Reflection driving assembly and camera module

Abstract

This application discloses a reflection driving assembly and a camera module. The reflection driving assembly includes: a reflection base; a carrier rotatably mounted on the reflection base and adapted to carry a reflection element, the reflection element being adapted to reflect light propagating in a direction parallel to a first axis to propagate in a direction parallel to a second axis, the second axis intersecting the first axis; and a rotation position sensing unit, including a first sensing magnet and a first rotation sensing element disposed opposite to each other, the first rotation sensing element being disposed at the bottom of the reflection base, and the first sensing magnet being disposed on the side of the carrier near the bottom of the reflection base in a direction parallel to the first axis; wherein, a magnetic yoke is provided at the bottom of the reflection base, the magnetic yoke is provided with a yoke opening, and the first rotation sensing element is disposed within the yoke opening, such that the first rotation sensing element and the first sensing magnet are disposed opposite to each other in a direction parallel to the first axis. It has the characteristics of being able to sense the rotation position of the reflection element relative to the reflection base and providing closed-loop control.

Description

Technical Field

[0001] This application relates to the field of camera module technology, specifically to a reflection driving component and a camera module. Background Technology

[0002] With the widespread adoption of mobile electronic devices, the technology behind camera modules used in these devices to help users capture images has developed and progressed rapidly. Currently, consumers in the market have an increasing demand for long-distance shooting capabilities from camera modules integrated into mobile electronic devices.

[0003] Camera modules with telephoto capabilities require a long focal length to capture clear images of distant subjects. However, a long focal length means a longer camera module. Therefore, at least one reflective module can be incorporated into the camera module to fold the optical path, thus preventing the camera module from becoming too long.

[0004] The reflection module uses reflective elements to fold the optical path and has corresponding reflection driving components to adjust the position of the reflective elements, thereby adjusting the optical path and further improving the imaging function of the camera module. To achieve closed-loop control of the reflection module, it is necessary to sense the position of the reflective elements. Summary of the Invention

[0005] One object of this application is to provide a reflective drive assembly capable of sensing the position of a reflective element in order to achieve closed-loop control.

[0006] Another objective of this application is to provide a camera module that can fold the optical path and has good imaging capabilities.

[0007] To achieve one of the objectives of this application, the technical solution adopted in this application is a reflection driving component, which includes:

[0008] Reflector base;

[0009] A carrier is rotatably mounted on the reflective base and is adapted to carry a reflective element, the reflective element being adapted to reflect light propagating in a direction parallel to a first axis to propagate in a direction parallel to a second axis, the second axis intersecting the first axis;

[0010] The rotation position sensing unit includes a first sensing magnet and a first rotation sensing element disposed opposite to each other. The first rotation sensing element is disposed at the bottom of the reflective base, and the first sensing magnet is disposed on the side of the carrier near the bottom of the reflective base along a direction parallel to the first axis.

[0011] The bottom of the reflective base is provided with a magnetic yoke, the magnetic yoke is provided with a magnetic yoke opening, and the first rotation sensing element is disposed in the magnetic yoke opening, such that the first rotation sensing element and the first sensing magnet are disposed opposite each other in a direction parallel to the first axis.

[0012] In some embodiments, along a direction parallel to the first axis, a portion of the projection of the first sensing magnet overlaps with the projections of the first rotation sensing element and the yoke opening, and another portion of the projection of the first sensing magnet overlaps with the projection of the magnetic attraction yoke around the yoke opening.

[0013] In some embodiments, along a direction parallel to the second axis, the size of the yoke opening is larger than the size of the first sensing magnet; in a direction parallel to the third axis, the size of the first sensing magnet is larger than the size of the yoke opening, and the third axis is perpendicular to the first axis and the second axis.

[0014] In some embodiments, during the rotation of the carrier around the third axis, the first sensing magnet is projected in a direction parallel to the first axis. The size of this projection in the direction parallel to the second axis is smaller than the size of the magnetic yoke opening. When the carrier does not rotate relative to the reflective base, the size of the magnetic yoke opening in the direction parallel to the second axis is at least 0.2 mm larger than the first sensing magnet.

[0015] In some embodiments, the distance between the first rotation sensing element and the carrier in a direction parallel to the first axis is greater than or equal to the distance between the magnetic yoke and the carrier; or, the distance between the first rotation sensing element and the carrier in a direction parallel to the first axis is less than the distance between the magnetic yoke and the carrier.

[0016] In some embodiments, a flexible protective layer is further included, which covers the first rotation sensing element.

[0017] In some embodiments, the system further includes a frame, a first support portion, and a second support portion. The frame is disposed on the reflective base and is adapted to support the carrier. The frame is connected to the reflective base via the first support portion, allowing the frame to rotate relative to the reflective base about a first axis. The carrier is connected to the frame via the second support portion, allowing the carrier to rotate relative to the frame about a third axis, which is perpendicular to the first axis and the second axis.

[0018] In some embodiments, one of the frame and the reflective base is provided with an arc-shaped groove, and the other is provided with three auxiliary grooves. The two ends of the arc-shaped groove extend to two opposite sides of the bottom of the frame or the bottom of the reflective base along a direction parallel to the third axis. The three auxiliary grooves are spaced apart along the arc-shaped groove. The first support includes three auxiliary balls disposed between each of the auxiliary grooves and the arc-shaped groove. The first axis passes through the center of the virtual circle where the arc-shaped groove is located. The auxiliary balls cooperate with the arc-shaped groove and the auxiliary grooves to guide the frame to rotate relative to the reflective base around the first axis.

[0019] In some embodiments, the three auxiliary grooves include a first limiting groove, a second limiting groove, and a loose fitting accommodating groove, wherein the first limiting groove and the second limiting groove are perpendicular to the limiting direction of their respective auxiliary balls.

[0020] In some embodiments, the frame is provided with two lower rotating shaft grooves, and the carrier is provided with two upper rotating shaft grooves. The two lower rotating shaft grooves are arranged on two opposite sides of the frame along a direction parallel to the third axis, and the two upper rotating shaft grooves are respectively arranged opposite the two lower rotating shaft grooves. The second support portion includes two rotating shaft balls disposed between each lower rotating shaft groove and the corresponding upper rotating shaft groove. The third axis passes through the two rotating shaft balls. The rotating shaft balls cooperate with the upper rotating shaft groove and the lower rotating shaft groove to guide the carrier to rotate relative to the frame around the third axis and project along a direction parallel to the first axis. The projection of the third axis passes through the two opposite sides of the projection of the arc-shaped groove. The first sensing magnet is disposed in the area surrounded by the arc-shaped groove.

[0021] In some embodiments, the rotation position sensing unit further includes a second rotation sensing element and a second sensing magnet. The second rotation sensing element is disposed on one side of the reflective base along a direction parallel to the third axis. The second sensing magnet is disposed opposite to the second rotation sensing element along a direction parallel to the third axis. The second sensing magnet is disposed on one side of the carrier along a direction parallel to the third axis. A counterweight element is disposed on the other opposite side of the carrier. The counterweight element is disposed opposite to the second sensing magnet along a direction parallel to the third axis.

[0022] In some embodiments, the projection is along a direction parallel to the third axis, the second support is disposed on one side of the first axis along a direction parallel to the second axis, and the second sensing magnet is disposed on the carrier and disposed on the other opposite side of the first axis along a direction parallel to the second axis.

[0023] In some embodiments, a reflective driving unit is further included, adapted to drive the carrier to rotate relative to the base about the first axis and the third axis, the third axis being perpendicular to the first axis and the second axis; the reflective driving unit includes a first rotating magnet and a first rotating coil for driving the carrier to rotate about the first axis, and a second rotating magnet and a second rotating coil for driving the carrier to rotate about the third axis, the first rotating magnet and the first rotating coil being disposed opposite to each other along the second axis, and the second rotating magnet and the second rotating coil being disposed opposite to each other along the second axis.

