Lens driving device

Abstract

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device which comprises a base and a motor mechanism, the motor mechanism comprises a frame which is arranged on the base, an AF coil is arranged on the side wall of one side of the frame, and the AF coil and an AF magnet arranged on the side wall of the base are oppositely arranged so that the frame can move in the third direction relative to the base; the OIS coil plate is arranged in the frame, and an OIS coil is arranged in the OIS coil plate; the carrier is arranged in the frame, the OIS coil plate is located between the carrier and the frame, an OIS magnet is arranged at the bottom end of the carrier, and the OIS magnet and the OIS coil are oppositely arranged so that the carrier can move in the first direction and the second direction relative to the frame. Through an innovative position design mode, magnets adopted by AF zoom operation and anti-shake operation are independent and do not interfere with each other, and the stability of automatic focusing and optical anti-shake control is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical imaging equipment, and in particular relates to a lens driving device. Background Art

[0002] With the advancement of technology, many electronic devices (such as smartphones and digital cameras) now have photo or video recording capabilities. These devices are equipped with lens actuators to drive optical components such as lenses, thereby achieving autofocus and optical image stabilization (OIS) functions.

[0003] Existing lens drive devices typically include an OIS coil mounted on a base, a magnet assembly mounted on a frame, and a zoom coil mounted on a carrier. The OIS coil interacts with the magnet assembly to enable the frame and its carrier to move relative to the base in the X- and Y-axis directions. The zoom coil interacts with the magnet assembly to enable the carrier and its lens to move relative to the frame in the Z-axis direction, thereby achieving three-axis movement of the lens. In this design, zoom and optical image stabilization operations share the same magnet assembly. If the magnets are close together, their internal magnetic fields can interfere with each other, resulting in unintended movement or jitter, reducing the stability of autofocus and optical image stabilization control. Summary of the Invention

[0004] The present invention aims to solve the above technical problems and provides a lens driving device.

[0005] A lens driving device, comprising a base and a motor mechanism, wherein the motor mechanism comprises:

[0006] a frame, the frame being disposed on the base, an AF coil being disposed on a side wall of the frame, the AF coil being disposed opposite to an AF magnet disposed on the side wall of the base, so that the frame can move in a third direction relative to the base;

[0007] An OIS coil plate, wherein the OIS coil plate is arranged in the frame, and an OIS coil is arranged inside the OIS coil plate;

[0008] The carrier is arranged in the frame, the OIS coil plate is located between the carrier and the frame, an OIS magnet is arranged at the bottom end of the carrier, and the OIS magnet is arranged opposite to the OIS coil so that the carrier can move in a first direction and a second direction relative to the frame.

[0009] Optionally, the first direction, the second direction and the third direction are perpendicular to each other.

[0010] Optionally, there are two OIS magnets, and the two OIS magnets are respectively arranged on two adjacent sides of the bottom end of the carrier;

[0011] There are two OIS coils, and the two OIS coils are respectively arranged in two adjacent sides of the OIS coil plate.

[0012] Optionally, the OIS coil plate adopts an L-shaped coil plate.

[0013] Optionally, the motor mechanism further comprises:

[0014] A circuit board is provided in the frame and between the carrier and the frame, the OIS coil board is provided on top of the circuit board, the circuit board is powered by a built-in circuit in the base, the OIS coil is powered by the circuit board, and the AF coil is powered by the circuit board via a built-in circuit in the frame.

[0015] Optionally, the circuit board is an FPC board.

[0016] Optionally, a power-on point is provided on one side of the base, and an elastic member is provided on one side of the circuit board, and the elastic member is connected to the power-on point.

[0017] Optionally, a fixing protrusion is provided on one side of the frame, and a frame guide groove is provided on the outer side of the fixing protrusion;

[0018] A mounting protrusion is provided on one side of the base, a base guide groove is provided on an inner wall of the mounting protrusion, and a guide shaft is provided between the base guide groove and the frame guide groove.

[0019] Optionally, the AF coil is provided on the outer side of the fixing protrusion, and the frame guide groove is located on the side of the AF coil;

[0020] The AF magnet is fixedly arranged on the mounting protrusion, and the base guide groove is located on the side of the AF magnet.

