Lens driving device

Abstract

The utility model 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, a 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. According to the utility model, the base and the shell are fixedly connected through the fixed salient points, so that stable buckling between the metal shell and the base is realized. 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] This utility model belongs to the field of optical imaging equipment technology, and specifically relates to a lens driving device. Background Technology

[0002] With the development of technology, many electronic devices today (such as smartphones or digital cameras) have 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 convenient and thinner designs to provide users with more choices.

[0003] Some electronic devices with photographic or video recording capabilities are equipped with a lens drive mechanism to move optical components such as a lens, thereby achieving autofocus and optical image stabilization (OIS). Light can pass through the optical components to form an image on the photosensitive element.

[0004] With the widespread use of smartphones and other electronic devices, optimizing the lens drive mechanisms built into these devices to achieve more stable image stabilization, zoom, and image quality is a task that those skilled in the art need to actively consider. Utility Model Content

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

[0006] A lens driving device includes a housing, a base, a driving mechanism, and a lens. The housing and the base form a hollow cavity. The driving mechanism and the lens are located in the hollow cavity. The driving mechanism drives the lens to perform image stabilization and zoom actions.

[0007] The base has built-in circuit metal and connecting metal. The built-in circuit metal is connected to the external circuit outside the base. The connecting metal has a fixing protrusion on its outer side, which extends out of the outer peripheral sidewall of the base. The outer shell is a metal shell, and the bottom end of the outer shell is fixedly connected to the fixing protrusion to realize the connection between the outer shell and the base.

[0008] The built-in metal connection includes a negative circuit board, which has a grounding pin connected to the negative terminal or ground wire of an external circuit outside the base.

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

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

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

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

[0013] Optionally, the connecting built-in metal and the circuit built-in metal are arranged in layers within the base.

[0014] Optionally, a prism is provided at the bottom of the base. The prism has two opposing reflective surfaces, namely a first reflective surface and a second reflective surface. The two reflective surfaces intersect with the optical axis. The first reflective surface is located below the lens, and the second reflective surface extends out of a base clearance 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 further includes a frame and a carrier, which are located within the hollow cavity. The carrier is installed within 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 image stabilization within the hollow cavity, and the second driving mechanism drives the carrier and the second lens to perform zoom relative to the frame, thereby changing 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 further includes a frame and a carrier, which 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 image stabilization in the hollow cavity, and the second driving mechanism drives the carrier and the lens to perform zooming relative to the frame.

[0019] Optionally, the first driving mechanism includes an OIS coil disposed in a driving circuit board and a driving magnet disposed on the frame. The OIS coil and the driving magnet are disposed opposite to each other, and the frame is driven to perform anti-shake action in the hollow cavity under the cooperation of the OIS coil and the driving magnet.

[0020] Optionally, a main circuit board is provided on the base, and a drive circuit board is located on the 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 drive circuit board.

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

[0022] Optionally, the second driving mechanism includes an AF coil disposed on the outside of the carrier and a driving magnet disposed on the frame. The AF coil and the driving magnet are disposed opposite to each other, and the carrier is driven to perform a zoom operation relative to the frame under the cooperation of the AF coil and the driving magnet.

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

[0024] Optionally, a protruding plate is provided at one end of the carrier, a sensing chip is installed on the protruding plate, a sensing capacitor is installed at the bottom of the sensing chip, and the sensing chip is powered by the upper spring sheet through the carrier's built-in circuit.

[0025] A sensing magnet is installed at the top of one side of the frame. The sensing magnet and the sensing capacitor are positioned opposite each other to realize the position monitoring of the zoom direction.

[0026] Optionally, a magnetic support portion is provided on one side of the bottom end of the frame, and the magnetic support portion is disposed at the bottom end of the magnetic induction magnet and is attracted to the magnetic induction magnet.

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

[0028] Optionally, the tip of the first lens extends beyond the tip of the housing.

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

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

[0031] Optionally, the frame has a built-in frame metal, and the bracket has a built-in bracket metal, with the built-in frame metal and the built-in bracket metal being fixedly connected.

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

[0033] Optionally, the frame's built-in metal is provided with a plurality of bracket support parts, and the frame's built-in metal is fixedly connected to the bracket's built-in metal through the bracket support parts.

[0034] Beneficial effects: This utility model has at least one or more of the following advantages:

[0035] 1. The base and the outer shell of this utility model are fixedly connected by fixing protrusions. In particular, welding protrusions are used to weld the base to the bottom edge of the metal outer shell, achieving a stable fastening between the metal outer shell and the base. In addition, due to the design of the grounding pin, it is connected to the negative terminal or ground wire of the external circuit, realizing the grounding of the outer shell and preventing current carried on the outer shell or accidental contact with other components from causing current to affect the internal components of the lens drive device.

[0036] 2. The internal metal connector and the internal metal circuitry of this utility model can be flush or layered. When they are flush, i.e., kept on the same plane, the base width will increase while the thickness will be thinner. When they are layered, the base width can be reduced, but the base thickness will increase. In actual use, the choice can be made according to the needs of the scenario.

[0037] 3. This utility model uses a prism design so that after light enters the lens, it is deflected by the first reflective surface to the second reflective surface, and then deflected out by the second reflective surface, causing the light to turn 180 degrees before entering the image chip on the motor camera module to achieve the imaging effect. This design can reduce the overall thickness of the camera, allowing the electronic device to be thinner.

