JPH0638399U - Piezoelectric transducer - Google Patents
Piezoelectric transducerInfo
- Publication number
- JPH0638399U JPH0638399U JP8035692U JP8035692U JPH0638399U JP H0638399 U JPH0638399 U JP H0638399U JP 8035692 U JP8035692 U JP 8035692U JP 8035692 U JP8035692 U JP 8035692U JP H0638399 U JPH0638399 U JP H0638399U
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric
- support
- vibrating plate
- receiving surface
- adhesive
- 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
- 239000000853 adhesive Substances 0.000 claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 claims abstract description 20
- 230000006866 deterioration Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
(57)【要約】
【目的】接着剤による周波数特性の劣化を軽減し得る圧
電変換器を提供する。
【構成】支持体１は、リング状内径孔１１を有し、内径
孔１１の周りにリング状受面１２を有し、受面１２上に
間隔を隔てて３個以上の突起１３が設けられている。圧
電振動板２は、圧電素子２１が振動板２２の一面側２２
１に付着され、振動板２２がいずれか一面側２２１を下
にして突起１３の上に配置され接着剤３によって支持体
１に接着されている。
(57) [Abstract] [Purpose] To provide a piezoelectric transducer capable of reducing deterioration of frequency characteristics due to an adhesive. The support 1 has a ring-shaped inner diameter hole 11, a ring-shaped receiving surface 12 around the inner diameter hole 11, and three or more protrusions 13 provided on the receiving surface 12 at intervals. ing. In the piezoelectric vibrating plate 2, the piezoelectric element 21 has one surface side 22 of the vibrating plate 22.
1, the vibration plate 22 is arranged on the projection 13 with one surface side 221 facing down, and is bonded to the support 1 by the adhesive 3.
Description
【０００１】[0001]
本考案は圧電変換器に関し、更に詳しくは、電話器やインターホン等に用いら れる圧電変換器の改良に係る。 The present invention relates to a piezoelectric transducer, and more particularly, to improvement of a piezoelectric transducer used in telephones, intercoms and the like.
【０００２】[0002]
従来の圧電変換器として、支持体と、圧電振動板とを有する構造のものが知ら れている。支持体はリング状の内径孔を有し、内径孔の周りにリング状の受面を 有する。圧電振動板は、振動板と、圧電素子を有し、圧電素子が振動板の一面側 に取付けられ、振動板の外周縁の全周が支持体の受面上に配置され接着剤によっ て接着されている。特開昭６１ー８９８００号公報には、支持体の受面にリング 状突起を設け、振動板を突起の上に配置し、接着剤によって支持体に接着した構 造が開示されているけれども、振動板は外周縁の全周が支持体によって受けられ 、かつ、同一の状態で支持体上に接着されている。 As a conventional piezoelectric transducer, one having a structure including a support and a piezoelectric vibrating plate is known. The support has a ring-shaped inner diameter hole, and has a ring-shaped receiving surface around the inner diameter hole. The piezoelectric vibrating plate has a vibrating plate and a piezoelectric element, the piezoelectric element is attached to one side of the vibrating plate, and the entire outer peripheral edge of the vibrating plate is arranged on the receiving surface of the support body by an adhesive. It is glued. Japanese Unexamined Patent Publication No. 61-89800 discloses a structure in which a ring-shaped protrusion is provided on the receiving surface of a support, a diaphragm is arranged on the protrusion, and the support is bonded to the support by an adhesive. The vibrating plate is supported by the support on the entire circumference of the outer peripheral edge, and is bonded on the support in the same state.
【０００３】[0003]
上述したように、従来の圧電変換器は、振動板の全周を支持体によって受け、 かつ、同一の状態で支持体上に接着する構造であるため、受面上に付着される接 着剤の影響を受けて周波数特性変動を招き易い。受面上への接着剤の付着量変動 、受面からの接着剤の垂れ等を生じた場合には、振動板の接着条件が変動し、音 響特性が変化する。多くの場合、接着剤による音響特性の変動は、低域周波数特 性が悪化する方向である。前述した従来技術は、上述の問題点解決には必ずしも 有効ではない。 As described above, the conventional piezoelectric transducer has a structure in which the entire circumference of the vibration plate is received by the support and is adhered to the support in the same state. It is easy to cause a frequency characteristic variation under the influence of. If the amount of adhesive adhered to the receiving surface fluctuates, or if the adhesive drips from the receiving surface, the bonding conditions of the diaphragm fluctuate and the acoustic characteristics change. In many cases, changes in acoustic characteristics due to the adhesive tend to deteriorate the low frequency characteristics. The above-mentioned conventional technique is not always effective in solving the above-mentioned problems.
