JPH0129920Y2 - - Google Patents
Info
- Publication number
- JPH0129920Y2 JPH0129920Y2 JP15665480U JP15665480U JPH0129920Y2 JP H0129920 Y2 JPH0129920 Y2 JP H0129920Y2 JP 15665480 U JP15665480 U JP 15665480U JP 15665480 U JP15665480 U JP 15665480U JP H0129920 Y2 JPH0129920 Y2 JP H0129920Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- rectangular flat
- coil bobbin
- speaker
- flat plate
- 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
Links
- 230000005520 electrodynamics Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
【考案の詳細な説明】
本考案は矩形平板振動板を用いる動電型スピー
カに関し、高域の再生帯域を拡大できる高性能な
動電型スピーカを提供するものである。[Detailed Description of the Invention] The present invention relates to an electrodynamic speaker using a rectangular flat diaphragm, and provides a high-performance electrodynamic speaker that can expand the high frequency reproduction band.
第１図Ａ，Ｂは矩形平板振動板を用いた従来の
動電型スピーカを示している。第１図Ａ，Ｂにお
いて、１はセンターポール２が一体に形成された
ヨーク、３はヨーク１上に固定された環状のマグ
ネツト、４はマグネツト３上に固定された環状の
プレートであり、このプレート４の内周面とセン
ターポール２の外周面との間に環状の磁気ギヤツ
プが形成されている。５はフレームであり、磁気
回路を構成する上記ヨーク１は上記フレーム５の
内部底面に固定されている。６は矩形平板振動板
であり、この振動板６の外周部にはエツジ部材７
を介して上記フレーム５の開口部に支持されてい
る。８は振動板６の下面中央に固定された円筒形
のコイルボビンであり、このコイルボビン８にボ
イスコイル９が巻回され、このボイスコイル９が
前記磁気ギヤツプ部に挿入されている。１０はコ
イルボピン８を支持するダンパーである。 FIGS. 1A and 1B show a conventional electrodynamic speaker using a rectangular flat diaphragm. In FIGS. 1A and B, 1 is a yoke with a center pole 2 integrally formed, 3 is an annular magnet fixed on the yoke 1, and 4 is an annular plate fixed on the magnet 3. An annular magnetic gap is formed between the inner peripheral surface of the plate 4 and the outer peripheral surface of the center pole 2. Reference numeral 5 denotes a frame, and the yoke 1 constituting the magnetic circuit is fixed to the inner bottom surface of the frame 5. 6 is a rectangular flat plate diaphragm, and an edge member 7 is provided on the outer periphery of this diaphragm 6.
It is supported by the opening of the frame 5 through the opening of the frame 5. A cylindrical coil bobbin 8 is fixed to the center of the lower surface of the diaphragm 6. A voice coil 9 is wound around the coil bobbin 8, and the voice coil 9 is inserted into the magnetic gap. 10 is a damper that supports the coil bopin 8.
しかしながら、上記従来例のように矩形平板振
動板６の中央を駆動する場合には、振動板６の固
有共振が低い周波数で生じ、スピーカの再生帯域
が非常に狭くなる欠点があつた。 However, when driving the center of the rectangular flat diaphragm 6 as in the conventional example, the natural resonance of the diaphragm 6 occurs at a low frequency, resulting in a drawback that the reproduction band of the speaker becomes extremely narrow.
第２図は上記従来例における振動板の第１次共
振時の振動モードを示しており、この第１次共振
時には、矩形平板振動板６の短辺にほぼ平行な２
本の節線ａ，a′が生じるものである。このような
振動モードが生じる従来のスピーカにおいては、
第４図のａに示すように、音圧周波数特性におい
て第１次共振周波数f1でピークが生じ音圧平担帯
域が著しく狭くなるものである。 FIG. 2 shows the vibration mode at the time of the first resonance of the diaphragm in the above-mentioned conventional example.
This is where the node lines a and a' of the book occur. In conventional speakers where such vibration modes occur,
As shown in FIG. 4a, a peak occurs at the first resonance frequency f1 in the sound pressure frequency characteristic, and the sound pressure flat band becomes extremely narrow.
本考案は上記従来の欠点を除去するものであ
り、以下に本考案の一実施例について第３図Ａ，
Ｂとともに説明する。 The present invention eliminates the above-mentioned conventional drawbacks, and an embodiment of the present invention will be described below with reference to FIGS. 3A and 3A.
