JPH07222284A - Horn-shaped piezoelectric ceramic speaker - Google Patents
Horn-shaped piezoelectric ceramic speakerInfo
- Publication number
- JPH07222284A JPH07222284A JP6011078A JP1107894A JPH07222284A JP H07222284 A JPH07222284 A JP H07222284A JP 6011078 A JP6011078 A JP 6011078A JP 1107894 A JP1107894 A JP 1107894A JP H07222284 A JPH07222284 A JP H07222284A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric ceramic
- diaphragm
- speaker
- horn
- sound
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 32
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
- 229920000642 polymer Polymers 0.000 claims abstract description 8
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 2
- 230000005389 magnetism Effects 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum alloy Chemical class 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明のホーン型圧電セラミッ
クスピーカは、各種の産業機器、民生機器に組込んで発
音させるスピーカとして利用できる。INDUSTRIAL APPLICABILITY The horn type piezoelectric ceramic speaker of the present invention can be used as a speaker which is incorporated in various industrial equipment and consumer equipment to produce a sound.
【０００２】[0002]
【従来の技術】分極し両面に薄い電極を添着した圧電セ
ラミック板を振動板に接着して発音体とし、これに交番
電圧を加えて振動させ発音させる音響装置は、ブザー、
リンガー、電話器用レシーバ、インターホン等として、
各種の産業機器、民生機器に広く実用されている。2. Description of the Related Art A piezoelectric ceramic plate, which is polarized and has thin electrodes attached on both sides, is bonded to a vibrating plate as a sounding body, and an acoustic device for vibrating by vibrating by applying an alternating voltage is a buzzer,
As a ringer, telephone receiver, intercom, etc.,
Widely used in various industrial and consumer equipment.
【０００３】このような圧電セラミックを発音体とした
従来の圧電セラミックスピーカは、周波数帯域が狭く、
又は音圧が低いため、音声を拡大して伝達するのに不適
当であった。そのため従来は、ほとんどの場合ダイナミ
ック型スピーカが使用されていた。又、音量の小さい発
音体の発生する音波を、断面積が次第に大きくなるホー
ンを通して音量を増すことも行なわれている。A conventional piezoelectric ceramic speaker using such a piezoelectric ceramic as a sounding body has a narrow frequency band,
Or, the sound pressure was low, which was not suitable for expanding and transmitting voice. Therefore, conventionally, the dynamic type speaker has been used in most cases. Further, it is also practiced to increase the sound volume of a sound wave generated by a low-volume sounding body through a horn whose cross-sectional area gradually increases.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ダイナ
ミック型スピーカは、永久磁石を持っているため、重く
なるだけでなく、周囲に磁力を漏洩して、例えばテレビ
ジョンの画面を乱したり、スピーカの近くに設けたプリ
ント基板にリード線を半田付けするときに、半田ごての
鉄部分が磁石に引付けられるので細かい半田付け作業が
やり難くなる等の障害が出る。However, since the dynamic type speaker has a permanent magnet, it not only becomes heavy, but also leaks magnetic force to the surroundings, for example, disturbs the screen of a television or the speaker. When a lead wire is soldered to a printed circuit board provided nearby, the iron portion of the soldering iron is attracted to the magnet, which causes obstacles such as making fine soldering work difficult.
【０００５】又、ダイナミック型スピーカは、製作コス
トの点でも高価になり、コストを下げるために種々対策
が構じられているけれども、現在の所、コスト低減は限
界に近い状態である。Further, the dynamic type speaker is also expensive in terms of manufacturing cost, and various measures are taken to reduce the cost, but at present, the cost reduction is almost at its limit.
【０００６】[0006]
【課題を解決する為の手段】この発明は、次の手段によ
りホーン型圧電セラミックスピーカを構成するものであ
る。According to the present invention, a horn type piezoelectric ceramic speaker is constructed by the following means.
【０００７】(1) 振動板の素材として、無機質繊維で補
強した高分子化合物の薄板を使用し、この振動板に、分
極したセラミック板である圧電セラミックを接着して振
動板を駆動する。(1) As a material for the diaphragm, a thin film of a polymer compound reinforced with inorganic fibers is used, and a piezoelectric ceramic, which is a polarized ceramic plate, is bonded to the diaphragm to drive the diaphragm.
