Piezoelectric drive assembly and system

Abstract

The utility model discloses a piezoelectric drive assembly and system relates to piezoelectric drive technical field, and piezoelectric drive assembly includes: piezoelectric layer, the electrode of opposite setting, positive pole connector and negative pole connector, piezoelectric layer can produce inverse piezoelectric effect, and the side surface of piezoelectric layer is structured with multiple piezoelectric grooves that set in turn and have interval, and piezoelectric groove penetrates the first end face and the second end face of piezoelectric layer, the electrode is divided into positive electrode and negative electrode, and one kind of electrode is arranged in each piezoelectric groove, and the electrode in any two adjacent piezoelectric grooves is respectively positive electrode and negative electrode, the number of positive pole connector is same with positive electrode, and all are set up on the first end face and are connected with positive electrode, and the setting mode of negative pole connector has two, mode one: set up on the second end face and are connected with all negative electrode, mode two: set up on the end face of the slot cover plate above the first end face, and set up one place or several places, and are connected with all negative electrode, the utility model can improve the upper limit of drive control resolution.

Description

Technical Field

[0001] This utility model relates to the field of piezoelectric drive technology, and in particular to a piezoelectric drive component and system. Background Technology

[0002] Piezoelectric actuation technology refers to the process where, when an external electric field is applied to certain crystals or polymers, their internal lattice structure undergoes minute deformation (strain), resulting in macroscopic dimensional changes in the material as a whole. By precisely controlling the voltage applied to the piezoelectric material, the minute deformations (usually at the micrometer or nanometer level) can be precisely controlled, thereby driving the load to produce precise displacement or output force.

[0003] Piezoelectric drive technology is commonly used as a drive component in devices such as air pumps, liquid pumps, acoustic wave detection, as a reflective unit for lidar, microfluidic controllers, and microdroplet controllers.

[0004] However, in the original piezoelectric drive technology, the positive and negative electrodes of the drive circuit are both led out from one side of the ceramic actuator. This method of leading out the positive and negative electrodes from one side results in a low upper limit for the number of electrodes per unit area due to manufacturing process limitations, which in turn leads to a low upper limit for drive control resolution. Therefore, a new solution is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a piezoelectric drive component and system to solve the problems existing in the prior art, improve the upper limit of drive control resolution, and reduce manufacturing costs.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a piezoelectric drive assembly, comprising:

[0008] The piezoelectric layer is capable of generating the inverse piezoelectric effect. One side of the piezoelectric layer is constructed with a plurality of piezoelectric grooves arranged sequentially and spaced apart. The piezoelectric grooves penetrate the first end face and the second end face of the piezoelectric layer.

[0009] The electrodes are arranged in pairs, namely positive and negative electrodes. Each piezoelectric cell contains one type of electrode, and the electrodes in any two adjacent piezoelectric cells are respectively positive and negative electrodes.

[0010] The number of positive terminals is the same as that of the positive electrodes, and they are all disposed on the first end face and connected to the positive electrodes.

[0011] There are two ways to set up the negative terminal:

[0012] Method 1: It is disposed on the second end face and connected to all of the negative electrodes;

[0013] Method 2: One or more of the slot cover plates located above the first end face are provided, and the negative electrode connector is connected to all of the negative electrodes.

[0014] Preferably, in Method 1, the negative terminal is provided with one or more.

[0015] Preferably, only one or more of the negative electrodes extend to the first end face to form one or more total negative electrode terminals, and the number of total negative electrode terminals is less than the number of negative electrodes.

[0016] Preferably, when only one of the negative electrodes extends to the first end face to form one total negative electrode connector, only the outermost negative electrode extends to the first end face to form the total negative electrode connector.

[0017] Preferably, the negative electrode connector, positive electrode connector, positive electrode, and negative electrode are all made of metallic materials.

[0018] Preferably, the dimensional difference between the width of the positive electrode connector and the width of the piezoelectric groove is no greater than 2 mm.

[0019] Preferably, the inner wall of the piezoelectric groove is covered with a metal coating to form the electrode.

[0020] Preferably, the plurality of piezoelectric grooves are arranged in parallel and in an array.

