CN115327733A - Optical actuator, camera module and electronic equipment - Google Patents

Abstract

The present disclosure relates to an optical actuator, camera module and electronic equipment, optical actuator includes first mount pad, second mount pad and third mount pad, and first mount pad is used for installing optical device, and first mount pad is configured to for the second mount pad at shake compensation direction motion, and the second mount pad is configured to drive first mount pad and for the third mount pad at the direction of focus motion, and optical actuator still includes: the OIS driving unit comprises two OIS magnets and an OIS coil positioned between the two OIS magnets, the two OIS magnets and the OIS coil are arranged along the driving direction of the OIS driving unit, the annular surface of the OIS coil is perpendicular to the driving direction of the OIS coil, the magnetic pole directions of the two OIS magnets are opposite, and the magnetizing directions of the two OIS magnets are the same as the driving direction of the OIS coil. The two OIS magnets act together with the OIS coil, thereby increasing the driving force of the OIS driving unit.

Description

Optical actuator, camera module and electronic equipment

Technical Field

The present disclosure relates to the field of electronic imaging, and in particular, to an optical actuator, an imaging module, and an electronic apparatus.

Background

In the field of electronic device imaging, in order to improve imaging quality, an optical component in an imaging module is generally movable, for example, focusing, zooming or optical anti-shake is performed, in order to achieve optical anti-shake characteristics, a common driving motor includes a coil and a magnet that are matched with each other, the arrangement direction of the coil and the magnet is generally perpendicular to a shake direction, in order to improve driving force, the arrangement direction of the coil and the magnet is changed to be the same as the shake direction in related technologies, for example, chinese patent application No. CN202121355552.6 discloses an optical device driving mechanism including a magnet and a coil that are matched with each other, the arrangement direction of the coil is the same as the shake direction at this time, but in practice, it is found that the situation that the driving force is insufficient in this arrangement mode.

Disclosure of Invention

An object of the present disclosure is to provide an optical actuator, an image pickup module, and an electronic apparatus that have at least partially solved the problems in the related art.

In order to achieve the above object, the present disclosure provides an optical actuator, including a first mounting seat, a second mounting seat and a third mounting seat, wherein the first mounting seat is used for mounting an optical device, the first mounting seat is configured to move in a shake compensation direction relative to the second mounting seat, the second mounting seat is configured to carry the first mounting seat and move in a focusing direction relative to the third mounting seat, the optical actuator further includes: the OIS driving unit is used for driving the first mounting seat to move; and the OIS driving unit is used for driving the second mounting seat to move, the OIS driving unit comprises two OIS magnets and an OIS coil positioned between the two OIS magnets, one of the two OIS magnets and the OIS coil is arranged on the first mounting seat, the other one of the two OIS magnets and the OIS coil is arranged on the second mounting seat, and the two OIS magnets and the OIS coil are arranged along the driving direction of the two OIS magnets and the driving direction of the two OIS coils, the annular surface of the OIS coil is perpendicular to the driving direction of the OIS coil, the magnetic pole directions of the two OIS magnets are opposite, and the magnetizing directions are the same as the driving direction of the two OIS magnets.

Accordingly, the present disclosure provides an optical actuator comprising a first mount, a second mount and a third mount, wherein the first mount is used for mounting an optical device, the first mount is configured to move in a focusing direction relative to the second mount, the second mount is configured to carry the first mount and move in a shake compensation direction relative to the third mount, the optical actuator further comprising: the OIS driving unit is used for driving the second mounting seat to move; and the OIS driving unit is used for driving the first mounting seat to move, the OIS driving unit comprises two OIS magnets and an OIS coil positioned between the two OIS magnets, one of the two OIS magnets and the OIS coil is arranged on the second mounting seat, the other one of the two OIS magnets and the OIS coil is arranged on the third mounting seat, and the two OIS magnets and the OIS coil are arranged along the driving direction of the two OIS magnets and the driving direction of the three OIS coils, and the annular surface of the OIS coil is perpendicular to the driving direction of the two OIS coils, the magnetic pole directions of the two OIS magnets are opposite, and the magnetizing directions are the same as the driving direction of the two OIS magnets.

Optionally, the OIS drive unit further includes a magnetic yoke disposed at the peripheries of the two OIS magnets and the OIS coil, the magnetic yoke is configured as a long tube structure with a rectangular cross section and is sleeved at the peripheries of the two OIS magnets and the OIS coil, or the magnetic yoke includes two long strip plate sections, the two long strip plate sections are symmetrically distributed at two sides of the OIS drive unit, and the arrangement direction of the two long strip plate sections is perpendicular to the drive direction of the OIS drive unit.

Optionally, when the magnetic yoke is configured as a long cylinder structure, the magnetic yoke comprises a long half-surrounding section with a U-shaped cross section and a cover plate section detachably fastened at an opening end of the half-surrounding section, wherein the joint of the half-surrounding section and the cover plate section is respectively configured as matched saw teeth so that the half-surrounding section and the cover plate section can be detachably fastened.

Optionally, the third mounting seat is configured to include a third bottom plate and a third vertical plate disposed in a circumferential direction of the third bottom plate, the second mounting seat is configured to include a second bottom plate and a second vertical plate disposed in a circumferential direction of the second bottom plate, the second mounting seat is disposed in an accommodating space of the third mounting seat, and the first mounting seat is disposed in an accommodating space of the second mounting seat.

Optionally, an OIS abutment member is disposed between the first mount and the second base plate, and the OIS abutment member includes at least three ball grooves and OIS balls respectively mounted in the ball grooves.

