CN220457820U - Piezoelectric actuator - Google Patents
Piezoelectric actuator Download PDFInfo
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- CN220457820U CN220457820U CN202322066414.1U CN202322066414U CN220457820U CN 220457820 U CN220457820 U CN 220457820U CN 202322066414 U CN202322066414 U CN 202322066414U CN 220457820 U CN220457820 U CN 220457820U
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- negative electrode
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- 239000000919 ceramic Substances 0.000 claims abstract description 137
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000000853 adhesive Substances 0.000 abstract description 28
- 230000001070 adhesive effect Effects 0.000 abstract description 28
- 238000010276 construction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The utility model relates to the technical field of electrical elements, and discloses a piezoelectric actuator, which comprises a substrate, a bonding pad, piezoelectric ceramics and an adhesive sheet, wherein the bonding pad, the piezoelectric ceramics and the adhesive sheet are arranged on the substrate, the bonding pad is fixedly connected with the substrate, the piezoelectric ceramics is positioned at the top of the bonding pad and partially covers the bonding pad, the adhesive sheet is arranged between the bonding pad and the piezoelectric ceramics and is used for connecting the bonding pad and the piezoelectric ceramics, the ceramic anode of the piezoelectric ceramics is connected with the anode disc of the bonding pad, and the ceramic cathode of the piezoelectric ceramics is connected with the cathode disc of the bonding pad. Compared with the prior art, the piezoelectric actuator simplifies the structural design, does not use conductive adhesive to connect piezoelectric ceramics and a bonding pad, and optimizes the construction process.
Description
Technical Field
The utility model relates to the technical field of electrical components, in particular to a piezoelectric actuator.
Background
The piezoelectric actuator is an electrical element formed by utilizing the inverse piezoelectric effect of piezoelectric materials, has the advantages of large output force, strong electromagnetic interference resistance, low power consumption, long service life, quick response, high precision, easy control, small mass and the like, and is further widely used for touch vibration feedback of screens in electronic products.
The existing electric actuator has the problems of high cost and complex process in the production process, and particularly as shown in fig. 1 and 2, the piezoelectric actuator comprises a substrate 100, a bonding pad 200 and a piezoelectric ceramic 300 which are arranged on the substrate 100, when the piezoelectric actuator is assembled, the piezoelectric ceramic 300 and the bonding pad 200 are required to be connected by using a conductive adhesive 400, and the manufacturing process of the whole structure is complex and the cost is high; further, since the conductive adhesive 400 is used for connection, both sides of the piezoelectric ceramic 300 need to be processed into a flanging electrode structure to form a corresponding ceramic positive electrode and a ceramic negative electrode, and this step clearly increases the manufacturing cost and the processing difficulty.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide the piezoelectric actuator, which simplifies the existing structural design, can meet the use requirement by flanging only one side of piezoelectric ceramic, does not need to be coated with conductive adhesive, has simpler production process and effectively controls the cost.
Based on this, the present utility model provides a piezoelectric actuator, comprising:
a substrate;
the bonding pads are arranged on the substrate and fixedly connected with the substrate, a plurality of groups of bonding pads are arranged in pairs, and the electrodes of two bonding pads in each group are opposite;
the piezoelectric ceramic is arranged on the substrate, the top part of the piezoelectric ceramic, which is positioned on the bonding pad, covers the bonding pad, a ceramic positive electrode and a ceramic negative electrode are respectively formed on the top surface and the bottom surface of the piezoelectric ceramic, the ceramic positive electrode is connected with a positive electrode plate of the bonding pad, and the ceramic negative electrode is connected with a negative electrode plate of the same group of positive electrode plates after being turned up;
the bonding sheet is arranged between the bonding pad and the piezoelectric ceramic and is respectively connected with the bonding pad and the piezoelectric ceramic, and the bonding sheet is used for connecting the bonding pad and the piezoelectric ceramic.
In some embodiments of the present application, the bonding sheet includes a positive connection sheet and a negative connection sheet, the ceramic positive electrode of the piezoelectric ceramic is connected with the positive electrode plate of the bonding pad through the positive connection sheet, and the ceramic negative electrode of the piezoelectric ceramic is connected with the negative electrode plate of the bonding pad through the negative connection sheet.
