Cleaning device

Abstract

The utility model belongs to camera technical field especially relates to camera cleaning, the utility model provides a kind of cleaning device, comprising: upper shell;Lower shell, it is buckled with upper shell, forms storage cavity, and the storage cavity is provided with lens;Resonator;The resonator includes elastomer and piezoelectric ceramic sheet;The elastomer includes fixed region and vibration region;The direction of fixed region towards upper shell is connected with upper shell, the direction of fixed region towards lower shell is connected with lower shell;The direction of vibration region towards upper shell is connected with lens;The side of piezoelectric ceramic sheet towards upper shell is fixed surface;The side of piezoelectric ceramic sheet towards lower shell is free surface, and it forms movable gap between lower shell;The utility model is directly fixed between upper shell and lower shell by elastomer, one side of piezoelectric ceramic sheet is free surface, and by setting elastic silk part, excitation piezoelectric ceramic sheet multiple vibration mode, realize multidirectional cleaning, improve cleaning effect.

Description

Technical Field

[0001] This utility model belongs to the field of camera technology, specifically relating to camera cleaning, and more particularly to a cleaning device. Background Technology

[0002] In daily life, cameras are being used in an increasing number of scenarios, such as traffic management, retail security, production monitoring, smart homes, and automobiles, where the demand for cameras is growing. Cameras that are exposed to the outdoors for a long time are prone to accumulating dust, grit, and other particles, which can cause the lens to become blurry or obstruct the field of view. Rain, oil stains, or improper use may leave water stains or chemical residues.

[0003] In the prior art, the camera is cleaned using piezoelectric ceramic cleaning technology. The related piezoelectric cleaning device includes a housing, a base, and a piezoelectric vibrator. One end of the piezoelectric ceramic sheet of the piezoelectric vibrator is fixed to an elastomer, and the other end is fixed to the base or other structures. The full effect of its vibration modes is constrained, resulting in an unsatisfactory actual vibration effect of the piezoelectric vibrator.

[0004] Therefore, how to constrain the vibration of piezoelectric ceramic sheets is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one cleaning device to address the technical problem of constrained vibration of piezoelectric ceramic sheets.

[0007] In a first aspect, embodiments of this disclosure provide a cleaning device, comprising: an upper shell; a lower shell, which is fastened to the upper shell to form a receiving cavity, wherein a lens is disposed within the receiving cavity; and a resonator disposed within the receiving cavity on the side of the lens facing the lower shell; the resonator comprises an elastomer and a piezoelectric ceramic sheet; the elastomer comprises a fixed region and a vibrating region; the fixed region is connected to the upper shell in the direction facing the upper shell, and the fixed region is connected to the lower shell in the direction facing the lower shell; the vibrating region is connected to the lens in the direction facing the upper shell; the side of the piezoelectric ceramic sheet facing the upper shell is a fixed surface, which is connected to the vibrating region; the side of the piezoelectric ceramic sheet facing the lower shell is a free surface, which forms an movable gap with the lower shell; wherein the piezoelectric ceramic sheet is adapted to drive the elastomer to deform, thereby causing the lens to vibrate.

[0008] In one alternative embodiment, the outlines of the upper shell and the lower shell are circular or polygonal.

[0009] In one alternative embodiment, a sealing ring is provided on the inner wall of the upper shell, and the sealing ring is connected to the lens on the side facing the lower shell.

[0010] In one optional embodiment, the elastomer is a metal sheet; the fixed region and the vibration region are connected by a plurality of elastic wires, which are bent.

[0011] In one alternative embodiment, the projection of the piezoelectric ceramic sheet in a direction perpendicular to the plane of the lens falls entirely within the projection range of the elastomer fixing region in that direction.

[0012] Secondly, embodiments of this disclosure provide a cleaning device, comprising: a resonator disposed on one side of a lens, the resonator having a circular or polygonal outline; the resonator comprising an elastomer and a piezoelectric ceramic sheet; the elastomer comprising a fixed region and a vibrating region; one side of the vibrating region being connected to the lens; the piezoelectric ceramic sheet having a fixed surface and a free surface; the fixed surface being connected to the vibrating region of the elastomer; the free surface being connected to the vibrating region; wherein the piezoelectric ceramic sheet is adapted to drive the elastomer to deform, thereby causing the lens to vibrate.

[0013] In one optional embodiment, the elastomer is a metal sheet; the fixed area and the vibration area are connected by a plurality of elastic wires, which are bent.

