Optical actuator, camera module and electronic device

Abstract

The present disclosure relates to an optical actuator, a camera module and an electronic device. The optical actuator comprises a first mount, a second mount and a third mount. The first mount is configured to mount an optical device. The first mount is configured to move in a shake compensation direction relative to the second mount. The second mount is configured to drive the first mount and move in a focus adjustment direction relative to the third mount. The optical actuator further comprises an OIS driving unit and an AF driving unit. The OIS driving unit comprises two OIS magnets and an OIS coil between the two OIS magnets. The two OIS magnets and the OIS coil are arranged along a driving direction of the OIS driving unit. A ring surface of the OIS coil is perpendicular to the driving direction. Magnetic poles of the two OIS magnets are opposite to each other. The magnetic poles of the two OIS magnets are magnetized in the same direction as the driving direction. The two OIS magnets and the OIS coil jointly act on each other, thereby improving a driving force of the OIS driving unit.

Description

Technical Field

[0001] This disclosure relates to the field of electronic cameras, and more specifically, to optical actuators, camera modules, and electronic devices. Background Technology

[0002] In the field of electronic device photography, to improve image quality, the optical components in the camera module are usually movable, such as for focusing, zooming, or optical image stabilization. To achieve optical image stabilization, common drive motors include cooperating coils and magnets, usually arranged perpendicular to the direction of shaking. To increase driving force, some related technologies have changed the arrangement of the two components to the same direction as the shaking direction. For example, Chinese patent application number CN202121355552.6 discloses an optical device drive mechanism, which includes cooperating magnets and coils, with the coils arranged in the same direction as the shaking direction. However, in practice, it has been found that this layout still has insufficient driving force. Summary of the Invention

[0003] The purpose of this disclosure is to provide an optical actuator, camera module, and electronic device that at least partially solves the problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides an optical actuator, including a first mounting base, a second mounting base, and a third mounting base. The first mounting base is used to mount optical devices and is configured to move relative to the second mounting base in a jitter compensation direction. The second mounting base is configured to drive the first mounting base and move relative to the third mounting base in a focusing direction. The optical actuator further includes: an OIS driving unit for driving the first mounting base to move; and an AF driving unit for driving the second mounting base to move. The OIS driving unit includes two OIS magnets and an OIS coil located between the two OIS magnets. One of the two OIS magnets and the OIS coil is mounted on the first mounting base, and the other is mounted on the second mounting base. The two OIS magnets and the OIS coil are arranged along their driving direction, and the annular surface of the OIS coil is perpendicular to its driving direction. The magnetic poles of the two OIS magnets are opposite in direction, and their magnetization directions are both the same as their driving direction.

[0005] Accordingly, this disclosure provides an optical actuator, including a first mounting base, a second mounting base, and a third mounting base. The first mounting base is used to mount optical devices and is configured to move relative to the second mounting base in a focusing direction. The second mounting base is configured to drive the first mounting base and move relative to the third mounting base in a jitter compensation direction. The optical actuator further includes: an OIS driving unit for driving the second mounting base to move; and an AF driving unit for driving the first mounting base to move. The OIS driving unit includes two OIS magnets and an OIS coil located between the two OIS magnets. One of the two OIS magnets and the OIS coil is mounted on the second mounting base, and the other is mounted on the third mounting base. The two OIS magnets and the OIS coil are arranged along their driving direction, and the annular surface of the OIS coil is perpendicular to its driving direction. The magnetic poles of the two OIS magnets are opposite in direction, and their magnetization directions are the same as their driving direction.

[0006] Optionally, the OIS driving unit further includes a magnetic yoke arranged around the two OIS magnets and the OIS coil. The magnetic yoke is constructed as a long cylindrical structure with a rectangular cross-section and is fitted around the two OIS magnets and the OIS coil. Alternatively, the magnetic yoke includes two long strip segments, wherein the two long strip segments are symmetrically distributed on both sides of the OIS driving unit, and the arrangement direction of the two long strip segments is perpendicular to the driving direction of the OIS driving unit.

[0007] Optionally, when the magnetic yoke is constructed as a long cylindrical structure, the magnetic yoke includes a long strip semi-enclosed section with a U-shaped cross-section and a cover plate section that is detachably fastened to the open end of the semi-enclosed section, wherein the connection between the semi-enclosed section and the cover plate section is respectively constructed as matching serrations so that the two can be detachably fastened together.

[0008] Optionally, the third mounting base is configured to include a third base plate and a third upright plate disposed around the third base plate, and the second mounting base is configured to include a second base plate and a second upright plate disposed around the second base plate. The second mounting base is arranged in the receiving space of the third mounting base, and the first mounting base is arranged in the receiving space of the second mounting base.

[0009] Optionally, an OIS abutment member is provided between the first mounting base and the second base plate. The OIS abutment member includes at least three ball grooves and OIS balls respectively installed in the ball grooves.

[0010] Optionally, the second mounting base further includes a limiting plate located on the opposite side of the second base plate and fixed to the second upright plate, wherein the limiting plate and the first mounting base are spaced apart and the gap between them is configured such that when the first mounting base abuts against the limiting plate, the OIS ball cannot disengage from the ball groove corresponding to it.

[0011] Optionally, the optical actuator further includes an FPC assembly, which includes a first FPC for electrical connection to the OIS driving unit and a second FPC for electrical connection to the AF driving unit. The first FPC includes a first straight plate segment and a second straight plate segment that are perpendicular to each other. The first straight plate segment and the second straight plate segment are respectively fixed on the second upright plate, and the OIS coil is fixed on the first FPC. The second FPC is plate-shaped and fixed on the third upright plate.

[0012] Optionally, the first FPC further includes a transmission arm segment connecting the second straight plate segment, wherein the end of the transmission arm segment away from the second straight plate segment is constructed as a plate, and the plate-shaped end of the transmission arm segment and the second FPC are fixed on the same third vertical plate.

