JPS6031433B2 - speaker - Google Patents
speakerInfo
- Publication number
- JPS6031433B2 JPS6031433B2 JP17092179A JP17092179A JPS6031433B2 JP S6031433 B2 JPS6031433 B2 JP S6031433B2 JP 17092179 A JP17092179 A JP 17092179A JP 17092179 A JP17092179 A JP 17092179A JP S6031433 B2 JPS6031433 B2 JP S6031433B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- vibration
- driving
- speaker
- nodes
- 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
- 239000011521 glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
【発明の詳細な説明】
この発明はガラス板などの平面振動板を用いたスピーが
こ関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker system using a flat diaphragm such as a glass plate.
従来一般のコーン形スピーカの他に圧電形スピーカとい
うものがあり、圧電素子としてチタン酸バリウムなどの
セラミックを用い振動板を振動させるものや圧電素子を
組合せて直接振動板としたものなどがみられた。In addition to conventional conventional cone-shaped speakers, there are piezoelectric speakers, such as those that use ceramics such as barium titanate as a piezoelectric element to vibrate a diaphragm, and those that combine piezoelectric elements to form a direct diaphragm. Ta.
しかし、構造が簡単で小型軽量、周波数特性もまあまあ
という点を除いては、感度が悪く不安定ということで現
在ではほとんど用いられていない。この発明は原理的に
はこの圧電型のスピーカに近いものであるが、感度もよ
り高く、周波数特性も良いスピーカを得ることを目的と
している。However, apart from the fact that it has a simple structure, small size and light weight, and fair frequency characteristics, it is rarely used today due to its poor sensitivity and instability. The present invention is similar in principle to this piezoelectric speaker, but aims to provide a speaker with higher sensitivity and better frequency characteristics.
振動板としては正方形のような単純な形状で、ガラス板
など平面性を有する平面振動板を用いたものである。一
般にコーン形スピーカでも同機であるが、分割振動の影
響を減らし、かつ再生可能な周波数を高くするには剛性
が高く密度が小さい振動板を使うことが望まれる。また
平面振動板のような単純な形状のものを用いれば分割振
動の節の部分を多点駆動することにより分割振動を消去
するという方法が使える。分割振動のモードとしては大
きくわけて第１図イのように節が中心を通る振動モード
の場合と、口のように中心を通らず節の交点が複数生じ
る場合がある。The diaphragm has a simple shape such as a square, and a flat diaphragm such as a glass plate is used. Generally, cone-shaped speakers are the same, but in order to reduce the effects of split vibration and increase the reproducible frequency, it is desirable to use a diaphragm with high rigidity and low density. Furthermore, if a simple-shaped diaphragm such as a flat diaphragm is used, it is possible to eliminate the divided vibration by driving the nodes of the divided vibration at multiple points. The modes of split vibration can be roughly divided into two types: a vibration mode in which the nodes pass through the center, as shown in Figure 1A, and a vibration mode in which the nodes do not pass through the center, as in the case of a mouth, where multiple intersections of nodes occur.
ａのような振動モードは振動板の中心に対して対称な分
布の駆動力で駆動すれば消すことができ、ｂのような振
動モードに対しては一点駆動では消すことは不可能であ
り、節の交点にあたる位置に駆動力を与える、すなわち
複数の駆動力をもって多点駆動することによって、消す
ことができる。以上のことから第２図のように平面振動
板１の振動モードの筋の交点でかつ中心２に対して点対
称の位置３ａ，３ｂ，３ｃ，３ｄ等に圧電素子４をそれ
ぞれ設置して多点駆動するようにすれば分割振動を除去
することができる。A vibration mode such as a can be eliminated by driving with a driving force with a symmetrical distribution with respect to the center of the diaphragm, and a vibration mode such as b cannot be eliminated by driving at one point. It can be erased by applying a driving force to the intersection of the nodes, that is, by driving at multiple points with a plurality of driving forces. Based on the above, as shown in FIG. If point driving is used, split vibration can be eliminated.
より高い振動数の分割振動のモ−ド‘こ対しては、上記
の条件を満たす多数の駆動点を設けることにより排除で
きる。第３図イ，口は構造を示した図で、平面振動板１
としてガラス板を用い、第２図で示したそれぞれの駆動
位置に圧電素子４を接着して取付けるとともにガラス板
のサスペンションとＱダンプを行なうゴム５を貼り付け
、さらにその背面にはキャビネットへの取付け等のため
のハードボード６を装着する。Higher frequency split vibration modes can be eliminated by providing a large number of driving points that meet the above conditions. Figure 3 A shows the structure of the flat diaphragm 1.
