Piezoelectric vibrator not easy to damage and electronic product

Abstract

The embodiment of the utility model relates to the technical field of voltage electric vibration, and discloses a piezoelectric vibrator not easy to damage and an electronic product, the piezoelectric vibrator comprises a flexible plate, the flexible plate is provided with an insulating film and a resistor, the insulating film divides a first surface of the flexible plate into a first conductive area and a second conductive area which are not communicated, and the resistor is arranged in the first conductive area; the first conductive area and the second conductive area have different electrical properties after being connected with an external power supply; the piezoelectric ceramic comprises a first piezoelectric region and a second piezoelectric region which are not communicated, the first piezoelectric region is in contact with at least part of the first conductive region, and the second piezoelectric region is in contact with at least part of the second conductive region; one end of the resistor is contacted with the first conductive area, and the other end is contacted with the second conductive area. Through the mode, the piezoelectric vibrator provided by the embodiment of the utility model is not easy to damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of voltage electric vibration, in particular to a piezoelectric vibrator not easy to be damaged and electronic product. BACKGROUND

[0002] During the production and manufacturing process of the piezoelectric vibrator, the change of the ambient temperature and the external applied pressure force it to deform, and in the use process, the piezoelectric vibrator will heat due to internal friction, resulting in a temperature difference between it and the external environment, and in the cooling process after heating and in the mechanical vibration process, deformation is easy to occur.

[0003] The deformation of the piezoelectric vibrator will form a very high potential difference on the two electrodes of the piezoelectric vibrator, and the formed excessive potential will damage the piezoelectric vibrator, so that the internal structure of the piezoelectric vibrator is electrically broken, resulting in that the piezoelectric vibrator cannot be normally used; when there is a higher potential at both ends of the piezoelectric vibrator, the circuit connected will also form a larger current when connected, thereby damaging the driving circuit; the instantaneous discharge will cause the piezoelectric vibrator to instantaneously deform greatly, thereby generating a large stress, and if this stress exceeds the maximum stress that the structure of the piezoelectric vibrator can bear, the piezoelectric vibrator will be broken.

[0004] Therefore, how to provide a piezoelectric vibrator not easy to be damaged in the production and use process has become a technical problem to be solved. CONTENT OF THE INVENTION

[0005] In view of the above problems, the present application provides a piezoelectric vibrator not easy to be damaged and electronic product, which is not easy to be damaged in the production and use process.

[0006] According to one aspect of the present application, a piezoelectric vibrator not easy to be damaged is provided, which comprises: a flexible plate provided with an insulating film and a resistor, the insulating film divides a first surface of the flexible plate into a first conductive area and a second conductive area which are not connected, the first conductive area and the second conductive area are of different electrical properties after being connected to an external power supply; a piezoelectric ceramic comprising a first piezoelectric area and a second piezoelectric area which are not connected, the first piezoelectric area is in contact with at least part of the first conductive area, and the second piezoelectric area is in contact with at least part of the second conductive area; and the resistor, one end of which is in contact with the first conductive area and the other end of which is in contact with the second conductive area.

[0007] Preferably, one end of the resistor is welded to the first conductive area, and the other end of the resistor is welded to the second conductive area.

[0008] Preferably, the resistance value of the resistor is not less than 500 ohms.

[0009] Preferably, the resistance value of the resistor is 100 kilo-ohms.

[0010] Preferably, the piezoelectric vibrator further comprises a buffer sheet, the buffer sheet is thermally bonded to the second surface of the flexible plate; the buffer sheet is a metal sheet or a glass sheet or a quartz sheet.

[0011] Preferably, the buffer sheet is a nickel-iron alloy, and the buffer sheet is the same size as the piezoelectric ceramic, and the buffer sheet is thermally bonded to the second surface of the flexible plate corresponding to the piezoelectric ceramic.

