JP2721774B2 - Mounting structure of piezoelectric sounding body - Google Patents
Mounting structure of piezoelectric sounding bodyInfo
- Publication number
- JP2721774B2 JP2721774B2 JP4244565A JP24456592A JP2721774B2 JP 2721774 B2 JP2721774 B2 JP 2721774B2 JP 4244565 A JP4244565 A JP 4244565A JP 24456592 A JP24456592 A JP 24456592A JP 2721774 B2 JP2721774 B2 JP 2721774B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric
- storage case
- sounding body
- opening
- waterproof sheet
- 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 - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 239000000463 material Substances 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000012945 sealing adhesive Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 238000004078 waterproofing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Telephone Set Structure (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、送受話器と電話器本
体とを分離独立させて無線通信により音声を送受するよ
うに構成された所謂コードレス電話器、および自由に持
ち運びが可能な携帯電話器において、送話部または受話
部に内蔵されて音声信号と電圧値との変換を行うように
構成された電気音響変換器、所謂圧電発音体の取付構造
に関し、さらに詳細には、前記電話器を浴室または洗面
所等の飛水或いは多湿環境にて使用する際に、水滴・湿
気等が侵入するのを防止するとともに、該防水性対策に
よる音圧劣化が少ないように構成された電話器用の圧電
発音体の取付構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called cordless telephone which is constructed so that a handset and a telephone main body are separated and independent to transmit and receive voice by wireless communication, and a portable telephone which can be freely carried. In, an electroacoustic transducer built in a transmitting unit or a receiving unit and configured to perform conversion between an audio signal and a voltage value, a mounting structure of a so-called piezoelectric sounding body, more particularly, the telephone When used in flying or humid environments such as bathrooms or washrooms, a piezoelectric device for telephones configured to prevent water droplets and moisture from entering, and to reduce sound pressure deterioration due to the waterproofness measures. The present invention relates to a sounding body mounting structure.
【０００２】[0002]
【従来の技術】近年の高度情報化時代に対応して、電話
回線を介しての各種情報提供或いは通話等が多岐多様に
亙ってきており、これにともない該電話の使用場所も、
例えば高温多湿環境の下でも使用可能なように水滴・湿
気対策が施された電話器が切望されている。2. Description of the Related Art In response to the recent era of advanced information, various information provisions or telephone calls have been made over a wide variety of telephone lines.
For example, there is a long-felt need for a telephone that is provided with measures against water droplets and moisture so that it can be used even in a high-temperature and high-humidity environment.
【０００３】特に、送受話部と電話器本体とが分離独立
されて無線通信により音声を送受するように構成された
所謂コードレス電話器は屋内での移動が可能であること
から、上記のような高温多湿環境の浴室または洗面所等
においての使用形態が不可避であって水滴および湿気の
対策が必要である。In particular, a so-called cordless telephone in which a transmitting / receiving section and a telephone main body are separated and independent to transmit and receive voice by wireless communication can be moved indoors. It is unavoidable to use it in a bathroom or washroom in a high-temperature and high-humidity environment, and it is necessary to take measures against water droplets and moisture.
【０００４】また、自由に持ち運びができる携帯電話も
サービス網の拡大、低価格化が進み、急速に普及してい
るが、室外での使用においては厳しい使用環境に耐え得
る信頼性が要求されるのであって、水滴および湿気に対
する対策も当然に施される必要がある。[0004] In addition, portable telephones that can be freely carried are rapidly becoming widespread due to the expansion of service networks and the reduction in prices, but their reliability in outdoor use is required to withstand severe use environments. Therefore, it is necessary to naturally take measures against water droplets and moisture.
【０００５】一方、前記コードレス電話器や携帯電話器
においては、小型化の要求が強いのであるが、内蔵され
る無線通信の電子回路および電源部等がある程度の容積
が必要なことと相俟って、送受話器部の小型薄型化が不
可避となっている。On the other hand, although there is a strong demand for miniaturization of the above-mentioned cordless telephones and portable telephones, this is combined with the fact that the electronic circuits for wireless communication, the power supply unit and the like need to have a certain volume. Therefore, it is inevitable to make the handset unit small and thin.
【０００６】上記要請を満足するために、送話部及び受
話部に従来使用されていた電磁作用を利用した電磁スピ
ーカに代わって圧電作用を利用した圧電振動板を内蔵す
る圧電発音体が採用されるに至っている。In order to satisfy the above demand, a piezoelectric sounding body having a built-in piezoelectric diaphragm utilizing a piezoelectric action is employed in place of an electromagnetic speaker utilizing an electromagnetic action conventionally used in a transmitting section and a receiving section. Has been reached.
【０００７】現在、上記電話器用の圧電発音体は本来も
っている小型・薄型・省電力の特徴に加えて、高音圧化
さらには実装性の向上に対する要求に応えるべく開発が
進められている。At present, the piezoelectric sounding body for telephones has been developed to meet the demands for higher sound pressure and improved mountability in addition to the inherent features of small size, thin shape and power saving.
【０００８】前記圧電振動板が適用された従来の圧電発
音体並びに該圧電発音体が送受話器本体に取付られた構
造を、図２の断面図を参照することにより概説する。A conventional piezoelectric sounding body to which the piezoelectric vibrating plate is applied and a structure in which the piezoelectric sounding body is attached to a handset main body will be outlined with reference to a sectional view of FIG.
