JPH0854880A - Speaker system of electronic musical instrument - Google Patents

Abstract

PURPOSE:To obtain a speaker system of an electronic musical instrument with which a rich bass feeling is obtainable by providing the speaker system with a bottom plate and a speaker for bass which are respectively specific. CONSTITUTION:A lower casing 11 is composed of side pates 17 which constitute a part of the front, rear, right and left side plates of the electronic musical instrument and a bottom plate 16 disposed in the position of the prescribed distance from a base 20 as placing surface. The bottom plate 16 is provided with a mounting hole 18 for the speaker 15 for bass approximately at its center and the speaker 15 is mounted therein by directing its opening surface toward a lower side. A hermetic space 19 is formed by the bottom plate 16, the side plates 17 and the base 20 when the speaker system is placed on the base 20, such as desk, of the electronic musical instrument. The speaker 15 radiates the sound including the bass components toward the space 19. The space 19 is a capacity of an enclosure of the hermetic type speaker system by the bottom plate 16 as function of the baffle plate, in such case. As a result, the suspension formed by the air of the space 19 is softened and the vibrations generated by the speaker 15 are transmitted to the base 20, by which the base is resonated and the bass is stressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker system for an electronic musical instrument that provides a low-pitched sound.

[0002]

2. Description of the Related Art Conventionally, an electronic musical instrument having a speaker system such as a keyboard has been developed and put into practical use. When developing such an electronic musical instrument, there are problems such as how to prevent missing of the sound emitted from the speaker and how to provide a low-pitched sound. This is due to the compact design of the housing of the electronic musical instrument.

A speaker system in a conventional electronic musical instrument is constructed, for example, as shown in FIG. FIG. 4 is a view of the cut surface of the housing of the electronic musical instrument as seen from the back side. One speaker is provided on each of the left and right sides of the housing, 14A is a left channel speaker, and 14B is a right channel speaker. As the left channel speaker 14A and the right channel speaker 14B, a full range speaker is usually used.

By the way, in the conventional electronic musical instrument, in order to give a low-pitched sound, a speaker having a relatively large diameter is used as a rear open type speaker system as shown in FIG. 4 (A). However, in order to obtain a sufficient low-pitched sound, the diameter of the speaker is inevitably large, and thus the size of the housing is inevitable, and there is a limit in realizing it as a product.

Further, in order to solve such a problem, in recent years, as shown in FIG. 4B, for example, a so-called closed type speaker system using an enclosure in which a back surface of a small speaker is closed is used to produce a bass sound. I have a feeling. When using this closed type speaker system, if the volume of the enclosure is small, the suspension formed by the closed air becomes hard and the bass characteristic deteriorates. Must be secured. However, since it is necessary to make an electronic musical instrument such as a keyboard compact, it is difficult to secure a sufficient capacity of the enclosure, and it is not possible to obtain a sufficient bass feeling.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a speaker system for an electronic musical instrument capable of providing a rich bass feeling.

[0007]

In order to achieve the above object, the invention according to claim 1 is a position separated from the mounting surface by a predetermined distance so as to form an enclosed space by the mounting surface and the side plate. And a bass speaker attached to a hole formed at a predetermined position of the bottom plate with its opening surface facing the closed space.

For the same purpose, the invention according to claim 2 has a bottom plate provided at a position separated from the mounting surface by a predetermined distance so as to form an enclosed space by the mounting surface and the side plate, And a bass speaker attached to a hole formed at a predetermined position of the bottom plate with its opening surface facing the outside of the closed space.

[0009]

In the speaker system of the electronic musical instrument according to the first aspect of the invention, when the electronic musical instrument is placed on a flat surface, for example, a closed space is formed by the placing surface, the side plate and the bottom plate. ing. The bass speaker is arranged with its opening surface facing the closed space.

