JPS6024059Y2 - piezoelectric speaker - Google Patents
piezoelectric speakerInfo
- Publication number
- JPS6024059Y2 JPS6024059Y2 JP11972580U JP11972580U JPS6024059Y2 JP S6024059 Y2 JPS6024059 Y2 JP S6024059Y2 JP 11972580 U JP11972580 U JP 11972580U JP 11972580 U JP11972580 U JP 11972580U JP S6024059 Y2 JPS6024059 Y2 JP S6024059Y2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric ceramic
- piezoelectric
- diaphragm
- ceramic element
- speaker
- 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
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
【考案の詳細な説明】
この考案は圧電セラミック素子を駆動源とした新規なス
ピーカーの構造に関する。[Detailed Description of the Invention] This invention relates to a novel speaker structure using a piezoelectric ceramic element as a driving source.
従来スピーカーの駆動源として動電型駆動機構が最も多
用されているが、この種の駆動源は構造が複雑であるこ
とから、部品点数も多く、又組立工数が大きい事から思
うようにコストダウン図ることが難しい。Conventionally, an electrodynamic drive mechanism is most commonly used as a drive source for speakers, but this type of drive source has a complex structure, a large number of parts, and a large number of assembly steps, making it difficult to reduce costs. It is difficult to plan.
一方圧電セラミック素子を駆動源とした圧電型スピーカ
ーは構造が簡単であるので大幅なコストダウンを具現す
ることが可能であり主として小口径のスピーカーに採用
されてきている。On the other hand, piezoelectric speakers using a piezoelectric ceramic element as a driving source have a simple structure and can achieve significant cost reductions, and have been mainly used in small-diameter speakers.
しかるに従来の圧電型スピーカーは動電型スピーカーの
駆動部を圧電セラミック素子に置換したものにすぎない
。However, conventional piezoelectric speakers are nothing more than an electrodynamic speaker in which the drive section is replaced with a piezoelectric ceramic element.
そこで、この考案は圧電セラミック素子が極めて簡単な
構成の駆動源である事より、振動板の形状を任意に選択
することができる点に着目して考案したものであって、
以下図面に示す実施例について詳しく説明する。Therefore, this idea was devised by focusing on the fact that the piezoelectric ceramic element is a drive source with an extremely simple configuration, and the shape of the diaphragm can be arbitrarily selected.
The embodiments shown in the drawings will be described in detail below.
第１図及び第２図に示すスピーカーは一面開口箱型フレ
ーム１の開口縁にｖ字型に折曲した振動板２の両端縁を
結合し、当該ｖ字型振動板の折り曲げ稜に圧電セラミッ
ク素子３を結合した構造を有する。The speaker shown in FIGS. 1 and 2 has both ends of a diaphragm 2 bent in a V-shape connected to the opening edge of a box-shaped frame 1 that is open on one side, and a piezoelectric ceramic is attached to the bent edge of the V-shaped diaphragm. It has a structure in which elements 3 are combined.
前記振動板２は圧電セラミック３の質量より充分に小さ
い事が必要で、たとえばアルミニウム箔等の軽金属箔が
適している。The diaphragm 2 needs to be sufficiently smaller in mass than the piezoelectric ceramic 3, and a light metal foil such as aluminum foil is suitable, for example.
又圧電セラミック素子３は同極を対向せしめて重ね合せ
たバイモルフ型又は金属板と重ね合わせたユニモルフ型
が使用され、その形状は稜の方向に直交する長手方向を
有する矩形状が適当であるが円形のものでも充分に使用
できる。The piezoelectric ceramic element 3 may be a bimorph type in which the same polarities are stacked on top of each other, or a unimorph type in which metal plates are stacked on top of each other. Even circular ones can be used.
当該圧電セラミック素子３の両極に電気接続した入力端
子４，４より音声信号を入力すると、圧電セラミック素
子３は入力信号の周波数に対応した節を境として、その
内外部の振動方向が逆になるような屈曲振動を行い、こ
れにより振動板２が付勢され、大気中に音波を放射する
。When an audio signal is input from the input terminals 4, 4 electrically connected to both poles of the piezoelectric ceramic element 3, the internal and external vibration directions of the piezoelectric ceramic element 3 are reversed with a node corresponding to the frequency of the input signal as the boundary. This bending vibration energizes the diaphragm 2 and emits sound waves into the atmosphere.
当該スピーカーは振動波形状を細長くすることができる
ので、長手方向と直交方向の指向性を拡大せしめること
ができる。Since the speaker can elongate the vibration wave shape, the directivity in the longitudinal direction and the orthogonal direction can be expanded.
第３図は、振動板２に複数個の圧電セラミック素子３を
結合せしめたものである。FIG. 3 shows a vibration plate 2 with a plurality of piezoelectric ceramic elements 3 coupled thereto.
当該スピーカーは前述のスピーカーの効果を有する他、
音響輻射能率の向上を図るとともに、複数の圧電セラミ
ック素子３を並列に電気接続することにより入力インピ
ーダンスを下げ、増幅器とのインピーダンスマツチラグ
を改善することができる。In addition to having the effects of the above-mentioned speaker, the speaker also has the following effects:
In addition to improving the acoustic radiation efficiency, by electrically connecting a plurality of piezoelectric ceramic elements 3 in parallel, it is possible to lower the input impedance and improve impedance match lag with the amplifier.
