WO2023231849A1

WO2023231849A1 - Camera module and electronic device

Info

Publication number: WO2023231849A1
Application number: PCT/CN2023/095922
Authority: WO
Inventors: 侯清; 王建文; 刘笑寒; 陈宏�
Original assignee: 华为技术有限公司
Priority date: 2022-05-31
Filing date: 2023-05-24
Publication date: 2023-12-07
Also published as: CN117221671A

Abstract

The present application provides a camera module and an electronic device. The camera module comprises: a lens unit; an optical image stabilization (OIS) stabilizer used for driving the lens unit to move in a first direction, the first direction being perpendicular to an optical axis direction of the lens unit; and an auto focus (AF) actuator comprising a movable base, the movable base being fixedly connected to the OIS stabilizer, and the AF actuator being used for driving the movable base to move in the optical axis direction, so that the OIS stabilizer and the lens unit move in the optical axis direction. On the basis of the solution, the load of the OIS stabilizer can be reduced, so that the anti-shake function of the camera module is improved, thereby helping to take better quality photos, and improving the user experience.

Description

Camera modules and electronic equipment

This application claims priority to the Chinese patent application filed with the China Patent Office on May 31, 2022, with application number 202210606823.3 and the application name "Camera Module and Electronic Equipment", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the field of electronic equipment, and more specifically, to camera modules and electronic equipment.

Background technique

Mobile phone photography has always been the focus of people's attention. In order to improve the shooting quality, the camera module is required to integrate an optical image stabilizer (OIS) stabilizer and an auto focus (AF) actuator. However, the OIS stabilizer in traditional solutions has a heavy load, which may affect the anti-shake function of the camera module, thereby affecting the quality of the photos taken.

Contents of the invention

Embodiments of the present application provide a camera module that can reduce the load of the OIS stabilizer, thereby improving the anti-shake function of the camera module, which is beneficial to taking better quality photos and improving user experience.

In the first aspect, a camera module is provided, which includes:

lens unit;

Optical image stabilization OIS stabilizer, used to drive the lens unit to move in a first direction, the first direction being perpendicular to the optical axis direction of the lens unit;

An autofocus AF actuator, including a movable base fixedly connected to the OIS stabilizer, and the AF actuator is used to drive the movable base to move along the optical axis direction, So that the OIS stabilizer and the lens unit move along the optical axis direction.

It should be understood that the optical axis direction (Z-axis direction) is the light entrance direction of the lens unit, and the first direction (X-axis direction or Y-axis direction) is perpendicular to the optical axis direction. Wherein, the first direction may include a first sub-direction (X-axis direction) and a second sub-direction (Y-axis direction).

In the embodiment of the present application, the OIS stabilizer is fixedly connected to the movable base of the AF actuator, that is, the AF actuator can drive the movable base and the OIS stabilizer to move along the optical axis direction, thereby realizing the zoom function, and The OIS stabilizer only drives the lens unit to move in the first direction. Compared with the traditional solution, the OIS stabilizer is placed below the AF actuator, and the OIS needs to drive the AF actuator and lens unit to move in the first direction. The OIS stabilizer of this application has a smaller load and lower power consumption. , the anti-shake function is better, it can take better quality photos and improve the user experience.

In conjunction with the first aspect, in a possible implementation manner, the OIS stabilizer and the AF actuator are arranged in parallel along the first direction.

In the embodiment of the present application, the OIS stabilizer and the movable base can be integrally used as the moving part of the AF actuator, and the OIS The stabilizer and the AF actuator can be arranged in parallel along the first direction, thereby reducing the height of the camera module, which is beneficial to making the electronic device thinner and lighter.

In conjunction with the first aspect, in a possible implementation, the AF actuator further includes: a magnet, a coil and a base,

The magnet is fixedly connected to the movable base, and the coil is fixedly connected to the base;

When power is supplied to the coil, the magnetic force generated between the coil and the magnet drives the movable base to move along the optical axis direction relative to the base.

In conjunction with the first aspect, in a possible implementation, a first groove is provided on the wall of the base facing the movable base, and a second groove is provided on the wall of the movable base facing the first groove. Groove, the first groove and the second groove are arranged oppositely;

The AF actuator further includes a plurality of ball bearings, and the first groove and the second groove are used to accommodate the plurality of ball bearings.

In the embodiment of the present application, a first groove, a second groove and a ball bearing can be provided on the opposite walls of the base and the movable base, so that when the movable base moves along the optical axis direction, the base and the movable base Rolling friction occurs between the seats. In addition, the stability during movement can be improved and tilting can be prevented.

In conjunction with the first aspect, in a possible implementation, a first groove is provided on the wall of the base facing the movable base, and a second groove is provided on the wall of the movable base facing the first groove. groove,

The AF actuator further includes a sliding shaft, the first groove and the second groove are used to receive the sliding shaft, and the axial direction of the sliding shaft is parallel to the direction of the optical axis.

In the embodiment of the present application, a first groove, a second groove and a sliding shaft can be provided on the opposite walls of the base and the movable base, so that when the movable base moves along the optical axis direction, the base and the movable base Rolling friction occurs between the seats. In addition, the stability during movement can be improved and tilting can be prevented.

Combined with the first aspect, in a possible implementation, the AF actuator further includes:

A magnetic conductor, which is fixedly connected to the base, and is arranged opposite to the magnet;

The magnetic force between the magnetic conductor and the magnet is used to attach the movable base to the inner surface of the base.

In the embodiment of the present application, a pair of magnets (for example, a magnet and a magnet) can be placed opposite the base and the movable base, and the magnetic attraction between the two can be used to make the movable base fit against the inner side of the base. Therefore, when the movable base moves along the optical axis direction, the stability during movement is improved and tilting is prevented.

