Actuator, camera module and electronic device

Abstract

The present disclosure relates to an actuator, a camera module and an electronic device. The actuator comprises a seat body, a stator magnet located in the seat body and connected to the seat body, a mover assembly comprising a coil circuit board, the coil circuit board comprising a first energized coil, the first energized coil and the stator magnet interactively driving the mover assembly to move relative to the stator magnet, and a drive chip disposed on the coil circuit board and in conduction with the first energized coil, the drive chip being configured to be connected to an external power supply circuit to supply power to the first energized coil.

Description

Technical Field

[0001] This disclosure relates to the field of terminal technology, and in particular to an actuator, a camera module, and an electronic device. Background Technology

[0002] With the development of science and technology, users have increasingly higher requirements for the shooting functions and image quality of terminal devices. In order to improve the image quality of cameras, focusing and image stabilization functions are usually configured for cameras.

[0003] In related technologies, the interaction between magnets and coils within a motor is typically used to drive the movement of the lens within a camera to achieve focusing or image stabilization. This technology also requires a separate driver chip, which needs to be connected to external pins of the motor's coils, making manufacturing difficult. Summary of the Invention

[0004] This disclosure provides an actuator, a camera module, and an electronic device to address the shortcomings of the related art.

[0005] According to a first aspect of the present disclosure, an actuator is provided, comprising:

[0006] seat body;

[0007] A stator magnet, the stator magnet being located within the base body and connected to the base body;

[0008] A mover assembly, the mover assembly including a coil circuit board, the coil circuit board including a first energized coil, the first energized coil and the stator magnet interact to drive the mover assembly to move relative to the stator magnet;

[0009] A driver chip is disposed on the coil circuit board and is connected to the first energized coil. The driver chip is used to connect to an external power supply circuit to supply power to the first energized coil.

[0010] Optionally, the moving part assembly includes a first moving part assembly, the first moving part assembly further including a first mounting base movably disposed in the base body, the coil circuit board being disposed around the first mounting base in a first direction and facing either end of the stator magnet in the first direction, the first mounting base being used to fix the lens, the stator magnet interacting with the first energized coil to drive the first moving part assembly to reciprocate in a plane perpendicular to the first direction, or to drive the first moving part assembly to reciprocate along the first direction.

[0011] Optionally, multiple stator magnets are spaced apart around a first direction, and the coil circuit board includes multiple first energized coils, with each of the multiple stator magnets and the multiple first energized coils corresponding to one another.

[0012] Wherein, the magnetic pole arrangement direction of the stator magnet is perpendicular to the first direction, the axis of the first energized coil is parallel to the first direction, and the stator magnet interacts with the first energized coil to drive the first mover assembly to reciprocate in a plane perpendicular to the first direction.

[0013] Optionally, at least two of the stator magnets have polarity arrangements that are perpendicular to each other.

[0014] Optional, also includes:

[0015] A first elastic element, comprising a surrounding body and a plurality of elastic arms extending from the surrounding body, the surrounding body being connected to the first mounting base;

[0016] Multiple suspension wires are arranged along the first direction, with one end of each suspension wire connected to the end of any of the elastic arms away from the surrounding body, and the other end connected to the seat.

[0017] Optionally, the lens further includes a solid-state lens and a fluid lens, wherein the first moving part assembly is used to fix the solid-state lens;

[0018] The mover assembly further includes a second mover assembly, which includes a second mounting base and a second energized coil connected to the second mounting base. The second mounting base is used to connect to the fluid lens, and the second energized coil is connected to the drive chip. The second energized coil interacts with the stator magnet to drive the second mover assembly to reciprocate along the first direction.

[0019] Optionally, the second energized coil includes a first lead end and a second lead end, and the driving chip includes a first pin and a second pin, wherein the first pin is connected to the first lead end and the second pin is connected to the second lead end.

[0020] Optionally, the second mounting base includes a second surrounding wall, which surrounds a portion of the first mounting base. The second energized coil is surrounded on the outside of the second surrounding wall, and the stator magnet is disposed on the side of the second energized coil opposite to the second surrounding wall. The axial direction of the second energized coil is parallel to the first direction.

[0021] Optionally, the number of stator magnets is even and they are arranged in pairs opposite each other, with the second energized coil located between the two oppositely arranged stator magnets.

[0022] Optionally, the second mounting base includes a second surrounding wall and a plurality of protrusions. The plurality of protrusions extend from the second surrounding wall in a direction away from the bottom of the base body. The plurality of protrusions are evenly arranged around the first direction, and each of the protrusions is used for connection of the fluid lens.

[0023] Optional, also includes:

[0024] A first elastic element group, the first elastic element group includes a plurality of first elastic elements, one end of each first elastic element is connected to the second mounting base, and the other end is connected to the base body in a direction perpendicular to the first direction;

[0025] The second elastic element group is arranged at intervals with the first elastic element group along the first direction. The second elastic element group includes a plurality of second elastic elements. One end of each second elastic element is connected to the second mounting base, and the other end is connected to the base body in a direction perpendicular to the first direction.

