Lens driving device

Abstract

This invention belongs to the field of optical imaging equipment technology, specifically relating to a lens driving device, including a base, a frame, and a carrier. The carrier moves relative to the frame in a first direction and a second direction within the frame through the cooperation of an OIS magnet and an OIS coil. The frame moves relative to the base in a third direction on the base through a piezoelectric mechanism. The first, second, and third directions are mutually perpendicular. This invention, through innovative position design and different driving methods, enables zoom operation to be driven by an independent piezoelectric mechanism, and image stabilization operation to be achieved using an independent magnet and coil. Zoom operation and image stabilization operation are independent and do not interfere with each other, ensuring the stability of autofocus and optical image stabilization control.

Description

Technical Field

[0001] This utility model belongs to the field of optical imaging equipment technology, and specifically relates to a lens driving device. Background Technology

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

[0003] Existing lens drive mechanisms typically include an OIS coil mounted on the base, a magnet group mounted on the frame, and a zoom coil mounted on the carrier. The interaction between the OIS coil and the magnet group enables the frame and the carrier mounted on it to move relative to the base along the X and Y axes. The interaction between the zoom coil and the magnet group enables the carrier and the lens mounted on it to move relative to the frame along the Z axis, thus achieving three-axis lens movement. In this design, zoom and image stabilization operations share the same magnet group. If the magnets are too close together, their internal magnetic fields can interfere with each other, causing unintended displacement or shaking, reducing the stability of autofocus and optical image stabilization control. Utility Model Content

[0004] The present invention addresses the aforementioned technical problems by providing a lens driving device.

[0005] A lens driving device includes a base, a frame, and a carrier. The carrier moves within the frame in a first direction and a second direction relative to the frame through the cooperation of an OIS magnet and an OIS coil. The frame moves on the base in a third direction relative to the base through a piezoelectric mechanism.

[0006] The first direction, the second direction, and the third direction are all perpendicular to each other.

[0007] Optionally, the piezoelectric mechanism includes a piezoelectric block and a friction rod. The piezoelectric block is disposed on the base, and the friction rod is connected to the piezoelectric block. The friction rod abuts against one side of the frame. When the piezoelectric block is energized and deformed, the friction rod drives the frame and the carrier on it to move in a third direction.

[0008] Optionally, a friction rod guide groove is provided on the outer wall of the frame, and spring contact points are provided on the outer wall of the frame on both sides of the friction rod guide groove;

[0009] The piezoelectric mechanism further includes a spring, the two ends of which are respectively connected to the spring connection points on both sides of the friction rod guide groove. The friction rod is located between the spring and the friction rod guide groove, and the inner wall of the friction rod abuts against the friction rod guide groove.

[0010] When the piezoelectric block is energized and deformed, the friction rod drives the spring and the frame to move in a third direction.

[0011] Optionally, the piezoelectric mechanism further includes a counterweight plate, the piezoelectric block is mounted on the counterweight plate, and both the counterweight plate and the piezoelectric block are mounted on the piezoelectric mechanism mounting port provided on the base.

[0012] Optionally, the base is provided with a built-in circuit, which is connected to the piezoelectric block and supplies power to the piezoelectric block through the built-in circuit.

[0013] Alternatively, the lens driving device may also include a circuit board surrounding the outside of the base, which supplies power to the piezoelectric block via built-in circuitry within the base.

[0014] Optionally, the circuit board is an FPC board.

[0015] Optionally, the lens driving device further includes two oppositely arranged inclined support members, the opposite surfaces of the two inclined support members are wedge-shaped inclined surfaces, and inclined support blocks are respectively provided on both sides of the bottom end of the frame. The inclined support blocks are provided with support block inclined surfaces. The frame is placed on the upper end of the two inclined support members, and the support block inclined surfaces are in contact with the wedge-shaped inclined surfaces.

[0016] The piezoelectric mechanism is provided at a diagonal position on the base. The two piezoelectric mechanisms abut against a corresponding inclined support member. The piezoelectric mechanism drives the inclined support member to move in a first direction or a second direction. When the two inclined support members move relatively closer or relatively farther away under the drive of the two piezoelectric mechanisms, the frame moves in a third direction.

[0017] Optionally, the piezoelectric mechanism includes a piezoelectric block and a friction rod. The piezoelectric block is disposed on the base, and the friction rod is connected to the piezoelectric block. The friction rod abuts against one side of the inclined support member. When the piezoelectric block is energized and deformed, the friction rod drives the inclined support member to move in a first direction or a second direction.

[0018] Optionally, the piezoelectric mechanism further includes an elastic clamping plate, the inner sidewall of which is detachably connected to one side of the inclined support member, and the outer inner wall of which abuts against the outer side of the friction rod. The friction rod and the inclined support member are brought into contact by the elastic clamping plate, so that after the piezoelectric block is energized, the friction rod drives the inclined support member to move in a first direction or a second direction.

[0019] Optionally, base guide rods are fixedly installed on two opposite sides of the base, and the length direction of the base guide rods is either a first direction or a second direction;

[0020] The bottom end of the inclined support member is provided with a support member guide groove on the side away from the piezoelectric mechanism. The two support member guide grooves are slidably connected to a corresponding base guide rod. When one side of the inclined support member moves in the first or second direction driven by the piezoelectric mechanism, the other side of the inclined support member moves along the corresponding base guide rod through the support member guide groove.

[0021] Optionally, the lens driving device further includes a housing, which is detachably connected to the outside of the base and has a hollow cavity between it and the base. The frame, the carrier, the OIS magnet, the OIS coil, the two inclined support members and the piezoelectric mechanism are all disposed in the hollow cavity. The housing is a metal housing made of metal material.

[0022] An adsorption magnet is provided on one side of the inclined support member, and a base clearance hole is provided on the base outside the adsorption magnet. The adsorption magnet is attracted to the metal shell through the base clearance hole.

[0023] Optionally, inclined guide grooves are provided on both the inclined surface of the support block and the inclined surface of the wedge, and a friction-reducing device is provided between the two inclined guide grooves arranged opposite each other.

[0024] Optionally, the friction-reducing device is a ball bearing or a roller.

