JP2001356771A - Exterior structure of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exterior structure of an electronic musical instrument which is capable of fixing and holding a music rack at a desired angle by simple control without complicating constitution and can make the number of parts less and the musical instrument compact while assuring the function of a speaker box. SOLUTION: The speaker box 20 is disposed on a top surface 10a of a main body and a music rack 30 is freely turnably supported by means of hinges 38 at its front 20a. A stay 50 is supported freely turnably around a turning shaft 51 and is held energized upward at all times by a coil spring 52. The rear surface of a music board 32 is provided with a guide part 33. One loop is formed by communication of a first groove 33a and a second groove 33b and a pin 53 of the stay 50 is fitted into this loop. When the music rack 30 is turned, the pin 53 is guided by the first groove 33a, by which the pin is slid and moved. When the turning of the music rack 30 is stopped, the pin 53 fits to the nearest detaining part 37 and the music rack 30 is held at the desired angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior structure of an electronic musical instrument having a music stand.

[0002]

2. Description of the Related Art A music stand mounting structure in which the angle of a music stand can be changed in an exterior structure of a musical instrument has been known. For example, there is a music stand in which a music stand is rotatably provided on a front surface of an upper front plate of a piano body, and the inclination of the music stand is held at a predetermined angle by engagement of a pin and a locking portion. In this mounting structure for a music stand, the pin is provided at the tip of a support rod rotatably provided on the music stand side, and the locking portion is formed on a receiving member provided on the upper front plate side of the piano body. The music stand is rotated to an appropriate position to engage the pin with the locking portion.

[0003]

However, in the above-described conventional music stand mounting structure, it is necessary to form a main part of a mechanism for holding the music stand at an appropriate angle on the upper front plate side of the piano body. It is not easy to manufacture. In addition, if the user is not accustomed to the operation of rotating the music stand, it may be difficult to accurately engage the pin and the locking portion. Accuracy is required. Therefore, there is a problem that the configuration is complicated.

On the other hand, electronic musical instruments may be provided with a relatively large speaker box for improving acoustic characteristics. Although there may be various positions for disposing the speaker boxes, securing a space or the like becomes a problem in a large-sized speaker box. In general, there is a space below the keyboard, and a speaker box may be arranged here. However, when doing so, not only does the sound “muffled” occur for the player, but the knees are more likely to hit the speaker box, so the entire housing needs to be raised. If the whole case is made high, it becomes difficult to play the music, and as a result, the speaker box cannot be made very large. On the other hand, for example, it is conceivable to provide a speaker box above the rear part of the keyboard. However, since a music stand is usually arranged above the rear part of the keyboard, it is not possible to make a very large space for the speaker box. Therefore, there is room for improvement in the arrangement of the music stand and the speaker box.

The present invention has been made to solve the above-mentioned problems of the prior art, and a first object of the present invention is to fix a music stand at a desired angle by a simple operation without complicating the configuration. An object of the present invention is to provide an external structure of an electronic musical instrument that can be held. A second object is to provide an exterior structure of an electronic musical instrument that can reduce the number of components and make the musical instrument compact while securing the functions of a music stand and a speaker box.

[0006]

According to a first aspect of the present invention, there is provided an exterior structure of an electronic musical instrument, comprising: a fixed base fixedly connected to a main body of the electronic musical instrument; A music stand rotatably mounted and configured to be able to change the angle, a stay rotatably mounted on the fixed base,
A guide portion provided on the back surface of the music stand and having a loop formed by a first groove having a locking portion and a second groove for return, wherein the guide portion has a rotation end portion of the stay; The stay is rotated with the rotation of the music stand, and the rotating end of the stay is guided by the guide portion so as to be slidable in the loop. By stopping the rotation of the music stand when the moving end is in the first groove in the loop, the rotating end of the stay is locked by the locking portion of the first groove, and The music stand is configured to be held at a predetermined angle position.

