JPH0224316Y2 - - Google Patents
Info
- Publication number
- JPH0224316Y2 JPH0224316Y2 JP14584384U JP14584384U JPH0224316Y2 JP H0224316 Y2 JPH0224316 Y2 JP H0224316Y2 JP 14584384 U JP14584384 U JP 14584384U JP 14584384 U JP14584384 U JP 14584384U JP H0224316 Y2 JPH0224316 Y2 JP H0224316Y2
- Authority
- JP
- Japan
- Prior art keywords
- compression force
- piezoelectric element
- annular piezoelectric
- dome
- shaped shell
- 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
- 230000006835 compression Effects 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案は円環状圧電素子に予備圧縮力を印加す
る方法及び上記円環圧電素子を振動源として組込
んだ振動子に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method of applying a pre-compression force to an annular piezoelectric element and a vibrator incorporating the annular piezoelectric element as a vibration source.
〔考案の背景〕
円環状圧電素子の半径方向の振動により、音響
放射する方式の振動子は、第５図、第６図に示す
従来技術の例の如く、振動源となる円環状圧電素
子３の外周部の箇所を、固定用金具２１および保
護用ゴム２２をネジ５で固定する構造となつてい
る。上記のような構造では円環状圧電素子３の半
径方向に予備圧縮力が印加されていないため、圧
電素子は一般的に圧縮力よりも引張力に弱いの
で、第４図に破線で示す如く、圧電素子に印加さ
れる交番応力１８の振幅１６が引張応力限界１７
を越えてしまい引張破壊されやすい。[Background of the invention] A vibrator that emits sound by vibration in the radial direction of an annular piezoelectric element uses an annular piezoelectric element 3 as a vibration source, as shown in the prior art example shown in FIGS. 5 and 6. It has a structure in which a fixing fitting 21 and a protective rubber 22 are fixed with screws 5 at the outer circumferential portion thereof. In the above structure, no pre-compression force is applied in the radial direction of the annular piezoelectric element 3, and piezoelectric elements are generally weaker against tensile force than compressive force, so as shown by the broken line in FIG. The amplitude 16 of the alternating stress 18 applied to the piezoelectric element is the tensile stress limit 17
It is easy to break due to tension.
上記の構造のままで、引張破壊を避けるために
は、圧電素子に印加される応力振幅を小さく限定
する必要がある。従つて、振動子としての音響出
力を大きく出来ない欠点がある。本考案では、上
記欠点を改善するために、円環状圧電素子に予備
圧縮力を加える方法を工夫した。 In order to avoid tensile failure while maintaining the above structure, it is necessary to limit the stress amplitude applied to the piezoelectric element to a small value. Therefore, there is a drawback that the acoustic output as a vibrator cannot be increased. In the present invention, in order to improve the above-mentioned drawbacks, a method of applying preliminary compression force to the annular piezoelectric element has been devised.
本考案の目的は、上記した従来技術の欠点をな
くすため、第３図と第５図に示す如く、円環状圧
電素子３と密着固定された球面ドーム状シエル２
の両者に同時に、中心軸方向の予備圧縮力２０
が、水密カバーを兼る予備圧縮力印加用部材１に
よつて、印加される構造を提供することにある。
上記構造にすることによつて、円環状圧電素子３
に交番電圧が印加されても、円環状圧電素子３に
は常に圧縮応力のみが加わるようになるため、引
張応力による破壊を防止出来る。
The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, as shown in FIGS.
At the same time, a preliminary compression force of 20 in the central axis direction is applied to both of the
The object of the present invention is to provide a structure in which the precompression force is applied by the member 1 for applying preliminary compression force which also serves as a watertight cover.
By having the above structure, the annular piezoelectric element 3
Even if an alternating voltage is applied to the annular piezoelectric element 3, only compressive stress is always applied to the annular piezoelectric element 3, so that destruction due to tensile stress can be prevented.
