Piezoelectric vibrator and piezoelectric vibrator assembly

Abstract

The present invention provides a piezoelectric vibrator and a piezoelectric vibrator assembly. [Solution] The piezoelectric vibrator includes a piezoelectric body and an amplifying unit supported and fixed on at least one of the opposing sides of the piezoelectric body, the piezoelectric body is made of a material having a piezoelectric effect in a single layer or multiple layers, the amplifying unit is a flat structure having the same shape as the piezoelectric body and composed of an elastic reinforcing element, the elastic reinforcing element is a metal sheet, the piezoelectric body expands or contracts along a first direction parallel to the plane in which the piezoelectric body is located when receiving an external voltage, and the amplifying unit contracts or expands along a second direction, the first direction and the second direction being perpendicular to each other. Compared with the related art, the piezoelectric vibrator and piezoelectric vibrator assembly of the present invention have a small volume, a fast response, an adjustable resonance frequency, a wide operating frequency range, and a high energy conversion efficiency.

Description

[Technical Field]

[0001] The present invention relates to a piezoelectric vibrator, and more particularly to a piezoelectric vibrator and a piezoelectric vibrator assembly applied in the field of electronic products. [Background technology]

[0002] With the development of electronic products, piezoelectric vibrators can be used in a variety of applications, such as in mobile phones, tablets, laptops, automotive applications, touch pens, etc. as piezoelectric motors for tactile feedback; in addition, they are used as sound generating units in speakers, screen sound generation, bone conduction, and other basic electronic devices; and as pressure sensors, they can sense external pressure changes and convert them into voltage signals. Piezoelectric vibrators have become an important component of electronic products.

[0003] The piezoelectric motor of the haptic feedback, the sound generating unit of the speaker, and the pressure sensor of the prior art each have a configuration based on their own function.

[0004] However, the related art haptic feedback piezoelectric motors, speaker sound units, and pressure sensors each require a large number of devices in the entire machine, occupy a large volume, and require controller adjustment, resulting in slow response times for each device and a fixed, non-adjustable resonant frequency.

[0005] Therefore, it is necessary to provide a new piezoelectric vibrator to solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem to be solved by the present invention is to provide a piezoelectric vibrator and a piezoelectric vibrator assembly that have a small volume, a fast response, an adjustable resonance frequency, a wide operating frequency range, and a high energy conversion efficiency. [Means for solving the problem]

[0007] In order to solve the above technical problems, in a first aspect, the present invention provides a piezoelectric vibrator, the piezoelectric vibrator including a piezoelectric body and an amplification unit supported and fixed on at least one of the opposing sides of the piezoelectric body, the piezoelectric body being manufactured from a material having a single layer or multiple layers of piezoelectric effect, the amplification unit being a flat structure having the same shape as the piezoelectric body and composed of an elastic reinforcing element, the elastic reinforcing element being a metal sheet, the piezoelectric body expanding or contracting along a first direction parallel to the plane in which the piezoelectric body is located when subjected to an external voltage, and the amplification unit contracting or expanding along a second direction, the first direction and the second direction being perpendicular to each other.

[0008] Preferably, the piezoelectric body includes a plurality of stacked internal electrodes having different polarities, a plurality of stacked piezoelectric layers surrounding the outer peripheral edges of the internal electrodes and electrically connected to the internal electrodes, and an external electrode surrounding the outer peripheral edges of the piezoelectric layers and electrically connected to the piezoelectric layers, wherein the plurality of internal electrodes and the plurality of piezoelectric layers are all stacked along the second direction, and the plurality of piezoelectric layers are all manufactured from a single layer or multiple layers of piezoelectric ceramic.

[0009] Preferably, the piezoelectric body is elongated, rectangular or circular.

[0010] Preferably, the piezoelectric body is made of a multilayer piezoelectric ceramic poled along the first direction.

[0011] Preferably, the amplification unit includes a first segment fixed to the piezoelectric body, two second segments that are bent from opposite ends of the first segment and extend at an angle away from the piezoelectric body, two third segments that are bent from each of the two second segments in a direction away from the first segment and are spaced apart from the piezoelectric body, a fourth segment that is a mirror image of the first segment and is spaced apart from it, two fifth segments that extend outward from the fourth segment and are mirror images of the two second segments and are spaced apart from it, and two sixth segments that are attached to the two third segments and are mirror images of it, each of which is attached to a corresponding one of the sixth segments and forms a thickened end of the amplification unit together with the sixth segment, and the thickened end is supported and fixed to the piezoelectric body, and the first segment, the second segment, the fourth segment and the fifth segment together form the flat structure.

[0012] Preferably, the length of the thickened end portion along the first direction is equal to half the length of the flat structure along the first direction.

[0013] Preferably, the piezoelectric vibrator further includes a fixed end block, the thickened end being supported and connected to the piezoelectric body via the fixed end block, and the fixed end block being electrically insulated from the piezoelectric body.

[0014] Preferably, there are two amplification units, each located on opposite sides of the piezoelectric body, and there are at least two fixed end blocks, each of which is connected to the piezoelectric body via one of the fixed end blocks.

[0015] Preferably, the first segment is fixed at a central position of the piezoelectric body, the amplification unit has a symmetrical structure centered on the first segment, and the amplification factor of the piezoelectric vibrator is the ratio between the displacement amount of the piezoelectric body along the first direction and the displacement amount of the amplification unit along the second direction.

[0016] Preferably, the amplification unit is rectangular, square or circular.

[0017] Preferably, the amplification unit further includes a fixing portion extending from the thickened end and fixed to the edge of the piezoelectric body, and the thickened end is bent and extends obliquely from the flat structure toward the edge of the piezoelectric body.

[0018] Preferably, there is at least one amplification unit, the amplification unit being located on one side of the piezoelectric body, the other side of the piezoelectric body being connected to another amplification unit or to a mountable structure used for other buffer amplification.

[0019] Preferably, the amplifying unit further includes a bent portion that is bent and extends obliquely from the thickened end toward the edge of the piezoelectric body, and a fixed portion that is fixed to the edge of the piezoelectric body.

[0020] Preferably, there is at least one amplification unit, the amplification unit being located on one side of the piezoelectric body, the other side of the piezoelectric body being connected to another amplification unit or to a mountable structure used for other buffer amplification.

