A camera cleaning device and vehicle

Abstract

The camera cleaning device provided by the embodiment of the application can utilize the reciprocating swing of the rear rain wiper motor to provide driving force for the driving cam, and convert the rotary driving force into reciprocating linear motion of the transmission member through the special-shaped side surface of the driving cam, so that the transmission member can drive the cleaning assembly to clean the rear camera reciprocatingly. Therefore, the camera cleaning device can clean the rear camera through a pure mechanical structure without integrating a power source, so that the structural complexity and cost of the camera cleaning device can be greatly reduced.

Description

Technical Field

[0001] This application relates to the field of camera cleaning technology, and more particularly to a camera cleaning device and a vehicle. Background Technology

[0002] To address blind spots during driving, most vehicles are now equipped with rear cameras. However, over long-term driving, camera lenses are easily contaminated by rain, dust, mud, and other impurities, resulting in blurred images. This severely affects the image recognition accuracy of the rear camera and reduces driving safety.

[0003] Currently, common methods for cleaning cameras include using a separate cleaning fluid pump for spray cleaning, an air pump for airflow cleaning, or a motor-driven brush for cleaning. All of these methods increase the structural complexity of the cleaning device and its overall cost. Utility Model Content

[0004] This application provides a camera cleaning device and a vehicle, aiming to improve the problems of high structural complexity and high structural cost of camera cleaning devices.

[0005] A camera cleaning device includes: a drive cam, which is connected to the output shaft of a rear wiper motor, and the rear wiper motor drives the drive cam to rotate when it is working; a transmission component, the first end of which is limited to the drive cam, and the rotation of the drive cam drives the transmission component to move; a guide component, which has a limiting hole through which the transmission component passes to limit the movement trajectory of the transmission component; and a cleaning assembly, which is located at the second end of the transmission component and drives the transmission component to clean the rear camera when the drive cam rotates.

[0006] Based on the aforementioned technical means, the reciprocating oscillation of the rear wiper motor can provide driving force for the drive cam. The irregularly shaped side of the drive cam converts the rotational driving force into the reciprocating linear motion of the transmission component, enabling the transmission component to drive the cleaning assembly to reciprocate and clean the rear camera. Therefore, the camera cleaning device can clean the rear camera through a purely mechanical structure without integrating a power source. This significantly reduces the structural complexity and cost of the camera cleaning device.

[0007] In one optional utility model, the cross-sectional shape of the drive cam is elliptical. At the first end of the transmission member, the drive cam moves from its short axis to its long axis, causing the cleaning component to clean the surface of the rear camera once. Furthermore, at the first end of the transmission member, the drive cam moves from its long axis to its short axis, causing the cleaning component to clean the surface of the rear camera once.

[0008] Based on the above-mentioned technical means, the rear camera can be cleaned multiple times within one reciprocating oscillation cycle of the windshield wiper, thereby improving the cleaning efficiency and cleaning effect of the rear camera.

[0009] In one optional utility model, the central axis of the transmission component along its length and the central axis of the drive cam coincide with the central axis of the rear camera along its vertical direction.

[0010] Based on the above technical means, the transmission component can only perform strict lifting and lowering movements, which can eliminate the lateral swaying or shaking of the transmission component, thereby further improving the kinetic energy utilization efficiency of the rear wiper motor and improving the cleaning effect on the rear camera.

[0011] An optional utility model further includes: two limiting flanges disposed at the first end of the transmission member and distributed along the axial direction of the drive cam, and in clearance fit with the drive cam; and a rolling member rotatably connected to the two limiting flanges and forming a rolling connection with the surface of the drive cam.

[0012] Based on the above technical means, the transmission component, through the clearance fit between the limiting flange and the drive cam, can prevent positional displacement between the transmission component and the drive cam during lifting and lowering movements, thereby further eliminating the shaking generated by the transmission component during lifting and lowering movements. The rolling connection between the rolling element and the drive cam can reduce transmission friction and wear between the drive cam and the transmission component, thereby improving the service life of the camera cleaning device.

[0013] In one optional utility model, the transmission component and the guide component are both located above the drive cam. The first end of the transmission component moves from the long axis of the drive cam to the short axis of the drive cam. Under the action of gravity, the transmission component drives the cleaning component to perform a downward movement to clean the rear camera.

