Spring plate, actuating assembly and piezoelectric valve

Abstract

The utility model discloses a spring plate which is in a sheet shape and comprises a first installation portion, a second installation portion and a third installation portion. The second mounting part is arranged opposite to the first mounting part; the telescopic part is located between the first mounting part and the second mounting part, one end of the telescopic part is connected with the first mounting part, and the other end of the telescopic part is connected with the second mounting part; when the telescopic part stretches, the distance between the first mounting part and the second mounting part is lengthened, and when the telescopic part retracts, the distance between the first mounting part and the second mounting part is shortened. According to the utility model, the spring plate is designed to be sheet-shaped, and the telescopic function is realized by utilizing the reset capability of the telescopic part after elastic deformation, so that the distance between the first mounting part and the second mounting part can be lengthened or shortened along with the deformation of the telescopic part so as to drive other parts to be quickly reset after deformation; and the spring plate is fixed through the first mounting part and the second mounting part, so that the spring plate and other parts can be integrally disassembled and assembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of piezoelectric valves, and in particular relates to a spring plate, an actuating component and a piezoelectric valve. Background Art

[0002] Piezoelectric valves are often needed in dispensing equipment to control the amount of glue dispensed. The piezoelectric valve needs to be reset by a reset mechanism after the actuator is actuated. The traditional reset method is to set a spring to elastically reset the top block. In this method, each component in the piezoelectric valve needs to be installed separately, and additional installation space for the spring is required. At the same time, the spring, top block and actuator are in abutment contact and lack fixing parts for fixation, making assembly very difficult. In addition, the cylindrical spring occupies a large volume. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the utility model proposes a spring plate, an actuating assembly and a piezoelectric valve. The spring plate has the advantages of uniform deformation, being able to quickly reset the actuator, having a compact structure and being suitable for overall assembly.

[0005] According to the spring plate of the embodiment of the utility model, the spring plate is in the shape of a sheet, and the spring plate includes: a first mounting portion; a second mounting portion, the second mounting portion is arranged opposite to the first mounting portion; a telescopic portion, the telescopic portion is located between the first mounting portion and the second mounting portion, one end of the telescopic portion is connected to the first mounting portion, and the other end of the telescopic portion is connected to the second mounting portion; when the telescopic portion is extended, the distance between the first mounting portion and the second mounting portion is lengthened, and when the telescopic portion is contracted, the distance between the first mounting portion and the second mounting portion is shortened.

[0006] The beneficial effect of the utility model is that the utility model designs the spring plate into a sheet shape and realizes the telescopic function by utilizing the elastic reset ability of the telescopic part after elastic deformation, so that the distance between the first mounting part and the second mounting part can be lengthened or shortened as the telescopic part is deformed, so as to drive other components to reset quickly after deformation, and the spring plate is fixed by the first mounting part and the second mounting part, so as to facilitate the overall disassembly and assembly of the spring plate and other components.

[0007] According to an embodiment of the present invention, the telescopic portion includes a plurality of telescopic joints, and the plurality of telescopic joints are arranged at intervals between the first mounting portion and the second mounting portion.

[0008] According to one embodiment of the utility model, the telescopic joint includes a first bend, a second bend, a third bend and a fourth bend, the first bend, the third bend, the second bend and the fourth bend are connected end to end in sequence, the first bend and the second bend are arranged opposite to each other, and the third bend and the fourth bend are arranged opposite to each other.

[0009] According to one embodiment of the utility model, a first telescopic cavity is formed between the first bend, the third bend and the fourth bend, a second telescopic cavity is formed between the second bend, the third bend and the fourth bend, the first telescopic cavity and the second telescopic cavity are symmetrically arranged, and the first telescopic cavity and the second telescopic cavity are connected.

[0010] According to one embodiment of the utility model, a connecting portion is provided on the third bending portion and the fourth bending portion, and a third telescopic cavity and a fourth telescopic cavity are formed between the connecting portion, the third bending portion connected to one end of the connecting portion, and the fourth bending portion connected to the other end of the connecting portion, and the third telescopic cavity and the fourth telescopic cavity are symmetrically arranged about the connecting portion.

