JPS60199298A - Piezoelectric acoustic transducer - Google Patents
Piezoelectric acoustic transducerInfo
- Publication number
- JPS60199298A JPS60199298A JP5669984A JP5669984A JPS60199298A JP S60199298 A JPS60199298 A JP S60199298A JP 5669984 A JP5669984 A JP 5669984A JP 5669984 A JP5669984 A JP 5669984A JP S60199298 A JPS60199298 A JP S60199298A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric
- insulating
- cover
- terminal
- piezoelectric vibrator
- 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
Links
- 239000002184 metal Substances 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 17
- 239000011889 copper foil Substances 0.000 abstract description 17
- 239000000919 ceramic Substances 0.000 abstract description 10
- 238000005476 soldering Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000013016 damping Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 210000002784 stomach Anatomy 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
Abstract
Description
【発明の詳細な説明】
本発明は、電話用送受話器などに用いる圧電音響変換装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric acoustic transducer used in telephone handsets and the like.
このような電話用圧電音響変換装置は、圧電振動子の前
後側にそれぞれ空気室を設ける３自由度の振動系にする
必要があり、しかも保守、交換の必要性からコネクタ形
式の端子が多く採用され、例えば第１図に示すように構
成されている。第１図において、金属板に圧電セラミッ
ク素子を貼り合わせたユニモルフ構造の圧電振動子１が
金属ケース２内の段差部に配置され、この圧電振動子１
上に絶縁性の支持リング３を介在させてカバー４が取り
付けられ、ケース開口端部がカバー４の外側面にカシメ
固定され、これによって圧電振動子１がその外周部でケ
ース２とリング３によって挟持固定されている。カバー
４には、１対の外部端子５，６が挿入固定され、ケース
２内において、圧電振動子１の金属板に半田接続されて
いるリード線が一方の端子５に半田接続され、圧電セラ
ミック素子の電極に半田接続されているもう一方のリー
ド線が他方の端子６に半田接続されている。さらにカバ
ー４には制動孔７が形成されており、ここのように構成
した圧電音響変換装置は、外部端子５．６に音声信号が
印加されると、圧電振動子１が屈曲振動し、ケース２の
放音孔から音声が発生し、受話器が構成される。逆に、
放音孔を通して音声が圧電振動子１に加わると、圧電振
動子１が屈曲振動し、外部端子５．６に電気信号が取り
出され、送話器が構成される。Such piezoelectric acoustic transducers for telephones require a three-degree-of-freedom vibration system with air chambers on the front and rear sides of the piezoelectric vibrator, and connector-type terminals are often used due to the need for maintenance and replacement. For example, it is configured as shown in FIG. In FIG. 1, a piezoelectric vibrator 1 having a unimorph structure in which a piezoelectric ceramic element is bonded to a metal plate is placed at a step in a metal case 2.
A cover 4 is attached to the top with an insulating support ring 3 interposed therebetween, and the open end of the case is caulked and fixed to the outer surface of the cover 4, so that the piezoelectric vibrator 1 is held at its outer periphery by the case 2 and the ring 3. It is clamped and fixed. A pair of external terminals 5 and 6 are inserted and fixed into the cover 4, and within the case 2, a lead wire that is soldered to the metal plate of the piezoelectric vibrator 1 is soldered to one terminal 5, and the piezoelectric ceramic The other lead wire, which is soldered to the electrode of the element, is soldered to the other terminal 6. Furthermore, a brake hole 7 is formed in the cover 4, and in the piezoelectric acoustic transducer configured in this way, when an audio signal is applied to the external terminal 5.6, the piezoelectric vibrator 1 bends and vibrates. Sound is generated from the sound emitting hole 2, and a receiver is configured. vice versa,
When sound is applied to the piezoelectric vibrator 1 through the sound emitting hole, the piezoelectric vibrator 1 bends and vibrates, and an electric signal is taken out to the external terminal 5.6, thereby forming a transmitter.
ところが、上述した圧電音響変換装置を組立てるにあた
って、内部配線は半田付けにより結線しなければならず
、しかも、信頼性向上のため外部端子にリード線を巻き
付けてから半田付けしなければならないので、作業性が
悪く、コスト高の要因になっている。However, when assembling the piezoelectric acoustic transducer described above, the internal wiring must be connected by soldering, and furthermore, in order to improve reliability, the lead wire must be wrapped around the external terminal before soldering. This results in poor performance and high costs.