[0025] Optionally, one of the inclined surfaces of the support block and the wedge-shaped inclined surface is provided with an inclined protrusion and the other is provided with an inclined groove, the inclined groove being disposed within the inclined protrusion.

[0026] Optionally, both the beveled protrusions and the beveled grooves are coated with a lubricating plating.

[0027] Optionally, OIS magnets are provided on the outer walls of both sides of the carrier, and OIS coils are provided on the base or on the circuit board surrounding the outside of the base. The OIS coils pass through the frame and are positioned opposite to the corresponding OIS magnets.

[0028] Optionally, a zoom-sensing magnet is provided on one side of the carrier, and a zoom position sensor is provided on the base or the circuit board, with the zoom position sensor being disposed opposite to the zoom-sensing magnet.

[0029] Optionally, an OIS position sensor is provided inside the OIS coil, and the OIS position sensor is arranged opposite to a corresponding OIS magnet.

[0030] Optionally, the lens driving device further includes a bracket, the carrier is disposed on the bracket, a first directional guide groove is provided at the top end of the bracket and the bottom end of the carrier, a friction-reducing device is provided between the two first directional guide grooves arranged vertically opposite each other, the bracket is disposed on the frame, a second directional guide groove is provided at the bottom of the bracket and inside the frame, and another friction-reducing device is provided between the two second directional guide grooves arranged vertically opposite each other.

[0031] Optionally, the friction-reducing device is a ball bearing or a roller.

[0032] Optionally, one of the top end of the bracket and the bottom end of the carrier is provided with a first protrusion and the other is provided with a first groove, wherein the first groove is disposed within the first protrusion;

[0033] The bottom of the bracket and the frame are provided with a second protrusion and a second groove, the second groove being disposed within the second protrusion.

[0034] Optionally, the surfaces of the first protrusion, the first groove, the second protrusion, and the second groove are all coated with a lubricating plating layer.

[0035] Optionally, the OIS magnet is divided into a first-direction magnet and a second-direction magnet, and the OIS coil is divided into a first-direction coil and a second-direction coil;

[0036] The top of the frame is respectively provided with the first directional coil and the second directional coil, and the bottom of the carrier is provided with the first directional magnet, which is positioned opposite to the first directional coil.

[0037] The lens driving device also includes a bracket, the carrier is disposed on the bracket, the bracket is disposed on the frame, and a second directional magnet is disposed at the bottom end of the bracket, the second directional magnet being disposed opposite to the second directional coil.

[0038] Optionally, the first directional coil and the second directional coil are powered by frame-in-frame wiring within the frame or by a circuit board.

[0039] Optionally, a support guide rod is fixedly installed on the side of the support away from the second direction magnet, and the length direction of the support guide rod is the first direction. A carrier guide groove is provided on the bottom end of the carrier away from the first direction magnet. The carrier guide groove is slidably connected to the support guide rod. When the carrier moves relative to the support in the first direction under the cooperation of the first direction coil and the first direction magnet, the carrier guide groove slides along the support guide rod.

[0040] A frame guide rod is fixedly installed on the side of the frame away from the first direction coil and the second direction coil. The length direction of the frame guide rod is the second direction. A bracket guide groove is provided on the bottom end of the bracket away from the second direction magnet and the bracket guide rod. The bracket guide groove is slidably connected to the frame guide rod. When the bracket and the carrier on it move in the second direction relative to the frame under the cooperation of the second direction coil and the second direction magnet, the bracket guide groove slides along the frame guide rod.

[0041] Optionally, each of the four corners of the frame is provided with a hanging ring, the carrier is sleeved in the frame, and the top of the carrier is connected to the hanging ring by an upper spring, so that the carrier is suspended in the frame;

[0042] The OIS magnets are provided on the outer walls of both sides of the carrier, and the OIS coils are provided on the inner walls of both sides of the frame. The OIS coils are arranged opposite to the corresponding OIS magnets.

[0043] Optionally, the OIS coil is powered by frame-in-frame wiring within the frame or by a circuit board.

[0044] Optionally, a friction-reducing groove is provided between the bottom end of the carrier and the bottom end of the inner frame, a friction-reducing device is provided between the two friction-reducing grooves arranged opposite each other, and an upper spring is connected between the top end of the carrier and the top end of the frame.

[0045] The OIS magnet is provided at the bottom of the carrier, and the OIS coil is provided at the top of the frame. The OIS coil is arranged opposite to the corresponding OIS magnet.

[0046] Optionally, the friction-reducing device is a ball bearing or a roller.

[0047] Beneficial effects: This utility model has at least one or more of the following advantages:

[0048] 1. This utility model abandons the traditional three-axis movement operation where the coil and magnet are positioned and driven. The first and second directions of movement are achieved by the cooperation of OIS magnet and OIS coil between the carrier and the frame. The third direction of movement is achieved by a piezoelectric mechanism between the base and the frame. Through innovative position design and different driving methods, the zoom operation is driven by an independent piezoelectric mechanism, and the image stabilization operation is achieved by an independent magnet and coil. The zoom operation and image stabilization operation are independent of each other and do not interfere with each other, ensuring the stability of autofocus and optical image stabilization control.

[0049] 2. In addition to adopting a design similar to the traditional design, the piezoelectric mechanism of this utility model also innovatively designs a method to achieve the purpose of moving the frame and other components within the frame in a third direction by the horizontal relative movement of the inclined support members. Compared with the traditional design, the frame moves more smoothly and stably because it is effectively supported by two oppositely arranged inclined support members.

