Camera cleaning device and camera

Abstract

The present application relates to the field of camera cleaning technology, and proposes a camera cleaning device and a camera. The camera cleaning device includes a shell, a piezoelectric ceramic ring and a lens. The shell has a receiving groove, the lens is fixed on the shell and covers the opening of the receiving groove, and an annular groove is provided on the side of the lens facing the receiving groove; the bottom wall of the receiving groove is provided with a through hole for the camera lens to be exposed, the piezoelectric ceramic ring is in the receiving groove, the first end of the piezoelectric ceramic ring is connected to the edge of the through hole, and the second end of the piezoelectric ceramic ring is glued or welded to the annular groove. The above-mentioned camera cleaning device increases the connection area between the second end of the piezoelectric ceramic ring and the lens by setting an annular groove on the side of the lens facing the receiving groove, and glues or welds the second end of the piezoelectric ceramic ring to the annular groove, thereby improving the connection reliability between the second end of the piezoelectric ceramic ring and the lens, so as to ensure that the camera cleaning device can work normally for a long time.

Description

Technical Field

[0001] The present application relates to the technical field of camera cleaning, and in particular to a camera cleaning device and a camera. Background Art

[0002] Whether in the automotive industry or the security field, cameras are undoubtedly an important pair of eyes, and they are becoming more and more important. However, in normal use, we will encounter various application scenarios that are not conducive to camera display: for example, muddy road conditions, rainy road conditions, dusty road conditions, rainy and snowy road conditions, and frost environments. In these scenarios, the camera will inevitably be dirty, blocked, etc., which will cause poor image display and affect normal use. Therefore, a camera cleaning device is needed to clean the camera.

[0003] At present, the camera cleaning device generally includes a base, a piezoelectric ceramic ring, a lens, a sealing ring and a gland. One end of the piezoelectric ceramic ring is supported on the base, and the other end of the piezoelectric ceramic ring is bonded to the lens by glue. The sealing ring is between the lens and the gland, and the gland is connected to the base. When powered on, the piezoelectric ceramic ring contracts or expands to drive the lens to vibrate, thereby cleaning the dirt on the lens.

[0004] However, the end of the piezoelectric ceramic ring is usually directly bonded to the surface of the lens by glue, resulting in poor connection reliability between the end of the piezoelectric ceramic ring and the lens. During long-term high-frequency operation, the end of the piezoelectric ceramic ring and the lens may easily move relative to each other, affecting normal operation. Utility Model Content

[0005] In view of this, an embodiment of the present application provides a camera cleaning device and a camera to solve the problem of poor connection reliability between the end of the piezoelectric ceramic ring and the lens.

[0006] The first aspect of the present application proposes a camera cleaning device, comprising a shell, a piezoelectric ceramic ring and a lens, the shell having a receiving groove, the lens being fixed on the shell and covering the opening of the receiving groove, the lens being provided with an annular groove on the side facing the receiving groove; the bottom wall of the receiving groove being provided with a through hole for exposing the lens of the camera, the piezoelectric ceramic ring being located in the receiving groove, the first end of the piezoelectric ceramic ring being connected to the edge of the through hole, and the second end of the piezoelectric ceramic ring being glued or welded to the annular groove.

[0007] The camera cleaning device provided in the embodiment of the present application has the following beneficial effects: by setting an annular groove on the side of the lens facing the accommodating groove, and gluing or welding the second end of the piezoelectric ceramic ring into the annular groove, the connection area between the second end of the piezoelectric ceramic ring and the lens is increased, and at the same time, the annular groove can limit the piezoelectric ceramic ring in the radial direction of the piezoelectric ceramic ring, thereby improving the connection reliability between the second end of the piezoelectric ceramic ring and the lens. In long-term high-frequency operation, the second end of the piezoelectric ceramic ring is not easy to move relative to the lens, thereby ensuring that the camera cleaning device can work normally for a long time.

[0008] In some embodiments, the piezoelectric ceramic rings are provided in plurality, the annular grooves are provided in plurality and are arranged in one-to-one correspondence with the piezoelectric ceramic rings, and the through holes are provided in plurality and are arranged in one-to-one correspondence with the piezoelectric ceramic rings.

[0009] The beneficial effect of adopting the above technical solution is that multiple piezoelectric ceramic rings can drive the lenses at the same time, so that the camera cleaning device is suitable for cleaning multi-eye cameras (for example, binocular cameras), that is, it is suitable for situations where the lens area is larger.

