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 can radiate clear sound over a wide viewing range. 【Background Art】 【0002】 Conventionally, a speaker system that houses a plurality of speakers in a speaker box and radiates sound over a wide viewing range has been known. 【0003】 For example, the speaker system 20 described in Patent Document 1 arranges and houses two speakers 50-1 and 50-2 in a speaker box 30 having a hexagonal cross-section with their sound radiation directions inclined to each other. According to this speaker system 20, it is possible to improve the weakening of the sound radiation force (sound pressure level) from the speakers 50-1 and 50-2, and to expand the viewing range. 【0004】 Also, the speaker system 1 described in Patent Document 2 arranges and houses a plurality of speakers 3a, 3b, 3c, and 3d at equal intervals in the vertical direction in a speaker box 2 having a rectangular cross-section. According to this speaker system 1, the sound radiation force from the speakers 3a, 3b, 3c, and 3d is held by synthesis, and the viewing range can be expanded. 【0005】 However, in the speaker system 20 described in Patent Document 1, since the sounds radiated from the two speakers 50-1 and 50-2 do not overlap, there is a problem that an extremely weak viewing area of the sound pressure level occurs and the viewing position is limited. 【0006】 On the other hand, in the speaker system 1 described in Patent Document 2, although the sounds radiated from the plurality of speakers 3a, 3b, 3c, and 3d overlap in the vertical direction, there is a problem that a viewing area with a weak sound pressure level occurs in the horizontal direction and the viewing position is limited. 【0007】 To solve these problems, the applicant of this application has developed a speaker system in which eight speakers 4, 4, ... are arranged and housed in the circumferential direction on the side plate 56 of a speaker box body 51 having a truncated octagonal pyramidal shape, as shown in Figures 7 to 9 (see Patent Document 3). 【0008】 With this speaker system, the sound radiation areas from adjacent speakers 4,4,... overlap, creating a roughly hemispherical sound field without generating listening areas with low sound pressure levels. [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] Japanese Patent Publication No. 2006-304189 [Overview of the project] [Problems that the invention aims to solve] 【0010】 However, in the speaker system described in Patent Document 3, the speaker box 50 is completely enclosed within the speaker box body 51, so a separate wiring insertion hole had to be drilled in the lid 53, and the power wiring for each speaker 4, 4, ... had to be led out from there. 【0011】 Therefore, it was necessary to drill holes for wiring at the speaker system's installation location, which required drilling and other processing work. Furthermore, routing the power wiring for speakers 4,4,... from inside the speaker box 50 was cumbersome and time-consuming. 【0012】 Furthermore, in the speaker system described in Patent Document 3, the mid-high frequencies are transmitted by each speaker 4, 4, ... ...is radiated directly to the outside, but the lowest frequencies are radiated downwards by the bass that is emitted from each speaker 4,4,..., which wraps around inside the speaker box 50, causing the bottom plate 57 of the speaker box 50 to vibrate. 【0013】 However, because the bottom plate 57 of this speaker system is a flat surface, the direction of radiation for the lowest sound is almost vertical, and the lowest sound does not reach a very wide listening area, resulting in the problem of the sound pressure level attenuating quickly. 【0014】 This invention has been made in view of the above-mentioned problems of the conventional invention, and aims to provide a speaker system that makes it easier to route speaker wiring, allows for easy and quick installation of the speaker system, and enhances the radiation power of the lowest sound so that the lowest sound can reach a wider listening area. [Means for solving the problem] 【0015】 To achieve the above objective, the present invention provides a speaker system comprising a speaker box comprising a speaker box body having a truncated octagonal pyramidal shape and a lid for closing it, and a plurality of speakers housed inside the speaker box body, wherein the speaker box body is characterized in that its sides are formed from eight side plates with openings drilled in them and connected together, and two side pieces with through holes drilled in them and facing each other. 【0016】 The speaker system of the present invention is also a speaker system comprising a speaker box comprising a speaker box body having a truncated decagonal pyramidal shape and a lid for closing it, and a plurality of speakers housed inside the speaker box body, wherein the speaker box body is characterized in that its sides are formed from 10 side plates with openings drilled in them and connected together, and 2 side pieces with through holes drilled in them and facing each other. 【0017】 A key feature of this design is that a hemispherical acoustic covering made of aluminum is fixed to the bottom plate of the speaker box body. 