CN215990998U

CN215990998U - Optical actuator and camera module

Info

Publication number: CN215990998U
Application number: CN202122435446.5U
Authority: CN
Inventors: 黄晓敏; 董怿
Original assignee: Beijing Kelifor Technology Co ltd
Current assignee: Beijing Kelifor Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-03-08
Anticipated expiration: 2031-10-09

Abstract

The present disclosure relates to an optical actuator for mounting an optical device, the optical actuator including a fixed portion (10) and a moving portion (20) movable relative to the fixed portion (10), at least one end of the moving portion (20) in a moving direction being provided with a first magnetic portion (30), a surface of the fixed portion (10) facing the first magnetic portion (30) being provided with a second magnetic portion (40) capable of repelling the first magnetic portion (30). Due to the fact that repulsive magnetic force exists between the first magnetic part (30) and the second magnetic part (40), when the moving part (20) moves or is shaken or vibrated due to external impact, damage to an optical device or abnormal sound caused by the fact that the moving part (20) excessively moves to impact the fixing part (10) can be avoided.

Description

Optical actuator and camera module

Technical Field

The present disclosure relates to the field of miniature cameras, and in particular, to an optical actuator and a camera module.

Background

In the field of miniature cameras, the existing optical devices can realize functions such as automatic focusing and anti-shaking through movement. In the moving process, as the optical device is larger and heavier, and is shaken or vibrated due to external impact, abnormal sound or damage is easily caused by the collision of the optical device and the limiting surfaces at the two ends, for example, in some OIS motors, the moving part for mounting the optical device can move relative to the fixed part in the direction perpendicular to the optical axis, and when the moving part is vibrated due to external impact, the moving part can move to cross the limit position and collide with the fixed part, so that the optical device is damaged or abnormal sound is caused.

SUMMERY OF THE UTILITY MODEL

The disclosure aims to provide an optical actuator and a camera module, so as to solve the problem that when a moving part receives external impact or vibration, the moving part in the related art can cross a limit position to impact a fixed part, so that an optical device is damaged or abnormal sound is caused.

In order to achieve the above object, the present disclosure provides an optical actuator for mounting an optical device, the optical actuator including a fixed portion and a moving portion movable relative to the fixed portion, the moving portion being provided with a first magnetic portion at least one end in a moving direction, a surface of the fixed portion facing the first magnetic portion being provided with a second magnetic portion capable of repelling the first magnetic portion.

Optionally, the moving part is configured to be movable in a plurality of directions at an angle to each other, and the moving part is provided with the first magnetic part at both ends of each direction.

Optionally, the first magnetic part and the second magnetic part are permanent magnets respectively.

Optionally, the first magnetic part and the second magnetic part have opposite magnetizing directions.

Optionally, a plurality of first magnetic portions are disposed at both ends of the moving direction of the moving portion, and the number of the first magnetic portions at both ends is the same.

Optionally, the first magnetic part is embedded into the moving part and does not protrude from the surface of the moving part; the second magnetic part is embedded into the fixing part and does not protrude out of the surface of the fixing part.

Optionally, the first and second magnetic parts are different in size, and one of the smaller sizes completely faces the other of the larger sizes.

Optionally, the first magnetic part and the second magnetic part are the same size and are aligned in position.

Optionally, a support member for supporting the movement of the movement portion is disposed between the fixed portion and the movement portion.

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

Through above-mentioned technical scheme, when the motion portion removes or receives external impact and shake, because have repulsive magnetic force between first magnetism portion and the second magnetism portion, can avoid the motion portion motion excessively to strike the fixed part and lead to optical device damage or arouse the abnormal sound.