[0050] 3. In the design of different positions of OIS magnet and OIS coil, no OIS coil is set on the carrier side, so that there is no need for power supply design on the carrier, reducing the power supply design layout. Attached Figure Description

[0051] Figure 1 This is a bottom view of Embodiment 1 of the present utility model;

[0052] Figure 2 for Figure 1 AA section view;

[0053] Figure 3 for Figure 1 An exploded view;

[0054] Figure 4 for Figure 3 Further exploded view;

[0055] Figure 5 for Figure 4 Further exploded view;

[0056] Figure 6 This is an exploded view showing the positional relationship between the frame, support, and carrier in Example 1;

[0057] Figure 7 for Figure 6 Further exploded view;

[0058] Figure 8 for Figure 7 Another perspective illustration;

[0059] Figure 9 This is a cross-sectional view of Embodiment 2 of the present invention;

[0060] Figure 10 This is an exploded view of Example 2;

[0061] Figure 11 This is an exploded view showing the positional relationship between the frame, support, and carrier in Example 2;

[0062] Figure 12 for Figure 11 Further exploded view;

[0063] Figure 13 for Figure 12 Another perspective illustration;

[0064] Figure 14 This is a schematic diagram showing the bottom positional relationship between the frame and the carrier in Example 2;

[0065] Figure 15 for Figure 14 Exploded view;

[0066] Figure 16 This is a cross-sectional view of embodiment 3 of the present invention;

[0067] Figure 17 This is an exploded view of Example 3;

[0068] Figure 18 for Figure 17 Further exploded view;

[0069] Figure 19 This is an exploded view showing the positional relationship between the frame, carrier, and upper spring in Example 3;

[0070] Figure 20 This is a cross-sectional view of embodiment 4 of the present invention;

[0071] Figure 21 This is an exploded view of Example 4;

[0072] Figure 22 for Figure 21 Further exploded view;

[0073] Figure 23 This is an exploded view showing the positional relationship between the frame, carrier, and upper spring in Example 4;

[0074] Figure 24 This is a schematic diagram of a structure at the bottom of the carrier in Example 4;

[0075] Figure 25 This is a cross-sectional view of embodiment 5 of the present invention;

[0076] Figure 26 This is an exploded view of Example 5;

[0077] Figure 27 for Figure 26 Further exploded view;

[0078] Figure 28 This is an exploded view showing the positional relationship between the base, piezoelectric mechanism, and inclined support in Example 5.

[0079] Figure 29 This is an exploded view showing the positional relationship between the frame, support, and carrier in Example 5;

[0080] Figure 30 for Figure 29 Another perspective diagram. Detailed Implementation

[0081] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0082] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0083] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0084] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0085] In the following description, the third direction is defined as the direction along the optical axis of the lens, that is, the direction of the vertical line when the base 20 is normally placed, which is the longitudinal direction or the up and down direction. The first direction and the second direction are perpendicular to each other and both are perpendicular to the third direction. The first direction and the second direction are both parallel to the lower surface of the base 20. A coordinate system can be defined with the first direction as the X-axis direction, the second direction as the Y-axis direction and the third direction as the Z-axis direction.

[0086] Example 1:

[0087] Reference Figures 1 to 8 This embodiment provides a lens driving device, which includes a housing 10, a base 20, a frame 30, a carrier 40, and a driving mechanism. The driving mechanism includes an OIS driving mechanism and a piezoelectric mechanism. The OIS driving mechanism includes an OIS magnet 51 and an OIS coil 52.

[0088] The outer shell 10 is an optional structure. The outer shell 10 covers the outside of the base 20. The outer shell 10 and the base 20 are detachably connected and form a hollow cavity. The frame 30, the carrier 40, and the drive mechanism are all housed within the hollow cavity. Preferably, the outer shell 10 and the base 20 form the hollow cavity by fastening together.

[0089] The housing 10, base 20, frame 30, and carrier 40 all have a longitudinally connected lens through-hole along the Z-axis in their middle sections to avoid or accommodate the lens. The lens is mounted inside the carrier 40, which is located within the frame 30. The carrier 40 moves relative to the frame 30 in the X and Y axes through the cooperation of the OIS magnet 51 and OIS coil 52, achieving image stabilization for the lens. Driven by a piezoelectric mechanism, the frame 30 moves the carrier 40 relative to the base 20 in the Z-axis direction, achieving zoom effect for the lens. Ultimately, the three-axis movement of the lens is achieved through the three-axis movement of the carrier 40.

[0090] This invention abandons the traditional three-axis movement operation by specifying the positions and driving relationships of the coils and magnets. Instead, it achieves movement in the X and Y axes through the cooperation of the OIS magnet 51 and the OIS coil 52 between the carrier 40 and the frame 30. A piezoelectric mechanism is used between the base 20 and the frame 30 to achieve movement in the Z axis. Through innovative position design and different driving methods, zoom operation is driven by an independent piezoelectric mechanism, and image stabilization operation is achieved by an independent magnet and coil. Zoom operation and image stabilization operation are independent of each other and do not interfere with each other, ensuring the stability of autofocus and optical image stabilization control.

[0091] In one embodiment, reference is made to Figures 3 to 5The piezoelectric mechanism includes a first piezoelectric block 53 and a first friction rod 54. The first piezoelectric block 53 is mounted on the base 20, and the first friction rod 54 is connected to the first piezoelectric block 53. The first friction rod 54 abuts against one side of the frame 30. When the first piezoelectric block 53 is energized, it will deform and return to its original shape after the power is turned off. When the first piezoelectric block 53 is energized and deformed, the first friction rod 54 will stretch, thereby driving the frame 30 and the carrier 40 on it to move in the Z-axis direction, realizing the zoom operation of the lens mounted on the carrier 40.

[0092] In one embodiment, reference is made to Figures 4 to 8 A friction rod guide groove 31 is provided on the outer wall of the frame 30, and spring contact points 32 are provided on the outer walls of the frame 30 on both sides of the friction rod guide groove 31.

[0093] The piezoelectric mechanism also includes a spring plate 55, with both ends of the spring plate 55 connected to spring plate connection points 32 on both sides of the friction rod guide groove 31. The first friction rod 54 is located between the spring plate 55 and the friction rod guide groove 31, and under the action of the spring plate 55, the inner wall of the first friction rod 54 is tightly abutted against the friction rod guide groove 31. When the first piezoelectric block 53 is energized and deformed, the first friction rod 54 moves in the Z-axis direction, driving the spring plate 55 and the frame 30 to move in the Z-axis direction together.

