Lens front cover and camera with same

Abstract

The utility model provides a lens front cover and a camera with the same, and the lens front cover comprises a housing which is connected with a lens module and is provided with a light-transmitting channel; the window glass is arranged in the light-transmitting channel and can deflect relative to the shell, and the rotating axis of the window glass is perpendicular to the optical axis of the lens module; and the driving assembly is in driving connection with the window glass so as to change the included angle between the window glass and the optical axis of the lens module. Through the technical scheme provided by the invention, the problem of poor imaging effect of a camera in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to a lens front cover. Background Art

[0002] Cameras and other surveillance equipment are often used to monitor road parking conditions, but since the lens module and window glass are separated, when shooting an oncoming car or other structures that generate light sources, the light beam emitted by the car's headlights or other light beams will refract, causing the camera to have a "ghost" phenomenon when imaging, affecting the imaging of the surveillance camera, thereby reducing the clarity of the image and making it difficult for staff to identify. Utility Model Content

[0003] The utility model provides a lens front cover and a camera having the same, so as to solve the problem of poor imaging effect of the camera in the prior art.

[0004] According to one aspect of the utility model, a front lens cover is provided, which includes: a shell connected to the lens module, the shell having a light-transmitting channel; a window glass arranged in the light-transmitting channel, the window glass can be deflected relative to the shell, and the axis of rotation of the window glass is perpendicular to the optical axis of the lens module; a driving assembly, which is connected to the window glass to change the angle between the window glass and the optical axis of the lens module.

[0005] Furthermore, the front lens cover also includes a rotating cover body, which is rotatably arranged in the light-transmitting channel, the window glass is fixed on the rotating cover body, the driving component is drivingly connected to the rotating cover body, and the driving component drives the lens module to rotate through the rotating cover body.

[0006] Furthermore, a sealing structure is provided between the shell and the rotating cover.

[0007] Furthermore, the sealing structure includes: a first sealing ring, which is arranged on the rotating cover body; a second sealing ring, which is arranged on the shell; and a telescopic section, one end of which is connected to the first sealing ring and the other end of which is connected to the second sealing ring.

[0008] Furthermore, the rotating cover body includes: a front cover body, which is arranged on the outside of the window glass; a rear cover body, which is arranged on the inside of the window glass. The front cover body and the rear cover body cooperate to fix the window glass in the light-transmitting channel. The rear cover body is rotationally connected to the shell, and the driving assembly is drivingly connected to the rear cover body. The driving assembly drives the window glass to rotate through the rear cover body.

[0009] Furthermore, the inner ring of the first sealing ring is provided with a groove, the groove is annularly arranged on the first sealing ring, the periphery of the window glass is arranged in the groove, the front cover body and the rear cover body cooperate to form a first fixed cavity, and the first sealing ring is arranged in the first fixed cavity.

[0010] Furthermore, the front lens cover also includes a pressure cover, which is fixed in the light-transmitting channel. The pressure cover cooperates with the end of the shell to form a second fixed cavity, and the second sealing ring is arranged in the second fixed cavity.

[0011] Furthermore, the driving assembly includes a driving member and a gear transmission structure, one end of the gear transmission structure is connected to the rotating cover body, and the driving member is drivingly connected to the other end of the gear transmission structure. The driving member drives the window glass to rotate through the gear transmission structure.

[0012] Furthermore, the gear transmission structure includes: a first transmission member, the first transmission member includes a first worm wheel and a first worm screw which are connected to each other, and the first worm wheel is meshed with the driving shaft of the driving member; a second transmission member, the second transmission member includes a connecting shaft, a second worm wheel and a third worm wheel, one end of the connecting shaft is connected to the second worm wheel, and the other end of the connecting shaft is connected to the third worm wheel, and the second worm wheel is meshed with the first worm screw; a gear structure is arranged on the rear cover body, and the gear structure is meshed with the third worm wheel.

