Focusing drive components and camera module

Abstract

A focusing drive assembly and a camera module are disclosed. The focusing drive assembly includes a fixed base; a movable carrier mounted within the fixed base, with a gap between the movable carrier and the fixed base; at least one electromagnetic drive portion disposed within the gap; a magnetic attraction assembly disposed within the gap; and a first ball-groove structure and a second ball-groove structure formed within the gap. The first ball-groove structure and the second ball-groove structure are arranged symmetrically with respect to the magnetic attraction assembly. This specific relative positional relationship between the ball-groove structure and the magnetic attraction assembly effectively solves the problem of tilting of the focusing drive assembly when static.

Description

Technical Field

[0001] This application relates to a focus drive assembly and a camera module, which effectively solves the problem of tilting of the focus drive assembly when it is static by means of the special relative positional relationship between the ball-groove structure and the magnetic component. Background Technology

[0002] With the development and widespread adoption of mobile electronic devices, the technologies related to camera modules used in these devices to help users acquire images have experienced rapid growth and advancement. To optimize image quality and shooting effects, some existing camera modules are equipped with focus drive components, such as voice coil motors and ball motors, to perform optical focusing.

[0003] However, in the existing structural design of ball motors, components such as coils, magnets, balls, and yokes are usually arranged together on one side of the ball motor. Although this arrangement does not affect its performance, it results in a larger size on one side of the ball motor, which in turn causes dimensional distortion on one side of the camera module.

[0004] Furthermore, when the ball motor drives the optical lens for focusing, static tilt and dynamic tilt issues can occur. Here, dynamic tilt refers to the optical lens tilting during the movement of the ball motor, while static tilt refers to the optical lens tilting when the ball motor is not in operation.

[0005] Therefore, an optimized focus drive component for camera modules is needed. Summary of the Invention

[0006] One advantage of this application is that it provides a focus drive assembly and a camera module, which effectively solves the problem of tilting of the focus drive assembly when it is static by means of the special relative positional relationship between the ball-groove structure and the magnetic component.

[0007] Other advantages and features of this application will become apparent from the following description and can be realized by means and combinations particularly pointed out in the claims.

[0008] To achieve at least one of the above advantages, according to one aspect of this application, this application provides a focusing drive assembly, which includes:

[0009] Fixed base;

[0010] A movable carrier installed within the fixed base, with a gap between the movable carrier and the fixed base;

[0011] At least one electromagnetic drive unit is disposed within the gap;

[0012] A magnetic attraction assembly disposed in the gap; and

[0013] A first ball-groove structure and a second ball-groove structure are formed within the gap;

[0014] The first ball-groove structure and the second ball-groove structure are arranged symmetrically with respect to the magnetic attraction assembly.

[0015] In the focusing drive assembly according to this application, the gap has a first portion located at the corner of the fixed carrier, and the magnetic suction assembly is disposed in the first portion of the gap.

[0016] In the focusing drive assembly according to this application, the magnetic attraction assembly includes a sensing magnet disposed on the outer side wall of the movable carrier and a reset magnetic yoke disposed on the inner side wall of the fixed base and disposed opposite to the sensing magnet.

[0017] In the focusing drive assembly according to this application, the first ball-groove structure and the second ball-groove structure are arranged symmetrically with respect to the central axis of the reset yoke.

[0018] In the focusing drive assembly according to this application, the first ball-groove structure includes a first channel formed on the outer peripheral wall of the movable carrier, a second channel formed on the inner peripheral wall of the fixed base, the first channel and the second channel cooperating to form a first groove, and at least one first ball disposed in the groove; the second ball-groove structure includes a third channel formed on the outer peripheral wall of the movable carrier, a fourth channel formed on the inner peripheral wall of the fixed base, the third channel and the fourth channel cooperating to form a second groove, and at least one second ball disposed in the groove.

[0019] In the focusing drive assembly according to this application, the line connecting the centers of the first ball and the second ball is perpendicular to the central axis of the reset yoke.

[0020] In the focusing drive assembly according to this application, the magnetic attraction force generated by the magnetic attraction assembly is in the same direction as the clamping force of the first channel and the second channel on the first ball; and / or, the magnetic attraction force generated by the magnetic attraction assembly is in the same direction as the clamping force of the third channel and the fourth channel on the second ball.

[0021] In the focusing drive assembly according to this application, the outer peripheral wall of the movable carrier has a first cross-section located at its corner; the inner peripheral wall of the fixed base has a second cross-section located at its corner and opposite to the first cross-section; wherein the first cross-section and the second cross-section form a first portion of the gap; wherein at least one side of the first channel and the second channel is parallel to the second cross-section, and at least one side of the third channel and the fourth channel is parallel to the second cross-section.

[0022] In the focusing drive assembly according to this application, the gap further has a second portion extending laterally from the first portion and a third portion extending longitudinally from the first portion, with a preset angle between the second portion and the third portion; wherein, the at least one coil-magnet pair includes a first coil-magnet pair and a second coil-magnet pair respectively disposed in the second portion and the third portion of the gap.

[0023] In the focusing drive assembly according to this application, the first ball-groove structure and the first coil-magnet pair are located on the same side of the movable carrier; and / or, the second ball-groove structure and the second coil-magnet pair are located on the same side of the movable carrier.

[0024] In the focusing drive assembly according to this application, the first ball-groove structure and the first coil-magnet pair are located on different sides of the movable carrier; and / or, the second ball-groove structure and the second coil-magnet pair are located on different sides of the movable carrier.

[0025] In the focusing drive assembly according to this application, the gap further has a second portion extending laterally from the first portion and a third portion extending longitudinally from the first portion, with a preset angle between the second portion and the third portion; wherein, the at least one coil-magnet pair includes a first coil-magnet pair and a second coil-magnet pair respectively disposed in the second portion and the third portion of the gap.

[0026] In the focusing drive assembly according to this application, the included angle between the second part and the third part is 90°, and the included angle between the first coil-magnet pair and the second coil-magnet pair is 90°.

[0027] In the focusing drive assembly according to this application, the outer peripheral wall of the movable carrier has a first cross-section located at its corner, a first transverse surface extending laterally from the first cross-section, and a first longitudinal surface extending longitudinally from the first cross-section; the inner peripheral wall of the fixed base has a second cross-section located at its corner and opposite to the first cross-section, a second transverse surface extending laterally from the second cross-section and opposite to the first transverse surface, and a second longitudinal surface extending longitudinally from the second cross-section and opposite to the first longitudinal surface; wherein the first cross-section and the second cross-section form a first portion of the gap; the first transverse surface and the second transverse surface form a second portion of the gap; and the first longitudinal surface and the second longitudinal surface form a third portion of the gap.

[0028] In the focusing drive assembly according to this application, the angle between the first horizontal plane and the first sectional plane is equal to the angle between the first vertical plane and the first sectional plane; and / or, the angle between the second horizontal plane and the second sectional plane is equal to the angle between the second vertical plane and the second sectional plane.

[0029] In the focusing drive assembly according to this application, the shape of the outer peripheral wall of the movable carrier is adapted to the shape of the inner peripheral wall of the fixed base.

[0030] In the focusing drive assembly according to this application, the focusing drive assembly further includes a drive circuit board extending into a first portion, a second portion, and a third portion of the gap, wherein the drive circuit board has a first drive circuit sub-board located in the first portion of the gap, a second drive circuit sub-board located in the second portion of the gap, and a third drive circuit sub-board located in the third portion of the gap.