[0094] In one embodiment, reference is made to Figures 3 to 5 The piezoelectric mechanism also includes a counterweight plate 56, and a first piezoelectric block 53 is mounted on the counterweight plate 56. Both the counterweight plate 56 and the first piezoelectric block 53 are mounted on the piezoelectric mechanism mounting port 23 provided on the base 20.

[0095] In one embodiment, the base 20 is provided with a built-in circuit, which is connected to the first piezoelectric block 53 and supplies power to the first piezoelectric block 53 through the built-in circuit.

[0096] The base has several wire connection terminals built into it, which extend out of the base 20 or the hollow cavity for connection with external wiring.

[0097] In one embodiment, reference is made to Figures 3 to 5 The lens driving device also includes a circuit board 60, which surrounds the outside of the base 20 and supplies power to the first piezoelectric block 53 through the base built-in circuitry within the base 20.

[0098] When the lens drive device has a housing 10, the circuit board 60 is fitted between the housing 10 and the base 20. A portion of the circuit board 60 may extend out of the hollow cavity formed by the housing 10 and the base 20 for connection to external circuitry.

[0099] Circuit board 60 is preferably made of FPC board.

[0100] In one embodiment, the OIS drive mechanism is designed with the following structure:

[0101] Reference Figure 5 , Figure 6 and Figure 8 OIS magnets 51 are disposed on the outer walls of both sides of the carrier 40, and preferably two OIS magnets 51 are disposed on adjacent outer walls of the carrier 40. (Refer to...) Figure 4 and Figure 5 An OIS coil 52 is disposed on a circuit board 60 surrounding the outer side of the base 20. Two OIS coils 52 are preferably disposed on two adjacent sides of the circuit board 60. That is, the circuit board 60 preferably has at least two interconnected sides. The OIS coils 52 pass through the frame 30 and are disposed opposite to corresponding OIS magnets 51.

[0102] In practical implementation, clearance openings can be provided on the side wall of the base 20 and the side wall of the frame 30 so that the OIS coil 52 can pass through the frame 30 and be positioned opposite to the corresponding OIS magnet 51, so that there are no obstructions between the OIS coil 52 and the OIS magnet 51.

[0103] Of course, the circuit board 60 is not necessary. When the lens drive device does not have the circuit board 60, the OIS coil 52 is placed on the base 20, preferably on the inner side of the base 20. In a specific implementation, an opening can be provided on the side wall of the frame 30 to allow the OIS coil 52 to pass through the frame 30 and be positioned opposite the corresponding OIS magnet 51, so that there is no obstruction between the OIS coil 52 and the OIS magnet 51.

[0104] In one embodiment, Figures 6 to 8 A zoom-sensing magnet 57 is provided on one side of the carrier 40, and a zoom position sensor 58 is provided on the circuit board 60. The zoom position sensor 58 and the zoom-sensing magnet 57 are arranged opposite to each other. The zoom position sensor 58 and the zoom-sensing magnet 57 can be used to monitor the Z-axis movement position of the carrier 40.

[0105] Of course, when the lens drive device does not have a circuit board 60, the zoom position sensor 58 is set on the base 20, preferably on the inner side of the base 20.

[0106] In one embodiment, an OIS position sensor 59 is disposed inside the OIS coil 52, and the OIS position sensor 59 is disposed opposite to a corresponding OIS magnet 51. The position of the carrier 40 in the OIS direction (i.e., the X-axis direction and the Y-axis direction) is monitored by the cooperation of the OIS position sensor and the OIS magnet 51.

[0107] In one embodiment, reference is made to Figures 2 to 8The lens driving device also includes a bracket 70. The frame 30, bracket 70, and carrier 40 adopt a stacked frame structure, the specific structure of which is as follows:

[0108] The carrier 40 is mounted on the support 70. The top of the support 70 is provided with an X-axis support guide groove 71, and the bottom of the carrier 40 is provided with an X-axis carrier guide groove 41. The X-axis carrier guide groove 41 and the X-axis support guide groove 71 are arranged opposite each other, and a friction reduction device is provided between them.

[0109] The bracket 70 is mounted on the frame 30. The bottom of the bracket 70 is provided with a Y-axis bracket guide groove 72. The frame 30 is provided with a Y-axis frame guide groove 33. The Y-axis bracket guide groove 72 and the Y-axis frame guide groove 33 are arranged opposite each other vertically, and a friction reduction device is also provided between them.

[0110] With the combined action of OIS magnet 51 and OIS coil 52, carrier 40 can move in the X-axis and Y-axis directions. When carrier 40 moves in the X-axis direction, carrier 40 moves in the X-axis direction relative to support 70. When carrier 40 moves in the Y-axis direction, carrier 40 and support 70 move together in the Y-axis direction relative to frame 30.

[0111] Friction-reducing devices are used to reduce the kinematic friction between the carrier 40 and the support 70, and between the support 70 and the frame 30. The friction-reducing devices are preferably ball bearings or rollers.

[0112] In addition to the friction-reducing device of this embodiment, in another embodiment, one of the top end of the bracket 70 and the bottom end of the carrier 40 is provided with a first protrusion and the other is provided with a first groove, the first groove being disposed within the first protrusion. One of the bottom end of the bracket 70 and the frame 30 is provided with a second protrusion and the other is provided with a second groove, the second groove being disposed within the second protrusion. The protrusion and groove structure can be directly used in combination, which can also achieve a guiding effect.

[0113] The surfaces of the first protrusion, the first groove, the second protrusion, and the second groove are preferably coated with a lubricating coating to reduce friction during movement.

[0114] In one embodiment, both the carrier 40 and the support 70 are rectangular structures with a lens through-hole in the center. The base 20 and the frame 30 are both rectangular frame structures with a bottom surface and a lens through-hole in the center.

[0115] Example 2:

[0116] Reference Figures 9 to 15 This embodiment provides a lens driving device, which differs from Embodiment 1 in the following ways, while the rest of the structure is the same as that of Embodiment 1, and will not be described again here.

[0117] In terms of driving, the driving in the Z-axis direction in this embodiment is the same as in embodiment 1. That is to say, under the driving of the piezoelectric mechanism, the frame 30 drives the carrier 40 on it to move relative to the base 20 in the Z-axis direction, thereby achieving the zoom effect of the lens.

