CN211319713U - Piezoelectric horn vibration element and piezoelectric horn thereof - Google Patents
Piezoelectric horn vibration element and piezoelectric horn thereof Download PDFInfo
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- CN211319713U CN211319713U CN201921928275.6U CN201921928275U CN211319713U CN 211319713 U CN211319713 U CN 211319713U CN 201921928275 U CN201921928275 U CN 201921928275U CN 211319713 U CN211319713 U CN 211319713U
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Abstract
The utility model relates to a piezoelectric horn vibrating element and piezoelectric horn thereof, electronic component technical field has the increase vibration amplitude, reduces operating current, guarantees vocal sound quality effect and increase of service life's advantage. The piezoelectric horn vibration element comprises a metal substrate, wherein the metal substrate is circular, a first circular piezoelectric ceramic piece concentric with the metal substrate is pasted on the front surface of the metal substrate, and an annular silver coating concentric with the first piezoelectric ceramic piece is coated on one surface of the first piezoelectric ceramic piece, which deviates from the metal substrate.
Description
Technical Field
The utility model relates to an electronic component technical field especially relates to a piezoelectric horn vibrating element and piezoelectric horn thereof.
Background
A piezoelectric horn is an electroacoustic transducer device. The surface of the piezoelectric ceramic piece is coated with a silver coating, the piezoelectric ceramic piece is pasted on the metal substrate after polarization treatment to form a piezoelectric buzzer, and after a voltage is applied to two ends of the piezoelectric ceramic piece and the metal substrate, the piezoelectric buzzer can generate mechanical deformation due to the inverse piezoelectric effect, so that the sound basin is driven to vibrate to make a sound.
Piezoelectric type horn element now generally adopts node fixed stay mode, and present technology adopts the simple two-sided full electrode component of preparation to assemble, and the sound basin directly pastes on silver coating surface, leads to during operation central point load too big, and operating current risees, produces the noise easily, and leads to the sound basin to drop easily, seriously influences the service function and the life-span of product.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a piezoelectric horn vibrating element has the increase vibration amplitude, reduces operating current, guarantees vocal sound quality effect and increase of service life's advantage.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a piezoelectric horn vibrating element, includes the metal substrate, the metal substrate is circular, the first piezoceramics piece of circular shape with the metal substrate centre of a circle is pasted on the front of metal substrate, the one side coating that first piezoceramics piece deviates from the metal substrate has the cyclic annular silver coating with first piezoceramics piece centre of a circle.
Implement above-mentioned technical scheme, cyclic annular silver coating circular telegram back piezoceramics vibrating element during operation reaches the ring type vibration effect to increase vibration amplitude, reduce operating current, guarantee vocal sound tone quality effect, increase of service life.
Furthermore, the surface of the annular silver coating is coated with an annular protective adhesive layer with the same cross section as the annular silver coating, and the annular protective adhesive layer is concentric with the annular silver coating.
Implement above-mentioned technical scheme, cyclic annular silver coating surface coating cyclic annular protection glue film, protection silver coating surface avoids the oxidation, and the centre is left empty to guarantee that the sound basin is directly pasted on piezoceramics piece surface.
Furthermore, the back of the metal substrate is pasted with a second piezoelectric ceramic piece which is concentric with the metal substrate and is circular, one surface of the second piezoelectric ceramic piece, which is away from the metal substrate, is coated with a circular silver coating, the surface of the circular silver coating is coated with a circular protective adhesive layer, a metal ring is connected between the circular silver coating and the annular silver coating, and the two ends of the metal ring are respectively connected with the circular silver coating and the annular silver coating.
According to the technical scheme, the first piezoelectric ceramic piece and the second piezoelectric ceramic piece are connected in series through the metal ring, and the vibration amplitude of the double-sided piezoelectric ceramic pieces is further increased.
Furthermore, the dielectric constants of the first piezoelectric ceramic piece and the second piezoelectric ceramic piece are both 3000-5000.
By implementing the technical scheme, the planar electromechanical coupling coefficient Kp is ensured to be greater than 70%, and higher energy conversion efficiency is achieved.
Furthermore, the thickness of the first piezoelectric ceramic piece and the thickness of the second piezoelectric ceramic piece are both 0.1 mm-0.3 mm.
Furthermore, the thickness of the metal substrate is 0.05 mm-0.3 mm.
Furthermore, the area ratio of the first piezoelectric ceramic piece to the metal substrate and the area ratio of the second piezoelectric ceramic piece to the metal substrate are both 92-100%.
By implementing the technical scheme, the larger the area of the first piezoelectric ceramic piece and the second piezoelectric ceramic piece is, the better the vibration effect is.