In some embodiments of the present application, the bonding pad is provided with two groups, wherein one group of the positive electrode disc and the negative electrode disc of the bonding pad are respectively connected with the ceramic positive electrode and the ceramic negative electrode of the piezoelectric ceramic, and the other group of the positive electrode disc and the negative electrode disc of the bonding pad are used for connecting an external lead.
In some embodiments of the present application, the bottom surface of the piezoelectric ceramic is the ceramic anode, the top surface of the piezoelectric ceramic is the ceramic cathode, and the ceramic cathode is turned over and then positioned on the side edge of the piezoelectric ceramic.
In some embodiments of the present application, the surface of the ceramic negative electrode is coated with a conductive adhesive, and the ceramic negative electrode is welded and connected with the negative electrode plate through the conductive adhesive.
Compared with the prior art, the piezoelectric actuator provided by the embodiment of the utility model has the beneficial effects that:
the utility model provides a piezoelectric actuator, which comprises a substrate, a bonding pad, piezoelectric ceramics and bonding sheets, wherein the bonding pad is arranged on the substrate and fixedly connected with the substrate, a plurality of groups of bonding pads are arranged in pairs, the electrodes of two bonding pads in each group are opposite, namely the bonding pad comprises a plurality of groups of positive electrode plates and negative electrode plates which are arranged in pairs, the piezoelectric ceramics is arranged on the substrate and is positioned at the top part of the bonding pad to cover the bonding pad, the top surface and the bottom surface of the piezoelectric ceramics are respectively provided with a ceramic positive electrode and a ceramic negative electrode, the ceramic positive electrode is connected with the positive electrode plates of the bonding pads, the ceramic negative electrode is connected with the negative electrode plates of the same group of the positive electrode plates after being turned up, and the bonding sheets are arranged between the bonding pad and the piezoelectric ceramics and are respectively connected with the bonding pads and the piezoelectric ceramics. Based on the structure, firstly, the bonding pad is fixed on the substrate to realize the effective connection between the bonding pad and the substrate during assembly, then, the bonding pad or the piezoelectric ceramic is selectively arranged to ensure that the structure connected with the bonding pad is connected with another structure again after the bonding pad is effectively connected with any part of the bonding pad or the piezoelectric ceramic, when the bonding pad is connected with the bonding pad, the piezoelectric ceramic is covered on the bonding pad to realize the effective connection between the piezoelectric ceramic and the bonding pad, and when the piezoelectric ceramic is connected with the bonding pad, the piezoelectric ceramic with the bonding pad is covered on the bonding pad to realize the effective connection between the bonding pad and the bonding pad. So, this application utilizes the bonding pad that has electric conductivity to connect piezoceramics and bonding pad, no longer need scribble at piezoceramics's surface and establish conductive adhesive in order to realize its switch on with the bonding pad, saved corresponding conductive adhesive point and glued the process, very big optimization construction technology, the structural design of piezoactuator has also been simplified in the abandonment of conductive adhesive simultaneously, is favorable to controlling manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of a prior art piezoelectric actuator;
FIG. 2 is a schematic diagram of a piezoelectric ceramic mounting of a piezoelectric actuator according to the prior art;
FIG. 3 is a schematic illustration of a piezoelectric actuator according to some embodiments of the present utility model;
fig. 4 is a schematic illustration of mounting a piezoelectric ceramic according to some embodiments of the present utility model.
In the figure, 1, a substrate; 2. a bonding pad; 21. a positive electrode plate; 22. a negative electrode plate; 3. piezoelectric ceramics; 31. a ceramic positive electrode; 32. a ceramic negative electrode; 4. an adhesive sheet; 100. a substrate; 200. a bonding pad; 300. piezoelectric ceramics; 400. and (5) conducting resin.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
It should be understood that the terms "front", "rear", etc. are used in the present utility model to describe various information, but the information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, "front" information may also be referred to as "rear" information, and "rear" information may also be referred to as "front" information, without departing from the scope of the utility model.
