CN219435118U - Optical actuator, camera module and electronic equipment - Google Patents

Abstract

The present disclosure relates to an optical actuator, a camera module, and an electronic apparatus, the optical actuator including: a carrier; a first base; a second base; a first rotating member supported between the carrier and the first base, the carrier being rotatably connected to the first base through the first rotating member; a second rotating member supported between the first base and the second base, the first base being rotatably connected to the second base through the second rotating member; a first driving part for driving the carrier to rotate relative to the first base; the second driving part is used for driving the first base to rotate compared with the second base; and the reset part is elastically connected between the carrier and the second base. By arranging the first rotating member and the second rotating member, a supporting structure with the carrier rotating along two directions compared with the second base can be formed, so that the movement is more stable, and the lens with larger weight can be suitable for a lens with larger weight. In addition, the reset portion may restore the drive carrier to the initial position after the actuator receives an external impact.

Description

Optical actuator, camera module and electronic equipment

Technical Field

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

Background

Along with the improvement of living standard of people, the requirements of people on functions of photographic equipment are increased, the requirements on photographic quality are higher, and in order to meet the extreme pursuit of consumers on images, the functions of focusing and anti-shake of the photographic equipment are generally required to be realized. For example, in order to introduce an optical zoom function, but to meet the ultra-thin design of a mobile phone, an optical path deflection system is introduced to be matched with a tele lens. For example, chinese patent No. 202010177641.X provides an optical element driving mechanism, which includes a carrier, a base, an electromagnetic generating device, and an elastic element, wherein the elastic element is connected between the carrier and the base, so as to rotate the carrier relative to the base under the action of electromagnetic induction. However, this way of using the elastic member as a virtual rotation axis is not stable enough to move, and there is a certain movement hidden trouble when the weight of the lens arranged on the carrier is large.

Disclosure of Invention

An object of the present disclosure is to provide an optical actuator, an image capturing module, and an electronic apparatus, which at least partially solve the problems in the related art.

To achieve the above object, the present disclosure provides an optical actuator including: a carrier for carrying the optical device; a first base for mounting the carrier; a second base for accommodating the first base; a first rotating member supported between the carrier and the first base, the carrier being rotatably connected to the first base through the first rotating member; a second rotating member supported between the first base and the second base, the first base being rotatably connected to the second base through the second rotating member; a first driving part for driving the carrier to rotate compared with the first base; the second driving part is used for driving the first base to drive the carrier to rotate compared with the second base; and a reset part elastically connected between the carrier and the second base to provide a reset force when the carrier moves relative to the second base.

Optionally, the first rotating member includes two support assemblies symmetrically arranged on both sides of the carrier, each of the support assemblies including an arc-shaped concave portion provided on one of the carrier and the first base, and an arc-shaped convex portion provided on the other of the carrier and the first base to be in shape-fit with the arc-shaped concave portion.

Optionally, each supporting component comprises a plate spring with two ends fixed on the carrier respectively and the middle part protruding out of the carrier, wherein the position, close to the middle, of the plate spring is concave inwards to form the arc-shaped concave part.

Optionally, a ball is disposed at a position of the first base corresponding to the arc-shaped concave portion, and the ball forms the arc-shaped convex portion.

Optionally, the second rotating member includes a rotating shaft fixed on the second base and a sleeve fixed on the first base, wherein the rotating shaft and the sleeve are sleeved through a bearing.

Optionally, the reset portion is a reed assembly, and the reed assembly includes two first reeds fixed on the second base respectively, a second reed located between the two first reeds and fixed on the carrier, and a reed wire connected between the first reed and the second reed.

Optionally, the spring wire extends in a wave shape and symmetrically surrounds the periphery of the second reed, so as to provide a restoring force when the carrier rotates around the first rotating member, and/or provide a restoring force when the first base drives the carrier to rotate around the second rotating member.

Optionally, the first driving part comprises a first driving magnet fixed on the carrier and a first driving coil fixed on the second base and matched with the first driving magnet, and the second driving part comprises a second driving magnet fixed on the first base and a second driving coil fixed on the second base and matched with the second driving magnet.

