JPS61120600A - Ultrasonic ceramic microphone - Google Patents
Ultrasonic ceramic microphoneInfo
- Publication number
- JPS61120600A JPS61120600A JP24118484A JP24118484A JPS61120600A JP S61120600 A JPS61120600 A JP S61120600A JP 24118484 A JP24118484 A JP 24118484A JP 24118484 A JP24118484 A JP 24118484A JP S61120600 A JPS61120600 A JP S61120600A
- Authority
- JP
- Japan
- Prior art keywords
- face
- cylindrical case
- lead wire
- lead
- case
- 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 description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000853 adhesive Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 11
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 229910052573 porcelain Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Abstract
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 used as a parking meter, a vehicle rear detection device, or a distance meter.
従来例の構成とその問題点
従来のこの種の超音波セラミックマイクロホンについて
第１図とともに説明する。まず１は圧電磁器板である。Structure of a conventional example and its problems A conventional ultrasonic ceramic microphone of this type will be explained with reference to FIG. First, 1 is a piezoelectric ceramic plate.
断面が円錐台形状の底面部２ａを有する筒状ケース２の
内底面に圧電磁器板１を貼り合わせ、バイモルフ振動子
を構成する。３は共振リングで前記筒状ケース２の内側
面に固定される。４は端子板で弾性部材よりなるスペー
サ６を共振リング３に接して筒状ケース２内に挿入し、
前記スペーサ５に圧着して前記端子板４を固定する。６
は弾性接着剤で端子板４と筒状ケース２間が密封される
ように注入する。７色はリード線で端子板４に植設され
た端子８乙に前記リード線γ＆の一方をハンダ付けし、
他方を筒状ケース２と共振リング３の接触面に導電性接
着剤９を介して接着される。７ｂもリード線で圧電磁器
＆１の電極面と端子板４に植設された端子８ｂに・・ン
ダ付けで接続される。A piezoelectric ceramic plate 1 is bonded to the inner bottom surface of a cylindrical case 2 having a bottom portion 2a having a truncated conical cross section to constitute a bimorph vibrator. A resonance ring 3 is fixed to the inner surface of the cylindrical case 2. 4 is a terminal plate, and a spacer 6 made of an elastic member is inserted into the cylindrical case 2 in contact with the resonance ring 3.
The terminal plate 4 is fixed by being crimped onto the spacer 5. 6
is injected with elastic adhesive so that the space between the terminal plate 4 and the cylindrical case 2 is sealed. For the 7th color, one of the lead wires γ& is soldered to the terminal 8B planted on the terminal board 4 with a lead wire.
The other end is bonded to the contact surface between the cylindrical case 2 and the resonance ring 3 via a conductive adhesive 9. 7b is also connected by a lead wire to the electrode surface of the piezoelectric ceramic &1 and the terminal 8b implanted in the terminal plate 4 by soldering.
以上のような従来の構成によるとリード線了乙の他方を
筒状ケース２と共振リング３の接触面に導電性接着剤９
を介して接続する構成であるが、リード＋１ｌｌｌＪ７
＆が軟勝であるためと共振リング３の上端面が平面であ
るためにリード線７乙の他方を筒状ケース２と共振リン
グ３の接触面に保持させる時に作業バラツキが大きくな
り筒状ケース２と共振リング３の接触面よりかなり離れ
てリード線７ａが接続される。このため筒状ケース２と
リード線７亀間の接触抵抗が大きくなり著しい感度低下
が生じる問題があった。According to the conventional configuration as described above, the other end of the lead wire is attached to the contact surface of the cylindrical case 2 and the resonance ring 3 with a conductive adhesive 9.
Although the configuration is to connect via lead +1llllJ7
Since & is a soft wire and the upper end surface of the resonant ring 3 is flat, there will be large variations in work when holding the other lead wire 7 on the contact surface of the cylindrical case 2 and the resonant ring 3. The lead wire 7a is connected at a considerable distance from the contact surface between the resonant ring 2 and the resonant ring 3. For this reason, there is a problem in that the contact resistance between the cylindrical case 2 and the lead wire 7 becomes large, resulting in a significant decrease in sensitivity.
発明の目的
本発明は、前記のような従来の欠点全除去し作業バラツ
キを小さくするとともに安定した感度金得ることのでき
る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。OBJECTS OF THE INVENTION It is an object of the present invention to provide an ultrasonic ceramic microphone which can completely eliminate the above-mentioned conventional drawbacks, reduce work variations, and provide stable sensitivity.
