JPS63246100A - Rectangular plane speaker - Google Patents

Rectangular plane speaker

Info

Publication number
JPS63246100A
JPS63246100A JP8001687A JP8001687A JPS63246100A JP S63246100 A JPS63246100 A JP S63246100A JP 8001687 A JP8001687 A JP 8001687A JP 8001687 A JP8001687 A JP 8001687A JP S63246100 A JPS63246100 A JP S63246100A
Authority
JP
Japan
Prior art keywords
diaphragm
rectangular plane
rectangular
short side
voice coil
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
JP8001687A
Other languages
Japanese (ja)
Inventor
Hiroyuki Takewa
弘行 武輪
Shuji Saeki
周二 佐伯
Tadashi Tamura
忠司 田村
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 JP8001687A priority Critical patent/JPS63246100A/en
Publication of JPS63246100A publication Critical patent/JPS63246100A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent a resonance mode by fitting a drive cone, in which a diaphragm side is wide-based and an aperture surface is oval, between a rectangular plane diaphragm and respective voice coil bobbins with a long diameter direction to the short side direction of the diaphragm. CONSTITUTION:A drive cone 14 is formed into wide-base shape from one edge to other edge in which the aperture surface of one edge is circular and the aperture surface of other edge is oval. The cone 14 is fitted, by arranging an oval aperture surface, to the side of a diaphragm 9 with the long diameter direction of the aperture surface to the short side direction of the diaphragm 9. Since constitution is executed like this, primary and secondary resonance modes of the diaphragm 9 do not occur since an action point to eliminate two modes is driven. Since the long diameter of the cone 14 is >= 55% of the length of the short side of the diaphragm 9, and a driving force functions at both of the part of the loop of a mode and the part of the back of the mode, the resonance mode can be also suppressed. Consequently, the piston motion area of a rectangular plane diaphragm is enlarged, and a sound pressure frequency characteristic can be flattened.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は矩形平面振動板を使用した矩形平面スピーカに
関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rectangular flat speaker using a rectangular flat diaphragm.

従来の技術 音響機器の小型化、高性能化に伴い、スリムなキャビネ
ットや小さなスピーカキャビネットが用いられるように
なってきており、このスピーカキャビネットに納められ
るスピーカの形状も41!′I長い物や薄い物が作られ
ている。矩形平面振動板においては長辺方向に低い周波
数で共振するため、従来ではこの長辺方向の共振を抑え
て再生周波数帯域を拡大した矩形平面スピーカが知られ
ている。
Conventional technology As audio equipment becomes smaller and more sophisticated, slim cabinets and small speaker cabinets are being used, and the shape of the speakers that can be housed in these speaker cabinets is 41! 'I Long and thin items are made. Since a rectangular planar diaphragm resonates at a low frequency in the long side direction, rectangular planar speakers have been known that suppress resonance in the long side direction and expand the reproduction frequency band.

この矩形平面スピーカは、矩形平面振動板の長辺方向の
第1次、第2次自由共振モードを消去する位置にボイス
コイルボビンを直接に連結した構造であって、第4図に
示すようにII4成されている。
This rectangular plane speaker has a structure in which a voice coil bobbin is directly connected to a position that eliminates the first and second order free resonance modes in the long side direction of a rectangular plane diaphragm, and as shown in FIG. has been completed.