【０００９】先ず、圧電素子２１は、圧電音響変換を行
う素子であり、力を加えると誘電分極をおこす強誘電体
セラミックスを材質として薄円板状に形成されている。First, the piezoelectric element 21 is an element for performing piezoelectric acoustic conversion, and is formed in a thin disk shape using ferroelectric ceramics which causes dielectric polarization when a force is applied.
【００１０】該圧電素子２１の両端面には、電極が塗着
形成されている。Electrodes are formed on both ends of the piezoelectric element 21 by coating.
【００１１】前記電極が形成された圧電素子２１は、該
圧電素子２１よりも大形であって薄円板状に形成された
振動板２２の振動板表面２２ａに、一方の電極を介在し
て固着されることにより圧電振動板２０が構成されてい
る。The piezoelectric element 21 on which the electrodes are formed is provided on one side of a vibration plate surface 22a of a vibration plate 22 which is larger than the piezoelectric element 21 and formed in a thin disk shape. The piezoelectric vibrating plate 20 is formed by being fixed.
【００１２】また、図示しないが、前記圧電振動板２０
における圧電素子２１に被着された他方の電極の一端部
及び前記振動板表面２２ａの一端部には、外部との電気
的信号の授受を行うための絶縁被覆導線が半田固定され
るとともに、該圧電振動板２０のハウジング基体となる
収納ケース１１より導出されているものとする。Although not shown, the piezoelectric diaphragm 20
At one end of the other electrode attached to the piezoelectric element 21 and at one end of the diaphragm surface 22a, an insulated conductor for transmitting and receiving an electric signal to and from the outside is fixed by soldering. It is assumed that the piezoelectric vibrating plate 20 is led out of the storage case 11 serving as a housing base.
【００１３】次に、上記収納ケース１１は合成樹脂等を
材質として、環状または多角形状を有する側壁と、一方
が全面開口された収納用開口１２と、該収納用開口１２
に相対した開口相対壁部１９と、を有することにより断
面が略凹形状に成形されている。Next, the storage case 11 is made of synthetic resin or the like, and is formed of a side wall having an annular or polygonal shape, a storage opening 12 having one opening entirely, and a storage opening 12.
And an opening-relative wall portion 19 that is opposed to the above, so that the cross section is formed into a substantially concave shape.
【００１４】前記開口相対壁部１９の略中心部には、制
動孔１３が開口されており、該制動孔１３に収納ケース
１１の内側において、メッシュ状に構成された音圧調整
膜１８が被覆され、さらに接着剤により固着されること
により、前記圧電振動板２０の圧電振動に対する音圧ー
周波数特性が調整できるように構成されている。At substantially the center of the opening relative wall portion 19, a braking hole 13 is formed, and the braking hole 13 is covered with a sound pressure adjusting film 18 formed in a mesh shape inside the storage case 11. The sound pressure-frequency characteristic of the piezoelectric vibration plate 20 with respect to the piezoelectric vibration can be adjusted by being fixed with an adhesive.
【００１５】前記収納ケース１１の内壁面の略中央部に
は、該内面全周に亙って取付段部１４が設けられてお
り、前記圧電振動板２０が、圧電素子２１を開口相対壁
部１９側に対向するように、前記収納用開口１２を介し
て収納ケース１１に収納されるとともに、該取付段部１
４において該圧電振動板２０の振動板周辺部２２ｂが当
接され、さらに、例えばシリコーン系のシール用接着材
１６により固定されている。At substantially the center of the inner wall surface of the storage case 11, a mounting step 14 is provided over the entire inner surface, and the piezoelectric vibration plate 20 allows the piezoelectric element 21 to move the piezoelectric element 21 to the opening relative wall portion. The storage step 11 is accommodated in the storage case 11 through the storage opening 12 so as to face the side of the mounting step 1.
At 4, the vibrating plate peripheral portion 22 b of the piezoelectric vibrating plate 20 abuts and is further fixed by, for example, a silicone sealing adhesive 16.
【００１６】次に、上記のようにして構成された圧電発
音体１０を、前記電話器における送受話器本体３０に取
り付けた状態の取付構造を説明する。Next, a description will be given of a mounting structure in which the piezoelectric sounding body 10 configured as described above is mounted on the handset 30 of the telephone.
【００１７】図２において、該送受話器本体３０は、本
発明の主要部となる送話口部または受話口部を示してお
り、該部は前記圧電発音体１０が取り付けられる取付基
材３１になっている。In FIG. 2, the handset main body 30 shows a mouthpiece or earpiece as a main part of the present invention, and this part is attached to a mounting base 31 on which the piezoelectric sounding body 10 is mounted. Has become.
【００１８】該取付基材３１には、送話音または受話音
等を通過させるための音通孔３２，３２´…が開口され
ている。The mounting base 31 is provided with sound holes 32, 32 '... For transmitting a transmission sound or a reception sound.
【００１９】また、前記送受話器本体３０における取付
基材３１の搭載面３４には、前記圧電発音体１０の収納
用開口１２側における開口縁１５の形状に対応して嵌装
用凸部３３が突設されている。On the mounting surface 34 of the mounting base material 31 of the handset main body 30, a fitting projection 33 protrudes corresponding to the shape of the opening edge 15 on the storage opening 12 side of the piezoelectric sounding body 10. Has been established.