[0026] Optionally, the first mounting base includes a first surrounding wall and an extension extending outward from the first surrounding wall, the first surrounding wall being used to surround and connect to the lens, and the coil circuit board being stacked with the extension.

[0027] Optionally, a Hall sensor is also included, which is disposed on the coil circuit board and is connected to the driver chip.

[0028] The driving chip is used to obtain the magnetic field strength sensed by the Hall sensor in order to obtain the relative positional relationship between the stator magnet and the first mover assembly.

[0029] Optionally, the driver chip includes a third pin and a fourth pin, which are used to enable communication between the Hall sensor and an external processor.

[0030] Optionally, the stator magnet interacts with the first energized coil to drive the mover assembly to reciprocate in a plane perpendicular to the first direction;

[0031] The Hall sensor includes a first Hall sensor and a second Hall sensor, each corresponding to a stator magnet. The polarity arrangement direction of the stator magnet corresponding to the first Hall sensor is perpendicular to the polarity arrangement direction of the stator magnet corresponding to the second Hall sensor.

[0032] Optionally, multiple stator magnets are spaced apart around a first direction, and the coil circuit board includes multiple first energized coils, with each of the multiple stator magnets and the multiple first energized coils corresponding to one another.

[0033] The magnetic pole arrangement of the stator magnet is parallel to the first direction, and the axial direction of the first energized coil is parallel to the first direction. The stator magnet and the first energized coil interact to drive the first mover assembly to reciprocate along the first direction.

[0034] Optionally, the driver chip further includes a fifth pin and a sixth pin, wherein the fifth pin is used to connect to the positive terminal of the external power supply circuit, and the sixth pin is used to connect to the negative terminal of the external power supply circuit.

[0035] Optionally, the seat includes:

[0036] The cover includes a receiving cavity;

[0037] A base is connected to the cover to close one end of the receiving cavity. The mover assembly and the stator magnet are both located within the receiving cavity closed by the base. The base includes a snap-fit ​​part that snaps into the stator magnet.

[0038] According to a second aspect of the present disclosure, a camera module is provided, comprising:

[0039] An actuator as described in any of the above embodiments;

[0040] A lens, which is assembled on the base of the actuator and connected to the mover assembly.

[0041] According to a third aspect of the present disclosure, an electronic device is provided, including a camera module as described in any of the above embodiments.

[0042] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0043] As can be seen from the above embodiments, in the actuator disclosed herein, the driving chip is disposed inside the actuator, and the driving chip and the first energized coil can be connected through the circuit burned inside the coil circuit board. Compared with the related technology, which sets the driving chip independently from the actuator and requires multiple pins to be led out from the actuator to connect with the driving chip, the technical solution of this disclosure does not require the first energized coil and the driving chip to conduct electricity through pins, thus reducing the difficulty of the process.

[0044] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0045] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0046] Figure 1 This is a cross-sectional schematic diagram of an actuator according to an exemplary embodiment.

[0047] Figure 2 This is a schematic diagram illustrating the relative positional relationship between a stator magnet and a first energized coil according to an exemplary embodiment.

[0048] Figure 3 This is a schematic diagram illustrating another relative positional relationship between a stator magnet and a first energized coil according to an exemplary embodiment.

[0049] Figure 4 This is a top view of a camera module according to an exemplary embodiment.

[0050] Figure 5 yes Figure 4 A schematic diagram of the CC cross-section of the camera module.

[0051] Figure 6 yes Figure 4 An exploded view of the camera module.

[0052] Figure 7 This is a top view of a fluid lens according to an exemplary embodiment. Detailed Implementation

[0053] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0054] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0055] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0056] Figure 1 This is a schematic cross-sectional view of an actuator 100 according to an exemplary embodiment. Figure 1 As shown, the actuator 100 may include a base 1, a stator magnet 2, a mover assembly 3, and a drive chip 4. The stator magnet 2, the mover assembly 3, and the drive chip 4 can all be disposed inside the base 1, and the stator magnet 2 can be connected to the inner wall of the base 1 so that the stator magnet 2 is fixedly connected to the base 1 and the two can maintain a stable relative positional relationship. The mover assembly 3 is movably disposed within the base 1, and the mover assembly 3 may include a coil circuit board 31, which may include a first energized coil 311. A drive chip 4 may be disposed on the coil circuit board 31, and the drive chip 4 may be connected to the first energized coil 311 through a circuit burned inside the coil circuit board 31. The drive chip 4 may be electrically connected to an external power supply circuit, so that the electrical signal provided by the external power supply circuit may be used to power the first energized coil 311 through the drive chip 4. The energized first energized coil 311 interacts with the stator magnet 2 to generate a force acting on the mover assembly 3, and the mover assembly 3 may be driven to move relative to the stator magnet through the action of this force.

