Actuating device, periscopic camera module and mobile terminal

Abstract

The utility model relates to an actuating device, a periscopic camera module and a mobile terminal. The actuating device comprises a shell, an optical path turning element fixedly installed on the shell, an anti-shake compensation optical assembly achieving two-dimensional translational motion in the plane perpendicular to the optical axis through an electromagnetic driving mechanism, and an axial focusing optical assembly conducting axial displacement in the optical axis direction through a linear driving mechanism. The light path turning element, the anti-shake compensation optical assembly and the axial focusing optical assembly are sequentially arranged in the direction of the optical axis. According to the utility model, the three-dimensional motion control capability of the optical system is realized through an innovative periscopic optical path architecture, and the problems of slow response speed, high energy loss, large structure thickness, difficult driving and the like in the prior art are solved; according to the arrangement mode of fixing the light path turning element and the anti-shake compensation assembly, the rotational inertia of a traditional prism rotating structure is remarkably reduced, the response speed of optical compensation action is higher, and energy loss is lower.

Description

Technical Field

[0001] This utility model relates to the field of optical equipment technology, specifically to an actuation device with an innovative periscope optical path architecture that enables three-dimensional motion control of an optical system, as well as a periscope camera module and mobile terminal having the actuation device. Background Technology

[0002] In today's optical imaging field, especially in mobile devices (such as smartphones and tablets), the requirements for optical imaging quality and device slimness are becoming increasingly stringent. Traditional optical image stabilization and focusing technologies have many shortcomings.

[0003] Traditional prism rotation structures used for optical image stabilization suffer from slow response times due to their large moment of inertia, resulting in high energy loss during operation and impacting stabilization effectiveness and overall device performance. Furthermore, traditional solutions often integrate functional components, leading to severe motion coupling and a complex control system that struggles to precisely control individual functions.

[0004] Furthermore, as mobile devices become thinner and lighter, traditional optical structures, due to their overall thickness, cannot meet the stringent requirements of ultra-thin modules in mobile devices. Moreover, traditional prism solutions are too heavy, posing significant challenges to actuation and increasing energy consumption and equipment load. Therefore, a new actuation device is needed to address these issues. Utility Model Content

[0005] In view of this, the present invention provides an actuation device, a periscope camera module and a mobile terminal, which realizes the three-dimensional motion control capability of the optical system through an innovative periscope optical path architecture, and solves the problems of slow response speed, high energy loss, large structural thickness and driving difficulty in traditional technologies.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An actuation device includes a housing, an optical path deflection element fixedly mounted on the housing, an image stabilization compensation optical component that achieves two-dimensional translational motion in a plane perpendicular to the optical axis via an electromagnetic drive mechanism, and an axial focusing optical component that performs axial displacement along the optical axis via a linear drive mechanism, wherein the optical path deflection element, the image stabilization compensation optical component, and the axial focusing optical component are arranged sequentially along the optical axis.

[0008] The innovative periscope-style optical path architecture enables three-dimensional motion control of the optical system. The arrangement of the fixed optical path folding element and the image stabilization compensation component significantly reduces the rotational inertia of traditional prism rotating structures, resulting in faster response speeds and lower energy consumption for optical compensation actions. The two-dimensional translational motion of the image stabilization compensation component and the longitudinal displacement of the axial focusing component form a complementary control dimension, eliminating image blur caused by lateral vibrations and achieving precise focus tracking. The sequential arrangement of these three components along the optical axis effectively compresses the overall structural thickness, making it particularly suitable for the stringent requirements of ultra-thin modules in mobile devices. This architecture completely solves the driving difficulties caused by the excessive mass of traditional prism solutions. Through motion decoupling design, each functional module only needs to complete a single degree of freedom of motion, significantly reducing the complexity of the control system.

[0009] Preferably, the electromagnetic drive mechanism is disposed around the image stabilization compensation optical component and includes at least two sets of spatially orthogonally arranged coil units and magnet units, providing planar driving force through unilateral magnetic field coupling.

[0010] A novel design employing spatially orthogonal drive unit groups coupled with a single-sided magnetic field achieves high-efficiency planar drive. The orthogonally arranged coil-magnet pairs form independent control channels in the X / Y axes, enabling arbitrary-direction vector drive while avoiding interference from multi-axis motion coupling. The single-sided magnetic field coupling design optimizes the magnetic circuit distribution, concentrating the effective magnetic field on the drive surface. Compared to traditional double-sided magnetic circuit schemes, this significantly reduces ineffective magnetic flux and improves magnetic field utilization. The symmetrical arrangement of the coil and magnet units ensures balanced driving torque while effectively suppressing eddy current losses during motion. This drive architecture is particularly suitable for high-frequency, low-amplitude vibration compensation scenarios. Its rapid response characteristics can accurately track high-frequency jitter signals from handheld devices, and its low-leakage magnetic field design helps reduce electromagnetic interference to surrounding precision electronic components.

