JP2010068116A - Internal structure of speaker cabinet, speaker cabinet and speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker system capable of preventing the generation of standing waves and reducing the effects of sound waves emitted inside a casing and returned to a baffle plate, without being attenuated which affect sound quality. <P>SOLUTION: First and second virtual planes 22 and 25 for equally dividing the inside of the casing 4 are assumed, first and second partition plates 13 and 14 are disposed on both sides of the first virtual plane 22, and third and fourth partition plates 15 and 16 are disposed on both sides of the second virtual plane 25. The first partition plate 13 is disposed along the diagonal line 22a of the first virtual plane 22 to partition a left side space 20. The second partition plate 14 is disposed along the diagonal line 22b of the first virtual plane 22 to partition a right side space 21. The third partition plate 15 is disposed along the diagonal line 25a of the second virtual plane 25 to partition a front side space 23. The fourth partition plate 16 is disposed along the diagonal line 25b of the second virtual plane 25 to partition a rear-side space 24. Thus, since a parallel surface is removed, the standing waves are not generated, and the sound waves emitted to the casing 4 repeat complex reflections and are thereby attenuated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention prevents the occurrence of standing waves in the housing of the speaker cabinet, and the sound waves emitted from the back surface of the speaker unit into the housing are reflected in the housing and returned to the speaker unit to be reproduced by the speaker unit. The present invention relates to an internal structure of a speaker cabinet, a speaker cabinet, and a speaker device that can reduce or avoid affecting sound quality.

  A speaker device generally includes a speaker unit and a speaker cabinet. The speaker cabinet is spanned in parallel between the baffle plate on which the speaker unit is mounted, the back plate arranged in parallel with the baffle plate at a predetermined interval, and the baffle plate and the back plate. A rectangular parallelepiped housing is provided that includes left and right left and right plates and upper and lower top and bottom plates that are bridged between a baffle plate and a back plate. In such a speaker device, when sound is output from the speaker unit, sound waves are emitted from the back of the speaker unit into the housing of the speaker cabinet. Further, since the sound wave emitted into the casing is reflected between the inner surfaces of the parallel plates constituting the casing, a standing wave is generated in the casing.

When a standing wave is generated, only the sound of a specific frequency at which the standing wave is generated is echoed or emphasized, so that the sound quality of the sound reproduced by the speaker unit is deteriorated. For this reason, in the speaker device disclosed in Patent Document 1, the first plate member and the left edge portion of the baffle plate that extend in the housing from the right edge portion of the baffle plate toward the left edge portion of the back plate. And the second plate member extending obliquely toward the right edge of the back plate are arranged side by side so that the inner surface of the baffle plate and the inner surface of the back plate are not directly opposed to each other, The inner surface of the right side plate is not directly opposed to reduce the parallel surface in the housing, thereby suppressing the occurrence of standing waves. In the same document, in the vicinity of the bottom plate on the lower side of the second plate material, a third plate material slightly inclined upward from the corners of the bottom plate and the right plate toward the left plate, and the bottom plate and the left plate. By arranging the plate material of the fourth plate material slightly inclined upward from the corner of the wall toward the right side plate, the inner surfaces of the parallel top plate and bottom plate are not directly opposed to each other in the housing. The generation of standing waves is suppressed by reducing parallel planes.
JP 2008-172741 A

  However, in the configuration in which the first and second plate members extending obliquely from the baffle plate toward the back plate are arranged vertically in the housing of the speaker cabinet, the sound waves emitted from the back surface of the speaker unit are It is easy to return to the baffle plate through the first and second plate members after being reflected by the first plate member.

  For example, as schematically shown in the perspective view of the speaker device in FIG. 7, a part of sound waves emitted from the back surface of the speaker unit 102 attached to the baffle plate 101 constituting the housing 100 into the housing. W1 is reflected after reaching the left side plate 103 toward the first plate member 104, and further reflected by the first plate member 104 toward the baffle plate 101. Similarly, a part W2 of the sound wave emitted from the back surface of the speaker unit 102 is reflected after reaching the right side plate 105 and directed to the second plate member 106, and further reflected by the second plate member 106 to the baffle plate 101. Head. Further, a part W3 of the sound wave emitted from the back surface of the speaker unit 102 is reflected by the first plate member 104 and travels toward the left plate 103, but when reflected by the left plate 103, it is reflected by the first plate member 104 again. To the baffle plate 101. Similarly, a part W4 of the sound wave emitted from the back surface of the speaker unit 102 is reflected by the second plate member 106 toward the right plate 105, but when reflected by the right plate 105, it is reflected again by the second plate member 106. To the baffle plate 101.

  Here, if the sound wave emitted into the housing of the speaker cabinet returns to the baffle plate before the sound wave attenuates, the vibration of the vibration plate of the speaker unit attached to the baffle plate is hindered. There is a problem that the sound quality of the sound quality deteriorates.