[0013] Furthermore, the drive assembly also includes a drive shell, which is fixed on the shell, and the drive shell has a accommodating cavity. A through hole is provided on the side wall of the drive shell, and the accommodating cavity is connected to the through hole. The driving member and part of the gear transmission structure are located in the accommodating cavity, the connecting shaft is passed through the through hole, and the third worm gear is located outside the accommodating cavity.

[0014] Furthermore, a rotating shaft is provided on the rotating cover body, the axial direction of the rotating shaft is perpendicular to the optical axis, and the rotating shaft extends along the center of the window glass, an avoidance portion is provided on the driving shell, a rotating groove is provided on the shell, the avoidance portion is provided corresponding to the rotating groove, and the rotating shaft is rotatably provided between the rotating groove and the avoidance portion.

[0015] Furthermore, a damping ring is arranged between the rotating shaft and the housing.

[0016] According to another aspect of the utility model, a camera is provided, which includes a body, a lens module and the above-mentioned front lens cover, the body, the lens module and the front lens cover are connected in sequence, and the window glasses of the lens module and the front lens cover are arranged correspondingly.

[0017] By applying the technical solution of the utility model, the shell is connected to the lens module, the window glass is arranged in the light transmission channel of the shell, and the window glass can be deflected relative to the shell. With such arrangement, the angle between the window glass and the optical axis of the lens module can be changed, thereby changing the refraction angle after the light source beam is irradiated to the window glass, thereby improving the "ghost" or glare phenomenon, improving the imaging effect of the camera, improving the clarity of the image, and facilitating identification by the staff. At the same time, the driving component can drive the window glass to rotate, which can improve the automation degree of the front cover of the lens, facilitate driving the window glass to rotate, and at the same time, the driving component drives the window glass to rotate, which is highly efficient, and the driving component can drive the window glass to the required angle, which can meet the use of more scenes and improve the versatility of the front cover of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 An exploded view of the front lens cover provided by the utility model is shown;

[0020] Figure 2 The structure diagram of the front lens cover provided by the utility model is shown;

[0021] Figure 3 A cross-sectional view of the front lens cover provided by the utility model is shown;

[0022] Figure 4 A cross-sectional view of the front lens cover provided by the utility model from another viewing angle is shown;

[0023] Figure 5 Shows Figure 4 A partial enlarged view of the middle A;

[0024] Figure 6 It shows a schematic structural diagram of the window glass rotation provided by the utility model;

[0025] Figure 7 Shows Figure 6 A partial enlarged view of point B in the middle;

[0026] Figure 8 The schematic diagram of the structure of the gear transmission structure provided by the utility model is shown;

[0027] Fig. 9 The structure diagram of the camera provided by the utility model is shown;

[0028] Fig.10 The following is a diagram showing the adjustment logic of the window glass provided by the present invention.

[0029] The above drawings include the following reference numerals:

[0030] 10. Shell; 11. Light-transmitting channel; 12. Rotating groove;

[0031] 20. Window glass;

[0032] 30. driving assembly; 31. driving member; 311. driving shaft;

[0033] 32. Gear transmission structure;

[0034] 321, first transmission member; 3211, first worm wheel; 3212, first worm;

[0035] 322, second transmission member; 3221, connecting shaft; 3222, second worm gear; 3223, third worm gear;

[0036] 323. Gear structure;

[0037] 33. driving housing; 331. accommodating cavity; 332. through hole; 333. avoidance portion;

[0038] 40. Rotating cover body; 41. Front cover body;

[0039] 42. rear cover; 421. first rotating shaft; 422. second rotating shaft; 43. first fixing cavity;

[0040] 50. Sealing structure; 51. First sealing ring; 511. Grooving; 52. Second sealing ring; 53. Telescopic section;

[0041] 61. gland; 62. second fixing cavity; 63. damping ring; 64. fixing member;

[0042] 100. lens module; 200. main body. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0044] like Figures 1 to 9As shown, the embodiment of the utility model provides a front lens cover, which includes a housing 10, a window glass 20 and a driving assembly 30. The housing 10 is connected to the lens module 100, and the housing 10 has a light transmission channel 11. The window glass 20 is arranged in the light transmission channel 11, and the window glass 20 can be deflected relative to the housing 10, and the axis of rotation of the window glass 20 is perpendicular to the optical axis of the lens module 100. The driving assembly 30 is drivingly connected to the window glass 20 to change the angle between the window glass 20 and the optical axis of the lens module 100.

