Lens driving device

Abstract

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device which comprises a base, a frame, a carrier and a support guide shaft, and the carrier is located in the frame and can move in the third direction relative to the frame. The support guide shaft is of an L-shaped structure formed by fixedly connecting a first guide shaft and a second guide shaft which are perpendicular to each other, the support guide shaft is movably installed in a support guide shaft installation groove in the bottom end of the frame, the two ends of the first guide shaft are placed in two base side guide shaft grooves in the base, one end of the second guide shaft is fixed to the first guide shaft, and the other end of the second guide shaft is fixed to the frame. The other end of the second guide shaft is placed on the base, the axial direction of the first guide shaft and the axial direction of the base side guide shaft groove are both the first direction, and the axial direction of the second guide shaft is the second direction. According to the invention, the stable movement of the frame and the carrier in the OIS direction can be realized, and the support guide shaft is arranged in the frame, so that compared with the prior art, a certain height space is saved, and the overall height of the lens driving device is reduced.

Description

Lens drive device Technical Field

[0001] This invention 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] Currently, existing lens drive devices generally achieve autofocus and image stabilization by moving a carrier and the lens connected to the carrier relative to a base in three axes. During OIS (Optical Image Stabilization) operation, a movable support structure is typically added between the frame and the base to ensure smooth movement. For example, the movable support is placed on the base, and the frame is placed on the movable support. The movable support moves the frame relative to the base in the X-axis direction and the frame relative to the movable support in the Y-axis direction, thereby allowing the carrier mounted on the frame and the lens within the carrier to move relative to the base in the X and Y axes. However, this movable support structure increases the height of the lens drive device, which contradicts the goal of miniaturization. Summary of the Invention

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

[0006] A lens driving device includes a base, a frame, and a carrier, wherein the carrier is located within the frame and can move relative to the frame in a third direction.

[0007] The lens driving device also includes:

[0008] The bracket guide shaft is formed by a first guide shaft and a second guide shaft that are perpendicular to each other and are fixedly connected to form an L-shaped structure. The bracket guide shaft is movably installed in the bracket guide shaft mounting groove at the bottom of the frame. The two ends of the first guide shaft are placed in two base-side guide shaft grooves on the base. One end of the second guide shaft is fixed to the first guide shaft, and the other end of the second guide shaft is placed on the base. The axial direction of the first guide shaft and the axial direction of the base-side guide shaft groove are both in a first direction, and the axial direction of the second guide shaft is in a second direction.

[0009] The frame together with the carrier can move relative to the base in a first direction. The first guide shaft slides axially in the guide shaft groove on the side of the base. The second guide shaft, carrying the bracket guide shaft, moves with the frame in the first direction.

[0010] The frame together with the carrier can move relative to the bracket guide shaft and the base in a second direction. The first guide shaft is restricted in the guide shaft groove on the side of the base, and the second guide shaft slides in the bracket guide shaft mounting groove in a second direction.

[0011] Optionally, the axis of the first guide shaft and the axis of the second guide shaft are located on the same horizontal plane.

[0012] Optionally, the outer diameter of the first guide shaft is the same as the outer diameter of the second guide shaft.

[0013] Optionally, support protrusions are provided at three adjacent corner positions on the base, wherein two of the support protrusions in the first direction are respectively provided with base side guide shaft grooves, and the other support protrusion is provided with a first sliding protrusion. The length direction of the first sliding protrusion is the first direction, and the other end of the second guide shaft is placed on the first sliding protrusion.

[0014] Optionally, the bracket guide shaft mounting groove is composed of a first mounting groove and a second mounting groove. The length direction of the first mounting groove is a first direction and the first guide shaft is movably mounted thereon. The length direction of the second mounting groove is a second direction and the second guide shaft is movably mounted thereon. Both ends of the second mounting groove are open structures, and the end of the first mounting groove near the second mounting groove is an open structure.

[0015] Optionally, the groove wall in the width direction of the first mounting groove has a preset gap with the first guide shaft, and a second sliding protrusion is provided in the first mounting groove, with the top end of the first guide shaft contacting the second sliding protrusion.

[0016] Optionally, a first directional coil and a second directional coil are respectively provided on the base, and a first directional magnet and a second directional magnet are respectively provided at the bottom of the frame, which are opposite to the first directional coil and opposite to the second directional coil.

[0017] After the first direction coil is energized, the frame, together with the bracket guide shaft and the carrier, moves relative to the base along the first direction;

[0018] After the second-direction coil is energized, the frame together with the carrier moves relative to the support guide shaft and the base along the second direction;

[0019] The first directional magnet and the second directional magnet are located below the mounting groove of the bracket guide shaft, and the first directional magnet and the second directional magnet limit the position of the bracket guide shaft in a third direction.

[0020] Optionally, both the first directional coil and the second directional coil are powered by the base's built-in wiring, which is used for electrical connection with external circuits.

[0021] Optionally, the base is provided with a coil power supply circuit board, which is electrically connected to the first directional coil and the second directional coil respectively, and supplies power to the first directional coil and the second directional coil by the coil power supply circuit board.

[0022] Optionally, the bottom end of the frame is provided with two magnet mounting slots, and the first directional magnet and the second directional magnet are respectively installed in the two magnet mounting slots, which are located below the bracket guide shaft mounting slot.

