JP2018082413A - Speaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker system capable of achieving stable sound reproduction with high accuracy, in which unnecessary vibration generated in a first speaker and a second speaker can be mutually cancelled and reduced, the speaker can keep the reference point of amplitude of a diaphragm and can respond to an input signal accurately, without moving significantly, while furthermore can decrease directivity by reducing the time difference of sound waves radiated from the first and second speakers, and can reduce the load applied to the back of the speaker by increasing the volume of the enclosure.SOLUTION: A speaker system S1 has a first speaker 1 and a second speaker 2 arranged to the first speaker 1 so that the front sides face each other, speaker connection fixing means 3 for connecting and fixing the first and second speakers 1, 2, and enclosures 5, 6 provided to cover the back side of the first and second speakers 1, 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to audio equipment, and more particularly to a speaker system.

Many conventional speaker systems have a structure in which a speaker is directly installed and fixed to a speaker housing (enclosure).
Such a structure has a problem that the transmission rate of vibration between the speaker and the enclosure is high, and unnecessary vibration generated in the speaker is transmitted to the enclosure, and unnecessary vibration is generated in the enclosure. Further, there is a problem that air vibration inside and around the enclosure is transmitted to the enclosure, and unnecessary vibration is generated in the enclosure. Furthermore, unnecessary vibration generated in the enclosure is transmitted to the speaker, which hinders the speaker from accurately responding to the input signal.

  In order to solve such a problem, a speaker system (for example, Japanese Patent No. 3778793) having a structure in which a speaker is installed in an enclosure via a cushioning material has been proposed.

  In this speaker system (the above-mentioned structure of Japanese Patent No. 3778793), the speaker is installed in the enclosure via a cushioning material and is in a so-called floating state. Therefore, the stability of the speaker is poor, the speaker moves freely, and vibration occurs. Since the frame and magnetic circuit serving as the reference point of the amplitude of the plate (cone) are shifted and cannot be accurately amplituded, there is a problem that the speaker cannot accurately respond to the input signal. In order to solve such problems, a speaker device (for example, Japanese Patent No. 3484143) having a structure in which a weight is attached to a speaker has been proposed in order to improve the stability of the speaker.

  However, as in the speaker device disclosed in Japanese Patent No. 3484143, if a remarkable effect is obtained only with a weight, the weight of the speaker device increases greatly. Therefore, two speakers are connected to each other back to back. A speaker device (for example, Japanese Patent No. 4744416) having a structure in which these two speakers are installed in an enclosure via a cushioning material while being fixed has been proposed.

  However, the speaker device disclosed in Japanese Patent No. 4744416 is designed to connect and fix two speakers back to back to cancel each other's reaction. However, the volume in the enclosure, particularly the volume behind each cone, is sufficient. In other words, it is difficult to make the distance between the speakers close to each other, so that a time difference occurs between the sound waves emitted from the two speakers, and the directivity becomes strong. Further, when two speakers share the same air chamber, there is a problem that a load applied to the back surface of the speaker becomes large.

Japanese Patent No. 3778793 Japanese Patent No. 3484143 Japanese Patent No. 4744416

  Accordingly, the present inventor has made the present invention by recalling a peaker system that solves the above problems all at once. That is, the object of the present invention is to eliminate unnecessary vibrations generated in the first speaker and the second speaker. While canceling each other and reducing, the speaker does not move stably and largely, the diaphragm amplitude reference point can be maintained and an accurate response can be made to the input signal. Furthermore, the first speaker and the second speaker A speaker capable of reducing the time difference between the sound waves emitted from the sound source and reducing the directivity, and increasing the volume of the enclosure to reduce the load applied to the back of the speaker, enabling highly accurate and stable sound reproduction. To provide a system.

  What solves the said subject is the 1st speaker, the 2nd speaker arrange | positioned so that the front side mutually may oppose this 1st speaker, the said 1st speaker, and the said 2nd speaker A speaker connection fixing means for connecting and fixing; and an enclosure provided so as to cover a rear surface side of the first speaker and the second speaker. Item 1).

  It is preferable that the first speaker and the second speaker generate substantially the same sound wave or the same sound wave having the same low-frequency component (claim 2). It is preferable that the first speaker and the second speaker have the same configuration, the same shape, and the same size. (Claim 3). The enclosure includes a first enclosure provided to cover a rear surface side of the first speaker, and a second enclosure provided to cover a rear surface side of the second speaker, The first enclosure and the second enclosure are preferably connected and fixed by an enclosure connection fixing portion. It is preferable that the first enclosure and the second enclosure have the same configuration, the same shape, and the same dimensions. It is preferable that the enclosure connection fixing part has a speaker penetration part that penetrates the first speaker and the second speaker, and is provided inside the first enclosure and the second enclosure ( Claim 6). Preferably, each of the first enclosure and the second enclosure is formed in a hollow spherical shape. It is preferable that the first speaker and the second speaker are attached to the enclosure via a cushioning material. It is preferable that the enclosure is provided with vibration damping means. The enclosure preferably has an opening (claim 10). It is preferable that the speaker connection fixing means is constituted by a support rod for connecting and fixing the magnetic circuit of the first speaker and the magnetic circuit of the second speaker. It is preferable that the speaker connection fixing means is constituted by a support rod for connecting and fixing the frame of the first speaker and the frame of the second speaker. A diffuser for diffusing or reflecting sound waves radiated from the front side of the first speaker or the second speaker is provided between the first speaker and the second speaker. Preferred (claim 13). Preferably, the enclosure has a function of diffusing sound waves emitted from the front side of the first speaker or the second speaker. Preferably, at least one of the first speaker and the second speaker is provided with weight means for increasing the mass (claim 15).