【０００８】(2) 上記の振動板に、ホーンを接続する。
ホーンは、立壁を隔てて隣接し、小面積内に長い導音路
を形成する渦巻形、ジグザグ形等の屈曲導音路を形成し
たものである。(2) A horn is connected to the above diaphragm.
The horn is formed by forming a curved sound guiding path such as a spiral shape or a zigzag shape, which is adjacent to each other across a standing wall and forms a long sound guiding path in a small area.
【０００９】[0009]
【作用】無機質繊維で補強した高分子化合物の振動板
は、コンプライアンスが大きく軽いから、共振周波数が
下がると共に能率が向上するが、更に広域の周波数特性
を改善する効果もある。Since the diaphragm made of a polymer compound reinforced with an inorganic fiber has a large compliance and is light, the resonance frequency is lowered and the efficiency is improved, but it also has an effect of improving the frequency characteristic in a wider range.
【００１０】上記の圧電セラミックを接着した振動板の
振動を屈曲導音路を形成したホーンに接続することによ
り、音量増大及び十分な広帯域化ができる。ホーンの形
状は渦巻形、ジグザグ形等の屈曲形として導音路を長く
するから、小型のケーシング内に形成してスピーカを小
型化できる。又、蓋板の振動板取付部を外れた部分をプ
リント基板として利用し、電圧増幅器を設けることがで
きる。このスピーカは、電気インピーダンスが高いか
ら、電力増幅器を必要としない。By connecting the vibration of the vibration plate to which the above-mentioned piezoelectric ceramic is adhered to the horn having the curved sound guide path, the volume can be increased and the band can be sufficiently widened. The shape of the horn is a bent shape such as a spiral shape or a zigzag shape to lengthen the sound guide path, so that the speaker can be miniaturized by forming it in a small casing. Further, the voltage amplifier can be provided by using the portion of the lid plate that is not attached to the vibration plate mounting portion as a printed circuit board. This speaker does not require a power amplifier because of its high electrical impedance.
【００１１】[0011]
【実施例】図１〜７は、本発明のホーン型圧電セラミッ
クスピーカの第１実施例を示し、図１は平面図、図２は
側面図、図３は図１のＡ−Ａ断面図、図４は蓋板を除い
たケーシングの平面図、図５はこれの斜視図、図６は蓋
板の平面図、図７は図６のＢ−Ｂ断面図、図８はこのス
ピーカの周波数特性図、図９はケーシングを外した振動
板のみの周波数特性図である。1 to 7 show a first embodiment of a horn type piezoelectric ceramic speaker of the present invention, FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a sectional view taken along line AA of FIG. 4 is a plan view of the casing without the cover plate, FIG. 5 is a perspective view of the same, FIG. 6 is a plan view of the cover plate, FIG. 7 is a sectional view taken along the line BB of FIG. 6, and FIG. 8 is a frequency characteristic of the speaker. FIG. 9 is a frequency characteristic diagram of only the diaphragm with the casing removed.
【００１２】このホーン型圧電セラミックスピーカ１
は、ケーシング２に蓋板３を接着し、蓋板３に振動板４
の周縁部を接着し、振動板４に圧電セラミック５を接着
したものである。This horn type piezoelectric ceramic speaker 1
Attaches the lid plate 3 to the casing 2, and attaches the diaphragm 4 to the lid plate 3.
The peripheral portion of the is bonded and the piezoelectric ceramic 5 is bonded to the vibration plate 4.
【００１３】更に詳しく説明すると、ケーシング２は、
図４、図５のように、蓋板３に穿設される音孔６（後
述）の位置６ａを中心として次第に広がり且つ断面積を
次第に大きくする渦巻形に立壁７を形成し、この立壁７
により渦巻形の導音溝８を形成する。導音溝８の最も広
がった末端８ａは、ケーシング外に開口する。この実施
例においては、ケーシングの素材としてＡＢＳ樹脂を使
用したが、これに限らず、塩化ビニルその他の加熱成形
可能な合成樹脂やアルミニウム合金、真鍮、ステンレス
鋼等のプレス成形可能な金属を使用することができる。More specifically, the casing 2 is
As shown in FIGS. 4 and 5, the standing wall 7 is formed in a spiral shape that gradually expands around a position 6a of a sound hole 6 (described later) formed in the cover plate 3 and gradually increases the cross-sectional area.
