Optical anti-vibration motor and camera module

Abstract

The invention provides an optical anti-vibration motor and a camera module, and the motor comprises a pedestal; the support is movably connected to the base through a first guide mechanism so as to move in the first direction; the carrier is used for bearing the lens, the carrier is movably connected to the interior of the support through a second guide mechanism and can move in a plane, and the plane is perpendicular to the first direction; the elastic reset piece is connected between the carrier and the support and used for providing elastic restoring force for the carrier to enable the carrier to tend to the motion center position and limiting displacement of the carrier relative to the support in the first direction. The camera module comprises the optical anti-vibration motor.

Description

Technical Field

[0001] This disclosure relates to an optical image stabilization motor and a camera module. Background Technology

[0002] In the field of camera module technology, miniature camera modules typically need to integrate autofocus (AF) and optical image stabilization (OIS) functions.

[0003] To improve focusing accuracy, existing technologies employ a structure where the OIS bracket is placed outside the AF carrier. While this external OIS bracket structure improves focusing accuracy, the OIS bracket is typically connected to the AF carrier via ball bearings. This poses a risk that the ball bearings may detach from their grooves due to excessive focusing driving force or accidental impact, leading to reduced reliability of the camera function. Summary of the Invention

[0004] This disclosure provides an optical image stabilization motor and a camera module.

[0005] According to one aspect of this disclosure, an optical image stabilization motor is provided, comprising: a base; a bracket, the bracket being movably connected to the base via a first guide mechanism to be movable along a first direction; a carrier for carrying a lens, the carrier being movably connected inside the bracket via a second guide mechanism to be movable in a plane perpendicular to the first direction; and an elastic reset member connected between the carrier and the bracket for providing an elastic restoring force to the carrier to tend towards a center of motion and limiting the displacement of the carrier relative to the bracket in the first direction.

[0006] According to one aspect of the technical solution of this disclosure, the bracket moves relative to the base in a first direction via a first guide mechanism to achieve autofocus; the carrier moves relative to the bracket in a plane via a second guide mechanism to achieve optical image stabilization. An elastic reset member uses elastic restoring force to bring the carrier towards the center of motion and restricts the carrier's displacement relative to the bracket in the first direction, thereby preventing the rolling elements in the second guide mechanism from falling out of the guide groove due to excessive focusing driving force or accidental impact, thus solving the problem of reduced camera reliability caused by ball bearing detachment in the prior art.

[0007] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the second guiding mechanism includes: a first set of guide grooves formed on a bracket; a second set of guide grooves formed on a carrier and disposed opposite to the first set of guide grooves; and a rolling element disposed between the bracket and the carrier, and disposed within the first set of guide grooves and the second set of guide grooves; wherein, in a projection in a first direction, the extending direction of the first set of guide grooves intersects perpendicularly with the extending direction of the second set of guide grooves.

[0008] In the technical solution of this embodiment, the rolling element rolls in the first set of guide grooves and the second set of guide grooves, allowing the carrier to move relative to the support in a plane; since the extension direction of the first set of guide grooves intersects perpendicularly with the extension direction of the second set of guide grooves, the carrier can move in two perpendicular directions in the plane to achieve optical image stabilization.

[0009] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the extension direction of the first set of guide grooves is parallel to the first horizontal direction, the extension direction of the second set of guide grooves is parallel to the second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction.

[0010] In the technical solution of this embodiment, by extending the first set of guide grooves uniformly along the first horizontal direction and the second set of guide grooves uniformly along the second horizontal direction, two sets of orthogonal guide groove systems are formed, so that the rolling body is constrained in mutually perpendicular directions, thereby ensuring that the carrier can perform stable optical image stabilization movement relative to the support in two perpendicular directions in the plane.

[0011] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the first set of guide slots and the second set of guide slots are both arranged in a circumferential array.

[0012] In the technical solution of this embodiment, the symmetrical distribution method can make the force on the carrier more balanced in all directions of the plane, thereby improving the stability and control accuracy of the optical image stabilization motion.

[0013] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the first set of guide slots includes at least one slot extending along a first horizontal direction and at least one slot extending along a second horizontal direction; in the second set of guide slots, the slot opposite to the slot in the first horizontal direction extends along the second horizontal direction, and the slot opposite to the slot in the second horizontal direction extends along the first horizontal direction.

[0014] In this embodiment, a cross-paired guiding structure is formed by simultaneously setting slots in different directions in the first set of guiding slots and correspondingly setting vertical slots in the second set of guiding slots. This guiding structure allows the carrier's movement in the plane to be achieved through combinations of slots in different directions, enhancing the flexibility and reliability of optical image stabilization.

[0015] An optical image stabilization motor according to at least one embodiment of the present disclosure further includes: a first magnet disposed on the bracket; and a first coil disposed on the base, wherein when energized, the first coil interacts with the first magnet to generate a focusing driving force that drives the bracket to carry the carrier to move in a first direction.

[0016] In the technical solution of this embodiment, when the first coil is energized, it interacts with the first magnet to generate a focusing driving force, which drives the bracket to carry the carrier to move along the first direction, thereby realizing the automatic focusing function.

[0017] An optical image stabilization motor according to at least one embodiment of the present disclosure further includes: a second magnet disposed on the carrier; and a second coil disposed on the base; wherein the second magnet and the second coil are each provided in two sets, and the extension directions of the two sets of the second coil are perpendicular to each other, so as to generate an image stabilization driving force respectively to drive the carrier to move in two mutually perpendicular directions in the plane when energized.

[0018] In the technical solution of this embodiment, when the two sets of second coils are energized, they interact with the two sets of second magnets respectively, generating anti-shake driving forces in two mutually perpendicular directions in the plane, driving the carrier to move relative to the support, and realizing the optical image stabilization function.

