CN216701683U - Ultrasonic atomization sheet, atomizer and aerosol generating device - Google Patents

Abstract

The utility model provides an ultrasonic atomization sheet, an atomizer and an aerosol generating device. In the ultrasonic atomization piece structure, when the metal plate is installed on the face of the second electrode layer deviating from the piezoelectric ceramic piece, each first limit lug can play a supporting and holding constraint role on the piezoelectric ceramic piece from the periphery of the piezoelectric ceramic piece towards the central position of the piezoelectric ceramic piece, so that the piezoelectric ceramic piece is limited between a plurality of first limit lugs of the metal plate, the metal plate is accurately limited in an allowed deviation range relative to the offset of the piezoelectric ceramic piece, the metal plate and the piezoelectric ceramic piece are effectively prevented from being seriously eccentric, the metal plate and the piezoelectric ceramic piece can be always kept in centering alignment, and the stable reliability of the atomization work of the ultrasonic atomization piece is improved.

Description

Ultrasonic atomization sheet, atomizer and aerosol generating device

Technical Field

The utility model belongs to the technical field of atomization and simulated smoking, and particularly relates to an ultrasonic atomization sheet, an atomizer and an aerosol generating device.

Background

The aerosol generating device generally includes an atomizer and a power supply device electrically connected to the atomizer, and the atomizer is capable of atomizing an aerosol-forming substrate stored in the atomizer under an electrically driven action of the power supply device, so as to enable a user to inhale and achieve a simulated smoking effect.

At present, in the structure of the ultrasonic atomization piece of atomizer, the metal sheet piece that central point put and have the micropore generally directly pastes on piezoceramics, and metal sheet piece and piezoceramics can't keep counterpointing placed in the middle, and this not only can cause the micropore to go out the fog and not form the hydrops in eccentric one side at central point put, and the central micropore that still can cause metal sheet piece vibrates the shrink range all around inhomogeneous and influence atomization efficiency. In addition, after the metal plate sheet and the piezoelectric ceramic piece are eccentric, the peripheral size of the piezoelectric ceramic piece is easy to be enlarged and irregular deformation is easy to be generated.

SUMMERY OF THE UTILITY MODEL

Based on the above problems in the prior art, an object of an embodiment of the present invention is to provide an ultrasonic atomization plate, so as to solve the problem that in an ultrasonic atomization plate structure in the prior art, a metal plate and a piezoelectric ceramic plate are easily eccentric, so that the metal plate and the piezoelectric ceramic plate cannot be centered and aligned.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a nebulizer, comprising:

the piezoelectric ceramic piece is provided with a through hole in a penetrating manner at the middle position, and the two ends of the piezoelectric ceramic piece along the axial direction of the through hole are respectively provided with a first surface and a second surface;

a first electrode layer stacked on the first surface;

a second electrode layer stacked on the second surface;

the diaphragm piece is arranged on one surface of the first electrode layer, which is far away from the piezoelectric ceramic piece; and

the metal sheet is arranged on one surface of the second electrode layer, which is far away from the piezoelectric ceramic piece, and is electrically connected with the second electrode layer, and micropores are formed in the positions, corresponding to the through holes, of the metal sheet;

the periphery of the metal plate is provided with a plurality of first limiting lugs, and each first limiting lug is provided with a first connecting end used for being fixed on the metal plate and a first suspending end extending to the side of the piezoelectric ceramic piece so that the first limiting lug can abut against the outer peripheral surface of the piezoelectric ceramic piece.

Further, a plurality of first spacing ears set up along the circumference interval of sheet metal piece.

Further, the distance between two adjacent first limit lugs is equal.

Furthermore, the first limiting lug comprises a first connecting plate and a first limiting plate connected with the first connecting plate, the first connecting plate is provided with the first connecting end, and the first limiting plate is provided with the first suspension end.

Furthermore, a first stress release notch which avoids the first connecting plate is formed in the periphery of the metal plate, the first connecting end of the first connecting plate is fixedly connected with the metal plate, and the first connecting plate is located in the first stress release notch, so that a first stress release groove for releasing stress is formed between the corresponding side edge of the first connecting plate and the metal plate.

Furthermore, an included angle between the first limiting plate and the first connecting plate is a right angle or an acute angle.