A second object of the utility model is to provide a piezoelectric loudspeaker has the increase vibration amplitude, reduces operating current, guarantees vocal sound quality effect and increase of service life's advantage.
The above object of the present invention is achieved by the following technical solution:
a piezoelectric horn comprises the piezoelectric horn vibration element and a sound cone, wherein the sound cone is adhered to the uncovered positions of the annular silver coating and the annular protective glue layer in the center of the first piezoelectric ceramic piece.
Further, the cone is circular.
To sum up, the utility model discloses following beneficial effect has:
(1) the annular silver coating is adopted as an electrode, the silver coating is not arranged near the central point, the sound cone is directly adhered to the central position of the ceramic chip, and the sound cone is firmly adhered and is not easy to fall off; the assembly is simple, and the process is simple and reliable;
(2) when the piezoelectric horn vibrating element works, the annular vibrating effect is achieved, so that the vibration amplitude is increased, the working current is reduced, the sound production tone quality effect is ensured, and the service life is prolonged;
(3) the annular silver coating is adopted as an electrode, and the silver coating is not arranged near the central point, so that the silver consumption is reduced, and the cost is reduced.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;
fig. 2 is a schematic diagram of an explosion structure according to a first embodiment of the present invention;
fig. 3 is a schematic view of the overall structure of the second embodiment of the present invention.
Reference numerals: 1. a metal substrate; 2. a first piezoelectric ceramic sheet; 3. a ring-shaped silver coating; 4. an annular protective glue layer; 5. a second piezoelectric ceramic sheet; 6. a circular protective adhesive layer; 7. a circular silver coating; 8. a metal ring; 9. a sound basin.
Detailed Description
The technical solution of the embodiment of the present invention will be described below with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 and 2, a piezoelectric horn vibration element includes a metal substrate 1 having a circular shape. The front surface of the metal substrate 1 is adhered with a circular first piezoelectric ceramic piece 2 concentric with the metal substrate 1 through a high-temperature epoxy adhesive. One side of the first piezoelectric ceramic piece 2, which is far away from the metal substrate 1, is coated with an annular silver coating 3 which is concentric with the first piezoelectric ceramic piece 2. The annular silver coating 3 makes the piezoceramics vibrating element during operation reach annular vibration effect after the circular telegram to increase vibration amplitude, reduce operating current, guarantee vocal sound quality effect, increase of service life.
The surface of the annular silver coating 3 is coated with an annular protective glue layer 4 with the same cross section as the annular silver coating, and the annular protective glue layer 4 is concentric with the annular silver coating 3. The annular protective glue layer 4 is used for protecting the surface of the silver coating layer from being oxidized, and a space is reserved in the middle of the silver coating layer to ensure that the sound cone 9 is directly adhered to the surface of the piezoelectric ceramic piece.
The back of the metal substrate 1 is pasted with a circular second piezoelectric ceramic piece 5 concentric with the metal substrate 1 through a high-temperature epoxy adhesive, one side of the second piezoelectric ceramic piece 5 departing from the metal substrate 1 is coated with a circular silver coating 7, the surface of the circular silver coating 7 is coated with a circular protective adhesive layer 6, a metal ring 8 is connected between the circular silver coating 7 and the annular silver coating 3, and the two ends of the metal ring 8 are respectively connected with the circular silver coating 7 and the annular silver coating 3. The metal ring 8 connects the first piezoelectric ceramic piece 2 and the second piezoelectric ceramic piece 5 in series, and the double-sided piezoelectric ceramic pieces further increase the vibration amplitude.
In the embodiment, the dielectric constants of the first piezoelectric ceramic piece 2 and the second piezoelectric ceramic piece 5 are both 3000 to 5000. The planar electromechanical coupling coefficient Kp is ensured to be more than 70 percent, and higher energy conversion efficiency is achieved. The thickness of the first piezoelectric ceramic piece 2 and the thickness of the second piezoelectric ceramic piece 5 are both 0.1 mm-0.3 mm. The area ratio of the first piezoelectric ceramic piece 2 to the metal substrate 1 and the area ratio of the second piezoelectric ceramic piece 5 to the metal substrate 1 are both 92-100%. The larger the area of the first piezoelectric ceramic piece 2 and the second piezoelectric ceramic piece 5 is, the better the vibration effect is.
The thickness of the metal substrate 1 is 0.05mm to 0.3 mm. The metal substrate 1 is made of a steel sheet or a copper sheet, and other metal materials can be adopted.