【００２０】この状態において、前記圧電発音体１０の
収納ケース１１の開口縁１５が、該搭載面３４における
嵌装用凸部３３に嵌装されるとともに、接着固定される
ことにより、該圧電発音体１０が取付基材３１に搭載さ
れている。In this state, the opening edge 15 of the storage case 11 of the piezoelectric sounding body 10 is fitted into the fitting projection 33 on the mounting surface 34 and is fixed by bonding, so that the piezoelectric sounding body 10 is bonded. 10 is mounted on the mounting substrate 31.
【００２１】この際、収納ケース１１の開口縁１５に沿
って周設された非通気性弾性体部材であるゴムリング２
６を介して防水性シート２５が開口全面を閉塞するよう
に搭載面３４に当接しつつ圧着され、音通孔３２、３２
´…を通しての外部からの水滴または湿気の侵入を防止
する構造となっている。At this time, the rubber ring 2 which is a non-breathable elastic member provided along the opening edge 15 of the storage case 11
6, the waterproof sheet 25 is pressed against the mounting surface 34 so as to close the entire opening, and the sound through holes 32, 32 are provided.
The structure prevents water droplets or moisture from entering from outside through.
【００２２】上記防水性シート２５は音声等を通過する
ように或程度の通気性を有するとともに、水滴または湿
気等を防滴する撥水性を有する材質で構成されている。The waterproof sheet 25 is made of a material having a certain degree of air permeability so as to allow voices and the like to pass therethrough, and a water repellent material for preventing water droplets or moisture.
【００２３】[0023]
【発明が解決しようとする課題】しかしながら、上記従
来の圧電発音体１０の取付構造によれば、防水性シート
２５は送受話器本体３０における取付基材３１の搭載面
３４に当接しつつ該周辺部が弾性体部材のゴムリング２
６にて搭載面３４に圧着固定されているので、防水性シ
ート２５自体は殆ど振動することができず、或程度の通
気性を有するとはいえ、音圧の劣化の原因となってい
る。However, according to the above-described conventional structure for mounting the piezoelectric sounding body 10, the waterproof sheet 25 comes into contact with the mounting surface 34 of the mounting base material 31 of the handset main body 30 while being in contact with the peripheral portion. Is an elastic member rubber ring 2
Since the waterproof sheet 25 itself is hardly vibrated because it is pressure-bonded and fixed to the mounting surface 34 at 6, the sound pressure is reduced even though it has a certain degree of air permeability.
【００２４】即ち、送話器においては音通孔３２、３２
´…を通しての話し手の声の音圧の変化を圧電振動板２
０に伝えにくくする障害物となり、また受話器において
は圧電振動板２０の発音による音圧の変化を音通孔３
２、３２´…を通して聞き手に伝えにくくする障害物と
なり、音圧の減少を招く原因となるという問題点があっ
た。That is, in the transmitter, the sound holes 32, 32
The change in the sound pressure of the speaker's voice through the ´… piezoelectric diaphragm 2
In the handset, a change in sound pressure caused by the sound of the piezoelectric diaphragm 20 is transmitted to the sound hole 3.
There is a problem that the obstacle becomes difficult to communicate to the listener through 2, 32 ', and causes a decrease in sound pressure.
【００２５】本発明は、上記事情に鑑みてなされたもの
であり、前記コードレス電話器や携帯電話器を浴室また
は洗面所等の飛水或いは多湿環境下において使用する際
に、例え水滴等による被着が発生しても継続通話を行う
ことが可能なように、該水滴または湿気等の侵入を防止
するとともに、音圧劣化を少なくした構造の圧電発音体
の取付構造を提供するものである。The present invention has been made in view of the above circumstances, and when the cordless telephone or the portable telephone is used under flying or humid environment such as a bathroom or a washroom, the cordless telephone or the portable telephone is subject to, for example, water drops. An object of the present invention is to provide a mounting structure of a piezoelectric sounding body having a structure in which the intrusion of water droplets or moisture is prevented and sound pressure deterioration is reduced so that a continuous call can be made even if a call occurs.
【００２６】[0026]
【課題を解決するための手段】本発明は、一方が全面開
口されるとともに該開口に相対する壁部に制動孔を有す
る収納ケースと、振動板の表面に圧電素子が固着される
とともに該振動板の周辺部が前記収納ケース内部に固定
された圧電振動板と、を有する圧電発音体を、電話器に
おける送受話器本体の取付基材の音通孔を有する搭載面
に搭載した構造の圧電発音体の取付構造において、前記
収納ケースの内壁面の略中央部に前記圧電振動板の周辺
部が固定されるとともに、前記収納ケースの開口全面を
閉塞するように該収納ケースの開口縁に周辺部が張着さ
れるとともに自由に振動可能な防水性シートと、前記張
着された防水性シートの周辺部上に沿って装着された非
通気性弾性部材と、を配設したことを特徴とする圧電発
音体の取付構造を提供することにより、上記目的を達成
するものである。According to the present invention, there is provided a storage case having one side entirely open and having a braking hole in a wall portion facing the opening, a piezoelectric element fixed to a surface of a diaphragm and And a piezoelectric vibrating body having a piezoelectric vibrating plate whose peripheral portion is fixed inside the storage case. In the body mounting structure, a peripheral portion of the piezoelectric vibrating plate is fixed to a substantially central portion of an inner wall surface of the storage case, and a peripheral portion is formed at an opening edge of the storage case so as to close an entire opening of the storage case. A waterproof sheet capable of freely vibrating while being attached, and a non-breathable elastic member attached along a peripheral portion of the attached waterproof sheet. The mounting structure of the piezoelectric sounding body By subjecting, it is to achieve the above object.