[0024] To achieve one of the objectives of this application, the technical solution adopted in this application is a camera module, which includes:

[0025] The transmitting module includes a reflective element and any of the aforementioned reflective driving components;

[0026] Lens module, the lens module being held on the light reflection path of the reflective module; and

[0027] An imaging module receives light emitted from the lens module and performs imaging.

[0028] Compared with existing technologies, the advantages of this application are as follows: First, a reflective element is set in the reflective module, folding the optical path of the entire camera module, which helps to reduce the size of the camera module in the length direction. Furthermore, a reflective driving component is provided to adjust the position of the reflective element, which facilitates functions such as image stabilization and camera angle adjustment of the camera module, achieving better imaging results. Moreover, a rotation position sensing unit is provided to accurately sense the position of the reflective element, which facilitates closed-loop control of the reflective module. Even further, the first sensing magnet is reused as a reflective magnetic attraction unit, which, in conjunction with the magnetic yoke, adsorbs the carrier onto the reflective base, simplifying the structure and reducing costs. Attached Figure Description

[0029] Figure 1 This is a cross-sectional structural diagram of the camera module in some embodiments of this application;

[0030] Figure 2 This is an exploded view of the reflection module in some embodiments of this application;

[0031] Figure 3 This is an exploded view of the reflection driving component in some embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the reflective base in some other embodiments of this application;

[0033] Figure 5 This is a partial structural diagram of the reflection module with respect to the bottom of the frame in some embodiments of this application;

[0034] Figure 6 This is a cross-sectional structural diagram of the reflection module in some embodiments of this application;

[0035] Figure 7 and Figure 8 This is a schematic diagram illustrating the effect of a magnetic yoke (magnetic sheet) on magnetic difference.

[0036] Figure 9 This is a partial structural diagram of the reflection module with respect to the second sensing magnet in some embodiments of this application;

[0037] Figure 10 This is a partial structural diagram of the reflection module with respect to the second sensing magnet in some other embodiments of this application;

[0038] In the diagram: Y, First Axis; X, Second Axis; Z, Third Axis; 10, Reflection Module; 11, Reflection Element; 18, Light Reflecting Surface; 12, Reflection Drive Assembly; 121, Reflection Base; 1211, Reflection Substrate; A, Virtual Circle; 1212, Side of First Reflection Base; 1213, Side of Second Reflection Base; 1214, Side of Third Reflection Base; 1216, Auxiliary Groove; 12161, First Limiting Groove; 12162, Second Limiting Groove; 12163, Loose Fitting Reception Groove; 122, First Support Part; 123, Frame; 1231, Frame Body; 12311, Clearance Hole; 12312, Arc Groove; 1232, Side of First Frame; 1233, Side of Second Frame; 124, Second Support Part; 125, Carrier; 125 1. Carrier main body; 12511. Carrier base; 12512. Third carrier side; 1252. First carrier side; 1253. Second carrier side; 126. Reflection driving part; 1261. First rotating magnet; 1262. First rotating coil; 1263. Second rotating magnet; 1264. Second rotating coil; 127. Reflective magnetic attraction part; 1274. Magnetic attraction yoke; 12741. Magnetic yoke opening; 128. Rotation position sensing part; 1281. First rotation sensing element; 1282. Second rotation sensing element; 1283. First sensing magnet; 1284. Second sensing magnet; 20. Lens module; 21. Optical lens; 22. Lens driving assembly; 30. Imaging module; 31. Photosensitive assembly; 32. Filter assembly. Detailed Implementation

[0039] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0040] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0041] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0042] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0043] like Figure 1 As shown, this application provides a camera module, which includes a reflection module 10, a lens module 20, and an imaging module 30. The reflection module 10 is used to reflect light propagating in a direction parallel to the first axis Y to a direction propagating in a direction parallel to the second axis X, wherein the first axis Y and the second axis X are intersected. The lens module 20 is held on the light reflection path of the reflection module 10 and is used to converge the light. The imaging module 30 is held on the path of the imaging light emitted from the lens module 20 and is used to receive the imaging light emitted from the lens module 20 for imaging.

[0044] In some embodiments, the second axis X direction is generally the length direction of the camera module. The reflection module 10, lens module 20, and imaging module 30 are sequentially arranged along the second axis X direction. The arrangement of the reflection module 10 allows it to receive incident light from the first axis Y direction and reflect it to the second axis X direction, thereby reducing the size of the camera module in the second axis X direction, i.e., the length direction of the camera module. Further, the first axis Y direction is generally the height direction of the camera module; in other words, the first axis Y and the second axis X are spatially perpendicular. In other words, the reflection module 10 is adapted to reflect the incident light at a 90° angle before re-emission. In other embodiments, the first axis Y and the second axis X may also form an angle other than 90° in space. Additionally, in this application, the first axis Y and the second axis X can be coplanar or non-coplanar.

[0045] In some embodiments, the lens module 20 includes an optical lens 21 for converging light and a lens base for supporting the entire lens module 20. The optical lens 21 may include one or more optical lenses, which may be fixedly or movably disposed relative to the lens base. Furthermore, the lens module 20 also includes a lens drive assembly 22 for driving the optical lenses to move relative to the lens base, thereby achieving functions such as optical image stabilization and focusing by driving the optical lenses to move.

[0046] It is understood that the optical axis of the optical lens is set along the second axis X. Furthermore, for ease of description, this application also defines a third axis Z, which is perpendicular to the first axis Y and the second axis X.

[0047] It is worth mentioning that in this application, the perpendicularity of two axes can include the following two types: one is that the two axes intersect in the same plane and the angle of intersection is a right angle, forming a traditional perpendicular relationship; the other is that the two axes are located in different planes, and although they do not intersect, their respective direction vectors are perpendicular to each other, forming a spatial perpendicular relationship. In other words, the perpendicular relationship between any two axes among the first axis Y, the second axis X, and the third axis Z can be intersecting or spatial. When they intersect, the angle of intersection is a right angle, forming a traditional perpendicular relationship; when they do not intersect, their respective direction vectors are perpendicular to each other, forming a spatial perpendicular relationship. In an example, such as... Figure 1 As shown, the first axis Y and the third axis Z do not intersect each other, the direction vectors of the first axis Y and the third axis Z are perpendicular to each other, and the first axis Y and the third axis Z are spatially perpendicular to each other; furthermore, the second axis X and the third axis Z do not intersect each other, the direction vectors of the second axis X and the third axis Z are perpendicular to each other, and the second axis X and the third axis Z are spatially perpendicular to each other.

[0048] In some embodiments, the imaging module 30 includes a photosensitive component 31 for generating an image based on the imaging light. Furthermore, the imaging module 30 also includes a filter component 32 for filtering stray light from the imaging light to improve image quality.

[0049] like Figures 2-10 As shown, this application further discloses the structure of the reflection module 10.

[0050] In some embodiments, the reflection module 10 includes a reflection element 11 and a reflection driving assembly 12. The reflection element 11 is adapted to reflect light propagating in a direction parallel to the first axis Y to a direction propagating in a direction parallel to the second axis X, where the second axis X intersects the first axis Y. The reflection driving assembly 12 is used to drive the reflection element 11 to achieve functions such as optical image stabilization and camera angle adjustment. More specifically, the reflection driving assembly 12 is adapted to drive the reflection element 11 to rotate along the first axis Y and the third axis Z to achieve multi-dimensional adjustment.

[0051] In some embodiments, the reflective element 11 is specifically a prism or a mirror. The reflective element 11 includes at least one light-reflecting surface 18 for turning light. The light-reflecting surface 18 is inclined. The carrier 125 is provided with at least one inclined mounting surface corresponding to the light-reflecting surface 18. The reflective element 11 is fixed on the carrier 125 to move synchronously with the carrier 125.