[0021] This utility model also provides a piezoelectric drive system, including the piezoelectric drive component and control system as described above, wherein the control system is connected to both the positive terminal and the negative terminal.

[0022] Preferably, the control system is an IC controller.

[0023] The present invention achieves the following technical advantages over the prior art:

[0024] The piezoelectric drive assembly provided by this utility model abandons the original scheme of setting the positive and negative terminals on the same end face and at the same height of the piezoelectric layer. By setting the positive and negative terminals on two opposite end faces of the piezoelectric layer, or setting the positive and negative terminals one above the other, it is beneficial to the subsequent wiring process. To a certain extent, it improves the defect of low upper limit of the number of electrode pairs per unit area due to wiring. Ideally, the upper limit of the number can be doubled, that is, the electrode pair setting density is doubled, and the drive control resolution can be doubled accordingly.

[0025] On the other hand, under the same driving control resolution, the spacing between the electrode connectors of the piezoelectric drive assembly provided by this utility model is larger, which reduces the requirements for electrode connectors and wire connection processes, improves the product qualification rate, and reduces manufacturing costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a piezoelectric drive assembly in the prior art where both the positive and negative terminals are located at the same end.

[0028] Figure 2 This is a schematic diagram of the piezoelectric drive assembly and control system in an embodiment of the present invention, in which the positive terminal and the negative terminal are respectively disposed at both ends;

[0029] Figure 3 This is a schematic diagram of the structure on the second end face of the piezoelectric drive assembly when a main negative electrode connector connected to the negative electrode is provided on the first end face in an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the piezoelectric drive assembly and control system with a main negative electrode connector connected to the negative electrode on the first end face in this embodiment of the present invention.

[0031] Figure 5 for Figure 2 Front view of the medium-voltage electric drive assembly;

[0032] Figure 6 This is a schematic diagram of the piezoelectric drive assembly and control system with the negative electrode connector disposed on the end face of the slot cover plate in this embodiment of the present invention.

[0033] In the diagram: 1-Control system; 2-Piezoelectric layer; 3-Piezoelectric groove; 4-Positive electrode connector; 5-Negative electrode; 6-Positive electrode; 7-Main negative electrode connector; 8-Negative electrode connector; 9-Groove cover plate. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] The purpose of this invention is to provide a piezoelectric drive component and system to solve the problems existing in the prior art, improve the upper limit of drive control resolution, and reduce manufacturing costs.

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] First, some technical terms involved in the embodiments of this application will be introduced.

[0038] The drive control resolution refers to the fineness of control. For example, if only a pairs of electrodes are set on a unit area of ​​the piezoelectric layer for drive control, the drive control resolution is A. Then, if only 2a pairs of electrodes are set on a unit area of ​​the piezoelectric layer for drive control, the drive control resolution is 2A.

[0039] Electrode connectors, such as negative and positive connectors, do not impose any restrictions on their structure; their shape can be sheet-like, strip-like, or dot-like.

[0040] For ease of understanding, the following analysis is provided:

[0041] The inventors discovered that one of the reasons limiting the upper limit of the number of electrode pairs in existing piezoelectric drive components is that the electrode connectors need to be connected to the control system via wires. Wires are solid structures with a certain diameter. In the prior art, each electrode connector corresponds to one wire, and adjacent electrode connectors also need to be spaced apart. This limits the upper limit of the number of electrode pairs. In other words, when using the existing scheme of setting the positive and negative electrode connectors on the same end face and at the same height of the piezoelectric layer, when the number of electrode pairs exceeds the upper limit, the existing manufacturing process makes it difficult to independently wire each electrode connector. Based on this, the present invention provides the following embodiments to solve the above problems.

[0042] The following is combined Figures 1 to 6 The following describes embodiments of the present invention. Only a portion of the structure is shown in the figures. In actual implementation, the structure can be continued or expanded in groups.

