Speaker system

Abstract

To provide a speaker system to be easily installed in a short time and also capable of allowing low-range sound to arrive at a wider viewing region.SOLUTION: A speaker system 100 consists of: a speaker box 10 composed of speaker box bodies 20 having a truncated octagonal pyramid shape and a lid body 40 for closing the speaker box bodies; and a plurality of speakers 50 respectively stored in the speaker box bodies 20. The speaker box body 20 has side surface parts formed of eight connected side surface plates 21 each in which an opening part 25 is perforated, and two opposing side surface pieces 22 each in which a through-hole 26 is perforated. A bottom surface plate 62 of an aluminum-made covering acoustic body 60 having a semi-spherical shape is fixed to a bottom surface plate 23 of the speaker box body 20 with the use of a magnet body 64.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a speaker system that houses a plurality of speakers in a speaker box and is capable of radiating clear sound over a wide listening range. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a speaker system in which a plurality of speakers are housed in a speaker box and sound is radiated over a wide viewing range.

[0003] For example, a speaker system 20 described in Patent Document 1 is configured such that two speakers 50-1, 50-2 are arranged and housed in a speaker box 30 having a hexagonal cross section with the sound emission directions inclined to each other. According to this speaker system 20, it is possible to improve the weakening of the sound radiation power (sound pressure level) from the speakers 50-1 and 50-2, and to expand the viewing range.

[0004] Moreover, the speaker system 1 described in Patent Document 2 is configured to house a plurality of speakers 3a, 3b, 3c, and 3d arranged at equal intervals in the vertical direction within a speaker box 2 having a rectangular cross section. According to this speaker system 1, the sound radiation powers from the speakers 3a, 3b, 3c, and 3d can be synthesized and maintained, thereby expanding the viewing range.

[0005] However, in the speaker system 20 described in Patent Document 1, sounds radiated from the two speakers 50-1, 50-2 do not overlap, resulting in a listening area with an extremely low sound pressure level, which limits the listening position.

[0006] On the other hand, in the speaker system 1 described in Patent Document 2, sounds emitted from multiple speakers 3a, 3b, 3c, and 3d overlap in the vertical direction, but there is a problem in that a viewing area with a weak sound pressure level is created in the horizontal direction, limiting the viewing position.

[0007] In order to solve these problems, the applicant of the present application has developed a speaker system in which eight speakers 4, 4, ... are arranged and stored in the circumferential direction on the side panel 56 of a speaker hook main body 51 having a truncated octagonal pyramid shape, as shown in Figures 7 to 9 (see Patent Document 3).

[0008] According to this speaker system, it is possible to generate a substantially hemispherical sound field without the radiation areas of sounds radiated from adjacent speakers 4, 4, . . . overlapping with each other to create a listening area with a weak sound pressure level. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 11-098588 [Patent Document 2] Japanese Patent Application Publication No. 11-225389 [Patent Document 3] JP 2006-304189 A Summary of the Invention [Problem to be solved by the invention]

[0010] However, in the speaker system described in Patent Document 3 above, speaker box 50 is completely sealed off by speaker box body 51, so separate wiring insertion holes had to be drilled in lid 53 and the power wiring for each speaker 4, 4, ... had to be led out from there to the outside.

[0011] Therefore, it was necessary to drill wiring holes at the installation location of the speaker system, and processing work had to be done using a drill, etc. Also, it was troublesome and time-consuming to lead out the power wiring of the speakers 4, 4, ... from inside the speaker box 50.

[0012] In the speaker system described in Patent Document 3, mid- and high-pitched sounds are generated by the speakers 4, 4, . The lowest sounds are radiated directly to the outside from the speakers 4, 4, ..., but the bass sounds radiated from each speaker 4, 4, ... travel inside the speaker box 50, vibrate the bottom panel 57 of the speaker box 50, and are radiated downward.

[0013] However, because the bottom panel 57 of this speaker system is a flat surface, the direction in which the lowest sound is emitted is approximately vertical, and the lowest sound does not reach a very wide listening area, resulting in the problem that the sound pressure level attenuates early.

[0014] The present invention has been made in consideration of such conventional problems, and has an object to provide a speaker system that makes it easy to lead out speaker wiring, enables the speaker system to be installed simply and in a short time, and has a stronger radiation force for the lowest sound, enabling the lowest sound to reach a wide listening area. [Means for solving the problem]

[0015] In order to achieve the above-mentioned object, the speaker system of the present invention is a speaker system comprising a speaker box consisting of a speaker box body in the shape of a truncated octagonal pyramid and a lid that closes the speaker box body, and a number of speakers housed within the speaker box body, wherein the speaker box body has sides formed from eight connected side panels each having openings formed therein, and two opposing side pieces each having insertion holes formed therein.

[0016] Here, the speaker box is also characterized in that an aluminum hemispherical acoustic covering body is fixed to the bottom plate of the speaker box body.