[0011] Preferably, an orthogonal decoupling guide mechanism is provided between the image stabilization compensation optical component and the support member. The mechanism includes a first guide feature, a second guide feature, and a rolling element. The first guide feature is formed on the bearing surface of the support member and has a first extending direction. The second guide feature is formed on the mating surface of the image stabilization compensation optical component and has a second extending direction orthogonal to the first extending direction. The rolling element is located between the first guide feature and the second guide feature, forming a two-dimensional decoupling motion interface.

[0012] This guiding mechanism achieves high-precision decoupling of planar motion through an innovative combination of orthogonal raceways and rolling elements. The cross arrangement of the first and second guiding features decomposes the two-dimensional planar motion into two orthogonal linear degrees of freedom, each with its own independent rolling constraint mechanism ensuring motion accuracy. The distribution of the rolling elements within the cross guide grooves effectively disperses contact stress, reducing motion resistance compared to traditional sliding friction structures. The orthogonal raceway geometry ensures that the rolling elements maintain a uniform contact stress distribution throughout motion, improving motion smoothness and significantly extending the mechanism's service life. This decoupling mechanism also effectively isolates vibration transmission along different axes, maintaining excellent guiding accuracy even under complex motion conditions, making it particularly suitable for optical image stabilization systems requiring sub-micron positioning accuracy.

[0013] Preferably, the support member is disposed in the housing and located between the image stabilization compensation optical component and the optical path deflection element, the first guiding feature is formed on the surface of the support member facing the image stabilization compensation optical component, and the second guiding feature is formed on the surface of the image stabilization compensation optical component facing the support member.

[0014] This layout achieves a compact structure through functional integration design. The support component, acting as a transitional carrier between the optical path deflection element and the image stabilization assembly, serves both as an optical positioning reference and integrates key features of the guiding mechanism, significantly reducing the number of parts and assembly layers. The mirrored arrangement of the guiding features creates symmetrical mechanical support between the image stabilization assembly and the substrate, effectively improving system rigidity. This structural layout also completely isolates the electromagnetic drive unit from the optical elements in space, preventing heat generated by the drive mechanism from being directly conducted to the sensitive optical elements. The central position of the support component helps shorten the travel distance of the optical compensation assembly, achieving maximum compensation range within a limited space. The face-to-face arrangement of the guiding surfaces also facilitates modular assembly processes, significantly improving production efficiency and product consistency.

[0015] Preferably, the axial focusing optical assembly includes separable optical elements and a support frame, wherein the support frame forms an axial sliding fit with the housing through at least two guide posts.

[0016] This design achieves independent optimization of functional components through modular separation of optical elements and mechanical support. The separable structure allows for the selection of optical elements made of different materials according to optical performance requirements, while the support frame can utilize high-strength, lightweight materials to reduce moment of inertia. The arrangement of multiple guide columns forms a stable motion constraint system, effectively preventing tilting or deflection that may occur during focusing. As a guiding structure, the guide columns effectively maintain the perpendicularity between components, ensuring movement stability, reducing component wear and operating noise caused by perpendicularity deviations, and providing reliable guiding support for moving parts of the equipment. The precise fit between the guide columns and the sliding mating surfaces ensures axial movement accuracy and compensates for dimensional fluctuations caused by temperature changes through a reasonable clearance design. This structure also facilitates the implementation of active position feedback control; precise axial position information can be directly obtained by placing displacement sensors on the guide columns. The separable design also significantly simplifies the replacement and maintenance process of optical elements, significantly improving product maintainability while ensuring optical performance.

[0017] Preferably, the guide posts are evenly spaced along the circumference of the housing.

[0018] The circumferentially uniform distribution scheme creates an optimal mechanical support environment. The guide pillars, arranged at equal angles, form a symmetrical constraint force system around the moving components, effectively balancing the eccentric moments caused by anisotropic loads. This layout results in a more uniform distribution of contact stress in the sliding pairs, reducing the risk of localized wear and improving motion smoothness. The uniformly distributed guide pillars also form a stable motion reference frame, which helps eliminate the impact of assembly errors on motion accuracy. This design is particularly effective in handling thermal deformation caused by temperature changes, as the symmetrical structure effectively compensates for anisotropic dimensional variations. Under vibration conditions, circumferentially uniform support significantly increases the system's resonant frequency and enhances impact resistance. From a manufacturing process perspective, the symmetrical layout simplifies the establishment of machining references, which is beneficial for improving part machining accuracy and assembly efficiency.