  In view of the above, the problem of the present invention is to prevent the generation of standing waves in the housing of the speaker cabinet, and to return to the baffle plate before the sound waves emitted into the housing are attenuated. An object of the present invention is to propose an internal structure of a speaker cabinet, a speaker cabinet, and a speaker device that can reduce or avoid affecting the sound quality of reproduced sound.

In order to solve the above problems, the present invention provides an internal structure of a speaker cabinet having a rectangular parallelepiped housing.
A first partition plate and a second partition plate arranged so as to sandwich a vertical or horizontal first virtual plane that bisects the internal space of the housing into a first space and a second space from both sides;
A third partition plate and a fourth partition plate arranged so as to sandwich from both sides a second virtual plane that bisects the internal space into a third space and a fourth space perpendicular to the first virtual plane. And
The first partition plate is arranged along one diagonal line of the first virtual plane and partitions the first space into two,
The second partition plate is arranged along the other diagonal line of the first virtual plane and partitions the second space into two,
The third partition plate is arranged along one diagonal line of the second imaginary plane to partition the third space into two,
The fourth partition plate is arranged along the other diagonal line of the second imaginary plane to partition the fourth space into two.

  According to the present invention, the first and second partition plates are provided on both sides of a vertical or horizontal first virtual plane that bisects the internal space of the housing into a first space and a second space, The first partition plate is disposed along one diagonal line of the first virtual plane to partition the first space into two, and the second partition plate is disposed along the other diagonal line of the first virtual plane to form the second space. Is divided into two. As a result, the first and second partition plates are arranged so as to be inclined between the two sets of parallel inner surfaces facing each other in the housing, so that these two sets of parallel inner surfaces do not directly face each other, Parallel surfaces in the housing are reduced. Further, according to the present invention, the third and fourth partition plates are provided on both sides of the second virtual plane that divides the internal space of the housing into the third space and the fourth space perpendicular to the first virtual plane. And the third partition plate is arranged along one diagonal line of the second virtual plane to partition the third space into two, and the fourth partition plate is the other diagonal line of the second virtual plane. The fourth space is divided into two. As a result, the third and fourth partition plates are arranged so as to be inclined between two sets of parallel inner surfaces facing each other in the housing, so that these two sets of parallel inner surfaces do not directly face each other, Parallel surfaces in the housing are reduced. Here, since the first virtual plane and the second virtual plane are orthogonal to each other, the two sets of parallel inner surfaces that are not directly opposed to each other by the first and second partition plates are disposed, and the third and fourth One set is common and two sets are different from the two sets of parallel inner surfaces that are not directly opposed to each other by arranging the partition plates. Therefore, according to the present invention, by arranging the four partition plates in the casing, all three sets of parallel inner surfaces facing each other in the casing are not directly opposed, and the parallel surfaces existing in the casing are Completely removed. As a result, since it is possible to avoid the sound wave emitted into the housing from being reflected between the two parallel surfaces, it is possible to prevent the standing wave from being generated in the housing.

  In addition, according to the present invention, since the four partition plates are arranged so as to be intricate with each other, the sound wave emitted into the casing repeats complicated reflection. More specifically, a part of the third partition plate or the fourth partition plate is between the first partition plate and two sets of parallel inner surfaces that are not directly opposed by the first partition plate being disposed. Get in. A part of the third partition plate or the fourth partition plate also enters between the second partition plate and the two sets of parallel inner surfaces that are not directly opposed by the second partition plate being disposed. For this reason, even if the sound wave emitted into the housing reaches the first or second partition plate after being reflected within the housing, a part of the sound wave reflected by the first or second partition plate is the third or fourth partition. Reflected by the plate, its traveling direction is changed. In addition, since the sound wave whose traveling direction has been changed subsequently repeats complicated reflection between the inner surface of the housing and the partition plate, before the sound wave emitted from the specific inner surface side in the housing is attenuated. Returning to a specific inner surface can be reduced or avoided. That is, since it is possible to reduce or avoid returning to the baffle plate before the sound wave emitted from the baffle plate side into the housing is attenuated, when the speaker unit is attached to the baffle plate, the diaphragm of the speaker unit It is possible to reduce or avoid the hindrance of vibration. Therefore, the sound quality of the sound reproduced by the speaker unit is improved. Furthermore, the sound waves emitted into the casing are repeatedly complicatedly reflected in the casing, so that the mid- and high-pitched sound regions having strong directivity are efficiently attenuated. Therefore, it is not necessary to arrange a sound absorbing material in the housing. In addition, since the sound path constituted by the four partition plates arranged in the casing and the inner surface of the casing is formed so as not to be plane-symmetric in the casing, the sound waves emitted in the casing are By repeating the reflection, a specific sound range is not emphasized.

