JPS6359160B2 - - Google Patents
Info
- Publication number
- JPS6359160B2 JPS6359160B2 JP58067089A JP6708983A JPS6359160B2 JP S6359160 B2 JPS6359160 B2 JP S6359160B2 JP 58067089 A JP58067089 A JP 58067089A JP 6708983 A JP6708983 A JP 6708983A JP S6359160 B2 JPS6359160 B2 JP S6359160B2
- Authority
- JP
- Japan
- Prior art keywords
- sounding body
- piezoelectric
- piezoelectric buzzer
- electronic component
- fixed
- 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
- 230000010355 oscillation Effects 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000007740 vapor deposition Methods 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
【発明の詳細な説明】
この発明は圧電ブザーに関し、特に弾性薄板に
圧電素子を貼着した発音体に電気力を印加し、発
音体を屈曲振動させることで特定周波数の音波を
発生させる圧電ブザーの改良に関するものであ
る。Detailed Description of the Invention The present invention relates to a piezoelectric buzzer, and more particularly to a piezoelectric buzzer that generates sound waves of a specific frequency by applying electric force to a sounding body in which a piezoelectric element is attached to a thin elastic plate and causing the sounding body to bend and vibrate. This is related to the improvement of.
従来より、圧電素子に電気力を付与すると特定
の周波数で振動する特性を利用したいわゆる圧電
ブザーは各種提供されており、その一例を示すと
第１図に示すようなものが一般的であつた。 Conventionally, various types of so-called piezoelectric buzzers have been provided, which utilize the characteristic of vibrating at a specific frequency when an electric force is applied to a piezoelectric element, and one example is shown in Figure 1. .
しかしながら、このような従来の圧電ブザー
は、特に近年の電子部品に対する小形化・薄形化
の要請に対して十分に応じえないという問題点を
有していた。 However, such conventional piezoelectric buzzers have a problem in that they cannot fully meet the recent demands for smaller and thinner electronic components.
すなわち、同図に示す圧電ブザーは、偏平な円
筒状のケース１０と裏蓋１２、発音体１４および
抵抗・トランジスタ等の電子部品１６を搭載した
プリント配線板１８とで概略構成されており、発
音体１４は略円板状の圧電素子２０を、略円板状
の弾性薄板２２の中心部に貼着し、さらに弾性薄
板２２をシリコンゴム等の接着剤２４でもつて、
前記ケース１０の天井面に設けられた突起部２６
に固着していた。 That is, the piezoelectric buzzer shown in the figure is roughly composed of a flat cylindrical case 10, a back cover 12, a sounding body 14, and a printed wiring board 18 on which electronic components 16 such as resistors and transistors are mounted. The body 14 has a piezoelectric element 20 having a substantially disk shape attached to the center of a thin elastic plate 22 having a substantially disk shape, and further attaching the elastic thin plate 22 with an adhesive 24 such as silicone rubber.
A protrusion 26 provided on the ceiling surface of the case 10
It was stuck to.
そして、発音体１４の下方に、上記プリント配
線板１８を、ケース１０の内側面に係止し、さら
にこの下方に上記裏蓋１２をケース１０の内側面
に嵌着した構造となつていた。 The printed wiring board 18 is fixed to the inner surface of the case 10 below the sounding body 14, and the back cover 12 is fitted to the inner surface of the case 10 below this.
このような構造の圧電ブザーは、プリント配線
板１８を必要とするだけでなく、上記発音体１４
の電極部と、このプリント配線板１８とをリード
線２８で電気的に接続しなければならず、ケース
１０内が比較的狭いため、この接続作業は面倒な
上にコストアツプの要因となつていた。 A piezoelectric buzzer having such a structure not only requires the printed wiring board 18 but also the sounding body 14.
It is necessary to electrically connect the electrode section of the circuit board 18 to the printed wiring board 18 using a lead wire 28, and since the inside of the case 10 is relatively narrow, this connection work is troublesome and causes an increase in costs. .