[0013] Optionally, it further includes a reinforcing steel plate attached to the first straight plate segment and the second straight plate segment, wherein an OIS abutment member is provided between the first mounting base and the second base plate, the OIS abutment member includes at least three ball grooves and OIS balls respectively installed in the ball grooves, the second mounting base further includes a limiting plate located on the opposite side of the second base plate and fixed to the second upright plate, wherein the limiting plate is spaced apart from the first mounting base and the gap between them is configured such that when the first mounting base abuts against the limiting plate, the OIS balls cannot disengage from their corresponding ball grooves, and wherein the limiting plate is fixed to the reinforcing steel plate.

[0014] Optionally, the optical actuator further includes two OIS position sensors respectively mounted on the first straight plate segment and the second straight plate segment, wherein the OIS position sensors are centrally located inside the OIS coil.

[0015] Optionally, the plate-shaped ends of the second FPC and the transmission arm segment at least partially protrude from the third base plate, and the third mounting base is formed with an elongated reinforcing structure opposite to the opening direction of the third mounting base, wherein the reinforcing structure fits against the protruding portion of the second FPC.

[0016] Optionally, an AF abutment member is provided between the second upright plate and the third upright plate. The AF abutment member includes two parallel first sliding shafts extending along the driving direction of the AF driving unit and an AF ball abutting between the two first sliding shafts. The two first sliding shafts are attached to each other or fixed at intervals on the third upright plate. The AF ball abuts against the two first sliding shafts on one side and directly or indirectly abuts against the second upright plate on the other side.

[0017] Optionally, the AF abutment member includes a guide portion and a support portion, wherein the AF ball bearings of the support portion abut against the first slide shaft and the second upright plate; the guide portion further includes two parallel second slide shafts extending along the driving direction of the AF drive unit, the second slide shafts being fixed on the second upright plate at positions corresponding to the first slide shafts, and the AF ball bearings of the guide portion abut against the two first slide shafts and the two second slide shafts.

[0018] Optionally, the number of AF balls in the support portion is at least one; the number of AF balls in the guide portion is multiple.

[0019] Optionally, a through mounting hole is formed on the third upright plate for sequentially mounting the AF ball and the first sliding shaft in a lateral direction. The AF ball is at least partially located in the mounting hole so that the two sets of opposing inner walls of the mounting hole can respectively restrict the radial and axial movement of the AF ball along the first sliding shaft.

[0020] Optionally, the side of the third upright plate opposite to the second upright plate is recessed to form a mounting groove, the first sliding shaft abuts against the stepped surface of the mounting groove close to the second upright plate, and the mounting hole is formed on the stepped surface.

[0021] Optionally, the optical actuator further includes a groove-shaped housing with one end open, the housing being fitted onto the third mounting base from one side of the opening of the third mounting base, and an injection hole being provided on the housing at a position corresponding to the mounting groove.

[0022] Optionally, a reset assembly is provided between the first mounting base and the second mounting base. The reset assembly includes a first magnetic element fixed on the first mounting base and a second magnetic element fixed on the second base plate that attracts the first magnetic element.

[0023] Optionally, each group of OIS drive units corresponds to two sets of reset components, and the two sets of reset components are symmetrically distributed on both sides of the center of the first mounting base.

[0024] Optionally, metal plates are pre-embedded inside the first mounting base, the second mounting base, and the third mounting base.

[0025] According to a second aspect of this disclosure, a camera module is provided, including optical components and the aforementioned optical actuator.

[0026] According to a third aspect of this disclosure, an electronic device is provided, including the camera module described above.

[0027] Through the above technical solution, two OIS magnets with opposite magnetic poles are respectively set on both sides of the annular surface of the OIS coil. When the OIS coil is energized, the OIS coil can generate a corresponding magnetic field due to the magnetoelectric effect. The two OIS magnets can generate magnetic forces in the same direction with the OIS coil, thereby improving the driving force of the OIS drive unit.

[0028] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is an exploded view of a first type of optical actuator exemplarily shown according to this disclosure;

[0031] Figure 2 This is an exploded view of a second type of optical actuator shown in an embodiment of the present disclosure at one angle;

[0032] Figure 3 This is an exploded view from another angle of the second type of optical actuator exemplarily shown according to this disclosure;

[0033] Figure 4 This is an exploded view of a third type of optical actuator exemplarily shown according to this disclosure;

[0034] Figure 5 This is a top-view cross-sectional view of a second type of optical actuator exemplarily illustrated according to this disclosure;

[0035] Figure 6 yes Figure 5 A magnified view of part A in the middle;

[0036] Figure 7 This is a schematic diagram of a third mounting base for a second type of optical actuator exemplarily shown according to this disclosure;

[0037] Figure 8 This is a schematic diagram of an FPC assembly of a second type of optical actuator exemplarily shown according to this disclosure at one angle;

[0038] Figure 9This is a schematic diagram of the FPC assembly of a second type of optical actuator exemplarily shown according to this disclosure from another angle;

[0039] Figure 10 This is a schematic diagram of an FPC assembly of a first type of optical actuator exemplarily shown according to this disclosure;

[0040] Figure 11 This is a schematic diagram of a first FPC of a first type of optical actuator exemplarily shown according to this disclosure;

[0041] Figure 12 This is a schematic diagram of a driving unit exemplarily shown according to this disclosure;

[0042] Figure 13 This is a schematic diagram of a camera module exemplarily shown according to this disclosure;

[0043] Figure 14 This is a schematic diagram of an electronic device illustrated by way of example according to this disclosure.