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 an optical actuator provided in accordance with an exemplary embodiment of the present disclosure;

FIG. 2 is an exploded view of an optical actuator provided in accordance with another exemplary embodiment of the present disclosure;

fig. 3-7 are schematic diagrams of a first magnetic part and a second magnetic part in an optical actuator provided according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

10 fixed part 20 moving part

30 first magnetic part 40 second magnetic part

50 supporting piece

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, the terms "first", "second", and the like are used for distinguishing 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 2, the present disclosure provides an optical actuator for mounting an optical device, the optical actuator including a fixed part 10 and a moving part 20 movable with respect to the fixed part 10, at least one end of the moving part 20 in a moving direction being provided with a first magnetic part 30, a surface of the fixed part 10 facing the first magnetic part 30 being provided with a second magnetic part 40 capable of repelling the first magnetic part 30. It should be noted here that the optical device may be any component involved in the imaging process, and may be, for example, a lens or a chip.

Here, in some embodiments, the first magnetic part 30 may be disposed at only one end of the moving part 20 in the moving direction, and in other embodiments, the first magnetic part 30 may be disposed at both ends of the moving part 20 in the moving direction, which is not limited in this disclosure. When the moving part 20 moves or is shocked by external impact, the repulsive magnetic force between the first magnetic part 30 and the second magnetic part 40 can prevent the moving part 20 from excessively impacting the fixed part 10 to damage the optical device or cause abnormal sound.

Furthermore, it should be explained that the present disclosure does not limit the shape of the first magnetic part 30 and the second magnetic part 40, and referring to fig. 3-6, in some embodiments, the shape of the first magnetic part 30 and the second magnetic part 40 may be provided as a hexahedron at the same time; referring to fig. 7, in other embodiments, the first and second

magnetic parts

30 and 40 may be simultaneously shaped as cylinders.

Further, the present disclosure does not limit the number of magnetic poles of the first magnetic part 30 and the second magnetic part 40, and referring to fig. 3 and 5-7, in some embodiments, the first magnetic part 30 and the second magnetic part 40 may be both single-pole magnets, i.e., having only one N pole and one S pole; referring to fig. 4, in other embodiments, the first and second

magnetic parts

30 and 40 may both be dipole magnets, i.e., may have two N poles and two S poles, in which case the dipole magnets may be formed by dipole magnetization or by the concatenation of two monopole magnets.

In order to provide protection against impacts in all directions in which the moving part 20 can move, in some embodiments the moving part 20 is configured to be movable in a plurality of directions at an angle to each other, the moving part 20 being provided with first magnetic parts 30 at both ends of each direction. Here, the moving direction of the moving part 20 may be a movement along the optical axis to realize the focusing function of the optical device, or a movement along a first direction and a second direction perpendicular to the optical axis plane to realize the anti-shake function of the optical device, wherein the first direction and the second direction may be perpendicular or at other angles, and hereinafter, for convenience of description, the case where the two directions are perpendicular to each other will be described as an example. Referring to fig. 1 and 2, the first direction corresponds to the X direction in the drawing, the second direction corresponds to the Y direction in the drawing, the movement in the two directions is used for realizing the anti-shake of the optical device, and the Z direction is perpendicular to the X-Y plane, and the movement in the direction is used for realizing the focusing of the optical device. In this case, after the optical device is mounted, the Z direction corresponds to the direction of the optical axis, and the X direction and the Y direction respectively correspond to the directions perpendicular to the optical axis. It should be noted that the "optical axis" direction refers to a direction passing through the center of the lens of the optical device and perpendicular to the lens, which is well known to those skilled in the art and will not be described herein too much. In the embodiment shown in fig. 1, the moving part 20 moves in the optical axis direction (Z direction), and both end surfaces thereof are provided with the first magnetic parts 30, and the second magnetic parts 40 on the fixed part 10 correspond one-to-one thereto; in the embodiment shown in fig. 2, the moving part 20 moves in the directions perpendicular to the optical axis (i.e., the X-direction and the Y-direction), and the surfaces of the four side directions thereof are each provided with a first magnetic part 30, and a second magnetic part 40 on the fixed part 10 corresponds one-to-one thereto.

