JPS63238798A - Ultrasonic ceramic microphone - Google Patents

Ultrasonic ceramic microphone

Info

Publication number
JPS63238798A
JPS63238798A JP7241187A JP7241187A JPS63238798A JP S63238798 A JPS63238798 A JP S63238798A JP 7241187 A JP7241187 A JP 7241187A JP 7241187 A JP7241187 A JP 7241187A JP S63238798 A JPS63238798 A JP S63238798A
Authority
JP
Japan
Prior art keywords
cylindrical case
open end
elastic adhesive
terminal plate
microphone
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
JP7241187A
Other languages
Japanese (ja)
Inventor
Nobuhiko Usuda
有須田 信彦
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 JP7241187A priority Critical patent/JPS63238798A/en
Publication of JPS63238798A publication Critical patent/JPS63238798A/en
Pending legal-status Critical Current

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Landscapes

  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To obtain a stable sensitivity-frequency characteristic by fixing the open end part of a cylindrical case to a recessed part, provided on a terminal block, through an elastic adhesive. CONSTITUTION:A piezo-electric porcelain plate 11 is stuck together inside the closed end plane 12a of the cylindrical case 12, and a bimorph vibrator is constituted. The recessed part 13a, for holding the open end part of the cylindrical case 12, is provided on the upper and outer circumference part of the terminal block 13, and the open end part of the cylindrical case 12 is fixed in the recessed part 13a through the elastic adhesive 16. Lead wires 14a, 14b connect between the electrode of the piezo-electric porcelain plate 11 and terminals 15a, 15b, studded on the terminal block 13.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、パーキングメータや自動車後方検知装置、距
離計として応用される超音波の送信・受信を行う超音波
セラミックマイクロホンに関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an ultrasonic ceramic microphone for transmitting and receiving ultrasonic waves, which is applied to parking meters, automobile rear detection devices, and distance meters.

従来の技術 従来、この種の超音波セラミックマイクロホンは第3図
及び第4図に示すような構成であった。
BACKGROUND OF THE INVENTION Conventionally, this type of ultrasonic ceramic microphone has been constructed as shown in FIGS. 3 and 4.

第3図、第4図において、1は圧電磁器板、2はアルミ
ニウム等からなる金属製片側閉端筒状ケースで、この筒
状ケース2の閉端部内側に圧電磁器板1を貼り合わせ、
バイモルフ振動子を構成する。
In FIGS. 3 and 4, 1 is a piezoelectric ceramic plate, 2 is a metallic one-side closed-end cylindrical case made of aluminum or the like, and the piezoelectric ceramic plate 1 is bonded to the inside of the closed end of this cylindrical case 2.
Construct a bimorph oscillator.

3は端子板で、前記筒状ケース2の開放部内側に弾性体
接着剤4を介して接着固定する。5aはリード線で、圧
電磁器板1の上面電極面と端子板3に植設された端子6
aをノ・ンダ付けで接続する。
Reference numeral 3 denotes a terminal plate, which is adhesively fixed to the inside of the open portion of the cylindrical case 2 via an elastic adhesive 4. 5a is a lead wire, and a terminal 6 is implanted in the upper electrode surface of the piezoelectric ceramic plate 1 and the terminal plate 3.
Connect a with a solder.

6bもリード線で、圧電磁器板1の下面電極と電気的に
結合している筒状ケース2と端子板3に植設された端子
6bをノ・ンダ付けで接続するものであった。
6b is also a lead wire, which connects the cylindrical case 2 electrically connected to the lower electrode of the piezoelectric ceramic plate 1 and the terminal 6b implanted in the terminal plate 3 by soldering.

発明が解決しようとする問題点 このような従来の構成では、筒状ケースの内5Jに端子
板を固定しているため、マイクロホンを使用する際に、
ケース側面をホルダーに強固に固定することによって、
筒状ケース振動面の振動状態が変化し、感度−周波数特
性が著しく低下するという問題があった。
Problems to be Solved by the Invention In such a conventional configuration, the terminal board is fixed to the inner 5J of the cylindrical case, so when using the microphone,
By firmly fixing the side of the case to the holder,
There was a problem in that the vibration state of the cylindrical case vibration surface changed and the sensitivity-frequency characteristics deteriorated significantly.

一方、筒状ケースはアルミニュウム等からなり、アルミ
ニュウムの熱膨張係数が大きいため、マイクロホンの感
度−周波数特注が使用環境温度変化に対して大きく変化
するという問題があった。
On the other hand, the cylindrical case is made of aluminum or the like, and since aluminum has a large coefficient of thermal expansion, there has been a problem in that the sensitivity-frequency customization of the microphone changes greatly with changes in the temperature of the environment in which it is used.

本発明はこのような間頂点を解決するもので、安定した
感度−周波数特性を得ることのできる信頼性の高いマイ
クロホンを提供することを目的とするものである。
The present invention solves this problem and aims to provide a highly reliable microphone that can obtain stable sensitivity-frequency characteristics.