  Furthermore, according to the present invention, each partition plate is bridged from the opposite corner portion in the casing to the corner portion, so that each partition plate functions as a brace of the casing. As a result, since the rigidity of the casing is increased, it is possible to avoid the casing from resonating or vibrating due to the sound pressure of the sound wave emitted into the casing. Therefore, even when the speaker unit is attached to the housing, the vibration of the housing is not transmitted to the speaker unit. Therefore, the sound quality of the sound reproduced by the speaker unit is improved.

  In the present invention, it is preferable that the first partition plate and the second partition plate have the same shape, and the third partition plate and the fourth partition plate have the same shape. In this way, the members can be shared. In addition, since each partition plate can be arranged simply by bridging from the opposite corner portion to the corner portion in the housing, the internal structure of the speaker cabinet can be configured at a low cost.

  In the present invention, in order to increase the rigidity of the housing, it is desirable that the end surface portion of each partition plate that is in contact with the inner surface of the housing is fixed to the inner surface of the housing with an adhesive.

  In this case, it is preferable that the end surface portion of any one of the first to fourth partition plates is bonded to the inner surface of the baffle plate. In this way, since the rigidity of the baffle plate itself can be increased, unnecessary vibrations are not transmitted from the baffle plate to the speaker unit when the speaker unit is attached to the baffle plate.

  In the present invention, in order to attenuate the sound wave by intricately reflecting the sound wave emitted into the housing, the internal space is defined as the fifth space and the first virtual plane and the second virtual plane. A first partial partition plate and a second partial partition plate disposed on both sides of a third virtual plane that is equally divided into six spaces, wherein the first partial partition plate includes an inner surface of the housing and each of the second partial partition plates; The fifth space is partially partitioned so as not to be parallel to the partition plate, and the second partial partition plate partially divides the sixth space so as not to be parallel to the inner surface of the housing and each partition plate. It is desirable to partition.

  Next, the present invention can provide a speaker cabinet characterized by having a rectangular parallelepiped housing, and the housing includes the internal structure described above.

  In addition, the present invention includes a rectangular parallelepiped housing, and the housing includes the internal structure described above, and the housing has an opening for communicating the internal space with the outside of the housing. It can be set as the speaker cabinet characterized by being formed. According to the present invention, it is possible to efficiently attenuate the mid-high range of the sound wave emitted into the housing by the above internal structure, and thus it is possible to output a low sound from the opening. In addition, middle and high sounds do not leak from the opening.

  In addition, the present invention has a rectangular parallelepiped housing, the interior of the housing is divided into a plurality of rectangular parallelepiped virtual internal space, each virtual internal space has the internal structure described above It can be set as the speaker cabinet characterized by this. Even in this case, the sound quality of the sound reproduced by the speaker unit attached to the speaker cabinet can be improved in the same manner as the speaker cabinet having only one internal structure in the housing.

  Next, this invention can be made into the speaker apparatus which has said speaker cabinet and a speaker unit.

  According to the internal structure of the speaker cabinet, the speaker cabinet, and the speaker device of the present invention, the sound quality of the sound reproduced by the speaker unit is improved. That is, by arranging four partition plates in the speaker cabinet housing, the parallel surfaces existing in the housing are completely removed, and the sound waves emitted into the housing are reflected between the two parallel surfaces. Therefore, it is possible to prevent a standing wave from being generated in the housing.

  In addition, since the four partition plates are arranged so as to be intricate with each other, the sound wave emitted into the casing repeats complicated reflection. As a result, since it is possible to reduce or avoid returning to the baffle plate before the sound wave emitted from the baffle plate side into the housing is attenuated, it is possible to reduce or avoid inhibiting the vibration of the diaphragm of the speaker unit.

  Furthermore, the sound waves emitted into the casing are repeatedly complicatedly reflected in the casing, so that the mid- and high-pitched sound regions having strong directivity are efficiently attenuated. In addition, since the sound path constituted by the four partition plates arranged in the casing and the inner surface of the casing is formed so as not to be plane-symmetric in the casing, the sound waves emitted into the casing are By repeating the reflection, a specific sound range is not emphasized.

  Moreover, each partition plate arrange | positioned in a housing | casing functions as a bracing of a housing | casing. As a result, since the rigidity of the casing is increased, it is possible to avoid the casing from resonating or vibrating due to the sound pressure of the sound wave emitted into the casing. Even when the speaker unit is attached to the housing, the vibration of the housing is not transmitted to the speaker unit.

  Embodiments of a speaker device to which the present invention is applied will be described below with reference to the drawings.

