JPH0344996U

JPH0344996U -

Info

Publication number: JPH0344996U
Application number: JP10391689U
Authority: JP
Priority date: 1989-09-06
Filing date: 1989-09-06
Publication date: 1991-04-25

Description

[Brief explanation of drawings]

第１図乃至第６図は本考案に係るスピーカ用振
動板の実施例を示し、第１図は平面図、第２図Ａ
，Ｂは断面図であつて、Ａはレジスト除去前の断
面図、第３図はレジスト除去後の断面図、第３図
及び第４図はマスキングパターンの他の例を示す
平面図であり、第３図Ａ，Ｂは同心円状の他の例
、第４図Ａ，Ｂは放射状の例、第５図Ａは不整形
の例を示す平面図、第５図Ｂは文字パターンとし
た例を示す平面図である。第６図は陽極酸化処理
装置の概略図である。第７図は従来の酸化皮膜を
形成したスピーカ用振動板を示す断面図である。Ａ……スピーカ用振動板、１……振動板基材、
２……酸化皮膜、１Ａ……非生成部、２Ａ……酸
化皮膜生成部、３……レジスト。 1 to 6 show examples of the speaker diaphragm according to the present invention, FIG. 1 is a plan view, and FIG.
, B are cross-sectional views, A is a cross-sectional view before removing the resist, FIG. 3 is a cross-sectional view after removing the resist, and FIGS. 3 and 4 are plan views showing other examples of masking patterns. Figures 3A and B are other examples of concentric circles, Figures 4A and B are radial examples, Figure 5A is a plan view of an irregularly shaped example, and Figure 5B is an example of character patterns. FIG. FIG. 6 is a schematic diagram of the anodizing treatment apparatus. FIG. 7 is a sectional view showing a speaker diaphragm on which a conventional oxide film is formed. A...Speaker diaphragm, 1...Diaphragm base material,
2... Oxide film, 1A... Non-forming area, 2A... Oxide film forming area, 3... Resist.

Claims

[Scope of Claim for Utility Model Registration] 1. In a speaker diaphragm in which an oxide film is formed on the surface of a metal diaphragm base material such as aluminum or titanium by an anodizing process, at least one side of the diaphragm base material A vibration for a speaker, characterized in that an oxide film is partially generated on the surface of a diaphragm base material by masking and anodizing treatment, and an oxide film-forming part and a non-forming part are formed on the diaphragm base material. Board. 2. The speaker diaphragm according to claim 1, wherein the oxide film is formed to a thickness of 200 to 2000 A, and the oxide film forming portion is colored in a color corresponding to the film thickness. 3. The speaker according to claim 1, wherein the speaker is configured to reduce high-frequency resonance of the diaphragm by creating an oxide film with a thickness of 1 micron or more to create a sound velocity difference between the oxide film-forming part and the non-oxide film-forming part. diaphragm for use. 4. The speaker diaphragm according to claim 1, wherein the pattern of the non-generating portion has a character shape.