[0011] According to one embodiment of the utility model, when the telescopic portion is extended, the third bend portion and the fourth bend portion in one telescopic section move away from each other so that the portion connected between the first telescopic cavity and the second telescopic cavity is expanded, and at the same time, in two adjacent telescopic sections, the two first bend portions move away from each other so that the opening of the third telescopic cavity is expanded, and the two second bend portions move away from each other so that the opening of the fourth telescopic cavity is expanded.

[0012] According to one embodiment of the utility model, when the telescopic portion contracts, the third bend portion and the fourth bend portion in one telescopic section approach each other so that the portion connecting the first telescopic cavity and the second telescopic cavity is reduced, and at the same time, in two adjacent telescopic sections, the two first bend portions approach each other so that the opening of the third telescopic cavity is reduced, and the two second bend portions move away from each other so that the opening of the fourth telescopic cavity is reduced.

[0013] According to an embodiment of the utility model, the outer surface and the inner surface of the telescopic joint are both smooth curved surfaces, both ends of the first curved portion and the second curved portion are bent inwardly, and both ends of the third curved portion and the fourth curved portion are bent outwardly.

[0014] According to an embodiment of the present invention, the width of the first curved portion gradually decreases along the extension direction of its two ends, and the width of the second curved portion gradually decreases along the extension direction of its two ends.

[0015] According to an embodiment of the present invention, the first bend and the second bend are of the same length, the third bend and the fourth bend are of the same length, and the length of the first bend is smaller than the length of the third bend.

[0016] According to an embodiment of the present utility model, the first telescopic cavity, the second telescopic cavity, the third telescopic cavity and the fourth telescopic cavity are all water drop-shaped structures.

[0017] According to an embodiment of the utility model, the telescopic joint has a telescopic direction, and a plurality of the telescopic joints are arranged along the telescopic direction.

[0018] According to one embodiment of the utility model, an actuating assembly includes the above-mentioned spring plate, actuator, mounting block, top block and amplification lever, the number of the spring plates is two, the two spring plates are arranged on both sides of the actuator, one end of each spring plate is fixed to the mounting block, and the other end of the spring plate is fixed to the top block, the actuator is arranged between the mounting block and the top block and can push the top block to move, and the amplification lever is connected to the top block through a first elastic connecting piece and can swing upward and downward relative to the top block.

[0019] According to one embodiment of the utility model, a piezoelectric valve includes the above-mentioned actuating assembly, the mounting block is fixed on one side of the reference rod, one end of the amplifying lever is connected to the reference rod through a second elastic connecting piece, the reference rod and the actuating assembly are integrally arranged in a shell, and a striker is installed at the other end of the amplifying lever, the striker acts on the nozzle, and the amplifying lever drives the striker to move downward when swinging downward to make the nozzle discharge glue, and drives the striker to move upward when swinging upward to stop the nozzle from discharging glue.

[0020] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments of the present invention, in which:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a partial planar structural schematic diagram of the utility model;

[0025] Figure 3 is a schematic diagram of the structure of the actuating assembly;

[0026] Figure 4 is a schematic diagram of the structure of a piezoelectric valve;

[0027] Figure 5 is a schematic diagram of the cross-sectional structure of a piezoelectric valve;

[0028] Reference numerals:

[0029] The first mounting part 1, the second mounting part 2, the telescopic part 3, the telescopic joint 12, the first bending part 121, the second bending part 122, the third bending part 123, the fourth bending part 124, the first telescopic cavity 125, the second telescopic cavity 126, the connecting part 127, the third telescopic cavity 128, the fourth telescopic cavity 129, the actuator 4, the mounting block 5, the top block 6, the shell 7, the amplification lever 8, the striker 9, the nozzle 10, the reference rod 11, the first elastic connecting piece 111, and the second elastic connecting piece 112. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The spring plate, the actuating assembly and the piezoelectric valve according to the embodiment of the present utility model are described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-Figure 4 As shown, according to the spring plate of the embodiment of the utility model, the spring plate is in the shape of a sheet, and comprises: a first mounting portion 1, a second mounting portion 2 and a telescopic portion 3, the second mounting portion 2 is arranged opposite to the first mounting portion 1; the telescopic portion is located between the first mounting portion 1 and the second mounting portion 2, one end of the telescopic portion 3 is connected to the first mounting portion 1, and the other end of the telescopic portion 3 is connected to the second mounting portion 2; when the telescopic portion 3 is extended, the distance between the first mounting portion 1 and the second mounting portion 2 is lengthened, and when the telescopic portion 3 is contracted, the distance between the first mounting portion 1 and the second mounting portion 2 is shortened.