[0023] Optionally, a frame-embedded metal is pre-embedded within the frame, and the frame-embedded metal is exposed in the two magnet mounting slots. The top of the magnet in the first direction and the top of the magnet in the second direction are each provided with a magnet patch with a metal structure, and the top of the magnet patch is connected to the frame-embedded metal.

[0024] Optionally, a third-direction coil is provided on the inner wall of the frame, and a third-direction magnet is provided on the side wall of the carrier opposite to the third-direction coil. After the third-direction coil is energized, the carrier moves relative to the frame in the third direction.

[0025] Optionally, a third-direction guide shaft is provided between the inner wall of the frame and the outer wall of the carrier. The axial direction of the third-direction guide shaft is in the third direction and it is fixedly connected to the inner wall of the frame. The carrier can slide in the third direction along the third-direction guide shaft.

[0026] 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, and the support guide shaft are all disposed in the hollow cavity.

[0027] Optionally, the lens driving device further includes a connecting circuit board, which is an elastic structure. One end of the connecting circuit board is connected to the base and to the base-built-in circuitry within the base. The other end of the connecting circuit board is connected to the frame and to the frame-built-in circuitry within the frame or to an electrical device on the frame, thereby establishing an electrical connection between the base-built-in circuitry and the frame-built-in circuitry or electrical device through the connecting circuit board.

[0028] Optionally, at least one corner of the base is provided with a support protrusion, the support protrusion is provided with the base's built-in circuit, and one end of the connecting circuit board is connected to the support protrusion and electrically connected to the base's built-in circuit.

[0029] Optionally, the connecting circuit board includes a first-direction bending plate and a second-direction bending plate that are connected to each other. The length direction of the first-direction bending plate intersects the length direction of the second-direction bending plate. One end of the first-direction bending plate is connected to the base and to the base-built-in circuitry within the base. The other end of the first-direction bending plate is connected to or connected to one end of the second-direction bending plate via a transition circuit board. The other end of the second-direction bending plate is connected to the frame and to the frame-built-in circuitry within the frame or to an electrical device on the frame.

[0030] When the frame, together with the support guide shaft and the carrier, moves relative to the base along a first direction, one of the bending plate in the first direction and the bending plate in the second direction bends. After the movement in the first direction ends, the elastic action of the connecting circuit board resets the frame, together with the support guide shaft and the carrier.

[0031] When the frame and the carrier move relative to the support guide shaft and the base in the second direction, the other of the first-direction bending plate and the second-direction bending plate bends. After the movement in the second direction is completed, the elastic action of the connecting circuit board resets the frame and the carrier.

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

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

[0034] Optionally, the first directional bending plate and the second directional bending plate are integrally formed.

[0035] Optionally, the length direction of the first-direction bending plate is consistent with or substantially consistent with the second direction, and the length direction of the second-direction bending plate is consistent with or substantially consistent with the first direction.

[0036] Optionally, a drive circuit board is provided on one side wall of the frame, the drive circuit board is connected to the connecting circuit board, and a third-direction coil is provided inside the drive circuit board, and the drive circuit board supplies power to the third-direction coil;

[0037] A third-direction magnet is provided on the side wall of the carrier, which is opposite to the third-direction coil. After the third-direction coil is energized, the carrier moves relative to the frame in the third direction.

[0038] Optionally, an adsorption iron sheet is provided on the outside of the drive circuit board, and the adsorption iron sheet is arranged opposite to and adsorbs each other with the third-party magnet.

[0039] Optionally, the drive circuit board is an FPC board.

[0040] A lens driving mechanism, the lens driving mechanism comprising:

[0041] The lens driving device described above in this invention;

[0042] An aperture adjustment device is provided for adjusting the aperture size of the lens. The aperture adjustment device is located on the top of the lens drive device, and the power supply terminal of the aperture adjustment device is electrically connected to the other end of the connecting circuit board.

[0043] Beneficial effects: The present invention has at least one or more of the following advantages:

[0044] 1. This invention abandons the design of adding a movable support structure between the bottom of the frame and the base in the traditional stacked frame structure. Instead, this invention replaces the movable support structure with a support guide shaft formed by a fixed connection of a first guide shaft and a second guide shaft that are perpendicular to each other. This not only enables the frame and the carrier to move smoothly in the OIS direction, but also saves a certain amount of height space compared with the prior art because the support guide shaft is set inside the frame, thus reducing the overall height of the lens driving device.

[0045] 2. In this invention, when the frame, along with the support guide shaft and the carrier, moves relative to the base in a first direction, the guide shaft groove on the base side provides guidance and limitation for the first guide shaft's movement in the first direction, ensuring that the first guide shaft can only move in the first direction and cannot move in the second direction. To improve the sliding effect of the second guide shaft, a first sliding protrusion is provided, allowing the second guide shaft to slide in the first direction on the first sliding protrusion.

[0046] In order to improve the sliding effect of the first guide shaft, when the frame and the carrier move in a second direction relative to the base, the present invention provides a first sliding protrusion so that the top of the first guide shaft contacts it and slides relative to it in a second direction.

[0047] 3. In this invention, the OIS magnet, namely the first direction magnet and the second direction magnet, is installed below the bracket guide shaft mounting groove. This ensures that the OIS magnet and the OIS coil below, namely the first direction coil and the second direction coil, are positioned opposite each other without obstruction. After the OIS magnet is installed, it will limit the position of the bracket guide shaft in the bracket guide shaft mounting groove in a third direction, preventing the bracket guide shaft from detaching from the bracket guide shaft mounting groove.

