JPH09160559A - Speaker device of electronic keyed instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the low-pitched tone reproducing ability of an electronic keyed instrument without increasing the size of the cose of the instrument. SOLUTION: A speaker box 11 for use with an electronic keyed instrument 10 comprises an upper part 12 made from a resin and a lower part 13 similarly made from a resin, and is provided from above to below a top board 8. The lower part 13 is provided in a position between the top board 8 and a keybed 2, where it does not interfere with a fallboard 6. A speaker 16 is a full-range one, mounted while being directed upward so as to block a speaker mounting hole formed in the speaker box 11. The speaker 16 is placed with its diaphragm 16a directed to the player because a speaker mounting surface 12b is inclined forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device used in an electronic keyboard instrument such as an electronic piano.

[0002]

2. Description of the Related Art Conventionally, as a speaker device for an electronic keyboard instrument, for example, the one shown in FIG. 7 has been known. That is, in this speaker device, the speaker 56 is attached from the lower surface side of the top plate 8 to the speaker mounting hole provided in the top plate 8 of the electronic keyboard instrument, and the speaker box 51 surrounds the speaker 56 and the top box 8 is installed. And the shelf board 2.

[0003]

In such a speaker device, if the bass reproduction capability is to be improved (that is, the lower limit of the bass reproduction limit is to be widened), it is necessary to increase the capacity of the speaker box 51. It was

However, the capacity of the speaker box 51 is limited by the space between the top plate 8 and the shelf plate 2 (the space between the top plate 8 and the keyboard cover 6 when the keyboard cover 6 interferes).
In order to increase the capacity of the speaker box 51, the space between the top plate 8 and the shelf plate 2 (or the keyboard lid 6) is widened to enlarge the case itself of the electronic keyboard instrument. In this way, the top plate 8
When the space between the shelf plate 2 (or the keyboard lid 6) is widened, there is a problem that the manufacturing cost increases because the material used for the case increases correspondingly.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a speaker device for an electronic keyboard instrument capable of improving the bass reproduction capability without increasing the size of the case of the electronic keyboard instrument. And

[0006]

In order to solve the above problems, the invention according to claim 1 is a speaker device for an electronic keyboard instrument, which is a top plate which is an upper surface of a case of the electronic keyboard instrument. It is characterized by comprising a speaker box provided from above to below, and a speaker attached above the top plate of the speaker box.

The speaker box in the present invention is provided from above to below the top plate which is the upper surface of the case of the electronic keyboard instrument. Here, the lower side of the top plate is limited in capacity by the presence of the shelf plate and the keyboard lid, but the upper side of the top plate is an open space and is not limited in capacity.
For this reason, when increasing the capacity of the speaker box for the purpose of expanding the lower limit of the reproduction range of the bass of the speaker, the speaker box is configured so as to pop out from above the top plate, so that the case itself of the electronic keyboard instrument is enlarged. It is possible to increase the capacity of the speaker box without doing so.

The speaker of the present invention is mounted above the top plate of the speaker box. Considering that the top plate of an electronic keyboard instrument is usually located between the player's chest and head, the speaker mounted above the top plate is located near the player's ear. Therefore, the player can easily hear the performance sound emitted from the speaker.

According to a second aspect of the present invention, there is provided a speaker device for an electronic keyboard musical instrument according to the first aspect, wherein the speaker is
The diaphragm is attached so as to be inclined forward. According to the present invention, since the speaker is attached so that the diaphragm is inclined forward, the performer can more easily hear the performance sound emitted from the speaker, as compared with the case where the diaphragm faces directly above. . In particular, since the sound in the high frequency range has high directivity, it may not reach the performer directly if the diaphragm faces upward, but the present invention does not have such a fear.

According to a third aspect of the present invention, there is provided a speaker device for an electronic keyboard instrument according to the first or second aspect, wherein the speaker is directed outward so as to close a speaker mounting hole formed in the speaker box. It is characterized by being attached by. In the present invention, the speaker is mounted outward so as to close the speaker mounting hole formed in the speaker box, so that the sound emitted from the speaker is not muffled or reflected inside the speaker box. , The performer can hear the clear sound.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment of the present invention
It is needless to say that the present invention is not limited to the following embodiments, and can take various forms within the technical scope of the present invention. [First Embodiment] FIGS. 1A and 1B are explanatory views of an electronic keyboard instrument according to the first embodiment. FIG. 1A is a front view and FIG. 1B is a right side view.
FIG. 2 is an assembled perspective view of the speaker box of the first embodiment.

The electronic keyboard instrument 10 of the first embodiment mainly comprises a shelf 2, a keyboard 4, a keyboard lid 6, a top plate 8, a speaker box 11 and a speaker 16. The shelf plate 2 is horizontally installed between a pair of left and right vertical side plates 3 and 3, and a plurality of keyboards 4, 4, ... Are arranged on the upper surface thereof. An action load simulation member 5 is provided on the back side of the keyboard 4 (right side in FIG. 1B). The action load simulation member 5 applies a load applied to the normal keyboard by the action mechanism of the acoustic piano when the keyboard 4 is pressed. Further, a slide-type keyboard lid 6 that can be opened and closed is provided on the keyboard 4. The keyboard lid 6 is arranged between the top plate 8 and the shelf plate 2 in the open state (see FIG. 1B), and in the closed state, the keyboard lid 6 is arranged at a position to cover the upper part of the keyboard 4.