According to the speaker system of the first aspect, unnecessary vibrations generated in the first speaker and the second speaker can be canceled and reduced, and the speaker does not move stably and does not move greatly. The point can be maintained and the input signal can be accurately responded, and the time difference between the sound waves emitted from the first speaker and the second speaker can be reduced, the directivity can be reduced, and the volume of the enclosure can be increased. Thus, the load applied to the back of the speaker can be reduced, and a speaker system capable of highly accurate and stable sound reproduction is configured.
According to the speaker system described in claim 2, the effect of claim 1 can be achieved more reliably.
According to the speaker system described in claim 3, the effect of claim 1 can be obtained more reliably.
According to the speaker system of the fourth aspect, the distance between the first speaker and the second speaker can be set without being affected by the size or shape of the enclosure, and the degree of freedom of the size or shape of the enclosure. Can be increased. In addition, unnecessary vibrations generated in the first enclosure and the second enclosure can be offset through the enclosure connection fixing portion, and can be further reduced.
According to the speaker system described in claim 5, the effect of claim 1 can be achieved more reliably.
According to the speaker system of the sixth aspect, there is no enclosure connection fixing part (obstacle) outside the first enclosure or the second enclosure, and unnecessary reflection of sound waves can be avoided more.
According to the speaker system of the seventh aspect, the standing wave generated in the first enclosure or the second enclosure can be reduced, and the directivity is lowered by reflecting and diffusing the sound wave on the spherical surface. Can do.
The speaker system according to claim 8 is configured so that unnecessary vibration between the first speaker 1 and the first enclosure or unnecessary vibration between the second speaker 2 and the second enclosure is not transmitted to each other. Thus, the effect of claim 1 can be achieved more reliably.
According to the speaker system of the ninth aspect, unnecessary vibrations in the enclosure and the enclosure can be further reduced.
According to the speaker system of the tenth aspect, the change in the air pressure in the enclosure can be reduced by the opening, the load applied to the first speaker and the rear surface of the second speaker can be further reduced, and the bass reflex effect can be reduced. It can also be added.
According to the speaker system of the eleventh aspect, the speaker system having the effect of the first aspect can be realized with an easy and simple configuration.
According to the speaker system of the twelfth aspect, the speaker system having the effect of the first aspect can be realized with an easy and simple configuration.
According to the speaker system of the thirteenth aspect, the sound wave can be diffused or reflected by the diffuser, and the directivity of the sound wave radiated from the first speaker and the second speaker can be further reduced.
According to the speaker system of the fourteenth aspect, the sound wave can be diffused by the enclosure, and the directivity of the sound wave radiated from the first speaker and the second speaker can be further reduced.
According to the speaker system of the fifteenth aspect, unnecessary vibrations of the two speakers can be further reduced by increasing the inertial mass of the first speaker and the second speaker.

It is a front view of one Example of the speaker system of this invention. It is an AA line end view of FIG. It is a perspective view of the speaker system shown in FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is a front view of the other Example of the speaker system of this invention. It is the CC sectional view taken on the line of FIG. It is a perspective view of the speaker system shown in FIG. It is the DD sectional view taken on the line of FIG.

  In the present invention, the first speaker 1, the second speaker 2 disposed so that the front sides of the first speaker 1 face each other, the first speaker 1, and the second speaker 2 are provided. The speaker connection fixing means 3 for connecting and fixing, and the enclosures 5 and 6 provided so as to cover the rear surface side of the first speaker 1 and the second speaker 2, the first speaker 1 and Unnecessary vibrations generated in the second speaker 2 can be canceled out and reduced, and the first speaker 1 and the second speaker 2 do not move stably and largely, and the amplitude reference point of the diaphragm is maintained and used as an input signal. In addition, it is possible to respond accurately, and further, the time difference between the sound waves radiated from the first speaker 1 and the second speaker 2 can be reduced, the directivity can be lowered, and the volumes of the enclosures 5 and 6 can be increased. Can be possible to reduce the load on the rear speakers 1 and 2, stable sound reproduction is achieved speaker system S1 possible with high accuracy.

The speaker system of the present invention will be described with reference to one embodiment shown in FIGS.
The speaker system S1 of this embodiment includes a first speaker 1, a second speaker 2 arranged so that the front surfaces of the first speaker 1 face each other, the first speaker 1, and the second speaker 2. Speaker connection fixing means 3 for connecting and fixing the speaker 2, enclosures 5 and 6 provided so as to cover the rear surfaces of the first speaker 1 and the second speaker 2, the first speaker 1 and the second speaker 2. And a diffuser 4 for diffusing or reflecting sound waves radiated from the front side of the first speaker 1 or the second speaker 2, and the first speaker 1 and the second speaker 2. The speaker 2 is attached to the enclosures 5 and 6 via cushioning materials 7 and 8. Hereinafter, each configuration will be described in detail.

