Lens cover
Through the rotating shaft assembly and limit design of the lens cover and lens cover seat, the problems of easy loss and complex structure of the lens cover are solved, and convenient operation and simplified design of multiple limit positions are achieved.
Patent Information
- Application Number
- CN202510898331.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-08-15
AI Technical Summary
The design of existing lens covers is easily lost and complex in structure, making it difficult to achieve multiple limit positions for simple operation.
The lens cover is connected to the lens cover seat through a rotating shaft assembly, which includes an elastic element and a limiting assembly, providing multiple limiting angles and limiting positions, and simple operation and locking are achieved using a magnetic suction assembly.
It realizes convenient operation of the lens cover and multiple limit positions to avoid loss, simplifies structural design, and meets the needs of different usage scenarios.
Smart Images
Figure CN120491371A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of image acquisition equipment, and in particular to a lens cover. Background Art
[0002] A camera typically includes a lens and a lens cap that protects it. When using a camera, users typically manually remove the lens cap to expose the lens and take photos. Existing methods often remove lens caps by releasing a latch, which can easily lead to loss. While lens caps that rotate open using a hinge address this issue, they often require complex structures to achieve angled positioning. Summary of the Invention
[0003] An embodiment of the present application provides a lens cover, wherein a lens cover upper cover is connected to a lens cover base via a rotating shaft having multiple limit positions, thereby achieving multiple limit positions that are easy to operate with a simple structure.
[0004] In one embodiment of the present application, a lens cover is provided, comprising: A lens cover seat, the lens cover seat being mounted on the lens mount; a lens cover upper cover, the lens cover upper cover sealing the lens cover base and being rotatably connected to the lens cover base via a rotating shaft assembly, the rotating shaft assembly including an elastic element providing a rotational driving force; The rotating shaft assembly has a first limiting angle, at least one second limiting angle, and a second limiting position corresponding to the second limiting angle, the second limiting angle being greater than the first limiting angle, and the rotating shaft assembly is configured as follows: When the included angle between the lens cover upper cover and the lens cover seat is less than or equal to the first limit angle, the lens cover upper cover is driven by external force to a closed position covering the lens cover seat; When the angle between the lens cover upper cover and the lens cover seat is greater than the first limit angle, the lens cover upper cover is driven by the elastic element to a second position forming the second limit angle with the lens cover seat, and is locked in the second position via the second limit position.
[0005] In one embodiment, it includes: A magnetic attraction component, wherein the magnetic attraction component locks the lens cover upper cover in a position covering the lens cover seat; The magnetic force of the magnetic attraction component is configured so that when the angle between the lens cover upper cover and the lens cover seat is less than or equal to the first limit angle, the lens cover upper cover is attracted to the closed position covering the lens cover seat via the magnetic attraction component.
[0006] In one embodiment, the shaft assembly comprises: A fixed shaft, the fixed shaft being fixedly connected to the lens cover seat; an elastic element, the elastic element being sleeved on the fixed shaft and integrally connected to the lens cover upper cover; A limiting assembly, wherein the elastic element is rotatably connected to the fixed shaft via the limiting assembly to drive the lens cover upper cover to rotate around the fixed shaft; The limiting component includes: a first cam, the first cam rotating synchronously with the fixed shaft; a second cam connected to the elastic element; Wherein, the first spiral end surface of the first cam is in axial contact with the second spiral end surface of the second cam; The limiting assembly is arranged on the first spiral end surface and the second spiral end surface.
[0007] In one embodiment, the limiting assembly includes: a first limiting protrusion, the first limiting protrusion protruding from the first spiral end surface; A first limiting groove is recessed from the second spiral end surface, and the first limiting groove accommodates the first limiting protrusion therein to form a first limiting position corresponding to the first limiting angle.
[0008] In one embodiment, the limiting assembly includes: a second limiting protrusion, the second limiting protrusion protruding from the first spiral end surface; At least one second limiting groove is recessed from the second spiral end surface, and the second limiting groove accommodates the second limiting protrusion therein to form the second limiting position.