また、半田点の高さは通常１１程度必要であり、このた
め次のような問題点もある。つまり、電話器用圧電音響
変換装置は、その周波数特性を平坦にするため、３自由
度の振動系で構成されており、その前室および後苗の容
積はその共振点のＱを低下させるためにできる限り小さ
い方が好ましいが、後室には両側から１１前後の半田点
が存在するので余り小さくすることはできない。したが
って、共振点のＱの低下ひいては周波数特性の平坦化に
限界が生ずる。Further, the height of the solder point is normally required to be about 11 mm, which causes the following problems. In other words, the piezoelectric acoustic transducer for telephones is composed of a vibration system with three degrees of freedom in order to flatten its frequency characteristics, and the volumes of the front chamber and rear seedling are designed to lower the Q of the resonance point. It is preferable to make it as small as possible, but since there are about 11 solder points on both sides of the rear chamber, it cannot be made too small. Therefore, there is a limit to the reduction in the Q of the resonance point and the flattening of the frequency characteristics.
上述した圧電音響変換装置の欠点を除去するには、外部
端子にバネ接点を一体に形成したバネ接触端子を用いる
方法が考えられるが、この方法にも次のような欠点があ
る。つまり、電話器用圧電音響変換装置の場合、使用す
る周波数範囲が３００〜３４００１−Ｉ Ｚと低いため
、１００μ以下の非常に厚みの薄い圧電セラミック素子
や金属板を使用する必要があり、バネ圧力の小さいソフ
トなバネ接触端子を用いなければならない。ところが、
外部端子としては、コネクタとして利用されたり、半田
付けされたりするので、比較的強固なものでなければな
らず、端子の板厚は０．４ｉｍ以上必要であり、この厚
みではソフトなバネ接触端子を実現することはできない
。In order to eliminate the drawbacks of the piezoelectric acoustic transducer described above, it is possible to use a spring contact terminal in which a spring contact is integrally formed with the external terminal, but this method also has the following drawbacks. In other words, in the case of piezoelectric acoustic transducers for telephones, the frequency range used is as low as 300 to 34001-IZ, so it is necessary to use extremely thin piezoelectric ceramic elements or metal plates with a thickness of 100μ or less, which reduces the spring pressure. Small soft spring contact terminals must be used. However,
As external terminals are used as connectors or soldered, they must be relatively strong, and the thickness of the terminal needs to be at least 0.4 mm; this thickness makes it difficult to use soft spring contact terminals. cannot be realized.
本発明は、上述した従来にお一部るいろいろな欠点を除
去したものであり、内部配線に半田付は処理が不要で、
組立が極めて簡単であり、しかも外部端子として強固な
端子を用いることのできる圧電音響変換装置を提供する
ことを目的とする。The present invention eliminates the various drawbacks of the prior art described above, and does not require soldering to internal wiring.
It is an object of the present invention to provide a piezoelectric acoustic transducer that is extremely easy to assemble and can use strong terminals as external terminals.
以下、本発明の実施例を図面を参照しつつ詳述する。Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図〜第６図は第１の実施例を示し、同図において、
１０は金属ケース、２０は圧電振動子、３０は介挿部材
としての支持リング、４０はバネ端子、５０は絶縁性カ
バー、Ｓｌ、６２は外部端子である。FIG. 2 to FIG. 6 show the first embodiment, and in the same figure,
10 is a metal case, 20 is a piezoelectric vibrator, 30 is a support ring as an insertion member, 40 is a spring terminal, 50 is an insulating cover, Sl, and 62 are external terminals.