[0021] Preferably, there is at least one fixed end block, which is fixed to the outside of the piezoelectric body along the first direction, and the corresponding thickened ends of the two amplification units are fixed to opposite ends of the fixed end block along the second direction, respectively, and the piezoelectric vibrator further includes a connecting segment, which is made of the same metal as the amplification unit, and which is fixed to one side of the fixed end block away from the piezoelectric body along the first direction, and the third segment of the amplification unit is connected to the connecting segment.

[0022] Preferably, the piezoelectric vibrator further includes a buffer member, of which there are two, and the two buffer members are fixed to one side of the first segment away from the piezoelectric body and are spaced apart from the fourth segment.

[0023] Preferably, the cushioning member is made of a high molecular weight polymer.

[0024] Preferably, the piezoelectric vibrator further includes a connecting segment, which is made of the same metal as the amplifying unit, and which is fixed to the outside of the piezoelectric body along the first direction, and the corresponding third segments of the two amplifying units are each connected to the connecting segment.

[0025] Preferably, the piezoelectric vibrator further includes a buffer member, of which there are two, and the two buffer members are fixed to one side of the first segment away from the piezoelectric body and are spaced apart from the fourth segment.

[0026] Preferably, the cushioning member is made of a high molecular weight polymer.

[0027] Preferably, the corresponding sixth segments in the two amplification units each extend in a direction away from the first segment, and the opposing sides of the fixed end block along the second direction are interposed between the extending portions of the two sixth segments.

[0028] Preferably, the piezoelectric vibrator further includes a buffer member, of which there are two, and the two buffer members are fixed to one side of the first segment away from the piezoelectric body and are spaced apart from the fourth segment.

[0029] Preferably, the cushioning member is made of a high molecular weight polymer.

[0030] Preferably, there are three amplifying units, each of which is a first amplifying unit, a second amplifying unit, and a third amplifying unit; the three amplifying units are all located on the same side of the piezoelectric body and jointly form a three-layer elastic element structure; the first amplifying unit and the second amplifying unit are connected in parallel; the third segment of the first amplifying unit and the third segment of the second amplifying unit are all manufactured from the same metal sheet; the sixth segment of the first amplifying unit and the sixth segment of the second amplifying unit are all manufactured from the same metal sheet; the third amplifying unit is stacked on one side of the first amplifying unit and the second amplifying unit that is remote from the piezoelectric body; The first segment of the width unit, the sixth segment of the first amplification unit, and the sixth segment of the second amplification unit are all manufactured from the same metal sheet, the two second segments of the third amplification unit are the fifth segments extending from the sixth segment where the first amplification unit and the second amplification unit are connected to each other, the two third segments of the third amplification unit are the fourth segment of the first amplification unit and the fourth segment of the second amplification unit, respectively, and the two sixth segments of the third amplification unit are bonded and fixed to the fourth segment of the first amplification unit and the fourth segment of the second amplification unit, respectively.

[0031] Preferably, there are two amplifying units, and the two amplifying units are located on opposite sides of the piezoelectric body, respectively.

[0032] In a second aspect, the present invention further provides a piezoelectric vibrator assembly, the piezoelectric vibrator assembly including at least two of the piezoelectric vibrators, the two piezoelectric vibrators being stacked and fixed along the second direction, and the fourth segments of the adjacent amplification units of the two piezoelectric vibrators being bonded and fixed together. [Effects of the Invention]

[0033] Compared with the related art, the piezoelectric vibrator and piezoelectric vibrator assembly of the present invention has a piezoelectric body and an amplifying unit supported and fixed on at least one of the opposing sides of the piezoelectric body. The piezoelectric body is made of a material with a single or multiple layer piezoelectric effect. When the piezoelectric body is subjected to an external voltage, the piezoelectric body expands or contracts along a first direction parallel to the plane on which the piezoelectric body is located due to the inverse piezoelectric effect. At the same time, the amplifying unit is made of an elastic reinforcing element and has a flat structure with the same shape as the piezoelectric body. The elastic reinforcing element is made of a metal sheet, so that the amplifying unit is configured to contract or expand along a second direction, and the first direction and the second direction are perpendicular to each other. This structure solves the problem of the piezoelectric body having a small response displacement or a large applied voltage. As a result, the piezoelectric vibrator and piezoelectric vibrator assembly of the present invention have a small volume, a fast response, an adjustable resonance frequency, a wide operating frequency range, and high energy conversion efficiency. [Brief explanation of the drawings]

[0034] [Figure 1] 1 is a schematic perspective view showing the configuration of a piezoelectric vibrator according to Example 1 of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 3] 1 is a schematic diagram illustrating a configuration of a piezoelectric body of a piezoelectric vibrator according to Example 1 of the present invention. [Figure 4] 4A and 4B are schematic diagrams showing another configuration of the piezoelectric body of the piezoelectric vibrator according to the first embodiment of the present invention. [Figure 5] 3 is a schematic diagram illustrating the principle of the amplification factor of the piezoelectric vibrator according to the first embodiment of the present invention. FIG. [Figure 6] FIG. 4 is a schematic perspective view showing another configuration of the piezoelectric vibrator according to the first embodiment of the present invention. [Figure 7] FIG. 10 is a schematic perspective view showing the configuration of a piezoelectric vibrator according to Example 2 of the present invention. [Figure 8] FIG. 8 is a cross-sectional view taken along the line BB in FIG. [Figure 9] FIG. 10 is a schematic perspective view showing another configuration of the piezoelectric vibrator according to the second embodiment of the present invention. [Figure 10] FIG. 10 is a schematic perspective view showing the configuration of a piezoelectric vibrator according to a third embodiment of the present invention. [Figure 11] 11 is a cross-sectional view taken along the line CC in FIG. 10. [Figure 12] FIG. 10 is a schematic perspective view showing another configuration of the piezoelectric vibrator according to the third embodiment of the present invention. [Figure 13] FIG. 10 is a schematic perspective view showing the configuration of a piezoelectric vibrator according to Example 4 of the present invention. [Figure 14] FIG. 10 is a schematic perspective view showing the configuration of a piezoelectric vibrator according to a fifth embodiment of the present invention. [Figure 15] FIG. 10 is a schematic perspective view showing the configuration of a piezoelectric vibrator according to Example 6 of the present invention. [Figure 16] FIG. 10 is an exploded perspective view showing a partial configuration of a piezoelectric vibrator according to a seventh embodiment of the present invention. [Figure 17] FIG. 10 is a schematic diagram illustrating the configuration of a piezoelectric vibrator assembly according to Example 8 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0035] The present invention will be further described below with reference to the drawings and embodiments.