[0010] In some embodiments, the plurality of piezoelectric ceramic rings are arranged in a straight line.

[0011] In some embodiments, an annular step is provided on the shell, and the edge of the lens is fixed on the annular step.

[0012] The beneficial effects of adopting the above technical solution are: the connection area between the edge of the lens and the shell can be increased, and the annular step can also limit the lens in the radial direction of the piezoelectric ceramic ring to ensure the stability of the lens fixedly connected to the shell.

[0013] In some embodiments, a first flexible glue is provided between the edge of the lens and the annular step.

[0014] The beneficial effects of adopting the above technical solution are as follows: the first flexible adhesive can play a buffering role, avoiding the rigid contact between the edge of the lens and the shell, which is beneficial to the vibration of the lens; at the same time, the first flexible adhesive also plays a sealing role.

[0015] In some embodiments, a second flexible glue is provided between the first end of the piezoelectric ceramic ring and the edge of the through hole.

[0016] The beneficial effect of adopting the above technical solution is that the second flexible glue can play a buffering role to avoid the first end of the piezoelectric ceramic ring from rigidly contacting the edge of the through hole, which is beneficial to the vibration of the lens.

[0017] In some embodiments, a positive spring sheet and a negative spring sheet are provided on the bottom wall of the accommodating groove, one of the positive spring sheet and the negative spring sheet abuts against the inner wall of the piezoelectric ceramic ring, and the other of the positive spring sheet and the negative spring sheet abuts against the outer wall of the piezoelectric ceramic ring.

[0018] The beneficial effect of adopting the above technical solution is as follows: since the positive spring piece and the negative spring piece respectively abut the inner wall and the outer wall of the piezoelectric ceramic ring to improve the contact stability between the positive spring piece and the negative spring piece and the piezoelectric ceramic ring, the driving signal is transmitted to the piezoelectric ceramic ring through the positive spring piece and the negative spring piece to ensure the stability of signal transmission.

[0019] In some embodiments, the positive spring sheet has a first protrusion, the negative spring sheet has a second protrusion, one of the first protrusion and the second protrusion abuts against the inner wall of the piezoelectric ceramic ring, and the other of the first protrusion and the second protrusion abuts against the outer wall of the piezoelectric ceramic ring.

[0020] The beneficial effect of adopting the above technical solution is that the contact stability between the positive and negative spring pieces and the piezoelectric ceramic ring can be further improved, thereby ensuring the stability of signal transmission.

[0021] In some embodiments, the shell includes a surrounding frame and a bottom plate, the bottom plate is fixedly connected to one end of the surrounding frame so that the bottom plate and the surrounding frame form the accommodating groove, and the through hole is provided on the bottom plate.

[0022] The beneficial effect of adopting the above technical solution is that since the shell includes two parts, the surrounding frame and the bottom plate, it is convenient to process the shell and also convenient to install various components in the receiving groove of the shell.

[0023] A second aspect of the present application provides a camera, which includes the camera cleaning device as described in the first aspect.

[0024] The camera adopts any one or more embodiments of the above-mentioned camera cleaning device, and thus has the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic diagram of the structure of a camera cleaning device provided in some embodiments of the present application;

[0028] Figure 2 yes Figure 1 The structural schematic diagram of the camera cleaning device in the AA direction shown;

[0029] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle lens;

[0030] Figure 4 yes Figure 1 An exploded view of the camera cleaning device is shown;

[0031] Figure 5 yes Figure 4 An enlarged view of the camera cleaning device shown at B;

[0032] Figure 6 yes Figure 4 Schematic diagram of the structure where the medium-pressure electric ceramic ring is installed on the base plate.

[0033] The meanings of the marks in the figure are:

[0034] 10. Camera cleaning device;

[0035] 11. housing; 111. surrounding frame; 1111. annular step; 112. bottom plate; 1121. through hole;

[0036] 12. piezoelectric ceramic ring; 121. first end; 122. second end;

[0037] 13. lens; 131. annular groove;

[0038] 14. Receiving tank;

[0039] 15. positive electrode spring; 151. first protrusion;

[0040] 16. Negative electrode spring; 161. Second protrusion. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] The first embodiment of the present application provides a camera cleaning device for removing dust, rain and frost from the surface of camera lenses in the fields of vehicle-mounted, security and the like. Figure 1 and Figure 2 The camera cleaning device 10 includes a housing 11, a piezoelectric ceramic ring 12 and a lens 13. The housing 11 has a receiving groove 14, the lens 13 is fixed on the housing 11 and covers the opening of the receiving groove 14, and an annular groove 131 is provided on the side of the lens 13 facing the receiving groove 14; a through hole 1121 is provided on the bottom wall of the receiving groove 14 for the camera lens to be exposed, the piezoelectric ceramic ring 12 is in the receiving groove 14, the first end 121 of the piezoelectric ceramic ring 12 is connected to the edge of the through hole 1121, and the second end 122 of the piezoelectric ceramic ring 12 is glued or welded to the annular groove 131.

