JP2004343286A - Speaker assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker assembly which can actuate a diaphragm to vibrate with fidelity for acoustic signals while reducing the vibration of a cabinet and can more improve the sound quality, compared with the conventional one. <P>SOLUTION: The speaker assembly comprises a cabinet 10 having first and second openings 11, 12 disposed with a first space 14 interposed therebetween, a main speaker 20 disposed in the first opening 11 with its diaphragm surface outside, and a sub-speaker 30 disposed in the second opening 12 with its diaphragm surface outside. The first and the second openings 11, 12 are formed at positions at which the outward center axes of the main speaker 20 and the sub-speaker 30 are not just opposite. The main speaker 20 and the sub-speaker 30 are fed with the same signal in mutually opposite phases and driven so that no pressure change occurs in the first space 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a speaker device, and more particularly, to a speaker device capable of improving sound quality.
[0002]
[Prior art]
FIG. 8 is a side sectional view schematically showing a conventional speaker device.
The speaker device 100 includes a cabinet 103 in which the interior is divided into two spaces 101 and 102, a main speaker (for sound emission) 105 in which the diaphragm surface is housed and arranged in the space 101 so as to face outward, and a diaphragm. The surface is configured to include a sub-speaker (for controlling air pressure) 106 housed and arranged in the space 102 toward the space 101.
[0003]
An acoustic signal from a signal source (not shown) is supplied to both speakers 105 and 106 via a power amplifier (not shown), and both speakers 105 and 106 are driven in phase. In other words, when the diaphragm of the main speaker 105 moves outward (in the direction of the solid arrow), the diaphragm of the sub speaker 106 also moves in the direction of the space 101 (in the direction of the solid arrow), thereby suppressing an increase in the volume of the space 101. It has become. When the diaphragm of the main speaker 105 moves in the direction of the space 102 (the direction of the broken arrow), the diaphragm of the sub speaker 106 moves in the direction of the space 102 (the direction of the broken line), and the volume of the space 101 decreases. It can be suppressed.
According to such a speaker device 100, the equivalent volume of the space in the cabinet is enlarged, and the bass reproduction characteristic is improved (see Patent Document 1 below).
[0004]
FIG. 9 is a side sectional view schematically showing another conventional speaker device.
The speaker device 110 includes a hollow and cylindrical cabinet 111, two speakers 112 and 113 arranged at both ends of the cabinet 111 so as to be back to back, a back surface of a magnetic circuit 112 a of the speaker 112, and a magnetic member of the speaker 113. And a rib 114 for fixing the rear surface of the circuit 113a.
[0005]
An in-phase acoustic signal is supplied to each of the speakers 112 and 113. By supplying an in-phase acoustic signal to each of the speakers 112 and 113, the diaphragm of the speaker 112 is moved outward (in the direction of the solid arrow). ), The diaphragm of the speaker 113 also moves outward (in the direction of the solid arrow), and when the diaphragm of the speaker 112 moves inward (in the direction of the broken arrow), the diaphragm of the speaker 113 also moves inward. In the direction (in the direction of the broken arrow), so that the vibration of the yoke constituting the magnetic circuit of the speaker is offset via the rib 114.
According to such a speaker device 110, it is described that the vibration of the yoke (magnetic circuit portion) can be efficiently suppressed and the acoustic conversion efficiency of the diaphragm can be increased (see Patent Document 2 below).
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 5-97197
[Patent Document 2]
JP 2001-352592A
[0007]
[Problems to be solved by the invention]
According to the speaker device 100 described in Patent Document 1, it is possible to reduce the air resistance of the rear surface of the diaphragm of the main speaker 105, that is, to reduce the pressure imbalance that the diaphragm of the main speaker 105 receives on the front and rear surfaces. It is possible to increase the fidelity of the amplitude operation of the diaphragm of the main speaker 105 with respect to the acoustic signal. However, the main speaker 105 and the sub speaker 106 are arranged on the same axis in the same direction, and As a result, the vibration transmitted from each of the speakers 105 and 106 to the cabinet 103 is doubled, and there is a problem that the sound quality is greatly reduced due to unnecessary vibration transmitted from the speakers 105 and 106 to the cabinet 103.