This will be explained together with B.
本実施例の特徴は、第３図Ａ，Ｂに示すよう
に、前記従来例における中心駆動により振動板６
の生じる２本の節線ａ，a′の内の一方の節線a′部
にコイルボビン８を固定し、この節線a′部を駆動
する点にある。 The feature of this embodiment is that, as shown in FIGS. 3A and 3B, the diaphragm 6 is driven by the central drive in the conventional example.
The coil bobbin 8 is fixed to one of the two nodal lines a and a' where the above occurs, and this nodal line a' is driven.
このように、一方の節線部のみを駆動する場合
には、第４図にｂで示すように、共振周波数1に
おける音圧ピークが実用上問題とならない程度に
小さくでき、高次の共振周波数2まで再生帯域を
拡大できるものである。 In this way, when only one node is driven, the sound pressure peak at resonance frequency 1 can be reduced to an extent that does not pose a practical problem, as shown by b in Figure 4, and the sound pressure peak at resonance frequency 1 can be reduced to an extent that does not pose a practical problem. It is possible to expand the playback band up to 2 .
本考案は上記のように、１個の磁気回路のみを
用い矩形平板振動板を１点駆動する簡単な構成
で、第１次共振周波数における音圧ピークを抑制
し、実用上ほとんど問題のない音圧特性を得るこ
とが可能であり、再生帯域の拡大がはかれるとと
もに、例えば全ての節部分を駆動する多点駆動方
式のスピーカよりも量産性に優れ、低コストなス
ピーカを実現できるという利点を有するものであ
る。 As mentioned above, the present invention has a simple structure in which a rectangular flat diaphragm is driven at one point using only one magnetic circuit, suppresses the sound pressure peak at the first resonance frequency, and produces a sound with almost no practical problems. It has the advantage of being able to obtain high-pressure characteristics, expanding the reproduction band, and being able to realize a speaker that is easier to mass produce and at a lower cost than, for example, a multi-point drive system speaker that drives all nodes. It is something.
第１図Ａ，Ｂは従来の動電型スピーカの上面図
および断面図、第２図Ａ，Ｂは同スピーカの第１
次共振モードを示す図、第３図Ａ，Ｂは本考案の
一実施例における動電型スピーカの上面図および
断面図、第４図は従来および本考案の動電型スピ
ーカの音圧周波数特性図である。
１……ヨーク、２……センターポール、３……
マグネツト、４……プレート、５……フレーム、
６……矩形平板振動板、７……エツジ部材、８…
…コイルボビン、９……ボイスコイル、１０……
ダンパー。
Figures 1A and B are a top view and a cross-sectional view of a conventional electrodynamic speaker, and Figures 2A and B are the first part of the same speaker.
Figures 3A and 3B are top views and cross-sectional views of an electrodynamic speaker according to an embodiment of the present invention, and Figure 4 is the sound pressure frequency characteristics of the conventional and present electrodynamic speakers. It is a diagram. 1... Yoke, 2... Center pole, 3...
Magnet, 4...Plate, 5...Frame,
6... Rectangular flat plate diaphragm, 7... Edge member, 8...
...Coil bobbin, 9...Voice coil, 10...
damper.
Claims (1)
形の短辺方向に平行となる矩形平板振動板に、上
記２本の節線の内の一方の節線の中央部にのみ、
１つのコイルボビンを固定し、上記コイルボビン
の駆動により上記矩形平板振動板の第１次共振モ
ードを抑えたことを特徴とする動電型スピーカ。 In a rectangular flat plate diaphragm that has two nodal lines for the first-order resonance mode and is parallel to the short side direction of the rectangle, only at the center of one of the two nodal lines,
An electrodynamic speaker characterized in that one coil bobbin is fixed and the first resonance mode of the rectangular flat plate diaphragm is suppressed by driving the coil bobbin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15665480U JPH0129920Y2 (en) | 1980-10-31 | 1980-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15665480U JPH0129920Y2 (en) | 1980-10-31 | 1980-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5780995U JPS5780995U (en) | 1982-05-19 |
| JPH0129920Y2 true JPH0129920Y2 (en) | 1989-09-12 |
Family
ID=29515800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15665480U Expired JPH0129920Y2 (en) | 1980-10-31 | 1980-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0129920Y2 (en) |
-
1980
- 1980-10-31 JP JP15665480U patent/JPH0129920Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5780995U (en) | 1982-05-19 |
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