JP3136628B2 - Piezoelectric sounder - Google Patents
Piezoelectric sounderInfo
- Publication number
- JP3136628B2 JP3136628B2 JP03058454A JP5845491A JP3136628B2 JP 3136628 B2 JP3136628 B2 JP 3136628B2 JP 03058454 A JP03058454 A JP 03058454A JP 5845491 A JP5845491 A JP 5845491A JP 3136628 B2 JP3136628 B2 JP 3136628B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- case
- piezoelectric
- press
- vibrating plate
- 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 - Fee Related
Links
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、圧電振動板をケース内
に収納し、電気入力を音響出力に変換し得る圧電サウン
ダに関するもので、各種家庭用電子機器，時計，玩具な
どの報知音用、各種ＯＡ機器，電卓，カメラなどの確認
音用、さらにはガス漏れ警報器，煙感知器，自動車用電
装品などの警報音用などに使用されるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric sounder in which a piezoelectric vibrating plate is housed in a case and an electric input can be converted into an acoustic output, and is used for a notification sound of various household electronic devices, watches, toys and the like. It is used for confirmation sounds of various OA devices, calculators, cameras, etc., and also for warning sounds of gas leak alarms, smoke detectors, electric components for automobiles, and the like.
【０００２】[0002]
【従来の技術】従来、この種の圧電サウンダは図４に示
すように、ケース１内に圧電セラミック板２を金属板３
に接着してなる圧電振動板４の外周をそのケース１の内
周に接着して収納し、一方ケース１の側壁の２箇所に形
成された端子挿入孔５に端子６をそれぞれ圧入し、その
各端子６の接続部６ａをそれぞれ上記圧電振動板４に半
田（または導電性接着剤）７により接続していた。ここ
で、上記端子６は図５に示すような形状をしており、長
手方向に沿った凸部６ｂを有すると共に上端部に抜け止
め用折曲部６ｃが設けられ、かつ一側辺より上記接続部
６ａが突出形成されており、さらに下端部は各種電子機
器の回路基板の取付孔などに挿入され半田付けされる端
末部６ｄとなっている。そして、上記端子６は上述した
ように上記ケース１の端子挿入孔５に挿入され、図６に
示すように長手方向に沿った凸部６ｂでもってその端子
挿入孔５に圧入保持されると共に抜け止め用折曲部６ｃ
により抜け止めがなされている。また、図１において８
はケース１の天面に形成された放音孔である。2. Description of the Related Art Conventionally, as shown in FIG.
The outer periphery of the piezoelectric vibrating plate 4 is adhered to the inner periphery of the case 1 and housed, and the terminals 6 are press-fitted into terminal insertion holes 5 formed at two places on the side wall of the case 1 respectively. The connecting portions 6a of the terminals 6 were connected to the piezoelectric vibrating plate 4 by solder (or conductive adhesive) 7, respectively. Here, the terminal 6 has a shape as shown in FIG. 5, has a protruding portion 6b along the longitudinal direction, is provided with a bent portion 6c for retaining at the upper end portion, and is formed from one side. The connecting portion 6a is formed so as to protrude, and the lower end portion is a terminal portion 6d which is inserted into a mounting hole of a circuit board of various electronic devices and soldered. The terminal 6 is inserted into the terminal insertion hole 5 of the case 1 as described above, and is pressed and held in the terminal insertion hole 5 by a convex portion 6b along the longitudinal direction as shown in FIG. Bending part 6c for stopping
Has been retained by. Also, in FIG.
Is a sound emission hole formed in the top surface of the case 1.
【０００３】この圧電サウンダは、端子６の端末部６ｄ
を通じて圧電振動板４に正，負電圧を印加し、たわみ振
動を発生させて音響効果を得るものである。[0003] The piezoelectric sounder has a terminal 6 d of a terminal 6.
The positive and negative voltages are applied to the piezoelectric vibrating plate 4 to generate flexural vibration to obtain an acoustic effect.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来の圧
電サウンダにおいては、ケースの端子挿入孔と端子との
間の圧入構造から、次のような問題点を有していた。The conventional piezoelectric sounder as described above has the following problems due to the press-fitting structure between the terminal insertion hole of the case and the terminal.
