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 shell, a base, a driving mechanism and a lens, connecting built-in metal is arranged in the base, a fixed salient point is arranged on the outer side of the connecting built-in metal and extends out of the peripheral side wall of the base, and the shell is a metal shell. The bottom end of the shell is fixedly connected with the fixed salient point; and the connecting built-in metal comprises a negative electrode circuit board, a grounding pin is arranged on the negative electrode circuit board, and the grounding pin is connected with an external circuit negative electrode or a ground wire outside the base. The base and the shell are fixedly connected through the fixing convex points, and stable buckling between the metal shell and the base is achieved. Due to the design of the grounding pin, the grounding pin is connected with the negative electrode of an external circuit or a ground wire, grounding of the shell is achieved, and the situation that the interior of the lens driving device is affected by current carried on the shell or current generated by accidental touch with other components is avoided.

Description

Technical Field

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

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more popular and are developing in the direction of convenient and lightweight designs to provide users with more choices.

[0003] Some electronic devices with camera or video recording functions are equipped with a lens driving device to drive optical components such as lenses to move, thereby achieving the functions of autofocus and optical image stabilization (OIS). Light can pass through the optical components to form an image on the photosensitive component.

[0004] With the popularity of electronic devices such as smart phones, how to optimize the lens driving devices built into these electronic devices to achieve more stable anti-shake, zoom and imaging quality is something that technical personnel in this field need to actively consider. Summary of the invention

[0005] The present invention aims to solve the above technical problems and provides a lens driving device.

[0006] A lens driving device comprises a housing, a base, a driving mechanism and a lens, wherein the housing and the base form a hollow cavity, the driving mechanism and the lens are located in the hollow cavity, and the driving mechanism drives the lens to perform anti-shake action and zoom action;

[0007] The base is provided with a circuit built-in metal and a connection built-in metal, the circuit built-in metal is connected to an external circuit outside the base, a fixed protrusion is arranged on the outer side of the connection built-in metal, the fixed protrusion extends out of the outer peripheral side wall of the base, the shell is a metal shell, and the bottom end of the shell is fixedly connected to the fixed protrusion to realize the connection between the shell and the base;

[0008] The connecting built-in metal comprises a negative circuit board, a ground pin is arranged on the negative circuit board, and the ground pin is connected to the negative pole or ground wire of the external circuit outside the base.

[0009] Optionally, the connecting built-in metal further includes at least one reinforcing built-in plate.

[0010] Optionally, the fixing protrusion is a welding protrusion, and the bottom end of the shell is connected to the fixing protrusion by welding.

[0011] Optionally, the surface of the ground pin has a plating layer.

[0012] Optionally, the connection built-in metal and the circuit built-in metal are arranged in the base in the same plane.

[0013] Optionally, the connection built-in metal and the circuit built-in metal are layered in the base.

[0014] Optionally, a prism is provided at the bottom end of the base, and the prism has two oppositely arranged reflective surfaces, namely a first reflective surface and a second reflective surface, the two reflective surfaces intersect with the optical axis direction, the first reflective surface is located below the lens, and the second reflective surface extends out of the base avoidance notch on one side of the base.

[0015] Optionally, the driving mechanism includes a first driving mechanism and a second driving mechanism, and the lens includes two coaxially arranged first lenses and second lenses;

[0016] The lens driving device also includes a frame and a carrier, which are located in the hollow cavity. The carrier is installed in the frame and movably connected to the frame. The first lens is fixed on the frame, and the second lens is fixed on the carrier. The first driving mechanism drives the frame to perform an anti-shake action in the hollow cavity, and the second driving mechanism drives the carrier and the second lens to perform a zoom action relative to the frame to change the distance between the second lens and the first lens.

[0017] Optionally, the driving mechanism includes a first driving mechanism and a second driving mechanism;

[0018] The lens driving device also includes a frame and a carrier, which are located in the hollow cavity. The carrier is installed in the frame and movably connected to the frame. The lens is fixed on the carrier. The first driving mechanism drives the frame to perform an anti-shake action in the hollow cavity, and the second driving mechanism drives the carrier and the lens to perform a zoom action relative to the frame.