【０００４】 そこで、本考案は上述する従来の問題点を解決し、接着剤による周波数特性の 劣化を軽減し得る圧電変換器を提供することである。Therefore, the present invention is to solve the above-mentioned conventional problems and provide a piezoelectric transducer capable of reducing the deterioration of the frequency characteristic due to the adhesive.
【０００５】[0005]
【課題を解決するための手段】 上述した課題解決のため、本考案は、支持体と、圧電振動板とを含む圧電変換 器であって、 前記支持体は、リング状の内径孔を有し、前記内径孔の周りにリング状の受面 を有し、前記受面上に間隔を隔てて３個の突起が設けられており、 前記圧電振動板は、圧電素子と、振動板とを有し、前記圧電素子が前記振動板 の一面側に付着され、前記振動板がいずれか一面側を下にして前記突起の上に配 置され接着剤によって前記支持体に接着されている。Means for Solving the Problems In order to solve the above problems, the present invention is a piezoelectric transducer including a support and a piezoelectric vibrating plate, wherein the support has a ring-shaped inner diameter hole. A ring-shaped receiving surface is provided around the inner diameter hole, and three protrusions are provided on the receiving surface at intervals. The piezoelectric vibrating plate includes a piezoelectric element and a vibrating plate. Then, the piezoelectric element is attached to one surface side of the diaphragm, and the diaphragm is placed on the protrusion with one surface side facing down and adhered to the support by an adhesive.
【０００６】[0006]
支持体は、リング状内径孔の周りにリング状の受面を有し、圧電振動板は、圧 電素子が振動板の一面側に付着され、振動板が圧電素子の付着されているいずれ か一面側を下にして接着剤によって支持体に接着されているから、音波による振 動板の振動を、圧電素子のピエゾ効果によって電気信号に変換して出力する圧電 変換器が得られる。 The support has a ring-shaped receiving surface around the ring-shaped inner diameter hole, and the piezoelectric vibrating plate has a piezoelectric element attached to one surface side of the vibrating plate, and the vibrating plate is attached with the piezoelectric element. Since the one surface side of the vibrating plate is adhered to the support body with an adhesive, the piezoelectric transducer that converts the vibration of the vibrating plate due to sound waves into an electric signal by the piezoelectric effect of the piezoelectric element and outputs the electric signal can be obtained.
【０００７】 支持体は、受面上に間隔を隔てて３個以上の突起が設けられており、圧電振動 板は振動板が突起の上に配置されているから、圧電振動板の安定支持に必要な三 点以上の支点が確保される。このため、圧電振動板を、傾斜させることなく、ほ ぼ水平の状態で安定に支持し、所定の周波数特性を確保することが可能になる。The support body is provided with three or more protrusions at intervals on the receiving surface, and the piezoelectric diaphragm has the diaphragm arranged on the protrusions, so that the piezoelectric diaphragm is stably supported. The required three or more fulcrums are secured. Therefore, it is possible to stably support the piezoelectric vibrating plate in a substantially horizontal state without tilting it and to secure a predetermined frequency characteristic.
【０００８】 支持体は、受面上に突起が設けられており、圧電振動板は振動板が突起の上に 配置され、接着剤によって支持体に接着されているから、全周支持の従来技術と 異なって、周波数特性、特に低域での周波数特性の悪化が回避できる。The support has a protrusion on the receiving surface, and the piezoelectric diaphragm has the diaphragm disposed on the protrusion and is adhered to the support by an adhesive. Unlike, it is possible to avoid the deterioration of the frequency characteristic, especially in the low frequency range.