金属ケース１０には放音孔１１と段差１２が形成され、
ケース１０内において段差１２上に圧電振動子２０が配
置されている。この圧電振動子２０は、金属板（板厚−
約０．１ｍＩｍ）２１に圧電セラミック素子（板厚−約
０．１ｍ５） ２２を接養したユニモルフ振動子で構成
され、圧電セラミック素子２２側がケース１０の開口側
に向くように、かつ金属板２１の外周部がケース１０の
段差１２に接触するように配置され、段差１２によって
、放音孔１１側にケース１０と圧電振動子２０との間で
第１の空気室１０が構成されている。支持リング３０は
、第３図に示すように、樹脂で構成された、厚みが約０
゜８Ｉｌ１１１程度の半円形状の絶縁性部分３１と、金
属で構成された、同じく厚みが約０．８ｍｍ程度の半円
形状の導電性部分３２とで構成され、これらの部分３１
．３２を組合せて円形状の支持リング３０が構成されて
いる。支持リング３０の絶縁性部分３１にはその外周部
の一部に切欠き３３が設けられ、この切欠き３３の部分
にバネ端子４０が取り付けられている。このバネ端子４
０は、接点部４１と取付けＶ４２からなり、ステンレス
、リン青銅などのバネ材料からなる薄板（板厚−約０．
０５ｎ＋ｍ ）をプレス成形して形成されている。バネ
端子４０は、第４．５図に示すように、その取付は部４
２の折曲げ片を支持リング３０の絶縁性部分３１の切欠
いた残りの細い部分に嵌合して仮固定されている。カバ
ー５０はプリント基板で構成され、第６図に示すように
一対の外部端子取付は孔５１．５２および制動孔５３が
形成されており、その一方面には、各端子取付は孔５１
．５２の周囲からそれぞれカバー５０の外周部にのびる
銅箔パターン５４．５５が形成されており、その一方面
上に制動孔５３を慣う制動Ｈ５６が貼着されている。カ
バー５０の端子取付は孔５１．５２にはそれぞれ外部端
子６１．６２が挿入固定され、一方の端子が第１の銅箔
パターン５４に、他方の端子が第２の銅箔パターン５５
に電気的に接続されている。そして、支持リング３０が
、バネ端子４０の接点部４１を圧電セラミック素子２２
の電極にバネ接触させ、かつ圧電振動子２０の外周部を
ケース１０の段差１２との間で挟み込むようにしてケー
ス１０内に収納され、その上にカバー５０が収納され、
ケース１０の開口端部がカバー５０の外側面に向かって
カシメ固定されている。A sound emitting hole 11 and a step 12 are formed in the metal case 10,
A piezoelectric vibrator 20 is arranged on a step 12 within the case 10. This piezoelectric vibrator 20 is made of a metal plate (thickness -
It is composed of a unimorph resonator in which a piezoelectric ceramic element (plate thickness - approximately 0.1 m5) 22 is attached to a piezoelectric ceramic element (approximately 0.1 mIm) 21, and the metal plate 21 is arranged so that the piezoelectric ceramic element 22 side faces the opening side of the case 10. is arranged so that the outer circumference of the piezoelectric vibrator 20 contacts a step 12 of the case 10, and the step 12 forms a first air chamber 10 between the case 10 and the piezoelectric vibrator 20 on the sound emission hole 11 side. As shown in FIG. 3, the support ring 30 is made of resin and has a thickness of about 0.
It is composed of a semicircular insulating part 31 of about 8Il111 and a semicircular conductive part 32 made of metal and also having a thickness of about 0.8 mm.
．． 32 are combined to form a circular support ring 30. The insulating portion 31 of the support ring 30 is provided with a notch 33 in a part of its outer periphery, and a spring terminal 40 is attached to the notch 33. This spring terminal 4
0 consists of a contact part 41 and a mounting V42, and is a thin plate (thickness - about 0.0 mm) made of a spring material such as stainless steel or phosphor bronze.
05n+m) is press-molded. The spring terminal 40 is attached to the portion 4 as shown in Fig. 4.5.
The bent piece No. 2 is fitted into the thin remaining cutout portion of the insulating portion 31 of the support ring 30 and temporarily fixed. The cover 50 is composed of a printed circuit board, and as shown in FIG. 6, a pair of external terminal mounting holes 51 and 52 and a braking hole 53 are formed, and on one side, each terminal mounting hole 51 and a brake hole 53 are formed.
．． Copper foil patterns 54 and 55 are formed extending from the periphery of each of the copper foil patterns 54 and 55 to the outer circumference of the cover 50, and a brake H56 that fits into the brake hole 53 is pasted on one side of the copper foil patterns 54 and 55, respectively. For terminal attachment of the cover 50, external terminals 61 and 62 are inserted and fixed into the holes 51 and 52, respectively, one terminal is attached to the first copper foil pattern 54, and the other terminal is attached to the second copper foil pattern 55.
electrically connected to. Then, the support ring 30 connects the contact portion 41 of the spring terminal 40 to the piezoelectric ceramic element 22.
The piezoelectric vibrator 20 is housed in the case 10 in such a manner that the piezoelectric vibrator 20 is in spring contact with the electrode, and the outer peripheral part of the piezoelectric vibrator 20 is sandwiched between the step 12 of the case 10, and the cover 50 is housed thereon.
The open end of the case 10 is caulked and fixed toward the outer surface of the cover 50.