【０００５】（１）端子は長手方向に沿った凸部を有す
る形状でもってケースの端子挿入孔に圧入されているだ
けのため、端子とケースの圧入代のバラツキによる圧入
力のバラツキが大きく、端子圧入時にガタが発生した
り、あるいはケースの欠け，割れや端子の変形が生じ易
い欠点があった。[0005] (1) Since the terminals have a shape having a convex portion extending in the longitudinal direction and are simply press-fitted into the terminal insertion holes of the case, there is a large variation in press-in due to a variation in the press-fitting margin between the terminal and the case. There is a disadvantage that looseness occurs at the time of terminal press-fitting, or the case is easily chipped, cracked or deformed.
【０００６】（２）適正な圧入力を得るためには、ケー
スと端子の圧入部に高い加工精度を必要とし、生産性に
劣る欠点があった。(2) In order to obtain an appropriate press-fit, a high working precision is required for a press-fit portion of a case and a terminal, and there is a disadvantage that productivity is inferior.
【０００７】（３）上記で述べたように、ケースと端子
の圧入部にはガタ，欠け，割れ，変形が生じ易く、この
ため振動，衝撃や高湿などに対する信頼性に劣る欠点が
あった。特に、ケースと端子の圧入部にガタが発生した
場合、電子機器へ端子端末を固定した実装状態におい
て、端子端末に加わる応力および振動，衝撃などによる
応力が圧電振動板と端子の接続部分に伝達され、適正な
圧電振動板の振動を抑制し、音響特性を損なう欠点があ
った。(3) As described above, looseness, chipping, cracking, and deformation are apt to occur in the press-fit portion of the case and the terminal, and therefore, there is a defect that the reliability against vibration, impact, high humidity, and the like is poor. . In particular, when backlash is generated between the case and the press-fit part of the terminal, the stress applied to the terminal terminal and the stress due to vibration, impact, etc. are transmitted to the connection between the piezoelectric diaphragm and the terminal when the terminal terminal is fixed to the electronic device. In addition, there has been a drawback that proper vibration of the piezoelectric diaphragm is suppressed, and acoustic characteristics are impaired.
【０００８】本発明は上記のような問題点を解決すべく
なされたもので、ケースと端子の圧入構造を確実なもの
とし、かつ生産性を向上させることのできる圧電サウン
ダを提供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a piezoelectric sounder capable of ensuring a press-fitting structure between a case and a terminal and improving productivity. It is assumed that.
【０００９】[0009]
【課題を解決するための手段】上記の課題を解決するた
めに本発明の圧電サウンダは、一方の面に長手方向に沿
った凸部を有すると共に他面側に上記凸部をはさみ、こ
の凸部の突き出し方向と反対方向に切断することなく突
き出した一対の突き出し部を設けてなる薄厚の金属板か
ら構成された複数個の端子と、天面に放音孔を有すると
共に側壁に複数個の端子挿入孔が形成された下面が開口
している断面コの字状のケースと、圧電振動板とより構
成され、上記ケース内に上記圧電振動板を装着し、上記
各端子の凸部と一対の突き出し部の総厚みをそれを挿入
される上記端子挿入孔の孔幅より若干大きく形成し、上
記各端子を上記各端子孔にそれぞれ挿入して上記各端子
の凸部と一対の突き出し部を圧入保持すると共にその各
端子を上記圧電振動板に電気的機械的に接続してなるも
のである。The piezoelectric sounder of the present invention to solve the above problems BRIEF SUMMARY OF THE INVENTION may, scissors the protrusions on the other surface and having a convex portion in the longitudinal direction on one surface, this
Without cutting in the direction opposite to the
A plurality of terminals formed of a thin metal plate provided with a pair of projected portions protruding, and a lower surface having a sound emission hole on a top surface and a plurality of terminal insertion holes formed on a side wall are opened. A case having a U-shaped cross section, and a piezoelectric vibrating plate, the piezoelectric vibrating plate is mounted in the case, and the total thickness of the convex portion of each of the terminals and the pair of protruding portions is inserted. said terminal insertion hole slightly larger form than the hole width of each insert and the respective terminals of the above respective terminals in each terminal hole that
And a pair of protrusions are press-fitted and held, and their terminals are electrically and mechanically connected to the piezoelectric vibrating plate.