[0021] Optionally, a built-in metal iron sheet is embedded in the fixing protrusion, and the built-in metal iron sheet and the AF magnet are arranged opposite to each other and attract each other.

[0022] Optionally, the motor mechanism further comprises:

[0023] A plurality of upper springs, one end of which is fixedly connected to the top of the carrier, and the other end of which is fixedly connected to the top of the frame or a power rod provided on the frame, wherein the carrier is suspended and supported in the frame by the upper spring or the upper spring and the power rod.

[0024] Optionally, a friction reducing mechanism is provided between the bottom end of the carrier and the frame, and the carrier is supported in the frame by the friction reducing mechanism, and the friction reducing mechanism is a ball, a roller or a lubricating material layer.

[0025] Optionally, the motor mechanism further comprises:

[0026] A top shell, the top shell is located above the carrier, the top shell is detachably connected to the frame, one side of the top shell has a shell avoidance opening, the AF coil is located inside the shell avoidance opening, so that the AF coil is exposed in the top shell.

[0027] Optionally, the lens driving device further includes a position monitoring device, and the position monitoring device includes:

[0028] An AF sensor board, the AF sensor board is disposed in the base, the AF sensor board forms an AF electrode board slot with an opening at the top, and the AF sensor board is powered by a base built-in circuit in the base;

[0029] An AF electrode plate is arranged at the bottom end of the frame, the AF electrode plate is powered by the circuit board through the built-in metal in the frame, and the bottom end of the AF electrode plate is inserted into the AF electrode plate slot.

[0030] Optionally, the lens driving device further includes a position monitoring device, and the position monitoring device includes:

[0031] The carrier has a built-in metal, the built-in metal is arranged in the carrier, and an X-axis electrode plate and a Y-axis electrode plate are arranged at the bottom of the built-in metal;

[0032] An X-axis sensing plate and a Y-axis sensing plate are built into the circuit board on both sides away from the OIS coil plate. The X-axis sensing plate is arranged opposite to the X-axis electrode plate, and the Y-axis sensing plate is arranged opposite to the Y-axis electrode plate.

[0033] Optionally, the built-in metal of the carrier is powered by the circuit board via the power rod and the upper spring, and the X-axis sensing plate and the Y-axis sensing plate are powered by the circuit board.

[0034] Optionally, a control IC chip is provided at the bottom end of the circuit board, and the control IC chip is respectively connected to the OIS coil, the X-axis sensing plate, and the Y-axis sensing plate.

[0035] Optionally, the lens driving device further includes:

[0036] A shell is located above the motor mechanism and is detachably connected to the base.

[0037] Beneficial effects: The present invention has at least one or more of the following advantages:

[0038] 1. This invention abandons the traditional three-axis movement operation in the coil and magnet setting position and driving relationship. The present invention sets the AF magnet on the base, the OIS magnet on the carrier, the AF coil on the frame, and the OIS coil on the OIS coil plate. Through the innovative positioning design, the magnets used for AF zoom operation and anti-shake operation are independent and do not interfere with each other, ensuring the stability of autofocus and optical image stabilization control.

[0039] In addition, when performing AF operation, the AF magnet installed on the base does not need to move, which reduces the overall weight of the frame during AF operation.

[0040] Secondly, since the OIS coil is arranged on the OIS coil plate, there is no need for power-on design on the carrier, which reduces the power-on design layout.

[0041] 2. The position monitoring device of the present invention adopts a capacitor structure to replace the traditional Hall sensor detection. The capacitor structure has high accuracy and can ensure the stability of monitoring.

[0042] When a capacitor structure is used for position monitoring, the capacitor structure of the carrier part is powered by a circuit board via a power rod and an upper spring. The power rod and the upper spring can both support the carrier to form a suspended state to reduce friction when it moves, and power the built-in metal in the carrier. The structure is compact and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a structural explosion diagram of the present invention;

[0044] Figure 2 for Figure 1 Further exploded diagram of

[0045] Figure 3 This is a structural exploded view of the base of the present invention;

[0046] Figure 4 A schematic diagram of circuit connections inside the base of the present invention;

[0047] Figure 5 A schematic structural diagram of the motor mechanism of the present invention;

[0048] Figure 6 for Figure 5 Exploded diagram;

[0049] Figure 7 for Figure 6 Further exploded diagram of

[0050] Figure 8 for Figure 7 Further exploded diagram of

[0051] Figure 9 Schematic diagram of a structure of the carrier of the present invention;

[0052] Figure 10 A diagram showing the positional relationship between the interior of the carrier and the circuit boards of the present invention;

[0053] Figure 11 A schematic diagram of the structure inside the framework of the present invention;

[0054] Figure 12 A top view of the structure of the present invention;

[0055] Figure 13 for Figure 12 AA cross-sectional view. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solutions of the present invention.