[0057] When the actuator 100 is configured to a camera module, the lens of the camera module can be connected to the moving part 3. This allows the lens position to be adjusted by the movement of the moving part 3, which is beneficial for achieving the focusing or image stabilization functions of the camera module. Furthermore, in the actuator 100, the driving chip 4 is located inside the actuator 100, and the driving chip 4 and the first energized coil 311 can be connected via circuitry burned inside the coil circuit board 31. Compared to related technologies where the driving chip 4 is set independently of the actuator 100, requiring multiple pins to be led out from inside the actuator 100 to connect with the driving chip 4, the technical solution disclosed in this disclosure does not require pins for conduction between the first energized coil 311 and the driving chip 4. This reduces the number of pins on the driving chip 4, thereby reducing the number of terminals led out from the actuator 100 and lowering the manufacturing complexity.

[0058] In some embodiments, the actuator 100 may include a single actuator component 3, such as... Figure 1As shown, the actuator assembly 3 includes a first actuator assembly 32, which may include a first mounting base 321 and a coil circuit board 31. The first mounting base 321 is movably disposed within the base 1 and can be used to fix the lens of the camera module of the actuator 100. The coil circuit board 31 can be arranged around a first direction (e.g., Figure 1 The coil circuit board 31 (in the direction indicated by arrow A) is positioned on the first mounting base 321, and the coil circuit board 31 can be positioned toward either end of the stator magnet 2 in the first direction, for example, in... Figure 1 As shown, the coil circuit board 31 can be located below the stator magnet 2. Based on this, when the first energized coil 311 of the coil circuit board 31 interacts with the stator magnet 2, it can drive the first moving part 32 to reciprocate in a plane perpendicular to the first direction. When the first direction is the optical axis direction of the camera module on which the actuator 100 is configured, the reciprocating translation of the first moving part 32 in a plane perpendicular to the first direction can realize the image stabilization function of the camera module; or, through the interaction between the first energized coil 311 and the stator magnet 2, it can drive the first moving part 32 to reciprocate along the first direction. When the first direction is the optical axis direction of the camera module on which the actuator 100 is configured, the focusing function of the camera module can be realized.

[0059] For example, the first mounting base 321 may include a first surrounding wall 3211 and an extension 3212 extending outward from the first surrounding wall 3211. The first surrounding wall 3211 can be used to assemble the lens of a camera module. For example, the lens can be inserted into the first surrounding wall 3211. The coil circuit board 31 can be stacked with the extension 3212 so that the extension 3212 carries the coil circuit board 31, realizing the installation of the coil circuit board 31. Keeping the coil circuit board 31 from being outside the first surrounding wall 3211 facilitates the assembly of electronic components on the coil circuit board 31 and helps avoid interference between electronic components and other parts of the actuator 100. Figure 1 In the illustrated embodiment, the coil circuit board 31 is arranged around the outside of the first mounting base 321 as an example. In other embodiments, the coil circuit board 31 is arranged in a ring shape inside the first mounting base 321. This disclosure does not limit this.

[0060] Regarding the case described in the above embodiments where the actuator 100 includes a single moving part 3, and the first moving part 32 reciprocates along the first direction or translates in a plane perpendicular to the first direction, the following will provide a detailed explanation.

[0061] In some cases, the actuator 100 may include a plurality of stator magnets 2, which may be spaced apart around the periphery of the first mounting base 321 in a first direction. The coil circuit board 31 may include a plurality of first energized coils 311, and the plurality of first energized coils 311 and the plurality of stator magnets 2 are arranged in a one-to-one correspondence, for example... Figure 2 As shown, each stator magnet 2 and its corresponding first energized coil 311 can be arranged along a first direction. Here, still using... Figure 2 As shown, the magnetic pole arrangement direction of each stator magnet 2 is perpendicular to the first direction, and the axis of each first energized coil 311 is parallel to the first direction. Based on this, when any first energized coil 311 is energized, the first energized coil 311 can interact with the corresponding stator magnet 2 and generate an Ampere force. This Ampere force has a component perpendicular to the first direction. The component of the Ampere force parallel to the first direction can be limited by other structures (which will be explained later), thereby allowing the first mover assembly 32 to reciprocate in a plane perpendicular to the first direction. It is understandable that the first moving component 32 may need to move to different positions within a plane to achieve anti-jitter. The position of the first moving component 32 within a plane can be represented by displacement in two mutually perpendicular directions within that plane. Therefore, to drive the first moving component 32 to generate displacement in two mutually perpendicular directions within the plane, the polarity arrangement of at least two of the multiple stator magnets 2 can be set to perpendicular. Based on this, the first moving component 32 can be subjected to two forces located in the same plane and perpendicular to each other, thereby driving the first moving component 32 to move to various positions within the plane. By changing the direction of the current in the first energized coil 311, the direction of the force can be changed, thus realizing the forward and backward movement of the first moving component 32. By changing the magnitude of the current in the first energized coil 311, the magnitude of the force acting on the first moving component 32 can be adjusted, thereby achieving fine-tuning.