[0019] The optical image stabilization motor according to at least one embodiment of the present disclosure further includes a position sensing element disposed at the center of the first coil and / or the second coil, for sensing the position information of the first magnet and / or the second magnet, and feeding the position information back to the control unit, the control unit for dynamically adjusting the current input to the first coil and / or the second coil based on the position information, so as to realize closed-loop control of the movement of the bracket in the first direction and / or the movement of the carrier in the plane.

[0020] In the technical solution of this embodiment, the position sensing element senses the position information of the first magnet and / or the second magnet in real time and feeds the position information back to the control unit; the control unit dynamically adjusts the current input to the first coil and / or the second coil based on the position information, thereby accurately controlling the movement of the bracket in the first direction and / or the movement of the carrier in the plane, realizing closed-loop control.

[0021] An optical image stabilization motor according to at least one embodiment of the present disclosure further includes an adsorption magnet and a magnetic conductor, the adsorption magnet being disposed on the carrier, and the magnetic conductor being disposed on the support and disposed opposite to the adsorption magnet to generate a magnetic attraction force, the magnetic attraction force being configured to provide an attraction force toward the support during the movement of the carrier relative to the support.

[0022] In the technical solution of this embodiment, the adsorption magnet and the magnetic conductor are arranged opposite to each other to generate magnetic attraction. This magnetic attraction provides an adsorption force pointing towards the support during the movement of the carrier relative to the support, which enhances the connection stability between the carrier and the support and prevents the rolling element from falling off the guide groove.

[0023] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the projection of the adsorption magnet on a projection plane parallel to the plane at least partially covers the displacement trajectory of the magnetic conductor during the movement; and the magnetic center of the adsorption magnet coincides with the geometric center of the adsorption steel sheet in the initial position.

[0024] In the technical solution of this embodiment, the projection of the adsorbing magnet covers the displacement trajectory of the magnetic conductor, and the magnetic center coincides with the geometric center of the adsorbing steel sheet at the initial position, ensuring that the magnetic attraction force remains uniform and stable during the movement, and avoiding deflection caused by uneven force on the carrier due to magnetic force offset.

[0025] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the adsorption magnet and at least one second magnet are arranged symmetrically about the center of the carrier.

[0026] In the technical solution of this embodiment, the adsorption magnet and at least one second magnet are symmetrically arranged about the center of the carrier, so that the center of the resultant force of the magnetic attraction coincides with or is close to the center of gravity of the carrier, preventing the carrier from deflecting due to uneven force during movement and ensuring the stability of the optical image stabilization movement.

[0027] The optical image stabilization motor according to at least one embodiment of the present disclosure further includes a flexible circuit board, which is fixedly disposed on the base and electrically connected to the first coil, the second coil and the position sensing element.

[0028] In the technical solution of this embodiment, the flexible circuit board is fixedly disposed on the base and electrically connected to the first coil, the second coil and the position sensing element, providing driving current for the first coil and the second coil, and transmitting the sensing signal of the position sensing element to realize the transmission and control of electrical signals.

[0029] The optical image stabilization motor according to at least one embodiment of the present disclosure further includes a cover plate, and a limiting structure is provided between the cover plate and the bracket for limiting the displacement of the carrier in the first direction; the limiting structure includes a slot / limiting post disposed on the cover plate and a limiting post / slot disposed on the bracket, the slot engaging with the limiting post.

[0030] In the technical solution of this embodiment, the cover plate is fixed to the bracket by engaging with the limiting post through the slot, which restricts the displacement of the carrier in the first direction. Together with the elastic reset member, it constitutes a mechanical limiting mechanism to prevent excessive displacement of the carrier, thereby enhancing the structural reliability of the optical image stabilization motor.

[0031] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the elastic reset member is a spring sheet, the spring sheet is provided with a positioning hole, the carrier and the bracket are provided with positioning posts adapted to the positioning hole, and the spring sheet is sleeved on the positioning post through the positioning hole and fixed between the carrier and the bracket.

[0032] In the technical solution of this embodiment, the spring is positioned by cooperating with the positioning post on the carrier and the bracket through the positioning hole, and is fixedly connected by the fastener, so as to ensure the stable connection of the spring between the carrier and the bracket and provide continuous elastic restoring force.

[0033] According to at least one embodiment of the optical image stabilization motor of the present disclosure, the first guiding mechanism includes: a third set of guide grooves formed on the side of the bracket; a fourth set of guide grooves formed on the inner side of the base and opposite to the third set of guide grooves; and a ball bearing disposed within the third set of guide grooves and the fourth set of guide grooves; wherein the third set of guide grooves and the fourth set of guide grooves are parallel to each other, and the extending directions of the third set of guide grooves and the fourth set of guide grooves are parallel to the first direction.

[0034] In the technical solution of this embodiment, the ball rolls in the third and fourth guide grooves to form a rolling guide pair for the bracket to move relative to the base in the first direction, ensuring the stability and accuracy of the bracket's movement in the first direction and providing reliable guiding support for the autofocus function.

[0035] According to another aspect of this disclosure, a camera module is provided, comprising: an optical image stabilization motor as described in any of the preceding claims; and a lens, the lens being carried within the carrier.

[0036] In the technical solution disclosed herein, the optical image stabilization motor provides autofocus and optical image stabilization functions for the camera module. The lens is carried in the carrier, and precise focusing and shake compensation are achieved by driving the optical image stabilization motor, thereby improving the imaging quality of the camera module. Attached Figure Description

[0037] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0038] Figure 1 This is an exploded view of an optical image stabilization motor according to one embodiment of the present disclosure.

[0039] Figure 2 This is an exploded view of an optical image stabilization component according to one embodiment of the present disclosure.

[0040] Figure 3 This is a schematic diagram of a structure in which a support and a carrier are connected by an elastic resetting body according to one embodiment of the present disclosure.

[0041] Figure 4 This is an exploded view of a support and carrier according to one embodiment of the present disclosure.