[0048] 4. This invention features a metal magnetic patch on the top of the OIS magnet, which facilitates the adsorption and installation of the OIS magnet and prevents magnetic leakage. The OIS magnet is magnetically connected or welded to the built-in metal of the frame via the top of the magnetic patch, achieving stable installation. After the magnetic patch and OIS magnet are installed, the position of the bracket guide shaft located in the bracket guide shaft mounting groove is defined.

[0049] 5. The present invention provides a flexible connecting circuit board between the base and the frame, which electrically connects the built-in circuitry of the base to the built-in circuitry of the frame or the electrical device on the frame, and can provide power to the built-in circuitry of the frame or the electrical device on the frame.

[0050] Furthermore, when the frame and carrier move in the first direction, the first-direction bending plate bends; when the frame and carrier move in the second direction, the second-direction bending plate bends; after the movement ends, the elasticity of the connecting circuit board can assist in the frame's reset.

[0051] Meanwhile, the connecting circuit board can support and pull the frame, stably abutting the bracket guide shaft against the base, thus improving the overall structural stability.

[0052] 6. When the aperture adjustment device needs to be added to the top of the lens driving device to adjust the amount of light, the power supply line of the aperture adjustment device can be connected to the top position of the connecting circuit board (i.e., the position connected to the frame / the position connected to the driving circuit board), so as to facilitate the connection of the power supply structure of the variable aperture. Attached Figure Description

[0053] Figure 1 is a schematic diagram of one structure of the present invention;

[0054] Figure 2 is an exploded view of Figure 1;

[0055] Figure 3 is a schematic diagram of the other structures in Figure 1, excluding the outer shell, from another angle.

[0056] Figure 4 is an exploded view of Figure 3;

[0057] Figure 5 shows the positional relationship between the base and the bracket guide shaft in Figure 3;

[0058] Figure 6 is a further exploded view of the other structures in Figure 3, excluding the base;

[0059] Figure 7 is a schematic diagram of Figure 6 from another angle;

[0060] Figure 8 is a structural schematic diagram of the framework portion of the present invention;

[0061] Figure 9 is an exploded view of Figure 8;

[0062] Figure 10 is a further exploded view of Figure 9;

[0063] Figure 11 is a schematic diagram of the frame in Figure 10 from another angle;

[0064] Figure 12 is an exploded view of one structure of the lens driving mechanism of the present invention. Detailed Implementation

[0065] 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.

[0066] 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 the 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.

[0067] 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.

[0068] In the following description, in order to clearly demonstrate the structure and operation of the present invention, 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.

[0069] 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.

[0070] Example 1:

[0071] Referring to Figures 1 to 11, an embodiment of the present invention provides a lens driving device, which mainly includes a housing 10, a base 20, a frame 30, a carrier 40, and a support guide shaft 50.

[0072] 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, and the support guide shaft 50 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.

[0073] The frame 30 is configured to move relative to the base 20 along the X-axis and Y-axis. The carrier 40 is located within the frame 30 and is configured to move relative to the frame 30 along the Z-axis.

[0074] The lens drive device has a lens through hole in the middle along the optical axis (i.e., the Z-axis) to avoid or accommodate the lens. The lens is installed in the carrier 40. When the carrier 40 moves, it can drive the lens to move along its optical axis, i.e., 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, thereby realizing the three-axis movement operation of the lens.

[0075] The bracket guide shaft 50 is formed by a first guide shaft 51 and a second guide shaft 52 that are perpendicular to each other and are fixedly connected to form an L-shaped structure. The bracket guide shaft 50 is movably installed in the bracket guide shaft mounting groove at the bottom of the frame 30. Both ends of the first guide shaft 51 extend out of the bracket guide shaft mounting groove and are placed in the two base-side guide shaft grooves 21 on the base 20. One end of the second guide shaft 52 is fixed to the first guide shaft 51. Preferably, the second guide shaft 52 is fixed to any end of the first guide shaft 51 and has a predetermined distance from the end of the first guide shaft 51, so that the end of the first guide shaft 51 can be placed in the base-side guide shaft groove 21 and has a stroke that can move along the X-axis direction. The other end of the second guide shaft 52 is placed on the base 20. The axial direction of the first guide shaft 51 and the axial direction of the base-side guide shaft groove 21 are both in the X-axis direction, and the axial direction of the second guide shaft 52 is in the Y-axis direction.

[0076] With the above design, the frame 30 of the present invention does not directly abut against the base 20, but is set on the base 20 through the bracket guide shaft 50. Only the bracket guide shaft 50 is in contact with the base 20, which greatly reduces the contact area when the frame 30 moves relative to the base 20 in the X-axis and Y-axis directions.

[0077] When the frame 30 and the carrier 40 move relative to the base 20 in the X-axis direction, the first guide shaft 51 slides along the axial direction of the base side guide shaft groove 21, which is the X-axis direction, within the base side guide shaft groove 21. The second guide shaft 52, carrying the bracket guide shaft 50, follows the frame 30 in the X-axis direction. In other words, the frame 30, the bracket guide shaft 50, and the carrier 40 move relative to the base 20 in the X-axis direction.