Optionally, the second mounting seat further includes a limiting plate located at an opposite side of the second bottom plate and fixed on the second vertical plate, wherein the limiting plate is spaced apart from the first mounting seat, and a gap between the limiting plate and the first mounting seat is configured such that the OIS ball cannot be disengaged from the ball groove corresponding to the limiting plate when the first mounting seat abuts against the limiting plate.

Optionally, the optical actuator further comprises an FPC assembly including a first FPC for electrically connecting to the OIS driver unit, and a second FPC for electrically connecting to the AF driver unit, wherein the first FPC includes a first straight section and a second straight section perpendicular to each other, the first straight section and the second straight section 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 fixed on the third vertical plate.

Optionally, the first FPC further includes a transmission arm section connected to the second straight section, an end of the transmission arm section far from the second straight section is configured to be plate-shaped, and the plate-shaped end of the transmission arm section and the second FPC are fixed to the same third vertical plate.

Optionally, the first straight plate section and the second straight plate section further include a reinforcing steel plate attached to the first straight plate section and the second straight plate section, wherein an OIS abutting member is disposed between the first mounting seat and the second bottom plate, the OIS abutting member includes at least three ball grooves and OIS balls respectively mounted in the ball grooves, the second mounting seat further includes a limiting plate located on an opposite side of the second bottom plate and fixed on the second straight plate, wherein the limiting plate is spaced apart from the first mounting seat and a gap therebetween is configured such that when the first mounting seat abuts against the limiting plate, the OIS ball cannot be separated from the corresponding ball groove, and wherein the limiting plate is fixed on the reinforcing steel plate.

Optionally, the optical actuator further comprises two OIS position sensors mounted on the first and second straight segments, respectively, the OIS position sensors being centrally located inside the OIS coil.

Optionally, the plate-shaped end portions of the second FPC and the transfer arm section at least partially protrude from the third base plate, and the third mounting seat is formed with an elongated reinforcing structure that deviates from the opening direction of the third mounting seat, wherein the reinforcing structure is attached to the protruding portion of the second FPC.

Optionally, an AF abutting member is arranged between the second vertical plate and the third vertical plate, and the AF abutting member includes two first sliding shafts which are parallel and extend along the driving direction of the AF driving unit, and an AF ball which abuts between the two first sliding shafts, where the two first sliding shafts are attached to each other or fixed on the third vertical plate at intervals; one side of the AF ball is abutted against the two first sliding shafts, and the other side of the AF ball is directly or indirectly abutted against the second vertical plate.

Optionally, the AF abutment member includes a guide portion and a support portion, wherein an AF ball of the support portion abuts between the first sliding shaft and the second vertical plate; the guide part further comprises two second sliding shafts which are parallel to each other and extend along the driving direction of the AF driving unit, the second sliding shafts are fixed on the second vertical plate at positions corresponding to the first sliding shafts, and AF balls of the guide part abut against between the two first sliding shafts and the two second sliding shafts.

Optionally, the number of AF balls of the support portion is at least one; the guide portion has a plurality of AF balls.

Optionally, a through mounting hole is formed in the third vertical plate for mounting the AF ball and the first sliding shaft in sequence along the lateral direction, and 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 radial and axial movement of the AF ball along the first sliding shaft respectively.

Optionally, a side surface, away from the second vertical plate, of the third vertical plate is recessed inwards to form a mounting groove, the first sliding shaft abuts against a step surface, close to the second vertical plate, of the mounting groove, and the mounting hole is formed in the step surface.

Optionally, the optical actuator further includes a groove-shaped housing with an opening at one end, the housing is sleeved on the third mounting seat from one side of the opening of the third mounting seat, and a glue injection hole is formed in a position of the housing corresponding to the mounting groove.

Optionally, a reset assembly is arranged between the first mounting seat and the second mounting seat, and the reset assembly includes a first magnetic member fixed on the first mounting seat, and a second magnetic member fixed on the second bottom plate and attracted to the first magnetic member.

Optionally, each set of OIS driving units corresponds to two sets of reset assemblies, and the two sets of reset assemblies are symmetrically distributed on two sides of the center of the first mounting seat.

Optionally, metal plates are pre-buried in the first mounting seat, the second mounting seat and the third mounting seat.

According to a second aspect of the present disclosure, there is provided a camera module comprising an optical device and the above optical actuator.

According to a third aspect of the present disclosure, an electronic device is provided, which includes the camera module.

Through the technical scheme, the two OIS magnets with opposite magnetic poles are arranged on the two sides of the annular surface of the OIS coil respectively, when the OIS coil is electrified, the OIS coil can generate a corresponding magnetic field due to the magnetoelectric effect, and the two OIS magnets can generate magnetic force in the same direction with the OIS coil respectively, so that the driving force of the OIS driving unit is improved.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is an exploded view of a first optical actuator according to the present disclosure;

FIG. 2 is an exploded view of an angle of a second optical actuator according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of another angle of a second optical actuator according to the exemplary illustration of the present disclosure;

FIG. 4 is an exploded view of a third optical actuator according to the present disclosure;

FIG. 5 is a top down cross-sectional view of a second optical actuator according to the present disclosure;

fig. 6 is a partially enlarged view of a portion a in fig. 5;

FIG. 7 is a schematic view of a third mount of a second optical actuator according to an exemplary illustration of the present disclosure;

FIG. 8 is a schematic view of an angle of an FPC assembly of a second optical actuator according to the present disclosure;

FIG. 9 is a schematic view of another angle of the FPC assembly of a second optical actuator, according to an illustrative embodiment of the present disclosure;

FIG. 10 is a schematic view of an FPC assembly of a first optical actuator, shown exemplary in accordance with the present disclosure;

fig. 11 is a schematic diagram of a first FPC for a first type of optical actuator, shown exemplary in accordance with the present disclosure;

FIG. 12 is a schematic view of a drive unit according to the present disclosure;

FIG. 13 is a schematic view of a camera module according to an exemplary illustration of the present disclosure;

fig. 14 is a schematic diagram of an electronic device illustratively shown in accordance with the present disclosure.