Optionally, the second driving part comprises two groups of second driving magnets and second driving coils which are mutually matched and symmetrically arranged at two sides of the first base.

According to a second aspect of the present disclosure, there is provided an image capturing module including an optical device and the optical actuator described above.

According to a third aspect of the present disclosure, an electronic device is provided, including the above-mentioned camera module.

Through the technical scheme, the first rotating member is arranged between the carrier and the first base, the second rotating member is arranged between the first base and the second base, and the moving support structure can be provided for the carrier when the carrier rotates along two different directions compared with the second base, so that the carrier is relatively stable in support when the carrier rotates compared with the second base, has certain support strength, and can be suitable for a lens with larger weight. In addition, the reset part is elastically connected between the carrier and the second base, so that when the optical actuator is impacted externally, the offset carrier can be restored to the initial position under the action of the reset part, and the normal operation of the actuator is ensured.

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

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

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

FIG. 2 is an exploded view of the optical actuator shown in FIG. 1 at a second angle;

FIG. 3 is a rear view of the optical actuator shown in FIG. 1;

FIG. 4 is a schematic view of a portion of the structure of the optical actuator shown in FIG. 1;

FIG. 5 is a schematic view of a carrier of the optical actuator shown in FIG. 1;

fig. 6 is a schematic view of a support assembly of the optical actuator shown in fig. 1.

Description of the reference numerals

100-carrier; 110-grooves; 120-convex columns; 130-avoiding holes; 200-a first base; 300-a second base; 400-a first rotating member; 410-a support assembly; 411-arcuate recess; 412-an arcuate protrusion; 413-leaf springs; 414-balls; 500-a second rotating member; 510-a rotation axis; 520-sleeve; 610-a first drive magnet; 620-a first drive coil; 710-a second drive magnet; 720-a second drive coil; 800-reed assembly; 810-a first reed; 820-a second reed; 830-spring wire; 900-optical device.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, terms of orientation such as "inner" and "outer" are used based on the orientation of the relevant components in use, for example: the "inward" concave formation of the arc-shaped recess at the position near the middle of the leaf spring means that the position near the middle of the leaf spring is recessed toward the carrier direction to form the arc-shaped recess.

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

Referring to fig. 1-2, according to a first aspect of the present disclosure, there is provided an optical actuator comprising: the optical device 900 includes a carrier 100 for carrying the optical device 900, a first base 200 for mounting the carrier 100, a second base 300 for accommodating the first base 200, a first rotating member 400 supported between the carrier 100 and the first base 200, a second rotating member 500 supported between the first base 200 and the second base 300, a first driving part, a second driving part, and a reset part. The optical device 900 may be a prism, or may be another suitable plane mirror, a convex lens, or the like, and the three-dimensional prism is taken as an example in the drawings of the embodiments of the disclosure. The carrier 100 is rotatably connected to the first base 200 through the first rotating member 400, the first base 200 is rotatably connected to the second base 300 through the second rotating member 500, the first driving mechanism is used for driving the carrier 100 to rotate relative to the first base 200, the second driving mechanism is used for driving the first base 200 to drive the carrier 100 to rotate relative to the second base 300, and the reset portion is elastically connected between the carrier 100 and the second base 300 to provide a reset force when the carrier 100 moves relative to the second base 300.

In the embodiment of the present disclosure, the first driving mechanism may directly drive the carrier 100 to rotate (rotation is performed around an axis extending in the Y direction) supported by the first rotating member 400 as compared to the first base 200. In this process, the first base 200 and the second base 300 are relatively stationary, so the carrier 100 is also rotated about an axis extending in the Y direction with respect to the second base 300 at the same time. The second driving mechanism may drive the first base 200 to rotate (rotate about an axis extending along the Z direction) supported by the second rotating member 500 as compared to the second base 300. Since the carrier 100 is disposed on the first base 200, the second driving mechanism can drive the carrier 100 to rotate about an axis extending in the Z direction as compared with the second base 300. In summary, the carrier 100 may be driven by the driving mechanism to rotate in two different directions relative to the second base 300 according to actual requirements, so as to adjust the optical path. It should be noted that the illustrated Z direction and Y direction are only for illustrative purposes, and are not necessarily perpendicular to the axis direction around which the two rotational movements are wrapped. In other embodiments, the angle between the two may be adaptively designed to be 70 °, 120 ° or the like according to practical requirements.