[0052] In some embodiments, reference Figure 2 , Figure 3 The reflection drive assembly 12 includes a reflection base 121, a carrier 125, a reflection drive unit 126, and a rotation position sensing unit 128. The reflection base 121 serves as the support structure for the entire reflection drive assembly 12, providing a stable mounting platform for other components within the assembly. The reflection base 121 can be integrally or separately mounted with the lens base. The carrier 125 is movably mounted on the reflection base 121 and is adapted to support the reflection element 11. The movement of the carrier 125 relative to the reflection base 121 enables the movement of the reflection element 11 relative to the base. The reflection drive unit 126 is adapted to drive the carrier 125 to move relative to the reflection base 121. The rotation position sensing unit 128 senses the position of the carrier 125 and the reflection element 11 relative to the reflection base 121, thereby enabling closed-loop control of the position of the reflection element 11 in conjunction with the reflection drive unit 126.

[0053] In some embodiments, the carrier 125 is rotatably mounted on the reflective base 121, and the reflective drive unit 126 is adapted to drive the carrier 125 to rotate relative to the base about a first axis Y and a third axis Z perpendicular to both the first axis Y and the second axis X. Correspondingly, the rotation position sensing unit 128 includes a first sensing magnet 1283 and a first rotation sensing element 1281 disposed opposite each other in a direction parallel to the first axis Y, and a second sensing magnet 1284 and a second rotation sensing element 1282 disposed opposite each other in a direction perpendicular to the first axis Y. The first rotation sensing element 1281 is disposed at the bottom of the reflective base 121, and the first sensing magnet 1283 is disposed on the side of the carrier 125 near the bottom of the reflective base 121 in a direction parallel to the first axis Y, or on the side of the carrier 125 away from the reflective element 11. In this application, the reflective element 11 folds the optical path of the entire camera module, which helps to reduce the size of the camera module in the length direction. Furthermore, the reflection drive assembly 12 is provided to adjust the position of the reflection element 11, which is beneficial for realizing functions such as image stabilization and camera angle adjustment of the camera module, thereby achieving better imaging results. Even further, the rotation position sensing unit 128 is provided to accurately sense the position of the reflection element 11, which is beneficial for realizing closed-loop control of the reflection module 10.

[0054] In some embodiments, the first rotation sensing element 1281 acquires the first magnetic field information of the first sensing magnet 1283 to obtain the rotation angle of the carrier 125 about the third axis Z, and the second rotation sensing element 1282 acquires the second magnetic field information of the second sensing magnet 1284 to obtain the rotation angle of the carrier 125 about the first axis Y. Based on the magnetic field information obtained by the rotation sensing elements, the position information of the carrier 125 can be calculated, and the magnitude of the driving current required for the reflective drive unit 126 to drive the carrier 125 to rotate to the corresponding position can be calculated. This allows for real-time adjustment and precise control of the position of the carrier 125, making the actual rotation of the carrier 125 more consistent with the expected target.

[0055] In some embodiments, the reflective base 121 includes a reflective substrate 1211 and reflective base sides disposed around the reflective substrate 1211. Specifically, the reflective base sides include a first reflective base side 1212, a second reflective base side 1213, and a third reflective base side 1214 disposed sequentially. The first reflective base side 1212 and the third reflective base side 1214 are disposed opposite to each other along the third axis Z direction. The second reflective base side 1213 connects the first reflective base side 1212 and the third reflective base side 1214 and is disposed opposite to the lens module 20 along the second axis X direction. Correspondingly, the carrier 125 includes a carrier body 1251, a first carrier side portion 1252, and a second carrier side portion 1253. The first carrier side portion 1252 and the second carrier side portion 1253 are respectively disposed on two opposite sides of the carrier body 1251 along the third axis Z. Further, the carrier body 1251 may include a carrier base 12511 and a third carrier side portion 12512. The carrier base 12511 is disposed above the reflective base 1211, and the third carrier side portion 12512 is disposed opposite to the second reflective base side portion 1213. The three carrier side portions are disposed around the carrier base 12511 to form a reflective element receiving cavity suitable for mounting the reflective element 11.

[0056] In some embodiments, the reflection driving assembly 12 further includes a support structure disposed between the carrier 125 and the reflective base 121 to enable the carrier 125 to move relative to the reflective base 121.

[0057] In some embodiments, the support structure specifically includes a frame 123, a first support portion 122, and a second support portion 124. The frame 123 is disposed on the reflective base 121 and is adapted to support the carrier 125. The frame 123 and the reflective base 121 are connected through the first support portion 122, allowing the frame 123 to rotate relative to the reflective base 121 about a first axis Y. The carrier 125 and the frame 123 are connected through the second support portion 124, allowing the carrier 125 to rotate relative to the frame 123 about a third axis Z, thereby enabling the carrier 125 to rotate relative to the reflective base 121 about both the first axis Y and the third axis Z. Of course, in other embodiments, the frame 123 may rotate relative to the reflective base 121 about the third axis Z, while the carrier 125 rotates relative to the frame 123 about the first axis Y. Both of these methods add the frame 123, allowing the rotation about the first axis Y and the rotation about the third axis Z to be controlled separately, enabling the carrier 125 and its reflective element 11 to rotate precisely about either the first axis Y or the third axis Z. Of course, in addition to these two methods, the support structure can also be set as other frameless structures.

[0058] In some embodiments, the frame 123 specifically includes a frame body 1231, a first frame side 1232, and a second frame side 1233, which are disposed on opposite sides of the frame body 1231 along the third axis Z. The frame body 1231 is rotatably connected to the reflective substrate 1211 via a first support 122 to support the frame 123, and the frame 123 can rotate relative to the reflective substrate 121 about the first axis Y. The first carrier side 1252 of the carrier 125 is rotatably connected to the first frame side 1232 via a second support 124, and the second carrier side 1253 of the carrier 125 is rotatably connected to the second frame side 1233 of the frame 123 via the second support 124 to support the carrier 125 on the frame 123 and enable the carrier 125 to rotate relative to the frame 123 about the third axis Z.

[0059] In some embodiments, reference Figures 2-4One of the frame 123 and the reflective base 121 is provided with an arc-shaped groove 12312, and the other is provided with three auxiliary grooves 1216. The arc-shaped groove 12312 and the three auxiliary grooves 1216 are arranged opposite to each other, and the two ends of the arc-shaped groove 12312 extend to the bottom of the frame 123 or the bottom of the reflective base 121 along two opposite sides in a direction parallel to the third axis Z. The three auxiliary grooves 1216 are spaced apart along the arc-shaped groove 12312. The first support part 122 includes three auxiliary balls disposed between each auxiliary groove 1216 and the arc-shaped groove 12312. The first axis Y passes through the center of the virtual circle A where the arc-shaped groove 12312 is located. The auxiliary balls cooperate with the arc-shaped groove 12312 and the auxiliary grooves 1216 to guide the frame 123 to rotate relative to the reflective base 121 around the first axis Y. It should be understood that the arrangement of the first support portion 122 can reserve a certain space in the area surrounded by the arc-shaped groove 12312 for installing components that need to be placed between the bottom of the frame 123 and the bottom of the reflective base 121, such as providing installation space for the first sensing magnet 1283 and the first rotation sensing element 1281, which is beneficial to achieving a compact structure of the reflective module 10. It is understood that setting three auxiliary grooves 1216 means that three auxiliary balls are also set. The three auxiliary balls can provide a supporting plane for the frame 123, so that the frame 123 is stably supported. The three auxiliary grooves 1216 are spaced apart along the arc-shaped groove 12312, and the first axis Y passes through the center of the virtual circle A where the arc-shaped groove 12312 is located, ensuring that the frame 123 rotates around the first axis Y. In some embodiments, there can be more than three auxiliary balls, and correspondingly, there can be more than three auxiliary grooves 1216.

[0060] In some embodiments, the central angle of the arc groove 12312 is greater than 180°. In other words, the arc groove 12312 is larger than a semicircle. The arc groove 12312 is set to be larger, and the auxiliary grooves 1216 can be spaced far apart. For example, the three auxiliary grooves 1216 can be respectively set at the two ends and the midpoint of the arc groove 12312 to ensure that the center of gravity of the frame 123, the carrier 125, the reflective element 11 and other components on the frame 123 falls within the surrounding range of the arc groove 12312, or in other words, falls within the triangular area formed by the line connecting the three auxiliary grooves 1216, so as to provide stable support for the frame 123.