[0009] In one embodiment, the shaft assembly includes a third limiting angle and a third limiting position corresponding to the third limiting angle, the third limiting angle is greater than the second limiting angle, and the shaft assembly is configured as follows: When the included angle between the lens cover upper cover and the lens cover seat is smaller than the third limiting angle, the lens cover upper cover is driven by an external force to a third position forming the third limiting angle with the lens cover seat, and is locked in the third position via the third limiting position; Wherein, when the lens cover upper cover is in the third position, the lens cover upper cover is in contact with the outer wall of the lens; When the lens cover is in the second position, the lens cover avoids the outer wall of the lens.
[0010] In one embodiment, the limiting assembly includes: a second limiting protrusion, the second limiting protrusion protruding from the first spiral end surface; A second limiting groove is recessed from the second spiral end surface, and the second limiting groove accommodates the second limiting protrusion therein to form the second limiting position.
[0011] In one embodiment, the center of the first cam has a first central hole penetrating the fixed shaft, the first central hole has a non-axisymmetric cross section, and the first cam rotates synchronously with the fixed shaft; The center of the second cam has a second center hole penetrating the fixed shaft, and the second cam has a rotational freedom relative to the fixed shaft.
[0012] In one embodiment, when the angle between the lens cover upper cover and the lens cover seat is less than or equal to the third limiting angle, the elastic element is in a compressed state.
[0013] In one embodiment, the first limiting angle is 15°; and / or One of the second limiting angles is 225°; and / or The third limiting angle is 15°.
[0014] The rotating shaft assembly 30 is used to provide a driving force for the lens cover upper cover 20 to rotate relative to the lens cover base 10. The lens cover upper cover 20 can rotate relative to the lens cover base 10 within an angle range of 0° to 270°. When the lens cover upper cover 20 and the lens cover base 10 form an angle of 0°, the lens cover upper cover 20 abuts against and covers the lens cover base 10. When the lens cover upper cover 20 and the lens cover base 10 form an angle of 270°, the outer surface of the lens cover upper cover 20 abuts against the outer wall of the lens. When the lens cover upper cover 20 and the lens cover base 10 form an angle between 0° and 90°, the lens cover upper cover 20 partially blocks the lens's field of view. When the lens cover upper cover 20 and the lens cover base 10 form an angle between 90° and 270°, the lens cover upper cover 20 does not affect the lens's field of view. At an angle of 270°, the lens cover upper cover 20 does not affect the lens's field of view, but it does affect the user's ability to focus the lens.
[0015] The hinge assembly 30 may have a first stop position corresponding to a first stop angle. The first stop position locks the lens cover upper cover 20 in a position where the included angle with the lens cover mount 10 forms the first stop angle. The second stop angle corresponds to any angle between 0° and 270° (inclusive) that the lens cover upper cover 20 can rotate relative to the lens cover mount 10. The second stop position may be one or more. When the included angle between the lens cover upper cover 20 and the lens cover mount 10 is greater than the first stop angle, the lens cover upper cover 20 rotates to a second position corresponding to the second stop angle due to the rebound force provided by the elastic element 32, and is locked in the second position via the second stop position. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings are merely provided to illustrate and explain the present application, and do not limit the scope of the present application.
[0017] Figure 1a This is a schematic structural diagram of the lens cover of this application.
[0018] Figure 1b This is a partial cross-sectional view of the lens cover of this application.
[0019] Figure 2 This is an exploded diagram of the lens cover of this application.
[0020] Figure 3 This is a schematic structural diagram of the rotating shaft assembly of the lens cover of this application.
[0021] Figure 4a and Figure 4b This is a schematic structural diagram of the limiting assembly of the lens cover of this application. DETAILED DESCRIPTION
[0022] In order to have a clearer understanding of the technical features, purposes and effects of the invention, specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.
[0023] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.
[0024] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure and do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled.
[0025] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.
[0026] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the prerequisite for each other's existence.