[0035] In this embodiment, round holes for screws to pass through are provided on the first mounting portion 1 and the second mounting portion 2, so as to fix the two ends of the spring plate.

[0036] Therefore, the utility model realizes the telescopic function by designing the spring plate into a sheet shape and utilizing the elastic deformation and reset ability of the telescopic part 3, so that the distance between the first mounting part 1 and the second mounting part 2 can be lengthened or shortened as the telescopic part 3 is deformed, so as to drive other components to reset quickly after deformation, and the spring plate is fixed by the first mounting part 1 and the second mounting part 2, so as to facilitate the overall disassembly and assembly of the spring plate and other components.

[0037] The telescopic portion 3 includes a plurality of telescopic joints 12, which are evenly spaced between the first mounting portion 1 and the second mounting portion 2. The plurality of telescopic joints 12 elastically deform together, so that the spring plate is elastically deformed evenly along the direction of force when force is applied.

[0038] In this embodiment, the telescopic joint 12 includes a first bend 121, a second bend 122, a third bend 123 and a fourth bend 124. The first bend 121, the third bend 123, the second bend 122 and the fourth bend 124 are connected end to end in sequence, the first bend 121 and the second bend 122 are arranged oppositely, and the third bend 123 and the fourth bend 124 are arranged oppositely. That is, the first bend 121, the second bend 122, the third bend 123 and the fourth bend 124 together form a square structure.

[0039] Furthermore, a first telescopic cavity 125 is formed between the first bend 121, the third bend 123 and the fourth bend 124, and a second telescopic cavity 126 is formed between the second bend 122, the third bend 123 and the fourth bend 124. The first telescopic cavity 125 and the second telescopic cavity 126 are symmetrically arranged and communicated with each other.

[0040] Furthermore, a connecting portion 127 is provided on the third bending portion 123 and the fourth bending portion 124, and a third telescopic cavity 128 and a fourth telescopic cavity 129 are formed between the connecting portion 127, the third bending portion 123 connected to one end of the connecting portion 127, and the fourth bending portion 124 connected to the other end of the connecting portion 127. The third telescopic cavity 128 and the fourth telescopic cavity 129 are symmetrically arranged about the connecting portion 127.

[0041] When the telescopic portion 3 is extended, the third curved portion 123 and the fourth curved portion 124 in one telescopic section 12 move away from each other, so that the portion communicating between the first telescopic cavity 125 and the second telescopic cavity 126 is expanded, and at the same time, in two adjacent telescopic sections 12, the two first curved portions 121 move away from each other, so that the opening of the third telescopic cavity 128 is expanded, and the two second curved portions 122 move away from each other, so that the opening of the fourth telescopic cavity 129 is expanded. When the telescopic portion 3 is contracted, the third curved portion 123 and the fourth curved portion 124 in one telescopic section 12 move toward each other, so that the portion communicating between the first telescopic cavity 125 and the second telescopic cavity 126 is reduced, and at the same time, in two adjacent telescopic sections 12, the two first curved portions 121 move toward each other, so that the opening of the third telescopic cavity 128 is reduced, and the two second curved portions 122 move away from each other, so that the opening of the fourth telescopic cavity 129 is reduced.

[0042] That is, when extending or contracting, the first telescopic cavity 125 and the second telescopic cavity 126 inside the telescopic joint 12 and the third telescopic cavity 128 and the fourth telescopic cavity 129 between adjacent telescopic joints 12 can provide a certain deformation space for the third bending portion 123 and the fourth bending portion 124 .

[0043] In this embodiment, the first telescopic cavity 125 , the second telescopic cavity 126 , the third telescopic cavity 128 and the fourth telescopic cavity 129 are all teardrop-shaped structures.