[0057] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0058] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0059] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0060] In the following description, the first direction is defined as the X-axis, the second direction is defined as the Y-axis, and the third direction is defined as the Z-axis, which is also the optical axis. The optical axis refers to the direction in which light propagates within an optical element. It is an abstract concept and does not refer to a physical axis.

[0061] Reference Figures 1 to 13 An embodiment of the present invention provides a lens drive device having a central portion provided with a lens through-hole extending along the optical axis (Z-axis). The lens drive device includes a base 10 and a motor mechanism, which includes a frame 20, a carrier 30, and an OIS coil plate 40.

[0062] A motor mechanism is mounted on the base 10, which is driven by electromagnetic force to move the motor mechanism in the Z-axis direction. Specifically, the frame 20 is mounted on the base 10, and an AF coil 51 is mounted on a side wall of the frame 20. The AF coil 51 is positioned opposite an AF magnet 52 mounted on the side wall of the base 10. The AF magnet 52 and the AF coil 51 cooperate to enable the motor mechanism, including the frame 20 and the carrier 30, to move in the Z-axis direction relative to the base 10.

[0063] The OIS coil plate 40 is mounted within the frame 20, housing an OIS coil. The carrier 30 is positioned within the frame 20, with the OIS coil plate 40 positioned between the carrier 30 and the frame 20. An OIS magnet 54 is positioned at the bottom of the carrier 30, facing the OIS coil. The OIS magnet 54 and the OIS coil cooperate to allow the carrier 30 to move within the frame 20 in both the X- and Y-axis directions.

[0064] The lens is installed in the carrier 30, and the three-axis anti-shake operation of the lens is achieved through the three-axis movement of the carrier 30.

[0065] The present invention abandons the setting position and driving relationship of the coils and magnets in the traditional three-axis movement operation. The present invention sets the AF magnet 52 on the base 10, the OIS magnet 54 on the carrier 30, the AF coil 51 on the frame 20, and the OIS coil on the OIS coil plate 40. Through the innovative position design method, the magnets used for the AF zoom operation and the anti-shake operation are independent of each other and do not interfere with each other, ensuring the stability of autofocus and optical image stabilization control.

[0066] Furthermore, during the AF operation, since the AF magnet 52 is provided on the base 10 and does not need to be operated, the overall weight of the frame 20 during the AF operation is reduced.

[0067] Secondly, since the OIS coil is disposed on the OIS coil plate 40 , no power supply design is required on the carrier 30 , thus reducing the power supply design layout.

[0068] In one embodiment, the first direction, namely the X-axis direction, the second direction, namely the Y-axis direction, and the third direction, namely the Z-axis direction, are perpendicular to each other.

[0069] In one embodiment, referring to Figure 8 and Figure 9 There are two OIS magnets 54 , and the two OIS magnets 54 are respectively arranged on two adjacent sides of the bottom end of the carrier 30 .

[0070] Preferably, the carrier 30 is a rectangular structure with a lens mounting hole in the middle. In this case, the two OIS magnets 54 are respectively arranged on the adjacent X-axis direction edges and Y-axis direction edges of the bottom end of the carrier 30.

[0071] Preferably, two groups of OIS magnets 54 are provided, one on each of two adjacent sides of the bottom of the carrier 30. Each group of OIS magnets 54 comprises one or more OIS magnets 54 arranged side by side. In the OIS magnet group 54 located on the X-axis side, one or more magnets have their length oriented in the X-axis direction and are arranged side by side along the Y-axis. In the OIS magnet group 54 located on the Y-axis side, one or more magnets have their length oriented in the Y-axis direction and are arranged side by side along the X-axis.