Furthermore, the first limiting plate is formed by bending one end of the first connecting plate, which deviates from the first connecting end, towards the piezoelectric ceramic plate.

Further, the first connecting plate and the metal plate are integrally formed, and the first connecting plate and the metal plate are located on the same plane.

Based on the above problems in the prior art, it is another object of the embodiments of the present invention to provide a nebulizer having the ultrasonic atomization plate in any of the above solutions.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided an atomizer comprising the ultrasonic atomization sheet provided in any of the above aspects.

Based on the above problems in the prior art, it is another object of the embodiments of the present invention to provide an aerosol generating device having the ultrasonic atomization sheet or the atomizer in any of the above aspects.

In order to realize the purpose, the utility model adopts the technical scheme that: there is provided an aerosol generating device comprising the ultrasonic atomization sheet or the atomizer provided in any of the above aspects.

Compared with the prior art, one or more technical schemes in the embodiment of the utility model have at least one of the following beneficial effects:

in the ultrasonic atomization sheet, the atomizer and the aerosol generating device in the embodiment of the utility model, the plurality of first limiting lugs are arranged on the periphery of the metal sheet, so that when the metal sheet is arranged on one surface of the second electrode layer, which is far away from the piezoelectric ceramic sheet, each first limiting lug can exert a supporting and restraining effect on the piezoelectric ceramic sheet from the periphery of the piezoelectric ceramic sheet to the center of the piezoelectric ceramic sheet, so that the piezoelectric ceramic sheet is limited among the plurality of first limiting lugs of the metal sheet, the offset of the metal sheet relative to the piezoelectric ceramic sheet is accurately limited in an allowable deviation range, the metal sheet and the piezoelectric ceramic sheet are effectively prevented from being seriously eccentric, the metal sheet and the piezoelectric ceramic sheet are always kept in central alignment, and the stable reliability of atomization work of the ultrasonic atomization sheet is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of an ultrasonic atomization sheet provided in an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the ultrasonic atomization sheet shown in FIG. 1;

FIG. 3 is an exploded view of the ultrasonic atomization plate shown in FIG. 1;

FIG. 4 is a schematic structural view of a metal sheet of the ultrasonic atomization sheet shown in FIG. 1;

FIG. 5 is a schematic view of a portion A of FIG. 4;

FIG. 6 is a schematic perspective view of an ultrasonic atomization plate according to another embodiment of the present invention;

FIG. 7 is a cross-sectional structural schematic view of the ultrasonic atomization sheet shown in FIG. 6;

FIG. 8 is an exploded view of the ultrasonic atomization patch shown in FIG. 6;

FIG. 9 is a partially enlarged view of the portion B in FIG. 8;

fig. 10 is a partially enlarged schematic view of a portion C in fig. 8.

Wherein, in the figures, the respective reference numerals:

1-a piezoelectric ceramic sheet; 11-a through hole; 12-a first side; 13-a second face;

2-a first electrode layer; 3-a second electrode layer;

4-a diaphragm member; 41-a first annulus; 42-a glass sheet; 43-a metal diaphragm;

5-a metal sheet; 51-an annular protective sheet; 52-a membrane portion; 53-second annulus; 54-micropores;

6-a first limit lug; 61-a first connection plate; 62-a first limiting plate; 63-a first connection end; 64-first free end; 65-first stress relief groove;

7-a second limit lug; 71-a second connecting plate; 72-a second limiting plate; 73-a second connection end; 74-second free end; 75-a second stress relief groove;

8-a first tab; 9-a second tab; 10-second conductive adhesive layer.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "connected" or "disposed" to another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "plurality" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment," "in some embodiments," or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1 to 10 together, an ultrasonic atomization plate according to an embodiment of the present invention will now be described. The ultrasonic atomization sheet provided by the embodiment of the utility model is not only suitable for an atomizer of an aerosol generating device, but also can be applied to medical equipment such as a medicine atomizer with an ultrasonic atomization function, household appliances such as a humidifier and the like. The aerosol generating device according to the embodiment of the present invention generally includes an atomizer having an ultrasonic atomization plate, and a power supply device electrically connected to the atomizer. When the ultrasonic atomizer is used, the power supply device is used for supplying electric energy to the ultrasonic atomization sheet of the atomizer, the piezoelectric element of the ultrasonic atomization sheet, namely the piezoelectric ceramic, can convert the electric energy into mechanical energy through the inverse piezoelectric effect under the electric driving effect, and the piezoelectric ceramic is repeatedly deformed to generate vibration. During vibration of the piezoelectric ceramic, the aerosol-forming substrate is able to be squeezed out of the pores 54, thereby forming a fine particle aerosol.