Description of the reference numerals

1100. 2100-a first mount; 1200. 2200-a second mount; 1300. 2300-a third mount; 1510. 2510-a first FPC; 1511. 2511-a first straight section; 1512. 2512-a second straight plate section; 1513-transfer arm segment; 1514-reinforcing steel plate; 1520. 2520-a second FPC; 210-a second backplane; 220-a second riser; 230-a limiting plate; 310-OIS Magnetitum; a 320-OIS coil; 330-a third backplane; 340-a third riser; 410-mounting holes; 420-mounting grooves; 530-a connecting arm; 531-straight section; 532-bending section; 600-OIS position sensors; 700-a magnetic yoke; 710-a semi-enclosed section; 720-cover plate section; 730-long strip plate section; 800-a reset component; 910-OIS abutment member; 911-ball groove; 912-OIS balls; 920-AF abutment member; 921 — a first sliding shaft; 922-AF rolling balls; 923-a second slide shaft; 1000-shell; 1001-glue injection hole; 1301-a reinforcing structure; 1400-glue dispensing groove; 1500-optical device.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "inner and outer" is defined based on the actual use of the corresponding parts, for example: the fact that the yoke is sleeved on the outer peripheries of the two OIS magnets and the OIS coil means that the two OIS magnets and the OIS coil are arranged in the accommodating space of the cylindrical yoke. The centered placement of the OIS position sensor on the "inside" of the OIS coil means that the OIS position sensor is located within the area enclosed by the OIS coil.

In addition, in the present disclosure, the terms "first", "second", and the like are used to distinguish one element from another, without order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 3, the present disclosure provides an optical actuator including a first mount 1100, a second mount 1200, and a third mount 1300, wherein the first mount 1100 is used to mount an optical device, the first mount 1100 is configured to move in a shake compensation direction with respect to the second mount 1200, the second mount 1200 is configured to bring the first mount 1100 and move in a focus direction with respect to the third mount 1300, the optical actuator further includes: an OIS driving unit for driving the first mount 1100 to move; and an AF driving unit for driving the second mount 1200 to move, wherein the OIS driving unit includes two OIS magnets 310 and an OIS coil 320 between the two OIS magnets 310, one of the two OIS magnets 310 and the OIS coil 320 is mounted on the first mount 1100, the other is mounted on the second mount 1200, and three of the two OIS magnets 310 and the OIS coil 320 are arranged along a driving direction thereof, and wherein an annular surface of the OIS coil 320 is perpendicular to the driving direction thereof, magnetic pole directions of the two OIS magnets 310 are opposite, and magnetizing directions are the same as the driving direction thereof.

Here, it should be explained that the plane of the shake compensation direction mentioned above refers to the plane of the X direction and the Y direction in fig. 2, which is perpendicular to the focusing direction, i.e., the Z direction mentioned below, and in the present embodiment, the first mount 1100 is configured to perform the anti-shake movement in the X direction or/and the Y direction with respect to the second mount 1200; the focusing direction is the Z direction in fig. 2, that is, the second mounting base 1200 is configured to drive the first mounting base 110 and perform focusing movement along the Z direction relative to the third mounting base 1300. Wherein, the X direction, the Y direction and the Z direction are vertical to each other. The annular surface of the OIS coil 320 is a cross section of a ring surrounded by a plurality of turns of the conductive wire, and the annular surface is perpendicular to the jitter compensation direction, so that the magnetic pole direction generated according to ampere's rule after the OIS coil is electrified 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 arranged opposite to each other in the shake compensation direction.

By using the above technical scheme, two OIS magnets 310 with opposite magnetic poles are respectively arranged on two sides of the annular surface of the OIS coil 320, when the OIS coil 320 is energized, the OIS coil 320 can generate a corresponding magnetic field due to the magnetoelectric effect, and the two OIS magnets 310 can respectively generate magnetic forces in the same direction as that of the OIS coil 320, so that the driving force of the OIS driving unit is improved. 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 provided, the distance between the OIS magnet 310 and the OIS coil 320 can only be gradually increased or decreased, and the magnitude of the magnetic force between the OIS magnet 310 and the OIS coil 320 is positively correlated with the distance, which results in insufficient driving force when the distance is long. According to the technical scheme of the present disclosure, when the OIS coil 320 is far from one OIS magnet 310, it may approach another OIS magnet 310 at the same time, so that the OIS driving unit always has a strong driving force regardless of the positional relationship between the OIS magnet 310 and the OIS coil 320.

The above-described embodiments are related parts that drive OIS by the AF drive unit to move in the focus direction, and accordingly, the present disclosure also provides a related part that drives AF by the OIS drive unit to move in the anti-shake compensation direction (second embodiment), specifically:

referring to fig. 4, in this embodiment, there is provided an optical actuator including a first mount 2100, a second mount 2200 and a third mount 2300, wherein the first mount 2100 is used for mounting an optical device, the first mount 2100 is configured to move in a focus direction with respect to the second mount 2200, the second mount 2200 is configured to bring the first mount 2100 and move in a shake compensation direction with respect to the third mount 2300, and the optical actuator further includes: an OIS driving unit for driving the second mount 2200 to move; and an AF driving unit for driving the first mount 2100 to move, wherein the OIS driving unit includes two OIS magnets 310 and an OIS coil 320 between the two OIS magnets 310, one of the two OIS magnets 310 and the OIS coil 320 is mounted on the second mount 2200, the other is mounted on the third mount 2300, and three of the two OIS magnets 310 and the OIS coil 320 are arranged along a driving direction thereof, and wherein an annular surface of the OIS coil 320 is perpendicular to the driving direction thereof, magnetic pole directions of the two OIS magnets 310 are opposite, and a magnetizing direction is the same as the driving direction thereof. Like the first embodiment described above, in this embodiment, the shake compensation direction movement is movement in the X direction and the Y direction in fig. 4; the focusing direction movement is the movement in the Z direction in fig. 4, and the optical actuator of the second embodiment has all the advantages of the optical actuator of the first embodiment, which will not be described herein again.