全体をカシメ固定した状態で、圧電振動子２０がケース
１０の段差１２と支持リング３０との間で挟持され、バ
ネ端子４０が支持リング３０とカバー５０との間で挟持
されている。また、カバー５０の第１の銅箔パターン５
４がバネ端子４０に、第２の銅箔パターン５５が支持リ
ング３０の導電性部分３２に電気的に接続されることに
なる。この結果、一方の外部端子６１は銅箔パターン５
４およびバネ端子４０を通して圧電セラミック素子２２
の電極に、他方の外部端子が銅箔パターン５５、支持リ
ング３０の導電性部分３２および金属板２１を通して圧
電セラミック素子２２のもう一方の電極に電気的に接続
されることになる。また、圧電振動子２０とカバー５０
との間には支持リング３０の厚み分の高さをもつ第２の
空気室８０が形成され、第１の空気室７０および圧電振
動子２０とともに、３自由度の振動系が構成されること
になる。With the entire structure fixed by caulking, the piezoelectric vibrator 20 is held between the step 12 of the case 10 and the support ring 30, and the spring terminal 40 is held between the support ring 30 and the cover 50. In addition, the first copper foil pattern 5 of the cover 50
4 will be electrically connected to the spring terminal 40, and the second copper foil pattern 55 will be electrically connected to the conductive portion 32 of the support ring 30. As a result, one external terminal 61 is connected to the copper foil pattern 5.
4 and the piezoelectric ceramic element 22 through the spring terminal 40.
The other external terminal is electrically connected to the other electrode of the piezoelectric ceramic element 22 through the copper foil pattern 55, the conductive portion 32 of the support ring 30, and the metal plate 21. In addition, the piezoelectric vibrator 20 and the cover 50
A second air chamber 80 having a height equivalent to the thickness of the support ring 30 is formed between the first air chamber 70 and the piezoelectric vibrator 20 to form a three-degree-of-freedom vibration system. become.
本実施例によれば、内部配線に半田付は処理が不要にな
るので、組立が非常に簡単になるとともに、支持リング
の厚み０．８ｍｌ程度の高さをもつ、小さな容積の空気
室が形成できて低Ｑ化がはかれ、平坦な周波数特性を実
現することができる。しかも、外部端子はコネクタ端子
としても利用できる、強固な端子に構成できる。According to this embodiment, since there is no need to solder the internal wiring, assembly is extremely simple, and a small volume air chamber with a height of approximately 0.8 ml in thickness of the support ring is formed. As a result, it is possible to achieve low Q and flat frequency characteristics. Moreover, the external terminal can be constructed into a strong terminal that can also be used as a connector terminal.
第１図、第８図および第９図はそれぞれ支持リング３０
の変形例を示し、第７図のものは絶縁性樹脂のリング体
の半分に金属メッキ３５が施されたもので、金属メッキ
の施されていない絶縁性部分３４に上記実施例と同様に
バネ端子４０が取り付けられ、金属メッキの施された導
電性部分３５によって上記実施例と同様に圧電振動子２
０の金属板２１とカバー５０の銅箔パターン５５とが導
通されるようにしたものである。第８図は、金属製のリ
ング体の半分に絶縁１Ｉ３６をコーティングすることに
より、絶縁性部分３６と導電性部分３７を構成したもの
で、圧電音響変換装置へ組込んだ状態は第７図記載のも
のと同様であるから、その説明を省略する。第９図は、
絶縁性のリング体３８にコ字状金属端子３９を嵌め込ん
だもので、コ字状金属端子３９が圧電撮動子２０の金属
板２１とカバー５０の銅箔パターン５５との間に介挿さ
れ、それらを導通させるようにしたものである。1, 8 and 9 show support ring 30, respectively.
Fig. 7 shows a modification example in which half of the insulating resin ring body is plated with metal 35, and the insulating part 34 that is not plated with metal is provided with a spring as in the above embodiment. A terminal 40 is attached, and the piezoelectric vibrator 2 is connected to the metal-plated conductive portion 35 in the same manner as in the above embodiment.
The metal plate 21 of No. 0 and the copper foil pattern 55 of the cover 50 are electrically connected to each other. Figure 8 shows an insulating part 36 and a conductive part 37 formed by coating half of a metal ring body with insulation 1I36, and the state in which it is incorporated into a piezoelectric acoustic transducer is shown in Figure 7. Since it is the same as that of , its explanation will be omitted. Figure 9 shows
A U-shaped metal terminal 39 is fitted into an insulating ring body 38, and the U-shaped metal terminal 39 is inserted between the metal plate 21 of the piezoelectric sensor 20 and the copper foil pattern 55 of the cover 50. It is designed to make them conductive.
