JPH044498U - - Google Patents

Info

Publication number
JPH044498U
JPH044498U JP4409090U JP4409090U JPH044498U JP H044498 U JPH044498 U JP H044498U JP 4409090 U JP4409090 U JP 4409090U JP 4409090 U JP4409090 U JP 4409090U JP H044498 U JPH044498 U JP H044498U
Authority
JP
Japan
Prior art keywords
magnetic circuit
plate
voice coil
pole piece
center
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4409090U
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP4409090U priority Critical patent/JPH044498U/ja
Publication of JPH044498U publication Critical patent/JPH044498U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Description

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

第１図はこの考案の音響拡大装置の一実施例を
示す垂直断面図、第２図は従来の音響拡大装置を
示す垂直断面図である。 なお図中１１は磁気回路、１２はポールピース
、１３はトツププレート、１４はマグネツト、１
５は貫通穴、１５ａは大径部、１６は振動プレー
ト、１７は弾性ダンパ、１９はボイスコイル、２
２は脱落防止部材、２２ａは拡大部である。 FIG. 1 is a vertical sectional view showing an embodiment of the sound amplifying device of this invention, and FIG. 2 is a vertical sectional view showing a conventional sound amplifying device. In the figure, 11 is a magnetic circuit, 12 is a pole piece, 13 is a top plate, 14 is a magnet, 1
5 is a through hole, 15a is a large diameter portion, 16 is a vibration plate, 17 is an elastic damper, 19 is a voice coil, 2
2 is a falling-off prevention member, and 22a is an enlarged portion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ポールピースとトツププレートおよびこれらに
挟着されたマグネツトから成り、その磁気空隙に
ボイスコイルを挿入させる磁気回路と、上記ボイ
スコイルによつて駆動され天井板等に重合させた
振動プレートとを弾性ダンパーを介して接着させ
たものにおいて、上記磁気回路と振動プレートと
の間にこの磁気回路のポールピースの中心部に開
設した貫通穴内に挿入され、先端が上記振動プレ
ートの中心ボス部に螺合されると共に、他端に上
記貫通穴の大径部内に位置させた拡大部を有する
上記磁気回路の脱落防止部材を設けたことを特徴
とする音響拡大装置。 An elastic damper consists of a pole piece, a top plate, and a magnet sandwiched between them, and a magnetic circuit that inserts a voice coil into the magnetic gap, and a vibration plate that is driven by the voice coil and superimposed on a ceiling plate, etc. In the magnetic circuit and the vibrating plate, the magnetic circuit is inserted into a through hole formed in the center of the pole piece of the magnetic circuit, and the tip is screwed into the center boss of the vibrating plate. A sound amplifying device characterized in that a falling-off prevention member for the magnetic circuit is provided at the other end thereof and has an enlarged portion located within the large diameter portion of the through hole.
JP4409090U 1990-04-26 1990-04-26 Pending JPH044498U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4409090U JPH044498U (en) 1990-04-26 1990-04-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4409090U JPH044498U (en) 1990-04-26 1990-04-26

Publications (1)

Publication Number Publication Date
JPH044498U true JPH044498U (en) 1992-01-16

Family

ID=31557082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4409090U Pending JPH044498U (en) 1990-04-26 1990-04-26

Country Status (1)

Country Link
JP (1) JPH044498U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635075A (en) * 1979-08-30 1981-04-07 Yokogawa Hokushin Electric Corp Echo system of ultrasonic wave pulse
JPS5760303U (en) * 1980-09-27 1982-04-09

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635075A (en) * 1979-08-30 1981-04-07 Yokogawa Hokushin Electric Corp Echo system of ultrasonic wave pulse
JPS5760303U (en) * 1980-09-27 1982-04-09

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