In order to further improve the utilization rate of the magnetic field of the OIS magnet 310 and thus increase the driving force of the OIS driving unit, referring to fig. 1 to 4, in an embodiment of the present disclosure, the OIS driving unit may further include a yoke 700 disposed at the outer peripheries of the two OIS magnets 310 and the OIS coil 320, and the yoke 700 may be configured as a long cylindrical structure having a rectangular cross section and sleeved at the outer peripheries of the two OIS magnets 310 and the OIS coil 320. When the yokes 700 are arranged on the outer circumference of the OIS magnet 310, the magnetic induction lines of the magnetic field are more compact and dense, the magnetic field utilization rate is higher, and the driving force of the OIS driving unit is larger. 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 increasing the magnetic field strength of the OIS magnet 310, which is not limited in this disclosure.

The present disclosure also does not limit the shape and size of the yoke 700, and in addition to the above-described long cylindrical shape having a rectangular cross section, in some other embodiments, the yoke 700 may be configured as a long half-enclosure structure having a U-shaped cross section, and the OIS magnet 310 and the OIS coil 320 may be placed in a receiving space formed by the half-enclosure structure. Alternatively, referring to fig. 12, in some other embodiments, the yoke 700 may include two elongated plate segments 730, wherein the two elongated plate segments 730 may be symmetrically distributed on two sides of the OIS driving unit, 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 a space between the two elongated plate segments 730.

Further, in order to facilitate the mounting of the OIS magnet 310 and the OIS coil 320 in the long cylindrical yoke 700, referring to fig. 1 to 4, the yoke 700 may include an elongated semi-surrounding section 710 having a U-shaped cross section and a cover section 720 detachably fastened to an open end of the semi-surrounding section 710, wherein a joint of the semi-surrounding section 710 and the cover section 720 may be respectively configured in a matching zigzag shape so as to be detachably fastened. The section of the sawtooth can be rectangular or trapezoidal to form a dovetail groove, so that the sawtooth is convenient to assemble. When the rectangular semi-surrounding section is installed, the OIS magnet 310 and the OIS coil 320 are installed in the accommodating space of the rectangular semi-surrounding section 710 with the U-shaped cross section, and then the cover plate section 720 is buckled on the opening side of the rectangular semi-surrounding section. In addition, in other embodiments, the cover plate section 720 and the elongated semi-surrounding section 710 may be connected by bonding.

Referring to fig. 1 to 4, in some embodiments, third mount 1300 may be configured to include third bottom plate 330 and third riser 340 disposed at a circumference of third bottom plate 330, second mount 1200 may be configured to include second bottom plate 210 and second riser 220 disposed at a circumference of second bottom plate 210, second mount 1200 may be disposed in a receiving space of third mount 1300, and first mount 1100 may be disposed in a receiving space of second mount 1200. Here, it should be explained that second mount 1200 and third mount 1300 are not absolutely standard slot-like structures with one open end, and further, neither second riser 220 nor third riser 340 are necessarily closed structures with an end-to-end joint, and may include a plurality of risers spaced apart and arranged around a corresponding base plate, and the present disclosure is not limited to the number and configuration of risers, and includes a plate-like structure all around the periphery of the base plate.

The assembly of the vertical plate and the bottom plate is not limited in the present disclosure, for example, in some embodiments, the vertical plate and the bottom plate may be integrally formed. In addition, in other embodiments, the vertical plate can be adhered to the bottom plate.

Referring to fig. 1 to 6, in some embodiments, an OIS abutment member 910 may be disposed between the first mount 1100 and the second base plate 210, the OIS abutment member 910 including at least three ball grooves 911 and OIS balls 912 mounted in the ball grooves 911, respectively. By abutting against the OIS ball 912 between the first mount 1100 and the second base plate 210, on the one hand, a supporting effect can be provided for the movement of the first mount 1100 relative to the second mount 1200; on the other hand, the friction force during the relative movement of the two may be reduced, so that the relative movement may be achieved also when the OIS drive unit provides a relatively small drive force.

Referring to fig. 2-3, in some embodiments, the second mount 1200 may further include a limiting plate 230 located at an opposite side of the second bottom plate 210 and fixed on the second vertical plate 220, and the limiting plate 230 may be parallel to or slightly angled with respect to the second bottom plate 210. Wherein the position limiting plate 230 is spaced apart from the first mount 1100, and the gap between the two is configured such that when the first mount 1100 abuts the position limiting plate 230, the OIS ball 912 cannot disengage from its corresponding ball groove 911. When the first mounting seat 1100 moves in the focusing direction relative to the second mounting seat 1200 due to an external force or other reasons, the limiting plate 230 may interfere with the movement in the focusing direction, so as to prevent the OIS ball 912 from falling off from the ball groove 911 due to an excessive movement stroke.