第４図は振動板２に複数個の圧電セラミック素子３ａ、
３ｂを結合し、しかも各々の圧電セラミック素子３ａ、
３ｂの共振周波数をスタガー的に異ならしめることによ
り再生周波数帯域の拡大を図ったものである。FIG. 4 shows a plurality of piezoelectric ceramic elements 3a on the diaphragm 2,
3b, and each piezoelectric ceramic element 3a,
By making the resonant frequencies of 3b different in a staggered manner, the reproduction frequency band is expanded.
各々の圧電セラミック素子の共振周波数を異ならしめる
具体的手段は図示したように形状を異ならしめる他、大
きさ、材質を異ならしめることにより遠戚できる。The specific means for making the resonant frequencies of the piezoelectric ceramic elements different can be made not only by making them different in shape as shown in the figure, but also by making them different in size and material.
第５図はＷ字形に折り曲げた振動板６のそれぞれの折り
曲げ稜に圧電セラミック素子３，３を結合したものであ
る。FIG. 5 shows a diaphragm 6 bent into a W-shape, with piezoelectric ceramic elements 3, 3 coupled to each bending edge.
この場合は輻射面積の拡大により輻射能率を向上せしめ
る利点を有する。This case has the advantage of improving radiation efficiency by expanding the radiation area.
又当該スピーカーには前述のごとく、共振周波数の異な
る圧電セラミック素子を結合することにより再生周波数
帯域の拡大を図ることができる。Further, as described above, the reproduction frequency band can be expanded by coupling piezoelectric ceramic elements having different resonance frequencies to the speaker.
第１図及び第２図はそれぞれこの考案の圧電型スピーカ
ーの斜視図及び断面図、第３図、第４図、第５図はそれ
ぞれこの考案の他の実施例の振動部の斜視図である。1 and 2 are respectively a perspective view and a sectional view of a piezoelectric speaker of this invention, and FIGS. 3, 4, and 5 are perspective views of a vibrating part of another embodiment of this invention, respectively. .
Claims (1)
稜に結合した圧電セラミック素子と、圧電セラミック素
子に音声信号を印加する手段を具備した圧電型スピーカ
ー。 ２ 振動板がＷ字状に折り曲げられ、それぞれの折り曲
げ稜に圧電セラミック素子を結合してなる実用新案登録
請求の範囲第１項記載の圧電型スピーカー。 ３ 折り曲げ稜に複数個の圧電セラミック素子を結合し
てなる実用新案登録請求の範囲第１項又は第２項記載の
圧電型スピーカー。 ４ 複数個の圧電セラミック素子の共振周波数がそれぞ
れ異なることを特徴とする実用新案登録請求の範囲第３
項記載の圧電型スピーカー。[Scope of Claim for Utility Model Registration] 1. A piezoelectric speaker comprising a diaphragm bent in a ■-shape, a piezoelectric ceramic element coupled to the bent edge of the diaphragm, and means for applying an audio signal to the piezoelectric ceramic element. 2. The piezoelectric speaker according to claim 1, wherein the diaphragm is bent into a W-shape and a piezoelectric ceramic element is bonded to each bent edge. 3. The piezoelectric speaker according to claim 1 or 2 of the utility model registration, which is formed by bonding a plurality of piezoelectric ceramic elements to a bent edge. 4 Utility model registration claim No. 3 characterized in that the resonant frequencies of a plurality of piezoelectric ceramic elements are different from each other.
Piezoelectric speaker described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11972580U JPS6024059Y2 (en) | 1980-08-22 | 1980-08-22 | piezoelectric speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11972580U JPS6024059Y2 (en) | 1980-08-22 | 1980-08-22 | piezoelectric speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5743697U JPS5743697U (en) | 1982-03-10 |
| JPS6024059Y2 true JPS6024059Y2 (en) | 1985-07-17 |
Family
ID=29480383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11972580U Expired JPS6024059Y2 (en) | 1980-08-22 | 1980-08-22 | piezoelectric speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6024059Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039766U (en) * | 1983-08-27 | 1985-03-19 | 富士重工業株式会社 | engine refueling device |
| JP5668233B1 (en) * | 2014-03-26 | 2015-02-12 | 株式会社サウンドファン | Universal speaker |
-
1980
- 1980-08-22 JP JP11972580U patent/JPS6024059Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5743697U (en) | 1982-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6278790B1 (en) | Electroacoustic transducers comprising vibrating panels | |
| WO1998028942A1 (en) | Electroacoustic transducers comprising vibrating panels | |
| JP3180646B2 (en) | Speaker | |
| CN211959524U (en) | Sound production device | |
| CN107396256A (en) | Loudspeaker enclosure | |
| US5325439A (en) | Loudspeaker apparatus | |
| JPS6024059Y2 (en) | piezoelectric speaker | |
| JPS6024060Y2 (en) | piezoelectric speaker | |
| JPS6024058Y2 (en) | piezoelectric speaker | |
| JPS6133510B2 (en) | ||
| JPS636956Y2 (en) | ||
| JPS6024051Y2 (en) | piezoelectric vibrator | |
| JPH0224319Y2 (en) | ||
| JP3180787B2 (en) | Speaker | |
| JP2001119793A (en) | Piezoelectric speaker | |
| JPS6221118Y2 (en) | ||
| JPS581032Y2 (en) | flat speaker | |
| JPH0126239B2 (en) | ||
| JPS63312800A (en) | Electroacoustic transducer | |
| JPS6336798Y2 (en) | ||
| JPS605680Y2 (en) | flat speaker | |
| JPS605679Y2 (en) | electroacoustic transducer | |
| JPS6024052Y2 (en) | piezoelectric vibrator | |
| JPH024552Y2 (en) | ||
| JPS61121700A (en) | Flat plate diaphragm |