[0061] In some embodiments, the projection along the direction parallel to the first axis Y, the projection of the third axis Z passes through the two opposite sides of the projection of the arc groove 12312, and the first sensing magnet 1283 is positioned in the area surrounded by the arc groove 12312 corresponding to the position of the third axis Z.

[0062] Furthermore, at least two of the three auxiliary grooves 1216 are designed as directional limiting grooves to restrict the movement of the frame 123 in a specific direction, thereby improving the accuracy and stability of the frame 123's rotation. In some specific embodiments, the three auxiliary grooves 1216 include a first limiting groove 12161, a second limiting groove 12162, and a loose fitting accommodating groove 12163. The first limiting groove 12161 and the second limiting groove 12162 are perpendicular to the limiting direction of their respective auxiliary balls. For example, one limiting groove is a straight groove with its length direction parallel to the second axis X, and the other limiting groove is a straight groove with its length direction parallel to the third axis Z. In this way, the two limiting grooves can prevent the frame 123 from translating relative to the reflective base 121 in the direction of the third axis Z or the direction of the second axis X. Specifically, the first limiting groove 12161 can extend in a direction parallel to the third axis Z, and the second limiting groove can extend in a direction parallel to the second axis X. The limiting groove can be a straight groove extending in other directions, or a non-linear shape, and the number of limiting grooves can be two or more. The loose-fit accommodating groove 12163 refers to a accommodating groove whose size is slightly larger than the auxiliary ball, and the auxiliary ball has at least two degrees of freedom of movement within the accommodating groove, in order to reduce frictional resistance with the auxiliary ball and also reduce the assembly difficulty of the auxiliary ball. Of course, only directional limiting grooves can be provided, without the loose-fit accommodating groove 12163.

[0063] More specifically, the first limiting groove 12161 and the second limiting groove 12162 are based on the virtual circle A where the arc groove 12312 is located, such as Figure 4 The central angle is set at 90° intervals as shown, or as follows: Figure 2 The central angles are set at 180° intervals as shown. It is easy to understand that the number of auxiliary grooves 1216 can also be set to more than three. It should be understood that the first limiting groove 12161 and the second limiting groove 12162 are set at 180° intervals based on the virtual circle A where the arc groove 12312 is located, so that even if the first limiting groove 12161 and the second limiting groove 12162 are set in a direction parallel to the third axis Z, a better limiting effect can be achieved.

[0064] In some embodiments, the second support portion 124 includes a rotating ball bearing, the frame 123 is provided with two lower rotating grooves, and the carrier 125 is provided with two upper rotating grooves. The two lower rotating grooves are provided on two opposite sides of the frame 123 in a direction parallel to the third axis Z, and the two upper rotating grooves are respectively provided opposite to the two lower rotating grooves. The second support portion 124 includes two rotating balls disposed between each lower rotating groove and the corresponding upper rotating groove. The third axis Z passes through the two rotating balls, and the rotating balls cooperate with the upper rotating groove and the lower rotating groove to guide the carrier 125 to rotate relative to the frame 123 around the third axis Z.

[0065] In some embodiments, the reflective drive assembly 12 further includes a reflective magnetic attraction part 127, which includes a first reflective magnetic attraction member disposed on the carrier 125 and a second reflective magnetic attraction member disposed on the reflective base 121. The two magnetic attraction members are mutually attracted, so that the carrier 125 can be magnetically attracted to the reflective base 121 through the support structure, or in other words, the carrier 125 and the reflective base 121 are clamped together by the support structure. The first reflective magnetic attraction member and the second reflective magnetic attraction member are preferably disposed on the reflective base 1211 and the carrier base 12511, and one of them is a magnet, and the other is a magnetically conductive material suitable for being attracted by a magnet, such as a magnet or a magnetic yoke suitable for being attracted by a magnet.

[0066] In some embodiments, the reflection drive unit 126 includes a first rotating magnet 1261 and a first rotating coil 1262 for driving the carrier 125 to rotate about a first axis Y, and a second rotating magnet 1263 and a second rotating coil 1264 for driving the carrier 125 to rotate about a third axis Z. The rotating magnets and their corresponding rotating coils are arranged opposite each other along the second axis X. Specifically, the rotating coils are concentrated on the second reflective base side 1213 of the reflective base 121, and the rotating magnets are concentrated on the third carrier side 12512 of the carrier 125. The rotating coils and rotating magnets are concentrated on the side of the reflective element 11 away from the lens module 20 along the second axis X to reduce electromagnetic interference generated by the reflection drive unit 126 on other devices (including devices other than this camera module) arranged on the other side of the reflection drive assembly 12. The rotating coils are arranged on the reflective base 121 to facilitate electrical connection. Specifically, the rotating coil can be electrically connected to the imaging module 30 behind it via a circuit board mounted on the reflector base 121 or a conductive insert that is injection molded inside the reflector base 121.

[0067] In some embodiments, two first rotating magnets 1261 are provided, and a single second rotating magnet 1263 is provided. The two first rotating magnets 1261 are symmetrically arranged on opposite sides of the second rotating magnet 1263 along a direction parallel to the third axis Z. This can balance the distribution of gravity and ensure the torque balance of the second rotating magnets 1263 on both sides, which is beneficial to improving the rotational stability of the carrier 125 when it is driven.

[0068] In some embodiments, refer to Figure 5 , Figure 6The rotation position sensing unit 128 includes a first sensing magnet 1283 and a first rotation sensing element 1281 disposed opposite each other along a direction parallel to the first axis Y. The first rotation sensing element 1281 is disposed at the bottom of the reflective base 121, and the first sensing magnet 1283 is disposed on the side of the carrier 125 near the bottom of the reflective base 121 along a direction parallel to the first axis Y. In other words, the first rotation sensing element 1281 is disposed on the reflective base 1211 for easy power connection, and the first sensing magnet 1283 is disposed on the carrier base 12511. The first rotation sensing element 1281 and the first sensing magnet 1283 are disposed opposite each other along a direction parallel to the first axis Y. When the carrier 125 rotates around the third axis Z, the first sensing magnet 1283 rotates with the carrier 125 around the third axis Z. The magnetic field generated by the first sensing magnet 1283 at the first rotation sensing element 1281 changes, and the first rotation sensing element 1281 can calculate the angle of rotation of the carrier 125 around the third axis Z based on the measured magnetic field information. (Refer to...) Figure 9 , Figure 10 The rotation position sensing unit 128 also includes a second sensing magnet 1284 and a second rotation sensing element 1282 disposed opposite to each other in a direction perpendicular to the first axis Y. When the carrier 125 rotates around the first axis Y, the second sensing magnet 1284 rotates with the carrier 125 around the first axis Y, and the magnetic field generated by the second sensing magnet 1284 at the second sensing element changes. The second sensing element can calculate the angle of rotation of the carrier 125 around the first axis Y based on the measured magnetic field information.

[0069] In some embodiments, the first sensing magnet 1283 can be directly fixed to the carrier 125 by means of insert injection molding, adhesive bonding, magnet groove installation, etc., while the first rotation sensing element 1281 can be indirectly mounted on the reflective base 121 through a circuit board, or directly connected to the reflective base 121. The first rotation sensing element 1281 can also be electrically connected to the imaging module 30 through a circuit board or a conductive insert injection-molded into the reflective base 121. Compared to setting the first rotation sensing element 1281 on the frame 123, the rotation angle of the carrier 125 relative to the reflective base 121 can be measured more directly, and the first rotation element is easier to electrically connect. The first sensing magnet 1283 can be a unipolar magnet or a multipolar magnet. When the first sensing magnet 1283 is a multipolar magnet, the magnetic field around the magnet can be better controlled, reducing magnetic interference to the outside of the reflective module 10. The first rotation sensing element 1281 can be a magnetoresistive sensor, a Hall element, or a driver chip with a magnetoresistive sensor and / or a Hall element. The second sensing magnet 1284 works similarly to the second rotation sensing element 1282.