[0031] In the focusing drive assembly according to this application, the first drive circuit sub-board is attached to the second cross-section, the second drive circuit sub-board is attached to the second transverse surface, and the third drive circuit sub-board is attached to the second longitudinal surface.

[0032] In the focusing drive assembly according to this application, the reset yoke is located between the first coil and the second coil.

[0033] In the focus drive assembly according to this application, the focus drive assembly further includes a position sensing element disposed on the first drive circuit sub-board and facing the sensing magnet, the position sensing element being configured to sense the movement position of the sensing magnet.

[0034] According to another aspect of this application, a camera module is also provided, comprising:

[0035] Photosensitive components;

[0036] An optical lens held in the light-sensing path of the photosensitive element; and

[0037] The focusing drive assembly described above is used to drive the optical lens to move along the photosensitive path for optical focusing.

[0038] In the camera module according to this application, the camera module further includes a stabilization drive component for driving the photosensitive component to move for optical image stabilization.

[0039] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0040] These and other objects, features and advantages of this application are fully apparent from the following detailed description, the accompanying drawings and the claims. Attached Figure Description

[0041] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0042] Figure 1 The illustration shows a three-dimensional exploded view of a camera module according to an embodiment of this application.

[0043] Figure 2 The illustration shows a schematic diagram of the photosensitive component of the camera module according to an embodiment of this application.

[0044] Figure 3 An exploded perspective view of the focus drive component of the camera module according to an embodiment of this application is shown.

[0045] Figure 4 The figure shows a cross-sectional schematic diagram of the focus drive assembly according to an embodiment of the present application.

[0046] Figure 5 The illustration shows another cross-sectional schematic diagram of the focus drive assembly according to an embodiment of this application.

[0047] Figure 6 The illustration shows another cross-sectional schematic diagram of the focus drive assembly according to an embodiment of this application.

[0048] Figure 7 The figure shows a perspective view of the focus drive assembly according to an embodiment of the present application.

[0049] Figure 8The figure shows a cross-sectional schematic diagram of a modified embodiment of the focus drive assembly according to an embodiment of this application. Detailed Implementation

[0050] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0051] Indicative camera module

[0052] like Figures 1 to 7 As shown, a camera module according to an embodiment of this application is illustrated, which includes a photosensitive component 10, an optical lens 20 held on the photosensitive path of the photosensitive component 10, a focusing drive component 30 for driving the optical lens 20 to move along the photosensitive path for optical focusing, and a housing 40 for encapsulation.

[0053] Accordingly, such as Figure 2 As shown in this embodiment, the photosensitive component 10 includes: a circuit board 11, a photosensitive chip 12, a lens mount 13, and a filter element 14. Specifically, the photosensitive chip 12 is electrically connected to the circuit board 11, so that the circuit board 11 provides the control circuit and power required for the operation of the photosensitive chip 12. For example, in one example, the photosensitive chip 12 is mounted on the upper surface of the circuit board 11 and electrically connected to the circuit board 11 by gold wire bonding. Of course, in other embodiments of this application, the photosensitive chip 12 can also be disposed on the circuit board 11 in other ways and / or electrically connected to the circuit board 11 in other ways, for example, attached to the lower surface of the circuit board 11 in a flip-chip manner, which is not limited to this application. It should be understood that in this embodiment, the photosensitive path of the photosensitive chip 12 forms the photosensitive path of the photosensitive component 10.

[0054] The lens mount 13 is formed on the circuit board 11 to support other components, wherein the mount has a light window corresponding to at least the photosensitive area of ​​the photosensitive chip 12. In a specific example of this application, the lens mount 13 is implemented as a separately molded plastic bracket, which is attached to the surface of the circuit board 11 by an adhesive and is used to support other components. Of course, in other examples of this application, the lens mount 13 can also be formed on the circuit board 11 in other ways, for example, the lens mount is implemented as a molded base, which is integrally formed on a predetermined position of the circuit board 11 by a molding process, and this is not limited to this application.

[0055] In this embodiment, the filter element 14 filters the imaging light entering the photosensitive chip 12 to remove stray light. Therefore, the filter element 14 is held on the photosensitive path of the photosensitive chip 12. For example, in a specific example, the filter element 14 is mounted on the lens mount 13 and corresponds to at least the photosensitive area of ​​the photosensitive chip 12. In this way, the filter element 14 is held on the photosensitive path of the photosensitive chip 12. It is worth mentioning that in other examples of this application, the filter element 14 can also be mounted on the lens mount 13 in other ways. For example, a filter element support can be first provided on the lens mount 13, and then the filter element 14 can be mounted on the filter element support. That is, in this example, the filter element 14 can be indirectly mounted on the lens mount 13 through other support members. Furthermore, in other examples of this application, the filter element 14 can also be installed in other locations of the camera module, for example, the filter element 14 is formed inside the optical lens 20 (for example, as a filter film attached to the surface of an optical lens of the optical lens 20), which is not limited to this application.

[0056] To increase the bottom strength of the photosensitive component 10, in some examples of this application, the photosensitive component 10 further includes a reinforcing plate (not shown) disposed on the lower surface of the circuit board 11. For example, a steel plate may be disposed on the lower surface of the circuit board 11 to strengthen the circuit board 11. Accordingly, the reinforcing plate may be configured to have a shape and size consistent with the circuit board 11 to strengthen the circuit board 11 as a whole after being stacked on the lower surface of the circuit board 11.

[0057] Furthermore, in this embodiment, the optical lens 20 is held in the light-sensing path of the photosensitive component 10 to collect external imaging light. Accordingly, the optical lens 20 can be implemented as a separate component, or it can be integrated with the focusing drive component 30 (this will be discussed in detail in the subsequent description of the focusing drive component 30, and will not be repeated here). When the optical lens 20 is implemented as a separate component, it can be implemented as a separate lens or a one-piece lens.

[0058] An integrated lens includes a lens barrel and at least one optical lens mounted within the lens barrel. A split lens, on the other hand, includes at least two lens portions, for example, a first lens portion and a second lens portion. The first lens portion includes a first lens barrel and at least one optical lens mounted within the first lens barrel, and the second lens portion includes a second lens barrel and at least one optical lens mounted within the second lens barrel. The at least one optical lens of the first lens portion and the at least one optical lens of the second lens portion cooperate to form an image-capable optical system.

[0059] Those skilled in the art will understand that, within a predetermined range of optical lenses, the resolving power of the optical lens 20 is directly proportional to the number of optical lenses; that is, the better the resolving power of the optical lens 20, the greater the number of optical lenses it contains. Therefore, in actual camera modules, the optical lens 20 typically contains five or more optical lenses.

[0060] Accordingly, during the imaging process of the camera module, the relative positional relationship between the optical lens 20 and the photosensitive component 10 needs to be adjusted so that the imaging focal plane of the optical lens 20 is located on the imaging surface of the photosensitive chip 12. Therefore, in this embodiment, the camera module is further configured with a focusing drive component 30 for driving the optical lens 20 to move along the light-sensing path of the photosensitive component 10 for optical focusing.

[0061] Specifically, in this embodiment, the focusing drive assembly 30 is implemented as a ball motor, comprising: a fixed base 31, a movable carrier 32 mounted within the fixed base 31, at least one electromagnetic drive unit for driving the movable carrier 32 to move relative to the fixed base 31, a magnetic attraction assembly 34 for resetting, and at least one ball-groove structure for guiding the movable assembly to move relative to the fixed base 31, such as... Figure 3 and Figure 4 As shown.