[0019] Preferably, the coil unit has an adjustable current direction, so that the coil unit and the corresponding magnet unit can generate a variable electromagnetic force.

[0020] Bidirectional current control technology enables precise vector control of the driving force. By changing the direction of the coil current in real time, a push-pull bidirectional force can be generated on the same physical structure, significantly expanding the dynamic range of the driving force. This control method allows for closed-loop position control within a single drive unit, eliminating the need for additional passive components such as reset springs. The variable direction characteristic also supports the implementation of more complex control algorithms, such as preload compensation and nonlinear friction compensation. This design is particularly advantageous for achieving high-frequency response drive performance, as it can accurately track high-frequency vibration signals by rapidly switching the current direction. In terms of energy efficiency management, the bidirectional drive mode can automatically optimize the current phase according to the direction of motion, avoiding the ineffective power consumption problem of traditional unidirectional drives. This technology also provides a flexible foundation for multi-axis cooperative control, enabling complex motion trajectories through current phase difference control between different drive units.

[0021] Preferably, the shape of the coil unit is adapted to the magnetic field distribution of the corresponding magnet unit.

[0022] Shape-fit design maximizes the utilization of magnetic field energy; the coil can be elliptical, circular, or square. Optimizing the coil shape through 3D magnetic field simulation ensures its winding path closely matches the magnetic field lines of the magnet unit, significantly improving electromagnetic conversion efficiency. The specially shaped coil generates a more uniform driving force gradient, which is beneficial for improving position control resolution. This fit design also effectively suppresses edge magnetic field distortion, reducing electromagnetic interference to surrounding sensitive components. From a thermal management perspective, the optimized coil shape increases the heat dissipation surface area, and combined with a reasonable winding arrangement, it reduces the power density per unit volume. This design also allows for more effective windings to be arranged in a limited space, increasing driving force output without increasing volume. Shape-fit technology also enables the miniaturization of the drive system; through precise electromagnetic field matching, equivalent performance indicators can be achieved in a more compact space.

[0023] Preferably, the magnet unit adopts a magnetization configuration with optimized magnetic field distribution.

[0024] Customized magnetization technology creates an ideal working magnetic field environment. Through multi-pole magnetization or gradient magnetization processes, a specific magnetic field distribution pattern tailored to the driving requirements is formed within the magnet unit. This optimized magnetization significantly increases the magnetic flux density of the effective working air gap while reducing the attenuation gradient of the edge magnetic field. The special magnetization configuration also compensates for magnetic field distortion in the drive gap, ensuring linear force-current characteristics throughout the entire stroke. This technology allows for customization of magnetic circuit characteristics according to specific application scenarios; for example, using high-coercivity materials in applications requiring high-frequency response, and optimizing remanent magnetization distribution in applications requiring low power consumption. The optimized magnetic field distribution also reduces eddy current losses in the drive coil, improving overall system energy efficiency. From a manufacturing perspective, precise magnetization control reduces the difficulty of subsequent magnetic field calibration, improving product consistency and reliability.

[0025] A periscope camera module includes the actuation device as described above.

[0026] This camera module integrates an innovative actuation mechanism, achieving a breakthrough balance between optical and mechanical performance. The periscope architecture, combined with multi-dimensional active optical compensation technology, enables professional-grade optical image stabilization within a limited space. Innovative drive and control schemes give the module sub-pixel-level motion compensation accuracy, significantly improving image quality in low-light environments. The modular design allows for rapid adaptation to different optical components, greatly expanding the product's application range. The module also boasts excellent environmental adaptability; special thermal management design and electromagnetic shielding ensure stable operation across a wide temperature range and in complex electromagnetic environments. From a manufacturing perspective, the highly integrated structural design significantly reduces the number of parts, simplifies assembly, and improves mass production consistency.

[0027] A mobile terminal includes a terminal housing, a circuit board, and a periscope camera module as described above. The periscope camera module and the circuit board are both located inside the terminal housing. A light-transmitting window for light to pass through is provided on the terminal housing at a position opposite to the lens of the periscope camera module. The actuation device of the periscope camera module is electrically connected to the circuit board.