The top plate 8 is provided so as to bridge the upper surfaces of the pair of left and right vertical side plates 3, 3. This top plate 8
Through holes 9 are formed on both the left and right sides of the. This through hole 9
Is substantially the same size as the lower opening of the upper portion 12 described later. Further, the height of the top plate 8 is such that it is positioned between the chest and the head of the player when the player sits on a chair for playing and plays.

The speaker box 11 is provided from above the top plate 8 to below the top plate 8. As shown in FIG.
The speaker box 11 includes a resin upper portion 12 and a resin lower portion 13. The upper portion 12 is a box-shaped body having no bottom surface, a flange 12a is provided on the lower end, and a speaker mounting hole 12c is provided on the upper surface, that is, the speaker mounting surface 12b. The speaker mounting surface 12b is inclined forward. On the other hand, the lower portion 13 is a box-shaped body having no upper surface, and a flange 13a is provided at the upper end. The lower portion 13 is formed to be longer in the left-right direction than the upper portion 12 (that is, substantially the same as the length from the side plate 3 to the center of the electronic keyboard instrument 10). The speaker box 11 is a top plate 8
Is arranged so that the flange 12a of the upper portion 12 abuts around the through hole 9 of the top plate 8 from above, and the flange 12a is fixed to the upper surface of the top plate 8 with a screw or an adhesive. From below the flange 13a of the lower portion 13
Is formed by covering the through hole 9 of the top plate 8 and fixing the flange 13a to the lower surface of the top plate 8 with a screw or an adhesive. The lower part 13
Is provided at a position between the top plate 8 and the shelf plate 2 so as not to interfere with the keyboard lid 6 (see FIG. 1B).

The speaker 16 is a full-range speaker capable of covering all of the high sound range to the low sound range, and is mounted outward so as to close the speaker mounting hole 12c formed in the speaker box 11. The speaker 16 is a closed type speaker and has a speaker mounting surface 1
Since the 2b is inclined forward, the diaphragm 16
a is also inclined toward the front and is arranged toward the player.

The exterior members of the electronic keyboard instrument 10 such as the side plates 3 and 3 and the top plate 8 are collectively referred to as a case. Also,
The keyboard 4 is provided with various sensors (not shown), and the various sensors are wired so as to transmit a detection signal to a control device (not shown). Further, the control device is connected so as to output sounds to the speakers 16, 16 via a digital sound source (not shown).

Next, the operation of the electronic keyboard instrument 10 of the first embodiment will be described. When the performer presses the keyboard 4, the control device receives the detection signals of various sensors provided on the keyboard 4, and causes the speakers 16 and 16 to output sounds through the digital sound source based on the detection signals.

At this time, since the sound output from the speaker 16 has a large capacity of the speaker box 11, the lower limit of the reproduction limit of bass is widened, and a lower sound can be produced. That is, in comparison with the conventional case where the speaker box is provided only between the top plate 8 and the shelf plate 2, the capacity of the upper portion 12 provided above the top plate 8 is larger in the present embodiment, As a result, a lower tone can be produced.

Further, since the speaker box 11 is constructed so as to project above the top plate 8, the speaker box 1 can be constructed without enlarging the case itself of the electronic keyboard instrument 10.
Only the capacity of 1 can be increased. Further, since the speaker 16 is mounted above the top plate 8, it is arranged at a position close to the performer's ears, and the performer can easily hear the performance sound emitted from the speaker 16. Moreover, since the performance sound emitted from the speaker 16 is hardly reflected on the floor or causes phase interference,
For example, it is possible to maximize the effects of the reverberation circuit and the sound field reproducing circuit developed for two channels. In other words, in a reverberation circuit, etc., a reflected sound is electrically generated or phase interference is performed in advance to produce a surround effect, etc., but if the sound emitted from the speaker is reflected on the floor or phase interferes, it is as designed. Since the effect of will not be obtained,
It is advantageous to obtain the intended effect that such reflection does not occur.

Furthermore, since the speaker 16 is attached so that the diaphragm 16a is inclined forward, the performer can produce a performance sound emitted from the speaker 16 as compared with the case where the diaphragm 16a is directed right above. Will be easier to listen to. Moreover, since the speaker 16 is mounted outward so as to close the speaker mounting hole 12c formed in the speaker box 11, the sound emitted from the speaker 16 is muffled or reflected inside the speaker box 11. The player can hear a clear sound. [Second Embodiment] FIG. 3 is a perspective view of a speaker box according to a second embodiment. The electronic keyboard instrument of the second embodiment is different from that of the first embodiment only in the speaker box, so only the speaker box will be described.