[0019] Optionally, the first driving mechanism includes an OIS coil arranged in a driving circuit board and a driving magnet arranged on the frame, and the OIS coil and the driving magnet are arranged opposite to each other. The OIS coil and the driving magnet cooperate to drive the frame to perform anti-shake action in the hollow cavity.

[0020] Optionally, a main circuit board is disposed on the base, and the driving circuit board is disposed on an upper end of the main circuit board. The main circuit board is powered by an external circuit outside the base and supplies power to the OIS coil on the driving circuit board.

[0021] Optionally, a control chip is arranged on the inner wall of the main circuit board, and a plurality of position sensors and storage chips are arranged at the bottom of the main circuit board. The control chip is electrically connected to the position sensor, the storage chip and the OIS coil, respectively. One position sensor is arranged relative to a corresponding magnet to realize position monitoring in the OIS direction.

[0022] Optionally, the second driving mechanism includes an AF coil arranged on the outside of the carrier and a driving magnet arranged on the frame, and the AF coil and the driving magnet are arranged opposite to each other, and the AF coil and the driving magnet cooperate to drive the carrier to perform a zoom action relative to the frame.

[0023] Optionally, the lens driving device also includes an upper spring sheet, a lower spring sheet and a power-on rod, the upper spring sheet is connected between the top end of the frame and the top end of the carrier, the lower spring sheet is connected between the bottom end of the frame and the bottom end of the carrier, the power-on rod is arranged at the four corners of the base and suspends the frame and the carrier in the hollow cavity, the lower end of the power-on rod is electrically connected to the built-in metal of the circuit, the upper end of the power-on rod is electrically connected to the upper spring sheet, and the upper spring sheet is electrically connected to the AF coil.

[0024] Optionally, a protruding plate is provided at one end of the carrier, a sensing chip is mounted on the protruding plate, a sensing capacitor is mounted at the bottom of the sensing chip, and the sensing chip is powered by the upper spring sheet via a carrier built-in circuit in the carrier;

[0025] An induction magnet is arranged at the top of one side of the frame, and the induction magnet and the induction capacitor are arranged opposite to each other to realize position monitoring in the zoom direction.

[0026] Optionally, an induction magnet support portion is provided on one side of the bottom end of the frame, and the induction magnet support portion is provided at the bottom end of the induction magnet and adsorbed to the induction magnet.

[0027] Optionally, the lens driving device further comprises a bracket, the bracket is fixed to the top of the frame, and the first lens is fixed on the bracket.

[0028] Optionally, a top end of the first lens extends out from a top end of the housing.

[0029] Optionally, a connecting column is provided on one of the bracket and the frame and a connecting hole is provided on the other, and the connecting column is connected to the connecting hole.

[0030] Optionally, the connecting column is a riveted column, and the connecting column and the connecting hole are connected by riveting.

[0031] Optionally, a frame built-in metal is provided in the frame, a bracket built-in metal is provided in the bracket, and the frame built-in metal is fixedly connected to the bracket built-in metal.

[0032] Optionally, the built-in metal of the bracket is connected to the built-in metal of the frame by welding.

[0033] Optionally, a plurality of bracket support parts are provided on the frame built-in metal, and the frame built-in metal and the bracket built-in metal are fixedly connected by the bracket support parts being fixedly connected to the bracket built-in metal.

[0034] Beneficial effects: The present invention has at least one or more of the following advantages:

[0035] 1. The base and the housing of the present invention are fixedly connected by fixing bumps, and in particular, the base and the bottom edge of the metal housing are welded by welding bumps to achieve stable buckling between the metal housing and the base. In addition, due to the design of the grounding pin, it is connected to the negative pole or ground wire of the external circuit to achieve grounding of the housing, thereby preventing the housing from carrying current or accidentally touching other components to generate current and affecting the interior of the lens driving device.

[0036] 2. The connection built-in metal and the circuit built-in metal of the present invention can be set flush or layered. When the two are flush, that is, kept in the same plane, the base width will increase and the thickness will be thinner. When the two are layered, the base width can be reduced, but the base thickness will increase. In actual use, it can be selected according to the scene requirements.