[0062] In other cases, the actuator 100 may include a plurality of stator magnets 2, which may be spaced apart around the periphery of the first mounting base 321 in a first direction. The coil circuit board 31 may include a plurality of first energized coils 311, and the plurality of first energized coils 311 and the plurality of stator magnets 2 are arranged in a one-to-one correspondence, for example... Figure 3 As shown, each stator magnet 2 and its corresponding first energized coil 311 can be arranged along a first direction. Here, still using... Figure 3As shown, the magnetic pole arrangement of the stator magnet 2 is parallel to the first direction, and the axis of the first energized coil 311 is also parallel to the first direction. Therefore, the magnetic field generated when the first energized coil 311 is energized can interact with the magnetic field of the stator magnet 2. Utilizing the principle of repulsion between like poles and attraction between opposite poles, the first moving part 32 is driven to reciprocate in the first direction, thus enabling the focusing function of the camera module equipped with this actuator 100. Of course, to achieve smooth movement of the first moving part 32, the number of stator magnets 2 can be even, and they are arranged in pairs facing each other. Thus, when the two opposing first energized coils 311 carry current in the same direction, the interaction between the two first energized coils 311 and the corresponding stator magnet 2 generates a force in the same direction, which is beneficial for the smooth movement of the first moving part 32 along the first direction, preventing the first moving part 32 from tilting and affecting the shooting effect. Changing the direction of the current in the first energized coil 311 can change the direction of the force, thereby enabling the first moving part 32 to move smoothly in the first direction. Figure 3 The upward or downward movement of the first moving part 32 can be adjusted by changing the current in the first energized coil 311, thereby enabling fine-tuning.

[0063] In the above embodiments, the actuator 100 includes a single moving part component 3, which can subsequently implement the focusing or image stabilization function of the camera module configured with the actuator 100. In other embodiments, the actuator 100 may also include multiple moving part components 3, so that the camera module configured with the actuator 100 can simultaneously have focusing and image stabilization functions. Below, to illustrate this technical solution in detail, taking an embodiment where the actuator 100 is configured within a camera module as an example, the structure of the actuator 100 and the connection relationship between the actuator 100 and the lens will be described in detail.

[0064] like Figures 4-6As shown, the actuator 100 may include a first actuator assembly 32 and a second actuator assembly 33. The lens of the camera module 200 may include a solid-state lens 202 and a fluid lens 201, with the optical axis directions of the solid-state lens 202 and the fluid lens 201 being a first direction. The first actuator assembly 32 is connected to the solid-state lens 202, and the second actuator assembly 33 is connected to the fluid lens 201. The fluid lens 201 may be a liquid lens or a gas lens, and this disclosure does not limit this. Thus, by driving the solid-state lens 202 to move in a plane perpendicular to the first direction through the first actuator assembly 32, image stabilization is achieved. By adjusting the curvature of the fluid lens 201 through the movement of the second actuator assembly 33 in the first direction, focusing is achieved. In this technical solution, by moving the solid-state lens 202 through the first actuator assembly 32 and adjusting the curvature of the fluid lens 201 through the second actuator assembly 33, the focusing and image stabilization functions of the camera module 200 can be achieved independently, avoiding mutual interference between the focusing and image stabilization processes, which is beneficial for improving image quality.

[0065] In this embodiment, the first moving part assembly 32 may include a first mounting base 321 and a coil circuit board 31. The first mounting base 321 is movably disposed within the base body 1 and can be used to connect to the solid-state lens 202; the coil circuit board 31 can be circumferentially arranged in a first direction (e.g., Figure 1 The coil circuit board 31 (in the direction indicated by arrow A) is located on the outside of the first mounting base 321, and the coil circuit board 31 can be positioned towards any end of the stator magnet 2 in the first direction. The actuator 100 may also include multiple stator magnets 2, and the coil circuit board 31 may include multiple first energized coils 311, with each of the multiple first energized coils 311 and the multiple stator magnets 2 corresponding to each other. The magnetic pole arrangement direction of the stator magnet 2 is perpendicular to the first direction, and the axial direction of the first energized coil 311 is parallel to the first direction. Based on this, when the first energized coil 311 of the coil circuit board 31 interacts with the stator magnet 2, it can drive the first moving part assembly 32 to reciprocate in a plane perpendicular to the first direction. Through the reciprocating translation of the first moving part assembly 32 in a plane perpendicular to the first direction, the image stabilization function of the camera module 200 can be realized.

[0066] The second moving part assembly 33 may include a second mounting base 331 and a second energized coil 332 connected to the second mounting base 331. The second mounting base 331 can be used to connect and fix to the fluid lens 201. The second energized coil 332 can be connected to the driving chip 4. When the second energized coil 332 is energized and interacts with the stator magnet 2, it can drive the second moving part assembly 33 to reciprocate in a first direction, thereby realizing the focusing function of the camera module 200. For example, the second energized coil 332 may include a first lead end and a second lead end. The driving chip 4 includes a first pin and a second pin. The first pin is connected to the first lead end, and the second pin is connected to the second lead end, thereby realizing that current is input from the first lead end or the second lead end of the second energized coil 332 and output from the other end, realizing energization.