Referring to fig. 1, 3 and 5, an ultrasonic atomizing sheet according to an embodiment of the present invention includes a piezoelectric ceramic sheet 1, a first electrode layer 2, a second electrode layer 3, a membrane piece 4 and a metal plate 5, a through hole 11 is formed through a center of the piezoelectric ceramic sheet 1, the membrane piece 4 has a first annular hole 41 aligned with and communicated with the through hole 11, and two ends of the piezoelectric ceramic sheet 1 along an axial direction of the through hole 11 respectively have a first surface 12 and a second surface 13. In order to apply voltage to the first surface 12 and the second surface 13 of the piezoelectric ceramic plate 1 respectively to make the piezoelectric ceramic plate 1 vibrate under the driving action of electric energy, a first electrode layer 2 needs to be arranged on the first surface 12 of the piezoelectric ceramic plate 1, and a second electrode layer 3 needs to be arranged on the second surface 13 of the piezoelectric ceramic plate 1. It is understood that in some embodiments, the first electrode layer 2 may be, but is not limited to, a first conductive silver layer plated or printed on the first side 12 of the piezoceramic sheet 1, and the first electrode layer 2 may also be a first conductive gold layer or a first conductive copper layer or the like disposed on the first side 12 of the piezoceramic sheet 1. Likewise, the second electrode layer 3 may be, but is not limited to, a second conductive silver layer plated or printed on the second side 13. The second electrode layer 3 may also be a second conductive gold layer or a second conductive copper layer, etc. disposed on the second surface 13 of the piezoelectric ceramic sheet 1.

Referring to fig. 2 and fig. 3, the first electrode layer 2 is stacked on the first surface 12 of the piezoelectric ceramic plate 1, and the diaphragm member 4 is disposed on a surface of the first electrode layer 2 away from the piezoelectric ceramic plate 1. It is understood that in some embodiments, the diaphragm member 4 may include a glass sheet 42, and the glass sheet 42 is covered on a side of the first electrode layer 2 facing away from the piezoceramic sheet 1. In other embodiments, the diaphragm member 4 may also include a metal diaphragm 43, the metal diaphragm 43 is disposed on a surface of the first electrode layer 2 facing away from the piezoelectric ceramic plate 1, and the metal diaphragm 43 is electrically connected to the first electrode layer 2. The second electrode layer 3 is stacked on the second surface 13 of the piezoelectric ceramic plate 1, the metal sheet 5 is arranged on the surface of the second electrode layer 3 departing from the piezoelectric ceramic plate 1, the metal sheet 5 is electrically connected with the second electrode layer 3, and the metal sheet 5 is provided with a micropore 54 corresponding to the through hole 11. In this way, during vibration of the piezoceramic wafer 1, the aerosol-forming substrate is pressed out of the pores 54, thereby forming a fine-particle aerosol. Of course, it will be appreciated that in other embodiments, the diaphragm member 4 may include both the glass sheet 42 and the metal diaphragm 43.