[0027] In this document, "equal" and "same" are not strictly limited in the mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use. Unless otherwise specified, the numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges contained therein.
[0028] Example embodiments will now be described more fully with reference to the accompanying drawings.
[0029] refer to Figure 1a 、 Figure 1b ,and Figure 2 As shown, this embodiment provides a lens cover, including: The lens cover seat 10 is mounted on the lens mount; The lens cover upper cover 20 covers the lens cover base 10 and is rotatably connected to the lens cover base 10 via a rotating shaft assembly 30, wherein the rotating shaft assembly 30 includes an elastic element 32 that provides a rotational driving force; The shaft assembly 30 has a first limiting angle, at least one second limiting angle, and a second limiting position corresponding to the second limiting angle, wherein the second limiting angle is greater than the first limiting angle. The shaft assembly 30 is configured as follows: When the included angle between the lens cover upper cover 20 and the lens cover seat 10 is less than or equal to the first limit angle, the lens cover upper cover 20 is driven by an external force to a closed position covering the lens cover seat 10; When the angle between the lens cover upper cover 20 and the lens cover base 10 is greater than the first limit angle, the lens cover upper cover 20 is driven by the elastic element 32 to the second position forming a second limit angle with the lens cover base 10 and is locked in the second position via the second limit position.
[0030] In this example, the lens cover seat 10 and the lens cover upper cover 20 are rotatably connected via a rotating shaft assembly 30, wherein the lens cover seat 10 can be implemented as a structure having a pair of lugs on the outer edge, and the lens cover upper cover 20 can be implemented as a structure having a cylinder on the outer edge, which can be arranged between the pair of lugs, and the rotating shaft assembly 30 is simultaneously passed through the lugs and the cylinder.
[0031] The rotating shaft assembly 30 is used to provide a driving force for the lens cover upper cover 20 to rotate relative to the lens cover base 10. The lens cover upper cover 20 can rotate relative to the lens cover base 10 within an angle range of 0° to 270°. When the lens cover upper cover 20 and the lens cover base 10 form an angle of 0°, the lens cover upper cover 20 abuts against and covers the lens cover base 10. When the lens cover upper cover 20 and the lens cover base 10 form an angle of 270°, the outer surface of the lens cover upper cover 20 abuts against the outer wall of the lens. When the lens cover upper cover 20 and the lens cover base 10 form an angle between 0° and 90°, the lens cover upper cover 20 partially blocks the lens's field of view. When the lens cover upper cover 20 and the lens cover base 10 form an angle between 90° and 270°, the lens cover upper cover 20 does not affect the lens's field of view. At an angle of 270°, the lens cover upper cover 20 does not affect the lens's field of view, but it does affect the user's ability to focus the lens. For example, the focus knob is located relatively close to the rear of the lens cover, which interferes with the user's focusing action when the lens cover is close to or in contact with the outer wall of the lens. Usually, when the lens cover is close to or in contact with the outer wall of the lens, the angle between the lens cover upper cover 20 and the lens cover base 10 is 270 degrees, and of course it can also be an angle close to 270 degrees.
[0032] The first limiting angle of the rotating shaft assembly 30 can be defined as an angle close to 0°, for example, 15°. When the angle between the lens cover upper cover 20 and the lens cover base 10 is less than or equal to the first limiting angle, the lens cover upper cover 20 is driven to a closed position covering the lens cover base 10 by an external force. This external force can be manually applied by an operator or provided by an external component such as a magnetic assembly.
[0033] The hinge assembly 30 may have a first limit position corresponding to the first limit angle, and the first limit position can be used to lock the lens cover upper cover 20 at a position where the angle formed by the lens cover base 10 forms the first limit angle. Optionally, the hinge assembly 30 may not have a limit position for locking the lens cover upper cover 20 at the first limit angle.
[0034] The second limiting angle corresponds to any angle between 0° and 270° (exclusive) that the lens cover upper cover 20 can rotate relative to the lens cover base 10. Preferably, it should be selected from any angle between 90° and 270° (exclusive). Alternatively, it can be selected from any angle between 90° and the angle at which the lens cover approaches or fits against the outer wall of the lens.