[0070] In some embodiments, the first rotation sensing element 1281 and the second rotation sensing element 1282 have the same sensitivity. Firstly, this reduces production costs and improves production efficiency during manufacturing and calibration. If the sensing elements have the same sensitivity, they can be used interchangeably, employing a unified calibration process and standard. This helps improve production efficiency and reduces the additional costs incurred from individually calibrating elements with different sensitivities. Simultaneously, it reduces design complexity and improves response speed. Since the two sensing elements respond consistently to changes in the magnetic field, there is no need to develop different circuits and algorithms for elements with different sensitivities. The magnetic field information provided by the two sensing elements can be processed using a unified process, simplifying data processing algorithms, reducing computational complexity, and improving data processing speed. Secondly, it offers better stability. Under different environmental conditions (such as changes in temperature, humidity, and air pressure), the responses of the two sensing elements with the same sensitivity to changes in the magnetic field will remain consistent. This consistency helps maintain the performance stability of the reflection module 10 and reduces the impact of environmental changes on the measurement results.

[0071] In some embodiments, the first sensing magnet 1283 is reused as part of the reflective magnetic attraction portion 127 to simplify the structure of the reflective module 10 and reduce the material cost of the reflective module 10. In other words, the first sensing magnet 1283 can serve as a first reflective magnetic attraction element, and a corresponding magnetic yoke 1274 is provided at the bottom of the reflective base 121 as a second reflective magnetic attraction element. The magnetic yoke 1274 can be fixed to the reflective substrate 1211 of the reflective base 121 by means of insert injection molding or bonding. The magnetic yoke 1274 is disposed opposite to the first sensing magnet 1283 in a direction parallel to the first axis Y, so as to apply a magnetic attraction force to the carrier 125 in a direction parallel to the first axis Y toward the reflective base 121, so that the carrier 125 can be attracted to the reflective base 121. Specifically, the magnetic yoke 1274 is configured as a sheet-like magnetic conductive sheet extending along a plane perpendicular to the first axis Y to increase the area directly opposite the first sensing magnet 1283.

[0072] In some embodiments, projected along a direction parallel to the first axis Y, both the first sensing magnet 1283 and the magnetic yoke 1274 are symmetrically arranged about the third axis Z. This symmetrical arrangement ensures that the torques of the first sensing magnet 1283 and the magnetic yoke 1274 are the same on both sides of the third axis Z, which helps the carrier 125 maintain dynamic balance relative to the reflective base 121 when rotating around the third axis Z. In other words, when the carrier 125 rotates around the third axis Z, regardless of whether it rotates clockwise or counterclockwise, the rotational resistance from the reflective magnetic attraction part 127 is essentially symmetrical. This helps prevent uneven distribution of the magnetic attraction force between the first sensing magnet 1283 and the magnetic yoke 1274 on both sides of the third axis Z, which would affect the rotational effect of the carrier 125 around the third axis Z.

[0073] In some embodiments, projected along a direction parallel to the first axis Y, both the first sensing magnet 1283 and the magnetic yoke 1274 are symmetrically arranged about the second axis X. This symmetrical arrangement ensures that the torques of the first sensing magnet 1283 and the magnetic yoke 1274 are equal on both sides of the second axis X. This facilitates the dynamic balance of the carrier 125 relative to the reflective base 121 when rotating around the first axis Y, or in other words, it facilitates the dynamic balance of the frame 123 supporting the carrier 125 when rotating around the first axis Y. When the frame 123 supporting the carrier 125 rotates around the first axis Y, regardless of whether the carrier 125 rotates clockwise or counterclockwise, the rotational resistance from the reflective magnetic attraction part 127 is essentially symmetrical. This helps prevent uneven distribution of the magnetic attraction force between the first sensing magnet 1283 and the magnetic yoke 1274 on both sides of the first axis Y, which would affect the rotational effect of the carrier 125 around the first axis Y.

[0074] In some embodiments, the center of the first rotation sensing element 1281 is disposed opposite to the center of the first sensing magnet 1283 along a direction parallel to the first axis Y. In other words, projected along a direction parallel to the first axis Y, the first rotation sensing element 1281 is symmetrically disposed about the second axis X and the third axis Z, respectively.

[0075] In some embodiments, the carrier 125 is supported on the reflective base 121 by the frame 123, and the frame 123 is provided with a recess or clearance hole 12311. The recess or clearance hole 12311 is disposed between the first sensing magnet 1283 and the first rotation sensing element 1281 and / or the magnetic yoke 1274, so that the magnetic yoke 1274 and / or the first rotation sensing element 1281 can be closer to the first sensing magnet 1283 in a direction parallel to the first axis Y, which is beneficial to increase the magnetic attraction between the magnetic yoke 1274 and the first sensing magnet 1283, and to facilitate the first rotation sensing element 1281 to detect the magnetic field of the first sensing magnet 1283. Specifically, a magnetic groove extending downwards in a direction parallel to the first axis Y can be provided on the carrier substrate 12511. The magnetic groove passes downwards through the clearance hole 12311 on the frame body 1231. The first sensing magnet 1283 is installed in the magnetic groove, allowing it to be installed near the first rotation sensing element 1281 and the magnetic yoke 1274. It should be understood that the clearance hole 12311 can also be provided to avoid interference between the first sensing magnet 1283 and the frame 123. Therefore, the first sensing magnet 1283 or the magnetic groove may not pass through the clearance hole 12311 on the frame body 1231.

[0076] In some embodiments, the magnetic yoke 1274 is provided with a yoke opening 12741, and the first rotation sensing element 1281 is disposed within the yoke opening 12741. Specifically, the magnetic yoke 1274 has a yoke opening 12741 in its central region, and the first rotation sensing element 1281 is disposed within this yoke opening 12741. Further, along the direction parallel to the first axis Y, a portion of the projection of the first sensing magnet 1283 overlaps with the projections of both the first rotation sensing element 1281 and the yoke opening 12741. In the direction parallel to the third axis Z, the size of the first sensing magnet 1283 is larger than the size of the yoke opening 12741, meaning that another portion of the projection of the first sensing magnet 1283 can overlap with the projection of the magnetic yoke 1274 surrounding the yoke opening 12741. The first rotation sensing element 1281 and the magnetic yoke 1274 are simultaneously positioned opposite the first sensing magnet 1283 in a direction parallel to the first axis Y. A certain magnetic attraction is maintained between the magnetic yoke 1274 and the first sensing magnet 1283 to stably attract the carrier 125. The first rotation sensing element 1281 is positioned within the yoke opening 12741 of the magnetic yoke 12741, allowing it to be positioned opposite the first sensing magnet 1283 through this opening. On one hand, the first rotation sensing element 1281 is spatially closer to the first sensing magnet 1283; on the other hand, the magnetic yoke 1274 surrounding the first rotation sensing element 1281 can concentrate the magnetic field generated by the first sensing magnet 1283, enabling the first rotation sensing element 1281 to receive more concentrated and stronger magnetic field information, thus improving the accuracy and sensitivity of magnetic field detection. In one specific embodiment, the first rotation sensing element 1281 is a magnetoresistive sensor (TMR). The magnetic yoke 1274 can reduce the magnetic field of the magnetoresistive sensor in unnecessary directions, thereby improving the detection accuracy. It should be understood that the first rotation sensing element 1281 being disposed within the yoke opening 12741 means that when viewed along a direction parallel to the first axis Y, the first rotation sensing element 1281 falls within the yoke opening 12741. That is, in a direction parallel to the first axis Y, the projection of the first rotation sensing element 1281 is in the yoke opening 12741.