The shape of the limiting plate 230 is not limited by the present disclosure, for example, in the embodiment of the present disclosure, it may be configured as an L-shaped plate, where the outer edge of the plate is fixed on the second vertical plate 220 and the inner edge extends to the side of the first mounting seat 1100 facing away from the second mounting seat 1200. In addition, in some other embodiments, the number of the limiting plates 230 may be three, and the limiting plates are configured in a square shape and are respectively arranged at intervals, and one end of each limiting plate is fixed on the second vertical plate 220, and the other end of each limiting plate extends to a side of the first mounting base 1100, which is away from the second mounting base 1200.

Referring to fig. 3 and 10, in some embodiments, in order to control the current in the OIS coil 320 and thus the driving force of the OIS driver unit, in some embodiments, the optical actuator may further include an FPC assembly including a first FPC1510 for electrically connecting to the OIS driver unit, and a second FPC1520 for electrically connecting to the AF driver unit, wherein the first FPC1510 includes a first straight section 1511 and a second straight section 1512 perpendicular to each other, the first straight section 1511 and the second straight section 1512 are respectively fixed on the second riser 220, and the OIS coil 320 is fixed on the second riser 220; the second FPC1520 is configured in a plate shape and fixed on the third upright plate 340.

Further, to electrically connect the first FPC1510 with the associated control components, referring to fig. 3 and 10, in some embodiments, the first FPC1510 may further include a transmission arm section 1513 connected to the second straight board section 1512, and an end of the transmission arm section 1513 remote from the second straight board section 1512 may be configured in a plate shape, wherein the plate-shaped end of the transmission arm section 1513 and the second FPC1520 are fixed on the same third vertical board 340. The transmission arm section 1513 of the first FPC1510 and the second FPC1520 are arranged to be adjacent to each other, so that problems of complicated wiring, potential safety hazards and the like can be avoided.

The present disclosure does not limit the structure of the FPC assembly, for example, in other embodiments, referring to fig. 8 to 9, the FPC assembly may further include a first FPC1510 configured in an L-shaped bent plate shape for electrical connection to the OIS driver unit, and a second FPC1520 configured in a straight plate shape for electrical connection to the AF driver unit, the first FPC1510 and the second FPC1520 controlling the current in the OIS coil 320 and the AF coil, respectively. The first FPC1510 may include a first straight section 1511 and a second straight section 1512 that are perpendicular to each other, the first straight section 1511 and the second straight section 1512 are respectively fixed on the second vertical board 220, and the OIS coil 320 is fixed on the second vertical board 220; the second FPC1520 is fixed on the third riser 340, and wherein the second FPC1520 and the first FPC1510 are connected by a connection arm 530 in a tape shape, the connection arm 530 has elasticity or is formed in a bent shape, so that the first FPC1510 can move in a focus direction with respect to the second FPC1520 while the second FPC1520 is kept fixed.

Further, referring to fig. 8 to 9, in an embodiment of the present disclosure, in order to keep the second FPC1520 stationary, the first FPC1510 may move in a focus direction with respect to the second FPC1520, the connection arm 530, the first FPC1510, and the second FPC1520 may be integrally formed, the connection arm 530 may include a straight section 531 and two bending sections 532 located at both ends of the straight section 531, and the bending sections 532 are respectively connected to the first FPC1510 and the second FPC 1520. Here, straight section 531 is in the X-Y plane from which bend section 532 extends toward the Z direction. The connection of the straight section 531 to the first and second FPCs 1510 and 1520 via the bent section 532 may provide structural flexibility to the FPC assembly as a whole, thereby accommodating the relative motion between the first and second FPCs 1510 and 1520. In addition, in some other embodiments, the connection arm 530 may be made of a material that is elastic, which is not limited in this disclosure.

With the above configuration, when the actuator performs the AF movement, the first mount 1100, the second mount 1200, and the OIS drive unit located thereon are moved in the focusing direction in synchronization. By connecting the OIS coil 320 through the connecting arm 530 without using a common wire, the problem of uncontrollable and disordered deformation of the wire harness during movement of the OIS coil 320 can be avoided.

To ensure the strength of the first FPC1510, referring to fig. 11, in some embodiments, the optical actuator may further include a reinforced steel plate 1514 attached to the first and second straight sections 1511, 1512. And in this case, the above-described limit plate 230 may be fixed to the reinforced steel plate 1514. The connection manner of the reinforced steel plate 1514 and the limit plate 230 in the present disclosure is not limited, for example: it may be welded, bolted or integrally injection molded.

In order to be able to detect the moving position of the first mount 1100 in real time to enable real-time adjustment for closed-loop control, referring to fig. 1-4, in some embodiments, the optical actuator may further include two OIS position sensors 600 mounted on the first straight plate segment 1511 and the second straight plate segment 1512, respectively, with the OIS position sensor 600 being centrally disposed inside the OIS coil 320. The present disclosure does not limit the type and number of the position sensors 80, for example, in the embodiment of the present disclosure, the position sensors may be selected as hall sensors, and the number of the 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 mount 1100, i.e., the center line of the first mount 1100 may pass through the center of the OIS coil 320, so that the OIS position sensor 600 is centrally located so that the OIS position sensor 600 may be centered with respect to the optics driven by the OIS drive unit, which may minimize the effect of the rotational movement of the first mount 1100 on the OIS position sensor 600.

Referring to fig. 1, 3 and 7, in some embodiments, the plate-shaped end portions of the second FPC1520 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 seat 1300, and the third mounting seat 1300 may be formed with an elongated reinforcing structure 1301 in a direction away from the opening of the third mounting seat 1300, wherein the reinforcing structure 1301 is attached to the protruding portion of the second FPC1520, so as to protect the protruding second FPC1520 from being bent due to various factors.