[0012] Preferably, the piezoelectric ceramic further has an insulating coating, the insulating coating is located between the first piezoelectric region and the second piezoelectric region; the first piezoelectric region is thermally bonded to the first conductive region, the second piezoelectric region is thermally bonded to the second conductive region, and the insulating coating is in contact with at least part of the insulating film; one surface of the piezoelectric ceramic close to the flexible plate is a spherical surface, the insulating coating is a circular ring, and the insulating coating divides the piezoelectric ceramic into a first piezoelectric region in the form of a spherical surface and a second piezoelectric region in the form of a circular ring.

[0013] Preferably, at least part of the first conductive region and at least part of the second conductive region are located outside the coverage range of the piezoelectric ceramic, and the resistor is arranged on the first surface of the flexible plate in the region outside the coverage range of the piezoelectric ceramic.

[0014] Preferably, the first conductive region and the second conductive region are both copper layers on the flexible plate.

[0015] According to another aspect of the embodiments of the present application, an electronic product is provided, the electronic product comprising the piezoelectric vibrator according to any one of the above embodiments.

[0016] The embodiments of the present application can short the first conductive region and the second conductive region of the flexible plate by arranging a resistor therebetween, can divide the voltage in the production process of the flexible plate by the resistor shorting, and can keep the normal use of the circuit of the flexible plate while dividing the voltage in the use process of the flexible plate. By dividing the voltage of the circuit of the flexible plate by the resistor, the problem that the piezoelectric ceramic, the flexible plate are broken due to the fact that the first piezoelectric region and the second piezoelectric region of the piezoelectric ceramic have high potentials after the piezoelectric ceramic is deformed can be avoided, and the problem that the piezoelectric vibrator is broken due to the fact that a large stress is generated by the discharge can be avoided, thereby reducing the probability of damage to the piezoelectric vibrator.

[0017] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art, upon reading the following detailed description of the preferred embodiment. The accompanying drawings are included to provide a better understanding of the preferred embodiment, and are not intended to be a limitation on the scope of the application. Moreover, in the drawings, like reference numerals refer to similar components, and:

[0019] Figure 1a An exploded view of a piezoelectric resonator is shown, according to an embodiment of the application;

[0020] Figure 1b A top view of a piezoelectric resonator is shown, according to an embodiment of the application;

[0021] Figure 1c A bottom view of a piezoelectric resonator is shown, according to an embodiment of the application;

[0022] Figure 1d A plan view of a first side of a flexible plate is shown, according to an embodiment of the application;

[0023] Figure 1e A plan view of a piezoelectric ceramic is shown, according to an embodiment of the application;

[0024] Figure 1f A plan view of a first side of a flexible plate is shown, according to another embodiment of the application;

[0025] Figure 1g A plan view of a piezoelectric ceramic is shown, according to another embodiment of the application;

[0026] Figure 2a An exploded view of a piezoelectric resonator is shown, according to another embodiment of the application;

[0027] Figure 2b A top view of a piezoelectric resonator is shown, according to another embodiment of the application;

[0028] Figure 2c A bottom view of a piezoelectric resonator is shown, according to another embodiment of the application;

[0029] Figure 2d A plan view of a first side of a flexible plate is shown, according to another embodiment of the application;

[0030] Figure 2e A plan view of a second side of a flexible plate is shown, according to another embodiment of the application;

[0031] Figure 2f A plan view of a piezoelectric ceramic is shown, according to another embodiment of the application;

[0032] Figure 3a An exploded view of a piezoelectric resonator is shown, according to yet another embodiment of the application;

[0033] Figure 3b A top view of a piezoelectric vibrator is shown according to an embodiment of the present application;

[0034] Figure 3c A bottom view of a piezoelectric vibrator is shown according to an embodiment of the present application;

[0035] Figure 3d A plan view of a first surface of a flexible plate is shown according to an embodiment of the present application;

[0036] Figure 3e A plan view of a piezoelectric ceramic is shown according to an embodiment of the present application;

[0037] Figure 4a An exploded view of a piezoelectric vibrator is shown according to an embodiment of the present application;

[0038] Figure 4b A top view of a piezoelectric vibrator is shown according to an embodiment of the present application;

[0039] Figure 4c A bottom view of a piezoelectric vibrator is shown according to an embodiment of the present application;

[0040] Figure 4d A plan view of a first surface of a flexible plate is shown according to an embodiment of the present application;

[0041] Figure 4e A plan view of a piezoelectric ceramic is shown according to an embodiment of the present application.

