JPH02243098A - Ultrasonic wave ceramic microphone - Google Patents
Ultrasonic wave ceramic microphoneInfo
- Publication number
- JPH02243098A JPH02243098A JP6450389A JP6450389A JPH02243098A JP H02243098 A JPH02243098 A JP H02243098A JP 6450389 A JP6450389 A JP 6450389A JP 6450389 A JP6450389 A JP 6450389A JP H02243098 A JPH02243098 A JP H02243098A
- Authority
- JP
- Japan
- Prior art keywords
- case
- terminal board
- vibration
- vibration case
- outer peripheral
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、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 that transmits and receives ultrasonic waves.
従来の技術
従来この種の超音波セラミックマイクロボンは、第２図
に示すような構成であった。第２図において、振動ケー
ス１は筒状の側部と円錐台形状の底部とを有し、この振
動ケース１の底面内側には圧電磁器振動子２が貼合わせ
られて振動部が構成され、振動ケース１の内側部には外
圧保護として内リング３が配置されているとともに断面
凸状の緩衝部材４を介して振動ケース１の下部開孔端に
端子板６が挿入され、この端子板６と振動ケース１との
間を弾性接着剤５で密閉してなる梢成であった。圧電磁
器振動子２の画電極部と端子８．９とはリード線７によ
り電気接続されている。2. Description of the Related Art Conventionally, this type of ultrasonic ceramic microbon has a structure as shown in FIG. In FIG. 2, a vibration case 1 has a cylindrical side part and a truncated conical bottom part, and a piezoelectric ceramic vibrator 2 is bonded to the inside of the bottom surface of the vibration case 1 to form a vibrating part. An inner ring 3 is arranged inside the vibration case 1 to protect against external pressure, and a terminal plate 6 is inserted into the lower open end of the vibration case 1 via a buffer member 4 having a convex cross section. The structure was formed by sealing the space between the vibration case 1 and the vibration case 1 with an elastic adhesive 5. The picture electrode portion of the piezoelectric ceramic vibrator 2 and the terminal 8.9 are electrically connected by a lead wire 7.
発明が解決しようとする課題
しかしながら、このような従来の構成では、部品点数が
多く、組立能率が良好でないという課題があった。Problems to be Solved by the Invention However, such a conventional configuration has a problem in that the number of parts is large and assembly efficiency is not good.
本発明は上記課題を解決するもので、部品点数を削減し
て組立能率を良くした超音波セラミックマイクロホンを
提供することを目的とするものである。The present invention has been made to solve the above problems, and it is an object of the present invention to provide an ultrasonic ceramic microphone that reduces the number of parts and improves assembly efficiency.
課題を解決するための手段
上記課題を解決するために、本発明は、円錐台形状の振
動ケースを用い、この振動ケースの内底面に圧電磁器振
動子を貼合わせて振動部を梢成し、前記振動ケースの斜
面に当接する筒状固定部と振動ケース外周端を内部に充
填した弾性接着剤により密封固定する凹部とを有してな
る端子板で振動ケースを支持する構成にしたものである
。Means for Solving the Problems In order to solve the above problems, the present invention uses a truncated cone-shaped vibration case, and forms a vibrating part by bonding a piezoelectric ceramic vibrator to the inner bottom surface of the vibration case. The vibration case is supported by a terminal plate having a cylindrical fixing part that comes into contact with the slope of the vibration case, and a recess that seals and fixes the outer peripheral end of the vibration case with an elastic adhesive filled inside. .
作用
上記構成により、振動ケースを、端子板上に設けた筒状
固定部と凹部で支持することにより、組立能率が良好と
なるとともに、端子板外周端より内側に振動ケースを配
置することとなるなめ、外“周支持圧力は端子板だけに
加わり、振動抑制を受けないこととなる。Effect: With the above configuration, the vibration case is supported by the cylindrical fixing part and the recess provided on the terminal plate, which improves assembly efficiency and allows the vibration case to be placed inside the outer peripheral edge of the terminal plate. The outer periphery support pressure is applied only to the terminal plate, and vibration is not suppressed.
実施例 以下、本発明の一実施例を図面に基づき説明する。Example Hereinafter, one embodiment of the present invention will be described based on the drawings.