To reduce manufacturing costs and improve overall bumper design stability, in some embodiments, first and second

magnetic portions

30 and 40 may each be a permanent magnet. Furthermore, in other embodiments, the first magnetic part 30 and the second magnetic part 40 may be provided as electromagnets at the same time. In addition to the above-described case where the first and second

magnetic parts

30 and 40 are provided as the same type of magnet, the first and second

magnetic parts

30 and 40 may be provided as different types of magnets, for example, in some embodiments, the first magnetic part 30 is provided as a permanent magnet and the second magnetic part 40 is provided as an electromagnet; in some other embodiments, the first magnetic part 30 is configured as an electromagnet, and the second magnetic part 40 is configured as a permanent magnet, which is not limited by the present disclosure.

Referring to fig. 3-7, in order to provide a magnetic force between the first and second

magnetic parts

30 and 40 that repels each other, in some embodiments, the first and second

magnetic parts

30 and 40 are magnetized in opposite directions. Here, in the embodiment of the present disclosure, the magnetizing directions of the first magnetic part 30 and the second magnetic part 40 are aligned in parallel with each other, and the repulsive force is maximized; in addition, in some other embodiments, the magnetizing directions of the first magnetic part 30 and the second magnetic part 40 are arranged at an angle, which is not limited by the present disclosure, as long as the mutual repulsion between the first magnetic part 30 and the second magnetic part 40 is satisfied.

Further, referring to fig. 3 to 7, the magnetization directions of the first magnetic part 30 and the second magnetic part 40 may be both horizontal magnetization and vertical magnetization, where the vertical magnetization is that the N poles and S poles of the two magnetic parts are arranged along the moving direction of the moving part 20; the magnetic part is magnetized horizontally, that is, the N pole and the S pole of the two magnetic parts are arranged in a direction perpendicular to the moving direction of the moving part 20, which is not limited in the present disclosure.

In order to increase the repulsive force between the first magnetic part 30 and the second magnetic part 40, referring to fig. 1-2, in some embodiments, both ends of the moving direction of the moving part 20 are provided with a plurality of first magnetic parts 30, and further, in order to ensure the uniformity of the repulsive force of the moving part 20, the number of first magnetic parts 30 at both ends of the moving part 20 is the same. Here, in the embodiment of the present disclosure, two first magnetic parts 30 may be disposed at both ends of the moving direction of the moving part 20, and in some other embodiments, three, four, etc. first magnetic parts 30 may be disposed at both ends of the moving direction of the moving part 20, which is not limited by the present disclosure.

Further, in some embodiments, the number of the first magnetic parts 30 and the number of the second magnetic parts 40 may also be different, for example, the number of the first magnetic parts 30 is two, the number of the second magnetic parts 40 is one, and when the second magnetic parts 40 are large in volume, the two first magnetic parts 30 and the second magnetic parts 40 both generate a repulsive force in the moving direction, which is not limited by the present disclosure.

In order to save space inside the optical actuator, referring to fig. 1-2, in some embodiments, the first magnetic part 30 is embedded in the moving part 20 and does not protrude from the surface of the moving part 20; the second magnetic part 40 is embedded in the fixing part 10 and does not protrude from the surface of the fixing part 10. It should be noted that the "surface" of the moving part 20 and the fixed part 10 herein refers to a surface that is not the overall outer contour of the two, but is a surface for embedding the corresponding magnetic part. In the embodiment of the present disclosure, the first magnetic part 30 is embedded in the moving part 20 and may have a surface of the first magnetic part 30 flush with an end surface of the moving part 20, and the second magnetic part 40 is embedded in the fixed part 10 and may have a surface of the second magnetic part 40 flush with an end surface of the fixed part 10. In other embodiments, the first magnetic part 30 is embedded in the moving part 20 and the end surface of the first magnetic part 30 is lower than the surface of the moving part 20, i.e. hidden in the fixed part 10 the second magnetic part 40 is embedded in the fixed part 10 and the end surface of the second magnetic part 40 is lower than the surface of the fixed part 10, i.e. hidden in the fixed part 10. Further, in addition to the above two cases, it is also possible to provide that the embedded positional relationship of the first magnetic part 30 and the second magnetic part 40 is different, for example, the first magnetic part 30 is embedded in the moving part 20 and the end face of the first magnetic part 30 is flush with the surface of the moving part 20, and the second magnetic part 40 is embedded in the fixed part 10 and the end face of the second magnetic part 40 is lower than the surface of the fixed part 10.