With this configuration, the stay rotates with the rotation of the music stand, and the rotating end of the stay is guided by the guide portion and slides in the loop. Since the guide portion has a loop formed by the first groove having the locking portion and the second groove for return, the turning end of the stay is in the first position during the forward movement of the music stand. The groove slides and moves, and during the return stroke of the music stand, the second groove slides and returns. Then, when the turning end of the stay is in the first groove in the loop, the turning of the music stand is stopped, so that the turning end of the stay is engaged with the locking portion of the first groove. The music stand is stopped and held at a predetermined angular position. Since the guide portion is formed with a loop by the first groove having the locking portion and the second groove for returning, the music stand is fixed at a desired position by a simple operation of rotating the music stand to an appropriate position. Can be held. Also, since the guide part is provided on the back of the music stand,
There is no need to perform complicated processing on the fixed base side of the speaker box or the like, and manufacturing is easy. Therefore, the music stand can be fixedly held at a desired angle by a simple operation without complicating the configuration.

According to a second aspect of the present invention, there is provided an electronic musical instrument exterior structure having a keyboard in a main body of the electronic musical instrument having legs such as side plates. , A speaker box having a width equal to substantially the entire width of the electronic musical instrument main body is disposed behind the keyboard and above the electronic musical instrument main body, and a music stand configured to be able to change the angle is provided in the speaker box. It is characterized by the following.

[0009] With this configuration, the music stand is configured so that the angle can be changed, so that the music stand can be used at a desired angle according to the height and the use scene. In addition, since the speaker box is arranged behind the keyboard and above the electronic musical instrument main body, the space above the rear part of the keyboard (above the roof plate) is effectively used,
A speaker box having a large internal volume can be provided, and good acoustic characteristics can be obtained. Further, since the music stand is provided in the speaker box, a space for disposing the music stand is also secured. Therefore, while ensuring the functions of the music stand and the speaker box, the number of parts can be reduced and the size of the musical instrument can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the configuration of an exterior structure of an electronic musical instrument according to an embodiment of the present invention.

The electronic musical instrument body 10 includes legs 101 such as side plates.
And a musical instrument housing 102 provided above the legs 101 and having a keyboard 11 and a sound source (not shown). On the upper surface 10a of the electronic musical instrument main body 10 behind the keyboard 11, a speaker box 20 (fixed base) is provided. A music stand 3 is provided on the front surface 20a of the speaker box 20.
0 is attached.

FIG. 2 is a plan view showing the speaker box 20 as viewed obliquely from above (arrow A) in FIG. However, in the same figure, a guide portion 33 (3
3L, 33R) to the pin 5 of the stay 50 of the music stand holder M.
3 shows a state where 3 is not fitted, and a hinge 38 described later is not fixed to the music stand 30 (a state that is impossible when assembled and used). The music stand 30 is shown at an angular position during normal use (standing state).

Side plates 63 are fixed to the left and right sides of the speaker box 20. The speaker box 20 includes a side plate 63 and is formed to have a length substantially covering the entire width of the electronic musical instrument main body 10, and as shown in FIG. 1, a depth extending from near the rear of the keyboard 11 to the rear of the electronic musical instrument main body 10. It is configured. Therefore, the space above the upper surface 10a of the electronic musical instrument main body 10 is maximally utilized, and the size of the speaker box 20, particularly the internal volume, can be increased, contributing to good acoustic characteristics.

The speaker box 20 includes a speaker 2
1, 22, a stop hole 23 for attaching a saran net 39, a port hole 24, an upper stud 61, a lower stud 62, a hinge 38 for attaching a music stand 30, and the like.
The speaker box 20 is further provided with a music stand holder M, and by attaching the music stand 30 to the music stand holder M, the music stand 30 can be rotated and fixedly held as described later. . The music stand 30 is arranged at a position that does not cover the speaker 21 at substantially the center in the width direction of the speaker box 20. Thereby, the muffled sound is prevented in the speaker box 20, and the good function of the speaker box 20 is maintained.