Example two:
as shown in fig. 3, on the basis of the first embodiment, the second embodiment provides a piezoelectric horn, which includes the above piezoelectric horn vibration element, and the sound cone 9 is adhered to the position where the central annular silver coating 3 and the annular protective glue layer 4 of the first piezoelectric ceramic piece 2 are not covered. The cone 9 is round, the round vibration effect is best, the stress is uniform, the cone is not easy to damage, and the yield is high.
The utility model has the advantages as follows:
the annular silver coating 3 is adopted as an electrode, the silver coating is not arranged near the central point, the sound cone 9 is directly adhered to the central position of the ceramic chip, and the adhesion is firm and is not easy to fall off; the assembly is simple, and the process is simple and reliable;
when the piezoelectric horn vibrating element works, the annular vibrating effect is achieved, so that the vibration amplitude is increased, the working current is reduced, the sound production tone quality effect is ensured, and the service life is prolonged;
the annular silver coating 3 is used as an electrode, and the silver coating is not arranged near the central point, so that the silver consumption is reduced, and the cost is reduced.
Claims (9)
1. The utility model provides a piezoelectric horn vibrating element, its characterized in that includes metal substrate (1), metal substrate (1) is circular, the first piezoceramics piece (2) of circular shape with metal substrate (1) centre of a circle is pasted in the front of metal substrate (1), the one side coating that first piezoceramics piece (2) deviate from metal substrate (1) has cyclic annular silver coating (3) with first piezoceramics piece (2) centre of a circle.
2. The piezoelectric horn vibration element according to claim 1, wherein the surface of the annular silver coating (3) is coated with an annular protective glue layer (4) having the same cross section as the annular silver coating (3), and the annular protective glue layer (4) is concentric with the annular silver coating (3).
3. The piezoelectric horn vibration element according to claim 1, wherein a circular second piezoelectric ceramic piece (5) concentric with the metal substrate (1) is adhered to the back surface of the metal substrate (1), a circular silver coating (7) is coated on one surface of the second piezoelectric ceramic piece (5) away from the metal substrate (1), a circular protective adhesive layer (6) is coated on the surface of the circular silver coating (7), a metal ring (8) is connected between the circular silver coating (7) and the annular silver coating (3), and the circular silver coating (7) and the annular silver coating (3) are respectively connected to two ends of the metal ring (8).
4. The piezoelectric horn vibration element according to claim 3, wherein the dielectric constants of the first piezoelectric ceramic piece (2) and the second piezoelectric ceramic piece (5) are both 3000 to 5000.
5. A piezoelectric horn vibration element according to claim 3, wherein the thickness of the first piezoceramic sheet (2) and the thickness of the second piezoceramic sheet (5) are both 0.1mm to 0.3 mm.
6. A piezoelectric horn vibration element as claimed in claim 1, wherein the thickness of the metal substrate (1) is 0.05mm to 0.3 mm.
7. The vibration element of a piezoelectric horn according to claim 1, wherein the area ratio of the first piezoelectric ceramic plate (2) to the metal substrate (1) and the area ratio of the second piezoelectric ceramic plate (5) to the metal substrate (1) are each 92% to 100%.
8. A piezoelectric horn comprising the piezoelectric horn vibration element and the cone (9) as claimed in any one of claims 1 to 7, wherein the cone (9) is adhered to a position uncovered by the central annular silver coating (3) and the annular protective glue layer (4) of the first piezoelectric ceramic sheet (2).
9. A piezoelectric horn according to claim 8, wherein the cone (9) is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921928275.6U CN211319713U (en) | 2019-11-09 | 2019-11-09 | Piezoelectric horn vibration element and piezoelectric horn thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921928275.6U CN211319713U (en) | 2019-11-09 | 2019-11-09 | Piezoelectric horn vibration element and piezoelectric horn thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211319713U true CN211319713U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921928275.6U Active CN211319713U (en) | 2019-11-09 | 2019-11-09 | Piezoelectric horn vibration element and piezoelectric horn thereof |
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| CN (1) | CN211319713U (en) |
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- 2019-11-09 CN CN201921928275.6U patent/CN211319713U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Piezoelectric Horn vibration element and its Piezoelectric Horn Effective date of registration: 20210701 Granted publication date: 20200821 Pledgee: Development Zone sub branch of Bank of Guangzhou Co.,Ltd. Pledgor: GUANGZHOU KAILITECH ELECTRONICS Co.,Ltd. Registration number: Y2021980005667 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220805 Granted publication date: 20200821 Pledgee: Development Zone sub branch of Bank of Guangzhou Co.,Ltd. Pledgor: GUANGZHOU KAILITECH ELECTRONICS Co.,Ltd. Registration number: Y2021980005667 |