[0062] Accordingly, in this embodiment, the movable carrier 32 can be disposed above the fixed base 31 or housed within the fixed base 31. Accordingly, as... Figure 3 and Figure 4 As shown, in a specific example of this application, the movable carrier 32 is installed in the fixed base 31, that is, the fixed base 31 has a receiving cavity, and the movable carrier 32 is movably installed in the receiving cavity.

[0063] In this embodiment, the optical lens 20 is mounted in the movable carrier 32, so that when the movable carrier 32 moves relative to the fixed base 31, it can carry the optical lens 20 along the photosensitive path for optical focusing. In specific implementations, when the optical lens 20 is implemented as a separate component, it can be mounted in the lens mounting cavity of the movable carrier 32 by means of adhesive bonding, snap-fit ​​connection, or threaded connection. It is worth mentioning that in other examples of this application, the optical lens 20 can also be integrated with the focusing drive assembly 30, that is, at least one optical lens of the optical lens 20 is directly mounted in the lens mounting cavity without a lens barrel. In other words, the lens mounting cavity of the movable carrier 32 functionally forms the lens barrel of the optical lens 20, thus reducing the overall size of the camera module.

[0064] It should be understood that in this embodiment, the fixed base 31 is a fixed-position component, that is, the fixed base 31 forms the stator of the focusing drive assembly 30, while the movable carrier 32 can move relative to the fixed base 31 along the light-sensing path of the photosensitive assembly 10, that is, the movable carrier 32 forms the mover of the focusing drive assembly 30. The driving force for moving the movable carrier 32 relative to the fixed base 31 is provided by the at least one electromagnetic drive unit. In this embodiment, the electromagnetic drive unit is a coil-magnet pair, that is, the driving force is generated by the electromagnetic interaction between the coil and the magnet.

[0065] Specifically, in such Figure 4 In the illustrated example, the focusing drive assembly 30 includes two electromagnetic drive units: a first electromagnetic drive unit 33 and a second electromagnetic drive unit 35. The first electromagnetic drive unit 33 includes a first magnet 331 disposed on the outer side wall of the movable carrier 32 and a first coil 332 disposed on the inner side wall of the fixed base 31 and disposed opposite to the first magnet 331. When the first coil 332 is energized, it interacts with the first magnet 331 to generate a driving force along the photosensitive path direction to drive the movable carrier 32 to move relative to the fixed base 31. The second electromagnetic drive unit 35 includes a second magnet 351 disposed on the outer side wall of the movable carrier 32 and a second coil 352 disposed on the inner side wall of the fixed base 31 and disposed opposite to the second magnet 351. When the second coil 352 is energized, it interacts with the second magnet 351 to generate a driving force along the photosensitive path direction to drive the movable carrier 32 to move relative to the fixed base 31.

[0066] It should be understood that in other examples of this application, the focusing drive assembly 30 may include only one electromagnetic drive unit, or may include a greater number of electromagnetic drive units, which is not limited to this application.

[0067] Specifically, in this embodiment, the magnetic attraction component 34 includes a sensing magnet 341 disposed on the outer side wall of the movable carrier 32 and a reset yoke 342 disposed on the inner side wall of the fixed base 31 and disposed opposite to the sensing magnet 341. The magnetic attraction between the sensing magnet 341 and the reset yoke 342 allows the movable carrier 32 to return to its initial position after being moved (here, the initial position refers to the initial position of the movable carrier 32). In actual operation, after energizing the first coil 332 and the second coil 352 is stopped, the magnetic attraction between the sensing magnet 341 and the reset yoke 342 causes the movable carrier 32 to return to its initial position.

[0068] As mentioned earlier, when the ball motor drives the optical lens 20 for focusing, static tilt and dynamic tilt can occur. Here, dynamic tilt refers to the tilt of the optical lens 20 during the movement of the ball motor, while static tilt refers to the tilt of the optical lens 20 when the ball motor is not working.

[0069] To solve the above-mentioned technical problems, in this application embodiment, on the one hand, the relative positional relationship between the electromagnetic drive unit and the magnetic attraction component 34 is specially configured to solve the problem of dynamic tilting; on the other hand, the relative positional relationship between the magnetic attraction component 34 and the ball-groove structure is specially configured to solve the problems of dynamic tilting and static tilting.

[0070] To achieve the above-mentioned special positional configuration, the shape and size parameters of the movable carrier 32 and the fixed base 31 are first specially configured so that the electromagnetic drive unit, the magnetic suction component 34, and the ball-groove structure can be arranged in the gap formed by the movable carrier 32 and the fixed base 31 according to preset requirements.

[0071] Specifically, such as Figure 4 As shown, in this embodiment of the application, a gap 300 exists between the movable carrier 32 and the fixed base 31, wherein the gap 300 has a first portion 310 located at the corner of the fixed base 31. Here, in this embodiment of the application, the fixed base 31 has a block structure, as shown in... Figure 4In the illustrated example, the fixed base 31 is cuboid in shape, or in other words, the cross-sectional shape of the fixed base 31 is rectangular. That is, in this embodiment, the fixed base 31 has four corner portions. It is worth mentioning that when the fixed base 31 is implemented in other shapes, the number of its corner portions may increase or decrease, which is not limited to this application.

[0072] That is, in this embodiment, the first portion 310 of the gap 300 is located in the corner region of the fixed base 31, i.e., at least a portion of the gap 300 is located in the corner region of the fixed base 31, thus utilizing the space in the corner region of the fixed base 31. Specifically, in this embodiment, the magnetic suction component 34 is disposed in the first portion 310 of the gap 300, i.e., the magnetic suction component 34 is disposed within the gap 300 located at the corner of the fixed base 31 between the movable carrier 32 and the fixed base 31.

[0073] Furthermore, in this embodiment, the gap 300 also has a second portion 320 extending laterally from the first portion 310 and a third portion 330 extending longitudinally from the first portion 310, with a preset angle between the second portion 320 and the third portion 330. That is, in this embodiment, the gap 300 has a special shape configuration, comprising at least three portions (without limiting the other portions of the gap 300): the first portion 310 is located at the corner of the fixed base 31, the second portion 320 extends laterally from the first portion 310, the third portion 330 extends longitudinally from the first portion 310, and a preset angle exists between the second portion 320 and the third portion 330. The purpose of emphasizing the preset angle between the second portion 320 and the third portion 330 is to illustrate that the second portion 320 and the third portion 330 are not parallel; that is, the angle between the second portion 320 and the third portion 330 is not limited by this application. Furthermore, in this embodiment of the application, the included angle between the second part 320 and the third part 330 represents the included angle between the central axis of the second part 320 and the central axis of the third part 330.

[0074] like Figure 4 As shown, in this embodiment of the application, the first electromagnetic drive unit 33 and the second electromagnetic drive unit 35 are respectively disposed in the second portion 320 and the third portion 330 of the gap 300. Furthermore, as... Figure 4As shown in this embodiment, the magnetic suction component 34 is disposed in the first portion 310 of the gap 300. That is, in this embodiment, the magnetic suction component 34 is disposed within the gap 300 located at the corner of the fixed base 31 between the movable carrier 32 and the fixed base 31, and the magnetic suction component 34 is located between two pairs of coil-magnet pairs, with a preset included angle between these two pairs of coil-magnet pairs (i.e., these two pairs of coil-magnet pairs are not parallel). This results in a more compact component layout within the focusing drive component 30, reducing its overall size. Furthermore, the special relative positional relationship between the first electromagnetic drive unit 33, the second electromagnetic drive unit 35, and the magnetic suction component 34 solves the dynamic tilt problem of the focusing camera module.

