JPS58200694A - Diaphragm for speaker - Google Patents

Diaphragm for speaker

Info

Publication number
JPS58200694A
JPS58200694A JP8424082A JP8424082A JPS58200694A JP S58200694 A JPS58200694 A JP S58200694A JP 8424082 A JP8424082 A JP 8424082A JP 8424082 A JP8424082 A JP 8424082A JP S58200694 A JPS58200694 A JP S58200694A
Authority
JP
Japan
Prior art keywords
diaphragm
voice coil
ribs
uneven
longitudinal direction
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
JP8424082A
Other languages
Japanese (ja)
Inventor
Hideaki Inoue
秀明 井上
Shuji Saeki
周二 佐伯
Kazuhide Sato
和栄 佐藤
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 Holdings Corp
Original Assignee
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8424082A priority Critical patent/JPS58200694A/en
Publication of JPS58200694A publication Critical patent/JPS58200694A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To improve productivity and overall stiffness and to make easier to expand the regenerative band of the sound frequency characteristics, by adhering a surfacing material to both sides of a core material forming a film by means of heat press adhering or solvent based adhering, etc. CONSTITUTION:The peripheral of a rectangular flat board diaphragm 14 is supported by a frame 16 fitted with an edge part 15 to a yoke 12 which constitutes a magnetic circuit. A voice coil bobbin 17 is fitted to a position deviated in longitudinal direction from the central part of the diaphragm 14. A voice coil 19 is arranged between the bobbin 17 and a magnetic gap so that the voice coil can perform piston motion. The diaphragm 14 is made of thermoplastic resin so that projecting and recessing ribs 20', 20''... parallel in longitudinal direction by means of press molding, and a rib 21' to the opposite side to a voice coil driving part 14a alternately with the ribs 20', 20''... and coupled with the ribs 20', 20''... are provided. Both sides of a core material 22 of the rib 21' are adhered with a surfacing material 23 having high elasticity. As a result, the productivity and overall stiffness are improved, and the regenerative band of the sound pressure frequency characteristics is easily expanded.

Description

【発明の詳細な説明】 本発明は矩形平板スピーカのためのスピーカ用振動板に
関するものであり、特に心材の両面に表面材を接合した
矩形振動板自体の縦り向および横方向の強度を向−トさ
せることにより、高域まで平担な音圧周波数特性を得る
ことができるスピーカ用振動板を提供することを[1的
とするものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker diaphragm for a rectangular flat speaker, and in particular improves the strength in the vertical and lateral directions of the rectangular diaphragm itself, which has surface materials bonded to both sides of the core material. One object of the present invention is to provide a diaphragm for a speaker that can obtain flat sound pressure frequency characteristics up to high frequencies by adjusting the pitch.

一般に、スピーカ用振動板は紙パルプを抄造成形したも
のが多く、振動板形状はコーン形であった。そのため、
これら振動板を用いたスピーカの場合、振動板の内周部
と外周部とでは音源の位置がずれるため、音圧周波数特
性が゛ド担なスピーカを得らhにくい。これに対し、振
動板を平面とし?′f源の位置をそろえた平板スピーカ
は、音圧同波数特性の平担化を図る上で有利であり、ま
た、平面振動板を矩形とした平板スピーカはテレビジョ
ン受像機、ラジオ受信機、カセットチープレコーグとい
ったスピーカの増付は面積の限られた機器のスペースを
イj゛効に利用し、振動面積の拡大化を図るトでも利で
ある。
In general, speaker diaphragms are often made of paper pulp, and the diaphragm has a cone shape. Therefore,
In the case of speakers using these diaphragms, the position of the sound source is shifted between the inner and outer peripheries of the diaphragm, making it difficult to obtain a speaker with very good sound pressure frequency characteristics. On the other hand, what if the diaphragm is a flat surface? A flat speaker with aligned f sources is advantageous in flattening the same wavenumber characteristics of the sound pressure, and a flat speaker with a rectangular flat diaphragm can be used in television receivers, radio receivers, Adding a speaker such as a cassette cheap recorder is an advantage in making efficient use of the limited space of the device and expanding the vibration area.