[0037] 3. The present invention adopts a prism design. After the light enters the lens, it is deflected by the first reflection surface to the second reflection surface, and then deflected out by the second reflection surface, so that the light is turned 180 degrees and enters the image chip on the motor camera module to achieve the imaging effect. This design can reduce the overall thickness of the camera, making the electronic device thinner.

[0038] 4. The lens of the present invention is composed of a first lens and a second lens arranged coaxially, which realizes the adjustment effect of zooming and focusing light, and the adjustment is more convenient and quick, with better imaging quality and better photo and video effects.

[0039] 5. The OIS coil of the present invention is powered by the main circuit board, and the AF coil is powered by the synergistic effect of the built-in metal of the circuit, the power rod and the upper spring sheet, so that the OIS coil and the AF coil are powered relatively independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A structural schematic diagram of the present invention;

[0041] Figure 2for Figure 1 Exploded diagram of

[0042] Figure 3 for Figure 1 Schematic diagram of some structures;

[0043] Figure 4 for Figure 3 A top view of

[0044] Figure 5 for Figure 4 AA section view;

[0045] Figure 6 for Figure 3 Exploded diagram of

[0046] Figure 7 for Figure 6 Partial exploded view;

[0047] Figure 8 for Figure 7 Schematic diagram of the structure of the middle base;

[0048] Fig. 9 for Figure 8 Schematic diagram of the interior of the middle base;

[0049] Fig.10 for Figure 8 The structural diagram of the main circuit board;

[0050] Fig.11 for Figure 6 Position relationship diagram of the middle frame, carrier and bracket;

[0051] Fig.12 for Fig.11 Schematic diagram of the structure of the middle frame and carrier;

[0052] Fig.13 for Fig.12 Another angle diagram of the carrier;

[0053] Fig.14 for Fig.11 Connection diagram between the middle frame and the bracket;

[0054] Fig.15 for Fig.14 Schematic diagram of some structures;

[0055] Fig.16 Another structural schematic diagram of the present invention;

[0056] Fig.17 for Fig.16 Exploded diagram of

[0057] Fig.18 for Fig.17Further exploded diagram of;

[0058] Fig.19 for Fig.18 Schematic diagram of the structure of the middle base;

[0059] Fig. 20 for Fig.19 Schematic diagram of the interior of the middle base;

[0060] Fig.21 and Fig. 22 for Fig. 20 Schematic diagram from another angle. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0062] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0063] References throughout the specification to "one 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. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0064] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0065] In the following description, the concept of "optical axis" is introduced to indicate the propagation direction of light in an optical element. It is an abstract concept and does not refer to the existence of an axis in a physical sense. The direction along the optical axis is defined as the Z-axis direction, and the two directions perpendicular to the Z-axis direction are defined as the X-axis direction and the Y-axis direction.

[0066] Reference Figures 1 to 22The embodiment of the present invention provides a lens driving device, which includes a housing 1, a base 2, a driving mechanism and a lens. The housing 1 and the base 2 form a hollow cavity. The driving mechanism and the lens are located in the hollow cavity. The driving mechanism drives the lens to perform anti-shake and zoom actions. The middle part of the lens driving device is provided with an axially connected lens through hole along the optical axis direction to accommodate the lens and transmit light.

[0067] Reference Fig. 9 , Figure 20 to Figure 22 , the base 2 is built with a circuit built-in metal 21 and a connection built-in metal. The circuit built-in metal 21 is connected to the external circuit outside the base 2, and the components that need to be energized in the hollow cavity can be connected and energized through the circuit built-in metal 21. A fixed protrusion 22 is arranged on the outside of the connection built-in metal, and the fixed protrusion 22 extends out of the outer peripheral side wall of the base 2. The shell 1 is a metal shell, and the bottom edge of the shell 1 is fixedly connected to the fixed protrusion 22 to realize the connection between the shell 1 and the base 2. The existing base and the shell are usually connected in a snap-fit ​​manner, while the base and the shell of the present invention are fixedly connected by fixed protrusions to achieve a stable buckle between the metal shell and the base.