[0042] Figure 5 This is an exploded view of a support and carrier according to one embodiment of the present disclosure.

[0043] Figure 6 This is a structural schematic diagram of a first set of guide grooves, a second set of guide grooves, and a rolling element according to an embodiment of the present disclosure.

[0044] Figure 7 This is a schematic diagram of the structure of a rolling element cooperating with a first set of guide grooves and a second set of guide grooves according to an embodiment of the present disclosure.

[0045] Figure 8 This is a schematic diagram of a structure in which an adsorption magnet and a magnetic conductive element are symmetrically arranged according to one embodiment of the present disclosure.

[0046] Figure 9 This is a schematic diagram of the structure of an adsorption magnet and a magnetic conductive element according to one embodiment of the present disclosure.

[0047] Figure 10 This is a schematic diagram of the structure of a flexible circuit board according to one embodiment of the present disclosure.

[0048] Figure 11 This is a schematic diagram of a flexible circuit board fixed to a base according to one embodiment of the present disclosure.

[0049] Figure 12 This is a schematic diagram of the structure of a cover plate according to one embodiment of the present disclosure.

[0050] Figure 13 This is a schematic diagram of the connection between the cover plate and the bracket according to one embodiment of the present disclosure.

[0051] Figure 14 This is a schematic diagram of the connection between an optical image stabilization component and a base according to one embodiment of the present disclosure.

[0052] Figure 15 This is a schematic diagram of the structure of an optical image stabilization motor according to one embodiment of the present disclosure.

[0053] Figure label: 100 bases 110 First coil 120 Second coil 130 position sensing element 140 Fourth group of guide slots 200 brackets 210 First group of guide slots 220 First Lodestone 230 Magnetic Conductor 240 limit post 250 Second positioning post 260 Third group of guide slots 270 First slot 280 steel sheet groove 300 carriers 310 Second group of guide slots 320 Second Magnet 330 Adsorption Magnet 340 First positioning post 350 Second slot 360° Adsorption Magnet Slot 400 Elastic Reset Component 410 Shrapnel 411 Positioning Hole 500 rolling elements 600 Flexible Circuit Board 610 Reinforcing Steel Sheet 700 cover plate 710 Card Slot 800 ball bearings 900 casing. Detailed Implementation

[0054] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0055] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0057] To facilitate description and make the technical solutions of this disclosure easier to understand, the terminology of this disclosure will be explained before describing the technical solutions of this disclosure.

[0058] Carrier: refers to the moving part in the camera module that carries the lens, and its movement enables optical image stabilization (OIS).

[0059] Support: refers to the intermediate component that is movably mounted on the base to support the carrier, and its movement enables the autofocus (AF) function.

[0060] Elastic restoring component: refers to a component with elastic deformation capability, which can provide restoring force to connected parts and make them tend to a stable position, such as a metal spring.

[0061] Guide groove: refers to a groove structure formed on the surface of a component to constrain the movement trajectory of rolling elements.

[0062] Rolling element: refers to a spherical element, such as a ball, that is placed between two relatively moving parts to convert sliding friction into rolling friction.

[0063] In existing technologies, the external OIS bracket structure used to improve focusing accuracy poses a risk that the ball bearings between the bracket and the carrier may fall out of the ball bearing groove due to excessive focusing driving force or accidental impact, resulting in reduced reliability of the camera function.

[0064] Figure 1 This is an exploded view of an optical image stabilization motor according to one embodiment of the present disclosure. Figure 2 This is an exploded view of an optical image stabilization component according to one embodiment of the present disclosure. Figure 3 This is a schematic diagram of a structure in which a support and a carrier are connected by an elastic resetting body according to one embodiment of the present disclosure.

[0065] like Figure 1 , Figure 2 and Figure 3 As shown, this disclosure provides an optical image stabilization motor, including a base 100, a bracket 200, a carrier 300, and an elastic reset member 400.

[0066] The base 100 serves as the mounting foundation and fixation reference for the entire motor.

[0067] The bracket 200 is movably connected to the base 100 via the first guide mechanism so that it can move along the first direction (optical axis direction) to achieve autofocus function.

[0068] The carrier 300 is used to support the lens. The carrier 300 is movably connected to the inside of the bracket 200 through the second guide mechanism and can move in a plane that is perpendicular to the first direction to achieve optical image stabilization.

[0069] The elastic reset member 400 is connected between the carrier 300 and the bracket 200 to provide the carrier 300 with an elastic restoring force that makes it tend to the center of motion and to limit the displacement of the carrier 300 relative to the bracket 200 in the first direction, so as to prevent the rolling element 500 from falling off.

[0070] The working principle and solution to the aforementioned technical problems of the optical image stabilization motor are as follows: The bracket 200 moves relative to the base 100 in a first direction via a first guide mechanism to achieve autofocus; the carrier 300 moves relative to the bracket 200 in a plane via a second guide mechanism to achieve optical image stabilization. The elastic reset member 400, through its elastic restoring force, ensures that the carrier 300 always tends to return to its center of motion position and restricts the displacement of the carrier 300 in the first direction. When the focusing driving force is large or an external impact occurs, the elastic reset member 400 presses the carrier 300 tightly against the bracket 200. Simultaneously, it works in conjunction with any possible magnetic attraction and the limiting structure of the cover plate 700 to ensure that the rolling element 500 in the second guide mechanism is always confined within the guide groove, effectively preventing the rolling element 500 from falling off and solving the problem of reduced reliability of the camera module in the background technology.