The speaker box 20 has a lower rear end (FIG. 1).
(Indicated by an arrow B shown in FIG. 3), is fixed to the rear of the upper surface 10a of the electronic musical instrument main body 10 by two hinges (not shown). A notch is provided on the inner side surface of the both side plates 63 on the player side, and L-shaped fittings 64 are attached to the both side plates 63 in the notches. The metal fitting 64 is screwed from above, and the upper surface 10a of the electronic musical instrument main body 10 is fixed.
(Accurately, the speaker box 20 is fixed to the electronic musical instrument main body 10 by fixing the speaker box 20 to the electronic musical instrument main body 10.) Because it can be fixed with screws from above, assembly and removal work is easy to do,
Further, when the fixing by the metal fitting 64 is released, the speaker box 20 can be rotated rearward by the hinge, so that maintenance or the like is easy to perform. Also, if the Saran net 39 is covered, the metal fittings 64 become invisible, so that the appearance is good.

FIG. 3 is a partially enlarged view of the music stand holder M. FIG. 4 shows the music stand 30 and the speaker box 2.
It is a fragmentary sectional view near the music stand holding part M containing 0. FIG.
Shows a cross section of the music stand holder M cut at the approximate center in the width direction. Hereinafter, description will be made with reference to FIGS.

As shown in FIG.
A fixing member 55 is fixed to the front surface 20a of the front panel 20 with a screw or the like.
0a. The fixed member 55 is provided with a rotating shaft 51, and the stay 50 is attached to the rotating shaft 51.
1 is supported so as to be rotatable. The stay 50 is also constantly urged upward (clockwise in FIG. 4) by a coil spring 52 provided near the rotation shaft 51. FIG.
Since the music stand 30 is not assembled yet,
Is in a free state, and is located at the end of rotation by the urging force of the coil spring 52. At the tip of the stay 50, cylindrical pins 53 (rotating end portions) are protrudingly provided on both left and right sides.

The music stand 30 is constructed by connecting a music tray 31 to a music plate 32. Front 2 of speaker box 20
In Oa, an upper slat 61 and a lower slat 62 are provided in an upper part and a lower slat 62, respectively, and a hinge 38 is provided in the upper slat 61. The hinge 38 has one plate piece fixed to the musical score plate 32 and the other plate piece fixed to the upper support 61 by screws.
A music stand 30 is supported rotatably about a hinge 38. The music stand 30 is at least in the upright position shown in FIG.
(a state parallel to a) and a horizontal state (a state where the music score plate 32 is parallel to the top surface 20b of the speaker box 20).

Since the hinge 38 is provided at the upper end of the speaker box 20 and in the vicinity of the front end (ie, near the top of the front end of the speaker box 20), the uppermost part of the music stand 30 in the process of rotating around the hinge 38. Does not protrude significantly upward or toward the player, and is compact. In addition, the operation is easy due to the small turning structure. That is, in the arrangement of the speaker box 20, the electronic musical instrument main body 10
The effective use of the space above the upper surface 10a and the space behind the music stand 30 makes it possible to keep the height of the speaker box 20 low while securing good acoustic characteristics. Although the height of the speaker box 30 is higher than that of the speaker box 20, the above arrangement of the hinge 38, which is the center of rotation of the music stand 30, mitigates the adverse effects.

As shown in FIG. 4, the music plate 3 of the music stand 30 is provided.
A guide portion 33 is provided on the back surface of the second member 2. The guide portion 33 is made of a synthetic resin or the like, and two (33L, 33R) are provided substantially symmetrically to the left and right (FIG. 3). On the back surface of the music score plate 32, a mounting concave portion 36 is formed (FIGS. 3 and 4), and the guide portion 33 is fixed thereto. The guide portion 33 is positioned by the bottom surface 36 a of the mounting recess 36, and the interval between the musical score plate 32 and the front surface 20 a of the speaker box 20 can be reduced by providing the mounting recess 36.

The guide portion 33 has a rib-like partition 34 extending in the longitudinal direction and a check member 3 connected thereto.
5 (retrograde stop member) is provided.
A first groove 33a is formed on the side of the musical score plate 32, and a straight second groove 33b for returning is formed on the opposite side of the musical score plate 32. A plurality of locking portions 37 are formed on the side of the musical score plate 32 in the first groove 33a.