[0118] The OIS drive mechanism in this embodiment is designed with the following structure:

[0119] OIS magnets are divided into X-axis magnet 511 and Y-axis magnet 512, and OIS coils are divided into X-axis coil 521 and Y-axis coil 522.

[0120] The top of the frame 30 is provided with an X-axis coil 521 and a Y-axis coil 522, and the bottom of the carrier 40 is provided with an X-axis magnet 511, which is positioned opposite to the X-axis coil 521.

[0121] The lens driving device also includes a bracket 70. The frame 30, bracket 70, and carrier 40 adopt a stacked frame structure, that is, the carrier 40 is set on the bracket 70, and the bracket 70 is set on the frame 30. A Y-axis magnet 512 is provided at the bottom of the bracket 70, and the Y-axis magnet 512 is arranged opposite to the Y-axis coil 522.

[0122] Under the combined action of the X-axis magnet 511 and the X-axis coil 521, the carrier 40 moves relative to the support 70 in the X-axis direction. Under the combined action of the Y-axis magnet 512 and the Y-axis coil 522, the support 70 and the carrier 40 on it can move relative to the frame 30 in the Y-axis direction.

[0123] In one embodiment, the X-axis coil 521 and the Y-axis coil 522 are powered by frame-in-frame wiring within the frame 30.

[0124] Of course, the lens drive device can also be equipped with a circuit board, in which case the X-axis coil 521 and the Y-axis coil 522 are powered by the circuit board.

[0125] In one embodiment, since the support 70 is located between the frame 30 and the carrier 40, in order to ensure that the X-axis magnet 511 and the X-axis coil 521 at the bottom of the carrier are arranged opposite each other and there is no obstruction between them, the support 70 adopts a U-shaped structure, that is, one side of the support 70 is not provided, so as to avoid the X-axis magnet 511 and the X-axis coil 521 being opposite each other.

[0126] Of course, the bracket 70 can also adopt a rectangular frame structure or a rectangular structure with a lens through hole in the middle. In this case, a bracket clearance opening can be set at the bracket 70 between the X-axis magnet 511 and the X-axis coil 521 to achieve clearance.

[0127] In one embodiment, reference is made to Figures 11 to 15A support guide rod 73 is fixedly mounted on the side of the support 70 away from the Y-axis magnet 512, with the length direction of the support guide rod 73 along the X-axis. A carrier guide groove 43 is provided on the bottom end of the carrier 40 away from the X-axis magnet 511, and the carrier guide groove 43 is slidably connected to the support guide rod 73. Under the combined action of the X-axis magnet 511 and the X-axis coil 521, when the carrier 40 moves relative to the support 70 in the X-axis direction, the carrier guide groove 43 slides along the support guide rod 73. This results in the carrier 40 and the support 70 being connected through the aforementioned guide rod and guide groove structure.

[0128] Reference Figures 11 to 15 A frame guide rod 34 is fixedly mounted on the side of the frame 30 away from the X-axis coil 521 and the Y-axis coil 522, with the length direction of the frame guide rod 34 being the Y-axis direction. A bracket guide groove 74 is provided on the bottom end of the bracket 70 away from the Y-axis magnet 512 and the bracket guide rod 73, and the bracket guide groove 74 is slidably connected to the frame guide rod 34. Under the cooperative action of the Y-axis magnet 512 and the Y-axis coil 522, when the bracket 70 and the carrier 40 on it move relative to the frame 30 in the Y-axis direction, the bracket guide groove 74 slides along the frame guide rod 34. This results in the bracket 70 and the frame 30 being connected through the aforementioned guide rod and guide groove structure.

[0129] Example 3:

[0130] Reference Figures 16 to 19 This embodiment provides a lens driving device, which differs from Embodiment 1 in the following ways, while the rest of the structure is the same as that of Embodiment 1, and will not be described again here.

[0131] In terms of driving, the driving in the Z-axis direction in this embodiment is the same as in embodiment 1. That is to say, under the driving of the piezoelectric mechanism, the frame 30 drives the carrier 40 on it to move relative to the base 20 in the Z-axis direction, thereby achieving the zoom effect of the lens.

[0132] The OIS drive mechanism in this embodiment is designed with the following structure:

[0133] In this embodiment, no support frame is provided. Four hanging rings 81 are respectively installed at the four corners of the frame 30. The carrier 40 is fitted inside the frame 30, and the top of the carrier 40 is connected to the hanging rings 81 via upper springs 82, causing the carrier 40 to suspend within the frame 30. The four hanging rings 81 completely support the carrier 40 to reduce the frictional force of its movement.

[0134] OIS magnets 51 are provided on the outer walls of both sides of the carrier 40, and OIS coils 52 are provided on the inner walls of both sides of the frame 30. The OIS coils 52 are positioned opposite to the corresponding OIS magnets 51. Under the combined action of the OIS magnets 51 and the OIS coils 52, the carrier 40 moves relative to the frame 30 in the X-axis and Y-axis directions.

[0135] In specific implementation, there are two OIS magnets 51, which are preferably arranged on the outer walls of adjacent sides of the carrier 40. There are also two OIS coils 52, which are preferably arranged on the inner walls of adjacent sides of the frame 30.

[0136] In one embodiment, the OIS coil 52 is powered by frame-in-frame wiring within the frame 30.

[0137] Of course, the lens drive device can also be equipped with a circuit board, in which case the OIS coil 52 is powered by the circuit board.

[0138] In one embodiment, since the carrier 40 is suspended inside the frame 30, the frame 30 may not have a bottom surface, and the frame 30 is a rectangular frame structure.

[0139] Example 4:

[0140] Reference Figures 20 to 24 This embodiment provides a lens driving device, which differs from Embodiment 3 in the following ways, while the rest of the structure is the same as that of Embodiment 3, and will not be described again here.

[0141] The OIS drive mechanism in this embodiment is designed with the following structure:

[0142] In this embodiment, no hanging ring line 81 is provided, so the carrier 40 is not suspended inside the frame 30.