[0075] More specifically, such as Figure 4 As shown in this embodiment, the outer peripheral wall of the movable carrier 32 has a first cross-section 321 located at its corner, a first transverse surface 322 extending laterally from the first cross-section 321, and a first longitudinal surface 323 extending longitudinally from the first cross-section 321; the inner peripheral wall of the fixed base 31 has a second cross-section 311 located at its corner and opposite to the first cross-section 321, a second transverse surface 312 extending laterally from the second cross-section 311 and opposite to the first transverse surface 322, and a second longitudinal surface 313 extending longitudinally from the second cross-section 311 and opposite to the first longitudinal surface 323; wherein, the first cross-section 321 and the second cross-section 311 form a first portion 310 of the gap 300; the first transverse surface 322 and the second transverse surface 312 form a second portion 320 of the gap 300; and the first longitudinal surface 323 and the second longitudinal surface 313 form a third portion 330 of the gap 300.

[0076] For ease of understanding, the area formed by the first cross-section 321, the first transverse surface 322, and the first longitudinal surface 323 on the outer peripheral wall of the movable carrier 32 is defined as the first irregular-shaped area, and the area formed by the second cross-section 311, the second transverse surface 312, and the second longitudinal surface 313 on the inner peripheral wall of the fixed base 31 is defined as the second irregular-shaped area. Preferably, in this embodiment, the first irregular-shaped area and the second irregular-shaped area have the same shape, that is, the first cross-section 321 is parallel to the second cross-section 311, the first transverse surface 322 is parallel to the second transverse surface 312, and the first longitudinal surface 323 is parallel to the second longitudinal surface 313. Of course, in other embodiments of this application, the shapes of the first irregular-shaped area and the second irregular-shaped area may not be the same, for example, there may be a slight difference between them, which is not limited to this application.

[0077] More specifically, in this embodiment, the angle between the first horizontal surface 322 and the first vertical surface 323 is 90°, and the angle between the second horizontal surface 312 and the second vertical surface 313 is 90°. Thus, the angle between the second part 320 and the third component is 90°. Furthermore, in this embodiment, the angles between the first horizontal surface 322 and the first sectional surface 321 are obtuse, the angles between the first vertical surface 323 and the first sectional surface 321 are obtuse, the angles between the second horizontal surface 312 and the second sectional surface 311 are obtuse, and the angles between the second vertical surface 313 and the second sectional surface 311 are obtuse. Preferably, the angle between the first horizontal surface 322 and the first sectional surface 321 is equal to the angle between the first vertical surface 323 and the first sectional surface 321; and / or, the angle between the second horizontal surface 312 and the second sectional surface 311 is equal to the angle between the second vertical surface 313 and the second sectional surface 311. Of course, the angle between the first horizontal surface 322 and the first sectional surface 321 and the angle between the first vertical surface 323 and the first sectional surface 321 may not be equal, and the angle between the second horizontal surface 312 and the second sectional surface 311 and the angle between the second vertical surface 313 and the second sectional surface 311 may not be equal. More preferably, in the embodiments of this application, the included angle between the first horizontal surface 322 and the first sectional surface 321 is 135°, the included angle between the first vertical surface 323 and the first sectional surface 321 is 135°, the included angle between the second horizontal surface 312 and the second sectional surface 311 is 135°, and the included angle between the second vertical surface 313 and the second sectional surface 311 is 135°.

[0078] Accordingly, in this embodiment, the first magnet 331 of the first electromagnetic drive unit 33 is disposed on the first horizontal surface 322 of the movable carrier 32, and the first coil 332 of the first electromagnetic drive unit 33 is disposed on the second horizontal surface 312 of the fixed base 31; the second magnet 351 of the second electromagnetic drive unit 35 is disposed on the first vertical surface 323 of the movable carrier 32, and the second coil 352 of the second electromagnetic drive unit 35 is disposed on the second vertical surface 313 of the fixed base; the sensing magnet 341 of the magnetic attraction component 34 is disposed on the first cross-section 321 of the movable carrier 32, and the reset yoke 342 of the magnetic attraction component 34 is disposed on the second cross-section 311 of the fixed base 31. Preferably, the sensing magnet 341 of the magnetic attraction component 34 is disposed in the middle region of the first cross-section 321 of the movable carrier 32, and the reset yoke 342 of the magnetic attraction component 34 is disposed in the middle region of the second cross-section 311 of the fixed base 31.

[0079] Specifically, when the angle between the second part 320 and the third part 330 is 90°, that is, when the angle between the coil-magnet pair of the first electromagnetic drive unit 33 and the coil-magnet pair of the second electromagnetic drive unit 35 is 90°, the driving force generated by the first electromagnetic drive unit 33 and the second electromagnetic drive unit 35 can make the movable carrier 32 move more evenly along the photosensitive path to reduce the generation of tilt during the driving process.

[0080] Furthermore, since there are included angles between the first portion 310 and the second portion 320, as well as between the first portion 310 and the third portion 330, the first electromagnetic drive unit 33, the second electromagnetic drive unit 35, and the magnetic attraction assembly 34 also have a certain angle in the horizontal cross-section. In other words, the direction of the magnetic attraction force generated by the magnetic attraction assembly 34 is not orthogonal to the direction of the driving force generated by the first electromagnetic drive unit 33 or the second electromagnetic drive unit 35 on the plane of the driving force. Here, the plane of the driving force refers to the plane where the first coil 332 or the first magnet 331 of the first electromagnetic drive unit 33 is located along the photosensitive path, or the plane where the second coil 352 or the second magnet 351 of the second electromagnetic drive unit 35 is located.

[0081] Those skilled in the art will understand that during the process of moving the optical lens 20 for optical focusing, the focusing drive assembly 30 generates not only dynamic tilt but also static tilt; that is, the focusing camera module may tilt even when it is not in operation. Therefore, in this embodiment, the relative positional relationship between the magnetic suction assembly 34 and the ball-groove structure is specially configured to solve the static tilt problem and further optimize the dynamic tilt problem.

[0082] Specifically, such as Figures 4 to 6 As shown in the embodiment of this application, the at least one ball-groove structure includes a pair of ball-groove structures (for ease of explanation, defined as the first ball-groove structure 38 and the second ball-groove structure 39), wherein the first ball-groove structure 38 and the second ball-groove structure 39 are arranged symmetrically with respect to the magnetic attraction component 34.

[0083] More specifically, the first ball-groove structure 38 includes a first channel 381 formed on the outer peripheral wall of the movable carrier 32, a second channel 382 formed on the inner peripheral wall of the fixed base 31, the first channel 381 and the second channel 382 cooperating to form a first groove 380, and at least one first ball 383 disposed within the first groove 380; the second ball-groove structure 39 includes a third channel 391 formed on the outer peripheral wall of the movable carrier 32, a fourth channel 392 formed on the inner peripheral wall of the fixed base 31, the third channel 391 and the fourth channel 392 cooperating to form a second groove 390, and at least one second ball 393 disposed within the second groove 390. In specific implementations, the shapes of the first channel 381, the second channel 382, ​​the third channel 391 and the fourth channel 392 can be V-shaped, I-shaped, etc.

[0084] In this embodiment, the magnetic attraction component 34 is disposed at the first portion 310 of the gap 300, that is, the magnetic resistance component is located at the corner of the fixed base 31. More specifically, in this embodiment, the first ball-groove structure 38 and the second ball-groove structure 39 are arranged symmetrically with respect to the central axis of the reset yoke 342, thereby ensuring that the first ball-groove structure 38 and the second ball-groove structure 39 are arranged symmetrically with respect to the magnetic attraction component 34.