[0071] For example, the elastic reset member 400 is a sheet-like spring 410, which has positioning holes 411. The carrier 300 and the support 200 are provided with positioning posts (a first positioning post 340 on the carrier 300 and a second positioning post 250 on the support 200) that are adapted to the positioning holes 411. The spring 410 is fitted onto the positioning posts through the positioning holes 411 and fixed between the carrier 300 and the support 200. The sheet-like spring 410 is made of a metal material with good elasticity and has multiple positioning holes 411 precisely machined on it. Corresponding positioning posts are provided at the four corners of the carrier 300 and the support 200. During assembly, the positioning holes 411 of the spring 410 are fitted into these positioning posts, and then permanent fixation can be achieved through adhesive application or micro-riveting. This fixing method ensures that the spring 410 will not loosen during long-term use, and its elastic restoring force can continuously maintain the carrier 300 in the center of motion position.

[0072] Figure 4 This is an exploded view of a support and carrier according to one embodiment of the present disclosure. Figure 5 This is an exploded view of a support and carrier according to one embodiment of the present disclosure.

[0073] like Figure 4 and Figure 5As shown, in some embodiments of this disclosure, the second guiding mechanism includes a first set of guide grooves 210 formed on the support 200, a second set of guide grooves 310 formed on the carrier 300 and disposed opposite to the first set of guide grooves 210, and a rolling element 500 disposed between the support 200 and the carrier 300 and accommodated within the first set of guide grooves 210 and the second set of guide grooves 310. In the projection of the first direction, the extending direction of the first set of guide grooves 210 intersects perpendicularly with the extending direction of the second set of guide grooves 310. The rolling element 500 rolls within the raceway formed by the first set of guide grooves 210 and the second set of guide grooves 310, enabling the carrier 300 to perform low-friction motion relative to the support 200 in a plane. Since the extending directions of the first set of guide grooves 210 and the second set of guide grooves 310 intersect perpendicularly, this arrangement decomposes the motion of the carrier 300 in the plane into two independent motion components in vertical directions. For example, when the carrier 300 needs to perform anti-shake compensation in a certain direction, the rolling element 500 rolls in the guide groove in the corresponding direction to achieve precise compensation for the shaking in the specific direction, thus ensuring the accuracy and stability of the optical anti-shake motion.

[0074] Figure 6 This is a structural schematic diagram of a first set of guide grooves, a second set of guide grooves, and a rolling element according to an embodiment of the present disclosure.

[0075] As an example, the first set of guide grooves 210 extends parallel to the first horizontal direction, and the second set of guide grooves 310 extends parallel to the second horizontal direction, with the first horizontal direction perpendicular to the second horizontal direction. Figure 6 As shown, the first set of guide grooves 210 (corresponding to the red rectangular outline in the figure) and the second set of guide grooves 310 (corresponding to the blue rectangular outline in the figure) are arranged in an orthogonal "+" shape on the plane. Each layout unit has a rolling element 500 (corresponding to the gray circle in the figure) at its center. When a shock-absorbing driving force is generated along the first horizontal direction (e.g., the X direction), the movement of the carrier 300 relative to the support 200 is mainly constrained by the second set of guide grooves 310 (e.g., the Y-direction groove), and the rolling element 500 rolls within the first set of guide grooves 210 (X-direction groove) to allow X-direction displacement. Conversely, when driven along the second horizontal direction (Y direction), the movement is mainly constrained by the first set of guide grooves 210 (X-direction groove), and the rolling element 500 rolls within the second set of guide grooves 310 (Y-direction groove). In short, the guide grooves parallel to the direction of movement of the carrier 300 (such as the X-groove on the support 200 during X-axis movement) provide a rolling path for the rolling element 500; while the guide grooves perpendicular to the direction of movement (such as the Y-groove on the carrier 300 during X-axis movement) mainly provide guidance and constraint to ensure the straightness of the movement trajectory.

[0076] Figure 7This is a schematic diagram of the structure of a rolling element cooperating with a first set of guide grooves and a second set of guide grooves according to an embodiment of the present disclosure.

[0077] For example, the first set of guide slots 210 and the second set of guide slots 310 are both arranged in a circular array. Figure 7 As shown, this further illustrates the specific form of the first set of guide grooves 210 and the second set of guide grooves 310 arranged in a circular array on the carrier 300 and the support 200. Four identical layout units are located in the four quadrants, symmetrical about the X and Y axes. Each unit also includes a rolling element 500 (a central gray circle), a first set of guide grooves 210 (a central red square outline), and a second set of guide grooves 310 (a peripheral blue square outline). The guide grooves are evenly distributed around the support 200 and the carrier 300, forming a symmetrical support structure. This distribution ensures that the carrier 300 receives uniform support force and consistent friction characteristics when moving in any direction within the plane, avoiding motion jamming or deviation caused by uneven force, and improving the stability and reliability of optical image stabilization.

[0078] As an example, such as Figure 7 As shown, the first set of guide grooves 210 includes at least one slot extending along a first horizontal direction and at least one slot extending along a second horizontal direction; in the second set of guide grooves 310, the slots opposite to the slots in the first horizontal direction extend along the second horizontal direction, and the slots opposite to the slots in the second horizontal direction extend along the first horizontal direction. Specifically, the first set of guide grooves 210 on the support 200 are not all oriented in the same direction, but rather some extend along the X direction and some extend along the Y direction; correspondingly, the second set of guide grooves 310 on the carrier 300 are perpendicularly paired with them. For example, in a unit located in the first quadrant, if the red slot of the first set of guide grooves 210 extends along the X direction, then the blue slot of the second set of guide grooves 310 extends along the Y direction, thereby jointly constraining the rolling element 500 in the middle. When the carrier 300 moves, this cross-pairing ensures that the movement in two vertical directions can be guided and constrained simultaneously.