  As shown in FIG. 2, the first speaker 1 includes a magnetic circuit 1c including a diaphragm 1a, a magnet 1d, and a yoke 1e, and a voice coil 1b that is disposed in a gap portion of the magnetic circuit 1c and connected to the diaphragm 1a. The frame 1f supports the diaphragm 1a and the magnetic circuit 1c. When the first speaker 1 inputs a signal to the voice coil 1b, the voice coil 1b vibrates by the magnetic flux of the magnetic circuit 1c, and the diaphragm 1a vibrates according to the vibration of the voice coil 1b to generate sound waves. It is configured to be emitted.

  The second speaker 2 is disposed so that the front surfaces of the second speaker 2 face each other, and like the first speaker 1, a magnetic circuit 2c including a diaphragm 2a, a magnet 2d, and a yoke 2e. And a voice coil 2b disposed in the gap portion of the magnetic circuit 2c and connected to the diaphragm 2a, and a frame 2f that supports the diaphragm 2a and the magnetic circuit 2c. When the second speaker 2 also inputs a signal to the voice coil 2b, the voice coil 2b vibrates due to the magnetic flux of the magnetic circuit 2c, and the diaphragm 2a vibrates in response to the vibration of the voice coil 2b to generate sound waves. It is configured to be emitted.

  Note that the first speaker 1 and the second speaker 2 of this embodiment have the same configuration, shape, and dimensions. In addition, it is preferable that substantially the same sound wave or low frequency component is generated simultaneously from the first speaker 1 and the second speaker 2 in the voice coil 1b and the voice coil 2b. It is preferable that signals having the same low frequency component are input simultaneously.

  However, in the speaker system of the present invention, the first speaker and the second speaker are not limited to those having the same configuration, shape and size, and the first speaker and the second speaker have different configurations, When the shape and size are used, it is preferable that the respective signals are corrected and input so that substantially the same sound wave or low frequency component is simultaneously generated from the first speaker and the second speaker.

  The speaker connection fixing means 3 is a part for connecting and fixing the first speaker 1 and the second speaker 2, and in this embodiment, as shown in FIG. 2 or FIG. The front side of the magnetic circuit 1c and the front side of the magnetic circuit 2c of the second speaker 2 are configured by a support bar 3 that is connected and fixed. The first speaker 1 and the second speaker 2 are connected and fixed by the speaker connection fixing means 3 so that the front surfaces thereof face each other and extend in the parallel direction.

  The joining position of the magnetic circuit 1c and the speaker connection fixing means (support bar) 3 is preferably the center of gravity of the central portion of the magnetic circuit 1c, and the joining of the magnetic circuit 2c and the speaker connection fixing means (support bar) 3 is performed. The position is also preferably the center of gravity at the center of the magnetic circuit 2c.

  The joining method between the magnetic circuit 1c and the speaker connection fixing means (support bar) 3 and the joining method between the magnetic circuit 2c and the speaker connection fixing means (support bar) 3 are both methods in which the two can be firmly joined and fixed together. Any method may be used as long as it is present, and examples thereof include a method of bonding with an adhesive.

  Furthermore, the distance between the first speaker 1 and the second speaker 2 is preferably as close as possible.

  Thus, in the speaker system S1 of the present invention, the first speaker 1 and the second speaker 2 face each other and are fixed by the speaker connection fixing means (support bar) 3 so that substantially the same sound wave or By simultaneously generating low frequency components, the reaction and vibration of each other are canceled by the speaker connection fixing means (support bar) 3. More specifically, when the low-frequency component is substantially the same sound wave, the speaker connection fixing means (support bar) 3 provides a canceling effect at the low frequency with the largest reaction, so the first speaker 1 and the second speaker 1 Unnecessary vibration generated in the speaker 2 can be significantly reduced. Therefore, the first speaker 1 and the second speaker 2 do not move stably and largely, and the reference point of the amplitude of the diaphragms 1a and 2a can be maintained, so that an accurate response can be made to the input signal. In addition, the same effect can be obtained by using the same configuration, shape, and dimensions for the first speaker 1 and the second speaker 2 and simultaneously inputting the same signal or the same signal with the low frequency component. It will be something. Further, unlike the speaker device disclosed in Japanese Patent No. 4744416, the sound wave generation position is not separated, and the time difference between the sound waves radiated from the first speaker 1 and the second speaker 2 is reduced to reduce the directivity. It can also be made. Furthermore, since the distance between the first speaker 1 and the second speaker 2 can be made sufficiently close, the time difference between the sound wave emitted from the diaphragm 1a and the sound wave emitted from the diaphragm 2a is reduced, and directivity is increased. Therefore, the range of the sound space that can be accurately auditioned is widened, and the reproducibility of sound waves can be further improved.

  Between the first speaker 1 and the second speaker 2, a diffuser 4 that diffuses or reflects sound waves radiated from the front side of the first speaker 1 or the second speaker 2 is provided. Sound waves can be diffused or reflected by the diffuser 4, and the directivity of the sound waves emitted from the first speaker 1 and the second speaker 2 can be further reduced.