[0045] By applying the technical solution of the present application, the housing 10 is connected to the lens module 100, and the window glass 20 is arranged in the light transmission channel 11 of the housing 10, and the window glass 20 can be deflected relative to the housing 10. Such arrangement can change the angle between the window glass 20 and the optical axis of the lens module 100, thereby changing the refraction angle after the light source beam is irradiated to the window glass 20, thereby improving the "ghost" or glare phenomenon, improving the imaging effect of the camera, improving the clarity of the imaging, and facilitating identification by the staff. At the same time, the driving component 30 can drive the window glass 20 to rotate, which can improve the automation degree of the front cover of the lens, facilitate driving the window glass 20 to rotate, and at the same time, the driving component 30 drives the window glass 20 to rotate, which is highly efficient, and the driving component 30 can drive the window glass 20 to the desired angle, which can meet the use of more scenes and improve the versatility of the front cover of the lens.

[0046] like Figures 4 to 7 As shown, the front lens cover also includes a rotating cover body 40, which is rotatably arranged in the light transmission channel 11, the window glass 20 is fixed on the rotating cover body 40, and the driving assembly 30 is drivingly connected with the rotating cover body 40, and the driving assembly 30 drives the lens module 100 to rotate through the rotating cover body 40. Such an arrangement facilitates the fixing and rotation of the window glass 20, and at the same time can prevent the driving assembly 30 from damaging the window glass 20, thereby increasing the service life of the window glass 20.

[0047] There is a sealing structure 50 between the housing 10 and the rotating cover 40. This arrangement can achieve a waterproof function between the housing 10 and the rotating cover 40, preventing rainwater or other impurities from entering the front lens cover and damaging the lens assembly, thereby ensuring the normal operation of the camera.

[0048] Specifically, the sealing structure 50 includes a first sealing ring 51, a second sealing ring 52 and a telescopic section 53. The first sealing ring 51 is arranged on the rotating cover body 40, specifically, the first sealing ring 51 is arranged between the rotating cover body 40 and the window glass 20. With such arrangement, the first sealing ring 51 can achieve sealing between the rotating cover body 40 and the window glass 20. The second sealing ring 52 is arranged on the shell 10. One end of the telescopic section 53 is connected to the first sealing ring 51, and the other end of the telescopic section 53 is connected to the second sealing ring 52, and the telescopic section 53 can achieve sealing between the shell 10 and the rotating cover body 40. By adopting the above structure, the waterproof structure can be simplified, the sealing structure 50 has a simple structure and a small size, which reduces the volume of the front cover of the lens, making the structure of the front cover of the lens more compact. Figure 5 and Figure 7 As shown, the telescopic section 53 can extend or contract during the rotation of the window glass 20 .

[0049] Further, the rotating cover 40 includes a front cover 41 and a rear cover 42. The front cover 41 is arranged on the outside of the window glass 20. The rear cover 42 is arranged on the inside of the window glass 20. The front cover 41 and the rear cover 42 cooperate to fix the window glass 20 in the light transmission channel 11. The rear cover 42 is rotatably connected to the housing 10. The driving assembly 30 is drivingly connected to the rear cover 42. The driving assembly 30 drives the window glass 20 to rotate through the rear cover 42. Such a configuration facilitates fixing the window glass 20 on the rotating cover 40, and the structure is simple and easy to assemble. At the same time, it is convenient to repair and replace the window glass 20.