[0067] The implementation of image stabilization in camera module 200 will be explained in detail below:

[0068] The first mounting base 321 may include a first surrounding wall 3211 and an extension 3212 extending outward from the first surrounding wall 3211. The first surrounding wall 3211 can be used to assemble the solid-state lens 202 of the camera module 200. For example, the solid-state lens 202 can be inserted into the first surrounding wall 3211. The coil circuit board 31 can be stacked with the extension 3212 so that the extension 3212 can support the coil circuit board 31 and realize the installation of the coil circuit board 31. The actuator 100 may include a plurality of stator magnets 2 disposed toward the extension 3212, such as a first stator magnet 212, a second stator magnet 222, a third stator magnet 232 and a fourth stator magnet 242. The first stator magnet 212, the second stator magnet 222, the third stator magnet 232 and the fourth stator magnet 242 may be disposed at intervals around the periphery of the first mounting base 321 in a first direction. The coil circuit board 31 may include four first energized coils 311, which may be disposed one-to-one with the first stator magnet 212, the second stator magnet 222, the third stator magnet 232 and the fourth stator magnet 242.

[0069] In this embodiment, the first stator magnet 212 and the third stator magnet 232 are arranged opposite to each other, and the second stator magnet 222 and the fourth stator magnet 242 are arranged opposite to each other. The polarity arrangement direction of the first stator magnet 212 is perpendicular to the polarity arrangement direction of the second stator magnet 222 and the fourth stator magnet 242, and parallel to the polarity arrangement direction of the third stator magnet 232. This allows the first mover assembly 32 to translate in a plane perpendicular to the first direction. Of course, this description only uses four stator magnets 2 (first stator magnet 212, second stator magnet 222, third stator magnet 232, and fourth stator magnet 242) as an example. In other embodiments, the actuator 100 may also include other numbers of stator magnets 2, and this disclosure does not limit this.

[0070] Furthermore, due to the separation of the forces generated by the interaction between the stator magnet 2 and the first energized coil 311, in addition to being perpendicular to the first direction, a force parallel to the first direction can also be generated to prevent the first mover assembly 32 from moving along the first direction. The actuator 100 may also include a first elastic element 71 and multiple suspension wires 6 arranged along the first direction, for example in... Figure 4 In the illustrated embodiment, the actuator 100k includes four suspension wires 6. The first elastic element 71 may include a surrounding body 51 and a plurality of elastic arms 52 extending from the surrounding body 51. The surrounding body 51 is connected to the first mounting base 321. Each elastic arm 52 extends outward from the surrounding body 51. One end of each suspension wire 6 is connected to the end of any elastic arm 52 away from the surrounding body 51, and the other end is connected to the bottom of the base 1. Thus, by adjusting the stiffness of the plurality of suspension wires 6 in the first direction, the movement of the first mover assembly 32 in the first direction can be suppressed. Of course, the structure of the first elastic element 71 and the suspension wires 6 can also be applied to... Figure 2 In the illustrated embodiment, the structure of the first mounting base 321 and the arrangement of the stator magnet 2 can also be applied to... Figure 2 The illustrated embodiment.

[0071] The following will provide a detailed explanation of how the focusing function of the camera module 200 is implemented:

[0072] The second mounting base 331 may include a second surrounding wall 3311, which may surround a portion of the first mounting base 321. For example, the second surrounding wall 3311 may surround the outside of the first surrounding wall 3211. The second energized coil 332 surrounds the outside of the second surrounding wall 3311. Both the second surrounding wall 3311 and the second energized coil 332 are located above the extension 3212 of the first mounting base 321. The first stator magnet 212, the second stator magnet 222, the third stator magnet 232, and the fourth stator magnet 242 are all disposed on the side of the second energized coil 332 away from the second surrounding wall 3311. That is, the stator magnet 212 and the second energized coil 332 may be nested in a direction perpendicular to the first direction, and the axial direction of the second energized coil 332 is parallel to the first direction. Based on this, the first stator magnet 212 interacts with the portion of the second energized coil 332 near the first stator magnet 212, generating a component force along the first direction; the second stator magnet 222 interacts with the portion of the second energized coil 332 near the first stator magnet 212, generating a component force along the first direction; the third stator magnet 232 interacts with the portion of the second energized coil 332 near the first stator magnet 212, generating a component force along the first direction; the fourth stator magnet 242 interacts with the portion of the second energized coil 332 near the first stator magnet 212, generating a component force along the first direction. This drives the second mounting base 331 to move along the first direction. Since the second mounting base 331 is connected to the fluid lens 201, when the second mounting base 331 moves along the first direction, it will act on the fluid inside the fluid lens 201, causing deformation, thereby adjusting the curvature of the fluid lens 201 and achieving focusing.