本考案は円環状圧電素子の呼吸振動により球面
ドーム状シエルがピストン振動をするように予備
圧縮力印加用部材をもつて径方向予備圧縮力を印
加するように構成して、上記球面ドーム状シエル
から水中へ低周波音波を送波し、または受波する
ことを目的としたドーム型振動子において、ネジ
を締めることによつて、上記円環状圧電素子と密
着固定された上記球面ドーム状シエルのテーパー
部を上記予備圧縮力印加用部材のテーパー部で押
すことによつて、上記円環状圧電素子に予備圧縮
力を伝達することを特徴とするものである。
The present invention is configured to apply a radial preliminary compression force to the spherical dome-shaped shell using a pre-compression force applying member so that the spherical dome-shaped shell vibrates as a piston due to the respiratory vibration of the annular piezoelectric element. In a dome-shaped vibrator intended for transmitting or receiving low-frequency sound waves from water to water, the spherical dome-shaped shell is tightly fixed to the annular piezoelectric element by tightening screws. The pre-compression force is transmitted to the annular piezoelectric element by pressing the tapered portion with the taper portion of the member for applying pre-compression force.
第１図、第２図に本考案の実施例を示す。円環
状圧電素子３に球面ドーム状シエル２が密着固定
され、予備圧縮力印加用部材１が上記球面ドーム
状シエル２にネジ５で締め付け固定されている。
さらに、水密用ｏリング４が球面ドーム状シエル
２と予備圧縮力印加用部材１の間に配置されてい
る。上記の構成において、円環状圧電素子３の正
電極６と負電極７の間に交番電圧を印加した時
に、第４図に実線で示すような交番応力１９、即
ち、予備圧縮力１２が応力振幅１１よりも大き
く、かつ、方向が圧縮方向１４である応力が加わ
るようにするために、ネジ５を締めることによつ
て、予備圧縮力印加用部材１のテーパー部８が球
面ドーム状シエル２のテーパー部８を押し、圧縮
力２０が円環状圧電素子３に伝達され、予備圧縮
力１２が加えられた状態となる。上記の構造によ
つて、円環状圧電素子３に予備圧縮力１２が加え
られるため、引張破壊が防止可能となるととも
に、第３図に示すネジ５の締めシロ９と水密用ｏ
リング４のつぶしシロ１０の関係を調整すること
により、予備圧縮力印加用部材１が水密用カバー
を兼用出来る。
An embodiment of the present invention is shown in FIGS. 1 and 2. A spherical dome-shaped shell 2 is closely fixed to the annular piezoelectric element 3, and a preliminary compressive force applying member 1 is tightened and fixed to the spherical dome-shaped shell 2 with screws 5.
Further, a watertight O-ring 4 is disposed between the spherical dome-shaped shell 2 and the pre-compression force applying member 1. In the above configuration, when an alternating voltage is applied between the positive electrode 6 and the negative electrode 7 of the annular piezoelectric element 3, the alternating stress 19 as shown by the solid line in FIG. In order to apply a stress greater than 11 and in the compression direction 14, by tightening the screw 5, the tapered part 8 of the preliminary compression force applying member 1 is applied to the spherical dome-shaped shell 2. By pressing the tapered portion 8, a compressive force 20 is transmitted to the annular piezoelectric element 3, and a preliminary compressive force 12 is applied. With the above structure, a preliminary compression force 12 is applied to the annular piezoelectric element 3, which makes it possible to prevent tensile breakage, and also tighten the screw 5 with the tightening margin 9 shown in FIG.
By adjusting the relationship between the crushing margins 10 of the ring 4, the preliminary compression force applying member 1 can also serve as a watertight cover.
円環状圧電素子に予備圧縮力を印加出来る構造
にしたことにより、引張破壊を防止出来るとと
も、予備圧縮力印加用部材が水密用カバーを兼ね
ることが出来、経済的である。
By adopting a structure in which preliminary compression force can be applied to the annular piezoelectric element, tensile failure can be prevented, and the member for applying preliminary compression force can also serve as a watertight cover, which is economical.
