Piezoelectric pressing structure and tactile feedback device

Abstract

The utility model discloses a piezoelectric pressing structure and a tactile feedback device, and relates to the technical field of tactile feedback. Wherein the piezoelectric pressing structure comprises a piezoelectric ceramic piece, an elastic supporting piece and a supporting piece, the elastic supporting piece comprises two fixed end parts and a deformation section arranged between the two fixed end parts, the two fixed end parts are fixedly connected to the two ends of one surface of the piezoelectric ceramic piece, and the deformation section and the piezoelectric ceramic piece are arranged at an interval; the supporting piece is arranged between the deformation section and the piezoelectric ceramic piece, and the surface, facing the piezoelectric ceramic piece, of the supporting piece is a plane; the deformation section is used for moving towards the piezoelectric ceramic piece when being pressed, so that the two fixed end parts move back to back to stretch the piezoelectric ceramic piece. According to the technical scheme, the piezoelectric ceramic piece can be prevented from being broken when pressed, and the reliability of the piezoelectric ceramic piece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tactile feedback, and in particular to a piezoelectric pressing structure and a tactile feedback device. Background Art

[0002] Haptic feedback technology recreates the sensation of touch for users through a series of actions, including force and vibration. To provide users with a more realistic user experience, haptic feedback technology is being widely adopted in electronic products, automobiles, and mechanical equipment. Piezoelectric ceramic pressing structures are also increasingly being used in haptic feedback devices.

[0003] In the related art, when the piezoelectric pressing structure is pressed, the piezoelectric ceramic piece is easily broken and has poor reliability. Utility Model Content

[0004] The main purpose of the utility model is to provide a piezoelectric pressing structure, aiming to improve the reliability of the piezoelectric ceramic piece when pressed.

[0005] To achieve the above objectives, the piezoelectric pressing structure proposed in the present invention includes:

[0006] Piezoelectric ceramics;

[0007] an elastic support sheet, comprising two fixed ends and a deformation section disposed between the two fixed ends, the two fixed ends being fixedly connected to two ends of one surface of the piezoelectric ceramic sheet, and the deformation section being spaced apart from the piezoelectric ceramic sheet; and

[0008] A support member is provided between the deformation section and the piezoelectric ceramic sheet, wherein a surface of the support member facing the piezoelectric ceramic sheet is a plane;

[0009] The deformation section is configured to move toward the piezoelectric ceramic sheet when pressed, so that the two fixed ends move in opposite directions to stretch the piezoelectric ceramic sheet.

[0010] In one embodiment of the present application, the deformation section includes two connecting arms and a pressing portion provided between the two connecting arms, the pressing portion is spaced apart and arranged opposite to the piezoelectric ceramic sheet, and the two connecting arms respectively connect opposite ends of the pressing portion and the two fixed ends;

[0011] The supporting member is arranged between the pressing portion and the piezoelectric ceramic sheet.

[0012] In one embodiment of the present application, the support member is provided on a surface of the pressing portion facing the piezoelectric ceramic sheet.

[0013] In one embodiment of the present application, the support member and the pressing portion are an integrated structure.

[0014] In one embodiment of the present application, the pressing portion is protruded toward the piezoelectric ceramic sheet to form the supporting member;

[0015] Alternatively, the support member includes two support portions, and the two support portions are formed by bending two side edges of the pressing portion toward opposite sides.

[0016] In one embodiment of the present application, the support member is bonded or welded to a surface of the pressing portion facing the piezoelectric ceramic sheet.

[0017] In one embodiment of the present application, a distance D between the support member and the piezoelectric ceramic sheet satisfies: 0.05 mm ≤ D ≤ 10 mm.

[0018] In one embodiment of the present application, the support member is provided on a surface of the piezoelectric ceramic sheet facing the deformation section.

[0019] In one embodiment of the present application, the support member is a square block structure, the length L of the support member satisfies: 0.5mm≤L≤50mm, the width W of the support member satisfies: 0.5mm≤L≤50mm, and the height H of the support member satisfies: 0.05mm≤H≤20mm.

[0020] In one embodiment of the present application, the piezoelectric pressing structure includes two elastic support sheets, which are respectively arranged on two opposite surfaces of the piezoelectric ceramic sheet, and the support member is provided between each deformation segment and the piezoelectric ceramic sheet.