[0044] Explanation of reference numerals in the attached figures

[0045] 1100, 2100 - First mounting base; 1200, 2200 - Second mounting base; 1300, 2300 - Third mounting base; 1510, 2510 - First FPC; 1511, 2511 - First straight plate segment; 1512, 2512 - Second straight plate segment; 1513 - Transmission arm segment; 1514 - Reinforcing steel plate; 1520, 2520 - Second FPC; 210 - Second base plate; 220 - Second upright plate; 230 - Limiting plate; 310 - OIS magnet; 320 - OIS coil; 330 - Third base plate; 340 - Third upright plate; 410 - Mounting Hole; 420-Mounting slot; 530-Connecting arm; 531-Straight section; 532-Bent section; 600-OIS position sensor; 700-Magnetic yoke; 710-Semi-enclosed section; 720-Cover plate section; 730-Long strip plate section; 800-Reset assembly; 910-OIS abutment member; 911-Ball groove; 912-OIS ball; 920-AF abutment member; 921-First sliding shaft; 922-AF ball; 923-Second sliding shaft; 1000-Housing shell; 1001-Injection hole; 1301-Reinforcing structure; 1400-Dispensing groove; 1500-Optical components. Detailed Implementation

[0046] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0047] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" are defined based on the actual orientation of the corresponding components in use. For example, "outer periphery" of the magnetic yoke being fitted around the two OIS magnets and the OIS coil means that the two OIS magnets and the OIS coil are arranged within the receiving space of the cylindrical magnetic yoke. "Inner side" of the OIS position sensor being centrally located within the OIS coil means that the OIS position sensor is located within the area enclosed by the OIS coil.

[0048] In addition, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0049] Reference Figures 1-3 This disclosure provides an optical actuator, including a first mounting base 1100, a second mounting base 1200, and a third mounting base 1300. The first mounting base 1100 is used to mount optical components. The first mounting base 1100 is configured to move relative to the second mounting base 1200 in a jitter compensation direction. The second mounting base 1200 is configured to drive the first mounting base 1100 and move relative to the third mounting base 1300 in a focusing direction. The optical actuator further includes: an OIS driving unit for driving the first mounting base 1100 to move; and an AF driving unit for driving the second mounting base 1100 to move. The 200 movement, wherein the OIS drive unit includes two OIS magnets 310 and an OIS coil 320 located between the two OIS magnets 310. One of the two OIS magnets 310 and the OIS coil 320 is mounted on a first mounting base 1100, and the other is mounted on a second mounting base 1200. The two OIS magnets 310 and the OIS coil 320 are arranged along their driving direction, and wherein the annular surface of the OIS coil 320 is perpendicular to its driving direction, the magnetic poles of the two OIS magnets 310 are opposite, and their magnetization directions are the same as their driving directions.

[0050] Here, it needs to be explained that the plane in which the jitter compensation direction is located refers to... Figure 2 The plane containing the X and Y directions is perpendicular to the focusing direction, i.e., the Z direction mentioned below. In this embodiment, the first mounting base 1100 is configured to perform image-stabilizing movement relative to the second mounting base 1200 along the X and / or Y directions; the aforementioned focusing direction refers to... Figure 2In the Z direction, the second mounting base 1200 is configured to drive the first mounting base 110 and perform focusing motion relative to the third mounting base 1300 along the Z direction. The X, Y, and Z directions are mutually perpendicular. The annular surface of the OIS coil 320 refers to the annular cross-section formed by its multiple turns of wire, which is perpendicular to the aforementioned jitter compensation direction. Thus, when energized, the magnetic pole direction generated according to Ampere's law is the same as the jitter compensation direction. The opposite magnetic pole directions of the two OIS magnets 310 mean that the magnetic pole directions of the two OIS magnets 310 are configured to be opposite in the jitter compensation direction.

[0051] By using the above technical solution, two OIS magnets 310 with opposite magnetic poles are respectively arranged on both sides of the annular surface of the OIS coil 320. When the OIS coil 320 is energized, due to the magnetoelectric effect, the OIS coil 320 can generate a corresponding magnetic field. The two OIS magnets 310 can generate magnetic forces in the same direction with the OIS coil 320, thereby increasing the driving force of the OIS drive unit. Specifically, in the prior art, when the OIS magnet 310 and the OIS coil 320 move relative to each other, since only one OIS magnet 310 is arranged, the distance between the OIS magnet 310 and the OIS coil 320 can only gradually increase or decrease. The magnitude of the magnetic force between the OIS magnet 310 and the OIS coil 320 is positively correlated with the distance, which leads to insufficient driving force when the distance is large. According to the technical solution disclosed herein, when the OIS coil 320 is far away from one OIS magnet 310, it can simultaneously approach another OIS magnet 310, so that regardless of the positional relationship between the OIS magnet 310 and the OIS coil 320, the OIS driving unit always has a strong driving force.

[0052] The above embodiments involve driving the OIS components to move along the focusing direction via an AF drive unit. Correspondingly, this disclosure also provides a second embodiment where the OIS drive unit drives the AF components to move along the image stabilization compensation direction. Specifically:

[0053] Reference Figure 4In this embodiment, an optical actuator is provided, including a first mounting base 2100, a second mounting base 2200, and a third mounting base 2300. The first mounting base 2100 is used to mount optical components. The first mounting base 2100 is configured to move relative to the second mounting base 2200 in a focusing direction. The second mounting base 2200 is configured to drive the first mounting base 2100 and move relative to the third mounting base 2300 in a jitter compensation direction. The optical actuator further includes: an OIS driving unit for driving the second mounting base 2200 to move; and an AF driving unit for driving the first mounting base 2100 to move. The OIS drive unit, denoted as 2100, includes two OIS magnets 310 and an OIS coil 320 located between them. One of the OIS magnets 310 and the OIS coil 320 is mounted on a second mounting base 2200, and the other is mounted on a third mounting base 2300. The three components—the two OIS magnets 310 and the OIS coil 320—are arranged along the drive direction. The annular surface of the OIS coil 320 is perpendicular to the drive direction. The magnetic poles of the two OIS magnets 310 are opposite, and their magnetization directions are the same as their drive direction. Similar to the first embodiment described above, in this embodiment, the jitter compensation direction movement is along... Figure 4 The movement in the X and Y directions; the movement in the focusing direction is... Figure 4 The optical actuator of the second embodiment has all the beneficial effects of the optical actuator of the first embodiment described above, and will not be repeated here.