  As shown in FIG. 2 or FIG. 4, the diffuser 4 of this embodiment is configured by a spherical body provided on the speaker connection fixing means (support bar) 3. The position where the diffuser 4 is provided is preferably a position equidistant from the first speaker 1 and the second speaker 2 in order to reflect sound waves symmetrically. Moreover, by using a thing with large mass for the diffuser 4, the inertial mass of the 1st speaker 1 and the 2nd speaker 2 can be enlarged, and an unnecessary vibration (reaction) can be reduced.

  The enclosures 5 and 6 are provided so as to cover the rear surface sides of the first speaker 1 and the second speaker 2, respectively. The speaker system S <b> 1 includes the first enclosure 5 that covers the rear surface side of the first speaker 1. And a second enclosure 6 that covers the rear surface side of the second speaker 2.

  As shown in FIG. 2, the first enclosure 5 has a speaker installation opening 5 a for installing the first speaker 1, and the second enclosure 6 is for installing the second speaker 2. The speaker installation opening 6a is provided. The first speaker 1 is attached to the first enclosure 5 by installing the frame 1 f in the first enclosure 5 via a buffer material (annular body) 7. On the other hand, the second speaker 2 is attached to the second enclosure 6 by installing the frame 2 f in the second enclosure 6 via a buffer material (annular body) 8.

As described above, the speaker 1 or the speaker 2 is attached to the first enclosure 5 or the second enclosure 6 via the buffer material 7 or the buffer material 8, thereby the first speaker 1 and the first enclosure 5. The unnecessary vibration between the second speaker 2 and the second enclosure 6 is not transmitted to each other. Further, the buffer material 7 and the buffer material 8 are arranged so as to ensure the airtightness of the installation portion of the first speaker 1 and the installation portion of the second speaker 2. However, the speaker system of the present invention is not limited to one in which the speaker 1 or the speaker 2 is attached to the first enclosure 5 or the second enclosure 6 via the buffer material 7 or the buffer material 8. In addition, a configuration in which no cushioning material is interposed between the speaker 1 or the speaker 2 and the first enclosure 5 or the second enclosure 6 is also included in the scope of the present invention.

  The first enclosure 5 and the second enclosure 6 are each formed in a hollow spherical shape. Accordingly, standing waves generated in the first enclosure 5 or the second enclosure 6 can be reduced, and directivity can be reduced by reflecting and diffusing sound waves on the surface of the sphere.

  The spherical shape referred to in the present application is not limited to a sphere, and is a concept including, for example, an elliptical spherical shape, a hemispherical shape, an egg shape, and the like. In addition, the first enclosure and the second enclosure include those having a wide continuous curved surface such as a cylindrical shape or a deformed shape of a cylinder, and may be a box shape or the like.

  The first enclosure 5 and the second enclosure 6 preferably have the same configuration, shape and dimensions as in this embodiment. Accordingly, the first enclosure 5 and the second enclosure 6, the air in the first enclosure 5 and the air in the second enclosure 6, and the air around the first enclosure 5 and the surroundings of the second enclosure 6 are arranged. Since air vibrates in plane symmetry with respect to a horizontal plane extending substantially between the first speaker 1 and the second speaker 2, the directivity is lowered, and the range of the sound space that can be accurately auditioned In addition, the sound wave reproducibility can be further improved.

  As described above, the speaker system S1 according to the present invention can significantly reduce the directivity, so that the degree of freedom of installation is high, the directivity is low not only in the horizontal direction but also in the vertical direction, and can be installed regardless of the direction. . In addition, due to the canceling effect of the first speaker 1 and the second speaker 2 and the canceling effect of the first enclosure 5 and the second enclosure 6, the strength and vibration stability of the first enclosure 5 and the second enclosure 6 are stabilized. It is not necessary to increase the mass in order to improve the performance, and the weight can be reduced. Further, the first enclosure 5 and the second enclosure 6 are preferably smooth surfaces having no irregularities in order to prevent reflection at a sudden change portion.

  As shown in FIG. 2 or FIG. 4, the first enclosure 5 or the second enclosure 6 has openings 5b and 6b, respectively. These openings 5b and 6b reduce the change in air pressure in the first enclosure 5 or the second enclosure 6 and reduce the load applied to the back surfaces of the first speaker 1 and the second speaker 2, thereby reducing the first. It is possible to ensure an accurate response by the speaker 1 and the second speaker 2. Also, a bass reflex effect can be added using these openings 5b and 6b.

  As shown in FIG. 2 or 4, cylindrical tubes 5 c and 6 c are respectively provided in the openings 5 b and 6 b, and sound absorbing materials 12 and 13 are attached inside the cylindrical tubes 5 c and 6 c. Yes. As a result, leakage of sound waves from the first enclosure 5 or the second enclosure 6 through the openings 5b and 6b is reduced, and the sound waves are attenuated in the cylindrical tubes 5c and 6c to release only the pressure outward. It is configured to be able to.

  Further, as shown in FIG. 2 or 4, disc-shaped sound absorbing materials 14 and 15 are attached to the outside of the cylindrical tubes 5 c and 6 c so as to extend in the horizontal direction. The sound absorbing materials 14 and 15 are configured to convert vibrations into heat, absorb vibrations, attenuate vibrations, and absorb and reduce air vibrations in the first enclosure 5 or the second enclosure 6. .