[0014] Based on the above-mentioned technical means, the transmission component can descend under the action of gravity to perform the cleaning motion of the rear camera. Therefore, in addition to the reciprocating rotation drive of the drive cam, the transmission component can also use gravity to clean the rear camera even without a driving force, thus improving the cleaning effect of the camera cleaning device.

[0015] In one optional utility model, the length between the central axis of the rolling element and the end of the limiting flange near the drive cam is greater than the length between the major axis and the minor axis of the drive cam.

[0016] Based on the above technical means, it can be ensured that during the process of switching from the major axis of the drive cam abutting against the transmission component to the minor axis of the drive cam abutting against the transmission component, there will be no situation where the structure disengages from the drive cam due to the transmission component failing to descend in time. This improves the structural stability of the fit between the drive cam and the transmission component.

[0017] In one optional utility model, a limiting groove is formed on the side of the drive cam in the circumferential direction, and the camera cleaning device further includes a rolling element rotatably connected to the transmission component. The rolling element is embedded in the limiting groove and is rotatably connected to the drive cam.

[0018] Based on the above technical means, the first end of the transmission component and the drive cam always maintain a rolling connection, which can improve the connection between the transmission component and the drive cam and prevent the transmission component from shaking.

[0019] In one optional utility model, the transmission component and the guide component are both located above the drive cam. Under the drive of the drive cam, the transmission component drives the cleaning component to perform reciprocating lifting and lowering motion to clean the rear camera.

[0020] Based on the above technical means, when the rear camera is located above the wiper motor, the rear camera can also be cleaned without obstructing its view through the limiting cooperation between the drive cam and the transmission component, thereby improving the applicability of the camera cleaning device.

[0021] In one optional utility model, the transmission component and the guide component are both located below the drive cam. Under the drive of the drive cam, the transmission component drives the cleaning assembly to perform reciprocating lifting and lowering motion to clean the rear camera.

[0022] Based on the above technical means, when the rear camera is located below the wiper motor, the rear camera can also be cleaned without obstructing its view through the limiting cooperation between the drive cam and the transmission component, thereby improving the applicability of the camera cleaning device.

[0023] A vehicle comprising a camera cleaning device as described in any of the foregoing utility model claims.

[0024] Based on the aforementioned technical means, the reciprocating oscillation of the rear wiper motor can provide driving force for the drive cam. The irregularly shaped side of the drive cam converts the rotational driving force into the reciprocating linear motion of the transmission component, enabling the transmission component to drive the cleaning assembly to reciprocate and clean the rear camera. Therefore, the camera cleaning device can clean the rear camera through a purely mechanical structure without integrating a power source. This significantly reduces the structural complexity and cost of the camera cleaning device. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a camera cleaning device provided in one embodiment of this application;

[0026] Figure 2 This is a first front view structural schematic diagram of a camera cleaning device provided in an embodiment of this application;

[0027] Figure 3 This is a second front view schematic diagram of a camera cleaning device provided in one embodiment of this application;

[0028] Figure 4 This is a schematic diagram of another camera cleaning device provided in one embodiment of this application;

[0029] Figure 5 This is a front view structural schematic diagram of another camera cleaning device provided in an embodiment of this application;

[0030] Figure 6 This is a front view structural schematic diagram of another camera cleaning device provided in an embodiment of this application;

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Drive cam; 101. Limiting groove; 2. Transmission component; 3. Guide component; 301. Limiting hole; 4. Cleaning assembly; 5. Limiting flange; 6. Rolling component; 7. Rear wiper motor; 8. Rear camera; 9. Wiper arm. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] To address blind spots during driving, most vehicles are now equipped with rear cameras. However, over long-term driving, camera lenses are easily contaminated by rain, dust, mud, and other impurities, resulting in blurred images. This severely affects the image recognition accuracy of the rear camera and reduces driving safety.

[0035] Currently, common methods for cleaning cameras include using a separate cleaning fluid pump for spray cleaning, an air pump for airflow cleaning, or a motor-driven brush for cleaning. All of these methods increase the structural complexity of the cleaning device and its overall cost.