[0079] like Figure 4 and Figure 5As shown, in some embodiments of this disclosure, the optical image stabilization motor further includes a first magnet 220 disposed on the bracket 200 and a first coil 110 disposed on the base 100. When the first coil 110 is energized, it interacts with the first magnet 220 to generate a focusing driving force that drives the bracket 200 to carry the carrier 300 to move along a first direction. Exemplarily, the bracket 200 has a first slot 270 on its side, and the first magnet 220 is fixedly assembled in the first slot 270 by adhesive dispensing. When current passes through the first coil 110, a changing magnetic field is generated. This magnetic field interacts with the constant magnetic field of the first magnet 220, generating a thrust along the first direction (i.e., the optical axis direction) according to the Lorentz force law. This thrust pushes the entire bracket 200 and its internal carrier 300 and lens together to move along the Z-axis, thereby achieving autofocus.

[0080] In some embodiments of this disclosure, the optical image stabilization motor further includes a second magnet 320 disposed on the carrier 300 and a second coil 120 disposed on the base 100. Two sets of the second magnet 320 and the second coil 120 are provided, with the extension directions of the two sets of second coils 120 perpendicular to each other, so as to generate image stabilization driving forces to drive the carrier 300 to move in two mutually perpendicular directions in a plane when energized. Exemplarily, the two sets of second magnets 320 are typically symmetrically mounted in the second slot 350 on the side of the carrier 300 and fixed by adhesive. The corresponding two sets of second coils 120 are arranged perpendicularly on the base 100. When the carrier 300 needs to move in the X-axis direction, the current flowing to the second coil 120 extending in the Y-direction is controlled. The magnetic field generated by this coil interacts with the corresponding second magnet 320 to generate a Lorentz force in the X-direction. Similarly, controlling the current of the other set of coils can achieve Y-direction drive.

[0081] Furthermore, the optical image stabilization motor also includes a position sensing element 130, which is disposed at the center of the first coil 110 and / or the second coil 120. This element senses the position information of the first magnet 220 and / or the second magnet 320 and feeds the position information back to the control unit. The control unit dynamically adjusts the current input to the first coil 110 and / or the second coil 120 based on the position information to achieve closed-loop control of the movement of the support 200 in the first direction and / or the planar movement of the carrier 300. The working principle of this closed-loop control system is as follows: the position sensing element 130 (such as a Hall effect sensor) detects the change in the magnetic field strength of the corresponding magnet in real time and converts it into an electrical signal. This signal reflects the real-time position of the magnet (i.e., the support 200 or the carrier 300). The control unit (usually a dedicated drive chip) compares the received position signal with the target position and dynamically adjusts the magnitude and direction of the current output to the coil according to the deviation value using a specific control algorithm (such as a PID algorithm). This closed-loop feedback mechanism can correct motion errors in real time and overcome interference from friction and inertia, thereby achieving high-precision control of the autofocus movement of the support 200 and the image stabilization movement of the carrier 300. For example, during image stabilization, the system continuously detects the position of the carrier 300 and fine-tunes the drive current to ensure that the lens is quickly and accurately stabilized at the target compensation position.

[0082] Figure 8 This is a schematic diagram of a structure in which an adsorption magnet and a magnetic conductive element are symmetrically arranged according to one embodiment of the present disclosure.

[0083] like Figure 4 , Figure 5 and Figure 8 As shown, in some embodiments of this disclosure, the optical image stabilization motor further includes an adsorption magnet 330 disposed on the carrier 300 and a magnetic guide 230 disposed on the bracket 200. The adsorption magnet 330 and the magnetic guide 230 are disposed opposite to each other to generate a magnetic attraction force, which is configured to provide an attraction force pointing towards the bracket 200 during the movement of the carrier 300 relative to the bracket 200. Exemplarily, the adsorption magnet 330 is fixed to a dedicated adsorption magnet slot 360 on the carrier 300 by dispensing adhesive, while the magnetic guide 230 (such as an adsorption steel sheet made of magnetically conductive material) is fixed to a steel sheet slot 280 at the bottom of the bracket 200 by dispensing adhesive. When the carrier 300 and the bracket 200 are assembled, a continuous magnetic attraction force is generated between the adsorption magnet 330 and the magnetic guide 230. This magnetic attraction force provides an additional force that pulls the carrier 300 toward the bracket 200 throughout the entire stroke of the carrier 300 during the image stabilization movement. The force, together with the restoring force of the elastic reset member 400, enhances the gripping effect on the rolling element 500 placed in the first set of guide grooves 210 and the second set of guide grooves 310, further reducing the possibility that the rolling element 500 may fall out of the groove due to inertia or external impact.

[0084] Specifically, to ensure that the center of the magnetic attraction coincides with the center of gravity of the carrier 300 and to prevent the generation of a deflection torque that would cause the carrier 300 to tilt, the magnet and the adsorption steel sheet are combined in a symmetrically distributed manner according to special requirements. Figure 8 The example demonstrates three possible combinations (labeled ①, ②, and ③ respectively), all sharing the core principle that regardless of the specific layout, the spatial distribution of the magnetic guide 230 and the adsorption magnet 330 satisfies geometric symmetry. Crucially, in the initial position, the magnetic center of the adsorption magnet 330 coincides with the geometric center of the corresponding magnetic guide 230; throughout the entire anti-shake motion of the carrier 300, the displacement trajectory of the adsorption magnet 330 is always contained within the projection range of the magnetic guide 230. This ensures the stability and symmetry of the magnetic attraction force from both dynamic and static dimensions. Furthermore, the position of the steel plate slot 280 is designed to be as close as possible to the first set of guide slots 210 on the support 200, allowing the magnetic attraction force to act more evenly on the rolling element 500, optimizing the gripping effect between the balls, support, and carrier.

[0085] Figure 9 This is a schematic diagram of the structure of an adsorption magnet and a magnetic conductive element according to one embodiment of the present disclosure.