Further, damping means 10 and 11 are provided on the inner surface of the first enclosure 5 or the second enclosure 6. Also by this, unnecessary vibration in the first enclosure 5 or the second enclosure 6 is converted into heat, vibration absorption and vibration are attenuated, and air vibration in the first enclosure 5 or the second enclosure 6 is reduced. Configured to absorb and reduce.

  The first enclosure 5 and the second enclosure 6 are connected and fixed by enclosure connection fixing portions 9a, 9b, and 9c. Accordingly, the distance between the first speaker and the second speaker can be set without being affected by the size or shape of the enclosure, and the degree of freedom of the size or shape of the enclosure can be increased. Further, unnecessary vibration generated in the first enclosure 5 and the second enclosure 6 can be offset and reduced through these enclosure connection fixing portions 9a, 9b, 9c.

  As shown in FIG. 1, the enclosure connection fixing portions 9a, 9b, 9c of this embodiment are arranged at an equal angle (120 °) apart from each other between the first enclosure 5 and the second enclosure 6. A plurality of (three) enclosure connection fixing portions (support bars) 9a, 9b, and 9c for connecting and fixing the first enclosure 5 and the second enclosure 6 are configured. Further, the enclosure connection fixing portions 9a, 9b, 9c are arranged at equal distances from the centers of the magnetic circuit 1c and the magnetic circuit 2c.

  As described above, the first enclosure 5 and the second enclosure 6 are connected and fixed by the three enclosure connection fixing portions (support bars) 9a, 9b, and 9c, so that the sound pressure behind the first speaker 1 is increased. In the frequency component in which the unnecessary vibration generated in the second enclosure 5 and the unnecessary vibration generated in the second enclosure 6 due to the sound pressure behind the first speaker 2 coincide, three enclosure connection fixing portions (supports) Bar) 9a, 9b, and 9c cancel each other and unnecessary vibrations generated in the first enclosure 5 and the first enclosure 6 are reduced.

  Note that at least one of the first speaker 1 and the second speaker 2 may be provided with weight means for increasing the mass. This affects the speakers 1 and 2 without canceling out errors and differences in the sound waves emitted from the two speakers 1 and 2, but increases the inertial mass of the first speaker 1 or the second speaker 2. By doing so, stability can be improved and unnecessary vibrations of the two speakers 1 and 2 can be further reduced.

Next, another embodiment of the speaker system of the present invention shown in FIGS. 5 to 8 will be described.
The basic difference between the speaker system S2 of this embodiment and the above-described speaker system S1 is that the speaker connection fixing means connects and fixes the frame 21f of the first speaker 21 and the frame 22f of the second speaker 22 to each other. The speaker connection fixing means 23a, 23b, and 23c, and the enclosure connection fixing portion includes a speaker penetration portion 27 that penetrates the first speaker 21 and the second speaker 22, It is a point provided inside the enclosure 25 and the second enclosure 26. Thus, unlike the speaker system S1, the enclosure connection fixing portions (obstacles) 9a, 9b, 9c are not provided outside the first enclosure 5 or the second enclosure 6, and unnecessary reflection of sound waves is further avoided. It is configured to be able to.

  Specifically, the speaker connection fixing means of this embodiment is arranged at an equal distance from the centers of the magnetic circuits 21c and 22c and at an equal angle (120 °), and the frame 21f of the first speaker 21. And the frame 22f of the second speaker 22 are connected and fixed by three speaker connection fixing means 23a, 23b, and 23c, whereby the first speaker 21 and the second speaker 22 are connected and fixed. Has been.

  Further, in the speaker system S2 of this embodiment, the through holes 21g and 22g are provided at the centers of the magnetic circuits 21c and 22c, and the first enclosure 25 and the second enclosure 26 are as shown in FIG. Speaker support portions 25d, 25e, 26d, and 26e for connecting and fixing the speaker penetration portion 27 that penetrates the through holes 21g and 22g, the speaker penetration portion 27, and the inner surface of the first enclosure 25 or the second enclosure 26, respectively. It is connected and fixed inside the enclosure by an enclosure connection fixing part composed of

  The speaker penetrating portion 27 passes through the through holes 21g and 22g, but is configured in a non-contact manner with the magnetic circuits 21c and 22c. Furthermore, the first enclosure 25 and the second enclosure are formed through the through holes 21g and 22g. In order to prevent sound waves from leaking into the enclosure 26, packings 30 and 31 made of a material that hardly transmits vibration are arranged between the magnetic circuits 21c and 22c and the enclosure support portions 25e and 26e, respectively. Has been. With these configurations, unlike the speaker system S1, the enclosure connection fixing portions (obstacles) 9a, 9b, and 9c are not provided outside the first enclosure 5 or the second enclosure 6, and unnecessary reflection of sound waves is further improved. It is configured so that it can be avoided.

  The basic difference between the speaker system S2 and the above-described speaker system S1 is as described above, and the other configurations are substantially the same, but the other configurations of the speaker system S2 will be described in detail below.