The speaker box 21 of the second embodiment comprises a resin box 22 and a thick wooden baffle plate 23. The resin box 22 is a box-shaped body with a bottom, and the upper end is inclined forward. The wooden baffle plate 23 is provided with a speaker mounting hole 23c and covers the upper end of the resin box 22. Therefore, the wooden baffle plate 23 is inclined forward. The speaker box 21 is fitted into the through hole 9 provided in the top plate 8, is arranged at a position where the bottom surface 21a (that is, the bottom surface of the resin box 22) does not interfere with the keyboard lid 6, and the wooden baffle plate 23 is placed on the top. It is arranged above the plate 8.

The operation and effect of this second embodiment are the same as those of the first embodiment, so the description thereof will be omitted. [Other Embodiments] Speaker box 11 of the first embodiment
May be configured as shown in FIGS. 4 (a) and 4 (b). That is,
The upper portion 112 shown in FIG. 4A is obtained by making the upper portion 12 of the first embodiment substantially match the length of the lower portion 13 in the left-right direction. 4 (b) is a box-shaped body 18 that is continuous from one side plate 3 to the other side plate 3 in appearance, and a partition plate 1 that divides it into two speaker boxes 11, 11 at a substantially central portion thereof.
9 is provided. Even when the above-described configuration of FIGS. 4A and 4B is adopted, the same operational effect as that of the first embodiment can be obtained.

Also, the speaker box 11 of the first embodiment.
May be configured as shown in FIGS. That is,
In FIG. 5A, the front surface (vertical surface) of the upper part 212 is a speaker mounting surface 212b, and the speaker 16 is mounted on the speaker mounting surface 212b. In FIG. 5B, the speaker mounting surface 312b of the upper portion 312 is inclined forward as in the first embodiment, but the shape of the upper portion 312 viewed from the side is trapezoidal, which is different from the first embodiment. It is different. In FIG. 5C, the upper surface (horizontal surface) of the upper portion 412 is used as a speaker mounting surface 412b, and the diaphragm of the speaker 16 is mounted on the speaker mounting surface 412b so as to face directly above. Further, FIG. 5D shows the keyboard lid 50.
6 is opened and closed by a hinge so that the keyboard lid 506 is not arranged between the top plate 8 and the shelf plate 2 when the keyboard lid 506 is opened. In this case, the lower portion 513 of the speaker box 11 can be expanded from the top plate 8 to just above the shelf plate 2, and the capacity is increased as compared with the first embodiment.

5 (a) to 5 (d), the bass reproduction capability can be improved without increasing the size of the case of the electronic keyboard instrument. Further, although the full-range speaker is provided as the speaker 16 in the first embodiment, a two-way speaker may be used by combining a full-range speaker with a tweeter for a high frequency range, or a three-way speaker. Alternatively, as shown in FIG. 6, a speaker box 31 is separately provided in the lower space of the shelf board 2, a speaker 36 for a large-diameter ultra-low range is attached to a speaker mounting hole of the speaker box 31, and a front surface is covered with a saran net 37. May be.

Further, although the closed type speaker device is taken up in the first embodiment, the bass reflex type may be provided by providing the baffle plate with a sound emission hole different from the speaker mounting hole.
In this case, the sound from the back side of the speaker diaphragm comes out from the sound emitting hole, but the sound coming from this sound emitting hole should be in phase with the sound from the front side of the speaker diaphragm. By designing, the lower limit of the bass reproduction limit can be further widened.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an electronic keyboard musical instrument according to a first embodiment,
(A) is a front view and (b) is a right side view.

FIG. 2 is an assembled perspective view of the speaker box of the first embodiment.

FIG. 3 is a perspective view of a speaker box of a second embodiment.

FIG. 4 is an explanatory diagram of a modified example of the first embodiment.

FIG. 5 is an explanatory diagram of a modified example of the first embodiment.

FIG. 6 is an explanatory diagram of a modified example of the first embodiment.

FIG. 7 is an explanatory diagram of a conventional electronic keyboard instrument.

[Explanation of symbols]

2 ... Shelf plate, 3 ... Side plate, 4 ...
..Keyboards, 6 ... Keyboard lids, 8 ...
・ Top plate, 9 ... through hole, 10 ...
Electronic keyboard instrument, 11 ... Speaker box,
12 ... upper part, 13 ... lower part,
16 ... speaker, 16a ... diaphragm,

Claims (3)

[Claims] 1. A speaker box provided from above to below a top plate which is an upper surface of a case of an electronic keyboard instrument, and a speaker mounted above the top plate of the speaker box. A speaker device for a characteristic electronic keyboard instrument. 2. The speaker device for an electronic keyboard instrument according to claim 1, wherein the speaker is attached such that a diaphragm is inclined forward. 3. The speaker device for an electronic keyboard instrument according to claim 1, wherein the speaker is mounted outward so as to close a speaker mounting hole formed in the speaker box.