Lens driving device

Abstract

The utility model belongs to optical image equipment technical field, concretely relates to a lens drive arrangement, including base, frame and carrier, frame is located on the base and is set up into can move along first direction, second direction relative to the base, carrier is located in the frame and is set up into can move along third direction relative to the frame, two opposite corner positions on the base are provided with a ball groove respectively, the ball groove is placed with OIS ball respectively, and the upper end of OIS ball is in contact with the bottom end of the corner position of frame, another corner position on the base and the bottom end between another corner position of frame are provided with friction reduction mechanism, and the friction reduction mechanism forms the triangular support structure with two OIS balls, the utility model saves the cost and makes the frame more stable when carrying out OIS action.

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] In recent years, with the development of technology, many electronic devices now have the function of taking pictures or recording videos. The use of these electronic devices is becoming more and more common, and they are developing towards a more convenient and thinner design to provide users with more choices.

[0003] In practice, in order to adapt to various shooting scenarios, the lens needs to be constantly focused and stabilized. In existing technologies, a lens drive device is generally used to drive the lens to move along the optical axis to adjust the focal length, and to drive the lens to move in a direction perpendicular to the optical axis to prevent lens shake.

[0004] Existing lens drive mechanisms typically employ a carrier and a lens attached to the carrier to move along three axes relative to a base to achieve autofocus and image stabilization. During OIS (Optical Image Stabilization) operation, the frame usually moves the carrier relative to the base along the X and Y axes. However, the high friction between the frame and the base often makes movement difficult or unstable, severely impacting the lens's stabilization effectiveness. Utility Model Content

[0005] The present invention addresses the aforementioned technical problems by providing a lens driving device.

[0006] A lens driving device includes a base, a frame, and a carrier. The frame is located on the base and is configured to move relative to the base in a first direction and a second direction. The carrier is located within the frame and is configured to move relative to the frame in a third direction.

[0007] The base has a ball groove at each of the two opposite corners, and an OIS ball is placed in each of the ball grooves. The upper end of the OIS ball is in contact with the bottom end of the corner of the frame.

[0008] A friction-reducing mechanism is provided between another corner of the base and the bottom of another corner of the frame, and the friction-reducing mechanism and the two OIS balls form a triangular support structure.

[0009] Optionally, the friction-reducing guide structure is one of a ball bearing, a hemispherical structure, or a guide cylinder structure.

[0010] Optionally, the friction reduction mechanism includes a support plate, a plurality of friction reduction guide structures, a first direction guide groove, and a second direction guide groove. The support plate is located between the base and the frame. The plurality of friction reduction guide structures are disposed on the support plate. One of the first direction guide groove and the second direction guide groove is disposed at a corner position of the base, and the other is disposed at the bottom end of a corner position of the frame. At least one end of the friction reduction guide structure is located in the first direction guide groove, and at least one other end of the friction reduction guide structure is located in the second direction guide groove.

[0011] Optionally, the friction-reducing guide structure is fixedly connected to the support plate or integrally formed.

[0012] Optionally, the support plate is provided with four guide structure receiving slots, which are arranged in a cross shape. The friction-reducing guide structures provided on the two diagonally opposite guide structure receiving slots serve as first-direction guide structures, with one end of the first-direction guide structure located in the first-direction guide slot. The friction-reducing guide structures provided on the other two diagonally opposite guide structure receiving slots serve as second-direction guide structures, with one end of the second-direction guide structure located in the second-direction guide slot.

[0013] Optionally, the friction reduction mechanism includes a support plate, a plurality of friction reduction guide structures, a first directional guide groove and a second directional guide groove. The support plate is located between the base and the frame. The first directional guide groove and the second directional guide groove are disposed on the support plate. At least one of the friction reduction guide structures is disposed at a corner position of the base and one end is located within one of the first directional guide groove and the second directional guide groove. At least another friction reduction guide structure is disposed at the bottom corner position of the frame and one end is located within the other of the first directional guide groove and the second directional guide groove.

[0014] Optionally, the friction-reducing guide structure is fixedly connected to the base or the frame or integrally formed.

[0015] Optionally, a plurality of OIS magnets are installed on the inner side of the frame, and a main circuit board is provided on the base. The main circuit board is located between the base and the frame. A plurality of OIS coils are provided on the main circuit board. Each OIS coil is arranged opposite to a corresponding OIS magnet. After the OIS coil is energized, the frame can move relative to the base in a first direction or a second direction.