[0035] The first limiting angle can be selected to be an angle smaller than the second limiting angle.
[0036] For example, in one embodiment, a second limiting angle is 225°. When the lens cover 20 forms a 225° angle with the lens cover base 10, the lens cover 20 neither blocks the lens's field of view nor abuts against the outer wall of the lens, thus not affecting the user's operation of the lens adjustment mechanism. Therefore, in a specific usage scenario, when the lens cover 20 is limited to the second limiting angle, the user may be adjusting lens parameters, such as focal length, aperture, and other parameters. When the lens cover 20 is limited to the first angle, the user may be shooting, i.e., the user has already fixed the various lens parameters and does not need to adjust the lens. At this time, the lens cover 20 abuts against the outer wall of the lens, and will not affect the user's operation.
[0037] The second limit position may be one or more.
[0038] In one example, when the angle between the lens cover upper cover 20 and the lens cover base 10 is greater than the first limiting angle, the lens cover upper cover 20 can rotate to a second position corresponding to the second limiting angle under the rebound force provided by the elastic element 32, and be locked in the second position via the second limiting position. The rotating shaft assembly 30 can have a first limiting position corresponding to the first limiting angle. In this case, the lens cover upper cover 20 needs to be disengaged from the first position corresponding to the first limiting angle under the action of an external force, specifically, by applying a force in the direction in which the angle between the lens cover upper cover 20 and the lens cover base 10 increases, so that the lens cover upper cover 20 is rotated and locked in the second position under the driving force of the elastic element 32.
[0039] In one example, the shaft assembly 30 has a third limiting angle and a third limiting position corresponding to the third limiting angle, the third limiting angle is greater than the second limiting angle, and the shaft assembly 30 is configured as follows: When the included angle between the lens cover upper cover 20 and the lens cover base 10 is smaller than the third limit angle, the lens cover upper cover 20 is driven by external force to the third position forming the third limit angle with the lens cover base 10 and is locked in the third position through the third limit position.
[0040] In a specific example, the third position corresponding to the third limiting angle is when the outer surface of the lens cover upper cover 20 is in contact with or close to the outer wall of the lens. The third limiting angle can be 270 degrees or another angle that allows it to be in contact with or close to the outer wall of the lens. The third limiting angle can be 270 degrees or an angle greater than the second limiting angle.
[0041] The rotating shaft assembly 30 has a third limiting position corresponding to the third limiting angle, and the lens cover upper cover 20 is locked at the third position forming an angle of 270° with the lens cover base 10 via the third limiting position.
[0042] When the angle between the lens cover upper cover 20 and the lens cover mount 10 is less than the third limiting angle, the lens cover upper cover 20 can be driven to the third position by an external force. In a preferred embodiment, when the angle between the lens cover upper cover 20 and the lens cover mount 10 is greater than or equal to the second limiting angle and less than the third limiting angle, the lens cover upper cover 20 can be driven to the third position by an external force. Furthermore, when the angle between the lens cover upper cover 20 and the lens cover mount 10 is greater than or equal to the second limiting angle and less than the third limiting angle, the lens cover upper cover 20 can be rotated and locked in the second position under the driving force of the elastic element 32.
[0043] The rotating shaft assembly 30 includes: A fixed shaft 31, the fixed shaft 31 is fixedly connected to the lens cover seat 10; The elastic element 32 is sleeved on the fixed shaft 31 and is integrally connected to the lens cover 20; The limiting assembly 33 and the elastic element 32 are rotatably connected to the fixed shaft via the limiting assembly 33 to drive the lens cover upper cover 20 to rotate around the fixed shaft 31 .
[0044] The rotating shaft assembly 30 can be divided into a fixed part and a rotating part. The fixed shaft 31 is the fixed part, and its two ends are supported by a pair of lugs, and the fixed shaft 31 is fixedly connected to the lugs. The connecting hole between the fixed shaft 31 and the lugs can be covered and decorated with a decorative sheet 50.
