JPH0437297A

JPH0437297A - Speaker

Info

Publication number: JPH0437297A
Application number: JP2141323A
Authority: JP
Inventors: Yoshitomo Honda; 本田　吉朋
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1990-06-01
Filing date: 1990-06-01
Publication date: 1992-02-07

Abstract

PURPOSE:To realize a speaker unit with light weight, high rigidity, high heat conductivity, large vibration proof effect and high quality by employing a vibration proof aluminum alloy as a material of a decoration ring of a speaker. CONSTITUTION:Decoration rings 4, 5 mounted to a front face of a peripheral ridge of speaker units 2, 3 are made of a vibration proof aluminum alloy. Moreover, a diaphragm 6 of the speaker unit 2 is supported at the inner periphery and a frame 7 with the decoration ring 4 arranged thereto is provided to the front face. Thus, while keeping the light weight and rigidity of the decoration rings 4, 5 themselves, the internal loss is increased and radiation due to undesired vibration is suppressed, large heat conductivity is obtained and acoustic performance is improved. Thus, a speaker with excellent performance and job performance is realized.

Description

【発明の詳細な説明】［産業上の利用分野］この発明はスピーカーユニットの振動板を支持するフレ
ーム前面に装飾用リング状体を配設したスピーカーに関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker in which a decorative ring-shaped body is provided on the front surface of a frame that supports a diaphragm of a speaker unit.

［従来の技術］スピーカーユニットの振動板を支持するフレームのフラ
ンジ部前面に装飾用リング状体を配設することは一般に
行なわれていた。この装飾用リング状体には、通常、ア
ルミニウム等の比較的軽量かつ剛性の高い内部損失の少
ない金属や、ＡＢＳなどのプラスチック樹脂が用いられ
ている。[Prior Art] It has been common practice to arrange a decorative ring-shaped body on the front surface of a flange portion of a frame that supports a diaphragm of a speaker unit. This decorative ring-shaped body is usually made of a metal such as aluminum that is relatively lightweight, has high rigidity, and has low internal loss, or a plastic resin such as ABS.

「発明が解決しようとする課題］従来のスピーカーは以上のように装飾用リング状体が、
内部損失の少ない金属やＡＢＳなどのプラスチック樹脂
で構成されているので、振動板の振動により装飾用リン
グ状体自体による共振が起こりやすく異音や不要振動を
生じ、スピーカーの音響特性に大きな悪影響をおよぼし
、音質が劣化するなどの問題点があった。“Problem to be solved by the invention” As described above, in the conventional speaker, the decorative ring-shaped body is
Since it is made of metal with low internal loss and plastic resin such as ABS, the vibration of the diaphragm tends to cause the decorative ring itself to resonate, producing abnormal noise and unnecessary vibration, which has a large negative impact on the acoustic characteristics of the speaker. However, there were problems such as deterioration of the sound quality.

また、装飾用リング状体の不要振動を抑えるには固定方
法を強固にしたり、肉厚を大にすることが考えられるが
、そうすることにより機械的強度は増しても、それの大
型重量化が進み、作業性の悪化及び取り付は相手部品の
強度を増加させる必要性から、コストアンプを招くとい
う問題点が生ずる。In addition, in order to suppress unnecessary vibrations of the decorative ring-shaped body, it is possible to strengthen the fixing method or increase the wall thickness, but although this increases the mechanical strength, it also increases the size and weight of the ring-shaped body. This leads to problems such as deterioration of workability and the need to increase the strength of the mating component during installation, leading to increased costs.

この発明は上記のような問題点を解消するためになされ
たもので、軽量で剛性、熱伝導度が大きく、かつ、内部
損失の大きい装飾用リング状体をもった、性能が優れ作
業性も従来と変わらない高品質なスピーカーを得ること
を目的としている。This invention was made to solve the above-mentioned problems, and it has a decorative ring-shaped body that is lightweight, rigid, and has high thermal conductivity, and has a large internal loss, and has excellent performance and workability. The aim is to obtain speakers of the same high quality as before.

