JP3652881B2 - Opening and closing structure of the keyboard lid of the keyboard instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a keyboard lid opening / closing structure of a keyboard instrument for opening / closing a keyboard lid such as an electronic piano or an organ.
[0002]
[Prior art]
As an open / close structure of a keyboard cover of a conventional electronic piano, a slide open / close type is often used, and is disclosed in, for example, Japanese Utility Model Publication No. 7-49511. As shown in FIG. 5, in this opening / closing structure, a pair of left and right pinions 53 (only one is shown) are provided at both ends of a rotary shaft 52 provided at the rear end of the keyboard lid 51, and outward from the pinion 53. The protruding part of the rotating shaft 52 is a guide protrusion 54. On the other hand, on the inner surfaces of the left and right arms 56 (only one shown) of the piano body 55, a rack 58 and a guide groove 59 are formed in the rear half thereof, that is, below the upper roof 57 so as to extend in the front-rear direction. A pinion 53 and a guide protrusion 54 are engaged with the rack 58 and the guide groove 59, respectively.
[0003]
The upper roof 57 has a front portion that is bent obliquely downward and faces the front side of the front end of the guide groove 59 from above, and an operation panel 60 is disposed below the upper roof 57. With this configuration, the keyboard lid 51 is slid in the front-rear direction through the gap between the upper roof 57 and the operation panel 60 by the pinion 53 and the guide protrusion 54 being guided by the rack 58 and the guide groove 59. Between the closed position that is drawn out from the piano body 55 and covers the operation panel 60 and the keyboard 61, and the open position (shown position) that is accommodated in the piano body 55 and that opens the operation panel 60 and the keyboard 61. To slide. Further, a music stand 62 is rotatably attached to the upper surface of the upper roof 57, and is used in a state where it is raised as shown in the figure at the time of performance, and between the music receiver 63 provided on the front side thereof. (Not shown) leans diagonally.
[0004]
[Problems to be solved by the invention]
However, in such a conventional keyboard lid opening / closing structure, the keyboard lid 51 is simply slid in the front-rear direction and is completely accommodated in the piano body 55 in the open position. In addition, a music stand 62 must be provided separately from the keyboard lid 51. For this reason, the number of parts increases, which leads to an increase in cost, and when starting to play, the keyboard lid 51 must be opened and then the music stand 62 must be raised. There is a drawback. In order to eliminate these disadvantages, it is possible to change the keyboard cover from a sliding type to a rotating type as seen on an acoustic piano, but in that case, when the keyboard cover is opened. The keyboard lid protrudes greatly from the piano body, and even when playing without using the music stand, it causes another problem such as the player's face becoming difficult to see.
[0005]
The present invention has been made to solve such problems, and the keyboard cover can be used as a music stand, thereby reducing costs and improving operability by reducing the number of parts. An object of the present invention is to provide a keyboard lid opening / closing structure for a keyboard instrument that can accommodate a keyboard lid in a compact manner when a music stand is not required.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the keyboard lid opening / closing structure of the keyboard instrument of the present invention accommodates the keyboard between the front parts, and the left and right arms respectively formed with guide grooves extending in the front-rear direction on the inner rear part, and the left and right arms The upper roof is placed so that the rear end of the arm is covered and the front end is located behind the front edge of the guide groove, and projects from the rear end to both sides and slides to the left and right arm guide guides. It has left and right guide protrusions that engage freely and pivotably, and these guide protrusions are guided along the guide grooves so that they are accommodated under the upper roof and open the keyboard. Projected from the lower side of the upper roof and slidable in the front-rear direction between the closed position covering the keyboard, and contacted with the front edge of the upper roof when rotated upward about the guide protrusion, Leaning backward Is characterized in that it comprises a fallboard to be stood by energizing, the.
[0007]
According to the opening / closing structure of the keyboard lid of this keyboard instrument, the keyboard lid has a guide projection that protrudes laterally from the rear end portion thereof, and is guided along a guide groove formed on the inner surface of the arm tree, thereby It slides between closed positions and is opened and closed. The keyboard lid is compactly accommodated under the upper roof in the open position to open the keyboard, and projects from the lower side of the upper roof in the closed position to cover the keyboard.