【００２７】[0027]
【作用】本発明においては、圧電振動板が内部に収納さ
れた収納ケースの開口全面を閉塞するように該収納ケー
スの開口縁に防水性シートの周辺部が張着され、且つ該
防水性シートは非通気性弾性部材（ゴムリング等）を介
して送受話器本体における取付基材の搭載面に配設され
る構造なので、収納ケース内部は該防水性シートと非通
気性弾性部材とによって気密化が保持され、取付基材の
搭載面に開口された音通孔から外部環境の水滴や湿気が
収納ケース内部へ侵入することが防止される。したがっ
て、収納ケース内の圧電素子等は水や湿気による信頼性
の低下から保護される。According to the present invention, the periphery of the waterproof sheet is attached to the opening edge of the storage case so as to close the entire opening of the storage case in which the piezoelectric diaphragm is stored, and the waterproof sheet is closed. Is a structure that is provided on the mounting surface of the mounting base of the handset via a non-breathable elastic member (rubber ring or the like), so that the inside of the storage case is airtight by the waterproof sheet and the non-breathable elastic member. Is prevented, and water droplets and moisture of the external environment are prevented from entering the inside of the storage case from the sound through hole opened in the mounting surface of the mounting base material. Therefore, the piezoelectric elements and the like in the storage case are protected from a decrease in reliability due to water or moisture.
【００２８】また、収納ケースの内壁面の略中央部に前
記圧電振動板の周辺部が固定されるとともに、前記収納
ケースの開口全面を閉塞するように該収納ケースの開口
縁に防水性シートの周辺部が張着されるので、該防水性
シートと圧電振動板との間に間隙が保持され、且つ、前
記防水性シートの周辺部上に沿って非通気性弾性部材が
装着され、送受話器本体における取付基材の搭載面と防
水性シートは接触せず、非通気性弾性部材（ゴムリング
等）の断面の厚さ分の間隙が保持されるので、防水性シ
ートは該間隙内で自由に振動することが可能である。し
たがって、受話部の圧電振動板の振動による音圧を大き
く劣化させることなく音通孔を通して伝えることにな
り、また逆に送話部の話し手の声の音圧を大きく劣化さ
せることなく音通孔を通して圧電振動板に伝えることが
できる。A peripheral portion of the piezoelectric vibrating plate is fixed to a substantially central portion of an inner wall surface of the storage case, and a waterproof sheet is provided on an opening edge of the storage case so as to close an entire opening of the storage case. Since the peripheral portion is attached, a gap is maintained between the waterproof sheet and the piezoelectric vibrating plate, and a non-breathable elastic member is attached along the peripheral portion of the waterproof sheet. The mounting surface of the mounting base material in the main body does not contact the waterproof sheet, and a gap corresponding to the thickness of the cross section of the non-breathable elastic member (such as a rubber ring) is maintained, so that the waterproof sheet is free within the gap. It is possible to vibrate. Therefore, the sound pressure due to the vibration of the piezoelectric diaphragm of the receiving section is transmitted through the sound through hole without greatly deteriorating the sound pressure, and conversely, the sound pressure of the speaker's voice in the transmitting section is not significantly degraded. Through to the piezoelectric diaphragm.
【００２９】[0029]
【実施例】本発明の実施例を、図面に基いて詳細に説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings.
【００３０】図１は本発明に係わる圧電発音体の取付構
造の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of a structure for mounting a piezoelectric sounding body according to the present invention.
【００３１】図１において、圧電発音体９０は、一方が
全面開口されるとともに該開口５２に相対する壁部５９
に制動孔５３を有する収納ケース５１と、振動板６２の
表面６２ａに圧電素子６１が固着されるとともに該振動
板の周辺部６２ａが前記収納ケース５１内部における取
付段部５４に固定された圧電振動板６０と、前記収納ケ
ース５１の開口５２全面を閉塞するように開口縁５５に
周辺部が張着されるとともに音圧によって振動可能な防
水性シート７２と、前記防水性シート周辺部に沿って貼
着した非通気性弾性部材９１と、を有し、上記開口縁５
５が、コードレス電話器または携帯電話器の送受話器本
体８０における取付基材８１の搭載面８４の嵌装用凸部
８３に嵌装されるとともに、接着固定されることによ
り、該圧電発音体９０が取付基材８１に搭載された取付
構造となっている。In FIG. 1, one side of a piezoelectric sounding body 90 has an opening, and a wall 59 facing the opening 52.
A piezoelectric element 61 is fixed to a surface 62a of a vibration plate 62, and a peripheral portion 62a of the vibration plate is fixed to a mounting step 54 in the storage case 51. A plate 60, a waterproof sheet 72 whose periphery is attached to the opening edge 55 so as to close the entire surface of the opening 52 of the storage case 51, and which can vibrate by sound pressure, and along the periphery of the waterproof sheet. A non-breathable elastic member 91 attached thereto, and
5 is fitted into the fitting convex portion 83 of the mounting surface 84 of the mounting base material 81 in the handset main body 80 of the cordless telephone or the portable telephone and is fixed by bonding, so that the piezoelectric sounding body 90 is formed. The mounting structure is mounted on the mounting base 81.