[0028] This mobile terminal integrates an advanced camera module, achieving the imaging capabilities of professional photography equipment. Its ultra-thin periscope structure is seamlessly integrated into the mobile device's ID design, providing optical zoom without increasing the device's thickness. Deep integration of the intelligent drive system with the terminal processor supports scene-recognition-based adaptive image stabilization algorithms. Special optical window materials and coating processes ensure excellent light transmittance while providing superior wear and stain resistance. The overall electromagnetic compatibility design ensures that the high-frequency drive signals of the camera module do not interfere with the operation of other radio frequency modules. The terminal also supports a multi-camera collaborative working mode, enabling more complex computational photography functions through the coordinated operation of the main camera and periscope lens. From a user experience perspective, the fast-response focusing system and stable image stabilization significantly improve the success rate of shooting, especially excelling in moving scenes and low-light environments.

[0029] The advantages of this utility model compared to the prior art are:

[0030] Fast response and low energy consumption: The arrangement of the fixed optical path folding element and the image stabilization compensation component significantly reduces the rotational inertia of the traditional prism rotation structure, resulting in faster response speed and lower energy consumption for optical compensation. This means that in practical applications, it can react more quickly to device shake, effectively reduce image blur, improve image quality, and at the same time reduce device power consumption and extend battery life.

[0031] Complementary control dimensions enable multi-functionality: the two-dimensional translational motion of the image stabilization compensation component and the longitudinal displacement of the axial focusing component form a complementary control dimension, which can eliminate image blur caused by lateral vibration and achieve precise focus tracking. During shooting, whether it is lateral shaking of the equipment or changes in the distance of the subject, the actuator can adjust in time to ensure that clear and accurate images are captured.

[0032] Compact design suitable for mobile devices: The arrangement of the three components along the optical axis effectively reduces the overall structural thickness, making it particularly suitable for the stringent requirements of ultra-thin modules in mobile devices. This compact design allows mobile devices to maintain a slim and lightweight appearance while incorporating a higher-performance optical system, enhancing product competitiveness.

[0033] Reduced driving difficulty and control system complexity: This architecture completely solves the driving difficulties caused by the excessive mass of traditional prism solutions. Through motion decoupling design, each functional module only needs to complete a single degree of freedom of motion, significantly reducing the complexity of the control system. This not only reduces hardware costs but also improves the reliability and stability of the system, facilitating manufacturing and subsequent maintenance. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a partial structural diagram of an actuation device according to an embodiment of the present invention.

[0036] Figure 2 This is an exploded view of an actuation device according to an embodiment of the present invention.

[0037] Figure 3 This is an exploded view of the actuation device according to an embodiment of the present invention from a second perspective.

[0038] Figure 4 This is an exploded view from a third perspective of an actuation device according to an embodiment of the present invention.

[0039] Figure 5 This is a structural diagram of an actuation device according to an embodiment of the present invention.

[0040] Figure 6 This is a schematic diagram of three magnetization configurations of a magnet unit according to an embodiment of the present invention.

[0041] Labeling: Housing (1), Support (11), Optical path deflection element (2), Anti-shake compensation optical assembly (3), Electromagnetic drive mechanism (31), Coil unit (311), Magnet unit (312), Orthogonal decoupling guide mechanism (32), First guide feature (321), Second guide feature (322), Rolling element (323), Axial focusing optical assembly (4), Linear drive mechanism (41), Linear coil unit (411), Linear magnet unit (412), Optical element (42), Support frame (43), Guide column (44). Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0044] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0046] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0047] This embodiment provides an actuation device, including a housing 1, an optical path folding element 2 fixedly installed in the housing 1, an image stabilization compensation optical component 3 that realizes two-dimensional translational motion in a plane perpendicular to the optical axis through an electromagnetic drive mechanism 31, and an axial focusing optical component 4 that makes axial displacement along the optical axis through a linear drive mechanism 41, wherein the optical path folding element 2, the image stabilization compensation optical component 3 and the axial focusing optical component 4 are arranged sequentially along the optical axis.

[0048] The innovative periscope-style optical path architecture enables three-dimensional motion control of the optical system. The arrangement of the fixed optical path folding element 2 and the image stabilization compensation component significantly reduces the rotational inertia of the traditional prism rotation structure, resulting in faster response speed and lower energy consumption for optical compensation actions. The two-dimensional translational motion of the image stabilization compensation component and the longitudinal displacement of the axial focusing component form a complementary control dimension, which can eliminate image blurring caused by lateral vibration and achieve precise focus tracking. The sequential arrangement of the three components along the optical axis effectively compresses the overall structural thickness, making it particularly suitable for the stringent requirements of ultra-thin modules in mobile devices. This architecture completely solves the driving difficulties caused by the excessive mass of traditional prism solutions. Through motion decoupling design, each functional module only needs to complete a single degree of freedom of motion, greatly reducing the complexity of the control system.