[0072] In one embodiment, a groove is provided at the bottom end of the carrier 30 , and an OIS magnet 54 is installed in the groove.

[0073] In one embodiment, referring to Figure 8 The OIS coil plate 40 adopts a coil plate with an L-shaped structure.

[0074] In one embodiment, referring to Figures 7 to 13 , the motor mechanism further includes a circuit board 60,

[0075] The circuit board 60 is positioned within the frame 20 and between the carrier 30 and the frame 20. The OIS coil plate 40 is positioned atop the circuit board 60. From bottom to top, the following diagrams represent the frame 20, the circuit board 60, the OIS coil plate 40, and the carrier 30. The circuit board 60 is powered by the built-in circuitry 11 within the base 10. The OIS coil is powered by the circuit board 60. The AF coil 51 is powered by the circuit board 60 via the built-in circuitry within the frame 20.

[0076] In one embodiment, the circuit board 60 is an FPC board.

[0077] In one embodiment, referring to Figure 2 and Figure 3 , a power point 12 is provided on one side of the base 10, refer to Figures 5 to 8 An elastic member 61 is provided on one side of the circuit board 60, and the elastic member 61 is connected to the power point 12 to realize current transmission.

[0078] Of course, the elastic member 61 is a metal member, and the elastic member 61 is preferably made integrally with the circuit board 60. The design of the elastic member 61 can keep the circuit 60 energized without disconnecting the circuit when the frame 20 and the carrier 30 move longitudinally.

[0079] In one embodiment, referring to Figures 5 to 8 A fixing protrusion 21 is provided on one side of the frame 20 , and a frame guide groove 22 is provided on the outer side of the fixing protrusion 21 .

[0080] Reference Figures 2 to 3 The base 10 has a mounting protrusion 13 on one side, and a base guide groove 14 is provided on the inner wall of the mounting protrusion 13. The frame guide groove 22 is arranged opposite to the base guide groove 14 in the inner and outer sides. A guide shaft 70 is provided between the frame guide groove 22 and the base guide groove 14. When the motor mechanism moves in the Z-axis direction, it is guided by the guide shaft 70.

[0081] Of course, a guide device such as a ball bearing may also be provided between the frame guide groove 22 and the base guide groove 14 .

[0082] In one embodiment, referring to Figures 5 to 8 An AF coil 51 is provided outside the fixing protrusion 21 , and two frame guide grooves 22 are respectively located on both sides of the AF coil 51 .

[0083] Reference Figures 2 to 3 An AF magnet 52 is fixedly mounted on the mounting protrusion 13 , and two base guide grooves 14 are respectively located on both sides of the AF magnet 52 .

[0084] In one embodiment, referring to Figure 11 A built-in metal iron sheet 23 is embedded in the fixing protrusion 21, and the built-in metal iron sheet 23 and the AF magnet 52 are arranged opposite to each other and attract each other.

[0085] Since an adsorption force is generated between the built-in metal iron sheet 23 and the AF magnet 52 , the adsorption force can bring the fixing protrusion 21 and the mounting protrusion 13 closer to each other, thereby preventing the guide shaft 70 from being separated from the frame guide groove 22 or the base guide groove 14 .

[0086] In one embodiment, referring to Figures 6 to 8The motor mechanism further includes a plurality of upper springs 80, one end of which is fixedly connected to the top of the carrier 30. The frame 20 is provided with a plurality of energizing rods 81, the other end of which is fixedly connected to the top of the energizing rods 81. The upper springs 80 and the energizing rods 81 support the carrier 30 in the air within the frame 20. In this embodiment, the upper springs 80 and the energizing rods 81 support the carrier 30, creating a suspended state for the carrier 30 to reduce friction during movement.

[0087] The number of upper springs 80 can be determined according to the shape and specifications of the carrier 30 during specific implementation. For example, when the carrier 30 is a rectangular structure, an upper spring 80 can be fixedly connected to each of the four corners of the carrier 30. At this time, the frame 20 can adopt a rectangular frame structure, and a power rod 81 can also be set at each of the four corners of the frame 20.

[0088] Of course, the power rod 81 may not be provided on the frame 20. The upper spring 80 is designed to be fixed to the top of the frame 20 and the top of the carrier 30 at the same time, so as to play an auxiliary reset effect under the action of elastic force after the carrier 30 moves.