[0008]
Further, in the speaker device 110 described in Patent Document 2, although the effect of reducing the vibration transmitted from the speakers 112 and 113 to the cabinet 111 can be enhanced, the back pressure load applied to the diaphragms of the speakers 112 and 113 is large. In other words, it is difficult to reproduce the amplitude operation of the diaphragm faithful to the acoustic signal, and it is difficult to improve the acoustic characteristics.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and enables not only the amplitude operation of a diaphragm to be performed faithfully with respect to an acoustic signal, but also the vibration of a cabinet to be reduced. It is an object to provide a speaker device that can be improved.
[0010]
Means for Solving the Problems and Their Effects
In order to achieve the above object, a speaker device (1) according to the present invention has a first cabinet formed such that a first opening and a second opening are arranged with a first space therebetween. A main speaker having a diaphragm surface facing outward in the first opening, and a sub-speaker having a diaphragm surface facing outward in the second opening. Wherein the first opening and the second opening are formed at positions where the directions of the center axis of the main speaker and the center axis of the sub-speaker with respect to the outward direction are not exactly opposite to each other, and The same signal is supplied to the speaker and the sub-speaker in opposite phases, and the main speaker and the sub-speaker are driven such that a pressure change in the first space does not occur.
[0011]
According to the speaker device (1), the same signal is supplied to the main speaker and the sub-speaker in opposite phases, and the main speaker and the sub-speaker are connected so that a pressure change in the first space does not occur. Is driven. Therefore, the back pressure load applied to the main speaker is eliminated, the amplitude operation of the diaphragm of the main speaker is performed linearly with respect to the acoustic signal, and the fidelity of the amplitude operation of the diaphragm with respect to the acoustic signal is increased. Thus, the acoustic characteristics can be improved.
[0012]
Further, since the phase of the vibration transmitted from the main speaker to the first cabinet and the phase of the vibration transmitted from the sub-speaker to the first cabinet are opposite, the vibration from each speaker causes the first cabinet to pass through. It is offset at the stage of transmission. Therefore, the vibration transmitted to the first cabinet at the time of driving each speaker is immediately eliminated, and the generation of unnecessary sound due to the vibration of the first cabinet is suppressed, and the deterioration of sound quality is prevented. it can.
That is, it is possible to simultaneously improve the sound quality by improving the amplitude operation characteristic of the diaphragm of each speaker (eliminating the back pressure load) and improving the sound quality by eliminating the vibration transmitted to the first cabinet. The sound quality can be further improved.
[0013]
Further, in the speaker device (2) according to the present invention, in the speaker device (1), a buffer is provided between the first opening and the main speaker and between the second opening and the sub-speaker. It is characterized in that a member is interposed.
[0014]
According to the speaker device (2), since the main speaker and the sub-speaker are supported by the buffer member in a floating state with respect to the first cabinet, from the main speaker or the sub-speaker to the cabinet. The transmitted vibration can be greatly reduced. Therefore, the vibration transmitted to the first cabinet can be eliminated more quickly, and the generation of unnecessary sound from the first cabinet can be prevented, and the deterioration of sound quality can be prevented.
[0015]
The speaker device (3) according to the present invention is the speaker device (2), wherein a first support member that supports the magnetic circuit unit of the main speaker in the first space, and a magnetic circuit of the sub speaker. A second support member for supporting the unit in the first space, between the magnetic circuit unit of the main speaker and the first support member, and / or between the first support member and the second support member. A buffer member is interposed between the first cabinet and the first cabinet, and between the magnetic circuit portion of the sub-speaker and the second support member and / or between the second support member and the first cabinet. It is characterized in that a buffer member is interposed between them.
[0016]
According to the speaker device (3), the magnetic circuit portion of the main speaker is supported by the first support member, and the magnetic circuit portion of the sub-speaker is supported by the second support member. When the magnetic circuit is not supported, it is possible to reduce the vibration of the magnetic circuit caused by the amplitude operation of the loudspeaker diaphragm, and to prevent a decrease in efficiency of energy transfer from the loudspeaker diaphragm to air. And sound quality characteristics can be improved.
Further, the vibration transmitted from the magnetic circuit section of each speaker to the first cabinet can be significantly reduced by the buffer member, and a decrease in sound quality due to the vibration of the first cabinet can be prevented.