第4図(a)は従来の矩形平面スピーカの上面図で、第
4図(b)は断面図である。第4図において、各ボトム
プレート1と各トッププレート3は環状マグネット2を
挟持して、それぞれ環状磁気空隙4を有する複数の磁気
回路5を形成しており、各ボイスコイル6は、矩形平面
振動板9の短辺方向の中央で、かつ長辺方向′の自由共
振モードの第1次、第2次モードを消去する位1ffA
1.A2゜A3.A4に取付けられている。ボイスコイ
ル線を巻回したボイスコイルボビン7は、磁気空111
4中にボイスコイル6を懸垂するためにダンパー8を介
して前記トッププレート3に固着されている。
FIG. 4(a) is a top view of a conventional rectangular flat speaker, and FIG. 4(b) is a sectional view. In FIG. 4, each bottom plate 1 and each top plate 3 sandwich an annular magnet 2 to form a plurality of magnetic circuits 5 each having an annular magnetic gap 4, and each voice coil 6 has a rectangular plane vibration. 1ffA at the center in the short side direction of the plate 9 and to the extent that the first and second modes of the free resonance mode in the long side direction' are eliminated.
1. A2゜A3. It is attached to A4. The voice coil bobbin 7, on which the voice coil wire is wound, has a magnetic air 111.
The top plate 3 is fixed to the top plate 3 via a damper 8 in order to suspend the voice coil 6 therein.

そして矩形平面振、!II板9の内周部は前記ボイスコ
イルボビン7に固着され、外周部はエツジ10を介して
フレーム11に固着されている。
And rectangular plane swing! The inner peripheral part of the II plate 9 is fixed to the voice coil bobbin 7, and the outer peripheral part is fixed to the frame 11 via an edge 10.

第5図は矩形平面振動板9とボイスコイル6を長辺方向
の振動モードと重ねて表現しており、破$112カm2
次共振−E−i’、26111.ta13カm1次共振
モードである。矩形平面振動板9の長辺の長さをWとし
た場合に第2次共振モードの節の位置は端より(0,0
944・W) 、 (0,3560−W) 。
Figure 5 shows the rectangular plane diaphragm 9 and the voice coil 6 superimposed on the vibration mode in the long side direction, and the vibration mode is 112 cm2.
Next resonance-E-i', 26111. This is the ta13 cam primary resonance mode. When the length of the long side of the rectangular plane diaphragm 9 is W, the position of the node of the second resonance mode is (0,0
944・W), (0,3560-W).

(0,6440−W) 、 (0,9056・W)、第
1次共振モードの節の位置は端より(0,224・W)
 、 (0,776・W)である。ボイスコイルボビン
7が矩形平面振動板9に連結されている前記の位rPI
A1は(0,1130−W) 、A 2は(0,377
75・W) 、A3は(0,622,25・W)、A4
は(0,8770−W)である。
(0,6440-W), (0,9056・W), the position of the node of the first resonance mode is (0,224・W) from the end
, (0,776·W). The above-mentioned position rPI where the voice coil bobbin 7 is connected to the rectangular plane diaphragm 9
A1 is (0,1130-W), A2 is (0,377
75・W), A3 is (0,622,25・W), A4
is (0,8770-W).

そして自由共振モードを完全に消去するためには、節の
内と外の振#A差を考虐して、その位置を±10%の範
囲で修正する必要がある。
In order to completely eliminate the free resonance mode, it is necessary to consider the difference in vibration #A between the inside and outside of the node and correct its position within a range of ±10%.

発明が解決しようとする問題点 しかしながら、矩形平面fP動板9の長辺と短辺の長さ
の比が10:2を越えた場合には、短辺方向の自由共振
のm1次モードが、長辺方向の第2次共振モードよりも
低い周波数で生じるため、再生音圧が乱れるなどの問題
点があった。
Problems to be Solved by the Invention However, when the ratio of the length of the long side to the short side of the rectangular plane fP moving plate 9 exceeds 10:2, the m1-order mode of free resonance in the short side direction is Since this occurs at a lower frequency than the second-order resonance mode in the long side direction, there are problems such as disturbances in the reproduced sound pressure.

本発明は短辺方向の共振モードを抑え、音LE −周波
数特性が広い範囲で乱れない、優れた矩形平面スピーカ
を提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide an excellent rectangular flat speaker in which resonance modes in the short side direction are suppressed and sound LE-frequency characteristics are not disturbed over a wide range.