[0050] The shape of the receiving groove 14 is not limited in the present application. For example, the shape of the receiving groove 14 can be waist-shaped, rectangular, circular, elliptical, etc.

[0051] It can be understood that the lens 13 can be a glass lens, a plastic lens, etc.

[0052] The lens 13 is fixed on the housing 11 and covers the opening of the receiving groove 14 , that is, external dirt will not enter the receiving groove 14 , thereby avoiding affecting the normal operation of the piezoelectric ceramic ring 12 .

[0053] Optionally, the shape of the lens 13 is the same as the shape of the receiving groove 14. For example, the shape of the receiving groove 14 is waist-shaped, and correspondingly, the shape of the lens 13 is waist-shaped; the shape of the receiving groove 14 is rectangular, and correspondingly, the shape of the lens 13 is rectangular; the shape of the receiving groove 14 is circular, and correspondingly, the shape of the lens 13 is circular; the shape of the receiving groove 14 is elliptical, and correspondingly, the shape of the lens 13 is elliptical. Of course, the shape of the lens 13 and the shape of the receiving groove 14 can also be different.

[0054] The side of the lens 13 facing the receiving groove 14 is provided with an annular groove 131. Figure 3As shown, the shape of the annular groove 131 is a circular ring. Of course, the shape of the annular groove 131 can also be an elliptical ring. Among them, the depth of the annular groove 131 can be designed as needed.

[0055] Optionally, the number of the annular grooves 131 is the same as the number of the piezoelectric ceramic rings 12. For example, if there is one annular groove 131, then there is one piezoelectric ceramic ring 12; if there are multiple annular grooves 131, then there are multiple piezoelectric ceramic rings 12.

[0056] The bottom wall of the receiving groove 14 is provided with a through hole 1121 for exposing the lens of the camera. Figure 4 As shown, the through hole 1121 is in the shape of a circular ring. Of course, the through hole 1121 may also be in the shape of an elliptical ring.

[0057] Optionally, the number of through holes 1121 is the same as the number of piezoelectric ceramic rings 12. For example, if there is one through hole 1121, then correspondingly, there is one piezoelectric ceramic ring 12; if there are multiple through holes 1121, then correspondingly, there are multiple piezoelectric ceramic rings 12.

[0058] Optionally, the piezoelectric ceramic ring 12 is in the shape of a ring, wherein the first end 121 and the second end 122 of the piezoelectric ceramic ring 12 are respectively the axial ends of the piezoelectric ceramic ring 12. The diameter of the piezoelectric ceramic ring 12 is larger than the diameter of the through hole 1121 to avoid affecting the camera shooting.

[0059] The first end 121 of the piezoelectric ceramic ring 12 is connected to the edge of the through hole 1121. It can be understood that the first end 121 of the piezoelectric ceramic ring 12 can be fixedly connected to the edge of the through hole 1121; or, the first end 121 of the piezoelectric ceramic ring 12 can abut the edge of the through hole 1121, that is, the first end 121 of the piezoelectric ceramic ring 12 is in contact with the edge of the through hole 1121 but not fixed.

[0060] It can be understood that the second end 122 of the piezoelectric ceramic ring 12 can be glued and connected to the annular groove 131; or, the second end 122 of the piezoelectric ceramic ring 12 can be welded and connected to the annular groove 131. In this case, the lens 13 is made of glass, and welding of ceramic and glass is an existing mature process and will not be described in detail here.

[0061] The piezoelectric ceramic ring 12 can work in the ultrasonic frequency band without any noise.