A shielding member is provided between the magnet and the movable base, and the shielding member is used to shield the magnetic force of the coil or the magnet.

In the embodiment of the present application, the shielding member can shield the magnetic force generated by the coil or magnet, thereby protecting the electronic components in the camera module.

A first circuit board, the first circuit board is electrically connected to the coil, and the first circuit board is used to power the coil.

Combined with the first aspect, in a possible implementation manner, the OIS stabilizer further includes:

a fixed unit, which is fixedly connected to the movable base;

A lens holder, the lens holder is used to install the lens unit;

At least one shape memory alloy SMA unit, one end of the at least one SMA unit is fixedly connected to the fixing unit, and the other end is fixedly connected to the lens frame. The at least one SMA unit is used to drive the lens frame along the Move in the first direction;

Wherein, the at least one SMA unit includes a first SMA unit, a second SMA unit, a third SMA unit and a fourth SMA unit, and the first direction includes a first sub-direction and a second sub-direction,

The first SMA unit and the third SMA unit are arranged in parallel and spaced apart along the first sub-direction, and the second SMA unit and the fourth SMA unit are arranged in parallel and spaced apart along the second sub-direction,

The first SMA unit and the third SMA unit are used to drive the lens frame to move along a first sub-direction, and the second SMA unit and the fourth SMA unit are used to drive the lens frame to move along a second sub-direction. sub-direction movement.

In the embodiment of the present application, the OIS stabilizer drives the lens frame to move in the first direction through the SMA unit, thereby driving the lens unit to move in the first direction to compensate for the shake of the lens unit, thereby taking better quality photos. On the other hand, the SMA unit occupies a small space, which is more conducive to reducing the size of the camera module.

Combined with the first aspect, in a possible implementation, the camera module further includes:

a second circuit board, and a cantilever connected to the second circuit board,

The cantilever is a spiral structure, and the second circuit board is used to supply power to each of the at least one SMA unit through the cantilever.

In the embodiment of the present application, the cantilever can keep its shape approximately unchanged when the OIS stabilizer moves along the optical axis direction, thereby ensuring the stability of power supply. In addition, the cantilever has a wide distribution range in the camera module and can provide power to other electronic components in the camera module, such as the aperture structure.

A control unit and a position sensor for detecting movement information of the lens unit, the control unit being used to control the OIS stabilizer to drive the lens unit to move in the first direction or control the movement of the lens unit according to the movement information. The AF actuator drives the movable base to move along the optical axis direction.

In the embodiment of the present application, the position sensor can be used to detect the movement information of the lens unit or electronic device, and the control unit can control the AF actuator and OIS stabilizer to drive the lens unit to compensate based on the movement information, thereby taking better quality photos. photo.

A telescopic structure installed on the side of the movable base facing away from the lens unit;

The telescopic structure includes a spring and a sleeve, the spring is accommodated in the internal space of the sleeve, and the sleeve has an opening on the side;

The telescopic structure also includes a stopper piece, one end of the stopper piece is fixedly connected to the movable base, and the other end of the stopper piece extends into the inner wall of the sleeve through the opening and between the outer walls to prevent the spring or the sleeve from disengaging from the movable base.

In the embodiment of the present application, the retractable structure is installed on the bottom surface of the movable base and can be used to compress the camera module and reduce the height of the camera module in the first direction when the camera module is in a non-working state; Alternatively, the retractable structure can be used to pop up the camera module when the camera module is in working state to enhance the zoom capability and long-distance shooting capability of the camera module.

In a second aspect, an electronic device is provided, characterized in that the electronic device includes the camera module described in any possible implementation manner in the first aspect.

In a third aspect, an electronic device is provided, characterized in that the electronic device includes a battery and the camera module described in any possible implementation manner in the first aspect.

Description of the drawings

Figure 1 is a schematic structural diagram of an electronic device provided in this embodiment.

Figure 2 is a control principle diagram of the camera module provided in this embodiment.

Figure 3 is an exploded view of the camera module provided by the embodiment of the present application.

Figure 4 is an exploded view of the OIS stabilizer provided by the embodiment of the present application.

FIG. 5 is an exploded view of the AF actuator provided by the embodiment of the present application.

Figure 6 is a schematic diagram of the connection between the OIS stabilizer and the movable base provided by the embodiment of the present application.

Figure 7 is a schematic diagram of the OIS stabilizer provided by the embodiment of the present application after being connected to the movable base.

FIG. 8 is a schematic diagram of the positional relationship between the OIS stabilizer and the AF actuator provided by the embodiment of the present application.

FIG. 9 is a schematic side cross-sectional view of a camera module provided by an embodiment of the present application.

Figure 10 is a schematic diagram of the connection between the upper cover, the OIS stabilizer and the movable base provided by the embodiment of the present application.

FIG. 11 is a schematic diagram of the sliding shaft structure of the AF actuator provided by an embodiment of the present application.

Figure 12 is a schematic diagram of a cantilever wiring structure provided by an embodiment of the present application.

Figure 13 is a schematic diagram of the connection between the cantilever wiring structure and the OIS stabilizer provided by the embodiment of the present application.

Figure 14 is a perspective view of the bottom surface of the camera module provided by the embodiment of the present application.

Figure 15 is a schematic diagram of a scalable structure provided by an embodiment of the present application.

Figure 16 is a schematic diagram of a cross-section of a telescopic structure provided by an embodiment of the present application.

Figure 17 is a schematic diagram of the positions of coils and magnets provided by the embodiment of the present application.