【００１０】[0010]
【作用】この構成によれば、長手方向に沿った凸部と他
面側にその凸部をはさむように、この凸部の突き出し方
向と反対方向に切断することなく突き出した一対の突き
出し部とを有する端子を用いたことにより、端子加工が
容易でその弾性効果によりケースと端子の圧入代の許容
範囲が大きくなり、ケースと端子の生産性が向上するこ
とになる。また、上記弾性効果によってケースと端子の
圧入部のガタが防止できると共に圧入時のケースの欠
け、割れや、端子の変形を防止できることになる。そし
て、振動や衝撃による応力が端子端末に加わっても、そ
の端子厚み方向の圧入保持力が低下することがなく、こ
の応力が圧電振動板に伝達して圧電振動板の振動を抑制
することがないので高信頼性を実現できると共に優れた
音響特性を得ることができる。 SUMMARY OF] According to this arrangement, so as to sandwich the protruding portion to the convex portion and the other side in the longitudinal direction, how protrusion of the convex portion
By using a terminal having a pair of protruding portions that protrude without cutting in the opposite direction , the terminal processing is reduced.
It is easy and its elastic effect increases the allowable range of the press-fitting allowance between the case and the terminal, thereby improving the productivity of the case and the terminal. In addition, play of the case and the press-fitting portion between the terminal and the terminal can be prevented by the elastic effect, and chipping, cracking and deformation of the terminal at the time of press-fitting can be prevented. Soshi
Therefore, even if stress due to vibration or shock is applied to the terminal
Without reducing the press-fit holding force in the terminal thickness direction.
Stress transmitted to the piezoelectric diaphragm suppresses vibration of the piezoelectric diaphragm
High reliability and excellent
Acoustical characteristics can be obtained.
【００１１】[0011]
【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。図１は本発明にかかる圧電サウンダ
の一実施例を示す断面図、図２は同要部断面図、図３は
同圧電サウンダを構成する端子の拡大斜視図である。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a piezoelectric sounder according to the present invention, FIG. 2 is a sectional view of the essential part, and FIG. 3 is an enlarged perspective view of a terminal constituting the piezoelectric sounder.
【００１２】図１〜図３において、１１は樹脂成形など
により形成された下面が開口している断面コ字状のケー
スであり、その天面には放音孔１２が形成されていると
共に側壁の２箇所には端子挿入孔１３が形成されてい
る。１４は圧電セラミック板１５と金属板１６とを接着
してなる圧電振動板であり、この圧電振動板１４はケー
ス１１内にその外周が接着されて装着されている。In FIG. 1 to FIG. 3, reference numeral 11 denotes a U-shaped case formed by resin molding or the like and having an open lower surface. The terminal insertion holes 13 are formed at the two positions. Reference numeral 14 denotes a piezoelectric vibrating plate formed by bonding a piezoelectric ceramic plate 15 and a metal plate 16, and the piezoelectric vibrating plate 14 is mounted in the case 11 with its outer periphery bonded.
【００１３】１７は図３に示すように、一方の面に長手
方向に沿った凸部１７ａを有すると共に他面側の適宜の
箇所には上記凸部１７ａをはさむように一対の突き出し
部１７ｂを設けてなる薄厚の金属板をプレス加工して形
成された端子である。また、端子１７には一側辺に上記
圧電振動板１４と電気的機械的に接続される接続部１７
ｃが突出形成され、上端部には抜け止め用折曲部１７ｄ
が設けられていると共にその反対側は各種電子機器の回
路基板の取付孔に挿入され半田付けなどで接続される端
末部１７ｅとなっている。As shown in FIG. 3, the projection 17 has a projection 17a on one surface along the longitudinal direction and a pair of projections 17b at appropriate locations on the other surface so as to sandwich the projection 17a. It is a terminal formed by pressing a thin metal plate provided. The terminal 17 has a connection portion 17 on one side electrically and mechanically connected to the piezoelectric vibrating plate 14.
c is formed to protrude, and a bent portion 17d for retaining is formed at the upper end.