[0085] It should be understood that when the first ball-groove structure 38 and the second ball-groove structure 39 are arranged symmetrically with respect to the central axis of the reset yoke 342, the magnetic attraction force generated by the magnetic attraction component 34 is in the same direction as the clamping force of the first channel 381 and the second channel 382 on the first ball 383, so that the first ball 383 can be adapted to be clamped between the movable carrier 32 and the fixed base 31. Furthermore, the magnetic attraction force generated by the magnetic attraction component 34 is in the same direction as the clamping force of the third channel 391 and the fourth channel 392 on the second ball 393, so that the second ball 393 can be adapted to be clamped between the movable carrier 32 and the fixed base 31, thereby solving the static tilt problem and further optimizing the dynamic tilt problem.

[0086] More preferably, in the embodiments of this application, on the horizontal cross-section of the focusing photosensitive component 10 (e.g. Figure 5 and Figure 6As shown), the line connecting the centers of the balls in the first ball-groove structure 38 and the second ball-groove structure 39 is perpendicular to the central axis of the sensing magnet 341 of the magnetic attraction assembly 34 (i.e., the line connecting the centers of the first ball 383 and the second ball 393 is perpendicular to the central axis of the reset yoke 342), so that the magnetic attraction force generated by the magnetic attraction assembly 34 is in the same direction as the clamping force of the first channel 381 and the second channel 382 on the balls and the clamping force of the third channel 391 and the fourth channel 392 on the balls.

[0087] To further ensure the directional synergy of the magnetic attraction and the clamping force, more preferably, in this embodiment, at least one side of the first channel 381 and the second channel 382 is parallel to the second cut surface 311, and at least one side of the third channel 391 and the fourth channel 392 is parallel to the second cut surface 311, such as... Figure 5 and Figure 6 As shown. It should be understood that when at least one side of the first channel 381 and the second track 382 is parallel to the second sectional surface 311 of the fixed base 31, the direction of the clamping force is the same as the direction of the magnetic attraction force: forming a 90° angle with the second sectional surface 311, so as to ensure that the first ball 383 can be appropriately clamped in the first channel 381 and the second track 382, ​​thereby allowing the movable carrier 32 to be stably placed in the fixed base 31 without tilting, resulting in static tilt. When at least one side of the third track 391 and the fourth track 392 is parallel to the second sectional surface 311 of the fixed base 31, the direction of the clamping force is the same as the direction of the magnetic attraction force: forming a 90° angle with the second sectional surface 311, so as to ensure that the second ball 393 can be properly clamped in the third track 391 and the fourth track 392, thereby allowing the movable carrier 32 to be stably placed in the fixed base 31 without tilting, resulting in static tilt.

[0088] It is worth mentioning that the parallel and perpendicular relationships involved in this application can be subject to certain deviations, such as a deviation of 5°-10°.

[0089] Further, in this embodiment, the first ball-groove structure 38 and the first coil-magnet pair are located on the same side of the movable carrier 32; and / or, the second ball-groove structure 39 and the second coil-magnet pair are located on the same side of the movable carrier 32, such as... Figures 4 to 6As shown. Of course, in other examples of this application, the first ball-groove structure 38 and the first coil-magnet pair are located on different sides of the movable carrier 32; and / or, the second ball-groove structure 39 and the second coil-magnet pair are located on different sides of the movable carrier 32, such as... Figure 8 As shown.

[0090] Furthermore, to prevent the movable carrier from tilting due to the balls rolling onto one side of the groove in the ball-groove structure, the structure of the ball-groove structure is further optimized in this embodiment. Specifically, as shown... Figure 7 As shown, the ball-groove structure further includes a baffle formed within the groove and dividing the groove into a first sub-groove and a second sub-groove. The at least one ball includes a ball disposed in the first sub-groove and a ball disposed in the second sub-groove. That is, the baffle divides the groove into two sub-grooves, and each groove accommodates at least one ball. Thus, the baffle allows different balls to move within different rolling sub-grooves, preventing the movable carrier from tilting due to a ball rolling to one side of the groove. Preferably, the baffle is disposed in the middle region of the groove, i.e., the baffle is located in the central region of the groove.

[0091] Accordingly, in this embodiment, the first ball-groove structure 38 includes a first baffle 384 formed within the first groove 380 and dividing the first groove 380 into two sub-groove portions, wherein each sub-groove portion is provided with at least one first ball 383. The second ball-groove structure 39 includes a second baffle 394 formed within the second groove 390 and dividing the second groove 390 into two sub-groove portions, wherein each sub-groove portion is provided with at least one second ball 393.

[0092] In order to connect the first driving portion 33, the second driving portion 35 and the magnetic attraction assembly 34, the focusing driving assembly 30 further includes a driving circuit board 36 extending into the first portion 310, the second portion 320 and the third portion 330 of the gap 300, wherein the driving circuit board 36 has a first driving circuit sub-board 361 located in the first portion 310 of the gap 300, a second driving circuit sub-board 362 located in the second portion 320 of the gap 300 and a third driving circuit sub-board 363 located in the third portion 330 of the gap 300.

[0093] Specifically, in the embodiments of this application, such as Figure 4As shown, the first drive circuit sub-board 361 is attached to the second cross-section 311, the second drive circuit sub-board 362 is attached to the second horizontal surface 312, and the third drive circuit sub-board 363 is attached to the second vertical surface 313. The reset yoke 342 is disposed on the first drive circuit sub-board 361, the first coil 332 is electrically connected to the second drive circuit sub-board 362, and the second coil 352 is electrically connected to the third drive circuit sub-board 363. Preferably, the reset yoke 342 is located in the middle region of the first drive circuit sub-board 361.

[0094] Specifically, in this embodiment, the reset yoke 342 is disposed on the side of the first drive circuit sub-board 361 facing away from the sensing magnet 341, and the first coil 332 and the second coil 352 are disposed on the side of the second drive circuit sub-board 362 and the third drive circuit sub-board 363 facing the first magnet 331 and the second magnet 351, that is, the reset yoke 342 and the first coil 332 and the second coil 352 are disposed on different sides of the drive circuit board 36.

[0095] Furthermore, such as Figure 4 As shown, the focusing drive assembly 30 further includes a position sensing element 37 disposed on the first drive circuit sub-board 361 and facing the sensing magnet 341. The position sensing element 37 is configured to sense the movement position of the sensing magnet 341. Of course, in this embodiment, after the position sensing element 37 senses the movement of the sensing magnet 341, the movement signal can be further transmitted to a signal processing unit, which then judges and processes the movement information of the movable carrier 32 to form closed-loop control. In specific implementations, the position sensing element 37 can be a Hall element, an integration of a drive IC and a Hall element, or other position sensing elements 37.

[0096] It is worth mentioning that, in some examples of this application, the fixed base 31 also has a stop extending upward from its inner bottom surface, the stop being opposite to the ball to prevent the ball from derailing during movement. Alternatively, the stop can be provided in the upper region of the groove to prevent the ball from dislodging from the upper region of the groove.

[0097] It is also worth mentioning that, in some examples of this application, the fixed base 31 also has an anti-collision protrusion extending upward from its inner bottom surface, the anti-collision protrusion facing the movable carrier 32 to prevent the movable carrier 32 from colliding with the fixed base 31 during movement and causing damage.

[0098] Furthermore, during the use of the camera module, the image quality may be affected by factors such as hand tremors. Therefore, the camera module according to this application also includes an image stabilization drive component for driving the photosensitive component 10 to move for optical image stabilization.

