JPS593698U

JPS593698U - electromagnetic speaker

Info

Publication number: JPS593698U
Application number: JP9843982U
Authority: JP
Inventors: 堀越　一郎
Original assignee: セイコーインスツルメンツ株式会社
Priority date: 1982-06-30
Filing date: 1982-06-30
Publication date: 1984-01-11

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 the drawing]

第１図はスピーカの従来例を示す断面図であり、第２図
は本考案に従うスピーカの断面図を示し１、第３図は第
２図の可動鉄片８と振動板体９で構成された振動板の復
元力及び永久磁石１２から可動鉄片８に加わる吸引力と
可動鉄片８と磁心１４との間隔との関係を示した図であ
り、第４図も本考案に従う一実施例を示す図である。、
　−１，８・・・可動鉄片、２，９・・・振動板体、３
゜１０・・・支持枠、４．１１・・・磁心体、５．１２
・・・永久磁石、６，１３・・・コイル、７．１４・・
・磁心、１５・・・スペーサ、１６・・・ガイド部、Ａ
・・・磁心１４の上面位置、Ｂ・・・スペーサ１５の上
面位置、Ｃ・・・振動板の復元力と永久磁石１２から可
動鉄片８への吸引力とが平衡したときの可動鉄片８の磁
心１４側の面の位置、Ｄ・・・永久磁石１２がない場合
の可動鉄片８の磁心１４側の面の位置、Ｅ・・・振動板
の間隔内の変位〜復元力特性、Ｆ・・・永久磁石１２の
間隔内の吸引力特性、Ｇ・・・永久磁石１２がない場合
の振動板の復元力と吸引力がＯめときを示すもの、Ｈ・
・・永久磁石１２がある場合の振動板の復元力と吸引力
とがつりあった点。FIG. 1 is a cross-sectional view showing a conventional example of a speaker, FIG. 2 is a cross-sectional view of a speaker according to the present invention, and FIG. 3 is a cross-sectional view of a speaker according to the present invention. FIG. 4 is a diagram showing the relationship between the restoring force of the diaphragm, the attractive force applied from the permanent magnet 12 to the movable iron piece 8, and the distance between the movable iron piece 8 and the magnetic core 14, and FIG. 4 also shows an embodiment according to the present invention. It is. ,
-1, 8... Movable iron piece, 2, 9... Vibration plate body, 3
゜10...Support frame, 4.11...Magnetic core, 5.12
...Permanent magnet, 6,13...Coil, 7.14...
・Magnetic core, 15... Spacer, 16... Guide part, A
... upper surface position of the magnetic core 14, B... upper surface position of the spacer 15, C... position of the movable iron piece 8 when the restoring force of the diaphragm and the attractive force from the permanent magnet 12 to the movable iron piece 8 are balanced. Position of the surface on the magnetic core 14 side, D... Position of the surface of the movable iron piece 8 on the magnetic core 14 side when there is no permanent magnet 12, E... Displacement within the interval of the diaphragm to restoring force characteristics, F...・Attraction force characteristics within the interval of the permanent magnets 12, G...A characteristic indicating when the restoring force and attraction force of the diaphragm are O when there is no permanent magnet 12, H.
...The point where the restoring force and attractive force of the diaphragm are balanced when the permanent magnet 12 is present.

Claims

[Scope of utility model registration request]

(1) A coil, a magnetic core, a permanent magnet, a magnetic core body to which the coil, the magnetic core, and the permanent magnet are fixed, and a movable iron piece made of a soft magnetic material placed opposite to the magnetic core at a distance, on the side of the magnetic core. An electromagnetic speaker comprising at least a diaphragm fixed to a position 1, and a support frame on which the periphery of the diaphragm is placed, wherein the diaphragm is mounted on the magnetic core, the coil, and the permanent magnet. An electromagnetic speaker characterized by having a spacer made of a non-magnetic and non-conductive material fixed to its side.

(2) The electromagnetic speaker according to claim 1, wherein the spacer is a plastic member.