In the embodiment of the present disclosure, the reset portion may be elastically connected between the carrier 100 and the second base 300 to be capable of performing a reset function when the carrier 100 performs the above-described rotational movement as compared to the second base 300, and the present disclosure does not limit a specific structure of the reset portion as long as it can provide a corresponding reset force, which will be described in the following embodiments.

The present disclosure also does not limit the structure of the first and second rotating members 400 and 500 described above, as long as they can be supported between two parts corresponding thereto, and the two parts can be relatively rotated by a driving force. Similarly, the present disclosure is not limited to the first drive mechanism and the second drive mechanism, and may be electromagnetic drive, mechanical drive, or the like.

By using the above technical solution, the first rotating member 400 is disposed between the carrier 100 and the first base 200, and the second rotating member 500 is disposed between the first base 200 and the second base 300, so that a motion supporting structure can be provided for the carrier 100 when the carrier 100 rotates in two different directions compared with the second base 300, so that the carrier 100 can be relatively stable in support when the carrier 100 rotates compared with the second base 300, and has a certain supporting strength, so as to be suitable for a lens with a larger weight. In addition, when the optical actuator is externally impacted by the resetting portion elastically connected between the carrier 100 and the second base 300, the offset carrier 100 can be restored to the initial position under the action of the resetting portion, and the lens can be effectively controlled at the preset position regardless of the weight of the lens, so that the normal operation of the actuator is ensured.

Referring to fig. 1, in an embodiment of the present disclosure, the first rotating member 400 may include two support assemblies 410 symmetrically arranged at both sides of the carrier 100, and each support assembly 410 may include an arc-shaped recess 411 provided on one of the carrier 100 and the first base 200, and an arc-shaped protrusion 412 provided on the other of the carrier 100 and the first base 200 to be in shape-fit with the arc-shaped recess 411. In use, the arcuate projection 412 extends into the arcuate recess 411 in a form-fitting manner. Because the friction force between the cambered surface structures is small, the two cambered surface structures can provide a supporting force for the carrier 100 and can also provide good movement conditions (small movement friction) for the rotational movement of the carrier 100 compared with the first base 200.

Note that the present disclosure is not limited to the specific shape of the arc-shaped concave portion 411 and the arc-shaped convex portion 412, and may be a spherical surface as will be described later, a smooth arc-shaped curved surface (non-spherical body), or the like. Furthermore, in other embodiments, the support assembly 410 may also be configured to include a mating assembly that is a bore and a shaft.

Referring to fig. 1-2, 4 and 6, in an embodiment of the present disclosure, each support assembly 410 may include a plate spring 413 having both ends fixed to the carrier 100 and a middle portion protruding from the carrier 100, respectively. Here, the plate spring 413 may be concavely formed at a position near the middle to form the arc-shaped recess 411 described above. Since the plate spring 413 has a certain elasticity, the plate spring 413 between the carrier 100 and the first base 200 can perform a good buffering and damping and resetting function when the carrier 100 is subjected to an impact motion (the carrier 100 and the first base 200 are close to each other).

Referring to fig. 5 and 6, in order to save space and reduce the size of the optical actuator, the carrier 100 may be provided with elongated grooves 110 at positions for mounting the plate springs 413, and the grooves 110 may be formed with protrusions 120 at positions near both ends, respectively. Accordingly, mounting circular holes are formed in positions of the plate spring 413 near both ends, respectively, to be used in cooperation with the boss 120. The position of the groove 110 corresponding to the arc-shaped concave portion 411 may also be provided with a relief hole 130 matching the shape of the arc-shaped concave portion 411, so that when the carrier 100 is subjected to impact motion, the plate spring 413 may be compressed and the arc-shaped concave portion 411 enters the relief hole 130, that is, in a limited space, the deformation of the plate spring 413 after being compressed is improved, and the collision with the carrier 100 is avoided.