[0044] The teardrop-shaped structure includes a circular part and a conical part. The conical parts in the first telescopic cavity 125 and the second telescopic cavity 126 are arranged opposite to each other and connected, and the conical parts in the third telescopic cavity 128 and the fourth telescopic cavity 129 are arranged back to back. Since the circular part has stronger deformation resistance than the conical part, during the deformation process of the telescopic part 3, the middle part of the third bend 123 and the middle part of the fourth bend 124 in one telescopic section 12 are close to or away from each other, while in two adjacent telescopic sections 12, the two first bends 121 or the two second bends 122 are close to or away from each other.

[0045] According to an embodiment of the utility model, the outer surface and the inner surface of the expansion joint 12 are both smooth curved surfaces, and the smooth transition avoids the occurrence of cracks in the spring plate caused by stress concentration. Both ends of the first curved portion 121 and the second curved portion 122 are bent inward, and both ends of the third curved portion 123 and the fourth curved portion 124 are bent outward. Among them, the width of the first curved portion 121 gradually decreases along the extension direction of its two ends, and the width of the second curved portion 122 gradually decreases along the extension direction of its two ends.

[0046] That is to say, since both ends of the first bend 121 and the second bend 122 are bent inward, and both ends of the third bend 123 and the fourth bend 124 are bent outward, the first bend 121, the second bend 122, the third bend 123 and the fourth bend 124 form an arch structure, and the first bend 121, the second bend 122, the third bend 123 and the fourth bend 124 can be quickly reset when compressed or pulled. In other words, the spring plate needs to have a certain deformation ability under the premise of ensuring a certain strength. Therefore, the width of the first bend 121 and the second bend 122 is greater than that of the third bend 123 or the fourth bend 124. The curved portion 124, when the telescopic joint 12 performs telescopic action, the third curved portion 123 and the fourth curved portion 124 are deformed to a greater extent, and the first curved portion 121 and the second curved portion 122 are deformed to a lesser extent and have a greater restoring ability, so that the first curved portion 121 and the second curved portion 122 can pull the third curved portion 123 and the fourth curved portion 124 for rapid reset, and at the same time, the connecting portion 127 and the third curved portion 123 or the fourth curved portion 124 are connected at a corner with a smooth transition. The smooth transition between the outer surface and the inner surface of the telescopic joint 12 avoids stress concentration on the one hand, and increases the connection strength on the other hand, thereby improving the ability to quickly reset after a certain deformation.

[0047] According to an embodiment of the present invention, the first bend 121 and the second bend 122 have the same length, the third bend 123 and the fourth bend 124 have the same length, and the length of the first bend 121 is less than that of the third bend 123 .

[0048] On the one hand, the length direction of the third bend 123 and the fourth bend 124 is perpendicular to the extension and retraction direction of the telescopic joint 12, and the length direction of the first bend 121 and the second bend 122 is parallel to the extension and retraction direction of the telescopic joint 12. On the other hand, the length of the first bend 121 is smaller than the length of the third bend 123 and the width of the first bend 121 is larger than the width of the third bend 123. This makes the first bend 121 and the second bend 122 have stronger deformation resistance than the third bend 123 and the fourth bend 124 when the telescopic joint 12 is extended and retracted.

[0049] According to an embodiment of the present invention, the telescopic joint 12 has a telescopic direction, and a plurality of telescopic joints 12 are arranged along the telescopic direction, so that each telescopic joint 12 can be deformed evenly, thereby improving the resetting effect after deformation.

[0050] Combination Figure 3 As shown, the utility model also discloses an actuating assembly, including the above-mentioned spring plate, actuator 4, mounting block 5, top block 6 and amplifying lever 8, the number of spring plates is two, the two spring plates are arranged on both sides of the actuator 4, one end of each spring plate is fixed to the mounting block 5, and the other end of the spring plate is fixed to the top block 6, the actuator 4 is arranged between the mounting block 5 and the top block 6 and can push the top block 6 to move, the amplifying lever 8 is connected to the top block 6 through the first elastic connecting piece 111 and can swing upward and downward relative to the top block 6, wherein the actuator 4 is a piezoelectric ceramic.