[0036] This application provides a camera cleaning device, which may include a drive cam, a transmission component, a guide component, and a cleaning assembly. The drive cam is driven by the output shaft of a rear wiper motor, and the rear wiper motor drives the drive cam to rotate when it is working. The first end of the transmission component is engaged with the drive cam, and the rotation of the drive cam drives the transmission component to move. The guide component has a limiting hole 301 through which the transmission component passes, thereby limiting the movement trajectory of the transmission component. The cleaning assembly is located at the second end of the transmission component, and when the drive cam rotates, it drives the transmission component to clean the rear camera.

[0037] Technical Effects: Considering that users often encounter challenging driving conditions when using the rear wiper motor to clean the rear windshield, the rear camera is easily obstructed by debris. Therefore, the reciprocating motion of the rear wiper motor provides driving force to the drive cam. The irregularly shaped side of the drive cam converts this rotational force into reciprocating linear motion of the transmission component, enabling it to drive the cleaning assembly to clean the rear camera. This allows the camera cleaning device to clean the rear camera purely mechanically without an integrated power source, ensuring the rear camera's view is not obstructed by rain, dust, mud, snow, insects, or other debris. It eliminates the need for additional electrical components, relying solely on the vehicle's existing rear wiper motor, thus complying with energy-saving and environmental protection standards. Furthermore, the device uses fewer components—drive cam, transmission component, guide component, and cleaning assembly—resulting in a compact structure and highly reliable transmission, significantly reducing the structural complexity and cost of the camera cleaning device.

[0038] Example 1

[0039] Reference Figure 1 , Figure 2 as well as Figure 3 The drive cam 1 has an elliptical cross-sectional shape. At the first end of the transmission member 2, the drive cam 1 moves from its short axis to its long axis, causing the cleaning component 4 to clean the surface of the rear camera 8 once. Similarly, at the first end of the transmission member 2, the drive cam 1 moves from its long axis to its short axis, causing the cleaning component 4 to clean the surface of the rear camera 8 once.

[0040] In this embodiment, the drive cam 1 has an elliptical cross-sectional shape along its radial direction. The elliptical drive cam 1 is easy to manufacture and has a major axis and a minor axis. In one example, the transmission member 2 can be a rod-like structure or a long column-like structure, having a first end and a second end. The first end of the first transmission member 2 is in a limiting engagement with the drive cam 1, and the second end of the first transmission member 2 is drive-connected to the cleaning assembly 4. For example, the first transmission member 2 can be a rigid rod and is rigidly connected to the cleaning assembly 4, thereby improving the accuracy of controlling the movement of the cleaning assembly 4 through the first transmission member 2.

[0041] During the process of the first end of the transmission component 2 moving from the short axis of the drive cam 1 to the long axis of the drive cam 1, the transmission component 2 is driven to move away from the center of the drive cam 1, so that the transmission component 2 can drive the cleaning component 4 to perform a surface cleaning movement along the rear camera 8 under the limiting action of the limiting hole 301.

[0042] As the first end of the transmission component 2 moves from the long axis to the short axis of the drive cam 1, the transmission component 2 moves closer to the center of the drive cam 1. This allows the transmission component 2, under the limiting action of the limiting hole 301, to drive the cleaning assembly 4 to perform one surface cleaning motion along the rear camera 8. Therefore, the rear camera 8 can be cleaned multiple times within one reciprocating oscillation cycle of the wiper, thereby improving the cleaning efficiency and effect of the rear camera 8.

[0043] In one or more embodiments, refer to Figure 2 and Figure 3 As shown, the central axis of the transmission component 2 along its length and the central axis of the drive cam 1 coincide with the central axis of the rear camera 8 along its vertical direction.

[0044] In this embodiment, the central axis of the transmission component 2 along its length and the central axis of the drive cam 1 coincide with the central axis of the rear camera 8 along its vertical direction. This can be understood as the transmission component 2 being parallel to the vertical direction in its length direction under the limiting action of the guide component 3. The guide component 3 can be a rectangular frame structure or a cylindrical structure, and the limiting hole 301 it opens is matched with the cross-sectional shape of the transmission component 2. For example, the guide component 3 can include a bushing embedded in the limiting hole 301, wherein the bushing can be made of one of the materials polytetrafluoroethylene (PTFE) and ultra-high molecular weight polyethylene (UHMW-PE), thereby reducing the coefficient of friction between the guide component 3 and the transmission component 2, for example, reducing the coefficient of friction to below 0.1, and improving the transmission smoothness of the transmission component 2.