[0073] In this embodiment, to achieve the connection between the second mounting base 331 and the fluid lens 201, the second mounting base 331 may further include a plurality of protrusions 3312 extending from the second surrounding wall 3311 in a direction away from the bottom of the base body 1. These protrusions 3312 are evenly arranged around a first direction, and each protrusion 3312 is used to connect with the fluid lens 201. Furthermore, the combined action of the multiple evenly arranged protrusions 3312 can improve the uniformity of force on the fluid lens 201 and prevent deformation of the fluid lens 201 during installation. Figure 7As shown, the fluid lens 201 may include a fixed frame 2011, a diaphragm 2012, and a movable piece 2013. The diaphragm 2012 is connected to the fixed frame 2011, and liquid or gas may be disposed between the diaphragm 2012 and the fixed frame 2011. The movable piece 2013 is connected to the diaphragm 2012 and is also connected to the boss 3312 of the second mounting base 331. Thus, when the second mounting base 331 moves toward or away from the fluid lens 201 in the first direction, the boss 3312 can push or pull the movement of the movable piece 2013, causing gas flow between the fixed frame 2011 and the diaphragm 2012, causing deformation, thereby adjusting the curvature of the fluid lens 201.

[0074] To achieve smooth movement of the second mover assembly 33, the number of stator magnets 2 can be even, and they are arranged in pairs opposite each other. The second energized coil 332 is located between two opposite stator magnets 2, for example, in... Figure 4 The second energized coil 332 is located between the first stator magnet 212 and the third stator magnet 232, and also between the second stator magnet 222 and the fourth stator magnet 242. Thus, when the second energized coil 332 is energized, the opposing stator magnets 2 and 332 interact, generating forces in the same direction. This facilitates the smooth movement of the second rotor assembly 33 along the first direction, preventing the first rotor assembly 32 from tilting and affecting the shooting effect.

[0075] Of course, since the interaction between the stator magnet 2 and the second energized coil 332 generates a force perpendicular to the first direction in addition to the force along the first direction, in order to limit the movement of the second mover assembly 33 in a plane perpendicular to the first direction, the actuator 100 may also include a first elastic element group 7 and a second elastic element group 8. The first elastic element group 7 includes a plurality of first elastic elements 71, one end of each first elastic element 71 is connected to the second mounting base 331, and the other end is connected to the base 1 in a direction perpendicular to the first direction; the second elastic element group and the first elastic element group are spaced apart along the first direction, and the second elastic element group may include a plurality of second elastic elements 81, one end of each second elastic element 81 is connected to the second mounting base 331, and the other end is connected to the base 1 in a direction perpendicular to the first direction. For example, in Figure 4 In the embodiment shown, the first elastic element group 7 may include four first elastic elements 71, and the second elastic element group 8 may include four second elastic elements 81. Through the action of the four first elastic elements 71 and the second elastic elements 81, the component force perpendicular to the first direction generated by the stator magnet 2 and the second energized coil 332 can be absorbed, thereby preventing the second moving part assembly 33 from moving in the plane perpendicular to the first direction.

[0076] exist Figures 4-6In the illustrated embodiment, the actuator 100 may further include a Hall sensor 9, which can be disposed on the coil circuit board 31. The Hall sensor 9 can be connected to the driver chip 4 via circuitry burned into the coil circuit board 31. This avoids designing pins on the driver chip 4 for powering and communicating with the Hall sensor 9, thus reducing the number of pins on the driver chip 4. Since the Hall sensor 9 is disposed on the coil circuit board 31 and can move with the first moving part assembly 32, the relative positional relationship between the Hall sensor 9 and the stator magnet 2 changes, and the magnetic field strength that the Hall sensor 9 can sense also changes accordingly. Therefore, the driver chip 4 can determine the relative positional relationship between the stator magnet 2 and the first moving part assembly 32 based on the magnetic field strength sensed by the Hall sensor 9. In order to send the magnetic field strength sensed by the Hall sensor 9 obtained by the drive chip 4 to the external processor so that the external processor can understand the relative positional relationship between the stator magnet 2 and the first mover assembly 32, the drive chip 4 may also include a third pin and a fourth pin. The third pin and the fourth pin can be brought out to the outside of the actuator 100 for communication with the external processor.

[0077] It is understood that the first moving component 32 moves in a plane perpendicular to the first direction, and therefore the position of the first moving component 32 can be represented by displacement in two mutually perpendicular directions. Therefore, to obtain the displacement in two mutually perpendicular directions within the plane perpendicular to the first direction, the Hall sensor 9 may include a first Hall sensor 91 and a second Hall sensor 92. The first Hall sensor 91 and the second Hall sensor 92 are respectively configured to correspond to a stator magnet 2, and the polarity arrangement direction of the stator magnet 2 corresponding to the first Hall sensor 91 is perpendicular to the polarity arrangement direction of the stator magnet 2 corresponding to the second Hall sensor 92. Based on this, through the interaction between the stator magnet 2 with mutually perpendicular polarity arrangement directions and the corresponding first energized coil 311, the first moving component 32 can be driven to generate displacement in two mutually perpendicular directions within the plane. Simultaneously, during the movement, the magnetic field strength sensed by the first Hall sensor 91 and the second Hall sensor 92 will change, and the current position of the first moving component 32 can be obtained based on the change in magnetic field strength.