[0068] The connected built-in metal includes a negative circuit board 23, that is, a fixed bump 22 for fixed connection with the housing 1 is arranged on the outside of the negative circuit board 23. A grounding pin 231 is arranged on the negative circuit board 23, and the grounding pin 231 is connected to the negative pole or ground wire of the external circuit outside the base 2. Due to the design of the grounding pin 231, it is connected to the negative pole or ground wire of the external circuit to achieve the grounding of the housing, so as to prevent the housing from carrying current or accidentally touching other components to generate current and affect the inside of the lens driving device.

[0069] In one embodiment, referring to Fig. 9 , Fig.21 and Fig. 22 , the connected built-in metal also includes at least one reinforced built-in plate 24. That is to say, a fixed protrusion 22 for fixedly connecting with the housing 1 is also arranged on the outside of the reinforced built-in plate 24.

[0070] A reinforcing built-in plate 24 is added in the base 2 to ensure a more uniform and stable fixed connection with the housing 1 .

[0071] like Figure 20 to Figure 22 As shown, when the outer contour of the base 2 is a frame-like structure, two reinforced built-in plates 24 are respectively located on the adjacent two sides of the negative circuit board 23, and a side not connected to the built-in metal is used to lead out several pins of the circuit built-in metal 21.

[0072] In one embodiment, the fixing protrusions 22 are welding protrusions, and the bottom end of the housing 1 is connected to the fixing protrusions 22 by welding.

[0073] In one embodiment, the surface of the ground pin 231 has a plating layer.

[0074] In one embodiment, the connection built-in metal and the circuit built-in metal 21 are arranged in the same plane in the base 2. In this case, the base 2 is wider and thinner.

[0075] In one embodiment, the connection built-in metal and the circuit built-in metal 21 are layered in the base 2. In this case, the width of the base 2 can be reduced, but the thickness of the base 2 will be increased.

[0076] The layered arrangement in this embodiment refers to layering in the optical axis direction, so the thickness of the base 2 in the optical axis direction will increase.

[0077] In one embodiment, when the connected built-in metal includes a negative circuit board 23 and a reinforced built-in board 24, the negative circuit board 23 and the reinforced built-in board 24 can both maintain the same plane or be layered with the circuit built-in metal 21, or one of them can maintain the same plane with the circuit built-in metal 21 and the other can be layered with the circuit built-in metal 21.

[0078] In one embodiment, referring to Figure 1 and Figure 2 A prism 3 is disposed at the bottom of the base 2. The prism 3 is not connected to the base 2. The prism 3 and the base 2 are mounted on the motor camera module together. The prism 3 has two oppositely disposed reflection surfaces, namely a first reflection surface 31 and a second reflection surface 32. Both reflection surfaces intersect with the optical axis direction. Figure 2 As shown, the two reflection surfaces are symmetrical with the optical axis direction, that is, the Z axis as the symmetry axis. The first reflection surface 31 is located below the lens, and the second reflection surface 32 extends out of the base avoidance notch 25 on one side of the base 2.

[0079] In this embodiment, a prism design is adopted. After light enters the lens, it is deflected by the first reflection surface 31 to the second reflection surface 32, and then deflected out from the second reflection surface 32, so that the light is turned 180 degrees and enters the image chip on the motor camera module to achieve an imaging effect. This design can reduce the overall thickness of the camera, making electronic devices such as mobile phones thinner.

[0080] In one embodiment, the driving mechanism includes a first driving mechanism and a second driving mechanism. Figures 1 to 5 The lens includes a first lens 41 and a second lens 42 which are coaxially arranged.

[0081] The lens driving device also includes a frame 5 and a carrier 6, the frame 5 and the carrier 6 are located in the hollow cavity, the carrier 6 is installed in the frame 5 and is movably connected to the frame 5, the first lens 41 is fixed on the frame 5, and the second lens 42 is fixed on the carrier 6. The frame 5, together with the carrier 6, the first lens 41 and the second lens 42, are driven by the first driving mechanism to move in the X-axis direction and the Y-axis direction in the hollow cavity to achieve the anti-shake function. The carrier 6 and the second lens 42 are driven by the second driving mechanism to move in the Z-axis direction relative to the frame 5 to achieve the zoom function. Since the second lens 42 moves in the Z-axis direction, the distance between the second lens 42 and the first lens 41 is changed, thereby achieving the adjustment effect of the focused light. Under the action of the first driving mechanism and the second driving mechanism, the second lens 42 realizes a three-axis movement operation.