[0021] To achieve the above objectives, the present application also provides a tactile feedback device, including the above-mentioned piezoelectric pressing structure.

[0022] In the piezoelectric pressing structure of the present invention, an elastic support plate includes two fixed ends and a deformable section disposed between the two fixed ends. The two fixed ends are fixedly connected to the two ends of a surface of the piezoelectric ceramic plate. The deformable section is spaced apart from the piezoelectric ceramic plate. When the deformable section is pressed toward the piezoelectric ceramic plate, it squeezes the two fixed ends to move in opposite directions, causing the piezoelectric ceramic plate to be stretched and generate a corresponding electrical signal, thereby realizing the function of converting mechanical energy into electrical energy. By providing a support member between the deformable section and the piezoelectric ceramic plate, the distance the deformable section moves when pressed is reduced, thereby reducing the distance the two fixed ends move in opposite directions, thereby reducing the tensile force on the piezoelectric ceramic plate and preventing the piezoelectric ceramic plate from breaking. At the same time, the surface of the support member facing the piezoelectric ceramic plate is flat. When the deformable section is pressed, the support member can form surface contact with the piezoelectric ceramic plate, preventing the piezoelectric ceramic plate from being deformed and fractured due to excessive local stress in the piezoelectric ceramic plate, thereby further improving the reliability of the piezoelectric ceramic plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of an embodiment of the piezoelectric pressing structure of the utility model;

[0025] Figure 2 for Figure 1 A schematic structural diagram of the elastic support sheet in the embodiment;

[0026] Figure 3 This is a structural diagram of another embodiment of the piezoelectric pressing structure of the present utility model;

[0027] Figure 4 for Figure 3 A schematic structural diagram of the elastic support sheet in the embodiment;

[0028] Figure 5 This is a structural diagram of another embodiment of the piezoelectric pressing structure of the utility model;

[0029] Figure 6 This is a structural diagram of another embodiment of the piezoelectric pressing structure of the present utility model;

[0030] Figure 7 It is a structural schematic diagram of the support member in an embodiment of the present utility model.

[0031] Description of Figure Numbers:

[0032] Label name Label name 100 Piezoelectric ceramic sheets 221 Connecting arm 200 Elastic support sheet 222 Pressing part 210 Fixed end 300 Support 220 Deformation segment

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] In the related art, the piezoelectric pressing structure includes a piezoelectric ceramic sheet and an elastic support sheet arranged on the piezoelectric ceramic sheet. When the elastic support sheet is pressed, the piezoelectric ceramic sheet will be stretched. When the elastic support sheet is pressed too much, the stretching force on the piezoelectric ceramic sheet is also too large, which can easily lead to the piezoelectric ceramic sheet breaking and unreliability.

[0039] Based on this, the present invention proposes a piezoelectric pressing structure. This structure aims to reduce the distance between the elastic support sheet and the piezoelectric ceramic sheet to reduce the amplitude of the compression applied to the elastic support sheet, thereby reducing the tensile force on the piezoelectric ceramic sheet and preventing the piezoelectric ceramic sheet from breaking. The piezoelectric pressing structure is described below using an example embodiment.

[0040] In one embodiment of the present application, Figure 1 、 Figure 3 、 Figure 5 as well as Figure 6 As shown, the piezoelectric pressing structure includes a piezoelectric ceramic sheet 100 , an elastic supporting sheet 200 and a supporting member 300 .

[0041] The elastic support sheet 200 includes two fixed end portions 210 and a deformable section 220 disposed between the two fixed end portions 210. The two fixed end portions 210 are fixedly connected to the two ends of one surface of the piezoelectric ceramic sheet 100, and the deformable section 220 is spaced apart from the piezoelectric ceramic sheet 100. The support member 300 is disposed between the deformable section 220 and the piezoelectric ceramic sheet 100, and the surface of the support member 300 facing the piezoelectric ceramic sheet 100 is flat. The deformable section 220 is configured to move toward the piezoelectric ceramic sheet 100 when pressed, so that the two fixed end portions 210 move in opposite directions to stretch the piezoelectric ceramic sheet 100.