[0049] In this embodiment, the electromagnetic drive mechanism 31 is disposed around the image stabilization compensation optical component 3, and includes at least two sets of spatially orthogonally arranged coil units 311 and magnet units 312, providing planar driving force through unilateral magnetic field coupling. The linear drive mechanism 41 includes linear coil units 411 and linear magnet units 412.

[0050] A novel design employing spatial orthogonal drive unit groups coupled with a single-sided magnetic field achieves high-efficiency planar drive. The orthogonally arranged coil-magnet pairs form independent control channels in the X / Y axes, enabling both arbitrary-direction vector drive and avoiding interference from multi-axis motion coupling. The single-sided magnetic field coupling design optimizes the magnetic circuit distribution, concentrating the effective magnetic field on the drive surface. Compared to traditional double-sided magnetic circuit schemes, this effectively reduces ineffective magnetic flux and significantly improves magnetic field utilization. The symmetrical arrangement of coil unit 311 and magnet unit 312 ensures balanced drive torque while effectively suppressing eddy current losses during motion. This drive architecture is particularly suitable for high-frequency, low-amplitude vibration compensation scenarios. Its rapid response characteristics can accurately track high-frequency jitter signals from handheld devices, and its low-leakage magnetic design helps reduce electromagnetic interference to surrounding precision electronic components.

[0051] "Single-sided magnetic field coupling" refers to the use of asymmetrical arrangement of magnet and coil units on one side, combined with optimized magnetic circuit design (such as gradient magnetization and magnetic shielding), to concentrate effective magnetic field energy onto the driving surface, thereby achieving high-efficiency electromagnetic force transmission. This design differs from the traditional double-sided symmetrical magnetic field layout and features high magnetic field utilization, compact structure, and low electromagnetic interference.

[0052] In this embodiment, an orthogonal decoupling guide mechanism 32 is provided between the image stabilization compensation optical component 3 and the support member 11. The mechanism includes a first guide feature 321, a second guide feature 322, and a rolling element 323. The first guide feature 321 is formed on the bearing surface of the support member 11 and has a first extending direction. The second guide feature 322 is formed on the mating surface of the image stabilization compensation optical component 3 and has a second extending direction orthogonal to the first extending direction. The rolling element 323 is located between the first guide feature 321 and the second guide feature 322, forming a two-dimensional decoupling motion interface.

[0053] This guiding mechanism 32 achieves high-precision decoupling of planar motion through an innovative combination of orthogonal raceways and rolling elements. The intersecting arrangement of the first guiding feature 321 and the second guiding feature 322 decomposes the two-dimensional planar motion into two orthogonal linear degrees of freedom, each of which is guaranteed by an independent rolling constraint mechanism to ensure motion accuracy. The distribution of the rolling elements 323 within the intersecting guide grooves effectively disperses contact stress, reducing motion resistance compared to traditional sliding friction structures. The orthogonal raceway geometry ensures that the rolling elements maintain a uniform contact stress distribution throughout the motion, improving motion stability and significantly extending the service life of the mechanism. This decoupling mechanism 32 can also effectively isolate vibration transmission along different axes, maintaining excellent guiding accuracy even under complex motion conditions, making it particularly suitable for optical image stabilization systems requiring sub-micron positioning accuracy.

[0054] In this embodiment, the support member 11 is disposed on the housing 1 and located between the image stabilization compensation optical component 3 and the optical path deflection element 2. The first guiding feature 321 is formed on the surface of the support member 11 facing the image stabilization compensation optical component 3, and the second guiding feature 322 is formed on the surface of the image stabilization compensation optical component 3 facing the support member 11.

[0055] This layout achieves a compact structure through functional integration design. The support component 11, serving as a transitional carrier between the optical path deflection element 2 and the image stabilization assembly, not only functions as an optical positioning reference but also integrates key features of the guiding mechanism, significantly reducing the number of parts and assembly layers. The mirrored arrangement of the guiding features creates symmetrical mechanical support between the image stabilization assembly and the substrate, effectively improving system rigidity. This structural layout also completely isolates the electromagnetic drive unit from the optical elements in space, preventing heat generated by the drive mechanism from being directly conducted to the sensitive optical elements. The central position of the support component 11 helps shorten the travel distance of the optical compensation assembly, achieving maximum compensation range within a limited space. The face-to-face arrangement of the guiding surfaces also facilitates modular assembly processes, significantly improving production efficiency and product consistency.

[0056] In this embodiment, the axial focusing optical assembly 4 includes a separable optical element 42 and a support frame 43, and the support frame 43 forms an axial sliding fit with the housing 1 through at least two guide posts 44.