[0016] Optionally, two OIS position sensors are provided at the bottom of the main circuit board, and the OIS position sensors are arranged opposite to one of the OIS magnets.

[0017] Optionally, a sensor clearance groove is provided at the top of the base, and the OIS position sensor is located in the sensor clearance groove.

[0018] Optionally, a plurality of OIS magnets are installed inside the frame, and a plurality of magnetic plates are provided inside the base, with each magnetic plate being opposite to and attracting a corresponding OIS magnet.

[0019] Optionally, the frame contains a built-in metal element, which is positioned opposite to and attracted to the OIS magnet.

[0020] Optionally, a main circuit board is provided on the base, the main circuit board is located between the base and the frame, and a plurality of OIS coils are provided on the main circuit board. Each OIS coil is opposite to a corresponding OIS magnet, and after the OIS coil is energized, the frame can move relative to the base in a first direction or a second direction; the magnetic suction plate is a hollow magnetic suction plate with a hollow structure.

[0021] Optionally, the carrier is provided with anti-collision rubber blocks at the top and bottom ends in a third direction.

[0022] Optionally, AF guide grooves are respectively provided on the outer side wall of the carrier and the inner side wall of the frame, and an AF guide shaft is provided between the two AF guide grooves arranged opposite to each other, and the AF guide grooves are abutting and connected to each other.

[0023] Optionally, an AF magnet is provided on the outer side of the carrier, an AF circuit board is provided on the side wall of the frame, an AF coil is installed on the inner side of the AF circuit board, the AF coil is arranged opposite to the AF magnet, and after the AF coil is energized, the carrier can move relative to the frame in a third direction.

[0024] Optionally, an AF position sensor is provided on the AF circuit board, and the AF position sensor is arranged opposite to the AF magnet.

[0025] Optionally, AF guide grooves are respectively provided on the outer side wall of the carrier and the inner side wall of the frame, and an AF guide shaft is provided between the two AF guide grooves arranged opposite to each other. The AF guide grooves are in contact with each other. The AF guide grooves on the carrier are located on both sides of the AF magnet, and the AF guide grooves on the frame are located on both sides of the AF coil.

[0026] Optionally, an adsorption metal sheet is provided on the outside of the AF circuit board, and the adsorption metal sheet is arranged opposite to the AF magnet and adsorbs each other.

[0027] Optionally, the frame is provided with a frame-integrated circuit, and a metal boss extends from the frame-integrated circuit, the metal boss being located at the bottom of the AF guide shaft.

[0028] Optionally, the lens driving device further includes a plurality of upper springs, which are respectively connected between the top end of the frame and the top end of the carrier, and one of the upper springs is connected to the AF circuit board;

[0029] The base is provided with support protrusions, and the top of each support protrusion is connected to one or more corresponding upper spring plates. The current provided by the base built-in circuit in the base is transmitted sequentially through an independent upper spring plate, the frame built-in circuit in the frame, to the AF circuit board and the AF coil through one of the support protrusions.

[0030] Optionally, there are four support protrusions, three of which are located at the three corners of the base, the ball grooves and the OIS balls at the two opposite corners are located inside the corresponding support protrusions, and one of the support protrusions is located on the side of the friction reduction mechanism.

[0031] Optionally, a main circuit board is provided on the base, the main circuit board is located between the base and the frame, and the main circuit board is connected to the base's built-in circuitry located in the support protrusion through the internal circuitry of the circuit board.

[0032] Optionally, the main circuit board is an FPC board.

[0033] Optionally, the main circuit board has an L-shaped structure.

[0034] Optionally, one side of the main circuit board is provided with a connection terminal for connecting to external circuits.

[0035] Optionally, the lens driving device further includes a housing, which is detachably connected to the base and forms a hollow cavity, and the frame, the carrier, the OIS ball bearings and the friction reduction mechanism are all disposed in the hollow cavity.

[0036] Beneficial effects: This utility model has at least one or more of the following advantages:

[0037] 1. This utility model features a triangular support structure formed by friction-reducing mechanisms and two OIS (Optical Interchange of Inertia) balls between three corners of the base and three corners of the bottom of the frame. Compared to existing technologies that use ball bearing structures at all four corners of the base, this design saves costs and makes the frame more stable during OIS operation. This is because in the ball bearing support structures at the four corners, different combinations of triangular balls alternately support the frame during movement, leading to some instability. This utility model eliminates the ball bearing support structure of existing technologies and uses a triangular support structure to effectively avoid this instability.