［課題を解決するための手段］この発明に係るスピーカーは、装飾用リング状体を構成
する材料として防振性アルミニウム合金を用いたもので
ある。[Means for Solving the Problems] A speaker according to the present invention uses a vibration-proof aluminum alloy as a material constituting a decorative ring-shaped body.

［作　用］この発明におけるスピーカーは、装飾用リング状体を防
振性アルミニウム合金よりなる材料で構成したので、装
飾用リング状体自体の軽量剛性は維持されながら内部損
失が増大し、それの不要振動による輻射が抑えられると
ともに大きい熱伝導度が得られ、音響性能が向上する。[Function] In the speaker according to the present invention, the decorative ring-shaped body is made of a material made of vibration-proof aluminum alloy, so while the lightweight rigidity of the decorative ring-shaped body itself is maintained, internal loss increases, and its internal loss increases. Radiation due to unnecessary vibrations is suppressed, high thermal conductivity is obtained, and acoustic performance is improved.

口実施例コ以下、この発明の一実施例を図について説明する。第１
図はこの発明の一実施例を示す正面図、第２図はこの実
施例のスピーカーユニット部を示す正面図、第３図は第
２図■−■部拡大断面図である。図において、（１）は
スピーカーキャビネット、（２）はキャビネット（１）
に装着された低音用スピーカーユニット（ウーファ−）
、（３）は高音用スピーカーユニット（トウイータ−）
、（４）　、　（５）はスピーカーユニット（２）　、
　（３）の周縁部前面に装着された装飾用リング状体で
、防振性アルミニウム合金（Ａｌ−Ｎｉ系合金又はＡｌ
−Ｓｉ系合金）により構成されている。（６）はスピー
カーユニット（２）の振動板、（７）は振動板（６）を
内周で支持するとともに前面に装飾用リング状体（４）
を固着配設したフレームである。Embodiment One embodiment of the present invention will be described below with reference to the drawings. 1st
2 is a front view showing an embodiment of the present invention, FIG. 2 is a front view showing a speaker unit portion of this embodiment, and FIG. 3 is an enlarged sectional view taken along line 2--2 in FIG. In the figure, (1) is the speaker cabinet, (2) is the cabinet (1)
Bass speaker unit (woofer) attached to
, (3) is a treble speaker unit (tweeter)
, (4), (5) are speaker units (2),
(3) A decorative ring-shaped body attached to the front side of the peripheral edge of the vibration-proof aluminum alloy (Al-Ni alloy or Al
-Si-based alloy). (6) is the diaphragm of the speaker unit (2), (7) is the diaphragm that supports the diaphragm (6) on the inner periphery, and has a decorative ring-shaped body (4) on the front.
It is a frame with fixedly arranged.

次にこの防振性アルミニウム合金の各組成例を示す。Next, examples of each composition of this anti-vibration aluminum alloy will be shown.

組成例ｌＮｉ−６％、Ｆｅ−０，０５％、Ｚｒ−０，０５％、Ｍ
Ｍ車−０，１％、Ａ１−残部。ここにＭＭ本はミツシュ
メタルで、その組成はＬ　ａ　−３５％、Ｃｅ−４３％
、Ｎａ−１５％、Ｐ　ｒ　−４％、Ｓｍ−１％、Ｙその
他２％である。Composition example l Ni-6%, Fe-0.05%, Zr-0.05%, M
M car - 0.1%, A1 - remainder. The MM book here is Mitsushmetal, its composition is La -35%, Ce-43%
, Na-15%, Pr-4%, Sm-1%, Y and others 2%.

組成例２Ｎｉ−６％、Ｆｅ−０，０５％、Ｚｒ−０，０５％、　
　ＭＭ本−０，１％、　５ｎ−０，０８％、　Ａ１−残
部。Composition Example 2 Ni-6%, Fe-0.05%, Zr-0.05%,
MM book - 0.1%, 5n - 0.08%, A1 - remainder.