【0018】 The aforementioned acoustic covering may have a magnet fixed to its bottom plate and may be magnetically attached to the bottom plate of the speaker box body for fixation. [Effects of the Invention] 【0019】 According to the speaker system of the present invention, it is easy to lead out the wiring of the speaker at the installation location, enabling the installation of the speaker system to be simple and quick. At the same time, the radiation force of the lowest sound is made stronger, allowing the lowest sound to reach a wide viewing area. 【Brief Description of the Drawings】 【0020】 [Figure 1] FIG. 9 is a bottom view of a speaker system according to an embodiment of the present invention. [Figure 2] FIG. 12 is a plan view of the speaker system shown in FIG. 1 with the lid removed. [Figure 3] FIG. 15 is a plan view of the lid of the speaker system shown in FIG. 1. [Figure 4] For the covering acoustic body of the speaker system shown in FIG. 1, (A) is a plan view, (B) is a side cross-sectional view, and (C) is a bottom view. [Figure 5] FIG. 21 is a cross-sectional view taken along the line A - O - A of the speaker system shown in FIG. 1. [Figure 6] FIG. 24 is a cross-sectional view taken along the line A - O - B of the speaker system shown in FIG. 1. [Figure 7] FIG. 27 is a bottom view of a conventional speaker system. [Figure 8] FIG. 30 is a plan view of the speaker system shown in FIG. 7 with the lid removed. [Figure 9] FIG. 33 is an exploded perspective view of the speaker system shown in FIG. 7. 【Embodiments for Carrying Out the Invention】 【0021】 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 a speaker system according to an embodiment of the present invention, and FIG. 2 is a plan view of the speaker system with the lid removed. 【0022】 As shown in FIGS. 1 to 4, the speaker system 100 of the present invention is composed of a speaker box 10, a speaker 50, and a covering acoustic body 60. 【0023】 As shown in Figures 1 to 3, the speaker box 10 consists of a speaker box body 20 that has a truncated octagonal pyramidal shape and a lid 40 that closes it. 【0024】 The speaker box body 20 is formed by die-casting aluminum, with an opening at the top end. The side section is formed from eight connected trapezoidal side panels 21 and two opposing triangular side pieces 22, and the bottom section is formed from a regular octagonal bottom panel 23. 【0025】 As shown in Figure 2, the upper end of the speaker box body 20 is an opening, but the area around it is formed in a decagonal shape, and a peripheral step portion 24a is formed in the peripheral portion 24. 【0026】 As shown in Figures 1 and 2, the side of the speaker box body 20 is composed of eight connected side panels 21 and two opposing side pieces 22. Four of the side panels 21, 21, ... are sequentially connected along their sides, and the side pieces 22 are connected along their sides at the side panels 21, 21 at both ends. 【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 a through hole 26 for routing the wiring 53 of the speaker 50. 【0028】 As shown in Figures 1 and 2, the bottom surface of the speaker box body 20 is made up of a flat bottom plate 23, but its periphery is formed in a regular octagon shape, and a bolt insertion hole 27 is drilled in the center. 【0029】 Inside the speaker box body 20, as shown in Figure 2, there is a boss portion 31 erected in the center and partition portions 32 erected radially from it. 【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 body 20, and the upper end surface of its upper end projection 31a is flush with the upper end surface of the peripheral portion 24 of the speaker box body 20. Furthermore, a bolt insertion hole 33 is drilled in the center of the boss portion 31, and the lower end of the bolt insertion hole 33 is connected to the bolt insertion hole 27. 【0031】 As shown in Figure 2, the partition portion 32 is formed extending from the circumferential surface of the boss portion 31 to the side surface of the speaker box body 20, and its upper end surface is flush with the upper end surface of the peripheral stepped portion 24a of the speaker box body 20. 【0032】 Furthermore, screw holes 32a, 32a, ... are formed at predetermined positions in the upper end of the partition portion 32, and screw holes 24b, 24b, ... are formed at predetermined positions in the circumferential direction in the upper end of the peripheral stepped portion 24a of the speaker box body 20. 【0033】 Therefore, the inside of the speaker box body 20 is divided into four spaces by the boss portion 31 and the partition portion 32. 【0034】 As shown in Figure 3, the lid 40 is a flat aluminum plate, and its periphery is formed into a decagonal shape so as to match the upper end of the speaker box body 20, and its periphery fits into the peripheral step portion 24a formed on the peripheral portion 24 of the speaker box body 20. 【0035】 Furthermore, a through-hole 41 for inserting a bolt is drilled in the center of the lid 40, and the upper end projection 31a of the boss portion 31 of the speaker box body 20 fits into this through-hole 41. 【0036】 Furthermore, through holes 40a, 40a, ... are drilled in the middle portion of the lid 40 at predetermined positions, and through holes 40b, 40b, ... are drilled in the circumferential portion at predetermined positions. 