JP3966106B2 - Thin speaker - Google Patents

Thin speaker Download PDF

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Publication number
JP3966106B2
JP3966106B2 JP2002208400A JP2002208400A JP3966106B2 JP 3966106 B2 JP3966106 B2 JP 3966106B2 JP 2002208400 A JP2002208400 A JP 2002208400A JP 2002208400 A JP2002208400 A JP 2002208400A JP 3966106 B2 JP3966106 B2 JP 3966106B2
Authority
JP
Japan
Prior art keywords
diaphragm
voice coil
magnetic circuit
speaker
recessed
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.)
Expired - Fee Related
Application number
JP2002208400A
Other languages
Japanese (ja)
Other versions
JP2004056278A (en
Inventor
智康 高瀬
昌英 隅山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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 by Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP2002208400A priority Critical patent/JP3966106B2/en
Publication of JP2004056278A publication Critical patent/JP2004056278A/en
Application granted granted Critical
Publication of JP3966106B2 publication Critical patent/JP3966106B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は各種音響機器および情報通信機器に使用されるスピーカに関するものである。
【0002】
【従来の技術】
従来のスピーカについて図3により説明する。
【0003】
図3は従来のスピーカの断面図を示したものである。
【0004】
図3に示すごとく着磁されたマグネット1を上部プレート2およびヨーク3により挟み込んで磁気回路4を構成していた。この磁気回路4のヨーク3にフレーム6を結合し、このフレーム6の周縁部に略ドーム形状のダイアフラム7を接着していた。そして、このダイアフラム7に結合されたボイスコイル8を、上記磁気回路4の磁気ギャップ5にはまり込むように結合していた。
【0005】
【発明が解決しようとする課題】
上述のスピーカは、薄型化を図るために、ダイアフラム7も平面的なものとしているが、ダイアフラム7を平面的にするとボイスコイル8との結合部はT字型となり、こうなるとボイスコイル8の振動伝達が悪くなり、高域の音圧レベルが低下したり、高域限界周波数が伸びず再生帯域が狭くなるという課題を有していた。
【0006】
本発明は、上記課題を解決するもので、高域の音圧レベルや再生帯域を確保できるようにすることを目的とするものである。
【0007】
【課題を解決するための手段】
上記課題を解決するために、本発明は以下の構成を有する。
【0008】
本発明の請求項1に記載の発明は、ダイアフラムの形状を、ボイスコイルとの結合部はボイスコイルとは反対側に突出させ、かつ前記ダイアフラムのボイスコイルとの結合部の内側は、ボイスコイルとは反対側にドーム形状に突出するとともに、そのダイアフラムの中心部は、ボイスコイル側に鋭角の立上り部を持ってへこんだ構造を有し、このへこんだ構造部は前記磁気回路と略平行な面としたものである。この構成により、ボイスコイルの振動を伝達ロスを少なくしてダイアフラムに伝達することができ、かつ、ダイアフラムの中心部がへこんだ構造となっているため、全高寸法が大きくならず、薄型化を実現することができる。
【0009】
【発明の実施の形態】
以下、本発明の実施の形態について図面を用いて説明する。
【0010】
(実施の形態1)
以下、実施の形態1を用いて、本発明の請求項1に記載の発明について説明する。
【0011】
図1は、本発明の一実施の形態のスピーカの断面図を示したもので、図2はダイアフラムの断面図を示したものである。
【0012】
図1、図2に示すごとく、着磁されたマグネット21を上部プレート22およびヨーク23により挟み込んで磁気回路24を構成している。この磁気回路24のヨーク23にフレーム26を結合し、このフレーム26に略円板状のダイアフラム27を接着し、このダイアフラム27に結合された円筒状のボイスコイル28を、上記磁気回路24の磁気ギャップ25にはまり込むように結合している。
【0013】
ここで、ダイアフラム27の形状は円板状で、図2のようにボイスコイル28との結合部Aは、ボイスコイル28とは反対側(上方)に円環状に突出させ、かつダイアフラム27のボイスコイルとの結合部の内側は、ボイスコイルとは反対側にドーム形状に突出するとともに、その中心部は、ボイスコイル28側に鋭角の立上り部を持ってへこんだ構造を有し、このへこんだ構造部は前記磁気回路と略平行な面としたものである。上記結合部Aにボイスコイル28を結合することにより、振動伝達ロスを少なくしてダイアフラム27に伝達することができ、かつ、ダイアフラム27の中心部がへこんだ構造となっているため、全高寸法が大きくならず、薄型化を実現することができる。
【0014】
また、ダイアフラム27の形状を中心部形状がへこんだ構造とすることによる二次的な効果として、スピーカに過大入力が印加されたり、外部からの風圧が加わったりすることにより、振動系が下方向に配置したままもとに戻らなくなる不良が発生していたものを、ダイアフラム27の中心部に設けられたへこんだ構造部分が、上部プレート22に当たり、反発することで防止することができる。
【0015】
【発明の効果】
以上のように、本発明のスピーカは、ダイアフラムのボイスコイルとの結合部を、ボイスコイルとは反対側に突出させ、かつ前記ダイアフラムのボイスコイルとの結合部の内側は、ボイスコイルとは反対側にドーム形状に突出するとともに、そのダイアフラムの中心部は、ボイスコイル側に鋭角の立上り部を持ってへこんだ構造を有し、このへこんだ構造部は前記磁気回路と略平行な面としたものである。この構成により、ボイスコイルの振動を伝達ロスを少なくしてダイアフラムに伝達することができ、かつ、全高寸法が大きくならず、薄型化を実現することができる。
【0016】
このように本発明は、薄型化を実現できる優れたスピーカを提供することができ、その工業的価値は非常に大なるものである。
【図面の簡単な説明】
【図1】 本発明の一実施の形態におけるスピーカの断面図
【図2】 本発明の一実施の形態におけるダイアフラムの断面図
【図】 従来のスピーカの断面図
【符号の説明】
21 マグネット
22 上部プレート
23 ヨーク
24 磁気回路
25 磁気ギャップ
26 フレーム
27 ダイアフラム
28 ボイスコイル
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker used in various audio equipment and information communication equipment.
[0002]
[Prior art]
A conventional speaker will be described with reference to FIG .
[0003]
FIG. 3 is a sectional view of a conventional speaker.
[0004]
As shown in FIG. 3 , a magnetized magnet 1 is sandwiched between an upper plate 2 and a yoke 3 to constitute a magnetic circuit 4. A frame 6 is coupled to the yoke 3 of the magnetic circuit 4, and a substantially dome-shaped diaphragm 7 is bonded to the peripheral edge of the frame 6. The voice coil 8 coupled to the diaphragm 7 is coupled so as to fit into the magnetic gap 5 of the magnetic circuit 4.
[0005]
[Problems to be solved by the invention]
In the above-described speaker, the diaphragm 7 is also planar in order to reduce the thickness. However, when the diaphragm 7 is planarized, the coupling portion with the voice coil 8 becomes a T-shape. Transmission has been worsened, and the sound pressure level in the high frequency range has been reduced, and the high frequency limit frequency has not been extended and the reproduction band has been narrowed.