【０００９】[0009]
図１は本考案に係る圧電変換器の分解斜視図、図２は図１のＡ２ーＡ２線上に おける断面図である。１は支持体、２は圧電振動板である。支持体１はリング状 の内径孔１１を有すると共に、内径孔１１の周りにリング状の受面１２を有する 。受面１２上には間隔を隔てて３個の突起１３が設けられている。支持体１は合 成樹脂等の適当な材料を用いて構成されている。内径孔１１及び受面１２は、共 に、円形状である。突起１３は三角状、四角状もしくは他の多角形状、または、 かまぼこ状等の形状を有し、３個以上設けられる。突起１３を支持体１の内壁面 １４及び１５から後退させ、突起１３の前後に凹部１６、１７を設けることもで きる。 FIG. 1 is an exploded perspective view of a piezoelectric transducer according to the present invention, and FIG. 2 is a sectional view taken along line A2-A2 of FIG. Reference numeral 1 is a support, and 2 is a piezoelectric diaphragm. The support 1 has a ring-shaped inner diameter hole 11 and a ring-shaped receiving surface 12 around the inner diameter hole 11. Three protrusions 13 are provided on the receiving surface 12 at intervals. The support 1 is made of an appropriate material such as synthetic resin. Both the inner diameter hole 11 and the receiving surface 12 are circular. The protrusions 13 have a triangular shape, a square shape, another polygonal shape, or a semicylindrical shape, and three or more protrusions 13 are provided. It is also possible to retract the protrusion 13 from the inner wall surfaces 14 and 15 of the support 1 and form recesses 16 and 17 in front of and behind the protrusion 13.
【００１０】 圧電振動板２は、圧電素子２１と、振動板２２とを有する。圧電素子２１は振 動板２２の一面２２１側に付着されている。圧電素子２１は圧電磁器２１１の相 対する両面に電極２１２、２１３を有する。振動板２２は通常、金属薄板で構成 される。圧電振動板２は振動板２２の一面２２１側を下にして突起１３の上に配 置され、接着剤３によって支持体１に接着されている。４、５はリード線であり 、圧電素子２１の電極２１２、２１３に接続されている。６は制動布である。The piezoelectric diaphragm 2 has a piezoelectric element 21 and a diaphragm 22. The piezoelectric element 21 is attached to the one surface 221 side of the vibration plate 22. The piezoelectric element 21 has electrodes 212 and 213 on both surfaces of the piezoelectric ceramic 211 which face each other. The diaphragm 22 is usually made of a thin metal plate. The piezoelectric vibrating plate 2 is arranged on the protrusion 13 with one surface 221 side of the vibrating plate 22 facing down, and is bonded to the support 1 by the adhesive 3. Lead wires 4 and 5 are connected to the electrodes 212 and 213 of the piezoelectric element 21. 6 is a braking cloth.
【００１１】 上述のように、支持体１はリング状内径孔１１の周りにリング状受面１２を有 し、圧電振動板２は、圧電素子２１が振動板２２の一面側に付着され、振動板２ ２が圧電素子２１の付着されている一面２２１側を下にして接着剤３によって支 持体１に接着されているから、音波による振動板２２の振動を、圧電素子２１の ピエゾ効果によって電気信号に変換して出力する圧電変換器が得られる。As described above, the support 1 has the ring-shaped receiving surface 12 around the ring-shaped inner diameter hole 11, and the piezoelectric vibrating plate 2 has the piezoelectric element 21 attached to one surface side of the vibrating plate 22 and vibrates. Since the plate 22 is bonded to the support 1 with the adhesive 3 with the one surface 221 side to which the piezoelectric element 21 is attached facing down, the vibration of the diaphragm 22 due to the sound wave is generated by the piezoelectric effect of the piezoelectric element 21. It is possible to obtain a piezoelectric converter that converts the electric signal and outputs the electric signal.
【００１２】 支持体１は、受面１２上に間隔を隔てて３個以上の突起１３が設けられており 、圧電振動板２は振動板２２が突起１３の上に配置されているから、圧電振動板 ２の安定支持に必要な三点以上の支点が確保される。このため、圧電振動板２を 、傾斜させることなく、ほぼ水平の状態で安定に支持し、所定の周波数特性を確 保することが可能になる。The support 1 is provided with three or more protrusions 13 on the receiving surface 12 at intervals, and the piezoelectric diaphragm 2 has the diaphragm 22 arranged on the protrusions 13. Three or more fulcrums required for stable support of the diaphragm 2 are secured. Therefore, it is possible to stably support the piezoelectric vibrating plate 2 in a substantially horizontal state without tilting it and to secure a predetermined frequency characteristic.