また、上述のような構造で圧電ブザーの小形
化・薄形化を図るには、プリント配線板１８上に
搭載される電子部品１６を寝かせた状態で取り付
けるとか、あるいは電子部品１６を近年開発され
たチツプ部品等に置き換えるといつた構成が考え
られるが、これらによる効果では小形化・薄形化
の要請に十分に対応できないところであつた。 Furthermore, in order to make the piezoelectric buzzer smaller and thinner with the above-described structure, the electronic component 16 mounted on the printed wiring board 18 may be mounted in a lying position, or the electronic component 16 may be mounted on the printed wiring board 18 using a method developed in recent years. Although it is possible to consider a structure in which the device is replaced with chip parts or the like, the effects obtained by these methods cannot sufficiently meet the demands for miniaturization and thinning.
この発明は、上述のような背景の下になされた
ものであり、その目的とするところは、生産コス
トを上昇させることなく小形化・薄形化を可能に
する圧電ブザーを提供するところにある。 This invention was made against the above-mentioned background, and its purpose is to provide a piezoelectric buzzer that can be made smaller and thinner without increasing production costs. .
この目的を達成するため、この発明は、圧電素
子を弾性薄板上に貼着した圧電ブザーにおいて、
圧電素子の上面側の縁部近傍に所定形状を有する
導電性のパターン部を形成し、このパターン上に
電子部品を固着して発振回路を構成するととも
に、この電子部品の固着部の発音体のノーダルポ
イントとなすという特徴を有するものである。 In order to achieve this object, the present invention provides a piezoelectric buzzer in which a piezoelectric element is attached on an elastic thin plate.
A conductive pattern portion having a predetermined shape is formed near the edge of the top surface of the piezoelectric element, and an electronic component is fixed on this pattern to form an oscillation circuit. It has the characteristic of being a nodal point.
以下に、この発明の好適な実施例について、添
付図面を参照し説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
なお、以下の説明においては、上記従来例と同
一若しくは相当する部分ついては、同一符号を付
すものである。 In the following description, parts that are the same as or correspond to those in the conventional example described above are given the same reference numerals.
第２図および第３図は、この発明に係る圧電ブ
ザーの一実施例を示すものである。 FIGS. 2 and 3 show an embodiment of a piezoelectric buzzer according to the present invention.
同図に示す圧電ブザーは、下方の開口した偏平
な円筒形の合成樹脂製等のケース１０と、円板状
の圧電素子２０を円板状の弾性薄板２２上に貼着
した発音体１４とで概略構成されている。 The piezoelectric buzzer shown in the figure includes a flat cylindrical case 10 made of synthetic resin or the like with an opening at the bottom, and a sounding body 14 in which a disc-shaped piezoelectric element 20 is adhered to a disc-shaped elastic thin plate 22. It is roughly composed of.
そして、上記圧電素子２０上には、薄膜状の導
電性部材３０が、蒸着等によつて形成され、かつ
この導電性部材３０を分断してドライブ電極３０
ａ、フイードバツク電極３０ｂを形成し、これら
の電極３０ａ，３０ｂと発振回路とを電気的に接
続して、上記発音体１４を特定の固有振動周波数
で振動させるものであるが、同図に示す圧電ブザ
ーは、従来のこの種の物に対して以下に述べる特
徴を有するものである。 A thin film-like conductive member 30 is formed on the piezoelectric element 20 by vapor deposition or the like, and the conductive member 30 is divided to form a drive electrode 30.
a. A feedback electrode 30b is formed, and these electrodes 30a, 30b are electrically connected to an oscillation circuit to vibrate the sounding body 14 at a specific natural vibration frequency. The buzzer has the following features compared to conventional devices of this type.
すなわち、上記圧電素子２０の上面側縁部近傍
に、上記導電性部材３０からなるフイードバツク
電極３０ｂをさらに分断して、所定形状のパター
ン部３０ｃを形成し、このパターン部３０ｃ上に
トランジスタ・抵抗等の電子部品１６を固着して
発振回路を構成するとともに、これらの電子部品
１６の固着部を上記発音体１４のノーダルポイン
ト（振動の節点）となしたところにある。 That is, near the upper side edge of the piezoelectric element 20, the feedback electrode 30b made of the conductive member 30 is further divided to form a pattern portion 30c of a predetermined shape, and a transistor, a resistor, etc. are formed on this pattern portion 30c. The electronic components 16 are fixed to constitute an oscillation circuit, and the fixed portions of these electronic components 16 are set as nodal points (vibration nodes) of the sounding body 14.
