KR880000315Y1 - Double junction piezo device - Google Patents
Double junction piezo device Download PDFInfo
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- KR880000315Y1 KR880000315Y1 KR2019850006515U KR850006515U KR880000315Y1 KR 880000315 Y1 KR880000315 Y1 KR 880000315Y1 KR 2019850006515 U KR2019850006515 U KR 2019850006515U KR 850006515 U KR850006515 U KR 850006515U KR 880000315 Y1 KR880000315 Y1 KR 880000315Y1
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- piezoelectric element
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- double junction
- present
- metal plate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 단면도.1 is a cross-sectional view according to the present invention.
제2도는 종래의 단면도.2 is a conventional cross-sectional view.
제3도는 본 고안에 따른 실시예.3 is an embodiment according to the present invention.
제4도는 본 고안에 따른 음압특성 곡선이다.4 is a sound pressure characteristic curve according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 제1전극 2 : 제1압전소자1: first electrode 2: first piezoelectric element
3 : 제2전극 4 : 제2압전소자3: second electrode 4: second piezoelectric element
5 : 금속판5: metal plate
본 고안은 전원을 인가할 경우 고유 주파수를 발생시키는 압전소자에 관한 것으로, 특히 두께와 크기가 서로 다른 2개의 압전소자를 금속판위에 접착시켜 평탄한 음압특성을 얻음으로서 음색을 개선할 수 있도록한 이중 접합 압전소자에 관한 것이다.The present invention relates to a piezoelectric element that generates a natural frequency when a power is applied, and in particular, to a piezoelectric element having two thicknesses and sizes, bonded to a metal plate to obtain a flat sound pressure characteristic, thereby improving tone. It relates to a piezoelectric element.
종래의 단일 접합 또는 두께와 크기가 서로 같은 2개의 소자를 접합시킨 이중접합 압전소자에 있어서는 도선에 흐르는 신호전류의 주파수와 압전소자의 고유주파수에 일치하는 최저 공진 주파수가 단일접합일때는 낮은 음에서 이중접합일때는 간섬에 의해 높은 음에서 발생하여 진동자가 최대로 진동하며, 최대로 진동하는 상기 최저 공진주파수에서는 다른 진동주파수보다 음압이 10dB이상 크게 됨으로써 선택도가 일정한 주파수에서 사용이 가능하나, 최저 공진주파수 이외의 진동주파수는 재생하기 힘들었기 때문에 단일 주파수에 의한 단일진동으로 한가지 음색만을 들을 수 밖에 없었다.In a conventional single junction or a double junction piezoelectric element in which two elements of the same thickness and size are bonded together, at a low sound level when a single junction has a lowest resonance frequency that matches the frequency of the signal current flowing through the wire and the natural frequency of the piezoelectric element. In the case of the double junction, the vibrator vibrates to the maximum due to the high sound caused by the liver, and at the lowest resonant frequency that vibrates at the maximum, the sound pressure is increased by 10 dB or more than other vibration frequencies, so that the selectivity can be used at a constant frequency. Since vibration frequencies other than the resonance frequency were difficult to reproduce, only one sound could be heard by a single vibration by a single frequency.
따라서 본 고안은 상기와 같은 단점을 해소하기 위하여 두께와 크기가 서로 다른 압전소자를 이중으로 접합하여 금속판위에 접착시킴으로써 압전소자들의 고유 진동에 따른 상호간섬 효과를 얻고 그로인해 평탄한 음압 특성과 개선된 음색을 가지는 이중접합 압전소자를 제공하는데 목적이 있다.Therefore, the present invention obtains the mutual island effect according to the natural vibration of the piezoelectric elements by bonding the piezoelectric elements of different thicknesses and sizes to the metal plate in order to solve the above disadvantages, thereby providing a flat sound pressure characteristic and an improved tone. An object of the present invention is to provide a double junction piezoelectric element having a.
본 고안의 구성 및 작용, 효과를 예시된 도면에 의거 상세히 설명하면 다음과 같다.The configuration, operation, and effects of the present invention will be described in detail with reference to the illustrated drawings.