[0089] In addition to using the power rod 81 as a support design between the frame 20 and the carrier 30, other structural designs can also be used as a replacement. For example, a friction reducing mechanism is provided between the bottom end of the carrier 30 and the frame 20. The carrier 30 is supported in the frame 20 by the friction reducing mechanism to reduce friction. The friction reducing mechanism includes but is not limited to balls, rollers or lubricating material layers, etc., which can also achieve the technical effect of this embodiment.

[0090] In one embodiment, referring to Figures 5 to 8 The motor mechanism also includes a top shell 90, which is located above the carrier 30. The top shell 90 is detachably connected to the frame 20. A shell avoidance opening 91 is provided on one side of the top shell 90. The AF coil 51 is located inside the shell avoidance opening 91, so that the AF coil 51 is exposed to the top shell 90, which facilitates the driving action in the AF direction.

[0091] The top shell 90 is preferably snap-fitted with the frame 20 to form a motor accommodating cavity, and the carrier 30, OIS coil plate 40, AF coil 51, OIS magnet 54, circuit board 60, upper spring 80, and power rod 81 are all located in the motor accommodating cavity, wherein the AF coil 51 is exposed in the motor accommodating cavity.

[0092] The design of the top shell 90 can make the motor mechanism form an integral structure. Of course, in the design, the top shell 90 can also be not provided to make the whole motor work normally.

[0093] In one embodiment, the lens driving device further includes a position monitoring device, which includes an AF sensing plate 55 and an AF electrode plate 56 .

[0094] Reference Figures 2 to 4 The AF sensor board 55 is disposed within the base 10. The AF sensor board 55 forms an AF electrode board slot 551 with an opening at the top. The AF sensor board 55 is powered by the base built-in circuit 11 within the base 10. In a specific implementation, the AF sensor board 55 can be configured as a U-shaped structure with an opening facing upward to form the AF electrode board slot 551, and the AF electrode board slot 551 is exposed from the base 10.

[0095] Figures 5 to 8 as well as Figure 11 The AF electrode plate 56 is set at the bottom end of the frame 20. The AF electrode plate 56 is powered by the circuit board 60 through the frame built-in metal 24 in the frame 20. The bottom end of the AF electrode plate 56 is inserted into the AF electrode plate slot 551.

[0096] After the AF electrode plate 56 is inserted into the AF electrode plate slot 551, it will be arranged opposite to the AF sensing plate 55. The AF electrode plate 56 and the AF sensing plate 55 form a capacitor structure. After the frame 20 moves in the Z axis, the capacitance value of the capacitor structure will change. Based on the change, the Z axis movement position of the frame 20 and the carrier 30 can be judged, thereby realizing the effect of a Z axis direction position sensor.

[0097] In one embodiment, a Z-axis control IC chip is provided in the base 10 , and the Z-axis control IC chip is connected to the AF sensing board 55 to receive the sensing capacitance value in the Z-axis direction, thereby realizing position monitoring in the Z-axis direction.

[0098] The Z-axis control IC chip is also connected to the AF coil 51 through the circuit board 60 and the frame's built-in circuit, thereby controlling the power-on state of the AF coil 51 .

[0099] In one embodiment, the lens driving device further includes a position monitoring device, which includes a carrier built-in metal 31 , an X-axis electrode plate 57 , a Y-axis electrode plate 58 , an X-axis sensing plate 59 , and a Y-axis sensing plate 510 .

[0100] Reference Figure 10 The carrier built-in metal 31 is disposed within the carrier 30, and an X-axis electrode plate 57 and a Y-axis electrode plate 58 are disposed at the bottom end of the carrier built-in metal 31. Of course, the X-axis electrode plate 57 is disposed in the X-axis direction and its length direction is the X-axis direction, and the Y-axis electrode plate 58 is disposed in the Y-axis direction and its length direction is the Y-axis direction.

[0101] Reference Figure 10 The circuit board 60 has X-axis sensing plates 59 and Y-axis sensing plates 510 built into the two sides away from the OIS coil plate 40. The X-axis sensing plates 59 are arranged opposite to the X-axis electrode plates 57, and the Y-axis sensing plates 510 are arranged opposite to the Y-axis electrode plates 58.