ところで、矩形箋ト板スピーカに適合する平板振動板の
場合、ただ弔に振動板形状を矩形平板にしただけでは1
曲げに対する剛性が小さく分割振動が起こりやすく、広
帯域にわたり平担な周波数特性を得ることはむずかしい
。そのため、第1図に小tように発泡スチロール等のプ
ラス千ツク発泡体よりなる心材の両面にアルミニウム箔
等の表面伺2を接着した矩形平板振動板や、第2図に示
すようにアルミニクムハニカム構造体よりなる心材3の
両面にアルミニウノ、箔等の表面材4を接着した矩形)
ト板振動板が用いられている。前者の心材全体に発泡体
を用いた振動板の場合、コストが比較的安く、生産性が
良いといった利点を有しているが、小形の矩形平板振動
板とする場合、心材の11みを薄くする必要があり1発
泡体を熱線等により切断しなければならないため、その
t7J断時に発泡体の切断面が熱により収縮し1発泡倍
率が低下したのと同じとなり、重欧が重くなる。その結
果、能率が低下するといった欠点を有している。−ツバ
後者の振動板の場合、高い曲げ剛性が得られるが、心材
3がアルミハニカム構造体であるため、その6伺自体の
加1−(二程が複雑であり、製造コストが高くつくとい
った欠点がある。また、心ト(と表面ト4との接着の際
に、表面ト4め箔1!J!を下げて@駄の軽減化を図ろ
うとした場合、熱プレス等により接着を行う時にコア形
状内に密閉された+1!I 、I+、があるため、その
コアの形状が表面材の接着後に空気の収縮によって表面
材トに出てしまうといった欠点を有していた。そこで、
第3図に示すように熱可塑性樹脂フィルムをプレス成形
等の手段を用いて長しツノ向に凹凸1ヒ状のリプ6′、
6“・−・・・・を有する構造に成形した心材6の画面
にアルミニウム箔等の表面材6を接着した矩形平板振動
板が考えられる。
By the way, in the case of a flat diaphragm that is compatible with a rectangular board speaker, simply changing the diaphragm shape to a rectangular flat plate as a memorial service will not work.
It has low bending rigidity and is prone to splitting vibrations, making it difficult to obtain flat frequency characteristics over a wide band. Therefore, as shown in Fig. 1, a rectangular flat plate diaphragm with a core material made of plush foam such as styrofoam and surface plates 2 such as aluminum foil adhered to both sides, and an aluminum honeycomb as shown in Fig. 2 are used. A rectangular shape in which a surface material 4 such as aluminum UNO or foil is adhered to both sides of a core material 3 consisting of a structural body)
A top plate diaphragm is used. In the case of the former type of diaphragm using foam for the entire core material, it has the advantage of being relatively low cost and having good productivity, but when making a small rectangular flat diaphragm, it is necessary to make the core material thinner. Since it is necessary to cut the foam using a hot wire or the like, the cut surface of the foam shrinks due to the heat at the time of cutting at t7J, which is equivalent to a reduction in the foaming ratio and the weight of the foam becomes heavier. As a result, it has the disadvantage of reduced efficiency. - In the case of the latter type of diaphragm, high bending rigidity can be obtained, but since the core material 3 is an aluminum honeycomb structure, the 6th and 6th steps themselves are complicated and the manufacturing cost is high. There is a drawback.Also, when adhering the core 4 and the surface 4, if you try to lower the surface 4 foil 1!J! to reduce the damage, use heat press etc. to bond. Sometimes, since there is +1!I, I+ sealed within the core shape, the core shape has the disadvantage that the core shape comes out into the surface material due to air contraction after the surface material is bonded.
As shown in FIG. 3, a thermoplastic resin film is lengthened using a method such as press molding, and a lip 6' having an uneven surface in the direction of the horn is formed.
A rectangular flat plate diaphragm may be considered, in which a surface material 6 such as aluminum foil is adhered to the screen of a core material 6 formed into a structure having a shape of 6".