Thus, the spiral sound guide groove 8 is formed. The widest end 8a of the sound guide groove 8 opens outside the casing. In this embodiment, the ABS resin is used as the material of the casing, but the material is not limited to this, and vinyl chloride and other heat-moldable synthetic resins and press-moldable metals such as aluminum alloy, brass, and stainless steel are used. be able to.
【００１４】蓋板３は、図６、図７のように、ケーシン
グの立壁７の渦巻形の中心部の上に凹部９を形成し、そ
の下部に振動板４の周縁部を接着する段部１０を形成す
る。凹部９の中心部には音孔６を穿設してケーシングの
渦巻形の中心部に通じさせる。蓋板３の素材もケーシン
グ２と同様である。As shown in FIGS. 6 and 7, the cover plate 3 has a stepped portion in which a concave portion 9 is formed on the center portion of the spiral shape of the standing wall 7 of the casing, and the peripheral portion of the diaphragm 4 is bonded to the lower portion thereof. Form 10. A sound hole 6 is formed in the center of the recess 9 so as to communicate with the spiral center of the casing. The material of the cover plate 3 is the same as that of the casing 2.
【００１５】振動板４は、無機質繊維で補強された高分
子化合物としてガラス繊維入りのエポキシ樹脂の薄板を
使用した。その他にもガラス繊維やカーボン繊維を入れ
たＡＢＳ、エポキシ、ポリエステル等の高分子化合物の
薄板が利用できる。The vibrating plate 4 is a thin plate of epoxy resin containing glass fibers as a polymer compound reinforced with inorganic fibers. In addition, thin plates of polymer compounds such as ABS, epoxy, polyester, etc. containing glass fibers or carbon fibers can be used.
【００１６】振動板４の中央には、セラミック薄板を分
極し、両面に薄電極（図示せず）を添着した圧電セラミ
ック５を接着する。At the center of the vibrating plate 4, a ceramic thin plate is polarized, and piezoelectric ceramics 5 having thin electrodes (not shown) attached on both sides are bonded.
【００１７】以上にように構成するから、圧電セラミッ
ク５の両面に添着した電極に信号電圧を加えると、圧電
セラミック５が信号に応じて変形し、これに伴って振動
板４が振動する。これによって発生する空気の疎密波
（音波）が音孔６を通って導音溝８に入り、渦巻形の導
音溝を進行して末端８ａから大気中に出る。これによっ
て振動板４の発生する音波の音量を拡大して聞くことが
できる。With the above structure, when a signal voltage is applied to the electrodes attached to both surfaces of the piezoelectric ceramic 5, the piezoelectric ceramic 5 is deformed according to the signal, and the diaphragm 4 vibrates accordingly. The compression wave (sound wave) of the air generated thereby enters the sound guide groove 8 through the sound hole 6, travels in the spiral sound guide groove, and exits from the end 8a into the atmosphere. As a result, the volume of the sound wave generated by the diaphragm 4 can be enlarged and heard.
【００１８】このように振動板の発生する音波を次第に
拡張される通路を通して音圧を高めることは、従来も発
音体にホーンを結合することにより行なわれていたが、
この実施例は、圧電セラミックの発音体と、立壁を隔て
て隣接する渦巻形の導音溝を持つケーシング２、蓋板３
とにより大きさの割合に長い導音路を持つホーンを形成
して音圧を高めると共に周波数特性を改善することがで
きたものである。このスピーカの大きさは、図１の縦方
向の長さ９４mm、同じく幅７２mm、厚さ２０mmで、図８
の周波数特性を持っており、５００〜２０００Hzの範囲
で高い音圧を示している。この特性図は、入力電圧２４
ＶP-P 、測定用マイクロホンとの距離を１０cmとして測
定したものである。このホーン型圧電セラミックスピー
カは、圧電セラミックを添着した振動板と渦巻形ホーン
を結合することにより、小型で広帯域、特に低音域に延
びた特性を持つスピーカを得たものである。蓋板３をケ
ーシングから取外したときの圧電セラミック５、振動板
４のみの周波数特性は、図９のように約１２００Hz付近
でピークを持つものであるから、この実施例のスピーカ
はケーシング２との結合により低音域の利得が多くな
り、音声を自然に近い状態で聞くことができるようにし
たことが判る。In this way, increasing the sound pressure through the passage in which the sound wave generated by the diaphragm is gradually expanded has been conventionally performed by connecting the horn to the sounding body.
