JPS6338617Y2

JPS6338617Y2 -

Info

Publication number: JPS6338617Y2
Application number: JP2363283U
Authority: JP
Priority date: 1983-02-18
Filing date: 1983-02-18
Publication date: 1988-10-12
Also published as: JPS59129286U

Description

【考案の詳細な説明】産業上の利用分野本考案はスピーカシステム、特にそのキヤビネ
ツト構造に関するものである。[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a speaker system, particularly its cabinet structure.

従来例の構成とその問題点近年、大型のラジオ受信機付きカセツトテープ
レコーダ、音声多重テレビジヨン受像機等に見ら
れるように、一般オーデイオ機器も、従来のスピ
ーカとセツト本体との一体形からスピーカシステ
ム分離形に変わりつつあり、よりHi−Fi化へと
進んできている。そのため、高級Hi−Fi製品に
比べて低コストが要求される一般オーデイオ機器
に適し、しかも高性能なスピーカシステムを実現
することが大きな課題となつてきている。Conventional configurations and their problems In recent years, as seen in large cassette tape recorders with radio receivers, audio multiplex television receivers, etc., general audio equipment has changed from the conventional integrated speaker and set body to the speaker. The system is changing to a separate type, and the trend is toward more Hi-Fi. Therefore, it has become a major issue to create a high-performance speaker system that is suitable for general audio equipment, which requires lower cost than high-end Hi-Fi products.

以下に従来のスピーカシステムについて説明す
る。第１図は従来のスピーカシステムの一部切欠
き斜視図、第２図は同断面図であり、１はキヤビ
ネツトで、スピーカ２を取り付けてある。キヤビ
ネツト１の内室にはもう一つの小キヤビネツト３
が設けられており、スピーカ２を包む空間６と残
りの空間７とに音響的に分離されている。空間６
と７との間には第１のポート４が設けられ、空間
７にはさらにその開口がスピーカ２の取り付け面
にある第２のポート５が設けられている。 A conventional speaker system will be explained below. FIG. 1 is a partially cutaway perspective view of a conventional speaker system, and FIG. 2 is a sectional view of the same. Reference numeral 1 designates a cabinet to which a speaker 2 is attached. There is another small cabinet 3 in the interior of cabinet 1.
is provided, and is acoustically separated into a space 6 surrounding the speaker 2 and a remaining space 7. space 6
A first port 4 is provided between and 7, and a second port 5 whose opening is on the mounting surface of the speaker 2 is further provided in the space 7.

まず、低域においては、小キヤビネツト３によ
り構成される空間６を全容積の約1/2とすると、
この容積の呈するキヤビネツトコンプライアンス
は小さく、スピーカ２の背面からの音は、空間
６，７間に設けられた第１のポート４を通過して
空間７に至る。すなわち、低域においては空間
６，７の呈するキヤビネツトコンプライアンスの
大きさは、小キヤビネツト３を取り除いて、空間
６，７を合成した値となる。この合成コンプライ
アンスと第２のポート５とによつて周波数_O1で
音響共振を生じる。この共振による低域能率の向
上は従来のバスレフと同じ動作により得られるも
のである。次にもう少し高い周波数を見ると、こ
んどは空間６と第１のポート４とにより音響共振
を生じる。すなわち、空間６のキヤビネツト容積
を上記のようにキヤビネツト全容積の約1/2とす
ると、この空間６の呈するキヤビネツトコンプラ
イアンスは、上記従来のバスレフと同じ動作時の
空間６，７の合成コンプライアンスの1/2となる。
ここで、第１のポート４の等価質量を第２のポー
ト５の等価質量と同じとすれば、空間６のキヤビ
ネツトコンプライアンスと第１のポート４の等価
質量とにより生じる第２の音響共振周波数_O2は
_O1よりも高くなる。この共振による音響出力は、
空間７と第２のポート５とを介して外部に放射さ
れる。従つて、第１の音響共振による低域の音圧
レベルの向上、すなわち従来のバスレフ方式の特
性に、さらに第２の音響共振が少し高い周波数で
加わり、従来のバスレフに比べて、さらに有効な
低域能率の向上が図れ、小型スピーカシステムの
低域再生には非常に適した方式である。 First, in the low range, assuming that the space 6 constituted by the small cabinet 3 is approximately 1/2 of the total volume,
The cabinet compliance exhibited by this volume is small, and the sound from the back of the speaker 2 passes through the first port 4 provided between the spaces 6 and 7 and reaches the space 7. That is, in the low range, the magnitude of the cabinet compliance exhibited by the spaces 6 and 7 is the value obtained by removing the small cabinet 3 and combining the spaces 6 and 7. This composite compliance and the second port 5 create an acoustic resonance at frequency _O1 . The improvement in low frequency efficiency due to this resonance is achieved by the same operation as a conventional bass reflex. Next, looking at a slightly higher frequency, acoustic resonance is caused by the space 6 and the first port 4. In other words, if the cabinet volume of space 6 is approximately 1/2 of the total volume of the cabinet as described above, the cabinet compliance exhibited by this space 6 is the combined compliance of spaces 6 and 7 during the same operation as the conventional bass reflex bass reflex. It becomes 1/2 of that.
Here, if the equivalent mass of the first port 4 is the same as the equivalent mass of the second port 5, the second acoustic resonance caused by the cabinet compliance of the space 6 and the equivalent mass of the first port 4 The frequency _O2 is
Higher than _O1 . The acoustic output due to this resonance is
It is radiated to the outside via the space 7 and the second port 5. Therefore, in addition to the first acoustic resonance, which improves the sound pressure level in the low range, which is the characteristic of the conventional bass reflex system, the second acoustic resonance is added at a slightly higher frequency, making it even more effective than the conventional bass reflex system. This method improves low frequency efficiency and is very suitable for low frequency reproduction in small speaker systems.