As shown in fig. 3 to 4, the present utility model provides a piezoelectric actuator, which includes a substrate 1, a bonding pad 2 provided on the substrate 1, piezoelectric ceramics 3 and an adhesive sheet 4, wherein the bonding pad 2 is provided on the substrate 1 and fixedly connected with the substrate 1, the bonding pad 2 is provided with a plurality of groups in pairs, the electrodes of two bonding pads 2 in each group are opposite, that is, the bonding pad 2 includes a plurality of groups of anode plates 21 and cathode plates 22 provided in pairs, the piezoelectric ceramics 3 is provided on the substrate 1 and is located at the top part of the bonding pad 2 to cover the bonding pad 2, the top surface and the bottom surface of the piezoelectric ceramics 3 are respectively formed with a ceramic anode 31 and a ceramic cathode 32, wherein the ceramic anode 31 is connected with the anode plate 21 of the bonding pad 2, the ceramic cathode plate 32 is connected with the cathode plate 22 of the same group as the anode plate 21 after being turned, and the adhesive sheet 4 is provided between the bonding pad 2 and the piezoelectric ceramics 3 and is respectively connected with the anode plate 2, and the adhesive sheet 4 in the application is used for connecting the bonding pad 2 and the piezoelectric ceramics 3.
Based on the above structure, during assembly, firstly, the bonding pad 2 is fixed on the substrate 1 to effectively connect the bonding pad 2 with the substrate 1, then, the bonding sheet 4 is arranged on the bonding pad 2 or the piezoelectric ceramic 3, after the bonding sheet 4 is effectively connected with any one of the two components, the structure connected with the bonding sheet 4 is connected with the other structure again, when the bonding pad 2 is connected with the bonding sheet 4, the piezoelectric ceramic 3 is covered on the bonding pad 2 to effectively connect the piezoelectric ceramic 3 with the bonding sheet 4, and when the piezoelectric ceramic 3 is connected with the bonding sheet 4, the piezoelectric ceramic 3 with the bonding sheet 4 is covered on the bonding pad 2 to effectively connect the bonding pad 2 with the bonding sheet 4. So, this application utilizes bonding pad 4 that has electric conductivity to connect piezoceramics 3 and bonding pad 2, no longer need scribble at piezoceramics 3's surface and establish conductive adhesive in order to realize its switch on with bonding pad 2, has saved corresponding conductive adhesive point and has glued the process, very big optimization construction technology, and the structural design of piezoactuator has also been simplified in the abandonment of conductive adhesive simultaneously, is favorable to controlling manufacturing cost.
Alternatively, for the adhesive sheet 4 of the present application, it includes a positive connection sheet and a negative connection sheet, the ceramic positive electrode 31 of the piezoelectric ceramic 3 is connected to the positive electrode plate 21 of the bonding pad 2 through the positive connection sheet, and the ceramic negative electrode 32 of the piezoelectric ceramic 3 is connected to the negative electrode plate 22 of the bonding pad 2 through the negative connection sheet. The positive connecting sheet and the negative connecting sheet are designed independently, so that the mutual conduction between different bonding sheets 4 is avoided, and the normal use of the whole piezoelectric actuator is prevented.
Further, in the embodiment of the present utility model, the bonding pads 2 are provided with two groups, wherein the positive electrode pad 21 and the negative electrode pad 22 of one group of bonding pads 2 are respectively connected with the ceramic positive electrode 31 and the ceramic negative electrode 32 of the piezoelectric ceramic 3, and the positive electrode pad 21 and the negative electrode pad 22 of the other group of bonding pads 2 are used for connecting external leads to effectively connect the piezoelectric actuator with other components.
Furthermore, in the embodiment of the present utility model, the bottom surface of the piezoelectric ceramic 3 is the ceramic positive electrode 31, the top surface of the piezoelectric ceramic 3 is the ceramic negative electrode 32, at this time, the bottom surface of the piezoelectric ceramic 3 can be directly and fixedly connected with the positive electrode plate 21 of the bonding pad 2 through the bonding sheet 4, the ceramic negative electrode 32 positioned on the top surface of the piezoelectric ceramic 3 needs to be turned over once, and the turned-over ceramic negative electrode 32 is positioned on the side edge of the piezoelectric ceramic 3 and can be continuously and fixedly connected with the negative electrode plate 22 of the bonding pad 2 positioned below the piezoelectric ceramic 3 through the bonding sheet 4.