Referring to fig. 1, 4 and 5, a plurality of first limit lugs 6 are disposed on the periphery of the metal plate 5, and each first limit lug 6 has a first connection end 63 for being fixed on the metal plate 5 and a first free end 64 extending to the side of the piezoelectric ceramic plate 1. When the metal plate 5 is installed on the surface of the second electrode layer 3 departing from the piezoelectric ceramic piece 1, the plurality of first limit lugs 6 on the metal plate 5 can respectively abut against the outer peripheral surface of the piezoelectric ceramic piece 1. Thus, since the piezoelectric ceramic sheet 1 is held between the first limit lugs 6, it can play a good role in limiting when the piezoelectric ceramic and the metal sheet 5 are adhered, and can limit the offset of the metal sheet 5 relative to the piezoelectric ceramic within an allowable deviation range. That is to say, because, the first spacing ears 6 on the metal sheet 5 can play the position constraint effect to the piezoceramics piece 1 in the circumferential direction, when the piezoceramics piece 1 is limited between a plurality of first spacing ears 6, the eccentric phenomenon can be reduced or even avoided to take place between the metal sheet 5 and the piezoceramics piece 1, thereby make metal sheet 5 and piezoceramics piece 1 keep centering counterpoint all the time, on the one hand avoid micropore 54 to appear fog and not form the hydrops in central point on one side of decentered, on the other hand avoid the central micropore 54 of metal sheet 5 vibration shrink range inhomogeneous and influence atomization efficiency all around, on the other hand can prevent piezoceramics piece 1 peripheral size grow and produce anomalous deformation again.

Compared with the prior art, the ultrasonic atomization sheet provided by the embodiment of the utility model has the advantages that the plurality of first limiting lugs 6 are arranged on the periphery of the metal plate 5, when the metal plate 5 is arranged on one surface of the second electrode layer 3, which is far away from the piezoelectric ceramic sheet 1, each first limiting lug 6 can play a supporting and restraining role on the piezoelectric ceramic sheet 1 from the periphery of the piezoelectric ceramic sheet 1 to the central position of the piezoelectric ceramic sheet 1, so that the piezoelectric ceramic sheet 1 is limited among the plurality of first limiting lugs 6 of the metal plate 5, the offset of the metal plate 5 relative to the piezoelectric ceramic is limited in an allowable deviation range, the metal plate 5 and the piezoelectric ceramic sheet 1 are effectively prevented from being seriously eccentric, the metal plate 5 and the piezoelectric ceramic sheet 1 can be always kept in central alignment, and the stable reliability of the atomization work of the ultrasonic atomization sheet is improved.

Referring to fig. 1, 4 and 6, in some embodiments, a plurality of first limit lugs 6 are disposed at intervals along the circumferential direction of the metal plate 5. When the ultrasonic atomization sheet works, the plurality of first limit lugs 6 arranged at intervals along the circumferential direction of the metal sheet 5 act a supporting and restraining effect on the piezoelectric ceramic sheet 1 from the periphery of the piezoelectric ceramic sheet 1 to the central position of the piezoelectric ceramic sheet 1, so that the piezoelectric ceramic sheet 1 can be stably limited between the plurality of first limit lugs 6 of the metal sheet 5. It should be understood that the plurality of first limit lugs 6 means that the number of the limit lugs can be two or more than three, and the number of the limit lugs can be reasonably set according to the actual size or actual use requirement of the ultrasonic atomization sheet, and is not limited herein. Referring to fig. 4, in some embodiments, in order to further enhance the limiting effect of the first limiting lugs 6 on the piezoelectric ceramic plate 1 and equalize the overall stress of the piezoelectric ceramic plate 1, so as to accurately limit the offset of the metal plate 5 relative to the piezoelectric ceramic plate 1 within an allowable deviation range, the spacing between each two adjacent first limiting lugs 6 is equal in the plurality of first limiting lugs 6 arranged at intervals along the circumferential direction of the metal plate 5.

Referring to fig. 5 and 9, in some embodiments, the first position-limiting lug 6 includes a first connecting plate 61 and a first position-limiting plate 62 connected to the first connecting plate 61, the first connecting plate 61 has a first connecting end 63 for fixing to the metal plate 5, and the first position-limiting plate 62 has a first suspending end 64 extending to a side of the piezoceramic wafer 1 so that the first position-limiting plate 62 can support an outer peripheral surface of the piezoceramic wafer 1. The first limiting plate 62 connected to the first connecting plate 61 can be suspended on the metal plate 5 only by the first connecting end 63 being fixedly connected to the metal plate 5. Because the first suspended end 64 of the first limiting plate 62 extends to the side of the piezoelectric ceramic plate 1, the suspended first limiting plate 62 can be well abutted against the outer peripheral surface of the piezoelectric ceramic plate 1, so as to more accurately limit the offset of the metal plate 5 relative to the piezoelectric ceramic plate 1 within the allowable deviation range.