(Speaker device)
FIG. 1 is a perspective view of the speaker device of this example. As shown in FIG. 1, the speaker device 1 includes a speaker unit 2 and a speaker cabinet 3. The speaker cabinet 3 includes a rectangular parallelepiped housing 4. The housing 4 includes a baffle plate 5, a back plate 6 arranged in parallel with the baffle plate 5 at a predetermined interval, and a baffle plate. The left and right left and right plates 7 and 8 spanned in parallel between 5 and the back plate 6, and the top and bottom top plates 9 spanned in parallel between the baffle plate 5 and the back plate 6. And the bottom plate 10. A speaker mounting hole 11 is formed in the upper right portion of the baffle plate 5, and the speaker unit 2 is mounted on the baffle plate 5 so as to close the speaker mounting hole 11 from the inside of the housing 4. An opening 12 is formed in the lower end portion of the back plate 6, and this opening 12 is a port for outputting low sounds. Inside the housing 4, four partition plates 13, 14, 15, 16 are arranged so as to be inclined.

(Internal structure of speaker cabinet)
FIG. 2 is an exploded perspective view for explaining the internal structure of the speaker cabinet. The internal structure of the speaker cabinet 3 will be described with reference to FIG.

  In order to arrange the four partition plates 13, 14, 15, 16 in the housing 4 of the speaker cabinet 3, first, as shown in FIG. 2A, the internal space of the housing 4 of the speaker cabinet 3. Assuming a vertical first virtual plane 22 that bisects the left and right left spaces (first space) 20 and right space (second space) 21, the first virtual plane 22 is sandwiched from both sides. The second partition plates 13 and 14 are arranged. The first and second partition plates 13 and 14 are rectangular flat plates, and the first partition plate 13 and the second partition plate 14 have the same shape.

  And the 1st partition plate 13 is arrange | positioned along one diagonal 22a of the 1st virtual plane 22, and partitions the left side space 20 into two. That is, the first partition plate 13 is bridged from the corner portion of the baffle plate 5 and the bottom plate 10 to the corner portion of the back plate 6 and the top plate 9 and is in contact with the inner surface of the housing 4 of the first partition plate 13. Fix the end faces of the three sides with an adhesive. Further, the second partition plate 14 is arranged along the other diagonal line 22b of the first virtual plane 22 to partition the right space 21 into two. That is, the second partition plate 14 is bridged from the corner portion of the baffle plate 5 and the top plate 9 to the corner portion of the back plate 6 and the bottom plate 10 and is in contact with the inner surface of the housing 4 of the second partition plate 14. Fix the end faces of the three sides with an adhesive.

  Next, as shown in FIG. 2B, a vertical second virtual space that equally divides the internal space of the housing 4 into two front and rear front spaces (third space) 23 and rear space (fourth space) 24. Assuming the plane 25, the third and fourth partition plates 15 and 16 are arranged so as to sandwich the second virtual plane 25 from both sides. The first virtual plane 22 and the second virtual plane 25 are orthogonal to each other. The third and fourth partition plates 15 and 16 are rectangular flat plates, and the third partition plate 15 and the fourth partition plate 16 have the same shape.

  And the 3rd partition plate 15 is arrange | positioned along one diagonal 25a of the 2nd virtual plane 25, and partitions the front space 23 into two. That is, the third partition plate 15 is bridged from the corner portion of the right side plate 8 and the bottom plate 10 to the corner portion of the left side plate 7 and the top plate 9 and is in contact with the inner surface of the housing 4 of the third partition plate 15. Fix the end faces of the three sides with an adhesive. Moreover, the 4th partition plate 16 is arrange | positioned along the other diagonal 25b of the 2nd virtual plane 25, and partitions the back side space 24 into two. That is, the fourth partition plate 16 is bridged from the corner portion of the left side plate 7 and the bottom plate 10 to the corner portion of the right side plate 8 and the top plate 9 and is in contact with the inner surface of the housing 4 of the fourth partition plate 16. Fix the end faces of the three sides with an adhesive.

  As a result, as shown in FIG. 2C, the four partition plates 13, 14, 15, 16 are arranged in the housing 4 so as to be intertwined with each other. More specifically, the upper part of the third partition plate 15 enters between the first partition plate 13 and the baffle plate 5 and between the first partition plate 13 and the top plate 9. The lower part of the fourth partition plate 16 enters between the first partition plate 13 and the back plate 6 and between the first partition plate 13 and the bottom plate 10. Further, the lower part of the third partition plate 15 enters between the second partition plate 14 and the baffle plate 5 and between the second partition plate 14 and the bottom plate 10. The upper part of the fourth partition plate 16 enters between the second partition plate 14 and the back plate 6 and between the second partition plate 14 and the top plate 9. Here, by applying an adhesive to the intersecting portion 26 where the end face portions of the partition plates 13, 14, 15, 16 intersect at the center position in the housing 4, the four partition plates 13, 14, 15 and 16 are fixed.

(Reflection of sound waves inside the cabinet of the speaker cabinet)
FIG. 3 schematically shows how the sound wave emitted into the housing 4 from the back surface of the speaker unit 2 mounted in the speaker mounting hole 11 of the speaker cabinet 3 is reflected in the housing 4 in the speaker device 1. FIG.