In addition, for the ceramic anode 32 located on the side, it may be connected to the anode disk 22 of the bonding pad 2 by conductive paste as well, that is, the surface of the ceramic anode 32 may be coated with conductive paste, and the ceramic anode 32 is welded to the anode disk 22 by conductive paste. In fact, if the flanging electrode is not adopted, the laying thickness of the conductive adhesive can be increased to cover the ceramic cathode 32, but the thickness of the conductive adhesive is too large, so that the whole volume of the piezoelectric actuator is increased, the miniaturization design of the whole piezoelectric actuator is not facilitated, more flanging electrode structures are adopted in the prior art, and the electrodes on two sides of the ceramic are all connected to the side edges of the ceramic in a turnover mode, so that the conductive adhesive is continuously adopted for conducting. The application makes the improvement on this basis and utilizes adhesive linkage lug connection to be located the anodal 31 of ceramic or the anodal 32 of ceramic of 3 bottom surfaces one side of piezoceramics, only need at this moment to the ceramic negative pole 32 or the anodal 31 of opposite side do the turn-ups processing can, promptly this application only need adopt once turn-ups structure when pasting and establish piezoceramics 3, has simplified the structure, has optimized construction technology.
In summary, the utility model provides a piezoelectric actuator, which comprises a substrate, a bonding pad, piezoelectric ceramics and an adhesive sheet, wherein the bonding pad, the piezoelectric ceramics and the adhesive sheet are arranged on the substrate, the bonding pad is fixedly connected with the substrate, the piezoelectric ceramics is positioned at the top of the bonding pad and partially covers the bonding pad, the adhesive sheet is arranged between the bonding pad and the piezoelectric ceramics and is used for connecting the bonding pad and the piezoelectric ceramics, the ceramic positive electrode of the piezoelectric ceramics is connected with the positive electrode disc of the bonding pad, and the ceramic negative electrode of the piezoelectric ceramics is connected with the negative electrode disc of the bonding pad. Compared with the prior art, the piezoelectric actuator simplifies the structural design, does not use conductive adhesive to connect piezoelectric ceramics and a bonding pad, and optimizes the construction process.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (5)
1. A piezoelectric actuator, comprising:
a substrate;
the bonding pads are arranged on the substrate and fixedly connected with the substrate, a plurality of groups of bonding pads are arranged in pairs, and the electrodes of two bonding pads in each group are opposite;
the piezoelectric ceramic is arranged on the substrate, the top part of the piezoelectric ceramic, which is positioned on the bonding pad, covers the bonding pad, a ceramic positive electrode and a ceramic negative electrode are respectively formed on the top surface and the bottom surface of the piezoelectric ceramic, the ceramic positive electrode is connected with a positive electrode plate of the bonding pad, and the ceramic negative electrode is connected with a negative electrode plate of the same group of positive electrode plates after being turned up;
the bonding sheet is arranged between the bonding pad and the piezoelectric ceramic and is respectively connected with the bonding pad and the piezoelectric ceramic, and the bonding sheet is used for connecting the bonding pad and the piezoelectric ceramic.
2. The piezoelectric actuator of claim 1 wherein the bonding pad comprises a positive connection pad through which the ceramic positive electrode of the piezoelectric ceramic is connected to the positive plate of the bonding pad and a negative connection pad through which the ceramic negative electrode of the piezoelectric ceramic is connected to the negative plate of the bonding pad.
3. The piezoelectric actuator according to claim 1 or 2, wherein the bonding pads are provided in two groups, wherein the positive electrode pad and the negative electrode pad of one group are respectively connected with the ceramic positive electrode and the ceramic negative electrode of the piezoelectric ceramic, and the positive electrode pad and the negative electrode pad of the other group are used for connecting an external lead.
4. The piezoelectric actuator of claim 3 wherein the bottom surface of the piezoelectric ceramic is the ceramic anode, the top surface of the piezoelectric ceramic is the ceramic cathode, and the ceramic cathode is turned over and then positioned on the side edge of the piezoelectric ceramic.
5. The piezoelectric actuator of claim 4 wherein the surface of the ceramic negative electrode is coated with a conductive paste, and the ceramic negative electrode is welded to the negative electrode plate by the conductive paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322066414.1U CN220457820U (en) | 2023-07-27 | 2023-07-27 | Piezoelectric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322066414.1U CN220457820U (en) | 2023-07-27 | 2023-07-27 | Piezoelectric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220457820U true CN220457820U (en) | 2024-02-06 |
Family
ID=89739762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322066414.1U Active CN220457820U (en) | 2023-07-27 | 2023-07-27 | Piezoelectric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220457820U (en) |
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2023
- 2023-07-27 CN CN202322066414.1U patent/CN220457820U/en active Active
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