[0077] It is understood that the size of the yoke opening 12741 should be larger than the size of the first rotation sensing element 1281 so that the first rotation sensing element 1281 can be disposed within the yoke opening 12741. Specifically, the yoke opening 12741 can be machined into a square hole with a size of at least 0.9mm * 1mm to fit the shape and size of the conventional first rotation sensing element 1281, and the square hole is easy to machine. Further, the size of the yoke opening 12741 in the direction parallel to the second axis X can be at least 0.9mm, and the size in the direction parallel to the third axis Z can be at least 1mm.

[0078] To more intuitively illustrate the effect of the magnetic yoke 1274 on the first rotation sensing element 1281, this application measures and compares the magnetic field at the first rotation sensing element 1281 under two scenarios: without the magnetic yoke 1274 and with the magnetic yoke 1274 having different sized yoke openings 12741. (Refer to...) Figure 7 , Figure 8 As shown in the figure, the solid line indicates the case without the magnetic yoke 1274. The dashed line, dotted line, and dashed line indicate three cases where the yoke opening 12741 has the same size in the direction parallel to the third axis Z, but its size in the direction parallel to the second axis X is 0.9mm, 1.5mm, and 2.2mm, respectively. The virtual normal of the first rotation sensing element 1281 in the direction parallel to the first axis Y is defined as Bz, and the direction perpendicular to Bz is defined as By. When the first rotation sensing element 1281 is working, the magnetic difference in the Bz direction is the main parameter used to determine the rotation angle of the carrier 125 around the third axis Z. The magnetic difference in the By direction will interfere with the detection of the first rotation sensing element 1281. In the figure, the horizontal axis represents the travel distance, or rotation angle, of the carrier 125 around the third axis Z, and the vertical axis represents the value of the magnetic difference. Clearly, the magnetic yoke 1274 significantly reduces the magnetic difference in the By direction, while having a relatively smaller impact on the magnetic difference in the Bz direction. Furthermore, the smaller the size of the yoke opening 12741, the more significant the reduction effect on the magnetic difference in the By direction. The magnetic yoke 1274 can selectively reduce the magnetic difference in the By direction, thereby reducing the interference of the By direction magnetic difference on the first rotation sensing element 1281 and improving the detection accuracy.

[0079] In some embodiments, the distance between the first rotation sensing element 1281 and the carrier 125 in a direction parallel to the first axis Y is greater than or equal to the distance between the magnetic yoke 1274 and the carrier 125, or the distance between the first rotation sensing element 1281 and the carrier 125 in a direction parallel to the first axis Y is less than the distance between the magnetic yoke 1274 and the carrier 125. In other words, when the first rotation sensing element 1281 is disposed within the opening 12741 of the magnetic yoke, along the direction parallel to the first axis Y, the first rotation sensing element 1281 protrudes from the side of the magnetic yoke 1274 near the carrier 125, making the first rotation sensing element 1281 closer to the first sensing magnet 1283, thus receiving stronger magnetic field information and facilitating detection; or, the first rotation sensing element 1281 may not protrude from the side of the magnetic yoke 1274 near the carrier 125, that is, it may be concave downwards or remain flush with the magnetic yoke 1274, in order to avoid other components, such as the frame 123, or the first sensing magnet 1283 extending downwards beyond the frame 123, so as to avoid collision damage between the first rotation sensing element 1281 and other components during the rotation of the carrier 125.

[0080] In some embodiments, a flexible protective layer is further included to cover the first rotation sensing element 1281, for protecting the first rotation sensing element 1281, particularly protecting the portion of the first rotation sensing element 1281 that protrudes relative to the magnetic yoke 1274. Specifically, the flexible protective layer may be formed by curing adhesive, or it may be formed by bonding and covering the first rotation sensing element 1281 with other flexible materials.

[0081] In some embodiments, to reduce the resistance to the rotation of the carrier 125 around the third axis Z caused by the magnetic attraction between the magnetic yoke 1274 and the first sensing magnet 1283, it is necessary to reduce the overlap length of the projections of the first sensing magnet 1283 and the magnetic yoke 1274 in the direction parallel to the first axis Y onto the direction parallel to the second axis X. In other words, the smaller the overlap length of the projection of the first sensing magnet 1283 onto the magnetic yoke 1274 in the direction parallel to the second axis X, the less resistance it causes to the rotation of the carrier 125 around the third axis Z, which helps to reduce the power consumption required for the reflective drive unit 126 to drive the carrier 125. Based on this, this application reduces the resistance of the reflective magnetic attraction unit 127 to the rotation of the carrier 125 by increasing the size of the magnetic yoke opening 12741 in the direction parallel to the second axis X.

[0082] In some embodiments, the size of the yoke opening 12741 is larger than the size of the first sensing magnet 1283 in a direction parallel to the second axis X. That is, the magnetic yoke 1274 is disposed in local areas at both ends of the yoke opening 12741 in a direction parallel to the second axis X, and is offset from the first sensing magnet 1283 in a direction parallel to the first axis Y, to reduce the resistance force of the magnetic attraction between the magnetic yoke 1274 and the first sensing magnet 1283 on the rotation of the carrier 125 around the third axis Z. Furthermore, during the rotation of the carrier 125 around the third axis Z, the first sensing magnet 1283 is projected in a direction parallel to the first axis Y, and the size of this projection in the direction parallel to the second axis X is smaller than the size of the yoke opening 12741. That is, during the rotation of the carrier 125 around the third axis Z, the magnetic yoke 1274 is disposed in local areas at both ends of the yoke opening 12741 in a direction parallel to the second axis X, and is still offset from the first sensing magnet 1283 in a direction parallel to the first axis Y. Specifically, when the carrier 125 does not rotate relative to the reflective base 121, the size of the magnetic yoke opening 12741 in the direction parallel to the second axis X is at least 0.2 mm larger than the size of the first sensing magnet 1283 in this direction.

[0083] In some embodiments, the size of the magnetic yoke opening 12741 in the direction parallel to the second axis X is not less than 1.2 mm and not more than 3 mm. More preferably, the size of the magnetic yoke opening 12741 in the direction parallel to the second axis X is not less than 1.5 mm and not more than 2.5 mm.

[0084] As described above, the reflection drive unit 126 is disposed on the second reflective base side 1213 and the third carrier side 12512, while the first rotation sensing element 1281 and the first sensing magnet 1283 are disposed on the reflective substrate 1211 and the carrier substrate 12511. In other words, the reflection drive unit 126 is disposed on the side of the reflection module 10 away from the lens module 20 along the second axis X direction, and the first rotation sensing element 1281 and the first sensing magnet 1283 are disposed on the side of the reflection module 10 away from the reflective element 11 along the first axis Y direction. The combination of the first rotation sensing element 1281 and the first sensing magnet 1283, and the combination of the rotating magnet and the rotating coil, are respectively disposed on both sides of the reflection module 10, which helps to reduce mutual magnetic interference. The second sensing magnet 1284, the second rotation sensing element 1282, and related structures will be further described below.

[0085] In some embodiments, the second sensing magnet 1284 is disposed on one side of the carrier 125 along a direction parallel to the third axis Z, and the second rotation sensing element 1282 is disposed on one side of the reflective base 121 along a direction parallel to the third axis Z, opposite to the second sensing magnet 1284. In other words, the second rotation sensing element 1282 and the second sensing magnet 1284 are disposed opposite each other along a direction parallel to the third axis Z. The second sensing magnet 1284 may be disposed on the first carrier side 1252 or the second carrier side 1253, and correspondingly, the second rotation sensing element 1282 may be disposed on the first reflective base side 1212 or the third reflective base side 1214. The combination of the second sensing magnet 1284 and the second rotation sensing element 1282, the combination of the first rotation sensing element 1281 and the first sensing magnet 1283, and the combination of the rotating magnet and the rotating coil are respectively arranged on different sides of the reflective module 10. This helps to reduce mutual magnetic interference and allows each part to make reasonable use of the space between the carrier 125 and the reflective base 121 for layout, while maintaining a compact structure. In particular, the second rotation sensing element 1282 and the first rotation sensing element 1281 are on different sides from the first rotating coil 1262 or the second rotating coil 1264. In other words, the second rotation sensing element 1282 and the first rotation sensing element 1281 are set independently of the first rotating coil 1262 and the second rotating coil 1264, thereby avoiding the influence of the rotating coil on the second rotation sensing element 1282 and the first rotation sensing element 1281 after being energized. The second rotation sensing element 1282 is set on the reflective base 121 for easy connection to power.

