JP2000217178A - Speaker device - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a speaker device used for various kinds of audio equipment, in which air distortion caused by arrangement of ports is reduced. SOLUTION: The speaker device of the present invention has one opening in a cabinet 2a, and has one opening on an outer surface of the cabinet.
Two ports 3 and 4 having two openings are formed, and these two ports 3 and 4 are provided at acoustically symmetric load positions. With the above configuration, the air compliance on the back surface of the speaker unit 1 is reduced. An excellent loudspeaker device which is uniform and suppresses rolling of a diaphragm, improves sound quality, and enables large input.

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 for various kinds of audio equipment, and more particularly to a phase-reversing (bass reflex) speaker device having a port provided in a part of a cabinet.

[0002]

2. Description of the Related Art Conventionally, as a technique for improving the bass reproduction capability of a speaker device, an air resonance port (hereinafter, referred to as a port) is provided in a part of a cabinet on the back of a speaker unit to resonate a specific frequency. 2. Description of the Related Art A bass reflex type speaker device that inverts the phase of a sound from the inside and enhances the bass range in accordance with the phase of the sound in front of the speaker is used.

In recent years, in the multimedia industry, there has been a demand for a thinner personal computer or the like and a higher quality of the sound to be used together with a thinner one. There is a demand for higher performance.

Hereinafter, such a conventional speaker device will be described with reference to the drawings. FIG. 3 is a schematic structural sectional view of a bass reflex type of the above-mentioned conventional speaker device. According to the figure, 1 is a speaker unit, 2 is a cabinet in which the speaker unit 1 is mounted in an opening, and 3 is a port provided in a part of the cabinet 2.

[0005] The operation of the conventional loudspeaker device configured as described above will be described below. Sound on the back of the speaker unit 1 passes through the cabinet 2 and is radiated through the port 3. At this time, the air in the port 3 causes a specific resonance determined by the internal volume of the cabinet 2 and the port 3,
At this time, the phase is inverted and the radiation is radiated out of the cabinet 2. Therefore, the sound wave radiated from the front surface of the speaker unit 1 is in phase with the sound wave and reinforces each other at that frequency. By setting the resonance frequency of the port 3 and the resonance frequency of the cabinet 2 to a low range, the bass reproduction capability is improved. It was configured as follows.

[0006]

However, in the above-mentioned conventional speaker device, especially in the case of a speaker device constituted by a thin cabinet, the arrangement of the ports 3 is biased to one side of the cabinet 2 because the inside of the cabinet 2 is a narrow space. When the amplitude of the diaphragm (not shown) of the speaker unit 1 increases during bass reproduction, the air compliance in the space a in which the port 3 is not disposed decreases, and in the space b where the port 3 is located, the opening of the port 3 has an opening. Because of the closeness, the air compliance is higher than that of the space a, which is advantageous in terms of space in general in the miniaturization of the speaker device (however, the diaphragm is a non-axisymmetric type having a major axis and a minor axis). Therefore, when the amplitude is large, the diaphragm tends to roll. Due to the non-uniformity of the air compliance in the slot 2, the diaphragm is more likely to roll, the sound pressure frequency characteristic is disturbed, the distortion is increased, and the voice coil (not shown) is formed on the side wall (not shown) of the magnetic gap of the magnetic circuit. (Not shown) may cause an abnormal sound due to contact, and there has been a problem that large input cannot be achieved.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a speaker apparatus which eliminates the above-mentioned drawbacks of the prior art, reduces the occurrence of rolling of a diaphragm of a speaker unit, improves sound quality, and enables large input. And

[0008]

In order to solve the above-mentioned problems, a speaker device according to the present invention has one opening in a cabinet and two ports having one opening on the outer surface of the cabinet. The two ports are installed at acoustically symmetrical load positions.The uniform air compliance on the back of the speaker unit reduces the occurrence of rolling of the diaphragm, improves sound quality, and increases input. An object of the present invention is to provide an excellent speaker device that enables the speaker device.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, there is provided a speaker unit, a speaker unit mounted on the speaker unit, and one opening on the back surface and one opening on the outer surface.
A cabinet provided with two ports having two openings at acoustically symmetric load positions. The two ports make the air compliance on the back of the speaker unit uniform, and the diaphragm at the time of large amplitude is used. , Thereby reducing the occurrence of rolling, improving the sound quality, and increasing the input power.

According to a second aspect of the present invention, a cabinet having a speaker unit mounted therein has a structure in which two or more openings are internally provided and a port having one opening is provided on an outer surface of the cabinet. As a result, the uniformity of the air on the rear surface of the speaker unit is made uniform as in claim 1, thereby reducing the occurrence of rolling of the diaphragm at the time of large amplitude.
It prevents abnormal noise, improves sound quality, and can be realized with a small cabinet rather than large input.