[0014] In one alternative embodiment, the projection of the piezoelectric ceramic sheet in a direction perpendicular to the plane of the lens falls entirely within the projection range of the elastomer fixing region in that direction.

[0015] In one optional embodiment, the resonator is disposed within a receiving cavity formed by the upper and lower shells fastening together; the fixed region is connected to the upper shell in the direction facing the upper shell, and the fixed region is connected to the lower shell in the direction facing the lower shell; the lens is disposed on the side of the resonator facing the upper shell; and a movable gap is formed between the free surface of the piezoelectric ceramic sheet and the lower shell.

[0016] In one alternative embodiment, a sealing ring is provided on the inner wall of the upper shell, and the sealing ring is connected to the lens on the side facing the lower shell.

[0017] The beneficial effects of this utility model are as follows: This utility model provides a cleaning device that directly fixes an elastomer between the upper and lower shells, and sets a fixed surface of a piezoelectric ceramic sheet with the other side being a free surface, forming an movable gap with the lower shell. In other words, one side of the piezoelectric ceramic sheet is an unconstrained surface. This fixing method effectively increases the amplitude generated by the piezoelectric ceramic sheet driving the elastomer, and can better exert the effect of the vibration mode of the piezoelectric ceramic sheet, effectively enhancing the cleaning effect. By setting the elastic wire part, a multi-directional cleaning effect can be achieved, further improving the cleaning effect.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A perspective view of a polygonal cleaning apparatus provided in an embodiment of this disclosure; Figure 2 A perspective cross-sectional view of a polygonal cleaning apparatus provided in an embodiment of this disclosure; Figure 3 A perspective cross-sectional view of a circular cleaning device provided in an embodiment of this disclosure; Figure 4 A schematic diagram showing the separation state of the polygonal upper shell, lower shell, and elastomer provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram showing the separation state of the circular upper shell, lower shell, and elastomer provided in an embodiment of this disclosure.

[0022] In the picture: 1. Top shell; 2. Lower shell; 3. Resonator; 31. Elastic body; 311. Fixed area; 312. Vibration area; 313. Elastic wire part; 32. Piezoelectric ceramic sheet; 321. Fixed surface; 322. Free surface; 33. Movement gap; 4. Sealing ring; 5. Lenses; 6. Storage cavity. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0028] Research has revealed the following drawbacks of existing technologies: When cleaning cameras using piezoelectric ceramic cleaning technology, the related piezoelectric cleaning devices include a housing, a base, and a piezoelectric vibrator. One end of the piezoelectric ceramic sheet of the piezoelectric vibrator is fixed to an elastomer, and the other end is fixed to the base or other structures. The full effectiveness of its vibration modes is constrained, resulting in an unsatisfactory actual vibration effect of the piezoelectric vibrator.

[0029] Therefore, how to constrain the vibration of piezoelectric ceramic sheets is a technical problem that urgently needs to be solved in this field.

[0030] The shortcomings of the above solutions are the result of the utility model inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as contributions made by the utility model inventor to this disclosure.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] like Figures 1 to 3 As shown, some embodiments provide a cleaning device, including: an upper shell 1; the upper shell 1 is one of the main structural and appearance components of the device, which is fastened to the lower shell 2 to form the sealed body of the device, protecting the internal precision components (resonator 3, lens 5) from mechanical damage and environmental (such as dust, moisture) effects. Its outline is designed to be circular or polygonal to adapt to different installation spaces and the shape of the lens 5. The circular shell has uniform stress distribution and good sealing performance; the polygonal shell is easier to fix and position for anti-rotation.

[0034] The lower shell 2 is fastened to the upper shell 1. Together, the lower shell 2 and the upper shell 1 form the storage cavity 6, which is the basic structure of the device. It is usually used as the installation reference surface and fixed to the main body of the equipment. Its design matches the upper shell 1, which together ensures the sealing of the internal cavity and the integrity of the structure.

[0035] The lower shell 2 and the upper shell 1 form a receiving cavity 6, in which a lens 5 is disposed. The key space for accommodating and fixing the lens 5 and the resonator 3 is precisely designed in size and shape to ensure that the lens 5 and the resonator 3 can be reliably fixed, while providing sufficient space (movement gap 33) for the vibrating part of the resonator 3 (especially the free surface 322 of the piezoelectric ceramic sheet 32) to avoid collisions or friction during operation, and to ensure that the vibration energy is efficiently transferred to the lens 5 rather than being absorbed by the shell.