[0051] That is to say, the utility model symmetrically arranges two spring plates on both sides of the actuator 4, and the two spring plates can constrain the actuator 4. When the actuator 4 is energized and deformed, the constraining effect of the two spring plates can make the deformation of the actuator 4 more uniform, thereby ensuring the stability of the actuator 4 when pushing the top block 6 to move downward.

[0052] When the actuator 4 is powered on, the length of the actuator 4 is stretched, and a force is applied to the amplifying lever 8 through the top block 6, so that the amplifying lever 8 swings downward relative to the top block 6; when the actuator 4 is powered off, the length of the actuator 4 is reset, and the spring plates on both sides pull the top block 6 upward through elastic force in time, so that the amplifying lever 8 swings upward relative to the top block 6; in other words, the spring plates on both sides can respond quickly when the actuator 4 is powered on and off, so that the amplifying lever 8 swings in time, thereby improving the operating efficiency of the entire actuator assembly.

[0053] Combination Figure 4 and Figure 5As shown, the utility model also discloses a piezoelectric valve, including the above-mentioned actuating assembly, wherein the mounting block 5 is fixed on one side of the reference rod 11, one end of the amplifying lever 8 is connected to the reference rod 11 through a second elastic connecting piece 112, the reference rod 11 and the actuating assembly are integrally arranged in the housing 7, and a striker 9 is installed at the other end of the amplifying lever 8, the striker 9 acts on the nozzle 10, and the amplifying lever 8 drives the striker 9 to move downward when swinging downward to make the nozzle 10 discharge glue, and drives the striker 9 to move upward when swinging upward to stop the nozzle 10 from discharging glue.

[0054] In this embodiment, the reference rod 11, the top block 6, the amplifying lever 8, the first elastic connecting piece 111 and the second elastic connecting piece 112 can be manufactured from a whole piece of metal material through a wire cutting process. The mounting block 5 is detachably fixed to the reference rod 11 by screws, so that the spring plate is in a certain tensile state during installation, thereby tightly pressing the mounting block 5, the actuator 4 and the top block 6 together, which ensures that when the actuator 4 is deformed, it can promptly transmit the force to the top block 6, thereby driving the amplifying lever 8 to swing downward to complete the glue discharge. When the actuator 4 is powered off, the spring plate promptly pulls the top block 6 to reset, thereby driving the amplifying lever 8 to swing upward to stop the glue discharge, thereby ensuring the accuracy of the glue discharge control.

[0055] The above-mentioned actuating assembly is used in a piezoelectric valve, so that the action of the top block in the piezoelectric valve can be more stable, and the deformation and recovery effects of the spring plate are good, the service life is longer, and the control accuracy of the piezoelectric valve is more stable.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spring plate, the spring plate is in sheet shape, characterized in that: include: A first mounting portion (1); a second mounting portion (2), the second mounting portion (2) being arranged opposite to the first mounting portion (1); a telescopic portion (3), the telescopic portion being located between the first mounting portion (1) and the second mounting portion (2), one end of the telescopic portion (3) being connected to the first mounting portion (1), and the other end of the telescopic portion (3) being connected to the second mounting portion (2); When the telescopic portion (3) is extended, the distance between the first mounting portion (1) and the second mounting portion (2) is lengthened; when the telescopic portion (3) is contracted, the distance between the first mounting portion (1) and the second mounting portion (2) is shortened.

2. The spring plate according to claim 1, characterized in that The telescopic portion (3) comprises a plurality of telescopic joints (12), and the plurality of telescopic joints (12) are arranged at intervals between the first mounting portion (1) and the second mounting portion (2).

3. The spring plate according to claim 2, characterized in that The telescopic joint (12) comprises a first bend (121), a second bend (122), a third bend (123) and a fourth bend (124); the first bend (121), the third bend (123), the second bend (122) and the fourth bend (124) are connected end to end in sequence; the first bend (121) and the second bend (122) are arranged opposite to each other, and the third bend (123) and the fourth bend (124) are arranged opposite to each other.

4. The spring plate according to claim 3, characterized in that A first telescopic cavity (125) is formed between the first curved portion (121), the third curved portion (123) and the fourth curved portion (124); a second telescopic cavity (126) is formed between the second curved portion (122), the third curved portion (123) and the fourth curved portion (124); the first telescopic cavity (125) and the second telescopic cavity (126) are symmetrically arranged, and the first telescopic cavity (125) and the second telescopic cavity (126) are connected.