[0008]
Further, in this opening / closing structure, the keyboard lid is rotated around the guide protrusion without interfering with the upper roof because the front end of the upper roof is located behind the front edge of the guide groove. It is possible, and when it is turned upward, it abuts against the front end of the upper roof and leans up in a slanting posture. A musical score can be set up on the keyboard lid in this state and used as a musical score stand (hereinafter, this position is referred to as “musical stand use position”). As a result, since a separate music stand is not required, the cost can be reduced by reducing the number of parts. Moreover, since the opening / closing and setting of the music stand can be performed only by operating the keyboard lid, the operability is improved as compared with the prior art.
[0009]
As described above, in this keyboard lid opening / closing structure, the keyboard lid can take a total of three positions, that is, a closed position, an open position, and a music stand use position. When performing using a musical score, move to the music stand use position, and when performing without using a musical score, move to the open position to store the keyboard cover compactly. The position can be properly used according to the situation.
[0010]
In this case, the keyboard lid has guide abutting portions on both sides of the front portion, and the guide step portion with the upper side opened that guides the left and right arms while the guide abutting portion is placed when the keyboard lid slides. Preferably it is formed.
[0011]
According to this configuration, when the keyboard lid is slid, the keyboard lid can be slid more smoothly by being guided in a state where the front guide contact portion is placed on the guide step portion of the arm. Moreover, since this guide step part is open on the upper side, it does not hinder the rotation of the keyboard lid.
[0012]
In this case, the closed position of the keyboard lid is defined by the guide protrusions coming into contact with the front edge of the guide groove, and the keyboard lid is preferably rotatable upward from the closed position.
[0013]
In this configuration, the keyboard cover can be slid to the open position by simply pushing it forward from its closed position, while the music stand is used by rotating it upward while pulling slightly toward the front in the closed position. Can be moved to. In this way, the keyboard cover can be selectively moved to the open position or the music stand use position only by changing the operation from the closed position, and the operability can be improved.
[0014]
In these cases, it is preferable that an operation panel is disposed below the front end of the upper roof, and a musical score holder is provided on the operation panel.
[0015]
In this configuration, the musical score can be stood between the keyboard lid and the musical score holder only by moving the keyboard lid to the music stand use position, and the operability can be further improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an electronic piano incorporating a keyboard lid opening / closing structure according to an embodiment of the present invention. As shown in these drawings, the electronic piano 1 includes a case-like piano body 2, a plurality of keyboards 3, an operation panel 4 and a sound generation control device (not shown) housed therein, and a piano body 2. And a keyboard lid 5 for opening and closing.
[0017]
The piano body 2 is formed into a horizontally shallow shallow box by assembling the wooden shelf 6, left and right arms 7 and 7 (only the left shelf is shown), the upper roof 8, the back plate 9 and the mouth bar 10. Has been. The upper roof 8 is formed of a flat plate, covers the rear half of the piano body 2, and has a front end that is a slanting contact surface 8 a, between the front end and the mouth stick 10. Is opened and closed by the keyboard lid 5.
[0018]
The keyboard 3 includes a plurality of resin white keys 3a and black keys 3b (only one is shown). Each keyboard 3 has a rear end portion rotatably supported by a bearing member 12 screwed to the keyboard chassis 11 and is always urged by a coil spring 13 in a return direction. The keyboard chassis 11 is composed of a bent steel plate or the like, and is screwed to the shelf plate 6. A hook-like stopper portion 14 is formed at the front end portion of the keyboard 3 (only the white key 3a is shown), while the white key 3a and the black key are provided on the lower and upper surfaces of the front end portion of the keyboard chassis 11. Upper limit stoppers 15a and 15b for 3b and lower limit stoppers 16a and 16b are provided, respectively. With this configuration, the white key 3a and the black key 3b have a key release position (a position shown in the figure) where the stopper portion 14 comes into contact with the upper limit stoppers 15a and 15b, and a limit key pressing position where the lower surface of the keyboard comes into contact with the lower limit stoppers 16a and 16b. It can be rotated within the range of (not shown).
[0019]
A keyboard switch 17 for detecting the depressed state is provided for each keyboard 3 below the keyboard 3. The keyboard switch 17 includes a printed circuit board 18 and a switch main body 19 and is attached to the keyboard chassis 11. When the key is pressed, the switch main body 19 is pressed by the actuator unit 20 of the keyboard 3, thereby pressing the keyboard 3. Detects the presence or absence of key and the key press speed And according to this detection result, the sound generation of the electronic piano 1 is controlled by the sound generation control device.