Piezoelectric elements 4 are glued and attached to each drive position shown in Fig. 2, and rubber 5 is attached to suspend the glass plate and perform Q-dumping, and the back side of the piezoelectric element 4 is attached to a glass plate for mounting to a cabinet. Attach the hard board 6 for etc.
また口で示すように必要に応じて樹脂７で圧電素子４を
モールドしても良い。８は圧電素子４のリード線で、４
つの氏電素子４の後続法はそれぞれが同位相で駆動する
ようにすれば、直列、並列、直並列接続のいずれでも良
く、能率、インピーダンス等を考慮し任意に選ぶことが
できる。Furthermore, as shown in the figure, the piezoelectric element 4 may be molded with resin 7 if necessary. 8 is the lead wire of the piezoelectric element 4;
The method for succeeding the two electric current elements 4 may be series, parallel, or series-parallel connection as long as they are driven in the same phase, and can be arbitrarily selected in consideration of efficiency, impedance, etc.
このような構造において、アンプ系より圧電素子に再生
信号を加えるとガラス板が駆動されて音圧を発生するわ
けであるが、多点駆動であるため分割振動による共振も
少なく歪特性、周波数特性も良くなるとともに、圧電素
子も複数個用いるために能率も高く、高い音圧しベルが
得られる。In such a structure, when a playback signal is applied to the piezoelectric element from the amplifier system, the glass plate is driven and sound pressure is generated.However, because it is multi-point drive, there is less resonance due to divided vibration, and the distortion and frequency characteristics are reduced. In addition, since multiple piezoelectric elements are used, efficiency is also high, and a high sound pressure level can be obtained.
平面振動板は正方形に限らず長方形、円形なども考えら
れるが、振動板面積の大きくとれる正方形が通しており
、また実施例のように普通の板ガラスを使用することに
より設計、製造が容易で、全体の形状もフラットでコン
パクトとなるのでスピーカキヤビネツトへの組み込みも
楽にできる。なお実施例では圧電素子を４つ使って多点
駆動する場合について述べたが、平面振動板の形状、種
々振動モード、音質、指向性等に応じて使用個数および
、設置位置を決定すれば良い。The planar diaphragm is not limited to square, but may also be rectangular, circular, etc., but a square diaphragm allows for a large diaphragm area, and it is easy to design and manufacture by using ordinary plate glass as in the example. The overall shape is flat and compact, making it easy to incorporate into speaker cabinets. Although the example described the case of multi-point driving using four piezoelectric elements, the number of piezoelectric elements to be used and the installation position may be determined depending on the shape of the plane diaphragm, various vibration modes, sound quality, directivity, etc. .
第１図は振動モードを示す説明図、第２図、第３図はこ
の発明の実施例を示す構造図である。
図中１・・・・・・平面振動板、４・・・・・・圧電素
子、５・・・…ゴム、６……ハードボード、７……モー
ルドである。第１図
第２図
第３図FIG. 1 is an explanatory diagram showing vibration modes, and FIGS. 2 and 3 are structural diagrams showing an embodiment of the present invention. In the figure, 1... plane diaphragm, 4... piezoelectric element, 5... rubber, 6... hard board, 7... mold. Figure 1 Figure 2 Figure 3
Claims (1)
対して点対称の位置に圧電素子を設置して多点駆動する
ことを特徴としたスピーカ。1. A speaker characterized by multi-point driving by installing piezoelectric elements at the intersections of nodes of vibration modes of a plane diaphragm and at positions symmetrical with respect to the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17092179A JPS6031433B2 (en) | 1979-12-27 | 1979-12-27 | speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17092179A JPS6031433B2 (en) | 1979-12-27 | 1979-12-27 | speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5693499A JPS5693499A (en) | 1981-07-29 |
| JPS6031433B2 true JPS6031433B2 (en) | 1985-07-22 |
Family
ID=15913813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17092179A Expired JPS6031433B2 (en) | 1979-12-27 | 1979-12-27 | speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031433B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07105988B2 (en) * | 1988-07-29 | 1995-11-13 | 株式会社村田製作所 | Piezoelectric speaker |
| JPH0233300A (en) * | 1988-07-22 | 1990-02-02 | Murata Mfg Co Ltd | Piezoelectric speaker |
| KR100698256B1 (en) * | 2004-07-16 | 2007-03-22 | 엘지전자 주식회사 | A Speaker Equipment using Display Window |
| US10974799B2 (en) | 2018-03-16 | 2021-04-13 | Taylor Made Group, Llc | Audio transducer attached to windshield or door |
| US20230367531A1 (en) * | 2020-10-07 | 2023-11-16 | Sony Group Corporation | Output apparatus |
-
1979
- 1979-12-27 JP JP17092179A patent/JPS6031433B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5693499A (en) | 1981-07-29 |
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