The check member 35 extends from the partition 34 toward the upper end of the musical score plate 32 and has elasticity.
While the tip of the check member 35 is prevented from bending in the direction of the musical score plate 32, it can bend in the direction opposite to the musical score plate 32. First
The groove 33a and the second groove 33b communicate with each other to form one loop.

When the music stand 30 is assembled to the music stand holding portion M, as shown in FIG.
The pin 53 at the tip of the stay 50 is fitted into the groove 33b. The pin 53 is sized to be slidable in the grooves 33a and 33b. The locking portion 37 is formed in a size that allows the pin 53 to be disengaged.

The operation of adjusting the music stand 30 to a desired angle in such a configuration will be described.

First, the music stand 30 is raised (the music board 32).
Is parallel to the front surface 20 a of the speaker box 20), the pins 53 of the stay 50 are
3a, the coil spring 52
Is appropriately pressed in the direction of the musical score plate 32. When the music stand 30 is rotated clockwise in FIG. 4, the pins 53 are guided by the first grooves 33 a and slide toward the upper end of the music plate 32. When the music stand 30 stops rotating at an appropriate angle and is released, the music stand 30 turns slightly counterclockwise due to its own weight.
Since 3 is always urged toward the musical score plate 32, it is fitted and locked to the nearest engaging portion 37 (closer to the musical score receiver 31 than the pin 53). Thereby, the music stand 30 is held at a desired angle. At this time, the hinge 38, the rotating shaft 5
The music stand 30 is defined and supported at a predetermined angle by the three points 1 and the pin 53.

During the forward movement of the music stand 30, the pin 53 is moved from the entrance 37a of the locking portion 37 to the next locking portion 37.
When moving to the entrance 37a, the pin 53 jumps due to the urging action of the coil spring 52 and makes a "click" sound. If the player returns the music stand 30 to the signal as a signal,
It can be easily adjusted to the desired angle. It is almost possible to know at which position the music stand 30 is held without looking at the back of the music stand 30. Further, if the user does not like the set angle, the music stand 30 may be further rotated clockwise, so that usability is improved. Good.

When the music stand 30 is further rotated clockwise, the pin 53 is disengaged from the locking portion 37, and the music stand 30 is in a horizontal state (the music plate 32 is on the top surface 20b of the speaker box 20).
(In a state parallel to the above), the pin 53 deflects the check member 35 and moves from the first groove 33a to the second groove 33b.
Then, when the music stand 30 is rotated counterclockwise,
The pin 53 is guided by the second groove 33b and is
Then, the music stand 30 returns to the original standing state.

Thus, the first and second loops are formed.
Grooves 33a, 33b, locking portion 37, and coil spring 52
, The fixed angle of the music stand 30 can be adjusted by a simple operation in an almost automatic manner.

According to the present embodiment, the music stand 30 is rotatably supported by the hinge 38, and a loop is formed by the first groove 33a having the locking portion 37 and the second return groove 33b. The pins 53 of the stay 50 are formed by the formed guide portions 33.
And the pin 53 is locked by the locking portion 37 at the desired position, so that the music stand 30 can be fixedly held at the desired position by a simple operation of rotating the music stand 30 to an appropriate position. . Further, since the guide portion 33 is provided on the back surface of the music score plate 32, the fixing member 5 is provided on the speaker box 20 side.
5, the stay 50, the coil spring 52, etc.
There is no need for complicated processing, and manufacturing is easy. Therefore, the music stand can be fixedly held at a desired angle by a simple operation without complicating the configuration.