[0038] 2. The friction reduction mechanism of this utility model can be set on the support plate, the top corner of the base, or the bottom corner of the frame. The friction reduction mechanism cooperates with the first direction guide groove and the second direction guide groove to achieve the technical effects of reducing friction and guiding.

[0039] 3. This utility model, through the design of the magnetic suction plate, can generate an attractive force with the OIS magnet, allowing the frame to stably abut against the ball bearings at the two support points and the friction reduction mechanism in a triangular contact. Furthermore, the magnetic suction plate adopts a hollow structure, which can avoid the OIS coil, increase its relative area with the OIS magnet, and thus increase the magnetic attraction force.

[0040] 4. This utility model achieves a driving method of a moving magnetic structure by setting an AF magnet on the outside of the carrier and setting an AF coil on the AF circuit board on the side wall of the frame. Compared with the driving method of the moving coil in the prior art, it is not necessary to energize the carrier side when driving the carrier to move in the AF direction, which reduces the wiring design.

[0041] 5. In the design of the frame side for power supply, the current provided by the base's built-in circuitry is transmitted to the AF circuit board and AF coil through the support protrusion, upper spring, and frame built-in circuitry. Since a friction-reducing mechanism is set at one corner of the base, a support protrusion is not provided at that corner. Instead, the support protrusion is moved from the corner to the side of the friction-reducing mechanism, thus achieving appropriate avoidance of the friction-reducing mechanism.

[0042] 6. This utility model achieves Z-axis direction motion guidance for the carrier through the AF guide shaft. Furthermore, by generating an adsorption force between the adsorption metal sheet and the AF magnet, the carrier and the AF guide shaft are kept in contact, preventing the AF guide shaft from detaching from the AF guide groove.

[0043] 7. This utility model has anti-collision rubber blocks at the top and bottom of the carrier to prevent collisions during AF movement. Attached Figure Description

[0044] Figure 1 This is an exploded view of the structure of this utility model;

[0045] Figure 2 for Figure 1 Further exploded view;

[0046] Figure 3 This is an exploded view showing the positional relationship between the frame, support plate, and carrier of this utility model.

[0047] Figure 4 This is a structural diagram showing the positional relationship between the frame and the support plate of this utility model;

[0048] Figure 5 for Figure 4 Exploded view;

[0049] Figure 6 This is an exploded view showing the positional relationship between the frame and the carrier of this utility model.

[0050] Figure 7 This is a schematic diagram of part of the internal structure of the frame of this utility model;

[0051] Figure 8 This is an exploded view showing the positional relationship between the base and the main circuit board of this utility model.

[0052] Figure 9 This is a partial internal structure diagram of the base of this utility model. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] In the following description, the first direction is defined as the X-axis, the second direction as the Y-axis, and the third direction as the Z-axis, which is the optical axis. The optical axis represents the direction of light propagation within an optical element; it is an abstract concept and does not refer to a physical axis.

[0058] Reference Figures 1 to 9 This utility model provides a lens driving device, which mainly includes a housing 10, a base 20, a frame 30, a carrier 40, an OIS ball bearing 51, and a friction reduction mechanism.

[0059] The outer shell 10 is an optional structure. The outer shell 10 and the base 20 are detachably connected and form a hollow cavity. The frame 30, the carrier 40, the OIS ball bearing 51, and the friction reduction mechanism are all disposed within the hollow cavity. The outer shell 10 and the base 20 are preferably connected by a snap-fit ​​connection to form the hollow cavity.

[0060] The frame 30 is located on the base 20 and is configured to move relative to the base 20 along the X-axis and Y-axis directions. The X-axis and Y-axis directions are perpendicular to each other. In a specific implementation, in one example, refer to... Figures 2 to 5 , Figure 8 Several OIS magnets 31 are installed inside the frame 30. A main circuit board 60 is set on the base 20. The main circuit board 60 is located between the base 20 and the frame 30. Several OIS coils 61 are set on the main circuit board 60. Each OIS coil 61 is positioned opposite to a corresponding OIS magnet 31. After the OIS coil 61 is energized, the frame 30 and the carrier 40 set on it can move relative to the base 20 in the X-axis and Y-axis directions within the hollow cavity to achieve the purpose of anti-shake.