  The speaker system S2 of this embodiment includes a first speaker 21, a second speaker 22 disposed so that the front surfaces of the first speaker 21 face each other, the first speaker 21, and the second speaker 21. Speaker connection fixing means 23 a, 23 b, 23 c for connecting and fixing the speaker 22, enclosures 25, 26 provided so as to cover the rear surfaces of the first speaker 21 and the second speaker 22, and the first speaker 21 and a second speaker 22, and a diffuser 24 that diffuses or reflects sound waves radiated from the front side of the first speaker 21 or the second speaker 22, and the first speaker 21 and the second speaker 22 are attached to the enclosures 25 and 26 via cushioning materials 27 and 28. Hereinafter, each configuration will be described in detail.

  As shown in FIG. 6, the first speaker 21 includes a magnetic circuit 21c including a diaphragm 21a, a magnet 21d, and a yoke 21e, and a voice coil 21b that is disposed in a gap portion of the magnetic circuit 21c and connected to the diaphragm 21a. The frame 21f supports the diaphragm 21a and the magnetic circuit 21c. When the first speaker 21 inputs a signal to the voice coil 21b, the voice coil 21b vibrates due to the magnetic flux of the magnetic circuit 21c, and the diaphragm 21a vibrates in response to the vibration of the voice coil 21b to generate sound waves. It is configured to be emitted.

  The second speaker 22 is disposed so that the front surfaces of the second speaker 22 face each other, and, like the first speaker 21, a magnetic circuit 22c including a diaphragm 22a, a magnet 22d, and a yoke 22e. And a voice coil 22b disposed in the gap portion of the magnetic circuit 22c and connected to the diaphragm 22a, and a frame 22f that supports the diaphragm 22a and the magnetic circuit 22c. When the second speaker 22 also inputs a signal to the voice coil 22b, the voice coil 22b vibrates due to the magnetic flux of the magnetic circuit 22c, and the diaphragm 22a vibrates in response to the vibration of the voice coil 22b to generate sound waves. It is configured to be emitted.

  In addition, the 1st speaker 21 and the 2nd speaker 22 of this Example are the same structures, shapes, and dimensions. In addition, since it is preferable that substantially the same sound wave or low-frequency component is generated simultaneously from the first speaker 21 and the second speaker 22 in the voice coil 21b and the voice coil 22b, the same signal or It is preferable that signals having the same low frequency component are input simultaneously.

  However, in the speaker system of the present invention, the first speaker and the second speaker are not limited to those having the same configuration, shape and size, and the first speaker and the second speaker have different configurations, When the shape and size are used, it is preferable that the respective signals are corrected and input so that substantially the same sound wave or low frequency component is simultaneously generated from the first speaker and the second speaker.

  The speaker connection fixing means 23a, 23b, and 23c described above are parts for connecting and fixing the first speaker 21 and the second speaker 22, and the first speaker 21 and the second speaker 22 are connected to these speakers. The connection fixing means 23a, 23b, and 23c are connected and fixed so that the front surfaces thereof face each other and extend in the parallel direction. Specifically, the speaker connection fixing means 23a, 23b, and 23c are configured by support bars 23a, 23b, and 23c that connect and fix the frame 21f of the first speaker 21 and the frame 22f of the second speaker 22. Yes.

  Furthermore, it is preferable that the distance between the first speaker 21 and the second speaker 22 be as close as possible.

  Thus, in the speaker system S2 of the present invention, the first speaker 21 and the second speaker 22 face each other and are fixed by the speaker connection fixing means 23a, 23b, 23c, and substantially the same sound wave or By simultaneously generating the low frequency components, the mutual reaction and vibration are canceled by the speaker connection fixing means 23a, 23b, 23c. Therefore, the first speaker 21 and the second speaker 22 do not move stably and largely, and the reference point of the amplitude of the diaphragms 21a and 22a can be maintained, so that it can respond accurately to the input signal. It is configured. In addition, the same effect can be obtained by simultaneously inputting the same signal or the same low-frequency component signal to the first speaker 21 and the second speaker 22 using the same configuration, shape, and dimensions. It becomes. Furthermore, unlike the Japanese Patent No. 4744416, the generation position of the sound wave is not separated, and the time difference between the sound waves radiated from the first speaker 21 and the second speaker 22 can be reduced to reduce the directivity. it can. Furthermore, since the distance between the first speaker 21 and the second speaker 22 can be made sufficiently close, the time difference between the sound wave emitted from the vibration plate 21a and the sound wave emitted from the vibration plate 22a is reduced, and directivity is increased. Therefore, the range of the sound space that can be accurately auditioned is widened, and the reproducibility of sound waves can be further improved.

  A diffuser 24 that diffuses or reflects sound waves radiated from the front side of the first speaker 21 or the second speaker 22 is provided between the first speaker 21 and the second speaker 22. The diffuser 24 can diffuse or reflect the sound wave, and can further reduce the directivity of the sound wave emitted from the first speaker 21 and the second speaker 22.

  As shown in FIG. 6 or FIG. 8, the diffuser 24 of this embodiment is configured by a spherical body provided in the speaker penetrating portion 27. The position where the diffuser 24 is provided is preferably equidistant from the first speaker 21 and the second speaker 22 in order to reflect sound waves in a plane-symmetric manner. Further, by using a material having a large mass for the diffuser 24, the inertial mass of the first speaker 21 and the second speaker 22 can be increased, and unnecessary vibration (reaction) can be further reduced.