[0036] Example 1 A first embodiment of the present invention provides a piezoelectric vibrator 100 .

[0037] 1 and 2, the piezoelectric vibrator 100 specifically includes a piezoelectric body 1 and an amplification unit 2 supported and fixed to at least one of the opposing sides of the piezoelectric body 1. As shown in FIG.

[0038] In this first embodiment, the piezoelectric vibrator 100 further includes a fixed end block 3. The fixed end block 3 is used to support and connect the amplification unit 2 to the piezoelectric body 1.

[0039] The piezoelectric body 1 is made of a material with a single layer or multiple layers of piezoelectric effect.

[0040] As shown in Figure 3, specifically, the piezoelectric body 1 includes a plurality of stacked internal electrodes 11 of different polarities, a plurality of stacked piezoelectric layers 12 surrounding the outer periphery of the internal electrodes 11 and electrically connected to the internal electrodes 11, and an external electrode 13 surrounding the outer periphery of the piezoelectric layers 12 and electrically connected to the piezoelectric layers 12.

[0041] The first direction X is the length direction of the piezoelectric body 1. The first direction X is parallel to the plane in which the piezoelectric body 1 is located.

[0042] The plurality of internal electrodes 11 and the plurality of piezoelectric layers 12 are both stacked along the second direction Y. The internal electrodes 11 of different polarities are alternately arranged and connected to the corresponding external electrodes 13.

[0043] The second direction Y is the thickness direction of the piezoelectric body 1. The first direction X and the second direction Y are perpendicular to each other.

[0044] In this first embodiment, the piezoelectric body 1 is made of a single-layer or multi-layer piezoelectric ceramic. Preferably, each of the piezoelectric layers 12 is made of a single-layer or multi-layer lead zirconate titanate ceramic. The piezoelectric body 1 has a first expansion / contraction direction of 10 mm or less and a second expansion / contraction direction of 100 mm or less. The thickness of the piezoelectric body 1 can be optimized according to the application scenario and the number of layers of the lead zirconate titanate ceramic.

[0045] Of course, without being limited thereto, in another embodiment, the piezoelectric body 1 is made of a multilayer piezoelectric ceramic poled along the first direction X, as shown in FIG. 4. The displacement strain direction of the piezoelectric body 1 is aligned with the applied electric field direction, and employs the inverse piezoelectric effect in the d33 direction (piezoelectric longitudinal effect direction). In this operating mode, a biasing force must be applied to the piezo stack to prevent the piezoelectric body 1 from failing.

[0046] The piezoelectric body 1 has a rectangular or circular shape. In this embodiment, the piezoelectric body 1 has a rectangular shape. Of course, this is not limiting, and in another embodiment, the piezoelectric body 1A has a rectangular shape, as shown in FIG. 5.

[0047] The amplifying unit 2 has a rectangular, square or circular shape. In the present embodiment, the piezoelectric body 1 has a square shape, and the amplifying unit 2, different from the piezoelectric body 1, has a circular shape.

[0048] The amplification unit 2 is a flat structure 20 composed of an elastic reinforcing element and having the same shape as the piezoelectric body 1. The elastic reinforcing element is a metal sheet. Materials for the metal sheet include titanium, titanium alloys, stainless steel, copper, copper alloys, etc. The elastic reinforcing element may be press-molded, thereby reducing the manufacturing cost of the piezoelectric vibrator 100.

[0049] Specifically, the amplification unit 2 includes a first segment 21 fixed to the piezoelectric body 1, two second segments 22 bent from opposite ends of the first segment 21 and extending at an angle away from the piezoelectric body 1, two third segments 23 bent from each of the two second segments 22 in a direction away from the first segment 21 and spaced apart from the piezoelectric body 1, a fourth segment 24 that is a mirror image of the first segment 21 and spaced apart from it, two fifth segments 25 that extend outward from the fourth segment and are mirror image symmetrical to the two second segments 22 and spaced apart from it, and two sixth segments 26 that are respectively bonded to and mirror image symmetrical to the two third segments 23. Each of the third segments 23 is bonded to and fixed to a corresponding one of the sixth segments 26 and constitutes a thickened end portion 2A of the amplification unit 2 in cooperation with the sixth segment 26.

[0050] The thickened end portion 2A is supported and fixed to the piezoelectric body 1. In this embodiment 1, the thickened end portion 2A is supported and fixed to the piezoelectric body 1 via the fixed end block 3. The fixed end block 3 is provided so as to be electrically insulated from the piezoelectric body 1. In specific production and manufacturing, the fixed end block 3 is connected to both ends of the piezoelectric body 1 by a method such as bonding with an adhesive.

[0051] The first segment 21, the second segment 22, the fourth segment 24, and the fifth segment 25 together form the flat structure 20. The flat structure 20 is fixed to an end portion close to the outer edge of the piezoelectric body 1, thereby making full use of the mechanical deformation of the piezoelectric body 1. The amplifying unit 2 employs a triangular amplifying principle, and the amplifying unit 2 on one side of the piezoelectric body 1 employs two layers of the elastic reinforcing element to form a diamond-shaped amplifying unit structure, i.e., the flat structure 20.

[0052] The sixth segment 26 forms a platform and is used to connect a load that needs to be driven or a base for fixing. In the amplifier unit 2, the angle of the lower diamond cannot be too small and is generally larger than the angle of the upper diamond. The rigidity of the amplifier unit 2 cannot be too large to avoid excessively restricting the expansion and contraction displacement of the piezoelectric layer.

[0053] In this Example 1, the length of the thickened end portion 2A along the first direction X is equal to half the length of the flat structure 20 along the first direction X. With this structure, the flat structure 20 becomes a diamond-shaped amplified unit structure.

[0054] When the piezoelectric body 1 is subjected to an external voltage, the piezoelectric body 1 expands or contracts along a first direction X parallel to the plane of the piezoelectric body 1 (i.e., perpendicular to the electric field direction of the internal electrodes) due to the inverse piezoelectric effect. At the same time, the amplifier unit 2 expands or contracts along a second direction Y. The amplifier unit 2 not only converts the direction of motion from the first direction X to the second direction Y, but also amplifies the displacement of the piezoelectric body 1 along the first direction X, thereby resolving the problems of the piezoelectric body 1 having a small response displacement or a large applied voltage. The structural advantages include the use of the inverse piezoelectric effect of the piezoelectric material of the piezoelectric body 1, allowing the application of a biasing force without being affected by an electromagnetic environment. The piezoelectric material operates in an expansion / contraction mode, which significantly improves material reliability compared to a bending mode. As a result, the piezoelectric vibrator 100 of the present invention has a small volume, fast response, adjustable resonance frequency, a wide operating frequency range, and high energy conversion efficiency. Therefore, the piezoelectric vibrator 100 of the present invention can be used as a tactile feedback piezoelectric motor in many fields such as mobile phones, tablets, laptops, in-car devices, touch pens, etc. The piezoelectric vibrator 100 of the present invention can be used in basic electronic devices in application fields such as speaker sound units, screen sound generation, and bone conduction, and the piezoelectric vibrator 100 of the present invention can be used as a pressure sensor to sense changes in external pressure and convert them into voltage signals.