[0054] To further improve the utilization rate of the magnetic field of OIS magnet 310, thereby increasing the driving force of the OIS drive unit, refer to Figures 1-4 In embodiments of this disclosure, the OIS driving unit may further include a magnetic yoke 700 disposed around the two OIS magnets 310 and the OIS coil 320. The magnetic yoke 700 may be constructed as a long cylindrical structure with a rectangular cross-section and fitted around the two OIS magnets 310 and the OIS coil 320. When the magnetic yoke 700 is disposed around the outer periphery of the OIS magnet 310, the magnetic field lines are more compact and dense, the magnetic field utilization is higher, and thus the driving force of the OIS driving unit is greater. In other embodiments, the driving force of the OIS driving unit may be increased by increasing the current in the OIS coil 320, or the driving force of the OIS driving unit may be increased by enhancing the magnetic field strength of the OIS magnets 310. This disclosure does not limit this to any particular embodiment.

[0055] This disclosure does not limit the shape and size of the magnetic yoke 700. Besides the rectangular cylindrical shape described above, in other embodiments, the magnetic yoke 700 can be constructed as a U-shaped semi-enclosed structure, in which the OIS magnet 310 and OIS coil 320 can be placed within the accommodating space formed by the semi-enclosed structure. Alternatively, refer to... Figure 12 In some other embodiments, the magnetic yoke 700 may include two elongated plate segments 730, wherein the two elongated plate segments 730 may be symmetrically distributed on both sides of the OIS driving unit, and the arrangement direction of the two elongated plate segments 730 is perpendicular to the driving direction of the OIS driving unit, and the OIS coil 320 and the OIS magnet 310 are located in the space between the two elongated plate segments 730.

[0056] Furthermore, to facilitate the installation of the OIS magnet 310 and OIS coil 320 within the elongated cylindrical yoke 700, refer to... Figures 1-4 The magnetic yoke 700 may include a U-shaped elongated semi-enclosed section 710 and a cover plate section 720 detachably fastened to the open end of the semi-enclosed section 710. The connection between the semi-enclosed section 710 and the cover plate section 720 may be constructed with matching serrations to allow for detachable fastening. The cross-section of the serrations may be rectangular or trapezoidal to form a dovetail groove for easy assembly. During installation, the OIS magnet 310 and OIS coil 320 are first installed in the receiving space of the U-shaped elongated semi-enclosed section 710, and then the cover plate section 720 is fastened to the open side of the elongated semi-enclosed section. Furthermore, in some other embodiments, the cover plate section 720 and the elongated semi-enclosed section 710 may also be connected by adhesive bonding.

[0057] Reference Figures 1-4 In some embodiments, the third mounting base 1300 may be configured to include a third base plate 330 and a third upright plate 340 disposed around the third base plate 330, and the second mounting base 1200 may be configured to include a second base plate 210 and a second upright plate 220 disposed around the second base plate 210. The second mounting base 1200 may be arranged in the receiving space of the third mounting base 1300, and the first mounting base 1100 may be arranged in the receiving space of the second mounting base 1200. Here, it should be explained that the second mounting base 1200 and the third mounting base 1300 are not absolutely standard slot-shaped structures with one end open. Furthermore, the second upright plate 220 and the third upright plate 340 are not necessarily closed structures joined end to end. They may include multiple upright plates spaced apart and arranged around the corresponding base plates. This disclosure does not limit the number and structure of the upright plates, and includes all plate-like structures surrounding the base plates.

[0058] This disclosure does not limit the assembly method of the upright plate and the base plate. For example, in some embodiments, the upright plate and the base plate may be integrally formed. In addition, in other embodiments, the upright plate may be glued to the base plate.

[0059] Reference Figures 1-6In some embodiments, an OIS abutment member 910 may be provided between the first mounting base 1100 and the second base plate 210. The OIS abutment member 910 includes at least three ball grooves 911 and OIS balls 912 respectively installed in the ball grooves 911. By abutting against the OIS balls 912 between the first mounting base 1100 and the second base plate 210, on the one hand, it can provide support for the movement of the first mounting base 1100 relative to the second mounting base 1200; on the other hand, it can reduce the frictional force when the two move relative to each other, so that relative movement can be achieved even when the OIS drive unit provides a relatively small driving force.

[0060] Reference Figures 2-3 In some embodiments, the second mounting base 1200 may further include a limiting plate 230 located on the opposite side of the second base plate 210 and fixed to the second upright plate 220. The limiting plate 230 may be parallel to or slightly angled to the second base plate 210. The limiting plate 230 and the first mounting base 1100 are spaced apart, and the gap between them is configured such that when the first mounting base 1100 abuts against the limiting plate 230, the OIS ball 912 cannot disengage from its corresponding ball groove 911. In use, when external force or other reasons cause the first mounting base 1100 to move relative to the second mounting base 1200 along the focusing direction, the limiting plate 230 can interfere with its movement in the focusing direction to prevent excessive movement that could cause the OIS ball 912 to fall out of the ball groove 911.

[0061] This disclosure does not limit the shape of the limiting plate 230. For example, in an embodiment of this disclosure, it can be constructed as an L-shaped plate, with the outer edge of the plate fixed to the second upright plate 220 and the inner edge extending to the side of the first mounting base 1100 opposite to the second mounting base 1200. Furthermore, in other embodiments, there can be three limiting plates 230, constructed as cubes and spaced apart, with one end fixed to the second upright plate 220 and the other end extending to the side of the first mounting base 1100 opposite to the second mounting base 1200.