[0143] In this embodiment, a friction-reducing groove 83 is provided between the bottom end of the carrier 40 and the inner bottom end of the frame 30. A friction-reducing device is provided between the two vertically opposite friction-reducing grooves 83 to reduce the moving friction of the carrier 40. The friction-reducing device is preferably a ball bearing or a roller. Figure 23 As shown, the friction reduction device is a ball bearing 84.

[0144] A reset upper spring 85 is connected between the top of the carrier 40 and the top of the frame 30. After the carrier 40 moves, the reset upper spring 85 can achieve the reset effect and press the carrier 40 onto the friction reduction device to prevent the friction reduction device from detaching.

[0145] The bottom of the carrier 40 is provided with an OIS magnet 51, and the top of the frame 30 is provided with an OIS coil 52. The OIS coil 52 is positioned opposite to the corresponding OIS magnet 51.

[0146] In specific implementation, four OIS magnets 51 are arranged around the bottom of the carrier 40. The carrier 40 is preferably a rectangular structure with a lens through-hole in the center. Four OIS coils 52 are arranged on the four sides of the frame 30. The frame 30 is preferably a rectangular frame structure with a bottom surface and a lens through-hole in the center.

[0147] Example 5:

[0148] Reference Figures 25 to 30 This embodiment provides a lens driving device, which differs from Embodiment 1 in the following ways, while the rest of the structure is the same as that of Embodiment 1, and will not be described again here.

[0149] This embodiment employs a different structure from Embodiment 1 for the drive between the base 20 and the frame 30 in the Z-axis direction:

[0150] The lens driving device also includes two opposing inclined support members 91, the opposing surfaces of which are wedge-shaped inclined surfaces 91a, with the inclination direction of the wedge-shaped inclined surfaces 91a from the outer upper side to the inner lower side. Inclined bracing blocks 92 are respectively provided on both sides of the bottom end of the frame 30, and each inclined bracing block 92 has a support block inclined surface 92a. The frame 30 is placed on the upper end of the two inclined support members 91, with the support block inclined surface 92a in contact with the wedge-shaped inclined surface 91a. That is, the two inclined bracing blocks 92 are located between the two inclined support members 91, causing the frame 30 to be supported and lifted by the two inclined support members 91.

[0151] Piezoelectric mechanisms are installed at diagonal positions on the base 20. Each piezoelectric mechanism abuts against a corresponding inclined support member 91. The piezoelectric mechanism drives the inclined support member 91 to move horizontally, for example, in the X-axis or Y-axis direction. When the two inclined support members 91 move closer to each other under the drive of the two piezoelectric mechanisms, the frame 30 is lifted by the two inclined support members 91 and moves upward. When the two inclined support members 91 move further apart, the frame 30 is lowered by the two inclined support members 91 and moves downward, thus enabling the frame 30 to move in the Z-axis direction.

[0152] In one embodiment, reference is made to Figure 27 and Figure 28 The piezoelectric mechanism includes a second piezoelectric block 93 and a second friction rod 94. The second piezoelectric block 93 is mounted on the base 20, and the second friction rod 94 is connected to the second piezoelectric block 93. The second friction rod 94 abuts against one side of the inclined support member 91. When the second piezoelectric block 93 is energized, it will deform and return to its original shape after the power is cut off. When the second piezoelectric block 93 is energized and deformed, the second friction rod 94 will stretch, thereby driving the inclined support member 91 to move horizontally, for example, in the X-axis or Y-axis direction.

[0153] In one embodiment, reference is made to Figure 27 and Figure 28 The piezoelectric mechanism also includes an elastic clamping plate 95, the inner sidewall of which is detachably connected to one side of the inclined support member 91, for example, by a snap-fit ​​connection. The outer inner wall of the elastic clamping plate 95 abuts against the outer side of the second friction rod 94, preferably against the outer side of the middle portion of the second friction rod 94. Under the elastic action of the elastic clamping plate 95, the second friction rod 94 abuts against the inclined support member 91, so that after the second piezoelectric block 93 is energized, the second friction rod 94 drives the inclined support member 91 to move horizontally, for example, in the X-axis or Y-axis direction.

[0154] In a preferred embodiment, the inclined support member 91 has a V-shaped groove opening outward on one side wall. The inner side of the second friction rod 94 fits into the V-shaped groove, while its outer side fits into the inner outer wall of the elastic clamping plate 95. A clamping plate mounting hole is provided above the V-shaped groove, and the inner side wall of the elastic clamping plate 95 is detachably connected to the clamping plate mounting hole. More preferably, the piezoelectric mechanism also includes a spring piece, which is disposed in the V-shaped groove. The spring piece is preferably a V-shaped spring piece, so that its inner side fits into the V-shaped groove and its outer side fits into the inner side of the second friction rod 94. That is, the second friction rod 94 is located between the inner outer wall of the elastic clamping plate 95 and the spring piece. The combined effect of the spring piece and the elastic clamping plate 95 increases the tight abutment connection between the second friction rod 94 and the inclined support member 91.

[0155] In one embodiment, the elastic clamp 95 is a quasi-inverted V-shaped clamp or a quasi-inverted U-shaped clamp.

[0156] In one embodiment, reference is made to Figure 27 and Figure 28 The base 20 has two pairs of base guide rods 21 fixedly installed on its sides. The length direction of the base guide rods 21 is horizontal, such as the X-axis or Y-axis, and it is consistent with the movement direction of the inclined support 91.

[0157] The bottom end of the inclined support member 91, away from the piezoelectric mechanism, is provided with a support member guide groove 911. The two support member guide grooves 911 are slidably connected to a corresponding base guide rod 21. When one side of the inclined support member 91 moves horizontally, such as in the X-axis or Y-axis direction, driven by the piezoelectric mechanism, the other side of the inclined support member 91 moves along the corresponding base guide rod 21 through the support member guide groove 911.

[0158] In this embodiment, the guide rod guide groove structure is provided between the base 20 and the inclined support member 91 to allow the two inclined support members 91 to move stably along the base guide rod 21.

[0159] In one embodiment, reference is made to Figures 25 to 28The lens driving device also includes a housing 10, which is detachably connected to the outside of the base 20 and has a hollow cavity between it and the base 20. The frame 30, carrier 40, OIS magnet 51, OIS coil 52, two inclined support members 91 and piezoelectric mechanism are all arranged in the hollow cavity. The housing 10 is a metal housing made of metal material.