【００３２】この際、上記非通気性弾性部材９１は開口
縁５５に張着された防水性シート７２上に装着されてい
るが、脱着自在として圧電発音体９０が取付基材８１に
搭載する際に装着されてもよく、搭載状態において防水
性シート７２が搭載面８４から非通気性弾性部材９１の
断面の厚さ分の間隙が保持されればよい。At this time, the non-breathable elastic member 91 is mounted on the waterproof sheet 72 adhered to the opening edge 55. When the piezoelectric sounding body 90 is mounted on the mounting base 81 so as to be detachable. In the mounted state, the waterproof sheet 72 only needs to maintain a gap corresponding to the thickness of the cross section of the non-breathable elastic member 91 from the mounting surface 84.
【００３３】次に、本発明に係わる圧電発音体９０に使
用される各部材について詳述する。Next, each member used in the piezoelectric sounding body 90 according to the present invention will be described in detail.
【００３４】強誘電体等に圧力または張力等を印加する
と分極が発生して端面に静電荷を生じる圧電効果或いは
電界を印加すると機械的応力を生じる電歪効果を有する
圧電素子６１は、ＰＺＴ（チタン酸ジルコン酸鉛）磁器
等の強誘電体セラミックスを材質として厚さ５０μｍ〜
１００μｍ程度の薄円板状に形成されている。A piezoelectric element 61 having a piezoelectric effect in which a polarization is generated when a pressure or a tension or the like is applied to a ferroelectric or the like to generate an electrostatic charge on an end face or an electrostrictive effect in which a mechanical stress is generated when an electric field is applied is a PZT ( Made from ferroelectric ceramics such as lead zirconate titanate porcelain
It is formed in a thin disk shape of about 100 μm.
【００３５】該圧電素子６１の両端面には、例えば銀等
の電気伝導性の良好なる金属が薄膜状に被着されて電極
が形成されている。On both end surfaces of the piezoelectric element 61, a metal having good electric conductivity such as silver is applied in a thin film form to form electrodes.
【００３６】前記電極が形成された圧電素子６１は、真
鍮等を材質として該圧電素子６１よりも大形であって薄
円板状に形成された振動板６２の振動板表面６２ａに、
一方の電極を介在して固着されることにより圧電振動板
６０が構成されている。The piezoelectric element 61 on which the electrodes are formed is formed on a diaphragm surface 62a of a diaphragm 62 which is made of brass or the like and is larger than the piezoelectric element 61 and formed in a thin disk shape.
The piezoelectric vibrating plate 60 is formed by being fixed with one electrode interposed therebetween.
【００３７】前記振動板６２は、該圧電素子６１の搭載
基材となるとともに圧電振動を媒介するために設けられ
ている。The vibration plate 62 serves as a mounting base for the piezoelectric element 61 and is provided for mediating piezoelectric vibration.
【００３８】また、図示しないが、前記圧電振動板６０
における圧電素子６１に被着された他方の電極の一端部
及び前記振動板６２の一端部には、外部との電気的信号
の授受を行うための絶縁被覆導線が半田固定されるとと
もに、該圧電振動板６０のハウジング基体となる収納ケ
ース５１より導出されているものとする。Although not shown, the piezoelectric diaphragm 60
At one end of the other electrode attached to the piezoelectric element 61 and one end of the vibration plate 62, an insulated conductor for transmitting and receiving an electric signal to / from the outside is fixed by soldering. It is assumed that the vibration plate 60 is led out from a storage case 51 serving as a housing base.
【００３９】該収納ケース５１は、合成樹脂等を材質と
して、環状または多角状を有する側壁と、一方が全面開
口された収納用開口５２と、該収納用開口５２に相対し
た開口相対壁部５９と、を有することにより断面が略凹
形状に成形されている。The storage case 51 is made of synthetic resin or the like, and has a ring-shaped or polygonal side wall, a storage opening 52 whose one end is entirely open, and an opening relative wall portion 59 facing the storage opening 52. , Whereby the cross section is formed into a substantially concave shape.
【００４０】前記開口相対壁部５９の略中心部には、制
動孔５３が開口されており、該制動孔５３を収納ケース
５１の内側において、メッシュ状に構成された音圧調整
膜５８が被覆され、さらに固定用接着材５７により固着
されることにより、前記圧電振動板６０の圧電振動に対
する音圧を調整するように構成されている。A braking hole 53 is opened at a substantially central portion of the opening relative wall portion 59. The braking hole 53 is covered with a sound pressure adjusting film 58 formed in a mesh shape inside the storage case 51. The sound pressure with respect to the piezoelectric vibration of the piezoelectric vibration plate 60 is adjusted by being fixed by the fixing adhesive 57.
【００４１】前記収納ケース５１の内壁面の略中央部に
は、該内面全周に亙って取付段部５４が形成されてお
り、前記圧電振動板６０が、本例においては圧電素子６
１を開口相対壁部５９側に対向させるように、前記収納
用開口５２を介して収納ケース５１の内部に収納される
とともに、該取付段部５４において該圧電振動板６０の
振動板周辺部６２ｂが当接され、さらに、例えばシリコ
ーン系のシール用接着材５６により固定されている。At substantially the center of the inner wall surface of the storage case 51, a mounting step 54 is formed over the entire circumference of the inner surface, and the piezoelectric diaphragm 60 is a piezoelectric element 6 in this embodiment.