この振動板の場合、前記心(オ6は、表面材6と心(4
6との接着の際、心材6の形状内に密閉された凹凸がな
いため、心材6の形状が表面材6の表面に出にくい(熱
ブレス接着の場合)とか、溶剤が乾燥1−やすい(溶剤
系接着)といった利点を有しており、°また、第3図に
示すごとく縦方向の曲げaVc付する強度を向上させる
ことが可能となった。
In the case of this diaphragm, the core (O 6) is the surface material 6 and the core (4).
Since there are no sealed irregularities within the shape of the core material 6, the shape of the core material 6 is difficult to show on the surface of the surface material 6 (in the case of heat press bonding), and the solvent tends to dry (1-). Furthermore, as shown in FIG. 3, it has become possible to improve the strength of vertical bending aVc.

しかしながら、前記振動板を矩形モ板スピーカとして組
み)γてる場合、第4図に示すように振動板7の中央か
ら偏心した箇所にボイスコイルボン8を接合するため、
このボイスコイルボビン8を接着した部分7aの横Jj
向の曲げ強度は向上させることができるが、ボイスコイ
ル接着側と反対側(遠い側)の部分7bにおいては長毛
ノj向の凹凸のリブが補強さitていない。そのため前
記振動板7の7bの部分においては、横方向の曲げ強度
が弱く、振動板7が横Jj向の曲げ応力dを受けて曲が
、うた状態で振動するため、IIJ:主帯域の拡大化と
いった而からはかならずしも満足できるものではなかっ
た。。
However, when the diaphragm is assembled as a rectangular plate speaker, as shown in FIG.
The side Jj of the part 7a where this voice coil bobbin 8 is glued
Although the bending strength in the direction can be improved, the uneven ribs in the long hair direction are not reinforced in the portion 7b on the opposite side (far side) from the side to which the voice coil is attached. Therefore, in the portion 7b of the diaphragm 7, the bending strength in the lateral direction is weak, and the diaphragm 7 receives the bending stress d in the lateral Jj direction, causing the song to vibrate in a singing state. However, it was not always possible to be satisfied from the perspective of change. .

本発明はこのような従来の欠点を解消するものであり、
長1”−Jj向に平行に凹凸状のリブを設けると共にそ
の長手ノj向の−ノjの端部にのみF記凹凸状のリブと
交t7−するように凹凸状のリプを設けた心+4の両面
に人血ト4を接合した矩1ヒ乎板振動板とし、その振動
板の他Ijの端部側においてボイスコイルの駆動力を伝
達するように構成したものである。かかる構成によれば
、振動板の加l−1−程が筒中、であることからf乍製
し−やすく、また、ボイスコイルの駆動力が伝達される
部分から遠い部分における縦lj向および横Jj向の剛
性を向上させることができるため、音圧同波数特性の平
担な矩形平板スピーカに好適なスピーカ用振動板とする
ことができる利点を有する。
The present invention solves these conventional drawbacks,
Length 1" - An uneven rib is provided parallel to the Jj direction, and an uneven rib is provided only at the -j end in the longitudinal direction J so that it intersects with the uneven rib marked F. This is a rectangular 1-hi plate diaphragm with human blood 4 bonded to both sides of the heart + 4, and is configured to transmit the driving force of the voice coil at the other end of the diaphragm Ij.Such a configuration According to the above, since the diaphragm is applied in the cylinder, it is easy to manufacture, and also in the vertical lj direction and the lateral Jj direction in the part far from the part where the driving force of the voice coil is transmitted. Since the rigidity of the diaphragm can be improved, it has the advantage that it can be used as a speaker diaphragm suitable for a rectangular flat plate speaker with a flat sound pressure wavenumber characteristic.

以下、本発明について¥施例の図面と共に説明する1、
第6図および第6図は本発明の〜実施例を小しており、
第6図および第6図において、11はセンターボール、
12はヨーク、13は上言己ヨークに固定されたマグネ
ットであり、上記ヨーク12 トL、記センターポール
11との間に環状の磁気ギャップを形成する磁気回路を
構成している。
Hereinafter, the present invention will be explained with reference to drawings of examples.
FIG. 6 and FIG. 6 are miniature embodiments of the present invention;
6 and 6, 11 is a center ball;
12 is a yoke, and 13 is a magnet fixed to the yoke, which constitutes a magnetic circuit that forms an annular magnetic gap between the yoke 12, the toe L, and the center pole 11.