[0160] Reference Figure 27 and Figure 28 An adsorption magnet 96 is provided on one side of the inclined support member 91. A base clearance hole 22 is provided on the base 20 outside the adsorption magnet 96. The adsorption magnet 96 is attracted to the outer shell 10 by the clearance hole 22.

[0161] In practical implementation, an installation groove is provided on one side of the inclined support 91, and an adsorption magnet 96 is installed in the installation groove. There is no obstruction between the adsorption magnet 96 and the outer shell 10, so that an adsorption force is generated between the two, allowing the inclined support 91 to abut against the base guide rod 21 to ensure the guiding effect of the base guide rod 21.

[0162] The outer casing 10 is preferably made of iron.

[0163] In one embodiment, reference is made to Figure 27 , Figure 28 and Figure 30 Both the wedge-shaped inclined surface 91a and the support block inclined surface 92a are provided with inclined guide grooves 97, and a friction-reducing device is provided between the two inclined guide grooves 97 arranged vertically opposite each other. The friction-reducing device guides the frame 30 while reducing the moving friction force. The friction-reducing device is preferably a ball bearing or a roller.

[0164] In addition to the friction-reducing device of this embodiment, in another embodiment, one of the wedge-shaped inclined surface 91a and the support block inclined surface 92a is provided with an inclined protrusion and the other is provided with an inclined groove, with the inclined groove disposed within the inclined protrusion. The protrusion and groove structure can be directly used in conjunction, which can also achieve a guiding effect.

[0165] Both the beveled protrusions and the beveled grooves are preferably coated with a lubricating coating.

[0166] The structure described above, which uses the inclined support 91 and the inclined brace 92 to achieve Z-axis drive, can also be applied to embodiments 2 to 4 above. That is, the piezoelectric mechanism drive between the base 20 and the frame 30 in embodiments 2 to 4 above is switched to the Z-axis drive structure in this embodiment. The drive structure in the OIS direction can remain unchanged, and it can also achieve the three-axis movement effect of the carrier 40.

[0167] The preferred embodiments of this utility model have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A lens driving device, the lens driving device comprising a base, a frame, and a carrier, characterized in that, The carrier moves relative to the frame in a first direction and a second direction within the frame through the cooperation of OIS magnets and OIS coils, and the frame moves relative to the base in a third direction on the base through a piezoelectric mechanism. The first direction, the second direction, and the third direction are all perpendicular to each other.

2. The lens driving device as described in claim 1, characterized in that, The piezoelectric mechanism includes a piezoelectric block and a friction rod. The piezoelectric block is disposed on the base, and the friction rod is connected to the piezoelectric block. The friction rod abuts against one side of the frame. When the piezoelectric block is energized and deformed, the friction rod drives the frame and the carrier on it to move in a third direction.

3. The lens driving device as described in claim 2, characterized in that, A friction rod guide groove is provided on the outer wall of the frame, and spring contact points are provided on the outer walls of the frame on both sides of the friction rod guide groove; the piezoelectric mechanism also includes a spring, the two ends of which are respectively connected to the spring contact points on both sides of the friction rod guide groove, the friction rod is located between the spring and the friction rod guide groove, and the inner wall of the friction rod abuts against the friction rod guide groove; when the piezoelectric block is energized and deformed, the friction rod drives the spring and the frame to move in a third direction.

4. The lens driving device as described in claim 2, characterized in that, The piezoelectric mechanism also includes a counterweight plate, and the piezoelectric block is mounted on the counterweight plate. Both the counterweight plate and the piezoelectric block are mounted on the piezoelectric mechanism mounting port provided on the base.

5. The lens driving device as described in claim 1, characterized in that, The lens driving device also includes two oppositely arranged inclined support members, the opposite surfaces of the two inclined support members are wedge-shaped inclined surfaces, and inclined support blocks are respectively provided on both sides of the bottom end of the frame. The inclined support blocks are provided with support block inclined surfaces. The frame is placed on the upper end of the two inclined support members, and the support block inclined surfaces are in contact with the wedge-shaped inclined surfaces. The piezoelectric mechanism is provided at a diagonal position on the base. The two piezoelectric mechanisms abut against a corresponding inclined support member. The piezoelectric mechanism drives the inclined support member to move in a first direction or a second direction. When the two inclined support members move relatively closer or relatively farther away under the drive of the two piezoelectric mechanisms, the frame moves in a third direction.

6. The lens driving device as described in claim 5, characterized in that, The piezoelectric mechanism includes a piezoelectric block and a friction rod. The piezoelectric block is disposed on the base, and the friction rod is connected to the piezoelectric block. The friction rod abuts against one side of the inclined support member. When the piezoelectric block is energized and deformed, the friction rod drives the inclined support member to move in a first direction or a second direction.

7. The lens driving device as described in claim 6, characterized in that, The piezoelectric mechanism also includes an elastic clamping plate. The inner side wall of the elastic clamping plate is detachably connected to one side of the inclined support member. The outer inner wall of the elastic clamping plate abuts against the outer side of the friction rod. The friction rod and the inclined support member are abutted by the elastic clamping plate, so that after the piezoelectric block is energized, the friction rod drives the inclined support member to move in a first direction or a second direction.

8. The lens driving device as described in claim 5, characterized in that, Two base guide rods are fixedly installed on two opposite sides of the base, and the length direction of the base guide rods is either a first direction or a second direction. A support guide groove is provided on the side of the bottom of the inclined support member away from the piezoelectric mechanism. The two support guide grooves are slidably connected to one of the corresponding base guide rods. When one side of the inclined support member moves in the first direction or the second direction driven by the piezoelectric mechanism, the other side of the inclined support member moves along the corresponding base guide rod through the support guide groove.