[0099] The image stabilization drive assembly 50 is implemented as a shake compensation actuator, wherein the shake compensation actuator includes at least one image stabilization coil 51 and at least one image stabilization magnet 52. The image stabilization coil 51 is disposed on the fixed carrier 53, and the image stabilization magnet 52 is disposed on the lens mount 13. The image stabilization coil 51 and the image stabilization magnet 52 are disposed opposite to each other. When the image stabilization coil 51 is energized, it can generate electromagnetic induction with the image stabilization magnet 52 to drive the image stabilization magnet 52 to move the lens mount 13, thereby moving the photosensitive assembly 10 in a plane perpendicular to the optical axis.

[0100] Preferably, the bottom of the fixed carrier 53 is provided with a mounting groove for the image stabilization coil 51 to fix the image stabilization coil 51 to the fixed carrier 53 and minimize the increase in height dimension. The bottom of the lens mount 13 is provided with a mounting groove for the image stabilization magnet 52 to fix the image stabilization magnet 52 to the lens mount 13 and minimize the increase in height dimension. Preferably, the number of image stabilization coils 51 and image stabilization magnets 52 is 4, located on the four sides of the fixed carrier 53 and the lens mount 13 respectively. Of course, the number of image stabilization coils 51 and image stabilization magnets 52 can also be 2, located on the two adjacent sides of the fixed carrier 53 and the lens mount 13 respectively.

[0101] Furthermore, the image stabilization drive assembly 50 also includes a magnetic suction component, a guide mechanism 54, a conductive structure, and a frame. Specifically, in order to ensure frictional contact between the lens mount 13 and the fixed carrier 53, and to ensure that the lens mount 13 remains stable within the camera module and does not detach due to shaking or inversion of the camera module, thereby maintaining the photosensitive component 10 in the center, the magnetic suction component is provided between the lens mount 13 and the fixed carrier 53.

[0102] Specifically, the magnetic attraction component includes a second magnetic yoke, which is disposed opposite to the anti-shake magnet 52. The second magnetic yoke is disposed on the fixed carrier 53 so that the photosensitive component 10 can return to its initial position (initial position refers to the initial position of the photosensitive component 10) after movement due to the attractive force between the second magnetic yoke and the anti-shake magnet 52. In one embodiment of this application, the second magnetic yoke is disposed on the back side of the anti-shake coil 51, that is, the anti-shake magnet 52 can move with the lens mount 13. After the anti-shake coil 51 is de-energized, the attractive force between the second magnetic yoke and the anti-shake magnet 52 causes the photosensitive component 10 to return to its initial position. In this embodiment of this application, the driving force generated between the anti-shake magnet 52 and the anti-shake coil 51 is in a plane perpendicular to the optical axis, while the magnetic attraction force generated between the second magnetic yoke and the anti-shake magnet 52 is along the optical axis.

[0103] It is worth mentioning that in conventional camera modules, the magnetic yoke is usually placed on the side wall. However, when a larger stroke is required, the distance between the magnetic yoke and the magnet needs to be set further, and resetting becomes more difficult. In contrast to the conventional solution, this application places the second magnetic yoke directly above the stabilizing magnet 52, generating an upward attraction. Since the stabilizing magnet 52 moves along a plane perpendicular to the optical axis and parallel to the plane containing the second magnetic yoke during optical image stabilization, the distance between the second magnetic yoke and the stabilizing magnet 52 is not affected by the OIS stroke. This allows the technical solution of this application to achieve a larger stroke and makes resetting easier.

[0104] Furthermore, in this embodiment, a guide mechanism 54 is provided between the lens mount 13 of the photosensitive component 10 and the fixed carrier 53. The guide mechanism 54 includes at least one track and ball bearings disposed between the tracks. To improve the stability of the camera module's movement during optical image stabilization and enhance image quality, a track is provided between the lens mount 13 and the fixed carrier 53, and the ball bearings are housed within the track. This ensures that the lens mount 13 is always supported during optical image stabilization as it moves relative to the fixed carrier 53, allowing it to slide smoothly. Additionally, since the track has a direction, the ball bearings' trajectory is confined within the track, thus providing guidance during the movement of the photosensitive component 10. Furthermore, since the ball bearings can use rolling friction instead of sliding friction, the friction between the lens mount 13 and the fixed carrier 53 can be further reduced. Specifically, a track along the x-axis is provided on the bottom surface of the fixed carrier 53, and a track along the y-axis is provided on the upper surface of the lens mount 13 (the bottom and upper surfaces refer to the direction along the optical axis, from the photosensitive chip 12 to the lens). The x-axis track and the y-axis track are arranged opposite each other to form a cross-shaped receiving cavity to accommodate the ball bearings. Each receiving cavity contains one ball bearing, and the number of receiving cavities and ball bearings is at least three, preferably four, to ensure the stability of the photosensitive component 10. During optical image stabilization, the ball bearings and track serve as a guide mechanism 54, providing a greater OIS travel for the photosensitive component 10. Of course, in other embodiments of this application, both x-axis and y-axis tracks can be provided on the upper surface of the lens mount 13, with the two tracks on the same side located on the same side of the lens mount 13. In contrast, a track perpendicular to the upper surface of the mirror mount 13 is provided on the lower surface of the fixed carrier 53. That is, a track in the y-axis direction is provided on the fixed carrier 53 at a position opposite to the track in the x-axis direction on the mirror mount 13, and a track in the x-axis direction is provided on the fixed carrier 53 at a position opposite to the track in the y-axis direction on the mirror mount 13, so as to avoid interference.

[0105] To enable circuitry of the camera module, a conductive structure is provided on the fixed carrier 53, which facilitates communication between the camera module and the motherboard of an external electronic device. Further, the conductive structure is a stabilization substrate (for example, the stabilization substrate can be a PCB board or an FPC board; this is not limited to this application). The stabilization substrate is located at the bottom of the fixed carrier 53 and extends outward from the side, enabling circuitry with an external connector. The circuit board 11 of the photosensitive component 10 extends upward to the stabilization substrate, achieving circuitry with it. The focusing substrate can also extend downward to the stabilization substrate to achieve circuitry with it. Furthermore, when the photosensitive component 10 is used to implement chip-based image stabilization, the stabilization coil 51 can be directly attached to the stabilization substrate to simplify the circuitry.

[0106] In other embodiments of this application, the circuit can also be integrally formed onto the fixed carrier 53 using insert molding technology, and then connected to the outside of the telescopic camera module via the fixed carrier 53. Alternatively, at least two LDS grooves can be formed on the surface of the fixed carrier 53, with a depth of no more than 20-30 μm and a width of no less than 60 μm. LDS (laser direct forming) technology can be used inside the grooves, and a conductive plating layer (e.g., a nickel-palladium-gold plating layer) can be deposited on the surface of the LDS grooves to avoid interference from other internal metals and achieve circuit conduction.

[0107] In other words, in order to simplify the conductive structure, the circuit of the camera module is concentrated on the conductive structure of the fixed carrier 53, and the circuit of the camera module and the motherboard of the external electronic device is connected through the fixed carrier 53.

[0108] Of course, in other embodiments of this application, the focusing substrate and the image stabilization substrate can also extend downward to the circuit board 11 of the photosensitive component 10, and the circuit board 11 can be used to achieve communication with external circuits. Furthermore, in other embodiments of this application, the image stabilization coil 51 can be disposed on the lens mount 13, and the image stabilization magnet 52 can be disposed on the fixing carrier 53, with the image stabilization coil 51 and the image stabilization magnet 52 facing each other. Subsequently, the second magnetic yoke and the second position sensing element are also disposed on the lens mount 13, and are positioned opposite to the image stabilization magnet 52. Specifically, in the embodiments of this application, the position sensing element 37 is disposed within the image stabilization coil 51, and is positioned opposite to the image stabilization magnet 52.