In addition, in other embodiments, in order to increase the deformation response speed of the plate spring 413 after being compressed, elongated mounting holes may be opened at both end mounting positions of the plate spring 413, and bolts may pass through the elongated mounting holes and fix the plate spring 413 to the carrier 100. When the plate spring 413 is impacted, the two ends of the plate spring 413 can move relative to the bolt in the extending direction of the long mounting hole, so that the deformation of the plate spring 413 is increased, and the elastic force is improved.

Referring to fig. 1 and 6, in an embodiment of the present disclosure, a ball 414 may be provided at a position of the first base 200 corresponding to the arc-shaped recess 411, the ball 414 forming the arc-shaped protrusion 412 described above. By arranging the balls 414 to form the arc-shaped convex parts 412, the friction force of relative rotation between the balls 414 can be reduced, abrasion is reduced, and the ball body has the advantages of high strength and durability. In addition to the balls 414 described above, in other embodiments, the arcuate projections 412 may be formed from hemispheres, as this disclosure is not limited thereto.

Referring to fig. 1, in order that the first base 200 may bring the carrier 100 into rotational movement as compared to the second base 300, in an embodiment of the present disclosure, the second rotating member 500 may include a rotating shaft 510 fixed to the second base 300 and a sleeve 520 fixed to the first base 200, wherein the rotating shaft 510 and the sleeve 520 may be sleeved through bearings. Moreover, in other embodiments, the positions of the rotation shaft 510 and the sleeve 520 may be interchanged, as well, which is not a limitation of the present disclosure.

In embodiments of the present disclosure, the sleeve 520 and the rotation shaft 510 may be integrally formed with their corresponding bases. Moreover, in other embodiments, the sleeve 520 and the rotating shaft 510 may be welded or otherwise assembled to their corresponding bases.

Referring to fig. 1 to 3, in an embodiment of the present disclosure, the reset portion may be a reed assembly 800, and the reed assembly 800 may include two first reeds 810 fixed to the second base 300, respectively, a second reed 820 positioned between the two first reeds 810 and fixed to the carrier 100, and a reed wire 830 connected between the first reed 810 and the second reed 820. So designed, when the carrier 100 rotates relative to the second base 300, the spring assembly 800 deforms (the spring wire 830 provides a main restoring force), and generates an elastic restoring force to drive the carrier 100 to restore. In addition, in other embodiments, the reset portion may also include magnetic attraction members, such as a yoke and a magnet, disposed on the second base 300 and the carrier 100, and reset is achieved by magnetic attraction between the magnetic attraction members.

In order for one reed assembly 800 to achieve a reset after movement of the carrier 100 in multiple directions, referring to fig. 3, in an embodiment of the present disclosure, the reed wires 830 may extend in a wave-like manner and symmetrically around the second reed 820 to be able to provide a reset force when the carrier 100 performs a rotational movement about the first rotational member 400. Alternatively, the restoring force is provided when the first base 200 brings the carrier 100 to a rotational movement about the second rotating member 500. Still alternatively, the first base 200 provides a restoring force in two directions when the carrier 100 is rotated about the first rotating member 400 and the first base 200 drives the carrier 100 to rotate about the second rotating member 500.

In addition, in other embodiments, the reset portion may also include two reed assemblies 800 independent of each other, one connected between the carrier 100 and the first base 200 and the other connected between the first base 200 and the second base 300, which is not limited by the present disclosure.

Referring to fig. 1-2, in an embodiment of the present disclosure, the first driving part may include a first driving magnet 610 fixed on the carrier 100 and a first driving coil 620 fixed on the second base 300 to be coupled with the first driving magnet 610. Specifically, the first driving coil 620 may be disposed on a wall surface of the second base 300 on which the rotation shaft 510 is disposed, and the first driving magnet 610 is correspondingly disposed on a wall surface of the carrier 100 facing the first driving coil 620 at a position corresponding to the first driving coil 620. And in the initial state, the projections of the magnetic force generated by the two components along the X direction and on the Z-Y plane are staggered with the projections of the connecting lines of the two support components 410 on the Z-Y plane, so that a moment for rotating the carrier 100 supported by the first rotating member 400 can be generated. Of course, the positions of the first driving coil 620 and the first driving magnet 610 may be interchanged here.