[0017] The acoustic covering body may have a magnet fixed to its bottom plate, and may be fixed by being magnetically attached to the bottom plate of the speaker box body.

[0018] In addition, the speaker box body may be in the shape of a truncated decagonal pyramid, with the sides formed from ten connected side panels and two opposing side pieces having insertion holes drilled therein. Effect of the Invention

[0019] According to the speaker system of the present invention, the speaker wiring can be easily led out at the installation location, making it possible to install the speaker system simply and in a short time, and also increasing the radiation power of the lowest sound, enabling the lowest sound to reach a wide listening area. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a bottom view of the speaker system according to the embodiment of the present invention. [Diagram 2] 2 is a plan view of the speaker system shown in FIG. 1 with a cover removed. [Diagram 3] 2 is a plan view of a cover of the speaker system shown in FIG. 1. [Figure 4] FIG. 2 is a plan view of the acoustic covering body of the speaker system shown in FIG. 1, FIG. 2 is a side cross-sectional view, and FIG. [Diagram 5] 2 is a cross-sectional view of the speaker system shown in FIG. 1 taken along line AOA. [Figure 6] 2 is a cross-sectional view of the speaker system shown in FIG. 1 taken along line AOB. [Figure 7] FIG. 1 is a bottom view of a conventional speaker system. [Figure 8] 8 is a plan view of the speaker system shown in FIG. 7 with the cover removed. [Figure 9] FIG. 8 is an exploded perspective view of the speaker system shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The speaker system of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a bottom view of the speaker system of one embodiment of the present invention, and Fig. 2 is a plan view of the speaker system with a cover removed.

[0022] A speaker system 100 of the present invention is composed of a speaker box 10, a speaker 50, and an acoustic covering body 60, as shown in FIGS.

[0023] As shown in FIGS. 1 to 3, the speaker box 10 is composed of a speaker box body 20 having a truncated octagonal pyramid shape and a lid 40 that closes the speaker box body.

[0024] The speaker box body 20 is formed by aluminum die casting, with an opening at the upper end and side portions formed by eight connected trapezoidal side panels 21 and two opposing triangular side pieces 22, and the bottom portion formed by a regular octagonal bottom panel 23.

[0025] As shown in FIG. 2, the upper end of the speaker box body 20 is an opening, but the periphery thereof is formed into a decagonal shape, and a peripheral step portion 24a is formed on the peripheral portion 24.

[0026] As shown in Figures 1 and 2, the side portion of the speaker box main body 20 is composed of eight connected side panels 21 and two opposing side pieces 22, with the four side panels 21, 21, ... being connected in sequence at their sides, and the side panels 21, 21 at both ends being connected to the side pieces 22 at their sides.

[0027] As shown in Figures 1 and 2, each side panel 21 has an opening 25 for setting a speaker 50, and each side piece 22 has an insertion hole 26 for leading out wiring 53 of the speaker 50.

[0028] As shown in Figures 1 and 2, the bottom portion of the speaker box body 20 is composed of a flat bottom plate 23, the periphery of which is formed into a regular octagonal shape, and a bolt insertion hole 27 is drilled in the center.

[0029] As shown in FIG. 2, inside the speaker box body 20, a boss portion 31 is formed in the center, and partition portions 32 are formed radially outwardly from the boss portion 31. As shown in FIG.

[0030] As shown in Figures 2, 4 and 5, the boss portion 31 is erected upward from the center of the bottom surface of the speaker box main body 20, and the upper end surface of its upper end protrusion 31a is flush with the upper end surface of the peripheral portion 24 of the speaker box main body 20. A bolt insertion hole 33 is formed in the center of the boss portion 31, and the lower end of the bolt insertion hole 33 communicates with the bolt insertion hole 27.

[0031] As shown in FIG. 2, the partition portion 32 is formed from the peripheral surface of the boss portion 31 to the side portion of the speaker box body 20, and its upper end surface is flush with the upper end surface of the peripheral step portion 24a of the speaker box body 20.

[0032] In addition, screw holes 32a, 32a, ... are formed at predetermined positions at the upper end of the partition portion 32, and screw holes 24b, 24b, ... are formed at predetermined positions in the circumferential direction at the upper end of the peripheral step portion 24a of the speaker box main body 20.

[0033] Therefore, the inside of the speaker box body 20 is divided into four spaces by the boss portions 31 and the partition portions 32.

[0034] As shown in FIG. 3, the cover 40 is a flat aluminum plate with a decagonal periphery formed to match the upper end of the speaker box body 20, and the periphery is adapted to fit into a peripheral step 24a formed in the peripheral portion 24 of the speaker box body 20.

[0035] Also, a through hole 41 for inserting a bolt is drilled in the center of the lid 40, and the upper end protrusion 31a of the boss portion 31 of the speaker box body 20 is adapted to fit into this through hole 41.

