JPS59106293U

JPS59106293U - speaker

Info

Publication number: JPS59106293U
Application number: JP20010382U
Authority: JP
Inventors: 幸夫松本
Original assignee: Pioneer Corp
Current assignee: Pioneer Corp
Priority date: 1982-12-29
Filing date: 1982-12-29
Publication date: 1984-07-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のスピーカの半断面図、第２図は本考案実
施例の要部半断面図、第３図乃至第６図は本考案の他の
実施例の要部断面図である。１２・・・マグネット、１３・・・バックプレート、１
４・・・センタポール、１５・・・トッププレート、１
６・・・立上片、１６ａ・・・折曲部、１６Ｃ・・・貫
通孔、１７・・・磁気ギャップ、２２・・・ボイスコイ
ル、２３・・・バックキャビティ。FIG. 1 is a half sectional view of a conventional speaker, FIG. 2 is a half sectional view of a main part of an embodiment of the present invention, and FIGS. 3 to 6 are sectional views of main parts of other embodiments of the present invention. 12...Magnet, 13...Back plate, 1
4... Center pole, 15... Top plate, 1
6... Standing piece, 16a... Bent part, 16C... Through hole, 17... Magnetic gap, 22... Voice coil, 23... Back cavity.

Claims

[Scope of utility model registration request]

A magnetic circuit includes a center pole, a magnet disposed outside the center pole, and a top plate and a back plate fixed to the upper and lower surfaces of the magnet, and the magnet and center pole are brought close to each other, and the upper surface of the top plate is provided with a rising piece projecting upward on the outside of the inner edge of the top plate, an inwardly bent part is formed at the tip of this rising piece, and a magnetic gap is created between the bent part and the center pole. Formation 1: A speaker in which a through hole is bored in the bent portion, and a space surrounded by the rising piece and the center pole forms a back cavity on the back side of the diaphragm fixed to the voice coil in the magnetic gap.