[0055] Preferably, there are two amplifying units 2. The two amplifying units 2 are located on opposite sides of the piezoelectric body 1. This configuration contributes to further improving the displacement amplification ratio of the piezoelectric vibrator 100 of the present invention.

[0056] In this embodiment, the first segment 21 is fixed to the center of the piezoelectric body 1. The amplification unit 2 has a symmetrical structure with respect to the first segment 21. This structure converts the horizontal displacement of the piezoelectric body 1 into the vertical displacement of the amplification unit 2. As shown in FIG. 6, the amplification factor of the piezoelectric vibrator 100 is the ratio of the displacement of the piezoelectric body 1 along the first direction X to the displacement of the amplification unit 2 along the second direction Y. When the displacement of the piezoelectric body 1 along the first direction X is Δx1 and the displacement of the amplification unit 2 along the second direction Y is Δx2, the amplification factor of the piezoelectric vibrator 100 satisfies the formula Δx2 / Δx1. Therefore, the amplification unit 2 can be constructed by combining two layers of metal brackets. The overall amplification factor is the overlap of the upper and lower parts of the diamond shape formed by the metal brackets, thereby further increasing the amplification factor. In a specific design, the amplification factor of the amplification unit 2 can be flexibly designed, and various design goals can be achieved by changing the opening angle and structure of the upper and lower metal brackets.

[0057] The fixed end block 3 is made of metal. The fixed end block 3 made of metal contributes to manufacturing and molding.

[0058] The fixed end blocks 3 are respectively connected to the piezoelectric body 1 and the amplification unit 2, and are located at the edges of the piezoelectric body 1. The amplification unit 2 is connected to the end edges of the piezoelectric body 1 to make full use of the deformation occurring in the piezoelectric body 1, and most preferably, the extending cross beams of the sixth segment 26 are parallel to the surface of the piezoelectric body 1 and are adhered or soldered to both ends of the piezoelectric body 1 via the thickened end portions 2A, to prevent relative slippage between the amplification structure and the piezoelectric layer.

[0059] In this first embodiment, there are at least two fixed end blocks 3. Each of the amplification units 2 is connected to the piezoelectric body 1 via one of the fixed end blocks 3.

[0060] Example 2 A second embodiment of the present invention provides a piezoelectric vibrator 200 .

[0061] The piezoelectric vibrator 200 according to the second embodiment of the present invention is basically the same as the piezoelectric vibrator 100 according to the first embodiment of the present invention, and the piezoelectric vibrator 200 according to the second embodiment of the present invention is distinguished from the piezoelectric vibrator 100 as follows.

[0062] 7 and 8, the amplifying unit 2a further includes a bent portion 2Ca that is bent and extends obliquely from the thickened end portion 2Aa toward the edge of the piezoelectric body 1a, and a fixed portion 2Ba that is fixed to the edge of the piezoelectric body 1a. The fixed portion 2Ba is provided so as to be electrically insulated from the piezoelectric body 1a.

[0063] This structure has the thickened end 2Aa acting as a parallel cross beam, the bent portion 2Ca provided at a predetermined angle downward from the thickened end 2Aa, and the fixing portion 2Ba further provided and fixed to the piezoelectric body 1a, thereby realizing the same function as the amplification unit 2 of the piezoelectric vibrator 100 of Example 1 of the present invention. Naturally, the amplification unit 2a has certain differences in mounting difficulty and performance compared to the amplification unit 2.

[0064] In contrast to the piezoelectric vibrator 100 of the first embodiment, the bent portion 2Ca and the fixed portion 2Ba in the second embodiment jointly constitute the fixed end block 3 of the piezoelectric vibrator 100 of the first embodiment.

[0065] In the piezoelectric vibrator 200 of Example 2 of the present invention, the amplification unit 2a is provided with the bent portion 2Ca and the fixed portion 2Ba, which are directly connected to the piezoelectric body 1a, so that it is not necessary to separately provide the structure of the fixed end block 3 of the piezoelectric vibrator 100 of Example 1, which simplifies the overall solution and contributes to the processing and manufacturing of the piezoelectric vibrator 200. The bent portion 2Ca added to the structure of the piezoelectric vibrator 200 of Example 2 of the present invention has a certain deformation, and its displacement amplification performance is inferior to that of the piezoelectric vibrator 100 of Example 1 of the present invention.

[0066] In this second embodiment, there is at least one amplifier unit 2a, and the amplifier unit 2a is located on one side of the piezoelectric body 1a, and the other side of the piezoelectric body 1a is used to provide a structure with the same shape as the piezoelectric body 1a. The other side of the piezoelectric body 1a is connected to another amplifier unit 2a or another mountable structure used for buffer amplification. That is, the structure provided on the other side of the piezoelectric body 1a can adopt other structures according to actual design needs. For example, the other amplifier unit 2a can adopt other mountable structures according to needs.

[0067] In another embodiment, as shown in FIG. 9, the piezoelectric body 1Aa has an elongated shape.

[0068] Example 3 A third embodiment of the present invention provides a piezoelectric vibrator 300 .

[0069] The piezoelectric vibrator 300 of the third embodiment of the present invention is basically the same as the piezoelectric vibrator 100 of the first embodiment of the present invention, and the piezoelectric vibrator 300 of the third embodiment of the present invention is distinguished from the piezoelectric vibrator 100 of the first embodiment as follows.

[0070] 10-11, the amplification unit 2b further includes a fixing portion 2Bb extending from the thickened end portion 2Ab and fixed to an edge of the piezoelectric body 1b. The thickened end portion 2Ab is bent and extends obliquely from the flat structure 20b toward the edge of the piezoelectric body 1b. The fixing portion 2Bb is provided so as to be electrically insulated from the piezoelectric body 1b.