[0062] The camera cleaning device 10 provided in the embodiment of the present application has the following beneficial effects: by setting an annular groove 131 on the side of the lens 13 facing the accommodating groove 14, and gluing or welding the second end 122 of the piezoelectric ceramic ring 12 to the annular groove 131, the connection area between the second end 122 of the piezoelectric ceramic ring 12 and the lens 13 is increased, and at the same time, the annular groove 131 can limit the piezoelectric ceramic ring 12 in the radial direction of the piezoelectric ceramic ring 12, thereby improving the connection reliability between the second end 122 of the piezoelectric ceramic ring 12 and the lens 13. In long-term high-frequency operation, the second end 122 of the piezoelectric ceramic ring 12 is not easy to move relative to the lens 13, thereby ensuring that the camera cleaning device 10 can work normally for a long time.

[0063] It should be noted that the dirt on the lens 13 can be identified through the change of the resonant frequency, and then the piezoelectric ceramic ring 12 has different vibration modes at different specific frequencies, which drives the different nodes of the lens 13 to vibrate to achieve the purpose of cleaning.

[0064] In some embodiments, a plurality of piezoelectric ceramic rings 12 are provided, a plurality of annular grooves 131 are provided and arranged one-to-one with the piezoelectric ceramic rings 12 , and a plurality of through holes 1121 are provided and arranged one-to-one with the piezoelectric ceramic rings 12 .

[0065] Optionally, see Figure 3 and Figure 4 , there are two piezoelectric ceramic rings 12, and there are two annular grooves 131 and through holes 1121. One piezoelectric ceramic ring 12 corresponds to one annular groove 131 and one through hole 1121, and the other piezoelectric ceramic ring 12 corresponds to the other annular groove 131 and the other through hole 1121. Of course, the number of piezoelectric ceramic rings 12, annular grooves 131 and through holes 1121 can also be three, four, five, etc.

[0066] Based on the above solution, multiple piezoelectric ceramic rings 12 can drive the lens 13 at the same time, so that the camera cleaning device 10 is suitable for cleaning multi-eye cameras (for example, binocular cameras), that is, it is suitable for situations where the area of ​​the lens 13 is larger.

[0067] In other embodiments, the piezoelectric ceramic ring 12 , the annular groove 131 and the through hole 1121 may also be provided in one to be suitable for a monocular camera.

[0068] Please refer to Figure 4 In some embodiments, the plurality of piezoelectric ceramic rings 12 are arranged in a straight line.

[0069] Optionally, the number of the piezoelectric ceramic rings 12 is two, and the two piezoelectric ceramic rings 12 are arranged in a straight line; correspondingly, the number of the annular grooves 131 is two, and the arrangement direction of the two annular grooves 131 is the same as the arrangement direction of the two piezoelectric ceramic rings 12; correspondingly, the number of the through holes 1121 is two, and the arrangement direction of the two through holes 1121 is the same as the arrangement direction of the two piezoelectric ceramic rings 12. Of course, the number of the piezoelectric ceramic rings 12 can also be three, and the three piezoelectric ceramic rings 12 are arranged in a straight line.

[0070] In other embodiments, the number of the piezoelectric ceramic rings 12 may be three, and the three piezoelectric ceramic rings 12 are arranged in a “pin” shape.

[0071] Please refer to Figure 2 and Figure 4 In some embodiments, an annular step 1111 is provided on the housing 11 , and the edge of the lens 13 is fixed on the annular step 1111 .

[0072] Optionally, the housing 11 includes a surrounding frame 111 and a bottom plate 112 , the surrounding frame 111 and the bottom plate 112 together form a receiving groove 14 , and the annular step 1111 is provided on the surrounding frame 111 .

[0073] It can be understood that the thickness of the lens 13 can be greater than the depth of the annular step 1111, in which case the lens 13 is higher than the surface of the housing 11; or, the thickness of the lens 13 can be equal to the depth of the annular step 1111, in which case the lens 13 is flush with the surface of the housing 11; or, the thickness of the lens 13 can be less than the depth of the annular step 1111, in which case the lens 13 is lower than the surface of the housing 11. The thickness direction of the lens 13 and the depth direction of the annular step 1111 are both the same as the axial direction of the piezoelectric ceramic ring 12.

[0074] Based on the above technical solution, the connection area between the edge of the lens 13 and the shell 11 can be increased. At the same time, the annular step 1111 can also limit the lens 13 in the radial direction of the piezoelectric ceramic ring 12 to ensure the stability of the lens 13 fixedly connected to the shell 11.

[0075] In other embodiments, the annular step 1111 may not be provided on the shell 11 , and the edge of the lens 13 may be fixed on the surface of the shell 11 ; or, the annular step 1111 may not be provided on the shell 11 , but an annular step 1111 may be provided on the edge of the lens 13 .