[0042] The piezoelectric ceramic sheet 100 in this embodiment can be configured as a single-layer or multi-layer piezoelectric ceramic sheet. When configured as a multi-layer structure, the piezoelectric ceramic sheet 100 can be thinned and the driving voltage reduced while still meeting performance requirements while reducing product size. The piezoelectric ceramic sheet 100 can generate a corresponding electrical signal when subjected to tensile deformation, converting mechanical energy into electrical energy. Alternatively, it can deform, such as contracting or expanding, when a corresponding voltage is applied, converting electrical energy into mechanical energy. When the piezoelectric ceramic sheet 100 changes shape due to an applied voltage signal, such as contracting or expanding horizontally, the two fixed ends 210 fixedly connected to the piezoelectric ceramic sheet 100 move toward or away from each other, thereby causing the deformable segment 220 to move vertically. This converts the change in length of the piezoelectric ceramic sheet 100 into vertical movement of the deformable segment 220, thereby amplifying the vibration signal and achieving tactile feedback.

[0043] When the deformable section 220 is pressed, the deformable section 220 moves toward the piezoelectric ceramic sheet 100 to press the two fixed end portions 210 to move in opposite directions, thereby stretching the piezoelectric ceramic sheet 100 toward both ends. If the distance the deformable segment 220 is pressed is greater, the distance the two fixed ends 210 move toward each other is longer, and the length of the piezoelectric ceramic sheet 100 stretched will also be longer, and the piezoelectric ceramic sheet 100 may break. To this end, this embodiment provides a support member 300 between the deformable segment 220 and the piezoelectric ceramic sheet 100. The support member 300 can shorten the distance between the deformable segment 220 and the piezoelectric ceramic sheet 100, so that when the deformable segment 220 is pressed with the same pressing force, the movable distance of the deformable segment 220 in this embodiment is smaller than that in the solution without the support member 300, thereby reducing the distance the two fixed ends 210 move toward each other, and reducing the tensile force on the piezoelectric ceramic sheet 100. This can prevent the piezoelectric ceramic sheet 100 from breaking, thereby improving the reliability of the piezoelectric ceramic sheet 100.

[0044] In addition, the surface of the support member 300 of this embodiment facing the piezoelectric ceramic sheet 100 is flat. Therefore, when the deformation section 220 is pressed until the support member 300 and the piezoelectric ceramic sheet 100 are squeezed, the support member 300 can form surface contact with the piezoelectric ceramic sheet 100, thereby increasing the force-bearing area of ​​the piezoelectric ceramic sheet 100. In this way, the deformation and fracture of the piezoelectric ceramic sheet 100 caused by excessive local stress can be avoided, further improving the reliability of the piezoelectric ceramic sheet 100.

[0045] In practical applications, the support member 300 can be fixed to the deformation section 220, or fixed to the piezoelectric ceramic sheet 100, or can be disposed between the deformation section 220 and the piezoelectric ceramic sheet 100. The specific shape and structure of the support member 300 can be determined according to actual conditions, and can be, for example, a block structure, a strip structure, a cylindrical structure, or other special-shaped structures. The support member 300 can be made of plastic, metal, or other materials.

[0046] In practical applications, the two fixed ends 210 can be bonded to the piezoelectric ceramic sheet 100. The shape of the deformable section 220 can be determined based on actual conditions, such as an arcuate structure, a hemispherical structure, a "∩"-shaped structure, or other special-shaped structures. Optionally, the elastic support sheet 200 can be a one-piece structure, such as an arcuate steel sheet.