[0078] In some embodiments, one or more Hall sensors 9 of the actuator 100 may also be disposed on the second moving part 33 and all of them are connected to the driving chip 4. The one or more Hall sensors 9 can move with the second moving part 33, thereby the driving chip 4 can obtain the magnetic field strength sensed by the Hall sensors 9 and determine the relative positional relationship between the stator magnet 2 and the second moving part 33.

[0079] Of course, in the above embodiments, Figures 4-6 The actuator 100 shown includes a Hall sensor 9 as an example for illustration. In fact, in... Figure 2 and Figure 3 The actuator 100 shown in the embodiment may also include one or more Hall sensors 9, which may be disposed on the coil circuit board 31. Each Hall sensor 9 can be connected to the drive chip 4 through the internal circuit of the coil circuit board 31, so that the drive chip 4 can be based on the relative positional relationship between the stator magnet 2 and the first mover assembly 32.

[0080] In the above embodiments, to enable the driver chip 4 to conduct with the external power supply circuit, the driver chip 4 may further include a fifth pin and a sixth pin. The fifth pin can be connected to the positive terminal of the external power supply circuit, and the sixth pin can be connected to the negative terminal of the external power supply circuit. Thus, the electrical signal from the external power supply circuit can be input through the fifth pin and output through the sixth pin. Figures 4-6 Taking the illustrated embodiment as an example, the driver chip 4 may include a first pin and a second pin connected to the second energized coil 332, a third pin and a fourth pin connected to the Hall sensor 9, and a fifth pin and a sixth pin connected to an external power supply circuit. In other words, in Figures 4-6 In this embodiment, the driver chip 4 leads out six pins to the outside of the actuator 100, which enables the focusing and image stabilization functions of the camera module 200 configured with the actuator 100, and also enables closed-loop feedback during image stabilization. Compared to related technologies where the driver chip 4 is located on an external circuit board, and the actuator 100 leads out two pins of the second energized coil 332, two pins of each of the two radially perpendicular first energized coils 311, and four pins of each of the two Hall sensors 9 for image stabilization, totaling at least 14 pins, the number of pins of the driver chip 4 can be reduced.

[0081] In the above embodiments, the fixing frame 2011 of the fluid lens 201 can be fixedly connected to the base 1. The base 1 can include a cover 11 and a base 12. The cover 11 can include a receiving cavity 111. The base 12 is assembled on the cover 11 to close the receiving cavity 111. The stator magnet 2, the mover assembly 3 and the drive chip 4 are all located in the receiving cavity 111 closed by the base 12. The base 12 can include a snap-fit ​​part 121. The snap-fit ​​part 121 can snap-fit ​​with the stator magnet 2 to realize the fixed connection between the stator magnet 2 and the base 1. Moreover, it avoids setting a special bracket for the stator magnet 2, which helps to simplify the internal structure of the actuator 100. The fluid lens 201 can be connected to the inner wall of the base 1, or the base 1 can also include a fixed bracket 13, which is connected to the cover 11. The fluid lens 201 is assembled in the fixed bracket 13 and the fixed frame 2011 of the fluid lens 201 is connected to the fixed bracket 13, thereby realizing the assembly between the fluid lens 201 and the base 1.

[0082] Based on the technical solution of this disclosure, this disclosure also provides an electronic device, which may include one or more camera modules 200 as described in the above embodiments, and image information can be acquired through the camera module 200.

[0083] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0084] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An actuator, characterized in that, include: seat body; A stator magnet, the stator magnet being located within the base body and connected to the base body; A mover assembly, the mover assembly including a coil circuit board, the coil circuit board including a first energized coil, the first energized coil and the stator magnet interact to drive the mover assembly to move relative to the stator magnet; A driver chip is disposed on the coil circuit board and is connected to the first energized coil. The driver chip is used to connect to an external power supply circuit to supply power to the first energized coil. The moving part assembly includes a first moving part assembly and a second moving part assembly. The first moving part assembly is used to fix a solid-state lens. The stator magnet interacts with the first energized coil to drive the first moving part assembly to reciprocate in a plane perpendicular to the first direction. The second moving part assembly is used to fix a fluid lens. The second moving part assembly includes a second energized coil that is connected to the driving chip. The driving chip supplies power to the second energized coil. When the second energized coil is energized, it interacts with the stator magnet to drive the second moving part assembly to reciprocate in the first direction. The first moving part assembly includes a first mounting base. The second moving part assembly includes a second mounting base. The second mounting base is disposed around a portion of the first mounting base and spaced apart from the first mounting base.

2. The actuator according to claim 1, characterized in that, The coil circuit board is disposed on the first mounting base around the first direction and is disposed toward either end of the stator magnet in the first direction.