Figure 18 is a schematic diagram of the position of the ball bearing provided by the embodiment of the present application.

Detailed ways

The terminology used in the following examples is for the purpose of describing specific embodiments only and is not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "the" are intended to also Expressions such as "one or more" are included unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, "at least one" and "one or more" refer to one, two or more than two. The term "and/or" is used to describe the relationship between associated objects, indicating that there can be three relationships; for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, Where A and B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship.

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

Electronic devices, and embodiments for using such electronic devices are described below. In some embodiments, the electronic device The device may be a portable electronic device that also includes other functions such as a personal digital assistant and/or a music player function, such as a mobile phone, a tablet computer, a wearable electronic device with wireless communication functions (such as a smart watch), etc. Exemplary embodiments of portable electronic devices include, but are not limited to, carrying Or portable electronic devices with other operating systems. The above-mentioned portable electronic device may also be other portable electronic devices, such as a laptop computer (Laptop). It should also be understood that in some other embodiments, the above-mentioned electronic device may not be a portable electronic device, but a desktop computer.

FIG. 1 is a schematic structural diagram of an electronic device 1000 provided by an embodiment of the present application. (a) of FIG. 1 is a front view of the electronic device 1000, and (b) of FIG. 1 is a rear view of the electronic device 1000. As shown in FIG. 1 , an electronic device 1000 includes a first camera module 100 , a second camera module 200 , a display screen 300 , a back cover 400 and a frame 500 . As shown in FIG. 1 , the frame 500 surrounds the outer periphery of the display screen 300 and the outer periphery of the back cover 400 . The cavity formed between the display screen 300, the back cover 400, and the frame 500 can be used to place components such as power supplies, electronic devices, and circuit boards. The display screen 300 and the back cover 400 are arranged in parallel and spaced apart, and the display screen 300 and the back cover 400 are installed on both sides of the frame 500 respectively. The frame 500 and the back cover 400 may be an integral structure, or may be assembled (such as snap connection, bonding, etc.) to form an integrated structure.

The first camera module 100 and the second camera module 200 are located inside the frame 500. The first camera module 100 and the second camera module 200 are used to capture and collect images. The shooting direction of the second camera module 200 is opposite to the shooting direction of the first camera module 100 . Both the first camera module 100 and the second camera module 200 may include multiple lenses to achieve multiple shooting modes such as normal shooting, telephoto shooting, and wide-angle shooting.

The first camera module 100 and the second camera module 200 can integrate an image stabilizer (optical image stabilizer, OIS) system and an auto focus (auto focus, AF) system.

The OIS system can sense and respond to external excitations/interferences. For example, the OIS stabilizer can drive the lens to perform corresponding compensation on the X-axis or Y-axis, thus canceling out the image offset caused by shaking and ensuring that the camera operates in a shaking environment. The image can still be kept stable.

The AF system can adjust the focus. For example, the AF actuator can drive the lens to move in the Z-axis (optical axis) direction to focus the subject in front of the camera on the image plane to be captured by the image sensor.

In traditional camera modules, the OIS stabilizer needs to drive the AF actuator and lens unit for anti-shake compensation. The OIS stabilizer has a heavy load and consumes large power.

On the other hand, the OIS stabilizer and AF actuator are stacked in the Z-axis direction, resulting in a larger size of the camera module in the Z-axis direction, which is not conducive to the thinning of electronic devices.

The camera module 200 is used as an example for explanation. Figure 2 shows the control principle diagram of the camera module provided by the embodiment of the present application. As shown in FIG. 2 , the camera module 200 may include a position sensor, a control unit, an OIS stabilizer or an AF actuator, and a lens unit. Wherein, the position sensor may be a gyroscope, for example, used to collect movement information of the lens unit or electronic device, and send the movement information to the control unit. The control unit is used to control the OIS stabilizer or AF actuator to drive the lens unit according to the movement information. 210 performs OIS movement (movement in the X-axis or Y-axis direction) or AF movement (movement in the Z-axis direction).

The movement information may be the displacement direction and displacement length of the lens unit 210 . In this way, the camera module can compensate for lens shake and take better-quality photos.

Figure 3 shows an exploded view of the camera module provided by the embodiment of the present application. As shown in FIG. 3 , the camera module 200 may include a lens unit 210, a housing 220, an upper cover 230, an OIS stabilizer 240, and an AF actuator 250.

The lens unit 210 can be used to collect light from a photographed object, and its light entrance direction can generally be referred to as the optical axis direction.

The OIS stabilizer 240 may drive the lens unit 210 to move in a first direction (eg, X-axis or Y-axis) to compensate for shake of the lens unit 210. The AF actuator 250 can drive the OIS stabilizer 240 to move along the optical axis direction (eg, Z-axis), thereby driving the lens unit 210 to move along the optical axis direction to implement the zoom function.

In the embodiment of the present application, the first direction is the X-axis direction or the Y-axis direction, which is perpendicular to the optical axis direction of the lens unit 210 . The optical axis direction is the Z-axis direction, which is the optical axis direction of the lens unit 210 . The first direction may also include a first sub-direction (X-axis) and a second sub-direction (Y-axis).

According to the solution provided by the embodiment of the present application, the lens unit 210 serves as the movable unit of the OIS stabilizer 240, and the OIS stabilizer 240 only drives the lens unit 210 to perform OIS movement, thereby reducing the load of the OIS stabilizer 240 and reducing power consumption.