[0086] like Figure 9 As shown, to ensure the magnetic attraction is effective throughout the entire movement of the carrier 300, the projection of the adsorbing magnet 330 onto a plane parallel to the plane at least partially covers the displacement trajectory of the magnetic conductor 230 during movement; and the magnetic center of the adsorbing magnet 330 coincides with the geometric center of the adsorbing steel sheet in the initial position. The dimensions of the magnetic conductor 230 are designed so that its projection can completely or at least partially cover all possible positions of the adsorbing magnet 330 during movement. Simultaneously, in the initial assembly position (i.e., the center position), through precision machining and assembly, it is ensured that the magnetic center of the adsorbing magnet 330 is precisely aligned with the geometric center of the adsorbing steel sheet. This ensures that the line of action of the magnetic attraction passes through the ideal force point of the carrier 300, avoiding the torque that would cause the carrier 300 to tilt due to magnetic eccentricity, thereby ensuring the smoothness of the carrier 300's movement.

[0087] Specifically, such as Figure 9 As shown, the relative positional relationship between the adsorption magnet 330 (blue elongated structure in the figure) and the magnetic conductive element 230 (red block element in the figure) is as follows: First, when the carrier 300 and the support 200 are in the initial (or central) position, the geometric center of the magnetic conductive element 230 coincides with the magnetic center of the adsorption magnet 330 (e.g., ...). Figure 9(As shown in the schematic diagram on the left). This precise alignment in the initial state is fundamental to ensuring that the line of action of the resultant magnetic force passes through the ideal force point on the carrier, avoiding the tendency of the carrier to tilt due to force line deviation when stationary or starting. Furthermore, during the entire stroke of the carrier 300's anti-shake movement, the displacement trajectory of the adsorbed magnet 330 on the projection plane parallel to the plane of motion can be completely contained within the projected shape of the magnetic conductor 230 (e.g., Figure 9 (As shown in the diagram on the right). This means that no matter where the carrier moves, the magnet always maintains an effective overlap area with the steel sheet, thereby ensuring that the magnitude of the magnetic attraction does not change abruptly or decrease, providing a consistent and stable adsorption and retention force throughout the entire process.

[0088] Furthermore, such as Figure 4 As shown, the adsorption magnet 330 and at least one second magnet 320 are arranged symmetrically about the center of the carrier 300. Specifically, the adsorption magnet 330 used to generate magnetic attraction and one of the second magnets 320 used to drive anti-shake movement are arranged symmetrically about the geometric center or center of mass of the carrier 300. For example, if two second magnets 320 are provided on the carrier 300, the adsorption magnet 330 and one of the second magnets 320 are centrally symmetrical. This symmetrical arrangement ensures that the point of application of the resultant force generated by the magnetic attraction and the electromagnetic force driving anti-shake on the carrier 300 is as close as possible to the center of gravity of the carrier 300, effectively preventing the carrier 300 from deflecting and tilting around its center due to uneven force during movement, and improving the uniformity of force on the rolling elements 500 at the four corners.

[0089] Figure 10 This is a schematic diagram of the structure of a flexible circuit board according to one embodiment of the present disclosure. Figure 11 This is a schematic diagram of a flexible circuit board fixed to a base according to one embodiment of the present disclosure.

[0090] like Figure 1 , Figure 10 and Figure 11As shown, in some embodiments of this disclosure, the optical image stabilization motor further includes a flexible circuit board 600. The flexible circuit board 600 is fixedly disposed on the base 100 and electrically connected to the first coil 110, the second coil 120, and the position sensing element 130. Exemplarily, the flexible circuit board 600 is fixed to the side of the base 100 by adhesive. The first coil 110 and the second coil 120 receive drive current from an external control unit through the flexible circuit board 600, while the position sensing element 130 feeds back the detected magnet position signal to the control unit through the flexible circuit board 600. Specifically, a reinforcing steel sheet 610 is integrated on the flexible circuit board 600. The reinforcing steel sheet 610 is adhered to the side of the base 100, serving both to enhance structural strength and, due to its magnetic permeability, to act as an adsorption steel sheet, interacting with the adsorption magnet 330 on the carrier 300 to generate auxiliary adsorption force.

[0091] Figure 12 This is a schematic diagram of the structure of a cover plate according to one embodiment of the present disclosure. Figure 13 This is a schematic diagram of the connection between the cover plate and the bracket according to one embodiment of the present disclosure.

[0092] like Figure 2 , Figure 12 and Figure 13 As shown, in some embodiments of this disclosure, the optical image stabilization motor further includes a cover plate 700. A limiting structure is provided between the cover plate 700 and the bracket 200 to limit the displacement of the carrier 300 in a first direction. The limiting structure includes a slot 710 / limiting post 240 disposed on the cover plate 700 and a limiting post 240 / slot 710 disposed on the bracket 200. The slot 710 and the limiting post 240 are engaged. For example, the inner sidewall of the cover plate 700 is provided with an inwardly protruding slot 710 structure, and the bracket 200 is provided with a corresponding limiting post 240. When the cover plate 700 and the bracket 200 are assembled, the slot 710 and the limiting post 240 are engaged. This mechanical interlocking structure provides rigid limitation for the displacement of the carrier 300 in the first direction, forming redundant protection with the elastic limitation of the elastic reset member 400, jointly preventing the rolling element 500 from falling off due to excessive displacement of the carrier 300 caused by excessive external impact.

[0093] Figure 14 This is a schematic diagram of the connection between an optical image stabilization component and a base according to one embodiment of the present disclosure.

[0094] like Figure 11 , Figure 13 and Figure 14As shown, as an example, the first guiding mechanism includes: a third set of guide grooves 260 formed on the side of the bracket 200; a fourth set of guide grooves 140 formed on the inner side of the base 100 and opposite to the third set of guide grooves 260; and ball bearings 800 disposed within the third set of guide grooves 260 and the fourth set of guide grooves 140; wherein the third set of guide grooves 260 and the fourth set of guide grooves 140 are parallel to each other and extend in a direction parallel to a first direction. When the first coil 110 is energized to generate a driving force, the bracket 200 rolls within the guide grooves on the base 100 via the ball bearings 800, achieving smooth, low-friction movement along the optical axis. In particular, the third set of guide grooves 260 and the fourth set of guide grooves 140 accommodate three ball bearings 800, with the middle ball bearing 800 being smaller than the two side ball bearings 800; this unequal diameter design helps improve motion stability.