The other side is a terminal portion 17e which is inserted into a mounting hole of a circuit board of various electronic devices and connected by soldering or the like.
【００１４】この端子１７は２個あり、上記ケース１１
の端子挿入孔１３にそれぞれ圧入保持されるが、上記凸
部１７ａと一対の突き出し部１７ｂの総厚みが図２に示
す端子挿入孔１３の孔幅Ａより若干大きく形成され、端
子１７のケース１１に形成された端子挿入孔１３への圧
入保持を可能としている。そして、ケース１１の端子挿
入孔１３に圧入保持された端子１７は折曲部１７ｄによ
り抜け止めが図られ、接続部１７ｃが折り曲げられて上
記圧電振動板１４と半田（または導電性接着剤）１８に
より電気的機械的に接続されている。There are two terminals 17 in the case 11
The protrusions 17a and the pair of protrusions 17b are formed to have a total thickness slightly larger than the hole width A of the terminal insertion holes 13 shown in FIG. And press-fitting into the terminal insertion hole 13 formed in the hole. The terminal 17 press-fitted and held in the terminal insertion hole 13 of the case 11 is prevented from coming off by the bent portion 17d, and the connection portion 17c is bent so that the piezoelectric vibration plate 14 and the solder (or conductive adhesive) 18 are formed. Are electrically and mechanically connected.
【００１５】この構成では、一対の突き出し部１７ｂを
支持部とし、凸部１７ａに集中荷重が加えられる２点支
持はりがケース１１と端子１７の圧入部に形成され、端
子１７を薄厚の金属板で形成することにより十分弾性を
持った圧入構造が実現できる。In this configuration, a pair of projecting portions 17b is used as a supporting portion, and a two-point supporting beam for applying a concentrated load to the projecting portion 17a is formed at the press-fit portion of the case 11 and the terminal 17, and the terminal 17 is formed of a thin metal plate. A press-fitting structure having sufficient elasticity can be realized by forming the above.
【００１６】[0016]
【発明の効果】以上のように構成された本発明の圧電サ
ウンダによれば、次の通りの効果が得られる。According to the piezoelectric sounder of the present invention configured as described above, the following effects can be obtained.
【００１７】（１）端子として長手方向に沿った凸部と
他面側にその凸部をはさむように設けられた一対の突き
出し部を有する金属板を用い、その総厚みをケースの端
子挿入孔の孔幅より若干大きい構成としているため、端
子の持つ弾性効果によりケースと端子の圧入代の許容範
囲が大きくなり、ケースと端子の生産性が向上する。(1) As a terminal, a metal plate having a pair of protruding portions provided so as to sandwich the protruding portion along the longitudinal direction and the protruding portion on the other surface side is used, and the total thickness thereof is set to the terminal insertion hole of the case. The width of the hole is slightly larger than the hole width, so that the elastic effect of the terminal increases the allowable range of the press-fitting allowance between the case and the terminal, thereby improving the productivity of the case and the terminal.
【００１８】（２）上記弾性効果により、ケースと端子
の圧入部のガタが防止できると共に圧入時のケースの欠
け，割れや、端子の変形などを防止できる。(2) Due to the above-mentioned elastic effect, it is possible to prevent backlash of the press-fit portion between the case and the terminal, and also to prevent chipping and cracking of the case at the time of press-fitting and deformation of the terminal.
【００１９】（３）ケースに端子を確実に圧入保持でき
るため、振動，衝撃や加湿などにも十分に耐え得る構成
となり、高信頼性が実現でき、また圧電振動板の適正な
振動を抑制することがなく、優れた音響特性を得ること
ができる。(3) Since the terminals can be securely pressed into and held in the case, the structure can sufficiently withstand vibration, impact, humidification, etc., and high reliability can be realized, and appropriate vibration of the piezoelectric vibration plate is suppressed. And excellent acoustic characteristics can be obtained.
【図１】本発明にかかる圧電サウンダの一実施例を示す
断面図FIG. 1 is a sectional view showing one embodiment of a piezoelectric sounder according to the present invention.