5. The spring plate according to claim 4, characterized in that The third curved portion (123) and the fourth curved portion (124) are both provided with a connecting portion (127); a third telescopic cavity (128) and a fourth telescopic cavity (129) are formed between the connecting portion (127), the third curved portion (123) connected to one end of the connecting portion (127), and the fourth curved portion (124) connected to the other end of the connecting portion (127); the third telescopic cavity (128) and the fourth telescopic cavity (129) are symmetrically arranged with respect to the connecting portion (127).

6. The spring plate according to claim 5, characterized in that When the telescopic portion (3) is extended, the third bent portion (123) and the fourth bent portion (124) in one telescopic section (12) move away from each other, so that the portion communicating between the first telescopic cavity (125) and the second telescopic cavity (126) is expanded; at the same time, in two adjacent telescopic sections (12), the two first bent portions (121) move away from each other, so that the opening of the third telescopic cavity (128) is expanded, and the two second bent portions (122) move away from each other, so that the opening of the fourth telescopic cavity (129) is expanded.

7. The spring plate according to claim 5, characterized in that When the telescopic portion (3) contracts, the third bend (123) and the fourth bend (124) in one telescopic section (12) move closer to each other, so that the portion communicating between the first telescopic cavity (125) and the second telescopic cavity (126) is reduced. At the same time, in two adjacent telescopic sections (12), the two first bends (121) move closer to each other, so that the opening of the third telescopic cavity (128) is reduced, and the two second bends (122) move closer to each other, so that the opening of the fourth telescopic cavity (129) is reduced.

8. The spring plate according to claim 5, characterized in that In a telescopic joint (12), both the outer surface and the inner surface of the telescopic joint (12) are smooth curved surfaces, both ends of the first curved portion (121) and the second curved portion (122) are bent inwardly, and both ends of the third curved portion (123) and the fourth curved portion (124) are bent outwardly.

9. The spring plate according to claim 5, characterized in that The width of the first curved portion (121) gradually decreases along the extension direction of its two ends, and the width of the second curved portion (122) gradually decreases along the extension direction of its two ends.

10. The spring plate according to claim 9, characterized in that The first curved portion (121) and the second curved portion (122) have the same length, the third curved portion (123) and the fourth curved portion (124) have the same length, and the length of the first curved portion (121) is shorter than the length of the third curved portion (123).

11. The spring plate according to claim 6, characterized in that The first telescopic cavity (125), the second telescopic cavity (126), the third telescopic cavity (128) and the fourth telescopic cavity (129) are all water drop-shaped structures.

12. The spring plate according to claim 2, characterized in that The telescopic joint (12) has a telescopic direction, and a plurality of the telescopic joints (12) are arranged along the telescopic direction.

13. An actuating assembly, characterized in that: The invention comprises a spring plate, an actuator (4), a mounting block (5), a top block (6) and an amplifying lever (8) as claimed in any one of claims 1 to 12, wherein the number of the spring plates is two, the two spring plates are arranged on both sides of the actuator (4), one end of each spring plate is fixed to the mounting block (5), and the other end of the spring plate is fixed to the top block (6), the actuator (4) is arranged between the mounting block (5) and the top block (6) and can push the top block (6) to move, and the amplifying lever (8) is connected to the top block (6) through a first elastic connecting piece (111) and can swing upward and downward relative to the top block (6).

14. A piezoelectric valve, characterized in that: The invention comprises an actuating assembly as claimed in claim 13, wherein the mounting block (5) is fixed on one side of a reference rod (11), one end of the amplifying lever (8) is connected to the reference rod (11) via a second elastic connecting piece (112), the reference rod (11) and the actuating assembly are integrally arranged in a housing (7), a striker (9) is installed on the other end of the amplifying lever (8), the striker (9) acts on a nozzle (10), the amplifying lever (8) drives the striker (9) to move downward when swinging downward, so that the nozzle (10) discharges glue, and the amplifying lever (8) drives the striker (9) to move upward when swinging upward, so that the nozzle (10) stops discharging glue.

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