[0078] When the frame 30 and the carrier 40 move relative to the base 20 in the Y-axis direction, the first guide shaft 51 will not move due to the obstruction of the guide shaft groove 21 on the base side. Due to the restriction of the guide shaft groove 21 on the base side, the bracket guide shaft 50 and the base 20 remain stationary. The top end of the first guide shaft 51 slides relative to the bracket guide shaft mounting groove in the Y-axis direction, and the top end of the second guide shaft 52 also slides in the bracket guide shaft mounting groove along the Y-axis direction. In other words, the frame 30 and the carrier 40 move relative to the bracket guide shaft 50 and the base 20 in the Y-axis direction.

[0079] Through the above design, the movement of the carrier 40 and the lens inside it in the X and Y axes is achieved.

[0080] This invention abandons the traditional design of adding a movable support structure between the bottom of the frame 30 and the base 20 in the stacked frame 30 structure. Instead, a support guide shaft 50, which is formed by the fixed connection of the first guide shaft 51 and the second guide shaft 52 that are perpendicular to each other, replaces the movable support structure. This not only enables the frame 30 and the carrier 40 to move smoothly in the OIS direction, but also saves a certain amount of height space compared with the prior art because the support guide shaft 50 is set inside the frame 30, thus reducing the overall height of the lens driving device.

[0081] In one embodiment, the axis of the first guide shaft 51 and the axis of the second guide shaft 52 are located on the same horizontal plane. That is, the first guide shaft 51 and the second guide shaft 52 of the bracket guide shaft 50 are located at the same height within the frame 30.

[0082] In one embodiment, the outer diameter of the first guide shaft 51 is the same as the outer diameter of the second guide shaft 52.

[0083] By using the same structure for the first guide shaft 51 and the second guide shaft 52, the bottom end of the bracket guide shaft 50 is stably abutted against the base 20, and the top end of the bracket guide shaft 50 is stably abutted against the bracket guide shaft mounting groove.

[0084] The axial lengths of the first guide shaft 51 and the second guide shaft 52 can be the same or different, and their axial lengths can be determined according to the actual application scenario.

[0085] In one embodiment, referring to Figures 2 to 5, the base 20 has at least three corners, and support protrusions 22 are respectively provided at the three adjacent corner positions on the base 20. Two of the support protrusions 22 in the first direction are respectively provided with base side guide shaft grooves 21, and the other support protrusion 22 is provided with a first sliding protrusion 23. The length direction of the first sliding protrusion 23 is the X-axis direction, and the other end of the second guide shaft 52 is placed on the first sliding protrusion 23.

[0086] The base 20 preferably adopts a rectangular structure, more preferably a rectangular sheet structure, which has four corners, three of which are integrally provided with support protrusions 22.

[0087] When the frame 30 and the carrier 40 move relative to the base 20 in the X-axis direction, the first guide shaft 51 slides along the axial direction of the guide shaft groove 21 on the side of the base, and the bottom end of the second guide shaft 52 slides in the X-axis direction on the first sliding protrusion 23. The sliding effect of the second guide shaft 52 is improved by setting the first sliding protrusion 23.

[0088] In one embodiment, referring to Figures 10 and 11, the bracket guide shaft mounting groove consists of a first mounting groove 31 and a second mounting groove 32. The length direction of the first mounting groove 31 is the X-axis direction, and the first guide shaft 51 is movably mounted thereon. The length direction of the second mounting groove 32 is the Y-axis direction, and the second guide shaft 52 is movably mounted thereon. Both ends of the second mounting groove 32 are open structures. The end of the first mounting groove 31 closest to the second mounting groove 32 is also open. Of course, the open structure of the first mounting groove 31 is connected to the second mounting groove 32 to accommodate the first guide shaft 51 and the second guide shaft 52, which are fixed together. The other end of the first mounting groove 31 away from the second mounting groove 32 can be either an open structure or a closed limiting structure.

[0089] In one embodiment, referring to Figures 10 and 11, the groove walls on one or both sides of the first mounting groove 31 in the width direction (Y-axis direction) have a preset gap with the first guide shaft 51 to reserve space for the top end of the first guide shaft 51 to slide in the Y-axis direction within the first mounting groove 31. To improve the sliding effect of the first guide shaft 51, a second sliding protrusion 33 is provided in the first mounting groove 31, and the top end of the first guide shaft 51 contacts the second sliding protrusion 33.

[0090] When the frame 30 and the carrier 40 move relative to the base 20 in the Y-axis direction, the top end of the first guide shaft 51 contacts the second sliding protrusion 33 and slides relative to it. The top end of the second guide shaft 52 slides within the second mounting groove 32 along the axial direction of the second mounting groove 32, that is, in the Y-axis direction.

[0091] In one embodiment, referring to Figures 10 and 11, the first mounting groove 31 is a rectangular groove, and the bottom surface of the first mounting groove 31 is an open structure. The second mounting groove 32 is a V-shaped groove, and the bottom surface of the second mounting groove 32 is an open structure.

[0092] In one embodiment, referring to Figures 2, 4, and 5, an OIS coil is provided on the base 20, namely a first-direction coil 61 and a second-direction coil 62. Referring to Figure 8, an OIS magnet corresponding to the OIS coil is provided at the bottom of the frame 30, namely a first-direction magnet 63 and a second-direction magnet 64. The first-direction magnet 63 is disposed opposite to the first-direction coil 61. After the first-direction coil 61 is energized, the frame 30, together with the support shaft 50 and the carrier 40, moves relative to the base 20 along a first direction. The second-direction magnet 64 is disposed opposite to the second-direction coil 62. After the second-direction coil 62 is energized, the frame 30, together with the carrier 40, moves relative to the support shaft 50 and the base 20 along a second direction.