組成例３Ｓｉ−１０％、Ｆｅ−０，０５％、Ｚｒ−０，０５％、
ＭＭ本−０，１％、　Ｎ　ａ　−０、ＯＯ２％。Composition Example 3 Si-10%, Fe-0.05%, Zr-0.05%,
MM book -0.1%, Na -0, OO2%.

Ａ１−残部。A1-Remainder.

組成例４Ｓｉ−１０％、Ｆｅ−０，０５％、Ｚｒ−０，０５％、
　ＭＭ＄−０，１％、　Ｓ　ｎ　−０，０８％、　Ａ１
−残部。Composition Example 4 Si-10%, Fe-0.05%, Zr-0.05%,
MM$-0.1%, Sn-0.08%, A1
-Remainder.

組成例１及び２はＡｌ−Ｎｉ系合金、組成例３及び４は
Ａｌ−Ｓｉ系合金である。Composition Examples 1 and 2 are Al-Ni alloys, and Composition Examples 3 and 4 are Al-Si alloys.

一般にアルミニウム合金の中で内部摩擦（減衰）を生ず
るメカニズムとして第２相粒マトリックスの境界、結晶
粒界及び粒界での粘性流動並びに転位、空孔及び積層欠
陥等の結晶中の微小欠陥による振動エネルギーの吸収が
考えられる。減衰能Ｑ−’は、外部がら与えられた振動
エネルギーを熱エネルギーに変換する尺度を示す。In general, the mechanisms that cause internal friction (damping) in aluminum alloys include viscous flow at the boundaries of the second phase grain matrix, grain boundaries, and grain boundaries, and vibrations caused by micro defects in crystals such as dislocations, vacancies, and stacking faults. Energy absorption is considered. The damping capacity Q-' indicates a measure of converting externally applied vibrational energy into thermal energy.

２π　　　Ｅここで、Ｅは振動の１サイクルの最初において振動系の
有する振動エネルギー、ΔＥは振動の１サイクル中に熱
エネルギーに変換する振動エネルギーである。2π E Here, E is the vibrational energy that the vibration system has at the beginning of one cycle of vibration, and ΔE is the vibrational energy that is converted into thermal energy during one cycle of vibration.

この実施例におけるＡｌ−Ｎｉ系合金は、アルミニウム
Ａｌ中にニッケルＮｉが添加されるので、マトリックス
であるＡｌ中にＮｉ粒子が析出され、共晶結晶が形成さ
れ、そしてこの第２相であるＮｉ粒子の界面によって振
動が吸収され、減衰能Ｑ−’が向上する。In the Al-Ni alloy in this example, nickel Ni is added to aluminum Al, so Ni particles are precipitated in the matrix Al, forming a eutectic crystal, and this second phase Ni Vibration is absorbed by the particle interface, and the damping ability Q-' is improved.

Ｆｅ、Ｚ　ｒ、Ｖ、Ｔｉ及び希土類元素は、結晶を微細
化して粒界を増加させる働きが、Ｎａ、Ｓｒは、Ｎｉ粒
子を微細化する働きがある。又、上記組成例２のように
Ｓｎを含有すると、これが結晶粒界に微細に析出され、
粒界の粘性が増大し減衰能Ｑ−’がさらに向上する。Fe, Zr, V, Ti, and rare earth elements have the function of refining crystals and increasing grain boundaries, and Na and Sr have the function of refining Ni particles. In addition, when Sn is contained as in Composition Example 2 above, it is finely precipitated at the grain boundaries,
The viscosity of the grain boundaries increases and the damping ability Q-' further improves.

上記各組成例１及び２の重量百分率は単なる一例で１次
に示す範囲内であればよく、それより多くても少なくて
も以下の様な問題が生ずる。The weight percentages of each of Composition Examples 1 and 2 above are merely examples, and may be within the range shown below; if the weight percentage is greater or less than that, the following problems will occur.