[0047] In the piezoelectric pressing structure of the technical solution of the present invention, the elastic support sheet 200 includes two fixed end portions 210 and a deformation section 220 arranged between the two fixed end portions 210. The two fixed end portions 210 are fixedly connected to the two ends of one surface of the piezoelectric ceramic sheet 100, and the deformation section 220 is spaced apart from the piezoelectric ceramic sheet 100. Therefore, when the deformation section 220 is pressed toward the piezoelectric ceramic sheet 100, it will squeeze the two fixed end portions 210 to move in the opposite direction, so that the piezoelectric ceramic sheet 100 is stretched to generate a corresponding electrical signal, thereby realizing the function of converting mechanical energy into electrical energy. By arranging the support member 300 between the deformation section 220 and the piezoelectric ceramic sheet 100, the movement distance of the deformation section 220 when being pressed is reduced, thereby reducing the distance that the two fixed portion ends 210 move in opposite directions, thereby reducing the tensile force on the piezoelectric ceramic sheet 100 and preventing the piezoelectric ceramic sheet 100 from breaking; at the same time, the surface of the support member 300 facing the piezoelectric ceramic sheet 100 is flat. When the deformation section 220 is pressed, the support member 300 can form surface contact with the piezoelectric ceramic sheet 100, thereby preventing the piezoelectric ceramic sheet 100 from being deformed and broken due to excessive local stress in the piezoelectric ceramic sheet 100, thereby further improving the reliability of the piezoelectric ceramic sheet 100.

[0048] In one embodiment of the present application, Figures 1 to 6The deformation section 220 includes two connecting arms 221 and a pressing portion 222 arranged between the two connecting arms 221. The pressing portion 222 is arranged opposite to the piezoelectric ceramic piece 100 at an interval. The two connecting arms 221 respectively connect the opposite ends of the pressing portion 222 and the two fixed end portions 210; the support member 300 is arranged between the pressing portion 222 and the piezoelectric ceramic piece 100.

[0049] In this embodiment, a connecting arm 221 connects a fixed end portion 210 and one end of a pressing portion 222, and another connecting arm 221 connects another fixed end portion 210 and the other end of the pressing portion 222. At this time, the pressing portion 222 is supported by the two connecting arms 221 so that the pressing portion 222 is spaced apart and arranged relative to the piezoelectric ceramic sheet 100. The pressing portion 222 can move closer to or away from the piezoelectric ceramic sheet 100, and the connecting arm 221 drives the two fixed end portions 210 to move back to back or towards each other, thereby achieving stretching or contraction deformation of the piezoelectric ceramic sheet 100. Optionally, the connecting arm 221 can be a spring structure, and the connecting arm 221 is arranged obliquely to the piezoelectric ceramic sheet 100, with the end closer to the piezoelectric ceramic sheet 100 connected to the fixed end portion 210 and the end away from the piezoelectric ceramic sheet 100 connected to the pressing portion 222.

[0050] By positioning the support member 300 between the pressing portion 222 and the piezoelectric ceramic sheet 100, the support member 300 can shorten the distance the pressing portion 222 moves when pressed toward the piezoelectric ceramic sheet 100, thereby reducing the distance of movement of the two fixed ends 210, reducing the tensile force on the piezoelectric ceramic sheet 100, and ensuring the reliability of the piezoelectric ceramic sheet 100. Furthermore, the support member 300 can prevent point or line contact between the pressing portion 222 and the piezoelectric ceramic sheet 100, thereby preventing excessive local stress on the piezoelectric ceramic sheet 100.

[0051] In one embodiment of the present application, Figures 1 to 5 The support member 300 is disposed on the surface of the pressing portion 222 facing the piezoelectric ceramic sheet 100 .

[0052] In this embodiment, the support member 300 is arranged on the pressing portion 222, which can enhance the strength of the pressing portion 222. When the pressing portion 222 is pressed, the support member 300 and the pressing portion 222 will move toward the piezoelectric ceramic piece 100 together. At this time, the pressing portion 222 will not bend and deform, and the two fixed end portions 210 are driven to move in opposite directions through the deformation of the two connecting arms 221. This arrangement not only reduces the moving distance of the pressing portion 222 and reduces the tensile force on the piezoelectric ceramic piece 100, but also increases the contact area between the support member 300 and the piezoelectric ceramic piece 100, so that the force on the piezoelectric ceramic piece 100 is more uniform.

[0053] In practical applications, such as Figures 1 to 4 , the support member 300 and the pressing portion 222 can be an integrated structure.

[0054] As an example, Figure 1 and Figure 2 The support member 300 may be a convex structure with the pressing portion 222 protruding toward the piezoelectric ceramic sheet 100 , and may be integrally formed by stamping or molding.