[0057] This design achieves independent optimization of functional components through the modular separation of the optical element 42 from the mechanical support. The separable structure allows for the selection of optical elements 42 made of different materials according to optical performance requirements, while the support frame 43 can utilize high-strength, lightweight materials to reduce moment of inertia. Multiple guide posts 44 are arranged to form a stable motion constraint system, effectively preventing tilting or deflection that may occur during focusing. As a guiding structure, the guide posts 44 effectively maintain the perpendicularity between components, ensuring movement stability, reducing component wear and operating noise caused by perpendicularity deviations, and providing reliable guiding support for moving parts of the equipment. The precise fit between the guide posts 44 and the sliding mating surface ensures axial movement accuracy and compensates for dimensional fluctuations caused by temperature changes through a reasonable clearance design. This structure also facilitates the implementation of active position feedback control; precise axial position information can be directly obtained by setting displacement sensors in the guide posts 44. The separable design also significantly simplifies the replacement and maintenance process of the optical element 42, significantly improving product maintainability while ensuring optical performance.

[0058] In this embodiment, the guide posts 44 are evenly spaced along the circumference of the housing 1.

[0059] The circumferentially uniform distribution scheme creates an optimal mechanical support environment. The guide posts 44, arranged at equal angles, form a symmetrical constraint force system around the moving components, effectively balancing the eccentric moments caused by anisotropic loads. This layout results in a more uniform distribution of contact stress in the sliding pairs, reducing the risk of localized wear and improving motion smoothness. The uniformly distributed guide posts 44 also form a stable motion reference frame, which helps eliminate the impact of assembly errors on motion accuracy. This design is particularly beneficial for handling thermal deformation caused by temperature changes, as the symmetrical structure effectively compensates for anisotropic dimensional variations. Under vibration conditions, circumferentially uniform support significantly increases the system's resonant frequency and enhances impact resistance. From a manufacturing process perspective, the symmetrical layout simplifies the establishment of machining references, which is beneficial for improving part machining accuracy and assembly efficiency.

[0060] In this embodiment, the coil unit 311 has an adjustable current direction, which enables the coil unit 311 and the corresponding magnet unit 312 to generate a variable electromagnetic force.

[0061] Bidirectional current control technology enables precise vector control of the driving force. By changing the direction of the coil current in real time, a push-pull bidirectional force can be generated on the same physical structure, significantly expanding the dynamic range of the driving force. This control method allows for closed-loop position control within a single drive unit, eliminating the need for additional passive components such as reset springs. The variable direction characteristic also supports the implementation of more complex control algorithms, such as preload compensation and nonlinear friction compensation. This design is particularly advantageous for achieving high-frequency response drive performance, as it can accurately track high-frequency vibration signals by rapidly switching the current direction. In terms of energy efficiency management, the bidirectional drive mode can automatically optimize the current phase according to the direction of motion, avoiding the ineffective power consumption problem of traditional unidirectional drives. This technology also provides a flexible foundation for multi-axis cooperative control, enabling complex motion trajectories through current phase difference control between different drive units.

[0062] In this embodiment, the shape of the coil unit 311 is adapted to the magnetic field distribution of the corresponding magnet unit 312.

[0063] Shape-fit design maximizes the utilization of magnetic field energy; the coil can be elliptical, circular, or square. Optimizing the coil shape through 3D magnetic field simulation ensures its winding path closely matches the magnetic field lines of the magnet unit 312, significantly improving electromagnetic conversion efficiency. The specially shaped coil generates a more uniform driving force gradient, which is beneficial for improving position control resolution. This fit design also effectively suppresses edge magnetic field distortion, reducing electromagnetic interference to surrounding sensitive components. From a thermal management perspective, the optimized coil shape increases the heat dissipation surface area, and combined with a reasonable winding arrangement, it reduces the power density per unit volume. This design also allows for more effective windings to be arranged in a limited space, increasing driving force output without increasing volume. Shape-fit technology also enables miniaturization of the drive system; through precise electromagnetic field matching, equivalent performance indicators can be achieved in a more compact space.

[0064] In this embodiment, the magnet unit 312 adopts a magnetization configuration with optimized magnetic field distribution.

[0065] Customized magnetization technology creates an ideal working magnetic field environment. Through multi-pole magnetization or gradient magnetization processes, a specific magnetic field distribution pattern tailored to the driving requirements is formed within the magnet unit 312. This optimized magnetization significantly increases the magnetic flux density of the effective working air gap while reducing the attenuation gradient of the edge magnetic field. The special magnetization configuration also compensates for magnetic field distortion in the drive gap, ensuring linear force-current characteristics throughout the entire stroke. This technology allows for customization of magnetic circuit characteristics according to specific application scenarios; for example, using high-coercivity materials in applications requiring high-frequency response, and optimizing remanent magnetization distribution in applications requiring low power consumption. The optimized magnetic field distribution also reduces eddy current losses in the drive coil, improving overall system energy efficiency. From a manufacturing perspective, precise magnetization control reduces the difficulty of subsequent calibration, improving product consistency and reliability.