[0061] Since the OIS coil 61 is built into the circuit board 60, a connection terminal 60a for connecting to external circuits can be provided on one side of the main circuit board 60. The power supply purpose is achieved by connecting the OIS coil 61 through the internal circuit of the main circuit board 60.

[0062] The carrier 40 is located within the frame 30 and is configured to move relative to the frame 30 along the Z-axis. The Z-axis is perpendicular to both the X-axis and Y-axis. In one specific implementation example, refer to... Figures 3 to 7An AF magnet 41 is provided on the outer side of the carrier 40, an AF circuit board 32 is provided on the side wall of the frame 30, and an AF coil 33 is installed on the inner side of the AF circuit board 32. The AF coil 33 is arranged opposite to the AF magnet 41, and after the AF coil 33 is energized, the carrier 40 can move relative to the frame 30 along the Z-axis to achieve zoom.

[0063] This invention achieves a driving method for a moving magnetic structure by setting an AF magnet 41 on the outside of the carrier 40 and setting an AF coil 33 on the AF circuit board 32 on the side wall of the frame 30. Compared with the driving method of the moving coil in the prior art, it is not necessary to energize the carrier 40 side when driving the carrier 40 to move in the AF direction, thus reducing the wiring design.

[0064] The lens is installed inside the carrier 40. When the carrier 40 moves, it can drive the lens to move along its optical axis, that is, the Z-axis. When the frame 30 moves, it can drive the carrier 40 and the lens on it to move along the X-axis and Y-axis, thus realizing the three-axis movement operation of the lens.

[0065] Reference Figures 2 to 5 , Figure 8 At two opposite corners of the base 20, there is a ball groove, and an OIS ball 51 is placed in each groove. The upper end of the OIS ball 51 contacts the bottom end of the corner of the frame 30. A friction-reducing mechanism is provided between the bottom end of the other corner of the base 20 and the other corner of the frame 30. The friction-reducing mechanism and the two OIS balls 51 form a triangular support structure.

[0066] This invention features a triangular support structure formed by a friction-reducing mechanism and two OIS balls 51 between three corners of the base 20 and three corners of the bottom of the frame 30. Compared to the prior art where ball bearing structures are installed at all four corners of the base 20, this design saves costs and makes the frame 30 more stable during OIS operation. This is because in the ball bearing support structures at the four corners, different combinations of triangular balls alternately support the frame 30 during movement, resulting in some instability. This invention abandons the ball bearing support structure of the prior art and uses a triangular support structure to effectively avoid instability.

[0067] In one embodiment, the friction-reducing mechanism includes a support plate 52, a plurality of friction-reducing guide structures 53, a first-direction guide groove 54, and a second-direction guide groove 55. The first-direction guide groove 54 is also an X-axis guide groove, with its length direction along the X-axis; the second-direction guide groove 55 is also a Y-axis guide groove, with its length direction along the Y-axis. The support plate 52 is located between the base 20 and the frame 30.

[0068] Reference Figures 2 to 5 , Figure 8 Several friction-reducing guide structures 53 employ ball bearings, with at least one ball bearing positioned at the top of the support plate 52 as an X-axis ball bearing and at least another ball bearing positioned at the bottom of the support plate 52 as a Y-axis ball bearing. A first direction guide groove 54 is positioned at the bottom of the corner of the frame 30 as an X-axis guide groove, and a second direction guide groove 55 is positioned at the corner of the base 20 as a Y-axis guide groove. The top of the X-axis ball bearing is located within the X-axis guide groove, and the Y-axis ball bearing is located within the Y-axis guide groove. When the frame 30 performs X-axis movement, the frame 30 moves relative to the support plate 52 in the X-axis direction, reducing friction with the X-axis ball bearing. When the frame 30 performs Y-axis movement, both the frame 30 and the support plate 52 move in the Y-axis direction, reducing friction with the Y-axis ball bearing.

[0069] In this embodiment, the ball bearings are preferably fixedly connected to the support plate 52 or integrally formed.