14は矩形IV−板振動板であり、そρ外周部がエツジ
部材16にて1記磁気回路を構成するヨーク12に取付
けた矩形のフレーム16に支持されている1、17は上
記矩形1V−板振動板14の中央部から長ト〃向に偏倚
した箇所に取付けたボイスコイルボビンであり、グンパ
一部材18にて−E記フレーム16に支持されており、
F記ボイスコイルボビン17の外因部に設けたボイスコ
イル19が一ト記磁気ギャップ内にピストン運動可能な
ように配置されている。ここで、ト記矩形平板振動板1
4は第7図および第8図に示すように熱可塑性樹脂フィ
ルムを用いてプレス成形等により長手Jj向にIV・行
な凹凸状のリプ2o′、26′・・・・・・を設けると
共にボイスコイル駆動部141Lと反対側において上開
門凸状リブ20’、 20”・・・・・・と交虻しかつ
上記凹凸状リブ20’、20  と結合さJまた凹凸状
リプ21を設けた6杓22の両面に比較的d′6弾性を
何する金属箔ゾは高分子フィルムでなる表面材23を接
着したものである。このような構成の矩形平板振動板1
4では、心材22に設けた凹凸状リプ20’ 、 20
”・・・・・・と凹凸状リプ21′が交尾するも。
Reference numeral 14 designates a rectangular IV-plate diaphragm, the outer periphery of which is supported by an edge member 16 on a rectangular frame 16 attached to the yoke 12 constituting the magnetic circuit 1. Reference numerals 1 and 17 represent the rectangular 1V-plate diaphragm. It is a voice coil bobbin attached to a position offset in the longitudinal direction from the central part of the plate diaphragm 14, and is supported by the -E frame 16 by a gunpah member 18,
A voice coil 19 provided on the external part of the F voice coil bobbin 17 is disposed within the A to magnetic gap so as to be capable of piston movement. Here, rectangular flat plate diaphragm 1
4, as shown in FIGS. 7 and 8, a thermoplastic resin film is used to provide uneven lips 2o', 26', 26', etc. in the longitudinal direction Jj by press molding, etc. On the side opposite to the voice coil drive section 141L, an uneven rib 21 is provided which intersects with the upper opening convex ribs 20', 20'' and is combined with the above uneven ribs 20', 20. 6. A surface material 23 made of polymer film is adhered to both sides of the ladle 22 with a metal foil having a relatively d'6 elasticity.The rectangular flat diaphragm 1 having such a structure
4, the uneven lips 20', 20 provided on the core material 22
”...and the uneven lips 21' are mating.

その交1する箇所がボイスコイル駆動部141Lから遠
い箇所14bにおいて行なわれているため、全体として
内部が凹凸状リプ2 d 、 20”・−・・・・およ
び21′によって密閉されない振動板とすることができ
る。そして。第9図に示すように艮fツノ向(縦Jj向
)の曲げ応力りに対する強度は長子ノj向に設けた凹凸
状リプ20’ 、 20”・・・・・・で補強され、ボ
イスコイル駆動部141L側での描Jj向の曲げ応力i
に対する強度はボイスコイルボビン17を接、−tAj
、!:によll)MH1□うえ0、・j64、え、イ8
3イ71.4動部14a側から遠い箇所14bでの横ノ
j向の曲げ応力yに対する強度は凹凸状リプ21′によ
り補強されており、全体としての強度を向トさせること
ができる。
Since the intersection point is at a point 14b far from the voice coil drive unit 141L, the entire inside of the diaphragm is not sealed by the uneven lips 2d, 20"...and 21'. As shown in Fig. 9, the strength against bending stress in the direction of the f-horn (longitudinal Jj direction) is determined by the uneven lips 20', 20'' provided in the longitudinal direction. , the bending stress i in the direction Jj on the side of the voice coil drive unit 141L
The strength against which the voice coil bobbin 17 is connected is -tAj
,! :yoll) MH1□Ue0,・j64,E,i8
3.71.4 The strength against the bending stress y in the lateral j direction at the point 14b far from the moving part 14a side is reinforced by the uneven lip 21', and the overall strength can be increased.