On the other hand, since the OIS stabilizer 240 only drives the lens unit 210 to perform OIS movement, and the AF actuator 250 drives the OIS stabilizer 240 to perform AF movement, it is possible to avoid the position of the OIS stabilizer 240 and the AF actuator 250 on the optical axis. By stacking the OIS stabilizer 240 and the AF actuator 250 in the same plane, the size of the camera module 200 in the optical axis direction can be reduced, making the camera module 200 thinner and lighter.

Figure 4 shows an exploded view of the OIS stabilizer provided by the embodiment of the present application. As shown in Figure 4, the OIS stabilizer may include a lens frame 241, a fixing unit 244, and at least one shape memory alloy (shape memory alloys, SMA) unit.

In this embodiment, the fixing unit 244 can be fixed on the upper surface of the movable base 254 (see Figure 5) as a fixing member of the OIS stabilizer 240; the lens frame 241 can be fixed with the lens unit 210 (see Figure 3) are connected together and serve as moving parts of the OIS stabilizer 240 . At least one SMA unit can drive the moving part to move in the first direction relative to the fixed part.

The SMA unit may be linear, strip-shaped or spring-shaped, which is not limited in the embodiments of this application. One end of the SMA unit can be fixedly connected to the lens frame 241 , and the other end of the SMA unit can be fixedly connected to the fixing unit 244 . The SMA unit is used to support and actuate the moving parts of the OIS stabilizer 240. When power is applied to the SMA unit, the shape of the SMA unit can change, for example, the length changes, so that the moving parts can perform OIS motion relative to the fixed part.

The at least one SMA unit may include a first SMA unit 242a, a second SMA unit 242b, a third SMA unit 242c, and a fourth SMA unit 242d.

The first SMA unit 242a and the third SMA unit 242c are taken as an example for description. The first SMA unit 242a and the third SMA unit 242c may be arranged in parallel and spaced apart along the first sub-direction (X-axis). One end of the first SMA unit 242a and the third SMA unit 242c is connected to the lens frame 241, and the other end is connected to the fixing unit 244, so as to support the lens frame 241 of the OIS stabilizer 240 and drive the lens frame 241 to move along the first sub-direction. .

It should be noted that since the SMA unit needs to drive the lens holder 241 to move in the positive direction of the X-axis or the negative direction of the X-axis, the SMA units can be in groups of two, for example, the first SMA unit 242a and the third SMA unit 242c are in one group. The first SMA unit 242a can drive the lens frame 241 to move in the positive direction of the X-axis, and the third SMA unit 242c can drive the lens frame 241 to move in the negative direction of the X-axis.

By analogy, the second SMA unit 242b and the fourth SMA unit 242d may be disposed along the second sub-direction (Y-axis), thereby driving the lens frame 241 to move along the second sub-direction, so that the lens unit 210 moves along the second sub-direction. move.

SMA units may have different shapes at higher and lower temperatures (eg, room temperature) respectively. For example, for When electricity is applied to it, the length of the SMA unit decreases due to rising temperature. If the power applied to it is reduced, the length of the SMA unit increases due to cooling. Therefore, the length of the SMA unit can change as the applied power changes, thereby driving the moving member of the OIS stabilizer 240 to move along the first and second sub-directions (X-axis and Y-axis).

It will be appreciated that the SMA units may be made from any other variety of materials capable of controlling length when powered.

In this embodiment, the lens frame 241 is generally annular and can be used to install the lens unit 210 . For example, the lens unit 210 is disposed in the middle of the lens frame 241 .

In one embodiment, the lens holder 241 may include a first clamping jaw 243a, a second clamping jaw 243b, a third clamping jaw 243c, and a fourth clamping jaw 243d. Among them, the first clamping claw 243a and the second clamping claw 243b are arranged adjacently, the third clamping claw 243c and the fourth clamping claw 243d are arranged adjacently, and the first clamping claw 243a and the third clamping claw 243c are arranged along the opposite direction of the lens frame 241. corner settings.

The fixing unit 244 may include fifth, sixth, seventh, and eighth jaws 244a, 244b, 244c, and 244d. The fifth clamping jaw 244a and the eighth clamping jaw 244d are arranged adjacently, the sixth clamping jaw 244b and the seventh clamping jaw 244c are arranged adjacently, and the fifth clamping jaw 244a and the sixth clamping jaw 244b are arranged diagonally along the fixing unit 244 .

The fixing unit 244 and the clamping jaws, and the lens holder 241 and the clamping jaws can be limited by a mechanical structure, can also be fixedly connected together through screw connections, or can be an integrally formed structure.

In this embodiment, one end of the first SMA unit 242a can be connected to the first clamping claw 243a, and the other end can be connected to the fifth clamping claw 244a, so that the first SMA unit 242a can be disposed along the first sub-direction; One end of the two SMA units 242b can be connected to the second clamping jaw 243b, and the other end can be connected to the sixth clamping jaw 244b, so that the second SMA unit 242b can be disposed along the second sub-direction. Similarly, the positions and connection relationships of the third SMA unit 242c and the third SMA unit 242d may refer to the related descriptions of the first SMA unit 242a and the second SMA unit 242b.

In the embodiment of the present application, the first clamping jaw 243a, the second clamping jaw 243b, the third clamping jaw 243c and the fourth clamping jaw 243d may be primary clamping jaws, the fifth clamping jaw 244a, the sixth clamping jaw 244b, the The seventh clamping jaw 244c and the eighth clamping jaw 244d may be negative electrode clamping jaws. The four SMA units can be respectively powered through the clamping claws, thereby changing the length of each SMA unit respectively, thereby driving the lens frame 241 and the lens unit 210 to perform OIS movement.