この場合、上記電子部品１６としては、通常の
リード線を有する電子部品１６でもよいが、チツ
プ部品、メルフ部品の方がより小形化・薄形化出
来るため、望ましいところである。 In this case, the electronic component 16 may be an electronic component 16 having a normal lead wire, but chip components or melf components are preferable because they can be made smaller and thinner.
また、外部接続用リード線３２の接続ポイント
も、上記電子部品１６の固着部と同様に、上記発
音体１４のノーダルポイントとし、さらに上記弾
性薄板２２とケース１０とを接着剤２４で固着す
るポイントも発音体１４のノーダルポイントとな
すことが、圧電ブザーの電気的特性を維持する上
で望ましいところである。 Further, the connection point of the external connection lead wire 32 is also a nodal point of the sounding body 14, similar to the fixed part of the electronic component 16, and the thin elastic plate 22 and the case 10 are fixed with an adhesive 24. It is desirable to make the point a nodal point of the sounding body 14 in order to maintain the electrical characteristics of the piezoelectric buzzer.
さて、上述のように構成した圧電ブザーの上記
接続用リード線３２を、所定の電源に接続する
と、上記電子部品１６で構成された発振回路と発
音体１４とで自励発振が行なわれ、圧電素子２０
の振動は、これが弾性薄板２２上に貼着されてい
るため、屈曲振動となり、発音体１４の厚み・径
等で定まる一定の固有振動周波数の音波を発生す
る。 Now, when the connection lead wire 32 of the piezoelectric buzzer configured as described above is connected to a predetermined power source, self-excited oscillation is performed between the oscillation circuit constituted by the electronic component 16 and the sounding body 14, and the piezoelectric buzzer Element 20
Since this is attached to the elastic thin plate 22, the vibration becomes a bending vibration, and generates a sound wave with a constant natural vibration frequency determined by the thickness, diameter, etc. of the sounding body 14.
そして、この音波の周波数が一定であることは
振動節となるノーダルポイントは、弾性薄板２２
および圧電素子２０が円形である故に、同心円状
に分布することになり、このノーダルポイントは
圧電ブザーの固有振動周波数を設定すれば、比較
的簡単に算出することができる。 Since the frequency of this sound wave is constant, the nodal point, which is a vibration node, is located at the elastic thin plate 22.
Since the piezoelectric element 20 is circular, it is distributed concentrically, and this nodal point can be calculated relatively easily by setting the natural vibration frequency of the piezoelectric buzzer.
従つて、上記のように電子部品１６の固着部や
外部接続用リード線３２の接続点をノーダルポイ
ントとすることは比較的容易にできる。 Therefore, it is relatively easy to make the fixed portion of the electronic component 16 or the connection point of the external connection lead wire 32 a nodal point as described above.
この場合、注目すべきことは、これらの電子部
品１６の固着部等が、上記発音体１４のノーダル
ポイントに位置させることで、圧電ブザーの固有
振動周波数に何ら影響を及ぼさないことであり、
このため発音体１４の屈曲振動は効率よく行なわ
れ電気―音変換のロスを殆ど伴わないことにな
る。 In this case, what should be noted is that the fixed parts of these electronic components 16 are located at the nodal point of the sounding body 14, so that they do not have any effect on the natural vibration frequency of the piezoelectric buzzer.
Therefore, the bending vibration of the sounding body 14 is performed efficiently, with almost no loss in electricity-sound conversion.