尚、上記の実施例では長手方向に設けた゛ド行な凹凸状
リプ20′、2d“問をボイスコイル駆動部14a側か
ら遠い箇所14bにおいて上記凹凸状リプ20’、20
”・・・・・・と交q、するように設けた凹凸状リグ2
1にて結合するようにしたが、これ以外にも第10図に
示すように長[方向に設けた平行な凹凸状リプ20’ 
、 20”・・・・・のそれぞれの間をボイスコイル駆
動部141L側から遠い筒所14bにおいて上記凹凸状
リプ20’ 、 20”・・・・・・と交qするように
設けた凹凸状リグ24’ 、 24”・・・・・・でも
って結合した心材の両面に表面材を接着して構成しても
、同様の作用効果を期待することができるものである。
In the above embodiment, the uneven lips 20', 20 provided in the longitudinal direction are replaced by the uneven lips 20', 20 at the portion 14b far from the voice coil drive section 14a side.
The uneven rig 2 is arranged so as to intersect with ``...''.
1, but in addition to this, as shown in FIG.
, 20''..., are provided in a cylindrical location 14b far from the voice coil drive unit 141L side so as to intersect with the uneven lips 20', 20''...... Even if surface materials are adhered to both sides of the core material bonded by the rigs 24', 24'', etc., similar effects can be expected.

以1−説明したように本発明によれば、フィルムを成形
[−た心+4の両面に熱プレス接着には溶剤系接着等の
Jj法で表面11重液層するとい−・た[程で作成でき
ることから、生産性が良く、コストが安くつくといった
利点を有している。壕だ、心材内の凹凸lヒ状の溝は全
て外部に貝通されているため、表面1の接着時にらHの
形状が表面トオの表面に出にくい(熱ブレス接着の場合
)とか、溶剤が乾燥しやすい(溶剤系接着の場合)とい
った利点を有している1、さらに、特性面においても、
縦Jj向の曲げ強度は長fJj向の凹凸状リプで補強さ
れ、ボイスコイル駆動側の購ツノ向の曲げ強度はボイス
コイルボビンを振動板に直接接着した“旧こより補強さ
ノ1、ボイスコイル駆動側と反対側の横ノj向の曲げ強
度は長トノj向の凹凸状リプに交軸する凹凸状リプによ
り補強されているため、全体的に剛性が向上することに
よって、音圧同波数特性の高域IIt生帯域の拡大化を
容すに行うことができるものである。
As explained above, according to the present invention, a film is formed by forming a heavy liquid layer on both sides of the core +4 using the JJ method such as solvent-based adhesive for heat press bonding. Since it can be created easily, it has the advantage of high productivity and low cost. Since all of the uneven grooves in the core wood are penetrated to the outside, it is difficult for the H shape to appear on the surface of the surface when bonding the surface 1 (in the case of heat press bonding), or when using solvents. It has the advantage of being easy to dry (in the case of solvent-based adhesives).1 Furthermore, in terms of characteristics,
The bending strength in the vertical Jj direction is reinforced by the concave-convex lip in the long fJj direction, and the bending strength in the direction of the horn on the voice coil drive side is reinforced by the voice coil drive, which is reinforced by bonding the voice coil bobbin directly to the diaphragm. The bending strength in the lateral j direction on the opposite side is reinforced by the uneven lip that is perpendicular to the uneven lip in the long tonnage j direction, so the overall rigidity is improved and the sound pressure same wave number characteristics are improved. It is possible to easily expand the high-frequency IIt raw band.