[0071] In comparison with the piezoelectric vibrator 100 of the first embodiment, the fixed portion 2Bb of the third embodiment is the fixed end block 3 of the piezoelectric vibrator 100 of the first embodiment.

[0072] In the piezoelectric vibrator 300 of Example 3 of the present invention, the amplification unit 2b is provided with a fixed portion 2Bb directly connected to the piezoelectric body 1b, thereby eliminating the need to separately provide the structure of the fixed end block 3 of the piezoelectric vibrator 100 of Example 1, simplifying the overall solution and contributing to the processing and manufacturing of the piezoelectric vibrator 300. However, in this structure, the connection to the piezoelectric body 1b is made via an inclined cantilever, i.e., the inclined thickened end portion 2Ab, and the amplification factor of the entire amplification structure can be adjusted by changing the length of the inclined thickened end portion 2Ab. Furthermore, since the thickened end portion 2Ab has a certain degree of deformation as a cantilever, its displacement amplification performance is inferior to that of the piezoelectric vibrator 100 of Example 1 and the piezoelectric vibrator 200 of Example 2 of the present invention.

[0073] In this third embodiment, there is at least one amplifier unit 2b, and the amplifier unit 2b is located on one side of the piezoelectric body 1b, and the other side of the piezoelectric body 1a is used to provide a structure with the same shape as the piezoelectric body 1b. The other side of the piezoelectric body 1b is connected to another amplifier unit 2b or another mountable structure used for buffer amplification. That is, the structure provided on the other side of the piezoelectric body 1b can adopt a different structure according to actual design needs. For example, the other amplifier unit 2b can adopt a different mountable structure according to needs.

[0074] In another embodiment, as shown in FIG. 12, the piezoelectric body 1Ab has an elongated shape.

[0075] Example 4 A fourth embodiment of the present invention provides a piezoelectric vibrator 400 .

[0076] The piezoelectric vibrator 400 of the fourth embodiment of the present invention is basically the same as the piezoelectric vibrator 100 of the first embodiment of the present invention, and the piezoelectric vibrator 400 of the fourth embodiment of the present invention and the piezoelectric vibrator 100 of the first embodiment are distinguished as follows.

[0077] 13, there is at least one fixed-end block 3c. The fixed-end block 3c is fixed to the outer side of the piezoelectric body 1c in the first direction Xc. The corresponding thickened end portions 2Ac of the two amplifying units 2c are fixed to opposite sides of the fixed-end block 3c in the second direction Yc.

[0078] The piezoelectric vibrator 400 further includes a connection segment 4c. The connection segment 4c is made of the same metal as the amplification unit 2c. The connection segment 4c is fixed to one side of the fixed end block 3c that is away from the piezoelectric body 1c in the first direction Xc. The third segment 23c of the amplification unit 2c is connected to the connection segment 4c. The structure of the piezoelectric vibrator 400 is such that the fixed end blocks 3c on both sides of the piezoelectric body 1c are designed as a whole, and the third segment 23c of the amplification unit 2c can be molded integrally with the connection segment 4c, thereby improving the reliability of the piezoelectric vibrator 400.

[0079] The end of the piezoelectric vibrator 400 is designed so that the connecting segment 4c and one of the fixed end blocks 3c are integrated, thereby achieving a rigid body from top to bottom, and the outside of the piezoelectric vibrator 400 is welded to the third segment 23c via the connecting segment 4c, providing stronger support.

[0080] The piezoelectric body 1c and the fixed end block 3c are connected by a biasing force, and the piezoelectric body 1c is subjected to pressure only, without tension, which avoids the problem of insufficient strength of the connection by adhesive, or simply serves as an auxiliary positioning means, thereby improving the reliability of the piezoelectric vibrator 400.

[0081] In the structure of the piezoelectric vibrator 400, the two amplifying units 2c further form a complete elastic amplifying frame, and after the overall assembly is completed, the piezoelectric body 1c is positioned and energized, simplifying the overall assembly process and making the piezoelectric vibrator 400 easier to manufacture.

[0082] In order to improve the amplification factor of the amplifying unit 2c, the piezoelectric vibrator 400 of the fourth embodiment of the present invention is structurally the same as the piezoelectric vibrator 100 of the first embodiment of the present invention, but has two amplifying units 2c. The two amplifying units 2c are located on opposite sides of the piezoelectric body 1c, respectively.

[0083] In this fourth embodiment, the piezoelectric vibrator 400 further includes a buffer member 5c. There are two buffer members 5c. The two buffer members 5c are fixed to one side of the first segment 21c that is spaced apart from the piezoelectric body 1c and are provided at an interval from the fourth segment 24c.

[0084] The buffer material 5c is made of a high molecular weight polymer. Preferably, the buffer member 5c is made of a high molecular weight polymer such as foam or rubber. In the fourth embodiment, the buffer member 5c is made of foam. The buffer member 5c, which uses foam for its buffering effect, prevents the structure from collapsing. The buffer member 5c can be a position-regulating and buffering structure, and can prevent the piezoelectric vibrator 400 from being damaged by excessive pressure or from being rendered ineffective by excessive pressure, thereby improving the reliability of the piezoelectric vibrator 400.

[0085] Example 5 A fifth embodiment of the present invention provides a piezoelectric vibrator 500 .

[0086] The piezoelectric vibrator 500 of the fifth embodiment of the present invention is basically the same as the piezoelectric vibrator 100 of the first embodiment of the present invention, and the piezoelectric vibrator 500 of the fifth embodiment of the present invention is distinguished from the piezoelectric vibrator 100 of the first embodiment as follows.

[0087] 14, specifically, the piezoelectric vibrator 500 further includes a connection segment 4d. The connection segment 4d is made of the same metal as the amplification unit 2d. The connection segment 4d is fixed to the outside of the piezoelectric body 1d along the first direction Xd. The corresponding third segments 23d of the two amplification units 2d are each connected to the connection segment 4d.

[0088] There is at least one fixed end block 3d, and the fixed end block 3d is fixed to one side of the connection segment 4d that is spaced apart from the piezoelectric body 1d along the first direction Xd. The piezoelectric vibrator 500 is structured such that the fixed end block 3d is disposed on the outermost side between the piezoelectric body 1d and the amplification unit 2d.

[0089] The piezoelectric vibrator 500 achieves rigidity from top to bottom through a structural design in which the fixed end block 3d is welded to the end of the connecting segment 4d, and the inner side is welded to the third segment 23d via the connecting segment 4d, providing stronger support and thereby improving the reliability of the piezoelectric vibrator 500.