間厘点を解決するための手段 この問題を解決するために本発明は、恒弾性材料からな
る片側閉端筒状ケースを保持するための四部を設けた端
子板の前記凹部に筒状ケースを弾性体接着剤を介して固
定したものである。
Means for Solving the Problem In order to solve this problem, the present invention provides a cylindrical case in the recess of the terminal plate, which is provided with four parts for holding a cylindrical case with one closed end made of a constant elastic material. It is fixed using an elastic adhesive.

作用 この構成により、筒状ケースがホルダーに固定されるこ
とがなく、端子板がホルダーに強固に固定されるため、
ホルダーからの振動及び衝撃は端子板及び弾性体接着剤
で完全に阻止されることになり、筒状ケースへ振動及び
衝撃が伝わることがないため、振動面の振動状態は全く
変化することがなく、安定した感度−周波数特性を得る
こととなる。−まだ、筒状ケースは熱膨張係数の小さい
恒弾性材料より構成されているため、使用環境温度変化
に対して、感度−周波数特性の変化の小さいものを得る
こととなる。
Effect: With this configuration, the cylindrical case is not fixed to the holder, and the terminal board is firmly fixed to the holder.
Vibrations and shocks from the holder are completely blocked by the terminal plate and elastic adhesive, and the vibrations and shocks are not transmitted to the cylindrical case, so the vibration state of the vibration surface does not change at all. , stable sensitivity-frequency characteristics can be obtained. - Since the cylindrical case is made of a constant modulus material with a small coefficient of thermal expansion, it is possible to obtain a sensitivity-frequency characteristic with small changes in response to changes in the operating environment temperature.

実施例 以下、本発明の一実施例について図面を参照しながら説
明する。第1図は本発明の一実施例による超音波セラミ
ックマイクロホンの斜視図であり、第2図は本発明の一
実施例による超音波セラミックマイクロホンの断面図で
ある。第1図、第2図において、11は圧電磁器板、1
2は開端部(振動面)12aを有し恒弾性材料からなる
片側閉端筒状ケースである。前記筒状ケース12の閉端
面12aの内側に前記圧電磁器板11を貼り合わせ。
EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an ultrasonic ceramic microphone according to an embodiment of the present invention, and FIG. 2 is a sectional view of an ultrasonic ceramic microphone according to an embodiment of the present invention. In FIGS. 1 and 2, 11 is a piezoelectric ceramic plate;
Reference numeral 2 denotes a cylindrical case with an open end (vibration surface) 12a and a closed end made of a constant elastic material. The piezoelectric ceramic plate 11 is bonded to the inside of the closed end surface 12a of the cylindrical case 12.

バイモルフ振動子を構成する。13は端子板で、この端
子板13の上面外周部に前記筒状ケース12の開端部を
保持するために凹部13aが設けられており、この凹部
13aに弾性体接着剤16を介して前記筒状ケース12
の開端部が固定される。
Construct a bimorph oscillator. Reference numeral 13 denotes a terminal plate, and a recess 13a is provided on the outer periphery of the upper surface of the terminal plate 13 to hold the open end of the cylindrical case 12. Case 12
The open end of is fixed.

14aはリード線で圧電磁器板11と端子板13に植設
された端子15aをハンダ付けで接続する。
A lead wire 14a connects the piezoelectric ceramic plate 11 and the terminal 15a implanted in the terminal plate 13 by soldering.

14bもリード線で、圧電磁器板11の下面電極と電気
的に結合している筒状ケース12と端子板13に植設さ
れた端子15bをハンダ付けで接続する。
14b is also a lead wire, and the cylindrical case 12 electrically connected to the lower electrode of the piezoelectric ceramic plate 11 and the terminal 15b implanted in the terminal plate 13 are connected by soldering.

以上のように本実施例によれば端子板13の上面外周部
に凹部13aを設け、この凹部13aに弾性体接着剤1
6を介して筒状ケース12の開端部が固定されるため、
筒状ケース12がマイクロホンホルダーに固定されるこ
とがなく、端子板13がホルダーに強固に固定されるだ
め、ホルダーからの振動及び衝撃は端子板13及び弾性
体接着剤16で完全に阻止されることになり、筒状ケー
ス12へ振動及び衝撃が伝わることがないため、振動面
の振動状態は全く変化することがなく、安定した感度−
周波数特性を得ることとなる。また、筒状ケース12は
熱膨張係数の小さい恒弾性材料により構成されているた
め、使用環境温度変化に対して、感度−周波数特性の変
化の小さいものを得ることができる。
As described above, according to this embodiment, the recess 13a is provided on the outer periphery of the upper surface of the terminal board 13, and the elastic adhesive 1 is applied to the recess 13a.
Since the open end of the cylindrical case 12 is fixed via the
Since the cylindrical case 12 is not fixed to the microphone holder and the terminal plate 13 is firmly fixed to the holder, vibrations and shocks from the holder are completely blocked by the terminal plate 13 and the elastic adhesive 16. Therefore, since vibrations and shocks are not transmitted to the cylindrical case 12, the vibration state of the vibrating surface does not change at all, resulting in stable sensitivity.
Frequency characteristics will be obtained. In addition, since the cylindrical case 12 is made of a constant elastic material with a small coefficient of thermal expansion, it is possible to obtain a sensitivity-frequency characteristic with small changes in response to changes in the operating environment temperature.