[0062] Reference Figure 3 and Figure 10In some embodiments, in order to control the current in the OIS coil 320 and thus control the driving force of the OIS driving unit, the optical actuator may further include an FPC assembly. The FPC assembly includes a first FPC 1510 for electrical connection to the OIS driving unit and a second FPC 1520 for electrical connection to the AF driving unit. The first FPC 1510 includes a first straight plate segment 1511 and a second straight plate segment 1512 that are perpendicular to each other. The first straight plate segment 1511 and the second straight plate segment 1512 are respectively fixed on a second vertical plate 220, and the OIS coil 320 is fixed on the second vertical plate 220. The second FPC 1520 is plate-shaped and fixed on a third vertical plate 340.

[0063] Furthermore, in order to electrically connect the first FPC1510 to the relevant control components, refer to... Figure 3 and Figure 10 In some embodiments, the first FPC 1510 may further include a transmission arm segment 1513 connecting the second straight plate segment 1512. The end of the transmission arm segment 1513 away from the second straight plate segment 1512 may be constructed as a plate, wherein the plate-shaped end of the transmission arm segment 1513 and the second FPC 1520 are fixed on the same third vertical plate 340. Setting the transmission arm segment 1513 of the first FPC 1510 and the second FPC 1520 adjacent to each other can avoid problems such as complex wiring and potential safety hazards.

[0064] This disclosure does not limit the structure of the FPC assembly; for example, in some other embodiments, refer to Figures 8-9 The FPC assembly may also include a first FPC1510 configured as an L-shaped bent plate for electrical connection to the OIS drive unit, and a second FPC1520 configured as a straight plate for electrical connection to the AF drive unit, wherein the first FPC1510 and the second FPC1520 control the current in the OIS coil 320 and the AF coil, respectively. The first FPC1510 may include a first straight plate segment 1511 and a second straight plate segment 1512 that are perpendicular to each other. The first straight plate segment 1511 and the second straight plate segment 1512 are respectively fixed on the second vertical plate 220, and the OIS coil 320 is fixed on the second vertical plate 220. The second FPC1520 is fixed on the third vertical plate 340, and the second FPC1520 and the first FPC1510 are connected by a strip-shaped connecting arm 530. The connecting arm 530 is elastic or formed into a bent shape, so that when the second FPC1520 remains fixed, the first FPC1510 can move relative to the second FPC1520 in the focusing direction.

[0065] Furthermore, referring to Figure 8 Figure 9In the embodiments of this disclosure, in order to keep the second FPC1520 stationary, the first FPC1510 can move relative to the second FPC1520 along the focusing direction. The connecting arm 530, the first FPC1510, and the second FPC1520 can be integrally formed. The connecting arm 530 can include a straight section 531 and two bent sections 532 located at both ends of the straight section 531. The bent sections 532 are respectively connected to the first FPC1510 and the second FPC1520. Here, the straight section 531 is in the XY plane, and the bent sections 532 extend from the XY plane toward the Z direction. Connecting the straight section 531 to the first FPC1510 and the second FPC1520 by the bent sections 532 can make the FPC assembly as a whole structurally elastic, thereby satisfying the relative movement between the first FPC1510 and the second FPC1520. In addition, in some other embodiments, the elasticity can be made by the material of the connecting arm 530 itself, which is not limited in this disclosure.

[0066] With the above structure, when the actuator performs AF movement, the first mounting base 1100, the second mounting base 1200, and the OIS drive unit located on both move synchronously along the focusing direction. By connecting the OIS coil 320 with the connecting arm 530 instead of using ordinary wires, the problem of uncontrollable and messy wire harness deformation during the movement of the OIS coil 320 can be avoided.

[0067] To ensure the strength of the first FPC1510, refer to Figure 11 In some embodiments, the optical actuator may further include a reinforcing steel plate 1514 attached to the first straight plate segment 1511 and the second straight plate segment 1512. In this case, the aforementioned limiting plate 230 can be fixed to the reinforcing steel plate 1514. This disclosure does not limit the connection method between the reinforcing steel plate 1514 and the limiting plate 230; for example, it can be welding, bolting, or integral injection molding.

[0068] In order to detect the movement position of the first mounting base 1100 in real time and thus achieve closed-loop control, refer to Figures 1-4In some embodiments, the optical actuator may further include two OIS position sensors 600 respectively mounted on the first straight plate segment 1511 and the second straight plate segment 1512, with the OIS position sensors 600 centrally located inside the OIS coil 320. This disclosure does not limit the type or number of position sensors 80. For example, in embodiments of this disclosure, Hall effect sensors may be selected, and the number of position sensors 80 may be two to improve the accuracy of position detection. It should be noted that the overall length of the OIS coil 320 corresponds to the size of the first mounting base 1100, meaning the centerline of the first mounting base 1100 can pass through the center of the OIS coil 320. Therefore, the OIS position sensor 600 is centrally positioned so that it coincides with the center of the optical device driven by the OIS driving unit. This arrangement minimizes the impact of the rotational movement of the first mounting base 1100 on the OIS position sensor 600.

[0069] Reference Figure 1 , Figure 3 as well as Figure 7 In some embodiments, the plate-shaped ends of the second FPC 1520 and the transmission arm segment 1513 may protrude at least partially from the third base plate 330 in a direction away from the opening of the third mounting base 1300. The third mounting base 1300 may be formed with an elongated reinforcing structure 1301 away from the opening direction of the third mounting base 1300. The reinforcing structure 1301 fits against the protruding portion of the second FPC 1520, thereby protecting the protruding second FPC 1520 from bending due to various factors.