[0090] The piezoelectric body 1d and the fixed end block 3d are connected by a biasing force, and the piezoelectric body 1d is subjected to pressure only, without tension, so the problem of insufficient strength of the connection by adhesive is avoided, or it can simply be used as an auxiliary positioning means, thereby improving the reliability of the piezoelectric vibrator 500.

[0091] In the structure of the piezoelectric vibrator 500, the two amplifying units 2d further form a complete elastic amplifying frame, and after the overall assembly is completed, the piezoelectric body 1d can be positioned and energized, simplifying the overall assembly process and thereby making the piezoelectric vibrator 500 easier to manufacture.

[0092] In order to improve the amplification factor of the amplifying unit 2d, the piezoelectric vibrator 500 of the fifth embodiment of the present invention is structurally the same as the piezoelectric vibrator 100 of the first embodiment of the present invention, but has two amplifying units 2d, which are located on opposite sides of the piezoelectric body 1d.

[0093] In this fifth embodiment, the piezoelectric vibrator 100 further includes a buffer member 5d. There are two buffer members 5d. The two buffer members 5d are fixed to one side of the first segment 21d that is spaced apart from the piezoelectric body 1d, and are provided at an interval from the fourth segment 24d.

[0094] The buffer material 5d is made of a high molecular weight polymer. Preferably, the buffer member 5d is made of a high molecular weight polymer such as foam or rubber. In this embodiment 5, the buffer member 5d is made of foam. The buffer member 5d, which uses foam for its buffering function, prevents the structure from collapsing. The buffer member 5d can have a positioning and buffering structure, preventing the piezoelectric vibrator 500 from being damaged by excessive pressure or from being rendered ineffective by excessive pressure, thereby improving the reliability of the piezoelectric vibrator 500.

[0095] Example 6 A sixth embodiment of the present invention provides a piezoelectric vibrator 600 .

[0096] The piezoelectric vibrator 600 of the sixth embodiment of the present invention is basically the same as the piezoelectric vibrator 500 of the fifth embodiment of the present invention, and the piezoelectric vibrator 600 of the sixth embodiment of the present invention and the piezoelectric vibrator 500 of the fifth embodiment are distinguished as follows.

[0097] 15, specifically, the corresponding sixth segments 26f in the two amplifying units 2f each extend in a direction away from the first segment 21f, and both sides of the fixed end block 3f facing the second direction Yf are interposed between the extending portions of the two sixth segments 26f. In the structure of the piezoelectric vibrator 600, the amplifying units 2f and the fixed end block 3f are connected in a right-angle cladding mode.

[0098] The piezoelectric vibrator 600 achieves a rigid body from top to bottom by a structural design in which the fixed end block 3f is welded to the end of the connecting segment 4f. The inner side is welded to the third segment 23f via the connecting segment 4d, providing stronger support and thereby improving the reliability of the piezoelectric vibrator 600.

[0099] The piezoelectric body 1f and the fixed end block 3f are connected by a biasing force, and the piezoelectric body 1f is subjected to pressure only and not tension, which avoids the problem of insufficient strength of the connection by adhesive or simply serves as an auxiliary positioning means, thereby improving the reliability of the piezoelectric vibrator 600.

[0100] In the structure of the piezoelectric vibrator 600, the two amplifying units 2f further form a complete elastic amplifying frame, and after the overall assembly is completed, the piezoelectric body 1f can be positioned and energized, simplifying the overall assembly process and thereby making the piezoelectric vibrator 600 easier to manufacture.

[0101] In this sixth embodiment, the piezoelectric vibrator 600 further includes a buffer member 5f. There are two buffer members 5f. The two buffer members 5f are fixed to one side of the first segment 21f that is spaced apart from the piezoelectric body 1f and are provided at an interval from the fourth portion 24f.

[0102] The buffer material 5f is made of a high molecular weight polymer. Preferably, the buffer member 5f is made of a high molecular weight polymer such as foam or rubber. In this sixth embodiment, the buffer member 5f is made of foam. The buffer member 5f, which uses foam for its buffering effect, prevents the structure from collapsing. The buffer member 5f can be a position-regulating and buffering structure, preventing the piezoelectric vibrator 600 from being damaged by excessive pressure or from being rendered ineffective by excessive pressure, thereby improving the reliability of the piezoelectric vibrator 600.

[0103] Example 7 A seventh embodiment of the present invention provides a piezoelectric vibrator 700 .

[0104] The piezoelectric vibrator 700 of the seventh embodiment of the present invention is basically the same as the piezoelectric vibrator 100 of the first embodiment of the present invention, and the piezoelectric vibrator 700 of the seventh embodiment of the present invention and the piezoelectric vibrator 100 of the first embodiment are distinguished as follows.

[0105] As shown in FIG. 16, specifically, there are three amplifying units 2h, which are a first amplifying unit 201h, a second amplifying unit 202h, and a third amplifying unit 203h, and the three amplifying units 2h are all located on the same side of the piezoelectric body 1h and jointly form a three-layer elastic element structure, the first amplifying unit 201h and the second amplifying unit 202h are connected in parallel, the third segment 23h1 of the first amplifying unit 201h and the third segment 23h2 of the second amplifying unit 202h are all manufactured from the same metal sheet, the sixth segment 26h1 of the first amplifying unit 201h and the sixth segment 26h2 of the second amplifying unit 202h are all manufactured from the same metal sheet, the third amplifying unit 203h is stacked on one side of the first amplifying unit 201h and the second amplifying unit 202h that is remote from the piezoelectric body 1h, and ... third amplifying unit 202h that is remote from the piezoelectric body 1h, and the third amplifying unit 203h is stacked on one side of the third amplifying unit 202h that is remote from The first segment 21h3 of the third amplifier unit 203h, the sixth segment 26h1 of the first amplifier unit 201h, and the sixth segment 26h2 of the second amplifier unit 202h are all manufactured from the same metal sheet, the two second segments 22h3 of the third amplifier unit 203h are the fifth segment 25h1 extending from the sixth segment 26h1 connected to the first amplifier unit 201h and the second amplifier unit 202h, respectively, the two third segments 23h3 of the third amplifier unit 203h are the fourth segment 24h1 of the first amplifier unit 201h and the fourth segment 24h2 of the second amplifier unit 202h, respectively, and the two sixth segments 26h3 of the third amplifier unit 203h are attached and fixed to the fourth segment 24h1 of the first amplifier unit 201h and the fourth segment 24h2 of the second amplifier unit 202h, respectively. The amplifier unit 2h of the entire structure of the piezoelectric vibrator 700 adopts a three-layer elastic element structure design to further improve the displacement amplification factor. The three-layer elastic element structure is based on the parallel distribution of two layers of diamond-shaped amplifier structures in the same piezoelectric body 1h, and a third layer of the elastic reinforcing element can be placed on top of them, thereby forming a multi-layer amplifier structure.In the three-layer elastic element structure, a larger displacement amplification factor is provided, which is the sum of the amplification factors of the three layers of the elastic reinforcing elements.