Further, since the speaker box 20 is disposed behind the keyboard and above the electronic musical instrument main body 10, the space above the rear part of the keyboard (above the roof plate) is effectively used,
A speaker box having a large internal volume can be provided, and good acoustic characteristics can be easily obtained. Music stand 3
0 is attached to the speaker box 20, so the music stand 3
There is no hindrance to the 0 arrangement space. Furthermore, the music stand 30
The hinge 38 which is the center of rotation of the speaker box 20 is disposed near the top of the front end of the speaker box 20, so that the music stand 30 is prevented from protruding greatly upward or to the player side at any angle, thereby increasing the size of the musical instrument or hindering the performance. Is avoided. Therefore, while ensuring the functions of the music stand and the speaker box, the number of parts can be reduced and the size of the musical instrument can be reduced.

Further, since the music stand 30 can be freely changed in angle, it can be used by adults and children, and can be used at a desired angle according to the height. In addition, when practicing ensemble and chorus using a keyboard instrument such as this electronic musical instrument as a master (instructor), when the instructor practices accompaniment with each hand or conducts each part and conducts with the other hand There is. In such a case, it is difficult for a player other than the keyboard instrument to see the signal of the instructor, and the instructor may stand and play the keyboard. That is, there are cases where repetition of standing performance or sitting performance is frequently performed. Even in such a case, the angle of the music stand 30 can be changed by a simple operation, so that the angle can be easily adjusted to an easy-to-see angle, which is useful.

The music stand 30 is configured to be rotatable to a horizontal state. However, the present invention is not limited to this. Considering the position of the projecting portion of the music stand 30 such as the music receiver 31, the minimum angle is required. May be set to the rotation end. When the music stand 30 is in a horizontal state, the surface of the music stand 30 can be used as a simple desk. At that time, the strength of the stay 50 needs to be set high. This is convenient when performing while standing or when writing articulations for musical performances for production.

The left and right guide portions 33L and 33R may be formed integrally with resin. In that case, an entrance is required when the pin 53 is first assembled to the guide portion 33. At the entrance, the pin 53 of the stay 50 is
3a, it is provided at a position (a position other than the above-mentioned loop) other than a portion which is always fitted in the second groove 33b.

[0035]

As described above, according to the first aspect of the present invention,
According to the outer structure of the electronic musical instrument according to the above, the music stand can be fixedly held at a desired angle by a simple operation without complicating the configuration.

According to the outer structure of the electronic musical instrument according to the second aspect, the functions of the music stand and the speaker box are ensured while maintaining the functions.
The number of parts can be reduced, and the size of the instrument can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of an exterior structure of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a plan view showing the speaker box as viewed from diagonally upper left (arrow A) of FIG. 1;

FIG. 3 is a partially enlarged view of a music stand holder M;

FIG. 4 is a partial cross-sectional view of the vicinity of a music stand holding mechanism including a music stand and a speaker box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Electronic musical instrument main body, 10a upper surface, 20 speaker box (fixed stand), 30 music stand, 31 music receiver, 32 music board, 33 guide part, 33a first groove, 33b second groove, 35 check member, 3
6 mounting recess, 37 locking part, 38 hinge,
50 stay, 51 rotating shaft, 52 coil spring,
53 pin (rotating end), M music stand holder

Claims (2)

[Claims] A fixed stand connected to and fixed to the electronic musical instrument main body, a music stand rotatably attached to the fixed stand and configured to be capable of changing an angle, and a music stand rotatably attached to the fixed stand. A stay provided on a back surface of the music stand, a guide portion having a loop formed by a first groove having an engaging portion and a second groove for regression; The moving end is fitted, and the stay is turned with the turning of the music stand, and the turning end of the stay is guided by the guide portion so as to be slidable in the loop. By stopping the rotation of the music stand when the rotation end of the stay is in the first groove in the loop, the rotation end of the stay is locked to the locking portion of the first groove. And the music stand can be held at a predetermined angular position. The exterior structure of the electronic musical instrument to be. 2. An exterior structure of an electronic musical instrument having a keyboard in an electronic musical instrument main body having legs such as side plates, wherein the electronic musical instrument main body has a keyboard behind and above the electronic musical instrument main body. An exterior structure of an electronic musical instrument, wherein a speaker stand having an equal width is provided, and a music stand configured to change an angle is provided in the speaker box.