[0017]
Further, in the speaker device (4) according to the present invention, in any one of the speaker devices (1) to (3), the main speaker disposed in the first opening is disposed so as to face outward. A second cabinet that has a third opening and covers the entire first cabinet except for the first opening with a second space therebetween; and a second cabinet that covers the first cabinet. And a third support member for supporting the first support member inside the first opening portion and the third opening portion, between the first cabinet and the third support member, and / or A buffer member is interposed between the third support member and the second cabinet.
[0018]
In the speaker devices (1) to (3), the sound output from the main speaker and the sound output from the sub-speaker have opposite phases. Although the sound may be canceled, according to the speaker device (4), the entire first cabinet excluding the first opening in which the main speaker is disposed by the second cabinet is formed. Since it is configured to be covered by the second space, sound is output only from the main speaker to the front of the second cabinet, and sound emitted from the front of the sub speaker is the second sound. It is also possible to invert and output the phase in the second cabinet, thereby expanding the bass reproduction limit.
[0019]
In addition, the first cabinet is supported in the second cabinet by the third support member, and the buffer member prevents vibration of the first cabinet from being transmitted to the second cabinet. Thus, it is possible to prevent a decrease in sound quality due to unnecessary vibration of the second cabinet.
[0020]
Further, the speaker device (5) according to the present invention, in any one of the speaker devices (1) to (3), is arranged such that a predetermined portion including the first opening of the first cabinet is exposed to the outside. And a third cabinet for covering a predetermined portion including the second opening of the first cabinet with a third space therebetween, wherein the fourth opening is provided. And a buffer member interposed between the first cabinet and the first cabinet.
[0021]
According to the speaker device (5), substantially the same effects as those of the speaker device (4) can be obtained, and the first cabinet and the third cabinet do not need the third support member. Can be easily assembled.
[0022]
The speaker device (6) according to the present invention, in any one of the speaker devices (1) to (3), has a fourth space extending from the front to the rear of the second opening of the first cabinet. A fourth cabinet is provided, wherein the fourth space is formed to have substantially the same volume as the volume of the first space.
[0023]
According to the speaker device (6), since the fourth space is formed to have substantially the same volume as the volume of the first space, the back pressure load acting on the sub speaker is eliminated. And the speaker can be driven more linearly.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a speaker device according to the present invention will be described with reference to the drawings. FIG. 1 is a side cross-sectional view schematically illustrating the speaker device according to Embodiment (1).
[0025]
In the figure, reference numeral 10 denotes a cabinet in which a speaker is housed. A circular first opening 11 and a second opening 12 are formed on the front surface of the cabinet 10. A partition plate 13 that partially partitions the inside of the cabinet 10 up and down extends in a horizontal direction from a substantially central portion of the front surface of the cabinet 10, and a rear portion of the cabinet 10 is formed in an arc shape in a cross-sectional view. The opening 11 and the second opening 12 are formed so as to be arranged with the first space 14 therebetween.
[0026]
A main speaker 20 including a diaphragm 21, a voice coil (not shown), a magnetic circuit unit 22, and a frame 23 connecting the diaphragm and the like is provided in the first opening 11 so that the diaphragm surface faces outward. The sub-speaker 30 having the same configuration as the main speaker 20 is disposed in the second opening 12 with the diaphragm surface facing outward. The speaker device 1 is configured to include the speaker 30 and the sub speaker 30.
[0027]
An output terminal of an amplifier (not shown) is connected to the main speaker 20 and the sub-speaker 30 so that the same acoustic signal is supplied in opposite phases (ie, the polarity of the output terminal of the amplifier). (+,-) Are connected so that the main speaker 20 and the sub speaker 30 are reversed.)
[0028]
In such a speaker device 1, when the same signal is supplied to the main speaker 20 and the sub speaker 30 in the opposite phase, when the diaphragm 21 of the main speaker 20 moves outward (in the direction of the solid arrow), When the diaphragm of the speaker 30 moves in the first space 14 direction (the direction of the solid line arrow), and when the diaphragm 21 of the main speaker 20 moves in the direction of the first space 14 (the direction of the broken line arrow), the sub-speaker is moved. The diaphragm 30 moves outward (in the direction of the dashed arrow).