[0106] In the seventh embodiment, the three-layer elastic element structure can be designed as a single piece and assembled using biasing force without adhesive.

[0107] In order to improve the amplification factor of the amplification unit 2h, the piezoelectric vibrator 700 of Example 7 of the present invention is structurally the same as the piezoelectric vibrator 100 of Example 1 of the present invention, and there are two amplification units 2h, and the two amplification units 2h are respectively located on opposite sides of the piezoelectric body 1h.

[0108] Example 8 An eighth embodiment of the present invention provides a piezoelectric vibrator assembly 800 .

[0109] The piezoelectric vibrator assembly 800 includes at least one of two of the piezoelectric vibrators 100, two of the piezoelectric vibrators 200, two of the piezoelectric vibrators 300, two of the piezoelectric vibrators 400, two of the piezoelectric vibrators 500, two of the piezoelectric vibrators 600, and two of the piezoelectric vibrators 700. The advantage of the piezoelectric vibrator assembly 800 is that it improves the strength of the piezoelectric motor.

[0110] 17, in the eighth embodiment, the piezoelectric vibrator assembly 800 includes at least two of the piezoelectric vibrators 100. The two piezoelectric vibrators 100 are stacked and fixed along the second direction Yg. The fourth segments 24g of the adjacent amplification units 2g of the two piezoelectric vibrators 100 are bonded and fixed together.

[0111] When the two piezoelectric vibrators 100 are superimposed, the piezoelectric displacement can be amplified to the maximum, and the overall amplification factor is the product of the amplification factors of both.

[0112] When the two piezoelectric vibrators 100 are stacked, the amplification unit 2g may be welded or glued to the middle portion.

[0113] Compared with the related art, the piezoelectric vibrator and piezoelectric vibrator assembly of the present invention comprises a piezoelectric body and an amplifying unit supported and fixed on at least one of the opposing sides of the piezoelectric body, the piezoelectric body being made of a material with a single or multiple layer piezoelectric effect, and when the piezoelectric body is subjected to an external voltage, the piezoelectric body expands or contracts along a first direction parallel to the plane on which the piezoelectric body is located due to the inverse piezoelectric effect, and the amplifying unit is composed of an elastic reinforcing element and has a flat structure with the same shape as the piezoelectric body, and the elastic reinforcing element is a metal sheet, so that the amplifying unit contracts or expands along a second direction, the first direction and the second direction being perpendicular to each other, and this structure solves the problem of the piezoelectric body having a small response displacement or a large applied voltage, and as a result, the piezoelectric vibrator and piezoelectric vibrator assembly of the present invention have a small volume, a fast response, an adjustable resonance frequency, a wide operating frequency range, and high energy conversion efficiency.

[0114] The above are only examples of the present invention and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent flow transformation made by using the contents of the specification and drawings of the present invention, or any direct or indirect application to other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A piezoelectric vibrator, a piezoelectric body; and an amplification unit supported and fixed to at least one of opposing sides of the piezoelectric body; The piezoelectric body is made of a single layer or multiple layers of a material having a piezoelectric effect; The amplifying unit is composed of an elastic reinforcing element and has a thickened end and a flat structure, and the elastic reinforcing element is a metal sheet; When the piezoelectric body receives an external voltage, the piezoelectric body expands or contracts along a first direction parallel to a plane on which the piezoelectric body is located, and the amplifying unit contracts or expands along a second direction, the first direction and the second direction being perpendicular to each other; the amplification unit includes a first segment fixed to the piezoelectric body; two second segments each bent from opposite ends of the first segment and extending at an angle away from the piezoelectric body; two third segments each bent from the two second segments in a direction away from the first segment and spaced apart from the piezoelectric body; a fourth segment that is a mirror image of the first segment and spaced apart; two fifth segments that each extend outward from the fourth segment and are mirror images of the two second segments and spaced apart; and two sixth segments that are bonded to two of the third segments and are mirror images of the second segments, each sixth segment being bonded to a corresponding sixth segment and constituting the thickened end portion together with the sixth segment, the thickened end portion being supported and fixed to the piezoelectric body, and the first segment, the second segment, the fourth segment, and the fifth segment constituting the flat structure together.

2. 2. The piezoelectric vibrator of claim 1, wherein the piezoelectric body includes a plurality of stacked internal electrodes having different polarities, a plurality of stacked piezoelectric layers surrounding the outer peripheries of the internal electrodes and electrically connected to the internal electrodes, and an external electrode surrounding the outer peripheries of the piezoelectric layers and electrically connected to the piezoelectric layers, wherein the plurality of internal electrodes and the plurality of piezoelectric layers are all stacked along the second direction, and the plurality of piezoelectric layers are all manufactured from a single layer or multiple layers of piezoelectric ceramics.

3. 2. The piezoelectric vibrator according to claim 1, wherein the piezoelectric body has a rectangular, square or circular shape.

4. The piezoelectric vibrator of claim 1 , wherein the piezoelectric body is made of a multilayer piezoelectric ceramic that is polarized along the first direction.

5. 2. The piezoelectric vibrator according to claim 1, wherein the length of the thickened end portion along the first direction is equal to half the length of the flat structure along the first direction.

6. The piezoelectric vibrator according to claim 1, further comprising a fixed end block, the thickened end being supported and connected to the piezoelectric body via the fixed end block, and the fixed end block being electrically insulated from the piezoelectric body.

7. The piezoelectric vibrator of claim 6, characterized in that there are two amplification units, each located on opposite sides of the piezoelectric body, there are at least two fixed end blocks, and each amplification unit is connected to the piezoelectric body via one of the fixed end blocks.

8. 2. The piezoelectric vibrator of claim 1, wherein the first segment is fixed at a central position of the piezoelectric body, the amplification unit has a symmetrical structure centered on the first segment, and the amplification factor of the piezoelectric vibrator is the ratio of the displacement amount of the piezoelectric body along the first direction to the displacement amount of the amplification unit along the second direction.