[0043] Example 1

[0044] This utility model provides a piezoelectric drive assembly, including: a piezoelectric layer 2, paired electrodes, a positive electrode connector 4, and a negative electrode connector 8. The piezoelectric layer 2 is capable of generating an inverse piezoelectric effect. One side of the piezoelectric layer 2 has a plurality of sequentially arranged and spaced piezoelectric grooves 3, which penetrate the first end face and the second end face of the piezoelectric layer 2. The electrodes are divided into positive electrodes 6 and negative electrodes 5, and each piezoelectric groove 3 contains one type of electrode. The electrodes in any two adjacent piezoelectric grooves 3 are respectively the positive electrode 6 and the negative electrode 5. The number of positive electrode connectors 4 is the same as that of the positive electrodes 6, and they are all arranged on the first end face and connected to the positive electrodes 6. The negative electrode connectors 8 are arranged in two ways:

[0045] Method 1: Set on the second end face and connected to all negative electrodes 5; In this method, the positive electrode connector 4 and the negative electrode connector 8 are respectively set on the two opposite end faces of the piezoelectric layer 2, which overcomes the defect of low drive control resolution caused by difficult wiring in the prior art.

[0046] Method 2: One or more negative electrodes 5 are centrally located on the end face of the slot cover plate 9 above the first end face and connected to all negative electrodes 5. In this method, although the positive electrode connector 4 and the negative electrode connector 8 are respectively located at one end of the piezoelectric layer 2, they are at different heights, and one negative electrode connector 8 is connected to all negative electrodes 5. This achieves the goal of connecting only one or a few wires to the negative electrode, which can also overcome the defect of low drive control resolution caused by difficult wiring in the prior art.

[0047] The piezoelectric drive assembly provided by this utility model abandons the original scheme of setting the positive electrode connector 4 and the negative electrode connector 8 on the same end face and at the same height of the piezoelectric layer 2. By setting the positive electrode connector 4 and the negative electrode connector 8 on two opposite end faces of the piezoelectric layer 2, or setting the positive electrode connector 4 and the negative electrode connector 8 one above the other, it is beneficial to the subsequent wiring process. To a certain extent, it improves the defect of low upper limit of the number of electrode pairs per unit area due to wiring. Ideally, the upper limit of the number can be doubled, that is, the electrode pair setting density is doubled, and the drive control resolution can be doubled accordingly.

[0048] On the other hand, under the same driving control resolution, the spacing between the electrode connectors of the piezoelectric drive assembly provided by this utility model is larger, which reduces the requirements for electrode connectors and wire connection processes, improves the product qualification rate, and reduces manufacturing costs.

[0049] In some embodiments, in Method 1, the negative terminal 8 is provided with one or more.

[0050] In this embodiment, it is preferable to set only one negative terminal 8, and set only one negative terminal 8 on the second end face, that is, a long strip of metal layer. This achieves the purpose of using only one wire to make all the negative electrodes 5 connected to the control system 1 in the first method, further simplifying the wiring and reducing the cost.

[0051] Of course, in some examples, in Method 1, the number of negative terminals 8 can also be set to be equal to the number of negative electrodes 5, which can also solve the problem overlooked in the background art.

[0052] In some embodiments, only one or more negative electrodes extend to the first end face to form one or more total negative terminals, and the number of total negative terminals is less than the number of negative electrodes.

[0053] In this embodiment, preferably only one negative electrode extends to the first end face to form a single negative electrode connector. This embodiment achieves the goal of laying all the circuitry at one end of the piezoelectric layer 2, further simplifying the circuitry layout.

[0054] Of course, multiple electrodes can be set, but the number of electrodes should be less than the number of negative electrodes. It is preferable to set two electrodes, that is, the two outermost negative electrodes 5 extend to the first end face to form two total negative electrode terminals 7.

[0055] In some embodiments, when only one negative electrode extends to the first end face to form a total negative electrode connector, only the outermost negative electrode 5 extends to the first end face to form a total negative electrode connector 7.

[0056] In this embodiment, the main negative terminal 7 and the positive terminal 4 are arranged at the same height, but the main negative terminal 7 is located at the head or end of all electrode terminals. This makes it easier for workers to distinguish the types of terminals, and this arrangement can also simplify the wiring process.

[0057] In some examples, any one of the negative electrodes 5 in the middle can be extended to the first end face to form a total negative electrode connector 7.

[0058] In some embodiments, the negative terminal 8, the positive terminal 4, the positive electrode 6, and the negative electrode 5 are all made of metallic materials.