[0029]
Therefore, the main speaker 20 and the sub speaker 30 are driven so that the pressure change in the first space 14 does not occur, and the back pressure load applied to the diaphragm 21 of the main speaker 20 is eliminated. The amplitude operation of the diaphragm 21 is performed linearly with respect to the acoustic signal, the fidelity of the amplitude operation of the diaphragm with respect to the acoustic signal is increased, and the sound quality is improved.
[0030]
The vibration generated by the main speaker 20 when the speaker device 1 is driven is transmitted to the rear from the first opening 11 of the cabinet 10 through the frame 23, and the vibration generated by the sub speaker 30 is transmitted through the frame. It propagates backward from the second opening 12 of the cabinet.
[0031]
In the speaker device 1, since the phase of the vibration transmitted from the main speaker 20 to the cabinet 10 and the phase of the vibration transmitted from the sub-speaker 30 to the cabinet 10 are opposite, the vibration from the speakers 20 and 30 propagates through the cabinet 10. The vibrations transmitted to the cabinet 10 are instantaneously eliminated at some stages, and the generation of unnecessary sound from the cabinet 10 is suppressed.
[0032]
According to the speaker device 1 according to Embodiment (1), the sound quality can be improved by eliminating the back pressure load acting on the main speaker 20 (that is, by improving the amplitude operation characteristics of the diaphragm), and It is possible to simultaneously improve the sound quality by the vibration transmitted from the sub speaker 20 and the sub-speaker 30 being canceled out by the cabinet 10 (that is, by eliminating the vibration transmitted to the cabinet 10). Can be planned.
[0033]
In addition, in the speaker device 1 according to Embodiment (1), the case where the first opening 11 and the second opening 12 are formed on the same plane has been described. The first opening 11 and the second opening 12 may be formed at positions where the directions of the center axis of the main speaker 20 and the center axis of the sub-speaker 30 with respect to the outward direction are not opposite to each other. Can be applied to cabinets.
[0034]
FIG. 2 is a side sectional view schematically showing the speaker device according to Embodiment (2). However, in the speaker device 1A according to the embodiment (2), the buffer member 40 is interposed between the first opening 11 and the second opening 12 of the cabinet 10 and the main speaker 20 and the sub-speaker 30. Since the configuration is substantially the same as that of the speaker device 1 shown in FIG. 1 except for the points described above, components having the same functions are denoted by the same reference numerals, and description thereof will be omitted.
[0035]
Between the periphery of the first opening 11 of the cabinet 10 and the periphery of the frame 23 of the main speaker 20 and between the periphery of the second opening 12 of the cabinet 10 and the periphery of the frame of the sub-speaker 30, respectively. An annular buffer member 40 having an L-shaped cross section is interposed.
[0036]
The cushioning member 40 may be made of a material having cushioning properties and excellent in vibration absorption. For example, a compressed body of a synthetic fiber such as a nonwoven fabric or a foamable resin such as urethane foam can be used. .
[0037]
The periphery of the first opening 11 of the cabinet 10, the cushioning member 40, and the outer periphery of the frame 23 of the main speaker 20 are screwed at several places. The peripheral edge, the buffer member 40, and the outer peripheral portion of the frame of the sub-speaker 30 are screwed at several places.
[0038]
According to the speaker device 1A according to Embodiment (2), the main speaker 20 and the sub-speaker 30 are supported in a floating state with respect to the cabinet 10 by the cushioning member 40. Vibration transmitted to the cabinet 10 can be significantly reduced. Therefore, the vibration transmitted to the cabinet 10 can be eliminated more quickly, and the generation of the unnecessary sound from the cabinet 10 can be prevented, so that the deterioration of the sound quality can be effectively prevented.
[0039]
FIG. 3 is a side sectional view schematically showing the speaker device according to Embodiment (3). However, the configuration of the speaker device 1B according to Embodiment (3) is substantially the same as that of the speaker device 1A shown in FIG. 2 except that support members 50A and 50B for supporting the magnetic circuit portion of each speaker are provided. Therefore, the same reference numerals are given to components having the same function, and the description thereof will be omitted.