Referring to fig. 5 and 9, in some embodiments, the metal plate 5 has a first stress releasing notch formed on the outer periphery thereof to avoid the first connecting plate 61, the first connecting end 63 of the first connecting plate 61 is fixedly connected to the metal plate 5, and the first connecting plate 61 is located in the first stress releasing notch. Due to the arrangement of the structure, the first stress release groove 65 for releasing stress is formed between the corresponding side edge of the first connecting plate 61 and the metal plate 5, so that the forming of the first connecting plate 61 and the metal plate 5 is facilitated, and the defect of concentrated stress formed on the piezoelectric ceramic piece 1 due to the unevenness of the metal plate 5 or the bent arc surface of the first connecting plate 61 can be overcome. Further, in order to enable the first limiting plate 62 to be well abutted against the outer peripheral surface of the piezoelectric ceramic plate 1 and reduce the formation of concentrated stress on the piezoelectric ceramic plate 1, an included angle between the first limiting plate 62 and the first connecting plate 61 is a right angle or an acute angle. Further, referring to fig. 5 and 9, in order to enhance the stability of the overall structure of the first limiting lug 6, the first limiting plate 62 can more stably abut against the outer peripheral surface of the piezoelectric ceramic plate 1, and the first limiting plate 62 is formed by bending one end of the first connecting plate 61 departing from the first connecting end 63 toward the piezoelectric ceramic plate 1.

Referring to fig. 5 and 9, in some embodiments, the first connecting plate 61 and the metal plate 5 are integrally formed, and the first connecting plate 61 and the metal plate 5 are located on the same plane, so as to overcome the defect of concentrated stress on the piezoelectric ceramic plate 1 caused by unevenness of the metal plate 5 or unevenness of a bent arc surface of the first connecting plate 61.

Referring to fig. 2, 7 and 8 in combination, in some embodiments, the metal plate 5 includes an annular protection sheet 51 covering a side of the second electrode layer 3 facing away from the piezoelectric ceramic plate 1, and a membrane portion 52 disposed at a second annular hole 53 of the annular protection sheet 51, the microporous hole 54 is disposed in the membrane portion 52, and the membrane portion 52 is further provided with a first tab 8 for electrically connecting with an external power supply device. When in use, the second surface 13 of the piezoceramic wafer 1 can be applied with voltage by the power supply device by only welding the lead wire to the first tab 8. The metal diaphragm 43 is provided with a second lug 9 for electrical connection with an external power supply device. In use, a voltage can be applied to the first side 12 of the piezoceramic wafer 1 by means of the power supply device by simply soldering the lead wire to the second tab 9.

Referring to fig. 6, 7 and 8, in some embodiments, when the diaphragm member 4 is a metal diaphragm 43, the metal diaphragm 43 covers a surface of the first electrode layer 2 away from the piezoelectric ceramic plate 1, the metal diaphragm 43 is provided with a plurality of second limit lugs 7, and each of the second limit lugs 7 has a second connection end 73 for being fixed to the metal diaphragm 43 and a second suspension end 74 extending to a side of the piezoelectric ceramic plate 1 so that the second limit lug 7 can be supported by the outer peripheral surface of the piezoelectric ceramic plate 1. When the metal plate 5 is mounted on the surface of the first electrode layer 2 departing from the piezoelectric ceramic plate 1, each second limiting lug 7 can play a role in supporting and restraining the piezoelectric ceramic plate 1 from the periphery of the piezoelectric ceramic plate 1 towards the central position of the piezoelectric ceramic plate 1, so that the piezoelectric ceramic plate 1 is limited among the second limiting lugs 7 of the metal membrane 43, the offset of the metal membrane 43 relative to the piezoelectric ceramic is limited within an allowable deviation range, the metal membrane 43 and the piezoelectric ceramic plate 1 are effectively prevented from being seriously eccentric, the metal plate 5 and the piezoelectric ceramic plate 1 can always keep centered alignment, the stable reliability of atomization work of the ultrasonic atomization plate can be improved, and the increase of the peripheral size and irregular deformation of the piezoelectric ceramic plate 1 can be effectively prevented.