9. The lens driving device as described in claim 8, characterized in that, The lens driving device also includes a housing, which is detachably connected to the outside of the base and has a hollow cavity between it and the base. The frame, the carrier, the OIS magnet, the OIS coil, the two inclined support members, and the piezoelectric mechanism are all disposed in the hollow cavity. The housing is a metal housing made of metal material. An adsorption magnet is provided on one side of the inclined support member, and a base clearance hole is provided on the base outside the adsorption magnet. The adsorption magnet is attracted to the metal housing through the base clearance hole.

10. The lens driving device as claimed in claim 5, characterized in that, Inclined guide grooves are provided on both the inclined surface of the support block and the inclined surface of the wedge, and a friction-reducing device is provided between the two inclined guide grooves that are arranged opposite each other. Alternatively, one of the inclined surfaces of the support block and the wedge-shaped inclined surface is provided with an inclined protrusion and the other is provided with an inclined groove, the inclined groove being disposed within the inclined protrusion.

11. The lens driving device as claimed in claim 10, characterized in that, The friction reduction device is a ball bearing or a roller.

12. The lens driving device as claimed in claim 10, characterized in that, Both the inclined protrusions and the inclined grooves are coated with a lubricating plating.

13. The lens driving device according to any one of claims 2 to 4, 6 to 7, characterized in that, The base is provided with a built-in circuit, which is connected to the piezoelectric block and supplies power to the piezoelectric block through the built-in circuit. Alternatively, the lens driving device may also include a circuit board surrounding the outside of the base, which supplies power to the piezoelectric block via built-in circuitry within the base.

14. The lens driving device as claimed in claim 13, characterized in that, The circuit board is an FPC board.

15. The lens driving device according to any one of claims 1 to 12, characterized in that, OIS magnets are provided on the outer walls of both sides of the carrier, and OIS coils are provided on the base or on the circuit board surrounding the outside of the base. The OIS coils pass through the frame and are positioned opposite to the corresponding OIS magnets.

16. The lens driving device as claimed in claim 15, characterized in that, A zoom-sensing magnet is provided on one side of the carrier, and a zoom position sensor is provided on the base or the circuit board, with the zoom position sensor being positioned opposite to the zoom-sensing magnet.

17. The lens driving device as claimed in claim 15, characterized in that, An OIS position sensor is installed inside the OIS coil, and the OIS position sensor is positioned opposite to a corresponding OIS magnet.

18. The lens driving device as claimed in claim 15, characterized in that, The lens driving device also includes a bracket, the carrier is disposed on the bracket, the top end of the bracket and the bottom end of the carrier are both provided with a first direction guide groove, a friction reducing device is disposed between the two first direction guide grooves arranged vertically opposite each other, the bracket is disposed on the frame, the bottom of the bracket and the inside of the frame are both provided with a second direction guide groove, another friction reducing device is disposed between the two second direction guide grooves arranged vertically opposite each other.

19. The lens driving device as claimed in claim 18, characterized in that, The friction reduction device is a ball bearing or a roller.

20. The lens driving device as claimed in claim 18, characterized in that, One of the top end of the bracket and the bottom end of the carrier is provided with a first protrusion and the other is provided with a first groove, the first groove being disposed within the first protrusion; one of the bottom end of the bracket and the frame is provided with a second protrusion and the other is provided with a second groove, the second groove being disposed within the second protrusion.

21. The lens driving device as claimed in claim 20, characterized in that, The surfaces of the first protrusion, the first groove, the second protrusion, and the second groove are all coated with a lubricating plating layer.

22. The lens driving device according to any one of claims 1 to 12, characterized in that, The OIS magnet is divided into a first-direction magnet and a second-direction magnet, and the OIS coil is divided into a first-direction coil and a second-direction coil. The top of the frame is respectively provided with the first directional coil and the second directional coil, and the bottom of the carrier is provided with the first directional magnet, which is positioned opposite to the first directional coil. The lens driving device also includes a bracket, the carrier is disposed on the bracket, the bracket is disposed on the frame, and a second directional magnet is disposed at the bottom end of the bracket, the second directional magnet being disposed opposite to the second directional coil.

23. The lens driving device as claimed in claim 22, characterized in that, The first directional coil and the second directional coil are powered by the frame-in-frame wiring or by the circuit board.

24. The lens driving device as claimed in claim 22, characterized in that, A support guide rod is fixedly installed on the side of the support away from the second direction magnet. The length direction of the support guide rod is the first direction. A carrier guide groove is provided on the bottom end of the carrier away from the first direction magnet. The carrier guide groove is slidably connected to the support guide rod. When the carrier moves relative to the support in the first direction under the cooperation of the first direction coil and the first direction magnet, the carrier guide groove slides along the support guide rod. A frame guide rod is fixedly installed on the side of the frame away from the first direction coil and the second direction coil. The length direction of the frame guide rod is the second direction. A bracket guide groove is provided on the bottom end of the bracket away from the second direction magnet and the bracket guide rod. The bracket guide groove is slidably connected to the frame guide rod. When the bracket and the carrier on it move in the second direction relative to the frame under the cooperation of the second direction coil and the second direction magnet, the bracket guide groove slides along the frame guide rod.

25. The lens driving device according to any one of claims 1 to 12, characterized in that, The frame is provided with hanging rings at its four corners. The carrier is fitted inside the frame. The top of the carrier is connected to the hanging rings by an upper spring, so that the carrier is suspended inside the frame. The OIS magnets are provided on the outer walls of both sides of the carrier, and the OIS coils are provided on the inner walls of both sides of the frame. The OIS coils are arranged opposite to the corresponding OIS magnets.

26. The lens driving device as claimed in claim 25, characterized in that, The OIS coil is powered by either the frame's built-in wiring or by a circuit board.

27. The lens driving device according to any one of claims 1 to 12, characterized in that, A friction-reducing groove is provided between the bottom end of the carrier and the bottom end of the inner frame. A friction-reducing device is provided between the two friction-reducing grooves arranged opposite each other. An upper spring is connected between the top end of the carrier and the top end of the frame. The OIS magnet is provided at the bottom of the carrier, and the OIS coil is provided at the top of the frame. The OIS coil is arranged opposite to the corresponding OIS magnet.

28. The lens driving device as claimed in claim 27, characterized in that, The friction reduction device is a ball bearing or a roller.

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