[0076] In some embodiments, a first flexible adhesive is disposed between the edge of the lens 13 and the annular step 1111 .

[0077] It can be understood that the edge of the lens 13 is fixed to the annular step 1111 of the housing 11 by the first flexible adhesive.

[0078] Based on the above technical solution, the first flexible adhesive can play a buffering role to prevent the edge of the lens 13 from rigidly contacting the housing 11, which is beneficial to the vibration of the lens 13; at the same time, the first flexible adhesive also plays a sealing role.

[0079] In other embodiments, the edge of the lens 13 can be snap-fitted and fixed on the annular step 1111; wherein a sealing ring is provided between the lens 13 and the annular step 1111 to ensure sealing.

[0080] In some embodiments, a second flexible glue is disposed between the first end 121 of the piezoelectric ceramic ring 12 and the edge of the through hole 1121 .

[0081] It can be understood that the first end 121 of the piezoelectric ceramic ring 12 is fixed on the edge of the through hole 1121 by the second flexible glue.

[0082] Based on the above technical solution, the second flexible glue can play a buffering role to avoid the first end 121 of the piezoelectric ceramic ring 12 from rigidly contacting the edge of the through hole 1121 , which is beneficial to the vibration of the lens 13 .

[0083] In other embodiments, the first end 121 of the piezoelectric ceramic ring 12 can freely contact the edge of the through hole 1121 .

[0084] Please refer to Figure 4 and Figure 6 In some embodiments, a positive electrode spring 15 and a negative electrode spring 16 are provided on the bottom wall of the accommodating groove 14, one of the positive electrode spring 15 and the negative electrode spring 16 abuts against the inner wall of the piezoelectric ceramic ring 12, and the other of the positive electrode spring 15 and the negative electrode spring 16 abuts against the outer wall of the piezoelectric ceramic ring 12.

[0085] Optionally, the housing 11 includes a surrounding frame 111 and a bottom plate 112 , the surrounding frame 111 and the bottom plate 112 together form a receiving groove 14 , and the positive electrode spring sheet 15 and the negative electrode spring sheet 16 are disposed on the bottom plate 112 .

[0086] The positive spring piece 15 and the negative spring piece 16 transmit the driving signal to the piezoelectric ceramic ring 12 to achieve the vibration of the piezoelectric ceramic ring 12 , thereby cleaning the dirt on the lens 13 .

[0087] Optionally, two piezoelectric ceramic rings 12 are provided, and correspondingly, two groups of positive spring pieces 15 and negative spring pieces 16 are provided, one group of positive spring pieces 15 and negative spring pieces 16 transmits a driving signal to one of the piezoelectric ceramic rings 12, and the other group of positive spring pieces 15 and negative spring pieces 16 transmits a driving signal to the other piezoelectric ceramic ring 12.

[0088] It can be understood that the positive spring piece 15 can be abutted against the inner wall of the piezoelectric ceramic ring 12, and the negative spring piece 16 can be abutted against the outer wall of the piezoelectric ceramic ring 12; or, the positive spring piece 15 can be abutted against the outer wall of the piezoelectric ceramic ring 12, and the negative spring piece 16 can be abutted against the inner wall of the piezoelectric ceramic ring 12.

[0089] Based on the above technical solution, since the positive spring piece 15 and the negative spring piece 16 respectively abut the inner wall and the outer wall of the piezoelectric ceramic ring 12 to improve the stability of the contact between the positive spring piece 15 and the negative spring piece 16 and the piezoelectric ceramic ring 12, the driving signal is transmitted to the piezoelectric ceramic ring 12 through the positive spring piece 15 and the negative spring piece 16 to ensure the stability of signal transmission.

[0090] In other embodiments, the positive electrode spring sheet 15 and the negative electrode spring sheet 16 may be replaced by a positive electrode wire and a negative electrode wire, respectively.

[0091] Please refer to Figure 4 and Figure 5 In some embodiments, the positive spring piece 15 has a first protrusion 151, and the negative spring piece 16 has a second protrusion 161. One of the first protrusion 151 and the second protrusion 161 abuts against the inner wall of the piezoelectric ceramic ring 12, and the other of the first protrusion 151 and the second protrusion 161 abuts against the outer wall of the piezoelectric ceramic ring 12.