[0082] In this embodiment, the first lens 41 is a fixed structure lens, and the second lens 42 is a zoom lens (also called AF lens) installed on the carrier of the OIS anti-shake motor. The AF lens can perform anti-shake and zoom actions in the OIS anti-shake motor. Among them, the first lens 41 is arranged on the upper end of the second lens 42 and the two are arranged coaxially. After the second lens 42 moves in the AF direction, the distance between the second lens 42 and the first lens 41 changes, thereby achieving the effect of adjusting the focused light.

[0083] In another embodiment, referring to Figures 16 to 18 , only one lens is provided, that is, the zoom lens installed on the carrier in the traditional OIS anti-shake motor, and the zoom lens is installed on the carrier 6. The first driving mechanism drives the frame 5 together with the carrier 6 and the zoom lens to move in the X-axis direction and the Y-axis direction in the hollow cavity to realize the anti-shake function. The second driving mechanism drives the carrier 6 and the zoom lens to move in the Z-axis direction relative to the frame 5 to realize the zoom function. Under the action of the first driving mechanism and the second driving mechanism, the zoom lens realizes a three-axis movement operation.

[0084] In one embodiment, referring to Figure 7 The first driving mechanism includes an OIS coil arranged in a driving circuit board 71 and a driving magnet 72 arranged on the frame 5. The OIS coil and the driving magnet 72 are arranged opposite to each other. Under the cooperation of the OIS coil and the driving magnet 72, the driving frame 5 together with the driving magnet 72 and the carrier 6 will move in the X-axis and Y-axis directions in the hollow cavity.

[0085] When the lens includes a first lens and a second lens, when the frame 5 moves, the first lens and the second lens can move along with the frame 5 in the X-axis and Y-axis directions.

[0086] When there is only one zoom lens and it is mounted on the carrier 6 , when the frame 5 moves, the zoom lens can move along the X-axis and Y-axis directions with the frame 5 .

[0087] In one embodiment, there are two OIS coils and two driving magnets 72 , and the two driving magnets 72 are preferably disposed on adjacent sides.

[0088] In one embodiment, a magnet mounting groove is provided on the frame 5 for mounting the driving magnet 72 .

[0089] In one embodiment, the driving circuit board 71 is a PPC board.

[0090] In one embodiment, referring to Figure 7 A main circuit board 73 is disposed at the upper end of the base 2, and a driving circuit board 71 is disposed at the upper end of the main circuit board 73. The main circuit board 73 is electrically connected to the OIS coil in the driving circuit board 71. The main circuit board 73 is powered by an external circuit outside the base 2 and supplies power to the OIS coil on the driving circuit board 71.

[0091] In one embodiment, referring to Fig.10 A control chip 731 is arranged on the inner wall of the main circuit board 73, and a plurality of position sensors 732 and a storage chip 733 are arranged at the bottom of the main circuit board 73. The control chip 731 is electrically connected to the position sensor 732, the storage chip 733, and the OIS coil respectively. A position sensor 732 is arranged relative to a corresponding driving magnet 72 to realize position monitoring in the OIS direction.

[0092] When implementing it, refer to Figure 8 A chip mounting groove 7311 is provided on the side wall of the base 2, and a sensor avoidance groove 7321 and a storage chip avoidance groove 7331 are provided on the upper end of the base 2 to perform avoidance operations on the control chip 731, the position sensor 732, and the storage chip 733.

[0093] In another embodiment, referring to Fig.18 The main circuit board 73 on the base 2 is combined with the driving circuit board 71, that is, the OIS coil is directly arranged inside the driving circuit board 71, and the driving circuit board 71 is powered by the external circuit outside the base 2 and supplies power to the OIS coil. The driving circuit board 71 is provided with a control chip 731, a position sensor 732 and a storage chip 733.

[0094] In one embodiment, two position sensors 732 are disposed at the bottom end of the main circuit board 73 , and the two position sensors 732 are respectively located on two sides of the main circuit board 73 .