発明の効果 以上のように本発明によれば、恒弾性材料からなる片側
閉端筒状ケースを保持するための四部を設けた端子板の
凹部に、弾性体接着剤を介して筒状ケースの開端部を固
定することにより、端子板がホルダーに強固に固定され
、ホルダーからの振動及び衝撃は筒状ケースへ伝わるこ
とがなくなるため、安定した感度−周波数特性を得るこ
とができる。また、筒状ケースは熱膨張係数の小さい恒
弾性材料により構成されているため、使用環境温度変化
に対して、感度−周波数特性変化を小さくすることがで
きるという効果が得られる。
Effects of the Invention As described above, according to the present invention, the cylindrical case is inserted into the concave portion of the terminal plate provided with four parts for holding the cylindrical case with one closed end made of a constant elastic material through an elastic adhesive. By fixing the open end, the terminal plate is firmly fixed to the holder, and vibrations and shocks from the holder are not transmitted to the cylindrical case, so stable sensitivity-frequency characteristics can be obtained. Furthermore, since the cylindrical case is made of a constant modulus material with a small coefficient of thermal expansion, it is possible to reduce changes in sensitivity-frequency characteristics with respect to changes in the operating environment temperature.

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

第1図は本発明の一実施例による超音波セラミックマイ
クロホンを示す斜視図、第2図は本発明の一実施例によ
る超音波セラミックマイクロホンを示す断面図、第3図
は従来の超音波セラミックマイクロホンを示す斜視図、
第4図は従来の超音波セラミックマイクロホンを示す断
面図である。 11・・・・・・圧電磁器板、12・・・・・筒状ケー
ス、12a・・・・・閉端面、13・・・・・・端子板
、13a・・・・四部、14a 、 14b−・・−リ
ード線、15a。 15b・・・・・端子、16・・・・・弾性体接着剤。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名11
−亙亀ミIシ仮 1?−−一箇仄グース 1211−関昂m /3−一一端か仮 13久−−−凹部 第2図 1、s之!、Sb
FIG. 1 is a perspective view showing an ultrasonic ceramic microphone according to an embodiment of the present invention, FIG. 2 is a sectional view showing an ultrasonic ceramic microphone according to an embodiment of the present invention, and FIG. 3 is a conventional ultrasonic ceramic microphone. A perspective view showing
FIG. 4 is a sectional view showing a conventional ultrasonic ceramic microphone. DESCRIPTION OF SYMBOLS 11... Piezoelectric ceramic plate, 12... Cylindrical case, 12a... Closed end surface, 13... Terminal board, 13a... Four parts, 14a, 14b ---Lead wire, 15a. 15b...Terminal, 16...Elastic adhesive. Name of agent: Patent attorney Toshio Nakao and 1 other person11
-Kou Kamimi Ishi Kari 1? --Ichikagoose 1211-Kankom /3-One end or provisional 13 years---Concave part Fig. 2 1, s! , Sb

Claims (1)

【特許請求の範囲】[Claims]  恒弾性材料からなる片側閉端筒状ケースの閉端部内側
に圧電磁器板を貼り合わせて振動子を構成し、前記筒状
ケースを保持するための凹部を設けた端子板と、前記凹
部と前記筒状ケースとを弾性体接着剤を用いて固定する
ことを特徴とする超音波セラミックマイクロホン。
A piezoelectric ceramic plate is bonded to the inside of the closed end of a one-side closed-end cylindrical case made of a constant elastic material to form a vibrator, and a terminal plate is provided with a recess for holding the cylindrical case, and the recess is connected to the terminal plate. An ultrasonic ceramic microphone characterized in that the cylindrical case is fixed to the cylindrical case using an elastic adhesive.
JP7241187A 1987-03-26 1987-03-26 Ultrasonic ceramic microphone Pending JPS63238798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7241187A JPS63238798A (en) 1987-03-26 1987-03-26 Ultrasonic ceramic microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7241187A JPS63238798A (en) 1987-03-26 1987-03-26 Ultrasonic ceramic microphone

Publications (1)

Publication Number Publication Date
JPS63238798A true JPS63238798A (en) 1988-10-04

Family

ID=13488513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7241187A Pending JPS63238798A (en) 1987-03-26 1987-03-26 Ultrasonic ceramic microphone

Country Status (1)

Country Link
JP (1) JPS63238798A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5842400A (en) * 1981-09-04 1983-03-11 Matsushita Electric Ind Co Ltd Ultrasonic wave ceramic microphone

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5842400A (en) * 1981-09-04 1983-03-11 Matsushita Electric Ind Co Ltd Ultrasonic wave ceramic microphone

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