[0040]
A support member 50A that supports the magnetic circuit section 22 of the main speaker 20 is provided at a position behind the first opening 11 in the first space 14 of the cabinet 10. FIGS. 4A and 4B are a front view and a side view schematically showing the support member 50A.
[0041]
The support member 50A is formed of a nonmagnetic metal such as aluminum or zinc, and has a fitting portion 52 having a fitting hole 51 for fitting the magnetic circuit portion 22 of the main speaker 20, and a fitting portion 52. And a cushioning member 41 having the same function as the cushioning member 40 is provided on the inner wall of the fitting hole 51 of the fitting portion 52. ing.
The distal end surface of each column 53 is fixed to the inner wall of the cabinet 10 and the partition plate 13 via a buffer member 42 having the same function as the buffer member 40.
[0042]
A support member 50B for supporting the magnetic circuit portion 32 of the sub-speaker 30 similar to the support member 50A is also provided at a position behind the second opening 12 in the first space 14 of the cabinet 10.
[0043]
According to the speaker device 1B according to Embodiment (3), the magnetic circuit section 22 of the main speaker 20 is supported in the first space 14 by the support member 50A, and the magnetic circuit of the sub speaker 30 is supported by the support member 50B. The portion 32 is supported in the first space 14, and the magnetic circuit portion generated when the magnetic circuit portions 22 and 32 of the speakers 20 and 30 are not supported due to the amplitude operation of the diaphragm of the speaker. Vibration can be reduced, energy transmission efficiency from the diaphragm of each of the speakers 20 and 30 to air can be prevented from lowering, and sound quality characteristics (transient characteristics of sound) can be improved. The above effect can be further enhanced by setting the weight of the support members 50A and 50B to twice or more the weight of the main speaker 20 and the sub speaker 30 respectively.
Further, the vibration transmitted to the cabinet 10 from the magnetic circuit portions 22 and 32 of the main speaker 20 and the sub-speaker 30 can be significantly reduced by the buffer members 41 and 42, and the deterioration of sound quality due to the vibration of the cabinet 10 can be prevented. Can be.
[0044]
FIG. 5 is a side sectional view schematically showing the speaker device according to Embodiment (4). However, components having the same functions as those of the speaker device 1A shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
[0045]
A first opening 11 in which the main speaker 20 is provided and a second opening 12 in which the sub-speaker 30 is provided are formed on the front surface of the semi-elliptical cabinet 10A with a step. In addition, the first opening 11 and the second opening 12 are formed so as to be arranged with the first space 14 therebetween. An output terminal of an amplifier is connected to the main speaker 20 and the sub speaker 30 so that the same acoustic signal is supplied in the opposite phase.
[0046]
In addition, between the inner wall of the first opening 11 of the cabinet 10A and the outer peripheral portion of the frame of the main speaker 20 and between the inner wall of the second opening 12 of the cabinet 10A and the outer peripheral portion of the frame of the sub speaker 30; An annular buffer member 40 having an L-shaped cross section is interposed.
[0047]
Further, the cabinet 10A has an opening 15 for arranging the main speaker 20 disposed in the first opening 11 toward the outside, and the entire cabinet 10A except for the first opening 11 is the first cabinet 11A. The second space 16 is accommodated in a substantially elliptical spherical cabinet 17 which covers the space 16.
[0048]
At a predetermined position in the second space 16 of the cabinet 17, a support member 60 that supports the cabinet 10A is provided. The support member 60 is a support member 50A for supporting the magnetic circuit portion of the speaker shown in FIG. 4 formed for supporting the cabinet 10A. The support member 60 is formed of, for example, metal or the like, and is fitted with the cabinet 10A. The fitting portion 62 includes a fitting portion 62 having a fitting hole 61 formed therein, and three prismatic columns 63 extending from the fitting portion 62. The fitting portion 62 has an inner wall of the fitting hole 61 of the fitting portion 62. Is provided with a buffer member 43 having the same function as the buffer member 40.
[0049]
Further, the distal end surface of each column 63 is fixed to the inner wall of the cabinet 17 via a buffer member 44 having the same function as the buffer member 40. An annular cushioning member 45 having the same function as the cushioning member 40 is interposed between the first opening 11 of the cabinet 10A and the opening 15 of the cabinet 17.
A stand 19 is connected to a substantially central portion of the bottom surface of the cabinet 17.