しかしながら上記のような従来構成では、キヤ
ビネツト１内に小キヤビネツト３を設け、さらに
第１のポート４を備える必要があるため、キヤビ
ネツト構造が複雑となつて、一般オーデイオ機器
用のスピーカシステムとしては、コストが高くな
つてしまうという問題点があつた。また２つの空
間６，７の容積をそれぞれW_B1，W_B2とすると、
その比率W_B1／W_B2によつて低域特性は第３図に
示すように変化し、低域での音圧レベルを上げる
ためにはW_B1≧W_B2とする方が有効である。なお
第３図において、実線イはW_B1＝W_B2、破線ロは
W_B1＝１／３W_B2、一点鎖線ハはW_B1＝3W_B2の場合をそれぞれ示している。 However, in the conventional configuration as described above, it is necessary to provide the small cabinet 3 within the cabinet 1 and also to provide the first port 4, so the cabinet structure becomes complicated, and it is difficult to use as a speaker system for general audio equipment. The problem was that the cost would be high. Also, if the volumes of the two spaces 6 and 7 are W _B1 and W _B2 , respectively,
Depending on the ratio W _B1 /W _B2 , the low frequency characteristics change as shown in FIG. 3, and it is effective to set W _B1 ≧W _B2 in order to increase the sound pressure level in the low frequency range. In Figure 3, the solid line A indicates W _B1 = W _B2 , and the broken line B indicates
W _B1 =1/3W _B2 , and the dashed dotted line C indicates the case where W _B1 =3W _B2 .

考案の目的本考案は上記従来の欠点を解消するもので、キ
ヤビネツト構造を簡単にできるとともに、キヤビ
ネツト容積の分割比率のW_B1≧W_B2の条件を満た
す高性能で低コストのスピーカシステムを提供す
ることを目的とする。Purpose of the invention The present invention solves the above-mentioned conventional drawbacks, and provides a high-performance, low-cost speaker system that simplifies the cabinet structure and satisfies the condition of the cabinet volume division ratio W _B1 ≧ W _B2 . The purpose is to

考案の構成上記目的を達するため、本考案のスピーカシス
テムは、キヤビネツトに形成されたスピーカ取付
穴に沿う円弧状部とこの円弧状部の両端からキヤ
ビネツト側板まで水平に延びる平面部とを有しか
つキヤビネツト裏板とは間隔をあけてキヤビネツ
ト前板に固着された第１の仕切板と、この第１の
仕切板と同様な形状で第１の仕切板の下方に細隙
をあけて配置されかつキヤビネツト前板とは間隔
をあけてキヤビネツト裏板及び側板に固着された
第２の仕切板と、この第２の仕切板とキヤビネツ
ト底面との間の空間内に配置された１つのバスレ
フポートとを備えた構成である。Composition of the Invention In order to achieve the above object, the speaker system of the present invention has an arcuate portion along the speaker mounting hole formed in the cabinet, and a flat portion extending horizontally from both ends of the arcuate portion to the side plate of the cabinet. The cabinet back plate consists of a first partition plate fixed to the cabinet front plate with a space therebetween, and a partition plate having a similar shape to the first partition plate and arranged below the first partition plate with a narrow gap. The cabinet front plate has a second partition plate fixed to the cabinet back plate and side plate with a space therebetween, and one bass reflex port arranged in the space between the second partition plate and the bottom surface of the cabinet. This configuration is equipped with the following features.