In this embodiment, a piezoelectric ceramic sounding body, a casing 2 and a cover plate 3 each having a spiral sound guide groove adjacent to each other with a standing wall therebetween.
By forming a horn having a long sound guide path in proportion to the size, the sound pressure can be increased and the frequency characteristic can be improved. As for the size of this speaker, the length in the vertical direction of FIG. 1 is 94 mm, the width is 72 mm, and the thickness is 20 mm.
It has a frequency characteristic of, and shows a high sound pressure in the range of 500 to 2000 Hz. This characteristic diagram shows the input voltage 24
It is measured by setting the distance between V PP and the measurement microphone to be 10 cm. This horn-type piezoelectric ceramic speaker is a speaker having a small size, a wide band, and particularly a characteristic extending in a low frequency range, which is obtained by coupling a diaphragm attached with a piezoelectric ceramic and a spiral horn. The frequency characteristic of only the piezoelectric ceramic 5 and the diaphragm 4 when the cover plate 3 is removed from the casing has a peak at around 1200 Hz as shown in FIG. It can be seen that the combination increases the gain in the low frequency range so that the sound can be heard in a state close to natural.
【００１９】なお、圧電セラミックスピーカは、容量性
のインピーダンス特性を持ち、３００〜３０００Hzにお
いて１０ kΩ〜数百Ωになる。これはダイナミック型ス
ピーカの１００倍に近い値であり、従って消費電流も１
／１００近くになりダイナミック型スピーカの駆動には
必要な電力増幅回路を使用しないで駆動可能である。The piezoelectric ceramic speaker has a capacitive impedance characteristic, which is 10 kΩ to several hundreds Ω at 300 to 3000 Hz. This is close to 100 times that of a dynamic speaker, so the current consumption is 1
It becomes close to / 100 and can be driven without using a power amplifier circuit required for driving a dynamic speaker.
【００２０】図１０は本発明の第２実施例を示し、図３
と同様に切断した蓋板の縦断面図である。この実施例
は、蓋板の一部に薄肉部４ａを形成してこれを振動板と
するものである。蓋板３ａはガラス繊維入りのエポキシ
樹脂で成形されて、その振動板取付け部位を０．２mmに
薄く形成している。蓋板の素材としては実施例１の振動
板と同様にガラス繊維、カーボン繊維入りのポリエステ
ル、ＡＢＳ、エポキシ等の高分子化合物が利用できる。
これらの樹脂は、蓋板等の成形時に、その一部に厚さ
０．１mmまでの薄肉部を形成することが可能である。こ
の薄肉部４ａに圧電セラミック５を接着し、第１実施例
と同じケーシング２に結合する。この場合も蓋板３と立
壁７とを同体に形成し、ケーシング２の底板を別体に造
って後から前者に結合するようにしてもよい。FIG. 10 shows a second embodiment of the present invention, and FIG.
It is a longitudinal cross-sectional view of the lid plate cut in the same manner as. In this embodiment, a thin portion 4a is formed on a part of the lid plate and is used as a diaphragm. The cover plate 3a is molded of epoxy resin containing glass fiber, and its diaphragm mounting portion is thinly formed to 0.2 mm. As the material of the cover plate, a polymer compound such as glass fiber, carbon fiber-containing polyester, ABS, or epoxy can be used as in the diaphragm of the first embodiment.