[0050] The inner ring of the first sealing ring 51 is provided with a groove 511, the groove 511 is annularly arranged on the first sealing ring 51, the periphery of the window glass 20 is arranged in the groove 511, the front cover body 41 and the rear cover body 42 cooperate to form a first fixed cavity 43, and the first sealing ring 51 is arranged in the first fixed cavity 43. Such an arrangement can prevent the first sealing ring 51 from falling off and ensure the sealing effect of the first sealing ring 51. Specifically, when installing the rotating cover body 40 and the sealing ring, the rear cover body 42 is first fixed to the housing 10, and then the first sealing ring 51 is fixed to the rear cover body 42 through the front cover body 41.

[0051] Furthermore, the front lens cover also includes a pressure cover 61, which is fixed in the light transmission channel 11, and the pressure cover 61 cooperates with the end of the housing 10 to form a second fixed cavity 62, and the second sealing ring 52 is arranged in the second fixed cavity 62. Such a configuration facilitates the fixing of the second sealing ring 52 to prevent the second sealing ring 52 from falling off.

[0052] like Figure 1 and Figure 8The driving assembly 30 includes a driving member 31 and a gear transmission structure 32. One end of the gear transmission structure 32 is connected to the rotating cover 40. The driving member 31 is drivingly connected to the other end of the gear transmission structure 32. The driving member 31 drives the window glass 20 to rotate through the gear transmission structure 32. In this way, the driving member 31 drives the gear transmission structure 32 to work, which can ensure the stability of the driving assembly 30 driving the window glass 20 to rotate.

[0053] Specifically, the gear transmission structure 32 includes a first transmission member 321, a second transmission member 322 and a gear structure 323. The first transmission member 321 includes a first worm wheel 3211 and a first worm 3212 connected to each other, and the first worm wheel 3211 is meshed with the driving shaft 311 of the driving member 31. Among them, the driving member 31 is a driving motor, and the driving shaft 311 of the driving member 31 is a worm structure. The second transmission member 322 includes a connecting shaft 3221, a second worm wheel 3222 and a third worm wheel 3223, one end of the connecting shaft 3221 is connected to the second worm wheel 3222, and the other end of the connecting shaft 3221 is connected to the third worm wheel 3223, and the second worm wheel 3222 is meshed with the first worm 3212. The gear structure 323 is arranged on the rear cover body 42, and the gear structure 323 is meshed with the third worm wheel 3223. In this way, the gear transmission structure 32 is a three-stage transmission, with a large transmission ratio and a high torque output, which is convenient for driving the window glass 20 to rotate. Furthermore, since the worm gear drive itself has a self-locking structural characteristic, it is ensured that the window glass 20 has a certain self-locking ability when not in use, thereby optimizing product performance and improving customer experience.

[0054] Furthermore, the drive assembly 30 also includes a drive housing 33, which is fixed on the housing 10. The drive housing 33 has a housing cavity 331. A through hole 332 is provided on the side wall of the drive housing 33. The housing cavity 331 is connected to the through hole 332. The drive member 31 and part of the gear transmission structure 32 are located in the housing cavity 331. The connecting shaft 3221 is passed through the through hole 332. The third worm gear 3223 is located outside the housing cavity 331. In this way, the drive housing 33 can protect the drive member 31 and the gear transmission structure 32, and can prevent the gear transmission structure 32 from causing damage to other components of the lens front cover during operation. In addition, in this way, the space utilization rate can be improved, the volume of the drive housing 33 is prevented from being too large, and the drive assembly 30 can be arranged conveniently.

[0055] The rotating cover 40 is provided with a rotating shaft, specifically, the rear cover 42 is provided with a rotating shaft. The axial direction of the rotating shaft is perpendicular to the optical axis, and the rotating shaft extends along the center of the window glass 20. The driving housing 33 is provided with an escape portion 333, and the housing 10 is provided with a rotating groove 12. The escape portion 333 is provided corresponding to the rotating groove 12, and the rotating shaft is rotatably provided between the rotating groove 12 and the escape portion 333. In this way, the driving housing 33 can be prevented from affecting the rotation of the rotating shaft, and the normal rotation of the rotating cover 40 is ensured.