  The enclosures 25 and 26 are provided so as to cover the rear surface sides of the first speaker 21 and the second speaker 22, respectively. The speaker system S2 is a first enclosure 25 that covers the rear surface side of the first speaker 21. And a second enclosure 26 that covers the rear surface side of the second speaker 22.

  As shown in FIG. 6, the first enclosure 25 has a speaker installation opening 25 a for installing the first speaker 21, and the second enclosure 26 is for installing the second speaker 22. The speaker installation opening 26a is provided. The first speaker 21 is attached to the first enclosure 25 by installing the frame 21 f in the first enclosure 25 via a buffer material (annular body) 28. On the other hand, the second speaker 22 is attached to the second enclosure 26 by installing the frame 22 f in the second enclosure 26 via a buffer material (annular body) 29.

As described above, the speaker 21 or the speaker 22 is attached to the first enclosure 25 or the second enclosure 26 via the buffer material 28 or the buffer material 29, thereby the first speaker 21 and the first enclosure 25. The unnecessary vibration between the second speaker 22 and the second enclosure 26 is not transmitted to each other. Further, the buffer material 28 and the buffer material 29 are configured to ensure the airtightness of the installation portion of the first speaker 21 and the installation portion of the second speaker 22. However, the speaker system of the present invention is not limited to the one in which the speaker 21 or the speaker 22 is attached to the first enclosure 25 or the second enclosure 26 via the buffer material 28 or the buffer material 29. In addition, those without a cushioning material are also included in the scope of the present invention.

  The first enclosure 25 and the second enclosure 26 are each formed in a hollow spherical shape. Accordingly, standing waves generated in the first enclosure 25 or the second enclosure 26 can be reduced, and directivity can be reduced by reflecting and diffusing sound waves on the surface of the sphere.

  In addition, the spherical shape as used in this application is not limited to a spherical body, but is a concept including, for example, an elliptical spherical shape, a hemispherical shape, an egg shape, and the like. In addition, the first enclosure and the second enclosure include those having a wide continuous curved surface such as a cylindrical shape or a deformed shape of a cylinder, and may be a box shape or the like.

  The first enclosure 25 and the second enclosure 26 preferably have the same configuration, shape and dimensions as in this embodiment. Accordingly, the first enclosure 25 and the second enclosure 26, the air in the first enclosure 25 and the air in the second enclosure 26, and the air around the first enclosure 25 and the surroundings of the second enclosure 26 are arranged. Since air vibrates in plane symmetry with respect to a horizontal plane extending substantially between the first speaker 21 and the second speaker 22, the directivity is reduced, and the range of the sound space that can be accurately auditioned In addition, the sound wave reproducibility can be further improved.

  As described above, the speaker system S2 of the present invention has a high degree of freedom in installation because the directivity can be remarkably lowered, and the directivity is low not only in the horizontal direction but also in the vertical direction, and can be installed regardless of the orientation. . In addition, due to the canceling effect of the first speaker 21 and the second speaker 22, and the canceling effect of the first enclosure 25 and the second enclosure 26, the strength and vibration stability of the first enclosure 25 and the second enclosure 26 are stabilized. It is not necessary to increase the mass in order to improve the performance, and the weight can be reduced. Further, the first enclosure 25 and the second enclosure 26 are preferably smooth surfaces having no irregularities in order to prevent reflection at a sudden change portion.

  As shown in FIG. 6 or FIG. 8, the first enclosure 25 or the second enclosure 26 has openings 25b and 26b, respectively. By changing the air pressure in the first enclosure 25 or the second enclosure 26 by the openings 25b and 26b and reducing the load applied to the back surfaces of the first speaker 21 and the second speaker 22, the first Therefore, it is possible to secure an accurate response by the speaker 21 and the second speaker 22. Also, a bass reflex effect can be added using these openings 5b and 6b.

  As shown in FIG. 6 or FIG. 8, cylindrical tubes 25c and 26c are provided in the openings 25b and 26b, respectively, and sound absorbing materials 34 and 35 are attached to the inner sides of the cylindrical tubes 5c and 6c, respectively. ing. As a result, leakage of sound waves from the first enclosure 25 or the second enclosure 26 through the openings 25b and 26b is reduced, and the sound waves are attenuated in the cylindrical tubes 25c and 26c to release only the pressure outward. It is configured to be able to.

  Further, as shown in FIG. 6 or FIG. 8, disc-shaped sound absorbing materials 36 and 37 are also attached to the speaker penetrating portion 27 so as to extend in the horizontal direction. These sound absorbing materials 36 and 37 are configured to convert vibrations into heat, absorb vibrations, attenuate vibrations, and absorb and reduce air vibrations in the first enclosure 25 or the second enclosure 26. .

Further, damping means 32 and 33 are provided on the inner surface of the first enclosure 25 or the second enclosure 26. Also by this, unnecessary vibration in the first enclosure 25 or the second enclosure 26 is converted into heat, vibration absorption and vibration are attenuated, and air vibration in the first enclosure 25 or the second enclosure 26 is reduced. Configured to absorb and reduce.