It is possible to form a thin portion having a thickness of up to 0.1 mm on a part of these resins when molding a lid plate or the like. The piezoelectric ceramic 5 is adhered to the thin portion 4a and is joined to the same casing 2 as in the first embodiment. In this case as well, the lid plate 3 and the standing wall 7 may be formed in the same body, the bottom plate of the casing 2 may be formed as a separate body, and the latter may be joined to the former later.
【００２１】図１１〜図１４は本発明の第３実施例を示
し、図１１はケーシングの平面図、図１２はこれの斜視
図、図１３は蓋板の平面図、図１４は図１３のＣ−Ｃ断
面図である。11 to 14 show a third embodiment of the present invention, FIG. 11 is a plan view of a casing, FIG. 12 is a perspective view of the same, FIG. 13 is a plan view of a cover plate, and FIG. It is CC sectional drawing.
【００２２】第３実施例は、ケーシング２ａの四角形の
底板の周囲に形成した立壁７ａの間に立壁７ｂ、７ｃを
突出させて、導音溝を立壁７ｂ、７ｃを隔てて隣接する
ジグザグ形に形成し、開口した末端８ａで大気に通じさ
せるものである。このケーシング２ａに重ねる蓋板３ａ
に設ける音孔６は、屈曲した導音溝８の始端に位置する
ように円形の凹部９の偏心位置に穿設している。In the third embodiment, the standing walls 7b and 7c are projected between the standing walls 7a formed around the rectangular bottom plate of the casing 2a, and the sound guiding groove is formed in a zigzag shape adjacent to each other with the standing walls 7b and 7c interposed therebetween. It is formed and communicated with the atmosphere at the open end 8a. A lid plate 3a to be placed on this casing 2a
The sound hole 6 provided in the circular groove 9 is formed at the eccentric position of the circular concave portion 9 so as to be located at the start end of the bent sound guiding groove 8.
【００２３】この第３実施例の蓋板３ｂは、別体の振動
板４を接着する構造のものを四角形にしているが、第２
実施例と同様に振動板をケーシングと同体に形成する構
造とすることもできる。In the cover plate 3b of the third embodiment, the structure in which the separate diaphragm 4 is adhered has a rectangular shape.
As in the embodiment, the diaphragm may be formed integrally with the casing.
【００２４】[0024]
(1) 圧電セラミックスピーカと渦巻形、ジグザグ形等の
屈曲形ホーンとを結合して構成するから、対候性、耐環
境性に優れ、温度、雨水のため故障を生じ難く、インタ
ーホンとして屋外に設置して有効である。又磁気漏洩に
よる障害を生じない。(1) Since the piezoelectric ceramic speaker and spiral type, zigzag type, etc. bent type horn are combined, it is excellent in weather resistance and environmental resistance, and it is hard to cause failure due to temperature and rainwater. Installed and effective. In addition, no damage due to magnetic leakage occurs.
【００２５】(2) 電気インピーダンスが高いから、電力
増幅器を必要としないで音量を大にできる。(2) Since the electric impedance is high, the volume can be increased without the need for a power amplifier.
【００２６】(3) 屈曲形の音溝の形状に設計自由度が高
く、小型に製作できるから、各種機器の筐体に組込み易
い。(3) The shape of the bent sound groove has a high degree of freedom in design and can be manufactured in a small size, so that it can be easily incorporated in the housing of various devices.
【００２７】(4) ガラス繊維、カーボン繊維等の無機質
繊維で補強したエポキシ樹脂、ＡＢＳ樹脂等の高分子化
合物を使用し、蓋板と振動板とを同体に形成すれば、製
作を著しく容易にすることができる。(4) By using a polymer compound such as epoxy resin or ABS resin reinforced with an inorganic fiber such as glass fiber or carbon fiber, and forming the lid plate and the vibration plate in the same body, the production is remarkably easy. can do.
【００２８】(5) 蓋板を電圧増幅器等の回路基板として
使用することができる。(5) The cover plate can be used as a circuit board for a voltage amplifier or the like.
【図１】第１実施例の平面図。FIG. 1 is a plan view of the first embodiment.
【図２】同じく側面図。FIG. 2 is a side view of the same.
【図３】図１のＡ−Ａ断面図。3 is a sectional view taken along line AA of FIG.