[0056] Specifically, two rotating shafts are arranged on the rotating cover body 40, and two rotating grooves 12 are arranged on the driving housing 33. The two rotating shafts are arranged one by one with the two rotating grooves 12, and the two rotating shafts are arranged at both ends of the rear cover body 42. For the convenience of distinction, the two rotating shafts are respectively a first rotating shaft 421 and a second rotating shaft 422. The first rotating shaft 421 is arranged between the corresponding rotating groove 12 and the avoidance portion 333, and the second rotating shaft 422 is arranged between the corresponding rotating groove 12 and the fixing member 64. Such an arrangement facilitates fixing the rear cover body 42. Among them, the rotating groove 12 and the avoidance portion 333 are both arc-shaped structures, and the fixing member 64 has an arc-shaped structure.

[0057] A damping ring 63 is provided between the rotating shaft and the housing 10. This arrangement can ensure the rotation accuracy of the rotating cover 40 and reduce the shaking of the window glass 20 caused by the transmission backlash of the gear transmission structure 32.

[0058] like Fig. 9 As shown, another embodiment of the utility model provides a camera, the camera includes a body 200, a lens module 100 and the above-mentioned front lens cover, the body 200, the lens module 100 and the front lens cover are connected in sequence, and the lens module 100 is arranged corresponding to the window glass 20 of the front lens cover. The camera is usually installed according to the window glass 20 tilted at C degrees, when the window glass 20 is adjusted, the angle between the window glass 20 and the optical axis of the lens module 100 is D, and the D angle can be automatically adjusted by the driving component 30, and the telescopic section 53 is elastically stretched to achieve the overall waterproof function of the front lens cover.

[0059] like Fig.10 As shown, the specific adjustment method of the window glass 20 is:

[0060] 1. The camera itself has a controller, which has an image ghost recognition algorithm. The impact of ghosts on imaging has a limited value a. The controller uses the image ghost recognition algorithm to identify the degree of ghost impact on the current image and obtains a value X. When X>a, it means that the ghosting degree is serious and it is determined that the window glass needs to be adjusted by 20 degrees. When X<a, it means that the ghosting degree is light and it is determined that there is no need to adjust the window glass by 20 degrees.

[0061] 2. The controller identifies the degree of ghosting of the current image and obtains a value X. The controller compares X with a.

[0062] 3. If X>a, the controller controls the driving member 31 to work, so that the window glass 20 rotates. Each time the window glass 20 rotates 1 degree, the controller calculates the parameter X in real time until X is adjusted to be less than a, and the adjustment is completed;

[0063] 4. If X<a, it is determined that the ghosting effect is small and the driving member 31 remains stationary.

[0064] The staff can change the rotation angle of the window glass 20 each time through the controller, which can be 0.5 degrees, 1 degree, or 2 degrees.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A front lens cover, characterized in that: The front lens cover comprises: A housing (10) connected to the lens module (100), wherein the housing (10) has a light-transmitting channel (11); A window glass (20) is arranged in the light-transmitting channel (11); the window glass (20) can be deflected relative to the housing (10); and the axis of rotation of the window glass (20) is perpendicular to the optical axis of the lens module (100); A driving assembly (30) is drivingly connected to the window glass (20) to change the angle between the window glass (20) and the optical axis of the lens module (100).

2. The lens front cover according to claim 1, characterized in that: The front lens cover also includes a rotating cover body (40), the rotating cover body (40) is rotatably arranged in the light-transmitting channel (11), the window glass (20) is fixed on the rotating cover body (40), the driving component (30) is drivingly connected to the rotating cover body (40), and the driving component (30) drives the lens module (100) to rotate through the rotating cover body (40).

3. The lens front cover according to claim 2, characterized in that: A sealing structure (50) is provided between the housing (10) and the rotating cover (40).