実施例の説明以下、本考案の一実施例について、図面に基づ
いて説明する。第４図〜第６図において、８はキ
ヤビネツト、９はスピーカ、１０はスピーカ取付
穴、１１は第１のポート、１２は第２のポート、
１３，１４は小空間、１５，１６は仕切板であ
る。仕切板１５は、キヤビネツト８に設けたスピ
ーカ取付穴１０に添つて円弧状に形成し、その両
端はキヤビネツト側板まで水平に延ばし、キヤビ
ネツト前板とともに固着し、キヤビネツト裏板と
は間隔を設けて配置されている。仕切板１６は、
仕切板１５と同様な形状とするが、仕切板１５と
細隙を設けてキヤビネツト８の裏板及び側板に固
着し、キヤビネツト前板とは間隔を設けて配置さ
れている。仕切板１５，１６の下部には、その開
口がスピーカ取付け面にある第２のポート１２が
設けられている。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 4 to 6, 8 is a cabinet, 9 is a speaker, 10 is a speaker mounting hole, 11 is a first port, 12 is a second port,
13 and 14 are small spaces, and 15 and 16 are partition plates. The partition plate 15 is formed in an arc shape along the speaker mounting hole 10 provided in the cabinet 8, and both ends of the partition plate 15 extend horizontally to the cabinet side plate, are fixed together with the cabinet front plate, and are spaced apart from the cabinet back plate. has been done. The partition plate 16 is
Although it has the same shape as the partition plate 15, it is fixed to the back plate and side plate of the cabinet 8 with a narrow gap from the partition plate 15, and is spaced apart from the front plate of the cabinet. A second port 12 is provided at the bottom of the partition plates 15 and 16, and the opening thereof is on the speaker mounting surface.

このように構成された本実施例のスピーカシス
テムについて、以下その動作を説明する。まず、
仕切板１５，１６によつてキヤビネツト８内の空
間は２つの小空間１３，１４に分割される。仕切
板１５，１６間の細隙は第１のポート１１を形成
している。従つて音響動作は、第１図及び第２図
に示す従来スピーカシステムと同様となり、低域
での能率向上が図れる。また、仕切板１５，１６
はキヤビネツト８に設けたスピーカ取付穴１０に
沿つた円弧状であるため、円弧の取り方により、
小空間１３，１４の大きさを低域能率の向上に有
利なW_B1≧W_B2とすることも容易に可能となる。 The operation of the speaker system of this embodiment configured as described above will be described below. first,
The space inside the cabinet 8 is divided into two small spaces 13 and 14 by partition plates 15 and 16. The gap between the partition plates 15 and 16 forms the first port 11. Therefore, the acoustic operation is similar to the conventional speaker system shown in FIGS. 1 and 2, and efficiency in the low range can be improved. In addition, partition plates 15, 16
is an arc shape along the speaker mounting hole 10 provided in the cabinet 8, so depending on how the arc is taken,
It is also possible to easily set the sizes of the small spaces 13 and 14 to W _B1 ≧W _B2 , which is advantageous for improving low frequency efficiency.

考案の効果以上説明したように本考案によれば、キヤビネ
ツト内を２つの円弧状の仕切板により分割するこ
とにより２つの小容積を構成し、さらに仕切板間
の細隙によりポートを構成するようにしたので、
従来構造のようにキヤビネツト内にさらに箱を設
けて小容積を形成する必要がなく、従来のスピー
カシステムと比べてキヤビネツトの構造が非常に
簡単となり、低コストで高性能なスピーカシステ
ムを実現することができる。Effects of the invention As explained above, according to the invention, the inside of the cabinet is divided by two arc-shaped partition plates to form two small volumes, and the gap between the partition plates forms a port. So,
Unlike the conventional structure, there is no need to create an additional box inside the cabinet to create a small volume, and the structure of the cabinet is much simpler than that of conventional speaker systems, realizing a low-cost, high-performance speaker system. I can do it.

[Brief explanation of the drawing]

第１図は従来のスピーカシステムの一部切欠斜
視図、第２図は同縦断側面図、第３図は同スピー
カシステムの音圧周波数特性の説明図、第４図は
本考案の一実施例におけるスピーカシステムの一
部切欠斜視図、第５図は同縦断側面図、第６図は
第５図における−線に沿う断面図である。８……キヤビネツト、９……スピーカ、１０…
…スピーカ取付穴、１１……第１のポート、１２
……第２のポート、１３，１４……小空間、１
５，１６……仕切板。 Fig. 1 is a partially cutaway perspective view of a conventional speaker system, Fig. 2 is a longitudinal side view of the same, Fig. 3 is an explanatory diagram of the sound pressure frequency characteristics of the same speaker system, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a longitudinal sectional side view of the speaker system, and FIG. 6 is a sectional view taken along the line - in FIG. 5. 8...cabinet, 9...speaker, 10...
...Speaker mounting hole, 11...First port, 12
...Second port, 13,14...Small space, 1
5, 16... Partition plate.

Claims

[Scope of utility model registration request]

It has an arc-shaped part that follows the speaker mounting hole formed in the cabinet, and a flat part that extends horizontally from both ends of this arc-shaped part to the cabinet side plate, and is fixed to the cabinet front plate with a space between it and the cabinet back plate. A first partition plate, which has the same shape as the first partition plate and is arranged with a narrow gap below the first partition plate, and is fixed to the cabinet back plate and side plate with a space between the cabinet front plate and the cabinet front plate. A speaker system comprising: a second partition plate, and one bass reflex port disposed in a space between the second partition plate and the bottom surface of the cabinet.