An embodiment of the speaker device according to the present invention will be described below with reference to FIGS. In the description, the same parts as in the related art will be denoted by the same reference numerals, and description will be omitted.

(Embodiment 1) FIG. 1 is a side sectional view of a speaker device according to an embodiment of the present invention. Referring to FIG. 1, reference numeral 2a denotes a cabinet in which a speaker unit 1 is mounted, and 3 and 4 denote cabinets. These ports are provided at positions where acoustically symmetric loads are provided in the cabinet 2a, and are provided integrally with the cabinet 2a.

The operation of the loudspeaker device of the present embodiment configured as described above will be described below. First, sound waves radiated from the back of the speaker unit 1 are transmitted through ports 3 and 4
Radiated through the air. At this time, cabinet 2
a, resonance occurs at a specific frequency determined by the internal volume of port a and port 3 and port 4, respectively.
And 4, respectively, but the sound wave and the sound wave on the front surface of the speaker unit 1 have the same phase and are reinforced as in the conventional technology. Further, in the present embodiment, since a plurality of ports such as ports 3 and 4 are arranged so as to have an acoustically symmetric load, sound waves radiated from the back of the speaker unit 1 are transmitted from the ports 3 and 4 to the air. When radiating inside, the compliance of the air on the back of the diaphragm (not shown) of the speaker unit 1 can be made uniform, the compliance of the air in the cabinet 2a is averaged, and the diaphragm easily moves in parallel. Rolling can be suppressed,
It is possible to increase the input.

In the above embodiment, the lengths of the ports 3 and 4 are set to be the same. However, the length may be changed according to the resonance frequency required by the required acoustic characteristics. The same effects can be obtained even if the lengths and diameters of the ports are different as long as is obtained.

(Embodiment 2) FIG. 2 is a perspective perspective view of a speaker device according to another embodiment of the present invention. Reference numeral 5 denotes an opening 5a in the cabinet 2b provided in the cabinet 2b.
And an opening 5b to the outside of the cabinet 2b.

The port 5 is virtually open 5a.
Port 5b and opening 5c
, And these two ports are provided in the cabinet 2b at positions where the loads are acoustically symmetric as in the first embodiment.

The operation of the loudspeaker of the present embodiment configured as described above will be described. First, a sound wave radiated from the back of the speaker unit 1 enters through the openings 5a and 5b of the port 5, and is radiated from the opening 5c which is gathered on the way.

At this time, the sound load in the cabinet 2b is balanced in the same manner as in the first embodiment, so that all sound waves can be emitted into the air, thereby suppressing the occurrence of rolling at large amplitude and improving sound quality. Can be achieved.

In this embodiment, the cabinet 2b
Two openings 5a and 5b and one opening 5 in the side wall surface
The port 5 of one system having the c
Depending on the shape of the speaker b and the arrangement of the speaker units 1, the same effect can be obtained by further increasing the number of openings in the cabinet 2b, and it is natural that uniform air compliance can be realized. In addition, port 5
May be freely changed depending on the frequency at which the resonance frequency of the port of the cabinet 2b is to be realized.

In the above-described embodiment, the opening to the outside of the cabinet 2b is made smaller than the opening of the port in the cabinet 2b in one place, so that the position of the port 5 is easily restricted. This is particularly useful as a speaker device.

In the above embodiments, the description has been made on the assumption that the ports 4 and 5 are provided integrally with the cabinets 2a and 2b.
a, 2b.

[0022]

As described above, the loudspeaker device according to the present invention makes the compliance of the air on the back of the loudspeaker unit in the cabinet uniform, enables a large amplitude of the diaphragm, and has excellent low distortion and large input. And a speaker device having improved acoustic characteristics.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment of a speaker device according to the present invention.

FIG. 2 is a perspective perspective view of a speaker device according to another embodiment.

FIG. 3 is a side sectional view of a conventional speaker device.

[Explanation of symbols]

 1 Speaker unit 2a, 2b Cabinet 3, 4, 5 port 5a, 5b, 5c Port opening

Claims (2)

[Claims] 1. A speaker unit, comprising: a speaker unit; and a cabinet provided with two ports having one opening on the inside and one opening on the outside surface at acoustically symmetric load positions. A configured speaker device. 2. A cabinet on which a speaker unit is mounted has two or more openings inside the cabinet on the outer surface of the cabinet.
A speaker device configured to incorporate one port having two openings.