Further, the OIS stabilizer may include a first common pole 245a and a second common pole 245b. The first common pole 245a may be disposed adjacent to the fifth clamping claw 244a and the eighth clamping claw 244d. The second common pole 245b may be connected to the fifth clamping claw 244a and the eighth clamping claw 244d. The six clamping jaws 244b and the seventh clamping jaw 244c are arranged adjacently. When powering the first SMA unit 242a, the current flow may be, for example, from the first clamping jaw 243a to the first SMA unit 242a, to the fifth clamping jaw 244a, and then to the first common pole 245a.

In one embodiment, the OIS stabilizer 240 may also include an upper cover 230 (see Figure 3). The upper cover 230 covers the lens holder 241 and is used to limit the lens holder 241 and prevent the lens holder 241 and the lens unit 210 from operating. OIS tilts when moving.

FIG. 5 shows an exploded view of the AF actuator provided by an embodiment of the present application. As shown in FIG. 5 , the AF actuator 250 may include a base 251 , a coil 252 fixed to the base 251 , a movable base 254 and a magnet 257 fixed to the movable base 254 . Among them, the magnet 257 and the coil 252 are arranged oppositely.

In this embodiment, the coil 252 may be embedded in a side wall of the base 251, or may be connected to one side of the base 251 through glue dispensing, heat riveting or structural crimping. The magnet 257 can be connected to one side of the base 251 through glue dispensing, heat riveting or structural buckling.

The base 251 can serve as a fixed component of the AF actuator 250 , and the movable base 254 can serve as a moving component of the AF actuator 250 .

In one embodiment, the AF actuator 250 may further include a first circuit board 253 (eg, a flexible printed circuit board (FPC)) connected to the coil 252 for powering the coil 252.

In one embodiment, the AF actuator 250 may also include a magnetic conductor 258 disposed on the outer side of the base 251. The magnetic conductor 258 may have magnetism. Under the action of the magnetic attraction between the magnetic conductor 258 and the magnet 257, The OIS stabilizer 240 can fit on the inner surface of the base 251 to prevent tilting during AF movement.

Optionally, the magnetic attraction force of the magnet 258 on the magnet 257 is greater than the magnetic attraction force of the magnet 257 on the magnet 258 . In this way, it can be ensured that the OIS stabilizer 240 can be firmly attached to the inner surface of the base 251 to prevent tilting during the AF movement.

It should be understood that in the embodiment of the present application, multiple magnetic attraction structures of fixed magnets and magnetic conductors can also be added to the base 251 and the movable base 254 to facilitate free adjustment of the magnetic attraction force.

In one embodiment, the AF actuator 250 may further include a shield 255 disposed between the magnet 257 and the OIS stabilizer 240 . The shield 255 can isolate the magnetic force and protect the electronic components inside the camera module 200 . The shield 255 can shield the magnetic force of the magnet 257 or the magnetic force generated by the coil 252 when energized.

In the embodiment of the present application, the magnet 257 and the shield 255 can be fixedly connected to the movable base 254 through glue dispensing, structural coupling, etc.

In one embodiment, when power is applied to the coil 252, the movable base 254 can move in the direction of the optical axis under the magnetic force generated between the coil 252 and the magnet 257.

In one embodiment, the base 251 may further include a first groove 2511 and a plurality of ball bearings 256, and the movable base 254 may further include a second groove 2541. The first groove 2511 is provided on the side of the base 251 facing the movable base 254, and the second groove 2541 is provided on the side of the movable base 254 and faces the first groove 2511. The space formed by the first groove 2511 and the second groove 2541 can be used to accommodate a plurality of ball bearings 256 .

The first groove 2511 and the second groove 2541 are used to guide the movable base station 254 to move along the optical axis direction relative to the base 251 . When the movable base 254 moves relative to the base 251 along the optical axis direction, the ball bearing 256 can cause rolling friction to occur between the two.

Optionally, the ball bearing 256 includes a first ball 2561, a second ball 2562 and a third ball 2563, wherein the second ball 2562 is disposed between the first ball 2561 and the third ball 2362, and the diameter of the second ball 2562 is smaller than The diameters of the first ball 2561 and the third ball 2362. In this way, there are two points of support between the OIS stabilizer and the AF actuator, which makes the movable base 254 more stable when moving and prevents tilting, which affects the shooting quality.

Alternatively, the first groove 2511 may be a V-shaped groove. The second groove 2541 may be a U-shaped groove, a square groove, or a trapezoidal groove.

Figure 6 shows a schematic diagram of the connection between the OIS stabilizer and the movable base provided by the embodiment of the present application. Figure 7 shows a schematic diagram after the OIS stabilizer provided by the embodiment of the present application is connected to the movable base. FIG. 8 shows a schematic diagram of the positional relationship between the OIS stabilizer and the AF actuator provided by the embodiment of the present application. FIG. 9 is a schematic side cross-sectional view of a camera module provided by an embodiment of the present application.

FIG. 6 also shows the connection relationship between various components of the OIS stabilizer 240. For details, reference may be made to the relevant description of the embodiment shown in FIG. 4.

In this embodiment, the OIS stabilizer 240 may be fixedly connected to the movable base 254. For example, the OIS stabilizer 240 may be fixedly connected to one side of the movable base 254 , or the OIS stabilizer 240 may be fixedly connected to an upper surface of the movable base 254 . For another example, the fixing unit 244 can be fixed by glue dispensing/heat riveting, etc. Fixed connection with the movable base 254.

In one embodiment, the movable base 254 may be in the shape of a lidless box, and the space inside the movable base 254 may be used to accommodate the OIS stabilizer 240 . The movable base 254 has a through hole in the middle, which can be used to place the lens unit 210 or to allow light to enter the lens unit 210 .