[0006]
The present invention solves the above-described problems, and an object thereof is to ensure a high sound pressure level and reproduction band.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration.
[0008]
According to the first aspect of the present invention, the diaphragm is shaped such that the connecting portion with the voice coil protrudes on the opposite side of the voice coil, and the inside of the connecting portion of the diaphragm with the voice coil is the voice coil. with protruding dome-shaped on the side opposite to the center portion of the diaphragm has a recessed structure with a rising portion of the acute angle to the voice coil side, structures this for recessed is a substantially parallel with the magnetic circuit It is a surface . With this configuration, the vibration of the voice coil can be transmitted to the diaphragm with less transmission loss, and the central part of the diaphragm is recessed, so the overall height is not increased and the thickness is reduced. can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
(Embodiment 1)
Hereinafter, with reference to the first embodiment will be described the invention described in Motomeko 1 of the present invention.
[0011]
FIG. 1 is a sectional view of a speaker according to an embodiment of the present invention, and FIG. 2 is a sectional view of a diaphragm.
[0012]
As shown in FIGS. 1 and 2, a magnetized magnet 21 is sandwiched between an upper plate 22 and a yoke 23 to constitute a magnetic circuit 24. A frame 26 is coupled to the yoke 23 of the magnetic circuit 24, a substantially disk-shaped diaphragm 27 is bonded to the frame 26, and a cylindrical voice coil 28 coupled to the diaphragm 27 is connected to the magnetic circuit 24. The gap 25 is coupled so as to be fitted.
[0013]
Here, the shape of the diaphragm 27 is a disc shape, and as shown in FIG. 2, the coupling portion A with the voice coil 28 protrudes in an annular shape on the opposite side (upward) from the voice coil 28, and the voice of the diaphragm 27 The inside of the coupling part with the coil protrudes in a dome shape on the opposite side of the voice coil, and the center part has a structure with a concave part with an acute rising part on the voice coil 28 side . The structure portion has a surface substantially parallel to the magnetic circuit . By coupling the voice coil 28 to the coupling portion A, vibration transmission loss can be reduced and transmitted to the diaphragm 27, and the central portion of the diaphragm 27 is recessed, so that the overall height can be reduced. Thinning can be realized without increasing the size.
[0014]
Further, as a secondary effect of making the shape of the diaphragm 27 into a structure in which the shape of the central portion is recessed, an excessive input is applied to the speaker or an external wind pressure is applied, so that the vibration system is moved downward. In this case, the indented structure provided at the center of the diaphragm 27 hits the upper plate 22 and is repelled from the occurrence of a defect that does not return to its original state.
[0015]
【The invention's effect】
As described above, in the speaker of the present invention, the coupling portion with the voice coil of the diaphragm projects to the opposite side to the voice coil, and the inside of the coupling portion with the voice coil of the diaphragm is opposite to the voice coil. with protruding dome-shaped on the side, the center portion of the diaphragm has a recessed structure with a rising portion of the acute angle to the voice coil side, structures this for recessed was the magnetic circuit and substantially parallel to the plane Is. With this configuration, the vibration of the voice coil can be transmitted to the diaphragm with reduced transmission loss, and the overall height is not increased, so that the thickness can be reduced.
[0016]
As described above, the present invention can provide an excellent speaker that can be thinned, and its industrial value is very large.
[Brief description of the drawings]
1 is a cross-sectional view of a speaker according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a diaphragm according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a conventional speaker.
21 Magnet 22 Upper plate 23 Yoke 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Diaphragm 28 Voice coil