  The first enclosure 25 and the second enclosure 26 are connected and fixed by the above-described enclosure connection fixing portion (the speaker penetration portion 27 and the enclosure support portions 25d, 25e, 26d, and 26e). Accordingly, the distance between the first speaker and the second speaker can be set without being affected by the size or shape of the enclosure, and the degree of freedom of the size or shape of the enclosure can be increased. Further, unnecessary vibration generated in the first enclosure 25 and the second enclosure 26 is configured to be offset and reduced by the enclosure connection fixing portion (the speaker penetration portion 27 and the enclosure support portions 25d, 25e, 26d, and 26e). ing.

  In this way, the first enclosure 21 and the second enclosure 26 are connected and fixed by the enclosure connection fixing portion (the speaker penetration portion 27 and the enclosure support portions 25d, 25e, 26d, and 26e), so that the first speaker 21 is connected. In the frequency components that coincide with the unnecessary vibration generated in the second enclosure 25 due to the rear sound pressure and the unnecessary vibration generated in the second enclosure 26 due to the rear sound pressure of the first speaker 22, the enclosure connection is fixed. The configuration is such that unnecessary vibrations generated in the first enclosure 5 and the first enclosure 6 are reduced by being canceled via the parts (speaker penetrating part 27 and enclosure support parts 25d, 25e, 26d, 26e). .

  Note that weight means for increasing the mass may be provided on at least one of the first speaker 21 and the second speaker 22. This affects the two speakers 21 and 22 without canceling out the error and difference between the sound waves radiated from the two speakers 21 and 22, but the inertia of the first speaker 21 or the second speaker 22. By increasing the mass, stability can be improved and unnecessary vibrations of the two speakers 21 and 22 can be further reduced.

S1 Speaker system 1, 2 Speaker 1a, 2a Diaphragm 1b, 2b Voice coil 1c, 2c Magnetic circuit 1d, 2d Magnet 1e, 2e Yoke 1f, 2f Frame 3 Speaker connection fixing means (support bar)
4 Diffusers 5 and 6 Enclosures 5a and 6a Speaker installation openings 5b and 6b Openings 5c and 6c Cylindrical tubes 7 and 8 Cushioning materials 9a and 9b and 9c Enclosure connection fixing parts 10 and 11 Damping materials 12 and 13 Sound absorbing material 14, 15 Sound absorbing material S2 Speaker system 21, 22 Speakers 21a, 22a Diaphragms 21b, 22b Voice coils 21c, 22c Magnetic circuits 21d, 22d Magnets 21e, 22e Yoke 21f, 22f Frames 21g, 22g Through holes 23a, 23b, 23c Speakers Connection fixing means (support bar)
24 Diffuser 25, 26 Enclosure 25a, 26a Speaker installation opening 25b, 26b Opening 25c, 26c Cylindrical tube 25d, 25e Enclosure support 26d, 26e Enclosure support 27 Speaker penetration 28, 29 Buffer 30, 31 Packing 32, 33 Damping material 34, 35 Sound absorbing material 36, 37 Sound absorbing material

Claims (15)

A first speaker;
A second speaker disposed such that the front sides of the first speaker face each other;
Speaker connection fixing means for connecting and fixing the first speaker and the second speaker;
A speaker system comprising: the first speaker and an enclosure provided so as to cover a rear surface side of the second speaker. The speaker system according to claim 1, wherein the first speaker and the second speaker generate substantially the same sound wave or the same sound wave having a low frequency component simultaneously. The speaker system according to claim 1, wherein the first speaker and the second speaker have the same configuration, the same shape, and the same size. The enclosure includes a first enclosure provided to cover a rear surface side of the first speaker, and a second enclosure provided to cover a rear surface side of the second speaker, The speaker system according to any one of claims 1 to 3, wherein the first enclosure and the second enclosure are connected and fixed by an enclosure connection fixing unit. The speaker system according to claim 4, wherein the first enclosure and the second enclosure have the same configuration, the same shape, and the same size. The enclosure connection fixing part has a speaker penetration part that penetrates the first speaker and the second speaker, and is provided inside the first enclosure and the second enclosure. 5. The speaker system according to 5. The speaker system according to claim 4, wherein the first enclosure and the second enclosure are each formed in a hollow spherical shape. The speaker system according to any one of claims 1 to 7, wherein the first speaker and the second speaker are attached to the enclosure via a cushioning material. The speaker system according to claim 1, wherein the enclosure is provided with vibration damping means. The speaker system according to claim 1, wherein the enclosure has an opening. The speaker system according to any one of claims 1 to 10, wherein the speaker connection fixing means includes a support rod for connecting and fixing the magnetic circuit of the first speaker and the magnetic circuit of the second speaker. . The speaker system according to any one of claims 1 to 11, wherein the speaker connection fixing means is constituted by a support rod for connecting and fixing the frame of the first speaker and the frame of the second speaker. The diffuser which diffuses or reflects the sound wave radiated | emitted from the front side of the said 1st speaker or the said 2nd speaker is provided between the said 1st speaker and the said 2nd speaker. The speaker system according to any one of 1 to 12. The speaker system according to any one of claims 1 to 13, wherein the enclosure has a function of diffusing sound waves emitted from the front side of the first speaker or the second speaker. The speaker system according to any one of claims 1 to 14, wherein at least one of the first speaker and the second speaker is provided with weight means for increasing mass.

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