[0045] This allows the transmission component 2 to reciprocate vertically when simultaneously limited and engaged by the drive cam 1 and the transmission component 2. This ensures that the transmission component 2 can only perform strictly vertical movements, eliminating lateral swaying or shaking, thereby further improving the kinetic energy utilization efficiency of the rear wiper motor 7 and the cleaning effect on the rear camera 8. Furthermore, the sequential vertical arrangement of the components of the camera cleaning device makes its structure more compact, reducing its occupancy in the width and volume of the installation space. This improves the applicability of the camera cleaning device to various installation scenarios; for example, it can be installed in confined spaces such as the high-mounted brake light and the top trim panel of the rear windshield.

[0046] In one or more embodiments, the camera cleaning device may further include two limiting flanges 5 and a rolling element 6. The two limiting flanges 5 are disposed at the first end of the transmission element 2 and are distributed along the axial direction of the drive cam 1, and are clearance-fitted with the drive cam 1. The rolling element 6 is rotatably connected to the two limiting flanges 5 and forms a rolling connection with the surface of the drive cam 1.

[0047] In this embodiment, the transmission component 2 is clearance-fitted with the drive cam 1 via the limiting flange 5, which can prevent positional displacement between the transmission component 2 and the drive cam 1 during lifting and lowering movements, thereby further eliminating the swaying of the transmission component 2 during lifting and lowering movements. For example, the limiting flange 5 and the first end of the transmission component 2 can be rigidly connected, and a space is formed between the two limiting flanges 5 for the drive cam 1 to be embedded. This space allows for clearance-fitting with the drive cam 1, preventing the transmission component 2 from axially shifting relative to the drive cam 1 when the drive cam 1 abuts against the transmission component 2.

[0048] The rolling element 6 is rotatably connected to the two limiting flanges 5 and can form a rolling connection with the surface of the drive cam 1. The rolling element 6 can be a roller, wheel, or other component, and the number of rolling elements 6 can be multiple. Those skilled in the art can determine the number and type of rolling elements 6 according to actual design requirements, and no further limitations are made here. The rolling connection between the rolling element 6 and the drive cam 1 can reduce transmission friction and wear between the drive cam 1 and the transmission component 2, thereby improving the service life of the camera cleaning device.

[0049] In one or more embodiments, the transmission component 2 and the guide component 3 are both located above the drive cam 1. The first end of the transmission component 2 moves from the long axis of the drive cam 1 to the short axis of the drive cam 1. Under the action of gravity, the transmission component 2 drives the cleaning component 4 to make a downward movement to clean the rear camera 8.

[0050] In this embodiment, considering that the rear wiper motor 7 is mounted above the rear windshield, the guide member 3 and the transmission member 2 are both located above the drive cam 1. For example, the camera cleaning device can be integrated into the high-mounted brake light or inside the top trim panel of the rear windshield of the vehicle. Correspondingly, the rear camera 8 can be understood as a high-mounted rear-view camera of the vehicle. For example, the high-mounted rear-view camera can be a high-mounted reversing camera or a high-mounted rear dashcam camera.

[0051] Therefore, under the limiting engagement structure of the transmission component 2 and the drive cam 1, during the process of the first end of the transmission component 2 moving from the long axis to the short axis of the drive cam 1, that is, when the drive cam 1 removes its lifting and abutting force on the first end of the transmission component 2, the transmission component 2 can perform a vertical downward movement under its own gravity. This avoids the transmission component 2 obstructing the view of the rear camera 8, and cleans the surface of the rear camera 8 during the descent. Thus, in addition to the reciprocating rotation drive of the drive cam 1, the transmission component 2 resets the cleaning component 4 without the action of driving force, and can use gravity to clean the rear camera 8, thereby improving the cleaning effect of the camera cleaning device.

[0052] In one or more embodiments, the length between the central axis of the rolling element 6 and the end of the limiting flange 5 near the drive cam 1 is greater than the length difference between the major axis and the minor axis of the drive cam 1. This length limitation ensures that during the transition from the major axis of the drive cam 1 abutting against the transmission element 2 to the minor axis of the drive cam 1 abutting against the transmission element 2, structural disengagement between the transmission element 2 and the drive cam 1 due to the transmission element 2 not descending in time will not occur. This improves the structural stability of the fit between the drive cam 1 and the transmission element 2.