1 is housed in the housing case 51 through the housing opening 52 so as to face the opening relative wall portion 59 side, and the diaphragm peripheral portion 62 b of the piezoelectric vibration plate 60 in the mounting step 54. , And is fixed by, for example, a silicone-based sealing adhesive 56.
【００４２】この際、前記シール用接着材５６により、
前記圧電振動板６０の振動板周辺部６２ｂが、前記収納
ケース５１の取付段部５４の全周に亙って塗着され、前
記収納用開口５２が取付段部５４において閉塞されてい
る。At this time, the sealing adhesive 56
A vibrating plate peripheral portion 62 b of the piezoelectric vibrating plate 60 is applied over the entire circumference of the mounting step 54 of the storage case 51, and the storage opening 52 is closed at the mounting step 54.
【００４３】また、前記収納ケース５１の収納用開口５
２側における端部面は開口縁５５となっており、該開口
縁５５には、或程度の通気性を有するとともに、水滴ま
たは湿気等を防滴する撥水性を有する材質で構成された
防水性シート７２が、前記収納用開口５２を閉塞するよ
うに、例えば接着材等により周辺部６９が固着されるこ
とにより張設されている。The storage opening 5 of the storage case 51 is provided.
The end surface on the second side is an opening edge 55. The opening edge 55 has a certain degree of air permeability and is made of a water-repellent material made of a water-repellent material that prevents water droplets or moisture. The sheet 72 is stretched by closing the peripheral portion 69 with, for example, an adhesive or the like so as to close the storage opening 52.
【００４４】さらに、上記張設された防水性シート７２
の開口縁に当接する周辺部上には気体または液体等の透
過を阻止する非通気性を有するとともに、緩衝等の作用
を奏する弾性を有する非通気性弾性部材９１である例え
ばゴムリングが、接着材等により固着されるか、もしく
は脱着自在な状態で装着されている。Furthermore, the stretched waterproof sheet 72
For example, a rubber ring, which is a non-breathable elastic member 91 having a non-breathable property for preventing gas or liquid or the like from permeating and having a function of buffering, is adhered on a peripheral portion abutting an opening edge of It is fixed by a material or the like, or is attached in a detachable state.
【００４５】次に、上記のようにして構成された圧電発
音体５０を、前記コードレス電話器または携帯電話器に
おける送受話器本体８０に取り付けた状態（取付構造）
を説明する。Next, the piezoelectric sounding body 50 constructed as described above is attached to the handset body 80 of the cordless telephone or the portable telephone (attachment structure).
Will be described.
【００４６】図１において、該送受話器本体８０は、本
発明の主要部となる送話口部または受話口部を示してお
り、該部は前記圧電発音体５０が取付られる取付基材８
１になっている。In FIG. 1, the handset main body 80 shows a mouthpiece or earpiece which is a main part of the present invention, and this part is the mounting base 8 on which the piezoelectric sounding body 50 is mounted.
It is 1.
【００４７】該取付基材８１には、送話音または受話音
等を通過させるための音通孔８２，８２´…が開口され
ている。The mounting base 81 is provided with sound holes 82, 82 '... For transmitting a transmission sound or a reception sound.
【００４８】また、前記送受話器本体８０における取付
基材８１の搭載面８４には、前記圧伝発音体９０の収納
用開口５２側における開口縁５５の形状に対応して嵌装
用凸部８３が突設されている。On the mounting surface 84 of the mounting base 81 in the handset main body 80, a fitting projection 83 corresponding to the shape of the opening edge 55 on the storage opening 52 side of the pressure transmission sounding body 90 is provided. It is protruding.
【００４９】この状態において、前記圧電発音体９０の
収納ケース５１の開口縁５５が、該搭載面８４における
嵌装用凸部８３に嵌装されるとともに、図示されないネ
ジまたは接着剤等により圧着固定されることにより、該
圧電発音体９０が取付基材８１に搭載されている。In this state, the opening edge 55 of the storage case 51 of the piezoelectric sounding body 90 is fitted to the fitting projection 83 on the mounting surface 84, and is fixed by crimping with a screw or an adhesive (not shown). Thus, the piezoelectric sounding body 90 is mounted on the mounting base 81.
【００５０】この際、前記開口縁５５に沿って張設され
た防水性シート７２が開口全面を閉塞し、さらに開口縁
に当接する周辺部を非通気性弾性体部材であるゴムリン
グ２６を介して搭載面３４に圧着された構造なので、音
通孔３２、３２´…を通しての外部からの水滴または湿
気の侵入を防止する構造となっている。At this time, the waterproof sheet 72 stretched along the opening edge 55 closes the entire opening, and the peripheral portion that comes into contact with the opening edge is interposed through the rubber ring 26 as a non-breathable elastic member. , So that water or moisture is prevented from entering from outside through the sound holes 32, 32 ′.