[0059] This embodiment provides a construction method for the negative electrode connector 8, the positive electrode connector 4, the positive electrode 6, and the negative electrode 5. In other embodiments, any mature technology in the prior art can be used to manufacture the negative electrode connector 8, the positive electrode connector 4, the positive electrode 6, and the negative electrode 5.

[0060] In some embodiments, the width of the positive electrode connector 4 and the width of the piezoelectric groove 3 are close, for example, the difference in width is no more than 2 mm.

[0061] In some embodiments, the piezoelectric groove 3 has a rectangular cross-section, and the three inner walls of the piezoelectric groove 3 are coated with metal films to form electrodes. In other examples, the cross-section of the piezoelectric groove 3 may also be other regular shapes, such as circles.

[0062] In some embodiments, the piezoelectric drive assembly is a piezoelectric printhead, wherein any two adjacent piezoelectric slots 3 are used as ink suction slots and ink jet slots, respectively, and have ink suction and ink jet functions. The plurality of piezoelectric slots 3 are sequentially divided into multiple pairs of working units, each working unit including two piezoelectric slots 3.

[0063] This utility model embodiment combines two adjacent piezoelectric slots 3 into a single working unit, which simplifies the control technology of the piezoelectric slots 3 and makes the design of the hardware and software in the piezoelectric drive system more optimized and concise.

[0064] about Figure 4 Due to the limitations of the drawing's perspective, and to avoid showing the structure of the negative terminal on the second end face, Figure 4 The negative electrode connector on the second end face is a long strip structure arranged in a centralized manner, which is connected to all the negative electrodes, such as... Figure 3 As shown.

[0065] Example 2

[0066] This utility model provides a piezoelectric drive system, including a piezoelectric drive component and a control system 1 as shown in the above embodiment. The control system 1 is connected to the positive terminal 4 and the negative terminal 8.

[0067] The control system 1 in this embodiment has the function of energizing the positive electrode 6 and the negative electrode 5 and controlling the energizing process.

[0068] In some embodiments, the control system 1 is an IC controller.

[0069] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A piezoelectric drive assembly, characterized by: include: The piezoelectric layer is capable of generating the inverse piezoelectric effect. One side of the piezoelectric layer is constructed with a plurality of piezoelectric grooves arranged sequentially and spaced apart. The piezoelectric grooves penetrate the first end face and the second end face of the piezoelectric layer. The electrodes are arranged in pairs, namely positive and negative electrodes. Each piezoelectric cell contains one type of electrode, and the electrodes in any two adjacent piezoelectric cells are respectively positive and negative electrodes. The number of positive terminals is the same as that of the positive electrodes, and they are all disposed on the first end face and connected to the positive electrodes. There are two ways to set up the negative terminal: Method 1: It is disposed on the second end face and connected to all of the negative electrodes; Method 2: One or more of the slot cover plates located above the first end face are provided, and the negative electrode connector is connected to all of the negative electrodes.

2. The piezoelectric drive assembly of claim 1, wherein: In Method 1, the negative terminal is provided with one or more.

3. The piezoelectric drive assembly of claim 2, wherein: Only one or more of the negative electrodes extend to the first end face to form one or more total negative terminals, and the number of total negative terminals is less than the number of negative electrodes.

4. The piezoelectric drive assembly of claim 3, wherein: When only one of the negative electrodes extends to the first end face to form one total negative electrode connector, only the outermost negative electrode extends to the first end face to form a total negative electrode connector.

5. The piezoelectric drive assembly of claim 1, wherein: The negative terminal, positive terminal, positive electrode, and negative electrode are all made of metallic materials.

6. The piezoelectric drive assembly of claim 1, wherein: The difference in size between the width of the positive electrode connector and the width of the piezoelectric groove is no greater than 2 mm.

7. The piezoelectric drive assembly of claim 1, wherein: The inner wall of the piezoelectric cell is covered with a metal coating to form the electrode.

8. The piezoelectric drive assembly of claim 1, wherein: The piezoelectric grooves are arranged in parallel and in an array.

9. A piezoelectric drive system characterized by: The system includes the piezoelectric drive assembly and control system according to any one of claims 1 to 8, wherein the control system is connected to both the positive terminal and the negative terminal.

10. The piezoelectric drive system of claim 9, wherein: The control system is an IC controller.

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