  As shown in FIG. 3, for example, a part of the sound wave A emitted from the back surface of the speaker unit 2 attached to the baffle plate 5 into the housing 4 is reflected by the reflecting portion 8a of the right side plate 8 and then It reaches the second partition plate 14 and is reflected by the reflecting portion 14 a of the second partition plate 14 to go toward the baffle plate 5. However, since the lower half portion of the third partition plate 15 enters between the second partition plate 14 and the baffle plate 5, a part of the sound wave A is reflected by the reflection portion 15 a of the third partition plate 15. The traveling direction is changed, and it faces the right side plate 8. Further, a part of the sound wave A whose traveling direction is changed is then reflected by the reflecting portion 8b of the right side plate 8 toward the second partition plate 14, and is reflected by the reflecting portion 14b of the second partition plate 14 to be the bottom plate. Head to 10. Further, the light is reflected by the reflective portion 10 a of the bottom plate 10 toward the first partition plate 13, and is reflected by the reflective portion 13 a of the first partition plate 13 toward the back plate 6.

  As described above, in the speaker device 1, the sound wave A emitted into the housing 4 repeats complicated reflection, and thus the sound wave A emitted into the housing 4 returns to the baffle plate 5 before it attenuates. Can be reduced. As a result, it is possible to reduce or avoid that the vibration of the diaphragm of the speaker unit 2 attached to the baffle plate 5 is inhibited by the sound wave A.

  In addition, since the parallel surface is completely removed from the inside of the housing 4 by the four partition plates 13, 14, 15 and 16, the sound wave emitted into the housing 4 is reflected between the two parallel surfaces. Can be avoided. As a result, the occurrence of standing waves can be prevented. Furthermore, since the sound path constituted by the four partition plates 13, 14, 15, 16 and the inner surface of the housing 4 is formed so as not to be plane-symmetric in the housing 4, it is discharged into the housing 4. The specific sound range is not emphasized by the repeated reflection of the sound wave A in the housing 4.

  Furthermore, since the sound wave A emitted into the housing 4 repeats complicated reflections within the housing 4, the middle and high sound ranges having strong directivity are efficiently attenuated. Therefore, according to the speaker device 1 of the present example, bass can be output from the opening 12 formed in the housing 4. As a result, middle and high sounds do not leak from the opening 12.

  Further, since the sound wave A can be attenuated by complicated reflection in the housing 4, it is not necessary to dispose the sound absorbing material in the housing 4 to absorb the sound wave A. As a result, the reproducibility of the sound reproduced by the speaker device 1 is deteriorated due to the harmful effects of disposing the sound absorbing material in the housing 4, for example, the natural attenuation of the sound wave A in the housing 4 is inhibited. The disadvantage that the capacity of the casing 4 is sacrificed by the sound-absorbing material disposed in the casing 4 and the reproduction in the low frequency range is disadvantageous does not occur.

  Here, in the speaker device 1, the upper part of the second partition plate 14 arranged so as to incline from the upper edge part of the baffle plate 5 toward the lower edge part of the back plate 6 is in the vicinity of the back surface of the speaker unit 2. Is going through. For this reason, when a low sound is reproduced by the speaker unit 2, the air between the baffle plate 5 and the second partition plate 14 acts as an air spring, and it is possible to suppress the vibration plate of the speaker unit 2 from shaking too much. it can. Therefore, according to the speaker device 1 of the present example, the reproducibility of bass is good.

  Moreover, the end surface part 15b of the 3rd partition plate 15 is contact | abutted to the inner surface of the baffle board 5 along the diagonal 5a of the baffle board 5, and is being fixed with the adhesive agent (refer FIG.2 (b)). As a result, the rigidity of the baffle plate 5 itself is increased, so that unnecessary vibration is not transmitted to the speaker unit 2. Therefore, according to the speaker device 1 of this example, the sound quality of the sound reproduced by the speaker unit 2 is improved.

(Other embodiments)
In addition, the direction in which each partition plate 13, 14, 15, 16 inclines is not restricted to said example. That is, the first partition plate 13 may be disposed along the other diagonal line 22 b of the first virtual plane 22, and the second partition plate 14 may be disposed along one diagonal line 22 a of the first virtual plane 22. Similarly, the third partition plate 15 may be disposed along the other diagonal line 25 b of the second virtual plane 25, and the fourth partition plate 16 may be disposed along one diagonal line 25 a of the second virtual plane 25. Moreover, if each partition plate 13, 14, 15, 16 partitions each corresponding space in two, in the range which does not interfere with the other partition plates 13, 14, 15, 16 arrange | positioned in the housing | casing 4. It can be made into a free shape. Furthermore, when each partition plate 13, 14, 15, 16 is fixed to the inner surface of the housing 4, a metal fitting can be used.