[0050]
In such a speaker device 1C, when the same acoustic signal is supplied to the main speaker 20 and the sub-speaker 30 in opposite phases, the main speaker 20 and the sub-speaker 30 are controlled so that the pressure change in the first space 14 does not occur. Are driven, sound is output only from the main speaker 20 from the front of the cabinet 17, and the sound output from the sub-speaker 30 is output from the port 18 with its phase inverted in the cabinet 17.
[0051]
In the speaker device 1C, the phase of the vibration transmitted from the main speaker 20 to the cabinet 10A is opposite to the phase of the vibration transmitted from the sub-speaker 30 to the cabinet 10A. The vibration transmitted to the cabinet 10A is canceled at the transmission stage, and the vibration transmitted to the cabinet 10A is immediately eliminated. Further, the cabinet 10A is supported by the support member 60 in the cabinet 17 via the buffer member 43, so that the vibration of the cabinet 10A is Is more difficult to be transmitted to the cabinet 17, and a decrease in sound quality due to unnecessary vibration of the cabinet 17 is prevented.
[0052]
In the speaker devices according to the above embodiments (1) to (3), the sound output from the main speaker 20 and the sound output from the sub-speaker 30 have opposite phases. Although the sound may be canceled in a wide bass range, according to the speaker device 1 </ b> C according to Embodiment (4), the first opening 11 in which the main speaker 20 is provided by the cabinet 17 is removed. Since the entire cabinet 10A except for the second space 16 is covered with the space, the sound is output only from the main speaker 20 to the front, and the sound emitted from the front of the sub speaker 30 is Thus, the output is inverted with the phase inverted, so that the bass reproduction limit can be expanded.
Further, the cabinet 10A is supported in the cabinet 17 by the support member 60, and the vibration of the cabinet 10A can be prevented from being transmitted to the cabinet 17 by the cushioning members 43 and 44, and the sound quality is prevented from deteriorating due to unnecessary vibration of the cabinet 17. can do.
[0053]
FIG. 6 is a side sectional view schematically showing the speaker device according to Embodiment (5). However, components having the same functions as those of the speaker device 1A shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
[0054]
A first opening 11 for disposing the main speaker 20 and a second opening 12 for disposing the sub-speaker 30 are formed on both end surfaces of the cylindrical cabinet 10B having a substantially U-shaped cross section. The first opening 11 and the second opening 12 are formed so as to be arranged with the first space 14 therebetween. An output terminal of an amplifier is connected to the main speaker 20 and the sub speaker 30 so that the same acoustic signal is supplied in opposite phases.
[0055]
In addition, between the inner wall of the first opening 11 of the cabinet 10B and the outer peripheral portion of the frame of the main speaker 20 and between the inner wall of the second opening 12 of the cabinet 10B and the outer peripheral portion of the frame of the sub speaker 30, An annular buffer member 40a having a concave cross section is interposed.
[0056]
In the figure, reference numeral 70 denotes a cabinet, and a circular opening 71 for disposing the cabinet 10B is formed at a rear position on the upper surface of the substantially box-shaped cabinet 70. In the opening 71 of the cabinet 70, the upper portion of the cabinet 10B including the main speaker 20 disposed in the first opening 11 is disposed so as to be exposed with the annular buffer member 46 interposed therebetween. , The lower part of the cabinet 10B including the sub-speaker 30 is disposed with the fourth space 72 therebetween.
[0057]
According to the speaker device 1D according to Embodiment (5), substantially the same effects as those of the speaker device 1C according to Embodiment (4) can be obtained, and the support member 60 and the like are not required, and the cabinet 10B And the cabinet 70 can be easily assembled.
[0058]
FIG. 7 is a side sectional view schematically showing the speaker device according to Embodiment (6). However, components having the same functions as those of the speaker device shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
[0059]
A first opening 11 for disposing the main speaker 20 and a second opening 12 for disposing the sub-speaker 30 are formed on the front surface of the semi-elliptical cabinet 10C with a step. The first opening 11 and the second opening 12 are formed so as to be arranged with the first space 14 therebetween. An output terminal of an amplifier is connected to the main speaker 20 and the sub speaker 30 so that the same acoustic signal is supplied in opposite phases.