第１図は本考案の実施例の断面図、第２図は第
１図のＡ−Ａ断面図、第３図は第１図のネジ５を
省略したＢ部拡大図、第４図は円環状圧電素子に
加わる交番応力と時間の関係図、第５図は、従来
技術実施例の断面図、第６図は第５図の主要部を
Ａ方向から見た断面図である。
１……予備圧縮力印加用部材、２……球面ドー
ム状シエル、３……円環状圧電素子、４……水密
用ｏリング、５……ネジ、６……正電極、７……
負電極、８……テーパー部、９……締めシロ、１
０……つぷしシロ、１１……応力振幅、１２……
予備圧縮力、１３……時間、１４……圧縮方向、
１５……引張方向、１６……応力振幅、１７……
引張応力限界、１８……交番応力、１９……交番
応力、２０……圧縮力。
Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is an enlarged view of part B in Fig. 1 with screw 5 omitted, and Fig. 4 is a circle. A diagram showing the relationship between alternating stress applied to an annular piezoelectric element and time. FIG. 5 is a sectional view of a prior art embodiment, and FIG. 6 is a sectional view of the main part of FIG. 5 viewed from direction A. DESCRIPTION OF SYMBOLS 1... Member for applying preliminary compression force, 2... Spherical dome-shaped shell, 3... Annular piezoelectric element, 4... Watertight O-ring, 5... Screw, 6... Positive electrode, 7...
Negative electrode, 8... Taper part, 9... Tightening white, 1
0...Tsubushishiro, 11...Stress amplitude, 12...
Preliminary compression force, 13...time, 14...compression direction,
15...Tensile direction, 16...Stress amplitude, 17...
Tensile stress limit, 18... Alternating stress, 19... Alternating stress, 20... Compressive force.
Claims (1)
シエルがピストン振動をするように予備圧縮力印
加用部材をもつて径方向予備圧縮力を印加するよ
うに構成して、上記球面ドーム状シエルから水中
へ低周波音波を送波し、または受波することを目
的としたドーム型振動子において、ネジを締める
ことによつて、上記円環状圧電素子と密着固定さ
れた上記球面ドーム状シエルのテーパー部を上記
予備圧縮力印加用部材のテーパー部で押すことに
よつて、上記円環状圧電素子に予備圧縮力を伝達
することを特徴とするドーム型振動子の予備圧縮
力印加機構。 A pre-compression force applying member is configured to apply a pre-compression force in the radial direction so that the spherical dome-shaped shell vibrates as a piston due to the breathing vibration of the annular piezoelectric element, and the spherical dome-shaped shell is inserted into the water. In a dome-shaped vibrator intended for transmitting or receiving low-frequency sound waves, the tapered portion of the spherical dome-shaped shell that is tightly fixed to the annular piezoelectric element is tightened by tightening the screw. A pre-compression force applying mechanism for a dome-shaped vibrator, characterized in that a pre-compression force is transmitted to the annular piezoelectric element by pressing with a tapered portion of the pre-compression force application member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14584384U JPH0224316Y2 (en) | 1984-09-28 | 1984-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14584384U JPH0224316Y2 (en) | 1984-09-28 | 1984-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6162498U JPS6162498U (en) | 1986-04-26 |
| JPH0224316Y2 true JPH0224316Y2 (en) | 1990-07-03 |
Family
ID=30704095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14584384U Expired JPH0224316Y2 (en) | 1984-09-28 | 1984-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224316Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2556150B2 (en) * | 1989-11-07 | 1996-11-20 | 株式会社村田製作所 | Ultrasonic irradiation device |
| JP2007027856A (en) * | 2005-07-12 | 2007-02-01 | Tdk Corp | Piezoelectric sounder |
-
1984
- 1984-09-28 JP JP14584384U patent/JPH0224316Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6162498U (en) | 1986-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0224316Y2 (en) | ||
| JPS6126399U (en) | Pre-compression force application mechanism for dome-shaped vibrator | |
| JPS6286799U (en) | ||
| JPS6315457Y2 (en) | ||
| JPS5915194Y2 (en) | Languevin type vibrator for high amplitude | |
| JPH0133814Y2 (en) | ||
| JPS6242006Y2 (en) | ||
| JPH0320788Y2 (en) | ||
| JPH01148119U (en) | ||
| JPH0357071Y2 (en) | ||
| JPH0215438Y2 (en) | ||
| JPS641619Y2 (en) | ||
| JPS61195694U (en) | ||
| JPH03250897A (en) | Electroacoustic converter | |
| JPS58163786U (en) | pipe support device | |
| JPS6129126Y2 (en) | ||
| JPS60196083U (en) | Piping fixing device | |
| JPS62199577U (en) | ||
| JPS61179898U (en) | ||
| JPS6254388U (en) | ||
| JPH01169382A (en) | Oval cylinder bending type transducer | |
| JPS6412935U (en) | ||
| JPH03122808U (en) | ||
| JPS6381496U (en) | ||
| JPS6312726U (en) |