[0070] Reference Figures 1-4In some embodiments, an AF abutment member 920 may be provided between the second upright plate 220 and the third upright plate 340. The AF abutment member 920 includes two parallel first sliding shafts 921 extending along the driving direction of the AF driving unit and an AF ball 922 abutting between the two first sliding shafts 921. The two first sliding shafts 921 are fixed to the third upright plate 340 either in contact with each other or at intervals. One side of the AF ball 922 abuts against the two first sliding shafts 921, and the other side abuts directly or indirectly against the second upright plate 220. Indirect abutment can be achieved by the second sliding shaft 923, which will be described below, abutting against the second upright plate 220. When the two move relative to each other, the AF ball 922 moves accordingly, thereby changing relative sliding into rolling. The rolling motion can greatly reduce friction. Here, in the embodiments of this disclosure, the two first sliding shafts 921 may be fixed to the third upright plate 340. In addition, in some other embodiments, the two first sliding shafts 921 may be fixed to the second upright plate 220. Accordingly, in the second embodiment described above, the AF abutment member 920 can be arranged between the first mounting base 2100 and the second mounting base 2200. By forming a slide rail for the AF ball 922 with two parallel first slide shafts 921, it is possible to avoid the AF ball 922 impacting and causing dents in the slide rail, thus preventing performance defects. On the other hand, it can improve the surface precision of the slide rail, reduce motion friction, and improve product performance.

[0071] It should be noted that in this disclosure, the two first sliding shafts 921 can be fitted together or spaced apart according to actual needs, and the gap between them should be smaller than the diameter of the AF ball 922, so as to prevent the AF ball 922 from falling out between them.

[0072] Furthermore, referring to Figures 5-6 In some embodiments, the AF abutment member 920 may include a guide portion and a support portion. The AF ball bearing 922 of the support portion may abut between the first slide shaft 921 and the second vertical plate 220 to support the relative movement of the two. The guide portion may also include two parallel second slide shafts 923 extending along the driving direction of the AF drive unit. The second slide shafts 923 may be fixed on the second vertical plate 220 at positions corresponding to the first slide shafts 921. The AF ball bearing 922 of the guide portion may abut between the two first slide shafts 921 and the two second slide shafts 923 to ensure that the direction of the relative movement of the two does not deviate.

[0073] Reference Figures 1-3 In some embodiments, the number of AF balls 922 in the support portion can be at least one; the number of AF balls 922 in the guide portion can be multiple. (Refer to...) Figure 2In some embodiments, the number of support AF balls 922 can be one. During use, the second upright plate 220 can remain in close contact with multiple AF balls 922. The ball row formed by the multiple AF balls 922 can guide the relative movement of the second mounting base 1200 and the third mounting base 1300. The single AF ball 922 located on the opposite side of the multiple AF balls 922 can adapt to any draft angle of the component, providing support for the second upright plate 220. This design is well-suited for situations where the opposite surfaces of the second upright plate 220 and the third upright plate 340 are not parallel (due to the draft process), ensuring smooth and stable movement and thus guaranteeing product performance. In other words, when the opposite surfaces of the second upright plate 220 and the third upright plate 340 are not parallel, if both sides include multiple AF balls 922, and the gap between the two upright plates is larger than the diameter of the AF balls 922, the AF balls on one side may overlap, potentially causing jamming during movement.

[0074] It should be noted here that this disclosure does not limit the number or location of the support and guide parts, for example, referring to... Figure 1 In embodiments of this disclosure, the guide portion and the support portion may be disposed on opposite sides of the second mounting base 1200. Furthermore, in other embodiments, the guide portion and the support portion may also be disposed on the same side or adjacent sides of the second mounting base 1200.

[0075] Reference Figure 2 , Figures 6-7 In some embodiments, a through mounting hole 410 may be formed on the third upright plate 340 for sequentially mounting the AF ball bearing 922 and the first sliding shaft 921 laterally. The AF ball bearing 922 is at least partially located in the mounting hole 410, so that the two sets of opposing inner walls of the mounting hole 410 can respectively restrict the radial and axial movement of the AF ball bearing 922 along the first sliding shaft 921, thereby achieving a limiting effect. Furthermore, this design simplifies the limiting structure of the AF ball bearing 922, reduces manufacturing difficulty, and during installation, the lateral mounting process ensures that the AF ball bearing 922 and the first sliding shaft 921 are quickly installed into place.

[0076] The aforementioned "lateral sequential installation of AF ball bearings 922 and first sliding shaft 921" refers to the sequential installation of AF ball bearings 922 and first sliding shaft 921 into the mounting holes 410 from the side of the third vertical plate 340 with mounting holes 410 away from the second mounting base 1200, i.e., the AF ball bearings 922 abutting against the first sliding shaft 921 between the sidewall of the second vertical plate 220 and the sidewall of the second vertical plate 220. Here, the AF ball bearings 922 can directly abut against the sidewall of the second vertical plate 220 to provide support, or they can indirectly abut against the sidewall of the second vertical plate 220 through other components to provide guidance; this disclosure does not limit this.

[0077] Reference Figures 6-7 To facilitate the installation of the first sliding shaft 921 and to make reasonable use of the internal space of the third mounting base 1300, avoiding an excessively large optical actuator, in some embodiments, the side of the third upright plate 340 facing away from the second upright plate 220 can be recessed to form a mounting groove 420. The first sliding shaft 921 can abut against the stepped surface of the mounting groove 420 close to the second upright plate 220, and the mounting hole 410 is formed on the stepped surface. Furthermore, in other embodiments, the first sliding shaft 921 can be directly fixed to the outer side of the sidewall of the third upright plate 340.