[0066] like Figure 6 The diagram shows three magnetization configurations of the magnet unit in this embodiment. Besides the orthogonal arrangement of a single horizontal magnet and a single vertical magnet, these three types of Halbach arrays can be used to increase the magnetic intensity. The three magnetization configurations from left to right are:

[0067] I. First Magnetization Configuration

[0068] 1. Structural layout: It consists of three permanent magnets and is L-shaped as a whole.

[0069] 2. Magnetic pole direction:

[0070] Horizontal magnet: Located at the top of the L-shape, with the magnetic poles extending horizontally and the N pole facing to the right.

[0071] Vertical magnets: Two magnets arranged vertically below, with their N poles pointing upwards.

[0072] 3. Magnetic Field Characteristics: The vertical magnetic field is enhanced, with the N poles of the two lower vertical magnets pointing upwards, forming a double N-pole superposition in the vertical direction. This superposition effect significantly enhances the local magnetic field strength in the vertical direction, making it suitable for applications requiring high magnetic field density (such as areas in a magnetic circuit system where a concentrated magnetic field is needed). The horizontal and vertical magnetic fields are separated; the N poles of the horizontal magnets point to the right, forming an orthogonal arrangement with the N poles of the vertical magnets pointing upwards, thus separating the magnetic field directions. The horizontal magnetic field mainly extends to the right, while the vertical magnetic field concentrates upwards, forming a magnetic field boundary region at the L-shaped corner.

[0073] II. Second type of magnetization configuration

[0074] 1. Structural layout: It consists of three permanent magnets and is L-shaped as a whole.

[0075] 2. Magnetic pole direction:

[0076] Horizontal magnet: Located at the top of the L-shape, with the magnetic poles extending horizontally and the N pole facing to the right.

[0077] Vertical magnet: Located at the bottom of the L-shape, with the magnetic poles extending vertically and the N pole facing upwards.

[0078] The magnet at the bottom right: connects the horizontal magnet and the vertical magnet, with the N pole tilted downward at a 45° angle (relative to the vertical direction).

[0079] 3. Magnetic Field Characteristics: The magnetic field transitions at an angle, with the N pole of the lower right magnet tilted downwards at 45°. Its magnetic field can be decomposed into horizontal components to the right and vertical components downwards. This design creates a smooth magnetic field transition between the horizontal (rightward) and vertical (upward) magnets, reducing abrupt changes in magnetic field lines. The diverse magnetic field directions, introduced by the tilted magnetic poles, make the magnetic field direction at the L-shaped corner more complex, potentially forming a tilted magnetic field in the lower right direction. This is suitable for scenarios requiring multi-directional magnetic field coupling (such as magnetic circuits or sensors with special angles).

[0080] III. The third type of magnetization configuration

[0081] 1. Structural layout: It consists of three permanent magnets and is L-shaped as a whole.

[0082] 2. Magnetic pole direction:

[0083] Horizontal magnet: Located at the top of the L-shape, with the magnetic poles extending horizontally and the N pole facing to the right.

[0084] Vertical magnet: Located at the bottom of the L-shape, with the magnetic poles extending vertically and the N pole facing upwards.

[0085] The magnet at the bottom right: connects the horizontal magnet and the vertical magnet, with the N pole tilted upward at a 45° angle (relative to the vertical direction).

[0086] 3. Magnetic Field Characteristics: The magnetic field is strengthened at the corner. The N pole of the lower right magnet is tilted upward at 45°, and its magnetic field can be decomposed into horizontal components pointing to the right and vertical components pointing upward. When superimposed with the upward-pointing N pole of the vertical magnet, the vertical magnetic field at the corner is further enhanced, forming a high-density magnetic field concentration area. The magnetic field closure is optimized; the upward component of the tilted magnetic pole and the rightward magnetic field of the horizontal magnet may form a partially closed loop, reducing stray magnetic fields and improving magnetic circuit efficiency (suitable for motors or electromagnetic equipment).