[0093] The first direction magnet 63 and the second direction magnet 64 are located below the bracket guide shaft mounting groove, and the bracket guide shaft 50 is limited in a third direction by the first direction magnet 63 and the second direction magnet 64.

[0094] Referring to Figure 8, in a specific implementation, preferably, the first directional magnet 63 is located below the first guide shaft 51 to limit the position of the first guide shaft 51, and the two ends of the first guide shaft 51 protrude from both sides of the first directional magnet 63 and are placed in the guide shaft groove 21 on the base side. The second directional magnet 64 is located below the second guide shaft 52 to limit the position of the second guide shaft 52, and the end of the second guide shaft 52 away from the first guide shaft 51 protrudes from the end of the second directional magnet 64 and is placed on the base 20, the support protrusion 22, or the first sliding protrusion 23.

[0095] In one embodiment, both the first directional coil 61 and the second directional coil 62 are powered by the base-built-in circuitry within the base 20, which is used for electrical connection with external circuitry.

[0096] Alternatively, a coil power supply circuit board can be provided on the base 20. The coil power supply circuit board is electrically connected to the first direction coil 61 and the second direction coil 62 respectively, and the coil power supply circuit board supplies power to the first direction coil 61 and the second direction coil 62.

[0097] In one embodiment, referring to Figures 9 to 11, the bottom end of the frame 30 is provided with two magnet mounting slots 34. A first-direction magnet 63 and a second-direction magnet 64 are respectively installed in the two magnet mounting slots 34, and the two magnet mounting slots 34 are located below the bracket guide shaft mounting slot.

[0098] In one embodiment, referring to Figures 9 to 11, a frame-embedded metal 35 is pre-embedded within the frame 30, and the frame-embedded metal 35 is exposed in two magnet mounting slots 34. Referring to Figures 6 to 10, a metal magnet patch 65 is provided at the top of the first-direction magnet 63 and the top of the second-direction magnet 64, and the top of the magnet patch 65 is connected to the frame-embedded metal 35.

[0099] In this embodiment, a metal magnetic patch 65 is provided on the top of the OIS magnet. This not only facilitates the adsorption and installation of the OIS magnet but also prevents magnetic leakage. In this embodiment, the OIS magnet is connected to the built-in metal 35 of the frame through the top of the magnetic patch 65, achieving stable installation of the OIS magnet. After the magnetic patch 65 and the OIS magnet are installed, the position of the bracket guide shaft 50 located in the bracket guide shaft mounting groove is defined.

[0100] In practice, the top of the magnet patch 65 can be connected to the frame's built-in metal 35 via magnetic attraction or welding, as long as the OIS magnet can be stably installed.

[0101] In one embodiment, referring to FIG6, a third-direction coil 66 (also called an AF coil) is provided on the inner wall of the frame 30. Referring to FIG7, a third-direction magnet 67 (also called an AF magnet) is provided on the side wall of the carrier 40 opposite to the third-direction coil 66. After the third-direction coil 66 is energized, the carrier 40 moves relative to the frame 30 in the third direction.

[0102] In specific implementation, the third directional coil 66 is preferably disposed on the inner wall of the side away from the bracket guide shaft 50. For example, when the frame 30 is a rectangular frame, a first mounting groove 31 and a second mounting groove 32 are provided at the bottom of adjacent two sides of the frame, and the third directional coil 66 is disposed on the inner wall of the other side of the frame away from the first mounting groove 31 and the second mounting groove 32.

[0103] In one embodiment, referring to Figures 3 to 4, 6 and 7, a third-direction guide shaft 68 (also called the AF guide shaft) is provided between the inner wall of the frame 30 and the outer wall of the carrier 40. The axial direction of the third-direction guide shaft 68 is the Z-axis direction and it is fixedly connected to the inner wall of the frame 30. The carrier 40 can slide along the third-direction guide shaft 68 in the third direction.

[0104] In a specific implementation, referring to Figure 7, a third-direction guide groove 41 (also called AF guide groove) can be provided on the outer wall of the carrier 40. The length direction of the third-direction guide groove 41 is the Z-axis direction. The third-direction guide groove 41 contacts the third-direction guide shaft 68, and the third-direction guide shaft 68 and the third-direction guide groove 41 can slide relative to each other.

[0105] The number of third-direction guide shafts 68 can be set to one or more according to the actual scenario requirements. It is preferred to set two, with the two third-direction guide shafts 68 located on the same side of the inner wall of the frame 30, and preferably located on both sides of the third-direction coil 66.

[0106] In this embodiment, a third-direction guide shaft 68 is provided between the outer wall of the carrier 40 and the frame 30. When the carrier 40 moves in the Z-axis direction, it slides along the third-direction guide shaft 68 through the third-direction guide groove 41 on the outer wall, thus ensuring the stability of the carrier 40 when it moves in the Z-axis direction.

[0107] In one embodiment, referring to Figures 1 to 7, the lens driving device further includes a connecting circuit board 70. The connecting circuit board 70 is an elastic structure. One end of the connecting circuit board 70 is connected to the base 20 and connected to the base-built-in circuit inside the base 20. The other end of the connecting circuit board 70 is connected to the frame 30 and connected to the frame-built-in circuit inside the frame 30 or the electrical device on the frame 30, so that an electrical connection is established between the base-built-in circuit and the frame-built-in circuit or the electrical device through the connecting circuit board 70.