[0020]
The operation panel 4 is made of metal such as aluminum and extends in the left-right direction to the full width of the piano body 2 so as to cover the rear part of the keyboard 3, and both ends thereof are screwed to the arm 7. Further, a music score holder 21 made of aluminum or resin is attached to the front end portion of the upper surface of the operation panel 4 at the center in the left-right direction. Various control switches (not shown) are provided for selecting the tone color and sound effect.
[0021]
As shown in FIG. 4, the keyboard lid 5 includes a rectangular flat plate-shaped lid main body 22, and a front frame body 23 and a rear frame body 24 that are respectively inserted into and attached to the front and rear ends thereof. . The lid body 22 is made of a resin such as acrylic. The front frame body 23 is made of, for example, vinyl chloride, and includes a handle portion 23a and a contact portion 23b (guide contact portion) that contacts the mouth bar 10 when the keyboard cover 5 is closed. Further, the rear frame 24 is made of, for example, an extruded material of aluminum, and a shaft 25 is attached to the rear end of the rear frame 24 in the left-right direction. The both ends of the shaft 25 are as shown in FIG. The left and right guide projections 26 (only one of them is shown) project outward from the rear frame body 24.
[0022]
On the other hand, in the rear part of the inner surface of the left and right arms 7, there is a guide groove between the position between the upper roof 8 and the operation panel 4 and slightly in front of the front end of the upper roof 8 and the position near the back plate 9. 27 is formed to extend in the front-rear direction. The guide groove 27 has a front portion that is substantially horizontal, a center portion that is inclined obliquely backward and downward, and a rear portion that is substantially horizontal. A guide step portion 28 extends in the front-rear direction between the vicinity of the mouth bar 10 and the lower side of the front end portion of the guide groove 27 at the front part of the inner surface of the left and right arms 7, that is, the front side of the guide groove 27. It is formed as follows. The front end portion of the guide step portion 28 extends upward from the mouth bar 10, and the subsequent portion located above the keyboard 3 is gently inclined obliquely upward and rearward, and is further located above the operation panel 4 that follows. The portion is gently inclined obliquely backward and downward, and the rear end portion is a stepped stopper portion 28a.
[0023]
The left and right guide projections 26 of the keyboard lid 5 are slidably and rotatably engaged with the guide grooves 27 of the left and right arms 7 as described above, and the keyboard lid 5 is placed on the guide step portion 28. A contact portion 23b of the front frame plate 23 is placed. With the above configuration, the keyboard lid 5 is slidable in the front-rear direction when the guide protrusion 26 is guided by the guide groove 27 in a state where the contact portion 23 b is placed on the guide step portion 28.
[0024]
As shown in FIG. 2, the forward sliding of the keyboard lid 5 is restricted by the guide projection 26 coming into contact with the front edge of the guide groove 27 and the contact portion 23 b being placed on the mouth bar 10. This position is a closed position of the keyboard lid 5, and the keyboard lid 5 closes the keyboard 3 and the operation panel 4. On the other hand, as shown in FIG. 3, when the keyboard cover 5 slides backward, the guide protrusion 26 comes into contact with the rear edge of the guide groove 27, and the contact portion 23 b reaches the stopper portion 28 a of the guide step portion 28. Is regulated by. This position is an opening position of the keyboard cover 5, and the keyboard cover 5 is accommodated below the upper roof 8 and opens the keyboard 3 and the operation panel 4.
[0025]
Moreover, the keyboard cover 5 can be rotated between the closed position of FIG. 2 and the music stand use position shown in FIG. This rotation is achieved by the fact that the front end of the guide groove 27 is located in front of the front end of the upper roof 8 and that the upper side of the guide step portion 28 is opened, so that the keyboard cover 5 is moved to the upper roof 8 or the like. It can be performed smoothly without interference. As shown in FIG. 1, the upward rotation of the keyboard lid 5 is restricted by the frame body 24 thereafter coming into contact with a contact surface 8 a formed obliquely at the front end of the upper roof 8. In this music stand use position, the keyboard lid 5 is leaned against the upper roof 8 in a slanting rearward posture, and the music score S is set between the music stand 21 formed on the operation panel 4 and used as a music stand. be able to.