  Further, the position of the speaker mounting hole 11 formed in the baffle plate 5 may be the center of the baffle plate 5 and is not limited to the position of the above example. Further, in the above example, there is one speaker mounting hole 11 formed in the baffle plate 5, and only one speaker unit 2 is mounted on the housing 4 of the speaker cabinet 3. A plurality of speaker mounting holes 11 are formed in 5, and the speaker unit 2 is mounted so as to close each speaker mounting hole 11, whereby a multiway speaker device can be obtained.

(Configuration example including partition plate and partial partition plate)
In the above example, four partition plates 13, 14, 15, and 16 are provided in the housing 4 of the speaker cabinet 3, but in addition to these, two partial partition plates are provided in the housing 4. Can do. FIG. 4 is an exploded perspective view for explaining a configuration example of a speaker cabinet including two partial partition plates. Since the speaker cabinet 3A of the present example has a configuration common to the speaker cabinet 3, the same configuration is denoted by the same reference numeral, and description thereof is omitted.

  FIG. 4A shows the arrangement of four partition plates 13, 14, 15, 16. When two partial partition plates are arranged with respect to these four partition plates 13, 14, 15, and 16, first, as shown in FIG. Assuming a third virtual plane 32 that bisects the internal space of the housing 4 perpendicularly to the plane 25 into an upper space (fifth space) 30 and a lower space (sixth space) 31, this third The first partial partition plate 33 and the second partial partition plate 34 are arranged on both sides of the virtual plane 32.

  And the 1st partial partition plate 33 is arrange | positioned so that it may not become in parallel with the inner surface of the housing | casing 4, and each partition plate 13,14,15,16, and the upper space 30 is partitioned off partially. In this example, the first partial partition plate 33 is disposed along the top plate 9 so as to be inclined rearward from the upper portion of the right side plate 8 toward the upper portion of the left side plate 7. The first partial partition plate 33 reaches the left space 20 from the right space 21 and reaches the rear space 24 from the front space 23. In addition, the second partial partition plate 34 is disposed so as not to be parallel to the inner surface of the housing 4 and the partition plates 13, 14, 15, 16, thereby partially partitioning the lower space 31. In this example, the second partial partition plate 34 is disposed along the bottom plate 10 so as to be inclined rearward from the lower portion of the left side plate 7 toward the lower portion of the right side plate 8. The second partial partition plate 34 reaches the right space 21 from the left space 20 and reaches the rear space 24 from the front space 23. As a result, the inside of the housing 4 of the speaker cabinet 3A is in the state shown in FIG.

  If the speaker unit 2 is mounted in the speaker mounting hole 11 of the speaker cabinet 3A configured as described above, the sound wave emitted from the back surface of the speaker unit 2 into the housing 4 is transmitted to the inner surface of the housing 4 and the partition plates 13 and 14. , 15, and 16 are reflected by the first partial partition plate 33 and the second partial partition plate 34. Therefore, the sound wave emitted into the housing 4 can be attenuated. In particular, it is possible to effectively attenuate the mid- and high-frequency ranges with strong directivity.

  In addition, the 1st partial partition plate 33 and the 2nd partial partition plate 34 should just be arrange | positioned so that it may protrude toward the inner side of the housing | casing 4 from the left side board 7 or the right side board 8, and the top board 9 or It is not necessary to arrange along the bottom plate 10.

(Configuration example in which the first virtual plane is a horizontal plane)
In the above example, the first virtual plane 22 is a vertical plane, but the first virtual plane may be configured as a horizontal plane. FIG. 5 is an exploded perspective view for explaining a configuration example of the speaker cabinet in which the first virtual plane is a horizontal plane. Since the speaker cabinet 3B of the present example has a configuration common to the speaker cabinet 3, the same configuration is denoted by the same reference numeral, and description thereof is omitted.

  In this example, as shown in FIG. 5A, first, a horizontal space that divides the internal space of the housing 4 into two equal parts, an upper and lower upper space (first space) 40 and a lower space (second space) 41. Assuming the first virtual plane 42, the first partition plate 43 and the second partition plate 44 are arranged on both sides of the first virtual plane 42. The first and second partition plates 43 and 44 are rectangular flat plates, and the first partition plate 43 and the second partition plate 44 have the same shape.

  And the 1st partition plate 43 is arrange | positioned along one diagonal line 42a of the 1st virtual plane 42, and partitions the upper space 40 into two. More specifically, the first partition plate 43 is bridged from the corner portion of the baffle plate 5 and the right side plate 8 to the corner portion of the back plate 6 and the left side plate 7, and the housing 4 of the first partition plate 43. The end surface portions of the three sides that are in contact with the inner surface of the substrate are fixed with an adhesive. Further, the second partition plate 44 is arranged along the other diagonal line 42b of the first virtual plane 42 to partition the lower space 41 into two. More specifically, it bridges from the corners of the baffle plate 5 and the left side plate 7 to the corners of the back plate 6 and the right side plate 8 and comes into contact with the inner surface of the housing 4 of the second partition plate 44. The three end face portions are fixed with an adhesive.