Therefore, when the electronic musical instrument is placed on a flat table such as a desk, the bottom plate functions as a baffle plate, and the closed space serves as an enclosure capacity in the closed speaker system. As a result, the suspension formed by the air in the enclosed space becomes soft, the vibration generated by the bass speaker is transmitted to the table on which the electronic musical instrument is mounted, and the table resonates to emphasize the bass. Sound is generated. With this configuration, a rich bass can be produced, and since the closed space is formed by using the bottom plate, a new plate for creating the closed space is not required, and the speaker system There is also an effect that the cost can be reduced.

In the speaker system for an electronic musical instrument according to a second aspect of the invention, when the electronic musical instrument is placed on a flat surface, for example, a closed space is formed by the placing surface, the side plate and the bottom plate. ing. The bass speaker is arranged in the closed space with its opening surface facing outward from the closed space.

Therefore, when the electronic musical instrument is placed on a flat table such as a desk, the bottom plate functions as a baffle plate and the closed space serves as an enclosure capacity in the closed speaker system. As a result, similarly to the conventional closed-type speaker system, the suspension formed by the air in the closed space becomes soft, so that the influence of the sound component radiated from the back surface of the bass speaker on the bass speaker can be eliminated. it can. With this configuration, it is possible to produce a rich bass feeling, and
Since the closed space is formed by using the bottom plate, there is also an effect that a new plate for forming the closed space is not needed and the speaker system can be inexpensive.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a speaker system for an electronic musical instrument of the present invention will be described in detail below with reference to the drawings.
It should be noted that the same or corresponding portions will be denoted by the same reference numerals for description.

(1) First Embodiment FIG. 1 is a perspective view showing the configuration of a first embodiment of a speaker system for an electronic musical instrument according to the present invention. The housing of the electronic musical instrument is configured so that it can be separated into an upper housing 10 and a lower housing 11, and these are fitted together to form a housing of the electronic musical instrument. As the housing, for example, width 1
The size may be about 000 (mm) x depth 300 (mm) x height 100 (mm).

The upper housing 10 is provided with a keyboard 12, an operation panel 13, a left channel speaker 14A, a right channel speaker 14B, and a board (not shown) on which other electronic circuits are mounted. As the left channel speaker 14A and the right channel speaker 14B, for example, full range speakers can be used as in the conventional case. The lower housing 11 includes a bottom plate 16 and side plates 1.
7, and the bass speaker 15 is attached to the bottom plate 16.
It is attached downward in the figure. As the bass speaker (woofer) 15, a dynamic speaker having a cone diaphragm with a diameter of about 16 to 20 cm can be used.

FIG. 2A shows an electronic musical instrument placed on a base 20 (in a state where the upper casing 10 and the lower casing 11 are fitted together).
It is the figure which saw a part and saw from the back, and the figure (B) is
It is the figure seen from the bottom surface. The upper housing 10 is provided with a left channel speaker 14A and a right channel speaker 14B housed in an enclosure.

The lower housing 11 is composed of side plates 17 forming part of the front, rear, left and right side surfaces of the electronic musical instrument, and a bottom plate 16 provided at a predetermined distance from a table 20 as a mounting surface. A mounting hole 18 for the bass speaker 15 is provided at a substantially central portion of the bottom plate 16. This lower housing 11
It can be formed by integral molding with resin. Bottom plate 16
The bass speaker 15 is attached to the hole 18 provided in the so that the opening surface of the speaker 15 faces downward in the drawing.

When the electronic musical instrument constructed as described above is placed on a table 20 such as a desk, a closed space 19 is formed by the bottom plate 16, side plates 17 and table 20. Then, the bass speaker 15 has the closed space 1
The sound including the bass component is radiated toward 9.

In this case, the bottom plate 16 constitutes a part (bottom plate) of the housing of the electronic musical instrument and also functions as a baffle plate. By using the bottom plate 16 also as a baffle plate, a larger area of the baffle plate can be secured as compared with the conventional speaker system, and the baffle effect of suppressing the wraparound of bass can be increased.