Referring to fig. 1 to 4, in some embodiments, an AF abutment member 920 may be disposed between the second riser 220 and the third riser 340, where the AF abutment member 920 includes two first sliding shafts 921 extending in parallel and along the driving direction of the AF driving unit, and an AF ball 922 abutting between the two first sliding shafts 921, where the two first sliding shafts 921 are attached to or fixed on the third riser 340 at intervals, and the AF ball 922 abuts against the two first sliding shafts 921 on one side and directly or indirectly against the second riser 220 on the other side, where indirectly may be the second sliding shaft 923 to be described later. When the two move relatively, the AF ball 922 follows, so that the relative sliding can be changed into rolling, and the rolling movement mode can greatly reduce the friction force. Here, in the embodiment of the present disclosure, the two first sliding shafts 921 may be fixed on the third vertical plate 340. In addition, in some other embodiments, two first sliding shafts 921 may be fixed on the second vertical plate 220. Accordingly, in the second embodiment described above, the AF abutment member 920 may then be disposed between the first mount 2100 and the second mount 2200. The sliding rail of AF ball 922 is formed by two first sliding shafts 921 which are parallel to each other, so that the problem of poor performance caused by the fact that a sliding rail pit is formed by impact of the AF ball 922 can be avoided, the surface precision of the sliding rail can be improved, the moving friction force is small, and the product performance is improved.

It should be noted that, in the present disclosure, the two first sliding shafts 921 may be attached to or spaced from each other according to actual requirements, and a gap between the two first sliding shafts is smaller than a diameter of the AF ball 922, so as to avoid the AF ball 922 from falling off from the AF ball 922.

Further, referring to fig. 5-6, in some embodiments, the AF abutment member 920 may include a guide portion and a support portion, wherein the AF ball 922 of the support portion may abut between the first slide shaft 921 and the second vertical plate 220 to support the relative movement therebetween; the guide portion may further include two second sliding shafts 923 parallel to each other and extending along a driving direction of the AF driving unit, the second sliding shafts 923 may be fixed at positions on the second vertical plate 220 corresponding to the first sliding shafts 921, and the AF balls 922 of the guide portion may abut against between the two first sliding shafts 921 and the two second sliding shafts 923, so that a direction of relative movement between the two first sliding shafts 921 and the two second sliding shafts 923 may be ensured, and no deviation occurs.

Referring to fig. 1-3, in some embodiments, the number of AF balls 922 of a support may be at least one; the number of AF balls 922 of the guide portion may be plural. Referring to fig. 2, in some embodiments, the number of the AF balls 922 of the support portion may be one, when in use, the second riser 220 may be kept close to the plurality of AF balls 922, a ball column formed by the plurality of AF balls 922 may provide guidance for the relative movement of the second mounting seat 1200 and the third mounting seat 1300, and the one AF ball 922 arranged at the opposite side of the plurality of AF balls 922 may be adapted to any drawing angle of the component part to provide support for the second riser 220. By the design, the die-drawing mechanism can be well suitable for the condition that the opposite surfaces of the second vertical plate 220 and the third vertical plate 340 are non-parallel surfaces (caused by a die-drawing process), and can ensure smooth and stable movement process, thereby ensuring the product performance. In other words, in the case that the facing surfaces of the second vertical plate 220 and the third vertical plate 340 are non-parallel surfaces, if the two opposite sides include a plurality of AF balls 922, when the gap between the two vertical plates is larger than the diameter of the AF balls 922, the AF balls on one side may be staggered and stacked left and right, and may be easily jammed during movement.

Here, it should be noted that the number and distribution positions of the supporting portions and the guiding portions are not limited in the present disclosure, for example, referring to fig. 1, in an embodiment of the present disclosure, the guiding portions and the supporting portions may be disposed at opposite sides of the second mounting seat 1200. In addition, in some other embodiments, the guiding portion and the supporting portion may be disposed on the same side or adjacent sides of the second mounting seat 1200.

Referring to fig. 2, 6-7, in some embodiments, a through-mounting hole 410 may be formed in the third vertical plate 340 for mounting an AF ball 922 and a first sliding shaft 921 in sequence along a lateral direction, where the AF ball 922 is at least partially located in the mounting hole 410, so that two sets of opposite inner walls of the mounting hole 410 may respectively limit radial and axial play of the AF ball 922 along the first sliding shaft 921, thereby achieving a limiting effect. And so design, can simplify AF ball 922's limit structure, reduce the technology degree of difficulty, in the installation, the installation technology of lateral direction can also ensure AF ball 922 and first slide axis 921 and install the target in place fast.

The above-mentioned "mounting the AF ball 922 and the first slide shaft 921 in sequence laterally" means that the AF ball 922 and the first slide shaft 921 are mounted in the mounting hole 410 in sequence from the side of the edge wall of the third upright plate 340, which is away from the second mounting base 1200, where the mounting hole 410 is provided, that is, the AF ball 922 abuts against between the edge walls of the first slide shaft 921 and the second upright plate 220. Here, the AF ball 922 may directly abut against the side wall of the second vertical plate 220 to form a supporting function, or may indirectly abut against the side wall of the second vertical plate 220 through other components to achieve a guiding function, which is not limited in the present disclosure.

Referring to fig. 6 to 7, in order to facilitate the installation of the first sliding shaft 921, and to reasonably utilize the inner space of the third installation base 1300, and to avoid the optical actuator from being too large in volume, in some embodiments, the side surface of the third vertical plate 340 away from the second vertical plate 220 may be recessed inwards to form the installation groove 420, the first sliding shaft 921 may abut against the step surface of the installation groove 420 close to the second vertical plate 220, and the installation hole 410 is opened on the step surface. In addition, in some other embodiments, the first sliding shaft 921 can be directly fixed on the outer side of the side wall of the third vertical plate 340.

