JPS58129796U - Electromagnetic buzzer - Google Patents

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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来構成を示す断面図、第２図は本考案による
構成を示す断面図、第３図は永久磁石の磁極を示す平面
図、である。 １１・・・・・・ブザーケース、１２・・・・・・ヨー
ク、１３・・・・・・振動板、１４・・・・・・永久磁
石、１５・・・・・・鉄心、１６・・・・・・コイル。FIG. 1 is a sectional view showing a conventional structure, FIG. 2 is a sectional view showing a structure according to the present invention, and FIG. 3 is a plan view showing the magnetic poles of a permanent magnet. 11... Buzzer case, 12... Yoke, 13... Vibration plate, 14... Permanent magnet, 15... Iron core, 16... ·····coil.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 振動板、鉄心、コイル、永久磁石およびヨークとを有す
る電磁式ブザーにおいて、コイルの外側に位置するドー
ナツ形の永久磁石がその内周面と外周面とが異極になる
ように着磁され、上記永久・磁石の外周面に両端開口あ
円筒状ヨークが配置されていることを特徴とする電磁式
ブザー。In an electromagnetic buzzer having a diaphragm, an iron core, a coil, a permanent magnet, and a yoke, a donut-shaped permanent magnet located outside the coil is magnetized so that its inner peripheral surface and outer peripheral surface have different polarities, An electromagnetic buzzer characterized in that a cylindrical yoke with openings at both ends is arranged on the outer peripheral surface of the permanent magnet.