JPS62193394U

JPS62193394U -

Info

Publication number: JPS62193394U
Application number: JP8106886U
Authority: JP
Priority date: 1986-05-30
Filing date: 1986-05-30
Publication date: 1987-12-09

Description

[Brief explanation of drawings]

第１図乃至第７図は本考案に係る磁気回路構造
の実施例を示し、第１図は振動系を組み込んだ状
態を示す磁気回路構造の断面図、第２図は要部の
断面図、第３図乃至第６図はポール部本体と分割
部材との各種の嵌合形態を示す要部の断面図、第
７図はポール部外周に形成されるべき凹部の開口
縁にテーパーを設けた例を示す要部の断面図であ
る。第８図は従来の一般的なコーン型スピーカの
断面図である。１：磁気回路部、２：ヨーク、３：ポール部、
４：マグネツト、５：トツププレート、６：磁気
ギヤツプ、７：凹部、８：小径部、９ａ，９ｂ：
エツジ押え部材、１０：エツジ支持段部、１１：
ポール部本体、１２：奥壁、１３：分割部材、２
１：振動系、２２：コーン振動板部、２３：コイ
ルボビン部、２４：内周側エツジ部、２５：ボイ
スコイル。 1 to 7 show examples of the magnetic circuit structure according to the present invention, FIG. 1 is a sectional view of the magnetic circuit structure in which a vibration system is incorporated, FIG. 2 is a sectional view of the main parts, Figures 3 to 6 are cross-sectional views of essential parts showing various forms of fitting between the pole main body and the split member, and Figure 7 is a tapered opening edge of a recess to be formed on the outer periphery of the pole. FIG. 3 is a sectional view of a main part showing an example. FIG. 8 is a sectional view of a conventional general cone-shaped speaker. 1: Magnetic circuit section, 2: Yoke, 3: Pole section,
4: Magnet, 5: Top plate, 6: Magnetic gap, 7: Recessed part, 8: Small diameter part, 9a, 9b:
Edge holding member, 10: Edge support stepped portion, 11:
Pole body, 12: Back wall, 13: Divided member, 2
1: Vibration system, 22: Cone diaphragm section, 23: Coil bobbin section, 24: Inner peripheral edge section, 25: Voice coil.

Claims

[Claims for Utility Model Registration] 1. A magnetic circuit structure for incorporating a vibration system formed by integrally molding a cone diaphragm part, a coil bobbin part, and an inner circumferential edge part extending horizontally from the lower end of the cone diaphragm part toward the center. In order to support the edge part, the yoke pole part is composed of a pole part body and a split member that can be fitted into the pole part body, and an edge support stepped part is formed on the upper outer periphery of the pole part body. A recess is formed on the outer periphery of the pole by fitting the divided members,
A magnetic circuit structure characterized in that the edge portion is held by an edge pressing member made of an elastic material disposed in the recess. 2. The magnetic circuit structure according to claim 1, wherein the divided member is ring-shaped and is fitted into a small diameter portion formed at the upper part of the pole main body. 3. A fitting protrusion is formed on one of the pole main body and the dividing member, and a fitting recess is formed on the other in correspondence with the fitting protrusion, so that the two are fitted. A magnetic circuit structure according to claim 1 of the utility model registration claim. 4. The magnetic circuit structure according to claim 1, wherein the opening edge of the recess formed on the outer periphery of the pole portion is tapered.