the connector 31 rotates rearward and downward with the first shaft support portion 33 as a fulcrum, and the rear end portion 20a of the lid body 20 faces the upper end surface 6a of the side plate 6. Slide along the front to back. As a result, the front end 20b of the lid 20 rotates downward with the second shaft support 35 as a fulcrum. Finally, the lid 20 completely closed the upper side of the keyboard 5 with both end portions 20d and 20d of the inner surface 20c of the lid 20 being placed on the upper end surfaces 6a and 6a of the side plates 6 and 6, respectively. Closed position (A).

  As described above, in the lid opening / closing structure of the present embodiment, as shown in FIG. 5 and the like, the guide member 43 having the guide groove (recess) 43a installed in the side plate 6 and the slide protrusion (convex) installed in the lid 20 are provided. Part) The slide mechanism 40-2 comprised with the slide member 45 which has 45a is provided. The slide mechanism 40-2 has a configuration in which the slide protrusion 45a is fitted in the guide groove 43a so that they slide without being separated from each other. Thereby, smoother opening / closing operation | movement of the cover body 20 is realizable. Further, when the lid 20 moves between the closed position and the open position, the distance between the upper end surface 6a of the side plate 6 and the rear end portion 20a of the lid 20 is always kept constant. It is possible to effectively prevent a finger or the like from being caught in Further, it is possible to prevent twisting and distortion from occurring in the connector 31 that connects the side plate 6 and the lid 20.

  FIG. 7 is a diagram illustrating a configuration example when a resistance force generation unit is provided in the slide mechanism 40-2. In the slide mechanism 40-2 of this embodiment, as shown in FIG. 7A, the inner surface of the guide groove 43a of the guide member 43 is used as a resistance generation unit for generating a resistance against the movement of the lid 20. The friction surfaces 46a and 46b formed in the above can be provided. The friction surfaces 46a, 46b are provided on the front and rear end portions 43c, 43d of the guide member 43 and the inner surface of the guide groove 43a in the vicinity thereof, and are surfaces obtained by roughing the surface of the guide groove 43a. In the portion where the friction surfaces 46a and 46b are provided, the sliding resistance of the slide protrusion 45a is set to be larger than that in the other portions.

  In addition, as another configuration example of the resistance force generating portion, as illustrated in FIG. 7B, inclined surfaces 47a and 47b in which the inner surface of the guide groove 43a is slightly inclined along the sliding direction can be provided. The inclined surfaces 47a and 47b are surfaces in which the width dimension between the upper and lower inner surfaces of the guide groove 43a is gradually narrowed toward the both end portions 43c and 43d of the guide member 43. Compared with the other portions, the portion provided with the inclined surfaces 47a and 47b has a smaller width of the guide groove 43a through which the slide protrusion 45a passes, so that the sliding resistance of the slide protrusion 45a is increased. It is set to be.

  The friction surfaces 46 a and 46 b or the inclined surfaces 47 a and 47 b are provided at the friction surface 46 a or the inclined surface 47 a provided at the rear end portion 43 d of the guide member 43 corresponding to the closed position of the lid 20 and the open position of the lid 20. It is preferable to provide at least one of the friction surface 46b and the inclined surface 47b provided at the front end portion 43c of the corresponding guide member 43, or both of them. In that case, the friction surface 46 or the inclined surface 47 is not provided at a location corresponding to the middle between the closed position and the open position of the lid 20. Thereby, it can be configured that a resistance force to the movement of the lid body 20 is generated only at the open position and the closed position where a heavy load is applied to the operator when the lid body 20 is opened and closed and in the vicinity thereof.