[0078] To ensure the optical actuator can have a sealed structure, preventing dust, moisture, or other impurities from entering the actuator and affecting its performance, refer to... Figures 1-4 In some embodiments, the optical actuator may further include a slotted housing 1000 configured with one open end, the housing 1000 being fitted onto the third mounting base 1300 from one side of the opening to form a closed receiving space. To secure the housing 1000, in some embodiments, an injection hole 1001 may be provided on the housing 1000 at a position corresponding to the mounting slot 420. By injecting adhesive into the injection hole 1001, the first sliding shaft 921 and the housing 1000 can be bonded together as a whole. Furthermore, in other embodiments, the housing and the third mounting base 1300 may be detachably connected by bolts, which is not limited in this disclosure.

[0079] To further secure the housing 1000 and the third mounting bracket 1300, refer to Figures 2-3 In some embodiments, a notch may be provided on the side of the third mounting base 1300 that is opposite to the second mounting base 1200 and contacts the housing 1000. The housing 1000 may laterally close the notch to form a dispensing groove 1400. During installation, it is only necessary to inject glue into the dispensing groove 1400. The glue can further bond and fix the housing 1000 and the third mounting base 1300.

[0080] In order for the first mounting base 1100, which moves relative to the second mounting base 1200, to automatically reset after movement, refer to Figures 1-3 In embodiments of this disclosure, a reset assembly 800 may be provided between the first mounting base 1100 and the second mounting base 1200. The reset assembly 800 may include a first magnetic element fixed on the first mounting base 1100 and a second magnetic element fixed on the second base plate 210 and attracted to the first magnetic element. The first and second magnetic elements may be two independent magnets, a single magnet and a yoke 700, or a single magnet and an OIS magnet 310; this disclosure does not limit the specific configuration.

[0081] Reference Figures 1-3 To ensure symmetrical reset force applied to the first mounting base 1100 and prevent torsion due to uneven force, or to allow for timely adjustment and restoration of the original shape when the first mounting base 1100 twists relative to the second mounting base 1200, in some embodiments, each OIS drive unit may have two sets of reset components 800, symmetrically distributed on both sides of the center of the first mounting base 1100. With this design, when the first mounting base 1100 shifts or twists, the two reset components 800 can act simultaneously to reset the first mounting base 1100.

[0082] To enhance the strength of the first mounting base 1100, the second mounting base 1200, and the third mounting base 1300, in embodiments of this disclosure, a metal plate may be pre-embedded inside the first mounting base 1100, the second mounting base 1200, and the third mounting base 1300, i.e., the exterior may be made of plastic material, with the metal plate assumed to be within the plastic material. Furthermore, in some other embodiments, the first mounting base 1100, the second mounting base 1200, and the third mounting base 1300 may be entirely constructed of metal.

[0083] According to the second aspect of this disclosure, referring to Figure 13 A camera module is provided, which includes an optical device 1500 and the aforementioned optical actuator. The camera module has all the beneficial effects of the aforementioned optical actuator, which will not be elaborated here.

[0084] It should be noted that this disclosure does not specifically limit the optical device 1500. In some embodiments, the optical device 1500 may be a lens. Furthermore, in other embodiments, the optical device 1500 may be a photosensitive chip.

[0085] According to the third aspect of this disclosure, referring to Figure 14 An electronic device is provided that includes the aforementioned camera module, and the electronic device has all the beneficial effects of the aforementioned camera module, which will not be elaborated here.

[0086] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0087] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0088] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An optical actuator, characterized by, The optical actuator comprises a first mount, a second mount and a third mount, wherein the first mount is configured to mount an optical device, the first mount is configured to move in a shake compensation direction relative to the second mount, the second mount is configured to drive the first mount and move in a focus adjustment direction relative to the third mount, and the optical actuator further comprises: an OIS driving unit configured to drive the first mount to move; and an AF driving unit configured to drive the second mount to move, wherein the OIS driving unit comprises two OIS magnets and an OIS coil located between the two OIS magnets, one of the two OIS magnets and the OIS coil is mounted on the first mount, and the other is mounted on the second mount, the two OIS magnets and the OIS coil are arranged along a driving direction thereof, and wherein a ring surface of the OIS coil is perpendicular to the driving direction thereof, the two OIS magnets have opposite magnetic pole directions, and the magnetization directions thereof are the same as the driving direction thereof.

2. An optical actuator, characterized by, The optical actuator comprises a first mount, a second mount and a third mount, wherein the first mount is configured to mount an optical device, the first mount is configured to move in a focus adjustment direction relative to the second mount, the second mount is configured to drive the first mount and move in a shake compensation direction relative to the third mount, and the optical actuator further comprises: an OIS driving unit configured to drive the second mount to move; and an AF driving unit configured to drive the first mount to move, wherein the OIS driving unit comprises two OIS magnets and an OIS coil located between the two OIS magnets, one of the two OIS magnets and the OIS coil is mounted on the second mount, and the other is mounted on the third mount, the two OIS magnets and the OIS coil are arranged along a driving direction thereof, and wherein a ring surface of the OIS coil is perpendicular to the driving direction thereof, the two OIS magnets have opposite magnetic pole directions, and the magnetization directions thereof are the same as the driving direction thereof.

3. The optical actuator according to claim 1 or 2, characterized in that The OIS driving unit further comprises a magnetic yoke arranged outside the two OIS magnets and the OIS coil, the magnetic yoke is configured as a long cylinder structure with a rectangular cross section, and is sleeved on the outer periphery of the two OIS magnets and the OIS coil, or the magnetic yoke comprises two long strip plate segments, wherein the two long strip plate segments are symmetrically distributed on both sides of the OIS driving unit, and the arrangement direction of the two long strip plate segments is perpendicular to the driving direction of the OIS driving unit.

4. The optical actuator of claim 3, wherein, When the magnetic yoke is configured as a long cylinder structure, the magnetic yoke comprises a long strip semi-enclosing segment with a U-shaped cross section and a cover plate segment detachably buckled on the open end of the semi-enclosing segment, wherein the connection between the semi-enclosing segment and the cover plate segment is respectively configured as a matching zigzag shape, so that they can be detachably buckled.