[0102] The X-axis sensing plate 59 and the X-axis electrode plate 57 are arranged relative to each other to form an X-axis direction capacitance structure, and the Y-axis sensing plate 510 and the Y-axis electrode plate 58 are arranged relative to each other to form a Y-axis direction capacitance structure. When the carrier 30 and the carrier's built-in metal 31 move in the X-axis direction and the Y-axis direction, the position of the carrier 30 in the X-axis direction and the Y-axis direction can be monitored through the capacitance value between the X-axis sensing plate 59 and the X-axis electrode plate 57, and the capacitance value between the Y-axis sensing plate 510 and the Y-axis electrode plate 58.

[0103] like Figure 10 As shown, a plurality of X-axis electrode plates 57 can be provided, for example, three, and the plurality of X-axis electrode plates 57 are arranged side by side along the X-axis. The lengths of the plurality of X-axis electrode plates 57 can be the same or different. A plurality of X-axis sensing plates 59 can be provided, for example, two, and the two X-axis sensing plates 59 are arranged side by side along the Y-axis. Similarly, a plurality of Y-axis electrode plates 58 can be provided, for example, three, and the plurality of Y-axis electrode plates 58 are arranged side by side along the Y-axis. The lengths of the plurality of Y-axis electrode plates 58 can be the same or different. A plurality of Y-axis sensing plates 510 can be provided, for example, two, and the two Y-axis sensing plates 510 are arranged side by side along the X-axis.

[0104] In one embodiment, the carrier built-in metal 31 is powered by the circuit board 60 through the power rod 81 and the upper spring 80 , and the X-axis sensing plate 59 and the Y-axis sensing plate 510 are powered by the circuit board 60 .

[0105] Since the circuit board 60 and the energizing rod 81 are respectively fixed on the frame 20, a current path can be conveniently established between the two. The two can be directly connected or indirectly connected via a circuit built into the frame.

[0106] In one embodiment, referring to Figure 10 A control IC chip 511 is provided at the bottom of the circuit board 60, and the control IC chip 511 is connected to the OIS coil, the X-axis sensing plate 59, and the Y-axis sensing plate 510 respectively.

[0107] The control IC chip 511 can control the power supply state of the OIS coil in the OIS coil plate 50 and can also receive the inductive capacitance values ​​in the X-axis direction and the Y-axis direction, thereby realizing position monitoring in the X-axis direction and the Y-axis direction.

[0108] In one embodiment, referring to Figure 1 and Figure 2 、 Figure 12 and Figure 13 The lens driving device further includes a housing 100 , which is located above the motor mechanism and is detachably connected to the base 10 .

[0109] The shell 100 is preferably snap-fitted with the frame 20 to form a drive accommodating cavity. The motor mechanism is arranged in the drive accommodating cavity. The motor mechanism can perform movement operations in the Z-axis direction in the drive accommodating cavity. The carrier 30 in the motor mechanism can perform movement operations in the X-axis and Y-axis directions relative to the frame 20 in the drive accommodating cavity.

[0110] The design of the housing 100 allows the lens driving device to form an integral structure. In the design, the entire lens driving device can also work normally without the housing 100.

[0111] While the preferred embodiments of the present invention have been described in detail above, it should be understood that, after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. Such equivalents also fall within the scope of the claims appended hereto.

Claims

1. A lens driving device, characterized in that: The lens driving device includes a base and a motor mechanism, and the motor mechanism includes: a frame, the frame being disposed on the base, an AF coil being disposed on a side wall of the frame, the AF coil being disposed opposite to an AF magnet disposed on the side wall of the base, so that the frame can move in a third direction relative to the base; An OIS coil plate, wherein the OIS coil plate is arranged in the frame, and an OIS coil is arranged inside the OIS coil plate; The carrier is arranged in the frame, the OIS coil plate is located between the carrier and the frame, an OIS magnet is arranged at the bottom end of the carrier, and the OIS magnet is arranged opposite to the OIS coil so that the carrier can move in a first direction and a second direction relative to the frame.

2. The lens driving device according to claim 1, wherein: The first direction, the second direction and the third direction are perpendicular to each other; And / or, there are two OIS magnets, and the two OIS magnets are respectively arranged on two adjacent sides of the bottom end of the carrier; there are two OIS coils, and the two OIS coils are respectively arranged in two adjacent sides of the OIS coil plate; And / or, the OIS coil plate adopts an L-shaped coil plate.