[0060]
Further, between the inner wall of the first opening 11 of the cabinet 10C and the outer peripheral portion of the frame of the main speaker 20 and between the inner wall of the second opening 12 of the cabinet 10C and the outer peripheral portion of the frame of the sub speaker 30. Each is provided with an annular buffer member 40a having a concave cross section.
[0061]
A cabinet 73 having a fourth space 74 extending from the front to the back of the second opening 12 of the cabinet 10C is provided below the cabinet 10C, and the volume of the fourth space 74 is reduced to the first space. 14 are formed to have the same volume. The rear of the cabinet 73 is an opening 75.
[0062]
According to the speaker device 1E according to the embodiment (6), since the volume of the fourth space 74 is formed to be the same as the volume of the first space 14, the speaker device 1E acts on the sub speaker 30. The conventional back pressure load can be eliminated, and the speaker can be driven more realistically.
In the above-described embodiment (6), the speaker device 1E is configured by the two cabinets 10C and 73 having the same space volume. However, in another embodiment, the speaker device 1E has the same volume. It is also possible to configure a single cabinet in which two spaces are separated inside.
[Brief description of the drawings]
FIG. 1 is a side sectional view schematically showing a speaker device according to Embodiment (1) of the present invention.
FIG. 2 is a side sectional view schematically showing a speaker device according to Embodiment (2).
FIG. 3 is a side sectional view schematically showing a speaker device according to Embodiment (3).
4A and 4B are diagrams schematically showing a support member of the speaker device according to Embodiment (3), where FIG. 4A is a front view and FIG. 4B is a side view.
FIG. 5 is a side sectional view schematically showing a speaker device according to Embodiment (4).
FIG. 6 is a side sectional view schematically showing a speaker device according to Embodiment (5).
FIG. 7 is a side sectional view schematically showing a speaker device according to Embodiment (6).
FIG. 8 is a side sectional view schematically showing a conventional speaker device.
FIG. 9 is a side sectional view schematically showing another conventional speaker device.
[Explanation of symbols]
1, 1A-1E speaker device
10, 10A-10C cabinet
11, 12 opening
14 First space
20 Main speaker
30 sub speaker

Claims (6)

A first cabinet formed such that the first opening and the second opening are arranged with a first space therebetween;
A main speaker in which a diaphragm surface is disposed outward in the first opening;
A sub-speaker in which the diaphragm surface is disposed outward in the second opening;
The first opening and the second opening are formed at positions where the directions of the center axis of the main speaker and the center axis of the sub-speaker with respect to the outward direction are not exactly opposite,
The same signal is supplied to the main speaker and the sub-speaker in opposite phases, and the main speaker and the sub-speaker are driven such that a pressure change in the first space does not occur. apparatus. The speaker device according to claim 1, wherein a buffer member is interposed between the first opening and the main speaker and between the second opening and the sub speaker. A first support member that supports the magnetic circuit unit of the main speaker in the first space;
A second support member that supports the magnetic circuit unit of the sub-speaker in the first space,
A buffer member is interposed between the magnetic circuit unit of the main speaker and the first support member and / or between the first support member and the first cabinet, and further includes a magnetic member of the sub speaker. The buffer member is interposed between a circuit part and the second support member and / or between the second support member and the first cabinet. Speaker device. A third opening for arranging the main speaker disposed in the first opening outwardly is provided, and the entire first cabinet excluding the first opening is a second cabinet. A second cabinet that covers the space of
A third support member for supporting the first cabinet in the second cabinet,
Between the first opening and the third opening, between the first cabinet and the third support member, and / or between the third support member and the second cabinet. The speaker device according to any one of claims 1 to 3, wherein a buffer member is interposed therebetween. A predetermined opening including a fourth opening for exposing a predetermined portion including the first opening of the first cabinet to the outside, and including the second opening of the first cabinet; A third cabinet covering the portion with a third space therebetween,
The speaker device according to any one of claims 1 to 3, wherein a buffer member is interposed between the fourth opening and the first cabinet. A fourth cabinet having a fourth space extending from front to back of the second opening of the first cabinet;
The speaker device according to any one of claims 1 to 3, wherein the fourth space is formed to have substantially the same volume as the volume of the first space.

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