[0108] In specific implementation, a base power-on point can be provided on the base 20, which is electrically connected to the internal base wiring. One end of the connecting circuit board 70 is fixedly soldered to the base power-on point. Similarly, a frame power-on point can be provided on the frame 30, which is electrically connected to the internal frame wiring or electrical devices on the frame. The other end of the connecting circuit board 70 is fixedly soldered to the frame power-on point. With this design, an electrical connection is established between the base's internal wiring and the frame's internal wiring or electrical devices on the frame via the connecting circuit board 70, allowing power to be supplied to the frame's internal wiring or electrical devices through the base's internal wiring.

[0109] In one embodiment, referring to Figures 2 to 5, at least one corner of the base 20 is provided with a support protrusion 22, and the support protrusion 22 is provided with a base built-in circuit. One end of the connecting circuit board 70 is connected to the support protrusion 22 and electrically connected to the base built-in circuit.

[0110] In practice, a base power-on point can be provided on the support protrusion 22. The base power-on point is electrically connected to the internal base circuit, and one end of the connecting circuit board 70 is fixedly soldered to the base power-on point.

[0111] In one embodiment, referring to Figures 1 to 7, the connecting circuit board 70 includes a first-direction bending plate 71 and a second-direction bending plate 72 connected to each other. The length direction of the first-direction bending plate 71 intersects the length direction of the second-direction bending plate 72, meaning they are not parallel. One end of the first-direction bending plate 71 is connected to the base 20 and to the base-built-in wiring within the base 20. The other end of the first-direction bending plate 71 is connected to or connected via a transition circuit board to one end of the second-direction bending plate 72. The other end of the second-direction bending plate 72 is connected to the frame 30 and to the frame-built-in wiring within the frame 30 or to an electrical device on the frame 30.

[0112] When the frame 30, together with the support guide shaft 50 and the carrier 40, moves relative to the base 20 along the X-axis, one of the first direction bending plate 71 and the second direction bending plate 72 is bent. After the movement in the X-axis direction is completed, the elastic action of the connecting circuit board 70 resets the frame 30, together with the support guide shaft 50 and the carrier 40.

[0113] When the frame 30 and the carrier 40 move relative to the support guide shaft 50 and the base 20 along the Y-axis, the other of the first direction bending plate 71 and the second direction bending plate 72 is bent. After the movement in the Y-axis direction is completed, the elastic action of the connecting circuit board 70 resets the frame 30 and the carrier 40.

[0114] In this embodiment, the connecting circuit board 70 is provided with a first-direction bending plate 71 and a second-direction bending plate 72 whose length directions intersect in space. Therefore, with the connecting circuit board 70 configured as described above, taking the length direction of the first-direction bending plate 71 being consistent with or approximately consistent with the Y-axis direction, and the length direction of the second-direction bending plate 72 being consistent with or approximately consistent with the X-axis direction as an example, when the frame 30, together with the support guide shaft 50 and the carrier 40, moves in the X-axis direction, the first-direction bending plate 71 bends, and when the frame 30 and the carrier 40 move in the Y-axis direction, the second-direction bending plate 72 bends. After the movement is completed, the elastic effect of the connecting circuit board 70 can play an auxiliary reset effect on the frame 30.

[0115] The phrase "approximately the same" means that the length directions of the first-direction bending plate 71 and the second-direction bending plate 72 can be non-strictly parallel to the X-axis or Y-axis. In other words, the length direction of the first-direction bending plate 71 can have a small angle with the X-axis, and the length direction of the second-direction bending plate 72 can have a small angle with the Y-axis. This angle can be determined based on the actual scenario, for example, an angle no greater than 30 degrees or 45 degrees. As shown in Figure 3, the length direction of the first-direction bending plate 71 is parallel to the Y-axis, and the length direction of the second-direction bending plate 72 is parallel to the X-axis.

[0116] Since the connecting circuit board 70 in this embodiment is straddling the base 20 and the frame 30, the connecting circuit board 70 can support and pull the frame 30, and stably abut the bracket guide shaft 50 against the base 20, thereby improving the overall structural stability.

[0117] The connecting circuit board 70 in this embodiment can also be replaced by a spring, but the connecting circuit board 70 has better flexibility than the spring. Therefore, this embodiment adopts the design of the connecting circuit board 70. The connecting circuit board 70 can not only provide power to the electrical devices at the frame 30, but also expand the range of motion of the support guide shaft 50 and the frame 30.

[0118] In one embodiment, the connecting circuit board 70 is an FPC board.

[0119] In one embodiment, the connecting circuit board 70 has an L-shaped structure.

[0120] In one embodiment, the first direction bending plate 71 and the second direction bending plate 72 are integrally formed.

[0121] In practical implementation, the connected circuit board 70 is designed to be bent horizontally to have at least two sides, one side being a first-direction bending plate 71 and the other side being a second-direction bending plate 72.

[0122] In one embodiment, the length direction of the first-direction bending plate 71 is consistent with or approximately consistent with the Y-axis direction, and the length direction of the second-direction bending plate 72 is consistent with or approximately consistent with the X-axis direction.