3. The lens driving device according to claim 1, wherein: The motor mechanism further comprises: A circuit board is provided in the frame and between the carrier and the frame, the OIS coil board is provided on top of the circuit board, the circuit board is powered by a built-in circuit in the base, the OIS coil is powered by the circuit board, and the AF coil is powered by the circuit board via a built-in circuit in the frame.

4. The lens driving device according to claim 3, wherein: The circuit board adopts an FPC board; And / or, a power-on point is provided on one side of the base, and an elastic member is provided on one side of the circuit board, and the elastic member is connected to the power-on point.

5. The lens driving device according to claim 1, wherein: A fixing protrusion is provided on one side of the frame, and a frame guide groove is provided on the outer side of the fixing protrusion; a mounting protrusion is provided on one side of the base, and a base guide groove is provided on the inner wall of the mounting protrusion, and a guide shaft is provided between the base guide groove and the frame guide groove.

6. The lens driving device according to claim 5, wherein: The AF coil is arranged on the outside of the fixing protrusion, and the frame guide groove is located on the side of the AF coil; the AF magnet is fixedly arranged on the mounting protrusion, and the base guide groove is located on the side of the AF magnet; And / or, a built-in metal iron sheet is pre-embedded in the fixing protrusion, and the built-in metal iron sheet and the AF magnet are arranged opposite to each other and attract each other.

7. The lens driving device according to claim 1, wherein: The motor mechanism further includes: a plurality of upper springs, one end of each upper spring being fixedly connected to the top of the carrier, and the other end of each upper spring being fixedly connected to the top of the frame or a power rod provided on the frame, so that the carrier is suspended and supported within the frame by the upper springs or the upper springs and the power rods; And / or, a friction reducing mechanism is provided between the bottom end of the carrier and the frame, and the carrier is supported in the frame by the friction reducing mechanism, and the friction reducing mechanism is a ball, a roller or a lubricating material layer; And / or, the motor mechanism further comprises: a top housing, the top housing being located above the carrier, the top housing being detachably connected to the frame, the top housing having a housing avoidance opening on one side, the AF coil being located inside the housing avoidance opening such that the AF coil is exposed from the top housing; And / or, the lens driving device further includes: a housing, the housing is located above the motor mechanism, and the housing is detachably connected to the base.

8. The lens driving device according to any one of claims 1 to 7, wherein: The lens driving device further includes a position monitoring device, and the position monitoring device includes: An AF sensor board, the AF sensor board is disposed in the base, the AF sensor board forms an AF electrode board slot with an opening at the top, and the AF sensor board is powered by a base built-in circuit in the base; An AF electrode plate, the AF electrode plate being arranged at the bottom end of the frame, the AF electrode plate being powered by the circuit board via the frame-built-in metal in the frame, and the bottom end of the AF electrode plate being inserted into the AF electrode plate slot; And / or, the lens driving device further includes a position monitoring device, and the position monitoring device includes: The carrier has a built-in metal, the built-in metal is arranged in the carrier, and an X-axis electrode plate and a Y-axis electrode plate are arranged at the bottom of the built-in metal; An X-axis sensing plate and a Y-axis sensing plate are built into the circuit board on both sides away from the OIS coil plate. The X-axis sensing plate is arranged opposite to the X-axis electrode plate, and the Y-axis sensing plate is arranged opposite to the Y-axis electrode plate.

9. The lens driving device according to claim 8, wherein: The motor mechanism further comprises: A plurality of upper springs, one end of each upper spring being fixedly connected to the top of the carrier, and the other end of each upper spring being fixedly connected to a power rod provided on the frame, so that the carrier is suspended and supported in the frame by the upper springs and the power rod; The carrier built-in metal is powered by the circuit board through the power rod and the upper spring piece, and the X-axis sensing plate and the Y-axis sensing plate are powered by the circuit board.

10. The lens driving device according to claim 8, wherein: A control IC chip is provided at the bottom of the circuit board, and the control IC chip is respectively connected to the OIS coil, the X-axis sensing plate, and the Y-axis sensing plate.

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