【0037】 First, as shown in Figures 2, 4, and 5, the speaker box 10 is constructed by attaching the frame portion 51 of each speaker 50 to the openings 25 drilled in the side panels 21, 21, ... of the speaker box body 20, thereby setting each speaker 50 on each side panel 21 and housing it inside the speaker box body 20. 【0038】 Next, the wiring 53 leading out from the vibration generating section 52 of each speaker 50, which is set up and housed inside the speaker box 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 body 20. 【0039】 Furthermore, a fibrous material 70 is filled into the speaker box body 20. Here, glass fiber may be used as the fibrous material 70, and it is particularly preferable to use nanofiber made of polypropylene, cellulose, carbon, etc. 【0040】 By filling the speaker box body 20 with fibrous material 70, the sound absorption effect is enhanced, and noise can be effectively absorbed. 【0041】 Then, by fitting the peripheral portion of the lid 40 onto the peripheral stepped portion 24a of the speaker box body 20, inserting screws through the insertion holes 40a, 40a, ... of the lid 40 and screwing them into the screw holes 32a, 32a, ... of the partition portion 32, and also inserting screws through the insertion holes 40b, 40b, ... of the lid 40 and screwing them into the screw holes 24b, 24b, ... of the peripheral stepped portion 24a, the speaker box body 20 can be closed with the lid 40 to form the speaker box 10. 【0042】 As described above, with the speaker system 100 of the present invention, the work of drilling wiring insertion holes at the installation site is unnecessary, and the wiring 53, 53, ... of each speaker 50, 50, ... can be immediately led out from inside the speaker box 10 by passing it through the insertion hole 26. 【0043】 As shown in Figure 4, the acoustic covering 60 is formed from aluminum into a thin, hollow, hemispherical shape and consists of a hemispherical spherical portion 61 and a flat bottom plate 62. 【0044】 Furthermore, a fitting hole 63 is drilled in the center of the bottom plate 62, and a magnet body 64 is fitted and fixed into this fitting hole 63. 【0045】 Therefore, by fitting and fixing a suitable metal disc-shaped object 28, which will serve as a magnetic material, into a bolt insertion hole 27 drilled in the bottom plate 23 of the speaker box body 20, and then bringing the magnet body 64 into contact with it and magnetically attaching it, the acoustic covering 60 can be fixed and attached to the bottom plate 23 of the speaker box body 20, as shown in Figure 1. 【0046】 As described above, by attaching the acoustic covering 60 to the bottom plate 23 of the speaker box body 20, the lowest sound radiated from the bottom plate 23 is radiated in a hemispherical shape by the hemispherical spherical portion 61, so that it can reach a wide listening area and prevent the sound pressure level from attenuating prematurely. 【0047】 Alternatively, instead of the speaker box body 20 described above, a speaker box body may be used in which the side portion is formed from eight connected trapezoidal side panels 21 and four triangular side pieces 22 that are facing each other at a 90° interval in the circumferential direction. In this case, the upper opening of the speaker box body is formed with a dodecagonal shape around its periphery. 【0048】 Alternatively, instead of the speaker box body 20 having a truncated octagonal pyramidal shape, a speaker box body having a truncated decagonal pyramidal shape may be used. In this case, the speaker box body is formed from 10 connected side panels and 2 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 various embodiments can be adopted as long as they do not depart from the spirit of the present invention. [Explanation of symbols] 【0050】 100 Speaker System 10 speaker boxes 20 Speaker box body 21 Side plate 22 Side piece 23 Bottom plate 25 Opening 26 Through hole 40 Lid 50 speakers 60 Coated acoustic body 62 Bottom plate 64 Magnetic Body

Claims

[Claim 1] A speaker system comprising a speaker box comprising a speaker box body having a truncated octagonal pyramidal shape and a lid for closing it, and a plurality of speakers housed inside the speaker box body, wherein the speaker box body is characterized in that its sides are formed from eight side plates with openings drilled in them and connected together, and two side pieces with through holes drilled in them and facing each other. [Claim 2] A speaker system comprising a speaker box comprising a speaker box body having a truncated decagonal pyramidal shape and a lid for closing it, and a plurality of speakers housed inside the speaker box body, wherein the speaker box body is characterized in that its sides are formed from 10 side plates with openings drilled in them and connected together, and 2 side pieces with through holes drilled in them and facing each other. [Claim 3] The speaker system according to claim 1 or 2, further characterized in that a hemispherical acoustic covering made of aluminum is fixed to the bottom plate of the speaker box body. [Claim 4] The speaker system according to claim 3, characterized in that the covering acoustic body has a magnet fixed to its bottom plate and is magnetically attached to the bottom plate of the speaker box body for fixation.

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