In order to form a closed structure of the optical actuator, and prevent impurities such as dust or moisture from entering the interior of the optical actuator, thereby affecting the performance of the optical actuator, referring to fig. 1-4, in some embodiments, the optical actuator may further include a groove-shaped housing 1000 configured to be open at one end, and the housing 1000 may be sleeved on the third mounting seat 1300 from one side of the opening of the third mounting seat 1300 to form a closed accommodating space. In order to fix the casing 1000, in some embodiments, a glue injection hole 1001 may be formed in a position of the casing 1000 corresponding to the mounting groove 420, and the first sliding shaft 921 and the casing 1000 may be integrally bonded by injecting glue into the glue injection hole 1001. In addition, in some other embodiments, the housing and the third mounting seat 1300 may be detachably connected by bolts, which is not limited by the present disclosure.

In order to further fix the outer shell 1000 and the third mounting seat 1300, referring to fig. 2 to fig. 3, in some embodiments, a position of a side of the third mounting seat 1300 away from the second mounting seat 1200, which is in contact with the outer shell 1000, may be provided with a notch, the outer shell 1000 may laterally close the notch to form the dispensing slot 1400, during installation, only glue needs to be injected into the dispensing slot 1400, and the outer shell 1000 and the third mounting seat 1300 may be further bonded and fixed by the glue.

In order that the first mount 1100 moving relative to the second mount 1200 may be automatically reset after the movement, referring to fig. 1 to 3, in an embodiment of the present disclosure, a reset assembly 800 may be disposed between the first mount 1100 and the second mount 1200, and the reset assembly 800 may include a first magnetic member fixed to the first mount 1100 and a second magnetic member fixed to the second base plate 210 and attracted to the first magnetic member. The first magnetic member and the second magnetic member may be two magnets independent of each other, or may be one magnet and one yoke 700, or may be one magnet and the OIS magnet 310, which is not limited in this disclosure.

Referring to fig. 1 to 3, in order to make the restoring force applied to the first mounting base 1100 symmetrical and avoid the problem of torsion caused by uneven stress, or to adjust the first mounting base 1100 in time when it is twisted with respect to the second mounting base 1200 so as to restore it to its original state, in some embodiments, each set of OIS driving units may correspond to two sets of restoring assemblies 800, and the two sets of restoring assemblies 800 are symmetrically distributed on two sides of the center of the first mounting base 1100. So designed, when first mount 1100 is shifted or twisted, two reset assemblies 800 can act simultaneously to reset first mount 1100.

In order to enhance the strength of the first, second and third mounting seats 1100, 1200 and 1300, in the embodiment of the present disclosure, the first, second and third mounting seats 1100, 1200 and 1300 may be embedded with a metal plate inside, that is, the outside may be a plastic material, and the metal plate is assumed to be in the plastic material. Furthermore, in some other embodiments, the first mount 1100, the second mount 1200, and the third mount 1300 may all be made of metal.

According to a second aspect of the present disclosure, referring to fig. 13, a camera module is provided, which includes an optical device 1500 and the optical actuator, and the camera module has all the advantages of the optical actuator, which will not be described herein again.

It is noted that the present disclosure does not specifically limit the optical device 1500, and in some embodiments, the optical device 1500 may be a lens. Furthermore, in other embodiments, optical device 1500 may be a light sensing chip.

According to a third aspect of the present disclosure, referring to fig. 14, an electronic device is provided, which includes the above-mentioned camera module, and the electronic device has all the advantages of the above-mentioned camera module, which is not described herein again.

The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (23)

1. An optical actuator comprising a first mount configured to mount an optical device, a second mount configured to move relative to the second mount in a jitter compensation direction, and a third mount configured to carry the first mount and to move relative to the third mount in a focus direction, the optical actuator further comprising:

the OIS driving unit is used for driving the first mounting seat to move; and

an AF driving unit for driving the second mounting seat to move,

the OIS driving unit comprises two OIS magnets and an OIS coil positioned between the two OIS magnets, one of the two OIS magnets and the OIS coil is installed on the first installation seat, the other one of the two OIS magnets and the OIS coil is installed on the second installation seat, the two OIS magnets and the OIS coil are arranged along the driving direction of the OIS coil, the annular surface of the OIS coil is perpendicular to the driving direction of the OIS coil, the magnetic pole directions of the two OIS magnets are opposite, and the magnetizing directions are the same as the driving direction of the OIS coil.

2. An optical actuator comprising a first mount configured to mount an optical device, a second mount configured to move relative to the second mount in a focus direction, and a third mount configured to carry the first mount and to move relative to the third mount in a jitter compensation direction, the optical actuator further comprising:

the OIS driving unit is used for driving the second mounting seat to move; and

an AF driving unit for driving the first mounting seat to move,

the OIS driving unit comprises two OIS magnets and an OIS coil positioned between the two OIS magnets, one of the two OIS magnets and the OIS coil is installed on the second installation seat, the other one of the two OIS magnets and the OIS coil is installed on the third installation seat, the two OIS magnets and the OIS coil are arranged along the driving direction of the two OIS magnets and the driving direction of the three OIS coils, the annular surface of the OIS coil is perpendicular to the driving direction of the three OIS coils, the magnetic pole directions of the two OIS magnets are opposite, and the magnetizing directions are the same as the driving direction of the two OIS magnets.