[0095] Figure 15 This is a schematic diagram of the structure of an optical image stabilization motor according to one embodiment of the present disclosure.

[0096] In some embodiments of this disclosure, such as Figure 1 and Figure 15 As shown, the optical image stabilization motor also includes a housing 900. The housing 900 covers the components such as the base 100, bracket 200, carrier 300, and cover plate 700, and its main function is to provide physical protection for the internal components, preventing dust, foreign objects from entering, and damage caused by accidental collisions. Specifically, a limiting structure is provided on the inner side of the top of the housing 900. This limiting structure cooperates with a corresponding part on the bracket 200 or carrier 300 to ultimately limit the autofocus movement of the bracket 200 along the first direction.

[0097] This disclosure also provides a camera module, including: an optical image stabilization motor as described above and a lens (not shown) carried within a carrier 300.

[0098] The camera module operates as follows: the optical image stabilization motor (OIS) serves as the core driving component, and the lens is fixed within the carrier 300 via a threaded connection or adhesive bonding. When the module is operational, the OIS drives the lens to perform autofocus and optical image stabilization movements according to control signals. The entire module may also include an image sensor (not shown in the figure), which is electrically connected to the OIS via a flexible circuit board 600, together forming a complete imaging system. The housing structure provides final limit protection for the autofocus travel.

[0099] The working process of the optical image stabilization motor and camera module in the above technical solution is as follows: Autofocus (AF) working process: When a need to adjust the focus is detected, the control unit outputs a current of a specific magnitude and direction to the first coil 110 disposed on the base 100. The current is transmitted to the first coil 110 through the flexible circuit board 600.

[0100] When the first coil 110 is energized, it generates a changing magnetic field. This magnetic field interacts with the constant magnetic field of the first magnet 220 set on the support 200, generating a focusing driving force along the first direction according to the Lorentz force law.

[0101] The driving force propels the bracket 200 to move relative to the base 100 along the Z-axis. The movement of the bracket 200 is guided by the first guide mechanism: the third set of guide grooves 260 on the side of the bracket 200 is arranged opposite to the fourth set of guide grooves 140 on the inner side of the base 100, and the ball bearings 800 contained therein roll in the grooves, converting sliding friction into rolling friction, ensuring that the movement of the bracket 200 is smooth and precise.

[0102] During this process, the position sensing element 130, located at the center of the first coil 110, senses the changes in the magnetic field of the first magnet 220 in real time and feeds back the position information to the control unit. Based on the deviation between the position information and the target position, the control unit dynamically adjusts the current input to the first coil 110 through a closed-loop control algorithm to achieve precise control of the position of the bracket 200 until the lens reaches the target focusing position.

[0103] Optical Image Stabilization (OIS) working process: When the gyroscope detects device jitter, the control unit analyzes the jitter signal and calculates the displacement and direction of the carrier 300 movement required to compensate for the jitter.

[0104] The control unit outputs current to the second coil 120 disposed on the base 100. Two sets of the second coil 120 and the second magnet 320 are each provided, and the extension directions of the two sets of second coils 120 are perpendicular to each other. The current is distributed to the corresponding second coil 120 according to the direction of vibration.

[0105] The second coil 120, when energized, generates a magnetic field that interacts with the second magnet 320 mounted on the carrier 300, producing an anti-shake driving force that propels the carrier 300 to move in a plane. The movement of the carrier 300 relative to the support 200 is guided by a second guiding mechanism: a first set of guide grooves 210 on the support 200 and a second set of guide grooves 310 on the carrier 300 are positioned opposite each other, within which a rolling element 500 rolls. The extension directions of the first set of guide grooves 210 and the second set of guide grooves 310 are perpendicularly intersecting, allowing the carrier 300 to move independently in the X and Y directions. The rolling of the rolling element 500 within the guide grooves ensures low friction and high precision in the movement.

[0106] Simultaneously, the position sensing element 130 senses the position of the second magnet 320 in real time and feeds back the position information of the carrier 300. The control unit adjusts the current of the second coil 120 accordingly to achieve closed-loop control of the carrier 300's movement and accurately compensate for jitter.

[0107] During the movement, the elastic reset component 400 uses its elastic restoring force to make the carrier 300 automatically return to the center position after the anti-shake movement.

[0108] Coordinated operation of autofocus and optical image stabilization: Autofocus and optical image stabilization can be performed simultaneously. For example, while the carrier 300 is compensating for shake through OIS movement, the control unit can simultaneously drive the support 200 to perform AF movement. The two are decoupled and controlled independently through separate coil and magnet components and position sensing element 130, ensuring no interference. Throughout the movement, a multi-limiting structure ensures reliability: First, the magnetic attraction components (adsorption magnet 330 and magnetic conductor 230) generate a continuous attraction force, pulling the carrier 300 towards the support 200, enhancing the stability of the rolling element 500 within the guide groove. Second, the cover plate 700, through the engagement of the slot 710 with the upper limit post 240 of the support 200, provides rigid Z-axis limiting, working in conjunction with the elastic reset element 400 to prevent excessive displacement of the carrier 300. Simultaneously, the symmetrical arrangement of the adsorption magnet 330 and the second magnet 320 about the center of the carrier 300 ensures balanced magnetic attraction, preventing the carrier 300 from deflecting.

[0109] Motion termination and reset: When focusing or image stabilization is complete, the control unit stops the coil current. The restoring force of the elastic reset element 400 pulls the carrier 300 back to the center position. The system returns to standby mode, ready for the next operation.