そして、従来の電子部品１６を搭載するプリン
ト配線板１８が、不要になることは、圧電ブザー
を小形化・薄形化する上で極めて大きな効果を奏
することができるだけでなく、従来のようにプリ
ント配線板１８と発音体１４との狭い空間部での
面倒な接続作業も不要となり、生産性の向上およ
びコストダウンに大きく貢献することができる。 The elimination of the need for the printed wiring board 18 on which the conventional electronic components 16 are mounted not only has an extremely large effect on making the piezoelectric buzzer smaller and thinner, but also makes it possible to make the piezoelectric buzzer smaller and thinner. There is no need for troublesome connection work in a narrow space between the wiring board 18 and the sounding body 14, which can greatly contribute to improving productivity and reducing costs.
以上のようにこの発明の圧電ブザーは、導電性
の薄膜状の電極を固着した圧電素子を弾性薄板上
の貼着してなる発音体と、前記電極に接続された
電子部品で構成された発振回路とからなる圧電ブ
ザーにおいて、前記圧電素子の上面側縁部近傍に
所定形状のパターン部を形成し、このパターン部
上に前記電子部品を固着して前記発振回路を構成
するとともに、前記電子部品の固着部を前記発音
体のノーダルポイントとなすことを特徴とするも
のであり、圧電ブザーの電気的特性を害すること
なくこれを小形化・薄形化できるとともに、生産
性の向上ひいてはコストダウンも可能ならしめる
ものである。 As described above, the piezoelectric buzzer of the present invention has an oscillating device that is composed of a sounding body made of a piezoelectric element to which a conductive thin film electrode is attached on an elastic thin plate, and an electronic component connected to the electrode. In a piezoelectric buzzer comprising a circuit, a pattern portion of a predetermined shape is formed near the upper side edge of the piezoelectric element, the electronic component is fixed on the pattern portion to constitute the oscillation circuit, and the electronic component The fixed portion of the piezoelectric buzzer is a nodal point of the sounding body, which allows the piezoelectric buzzer to be made smaller and thinner without impairing its electrical characteristics, and also improves productivity and reduces costs. This also makes it possible.
第１図は、従来の圧電ブザーの一例を示す断面
図である。第２図および第３図は、この発明に係
る圧電ブザーの一実施例を示し、第２図は発音体
および発振回路の形成状態を示す平面図、第３図
はケース内に収容した状態の部分断面図である。
１０……ケース、１２……裏蓋、１４……発音
体、１６……電子部品、１８……プリント配線
板、２０……圧電素子、２２……弾性薄板、２４
……接着剤、２６……突起部、２８……リード
線、３０ａ……ドライブ電極、３０ｂ……フイー
ドバツク電極、３０ｃ……パターン部、３２……
外部接続用リード線。
FIG. 1 is a sectional view showing an example of a conventional piezoelectric buzzer. 2 and 3 show an embodiment of the piezoelectric buzzer according to the present invention, FIG. 2 is a plan view showing the state of formation of the sounding body and the oscillation circuit, and FIG. 3 is a plan view of the piezoelectric buzzer housed in the case. FIG. 10...Case, 12...Back cover, 14...Sounding body, 16...Electronic component, 18...Printed wiring board, 20...Piezoelectric element, 22...Elastic thin plate, 24
... Adhesive, 26 ... Protrusion, 28 ... Lead wire, 30a ... Drive electrode, 30b ... Feedback electrode, 30c ... Pattern portion, 32 ...
Lead wire for external connection.