問題点を解決するための手段 本発明の矩形平面スピーカは、矩形平面振動板の短辺方
向の中央で、長辺方向の自由共微モードの第1、第2次
モードを消去する複数箇所を、ボイスコイルとマグネッ
トとの吸引反発によって駆動するよう構成するとともに
、矩形平面振動板と前記ボイスコイルが巻回された各ボ
イスコイルボビンとの間に、矩形平面振動板の側が裾広
がりでその開口面が楕円形のドライブコーンを設け、か
つドライブコーンの約2矩形平面振動板の側の開口面の
長径方向を矩形平面振動板の短辺方向にして取り付けた
ことを特徴とする。
Means for Solving the Problems The rectangular plane speaker of the present invention has a plurality of points in the center of the rectangular plane diaphragm in the short side direction to eliminate the first and second order modes of free co-differential modes in the long side direction. , is configured to be driven by attraction and repulsion between a voice coil and a magnet, and a rectangular plane diaphragm is provided between the rectangular plane diaphragm and each voice coil bobbin around which the voice coil is wound, with the side of the rectangular plane diaphragm widening at its hem and its opening surface. The present invention is characterized in that an elliptical drive cone is provided, and the drive cone is attached with the long diameter direction of the opening surface on the side of the rectangular plane diaphragm being set in the direction of the short side of the rectangular plane diaphragm.

作用 この構成によると、矩形平面振動板とドライブコーンと
の連結部では、開口面が楕円形のドライブコーンの長径
方向が矩形平面振動板の短辺方向にして取り付けられて
いるため、駆動力が七−ドの腹の部分と背の部分の両方
に働く状態を青ることができ、共振モードを抑えること
ができ、矩形平面振動板のピストンモーション領域が拡
大されて音圧周波数特性が平坦になる。
According to this configuration, at the connecting portion between the rectangular plane diaphragm and the drive cone, the drive cone, which has an elliptical opening surface, is attached with the long axis direction facing the short side of the rectangular plane diaphragm, so that the driving force is reduced. It is possible to suppress the state that acts on both the antinode part and the back part of the seventh chord, suppress the resonance mode, expand the piston motion area of the rectangular plane diaphragm, and flatten the sound pressure frequency characteristics. Become.

実施例 以下、本発明の一実施例を第1図〜第3図に基づいて説
明する。なお、従来例を示Ij第4図と同様の作用をな
すものには同一符号を付けてその説明を省く。  9 第1図(a)は本発明の矩形平面スピーカの上面図、第
1図(b)は第1図(a)の断面図を示し、次の点が第
4図とは異なっている。つまり、従来例を示す第4図で
は円筒形のボイスコイルボビン7が矩形平面振動板9〔
以下、振動板と称1)に直接に連結されていたが、第1
図ではドライブコーン14を介してボイスコイルボビン
7が1lii 1.IJ板9に連結されている。
EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3. Components having the same functions as those in FIG. 4, which shows a conventional example, are given the same reference numerals and their explanations will be omitted. 9. FIG. 1(a) is a top view of the rectangular flat speaker of the present invention, and FIG. 1(b) is a sectional view of FIG. 1(a), which differs from FIG. 4 in the following points. That is, in FIG. 4 showing the conventional example, the cylindrical voice coil bobbin 7 is replaced by the rectangular plane diaphragm 9 [
Hereinafter, it was directly connected to the diaphragm1), but the
In the figure, the voice coil bobbin 7 is connected to the drive cone 14 via the drive cone 14. It is connected to the IJ board 9.

ドライブコーン14は第2図と第3図にも承りように一
端の開口面B1が円形、他端の開口面B2が楕円形で、
前記一端から前記他端にかけて裾広がりに形成されてお
り、第1図においてはこのドライブコーン14は開口面
B2を振動板9の側にして、かつ間口面B2の長径方向
を振動板9の短辺方向に揃えて取り付けられている。そ
して、開口面B2の長径長さしは振動板9の短辺の長さ
の55%以上に設定されている。
As shown in FIGS. 2 and 3, the drive cone 14 has a circular opening surface B1 at one end and an elliptical opening surface B2 at the other end.
In FIG. 1, the drive cone 14 has an opening surface B2 facing the diaphragm 9, and a long axis direction of the front surface B2 facing the diaphragm 9. They are installed side by side. The length of the major axis of the opening surface B2 is set to be 55% or more of the length of the short side of the diaphragm 9.