  Next, as shown in FIG. 5B, a vertical second virtual plane that is orthogonal to the first virtual plane 42 and divides the internal space of the housing 4 into two equal parts is assumed. In this example, since the second virtual plane 25 similar to that of the speaker cabinet 3 is assumed, the third and fourth partition plates 15 and 16 are arranged in the same manner as the speaker cabinet 3. As a result, as shown in FIG. 5C, the four partition plates 43, 44, 15, and 16 are arranged in the housing 4 so as to be intertwined with each other.

  Even if comprised in this way, the effect similar to the speaker cabinet 3 can be acquired. Further, when the speaker unit 2 is attached to the speaker attachment hole 11 of the speaker cabinet 3B, the same effect as that of the speaker device 1 can be obtained.

  A vertical plane that divides the internal space of the housing 4 into right and left may be assumed as a vertical second virtual plane that is orthogonal to the first virtual plane 42 and bisects the internal space of the housing 4. .

(Configuration example with multiple speaker cabinet internal structures)
Next, a configuration in which a plurality of internal structures of the speaker cabinet 3 are provided in the housing of the speaker cabinet may be employed. FIG. 6 is a perspective view illustrating a configuration example in which a plurality of internal structures of the speaker cabinet 3 are provided in the housing of the speaker cabinet. In addition, in each speaker cabinet shown to FIG. 6 (a), (b), (c), the same code | symbol is attached | subjected to the structure which is common in the internal structure of the speaker cabinet 3, and the description is abbreviate | omitted.

  In the speaker cabinet 3C shown in FIG. 6A, the internal space of the housing 4C of the speaker cabinet 3C is divided into a rectangular parallelepiped upper and lower upper virtual internal space 50 and lower virtual internal space 51. Four partition plates 13, 14, 15, and 16 are disposed in the side virtual internal spaces 50 and 51, respectively.

  In the speaker cabinet 3D shown in FIG. 6B, the internal space of the housing 4D of the speaker cabinet 3D is divided into a left and right left virtual internal space 52 and a right virtual internal space 53 each having a rectangular parallelepiped shape. Four partition plates 13, 14, 15, and 16 are disposed in the internal spaces 52 and 53, respectively.

  In the speaker cabinet 3E shown in FIG. 6C, the internal space of the casing 4E of the speaker cabinet 3E is divided into a front and rear virtual internal space 54 and a rear virtual internal space 55 having a rectangular parallelepiped shape. Four partition plates 13, 14, 15, 16 are arranged in the side virtual internal spaces 54, 55, respectively.

  As described above, even in the speaker cabinets 3C, 3D, and 3E having a plurality of internal structures of the speaker cabinet 3, the same effect as that of the speaker cabinet 3 can be obtained. Further, when the speaker unit 2 is attached to each of the speaker cabinets 3C, 3D, and 3E to obtain a speaker device, the same effect as the speaker device 1 can be obtained.

  When a plurality of internal structures of the speaker cabinet 3 are provided in the housing of the speaker cabinet, the partition plates 13, 14, 15 arranged in different virtual internal spaces depending on the direction in which the rectangular parallelepiped virtual internal spaces are continuous. , 16 may be arranged parallel to each other, and opposing parallel surfaces may be formed. In such a case, a sound wave may be reflected between the formed parallel surfaces and a standing wave may be generated. Therefore, the partition plates 13, 14, which are arranged in different virtual internal spaces, It is desirable to change the inclination direction of each partition plate 13, 14, 15, 16 so that each parallel surface of 15, 16 does not directly face each other. Specifically, between the first partition plate 13 and the second partition plate 14, the diagonal lines 22 a and 22 b of the first virtual plane 22 along which the partition plates 13, 14, 15, 16 are replaced, Between the third partition plate 15 and the fourth partition plate 16, the diagonal lines 25 a and 25 b of the second virtual plane 25 along which the partition plates 13, 14, 15, 16 are interchanged, and parallel surfaces Remove. Alternatively, the parallel planes are removed by changing the direction of the first virtual plane 22 or the second virtual plane 25 and changing the inclination directions of the partition plates 13, 14, 15, 16 so as to correspond thereto. .