[0045] In one example, this includes: A magnetic attraction assembly 40 , which locks the lens cover upper cover 20 in a closed position covering the lens cover base 10 ; The magnetic force of the magnetic attraction assembly 40 is configured to attract the lens cover upper cover 20 to a closed position covering the lens cover seat 10 when the angle between the lens cover upper cover 20 and the lens cover seat 10 is less than or equal to the first limit angle.
[0046] In a preferred example, the first limiting angle is 15°.
[0047] Optionally, the locking structure for locking the lens cover upper cover 20 at the position of covering the lens cover base 10 may use a magnetic attraction component 40 or a snap assembly.
[0048] The hinge assembly 30 may have a first stop position corresponding to a first stop angle. The first stop position can lock the lens cover upper cover 20 in a position where the angle formed by the lens cover base 10 forms the first stop angle. Accordingly, the magnetic force of the magnetic attraction assembly 40 can be configured to overcome the locking force exerted by the first stop position on the lens cover upper cover 20, allowing the lens cover upper cover 20 to disengage from the first position and rotate toward the closed position. Alternatively, the driving force for disengaging the lens cover upper cover 20 from the first position can be a manual external force applied by an operator.
[0049] When the buckle assembly is used, the driving force for causing the lens cover upper cover 20 to be separated from the first position and the driving force for causing the lens cover upper cover 20 to be combined with the buckle assembly to be locked in the closed position can both be manual external forces of the operator.
[0050] When the angle is between 0° and the first limit angle, the driving force for rotating the lens cover upper cover 20 to the position of covering the lens cover seat 10 can be the magnetic force of the magnetic suction component 40, the external force of the user, or a combination of the two.
[0051] Combine Figure 3 、 Figure 4a and Figure 4b As shown, the limiting assembly 33 includes: a first cam 331 , the first cam 331 rotates synchronously with the fixed shaft 31 ; a second cam 332 , the second cam 332 being connected to the elastic element 32 ; The first spiral end surface 333 of the first cam 331 is in axial contact with the second spiral end surface 334 of the second cam 332 . The limiting component 33 is disposed on the first spiral end surface 333 and the second spiral end surface 334 .
[0052] The first cam 331 and the second cam 332 are formed as cylinders, and the first cam 331 and the second cam 332 are arranged along the axial direction of the fixed shaft 31, and have a first spiral end face 333 and a second spiral end face 334 on the opposite end faces, respectively, wherein the first spiral end face 333 and the second spiral end face 334 are in contact with each other and have the freedom of relative rotation.
[0053] According to the characteristics of the helical surface, the rotational freedom of the first cam 331 and the second cam 332 can be limited to a rotation range of 360° by the connecting steps of the helical surface.
[0054] Preferably, the limiting component 33 includes: a first limiting protrusion 331 a protruding from the first spiral end surface 333; The first limiting groove 332a is recessed from the second spiral end surface 334, and the first limiting groove 332a accommodates the first limiting protrusion 331a therein to form a first limiting position.
[0055] Optionally, the limiting component 33 includes: A second limiting protrusion 331b, which protrudes from the first spiral end surface 333; At least one second limiting groove 332b is formed, and the second limiting groove 332b is recessed from the second spiral end surface 334. The second limiting groove 332b accommodates the first limiting protrusion 331a therein to form a second limiting position.
[0056] Optionally, the limiting assembly 33 has a third limiting position, which corresponds to a position where the lens cover upper cover 20 and the lens cover seat 10 form a third limiting angle, and the third limiting angle is smaller than the second limiting angle; When the lens cover upper cover 20 is limited to the third limit position, the lens cover upper cover 20 rotates to a position covering the lens cover seat 10 in response to an external force; The limiting assembly 33 includes: A second limiting protrusion 331b, which protrudes from the first spiral end surface 333; The third limiting groove 332c is recessed from the second spiral end surface 334, and the third limiting groove 332c accommodates the second limiting protrusion 331b therein to form a third limiting position.