【図４】蓋板を除いたケーシングの平面図。FIG. 4 is a plan view of the casing without a cover plate.
【図５】同上の斜視図。FIG. 5 is a perspective view of the same.
【図６】蓋板の平面図FIG. 6 is a plan view of a cover plate.
【図７】図６のＢ−Ｂ断面図。7 is a sectional view taken along line BB of FIG.
【図８】第１実施例のスピーカの周波数特性図。FIG. 8 is a frequency characteristic diagram of the speaker of the first embodiment.
【図９】振動板のみの周波数特性図。FIG. 9 is a frequency characteristic diagram of only the diaphragm.
【図１０】第２実施例の蓋板の縦断面図。FIG. 10 is a vertical sectional view of a cover plate according to a second embodiment.
【図１１】第３実施例のケーシングの平面図。FIG. 11 is a plan view of the casing of the third embodiment.
【図１２】同上の斜視図。FIG. 12 is a perspective view of the above.
【図１３】同上の蓋板の平面図。FIG. 13 is a plan view of the lid plate of the above.
【図１４】図１３のＣ−Ｃ断面図。14 is a cross-sectional view taken along line CC of FIG.
１ スピーカ ２、２ａ ケーシング ３、３ａ，３ｂ 蓋板 ４ 振動板 ４ａ 薄肉部 ５ 圧電セラミック ６ 音孔 ６ａ 音孔の位置 ７、７ａ、７ｂ、７ｃ 立壁 ８ 導音溝 ８ａ 末端 ９ 凹部 １０ 段部 DESCRIPTION OF SYMBOLS 1 speaker 2, 2a casing 3, 3a, 3b cover plate 4 diaphragm 4a thin part 5 piezoelectric ceramic 6 sound hole 6a sound hole position 7, 7a, 7b, 7c standing wall 8 sound guide groove 8a end 9 recess 10 step
Claims (3)
より隔てられて隣接し、次第に断面積を大きくすると共
に末端（８ａ）を大気に通じさせる屈曲形導音溝（８）
を形成したケーシング（２）（２ａ）と、凹部（９）を
形成しその周囲部分に、無機質繊維で補強した薄い高分
子化合物の振動板（４）の縁を接着し、両面に薄電極を
添着した圧電セラミック（５）を上記振動板（４）に接
着した蓋板（３）とを結合して成り、上記凹部（９）を
音孔（６）により屈曲形導音溝（８）の始端に通じさせ
たホーン型圧電セラミックスピーカ。1. A bent sound guiding groove (8) which is adjacent to and is separated by standing walls (7), (7a), (7b) and (7c), and which has a gradually increasing cross-sectional area and allows the end (8a) to communicate with the atmosphere.
The casing (2) (2a) formed with the concave portion (9) is formed, and the periphery of the concave portion (9) is adhered to the edge of the thin polymer compound diaphragm (4) reinforced with inorganic fibers, and thin electrodes are attached on both sides. The piezoelectric ceramic (5) attached to the diaphragm (4) is bonded to the cover plate (3) bonded to the diaphragm (4), and the recess (9) is formed by the sound hole (6) to form the curved sound guide groove (8). A horn-type piezoelectric ceramic speaker that communicates with the beginning.
で成形すると共に、これに形成した凹部（９）に振動板
となる薄肉部（４ａ）を同体に形成した請求項１に記載
のホーン型圧電セラミックスピーカ。2. The cover plate (3a) is formed of the same material as the diaphragm (4), and the recessed portion (9) formed in the cover plate (3a) is integrally formed with a thin portion (4a) serving as a diaphragm. The horn-type piezoelectric ceramic speaker described in 1.