Claims (1)

ダイアフラムと、このダイアフラムに結合されるとともに、その一部が磁気回路の磁気ギャップに配置されたボイスコイルとを備え、前記ダイアフラムの、前記ボイスコイルとの結合部はボイスコイルとは反対側に突出し、かつ前記ダイアフラムのボイスコイルとの結合部の内側は、ボイスコイルとは反対側にドーム形状に突出するとともに、そのダイアフラムの中心部は、ボイスコイル側に鋭角の立上り部を持ってへこんだ構造を有し、このへこんだ構造部は前記磁気回路と略平行な面とした薄型スピーカ。A diaphragm and a voice coil coupled to the diaphragm and partially disposed in the magnetic gap of the magnetic circuit are provided, and the coupling portion of the diaphragm with the voice coil protrudes on the opposite side of the voice coil. And the inside of the joint of the diaphragm with the voice coil protrudes in a dome shape on the opposite side of the voice coil, and the center of the diaphragm is recessed with an acute rising part on the voice coil side A thin speaker in which the indented structure has a surface substantially parallel to the magnetic circuit .
JP2002208400A 2002-07-17 2002-07-17 Thin speaker Expired - Fee Related JP3966106B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002208400A JP3966106B2 (en) 2002-07-17 2002-07-17 Thin speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002208400A JP3966106B2 (en) 2002-07-17 2002-07-17 Thin speaker

Publications (2)

Publication Number Publication Date
JP2004056278A JP2004056278A (en) 2004-02-19
JP3966106B2 true JP3966106B2 (en) 2007-08-29

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ID=31932555

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Application Number Title Priority Date Filing Date
JP2002208400A Expired - Fee Related JP3966106B2 (en) 2002-07-17 2002-07-17 Thin speaker

Country Status (1)

Country Link
JP (1) JP3966106B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006166070A (en) * 2004-12-08 2006-06-22 Matsushita Electric Ind Co Ltd Speaker
CN107465980B (en) * 2017-08-04 2023-07-28 奥音科技(镇江)有限公司 Electroacoustic transducer with diaphragm

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000138995A (en) * 1998-11-02 2000-05-16 Hitachi Ltd Speaker device, television receiver and display device using the same
JP2000261887A (en) * 1999-03-05 2000-09-22 Foster Electric Co Ltd Electroacoustic transducer for portable information device
JP2001112089A (en) * 1999-10-04 2001-04-20 Matsushita Electric Ind Co Ltd Manufacturing method of speaker and diaphragm used in this speaker
JP2002125290A (en) * 2000-10-18 2002-04-26 Sony Corp Loudspeaker device

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