[0057] In a specific example, the angular difference between the first limiting protrusion 331a and the second limiting protrusion 331b is 180°, and the angular difference between the first limiting groove 332a and the third limiting groove 332c is 180°.
[0058] The center of the first cam 331 has a first center hole 335 that penetrates the fixed shaft 31. The first center hole 335 has a non-axisymmetric cross section. The first cam 331 rotates synchronously with the fixed shaft 31. The second cam 332 has a second central hole 336 at its center which penetrates the fixed shaft 31 . The second cam 332 has a rotational freedom relative to the fixed shaft 31 .
[0059] When the included angle between the lens cover upper cover 20 and the lens cover base 10 is less than or equal to the first included angle, the elastic element 32 is in a compressed state.
[0060] The lens cover of this example can have the following operating conditions: 1) 0~15° engaged state, the state remains engaged at this angle; 2) 15-225° (to ensure that the focus is not affected): After the hinge lock is released, it will automatically open to the 225° angle limit. It can be manually bent to any angle in the middle and it will stop near 225°. 3) 225°~270° (manual limit): This process requires manual bending to 270°, and it can be self-locked near 270°, meeting the 120g load requirement, and ensuring that the opening and closing force value decays by less than 20% after more than 5000 times; 4) When closed: between 225° and 15°: any angle can automatically rebound to 225° 5) When closed: When the angle is less than 15°, the lens cover will automatically close under the force of the shaft.
[0061] The lens cover assembly in this example is simple to assemble. Align the hinges of the lens cover top and base. With the lens cover top fully open, insert the lens cover hinge and secure with screws. Use lens cover trim sheets to cover the ends of the hinge, ensuring an aesthetically pleasing overall appearance. Finally, install cushioning pads at the corresponding positions of the lens cover top and base. These cushioning pads cushion the lens cover top and base from any impact when engaged at an angle of 0-15 degrees, reducing engagement noise and protecting the appearance from any damage caused by the two components engaging.
[0062] The core of the rotating shaft is the friction surface of the inner and outer cams. The friction surface of the cam on the inner cam is a spiral ascending surface, and it is provided with three limiting grooves. The number of limiting grooves is equal to the number of required limiting angles. However, the total number should not exceed four, as exceeding it will greatly reduce the life of the cam. There are two limiting protrusions on the outer cam, one protrusion to ensure the 0° suction effect, and one protrusion to ensure the 270° self-locking ability. To improve the self-locking ability, the depth of the cam protrusion and groove must be increased. The deeper the depth, the greater the self-locking force, but the corresponding wear will be accelerated. The center of the inner cam, which is a movable part, is circular and can rotate relative to the fixed shaft after mating. The center of the outer cam is special-shaped. After mating with the fixed shaft, it can ensure that the outer cam and the fixed shaft are fixed and cannot rotate.
[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. A lens cover, characterized in that: include: A lens cover seat (10), wherein the lens cover seat (10) is mounted on the lens mount; a lens cover upper cover (20), the lens cover upper cover (20) covers the lens cover base (10) and is rotatably connected to the lens cover base (10) via a rotating shaft assembly (30), the rotating shaft assembly (30) including an elastic element (32) for providing a rotational driving force; The rotating shaft assembly (30) has a first limiting angle, at least one second limiting angle, and a second limiting position corresponding to the second limiting angle, the second limiting angle being greater than the first limiting angle, and the rotating shaft assembly (30) is configured as follows: When the included angle between the lens cover upper cover (20) and the lens cover seat (10) is less than or equal to the first limiting angle, the lens cover upper cover (20) is driven by external force to a closed position covering the lens cover seat (10); When the included angle between the lens cover upper cover (20) and the lens cover seat (10) is greater than the first limiting angle, the lens cover upper cover (20) is driven via the elastic element (32) to a second position forming the second limiting angle with the lens cover seat (10), and is locked in the second position via the second limiting position.