【００５１】また、上記防水性シート７２は圧電振動板
６０との間に間隙が保持され、且つ送受話器本体８０に
おける取付基材８１の搭載面８４とは非通気性弾性部材
（例えばゴムリング）９１の断面の厚さ分の間隙が保持
されるので接触せず、該間隙内で自由に振動することが
可能である。したがって、受話部に取り付けられた当該
圧電発音体９０の圧電振動板６０の振動による音圧を防
水性シート７２は減衰することなく、そのまま防水性シ
ート７２自身の振動によって音通孔８２、８２´…をと
おして伝えることになり、また逆に送話部の話し手の声
の音圧を大きく減衰することなく音通孔８２、８２´…
を通して圧電振動板６０に伝えるので音圧の劣化は少な
い。The waterproof sheet 72 is provided with a gap between itself and the piezoelectric diaphragm 60, and is non-breathable elastic member (for example, a rubber ring) with the mounting surface 84 of the mounting base 81 in the handset main body 80. Since a gap corresponding to the thickness of the cross section of 91 is maintained, it is possible to vibrate freely within the gap without contact. Therefore, the waterproof sheet 72 does not attenuate the sound pressure due to the vibration of the piezoelectric vibration plate 60 of the piezoelectric sounding body 90 attached to the earpiece, and the sound through holes 82 and 82 ′ are generated by the vibration of the waterproof sheet 72 itself. , And vice versa, and conversely, the sound pressure of the speaker's voice in the transmitting section is not greatly attenuated, and the sound through holes 82, 82 ',.
Is transmitted to the piezoelectric vibrating plate 60 so that the sound pressure is hardly degraded.
【００５２】なお、上記防水性シート７２を用いた防水
性対策に伴う音圧劣化が少ないように構成されるために
は、防水性シート７２が自由に振動できるに十分な程度
に非通気性弾性部材（例えばゴムリング）９１の断面の
厚さを設定することが望ましい。In order to reduce the sound pressure deterioration due to the waterproofing measure using the waterproofing sheet 72, the waterproof sheet 72 has a non-breathable elasticity enough to be able to freely vibrate. It is desirable to set the thickness of the cross section of the member (for example, a rubber ring) 91.
【００５３】本発明者の実験によれば、図３の音圧ー周
波数特性に示されるように、同条件において防水性シー
トが搭載面に当着された従来の圧電発音体（Ｂ）に対し
て、自由に振動可能な本発明に係わる圧電発音体（Ａ）
の音圧レベルが使用周波数帯域全体に亙って向上してい
ることが判る。According to the experiment of the present inventor, as shown in the sound pressure-frequency characteristics of FIG. 3, under the same conditions, the conventional piezoelectric sounding body (B) in which the waterproof sheet was attached to the mounting surface under the same conditions. Piezoelectric vibrating body (A) according to the present invention, which can vibrate freely
It can be seen that the sound pressure level has increased over the entire use frequency band.
【００５４】[0054]
【発明の効果】本発明に係わる圧電発音体の取付構造
は、上記のように構成されているため、取付基材の搭載
面に嵌設された音通孔から外部環境の水滴や湿気が収納
ケース内部へ侵入することが防水性シートと非通気性弾
性体部材にて防止され、収納ケース内の圧電素子等を水
や湿気による信頼性の低下から保護することができると
ともに、上記防水性シートが自由に振動可能なので上記
防水対策によって音圧を劣化させることが少ないという
優れた効果を有する。As described above, the mounting structure of the piezoelectric sounding body according to the present invention is configured as described above, so that water droplets and moisture of the external environment are stored from the sound through holes fitted on the mounting surface of the mounting base material. Intrusion into the case is prevented by the waterproof sheet and the non-breathable elastic member, and the piezoelectric element and the like in the storage case can be protected from a decrease in reliability due to water or moisture, and the waterproof sheet can be protected. Has an excellent effect that the sound pressure is hardly degraded by the waterproofing measures, since it can vibrate freely.
【図１】 本発明に係わる圧電発音体の取付構造の実施
例を示す断面図FIG. 1 is a sectional view showing an embodiment of a mounting structure of a piezoelectric sounding body according to the present invention.
【図２】 従来の圧電発音体の取付構造を示す断面図FIG. 2 is a cross-sectional view showing a conventional piezoelectric sounding body mounting structure.
【図３】 従来および本発明に係わる圧電発音体の音圧
ー周波数特性図FIG. 3 is a diagram showing sound pressure-frequency characteristics of a piezoelectric sounding body according to the related art and the present invention.