Referring to fig. 6 and 8, in some embodiments, a plurality of second stopper lugs 7 are disposed at intervals along the circumferential direction of the metal diaphragm 43. When the ultrasonic atomization sheet works, the second limit lugs 7 act a supporting and restraining effect on the piezoelectric ceramic sheet 1 from the periphery of the piezoelectric ceramic sheet 1 to the central position of the piezoelectric ceramic sheet 1, and the piezoelectric ceramic sheet 1 can be stably limited among the second limit lugs 7 of the metal diaphragm 43. It is understood that the plurality of second limit lugs 7 means that the number of the limit lugs can be two or more than three, and the number of the limit lugs can be reasonably set according to the actual size or actual use requirement of the ultrasonic atomization sheet, and is not limited herein. In order to further enhance the limiting effect of the second limiting lugs 7 on the piezoelectric ceramic piece 1 and balance the stress of the piezoelectric ceramic piece 1 as a whole, the distance between every two adjacent second limiting lugs 7 is equal in the second limiting lugs 7 arranged at intervals along the circumferential direction of the metal plate 5.

Referring to fig. 10, in some embodiments, the second limiting lug 7 includes a second connecting plate 71 and a second limiting plate 72 connected to the second connecting plate 71, the second connecting plate 71 has a second connecting end 73 for fixing to the metal diaphragm 43, and the second limiting plate 72 has a second suspending end 74 extending to the side of the piezoceramic wafer 1 so that the second limiting plate 72 can abut against the outer peripheral surface of the piezoceramic wafer 1. The second limiting plate 72 connected to the second connecting plate 71 can be suspended on the metal diaphragm 43 only by fixedly connecting the second connecting end 73 to the metal diaphragm 43. Because the second suspended end 74 of the second limiting plate 72 extends to the side of the piezoelectric ceramic plate 1, the suspended second limiting plate 72 can be well abutted against the outer peripheral surface of the piezoelectric ceramic plate 1, so that the offset of the metal plate 5 relative to the piezoelectric ceramic plate 1 can be more accurately limited within an allowable deviation range, and the increase of the peripheral dimension of the piezoelectric ceramic plate 1 and the generation of irregular deformation can be prevented.

Referring to fig. 10, in some embodiments, a second stress releasing notch that is free from the second connecting plate 71 is formed on the outer periphery of the metal diaphragm 43, the second connecting end 73 of the second connecting plate 71 is fixedly connected to the metal diaphragm 43, and the second connecting plate 71 is located in the second stress releasing notch, so that a second stress releasing groove 75 for releasing stress is formed between the corresponding side edge of the second connecting plate 71 and the metal diaphragm 43. The arrangement of the structure is not only beneficial to the molding of the second connecting plate 71 and the metal diaphragm 43, but also can overcome the defect of concentrated stress formed on the piezoelectric ceramic piece 1 due to the unevenness of the metal diaphragm 43 or the unevenness caused by the bending cambered surface of the second connecting plate 71. Further, in order to enable the second limiting plate 72 to be well abutted against the outer peripheral surface of the piezoelectric ceramic plate 1 and reduce the formation of concentrated stress on the piezoelectric ceramic plate 1, an included angle between the second limiting plate 72 and the second connecting plate 71 is a right angle or an acute angle. Further, in order to enhance the stability of the overall structure of the second limiting lug 7, the second limiting plate 72 can more stably abut against the outer peripheral surface of the piezoelectric ceramic plate 1, and the second limiting plate 72 is formed by bending one end of the second connecting plate 71 departing from the second connecting end 73 toward the piezoelectric ceramic plate 1.

Referring to fig. 10, in some embodiments, the second connecting plate 71 and the metal diaphragm 43 are integrally formed, and the second connecting plate 71 and the metal diaphragm 43 are located on the same plane, so as to overcome the defect of concentrated stress on the piezoelectric ceramic plate 1 caused by the unevenness of the metal plate 5 or the bending arc surface of the second connecting plate 71.