본 고안은 제1전극(1)을 갖는 제1압전소자(2)와 제2전극(3)을 갖는 제2압전소자(4)를 각각 크기가 다르게 형성시켜 각각의 고유주파수를 갖도록 하고, 상기 제1압전소자(2)와 제2압전소자(4)를 금속판(5)에 접착시킨 구조로 되어 있다.According to the present invention, the first piezoelectric element (2) having the first electrode (1) and the second piezoelectric element (4) having the second electrode (3) are formed in different sizes so as to have respective natural frequencies. The first piezoelectric element 2 and the second piezoelectric element 4 are bonded to the metal plate 5.
상기와 같은 구조로 된 본 고안에서는 임력 전원을 제1압전소자(2)와 제2압전소자(4)에 각각 인가하면 각각의 압전소자에 고유주파수가 발생되는 한편 상기 고유진동들간에 상호 간섭효과가 일어나 제3의 진동이 나타나게 되고, 선택도(Q1)가 낮아지고, 재생할 수 있는 주파수의 범위가 넓어져 2KHz∼15KHz까지 평탄한 음압특성을 얻을 수 있으며, 또한 2가지 음을 발생하도록 음색을 개선시킬 수가 있게 된다.According to the present invention having the structure as described above, when the force power is applied to each of the first piezoelectric element 2 and the second piezoelectric element 4, a natural frequency is generated in each piezoelectric element, and the mutual interference effect between the natural vibrations is performed. The third vibration appears, the selectivity (Q 1 ) is lowered, the range of frequencies that can be reproduced is widened, and a flat sound pressure characteristic can be obtained from 2 KHz to 15 KHz, and the tone is generated to generate two sounds. It can be improved.
제1도는 본 고안에 따른 단면도로서 제1전극(1)을 갖춘 제1압전소자(2)의 하단에 제2전극(3)을 갖춘 제2압전소자(4)를 접합시키는 한편 상기 제2압전소자(4) 하단에는 금속판(5)을 부착시킨 이중접합 압전소자를 보여 주고 있는 것인데, 제1전극(1)과 금속판(5)에는 양극이 걸리고 제2전극(3)에는 음극이 걸리게 되어 병렬회로를 구성하거나 또는 제1전극(1)에 양극, 금속판(5)에 음극을 각각 연결하여 직렬회로를 구성하여 제1압전소자(2)와 제2압전소자(4)에 고유주파수를 가지게 하며 제1, 제2압전소자의 고유 저항에 흐르는 전류에 의해 각각의 압전소자가 진동하게 된 것이다.FIG. 1 is a cross-sectional view according to the present invention in which a second piezoelectric element 4 having a second electrode 3 is bonded to a lower end of the first piezoelectric element 2 having a first electrode 1 while the second piezoelectric element is bonded. At the bottom of the device 4 is shown a double junction piezoelectric element having a metal plate 5 attached thereto. The first electrode 1 and the metal plate 5 have a positive electrode and a second electrode 3 with a negative electrode. A series circuit is formed by connecting a positive electrode to the first electrode 1 and a negative electrode to the metal plate 5 to form a circuit so that the first piezoelectric element 2 and the second piezoelectric element 4 have natural frequencies. Each piezoelectric element vibrates by the current flowing through the intrinsic resistance of the first and second piezoelectric elements.
이와같이 구성된 압전소자에서 저음과 고음에서 발생하는 압전소자들의 공진주파수가 상호 간섬을 하게되므로 선택도(Q)값이 낮아져 평탄한 음압특성을 얻을 수 있고, 또 이러한 음압특성은 중음과 고음을 재생하는 데 용이하며, 서로 다른 고유진동으로 2가지 소리를 발생시켜 음색을 개선시킬 수 있을 뿐만 아니라 선택도(Q)=R/|Z|에서 |Z|값이 일정하고 선택도(Q)값이 낮아짐에 따라 R값 즉 접촉저항이 적어져 신호 전류의 손실을 방지할 수도 있게 되는 것이다.Since the resonant frequencies of the piezoelectric elements generated in the low and high frequencies of the piezoelectric elements configured as described above are mutually intersected, the selectivity (Q) is lowered to obtain a flat sound pressure characteristic, and these sound pressure characteristics are used to reproduce the middle and high sounds. It is easy to improve the sound by generating two sounds with different natural vibrations, and the value of | Z | is constant and the value of selectivity (Q) is low at selectivity (Q) = R / | Z |. As a result, the R value, that is, the contact resistance, decreases, thereby preventing the loss of signal current.