[0042] Reference signs in the detailed description of the embodiments are as follows:

[0043] 1. A piezoelectric vibrator;

[0044] 10. A piezoelectric ceramic; 11. A first piezoelectric region; 12. A second piezoelectric region; 13. An insulating coating layer;

[0045] 20. A flexible plate; 21. A first surface of the flexible plate; 22. A second surface of the flexible plate; 23. An insulating film; 24. A notch; 25. A resistor; 26. A first conductive region; 27. A second conductive region; 28. A first via hole;

[0046] 29. A second via hole;

[0047] 30. A buffer sheet. DETAILED DESCRIPTION

[0048] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0051] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists, A and B exist, and B exists. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0053] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] In the field of the present design, the piezoelectric vibrator is composed of three parts, which are piezoelectric ceramic, metal sheet and flexible printed circuit (FPC) providing power input and mechanical connection, that is, flexible board. The piezoelectric vibrator will deform during production and manufacturing process. The main reason for deformation is the change of temperature, and the external applied pressure forces it to deform. The piezoelectric vibrator will also heat due to internal friction during use, resulting in a temperature difference between it and the external environment. The deformation of the piezoelectric vibrator caused by temperature and external force will form a high potential on the two electrodes of the piezoelectric vibrator.

[0057] The present inventors initially short-circuit the metal sheet between the positive and negative electrodes of the flexible board to divide the voltage of the circuit formed after the flexible board is powered on by the metal sheet. However, this method can effectively protect the piezoelectric vibrator during production. After the piezoelectric vibrator is produced and sold, the metal sheet on the flexible board will cause short circuit of the flexible board circuit and cannot work normally. If the metal sheet is detachably connected to the flexible board, it is more troublesome for the user and the piezoelectric vibrator is not convenient to use.

[0058] Therefore, the present inventors replace the metal sheet with a resistance value of 0 with a resistor with a certain resistance value to divide the voltage of the circuit formed after the flexible board is powered on by the resistor, so as to avoid the piezoelectric ceramic pressed on the flexible board having a high potential. Moreover, connecting the resistor between the positive and negative electrodes of the flexible board can ensure that the resistor divides the voltage of the flexible board while ensuring the normal use of the flexible board.

[0059] Specifically, please refer to Figures 1a-1gIn the embodiments provided in the present application, the piezoelectric vibrator 1 comprises: a flexible plate 20 provided with an insulating film 23 and a resistor 25, the insulating film 23 divides a first surface 21 of the flexible plate into a first conductive area 26 and a second conductive area 27 which are not in communication, the first conductive area 26 and the second conductive area 27 are of different electrical properties after being connected to an external power source; a piezoelectric ceramic 10 comprising a first piezoelectric area 11 and a second piezoelectric area 12 which are not in communication, the first piezoelectric area 11 is in contact with at least part of the first conductive area 26, and the second piezoelectric area 12 is in contact with at least part of the second conductive area 27; and the resistor 25 is in contact with the first conductive area 26 at one end and in contact with the second conductive area 27 at the other end.

[0060] The piezoelectric vibrator 1 further comprises a buffer sheet 30 which is thermally bonded to the second surface 22 of the flexible plate.

[0061] The buffer sheet 30 can strengthen the vibration frequency or vibration amplitude when the piezoelectric vibrator 1 vibrates, and can also buffer the vibration stress and reduce the probability of the piezoelectric ceramic 10 being broken.