[0053] In one or more embodiments, the cleaning component 4 may include a cleaning bracket and a cleaning scraper, wherein the cleaning bracket is rigidly connected to the second end of the transmission member 2, and the cleaning scraper is detachably connected to the cleaning bracket. For example, the cleaning scraper and the cleaning component may be connected by a snap-fit ​​mechanism. This reduces the difficulty for users in assembling and disassembling the cleaning scraper.

[0054] Example 2

[0055] Reference Figure 4 , Figure 5 as well as Figure 6 As shown, a limiting groove 101 is formed on the side of the drive cam 1 along the circumferential direction. The camera cleaning device also includes a rolling element 6 that is rotatably connected to the transmission element 2. The rolling element 6 is embedded in the limiting groove 101 and is rotatably connected to the drive cam 1.

[0056] In this embodiment of the application, the drive cam 1 and the transmission member 2 are connected by the limiting groove 101 and the rolling member 6 to maintain the first end of the first transmission member 2 in a rolling connection with the drive cam 1.

[0057] In one or more embodiments, considering that the rear wiper motor 7 is mounted above the rear windshield, and the guide member 3 and transmission member 2 are both located above the drive cam 1, the camera cleaning device can be integrated into the high-mounted brake light or inside the top trim panel of the rear windshield of the vehicle, such as... Figure 4 and Figure 5 As shown. Driven by the rear wiper motor, the transmission component 2 continuously drives the cleaning assembly 4 to perform reciprocating lifting motion to clean the rear camera 8. Based on the above structural design, the first end of the transmission component 2 maintains a rolling connection with the drive cam 1, which improves the connection strength between the transmission component 2 and the drive cam 1 and prevents the transmission component 2 from shaking.

[0058] When the rear camera 8 is located below the wiper motor, the rear camera 8 can be cleaned without obstructing its view through the limiting cooperation between the drive cam 1 and the transmission component 2, thereby improving the applicability of the camera cleaning device.

[0059] Example 3

[0060] Reference Figure 4 , Figure 5 as well as Figure 6 As shown, a limiting groove 101 is formed on the side of the drive cam 1 along the circumferential direction. The camera cleaning device also includes a rolling element 6 that is rotatably connected to the transmission element 2. The rolling element 6 is embedded in the limiting groove 101 and is rotatably connected to the drive cam 1.

[0061] In this embodiment of the application, the drive cam 1 and the transmission member 2 are connected by the limiting groove 101 and the rolling member 6 to maintain the first end of the first transmission member 2 in a rolling connection with the drive cam 1.

[0062] In one or more embodiments, considering that the rear wiper motor 7 is mounted below the rear windshield, and the guide member 3 and transmission member 2 are both located below the drive cam 1, the camera cleaning device can be integrated inside the bottom trim panel of the vehicle's rear windshield, such as... Figure 6As shown. Driven by the rear wiper motor, the transmission component 2 continuously drives the cleaning assembly 4 to perform a reciprocating lifting motion to clean the rear camera 8. For example, when the first end of the transmission component 2 is in contact with the long axis of the drive cam 1, and then changes to the first end of the transmission component 2 contacting the short axis of the drive cam 1, the cleaning assembly 4 can move upward under the pull of the drive cam 1. This avoids the transmission component 2 obstructing the view of the rear camera 8, and the cleaning assembly 4 can clean the rear camera 8 through its reciprocating lifting motion, thereby improving the applicability of the camera cleaning device. Correspondingly, the rear camera 8 can be a low-position reversing camera or a low-position rear dashcam camera. Based on the above structural design, the first end of the transmission component 2 maintains a rolling connection with the drive cam 1, which improves the connection strength between the transmission component 2 and the drive cam 1 and prevents the transmission component 2 from shaking.

[0063] This application also provides a vehicle that includes a camera cleaning device as described in any of the above utility model embodiments.