In some of these embodiments, the ultrasonic atomization sheet further comprises a first conductive glue layer for bonding the first electrode layer 2 and the metal membrane 43. After the first electrode layer 2 is plated or printed on the first surface 12 of the piezoelectric ceramic sheet 1, a conductive adhesive is coated on the surface of the first electrode layer 2 departing from the piezoelectric ceramic sheet 1, the metal membrane 43 is combined on the first electrode layer 2, and a first conductive adhesive layer is formed between the first electrode layer 2 and the metal membrane 43. Similarly, referring to fig. 3 and 8 in combination, in some embodiments, the ultrasonic atomization sheet further includes a second conductive adhesive layer 10 for bonding the second electrode layer 3 and the metal sheet 5. After the second electrode layer 3 is plated or printed on the second surface 13 of the piezoelectric ceramic sheet 1, a conductive adhesive is coated on the surface of the second electrode layer 3 departing from the piezoelectric ceramic sheet 1, the metal sheet 5 is combined on the second electrode layer 3, and a second conductive adhesive layer 10 is formed between the second electrode layer 3 and the metal sheet 5. It should be noted that the first conductive adhesive layer and/or the second conductive adhesive layer 10 may be, but not limited to, a conductive silver adhesive layer, that is, the conductive adhesive may be, but not limited to, a conductive silver adhesive layer, for example, the conductive adhesive may also be a conductive copper adhesive layer.

The embodiment of the utility model also provides an atomizer which comprises the ultrasonic atomization sheet provided by any one of the embodiments. Since the atomizer has all the technical features of the ultrasonic atomizing sheet provided in any one of the above embodiments, it has the same technical effects as the above ultrasonic atomizing sheet.

The embodiment of the utility model also provides an aerosol generating device which comprises the ultrasonic atomization sheet or the atomizer provided by any one of the embodiments. Since the aerosol generating device has all the technical features of the ultrasonic atomization sheet or the atomizer provided in any one of the above embodiments, it has the same technical effects as the ultrasonic atomization sheet or the atomizer.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An ultrasonic atomization sheet, comprising:

the center of the piezoelectric ceramic piece is provided with a through hole in a penetrating manner, and the two ends of the piezoelectric ceramic piece along the axial direction of the through hole are respectively provided with a first surface and a second surface;

a first electrode layer stacked on the first surface;

a second electrode layer stacked on the second surface;

the diaphragm piece is arranged on one surface of the first electrode layer, which is far away from the piezoelectric ceramic piece; and

the metal sheet is arranged on one surface of the second electrode layer, which is far away from the piezoelectric ceramic piece, and is electrically connected with the second electrode layer, and micropores are formed in the positions, corresponding to the through holes, of the metal sheet;

the periphery of the metal plate is provided with a plurality of first limiting lugs, and each first limiting lug is provided with a first connecting end used for being fixed on the metal plate and a first suspending end extending to the side of the piezoelectric ceramic piece so that the first limiting lug can abut against the outer peripheral surface of the piezoelectric ceramic piece.

2. The ultrasonic atomization sheet of claim 1 wherein a plurality of the first retaining tabs are spaced circumferentially along the sheet metal piece.

3. The ultrasonic atomization sheet of claim 2 wherein the spacing between adjacent first limit ears is equal.

4. The ultrasonic atomization sheet of claim 1 wherein the first limit tab comprises a first connection plate and a first limit plate connected to the first connection plate, the first connection plate having the first connection end, the first limit plate having the first free end.

5. The ultrasonic atomization sheet of claim 4, wherein a first stress relief notch is formed in an outer periphery of the metal plate to avoid the first connection plate, the first connection end of the first connection plate is fixedly connected to the metal plate, and the first connection plate is located in the first stress relief notch, so that a first stress relief groove for relieving stress is formed between the corresponding side edge of the first connection plate and the metal plate.

6. The ultrasonic atomization sheet of claim 4, wherein an angle between the first limiting plate and the first connecting plate is a right angle or an acute angle.

7. The ultrasonic atomization plate of claim 4, wherein the first limiting plate is formed by bending an end of the first connection plate away from the first connection end towards the piezoceramic plate.

8. The ultrasonic atomization sheet of claim 7 wherein the first connection plate is integrally formed with the metal sheet, and the first connection plate and the metal sheet are located on the same plane.

9. An atomizer characterized by comprising an ultrasonic atomizing plate according to any one of claims 1 to 8.

10. An aerosol generating device comprising an ultrasonic nebulization patch according to any of claims 1 to 8 or an atomizer according to claim 9.

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