3. The optical actuator according to claim 1 or 2, wherein the OIS drive unit further comprises a yoke arranged at outer peripheries of the two OIS magnets and the OIS coil, the yoke being configured as a long cylindrical structure having a rectangular cross section and fitted over outer peripheries of the two OIS magnets and the OIS coil, or,

the yoke includes two rectangular plate sections, wherein, two rectangular plate section symmetric distribution is in OIS drive unit's both sides, and two rectangular plate section arrange the direction perpendicular to OIS drive unit's drive direction.

4. An optical actuator according to claim 3, wherein the yoke comprises an elongated half surrounding section having a U-shaped cross section and a cover plate section detachably fastened to an open end of the half surrounding section when the yoke is configured as a long cylinder structure, wherein the joint of the half surrounding section and the cover plate section is respectively configured as a matched saw-tooth shape so as to be detachably fastened.

5. The optical actuator according to claim 1, wherein the third mount is configured to include a third bottom plate and a third riser disposed in a circumferential direction of the third bottom plate, the second mount is configured to include a second bottom plate and a second riser disposed in a circumferential direction of the second bottom plate, the second mount is disposed in the receiving space of the third mount, and the first mount is disposed in the receiving space of the second mount.

6. The optical actuator of claim 5, wherein an OIS abutment member is disposed between the first mount and the second base plate, the OIS abutment member comprising at least three ball grooves and OIS balls respectively mounted in the ball grooves.

7. The optical actuator of claim 6, wherein the second mount further comprises a limiting plate located on the opposite side of the second base plate and fixed on the second riser, wherein the limiting plate is spaced apart from the first mount and a gap therebetween is configured such that the OIS ball cannot disengage from the ball groove corresponding thereto when the first mount abuts the limiting plate.

8. The optical actuator of claim 5, further comprising an FPC assembly including a first FPC for electrical connection to the OIS drive unit, and a second FPC for electrical connection to the AF drive unit,

the first FPC comprises a first straight plate section and a second straight plate section which are perpendicular to each other, the first straight plate section and the second straight plate section 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 to the third vertical plate.

9. The optical actuator of claim 8, wherein the first FPC further comprises a transfer arm segment connected to the second straight segment, an end of the transfer arm segment distal from the second straight segment configured in a plate shape, wherein the plate-shaped end of the transfer arm segment and the second FPC are fixed on a same third riser.

10. The optical actuator according to claim 8 or 9, further comprising a reinforced steel plate attached to the first straight plate section and the second straight plate section, wherein an OIS abutting member is disposed between the first mounting seat and the second bottom plate, the OIS abutting member includes at least three ball grooves and OIS balls respectively mounted in the ball grooves, the second mounting seat further includes a limit plate located on an opposite side of the second bottom plate and fixed to the second vertical plate, wherein the limit plate is spaced apart from the first mounting seat with a gap configured such that the OIS ball cannot be disengaged from the corresponding ball groove when the first mounting seat abuts the limit plate, and wherein the limit plate is fixed to the reinforced steel plate.

11. The optical actuator of claim 8, further comprising two OIS position sensors mounted on the first and second straight segments, respectively, the OIS position sensors being centrally located inside the OIS coil.

12. An optical actuator according to claim 8, wherein the second FPC and the plate-like end portion of the transfer arm segment at least partially protrude from the third base plate, and the third mount is formed with an elongated reinforcing structure facing away from the opening direction of the third mount, wherein the reinforcing structure abuts the protruding portion of the second FPC.

13. An optical actuator according to claim 5, wherein an AF abutment member is provided between the second riser and the third riser, the AF abutment member including two first slide shafts extending in parallel and in a driving direction of the AF driving unit and an AF ball abutting between the two first slide shafts, wherein,

the two first sliding shafts are attached to each other or fixed on the third vertical plate at intervals; and

one side of the AF ball is abutted against the two first sliding shafts, and the other side of the AF ball is directly or indirectly abutted against the second vertical plate.

14. An optical actuator according to claim 13, wherein the AF abutment member includes a guide portion and a support portion, wherein,

the AF ball of the supporting part is abutted between the first sliding shaft and the second vertical plate;

the guide part further comprises two second sliding shafts which are parallel to each other and extend along the driving direction of the AF driving unit, the second sliding shafts are fixed on the second vertical plate at positions corresponding to the first sliding shafts, and AF balls of the guide part abut against between the two first sliding shafts and the two second sliding shafts.

15. An optical actuator according to claim 14, wherein the number of AF balls of the support portion is at least one; the guide portion has a plurality of AF balls.

16. An optical actuator as claimed in claim 13, wherein a mounting hole is formed through the third riser for mounting the AF ball and the first slide shaft in sequence in a lateral direction, the AF ball being at least partially located in the mounting hole such that two sets of opposing inner walls of the mounting hole can limit radial and axial play of the AF ball along the first slide shaft, respectively.

17. The optical actuator according to claim 16, wherein a side of the third vertical plate facing away from the second vertical plate is recessed to form a mounting groove, the first sliding shaft abuts against a step surface of the mounting groove adjacent to the second vertical plate, and the mounting hole is opened on the step surface.

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

19. An optical actuator according to claim 5, wherein a reset assembly is disposed between the first and second mounting bases, the reset assembly including a first magnetic member fixed to the first mounting base and a second magnetic member fixed to the second base plate and attracted to the first magnetic member.

20. An optical actuator according to claim 19, wherein each set of OIS drive units has two corresponding sets of reset assemblies symmetrically disposed on either side of the centre of the first mount.

21. The optical actuator according to claim 1 or 2, wherein a metal plate is embedded inside the first mount, the second mount, and the third mount.

22. A camera module comprising an optical device and an optical actuator according to any one of claims 1 to 21.

23. An electronic device comprising the camera module of claim 22.

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