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
クロホンの断面図である。第１図に示すように、振動ケ
ース１０は円錐台形状とされ、この振動ケース１０の内
底面には、圧電磁器振動子１６が貼合わされて振動部が
構成されている。振動ケース１０は底面部と斜面部とか
らなる底の浅い形状とし、圧電磁器振動子１６の貼合わ
せを容易とした。FIG. 1 is a sectional view of an ultrasonic ceramic microphone according to an embodiment of the present invention. As shown in FIG. 1, the vibration case 10 has a truncated conical shape, and a piezoelectric ceramic vibrator 16 is bonded to the inner bottom surface of the vibration case 10 to form a vibrating section. The vibration case 10 has a shallow bottom shape consisting of a bottom surface and a sloped surface to facilitate bonding of the piezoelectric ceramic vibrator 16.
端子板１１は中央部に端子１８．１９が植設され、端子
１８、１９の周囲には環状で先端が外側下方に傾斜した
筒状固定部１２が突設され、この筒状固定部１２は円錐
台形状振動ケース１０の斜面内側に沿って当接する構造
になっており、筒状固定部１２の先端斜面が振動ケース
１０の内側に弾性接着剤２０を介して固定されている。Terminals 18 and 19 are implanted in the center of the terminal board 11, and around the terminals 18 and 19, an annular cylindrical fixing part 12 with a tip slanted outward and downward protrudes. It has a structure in which it abuts along the inner side of the slope of the truncated cone-shaped vibration case 10, and the sloped end of the cylindrical fixing part 12 is fixed to the inside of the vibration case 10 via an elastic adhesive 20.
さらに端子板１１の筒状固定部１２の外周側には環状凹
部１３が設けられ、この環状凹部１３により振動ケース
１０の外周端を、環状凹部１３に充填された弾性接着剤
１５を介して密閉支持している。端子板１１の下面には
金属ベース１４が取付けられ、端子板１１の保護とシー
ルド用として用いられている端子１８．１９はリード線
１７により圧電磁器振動子１６に接続されている。Furthermore, an annular recess 13 is provided on the outer peripheral side of the cylindrical fixing part 12 of the terminal board 11, and the outer peripheral end of the vibration case 10 is sealed by this annular recess 13 via an elastic adhesive 15 filled in the annular recess 13. I support it. A metal base 14 is attached to the lower surface of the terminal plate 11, and terminals 18 and 19 used for protecting and shielding the terminal plate 11 are connected to the piezoelectric ceramic vibrator 16 by lead wires 17.
上記構成により、振動ケース１０に貼合わせた圧電磁器
振動子１６と、端子板１１に植設された端子１８゜１９
とをリード線１７を介して接続し、端子板１１における
環状凹部１３および筒状固定部１２の先端斜面に弾性接
着剤１５．２０を充填および塗布して振動ケース１０を
接着するだけで容易に超音波セラミックマイクロホンを
組立てることができる。また、振動ケース１０の底部と
筒状固定部１２とにより空気共振筒が構成されて振動効
率が向上し、さらに振動ケース１０は外周端で弾性的に
端子板１１上に支持されているため、振動ケース１０の
高次共振は吸収され、安定した振動を検出することがで
きる。また、端子板１１は振動ケース１０の外径より大
きく、支持圧力は端子板１１で受けられる。With the above configuration, the piezoelectric ceramic vibrator 16 bonded to the vibration case 10 and the terminals 18 and 19 implanted in the terminal plate 11
The vibration case 10 can be easily attached by simply connecting the terminal board 11 with the annular recess 13 and the slanted end of the cylindrical fixing part 12 with elastic adhesive 15, 20 and applying the elastic adhesive 15, 20 to the terminal plate 11 via the lead wire 17. You can assemble an ultrasonic ceramic microphone. In addition, the bottom of the vibration case 10 and the cylindrical fixing part 12 form an air resonant tube, improving vibration efficiency, and since the vibration case 10 is elastically supported on the terminal plate 11 at the outer peripheral end, High-order resonance of the vibration case 10 is absorbed, and stable vibrations can be detected. Further, the terminal plate 11 has a larger outer diameter than the vibration case 10, and the supporting pressure can be received by the terminal plate 11.