  According to the resistance force generation unit including the friction surface 46 or the inclined surface 47 provided in the slide mechanism 40-2 of the present embodiment, the open position and the closed position where a large load is applied to the operator when the lid 20 is opened and closed, and the vicinity thereof. Thus, a resistance force against the movement of the lid 20 can be generated, so that the load on the operator of the lid 20 can be effectively reduced. Therefore, the opening / closing operation of the lid 20 can be smoothly performed with less force. In addition, it is possible to more effectively prevent a finger or the like from being caught in the gap between the lid 20 and the main body 2, and even if a finger or the like is caught, the pinching force can be reduced. In addition, when the resistance generating part which consists of the friction surface 46 or the inclined surface 47 provided in said sliding mechanism 40-2 is provided, the installation of the torque generation type bearing 32 can also be abbreviate | omitted.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. FIG. 8 is a diagram showing a detailed configuration of the lid opening / closing structure according to the third embodiment of the present invention, and is a side sectional view of the keyboard instrument 1-3. In the lid opening / closing structure of the present embodiment, a coil spring (elastic member) 60 that generates a biasing force that biases the lid 20 in the direction of moving to the open position is attached between the connector 31 and the main body 2. ing. The coil spring 60 has one end 60 a attached to the connector 31 and the other end 60 b attached to the inner side surface 6 c of the side plate 6. Thereby, the coil spring 60 is stretched between the main body 2 and the connector 31. Specifically, the end 31a on the first shaft support portion 33 side of the connector 31 is formed as a base of a substantially isosceles triangle having the bent portion 31c as the apex, and is formed at one corner of the base. A single shaft support portion 33 is disposed, and an end portion 60a of the coil spring 60 is attached to the other corner portion. Further, the end portion 60 a on the coupling tool 31 side of the coil spring 60 is fixed at a position on the front side of the main body portion 2 with respect to the end portion 60 b on the main body portion 2 side. Thereby, the connection tool 31 is urged in the direction in which the lid 20 is moved to the open position by the tensile force of the coil spring 60.

  In the lid opening / closing structure of the present embodiment, the lid 20 is opened by the tensile force of the coil spring 60 both when the lid 20 moves from the closed position to the open position and when it moves from the open position to the closed position. The connector 31 is urged in the direction toward the position. Thereby, coupled with the action of the torque generating type bearing 32, a resistance force is generated against relative rotation between the main body 2 and the coupling tool 31 and between the lid body 20 and the coupling tool 31. The opening / closing operation of the body 20 becomes slow. Therefore, it becomes possible to more effectively prevent a finger or the like from being sandwiched between the lid 20 and the main body 2. In addition, even if a finger or the like is sandwiched between the lid 20 and the main body 2, the sandwiching force can be reduced. Further, since the lid 20 can be prevented from moving suddenly in the opening / closing operation of the lid 20, the opening / closing operation of the lid 20 can be further stabilized.

  In addition, the attachment position of the coil spring 60 with respect to the coupling tool 31 is a position other than the first shaft support part 33 and the second shaft support part 35 in the connection tool 31 and urges the lid body 20 in the direction of moving to the open position. Any position other than the above may be used as long as it generates a strong urging force.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. 9 and 10 are views showing a keyboard instrument 1-4 having a lid opening / closing structure according to a fourth embodiment of the present invention. FIG. 9 is a side sectional view of the keyboard instrument 1-4, and FIG. FIG. 4 is a partially enlarged perspective view showing one side portion of the main body 2 in the keyboard instrument 1-4. In the lid opening / closing structure of the present embodiment, instead of the mounting plate 34 attached to the inner surface 20c of the lid 20 provided in the lid opening / closing structure of the first embodiment, the lid 20 is attached to the end face 20e in the width direction. The other attachment plate 38 is provided, and the end portion 31 b of the connector 31 is pivotally supported with respect to the lid body 20 via the attachment plate 38. In other words, the second shaft support portion 35 of the present embodiment has a support piece (excluding a portion attached to the end surface 20e of the lid plate 20 except for a portion attached to the attachment plate 38 fixed to the end surface 20e in the width direction of the lid 20 The end 31b of the connector 31 is pivotally supported by a projecting piece 38a toward the inner surface 20c.

  In the first embodiment, the inner surface 20c of both end portions 20d and 20d of the lid 20 is placed on the upper end surfaces 6a and 6a of the side plates 6 and 6 in a state where the lid 20 is in the closed position. In contrast, in the present embodiment, the inner surface 20c of both end portions 20d and 20d of the cover plate 20 is attached to the inner surfaces 6c and 6c of the side plates 6 and 6 in a state where the cover 20 is in the closed position. It is configured to be placed on the upper end surfaces 39a, 39a of the lid stopper plates 39, 39. 9 and 10, only one side plate 6 and the lid stop plate 39 are shown.