In order to prevent the first magnetic part 30 and the second magnetic part 40 from being misaligned during the movement so that the repulsive force between the two magnetic parts in the movement direction is reduced, referring to fig. 6, in some embodiments, the first magnetic part 30 and the second magnetic part 40 have different sizes, and the magnetic part with the smaller size completely faces the magnetic part with the larger size. Here, it should be noted that the projection of the moving portion 20 on the fixed portion is completely accommodated within the surface of the second magnetic portion 40, and the displacement does not reduce the repulsive force in the moving direction. Furthermore, in an embodiment of the present disclosure, the first magnetic part 30 may have a smaller size than the second magnetic part 40, and in other embodiments, the first magnetic part 30 may have a larger size than the second magnetic part 40, which is not limited by the present disclosure.

Referring to fig. 3-5, in order to facilitate production procurement and reduce the difficulty of the production process, in some embodiments, the first magnetic part 30 and the second magnetic part 40 are the same size and are aligned. During purchasing, only one magnetic part needs to be ordered in a unified mode, and during installation, the first magnetic part 30 and the second magnetic part 40 do not need to be distinguished, and only the two magnetic parts need to be installed in an aligned mode.

In order to allow the fixed part 10 and the moving part 20 to be spaced apart from each other and to be movable relative to each other, referring to fig. 1 to 2, in some embodiments, a support 50 for supporting the moving part 20 to move is disposed between the fixed part 10 and the moving part 20. Here, in the embodiment of the present disclosure, the supporting member 50 may be a spherical ball, and in other embodiments, the supporting member 50 may also be configured as a sliding shaft, a double-layer sliding shaft, and the like, which is not limited in the present disclosure.

According to the second aspect of the present disclosure, there is also provided a camera module, which includes an optical device and the above optical actuator, wherein the optical device is mounted on the optical actuator, and the optical actuator has all the above advantages, which are not described herein again, and the camera module can be used in electronic devices such as mobile phones and PADs.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of 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

1. An optical actuator for mounting an optical device, comprising a fixed part (10) and a moving part (20) movable relative to the fixed part (10), characterized in that at least one end of the moving part (20) in the direction of movement is provided with a first magnetic part (30), and the surface of the fixed part (10) facing the first magnetic part (30) is provided with a second magnetic part (40) capable of repelling the first magnetic part (30).

2. Optical actuator according to claim 1, wherein the moving part (20) is arranged to be movable in a plurality of directions at an angle to each other, the moving part (20) being provided with the first magnetic part (30) at both ends of each direction.

3. Optical actuator according to claim 1, wherein the first magnetic part (30) and the second magnetic part (40) are each a permanent magnet.

4. Optical actuator according to claim 3, wherein the first magnetic part (30) and the second magnetic part (40) are oppositely charged.

5. The optical actuator according to claim 1, wherein a plurality of the first magnetic portions (30) are provided at both ends of the moving direction of the moving portion (20), and the number of the first magnetic portions (30) at both ends is the same.

6. Optical actuator according to claim 1, wherein the first magnetic part (30) is embedded in the moving part (20) and does not protrude from the surface of the moving part (20); the second magnetic part (40) is embedded in the fixing part (10) and does not protrude from the surface of the fixing part (10).

7. Optical actuator according to claim 1, wherein the first magnetic part (30) and the second magnetic part (40) are of different sizes, and one of the smaller sizes is directly opposite the other of the larger sizes.

8. Optical actuator according to claim 1, wherein the first magnetic part (30) and the second magnetic part (40) are of the same size and are aligned in position.

9. Optical actuator according to claim 1, wherein a support (50) is arranged between the fixed part (10) and the moving part (20) to support the moving part (20) in movement.

10. A camera module comprising an optical device and an optical actuator according to any one of claims 1-9.