[0036] It should be further explained that the lens 5 is the object to be cleaned and protected by the device. As an optical window, it allows light to pass through. It is directly connected to the vibration area 312 of the resonator 3. The purpose is to directly and without loss transmit the high-frequency micro-amplitude vibration generated by the resonator 3 to the entire surface of the lens, and use inertial force to shake off the contaminants.

[0037] The resonator 3 is located in the cavity 6 on the side of the lens 5 facing the lower shell 2. The resonator 3 is the core driving component of the entire device. Its function is to convert electrical energy into mechanical vibration. It consists of an elastic body 31 and a piezoelectric ceramic sheet 32 ​​to form a vibration system.

[0038] The resonator 3 includes an elastic body 31 and a piezoelectric ceramic sheet 32; the elastic body 31 includes a fixed region 311 and a vibrating region 312; the fixed region 311 is connected to the upper shell 1 in the direction facing the upper shell 1, and the fixed region 311 is connected to the lower shell 2 in the direction facing the lower shell 2; the vibrating region 312 is connected to the lens 5 in the direction facing the upper shell 1.

[0039] Elastomer 31 (commonly referred to as a vibrating plate or metal cantilever).

[0040] Fixed area 311: This area is rigidly clamped between the upper shell 1 and the lower shell 2 and serves as the "anchor point" of the entire vibration system. It provides fixed boundary conditions for vibration, and this double fixation ensures the rigidity and reliability of the connection and prevents energy leakage from here.

[0041] Vibration region 312: This region is suspended and is the core part that generates elastic deformation. One end of it is constrained by the fixed region 311, and the other end is connected to the lens 5. When the piezoelectric ceramic sheet 32 ​​is driven, this region undergoes bending vibration, thereby causing the lens 5 to vibrate.

[0042] The design of the elastomer 31 (such as shape and thickness) directly determines the resonant frequency of the entire system. It needs to be matched with the driving frequency of the piezoelectric ceramic sheet 32 ​​to achieve the best vibration effect. The elastomer 31 is a metal sheet with high elastic limit and fatigue strength: it can withstand millions or even hundreds of millions of high-frequency reciprocating bending without plastic deformation or fracture, so as to efficiently transmit the driving force of the piezoelectric ceramic to the lens 5.

[0043] The piezoelectric ceramic sheet 32 ​​has a fixed surface 321 on the side facing the upper shell 1, which is connected to the vibration area 312; the piezoelectric ceramic sheet 32 ​​has a free surface 322 on the side facing the lower shell 2. The piezoelectric ceramic sheet 32 ​​has a fixed surface 321 and a free surface 322.

[0044] Fixed surface 321: This surface is firmly attached to the vibration area 312 of the elastomer 31. When an alternating voltage is applied to the piezoelectric ceramic sheet 32, it will undergo expansion and contraction along the plane. Since this surface is fixed, its expansion and contraction will be converted into bending stress on the elastomer 31, forcing the elastomer 31 to bend and vibrate. This is the energy input surface.

[0045] Free surface 322: This surface is not rigidly connected to any structure and has an movable gap 33 between it and the lower shell 2. This "free" state is crucial, as it ensures that the piezoelectric ceramic sheet 32 ​​can bend and deform freely during driving without obstruction. If this surface is constrained, vibration will be suppressed, and it will not collide under any vibration state.

[0046] A movable gap 33 is formed between it and the lower shell 2. The movable gap 33 is a key design to ensure that the free surface 322 of the piezoelectric ceramic sheet 32 ​​can vibrate fully and without obstruction. The sufficient gap avoids the vibration energy being absorbed by the lower shell 2 or generating collision noise, and at the same time provides fault tolerance space for vibration amplitude, ensuring the reliability of long-term use.

[0047] The fixed surface 321 of the piezoelectric ceramic sheet 32 ​​is adapted to drive the elastic body 31 to vibrate, so that the lens 5 vibrates. The free surface 322 is adapted to freely move within the movable gap 33. The piezoelectric ceramic sheet 32 ​​is adapted to drive the elastic body 31 to deform, so that the lens 5 vibrates.

[0048] The outlines of the upper shell 1 and the lower shell 2 are circular or polygonal.

