Speaker

Abstract

Abstract PURPOSE:To improve the efficiency of speaker (increase in sound pressure because of improved magnetic flux density) and to attain stable adhesion and rationalization, by applying a fast-curing single liquid adhesive excellent in physical and chemical strength to the adhesion between a magnet and a plate for sepaker field. CONSTITUTION:The magnet and the plate constituting the magnetic field are adhered by using the adhesives taking a composition comprising at least one kind of 1,1-di-substitution diene represented in a 2-cyanoacrylic ester or a 2- cyanoacylic ester and Structual Formula as the major component. In Formula, R1 is alkyl group, allyl group, aralkyl group or halogen having 1-5 hydrogen and carbon atoms, R2 is alkyl group having 1-5 hydrogen or carbon atoms, R3 is alkyl group having 1-5 hydrogen or carbon atoms, and X and Y are the same or different and selected from cyano group, carboxylic ester group, ethylsulfonic group, phenylsulfonic group, formyl group, acetyl group, benzoyl group, diethylphosphonyl group, amide group and phenyl group.

Inventors

• 👤 Yasuzo Masanobu
• 👤 正延　靖三
• 👤 Noboru Koizumi
• 👤 小泉　登
• 👤 Tadashi Akiyama
• 👤 忠司 秋山
• 👤 Kazuro Okuzawa
• 👤 和朗 奥沢
• 👤 Ryuichi Takaishi
• 👤 高石　隆一
• 👤 Masahiro Shinkai
• 👤 新海　正浩
• 👤 Keikichi Yanagii
• 👤 楊井　啓吉
• 👤 Toshio Teramoto
• 👤 俊夫 寺本

Bibliographic Details