【図２】同要部断面図FIG. 2 is a sectional view of a main part of the same.
【図３】同圧電サウンダを構成する端子の下方より見た
拡大斜視図FIG. 3 is an enlarged perspective view of a terminal constituting the piezoelectric sounder as viewed from below.
【図４】従来例における圧電サウンダの断面図FIG. 4 is a sectional view of a conventional piezoelectric sounder.
【図５】同圧電サウンダを構成する端子の下方より見た
拡大斜視図FIG. 5 is an enlarged perspective view of a terminal constituting the piezoelectric sounder as viewed from below.
【図６】同圧電サウンダの要部断面図FIG. 6 is a sectional view of an essential part of the piezoelectric sounder.
１１ ケース １２ 放音孔 １３ 端子挿入孔 １４ 圧電振動板 １５ 圧電セラミック板 １６ 金属板 １７ 端子 １７ａ 凸部 １７ｂ 突き出し部 １７ｃ 接続部 １７ｄ 抜け止め用折曲部 １７ｅ 端末部 １８ 半田（または導電性接着剤） DESCRIPTION OF SYMBOLS 11 Case 12 Sound emission hole 13 Terminal insertion hole 14 Piezoelectric vibrating plate 15 Piezoelectric ceramic plate 16 Metal plate 17 Terminal 17a Convex part 17b Projection part 17c Connection part 17d Prevention bent part 17e Terminal part 18 Solder (or conductive adhesive) )
Claims (1)
ると共に他面側に上記凸部をはさみ、この凸部の突き出
し方向と反対方向に切断することなく突き出した一対の
突き出し部を設けてなる薄厚の金属板から構成された複
数個の端子と、天面に放音孔を有すると共に側壁に複数
個の挿入孔が形成された下面が開口している断面コの字
状のケースと、圧電振動板とより構成され、上記ケース
内に上記圧電振動板を装着し、上記各端子の凸部と一対
の突き出し部の総厚みをそれを挿入される上記端子挿入
孔の孔幅より若干大きく形成し、上記各端子を上記各端
子挿入孔にそれぞれ挿入して上記各端子の凸部と一対の
突き出し部を圧入保持すると共にその各端子を上記圧電
振動板に電気的機械的に接続してなる圧電サウンダ。1. A said protrusions on the other surface and having a convex portion in the longitudinal direction on one surface scissors, projecting of the projecting portion
A plurality of terminals formed of a thin metal plate provided with a pair of protrusions protruding without being cut in a direction opposite to the mounting direction, a plurality of insertion holes in a side wall having a sound emission hole on a top surface and a plurality of insertion holes in a side wall. Is formed of a U-shaped cross-section having an open lower surface, and a piezoelectric vibrating plate. The piezoelectric vibrating plate is mounted in the case, and a convex portion of each terminal and a pair of projecting portions are provided. Is formed to be slightly larger than the width of the terminal insertion hole into which it is inserted, and each of the terminals is inserted into each of the terminal insertion holes to form a pair with the projection of each terminal.
A piezoelectric sounder which press-fits and holds a protruding portion and electrically and mechanically connects each terminal to the piezoelectric vibrating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03058454A JP3136628B2 (en) | 1991-03-22 | 1991-03-22 | Piezoelectric sounder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03058454A JP3136628B2 (en) | 1991-03-22 | 1991-03-22 | Piezoelectric sounder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04293094A JPH04293094A (en) | 1992-10-16 |
| JP3136628B2 true JP3136628B2 (en) | 2001-02-19 |
Family
ID=13084873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03058454A Expired - Fee Related JP3136628B2 (en) | 1991-03-22 | 1991-03-22 | Piezoelectric sounder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3136628B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4900066B2 (en) * | 2007-06-12 | 2012-03-21 | ミツミ電機株式会社 | Manufacturing method of ultrasonic sensor |
| JPWO2016067667A1 (en) * | 2014-10-30 | 2017-08-17 | 京セラ株式会社 | SOUND GENERATOR, SOUND GENERATOR, AND ELECTRONIC DEVICE |
-
1991
- 1991-03-22 JP JP03058454A patent/JP3136628B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04293094A (en) | 1992-10-16 |
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