発明の構成
この目的を達成するために本発明の超音波セラミックマ
イクロホンは１円錐台形状の底面部を有する筒状ケース
の内側面に固定される共振リングの外端面にテーパ形状
端面を設け、このテーパ形状端面と筒状ケースのすき間
にリード線を挿入し導電性接着剤でリード線を接続した
ものである。Structure of the Invention In order to achieve this object, the ultrasonic ceramic microphone of the present invention is provided with a tapered end surface on the outer end surface of a resonance ring fixed to the inner surface of a cylindrical case having a truncated conical bottom surface. A lead wire is inserted into the gap between the tapered end face and the cylindrical case, and the lead wire is connected with a conductive adhesive.
この構成によってリード線は筒状ケースに接触するため
筒状ケースとリード線の間隔は一定となり、共振リング
のテーパ形状端面と筒状ケースのすき間にリード線を挿
入する工法であるため作業バラツキか小さくなる。よっ
て筒状ケースとリード線間の接触抵抗のバラツキも小さ
くなり安定した感度を得ることができるものである。With this configuration, the lead wire comes into contact with the cylindrical case, so the distance between the cylindrical case and the lead wire is constant, and since the lead wire is inserted into the gap between the tapered end face of the resonance ring and the cylindrical case, there may be work variations. becomes smaller. Therefore, variations in contact resistance between the cylindrical case and the lead wires are reduced, and stable sensitivity can be obtained.
実施例の説明
以下、本発明の一実施例を第２図、第３図を用いて説明
する。圧電磁器板１１を断面が円錐台形状の底面部１２
１Ｌｔｌ″有する筒状ケース１２の内底面部に貼り合わ
せバイモルフ振動子を構成する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. The piezoelectric ceramic plate 11 has a bottom portion 12 having a truncated conical cross section.
A bimorph resonator is constructed by bonding the inner bottom surface of a cylindrical case 12 having a diameter of 1Ltl''.
筒状ケース１２の内側面に共振リング１３が固定される
。共振リング１３の外端面にテーパ形状端面１３ａが設
けられており、筒状ケース１２の内側面と共振リング１
３のテーパ形状端面１３＆のすき間にリード線１７２Ｌ
の一方が筒状レース１２の内側面に接触するまで挿入し
導電性接着剤１９で接着固定している。共振す／グツ３
のテーパ形状端面１３２Ｌと筒状ケース１２の内側面の
すき間が深くなる程狭くなりすき間の底面は共振り／グ
ツ３と筒状ケース１２の内側面が接触しているため、リ
ード線１アａの一方を深く挿入するとリード線１７＆が
筒状ケース１２の内側面に完全に接触することになるの
で接触抵抗のバラツキはなくなる。又リード線１７１Ｌ
の一方をすき間に挿入する際すき間の上方は若干広くな
っているため挿入がしやすく作業バラツキも小さくなる
。１５はダンパー効果ヲモたせたシリコンスペーサで、
端子板１４を筒状ケース１２の開孔端に固定する場合、
振動干渉を防ぐように取り付けられている。１６は端子
板１４の外周端と筒状ケース１２の開孔端を密封する弾
性接着剤である。リード線１７＆の他方は端子板１４に
植設された端子１８＆にハンダ付けをし接続したもので
ある。リード線１７ｂは圧電磁器板１１の電極面と端子
板１４に植設された端子１８ｂにハング付けで接続し電
気的結合を行うものである。A resonance ring 13 is fixed to the inner surface of the cylindrical case 12. A tapered end surface 13a is provided on the outer end surface of the resonant ring 13, and the inner surface of the cylindrical case 12 and the resonant ring 1
Lead wire 172L in the gap between the tapered end face 13 & of 3.
is inserted until one side of the cylindrical race 12 contacts the inner surface of the cylindrical race 12, and is adhesively fixed with a conductive adhesive 19. Resonance/gutsu 3
The deeper the gap between the tapered end surface 132L and the inner surface of the cylindrical case 12, the narrower it becomes, and the bottom surface of the gap is in contact with the resonance/guts 3 and the inner surface of the cylindrical case 12. When one of the lead wires is deeply inserted, the lead wire 17 & comes into complete contact with the inner surface of the cylindrical case 12, thereby eliminating variations in contact resistance. Also lead wire 171L
When inserting one of the two into the gap, the upper part of the gap is slightly wider, which makes insertion easier and reduces work variation. 15 is a silicon spacer with a damper effect,
When fixing the terminal plate 14 to the open end of the cylindrical case 12,
Installed to prevent vibration interference. Reference numeral 16 denotes an elastic adhesive that seals the outer peripheral end of the terminal plate 14 and the open end of the cylindrical case 12. The other lead wire 17 & is connected to a terminal 18 & implanted in the terminal board 14 by soldering. The lead wires 17b are connected by hanging to the electrode surface of the piezoelectric ceramic plate 11 and the terminals 18b implanted in the terminal plate 14 for electrical connection.