3. The actuator according to claim 2, characterized in that, Multiple stator magnets are spaced apart around a first direction, and the coil circuit board includes multiple first energized coils, with each of the multiple stator magnets and the multiple first energized coils corresponding to one another. Wherein, the magnetic pole arrangement direction of the stator magnet is perpendicular to the first direction, the axis of the first energized coil is parallel to the first direction, and the stator magnet interacts with the first energized coil to drive the first mover assembly to reciprocate in a plane perpendicular to the first direction.

4. The actuator according to claim 3, characterized in that, At least two of the stator magnets have polarity orientations that are perpendicular to each other.

5. The actuator according to claim 3, characterized in that, Also includes: A first elastic element, comprising a surrounding body and a plurality of elastic arms extending from the surrounding body, the surrounding body being connected to the first mounting base; Multiple suspension wires are arranged along the first direction, with one end of each suspension wire connected to the end of any of the elastic arms away from the surrounding body, and the other end connected to the seat.

6. The actuator according to claim 2 or 3, characterized in that, The second mounting base is connected to the second energized coil.

7. The actuator according to claim 6, characterized in that, The second energized coil includes a first lead end and a second lead end, and the driving chip includes a first pin and a second pin, wherein the first pin is connected to the first lead end and the second pin is connected to the second lead end.

8. The actuator according to claim 6, characterized in that, The second mounting base includes a second surrounding wall that surrounds a portion of the first mounting base. The second energized coil is surrounded on the outside of the second surrounding wall. The stator magnet is disposed on the side of the second energized coil opposite to the second surrounding wall. The axial direction of the second energized coil is parallel to the first direction.

9. The actuator according to claim 8, characterized in that, The number of stator magnets is even and they are arranged in pairs opposite each other, with the second energized coil located between the two oppositely arranged stator magnets.

10. The actuator according to claim 6, characterized in that, The second mounting base includes a second surrounding wall and a plurality of protrusions. The plurality of protrusions extend from the second surrounding wall in a direction away from the bottom of the base body. The plurality of protrusions are evenly arranged around the first direction. Each of the protrusions is used for connection of the fluid lens.

11. The actuator according to claim 6, characterized in that, Also includes: A first elastic element group, the first elastic element group includes a plurality of first elastic elements, one end of each first elastic element is connected to the second mounting base, and the other end is connected to the base body in a direction perpendicular to the first direction; The second elastic element group is arranged at intervals with the first elastic element group along the first direction. The second elastic element group includes a plurality of second elastic elements. One end of each second elastic element is connected to the second mounting base, and the other end is connected to the base body in a direction perpendicular to the first direction.

12. The actuator according to any one of claims 2-5, characterized in that, The first mounting base includes a first surrounding wall and an extension extending outward from the first surrounding wall. The first surrounding wall is used to surround and connect to the lens, and the coil circuit board is stacked with the extension.

13. The actuator according to any one of claims 2-5, characterized in that, It also includes a Hall sensor, which is disposed on the coil circuit board and is connected to the driver chip. The driving chip is used to obtain the magnetic field strength sensed by the Hall sensor in order to obtain the relative positional relationship between the stator magnet and the first mover assembly.

14. The actuator according to claim 13, characterized in that, The driver chip includes a third pin and a fourth pin, which are used to enable communication between the Hall sensor and an external processor.

15. The actuator according to claim 13, characterized in that, The stator magnet interacts with the first energized coil, driving the mover assembly to reciprocate in a plane perpendicular to the first direction; The Hall sensor includes a first Hall sensor and a second Hall sensor, each corresponding to a stator magnet. The polarity arrangement direction of the stator magnet corresponding to the first Hall sensor is perpendicular to the polarity arrangement direction of the stator magnet corresponding to the second Hall sensor.

16. The actuator according to claim 2, characterized in that, Multiple stator magnets are spaced apart around a first direction, and the coil circuit board includes multiple first energized coils, with each of the multiple stator magnets and the multiple first energized coils being arranged in a one-to-one correspondence. The magnetic pole arrangement of the stator magnet is parallel to the first direction, and the axial direction of the first energized coil is parallel to the first direction. The stator magnet and the first energized coil interact to drive the first mover assembly to reciprocate along the first direction.

17. The actuator according to claim 1, characterized in that, The driver chip includes a fifth pin and a sixth pin. The fifth pin is used to connect to the positive terminal of an external power supply circuit, and the sixth pin is used to connect to the negative terminal of the external power supply circuit.

18. The actuator according to claim 1, characterized in that, The base includes: The cover includes a receiving cavity; A base is connected to the cover to close one end of the receiving cavity. The mover assembly and the stator magnet are both located within the receiving cavity closed by the base. The base includes a snap-fit ​​part that snaps into the stator magnet.

19. A camera module, characterized in that, include: The actuator as described in any one of claims 1-18; A lens, which is assembled on the base of the actuator and connected to the mover assembly.

20. An electronic device, characterized in that, Includes the camera module as described in claim 19.

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