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在小型音响设备向小型、高性能发展的过程中,非常期望扬声器实现小型化。过去,扬声器的小型化是以牺牲它的性能来实现的。但是,此次,笔者通过下列方法,成功地研究出过去难以期待的超小型、超偏平和电声转换效率高的高性能微型扬声器。(1)扬声器的振膜采用高分子薄膜,同时通过研究这种薄膜的材料和形状,确立振膜成型技术。(2)研制新的音圈引线处理结构。(3)通过一点悬置方式使振动系统变薄,使质量减轻。(4)设计使用希土类钴磁体的高能量磁路。采用这种微型扬声器,就能够使袖珍式收音机和微型盒式录音机小型化,同时,能够开辟扬声器需要的新途径。
In small-sized, high-performance small audio equipment in the process of development, the speaker is expected to achieve miniaturization. In the past, speaker miniaturization was achieved at the expense of its performance. However, this time, the author succeeded in developing the ultra-small, ultra-flat, and high-performance miniature loudspeakers with high electroacoustic conversion efficiency that were previously unimaginable by the following methods. (1) The diaphragm of the loudspeaker is made of a polymer film, and the diaphragm forming technology is established by studying the material and the shape of the film. (2) Development of a new voice coil lead processing structure. (3) The vibration system is thinned by a little suspension, so that the quality is reduced. (4) Design a high-energy magnetic circuit using a rare-earth cobalt magnet. Using this miniature speaker, miniaturized pocket-sized radios and mini-cassette players can be miniaturized, while at the same time providing new avenues for loudspeakers.