[0055] As an example, Figure 3 and Figure 4 The support member 300 can also be formed by integrally bending the edge of the pressing portion 222. Optionally, the support member 300 includes two support portions, each formed by bending the edges of the pressing portion 222 toward opposite sides. This arrangement increases the surface area of ​​the support member 300 facing the piezoelectric ceramic sheet 100, increasing the contact area between the support member 300 and the piezoelectric ceramic sheet 100, and further improving the reliability of the piezoelectric ceramic sheet 100.

[0056] In practical applications, such as Figure 5 , the support member 300 and the pressing portion 222 can be a separate structure.

[0057] As an example, the support member 300 is bonded or welded to the surface of the pressing portion 222 facing the piezoelectric ceramic sheet 100. The support member 300 can be made of a metal material or a non-metal material.

[0058] In one embodiment of the present application, Figures 1 to 5 , the distance D between the support member 300 and the piezoelectric ceramic sheet 100 satisfies: 0.05mm≤D≤10mm.

[0059] As can be seen from the aforementioned embodiment, the support member 300 is fixed to the pressing portion 222. Therefore, when the pressing portion 222 is pressed, the pressing portion 222 drives the support member 300 toward the piezoelectric ceramic sheet 100 until it contacts it. The distance D between the support member 300 and the piezoelectric ceramic sheet 100 should not be too large or too small. If it is too large, the pressing portion 222 moves too far when pressed, and the two fixed ends 210 move too far away from each other, resulting in excessive tensile force on the piezoelectric ceramic sheet 100, which may easily break the piezoelectric ceramic sheet 100. If it is too small, the contraction deformation of the piezoelectric ceramic sheet 100 is not easily transmitted to the pressing portion 222, which may result in poor touch pressure feedback. Based on this, in this embodiment, the distance D between the support member 300 and the piezoelectric ceramic sheet 100 is set to meet 0.05mm≤D≤10mm, ensuring the touch pressure feedback function while improving the reliability of the piezoelectric ceramic sheet 100. Optionally, the distance D between the support member 300 and the piezoelectric ceramic sheet 100 can be determined according to actual conditions, for example, 0.05mm, 0.1mm, 0.5mm, 1mm, 1.1mm, 1.15mm, 1.5mm, 2mm, 2.05mm, 2.5mm, 3mm, 3.1mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0060] In one embodiment of the present application, Figure 6 The support member 300 is disposed on the surface of the piezoelectric ceramic piece 100 facing the deformation section 220 .

[0061] In this embodiment, by placing the support member 300 on the piezoelectric ceramic sheet 100, the distance the deformable segment 220 moves when pressed can be reduced, thereby reducing the tensile force on the piezoelectric ceramic sheet 100. Furthermore, the deformable segment 220 and the support member 300 can be brought into contact with each other, preventing direct contact between the deformable segment 220 and the piezoelectric ceramic sheet 100 and thus avoiding excessive localized stress on the piezoelectric ceramic sheet 100. This arrangement can prevent the piezoelectric ceramic sheet 100 from breaking and improve its reliability.

[0062] Optionally, the support member 300 can be fixed to the surface of the piezoelectric ceramic sheet 100 facing the deformation section 220 by bonding. The support member 300 can be made of a metal material or a non-metal material.

[0063] In one embodiment of the present application, Figure 7 The support member 300 is a rectangular block structure, the length L of the support member 300 satisfies: 0.5mm≤L≤50mm, the width W of the support member 300 satisfies: 0.5mm≤L≤50mm, and the height H of the support member 300 satisfies: 0.05mm≤H≤20mm.

[0064] It is understood that the shape and structure of the support member 300 can be determined according to actual conditions. In this embodiment, considering the surface contact between the support member 300 and the piezoelectric ceramic sheet 100, the support member 300 can be optionally configured as a rectangular block structure to increase the mating area between the support member 300 and the piezoelectric ceramic sheet 100. The size of the support member 300 can be determined according to actual conditions. In this embodiment, considering the touch pressure feedback function and the reliability of the piezoelectric ceramic sheet 100, the length L of the support member 300 is selected to be 0.5mm≤L≤50mm, the width W of the support member 300 is selected to be 0.5mm≤L≤50mm, and the height H of the support member 300 is selected to be 0.05mm≤H≤20mm. This improves the reliability of the piezoelectric ceramic sheet 100 when pressed and ensures that the piezoelectric pressing structure has a good tactile feedback effect.