[0062] Preferably, the buffer sheet 30 is a metal sheet or a glass sheet or a quartz sheet, and specifically, the buffer sheet 30 is a nickel-iron alloy. The thermal expansion coefficient of the metal sheet or the glass sheet or the quartz sheet is relatively close to that of the piezoelectric ceramic 10, and in particular, the thermal expansion coefficient of the nickel-iron alloy is very close to that of the piezoelectric ceramic 10, which can maintain good thermal expansion synchronization with the piezoelectric ceramic 10 when the temperature changes, reduce stress and deformation caused by the difference in thermal expansion, and thus improve the connection stability and reliability of the internal structure of the piezoelectric vibrator 1, which helps to ensure the performance stability of the piezoelectric vibrator 1 in different temperature environments.

[0063] Further, a nickel-iron alloy sheet with the same size as the piezoelectric ceramic 10 can be selected as the buffer sheet 30, and the buffer sheet 30 is thermally bonded to the second surface 22 of the flexible plate corresponding to the piezoelectric ceramic 10, so as to further ensure the consistency of the deformation of the buffer sheet 30 and the piezoelectric ceramic 10, thereby buffering the deformation of the piezoelectric ceramic 10 by the piezoelectric ceramic 10, and improving the connection stability and reliability of the internal structure of the piezoelectric vibrator 1.

[0064] The resistor 25 is set as a high-resistance resistor to ensure the normal operation of the flexible plate 20 after being connected to the power source, and the resistance value of the high-resistance resistor 25 is greater than 500 ohms, and preferably, the resistance value of the resistor 25 is between 20 kilohms and 200 kilohms, so as to balance the discharge demand of the piezoelectric vibrator 1 and the demand for normal operation of the flexible plate 20, and specifically, the resistance value of the resistor 25 can be set to 100 kilohms.

[0065] One end of the resistor 25 is welded to the first conductive area 26, and the other end is welded to the second conductive area 27.

[0066] Please refer to Figure 1d andFigure 1e The electrical distribution of the flexible plate 20 after being energized is analyzed. In the figure, "+" indicates the presence of positive charge, and "-" indicates the presence of negative charge. Figure 1d The square pad (soldering pad) is the area on the first surface 21 of the flexible board that is outside the coverage of the piezoelectric ceramic 10. An external power supply can be connected to the square pad. Figure 1d The positive terminal of the external power supply is connected to the "+" mark in the square disk. Figure 1d The negative terminal of an external power source is connected to the "-" mark in the square disk. The charge flowing into the flexible plate 20 is blocked by the insulating film 23, forming a... Figure 1d The distribution shown, wherein, Figure 1d The charge flow path of the area covered by the first piezoelectric region 11 of the piezoelectric ceramic 10 on the flexible plate 20 is as follows: the charge of the first conductive region 26 in the square disk flows into the second surface 22 of the flexible plate through the first through hole 28, and the charge on the second surface 22 of the flexible plate flows into the area covered by the piezoelectric ceramic 10 on the first surface 21 of the flexible plate through the second through hole 29.

[0067] The piezoelectric ceramic 10 also has an insulating coating 13, which is located between the first piezoelectric region 11 and the second piezoelectric region 12. The first piezoelectric region 11 is thermally bonded to the first conductive region 26, and the second piezoelectric region 12 is thermally bonded to the second conductive region 27. The insulating coating 13 is in at least partial contact with the insulating film 23. The side of the piezoelectric ceramic 10 closest to the flexible plate 20 is circular, and the insulating coating 13 is annular. The insulating coating 13 divides the piezoelectric ceramic 10 into the circular first piezoelectric region 11 and the annular second piezoelectric region 12. Figure 1d and Figure 1e The first piezoelectric region 11 is in contact with the first conductive region 26, making the first piezoelectric region 11 positively charged. The second piezoelectric region 12 is in contact with the second conductive region 27, making the second piezoelectric region 12 negatively charged, so as to form polarized electric fields with opposite directions. When the piezoelectric oscillator 1 alternately expands and contracts (inverse piezoelectric effect), it generates synergistic mechanical vibration (such as bending vibration or shear vibration). Moreover, when the deformation directions of the first piezoelectric region 11 and the second piezoelectric region 12 are opposite (such as one elongating and the other shortening), the vibration amplitude of the overall structure will be significantly increased (similar to the double piezoelectric crystal effect), thereby improving the energy conversion efficiency and enhancing the vibration amplitude of the piezoelectric oscillator 1.