9. 2. The piezoelectric vibrator according to claim 1, wherein the amplifying unit has a rectangular, square or circular shape.

10. The piezoelectric vibrator of claim 1, wherein the amplification unit further includes a fixing portion extending from the thickened end and fixed to the edge of the piezoelectric body, and the thickened end is bent and extends obliquely from the flat structure toward the edge of the piezoelectric body.

11. 11. The piezoelectric vibrator according to claim 10, wherein there is at least one amplification unit, the amplification unit being located on one side of the piezoelectric body, and the other side of the piezoelectric body being connected to another amplification unit.

12. 2. The piezoelectric vibrator according to claim 1, wherein the amplification unit further includes a bent portion that is bent and extends obliquely from the thickened end toward the edge of the piezoelectric body, and a fixed portion that is fixed to the edge of the piezoelectric body.

13. 13. The piezoelectric vibrator according to claim 12, wherein there is at least one amplification unit, the amplification unit being located on one side of the piezoelectric body, and the other side of the piezoelectric body being connected to another amplification unit.

14. There is at least one fixed end block, and the fixed end block is fixed to the outer side of the piezoelectric body along the first direction, and the corresponding thickened end portions of the two amplifying units are fixed to opposite ends of the fixed end block along the second direction, The piezoelectric vibrator further includes a connecting segment, the connecting segment being made of the same metal as the amplifying unit, the connecting segment being fixed to one side of the fixed end block that is away from the piezoelectric body along the first direction, and the third segment of the amplifying unit 8. The piezoelectric vibrator of claim 7, wherein the connecting segment is connected to the connecting segment.

15. The piezoelectric vibrator of claim 14, further comprising a buffer member, the buffer member being of two types, the two buffer members being fixed to one side of the first segment away from the piezoelectric body and being spaced apart from the fourth segment.

16. 16. The piezoelectric vibrator of claim 15, wherein the buffer member is made of a polymer.

17. The piezoelectric vibrator of claim 7, further comprising a connecting segment, the connecting segment being made of the same metal as the amplifying unit, the connecting segment being fixed to the outside of the piezoelectric body along the first direction, and the corresponding third segments of the two amplifying units being each connected to the connecting segment.

18. The piezoelectric vibrator of claim 17, further comprising a buffer member, the buffer members being two in number, the two buffer members being fixed to one side of the first segment away from the piezoelectric body and spaced apart from the fourth segment.

19. 20. The piezoelectric vibrator of claim 18, wherein the buffer member is made of a polymer.

20. The piezoelectric vibrator of claim 17, characterized in that the corresponding sixth segments in the two amplifying units each extend in a direction away from the first segment, and the opposing sides of the fixed end block along the second direction are interposed between the extending portions of the two sixth segments.

21. The piezoelectric vibrator of claim 20, further comprising a buffer member, the buffer members being two in number, the two buffer members being fixed to one side of the first segment away from the piezoelectric body and spaced apart from the fourth segment.

22. 22. The piezoelectric vibrator of claim 21, wherein the buffer member is made of a polymer.

23. A piezoelectric vibrator, a piezoelectric body; and an amplification unit supported and fixed to at least one of opposing sides of the piezoelectric body; The piezoelectric body is made of a single layer or multiple layers of a material having a piezoelectric effect; The amplifying unit is composed of an elastic reinforcing element and has a thickened end and a flat structure, and the elastic reinforcing element is a metal sheet; When the piezoelectric body receives an external voltage, the piezoelectric body expands or contracts along a first direction parallel to a plane on which the piezoelectric body is located, and the amplifying unit contracts or expands along a second direction, the first direction and the second direction being perpendicular to each other; The amplifying unit includes a first amplifying unit, a second amplifying unit and a third amplifying unit, the first amplifying unit, the second amplifying unit and the third amplifying unit are all located on the same side of the piezoelectric body and together form a three-layer elastic element structure, and the first amplifying unit the unit and the second amplifying unit are connected in parallel, and the third amplifying unit is stacked on one side of the first amplifying unit and the second amplifying unit that is spaced apart from the piezoelectric body; each of the first amplifying unit and the second amplifying unit includes a first segment fixed to the piezoelectric body, and the third amplifying unit includes a first segment provided at a distance from the piezoelectric body; and each of the first amplifying unit, the second amplifying unit, and the third amplifying unit further includes two second segments bent from opposite ends of the respective first segments and extending at an angle away from the piezoelectric body, two third segments bent from each of the two second segments in a direction away from the first segment and spaced apart from the piezoelectric body, a fourth segment that is a mirror image of the first segment and spaced apart from it, two fifth segments that extend outward from each of the fourth segments and are mirror image symmetrical to the two second segments and spaced apart from it, and two sixth segments that are bonded to each of the two third segments and are mirror image symmetrical to it, In each of the first amplification unit, the second amplification unit, and the third amplification unit, each of the third segments is bonded and fixed to a corresponding one of the sixth segments and constitutes the thickened end portion together with the sixth segment, and the first segment, the second segment, the fourth segment, and the fifth segment constitute the flat structure together, thickened ends of the first amplifying unit and the second amplifying unit that are away from the third amplifying unit are supported and fixed to the piezoelectric body; a piezoelectric vibrator, characterized in that the third segment of the first amplification unit and the third segment of the second amplification unit are all manufactured from the same metal sheet, the sixth segment of the first amplification unit and the sixth segment of the second amplification unit are all manufactured from the same metal sheet, the first segment of the third amplification unit, the sixth segment of the first amplification unit and the sixth segment of the second amplification unit are all manufactured from the same metal sheet, the two second segments of the third amplification unit are each the fifth segment extending from the sixth segment where the first amplification unit and the second amplification unit are connected to each other, the two third segments of the third amplification unit are the fourth segment of the first amplification unit and the fourth segment of the second amplification unit, respectively, and the two sixth segments of the third amplification unit are bonded and fixed to the fourth segment of the first amplification unit and the fourth segment of the second amplification unit, respectively.

24. 24. The piezoelectric vibrator according to claim 23, wherein there are two amplifying units, and the two amplifying units are located on opposite sides of the piezoelectric body, respectively.

25. 1. A piezoelectric vibrator assembly comprising: A piezoelectric vibrator assembly comprising at least two piezoelectric vibrators according to claim 7, wherein the two piezoelectric vibrators are stacked and fixed along the second direction, and the fourth segments of the adjacent amplification units of the two piezoelectric vibrators are bonded together and fixed.

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