Further, since a closed space larger than the closed space in the conventional closed type speaker system can be secured, the suspension formed by the air in the closed space 19 becomes soft and the influence on the bass speaker 15 is reduced. The vibration generated by the bass speaker 15 is efficiently transmitted to the table 20 on which the electronic musical instrument is placed, and the table 20 resonates to generate a sound in which the bass is emphasized. Therefore, a rich bass can be provided, and since the closed space 19 is formed by using the bottom plate 16, a new plate for forming the closed space 19 is not required, and the speaker system is inexpensive. There is also an effect that can be.

In the above structure, if an elastic material such as rubber or plastics is attached to the portion of the side plate 17 in contact with the base 20 to improve the airtightness, sound leakage from the airtight space 19 is reduced, A more bass feeling can be obtained.

(2) Second Embodiment This second embodiment is the same as the first embodiment except that the mounting method of the bass speaker 15 is different. That is, in the second embodiment, as shown in FIG. 3, the bass speaker 15 is attached to the bottom plate 16 so as to be present in the closed space 19, and the opening surface thereof is located outside the closed space 19. It is located in. That is, when the electronic musical instrument is placed on a table 20 such as a desk, a closed space 19 is formed by the bottom plate 16, the side plates 17 and the table 20, and the bass speaker 15 is designed to emit bass sounds outward from the closed space 19. Emits a sound containing components. This means that when the electronic musical instrument is placed on the table 20, the state becomes the same as that of the conventional closed speaker system.

In this case, the bottom plate 16 forms a part (bottom plate) of the housing of the electronic musical instrument and also functions as a baffle plate. By using the bottom plate 16 also as a baffle plate, a larger area of the baffle plate can be secured as compared with the conventional speaker system, and the baffle effect of suppressing the wraparound of bass can be increased.

Further, since a closed space larger than the closed space in the conventional closed type speaker system can be secured, the suspension formed by the air in the closed space 19 becomes soft and the influence on the bass speaker 15 is reduced. From the bass speaker 15, a sound in which the bass is emphasized is generated.

In this way, the bottom plate 16 functions as a baffle plate, and the closed space serves as the capacity of the enclosure in the closed speaker system. The formed suspension becomes soft, and the influence of the sound component radiated from the back surface of the bass speaker 15 on the bass speaker 15 can be eliminated. Therefore, a rich bass feeling can be obtained, and the bottom plate 16
Since the closed space 19 is formed by utilizing, there is an effect that a new plate for making the closed space 19 is not required and the speaker system can be inexpensive.

In the above structure, if an elastic material such as rubber or plastics is attached to the portion of the side plate 17 in contact with the base 20 to improve the airtightness, sound leakage from the airtight space 19 is reduced, A more bass feeling can be obtained.

[0027]

As described in detail above, according to the present invention,
It is possible to provide a speaker system of an electronic musical instrument that can obtain a rich bass feeling.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electronic musical instrument to which a speaker system for an electronic musical instrument of the present invention is applied.

FIG. 2 is a rear view showing the configuration of the first embodiment of the speaker system for the electronic musical instrument of the present invention.

FIG. 3 is a rear view showing the configuration of a second embodiment of the speaker system for the electronic musical instrument of the present invention.

FIG. 4 is a rear view showing a configuration of a speaker system of a conventional electronic musical instrument.

[Explanation of symbols]

 10 Upper Housing 11 Lower Housing 12 Keyboard 13 Operation Panel 14A Left Channel Speaker 14B Right Channel Speaker 15 Bass Speaker 16 Bottom Plate 17 Side Plate 18 Hole 19 Sealed Space 20 Units

Claims (2)

[Claims] 1. A bottom plate provided at a position separated from the mounting surface by a predetermined distance so as to form a closed space by the mounting surface and side plates, and an opening surface formed in a hole formed at a predetermined position of the bottom plate. A speaker system for an electronic musical instrument, comprising: a bass speaker mounted toward the closed space. 2. A bottom plate provided at a position separated from the mounting surface by a predetermined distance so as to form a closed space by the mounting surface and the side plate, and an opening surface formed in a hole formed at a predetermined position of the bottom plate. A speaker system for an electronic musical instrument, comprising: a bass speaker attached to the outside of the closed space.