[0070] In this embodiment, the support plate 52 preferably has four guide structure receiving grooves 521 arranged in a cross shape. The friction-reducing guide structures 53 provided at the top of two diagonal guide structure receiving grooves 521 are two X-axis ball bearings, the tops of which are located in the X-axis guide groove at the bottom of the frame 30. The friction-reducing guide structures 53 provided at the bottom of the other two diagonal guide structure receiving grooves 521 are two Y-axis ball bearings, which are located in the Y-axis guide groove. Since the friction-reducing guide structures 53 in this embodiment are ball bearings, the guide structure receiving grooves 521 can be designed with ball bearing holes.

[0071] In another embodiment, the positions of the X-axis guide groove and the Y-axis guide groove can be interchanged. That is, the X-axis guide groove is located at the corner of the base 20, and the Y-axis guide groove is located at the bottom of the corner of the frame 30. In this case, the X-axis ball bearing is located at the bottom of the support plate 52, and the Y-axis ball bearing is located at the top of the support plate 52. When the frame 30 performs X-axis movement, both the frame 30 and the support plate 52 move in the X-axis direction, and the X-axis ball bearing reduces friction. When the frame 30 performs Y-axis movement, the frame 30 moves relative to the support plate 52 in the Y-axis direction, and the Y-axis ball bearing reduces friction.

[0072] In another embodiment, the positions of the ball bearings and the X-axis guide groove and Y-axis guide groove can be interchanged. That is, the first direction guide groove 54, which is the X-axis guide groove, is set at the top of the support plate 52, and the second direction guide groove 55, which is the Y-axis guide groove, is set at the bottom of the support plate 52. The X-axis ball bearings in the friction-reducing guide structure 53 are set at the bottom of the corner of the frame 30, and the bottom of the X-axis ball bearings is located in the X-axis guide groove. The Y-axis ball bearings in the friction-reducing guide structure 53 are set at the corner of the base, and the top of the Y-axis ball bearings is located in the Y-axis guide groove. The above structure can also achieve the technical effects of reducing friction and guiding.

[0073] In this embodiment, the X-axis ball bearing is fixedly connected to the frame 30 or integrally formed, and the Y-axis ball bearing is fixedly connected to the base 20 or integrally formed.

[0074] In another embodiment, the ball bearing can be replaced with a friction-reducing guide structure 53, either a hemispherical structure or a guide cylinder structure. The OIS (Optical Inertia Switch) action of the frame 30 relative to the base 20 is achieved through the cooperation of the hemispherical structure or guide cylinder structure with the X-axis guide groove and the Y-axis guide groove. Of course, in this embodiment, the positional relationship between the friction-reducing guide structure 53 and the guide groove can be interchanged, while still achieving the same friction-reducing and guiding effect.

[0075] In one embodiment, when a main circuit board 60 is provided on the base 20, two OIS position sensors are provided at the bottom of the main circuit board 60, and the OIS position sensors are positioned opposite to an OIS magnet 31 above them. The position monitoring of the frame 30 and the carrier 40 during OIS movement is achieved by the cooperation of the OIS position sensors and the OIS magnet.

[0076] like Figure 8 As shown, two OIS coils 61 are provided on the main circuit board 60, and an OIS position sensor is provided below each OIS coil 61 to realize position monitoring during movement in the X-axis and Y-axis directions.

[0077] In one embodiment, reference is made to Figure 8 The top of the base 20 is provided with a sensor clearance groove 21. When the main circuit board 60 is placed on the base 20, the OIS position sensor is located in the sensor clearance groove 21.

[0078] In one embodiment, reference is made to Figures 3 to 5 Several OIS magnets 31 are installed inside the frame 30. (Refer to...) Figure 9 The base 20 is equipped with several magnetic plates 22, each magnetic plate 22 being positioned opposite to and attracting a corresponding OIS magnet 31. The attraction between the magnetic plates 22 and the OIS magnet 31 allows the frame 30 to be stably supported by the ball bearings at the two support points and the friction reduction mechanism in a triangular abutment.

[0079] In one embodiment, a main circuit board 60 is disposed on the base 20, located between the base 20 and the frame 30. A plurality of OIS coils 61 are disposed on the main circuit board 60, each OIS coil 61 being opposite to a corresponding OIS magnet 31. When the OIS coil 61 is energized, the frame 30 can move relative to the base 20 in a first or second direction. In this case, the magnetic suction plate 22 is a hollow magnetic suction plate 22 with a hollow structure. The hollow structure of the magnetic suction plate 22 can avoid the OIS coils 61, increasing the relative area between them and the OIS magnet 31, thereby increasing the magnetic attraction force.