［１］Ｎｉ４〜１０％、より好ましくは４．５〜８％で
、４％以下であると形成される粒子が少ないため充分な
減衰能が得られず、１０５以上であると粗大な粒子生成
のため減衰能が向上せず、機械的性質が劣化する。[1] Ni is 4 to 10%, more preferably 4.5 to 8%. If it is less than 4%, few particles will be formed and sufficient damping ability will not be obtained, and if it is more than 105, coarse particles will be formed. Therefore, the damping capacity does not improve and the mechanical properties deteriorate.

［２］（ｉ）Ｆｅ、Ｚｒ、Ｖ及びＴｉからなる群がら選
ばれた少なくとも１種の元素が合計で０．０５〜０．８
％、より好まＬ＜はｏ、０６〜０．６％で、０．０５以
下であると結晶の微細化効果が充分でなく、Ｏ，Ｓ％以
上であると粗大な金属化合物が生成して減衰能及び機械
的性質が損なう。[2] (i) At least one element selected from the group consisting of Fe, Zr, V and Ti is 0.05 to 0.8 in total
%, more preferably L< is o, 06 to 0.6%; if it is less than 0.05, the crystal refinement effect will not be sufficient, and if it is more than O,S%, coarse metal compounds will be formed. Damping capacity and mechanical properties are impaired.

（ｉｉ）希土類元素の少なくとも１種が合計で０．０５
〜２％、より好ましくは０　、０６〜’ｒ　、　５％で
、０．０５以下であると結晶の微細化効果が充分でなく
、２％以上であると粗大な金属化合物が生成して減衰能
及び機械的性質が損なう。(ii) At least one kind of rare earth element is 0.05 in total
~2%, more preferably 0,06~'r,5%; if it is less than 0.05, the crystal refinement effect will not be sufficient, and if it is more than 2%, coarse metal compounds will be formed and attenuation will occur. performance and mechanical properties are impaired.

■Ｓｎが０．００５〜０．１％、より好ましくは０．０
０８〜ｏ、０８％で、０．００５％以下であると粒界の
粘性を増大させるのに充分でなく、０．１％以上である
と、ミクロ偏析が増大し、減衰能が改善されないうえに
、機械的性質及び耐蝕性が劣化する。■Sn is 0.005 to 0.1%, more preferably 0.0
08~o, 08%, if it is less than 0.005%, it is not sufficient to increase the viscosity of grain boundaries, and if it is more than 0.1%, microsegregation will increase, and the damping ability will not be improved. In addition, mechanical properties and corrosion resistance deteriorate.

また、この実施例のＡｌ−Ｎｉ系合金においては、その
結晶組織について、第２相粒子（Ｎｉ粒子）の平均粒子
径が１０μｍ以下であることが必要であり、１０μ鳳以
下とすることによって第２相粒子の界面を増大させ、大
きい減衰能を得ることができる。上記平均粒子径が７μ
鳳以下であることがより好ましく、５μｍ以下であるこ
とがさらに好ましい。In addition, in the Al-Ni alloy of this example, regarding its crystal structure, it is necessary that the average particle diameter of the second phase particles (Ni particles) is 10 μm or less, and by setting it to 10 μm or less, By increasing the interface between two-phase particles, it is possible to obtain a large damping capacity. The above average particle diameter is 7μ
It is more preferable that it is less than or equal to 0.5 μm, and even more preferably that it is less than or equal to 5 μm.

さらに、この実施例におけるＡｌ−Ｓｉ系合金は、アル
ミニウムＡｌ中にシリコンＳｉが添加されるので、マト
リックスであるＡｌ中にＳｉ粒子が析出され、共晶結晶
が形成され、そしてこの第２相であるＳｉ粒子の界面に
よって振動が吸収され、減衰能Ｑ−’が向上する。Furthermore, in the Al-Si alloy in this example, silicon Si is added to the aluminum Al, so Si particles are precipitated in the Al matrix, a eutectic crystal is formed, and this second phase Vibration is absorbed by the interface of a certain Si particle, and the damping ability Q-' is improved.