Referring to FIGS. 7 and 8 , the base 251 may be frame-shaped and include four frames. The movable base 254 and the OIS stabilizer 240 may be accommodated as a whole in an internal space surrounded by the four frames of the base 251 .

As shown in FIG. 9 , the AF actuator 250 and the OIS stabilizer 240 may be arranged in parallel along the first direction. That is, the AF actuator 250 and the OIS stabilizer 240 may be disposed on the same plane.

In the embodiment of the present application, the coil 252 can be powered through the first circuit board 253, so that the magnetic force generated between the coil 252 and the magnet 257 is used to drive the movable base 254 and the OIS stabilizer 240 to move along the optical axis direction, thereby The lens unit 210 is driven to move along the optical axis direction to implement the zoom function.

Based on the above solution, the OIS stabilizer 240 can only drive the lens unit 210 to perform OIS movement, thereby reducing the load of the OIS stabilizer 240 and reducing power consumption.

On the other hand, the OIS stabilizer 240 is located on the same plane as the AF actuator 250 and can be located inside the movable base 254 of the AF actuator 250, thereby reducing the size of the camera module 200 along the optical axis direction. , making the camera module 200 and the electronic device equipped with the camera module 200 thinner and lighter.

Figure 10 shows a schematic diagram of the connection between the upper cover 230, the OIS stabilizer and the movable base provided by the embodiment of the present application. As shown in FIG. 10 , the upper cover 230 can cover the lens frame 241 of the OIS stabilizer 240 and be fixedly connected to the movable base 254 . In this way, the upper cover 230 can be used to limit the lens holder 241 to prevent the lens holder 241 and the lens unit 210 from tilting during OIS movement.

The methods of fixed connection between the upper cover 230 and the movable base 254 include but are not limited to buckle connection, glue connection or screw connection, which are not limited in the embodiments of this application.

FIG. 11 shows a schematic diagram of the sliding shaft structure of the AF actuator provided by the embodiment of the present application. As shown in FIG. 11 , the base 251 may further include a first groove 2511 and at least one sliding shaft 259 , and the movable base 254 may further include a second groove 2541 . The first groove 2511 is provided on the side of the base 251 facing the movable base 254, and the second groove 2541 is provided on the side of the movable base 254 and faces the first groove 2511. The sliding shaft 259 is disposed in the space formed by the first groove 2511 and the second groove 2541 along the optical axis direction.

The sliding shaft 259 disposed between the first grooves 2511 and 2541 is used to guide the movable base station 254 to move along the optical axis direction relative to the base 251 . When the movable base 254 moves along the optical axis direction relative to the base 251, the sliding shaft 2591 can reduce the friction between the movable base 254 and the base 251.

Figure 12 shows a schematic diagram of the cantilever wiring structure provided by the embodiment of the present application. Figure 13 shows a schematic diagram of the connection between the cantilever wiring structure and the OIS stabilizer provided by the embodiment of the present application. In this embodiment of the present application, the camera module 200 may also include a cantilever wiring structure 260. As shown in FIG. 12, the cantilever wiring structure 260 includes a second circuit board 261 and a cantilever 262. The second circuit board 261 may be a flexible printed circuit board, for example, and is used to provide power to the camera module 200 through the cantilever 262 .

The second circuit board 261 and the first circuit board 253 may be the same circuit board, or they may be different circuit boards.

When the second circuit board 261 and the first circuit board 253 are the same circuit board, the first circuit board 253 or the second circuit board 261 can simultaneously operate the coil 252 of the AF actuator 250 and the SMA unit of the OIS stabilizer 240. powered by.

When the second circuit board 261 and the first circuit board 253 are different circuit boards, the first circuit board 253 and the second circuit board 253 are different circuit boards. The board 261 can power the coil 252 of the AF actuator 250 and the SMA unit of the OIS stabilizer 240, respectively.

The cantilever 262 has elasticity, specifically a spiral structure, and is used for arranging circuit wiring. For example, a positive circuit line and a negative circuit line may be arranged on the cantilever 262 . Due to its spiral structure, the cantilever 262 can keep its shape substantially unchanged when the OIS stabilizer 24 moves along the first direction, thereby ensuring the stability of power supply.

It should be noted that an independent circuit can be arranged to supply power to each SMA unit, so as to control the length of each SMA unit, thereby driving the lens holder 241 and the lens unit 210 along the first direction (X axis or Y axis). )move.

In the embodiment of the present application, the OIS stabilizer 240 is driven by the AF actuator 250 and can move along the optical axis direction (Z-axis). The cantilever wiring structure 260 can keep its shape substantially unchanged when the OIS stabilizer 240 moves along the optical axis direction, thereby ensuring the stability of power supply. In addition, due to the spiral structure of the cantilever wiring structure 260, the distribution range in the camera module 200 is large, and it can also provide power to other electronic components in the camera module 200, such as the aperture structure.

As shown in Figure 13, the cantilever 262 of the cantilever wiring structure 260 can be connected to the first clamping claw 243a, the second clamping claw 243b, the third clamping claw 243c and the fourth clamping claw 243d through welding or other methods to serve as an SMA unit. One pole of the power supply circuit; the cantilever 262 can also be welded to the first common pole 245a and the second common pole 245b to serve as the other pole of the power supply circuit of the SMA unit.

Taking the second SMA unit 242b as an example for illustration, one end of the second SMA unit 242b is electrically connected to the second clamping claw 243b, and the other end is electrically connected to the sixth clamping claw 244b, wherein the sixth clamping claw 244b is connected to the second common pole. 245b electrical connection. One end electrically connected to the second clamping claw 243b may be a positive electrode, and the other end electrically connected to the sixth clamping claw 244b may be a negative electrode. In this way, the second circuit board 261 can be electrically connected to both ends of the second SMA unit through the cantilever 262, so that the amount of power applied to the second SMA unit can be controlled according to the control information sent by the control unit, thereby driving the lens frame 241 and the lens. Unit 210 moves.