[0064] In summary, this utility model discloses a camera cleaning device and a vehicle. This utility model embodiment may include a drive cam 1, a transmission component 2, a guide component 3, and a cleaning component 4. The drive cam 1 is connected to the output shaft of the rear wiper motor 7. When the rear wiper motor 7 operates, it drives the wiper arm 9 and the drive cam 1 to rotate (also referred to as reciprocating oscillation). The first end of the transmission component 2 is engaged with the drive cam 1 for limiting, and the rotation of the drive cam 1 drives the transmission component 2 to move. The guide component 3 has a limiting hole 301 through which the transmission component 2 passes, thus limiting the movement trajectory of the transmission component 2. The cleaning component 4 is located at the second end of the transmission component 2, and when the drive cam 1 rotates, it drives the transmission component 2 to clean the rear camera 8. The rear wiper motor 7 drives the wiper arm 9 to reciprocate, providing driving force to the drive cam 1. The irregularly shaped side of the drive cam 1 converts the rotational driving force into the reciprocating linear motion of the transmission component 2. This allows the transmission component 2 to drive the cleaning assembly 4 to reciprocate and clean the rear camera 8. Therefore, the camera cleaning device can clean the rear camera 8 through a purely mechanical structure without integrating a power source. This significantly reduces the structural complexity and cost of the camera cleaning device. Furthermore, since the camera cleaning device itself does not integrate electrical components, it will not fail to function due to electrical component malfunctions in harsh driving environments. This improves the adaptability of the camera cleaning device to driving environments and enhances its operational stability.

[0065] Terminology Explanation

[0066] In this application, the driving cam 1 refers to a cam with an irregularly shaped radial outer surface that can periodically change its contact radius with the first end of the transmission component 2 during reciprocating oscillation.

[0067] In this application, "multiple" refers to two or more.

[0068] In this application, unless otherwise expressly defined, 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0070] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0071] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A camera cleaning device, characterized in that, The device includes: A drive cam is connected to the output shaft of the rear wiper motor, and the rear wiper motor drives the drive cam to rotate when it is working. A transmission component, wherein the first end of the transmission component is limitedly engaged with the drive cam, and the rotation of the drive cam drives the transmission component to move. A guide member having a limiting hole through which the transmission member passes, thereby limiting the movement trajectory of the transmission member; A cleaning component is located at the second end of the transmission member, which, when the drive cam rotates, drives the transmission member to clean the rear camera.

2. The camera cleaning device of claim 1, wherein, The drive cam has an elliptical cross-sectional shape. At the first end of the transmission component, it moves from the short axis to the long axis of the drive cam, causing the cleaning assembly to clean the surface of the rear camera once. As the first end of the transmission component moves from the long axis of the drive cam to the short axis of the drive cam, the cleaning component is driven to clean the surface of the rear camera once.

3. The camera cleaning device of claim 2, wherein, The central axis of the transmission component along its length and the central axis of the drive cam coincide with the central axis of the rear camera along its vertical direction.

4. The camera cleaning device according to any one of claims 1-3, wherein, The camera cleaning device also includes: Two limiting flanges are provided at the first end of the transmission member, and the two limiting flanges are distributed along the axial direction of the drive cam and are clearance-fitted with the drive cam. A rolling element, which is rotatably connected to the two limiting flanges and forms a rolling connection with the surface of the drive cam.

5. The camera cleaning device of claim 4, wherein, The transmission component and the guide component are both located above the drive cam. The first end of the transmission component moves from the long axis of the drive cam to the short axis of the drive cam. Under the action of gravity, the transmission component drives the cleaning component to make a downward movement to clean the rear camera.

6. The camera cleaning device of claim 4, wherein, The length between the central axis of the rolling element and the end of the limiting flange near the drive cam is greater than the length between the major axis and the minor axis of the drive cam.

7. The camera cleaning device of claim 2 or 3, wherein, The side of the drive cam has a circumferentially oriented limiting groove. The camera cleaning device also includes a rolling element that is rotatably connected to the transmission component. The rolling element is embedded in the limiting groove and is rotatably connected to the drive cam.

8. The camera cleaning device of claim 7, wherein, The transmission component and the guide component are both located above the drive cam. Driven by the drive cam, the transmission component drives the cleaning component to perform reciprocating lifting and lowering motion to clean the rear camera.

9. The camera cleaning device of claim 7, wherein, Both the transmission component and the guide component are located below the drive cam. Driven by the drive cam, the transmission component drives the cleaning assembly to perform reciprocating lifting and lowering motion to clean the rear camera.

10. A vehicle characterized by comprising: The vehicle includes a camera cleaning device as described in any one of claims 1-9.

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