第１０図はさらに他の実施例の部分断面図を示し、上記
実施例との相違点は、支持リング３０として絶縁性のリ
ング体を用い、カバー５０には銅箔パターン５５の代わ
りに外側面に銅箔パターン５５′を形成し、金属ケース
１０の開口端をカシメ固定したときそのカシメ部分を銅
箔パターン５５−に導通させることにより、圧電振動子
２０の金属板２１を、金属ケース１０および銅箔パター
ン５５′を通して外部端子６２に電気的に接続したこと
にある。他の構成は上記実施例とほぼ同様であるからそ
の説明を省略する。なお、上記各実施例においては介挿
部材としてリング体を用いているが、部分的に欠落した
リング体を用いるようにしてもよい。FIG. 10 shows a partial sectional view of still another embodiment, and the difference from the above embodiment is that an insulating ring body is used as the support ring 30, and the cover 50 has an outer surface instead of a copper foil pattern 55. A copper foil pattern 55' is formed on the metal case 10, and when the open end of the metal case 10 is caulked and fixed, the caulked portion is electrically connected to the copper foil pattern 55-, thereby connecting the metal plate 21 of the piezoelectric vibrator 20 to the metal case 10 and It is electrically connected to the external terminal 62 through the copper foil pattern 55'. The other configurations are almost the same as those of the above embodiment, so the explanation thereof will be omitted. In addition, in each of the above embodiments, a ring body is used as the insertion member, but a partially missing ring body may be used.
第１図は従来の圧電音響変換￥Ｒ胃の断面図、第２図〜
第６図は本発明による圧電変換装回の一実施例を示し、
第２図は断面図、第３図は支持リングの平面図、第４図
は主要部の分解斜視図、第５例を示す平面図、第零図は
他の実施例を示す部分断面図である。
１０は金属ケース、２０は圧電振動子、３０Ｌよ支持リ
ング、４０はバネ端子、５０はカバー、６１．６２は外
部端子である。
特 訂 出 願 人
株式会社村田製作所
某 ｌ 図
纂２ＵｊＵ
１３ 図 箋６０
３０ ｆＯ
筆４図
箪７図
〃
ｓ８図
繁ｌθ団Figure 1 is a cross-sectional view of the stomach using conventional piezoelectric acoustic conversion, Figure 2~
FIG. 6 shows an embodiment of a piezoelectric transducer according to the present invention,
Fig. 2 is a sectional view, Fig. 3 is a plan view of the support ring, Fig. 4 is an exploded perspective view of the main parts, a plan view showing the fifth example, and Fig. 0 is a partial sectional view showing another example. be. 10 is a metal case, 20 is a piezoelectric vibrator, 30L is a support ring, 40 is a spring terminal, 50 is a cover, and 61.62 are external terminals. Special revision applicant: Murata Manufacturing Co., Ltd. l Illustration 2UjU 13 Illustrated paper 60 30 fO Brush 4 drawing 7 drawing s8 drawing traditional lθ group
Claims (1)
とを重ねあわせた圧電振動子を用い、この圧電振動子の
両側に空気室を形成した圧電音響変換装置であって、 圧電振動子が圧電素子をケース間口側に向けてケース内
に配置され、少なくとも一部が絶縁性をもつほぼリング
状の介挿部材を圧電振動子の金属板との間に介在８せて
絶縁カバーが配置され、介挿部材の絶縁性部分と絶縁カ
バーとの間に挟持されたバネ端子を通して、圧電素子の
電極が絶縁カバー上の導電部に電気的に接続されるとと
もに、その導電部が絶縁カバーに取り付けられた外部端
子に電気的に接続されたことを特徴とする圧電音響変換
装置。[Claims] A piezoelectric acoustic transducer using a piezoelectric vibrator in which a metal plate and a piezoelectric element having a smaller shape than the metal plate are stacked, and air chambers are formed on both sides of the piezoelectric vibrator. , the piezoelectric vibrator is placed in the case with the piezoelectric element facing the front side of the case, and a substantially ring-shaped insertion member having at least a portion of insulation is interposed 8 between the piezoelectric vibrator and the metal plate. An insulating cover is arranged, and the electrode of the piezoelectric element is electrically connected to the conductive part on the insulating cover through the spring terminal sandwiched between the insulating part of the insertion member and the insulating cover, and the conductive part A piezoelectric acoustic transducer characterized in that the is electrically connected to an external terminal attached to an insulating cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5669984A JPS60199298A (en) | 1984-03-23 | 1984-03-23 | Piezoelectric acoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5669984A JPS60199298A (en) | 1984-03-23 | 1984-03-23 | Piezoelectric acoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60199298A true JPS60199298A (en) | 1985-10-08 |