In the embodiment of the present application, the first common pole 245a can be used as the common pole of the fifth clamping jaw 244a and the eighth clamping jaw 244d, that is, the fifth clamping jaw 244a, the eighth clamping jaw 244d and the second common pole 245a are electrically connected. Connection; the second common pole 245b can be used as the common pole of the sixth clamping claw 244b and the seventh clamping claw 244c, that is, the sixth clamping claw 244b and the seventh clamping claw 244c are both electrically connected to the second common pole 245b. For example, the first common pole 245a and the second common pole 245b are both common negative poles.

Alternatively, the cantilever 262 may also be directly connected to the clamping jaw (for example, the sixth clamping jaw 244b) of the fixing unit 244 by welding or other means.

Figure 14 shows a perspective view of the bottom surface of the camera module provided by the embodiment of the present application. FIG. 14 is a schematic diagram of the camera module 200 in a non-working state. As shown in FIG. 14 , the camera module 200 may include a movable base 254 , a base 251 , and a retractable structure 270 installed on the movable base 254 .

The retractable structure 270 is installed on the bottom surface of the movable base 254 and can be used to compress the camera module 200 and reduce the height of the camera module 200 in the first direction when the camera module 200 is in a non-working state; or, The retractable structure 270 can be used to pop up the camera module 200 when the camera module 200 is in a working state, thereby enhancing the zoom capability and long-distance shooting capability of the camera module 200 .

Figure 15 shows a schematic diagram of a scalable structure provided by an embodiment of the present application. Figure 16 shows a schematic diagram of a cross-section of a telescopic structure provided by an embodiment of the present application. Among them, Fig. 16 is a schematic diagram of the AA cross-section shown in Fig. 14, (a) of Fig. 16 is a schematic cross-sectional diagram of the spring 271 in a released state, and Fig. 16 (b) is a schematic diagram of the spring 271 in a compressed state. Schematic cross-section.

As shown in (a) and (b) of FIG. 15 , the telescopic structure 270 may include a spring 271 , a sleeve 272 and a stopper piece 273 .

The sleeve 272 is cylindrical, and the space inside the sleeve 272 can accommodate the spring 271 . Openings are provided on the side of the sleeve 272 so that the diameter dimension of the portion of the sleeve 272 where the through hole is provided is smaller than the diameter dimension of the portion where the through hole is not provided.

The stopper piece 273 is provided with a through hole in the middle, which can cooperate with the sleeve 272 . The sleeve 272 can be installed in the through hole provided in the middle of the stopper piece 273 . As shown in (b) of FIG. 15 , the length L of the stopper piece 272 along the direction in which the through hole is opened is smaller than the diameter D of the sleeve 272 .

The stop piece 273 can be used to prevent the sleeve 272 and the spring inside the sleeve 272 from coming out of the camera module 200 . As shown in (a) of FIG. 16 , the telescopic structure 270 can be inserted into the opening on the bottom surface of the movable base 254 , and the stopper piece 273 can be fixedly connected to the bottom surface of the movable base 254 . Since the stopper piece 272 The length L along the opening direction of the through hole is smaller than the diameter D of the sleeve 272 , and the sleeve 272 can be limited by the stopper piece 272 so that it cannot separate from the camera module 200 .

It should be understood that the stopper piece 272 can extend between the inner wall and the outer wall of the sleeve 272 through the opening on the side of the sleeve 272 . From another perspective, the projection of the side wall of the sleeve 272 along the optical axis direction overlaps with the projection of the stopper piece 272 along the optical axis direction. In this way, the unopened portion of the sleeve 272 can be limited by the stopper piece 272 so that it cannot separate from the camera module 200 .

As shown in (b) of FIG. 16 , the camera module 200 may further include a driving mechanism 280 . When the camera module 200 is in a non-working state, the driving mechanism 280 can continuously apply force along the Z direction to the camera module 200 to compress the spring 271, thereby reducing the height of the camera module 200.

When the driving mechanism 280 removes the force exerted along the Z direction, the camera module 200 can be bounced up under the action of the spring 271 .

The driving mechanism 280 may be a motor driving mechanism, or may be a motor-driven mechanical structure, which is not limited by the embodiment of the present application.

The driving mechanism 280 can be covered above the housing 220 of the camera module 200, or can be provided on the side of the housing 220, which is not limited by the embodiment of the present application.

Figure 17 shows a schematic diagram of the positions of coils and magnets provided by the embodiment of the present application. Figure 17 is a schematic top view of the camera module 200. The coils 252 and the magnets 257 can be arranged in groups facing each other. The camera module can include at least one set of coils and magnets. As shown in (a) of FIG. 17 , the coil 252 may be disposed on one side of the base 251 , and the magnet 257 is disposed on the movable base 254 (not shown in FIG. 17 , see FIGS. 7 and 8 ) facing the coil 252 On the side. The positions of one set of coils and magnets and four sets of coils and magnets in the camera module can be shown in (b) and (c) of Figure 17 . In addition, the coil 252 and the magnet 257 may also be arranged diagonally, as shown in (d), (e), and (f) of Figure 17 .