[0110] In summary, the optical image stabilization motor and camera module disclosed herein have the following advantages: First, the elastic reset component 400, the magnetic suction assembly, and the cover plate 700 limit structure work together to effectively prevent the ball bearing 800 from falling off due to excessive driving force or impact, as is the case in the background technology, thereby improving the product's impact resistance and service life.

[0111] Secondly, the electromagnetic drive based on Lorentz force combined with the ball bearing 800 guide mechanism achieves low friction and smooth movement; the position sensing element 130 and closed-loop control ensure the accuracy of AF and OIS movement, solving the problems of focus blur and inaccurate shake compensation.

[0112] Meanwhile, by optimizing the structural space and mechanical balance through the orthogonal guide slot layout and symmetrical magnet arrangement, the optical image stabilization motor can still achieve the above-mentioned movements in a smaller product volume.

[0113] Finally, the independent drive and sensing modules support simultaneous operation of AF and OIS, meeting the needs of dynamic shooting scenarios and improving the overall performance of the camera module.

[0114] These advantages make this optical image stabilization motor suitable for applications with limited space and high requirements for reliability and precision, such as mobile devices.

[0115] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0116] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. An optical image stabilization motor, characterized in that, include: Base; A bracket, which is movably connected to the base via a first guide mechanism, so as to be able to move in a first direction; The carrier is used to support the lens. The carrier is movably connected to the inside of the bracket through a second guide mechanism and can move in a plane, which is perpendicular to the first direction. as well as An elastic reset member is connected between the carrier and the support, which provides an elastic restoring force to the carrier to bring it toward the center of motion and limits the displacement of the carrier relative to the support in the first direction.

2. The optical image stabilization motor according to claim 1, characterized in that, The second guiding mechanism includes: The first set of guide grooves is formed on the bracket; A second set of guide grooves is formed on the carrier and disposed opposite to the first set of guide grooves; and A rolling element is disposed between the bracket and the carrier, and is disposed within the first set of guide grooves and the second set of guide grooves; In the projection of the first direction, the extension direction of the first set of guide grooves intersects perpendicularly with the extension direction of the second set of guide grooves.

3. The optical image stabilization motor according to claim 2, characterized in that, Optionally, the first set of guide grooves extends parallel to a first horizontal direction, the second set of guide grooves extends parallel to a second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction. Optionally, both the first group of guide slots and the second group of guide slots are arranged in a circular array. Optionally, the first set of guide slots includes at least one slot extending along a first horizontal direction and at least one slot extending along a second horizontal direction; in the second set of guide slots, the slot opposite to the slot in the first horizontal direction extends along the second horizontal direction, and the slot opposite to the slot in the second horizontal direction extends along the first horizontal direction.

4. The optical image stabilization motor according to claim 1, characterized in that, Also includes: A first magnet is disposed on the support. as well as A first coil is disposed on the base. When the first coil is energized, it interacts with the first magnet to generate a focusing driving force that drives the bracket to carry the carrier to move in a first direction.

5. The optical image stabilization motor according to claim 4, characterized in that, Also includes: A second magnet is disposed on the carrier; as well as The second coil is disposed on the base; The second magnet and the second coil are each provided in two sets, and the extension directions of the two sets of the second coil are perpendicular to each other, so as to generate anti-shake driving force to drive the carrier to move in two mutually perpendicular directions in the plane when energized.

6. The optical image stabilization motor according to claim 5, characterized in that, It also includes a position sensing element, which is disposed at the center of the first coil and / or the second coil, for sensing the position information of the first magnet and / or the second magnet, and feeding the position information back to the control unit. The control unit is used to dynamically adjust the current input to the first coil and / or the second coil based on the position information, so as to realize closed-loop control of the movement of the bracket in the first direction and / or the movement of the carrier in the plane.

7. The optical image stabilization motor according to claim 5, characterized in that, Optionally, the device further includes an adsorption magnet and a magnetic conductor. The adsorption magnet is disposed on the carrier, and the magnetic conductor is disposed on the support and positioned opposite to the adsorption magnet to generate a magnetic attraction force. The magnetic attraction force is configured to provide an attraction force pointing towards the support during the movement of the carrier relative to the support. Optionally, the projection of the adsorbing magnet onto a projection plane parallel to the plane at least partially covers the displacement trajectory of the magnetic conductor during the movement; and the magnetic center of the adsorbing magnet coincides with the geometric center of the adsorbing steel sheet in the initial position. Optionally, the adsorbing magnet and at least one of the second magnets are arranged symmetrically about the center of the carrier. Optionally, it also includes a flexible circuit board, which is fixedly disposed on the base and electrically connected to the first coil, the second coil and the position sensing element.

8. The optical image stabilization motor according to claim 1, characterized in that, Optionally, the system further includes a cover plate, wherein a limiting structure is provided between the cover plate and the bracket to limit the displacement of the carrier in the first direction; the limiting structure includes a slot / limiting post disposed on the cover plate and a limiting post / slot disposed on the bracket, wherein the slot engages with the limiting post. Optionally, the elastic reset member is a spring sheet, the spring sheet is provided with a positioning hole, and the carrier and the bracket are provided with positioning posts adapted to the positioning hole. The spring sheet is sleeved on the positioning post through the positioning hole and fixed between the carrier and the bracket.

9. The optical image stabilization motor according to claim 1, characterized in that, The first guiding mechanism includes: The third set of guide grooves is formed on the side of the bracket; A fourth set of guide grooves is formed on the inner side of the base and is opposite to the third set of guide grooves; and Ball bearings, wherein the ball bearings are disposed within the third group of guide grooves and the fourth group of guide grooves; The third and fourth guide grooves are parallel to each other, and their extension directions are parallel to the first direction.

10. A camera module, characterized in that, include: The optical image stabilization motor according to any one of claims 1 to 9; as well as The lens is mounted within the carrier.

Images