[0092] It can be understood that the positive spring piece 15 can be abutted against the inner wall of the piezoelectric ceramic ring 12 through the first protrusion 151, and the negative spring piece 16 can be abutted against the outer wall of the piezoelectric ceramic ring 12 through the second protrusion 161; or, the positive spring piece 15 can be abutted against the outer wall of the piezoelectric ceramic ring 12 through the first protrusion 151, and the negative spring piece 16 can be abutted against the inner wall of the piezoelectric ceramic ring 12 through the second protrusion 161.

[0093] Based on the above solution, the contact stability between the positive and negative spring pieces 15 and 16 and the piezoelectric ceramic ring 12 can be further improved, thereby ensuring the stability of signal transmission.

[0094] Please refer to Figure 4 and Figure 5 In some embodiments, the housing 11 includes a frame 111 and a bottom plate 112 . The bottom plate 112 is fixedly connected to one end of the frame 111 so that the bottom plate 112 and the frame 111 form a receiving groove 14 . A through hole 1121 is provided on the bottom plate 112 .

[0095] It can be understood that the surrounding frame 111 and the bottom plate 112 can be fixedly connected by bonding, fastener connection, clamping, welding, etc.

[0096] Based on the above technical solution, since the shell 11 includes two parts, the surrounding frame 111 and the bottom plate 112 , it is convenient to process the shell 11 and also convenient to install various components in the receiving groove 14 of the shell 11 .

[0097] In other embodiments, the housing 11 is an integral structure, that is, the surrounding frame 111 and the bottom plate 112 are integrally formed.

[0098] The second aspect of the present application provides a camera, which includes the camera cleaning device 10 as described in the first aspect, wherein the camera can be installed on a vehicle, or indoors or outdoors.

[0099] The camera adopts any one or more embodiments of the camera cleaning device 10 described above, and thus has the beneficial effects of the above embodiments, which will not be described one by one here.

[0100] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A camera cleaning device, characterized in that: It includes a shell, a piezoelectric ceramic ring and a lens, the shell has a receiving groove, the lens is fixed on the shell and covers the opening of the receiving groove, and the lens is provided with an annular groove on the side facing the receiving groove; the bottom wall of the receiving groove is provided with a through hole for exposing the lens of the camera, the piezoelectric ceramic ring is located in the receiving groove, the first end of the piezoelectric ceramic ring is connected to the edge of the through hole, and the second end of the piezoelectric ceramic ring is glued or welded to the annular groove.

2. The camera cleaning device according to claim 1, characterized in that: There are a plurality of piezoelectric ceramic rings, there are a plurality of annular grooves arranged in one-to-one correspondence with the piezoelectric ceramic rings, and there are a plurality of through holes arranged in one-to-one correspondence with the piezoelectric ceramic rings.

3. The camera cleaning device according to claim 2, characterized in that: The plurality of piezoelectric ceramic rings are arranged in a straight line.

4. The camera cleaning device according to claim 1, characterized in that: The shell is provided with an annular step, and the edge of the lens is fixed on the annular step.

5. The camera cleaning device according to claim 4, characterized in that: A first flexible glue is provided between the edge of the lens and the annular step.

6. The camera cleaning device according to claim 1, characterized in that: A second flexible glue is provided between the first end of the piezoelectric ceramic ring and the edge of the through hole.

7. The camera cleaning device according to any one of claims 1 to 6, characterized in that: A positive spring sheet and a negative spring sheet are provided on the bottom wall of the accommodating groove, one of the positive spring sheet and the negative spring sheet abuts against the inner wall of the piezoelectric ceramic ring, and the other of the positive spring sheet and the negative spring sheet abuts against the outer wall of the piezoelectric ceramic ring.

8. The camera cleaning device according to claim 7, characterized in that: The positive spring sheet has a first protrusion, the negative spring sheet has a second protrusion, one of the first protrusion and the second protrusion abuts against the inner wall of the piezoelectric ceramic ring, and the other of the first protrusion and the second protrusion abuts against the outer wall of the piezoelectric ceramic ring.

9. The camera cleaning device according to any one of claims 1 to 6, characterized in that: The shell comprises a surrounding frame and a bottom plate, wherein the bottom plate is fixedly connected to one end of the surrounding frame so that the bottom plate and the surrounding frame form the accommodating groove, and the bottom plate is provided with the through hole.

10. A camera, characterized in that: Comprising a camera cleaning device as described in any one of claims 1-9.

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