Claims (1)
弾性薄板上に貼着した発音体と、該電極に接続さ
れた電子部品で構成された発振回路とからなる圧
電ブザーにおいて該圧電素子の上面側縁部近傍に
所定形状のパターン部を形成し、該パターン部上
に該電子部品を固着して該発振回路を構成すると
ともに該電子部品の固着部を該発音体のノーダル
ポイントとなすことを特徴とする圧電ブザー。1. In a piezoelectric buzzer consisting of a sounding body in which a piezoelectric element to which a conductive thin film electrode is fixed is attached on an elastic thin plate, and an oscillation circuit made up of electronic components connected to the electrode, the upper surface of the piezoelectric element A pattern portion having a predetermined shape is formed near the side edge, and the electronic component is fixed on the pattern portion to form the oscillation circuit, and the fixed portion of the electronic component is used as a nodal point of the sounding body. A piezoelectric buzzer featuring
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58067089A JPS59193497A (en) | 1983-04-18 | 1983-04-18 | Piezo-electric buzzer |
| IT20521/84A IT1176037B (en) | 1983-04-18 | 1984-04-13 | PIEZOELECTRIC CYCLE |
| FR8406034A FR2544530B1 (en) | 1983-04-18 | 1984-04-17 | PIEZOELECTRIC SNORER |
| DE19843414722 DE3414722A1 (en) | 1983-04-18 | 1984-04-18 | Piezo-electric buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58067089A JPS59193497A (en) | 1983-04-18 | 1983-04-18 | Piezo-electric buzzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59193497A JPS59193497A (en) | 1984-11-02 |
| JPS6359160B2 true JPS6359160B2 (en) | 1988-11-17 |
Family
ID=13334804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58067089A Granted JPS59193497A (en) | 1983-04-18 | 1983-04-18 | Piezo-electric buzzer |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS59193497A (en) |
| DE (1) | DE3414722A1 (en) |
| FR (1) | FR2544530B1 (en) |
| IT (1) | IT1176037B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3518897A1 (en) * | 1985-05-25 | 1986-11-27 | Diehl GmbH & Co, 8500 Nürnberg | Electrical sound generator |
| JPH0261306U (en) * | 1988-10-28 | 1990-05-08 | ||
| DE9114727U1 (en) * | 1991-11-27 | 1993-04-01 | Werma Signalgeräte GmbH, 7201 Rietheim-Weilheim | Piezoelectric buzzer |
| FR2732805B1 (en) * | 1995-04-05 | 1997-06-20 | Klaxon Sa | PIEZOELECTRIC SOUND WARNING DEVICE, PARTICULARLY FOR VEHICLE EQUIPMENT |
| US5872506A (en) * | 1997-04-04 | 1999-02-16 | Yosemite Investment, Inc. | Piezoelectric transducer having directly mounted electrical components and noise making device utilizing same |
| DE19742249C2 (en) * | 1997-09-25 | 1999-08-05 | Georg Neumann Gmbh Berlin | microphone |
| US6130618A (en) * | 1998-01-15 | 2000-10-10 | Yosemite Investment, Inc. | Piezoelectric transducer assembly adapted for enhanced functionality |
| DE10148303B4 (en) * | 2001-09-29 | 2006-12-14 | Dbt Gmbh | Using a warning beeper |
| KR101782047B1 (en) | 2012-04-05 | 2017-10-23 | 가부시키가이샤 토킨 | Piezoelectric element, piezoelectric vibration module, and manufacturing method of these |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3123727A (en) * | 1960-06-15 | 1964-03-03 | Kritz | |
| DE7502680U (en) * | 1975-01-30 | 1976-05-13 | Gebrueder Junghans Gmbh, 7230 Schramberg | PIEZOELECTRIC BUMPER IN A WATCH |
| JPS5459923A (en) * | 1977-10-20 | 1979-05-15 | Matsushita Electric Ind Co Ltd | Composite vibrator |
| DE3230060C2 (en) * | 1981-07-31 | 1986-07-31 | Sumitomo Electric Industries, Ltd., Osaka | Piezoelectric buzzer |
-
1983
- 1983-04-18 JP JP58067089A patent/JPS59193497A/en active Granted
-
1984
- 1984-04-13 IT IT20521/84A patent/IT1176037B/en active
- 1984-04-17 FR FR8406034A patent/FR2544530B1/en not_active Expired
- 1984-04-18 DE DE19843414722 patent/DE3414722A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2544530A1 (en) | 1984-10-19 |
| DE3414722C2 (en) | 1992-04-30 |
| JPS59193497A (en) | 1984-11-02 |
| IT8420521A0 (en) | 1984-04-13 |
| FR2544530B1 (en) | 1987-07-03 |
| IT1176037B (en) | 1987-08-12 |
| DE3414722A1 (en) | 1984-11-22 |
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