[0068] Figure 1e , Figure 2f , Figure 4e The second piezoelectric region 12 is in the form of a standard ring. Of course, in other embodiments, the ring-shaped second piezoelectric region 12 on the piezoelectric ceramic 10 can also be extended to form other shapes, for example... Figure 3eThe outer edge of the second piezoelectric region 12 extends to form a square, and the inner edge is still in the form of a circular ring.

[0069] The first conductive region 26 and the second conductive region 27 are both copper layers on the flexible plate 20, so as to have good conductive performance.

[0070] When the external power source is connected to the flexible plate 20, the positive and negative poles can also be reversely connected. Specifically, please refer to Figure 1f and Figure 1g to form an opposite charge distribution. Figure 1d and Figure 1e

[0071] The embodiments of the present application do not limit the specific shapes of the flexible plate 20, the first conductive region 26 and the second conductive region 27, which can be set according to the needs of use. For example, Figures 2a-2f In the embodiment, the positive and negative poles of the external power source are connected to the square plate on the first surface 21 of the flexible plate and the steering wheel on the second surface 22 of the flexible plate respectively. Figures 3a-3e In the embodiment, the positive and negative poles of the external power source are connected to the left and right sides of the square plate on the first surface 21 of the flexible plate respectively. Figures 4a-4e In the embodiment, the positive and negative poles of the external power source are connected to the left and right sides of the square plate on the first surface 21 of the flexible plate respectively.

[0072] The insulating film 23 is preferably a polyimide film. The insulating film 23 also has a notch 24, and the resistor 25 is clamped to the notch 24.

[0073] At least part of the first conductive region 26 and at least part of the second conductive region 27 are located outside the coverage of the piezoelectric ceramic 10. The resistor 25 is arranged on the first surface 21 of the flexible plate and located outside the coverage of the piezoelectric ceramic 10, so as to avoid that the resistor 25 is pressed between the flexible plate 20 and the piezoelectric ceramic 10, and the stability of the connection between the flexible plate 20 and the piezoelectric ceramic 10 is damaged.

[0074] The embodiments of the present application can divide the voltage through the resistor 25 short-circuiting between the first conductive region 26 and the second conductive region 27 of the flexible plate 20 during the production process of the flexible plate 20, and can keep the normal use of the circuit of the flexible plate 20 while dividing the voltage during the use process of the flexible plate 20. The voltage of the first piezoelectric region 11 and the second piezoelectric region 12 on the piezoelectric ceramic 10 is high after the piezoelectric ceramic 10 is deformed, which can avoid the problems that the piezoelectric ceramic 10 and the flexible plate 20 are broken, and can avoid the problem that the piezoelectric vibrator 1 is broken due to the large stress generated by the discharge, thereby reducing the probability that the piezoelectric vibrator 1 is damaged.

[0075] ​According to another aspect of the embodiments of the present application, an electronic product is also provided, which comprises the piezoelectric vibrator 1 according to any of the above embodiments.

[0076] The electronic product can be a piezoelectric brake, a piezoelectric air pump, a piezoelectric liquid pump, a piezoelectric micropump, or the like.