[0109] Furthermore, in this embodiment, the housing 40 is fitted over the driving assembly, and the housing 40 has an opening corresponding to the optical lens 20. It is understood that the optical lens 20 can participate in the assembly process of the camera module before the housing 40. That is, in this embodiment, after the housing 40 is assembled onto the lens mount 13, it is not necessary to install the optical lens 20 into the driving assembly through the opening. Therefore, the diameter of the opening of the housing 40 can be reduced. It should be understood that reducing the diameter of the opening helps prevent external dust, dirt, or stray light from entering the interior of the camera module. The housing 40 can be made of metal, such as cold-rolled carbon steel sheet (SPCC) or stainless steel, etc., to provide a certain magnetic conductivity and strengthen the magnetic field.

[0110] In summary, a camera module based on the embodiments of this application is explained, wherein the focusing drive component 30 of the camera module has a special structural configuration. Specifically, it effectively solves the problem of tilting of the focusing drive component 30 when it is static by means of the special relative positional relationship between the ball-groove structure and the magnetic suction component 34.

[0111] Indicative focus drive component

[0112] According to another aspect of this application, a focus drive component 30 is also provided.

[0113] Specifically, the focusing drive assembly 30 includes: a fixed base 31; a movable carrier 32 installed in the fixed base 31, with a gap 300 between the movable carrier 32 and the fixed base 31; at least one electromagnetic drive unit disposed in the gap 300; a magnetic attraction assembly 34 disposed in the gap 300; and a first ball-groove structure 38 and a second ball-groove structure 39 formed in the gap 300; wherein the first ball-groove structure 38 and the second ball-groove structure 39 are arranged symmetrically with respect to the magnetic attraction assembly 34.

[0114] In one example of the focusing drive assembly 30 according to an embodiment of the present application, the gap 300 has a first portion 310 located at the corner of the fixed carrier, and the magnetic suction assembly 34 is disposed in the first portion 310 of the gap 300.

[0115] In one example of the focusing drive assembly 30 according to an embodiment of this application, the magnetic attraction assembly 34 includes a sensing magnet 341 disposed on the outer side wall of the movable carrier 32 and a reset yoke 342 disposed on the inner side wall of the fixed base 31 and disposed opposite to the sensing magnet 341.

[0116] In one example of the focusing drive assembly 30 according to an embodiment of this application, the first ball-groove structure 38 and the second ball-groove structure 39 are arranged symmetrically with respect to the central axis of the reset yoke 342.

[0117] In one example of the focusing drive assembly 30 according to an embodiment of this application, the first ball-groove structure 38 includes a first channel 381 formed on the outer peripheral wall of the movable carrier 32, a second channel 382 formed on the inner peripheral wall of the fixed base 31, the first channel 381 and the second channel 382 cooperating to form a first groove 380, and at least one first ball 383 disposed in the groove; the second ball-groove structure 39 includes a third channel 391 formed on the outer peripheral wall of the movable carrier 32, a fourth channel 392 formed on the inner peripheral wall of the fixed base 31, the third channel 391 and the fourth channel 392 cooperating to form a second groove 390, and at least one second ball 393 disposed in the groove.

[0118] In one example of the focus drive assembly 30 according to an embodiment of this application, the line connecting the centers of the first ball 383 and the second ball 393 is perpendicular to the central axis of the reset yoke 342.

[0119] In one example of the focusing drive assembly 30 according to an embodiment of this application, the magnetic attraction force generated by the magnetic attraction assembly 34 is in the same direction as the clamping force of the first channel 381 and the second channel 382 on the first ball 383; and / or, the magnetic attraction force generated by the magnetic attraction assembly 34 is in the same direction as the clamping force of the third channel 391 and the fourth channel 392 on the second ball 393.

[0120] In one example of the focusing drive assembly 30 according to an embodiment of this application, the outer peripheral wall of the movable carrier 32 has a first cross-section 321 located at its corner; the inner peripheral wall of the fixed base 31 has a second cross-section 311 located at its corner and opposite to the first cross-section 321; wherein the first cross-section 321 and the second cross-section 311 form a first portion 310 of the gap 300; wherein at least one side of the first channel 381 and the second channel 382 is parallel to the second cross-section 311, and at least one side of the third channel 391 and the fourth channel 392 is parallel to the second cross-section 311.

[0121] In one example of the focusing drive assembly 30 according to an embodiment of this application, the gap 300 further has a second portion 320 extending laterally from the first portion 310 and a third portion 330 extending longitudinally from the first portion 310, with a preset angle between the second portion 320 and the third portion 330; wherein, the at least one coil-magnet pair includes a first coil-magnet pair and a second coil-magnet pair respectively disposed in the second portion 320 and the third portion 330 of the gap 300.

[0122] In one example of the focusing drive assembly 30 according to an embodiment of this application, the first ball-groove structure 38 and the first coil-magnet pair are located on the same side of the movable carrier 32; and / or, the second ball-groove structure 39 and the second coil-magnet pair are located on the same side of the movable carrier 32.

[0123] In one example of the focusing drive assembly 30 according to an embodiment of this application, the first ball-groove structure 38 and the first coil-magnet pair are located on different sides of the movable carrier 32; and / or, the second ball-groove structure 39 and the second coil-magnet pair are located on different sides of the movable carrier 32.

[0124] In one example of the focusing drive assembly 30 according to an embodiment of this application, the gap 300 further has a second portion 320 extending laterally from the first portion 310 and a third portion 330 extending longitudinally from the first portion 310, with a preset angle between the second portion 320 and the third portion 330; wherein, the at least one coil-magnet pair includes a first coil-magnet pair and a second coil-magnet pair respectively disposed in the second portion 320 and the third portion 330 of the gap 300.

[0125] In one example of the focusing drive assembly 30 according to an embodiment of this application, the included angle between the second portion 320 and the third portion 330 is 90°, and the included angle between the first coil-magnet pair and the second coil 352 magnet pair is 90°.

[0126] In one example of the focusing drive assembly 30 according to an embodiment of this application, the outer peripheral wall of the movable carrier 32 has a first cross-section 321 located at its corner, a first transverse surface 322 extending laterally from the first cross-section 321, and a first longitudinal surface 323 extending longitudinally from the first cross-section 321; the inner peripheral wall of the fixed base 31 has a second cross-section 311 located at its corner and opposite to the first cross-section 321, a second transverse surface 312 extending laterally from the second cross-section 311 and opposite to the first transverse surface 322, and a second longitudinal surface 313 extending longitudinally from the second cross-section 311 and opposite to the first longitudinal surface 323; wherein the first cross-section 321 and the second cross-section 311 form a first portion 310 of the gap 300; the first transverse surface 322 and the second transverse surface 312 form a second portion 320 of the gap 300; and the first longitudinal surface 323 and the second longitudinal surface 313 form a third portion 330 of the gap 300.

[0127] In one example of the focusing drive assembly 30 according to an embodiment of this application, the angle between the first horizontal surface 322 and the first sectional surface 321 is equal to the angle between the first vertical surface 323 and the first sectional surface 321; and / or, the angle between the second horizontal surface 312 and the second sectional surface 311 is equal to the angle between the second vertical surface 313 and the second sectional surface 311.