[0095] In one embodiment, referring to Figure 7 and Fig.12The second driving mechanism includes an AF coil 74 arranged on the outside of the carrier 6 and a driving magnet 72 arranged on the frame 5. The AF coil 74 and the driving magnet 72 are arranged opposite to each other. Under the cooperation of the AF coil 74 and the driving magnet 72, the carrier 6 is driven to move in the Z-axis direction relative to the frame 5.

[0096] The second lens or zoom lens is installed in the carrier 6, so that the second lens or zoom lens can move in the Z-axis direction.

[0097] When both the first driving mechanism and the second driving mechanism require magnets for driving motion, the first driving mechanism and the second driving mechanism share part of the driving magnets 72 .

[0098] For example, there are two AF coils 74 on the outside of the carrier 6, and the two AF coils 74 are arranged opposite to each other, and the frame 5 has two driving magnets 72 arranged opposite to each other and correspondingly cooperate with the two AF coils 74. At this time, when the first driving mechanism also has two driving magnets 72 and correspondingly cooperates with the two OIS coils, three driving magnets 72 are arranged on the frame 5, and the first driving mechanism and the second driving mechanism share the driving magnet 72 located on the left side.

[0099] In one embodiment, a magnet mounting groove is provided on the frame 5 for mounting the driving magnet 72 .

[0100] In one embodiment, referring to Figures 7 to 9 The lens driving device also includes an upper spring piece 75, a lower spring piece 76 and a power rod 77. The upper spring piece 75 is connected between the top of the frame 5 and the top of the carrier 6, and the lower spring piece 76 is connected between the bottom of the frame 5 and the bottom of the carrier 6. The power rod 77 is arranged at the four corners of the base 2 and supports the frame 5 and the carrier 6 in the hollow cavity. The lower end of the power rod 77 is electrically connected to the circuit built-in metal 21, the upper end of the power rod 77 is electrically connected to the upper spring piece 75, and the upper spring piece 75 is electrically connected to the AF coil 74.

[0101] The upper spring piece 75 and the lower spring piece 76 are used for the reset operation of the carrier 6. At the same time, the upper spring piece 75 is also used to connect the power rod 77 with the carrier 6 and transmit current. The upper spring piece 75 is connected to the base 2 through the power rod 77. The four power rods 77 fully support the frame 5 and the carrier 6, so that the frame 5 and the carrier 6 are in a suspended state to reduce the friction during OIS driving. At the same time, after OIS is driven, the elastic effect of the power rod 77 can have a certain reset effect. During the driving operation, the current on the base 2 is transmitted to the power rod 77, and the power rod 77 transmits the current to the upper spring piece 75, and then transmits the current to the AF coil 74 on the periphery of the carrier 6 through the upper spring piece 75 and supplies power, thereby realizing the power supply operation of the AF coil.

[0102] In one embodiment, referring to Fig.12 and Fig.13The carrier 6 is located on the inner side of the frame 5 , a protruding plate 61 is provided at one end of the carrier 6 , a sensing chip 78 is mounted on the protruding plate 61 , a sensing capacitor 791 is mounted at the bottom of the sensing chip 78 , and the sensing chip 78 is powered by the upper spring sheet 75 through the carrier built-in circuit in the carrier 6 .

[0103] An induction magnet 792 is disposed at the top of one side of the frame 5, and the induction magnet 792 and the induction capacitor 791 are disposed opposite to each other to realize position monitoring in the zoom direction.

[0104] In one embodiment, an induction magnet groove is provided at the top of one side of the frame 5 and accommodates the induction magnet 792 .

[0105] In one embodiment, referring to Fig.15 An induction magnet support portion 51 is provided on one side of the bottom end of the frame 5. The induction magnet support portion 51 is provided at the bottom end of the induction magnet 792 and adsorbed with the induction magnet 792 to improve the installation stability of the induction magnet 792.

[0106] In one embodiment, referring to Figures 5 to 7 , Fig.11 and Fig.14 The lens driving device also includes a bracket 8, which is fixed to the top of the frame 5. The first lens 41 is fixed to the bracket 8, and the first lens 41 is preferably located at the center of the bracket 8.

[0107] In one embodiment, a top end of the first lens 41 extends out from a top end of the housing 1 .