[0049] A sealing ring 4 is provided on the inner wall of the upper shell 1. The side of the sealing ring 4 facing the lower shell 2 is connected to the lens 5. The sealing ring 4 is located on the inner wall of the upper shell 1 and presses the lens 5 tightly. Its main function is to seal the cavity 6 with the external environment, preventing dust, moisture, etc. from entering the interior from the joint between the lens 5 and the outer shell, thus protecting the resonator 3 and the circuit components. At the same time, it also provides auxiliary fixation and buffering for the lens 5. The sealing ring 4 can be made of silicone rubber, fluororubber, nitrile rubber, etc. The elastomer 31 includes a metal sheet; the fixed region 311 and the vibration region 312 are connected by a plurality of elastic wires 313, which are bent.

[0050] The projection of the piezoelectric ceramic sheet 32 ​​in the direction perpendicular to the plane of the lens 5 falls completely within the projection range of the fixed region 311 of the elastic body 31 in that direction.

[0051] The driving source (piezoelectric ceramic sheet 32) is entirely located within the area covered by the rigidly fixed region (fixed region 311), rather than on the suspended vibration region 312. The vibration region 312 is lighter (without the added weight of the piezoelectric ceramic sheet), has less inertia, is easier to drive to generate high-frequency vibrations, and has a faster response. The greatest stress and deformation occur at the edge where the piezoelectric ceramic sheet 32 ​​connects to the elastomer 31. Placing the piezoelectric ceramic sheet 32 ​​above the fixed area 311 can make the stress more concentrated in the fixed part with higher strength and stronger constraint, rather than being transmitted to the fragile cantilever part that requires large vibrations, thereby significantly improving the reliability of the resonator 3.

[0052] The piezoelectric ceramic 32 generates driving force through the inverse piezoelectric effect. The optimized elastic body 31 (vibrating plate) converts the driving force into efficient bending vibration, which is then transmitted to the lens 5 to achieve the cleaning function. The upper shell 1 and lower shell 2 provide sealing and protection, and the sealing ring 4 enhances environmental adaptability. The key design of the piezoelectric ceramic sheet 32 ​​being projected within the fixed area 311 ensures that the entire system can achieve efficient and reliable cleaning results.

[0053] Some embodiments provide a cleaning device including: a resonator 3 disposed on one side of a lens 5, the resonator 3 having a circular or polygonal outline; the resonator 3 including an elastic body 31 and a piezoelectric ceramic sheet 32; the elastic body 31 including a fixed region 311 and a vibrating region 312; one side of the vibrating region 312 being connected to the lens 5; the piezoelectric ceramic sheet 32 ​​having a fixed surface 321 and a free surface 322; the fixed surface 321 being connected to the vibrating region 312 of the elastic body 31; the free surface 322 being connected to the vibrating region 312; wherein the fixed surface 321 of the piezoelectric ceramic sheet 32 ​​is adapted to drive the elastic body 31 to vibrate, thereby causing the lens 5 to vibrate, and the free surface 322 is adapted to freely displace.

[0054] The elastomer 31 includes a metal sheet; the fixed region 311 and the vibration region 312 are connected by a plurality of elastic wires 313, which are bent.

[0055] The projection of the piezoelectric ceramic sheet 32 ​​in the direction perpendicular to the plane of the lens 5 falls completely within the projection range of the fixed region 311 of the elastic body 31 in that direction.

[0056] The resonator 3 is set in the cavity 6 formed by the upper shell 1 and the lower shell 2. The fixed area 311 is connected to the upper shell 1 in the direction facing the upper shell 1 and to the lower shell 2 in the direction facing the lower shell 2. The lens 5 is set on the side of the resonator 3 facing the upper shell 1. An movable gap 33 is formed between the free surface 322 of the piezoelectric ceramic sheet 32 ​​and the lower shell 2.

[0057] A sealing ring 4 is provided on the inner wall of the upper shell 1, and the side of the sealing ring 4 facing the lower shell 2 is connected to the lens 5.

[0058] In a preferred embodiment, when the cleaning device is rectangular, the fixed area 311 and the vibration area 312 are connected by a plurality of elastic wires 313, wherein the number of piezoelectric ceramic sheets 32 connected to the elastic body 31 is 1 or 4; when the number of piezoelectric ceramic sheets 32 is 1, the shape of the piezoelectric ceramic sheet is the same as that of the fixed area 311 of the elastic body 31; when the number of piezoelectric ceramic sheets 32 is 4, they are evenly distributed on the four sides, specifically, there are two long sides and two short sides. At this time, the piezoelectric ceramic sheets 32 can generate a variety of vibration modes according to the distribution: 1. 4 piezoelectric ceramic sheets 32 vibrate in phase; 2. 2 long piezoelectric ceramic sheets 32 vibrate in phase; 3. 2 short piezoelectric ceramic sheets 32 vibrate in phase.