Family
ID=13034709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5669984A Pending JPS60199298A (en) | 1984-03-23 | 1984-03-23 | Piezoelectric acoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60199298A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2643772A1 (en) * | 1989-02-27 | 1990-08-31 | Horlogerie Photograph Fse | PIEZOELECTRIC CAPSULE WITH FLAT RANGE AND ELASTIC HOLDING DEVICES |
| FR2643771A1 (en) * | 1989-02-27 | 1990-08-31 | Horlogerie Photograph Fse | PIEZOELECTRIC CAPSULE WITH CONDUCTIVE ELASTIC HOLDING COMPONENTS |
| WO1990014737A1 (en) * | 1989-05-15 | 1990-11-29 | Alcatel Dial Face S.P.A. | Piezoceramic transducer for telephone instruments |
| EP0432546A2 (en) * | 1989-12-15 | 1991-06-19 | Siemens Aktiengesellschaft | Piezoelectric transducer unit for telephone sets |
| EP0456968A2 (en) * | 1990-05-14 | 1991-11-21 | Alcatel Dial Face S.P.A. | Piezoelectric transducer |
| US5371428A (en) * | 1992-10-27 | 1994-12-06 | Tdk Corporation | Piezoelectric transducer |
-
1984
- 1984-03-23 JP JP5669984A patent/JPS60199298A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2643772A1 (en) * | 1989-02-27 | 1990-08-31 | Horlogerie Photograph Fse | PIEZOELECTRIC CAPSULE WITH FLAT RANGE AND ELASTIC HOLDING DEVICES |
| FR2643771A1 (en) * | 1989-02-27 | 1990-08-31 | Horlogerie Photograph Fse | PIEZOELECTRIC CAPSULE WITH CONDUCTIVE ELASTIC HOLDING COMPONENTS |
| WO1990014737A1 (en) * | 1989-05-15 | 1990-11-29 | Alcatel Dial Face S.P.A. | Piezoceramic transducer for telephone instruments |
| EP0432546A2 (en) * | 1989-12-15 | 1991-06-19 | Siemens Aktiengesellschaft | Piezoelectric transducer unit for telephone sets |
| EP0456968A2 (en) * | 1990-05-14 | 1991-11-21 | Alcatel Dial Face S.P.A. | Piezoelectric transducer |
| US5371428A (en) * | 1992-10-27 | 1994-12-06 | Tdk Corporation | Piezoelectric transducer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5784340A (en) | Piezoelectric acoustic device | |
| EP0456968A2 (en) | Piezoelectric transducer | |
| JP3824185B2 (en) | Piezoacoustic transducer | |
| EP1699258B1 (en) | Electro-acoustic transducer with holder | |
| US5907625A (en) | Piezoelectric element and piezoelectric acoustic device | |
| JP4237188B2 (en) | Electret condenser microphone with double base structure | |
| JPS60199298A (en) | Piezoelectric acoustic transducer | |
| JP3456042B2 (en) | Electroacoustic transducer | |
| JPS6133508B2 (en) | ||
| JPS6098795A (en) | Piezo-electric electroacoustic transducer | |
| JPH0411398Y2 (en) | ||
| JPS596064Y2 (en) | piezoelectric sounding body | |
| JPH0134479Y2 (en) | ||
| JP3309682B2 (en) | Piezoelectric sounding body | |
| JP2522202Y2 (en) | Electroacoustic transducer | |
| JPH0523698U (en) | Electret condenser microphone unit | |
| JPH0546395Y2 (en) | ||
| JP2006060373A (en) | Condenser microphone | |
| JPS6022717Y2 (en) | Piezoelectric electroacoustic transducer | |
| JP3044460U (en) | Piezoelectric acoustic components and devices | |
| JP2003169395A (en) | Microphone | |
| JPS6014600A (en) | Transmitter and receiver | |
| JP3531261B2 (en) | Speaker | |
| JP2921297B2 (en) | Electroacoustic transducer | |
| JPH0453115Y2 (en) |