[0123] Of course, the length directions of the first-direction bending plate 71 and the second-direction bending plate 72 can be set in opposite directions. At this time, when the frame 30 and the carrier 40 move in the X-axis direction, the second-direction bending plate 72 bends, and when the frame 30 and the carrier 40 move in the Y-axis direction, the first-direction bending plate 71 bends. After the movement is completed, the elasticity of the connecting circuit board 70 can play an auxiliary reset effect on the frame 30.

[0124] In one embodiment, referring to Figures 7 to 10, a drive circuit board 80 is provided on one side wall of the frame 30. The drive circuit board 80 is connected to the connecting circuit board 70 and is energized through the built-in circuitry of the base. A third-direction coil 66 is provided inside the drive circuit board 80, and the drive circuit board 80 supplies power to the third-direction coil 66. A third-direction magnet 67 is provided on the side wall of the carrier 40, which is opposite to the third-direction coil 66. After the third-direction coil 66 is energized, the carrier 40 moves relative to the frame 30 in the third direction.

[0125] In a specific implementation, referring to Figure 10, a coil clearance opening with internal and external communication is provided on one side wall of the frame 30, the drive circuit board 80 is set on this side wall of the frame 30, and the third-direction coil 66 is located in or passes through the coil clearance opening.

[0126] In one embodiment, referring to Figures 7 to 10, an adsorption iron sheet 69 is provided on the outer side of the drive circuit board 80. The adsorption iron sheet 69 and the third-party magnet 67 are arranged opposite to each other and adsorb each other.

[0127] In this embodiment, an adsorption iron sheet 69 is fixedly connected to the outer wall of the drive circuit board 80. It will generate an adsorption force with the third-direction magnet 67, which can prevent the third-direction guide shaft 68 from detaching from the groove.

[0128] In one embodiment, the drive circuit board 80 is an FPC board.

[0129] Example 2:

[0130] Referring to Figure 12, this embodiment of the invention also provides a lens driving mechanism, which includes the lens driving device and aperture adjustment device 90 provided in various embodiments of embodiment 1. The aperture adjustment device 90 is disposed on the top of the lens driving device and is used to adjust the aperture size of the lens. The energized end of the aperture adjustment device 90 is electrically connected to the other end of the connecting circuit board 70, which is the position where it is connected to the frame 30.

[0131] Due to the design of the connecting circuit board 70, when an aperture adjustment device needs to be added to the top of the lens drive device to adjust the amount of light entering, the power supply line of the aperture adjustment device can be connected to the top position of the connecting circuit board 70, which facilitates the connection of the power supply structure for the variable aperture.

[0132] In practice, as shown in Figure 12, the aperture adjustment device 90 can be directly set above the frame 30. When the lens drive device is equipped with a housing 10, the aperture adjustment device 90 is located in the hollow cavity formed by the housing 10 and the base 20. At this time, space should be left for the carrier 40 to move along the Z-axis.

[0133] When the lens drive device is equipped with a housing 10, the aperture adjustment device 90 can also be set on the top of the housing 10. In this case, a clearance opening can be made on the housing 10, through which the power-on terminal of the aperture adjustment device 90 can be electrically connected to the other end of the connecting circuit board 70.

[0134] The aperture adjustment device of the present invention can be any existing device capable of aperture adjustment, and will not be described in detail here.

[0135] The preferred embodiments of the present invention 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 the present invention. 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 carrier being located within the frame and movable relative to the frame in a third direction; characterized in that, The lens driving device further includes: a bracket guide shaft, which is formed by a first guide shaft and a second guide shaft that are perpendicular to each other and fixedly connected to form an L-shaped structure. The bracket guide shaft is movably installed in a bracket guide shaft mounting groove at the bottom of the frame. The two ends of the first guide shaft are placed in two base-side guide shaft grooves on the base. One end of the second guide shaft is fixed to the first guide shaft, and the other end of the second guide shaft is placed on the base. The axial direction of the first guide shaft and the axial direction of the base-side guide shaft groove are both in a first direction, and the axial direction of the second guide shaft is in a second direction. The frame together with the carrier can move relative to the base along the first direction. The first guide shaft slides in the base-side guide shaft groove along the axial direction of the base-side guide shaft groove. The second guide shaft carries the bracket guide shaft and follows the frame to move along the first direction. The frame together with the carrier can move relative to the bracket guide shaft and the base along the second direction. The first guide shaft is confined in the base-side guide shaft groove, and the second guide shaft slides in the bracket guide shaft mounting groove along the second direction.

2. The lens driving device as described in claim 1, characterized in that, The axis of the first guide shaft and the axis of the second guide shaft are located on the same horizontal plane; and / or, the outer diameter of the first guide shaft is the same as the outer diameter of the second guide shaft.

3. The lens driving device as described in claim 1, characterized in that, The base has three adjacent corners with support protrusions. Two of the support protrusions in the first direction are provided with base side guide shaft grooves, and the other support protrusion is provided with a first sliding protrusion. The length direction of the first sliding protrusion is the first direction, and the other end of the second guide shaft is placed on the first sliding protrusion.

4. The lens driving device as described in claim 1, characterized in that, The bracket guide shaft mounting groove is composed of a first mounting groove and a second mounting groove. The length direction of the first mounting groove is a first direction and the first guide shaft is movably mounted thereon. The length direction of the second mounting groove is a second direction and the second guide shaft is movably mounted thereon. Both ends of the second mounting groove are open structures. The end of the first mounting groove near the second mounting groove is an open structure. Preferably, there is a preset gap between the groove wall in the width direction of the first mounting groove and the first guide shaft. A second sliding protrusion is provided in the first mounting groove, and the top end of the first guide shaft contacts the second sliding protrusion.