また、各ボイスコイルボビン7と各ドライブコーン14
は振動板9の長辺の長さをWとした場合に、端から(0
,1130・W) 、 (0,37775・W)。
In addition, each voice coil bobbin 7 and each drive cone 14
is from the end (0
,1130・W), (0,37775・W).

(0,62225・W) 、 ((1,877(1・W
)の各点の110%の範囲に接続されている。
(0,62225・W) , ((1,877(1・W
) is connected to a 110% range of each point.

このように構成したため、振動板9の第1、第2次共振
モードは、それら2つのモードを消tvJ作点を駆動し
ているため発生しない。6らに、短辺方向の第1次共振
モードの節の位1ffGよ、短辺り長さを1″として’
 0.224” 、  ” 0.776”の位置であり
、モードの股の部分は0.776−0.224=“0.
552”の幅となる。ドライブコーン14の長径が振動
板9の短辺の長さの55%以上あるので、駆動力はモー
ドの腹の部分と背の部分の両方に働くため、この共振モ
ードも抑えられる。モしてドライブコーン14の長径が
長いけど力がより分散され等価的に節の位置を駆aする
状態に近づいてモード抑制効架も大きくなる。したがっ
てm妨I&9のピストンモーション領域が拡大され、音
圧周波数特性を平坦にできる。
With this configuration, the first and second resonance modes of the diaphragm 9 do not occur because these two modes are eliminated and the tvJ operating point is driven. 6, the node position of the first resonance mode in the short side direction is 1ffG, assuming the short side length is 1''.
0.224" and "0.776", and the mode's crotch part is 0.776-0.224="0.
The width is 552". Since the long axis of the drive cone 14 is 55% or more of the short side length of the diaphragm 9, the driving force acts on both the antinode and the back of the mode, so this resonance mode Even though the major axis of the drive cone 14 is long, the force is more dispersed and approaches the state where the position of the node is equivalently driven, and the mode suppression effect increases.Therefore, the piston motion area of M, I & 9 is also suppressed. is expanded, and the sound pressure frequency characteristics can be flattened.

発明の効果 以上のように本発明にJ:ると、矩形平面振動板と前記
ボイスコイルが巻回された再ボイスコイルボビンとの1
mに、矩形平面振動板の側が裾広がりでその開口面が楕
円形のドライブコーンを設け、かつドライブコーンの+
1h記矩形平面振動板の側の開口面の長径方向を矩形平
面振動板の短辺方向にして取り付けたため、駆動力がモ
ードの腹の部分と背の部分の両方に鋤(状態を得ること
ができ、共振モードを抑えることができ、矩形平面jh
i妨板のピストンモーション領域が拡大されて音圧周波
数特性を平坦にプることができるものである。
Effects of the Invention As described above, the present invention includes a rectangular plane diaphragm and a voice coil bobbin around which the voice coil is wound.
m is provided with a drive cone whose hem is wide on the side of the rectangular plane diaphragm and whose opening surface is oval, and the +
Since the long axis direction of the rectangular plane diaphragm side is set in the direction of the short side of the rectangular plane diaphragm, the driving force can be applied to both the antinode part and the back part of the mode. It is possible to suppress the resonance mode, and the rectangular plane jh
The piston motion area of the i-blocking plate is expanded and the sound pressure frequency characteristics can be flattened.