発明の効果
以上本発明によれば、共振リングの外端面にテーパ形状
端面を設けることにより筒状ケースと共振リングのテー
パ形状端面の間に断面が三角形のすき間ができるため、
このすき間にリード線を深く挿入することでリード線は
筒状ケースに接触しやすくなり接触バラツキもかなり小
さくできる。Effects of the Invention According to the present invention, by providing a tapered end surface on the outer end surface of the resonant ring, a gap having a triangular cross section is created between the cylindrical case and the tapered end surface of the resonant ring.
By inserting the lead wire deeply into this gap, the lead wire can easily come into contact with the cylindrical case, and the variation in contact can be considerably reduced.
よってリード線と筒状ケースの接触抵抗のバラツキも小
さくなり安定した感度特性を得ることができる。更にリ
ード線を挿入する際、共振リングのテーパ形状端面と筒
状ケースのすき間の開孔口は若干広くなっているため容
易にリード線を挿入することができ作業バラツキを小さ
くすることができる。Therefore, variations in contact resistance between the lead wire and the cylindrical case are reduced, and stable sensitivity characteristics can be obtained. Further, when inserting the lead wire, since the opening between the tapered end surface of the resonance ring and the cylindrical case is slightly wider, the lead wire can be easily inserted and work variations can be reduced.
第１図は従来例の超音波セラばツクマイクロホンの断面
図、第２図は本発明の一実施例における超音波セラミッ
クマイクロホンの断面図、第３図は本発明の部分斜視図
である。
１１・・・・・・圧電磁器板、１２・・・；・・筒状ケ
ース、１２λ・・・・・・底面部、１３・・・・・・共
振リング、１３八・・・・・・テーパ形状端面、１４・
・・・・・端子板、１６・・・・・・シリコンスペーサ
、１６・・・・・・弾性接着剤ｓ １７ ’ ｅ１７
ｋｌ・・・・・・リード線、 １８ａ、１ｓｂ・・・
・・・端子、１９・・・・・導電性接着剤。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
怖FIG. 1 is a sectional view of a conventional ultrasonic ceramic microphone, FIG. 2 is a sectional view of an ultrasonic ceramic microphone according to an embodiment of the present invention, and FIG. 3 is a partial perspective view of the present invention. 11...Piezoelectric ceramic plate, 12...;...Cylindrical case, 12λ...Bottom part, 13...Resonance ring, 138... Tapered end face, 14.
...Terminal board, 16...Silicon spacer, 16...Elastic adhesive s 17' e17
kl...Lead wire, 18a, 1sb...
...terminal, 19...conductive adhesive. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
illustration scary
Claims (1)
面部内側に圧電磁器板を貼り合わせてバイモルフ振動子
を構成し、前記筒状ケースの内側面に固定される共振リ
ングの外端面にテーパ形状端面を設け、このテーパ形状
端面にリード線を配し導電性接着剤で筒状ケースに接続
したことを特長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 bottom surface of a cylindrical case having a truncated conical bottom surface in cross section to constitute a bimorph resonator, and a resonant ring fixed to the inner surface of the cylindrical case has an outer end surface. An ultrasonic ceramic microphone characterized by having a tapered end face, a lead wire arranged on the tapered end face, and connected to a cylindrical case with a conductive adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24118484A JPS61120600A (en) | 1984-11-15 | 1984-11-15 | Ultrasonic ceramic microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24118484A JPS61120600A (en) | 1984-11-15 | 1984-11-15 | Ultrasonic ceramic microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61120600A true JPS61120600A (en) | 1986-06-07 |
Family
ID=17070476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24118484A Pending JPS61120600A (en) | 1984-11-15 | 1984-11-15 | Ultrasonic ceramic microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120600A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008065959A1 (en) | 2006-11-27 | 2008-06-05 | Murata Manufacturing Co., Ltd. | Ultrasonic transducer |
| US7737609B2 (en) | 2006-10-20 | 2010-06-15 | Murata Manufacturing Co., Ltd. | Ultrasonic sensor |
-
1984
- 1984-11-15 JP JP24118484A patent/JPS61120600A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7737609B2 (en) | 2006-10-20 | 2010-06-15 | Murata Manufacturing Co., Ltd. | Ultrasonic sensor |
| WO2008065959A1 (en) | 2006-11-27 | 2008-06-05 | Murata Manufacturing Co., Ltd. | Ultrasonic transducer |
| EP2076061A1 (en) * | 2006-11-27 | 2009-07-01 | Murata Manufacturing Co. Ltd. | Ultrasonic transducer |
| EP2076061A4 (en) * | 2006-11-27 | 2011-06-01 | Murata Manufacturing Co | Ultrasonic transducer |
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