[0059] When an alternating voltage is applied, the piezoelectric ceramic will produce high-frequency deformation (stretching or bending), which in turn drives the connected lens to vibrate. The cleaning device with the elastic wire part 313 can control the alternation or continuous vibration of the above three vibration modes during vibration, thereby removing debris from the glass plate from all directions; Micro dust removal: High-frequency vibration (such as 10μm level displacement) causes particles attached to the lens surface to separate from the surface due to inertial force; Liquid removal: Vibration can atomize water droplets or melt ice layers, which are discharged in conjunction with airflow; Non-contact cleaning: Avoids physical friction damage to the lens.

[0060] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0061] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0062] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cleaning device, characterized in that, include: Upper shell (1); The lower shell (2) is fastened to the upper shell (1) to form a storage cavity (6), and a lens (5) is provided in the storage cavity (6). The resonator (3) is located in the housing cavity (6) on the side of the lens (5) facing the lower shell (2); The resonator (3) includes an elastomer (31) and a piezoelectric ceramic sheet (32). The elastic body (31) includes a fixed region (311) and a vibrating region (312). The fixed area (311) is connected to the upper shell (1) in the direction facing the upper shell (1), and the fixed area (311) is connected to the lower shell (2) in the direction facing the lower shell (2); The vibration area (312) is connected to the lens (5) in the direction facing the upper shell (1); The side of the piezoelectric ceramic sheet (32) facing the upper shell (1) is the fixed surface (321), which is connected to the vibration area (312); The side of the piezoelectric ceramic sheet (32) facing the lower shell (2) is a free surface (322), and a movable gap (33) is formed between it and the lower shell (2). Among them, the piezoelectric ceramic sheet (32) is suitable for driving the elastomer (31) to deform so that the lens (5) vibrates.

2. The cleaning device as claimed in claim 1, characterized in that, The outlines of the upper shell (1) and the lower shell (2) are circular or polygonal.

3. The cleaning device as described in claim 1, characterized in that, The inner wall of the upper shell (1) is provided with a sealing ring (4), and the sealing ring (4) is connected to the lens (5) on the side facing the lower shell (2).

4. The cleaning device as claimed in claim 1, characterized in that, The elastomer (31) is a metal sheet; The fixed area (311) and the vibration area (312) are connected by a number of elastic wires (313), which are bent.

5. The cleaning device according to any one of claims 1-4, characterized in that, The projection of the piezoelectric ceramic sheet (32) in a direction perpendicular to the plane of the lens (5) falls completely within the projection range of the fixed region (311) of the elastic body (31) in that direction.

6. A cleaning device, characterized in that, include: A resonator (3) is disposed on one side of the lens (5), and the outline of the resonator (3) is circular or polygonal. The resonator (3) includes an elastomer (31) and a piezoelectric ceramic sheet (32). The elastic body (31) includes a fixed region (311) and a vibrating region (312). One side of the vibration region (312) is connected to the lens (5); The piezoelectric ceramic sheet (32) has a fixed surface (321) and a free surface (322); The fixed surface (321) is connected to the vibration region (312) of the elastic body (31); The free surface (322) is connected to the vibration region (312); Among them, the piezoelectric ceramic sheet (32) is suitable for driving the elastomer (31) to deform so that the lens (5) vibrates.

7. The cleaning device as claimed in claim 6, characterized in that, The elastomer (31) is a metal sheet; The fixed area (311) and the vibration area (312) are connected by a number of elastic wires (313), which are bent.

8. The cleaning device as claimed in claim 7, characterized in that, The projection of the piezoelectric ceramic sheet (32) in a direction perpendicular to the plane of the lens (5) falls completely within the projection range of the fixed region (311) of the elastic body (31) in that direction.

9. The cleaning device as claimed in claim 8, characterized in that, The resonator (3) is disposed in the storage cavity (6) formed by the upper shell (1) and the lower shell (2) fastening together. The fixing area (311) is connected to the upper shell (1) in the direction facing the upper shell (1) and to the lower shell (2) in the direction facing the lower shell (2). The lens (5) is disposed on the side of the resonator (3) facing the upper shell (1). An movable gap (33) is formed between the free surface (322) of the piezoelectric ceramic sheet (32) and the lower shell (2).

10. The cleaning device as claimed in claim 9, characterized in that, The inner wall of the upper shell (1) is provided with a sealing ring (4), and the sealing ring (4) is connected to the lens (5) on the side facing the lower shell (2).

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