제2도는 종래의 단면도로서, 이는 단일압전소자(a)나 두께나 크기가 서로 같고 간섬효과를 이용한 이중접합압전소자(b)는 선택도(Q)가 높아 저음 또는 고음의 일정한 음만을 특정적으로 재생할 수 밖에 없고, 고유주파수도 하나이므로 한가지 소리밖에 들을 수 없으며, 선택도(Q)가 높아 Q=R/|Z|에서 |Z|는 일정하고 접촉 저항 R값이 커짐에 따라 신호의 감쇄 즉 손실이 발생하게 된다.FIG. 2 is a cross-sectional view of the related art, which is a single piezoelectric element (a) or a double junction piezoelectric element (b) using the interstitial effect having the same thickness or size, and having a high selectivity (Q), so that only a specific sound of low or high pitch is specific. Only one sound can be heard because it has only one natural frequency, and the selectivity (Q) is high, so that QZ is constant from Q = R / | Z | and the signal attenuation increases as the contact resistance R increases. That is, a loss occurs.
제3도는 본 고안에 따른 다른 실시예로서, 이는 금속판(5) 상단에다 일정한 공진주파수 값의 제1압전소자(2)를 접착시킴과 더불어 금속판(5) 하단에다 공진주파수값이 다른 제2압전소자(4)를 접착시키고, 제1, 제2압전소자에 형성시킨 전극에다 양극을 연결하며 금속판(5)에는 음극을 연결하여 병렬회로를 구성하게 된 것으로서, 그에 따른 작용효과는 제1도의 실시예와 동일하다.3 is another embodiment according to the present invention, which bonds the first piezoelectric element 2 having a constant resonant frequency value to the top of the metal plate 5 and the second piezoelectric element having a different resonant frequency value to the bottom of the metal plate 5. The device 4 is bonded, the positive electrode is connected to the electrodes formed on the first and second piezoelectric elements, and the negative electrode is connected to the metal plate 5 to form a parallel circuit. Same as the example.
제4도는 본 고안에 따른 음압특성곡선을 나타낸 것으로서, 점선으로 표시한 종래의 특성에서는 선택도(Q)값이 높아 일정한 음밖에 재생할 수 없는 반면, 실선으로 표시한 본 고안의 특성은 2K~15KHz 까지 중음과 고음을 재생할 수가 있도록 되었다.4 shows a sound pressure characteristic curve according to the present invention, while the conventional characteristic indicated by the dotted line has a high selectivity (Q) value so that only a certain sound can be reproduced, while the characteristic of the present invention indicated by a solid line is 2K to 15KHz. Now you can play mid and high notes.
상기와 같은 구성 및 작용에 의해 본 고안은 선택도(Q)값이 낮아져 평탄한 음압특성으로 2K∼15KHz까지 중음과 고음을 얻을 수 있으며, 압전소자의 접촉저항이 적어짐으로써 신호의 손실을 방지하고, 서로 다른 고유 주파수로 2가지 혼합된 음을 들을 수 있어 음색을 개선한 효과를 얻을 수 있다.Due to the configuration and action as described above, the present invention has a low selectivity (Q) value, so that it is possible to obtain midtones and trebles from 2K to 15KHz with flat sound pressure characteristics, and to prevent loss of signals by reducing contact resistance of piezoelectric elements. You can hear two mixed notes at different natural frequencies, resulting in an improved tone.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850006515U KR880000315Y1 (en) | 1985-05-31 | 1985-05-31 | Double junction piezo device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850006515U KR880000315Y1 (en) | 1985-05-31 | 1985-05-31 | Double junction piezo device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860015380U KR860015380U (en) | 1986-12-30 |
| KR880000315Y1 true KR880000315Y1 (en) | 1988-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019850006515U KR880000315Y1 (en) | 1985-05-31 | 1985-05-31 | Double junction piezo device |
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| Country | Link |
|---|---|
| KR (1) | KR880000315Y1 (en) |
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1985
- 1985-05-31 KR KR2019850006515U patent/KR880000315Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR860015380U (en) | 1986-12-30 |
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