Figure 18 shows a schematic position diagram of the ball bearing provided by the embodiment of the present application. As shown in (a) of FIG. 18 , the camera module may include a ball bearing 256 . The ball bearing 256 may be disposed on one side of the base 251 , or may be disposed on two opposite sides of the base 251 , or may also be provided along opposite sides. Corner settings. The position of the sliding shaft, the first groove or the second groove in the camera module can also refer to the description in Figure 18 .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A camera module, characterized in that the camera module includes:

lens unit(210);

Optical image stabilization OIS stabilizer (240), used to drive the lens unit (210) to move in a first direction, the first direction being perpendicular to the optical axis direction of the lens unit (210);

The autofocus AF actuator (250) includes a movable base (254). The movable base (254) is fixedly connected to the OIS stabilizer (240). The AF actuator (250) is The movable base (254) is driven to move along the optical axis direction, so that the OIS stabilizer (240) and the lens unit (210) move along the optical axis direction.
The camera module according to claim 1, wherein the OIS stabilizer (240) and the AF actuator (250) are arranged in parallel along the first direction.
The camera module according to claim 2, characterized in that the AF actuator (250) further includes: a magnet (257), a coil (252) and a base (251),

The magnet (257) is fixedly connected to the movable base (254), and the coil (252) is fixedly connected to the base (251);

When power is supplied to the coil (252), the magnetic force generated between the coil (252) and the magnet (257) drives the movable base (254) relative to the base (251) along the Movement in the direction of the optical axis.
The camera module according to claim 3, characterized in that a first groove (2511) is provided on the wall of the base (251) facing the movable base (254), and the movable base (251) 254) A second groove (2541) is provided on the wall facing the first groove (2511), and the first groove (2511) is opposite to the second groove (2541);

The AF actuator (250) further includes a plurality of ball bearings (256), and the first groove (2511) and the second groove (2541) are used to accommodate the plurality of ball bearings (256).
The camera module according to claim 3, characterized in that:

A first groove (2511) is provided on the wall of the base (251) facing the movable base (254), and a first groove (2511) is provided on the wall of the movable base (254) facing the first groove (2511). There is a second groove (2541), the first groove (2511) and the second groove (2541) are arranged oppositely;

The AF actuator (250) also includes a sliding shaft (259), the first groove (2511) and the second groove (2541) are used to accommodate the sliding shaft (259), the sliding shaft (259) 259) is parallel to the optical axis direction.
The camera module according to any one of claims 3-5, characterized in that the AF actuator (250) further includes:

Magnetic conductor (253), the magnetic conductor (253) is fixedly connected to the base (251), and the magnetic conductor (253) is arranged opposite to the magnet (257);

The magnetic force between the magnetic conductor (253) and the magnet (257) is used to fit the movable base (254) to the inner surface of the base (251).
The camera module according to any one of claims 3-5, the AF actuator (250) further includes:

Shield (255), the shield (255) is provided between the magnet (257) and the movable base (254), the shield (255) is used to shield the coil (252) The magnetic force or the magnetic force of the magnet (257).
The camera module according to any one of claims 1-7, characterized in that the AF actuator (250) further includes:

A first circuit board (253), the first circuit board (253) is electrically connected to the coil (252), and the first circuit board (253) is used to supply power to the coil (252).
The camera module according to any one of claims 1-8, characterized in that the OIS stabilizer (240) further includes:

Fixed unit (244), the fixed unit (244) is fixedly connected to the movable base (254);

Lens holder (241), the lens holder (241) is used to install the lens unit (210);

At least one shape memory alloy SMA unit. One end of the at least one SMA unit is fixedly connected to the fixing unit (244), and the other end is fixedly connected to the lens frame (241). The at least one SMA unit is used to drive the The lens holder (241) moves along the first direction;

Wherein, the at least one SMA unit includes a first SMA unit (242a), a second SMA unit (242b), a third SMA unit (242c) and a fourth SMA unit (242d), and the first direction includes a first sub-unit direction and second sub-direction;

The first SMA unit (242a) and the third SMA unit (242c) are arranged in parallel and spaced apart along the first sub-direction, and the second SMA unit (242b) and the fourth SMA unit (242d) are arranged along the first sub-direction. The second sub-directions are arranged at parallel intervals,

The first SMA unit (242a) and the third SMA unit (242c) are used to drive the lens frame (241) to move along the first sub-direction, and the second SMA unit (242b) and the The fourth SMA unit (242d) is used to drive the lens frame (241) to move along the second sub-direction.
The camera module according to claim 9, further comprising:

a second circuit board (261), and a cantilever (262) connected to the second circuit board (261),

The cantilever (262) has a spiral structure, and the second circuit board (261) is used to supply power to each SMA unit in the at least one SMA unit through the cantilever (262).
The camera module according to any one of claims 1-10, said camera module further comprising:

A control unit and a position sensor for detecting movement information of the lens unit (210). The control unit is used to control the OIS stabilizer (240) to drive the lens unit (210) along the desired direction according to the movement information. The first direction movement or controlling the AF actuator (250) drives the movable base (254) to move along the optical axis direction.
The camera module according to any one of claims 1-11, said camera module further comprising:

A telescopic structure (270) installed on the side of the movable base (254) away from the lens unit (210);

The telescopic structure (270) includes a spring (271) and a sleeve (272). The spring (271) is accommodated in the internal space of the sleeve (272). The sleeve (272) has an opening on its side. hole;

The telescopic structure (270) also includes a stopper piece (273). One end of the stopper piece (273) is fixedly connected to the movable base (254), and the other end of the stopper piece (273) is fixedly connected to the movable base (254). One end extends between the inner wall and the outer wall of the sleeve (272) through the opening to prevent the spring (271) or the sleeve (272) from being separated from the movable base (254).
An electronic device, characterized in that the electronic device includes the camera module according to any one of claims 1 to 12.