[0108] In one embodiment, one of the bracket 8 and the frame 5 is provided with a connecting column and the other is provided with a connecting hole, and the connecting column is connected to the connecting hole.

[0109] Reference Fig.14 and Fig.15 The bracket 8 is provided with a connecting hole 81 , and the frame 5 is provided with a connecting column 52 , which is connected to the connecting hole 81 .

[0110] In one embodiment, the connecting column is a riveted column, and the connecting column and the connecting hole are connected by riveting.

[0111] In one embodiment, referring to Fig.15 A frame built-in metal 53 is provided in the frame 5, a bracket built-in metal 82 is provided in the bracket 8, and the frame built-in metal 53 is fixedly connected to the bracket built-in metal 82.

[0112] In one embodiment, the bracket built-in metal 82 is connected to the frame built-in metal 53 by welding.

[0113] In one embodiment, one of the bracket 8 and the frame 5 is provided with a connection column and the other is provided with a connection hole, the frame 5 is provided with a frame built-in metal 53, and the bracket 8 is provided with a bracket built-in metal 82. The bracket 8 and the frame 5 are first connected through the connection column and the connection hole, and then connected through the frame built-in metal 82 and the frame built-in metal 53 to improve the connection stability.

[0114] In one embodiment, referring to Fig.15 A plurality of bracket support parts 54 are provided on the frame built-in metal 53 , and the frame built-in metal 53 and the bracket built-in metal 82 are fixedly connected by the bracket support parts 54 and the bracket built-in metal 82 .

[0115] Several bracket support parts 54 can be distributed at different positions of the frame built-in metal 53. Multiple bracket support parts 54 can not only achieve welding with the bracket built-in metal 82, but also enhance the supporting strength of the frame 5 to the bracket 8.

[0116] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A lens driving device, comprising a housing, a base, a driving mechanism and a lens, wherein the housing and the base form a hollow cavity, the driving mechanism and the lens are located in the hollow cavity, and the driving mechanism drives the lens to perform anti-shake action and zoom action; It is characterized in that The base is provided with a circuit built-in metal and a connection built-in metal, the circuit built-in metal is connected to an external circuit outside the base, a fixed protrusion is arranged on the outer side of the connection built-in metal, the fixed protrusion extends out of the outer peripheral side wall of the base, the shell is a metal shell, and the bottom end of the shell is fixedly connected to the fixed protrusion to realize the connection between the shell and the base; The connecting built-in metal comprises a negative circuit board, a ground pin is arranged on the negative circuit board, and the ground pin is connected to the negative pole or ground wire of the external circuit outside the base.

2. The lens driving device according to claim 1, wherein: The connecting built-in metal further comprises at least one reinforcing built-in plate; And / or, the fixing protrusion is a welding protrusion, and the bottom end of the housing is connected to the fixing protrusion by welding; And / or, the surface of the ground pin has a plating layer.

3. The lens driving device according to claim 1, wherein: The connection built-in metal and the circuit built-in metal are arranged in the same plane or in layers in the base.

4. The lens driving device according to claim 1, wherein: A prism is arranged at the bottom end of the base, and the prism has two oppositely arranged reflective surfaces, namely a first reflective surface and a second reflective surface. The two reflective surfaces intersect with the optical axis direction, the first reflective surface is located below the lens, and the second reflective surface extends out of the base avoidance notch on one side of the base.

5. The lens driving device according to claim 1, 2, 3 or 4, characterized in that: The driving mechanism includes a first driving mechanism and a second driving mechanism, and the lens includes two coaxially arranged first lenses and second lenses; the lens driving device also includes a frame and a carrier, the frame and the carrier are located in the hollow cavity, the carrier is installed in the frame and is movably connected to the frame, the first lens is fixed on the frame, and the second lens is fixed on the carrier, the first driving mechanism drives the frame to perform an anti-shake action in the hollow cavity, and the second driving mechanism drives the carrier and the second lens to perform a zoom action relative to the frame to change the distance between the second lens and the first lens; Alternatively, the driving mechanism includes a first driving mechanism and a second driving mechanism; the lens driving device also includes a frame and a carrier, the frame and the carrier are located in the hollow cavity, the carrier is installed in the frame and is movably connected to the frame, the lens is fixed on the carrier, the first driving mechanism drives the frame to perform an anti-shake action in the hollow cavity, and the second driving mechanism drives the carrier and the lens to perform a zoom action relative to the frame.