[0086] In some embodiments, the second sensing magnet 1284 is disposed on one side of the carrier 125 along a direction parallel to the third axis Z, and a counterweight element is disposed on the opposite side of the carrier 125. The counterweight element is disposed opposite to the second sensing magnet 1284 along a direction parallel to the third axis Z, so as to maintain a balanced distribution of gravity on the carrier 125 and prevent the center of gravity of the carrier 125 from shifting, thus affecting the rotation effect of the carrier 125. Specifically, the counterweight element may be an unmagnetized sensing magnet or other objects with the same or similar weight as the second sensing magnet 1284.

[0087] In one specific embodiment, the second sensing magnet 1284 is disposed in the magnet groove of the first carrier side portion 1252, and the corresponding counterweight element is disposed in the magnet groove of the second carrier side portion 1253. The magnet grooves on both sides are disposed opposite each other in a direction parallel to the third axis Z. The second sensing magnet 1284 and the counterweight element are housed in the magnet groove to reduce the possibility of collision damage with other components during the rotation of the carrier 125.

[0088] In some embodiments, the second rotation sensing element 1282 and the third axis Z are disposed opposite each other in a direction that is perpendicular to both the first axis Y and the third axis Z. In other words, when the first axis Y is the height direction of the reflective module 10, the second rotation sensing element 1282 and the third axis Z are disposed at the same height to reduce magnetic field crosstalk encountered by the second rotation sensing element 1282.

[0089] Understandably, from a perspective parallel to the third axis Z, the smaller the distance between the second rotation sensing element 1282 and the first axis Y, the better the symmetry of the second sensing element's sensing when the carrier 125 rotates around the first axis Y in two opposite directions. Specifically, from a perspective parallel to the third axis Z, the distance between the second rotation sensing element 1282 and the first axis Y is less than or equal to 3.5 mm.

[0090] As a supplement, in some embodiments, the power consumption of driving the frame 123 and the carrier 125 to rotate around the first axis Y is greater than the power consumption of driving the carrier 125 to rotate around the third axis Z. Therefore, the distance between the first axis Y and the first rotating magnet 1261 is increased to save the driving force required to drive the carrier 125 to rotate around the first axis Y by increasing the torque. However, when the distance between the first axis Y and the third axis Z is large, the utilization rate of the reflective surface of the reflective element 11 on the carrier 125 will be insufficient. After comprehensive consideration, the first axis Y is set on the side of the third axis Z away from the reflective driving part 126 in a direction parallel to the second axis X, but the distance between the first axis Y and the third axis Z is not large. Since the support structure (e.g., the second support part 124) that supports the carrier 125 to rotate around the third axis Z will occupy a certain space in the direction of the second axis X, the distance between the second rotation sensing element 1282 and the first axis Y cannot be set too small. Specifically, based on the viewing angle in the direction parallel to the third axis Z, the distance between the second rotation sensing element 1282 and the first axis Y is greater than or equal to 0.5 mm.

[0091] In some embodiments, projected along the third axis Z direction, the second support 124 is disposed on one side of the first axis Y along the second axis X direction, and the second sensing magnet 1284 is disposed on the carrier 125 and on the opposite side of the first axis Y along the second axis X direction. By staggering the third axis Z and the second sensing magnet 1284 on opposite sides of the first axis Y along a direction parallel to the second axis X, the second sensing magnet 1284 does not need to be disposed between the reflection drive unit 126 and the third axis Z to avoid the second support 124 and the frame 123. The second sensing magnet 1284 and the second rotation sensing element 1282 can be disposed at a position relatively close to the first axis Y. Furthermore, projected along the third axis Z direction, the second sensing magnet 1284 is disposed at a position away from the reflection drive unit 126 in the first axis Y along the second axis X direction, that is, the second sensing magnet 1284 is disposed on the side of the first axis Y along the second axis X direction closer to the lens module 20. Since the second rotation sensing element 1282 is relatively far away from the reflection drive part 126, it is also beneficial to reduce the magnetic field interference of the rotating magnet and the rotating coil on the second rotation sensing element 1282.

[0092] In summary, the second rotation sensing element 1282 is disposed on one side of the reflective base 121 along the direction parallel to the third axis Z, and is disposed relative to the second sensing magnet 1284 along the direction parallel to the third axis Z. Projected along the third axis Z, the distance between the second rotation sensing element 1282 and the first axis Y is greater than or equal to 0.5 mm and less than or equal to 3.5 mm, for example, the distance is 1.5 mm.

[0093] In some embodiments, the first rotating magnet 1261 can be reused as the second sensing magnet 1284, and the second rotation sensing element 1282 is disposed on the reflective base 121 relative to the first rotating magnet 1261. More specifically, the reflective drive unit 126 includes a first rotating magnet 1261 and a first rotating coil 1262 for driving the carrier 125 to rotate about a first axis Y. The first rotating magnet 1261 is disposed on the carrier 125, and the first rotating coil 1262 is disposed on the reflective base 121. The first rotating magnet 1261 constitutes the second sensing magnet 1284, and the second rotation sensing element 1282 is disposed relative to the first rotating magnet 1261. This reduces the number of components, simplifies the structure, and reduces the mass of the carrier 125, thereby reducing the power consumption of driving the carrier 125.

[0094] In some embodiments, since the carrier 125 relies on the frame 123 to achieve a rotational connection with the reflective base 121 about the first axis Y, and the carrier 125 rotates with the frame 123 about the first axis Y, it is obvious that the second sensing magnet 1284 can be disposed on the frame 123, and the second rotation sensing element 1282 can be disposed on the reflective base 121. The angle of rotation of the frame 123 about the first axis Y is the angle of rotation of the carrier 125 about the first axis Y. Specifically, the second sensing magnet 1284 is disposed on one side of the frame 123 along the direction parallel to the third axis Z, and the second rotation sensing element 1282 is disposed on one side of the reflective base 121 along the direction parallel to the third axis Z. The second sensing magnet 1284 and the second rotation sensing element 1282 are disposed opposite each other along the direction parallel to the third axis Z. More specifically, the first frame side 1232 or the second frame side 1233 of the frame 123 is provided with a magnetic groove suitable for mounting the second sensing magnet 1284. Correspondingly, the second rotation sensing element 1282 is disposed on the first reflective base side 1212 or the third reflective base side 1214 of the reflective base 121, so as to be disposed opposite to the second sensing magnet 1284. Compared with the aforementioned method of placing the second sensing magnet 1284 on the carrier 125, placing the second sensing magnet 1284 on the frame 123 can reduce the interference caused by the rotation of the carrier 125 around the third axis Z, and improve the measurement accuracy, since the second sensing magnet 1284 does not need to rotate with the carrier 125 around the third axis Z. As explained above, when the second sensing magnet 1284 is placed on the carrier 125, the minimum distance between the second sensing magnet 1284 and the first axis Y in the direction parallel to the second axis X is affected by the second support part 124. In this embodiment, the second sensing magnet 1284 is placed on the frame 123, which makes the second sensing magnet 1284 closer to the first axis Y in the direction parallel to the second axis X.

[0095] In some embodiments, the second sensing magnet 1284 is disposed on one side of the frame 123 along a direction parallel to the third axis Z, and a counterweight element is disposed on the opposite side of the frame 123. The counterweight element is disposed opposite to the second sensing magnet 1284 along a direction parallel to the third axis Z, so as to maintain a balanced distribution of gravity in the frame 123 and prevent the center of gravity of the frame 123 from shifting and affecting the rotation effect of the frame 123 around the first axis Y. Specifically, the counterweight element may be an unmagnetized sensing magnet or other objects with the same or similar weight as the second sensing magnet 1284.