4. The lens front cover according to claim 3, characterized in that: The sealing structure (50) comprises: A first sealing ring (51) is arranged on the rotating cover body (40); A second sealing ring (52) is arranged on the housing (10); A telescopic section (53), one end of the telescopic section (53) is connected to the first sealing ring (51), and the other end of the telescopic section (53) is connected to the second sealing ring (52).

5. The lens front cover according to claim 4, characterized in that: The rotating cover body (40) comprises: A front cover (41) is arranged on the outer side of the window glass (20); The rear cover (42) is arranged on the inner side of the window glass (20); the front cover (41) and the rear cover (42) cooperate to fix the window glass (20) in the light-transmitting channel (11); the rear cover (42) is rotationally connected to the housing (10); the driving assembly (30) is drivingly connected to the rear cover (42); and the driving assembly (30) drives the window glass (20) to rotate via the rear cover (42).

6. The lens front cover according to claim 5, characterized in that: The inner ring of the first sealing ring (51) is provided with a groove (511), and the groove (511) is annularly arranged on the first sealing ring (51), and the periphery of the window glass (20) is arranged in the groove (511), and the front cover body (41) and the rear cover body (42) cooperate to form a first fixed cavity (43), and the first sealing ring (51) is arranged in the first fixed cavity (43).

7. The lens front cover according to claim 5, characterized in that: The lens front cover also includes a pressure cover (61), the pressure cover (61) is fixed in the light-transmitting channel (11), the pressure cover (61) cooperates with the end of the housing (10) to form a second fixed cavity (62), and the second sealing ring (52) is arranged in the second fixed cavity (62).

8. The lens front cover according to claim 5, characterized in that: The driving assembly (30) comprises a driving member (31) and a gear transmission structure (32); one end of the gear transmission structure (32) is connected to the rotating cover (40); the driving member (31) is drivingly connected to the other end of the gear transmission structure (32); and the driving member (31) drives the window glass (20) to rotate via the gear transmission structure (32).

9. The lens front cover according to claim 8, characterized in that: The gear transmission structure (32) comprises: A first transmission member (321), the first transmission member (321) comprising a first worm wheel (3211) and a first worm (3212) connected to each other, the first worm wheel (3211) being meshed with a driving shaft (311) of the driving member (31); A second transmission member (322), the second transmission member (322) comprising a connecting shaft (3221), a second worm gear (3222) and a third worm gear (3223), one end of the connecting shaft (3221) being connected to the second worm gear (3222), the other end of the connecting shaft (3221) being connected to the third worm gear (3223), and the second worm gear (3222) being meshed with the first worm (3212); A gear structure (323) is arranged on the rear cover body (42), and the gear structure (323) is meshed with the third worm gear (3223).

10. The front lens cover according to claim 9, characterized in that: The drive assembly (30) further comprises a drive housing (33), wherein the drive housing (33) is fixed on the housing (10), the drive housing (33) has a receiving cavity (331), a through hole (332) is provided on a side wall of the drive housing (33), the receiving cavity (331) is communicated with the through hole (332), the drive member (31) and part of the gear transmission structure (32) are located in the receiving cavity (331), the connecting shaft (3221) is passed through the through hole (332), and the third worm gear (3223) is located outside the receiving cavity (331).

11. The lens front cover according to claim 10, characterized in that: The rotating cover (40) is provided with a rotating shaft, the axial direction of the rotating shaft is perpendicular to the optical axis, and the rotating shaft extends along the center of the window glass (20), the driving shell (33) is provided with an avoidance portion (333), the shell (10) is provided with a rotating groove (12), the avoidance portion (333) is arranged corresponding to the rotating groove (12), and the rotating shaft is rotatably arranged between the rotating groove (12) and the avoidance portion (333).

12. The lens front cover according to claim 11, characterized in that: A damping ring (63) is provided between the rotating shaft and the housing (10).

13. A camera, characterized in that: The camera comprises a body (200), a lens module (100) and a front lens cover according to any one of claims 1 to 12, wherein the body (200), the lens module (100) and the front lens cover are connected in sequence, and the lens module (100) and the window glass (20) of the front lens cover are arranged correspondingly.

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