Ｆｅ、Ｚｒ、Ｖ、Ｔｉ及び希土類元素は、結晶を微細化
して粒界を増加させる働きが、Ｎａ−８ｒは、Ｓｉ粒子
を微細化する働きがある。又、上記組成例４のようにＳ
ｎを含有すると、これが結晶粒界に微細に析出され、粒
界の粘性が増大し減衰能Ｑ−’がさらに向上する。Fe, Zr, V, Ti, and rare earth elements have the function of refining crystals and increasing grain boundaries, and Na-8r has the function of refining Si particles. Also, as in composition example 4 above, S
When n is contained, it is finely precipitated at the grain boundaries, increasing the viscosity of the grain boundaries and further improving the damping ability Q-'.

上記各組成例３及び４の重量百分率は単なる一例で、次
に示す範囲内であればよく、それより多くても少なくて
も以下の様な問題が生ずる。The weight percentages in each of Composition Examples 3 and 4 above are merely examples, and may be within the ranges shown below.If the weight percentages are greater or less than that, the following problems will occur.

［１］Ｓｉ８〜２０％、より好ましくは９〜１８％で、
８％以下であると形成される粒子が少ないため充分な減
衰能が得られず、２０％以上であると粗大な粒子生成の
ため減衰能が向上しない。[1] Si 8 to 20%, more preferably 9 to 18%,
If it is 8% or less, sufficient damping capacity cannot be obtained because few particles are formed, and if it is 20% or more, coarse particles are formed and the damping capacity cannot be improved.

［２］（ｉ）Ｆｅ、Ｚｒ、Ｖ及びＴｉからなる群から選
ばれた少なくとも１種の元素が合計で０．０５〜０．８
％、より好ましくは０゜０６〜０．６％で、０．０５以
下であると結晶の微細化効果が充分でなく、０．８％以
上であると粗大な金属化合物が生成して減衰能及び機械
的性質が損なう。[2] (i) At least one element selected from the group consisting of Fe, Zr, V and Ti is 0.05 to 0.8 in total
%, more preferably 0.06 to 0.6%; if it is less than 0.05, the crystal refinement effect will not be sufficient, and if it is more than 0.8%, coarse metal compounds will be formed and the damping ability will be impaired. and mechanical properties are impaired.

（ｉｉ）希土類元素の少なくとも１種が合計でｏ、０５
〜２％、より好ましくは０．０６〜１．５％で、０．０
５以下であると結晶の微細化効果が充分でなく、２％以
上であると粗大な金属化合物が生成して減衰能及び機械
的性質が損なう。(ii) At least one rare earth element has a total of o, 05
~2%, more preferably 0.06-1.5%, 0.0
If it is less than 5, the crystal refinement effect will not be sufficient, and if it is more than 2%, coarse metal compounds will be formed, impairing damping ability and mechanical properties.

［３］Ｎａ及び又はＳｒを合計で０．１％以下、より好
ましくは０．０５％以下で、０．１％以上であると微細
化効果が認められなく鋳造性が損なわれる。[3] The total content of Na and/or Sr is 0.1% or less, more preferably 0.05% or less; if it is 0.1% or more, no refinement effect is observed and castability is impaired.

■Ｓｎが０．００５〜０．１％、より好ましくは０．０
０８〜０．０８％で、０．００５％以下であると粒界の
粘性を増大させるのに充分でなく、０．１％以上である
と、ミクロ偏析が増大し、減衰能が改善されないうえに
、機械的性質及び１ｌｉＦＪ蝕性が劣化する。■Sn is 0.005 to 0.1%, more preferably 0.0
If it is less than 0.005%, it is not sufficient to increase the viscosity of grain boundaries, and if it is more than 0.1%, microsegregation increases and the damping ability is not improved. In addition, mechanical properties and 1liFJ corrosion resistance deteriorate.