【００１３】 支持体１は、受面１２上に突起１３が設けられており、圧電振動板２は振動板 ２２が突起１３の上に配置され接着剤３によって支持体１に接着されているから 、全周支持の従来技術と異なって、周波数特性、特に低域での周波数特性の劣化 が小さくなる。The support 1 is provided with the protrusion 13 on the receiving surface 12, and the piezoelectric diaphragm 2 has the diaphragm 22 arranged on the protrusion 13 and adhered to the support 1 by the adhesive 3. Unlike the conventional technique of supporting the entire circumference, deterioration of the frequency characteristic, particularly in the low frequency range, is reduced.
【００１４】 図３は周波数ー音圧特性を示す図である。図において、横軸に共振周波数（ｋ Ｈｚ）をとり、縦軸に音圧（ｄＢ）をとってある。曲線Ｌ１は本考案に係る圧電 変換器における圧電振動板の共振特性、曲線Ｌ２は従来の圧電変換器における圧 電振動板の共振特性、Ｌ３はケースの空洞共振特性、Ｌ４は制動布６をも考慮し た合成特性をそれぞれ示している。従来の圧電変換器は振動板の全周を支持体で 支持した構造を有する。図示するように、本考案に係る圧電変換器は、圧電振動 板２の共振特性Ｌ２が、全周支持の従来技術の特性Ｌ２よりも、例えば３００Ｈ ｚ程度低域側に移動している。このため、低域特性の優れた圧電変換器が得られ る。FIG. 3 is a diagram showing frequency-sound pressure characteristics. In the figure, the horizontal axis represents the resonance frequency (kHz) and the vertical axis represents the sound pressure (dB). The curve L1 is the resonance characteristic of the piezoelectric diaphragm in the piezoelectric transducer according to the present invention, the curve L2 is the resonance characteristic of the piezoelectric diaphragm in the conventional piezoelectric transducer, L3 is the cavity resonance characteristic of the case, and L4 is the damping cloth 6. The synthetic characteristics considered are shown respectively. A conventional piezoelectric transducer has a structure in which the entire circumference of the diaphragm is supported by a support. As shown in the figure, in the piezoelectric transducer according to the present invention, the resonance characteristic L2 of the piezoelectric vibration plate 2 is moved to the lower frequency side by, for example, about 300 Hz than the characteristic L2 of the conventional technique of supporting all around. Therefore, a piezoelectric transducer with excellent low frequency characteristics can be obtained.
【００１５】 図示する如く、突起１３を支持体１の内壁面１４及び１５から後退させ、突起 １３の前後に凹部１６、１７を設けた構造の場合、凹部１６、１７が接着剤３を プールする領域となるので、接着剤３の垂れや塗布量変動等が抑制され、更に良 好な結果が得られる。As shown in the figure, in the case of the structure in which the protrusion 13 is retracted from the inner wall surfaces 14 and 15 of the support 1 and the recesses 16 and 17 are provided before and after the protrusion 13, the recesses 16 and 17 pool the adhesive 3. Since it becomes the area, the sagging of the adhesive 3 and the variation of the coating amount are suppressed, and more favorable results are obtained.
【００１６】[0016]
以上述べたように、本考案によれば次ような効果を得ることができる。 （ａ）支持体は、リング状内径孔の周りにリング状の受面を有し、圧電振動板は 、圧電素子が振動板の一面側に付着され、振動板が圧電素子の付着されているい ずれか一面側を下にして接着剤によって支持体に接着されているから、音波によ る振動板の振動を、圧電素子のピエゾ効果によって電気信号に変換して出力する 圧電変換器を提供できる。 （ｂ）支持体は、受面上に間隔を隔てて３個以上の突起が設けられており、圧電 振動板は振動板が突起の上に配置されているから圧電振動板を、傾斜させること なく、ほぼ水平の状態で安定に支持し、所定の周波数特性を有する圧電変換器を 提供できる。 （ｃ）支持体は、受面上に突起が設けられており、圧電振動板は振動板が突起の 上に配置され接着剤によって支持体に接着されているから、全周支持の従来技術 と異なって、特に低域での周波数特性の優れた圧電変換器を提供できる。 As described above, according to the present invention, the following effects can be obtained. (A) The support has a ring-shaped receiving surface around the ring-shaped inner diameter hole, and the piezoelectric vibrating plate has the piezoelectric element attached to one surface side of the vibrating plate and the vibrating plate having the piezoelectric element attached. It is possible to provide a piezoelectric transducer that converts the vibration of the vibration plate due to sound waves into an electric signal by the piezoelectric effect of the piezoelectric element and is output because it is bonded to the support with an adhesive, with one side facing down . (B) The support is provided with three or more protrusions at intervals on the receiving surface, and the piezoelectric diaphragm has the diaphragm disposed on the protrusion, so the piezoelectric diaphragm should be tilted. In other words, it is possible to provide a piezoelectric transducer which is stably supported in a substantially horizontal state and has a predetermined frequency characteristic. (C) The support is provided with a protrusion on the receiving surface, and the piezoelectric vibrating plate is arranged on the protrusion and is adhered to the support by an adhesive. Differently, it is possible to provide a piezoelectric transducer having an excellent frequency characteristic particularly in a low frequency range.