１０ 圧電発音体 ５１ 収納ケース ５２ 収納用開口 ５３ 制動孔 ５４ 取付段部 ５５ 開口縁 ５６ シール用接着材 ５８ 音圧調整膜 ５９ 開口相対壁部 ６０ 圧電振動板 ６１ 圧電素子 ６２ 振動板 ６２ａ 振動板表面 ６２ｂ 振動板周辺部 ６９ （防水性シート）周辺部 ９１ 非通気性弾性部材 ７２ 防水性シート ８０ 送受話器本体 ８１ 取付基材 ８２、８２´…音通孔 ８３ 嵌装用凸部 ８４ 搭載面 ９０ 圧電発音体 DESCRIPTION OF SYMBOLS 10 Piezoelectric sound generator 51 Storage case 52 Storage opening 53 Braking hole 54 Mounting step 55 Opening edge 56 Sealing adhesive 58 Sound pressure adjustment film 59 Opening relative wall 60 Piezoelectric diaphragm 61 Piezoelectric element 62 Diaphragm 62a Diaphragm surface 62b Peripheral part of diaphragm 69 (Waterproof sheet) Peripheral part 91 Non-breathable elastic member 72 Waterproof sheet 80 Handset main body 81 Mounting base material 82, 82 '... Sound through hole 83 Fitting projection 84 Mounting surface 90 Piezoelectric sound body
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭63−81438（ＪＰ，Ｕ) 実開 平２−103997（ＪＰ，Ｕ) 実開 昭60−114492（ＪＰ，Ｕ) 実開 昭58−66798（ＪＰ，Ｕ) 実開 昭62−146350（ＪＰ，Ｕ) 実開 平４−15341（ＪＰ，Ｕ) 実開 平２−32261（ＪＰ，Ｕ) 実開 平４−112544（ＪＰ，Ｕ) 実開 昭57−115798（ＪＰ，Ｕ) 実開 昭63−81436（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 63-81438 (JP, U) Japanese Utility Model 2-103997 (JP, U) Japanese Utility Model 60-114492 (JP, U) Japanese Utility Model 1983 66798 (JP, U) Japanese Utility Model 62-146350 (JP, U) Japanese Utility Model 4-15341 (JP, U) Japanese Utility Model 2-32261 (JP, U) Japanese Utility Model 4-112544 (JP, U) Japanese Utility Model Showa 57-115798 (JP, U) Japanese Utility Model Showa 63-81436 (JP, U)
Claims (1)
相対する壁部に制動孔を有する収納ケースと、 振動板の表面に圧電素子が固着されるとともに該振動板
の周辺部が前記収納ケース内部に固定された圧電振動板
と、 を有する圧電発音体を、 電話器における送受話器本体の取付基材の音通孔を有す
る搭載面に搭載した構造の圧電発音体の取付構造におい
て、 前記収納ケースの内壁面の略中央部に前記圧電振動板の
周辺部が固定されるとともに、 前記収納ケースの開口全面を閉塞するように該収納ケー
スの開口縁に周辺部が張着されるとともに自由に振動可
能な防水性シートと、 前記張着された防水性シートの周辺部上に沿って装着さ
れた非通気性弾性部材と、 を配設したことを特徴とする圧電発音体の取付構造。1. A storage case having one side entirely open and having a braking hole in a wall portion facing the opening, a piezoelectric element fixed to a surface of a diaphragm, and a peripheral portion of the diaphragm being the storage case. A piezoelectric vibrating plate fixed inside, and a piezoelectric sounding body having a structure in which a piezoelectric sounding body having the following structure is mounted on a mounting surface having a sound through hole of a mounting base of a handset main body in a telephone. A peripheral portion of the piezoelectric vibrating plate is fixed to a substantially central portion of an inner wall surface of the case, and a peripheral portion is adhered to an opening edge of the storage case so as to close the entire opening of the storage case and freely. A mounting structure for a piezoelectric sounding body, comprising: a waterproof sheet that can be vibrated; and a non-breathable elastic member that is mounted along a peripheral portion of the attached waterproof sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4244565A JP2721774B2 (en) | 1992-09-14 | 1992-09-14 | Mounting structure of piezoelectric sounding body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4244565A JP2721774B2 (en) | 1992-09-14 | 1992-09-14 | Mounting structure of piezoelectric sounding body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0698397A JPH0698397A (en) | 1994-04-08 |
| JP2721774B2 true JP2721774B2 (en) | 1998-03-04 |
Family
ID=17120612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4244565A Expired - Lifetime JP2721774B2 (en) | 1992-09-14 | 1992-09-14 | Mounting structure of piezoelectric sounding body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2721774B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3595873B2 (en) * | 2000-02-18 | 2004-12-02 | 松下電工株式会社 | Simple installation type security sensor |
| JP2002345088A (en) * | 2001-05-18 | 2002-11-29 | Mitsubishi Electric Corp | Pressure sensing device and manufacturing method for semiconductor substrate used for it |
| JP2008182474A (en) * | 2007-01-24 | 2008-08-07 | Olympus Imaging Corp | Electronic equipment and imaging apparatus |
| JP5059633B2 (en) * | 2008-01-16 | 2012-10-24 | 理研計器株式会社 | Explosion-proof gas alarm |
| EP2661102A4 (en) * | 2010-12-28 | 2017-11-01 | NEC Corporation | Vibration device and electronic apparatus |
| JP5778461B2 (en) * | 2011-04-18 | 2015-09-16 | 理研計器株式会社 | Portable gas alarm |
| KR101354817B1 (en) * | 2012-08-30 | 2014-01-23 | 한국오므론전장주식회사 | Speaker structure which is easy to intercept dust |
| JP7425965B2 (en) * | 2020-03-11 | 2024-02-01 | Tdk株式会社 | Acoustic devices and sound production devices |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5786399A (en) * | 1980-11-20 | 1982-05-29 | Hitachi Ltd | Clothing drier |
| JPS592187A (en) * | 1982-06-29 | 1984-01-07 | Fujitsu Ltd | Object recognizing device |
| JPS60114492U (en) * | 1984-01-11 | 1985-08-02 | ティーディーケイ株式会社 | acoustic transducer |
| JPS61175048A (en) * | 1985-01-31 | 1986-08-06 | Toshiba Corp | Printing control system |
| JPS6381438U (en) * | 1986-11-14 | 1988-05-28 | ||
| JPH02103997U (en) * | 1989-02-04 | 1990-08-17 |
-
1992
- 1992-09-14 JP JP4244565A patent/JP2721774B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0698397A (en) | 1994-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19971111 |