また、この実施例のＡｌ−Ｓｉ系合金においては、その
結晶組織について、第２相粒子（Ｓｉ粒子）の平均粒子
径が１０μ璽以下であることが必要であり、１０μｍ以
下とすることによって第２相粒子の界面を増大させ、大
きい減衰能を得ることができる。上記平均粒子径が７μ
ｍ以下であることがより好ましく、５μ−以下であるこ
とがさらに好ましい。In addition, in the Al-Si alloy of this example, regarding its crystal structure, it is necessary that the average particle diameter of the second phase particles (Si particles) is 10 μm or less, and by setting it to 10 μm or less, By increasing the interface between two-phase particles, it is possible to obtain a large damping capacity. The above average particle diameter is 7μ
It is more preferable that it is less than m, and even more preferably that it is less than 5μ.

次に下表にてこの発明の実施例のＡ　ｌ　−Ｎ　ｉ系合
金、Ａｌ−Ｓｉ系合金、Ａ　ｌ　（９９，５％）及びＺ
ｎ−Ａ′１系合金（商品名：コスマール２）の各特性を
比較して示す。Next, the table below shows the Al-Ni alloy, Al-Si alloy, Al (99.5%) and Z
The characteristics of the n-A'1 alloy (trade name: Cosmar 2) will be compared and shown.

上記表からも明らかなように、熱伝導度は普通純度アル
ミにラムＡ　ｌ　（９９，５％）より優れ、減衰能Ｑ−
’は本実施例のＡｌ−Ｓｉ系合金、Ａｌ−Ｎｊ系合金と
もに、Ａ　ｌ　（９９，５％）と比較して１桁大きく、
また１弾性率及び密度はほぼ同じ範囲であるので、軽量
剛性を落とすことなく、熱伝導度及び内部損失を従来構
成より、著しく向上させることができ、装飾用リング状
体の材料として、きわめて良好であることがわかる。ま
た最近では、Ｚｎ−Ａｌ系合金（商品名：コスマールＺ
）が注目されているが、本実施例のＡｌ−Ｎｉ系合金、
Ａｌ−Ｓｉ系合金に比べ、熱伝導度、減衰能及び伝播速
度に比例する比弾性率において劣り、さらに、密度が２
倍近くもあり軽量化に適するものではなく、そのうえ耐
蝕性においても問題がある。As is clear from the above table, the thermal conductivity is superior to ordinary purity aluminum (99.5%), and the damping capacity Q-
' is one order of magnitude larger than Al (99.5%) for both the Al-Si alloy and the Al-Nj alloy of this example,
In addition, since the elastic modulus and density are in almost the same range, thermal conductivity and internal loss can be significantly improved compared to conventional structures without reducing light weight and rigidity, making it extremely suitable as a material for decorative ring-shaped bodies. It can be seen that it is. Recently, Zn-Al alloy (product name: Cosmar Z
) has been attracting attention, but the Al-Ni alloy of this example,
Compared to Al-Si alloys, it is inferior in thermal conductivity, damping capacity, and specific modulus proportional to propagation velocity, and has a density of 2.
It is nearly twice as large, so it is not suitable for weight reduction, and there are also problems with corrosion resistance.

なお、上記実施例では第１図のスピーカーユニット（２
）の装−動用リング状体（４）について述べたが。In the above embodiment, the speaker unit (2) shown in FIG.
) has been described about the mounting ring-shaped body (4).

高音用スピーカーユニット（３）の装飾用リング状体（
５）や、他の構成のスピーカーユニットの装飾用リング
状体に適用しても同様の効果を得ることができる。Decorative ring-shaped body of treble speaker unit (3) (
5) or a decorative ring-shaped body of a speaker unit having another configuration, the same effect can be obtained.