[0096] In some embodiments, considering that the carrier 125 has a reflection drive unit 126 provided on one side parallel to the second axis X, the reflection drive unit 126 includes a rotating magnet provided on the carrier 125 and a rotating coil provided on the reflection base 121, and the frame 123 has a second sensing magnet 1284 provided on one side parallel to the third axis Z, the second sensing magnet 1284 and the rotating magnet, especially the first rotating magnet 1261 which is spatially closer to the second sensing magnet 1284, may generate mutual magnetic forces, which will exert a deflection force on the carrier 125 relative to the frame 123. Therefore, the frame 123 has the second sensing magnet 1284 provided on one side parallel to the third axis Z, and an auxiliary magnet provided on the opposite side. The auxiliary magnet and the rotating magnet generate interacting magnetic forces to prevent the carrier 125 from deflecting relative to the frame 123 under the magnetic force between the second sensing magnet 1284 and the rotating magnet. As a supplement, the magnetic forces between the auxiliary magnet, the second sensing magnet 1284, and their respective adjacent rotating magnets are either magnetic attraction or magnetic repulsion, thus canceling each other out. Specifically, the auxiliary magnet may generate magnetic attraction / repulsion between itself and the first rotating magnet 1261 relatively close to it, and the second sensing magnet 1284 may generate magnetic attraction / repulsion between itself and another first rotating magnet 1261 relatively close to it. Furthermore, the auxiliary magnet can be reused as a counterweight element to maintain the balance of the frame 123's center of gravity, offering advantages such as simplified structure, reduced material costs, and reduced load weight on the frame 123.

[0097] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A reflection driving component, characterized in that, include: Reflector base; A carrier is rotatably mounted on the reflective base and is adapted to carry a reflective element, the reflective element being adapted to reflect light propagating in a direction parallel to a first axis to propagate in a direction parallel to a second axis, the second axis intersecting the first axis; The rotation position sensing unit includes a first sensing magnet and a first rotation sensing element disposed opposite to each other. The first rotation sensing element is disposed at the bottom of the reflective base, and the first sensing magnet is disposed on the side of the carrier near the bottom of the reflective base along a direction parallel to the first axis. The bottom of the reflective base is provided with a magnetic yoke, the magnetic yoke is provided with a magnetic yoke opening, and the first rotation sensing element is disposed in the magnetic yoke opening, such that the first rotation sensing element and the first sensing magnet are disposed opposite each other in a direction parallel to the first axis. During the rotation of the carrier around the third axis, the first sensing magnet is projected in a direction parallel to the first axis. The size of this projection in the direction parallel to the second axis is smaller than the size of the magnetic yoke opening. When the carrier does not rotate relative to the reflective base, the size of the magnetic yoke opening in the direction parallel to the second axis is at least 0.2 mm larger than the first sensing magnet. The third axis is perpendicular to the first axis and the second axis.

2. The reflection driving component as described in claim 1, characterized in that: Along a direction parallel to the first axis, a portion of the projection of the first sensing magnet overlaps with the projections of the first rotation sensing element and the opening of the yoke, while another portion of the projection of the first sensing magnet overlaps with the projection of the magnetic attraction yoke around the opening of the yoke.

3. The reflection driving component as described in claim 2, characterized in that: In a direction parallel to the third axis, the size of the first sensing magnet is larger than the size of the opening of the magnetic yoke.

4. The reflection driving component as described in any one of claims 1-3, characterized in that: The distance between the first rotation sensing element and the carrier in the direction parallel to the first axis is greater than or equal to the distance between the magnetic yoke and the carrier; or, the distance between the first rotation sensing element and the carrier in the direction parallel to the first axis is less than the distance between the magnetic yoke and the carrier.

5. The reflection driving component as described in any one of claims 1-3, characterized in that: It also includes a flexible protective layer that covers the first rotation sensing element.

6. The reflection driving component as claimed in claim 1, characterized in that: It also includes a frame, a first support portion and a second support portion. The frame is disposed on the reflective base and is adapted to support the carrier. The frame is connected to the reflective base through the first support portion, allowing the frame to rotate relative to the reflective base about a first axis. The carrier is connected to the frame through the second support portion, allowing the carrier to rotate relative to the frame about a third axis, which is perpendicular to the first axis and the second axis.

7. The reflection driving component as described in claim 6, characterized in that: One of the frame and the reflective base is provided with an arc-shaped groove, and the other is provided with three auxiliary grooves. The two ends of the arc-shaped groove extend to two opposite sides of the bottom of the frame or the bottom of the reflective base along a direction parallel to the third axis. The three auxiliary grooves are spaced apart along the arc-shaped groove. The first support part includes three auxiliary balls disposed between each of the auxiliary grooves and the arc-shaped groove. The first axis passes through the center of the virtual circle where the arc-shaped groove is located. The auxiliary balls cooperate with the arc-shaped groove and the auxiliary grooves to guide the frame to rotate relative to the reflective base around the first axis.

8. The reflection driving component as described in claim 7, characterized in that: The three auxiliary grooves include a first limiting groove, a second limiting groove, and a loose fitting accommodating groove. The first limiting groove and the second limiting groove are perpendicular to the limiting direction of their respective auxiliary balls.

9. The reflection driving component as described in claim 7, characterized in that: The frame is provided with two lower rotating shaft grooves, and the carrier is provided with two upper rotating shaft grooves. The two lower rotating shaft grooves are arranged on two opposite sides of the frame along a direction parallel to the third axis, and the two upper rotating shaft grooves are respectively arranged opposite the two lower rotating shaft grooves. The second support part includes two rotating shaft balls disposed between each lower rotating shaft groove and the corresponding upper rotating shaft groove. The third axis passes through the two rotating shaft balls. The rotating shaft balls cooperate with the upper rotating shaft groove and the lower rotating shaft groove to guide the carrier to rotate relative to the frame around the third axis and project along a direction parallel to the first axis. The projection of the third axis passes through the two opposite sides of the projection of the arc-shaped groove. The first sensing magnet is disposed in the area surrounded by the arc-shaped groove.

10. The reflection driving component as claimed in claim 6, characterized in that: The rotation position sensing unit further includes a second rotation sensing element and a second sensing magnet. The second rotation sensing element is disposed on one side of the reflective base along a direction parallel to the third axis. The second sensing magnet is disposed opposite to the second rotation sensing element along a direction parallel to the third axis. The second sensing magnet is disposed on one side of the carrier along a direction parallel to the third axis. A counterweight element is disposed on the other opposite side of the carrier. The counterweight element is disposed opposite to the second sensing magnet along a direction parallel to the third axis.

11. The reflection driving component as claimed in claim 10, characterized in that: Projecting along a direction parallel to the third axis, the second support portion is disposed on one side of the first axis along a direction parallel to the second axis, and the second sensing magnet is disposed on the carrier and disposed on the opposite side of the first axis along a direction parallel to the second axis.

12. The reflection driving assembly as claimed in claim 1 or 6, characterized in that: It also includes a reflection driving unit adapted to drive the carrier to rotate relative to the base about the first axis and the third axis, the third axis being perpendicular to the first axis and the second axis; the reflection driving unit includes a first rotating magnet and a first rotating coil for driving the carrier to rotate about the first axis, and a second rotating magnet and a second rotating coil for driving the carrier to rotate about the third axis, the first rotating magnet and the first rotating coil being disposed opposite to each other along the second axis, and the second rotating magnet and the second rotating coil being disposed opposite to each other along the second axis.

13. A camera module, characterized in that, include: The reflection module includes a reflection element and a reflection driving component as described in any one of claims 1-12; A lens module, wherein the lens module is positioned on the light reflection path of the reflective module; as well as An imaging module receives light emitted from the lens module and performs imaging.

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