[0080] In one embodiment, an OIS magnet mounting groove is provided on the inner side of the frame 30, and an OIS magnet 31 is installed in the OIS magnet mounting groove.

[0081] In one embodiment, an AF magnet mounting groove is provided on one side of the carrier, and an AF magnet 41 is installed in the AF magnet mounting groove.

[0082] In one embodiment, reference is made to Figure 7 The frame 30 contains a built-in metal 34, which is positioned opposite to and attracted to the OIS magnet 31. This attraction between the built-in metal 34 and the OIS magnet 31 improves the stability of the OIS magnet installation and the overall structural strength of the frame 30.

[0083] When there are multiple OIS magnets 31, each OIS magnet 31 is provided with a frame-in-metal 34, and each frame-in-metal 34 can be independent of each other or connected to each other.

[0084] In one embodiment, the main circuit board 60 is an FPC board.

[0085] In one embodiment, the main circuit board 60 has an L-shaped structure.

[0086] In one embodiment, a connection terminal for connecting to external circuitry is provided on one side of the main circuit board 60.

[0087] like Figure 8 As shown, in the L-shaped main circuit board 60, an OIS coil is set on each of the two sides. An OIS position sensor is set at the bottom of one side, and a connection terminal for connecting to external circuitry is set on one side of the other side.

[0088] In one embodiment, reference is made to Figure 2 and Figure 3 The carrier 40 has anti-collision rubber blocks 42 at the top and bottom of the third direction to prevent collisions during AF movement.

[0089] In one embodiment, reference is made to Figures 3 to 6 The carrier 40 has a carrier AF guide groove 43 on its outer side wall and a frame AF guide groove 35 on its inner side wall. The carrier AF guide groove 43 and the frame AF guide groove 35 are arranged opposite each other and an AF guide shaft 56 is provided between them. The carrier AF guide groove 43 and the frame AF guide groove 35 abut against the outside of the AF guide shaft 56 to realize the Z-axis direction movement guidance of the carrier.

[0090] In one embodiment, reference is made to Figure 7The frame 30 has a built-in circuit 36, and a metal boss 361 extends from the built-in circuit 36. The metal boss 361 is located at the bottom of the AF guide shaft 56 and is used to support the bottom of the AF guide shaft 56.

[0091] In one embodiment, reference is made to Figure 7 An AF position sensor 37 is mounted on the AF circuit board 32, and the AF position sensor 37 is positioned opposite to the AF magnet 41. The AF position sensor 37 and the AF magnet 41 work together to monitor the movement position of the carrier 40 in the AF direction.

[0092] In one embodiment, reference is made to Figure 6 The carrier AF guide groove 43 on the carrier 40 is located on both sides of the AF magnet 41. (Refer to...) Figures 3 to 6 The frame AF guide groove 35 on the frame 30 is located on both sides of the AF coil 33. That is, the AF guide shaft 56 is located on both sides of the AF magnet 41 and the AF coil 33 to provide a more stable guiding effect.

[0093] In one embodiment, reference is made to Figure 6 An adsorption metal sheet 38 is provided on the outer side of the AF circuit board 32. The adsorption metal sheet 38 and the AF magnet 41 are arranged opposite to each other and are attracted to each other. The adsorption force generated between the adsorption metal sheet 38 and the AF magnet 41 keeps the carrier 40 in contact with the AF guide shaft 56, preventing the AF guide shaft 56 from falling out of the AF guide groove.

[0094] In one embodiment, reference is made to Figure 1 and Figure 2 The lens driving device also includes several upper springs 70. The AF circuit board 32 and the AF coil 33 are energized through the upper springs 70. Specifically, several upper springs 70 are respectively connected between the top of the frame 30 and the top of the carrier 40, and one of the upper springs 70 is connected to the AF circuit board 32.

[0095] Reference Figure 2 , Figure 8 and Figure 9 The base 20 is provided with a support protrusion 23. The top of each support protrusion 23 is connected to one or more upper spring plates 70. The current provided by the base built-in circuit 24 in the base 20 is transmitted through a support protrusion 23 to the AF circuit board 32 and AF coil 33 via an independent upper spring plate 70 and the frame built-in circuit 36 ​​in the frame 30.