  As shown in FIG. 10, the mounting plate 38 is a strip-like plate-like member, and its root side is fixed to the end surface 20 e in the width direction of the lid plate 20 with a screw (not shown), and its tip side is A support piece 38 a for projecting toward the inner surface 20 c side of the lid plate 20 and supporting the connector 31 is formed. In the case shown in FIG. 10, a recess for the mounting plate 38 is formed on the end surface 20e of the lid plate 20, and the mounting plate 38 is fixed in the recess. This prevents the mounting plate 38 from protruding from the end surface 20e of the lid plate 20. In addition to this, although not shown, it is also possible to provide a slight gap between the end face 20e of the lid plate 20 and the side plate 6 and arrange the mounting plate 38 in this gap. The shape and the shaft support structure of the support piece 38a are the same as the support piece 34a of the first embodiment.

  On the other hand, the lid stopper plate 39 attached to the inner side surface 6c of the side plate 6 is a plate-like member having a thickness equivalent to that of the side plate 6, for example, and its upper end surface 39a is flat. The upper end surface 39a is attached so as to extend along the longitudinal direction of the keys 5a and 5b at a position lower than the upper end surface 6a of the side plate 6 by the thickness dimension of the lid plate 20. The lid stopper plate 39 is fixed to the inner surface 6c of the side plate 6 with a plurality of screws (not shown). Further, between the inner side surface 6 c of the side plate 6 and the lid stopper plate 39, an accommodating portion 39 b for accommodating the connector 31 and the support piece 38 a of the mounting plate 38 is formed. The accommodating portion 39 b is formed of a rectangular opening formed between the inner surface 6 c of the side plate 6 and a recess provided in the lid stopper plate 39. The accommodating portion 39b allows the coupling tool 31 to be inserted from the lower side to the upper side of the lid stopper plate 39, and accommodates the support piece 38a of the mounting plate 38 in a state where the lid 20 is in the closed position. Yes. In the lid opening / closing structure of the present embodiment, the side plate 6 and the lid stopper plate 39 constitute a sidewall portion according to the present invention, and the “upper end surface of the sidewall portion” in the present invention is the lid stopper plate. The upper end surface 39a of 39 corresponds to this.

  In the lid opening / closing structure with the above configuration, in the state shown in FIG. 9B, the lid 20 is in the closed position where the upper part of the keyboard 5 in the case 10 is completely closed. In this state, the inner surface 20c of the end portion 20d of the lid 20 is placed on the upper end surface 39a of the lid stopper plate 39, and the outer surface (upper surface) 20g of the lid plate 20 is flush with the upper end surface 6a of the side plate 6. It is a continuous surface.

  When the front end 20b of the lid 20 is lifted upward from this state, the lid 20 rotates and the upper side of the keyboard 5 in the case 10 is opened. At this time, when the first shaft support portion 33 is pivoted so that the second shaft support portion 35 side of the coupling tool 31 is directed to the front side, the rear end portion 20a of the lid body 20 is moved to the upper end surface 39a of the lid stopper plate 39 (in detail). Is slid from the rear to the front along a part of the rear side of the upper end surface 39a. As a result, the front end 20b of the lid 20 rotates upward with the second shaft support 35 as a fulcrum. And finally, as shown to Fig.9 (a), the intermediate part of the connection tool 31 contact | abuts to the locking tool 37a of the stopper part 37, and operation | movement of the connection tool 31 and the cover body 20 stops. At this position, the lid 20 is in an open position where it is completely opened.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, in the above-described embodiment, a desktop keyboard instrument is shown as the keyboard instrument 1 to which the lid opening / closing structure is applied. However, the lid opening / closing structure according to the present invention has a leg portion in addition to the desktop keyboard instrument. It is also possible to apply to a self-supporting (large-sized) keyboard instrument equipped with the.

  Further, in each of the above-described embodiments, the second shaft support portion 35 provided at the end portion 20 d in the width direction of the lid plate 20 is the rear end portion 20 a side of the inner surface 20 c of the lid plate 20 or the end surface 20 e of the lid plate 20. The second shaft support portion 35 is provided at the end portion 20d in the width direction of the lid plate 20 (the arrangement direction of the keys 5a and 5b). It is also possible to arrange in locations other than those shown in the above embodiment. For example, you may provide in the intermediate position of the rear-end part 20a and the front-end part 20b in the inner surface 20c of the cover board 20, the intermediate position of the rear-end part 20a and the front-end part 20b in the end surface 20e of the cover board 20, etc.