[0026]
As described above, in the keyboard lid opening / closing structure of the present embodiment, the keyboard lid 5 is moved to a closed position, an opened position, and a music stand use position by sliding or rotating the keyboard lid 5 in a total of three positions. It can be moved selectively to one. For example, when not playing, the keyboard 3 or the like is closed and the keyboard 3 or the like is closed. When performing a performance using the score S, the keyboard 3 or the like is opened and the keyboard lid 5 is opened. Is used as a music stand, and when performing without using the music score S, it is moved to an open position to open the keyboard 3 and the like, and the keyboard lid 5 is accommodated compactly. The position can be properly used according to the situation. Therefore, a music stand separate from the keyboard lid 5 is not required, and thus the cost can be reduced by reducing the number of parts.
[0027]
Further, the keyboard cover 5 can be slid to the open position by simply pushing it forward from the closed position, while it is moved to the music stand use position by rotating upward while pulling slightly toward the front in the closed position. Can be moved. In this way, the keyboard cover 5 can be selectively moved to the open position or the music stand use position by only operating the keyboard cover 5 and changing the operation from the closed position, thereby improving the operability. Can do.
[0028]
In the embodiment, the guide mechanism of the rear part of the keyboard lid 5 is constituted by the guide projection 26 and the guide groove 27 of the arm 7. However, as seen in the prior art, a pinion and a rack may be used together. Is possible. The embodiment is an example in which the present invention is applied to an electronic piano. However, the present invention can be applied to other types of electronic keyboard instruments, and keyboard instruments other than electronic keyboard instruments, such as organs. it can. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.
[0029]
【The invention's effect】
As described in detail above, the keyboard lid opening / closing structure of the keyboard instrument of the present invention can also use the keyboard lid as a music stand, thereby reducing costs and improving operability by reducing the number of parts. When the music stand is not necessary, the keyboard cover can be accommodated in a compact manner.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an electronic piano to which the present invention is applied in a state where a keyboard cover is in a music stand use position.
2 is a side sectional view of the electronic piano of FIG. 1 with a keyboard lid in a closed position.
3 is a side sectional view of the electronic piano of FIG. 1 with a keyboard lid in an open position.
FIG. 4 is a partial plan view of a keyboard lid.
FIG. 5 is a side sectional view showing a conventional keyboard lid opening / closing structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electronic piano 3 Keyboard 4 Operation panel 5 Keyboard cover 7 Arm 8 Upper roof 8a Contact surface 21 Musical score holder 23b Contact part 26 Guide protrusion 27 Guide groove 28 Guide step part

Claims (4)

The left and right arms that house the keyboard between the front parts and that each have a guide groove extending in the front-rear direction on the inner rear part,
Covering between the rear parts of these left and right arms, and an upper roof arranged so that the front end is located behind the front edge of the guide groove,
Left and right guide projections projecting outward from the rear end and slidably and rotatably engage with the guide grooves of the left and right arms respectively, and these guide projections guide along the guide grooves. Thus, it is slidable in the front-rear direction between an open position that is accommodated under the upper roof and that opens the keyboard, and a closed position that projects from the lower side of the upper roof and covers the keyboard. And a keyboard cover that abuts against the front end of the upper roof when leaning upward about the guide projection and leans obliquely backward,
A keyboard lid opening / closing structure of a keyboard instrument characterized by comprising: The keyboard lid has guide abutting portions on both sides of the front portion, and guides in the state where the guide abutting portion is placed on the left and right arms when the keyboard lid is slid, and the guide step portion is opened on the upper side. The keyboard lid opening / closing structure of the keyboard instrument according to claim 1, wherein: The closed position of the keyboard lid is defined by the guide protrusion coming into contact with a front edge of the guide groove, and the keyboard lid is pivotable backward from the closed position. Item 3. A keyboard lid opening / closing structure of the keyboard musical instrument according to item 1 or 2. 4. A keyboard lid opening / closing structure of a keyboard instrument according to claim 1, wherein an operation panel is disposed below a front end of the upper roof, and a musical score support is provided on the operation panel. .

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