5. The optical actuator of claim 1, wherein, The third mounting seat is configured to include a third bottom plate and a third vertical plate arranged circumferentially on the third bottom plate, and the second mounting seat is configured to include a second bottom plate and a second vertical plate arranged circumferentially on the second bottom plate, the second mounting seat is arranged in the accommodation space of the third mounting seat, and the first mounting seat is arranged in the accommodation space of the second mounting seat.

6. The optical actuator of claim 5, wherein, An OIS abutting member is arranged between the first mounting seat and the second bottom plate, the OIS abutting member includes at least three ball grooves and OIS balls respectively arranged in the ball grooves.

7. The optical actuator of claim 6, wherein, The second mounting seat further includes a limiting plate arranged on the opposite side of the second bottom plate and fixed on the second vertical plate, wherein the limiting plate is arranged in a spaced manner with the first mounting seat, and a gap between the limiting plate and the first mounting seat is configured such that the OIS balls cannot be separated from the ball grooves corresponding to the OIS balls when the first mounting seat abuts against the limiting plate.

8. The optical actuator of claim 5, wherein, The optical actuator further includes an FPC assembly, the FPC assembly includes a first FPC for electrically connecting to the OIS driving unit, and a second FPC for electrically connecting to the AF driving unit, The first FPC includes a first straight plate segment and a second straight plate segment perpendicular to each other, the first straight plate segment and the second straight plate segment are respectively fixed on the second vertical plate, and the OIS coil is fixed on the first FPC; the second FPC is configured in a plate shape and is fixed on the third vertical plate.

9. The optical actuator of claim 8, wherein, The first FPC further includes a transmission arm segment connecting the second straight plate segment, an end of the transmission arm segment away from the second straight plate segment is configured in a plate shape, wherein the plate-shaped end of the transmission arm segment and the second FPC are fixed on the same third vertical plate.

10. The optical actuator according to claim 8 or 9, characterized in that Further comprising a reinforcing steel plate attached to the first straight plate segment and the second straight plate segment, wherein an OIS abutting member is arranged between the first mounting seat and the second bottom plate, the OIS abutting member includes at least three ball grooves and OIS balls respectively arranged in the ball grooves, the second mounting seat further includes a limiting plate arranged on the opposite side of the second bottom plate and fixed on the second vertical plate, wherein the limiting plate is arranged in a spaced manner with the first mounting seat, and a gap between the limiting plate and the first mounting seat is configured such that the OIS balls cannot be separated from the ball grooves corresponding to the OIS balls when the first mounting seat abuts against the limiting plate, and wherein the limiting plate is fixed on the reinforcing steel plate.

11. The optical actuator of claim 8, wherein, The optical actuator further includes two OIS position sensors respectively arranged on the first straight plate segment and the second straight plate segment, the OIS position sensors are arranged centrally on the inner side of the OIS coil.

12. The optical actuator of claim 9, wherein, The second FPC and the plate-shaped end of the transmission arm segment at least partially protrude from the third bottom plate, the third mounting seat is formed with a long strip-shaped reinforcing structure facing away from the opening direction of the third mounting seat, wherein the reinforcing structure is attached to the protruding part of the second FPC.

13. The optical actuator of claim 5, wherein, An AF abutting member is arranged between the second upright plate and the third upright plate, and includes two first slide shafts parallel to each other and extending along the driving direction of the AF driving unit, and an AF ball abutting between the two first slide shafts, wherein The two first slide shafts are attached to or fixedly spaced on the third upright plate; and The AF ball is abutted on the two first slide shafts on one side, and is directly or indirectly abutted on the second upright plate on the other side.

14. The optical actuator of claim 13, wherein, The AF abutting member includes a guiding portion and a supporting portion, wherein The AF ball of the supporting portion is abutted between the first slide shaft and the second upright plate; The guiding portion further includes two second slide shafts parallel to each other and extending along the driving direction of the AF driving unit, the second slide shafts are fixed on the second upright plate at positions corresponding to the first slide shafts, and the AF ball of the guiding portion is abutted between the two first slide shafts and the two second slide shafts.

15. The optical actuator of claim 14, wherein, The number of AF balls of the supporting portion is at least one, and the number of AF balls of the guiding portion is multiple.

16. The optical actuator of claim 13, wherein, A through mounting hole is formed on the third upright plate for sequentially mounting the AF ball and the first slide shaft in the lateral direction, the AF ball is at least partially located in the mounting hole, so that two sets of opposite inner walls of the mounting hole can limit the AF ball from moving in the radial direction and the axial direction of the first slide shaft, respectively.

17. The optical actuator of claim 16, wherein, The side of the third upright plate away from the second upright plate is concave to form a mounting groove, the first slide shaft is abutted on a step surface of the mounting groove close to the second upright plate, and the mounting hole is formed on the step surface.

18. The optical actuator of claim 17, wherein, The optical actuator further includes a groove-shaped housing configured as one end open, the housing is sleeved on the third mounting seat from the open side of the third mounting seat, and a glue injection hole is formed in the position of the housing corresponding to the mounting groove.

19. The optical actuator of claim 5, wherein, A reset assembly is arranged between the first mounting seat and the second mounting seat, and includes a first magnetic member fixed on the first mounting seat, and a second magnetic member fixed on the second bottom plate and magnetically attracted to the first magnetic member.

20. The optical actuator of claim 19, wherein, Each set of OIS driving units corresponds to two sets of reset assemblies, and the two sets of reset assemblies are symmetrically distributed on both sides of the center of the first mounting seat.

21. The optical actuator of claim 1 or 2, wherein, The first mounting seat, the second mounting seat, and the third mounting seat are internally embedded with metal plates.

22. An image capture module comprising: An optical device and the optical actuator of any one of claims 1-21.

23. An electronic device, comprising: The camera module of claim 22.

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