2. The lens cover according to claim 1, wherein: include: A magnetic attraction component (40), wherein the magnetic attraction component (40) locks the lens cover upper cover (20) in a position covering the lens cover seat (10); The magnetic force of the magnetic attraction component (40) is configured such that when the angle between the lens cover upper cover (20) and the lens cover seat (10) is less than or equal to the first limiting angle, the lens cover upper cover (20) is attracted to a closed position covering the lens cover seat (10) via the magnetic attraction component (40).
3. The lens cover according to claim 1, wherein: The rotating shaft assembly (30) comprises: A fixed shaft (31), the fixed shaft (31) being fixedly connected to the lens cover seat (10); an elastic element (32), the elastic element (32) being sleeved on the fixed shaft (31) and integrally connected to the lens cover upper cover (20); A limiting assembly (33), wherein the elastic element (32) is rotatably connected to the fixed shaft via the limiting assembly (33) to drive the lens cover upper cover (20) to rotate around the fixed shaft (31); The limiting component (33) includes: a first cam (331), the first cam (331) rotating synchronously with the fixed shaft (31); a second cam (332), the second cam (332) being connected to the elastic element (32); The first spiral end surface (333) of the first cam (331) and the second spiral end surface (334) of the second cam (332) are in axial contact with each other; The limiting assembly (33) is arranged on the first spiral end surface (333) and the second spiral end surface (334).
4. The lens cover according to claim 3, wherein: The limiting component (33) includes: a first limiting protrusion (331a), the first limiting protrusion (331a) protruding from the first spiral end surface (333); A first limiting groove (332a) is recessed from the second spiral end surface (334), and the first limiting groove (332a) accommodates the first limiting protrusion (331a) therein to form a first limiting position corresponding to the first limiting angle.
5. The lens cover according to claim 3, wherein: The limiting component (33) includes: a second limiting protrusion (331b), the second limiting protrusion (331b) protruding from the first spiral end surface (333); At least one second limiting groove (332b), the second limiting groove (332b) is recessed from the second spiral end surface (334), and the second limiting groove (332b) accommodates the second limiting protrusion (331b) therein to form the second limiting position.
6. The lens cover according to claim 3, wherein: include: The rotating shaft assembly (30) has a third limiting angle and a third limiting position corresponding to the third limiting angle, the third limiting angle being greater than the second limiting angle, and the rotating shaft assembly (30) is configured as follows: When the included angle between the lens cover upper cover (20) and the lens cover seat (10) is smaller than the third limiting angle, the lens cover upper cover (20) is driven by an external force to a third position forming the third limiting angle with the lens cover seat (10), and is locked in the third position via the third limiting position; Wherein, when the lens cover upper cover (20) is in the third position, the lens cover upper cover (20) is in contact with the outer wall of the lens; When the lens cover upper cover (20) is in the second position, the lens cover upper cover (20) avoids the outer wall of the lens.
7. The lens cover according to claim 6, wherein: The limiting component (33) includes: a second limiting protrusion (331b), the second limiting protrusion (331b) protruding from the first spiral end surface (333); A third limiting groove (332c) is recessed from the second spiral end surface (334), and the third limiting groove (332c) accommodates the second limiting protrusion (331b) therein to form the third limiting position.
8. The lens cover according to claim 3, wherein: The center of the first cam (331) has a first center hole (335) penetrating the fixed shaft (31), the first center hole (335) having a non-axisymmetric cross section, and the first cam (331) rotates synchronously with the fixed shaft (31); The center of the second cam (332) has a second center hole (336) penetrating the fixed shaft (31), and the second cam (332) has a degree of freedom of rotation relative to the fixed shaft (31).
9. The lens cover according to claim 6, wherein: When the included angle between the lens cover upper cover (20) and the lens cover seat (10) is less than or equal to the third limiting angle, the elastic element (32) is in a compressed state.
10. The lens cover according to claim 6, wherein: The first limiting angle is 15°; and / or One of the second limiting angles is 225°; and / or The third limiting angle is 15°.