[0096] In one embodiment, reference is made to Figure 8There are four support protrusions 23. Three of the support protrusions 23 are located at the three corners of the base 20. The ball grooves and OIS balls 51 at the two opposite corners are located inside the support protrusions 23. The remaining support protrusion 23 is located on the side of the friction reduction mechanism.

[0097] Since a friction-reducing mechanism is installed at one corner of the base 20, a support protrusion 23 is not provided at that corner. Instead, the support protrusion 23 is moved from the corner to the side of the friction-reducing mechanism, thus achieving proper avoidance of the friction-reducing mechanism.

[0098] like Figure 8 As shown, a Y-axis guide groove is provided at one corner of the base 20, so the support protrusion 23 is not located at the corner, but is located on the side of the Y-axis guide groove.

[0099] In one embodiment, the main circuit board 60 is connected to the base built-in circuit 24 disposed in the support protrusion 23 through the internal circuit of the circuit board, so as to achieve the purpose of power supply through the support protrusion 23.

[0100] 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, the frame being located on the base and configured to be movable relative to the base along a first direction and a second direction, the carrier being located within the frame and configured to be movable relative to the frame along a third direction; characterized in that The base has a ball groove at each of the two opposite corners, and an OIS ball is placed in the ball groove. The upper end of the OIS ball is in contact with the bottom end of the corner of the frame. A friction-reducing mechanism is provided between the bottom of another corner of the base and the bottom of another corner of the frame. The friction-reducing mechanism and the two OIS balls form a triangular support structure.

2. The lens driving device according to claim 1, wherein The friction reduction mechanism includes a support plate, a plurality of friction reduction guide structures, a first direction guide groove and a second direction guide groove. The support plate is located between the base and the frame. The plurality of friction reduction guide structures are disposed on the support plate. One of the first direction guide groove and the second direction guide groove is disposed at the corner of the base and the other is disposed at the bottom of the corner of the frame. At least one end of the friction reduction guide structure is located in the first direction guide groove, and at least one end of the other friction reduction guide structure is located in the second direction guide groove. Alternatively, the friction-reducing mechanism includes a support plate, a plurality of friction-reducing guide structures, a first directional guide groove, and a second directional guide groove. The support plate is located between the base and the frame. The first directional guide groove and the second directional guide groove are disposed on the support plate. At least one of the friction-reducing guide structures is disposed at a corner position of the base, with one end located within one of the first directional guide groove and the second directional guide groove. At least another friction-reducing guide structure is disposed at the bottom corner position of the frame, with one end located within the other of the first directional guide groove and the second directional guide groove.

3. The lens driving apparatus according to claim 2, wherein The friction-reducing guide structure is one of a ball bearing, a hemispherical structure, or a guide cylinder structure. And / or, the friction-reducing guide structure is fixedly connected to or integrally formed with the support plate, or the friction-reducing guide structure is fixedly connected to or integrally formed with the base or the frame; And / or, several of the friction-reducing guide structures are disposed on the support plate, the support plate is provided with four guide structure receiving slots, the four guide structure receiving slots are arranged in a cross shape, the friction-reducing guide structures disposed on two diagonally opposite guide structure receiving slots serve as first direction guide structures, one end of the first direction guide structure is located in the first direction guide slot, and the friction-reducing guide structures disposed on the other two diagonally opposite guide structure receiving slots serve as second direction guide structures, one end of the second direction guide structure is located in the second direction guide slot.

4. The lens driving apparatus according to claim 1, wherein Several OIS magnets are installed inside the frame. A main circuit board is provided on the base. The main circuit board is located between the base and the frame. Several OIS coils are provided on the main circuit board. Each OIS coil is opposite to a corresponding OIS magnet. After the OIS coil is energized, the frame can move relative to the base in a first direction or a second direction.

5. The lens driving apparatus according to claim 4, wherein Two OIS position sensors are provided at the bottom of the main circuit board, and the OIS position sensors are positioned opposite to one of the OIS magnets.

6. The lens driving apparatus according to claim 5, wherein The base has a sensor clearance groove at its top, and the OIS position sensor is located in the sensor clearance groove.

7. The lens driving apparatus according to claim 4, wherein The frame contains a built-in metal element, which is positioned opposite to and attracted to the OIS magnet.

8. The lens driving apparatus according to claim 1, wherein Several OIS magnets are installed inside the frame, and several magnetic plates are provided inside the base. Each magnetic plate is arranged opposite to and attracts a corresponding OIS magnet.