[0077] The resistor 25 in the electronic product can effectively protect the piezoelectric ceramic 10: by the voltage division effect of the large resistance resistor 25, the possibility of breakdown of the piezoelectric ceramic 10 due to the accumulation of voltage of the parasitic capacitance of the flexible plate 20 is reduced, and the electrical environment when the voltage suddenly changes is stabilized, preventing the piezoelectric ceramic 10 from breaking, and improving the stability and reliability of the piezoelectric ceramic 10 during the thermal bonding process; the resistor 25 can also ensure the normal operation of the electronic product: avoiding the chain reaction caused by the breakdown or fragmentation of the piezoelectric ceramic 10, ensuring that the electronic product connected thereto can work normally, which is of great significance in application fields such as medical devices, piezoelectric micropumps, and the like which have high requirements for precision and stability; the flexible plate 20 connected with the resistor 25 has little effect on the normal working state: in the circuit, the large resistor has the characteristics of achieving voltage division and stabilizing the electrical environment, while having little effect on the operation of the entire device in the normal working state, and will not interfere with the normal electrical performance of the device, ensuring the normal functioning of the overall function of the device; the way of connecting the flexible plate 20 with the resistor 25 is simple and feasible: this scheme can be realized by simply short-circuiting the resistor, without the need for complex circuit structures or high costs, and is easy to implement and promote.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A non-damageable piezoelectric vibrator characterized by comprising: The piezoelectric vibrator comprises: a flexible plate provided with an insulating film and a resistor, the insulating film dividing a first surface of the flexible plate into a first conductive area and a second conductive area which are not in communication, the first conductive area and the second conductive area being of different electrical properties after being connected to an external power source; a piezoelectric ceramic comprising a first piezoelectric area and a second piezoelectric area which are not in communication, the first piezoelectric area being in contact with at least part of the first conductive area, and the second piezoelectric area being in contact with at least part of the second conductive area; the resistor having one end in contact with the first conductive area and the other end in contact with the second conductive area.

2. The piezoelectric vibrator according to claim 1, characterized by The resistor has one end welded to the first conductive area and the other end welded to the second conductive area.

3. The piezoelectric resonator according to claim 1, wherein The resistance of the resistor is not less than 500 ohms.

4. The piezoelectric vibrator according to claim 3, characterized by The resistance of the resistor is 100 kilo-ohms.

5. The piezoelectric resonator according to claim 1, wherein The piezoelectric vibrator further comprises a buffer sheet which is thermally bonded to a second surface of the flexible plate; the buffer sheet is a metal sheet or a glass sheet or a quartz sheet.

6. The piezoelectric resonator according to claim 5, wherein The buffer sheet is a nickel-iron alloy, and the buffer sheet is the same size as the piezoelectric ceramic, and the buffer sheet is thermally bonded to the second surface of the flexible plate corresponding to the piezoelectric ceramic.

7. The piezoelectric resonator according to claim 5, wherein The piezoelectric ceramic further has an insulating coating between the first piezoelectric area and the second piezoelectric area; the first piezoelectric area is thermally bonded to the first conductive area, the second piezoelectric area is thermally bonded to the second conductive area, and the insulating coating is in contact with at least part of the insulating film; a surface of the piezoelectric ceramic close to the flexible plate is a circular surface, the insulating coating is in the form of a circular ring, and the insulating coating divides the piezoelectric ceramic into a first piezoelectric area in the form of a circular surface and a second piezoelectric area in the form of a circular ring.

8. The piezoelectric resonator according to claim 7, characterized by At least part of the first conductive area and at least part of the second conductive area are located outside the coverage range of the piezoelectric ceramic, and the resistor is arranged on the first surface of the flexible plate in a region outside the coverage range of the piezoelectric ceramic.

9. The piezoelectric resonator according to claim 1, wherein The first conductive area and the second conductive area are both copper-clad layers on the flexible plate.

10. An electronic product, characterized by comprising: The electronic product comprises the piezoelectric vibrator according to any one of claims 1 to 9.

Images