［発明の効果］以上のように、この発明によればスピーカーの装飾用リ
ング状体の材料として防振性アルミニウム合金を用いた
ので、軽量で剛性が高く高熱伝導度で、さらに防振効果
を大にすることができ、不要輻射が少なく、磁気回路で
発生した熱エネルギーが効果的に放熱できる、品質の高
いスピーカーユニットが従来同様の作業性の良好な工程
で安価に得られる効果がある。[Effects of the Invention] As described above, according to the present invention, since a vibration-proof aluminum alloy is used as the material for the decorative ring-shaped body of the speaker, it is lightweight, has high rigidity, has high thermal conductivity, and has a further vibration-proofing effect. This has the effect that a high-quality speaker unit that can be made larger in size, has less unnecessary radiation, and can effectively dissipate the thermal energy generated in the magnetic circuit can be obtained at a low cost using the same easy-to-work process as before.

[Brief explanation of the drawing]

第１図はこの発明の一実施例を示す正面図、第２図はこ
の実施例のスピーカーユニット部を示す正面図、第３図
は第２図■−■部拡大断面図である。図において、（１）はスピーカーキャビネット、（２）
　、　（３）はスピーカーユニット、（４）、（５）は
装飾用リング状体、（６）は振動板、（７）はフレーム
である。図中同一符号は同一あるいは相当部分を示す。１ニスビーカーキヤビネツト４．５：装飾用リング状体FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a front view showing a speaker unit portion of this embodiment, and FIG. 3 is an enlarged sectional view taken along line 2--2 in FIG. In the figure, (1) is a speaker cabinet, (2)
, (3) is a speaker unit, (4) and (5) are decorative ring-shaped bodies, (6) is a diaphragm, and (7) is a frame. The same reference numerals in the figures indicate the same or corresponding parts. 1 Varnish beaker cabinet 4.5: Decorative ring-shaped body

Claims

[Claims]

(1) A speaker in which a decorative ring-shaped body is disposed on the front surface of a frame that supports a diaphragm of a speaker unit, characterized in that a vibration-proof aluminum alloy is used as a material constituting the ring-shaped body.

(2) The above-mentioned anti-vibration aluminum alloy contains a total of 0% of at least one element selected from the group consisting of [1] Ni4 to 10% [2] (i) Fe, Zr, V, and Ti. .05-0.8
%, and or (ii) at least one rare earth element in total of 0.05
~2%, the remainder consists of aluminum and impurities, and the average particle diameter of the Ni particles is 10 μm or less
The speaker according to claim 1, characterized in that the speaker uses a base alloy.

(3) The above-mentioned anti-vibration aluminum alloy contains a total of 0% of at least one element selected from the group consisting of [1] Ni4 to 10% [2] (i) Fe, Zr, V, and Ti. .05-0.8
%, and or (ii) at least one rare earth element in total of 0.05
~2% [3] Al-Ni containing 0.005~0.1% Sn, the balance consisting of aluminum and impurities, and the average particle size of the Ni particles is 10 μm or less
The speaker according to claim 1, characterized in that the speaker uses a base alloy.

(4) The above-mentioned anti-vibration aluminum alloy contains a total of 0% of at least one element selected from the group consisting of [1] Si8-20% [2] (i) Fe, Zr, V and Ti. .05-0.8
%, and or (ii) at least one rare earth element in total of 0.05
~2% [3] Contains 0.1% or less of Na and or Sr in total,
2. The speaker according to claim 1, wherein the speaker uses an Al-Si alloy in which the remainder consists of aluminum and impurities, and the average particle size of the Si particles is 10 μm or less.

(5) The above-mentioned anti-vibration aluminum alloy contains a total of 0% of at least one element selected from the group consisting of [1] Si8-20% [2] (i) Fe, Zr, V and Ti. .05-0.8
%, and or (ii) at least one rare earth element in total of 0.05
~2% [3] Na and/or Sr total 0.1% or less [4] S
Al-Si containing 0.005 to 0.1% n, the remainder consisting of aluminum and impurities, and the average particle diameter of the Si particles is 10 μm or less
The speaker according to claim 1, characterized in that the speaker uses a base alloy.