[0087] In other embodiments, a periscope camera module may be used, including the actuation device as described in Embodiment 1. This camera module integrates an innovative actuation mechanism, achieving a breakthrough balance between optical and mechanical performance. The periscope architecture, combined with multi-dimensional active optical compensation technology, enables professional-grade optical image stabilization performance within a limited space. Innovative drive and control schemes give the module sub-pixel-level motion compensation accuracy, significantly improving image quality in low-light environments. The modular design supports rapid adaptation to different specifications of optical components, greatly expanding the product's application range. The module also exhibits excellent environmental adaptability; special thermal management design and electromagnetic shielding scheme ensure stable operation over a wide temperature range and in complex electromagnetic environments. From a manufacturing perspective, the highly integrated structural design significantly reduces the number of parts, lowers assembly difficulty, and improves mass production consistency.

[0088] In other embodiments, it can be a mobile terminal, including a terminal housing, a circuit board, and a periscope camera module as described above. Both the periscope camera module and the circuit board are located within the terminal housing. A light-transmitting window is provided on the terminal housing opposite the lens of the periscope camera module for light transmission. The actuation device of the periscope camera module is electrically connected to the circuit board. This mobile terminal achieves the imaging capabilities of professional photography equipment by integrating an advanced camera module. The ultra-thin periscope structure is perfectly integrated into the mobile device's ID design, providing optical zoom functionality without increasing the thickness of the body. Deep integration of the intelligent drive system with the terminal processor supports scene-based adaptive image stabilization algorithms. Special optical window materials and coating processes ensure light transmittance while providing excellent wear resistance and stain resistance. The overall electromagnetic compatibility design ensures that the high-frequency drive signal of the camera module does not affect the operation of other radio frequency modules. This terminal also supports a multi-camera collaborative working mode, enabling more complex computational photography functions through the coordinated operation of the main camera and the periscope lens. From a user experience perspective, the fast-response autofocus system and stable image stabilization significantly improve the success rate of shooting, especially in sports scenes and low-light environments.

[0089] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An actuation device, characterized in that, include Shell (1); Optical path deflection element (2) is fixedly installed on the housing (1); The image stabilization compensation optical component (3) achieves two-dimensional translational motion in a plane perpendicular to the optical axis through an electromagnetic drive mechanism (31); The axial focusing optical component (4) is axially displaced along the optical axis by a linear drive mechanism (41); The optical path folding element (2), the image stabilization compensation optical component (3), and the axial focusing optical component (4) are arranged sequentially along the optical axis.

2. The actuation device according to claim 1, characterized in that, The electromagnetic drive mechanism (31) is located around the anti-shake compensation optical component (3) and includes at least two sets of spatially orthogonally arranged coil units (311) and magnet units (312), which provide planar driving force through unilateral magnetic field coupling.

3. The actuation device according to claim 1, characterized in that, An orthogonal decoupling guide mechanism (32) is provided between the image stabilization compensation optical component (3) and the support member (11), the mechanism comprising: A first guiding feature (321) is formed on the bearing surface of the support member (11) and has a first extending direction; The second guiding feature (322) is formed on the mating surface of the image stabilization compensation optical component (3) and has a second extending direction orthogonal to the first extending direction; The rolling element (323) located between the first guide feature (321) and the second guide feature (322) constitutes a two-dimensional decoupled motion interface.

4. The actuation device according to claim 3, characterized in that, The support member (11) is disposed on the housing (1) and located between the image stabilization compensation optical component (3) and the optical path deflection element (2). The first guide feature (321) is formed on the surface of the support member (11) facing the image stabilization compensation optical component (3), and the second guide feature (322) is formed on the surface of the image stabilization compensation optical component (3) facing the support member (11).

5. The actuation device according to claim 1, characterized in that, The axial focusing optical assembly (4) includes a separable optical element (42) and a support frame (43), the support frame (43) forming an axial sliding fit with the housing (1) through at least two guide posts (44).

6. The actuation device according to claim 2, characterized in that, The coil unit (311) has an adjustable current direction, which enables the coil unit (311) and the corresponding magnet unit (312) to generate a variable electromagnetic force.

7. The actuation device according to claim 2, characterized in that, The shape of the coil unit (311) is adapted to the magnetic field distribution of the corresponding magnet unit (312).

8. The actuation device according to claim 2, characterized in that, The magnet unit (312) adopts a magnetization configuration with optimized magnetic field distribution.

9. A periscope camera module, characterized in that, Includes the actuation device as described in any one of claims 1-8.

10. A mobile terminal, characterized in that, The device includes a terminal housing, a circuit board, and a periscope camera module as described in claim 9. The periscope camera module and the circuit board are both located inside the terminal housing. A light-transmitting window for light transmission is provided on the terminal housing at a position opposite to the lens of the periscope camera module. The actuation device of the periscope camera module is electrically connected to the circuit board.

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