Referring to fig. 1-2, in an embodiment of the present disclosure, the second driving part may include a second driving magnet 710 fixed on the first base 200 and a second driving coil 720 fixed on the second base 300 to be coupled with the second driving magnet 710. Specifically, the second driving coil 720 may be disposed on a wall surface of the second base 300 on the side of the rotation shaft 510, and the second driving magnet 710 may be disposed on a wall surface of the first base 200 on the side of the sleeve 520, opposite to each other, and may generate a magnetic force when the coils are energized. In the initial position, the magnetic force is along the X-direction, and the projection in the Y-Z plane is offset from the projection of the second rotating member 500 in the Y-Z plane, so that a moment for rotating the carrier 100 with the second rotating member 500 as a support can be generated. Of course, the positions of the second driving coil 720 and the second driving magnet 710 may be interchanged here.

Further, in order to make the driving force provided by the second driving mechanism symmetrical and uniform, referring to fig. 1 to 2, in the embodiment of the present disclosure, the second driving part may include two sets of second driving magnets 710 and second driving coils 720 that are matched with each other and symmetrically arranged at both sides of the first base 200.

According to a second aspect of the present disclosure, an image capturing module is provided, which includes the optical device 900 and the optical actuator described above, and since the image capturing module has all the advantages of the optical actuator described above, the description thereof is omitted herein.

According to a third aspect of the present disclosure, an electronic device is provided, including the above-mentioned camera module, and since the electronic device has all the beneficial effects of the above-mentioned camera module, the description is omitted herein.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (11)

1. An optical actuator, comprising:

a carrier for carrying the optical device;

a first base for mounting the carrier;

a second base for accommodating the first base;

a first rotating member supported between the carrier and the first base, the carrier being rotatably connected to the first base through the first rotating member;

a second rotating member supported between the first base and the second base, the first base being rotatably connected to the second base through the second rotating member;

a first driving part for driving the carrier to rotate compared with the first base;

the second driving part is used for driving the first base to drive the carrier to rotate compared with the second base; and

and the reset part is elastically connected between the carrier and the second base so as to provide a reset force when the carrier moves relative to the second base.

2. The optical actuator of claim 1, wherein the first rotating member comprises two support assemblies symmetrically disposed on either side of the carrier, each support assembly comprising an arcuate recess provided on one of the carrier and the first base, and an arcuate protrusion provided on the other of the carrier and the first base that is in a form-fit with the arcuate recess.

3. An optical actuator according to claim 2, wherein each of said support members comprises a leaf spring having both ends fixed to said carrier and a central portion protruding from said carrier, respectively, wherein a position of said leaf spring near the center is concave to form said arc-shaped concave portion.

4. An optical actuator according to claim 3, wherein the first base is provided with balls at positions corresponding to the arcuate concave portions, the balls forming the arcuate convex portions.

5. The optical actuator of claim 1, wherein the second rotating member comprises a rotating shaft fixed to the second base and a sleeve fixed to the first base, wherein the rotating shaft and the sleeve are sleeved by a bearing.

6. An optical actuator according to any one of claims 1 to 5, wherein the reset portion is a reed assembly comprising two first reeds respectively fixed to the second base, a second reed positioned between the two first reeds and fixed to the carrier, and a reed wire connected between the first reed and the second reed.

7. An optical actuator according to claim 6, wherein the spring wire extends in a wave-like manner and symmetrically surrounds the second reed to be able to provide a return force when the carrier is in rotational movement about the first rotational member and/or to provide a return force when the first base carries the carrier in rotational movement about the second rotational member.

8. The optical actuator of claim 1, wherein the first driving part includes a first driving magnet fixed on the carrier and a first driving coil fixed on the second base and engaged with the first driving magnet, and the second driving part includes a second driving magnet fixed on the first base and a second driving coil fixed on the second base and engaged with the second driving magnet.

9. The optical actuator according to claim 8, wherein the second driving portion includes two sets of mutually-fitted second driving magnets and second driving coils symmetrically arranged on both sides of the first base.

10. An imaging module comprising an optical device and an optical actuator according to any one of claims 1 to 9.

11. An electronic device comprising the camera module of claim 10.