【図１】本考案に係る圧電変換器の分解斜視図である。FIG. 1 is an exploded perspective view of a piezoelectric transducer according to the present invention.
【図２】図１に示した圧電変換器の断面図である。FIG. 2 is a sectional view of the piezoelectric converter shown in FIG.
【図３】周波数ー音圧特性を示す図である。FIG. 3 is a diagram showing frequency-sound pressure characteristics.
１ 支持体 １１ 内径孔 １２ 受面 １３ 突起 ２ 圧電振動板 ２１ 圧電素子 ２２ 振動板 ３ 接着剤 DESCRIPTION OF REFERENCE NUMERALS 1 support 11 inner diameter hole 12 receiving surface 13 protrusion 2 piezoelectric vibrating plate 21 piezoelectric element 22 vibrating plate 3 adhesive
Claims (1)
器であって、 前記支持体は、リング状の内径孔を有し、前記内径孔の
周りにリング状の受面を有し、前記受面上に間隔を隔て
て３個以上の突起が設けられており、 前記圧電振動板は、圧電素子と、振動板とを有し、前記
圧電素子が前記振動板の一面側に付着され、前記振動板
がいずれか一面側を下にして前記突起の上に配置され接
着剤によって前記支持体に接着されている圧電変換器。1. A piezoelectric transducer including a support and a piezoelectric vibrating plate, wherein the support has a ring-shaped inner diameter hole, and a ring-shaped receiving surface around the inner diameter hole. , Three or more protrusions are provided at intervals on the receiving surface, the piezoelectric vibrating plate has a piezoelectric element and a vibrating plate, and the piezoelectric element is attached to one surface side of the vibrating plate. A piezoelectric transducer in which the vibrating plate is placed on one side of the protrusion with one surface thereof facing down and is adhered to the support by an adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8035692U JPH0638399U (en) | 1992-10-27 | 1992-10-27 | Piezoelectric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8035692U JPH0638399U (en) | 1992-10-27 | 1992-10-27 | Piezoelectric transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0638399U true JPH0638399U (en) | 1994-05-20 |
Family
ID=13715976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8035692U Pending JPH0638399U (en) | 1992-10-27 | 1992-10-27 | Piezoelectric transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638399U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012156622A (en) * | 2011-01-24 | 2012-08-16 | Tamura Seisakusho Co Ltd | Piezoelectric sensor |
| JP2013157740A (en) * | 2012-01-27 | 2013-08-15 | Taiheiyo Cement Corp | Parametric speaker and manufacturing method of the same |
| JP2017028576A (en) * | 2015-07-24 | 2017-02-02 | 京セラ株式会社 | SOUND GENERATOR, SOUND GENERATOR HAVING THE SAME, AND ELECTRONIC DEVICE |
| JP2022172901A (en) * | 2021-05-07 | 2022-11-17 | Tdk株式会社 | acoustic device |
-
1992
- 1992-10-27 JP JP8035692U patent/JPH0638399U/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012156622A (en) * | 2011-01-24 | 2012-08-16 | Tamura Seisakusho Co Ltd | Piezoelectric sensor |
| JP2013157740A (en) * | 2012-01-27 | 2013-08-15 | Taiheiyo Cement Corp | Parametric speaker and manufacturing method of the same |
| JP2017028576A (en) * | 2015-07-24 | 2017-02-02 | 京セラ株式会社 | SOUND GENERATOR, SOUND GENERATOR HAVING THE SAME, AND ELECTRONIC DEVICE |
| JP2022172901A (en) * | 2021-05-07 | 2022-11-17 | Tdk株式会社 | acoustic device |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990330 |