5. The lens driving device as described in claim 1, characterized in that, The base is respectively provided with a first direction coil and a second direction coil, and the bottom end of the frame is respectively provided with a first direction magnet opposite to the first direction coil and a second direction magnet opposite to the second direction coil. After the first direction coil is energized, the frame, together with the support guide shaft and the carrier, moves relative to the base along the first direction; after the second direction coil is energized, the frame, together with the carrier, moves relative to the support guide shaft and the base along the second direction; the first direction magnet and the second direction magnet are located below the mounting groove of the support guide shaft, and the first direction magnet and the second direction magnet limit the position of the support guide shaft in the third direction; preferably, the first direction coil and the second direction coil are both powered by the base's built-in circuitry. The base has built-in wiring for electrical connection with external circuits; or, the base is provided with a coil power supply circuit board, which is electrically connected to the first directional coil and the second directional coil respectively, and supplies power to the first directional coil and the second directional coil by the coil power supply circuit board; preferably, the bottom end of the frame is provided with two magnet mounting slots, the first directional magnet and the second directional magnet are respectively installed in the two magnet mounting slots, and the two magnet mounting slots are located below the bracket guide shaft mounting slot; more preferably, the frame has embedded frame metal, which is exposed in the two magnet mounting slots, and the top of the first directional magnet and the top of the second directional magnet are provided with metal magnet patches, the top of the magnet patches being connected to the frame's embedded metal.

6. The lens driving device as claimed in claim 1, characterized in that, A third-direction coil is provided on the inner wall of the frame, and a third-direction magnet is provided on the side wall of the carrier opposite to the third-direction coil. After the third-direction coil is energized, the carrier moves relative to the frame in the third direction. Preferably, a third-direction guide shaft is provided between the inner wall of the frame and the outer wall of the carrier. The axis of the third-direction guide shaft is in the third direction and is fixedly connected to the inner wall of the frame. The carrier can slide in the third direction along the third-direction guide shaft.

7. The lens driving device as claimed in claim 1, characterized in that, The lens driving device also includes a housing, which is detachably connected to the base and forms a hollow cavity. The frame, the carrier, and the bracket guide shaft are all disposed in the hollow cavity.

8. The lens driving device according to any one of claims 1 to 7, characterized in that, The lens driving device further includes a connecting circuit board, which is an elastic structure. One end of the connecting circuit board is connected to the base and to the base-embedded wiring within the base. The other end of the connecting circuit board is connected to the frame and to the frame-embedded wiring within the frame or to an electrical device on the frame, thereby establishing an electrical connection between the base-embedded wiring and the frame-embedded wiring or electrical device through the connecting circuit board. Preferably, at least one corner of the base is provided with a support protrusion, and the base-embedded wiring is disposed within the support protrusion. One end of the connecting circuit board is connected to the support protrusion and is electrically connected to the base-embedded wiring. Preferably, the connecting circuit board includes a first-direction bending plate and a second-direction bending plate connected to each other. The length direction of the first-direction bending plate intersects the length direction of the second-direction bending plate. One end of the first-direction bending plate is connected to the base and to the base-embedded wiring within the base. The other end of the first-direction bending plate is connected to or connected via a transition circuit board to one end of the second-direction bending plate. The other end is connected to the frame and to the frame-embedded wiring or electrical device on the frame; when the frame, together with the support guide shaft and the carrier, moves relative to the base in a first direction, one of the first-direction bending plate and the second-direction bending plate bends; after the movement in the first direction ends, the elastic action of the connecting circuit board resets the frame, together with the support guide shaft and the carrier; when the frame, together with the carrier, moves relative to the support guide shaft and the base in a second direction, the other of the first-direction bending plate and the second-direction bending plate bends; after the movement in the second direction ends, the elastic action of the connecting circuit board resets the frame, together with the carrier; more preferably, the connecting circuit board is an FPC board; more preferably, the connecting circuit board has an L-shaped structure; more preferably, the first-direction bending plate and the second-direction bending plate are integrally formed; more preferably, the length direction of the first-direction bending plate is consistent with or approximately consistent with the second direction, and the length direction of the second-direction bending plate is consistent with or approximately consistent with the first direction.

9. The lens driving device as described in claim 8, characterized in that, A drive circuit board is provided on one side wall of the frame, and the drive circuit board is connected to the connecting circuit board. A third-direction coil is provided on the inner side of the drive circuit board, and the drive circuit board supplies power to the third-direction coil. A third-direction magnet is provided on the side wall of the carrier, which is opposite to the third-direction coil. After the third-direction coil is energized, the carrier moves relative to the frame in the third direction. Preferably, an adsorption iron sheet is provided on the outer side of the drive circuit board, and the adsorption iron sheet is opposite to the third-direction magnet and attracts each other. Preferably, the drive circuit board is an FPC board.

10. A lens driving mechanism, the lens driving mechanism comprising an aperture adjustment device, the aperture adjustment device being used to adjust the aperture size of the lens; characterized in that, The lens driving mechanism further includes the lens driving device according to any one of claims 8 to 9; the aperture adjustment device is disposed on the top of the lens driving device, and the power-on terminal of the aperture adjustment device is electrically connected to the other end of the connecting circuit board.

Images