6. The lens driving device according to claim 5, characterized in that: The first driving mechanism includes an OIS coil disposed in a driving circuit board and a driving magnet disposed on the frame, wherein the OIS coil and the driving magnet are disposed opposite to each other, and the OIS coil and the driving magnet cooperate to drive the frame to perform an anti-shake action in the hollow cavity; Preferably, a main circuit board is arranged on the base, the driving circuit board is arranged on the upper end of the main circuit board, and the main circuit board is powered by an external circuit outside the base and supplies power to the OIS coil on the driving circuit board; More preferably, a control chip is arranged on the inner wall of the main circuit board, and a plurality of position sensors and storage chips are arranged at the bottom end of the main circuit board. The control chip is electrically connected to the position sensor, the storage chip and the OIS coil respectively, and one position sensor is arranged relative to a corresponding one of the magnets to realize position monitoring in the OIS direction.

7. The lens driving device according to claim 5, characterized in that: The second driving mechanism includes an AF coil disposed outside the carrier and a driving magnet disposed on the frame, wherein the AF coil and the driving magnet are disposed opposite to each other, and the carrier is driven to perform a zooming action relative to the frame under the cooperation of the AF coil and the driving magnet; Preferably, the lens driving device further comprises an upper spring sheet, a lower spring sheet and a power-on rod, the upper spring sheet is connected between the top end of the frame and the top end of the carrier, the lower spring sheet is connected between the bottom end of the frame and the bottom end of the carrier, the power-on rod is arranged at the four corners of the base and suspends the frame and the carrier in the hollow cavity, the lower end of the power-on rod is electrically connected to the built-in metal of the circuit, the upper end of the power-on rod is electrically connected to the upper spring sheet, and the upper spring sheet is electrically connected to the AF coil; More preferably, a protruding plate is provided at one end of the carrier, a sensing chip is mounted on the protruding plate, a sensing capacitor is mounted at the bottom of the sensing chip, and the sensing chip is powered by the upper spring sheet via a carrier built-in circuit in the carrier; a sensing magnet is provided at the top of one side of the frame, and the sensing magnet and the sensing capacitor are arranged opposite to each other to realize position monitoring in the zoom direction; More preferably, an induction magnet support portion is provided on one side of the bottom end of the frame, and the induction magnet support portion is provided at the bottom end of the induction magnet and adsorbed with the induction magnet.

8. The lens driving device according to claim 1, 2, 3 or 4, characterized in that: The driving mechanism includes a first driving mechanism and a second driving mechanism, and the lens includes two coaxially arranged first lenses and a second lens; The lens driving device further comprises a frame and a carrier, wherein the frame and the carrier are located in the hollow cavity, the carrier is installed in the frame and is movably connected to the frame, the first lens is fixed on the frame, and the second lens is fixed on the carrier, the frame is driven by the first driving mechanism to perform an anti-shake action in the hollow cavity, and the carrier and the second lens are driven by the second driving mechanism to perform a zoom action relative to the frame, thereby changing the distance between the second lens and the first lens; The lens driving device also includes a bracket, the bracket is fixed to the top of the frame, and the first lens is fixed on the bracket.

9. The lens driving device according to claim 8, wherein: The top of the first lens extends out from the top of the housing; And / or, one of the bracket and the frame is provided with a connecting column and the other is provided with a connecting hole, and the connecting column is connected to the connecting hole; Preferably, the connecting column is a riveted column, and the connecting column and the connecting hole are connected by riveting.

10. The lens driving device according to claim 8, wherein: The frame is provided with a frame built-in metal, the bracket is provided with a bracket built-in metal, and the frame built-in metal is fixedly connected to the bracket built-in metal; Preferably, the built-in metal of the bracket is connected to the built-in metal of the frame by welding; Preferably, a plurality of bracket support parts are arranged on the frame built-in metal, and the frame built-in metal and the bracket built-in metal are fixedly connected by the bracket support parts and the bracket built-in metal.

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