9. The lens driving apparatus according to claim 8, wherein The frame contains a built-in metal element, which is positioned opposite to and attracted to the OIS magnet.

10. The lens driving apparatus according to claim 8, wherein The base is provided with a main circuit board, which is located between the base and the frame. The main circuit board is provided with a plurality of OIS coils, each of which is arranged opposite to a corresponding OIS magnet. After the OIS coil is energized, the frame can move relative to the base in a first direction or a second direction. The magnetic suction plate is a hollow magnetic suction plate with a hollow structure.

11. The lens driving device according to any one of claims 4 to 7 or 10, wherein The main circuit board is an FPC board; And / or, the main circuit board has an L-shaped structure; And / or, one side of the main circuit board is provided with a connection terminal for connecting to external circuits.

12. The lens driving apparatus according to claim 1, wherein The carrier is provided with anti-collision rubber blocks at its top and bottom ends in a third direction; And / or, AF guide grooves are respectively provided on the outer side wall of the carrier and the inner side wall of the frame, and an AF guide shaft is provided between the two AF guide grooves arranged opposite to each other, and the AF guide grooves are abutting and connected to each other.

13. The lens driving device as claimed in claim 12, characterized in that, The frame contains built-in wiring, and metal bosses extend from the built-in wiring. The metal bosses are located at the bottom of the AF guide shaft.

14. The lens driving apparatus according to any one of claims 1 to 10 or 12 to 13, wherein An AF magnet is provided on the outer side of the carrier, an AF circuit board is provided on the side wall of the frame, an AF coil is installed on the inner side of the AF circuit board, the AF coil is arranged opposite to the AF magnet, and after the AF coil is energized, the carrier can move relative to the frame in a third direction.

15. The lens driving apparatus according to claim 14, wherein An AF position sensor is provided on the AF circuit board, and the AF position sensor is positioned opposite to the AF magnet.

16. The lens driving apparatus according to claim 14, wherein AF guide grooves are respectively provided on the outer side wall of the carrier and the inner side wall of the frame. An AF guide shaft is provided between the two AF guide grooves that are arranged opposite each other. The AF guide grooves are connected to each other. The AF guide grooves on the carrier are located on both sides of the AF magnet, and the AF guide grooves on the frame are located on both sides of the AF coil.

17. The lens driving apparatus according to claim 16, wherein An adsorption metal sheet is provided on the outside of the AF circuit board, and the adsorption metal sheet is arranged opposite to the AF magnet and attracts each other.

18. The lens driving apparatus according to claim 16, wherein The frame contains built-in wiring, and metal bosses extend from the built-in wiring. The metal bosses are located at the bottom of the AF guide shaft.

19. The lens driving apparatus of claim 14, wherein The lens driving device also includes a plurality of upper springs, which are respectively connected between the top of the frame and the top of the carrier, and one of the upper springs is connected to the AF circuit board; The base is provided with support protrusions, and the top of each support protrusion is connected to one or more corresponding upper spring plates. The current provided by the base built-in circuit in the base is transmitted sequentially through an independent upper spring plate, the frame built-in circuit in the frame, to the AF circuit board and the AF coil through one of the support protrusions.

20. The lens driving apparatus according to claim 19, wherein There are four support protrusions, three of which are located at the three corners of the base. The ball grooves and OIS balls at the two opposite corners are located inside the corresponding support protrusions, and one of the support protrusions is located on the side of the friction reduction mechanism.

21. The lens driving apparatus of claim 19, wherein the lens driving apparatus further comprises a lens driving unit for moving the lens along the optical axis. The base is provided with a main circuit board, which is located between the base and the frame. The main circuit board is connected to the base's built-in circuitry located in the support protrusion through the internal circuitry of the circuit board.

22. The lens driving apparatus according to claim 21, wherein The main circuit board is an FPC board.

23. The lens driving apparatus of claim 21, wherein the lens driving apparatus further comprises a lens driving unit for moving the lens along the optical axis. The main circuit board has an L-shaped structure.

24. The lens driving apparatus of claim 21, wherein One side of the main circuit board is provided with a connection terminal for connecting to external circuits.

25. The lens driving apparatus of claim 1, wherein The lens driving device also includes a housing, which is detachably connected to the base and forms a hollow cavity. The frame, the carrier, the OIS ball bearings, and the friction reduction mechanism are all disposed within the hollow cavity.

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