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

第1図(a)(b)は本発明の矩形平面スピーカの一実
施例の構成を示す平面図、断面図、第2図は第1図にお
けるドライブコーンの平面図、第3図(よドライブコー
ンの側面図、第4図(a)(b)は従来の矩形平面スピ
ーカの構成を示す平面図、断面図、第5図は矩形平面ス
ピーカの駆動状態を示す略側面図である。 6・・・ボイスコイル、7・・・ボイスコイルボビン、
9・・・矩形平面振動板、14・・・ドライブコーン、
B2・・・ドライブコーンの矩形平面ffi初板の側の
170口面、し・・・開口面B2の長径の長さ。 代理人   森  本  筏  弘 第2図 第3図
1(a) and (b) are a plan view and a sectional view showing the structure of an embodiment of the rectangular flat speaker of the present invention, FIG. 2 is a plan view of the drive cone in FIG. 1, and FIG. A side view of the cone, FIGS. 4(a) and 4(b) are a plan view and a sectional view showing the configuration of a conventional rectangular plane speaker, and FIG. 5 is a schematic side view showing the driving state of the rectangular plane speaker. 6. ...Voice coil, 7...Voice coil bobbin,
9... Rectangular plane diaphragm, 14... Drive cone,
B2... Rectangular plane ffi of the drive cone 170 opening face on the first plate side,... Length of the major axis of the opening face B2. Agent Hiroshi Morimoto KadoFigure 2Figure 3

Claims (1)

【特許請求の範囲】 1、矩形平面振動板の短辺方向の中央で、長辺方向の自
由共振モードの第1、第2次モードを消去する複数箇所
を、ボイスコイルとマグネットとの吸引反発によって駆
動するよう構成するとともに、矩形平面振動板と前記ボ
イスコイルが巻回された各ボイスコイルボビンとの間に
、矩形平面振動板の側が裾広がりでその開口面が楕円形
のドライブコーンを設け、かつドライブコーンの前記矩
形平面振動板の側の開口面の長径方向を矩形平面振動板
の短辺方向にして取り付けた矩形平面スピーカ。 2、矩形平面振動板の側のドライブコーンの開口面の長
径を矩形平面振動板の短辺の55%以上の長さにしたこ
とを特徴とする特許請求の範囲第1項記載の矩形平面ス
ピーカ。
[Scope of Claims] 1. At the center of the rectangular plane diaphragm in the short side direction, a plurality of points for erasing the first and second modes of the free resonance mode in the long side direction are created by attracting and repelling the voice coil and the magnet. A drive cone is provided between the rectangular plane diaphragm and each voice coil bobbin around which the voice coil is wound, the drive cone having a wide base on the side of the rectangular plane diaphragm and an elliptical opening surface; and a rectangular flat speaker in which the long axis direction of the opening surface on the side of the rectangular flat diaphragm of the drive cone is set in the direction of the short side of the rectangular flat diaphragm. 2. The rectangular planar speaker according to claim 1, wherein the major axis of the opening surface of the drive cone on the side of the rectangular planar diaphragm is set to be 55% or more of the short side of the rectangular planar diaphragm. .
JP8001687A 1987-04-01 1987-04-01 Rectangular plane speaker Pending JPS63246100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8001687A JPS63246100A (en) 1987-04-01 1987-04-01 Rectangular plane speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8001687A JPS63246100A (en) 1987-04-01 1987-04-01 Rectangular plane speaker

Publications (1)

Publication Number Publication Date
JPS63246100A true JPS63246100A (en) 1988-10-13

Family

ID=13706508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8001687A Pending JPS63246100A (en) 1987-04-01 1987-04-01 Rectangular plane speaker

Country Status (1)

Country Link
JP (1) JPS63246100A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110211725A1 (en) * 2008-11-19 2011-09-01 Hiroyuki Takewa Loudspeaker and electronic device including loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110211725A1 (en) * 2008-11-19 2011-09-01 Hiroyuki Takewa Loudspeaker and electronic device including loudspeaker
US8422723B2 (en) * 2008-11-19 2013-04-16 Panasonic Corporation Loudspeaker and electronic device including loudspeaker

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