[0065] In one embodiment of the present application, Figure 1 、 Figure 3 、 Figure 5 as well as Figure 6 The piezoelectric pressing structure includes two elastic support sheets 200 , which are respectively arranged on two opposite surfaces of the piezoelectric ceramic sheet 100 , and a support member 300 is provided between each deformation segment 220 and the piezoelectric ceramic sheet 100 .

[0066] In this embodiment, elastic support sheets 200 and support members 300 are provided on opposite sides of the piezoelectric ceramic sheet 100. When the elastic support sheet 200 on one side is pressed, the elastic support sheet 200 on the other side will also deform accordingly, thereby offsetting the force applied to the piezoelectric ceramic sheet 100 in a direction perpendicular to the piezoelectric ceramic sheet 100. As a result, the piezoelectric ceramic sheet 100 will only be stretched and deformed along the lateral ends while avoiding vertical deformation. This further improves the reliability of the piezoelectric ceramic sheet 100 when pressed.

[0067] The present utility model also proposes a tactile feedback device, which includes a piezoelectric pressing structure. The specific structure of the piezoelectric pressing structure refers to the above-mentioned embodiment. Since the present tactile feedback device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A piezoelectric pressing structure, characterized in that: include: Piezoelectric ceramics; An elastic support sheet, comprising two fixed ends and a deformation section arranged between the two fixed ends, the two fixed ends are fixedly connected to two ends of one surface of the piezoelectric ceramic sheet, and the deformation section is spaced apart from the piezoelectric ceramic sheet; and A support member is provided between the deformation section and the piezoelectric ceramic sheet, and a surface of the support member facing the piezoelectric ceramic sheet is a plane; Wherein, the deformation section is used to move toward the piezoelectric ceramic sheet when pressed, so that the two fixed ends move in opposite directions to stretch the piezoelectric ceramic sheet.

2. The piezoelectric pressing structure according to claim 1, characterized in that: The deformation section comprises two connecting arms and a pressing portion disposed between the two connecting arms, the pressing portion and the piezoelectric ceramic sheet are arranged opposite to each other with a gap, and the two connecting arms respectively connect the opposite ends of the pressing portion and the two fixed ends; The supporting member is arranged between the pressing portion and the piezoelectric ceramic sheet.

3. The piezoelectric pressing structure according to claim 2, characterized in that: The support member is arranged on a surface of the pressing portion facing the piezoelectric ceramic sheet.

4. The piezoelectric pressing structure according to claim 3, characterized in that: The support member and the pressing portion are an integrated structure.

5. The piezoelectric pressing structure according to claim 4, characterized in that: The pressing portion is protruded toward the piezoelectric ceramic sheet to form the supporting member; Alternatively, the support member includes two support portions, and the two support portions are formed by bending two side edges of the pressing portion toward opposite sides.

6. The piezoelectric pressing structure according to claim 3, characterized in that: The support member is bonded or welded to a surface of the pressing portion facing the piezoelectric ceramic sheet.

7. The piezoelectric pressing structure according to any one of claims 3 to 6, characterized in that: The distance D between the support member and the piezoelectric ceramic sheet satisfies: 0.05 mm≤D≤10 mm.

8. The piezoelectric pressing structure according to claim 1 or 2, characterized in that: The support member is arranged on a surface of the piezoelectric ceramic sheet facing the deformation section.

9. The piezoelectric pressing structure according to any one of claims 1 to 6, characterized in that: The support member is in a square block structure, the length L of the support member satisfies: 0.5mm≤L≤50mm, the width W of the support member satisfies: 0.5mm≤L≤50mm, and the height H of the support member satisfies: 0.05mm≤H≤20mm.

10. The piezoelectric pressing structure according to any one of claims 1 to 6, characterized in that: The piezoelectric pressing structure includes two elastic support sheets, which are respectively arranged on two opposite surfaces of the piezoelectric ceramic sheet, and the support member is arranged between each deformation segment and the piezoelectric ceramic sheet.

11. A tactile feedback device, characterized in that: Comprising the piezoelectric pressing structure as claimed in any one of claims 1 to 10.

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