蓋板（３）（３ａ）（３ｂ）側に形成した請求項１及び
請求項２に記載したホーン型圧電セラミックスピーカ。3. The horn type piezoelectric ceramic speaker according to claim 1 or 2, wherein the standing walls (7), (7a), (7b) and (7c) are formed on the cover plates (3), (3a) and (3b) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6011078A JPH07222284A (en) | 1994-02-02 | 1994-02-02 | Horn-shaped piezoelectric ceramic speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6011078A JPH07222284A (en) | 1994-02-02 | 1994-02-02 | Horn-shaped piezoelectric ceramic speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07222284A true JPH07222284A (en) | 1995-08-18 |
Family
ID=11767954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6011078A Pending JPH07222284A (en) | 1994-02-02 | 1994-02-02 | Horn-shaped piezoelectric ceramic speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07222284A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020024186A (en) * | 2002-01-31 | 2002-03-29 | 황상문 | Receiving unit for the mobile phone |
| KR20020076503A (en) * | 2001-03-29 | 2002-10-11 | 안정오 | Speaker manufacturing method using fiber and speaker |
| KR100359173B1 (en) * | 1999-10-22 | 2002-10-31 | 시티즌 일렉트로닉스 가부시키가이샤 | Sound producing device for an electronic instrument such as a telephone |
| KR20030021288A (en) * | 2001-09-05 | 2003-03-15 | 혜성산업주식회사 | Receving unit for terminal |
| JP2005348190A (en) * | 2004-06-04 | 2005-12-15 | Elecom Co Ltd | Audio magnifier |
| US7051835B2 (en) * | 2001-02-19 | 2006-05-30 | Genelec Oy | Bass-reflex loudspeaker system and method of manufacturing the same |
| JP2008070481A (en) * | 2006-09-12 | 2008-03-27 | Yazaki Corp | Instrument device and acoustic device |
| JP2015109516A (en) * | 2013-12-03 | 2015-06-11 | フジゲン株式会社 | Stand for portable electronic apparatus |
| CN107331381A (en) * | 2017-05-12 | 2017-11-07 | 南京大学 | A kind of broadband acoustics coupler |
| JP2017207633A (en) * | 2016-05-19 | 2017-11-24 | 衆智達技研株式会社 | Electronic alarming horn |
| WO2019092828A1 (en) * | 2017-11-09 | 2019-05-16 | 株式会社今仙電機製作所 | Electronic horn |
| US11145286B2 (en) | 2017-03-01 | 2021-10-12 | Imasen Electric Industrial Co., Ltd. | Electronic horn |
-
1994
- 1994-02-02 JP JP6011078A patent/JPH07222284A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100359173B1 (en) * | 1999-10-22 | 2002-10-31 | 시티즌 일렉트로닉스 가부시키가이샤 | Sound producing device for an electronic instrument such as a telephone |
| US7051835B2 (en) * | 2001-02-19 | 2006-05-30 | Genelec Oy | Bass-reflex loudspeaker system and method of manufacturing the same |
| KR20020076503A (en) * | 2001-03-29 | 2002-10-11 | 안정오 | Speaker manufacturing method using fiber and speaker |
| KR20030021288A (en) * | 2001-09-05 | 2003-03-15 | 혜성산업주식회사 | Receving unit for terminal |
| KR20020024186A (en) * | 2002-01-31 | 2002-03-29 | 황상문 | Receiving unit for the mobile phone |
| JP2005348190A (en) * | 2004-06-04 | 2005-12-15 | Elecom Co Ltd | Audio magnifier |
| JP2008070481A (en) * | 2006-09-12 | 2008-03-27 | Yazaki Corp | Instrument device and acoustic device |
| JP2015109516A (en) * | 2013-12-03 | 2015-06-11 | フジゲン株式会社 | Stand for portable electronic apparatus |
| JP2017207633A (en) * | 2016-05-19 | 2017-11-24 | 衆智達技研株式会社 | Electronic alarming horn |
| US11145286B2 (en) | 2017-03-01 | 2021-10-12 | Imasen Electric Industrial Co., Ltd. | Electronic horn |
| CN107331381A (en) * | 2017-05-12 | 2017-11-07 | 南京大学 | A kind of broadband acoustics coupler |
| WO2019092828A1 (en) * | 2017-11-09 | 2019-05-16 | 株式会社今仙電機製作所 | Electronic horn |
| US11308930B2 (en) | 2017-11-09 | 2022-04-19 | Imasen Electric Industrial Co., Ltd. | Electronic horn |
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| A02 | Decision of refusal |
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