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

第1図、第2図および第3図は1足来の矩形1V−板振
動板の一部切欠@’t Pa1図、第4図は同振動板の
曲げ強度の説明図、第5図は本発明の矩形1ド板振動板
を用いた1ト板スピーカの平面図、第6図は同スピーカ
の断面図、第7図は本発明の矩形1ド板振動板の一実旋
例を示す斜視図、第8図は同振動板の断面図、第9図は
同振動板の曲げ強度の説明図。 第10図は同振動板の他の実施例を示す斜視図である。 。 14・・・・・・矩形・ト板振動板、20’ 、 20
”・・・・・・。 21’ 、 24’ 、 24”・・・・・・凹凸状リ
プ、22・・・・・・心材、23・・−・・・表面材、
17・旧・・ボイスコイルボビン、19・・・・−・ボ
イスコイル。 代理人の氏名 弁理士 中 尾 赦 男 ほか1名第1
図 ? 第2図 第3図 第4図 ワ 第 5 図 46図 第7図 4 1 7 第8図 3 第9図
Figures 1, 2, and 3 are partial cut-outs of a rectangular 1V-plate diaphragm from 1 pair @'tPa1, Figure 4 is an explanatory diagram of the bending strength of the same diaphragm, and Figure 5 is a diagram showing the bending strength of the same diaphragm. A plan view of a single plate speaker using the rectangular single plate diaphragm of the present invention, FIG. 6 is a sectional view of the same speaker, and FIG. 7 shows an actual example of the rectangular single plate diaphragm of the present invention. FIG. 8 is a sectional view of the diaphragm, and FIG. 9 is an explanatory diagram of the bending strength of the diaphragm. FIG. 10 is a perspective view showing another embodiment of the same diaphragm. . 14... Rectangular top plate diaphragm, 20', 20
21', 24', 24''... uneven lip, 22... core material, 23... surface material,
17. Old...Voice coil bobbin, 19...Voice coil. Name of agent: Patent attorney Masao Nakao and 1 other person No. 1
figure? Figure 2 Figure 3 Figure 4 Figure 5 Figure 46 Figure 7 4 1 7 Figure 8 3 Figure 9

Claims (1)

【特許請求の範囲】[Claims] 長手方向に複数の凹凸状リブを設けると共に長手h′向
の一端部側において上記凹凸状リブと交h:しかつト記
凹凸状リブと結合される凹凸状リブを設けた矩形の心材
の両面に矩形の表面材を接合してなり、−F記長手Jj
向の凹凸状リブと交互して結合される凹凸状リブが設け
られた箇所とは異なる長手か向の他端部側をボイスコイ
ル駆動部とするように構成してなるスピーカ用振動板。
Both surfaces of a rectangular core material provided with a plurality of uneven ribs in the longitudinal direction and intersecting with the uneven ribs at one end side in the longitudinal direction h', and provided with uneven ribs that are combined with the uneven ribs described in (g). It is made by joining a rectangular surface material to -F long length Jj
A diaphragm for a speaker configured such that the other end in the longitudinal direction, which is different from the location where the uneven ribs which are alternately coupled with the uneven ribs in the opposite direction, is provided serves as a voice coil drive section.
JP8424082A 1982-05-18 1982-05-18 Diaphragm for speaker Pending JPS58200694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8424082A JPS58200694A (en) 1982-05-18 1982-05-18 Diaphragm for speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8424082A JPS58200694A (en) 1982-05-18 1982-05-18 Diaphragm for speaker

Publications (1)

Publication Number Publication Date
JPS58200694A true JPS58200694A (en) 1983-11-22

Family

ID=13824937

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8424082A Pending JPS58200694A (en) 1982-05-18 1982-05-18 Diaphragm for speaker

Country Status (1)

Country Link
JP (1) JPS58200694A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527646U (en) * 1991-09-24 1993-04-09 日新製鋼株式会社 Pipe clogging prevention device
US6411723B1 (en) 1998-06-22 2002-06-25 Slab Technology Limited Loudspeakers
JP2003509878A (en) * 1999-09-06 2003-03-11 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Panel type speaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527646U (en) * 1991-09-24 1993-04-09 日新製鋼株式会社 Pipe clogging prevention device
US6411723B1 (en) 1998-06-22 2002-06-25 Slab Technology Limited Loudspeakers
JP2003509878A (en) * 1999-09-06 2003-03-11 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Panel type speaker

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