なお、端子板１１の筒状固定部１２の先端斜面は弾性接
着剤２０を塗布せず、振動ケース１０に当接させるだけ
でもよい、また、金属ベース１４は組立て前にあらかじ
め端子板１１に取付けておいてもよいし、組立て後に取
付けてもよい。Note that the sloped end of the cylindrical fixing portion 12 of the terminal board 11 may be simply brought into contact with the vibration case 10 without applying the elastic adhesive 20. Also, the metal base 14 may be attached to the terminal board 11 in advance before assembly. It can be left in place, or it can be attached after assembly.
発明の効果
以上のように本発明によれば、振動ケースの斜面部を端
子板上の筒状固定部に当接して構成することにより、振
動ケースの底部と筒状固定部との空気共ｒＲ簡が構成さ
れて振動効率が向上し、高感度化を実現できた。また、
振動ケース外周端を弾性的に端子板上に支持することに
より、振動ケースの高次共振を吸収する効果を有し、安
定した振動を検出することができる。端子板を振動ケー
ス外径より大きく構成しているため、支持圧力を端子板
で受けることができる。さらに、超音波セラミックマイ
クロホンは振動ケース、圧電磁器振動子、端子板の最小
部品点数で構成されているため、組立ての容易な構造を
提供することができる。Effects of the Invention As described above, according to the present invention, by configuring the slope portion of the vibration case to be in contact with the cylindrical fixing portion on the terminal plate, the air flow between the bottom portion of the vibration case and the cylindrical fixing portion is reduced. The simple structure improved vibration efficiency and made it possible to achieve high sensitivity. Also,
By elastically supporting the outer circumferential end of the vibrating case on the terminal plate, it has the effect of absorbing high-order resonance of the vibrating case, and stable vibration can be detected. Since the terminal plate is configured to have a larger outer diameter than the vibration case, the terminal plate can receive support pressure. Furthermore, since the ultrasonic ceramic microphone is constructed with a minimum number of parts, such as a vibration case, a piezoelectric vibrator, and a terminal plate, it can provide a structure that is easy to assemble.
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
クロホンを示す断面図、第２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。
１０・・・振動ケース、１１・・・端子板、１２・・・
筒状固定部、１３・・・環状凹部、１４・・・金属ベー
ス、１５・・・弾性接着剤、１６・・・圧電磁器振動子
、１７・・・リード線、１８．１９・・・端子。
代理人 森 本 義 弘FIG. 1 is a sectional view showing an ultrasonic ceramic microphone according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional ultrasonic ceramic microphone. 10... Vibration case, 11... Terminal board, 12...
Cylindrical fixing part, 13... Annular recess, 14... Metal base, 15... Elastic adhesive, 16... Piezoelectric ceramic vibrator, 17... Lead wire, 18.19... Terminal . Agent Yoshihiro Morimoto
Claims (1)
を貼合わせてなる振動部を、前記振動ケースの斜面に当
接する筒状固定部と内部に充填した弾性接着剤により振
動ケース外周端を密封固定する凹部とを有してなる端子
板で支持した超音波セラミックマイクロホン。1. A vibrating part is made by bonding a piezoelectric ceramic vibrator to the inner bottom surface of a truncated conical vibrating case, and the outer peripheral edge of the vibrating case is sealed by a cylindrical fixing part that comes into contact with the slope of the vibrating case and an elastic adhesive filled inside. An ultrasonic ceramic microphone supported by a terminal plate having a fixing recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6450389A JPH02243098A (en) | 1989-03-15 | 1989-03-15 | Ultrasonic wave ceramic microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6450389A JPH02243098A (en) | 1989-03-15 | 1989-03-15 | Ultrasonic wave ceramic microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02243098A true JPH02243098A (en) | 1990-09-27 |
Family
ID=13260072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6450389A Pending JPH02243098A (en) | 1989-03-15 | 1989-03-15 | Ultrasonic wave ceramic microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02243098A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7392705B2 (en) | 2005-03-29 | 2008-07-01 | Denso Corporation | Ultrasonic sensor |
| CN110166913A (en) * | 2018-02-14 | 2019-08-23 | 复旦大学附属眼耳鼻喉科医院 | Biocompatibility microphone and preparation method thereof |
-
1989
- 1989-03-15 JP JP6450389A patent/JPH02243098A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7392705B2 (en) | 2005-03-29 | 2008-07-01 | Denso Corporation | Ultrasonic sensor |
| CN110166913A (en) * | 2018-02-14 | 2019-08-23 | 复旦大学附属眼耳鼻喉科医院 | Biocompatibility microphone and preparation method thereof |
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