[0128] In one example of the focusing drive assembly 30 according to an embodiment of this application, the shape of the outer peripheral wall of the movable carrier 32 is adapted to the shape of the inner peripheral wall of the fixed base 31.

[0129] In one example of the focus drive assembly 30 according to an embodiment of the present application, the focus drive assembly 30 further includes a drive circuit board 36 extending over a first portion 310, a second portion 320, and a third portion 330 of the gap 300, wherein the drive circuit board has a first drive circuit sub-board 361 located in the first portion 310 of the gap 300, a second drive circuit sub-board 362 located in the second portion 320 of the gap 300, and a third drive circuit sub-board 363 located in the third portion 330 of the gap 300.

[0130] In one example of the focusing drive assembly 30 according to an embodiment of this application, the first drive circuit sub-board 361 is attached to the second cross-section 311, the second drive circuit sub-board 362 is attached to the second transverse surface 312, and the third drive circuit sub-board 363 is attached to the second longitudinal surface 313.

[0131] In one example of the focus drive assembly 30 according to an embodiment of this application, the reset yoke 342 is located in the middle region of the first drive circuit sub-board 361.

[0132] In one example of the focus drive assembly 30 according to an embodiment of this application, the focus drive assembly 30 further includes a position sensing element 37 disposed on the first drive circuit sub-board and facing the sensing magnet 341, the position sensing element 37 being configured to sense the movement position of the sensing magnet 341.

[0133] In summary, the focusing drive assembly 30 according to the embodiments of this application is explained, which effectively solves the problem of tilting of the focusing drive assembly 30 when it is static by means of the special relative positional relationship between the ball-groove structure and the magnetic attraction assembly 34.

[0134] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

Claims

1. A focus drive assembly, characterized by, The application relates to a magnetic drive device, comprising: a fixed base; a movable carrier installed in the fixed base, a gap being formed between the movable carrier and the fixed base; at least one electromagnetic drive unit arranged in the gap; a magnetic attraction assembly arranged in the gap, the magnetic attraction assembly comprising a sensing magnet arranged on an outer sidewall of the movable carrier and a reset yoke arranged on an inner sidewall of the fixed base and opposite to the sensing magnet; a first ball-groove structure and a second ball-groove structure formed in the gap; wherein the first ball-groove structure and the second ball-groove structure are symmetrically arranged relative to the magnetic attraction assembly; the gap has a first part located at a corner of the fixed base, a second part extending transversely from the first part, and a third part extending longitudinally from the first part, the second part and the third part have a preset angle therebetween; the magnetic attraction assembly is arranged in the first part of the gap; the at least one electromagnetic drive unit comprises a first coil-magnet pair arranged in the second part and a second coil-magnet pair arranged in the third part. The first ball-groove structure and the second ball-groove structure are symmetrically arranged relative to a central axis of the reset yoke.

2. The focus drive assembly of claim 1, wherein, The first ball-groove structure comprises a first channel formed on an outer circumferential wall of the movable carrier, a second channel formed on an inner circumferential wall of the fixed base, the first channel and the second channel cooperatively forming a first groove, and at least one first ball arranged in the groove; the second ball-groove structure comprises a third channel formed on the outer circumferential wall of the movable carrier, a fourth channel formed on the inner circumferential wall of the fixed base, the third channel and the fourth channel cooperatively forming a second groove, and at least one second ball arranged in the groove.

3. The focus drive assembly of claim 2, wherein, The first ball and the second ball have their centers of spheres arranged perpendicularly to the central axis of the reset yoke.

4. The focus drive assembly of claim 3, wherein, The magnetic attraction force generated by the magnetic attraction assembly is in the same direction as the clamping force of the first channel and the second channel on the first ball; and / or the magnetic attraction force generated by the magnetic attraction assembly is in the same direction as the clamping force of the third channel and the fourth channel on the second ball.

5. The focus drive assembly of claim 4, wherein, The outer circumferential wall of the movable carrier has a first tangent surface located at a corner thereof; the inner circumferential wall of the fixed base has a second tangent surface located at a corner thereof and opposite to the first tangent surface; the first tangent surface and the second tangent surface form the first part of the gap.

6. The focus drive assembly of claim 5, wherein, At least one side of the first channel and the second channel is parallel to the second tangent surface, and at least one side of the third channel and the fourth channel is parallel to the second tangent surface. The first ball-groove structure and the first coil-magnet pair are located on the same side of the movable carrier; and / or the second ball-groove structure and the second coil-magnet pair are located on the same side of the movable carrier.

7. The focus drive assembly of claim 6, wherein, ​ 8. The focus drive assembly of claim 6, wherein, The first ball-and-groove structure and the first coil-magnet pair are located on different sides of the movable carrier; and / or, the second ball-and-groove structure and the second coil-magnet pair are located on different sides of the movable carrier.

9. The focus drive assembly of claim 1, wherein, An angle between the second portion and the third portion is 90°, and an angle between the first coil-magnet pair and the second coil-magnet pair is 90°.

10. The focus drive assembly of claim 9, wherein, The outer peripheral wall of the movable carrier has a first tangent surface located at a corner portion thereof, a first horizontal surface extending transversely from the first tangent surface, and a first longitudinal surface extending longitudinally from the first tangent surface; the inner peripheral wall of the fixed base has a second tangent surface located at a corner portion thereof and opposite to the first tangent surface, a second horizontal surface extending transversely from the second tangent surface and opposite to the first horizontal surface, and a second longitudinal surface extending longitudinally from the second tangent surface and opposite to the first longitudinal surface; The first tangent surface and the second tangent surface form a first portion of the gap; the first horizontal surface and the second horizontal surface form a second portion of the gap; and the first longitudinal surface and the second longitudinal surface form a third portion of the gap.

11. The focus drive assembly of claim 10, wherein, An angle between the first horizontal surface and the first tangent surface is equal to an angle between the first longitudinal surface and the first tangent surface; and / or, an angle between the second horizontal surface and the second tangent surface is equal to an angle between the second longitudinal surface and the second tangent surface.

12. The focus drive assembly of claim 11, wherein, The shape of the outer peripheral wall of the movable carrier is adapted to the shape of the inner peripheral wall of the fixed base.

13. The focus drive assembly of claim 10, wherein, The focus driving assembly further comprises a driving circuit board extending through the first portion, the second portion and the third portion of the gap, wherein the driving circuit board has a first driving circuit sub-board located at the first portion of the gap, a second driving circuit sub-board located at the second portion of the gap, and a third driving circuit sub-board located at the third portion of the gap.

14. The focus drive assembly of claim 13, wherein, The first driving circuit sub-board abuts against the second tangent surface, the second driving circuit sub-board abuts against the second horizontal surface, and the third driving circuit sub-board abuts against the second longitudinal surface.

15. The focus drive assembly of claim 14, wherein, The reset yoke is located between the first coil and the second coil.

16. The focus drive assembly of claim 15, wherein, The focus driving assembly further comprises a position sensing element disposed on the first driving circuit sub-board and facing the sensing magnet, the position sensing element being configured to sense a moving position of the sensing magnet.

17. An image capture module, comprising: The focus driving assembly comprises: a light sensing assembly; an optical lens held in a light sensing path of the light sensing assembly; and a focus driving assembly as claimed in any one of claims 1 to 16 for driving the optical lens to move along the light sensing path for optical focusing. The focus driving assembly further comprises an anti-shake driving assembly for driving the light sensing assembly to move for optical anti-shake.

18. The camera module of claim 17, wherein, ​

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