  Moreover, in the said embodiment, although the case where the connection mechanisms 30 and 30 were provided between the side plates 6 and 6 of the both sides of a case and the edge parts 20d and 20d of the both sides of the width direction of the cover body 20 was shown, As long as the lid can be slid, the coupling mechanism according to the present invention can be provided only for one end of the lid in the width direction.

DESCRIPTION OF SYMBOLS 1 ... Keyboard instrument, 2 ... Main-body part, 5 ... Keyboard, 6 ... Side plate (side wall part), 6a ... Upper end surface, 6c ... Inner side surface, 10 ... Case, 20 ... lid, 20a ... rear end, 20b ... front end, 20c ... inner surface (surface on the keyboard 5 side), 20d ... end (end in the key arrangement direction) 20e ... end face, 20g ... outer surface, 30 ... coupling mechanism, 31 ... coupling tool, 33 ... first shaft support, 35 ... second shaft support, 37 ... stopper 40, slide mechanism, 43 ... guide member, 43a ... guide groove (concave), 45 ... slide member, 45a ... slide projection (convex), 46 (46a, 46b) ... Friction surface (resistance force generation part), 47 (47a, 47b) ... Inclined surface (resistance force generation part), 60 ... Coil spring (elastic member) )

Claims (8)

A main body having a case and a keyboard composed of a plurality of keys installed in the case;
A plate-like lid attached to the case so as to be movable between a closed position for closing the upper side of the keyboard and an open position for opening the upper side of the keyboard;
A lid opening / closing structure for a keyboard instrument, comprising: a side wall portion disposed on a side portion of the keyboard in the case; and a coupling mechanism for coupling an end portion of the lid body facing the key in the arrangement direction of the keys. Because
The coupling mechanism is
A long connector having one end pivotally supported by a first pivotal support provided on the side wall, and the other end pivotally supported by a second pivotal support provided on the end of the lid;
A slide mechanism configured such that when the lid moves between the closed position and the open position, a rear end portion of the lid slides in the front-rear direction of the main body, and
A keyboard configured such that when the lid body moves from the closed position to the open position, a rear end portion of the lid body slides from the rear side toward the front side in the longitudinal direction of the key. Opening and closing structure of the instrument lid. 2. The lid opening / closing structure for a keyboard instrument according to claim 1, wherein the second shaft support portion is provided on an inner surface facing the keyboard side at the end of the lid. 3. The lid opening / closing structure for a keyboard instrument according to claim 1, wherein the first shaft support portion is disposed at a position closer to the front side of the main body portion than the second shaft support portion. The side walls are a pair of side walls provided on both sides of the keyboard in the case,
The coupling mechanism includes a pair of the coupling tools configured to couple between the pair of side wall portions and the end portions on both sides of the lid in the key arrangement direction.
The slide mechanism is configured such that the rear end portion of the lid that comes into contact with the upper end surfaces of the pair of side wall portions is in sliding contact with the upper end surfaces of the pair of side wall portions. The lid opening / closing structure for a keyboard instrument according to any one of claims 1 to 3. In the state where the lid is in the open position, a stopper portion that comes into contact with the connector and stops its movement,
The lid in the open position is erected on the upper surface of the main body in a state where the rear end is inclined so that the rear end is positioned on the front side of the main body from the front end. 5. A lid opening / closing structure for a keyboard instrument according to any one of claims 1 to 4. The slide mechanism includes a recess extending in the front-rear direction of the main body provided on one of the side wall and the lid, and a convex provided on the other of the side wall and the lid. 4. The lid opening / closing structure of a keyboard instrument according to claim 1, further comprising a mechanism in which the convex portion is fitted in the slidable state with respect to the concave portion. 5. The elastic member which produces the urging | biasing force which urges | biases the said cover in the direction which moves to the said open position was attached between the said connection tool and the said main-body part. 2. A lid opening / closing structure for a keyboard instrument according to item 1. There is a relative rotation between the main body part or the lid body and the coupling tool between at least one of the first shaft support part and the second shaft support part, or between the concave part and the convex part of the slide mechanism. The lid opening / closing structure for a keyboard instrument according to any one of claims 1 to 7, further comprising a resistance force generation unit that generates a resistance force against movement.

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