It is a perspective view of the speaker apparatus of this example. It is a disassembled perspective view for demonstrating the internal structure of a speaker cabinet, (a) shows arrangement | positioning of the 1st, 2nd partition plate, (b) shows arrangement | positioning of the 3rd, 4th partition plate, (c ) Shows a state in which four partition plates are arranged in the housing. It is explanatory drawing which showed typically a mode that the sound wave discharge | released in the housing | casing from the back surface of the speaker unit attached to the speaker cabinet of FIG. 2 reflected in a housing | casing. It is a disassembled perspective view for demonstrating the structural example of a speaker cabinet provided with two partial partition plates, (a) shows arrangement | positioning of four partition plates, (b) is arrangement | positioning of two partial partition plates. (C) shows a state in which four partition plates and two partial partition plates are arranged in the housing. It is a disassembled perspective view for demonstrating the structural example of the speaker cabinet which made the 1st virtual plane the horizontal surface, (a) shows arrangement | positioning of the 1st, 2nd partition plate, (b) is the 3rd, 4th partition. The arrangement | positioning of a board is shown, (c) has shown the state by which four partition plates are arrange | positioned in a housing | casing. It is a perspective view for demonstrating the structural example provided with several internal structure of the speaker cabinet shown in FIG. 2 in a housing | casing, (a) is an example provided with several internal structure in an up-down direction, (b) is the left-right direction. (C) is an example having a plurality of internal structures in the front-rear direction. In the conventional speaker apparatus, it is explanatory drawing which showed typically a mode that the sound wave discharge | released in the housing | casing from the back surface of the speaker unit reflected in the housing | casing of a speaker cabinet.

Explanation of symbols

1 Speaker device 2, 102 Speaker unit 3, 3A, 3B, 3C, 3D, 3E Speaker cabinet 4, 4C, 4D, 4E, 101 Case 5, 100 Baffle plate 6 Back plate 7, 103 Left side plate 8, 105 Right side plate 9 Top plate 10 Bottom plate 11 Speaker mounting hole 12 Opening 13, 14, 15, 16, 43, 44 Partition plate 20 Left space (first space)
21 Right space (second space)
22, 25, 32, 42 Virtual plane 23 Front space (third space)
24 Rear space (4th space)
26 Intersection 30 Upper space (5th space)
31 Lower space (6th space)
33, 34 Partial partition plate 40 Upper space (first space)
41 Lower space (second space)
50, 51, 52, 53, 54 Virtual internal space 104, 106 Plate material A Sound wave W1-W4 Part of sound wave

Claims (9)

In the internal structure of the speaker cabinet having a rectangular parallelepiped housing,
A first partition plate and a second partition plate arranged so as to sandwich a vertical or horizontal first virtual plane that bisects the internal space of the housing into a first space and a second space from both sides;
A third partition plate and a fourth partition plate arranged so as to sandwich from both sides a second virtual plane that bisects the internal space into a third space and a fourth space perpendicular to the first virtual plane. And
The first partition plate is arranged along one diagonal line of the first virtual plane and partitions the first space into two,
The second partition plate is arranged along the other diagonal line of the first virtual plane and partitions the second space into two,
The third partition plate is arranged along one diagonal line of the second imaginary plane to partition the third space into two,
The internal structure of the speaker cabinet, wherein the fourth partition plate is arranged along the other diagonal line of the second virtual plane to partition the fourth space into two. In the internal structure of the speaker cabinet described in claim 1,
The first partition plate and the second partition plate have the same shape,
The internal structure of the speaker cabinet, wherein the third partition plate and the fourth partition plate have the same shape. In the internal structure of the speaker cabinet according to claim 1 or 2,
An internal structure of a speaker cabinet, wherein an end surface portion of each partition plate in contact with the inner surface of the housing is fixed to the inner surface of the housing by an adhesive. In the internal structure of the speaker cabinet according to claim 3,
An internal structure of a speaker cabinet, wherein an end surface portion of any one of the first to fourth partition plates is bonded to an inner surface of a baffle plate. In the internal structure of the speaker cabinet described in any one of claims 1 to 4,
A first partial partition plate disposed on both sides of a third virtual plane that bisects the internal space into a fifth space and a sixth space orthogonal to the first virtual plane and the second virtual plane; Having a second partial partition,
The first partial partition plate partially partitions the fifth space so as not to be parallel to the inner surface of the housing and each partition plate,
The internal structure of a speaker cabinet, wherein the second partial partition plate partially partitions the sixth space so as not to be parallel to the inner surface of the housing and each partition plate. It has a rectangular parallelepiped housing
A speaker cabinet comprising the internal structure described in any one of claims 1 to 5. It has a rectangular parallelepiped housing
The housing includes the internal structure described in any one of claims 1 to 5,
The speaker cabinet is characterized in that an opening for communicating the internal space with the outside of the housing is formed in the housing. It has a rectangular parallelepiped housing
The inside of the housing is divided into a plurality of cuboid-shaped virtual internal spaces,
Each virtual internal space is provided with the internal structure as described in any one of Claims 1 thru | or 5, The speaker cabinet characterized by the above-mentioned.   A speaker device comprising the speaker cabinet according to claim 6, 7 or 8 and a speaker unit.

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