[0036] Furthermore, insertion holes 40a, 40a, . . . are formed at predetermined positions in the middle portion of the lid body 40, and insertion holes 40b, 40b, . . . are formed at predetermined positions in the circumferential direction in the peripheral portion thereof.

[0037] As shown in Figures 2, 4 and 5, the speaker box 10 is first constructed by attaching the frame portions 51 of each speaker 50 to openings 25 formed in the side panels 21, 21, ... of the speaker box main body 20, so that each speaker 50 is set on each side panel 21 and stored within the speaker box main body 20.

[0038] Next, the wiring 53 leading out from the vibration generating unit 52 of each speaker 50 set and stored within the speaker box main body 20 is appropriately bundled and led out to the outside through an insertion hole 26 drilled in one of the side pieces 22 of the speaker box main body 20.

[0039] Moreover, the speaker box body 20 is filled with a fibrous material 70. Here, as the fibrous material 70, glass fiber may be used, and in particular, nanofibers made of polypropylene, cellulose, carbon, or the like are preferably used.

[0040] By filling the speaker box body 20 with the fibrous material 70, the sound absorbing effect is enhanced and noise can be absorbed effectively.

[0041] Then, the peripheral portion of the lid body 40 is fitted into the peripheral step portion 24a of the speaker box main body 20, screws are inserted into the insertion holes 40a, 40a, ... of the lid body 40 and screwed into the screw holes 32a, 32a, ... of the partition portion 32, and screws are inserted into the insertion holes 40b, 40b, ... of the lid body 40 and screwed into the screw holes 24b, 24b, ... of the peripheral step portion 24a, thereby closing the speaker box main body 20 with the lid body 40 and configuring the speaker box 10.

[0042] As described above, according to the speaker system 100 of the present invention, there is no need to drill wiring insertion holes at the installation site, and the wiring 53, 53, ... of each speaker 50, 50, ... can be passed through the insertion hole 26 from inside the speaker box 10 and immediately led out.

[0043] As shown in FIG. 4, the acoustic covering body 60 is made of aluminum and molded into a thin, hollow hemispherical body, and is composed of a spherical portion 61 having a hemispherical shape and a bottom plate 62 having a flat surface.

[0044] A fitting hole 63 is formed in the center of the bottom plate 62, and a magnet body 64 is fitted into this fitting hole 63 and fixed thereto.

[0045] Therefore, by fitting and fastening a disk-shaped substrate 28 made of a suitable metal that serves as a magnetic body into the bolt insertion hole 27 drilled in the bottom plate 23 of the speaker box main body 20, and then abutting and magnetically attaching the magnet body 64 to it, the acoustic covering body 60 can be fixed and attached to the bottom plate 23 of the speaker box main body 20, as shown in Figure 1.

[0046] As described above, by attaching the acoustic covering body 60 to the bottom plate 23 of the speaker box main body 20, the lowest sound radiated from the bottom plate 23 is radiated in a hemispherical manner by the spherical portion 61 having a hemispherical shape, so that it can reach a wide listening area and premature attenuation of the sound pressure level can be prevented.

[0047] Incidentally, instead of the above-mentioned speaker box main body 20, a speaker box main body may be used in which the side portion is formed from eight connected trapezoidal side panels 21 and four triangular side pieces 22 opposed to each other at 90° intervals in the circumferential direction. In this case, the upper end opening of the speaker box body is formed so that its periphery has a decagonal shape.

[0048] Moreover, instead of the speaker box body 20 having a truncated octagonal pyramid shape, a speaker box body having a truncated decagonal pyramid shape may be adopted. In this case, the side portion of the speaker box body is formed from ten connected side panels and two opposing side pieces.

[0049] The configuration of one embodiment of the speaker system of the present invention is as described above, but it is not limited to the above-described embodiment, and it goes without saying that various embodiments can be adopted as long as they do not deviate from the gist of the present invention. [Explanation of symbols]

[0050] 100 Speaker System 10 Speaker Box 20 Speaker box body 21 Side plate 22 Side piece 23 Bottom plate 25 Opening 26 Insertion hole 40 Lid 50 speakers 60 Coated acoustic body 62 Bottom plate 64 Magnet body

Claims

1. A speaker system comprising a speaker box comprising a speaker box body in the shape of a truncated octagonal pyramid and a lid body that closes the speaker box body, and a plurality of speakers housed within the speaker box body, wherein the speaker box body has sides formed from eight connected side panels each having openings formed therein, and two opposing side pieces each having insertion holes formed therein.

2. 2. The speaker system according to claim 1, further comprising an aluminum hemispherical acoustic covering body fixed to a bottom plate of the speaker box body.

3. 3. The speaker system according to claim 2, wherein the acoustic covering body has a magnet fixed to its bottom plate and is magnetically attached to the bottom plate of the speaker box body.

4. The speaker system described in any one of claims 1 to 3, characterized in that the speaker box body has a truncated decagonal pyramid shape, and its sides are formed from ten connected side panels and two opposing side pieces with insertion holes drilled therethrough.

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