[0038] 4. The lens of this utility model consists of a first lens and a second lens set coaxially, realizing the adjustment effect of zoom and focus light, making the adjustment more convenient and faster, and having better image quality and better photo and video recording effects.

[0039] 5. The OIS coil of this utility model is powered by the main circuit board, and the AF coil is powered by the combined action of the built-in metal, the power-conducting rod and the upper spring, so that the OIS coil and the AF coil adopt a relatively independent power supply method. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of this utility model;

[0041] Figure 2 for Figure 1 Exploded view;

[0042] Figure 3 for Figure 1 Partial structural diagram;

[0043] Figure 4 for Figure 3 Top view;

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

[0045] Figure 6 for Figure 3 Exploded view;

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

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

[0048] Figure 9 for Figure 8 Internal diagram of the base;

[0049] Figure 10 for Figure 8 A schematic diagram of the main circuit board;

[0050] Figure 11 for Figure 6 Diagram showing the positional relationship between the midframe, carrier, and support structure;

[0051] Figure 12 for Figure 11 Schematic diagram of the structure of the mid-frame and carrier;

[0052] Figure 13 for Figure 12 Another perspective view of the medium carrier;

[0053] Figure 14 for Figure 11 Diagram showing the connection relationship between the middle frame and the support;

[0054] Figure 15 for Figure 14 Partial structural diagram;

[0055] Figure 16 This is another structural schematic diagram of the present invention;

[0056] Figure 17 for Figure 16 Exploded view;

[0057] Figure 18 for Figure 17 Further exploded view;

[0058] Figure 19 for Figure 18 Schematic diagram of the middle base;

[0059] Figure 20 for Figure 19 Internal diagram of the base;

[0060] Figure 21 and Figure 22 for Figure 20 Another perspective diagram. Detailed Implementation

[0061] 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.

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

[0063] 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.

[0064] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0065] In the following description, the concept of "optical axis" is introduced to represent the direction of light propagation within an optical element. It is an abstract concept and does not refer to the existence of a physical axis. 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 22 This utility model 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, and the driving mechanism and lens are located within the hollow cavity. The driving mechanism drives the lens to perform image stabilization and zoom operations. The lens driving device has an axially connected lens through-hole along the optical axis in its central part to accommodate the lens and transmit light.

[0067] Reference Figure 9 , Figures 20 to 22 The base 2 has a built-in circuit metal 21 and a connecting metal 21. The built-in circuit metal 21 is connected to an external circuit outside the base 2, allowing for the connection and energization of components within the hollow cavity. A fixing protrusion 22 is provided on the outer side of the connecting metal 2, extending from the outer periphery of the base 2. The outer shell 1 is a metal shell, and its bottom edge is fixedly connected to the fixing protrusion 22 to achieve the connection between the outer shell 1 and the base 2. Existing bases and shells typically use a snap-fit ​​connection, while the base and shell of this invention are fixedly connected by the fixing protrusion, achieving a stable fastening between the metal shell and the base.

[0068] The internal metal connection includes a negative electrode circuit board 23, meaning that a fixing protrusion 22 for fixed connection with the outer casing 1 is provided on the outside of the negative electrode circuit board 23. A grounding pin 231 is provided on the negative electrode circuit board 23, which is connected to the negative terminal or ground wire of an external circuit outside the base 2. Due to the design of the grounding pin 231, its connection to the negative terminal or ground wire of the external circuit achieves grounding of the outer casing, preventing current carried on the outer casing or accidental contact with other components from causing current to affect the internal components of the lens drive device.

[0069] In one embodiment, reference is made to Figure 9 , Figure 21 and Figure 22 The connecting internal metal also includes at least one reinforcing internal plate 24. That is, the outer side of the reinforcing internal plate 24 is also provided with fixing protrusions 22 for fixing to the outer shell 1.

[0070] By adding a reinforcing built-in plate 24 inside the base 2, a more uniform and stable fixed connection with the outer shell 1 is achieved.

[0071] like Figures 20 to 22 As shown, when the outer contour of the base 2 is a frame-like structure, the two reinforced built-in plates 24 are located on the adjacent sides of the negative circuit board 23, and the side without the built-in metal is used to lead out several pins of the built-in metal 21 of the circuit.

[0072] In one embodiment, the fixing protrusion 22 is a welding protrusion, and the bottom end of the outer shell 1 is connected to the fixing protrusion 22 by welding.

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

[0074] In one embodiment, the connecting built-in metal and the circuit built-in metal 21 are disposed on the same plane within the base 2. In this case, the width of the base 2 will be increased while its thickness will be thinner.

[0075] In one embodiment, the connecting built-in metal and the circuit built-in metal 21 are arranged in layers within 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] In this embodiment, the layering 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 connection of the built-in metal includes the negative circuit board 23 and the reinforcing built-in board 24, the negative circuit board 23 and the reinforcing built-in board 24 can both be arranged on the same plane or in layers with the built-in metal 21, or one of them can be arranged on the same plane with the built-in metal 21 and the other of them can be arranged in layers with the built-in metal 21.

[0078] In one embodiment, reference is made to Figure 1 and Figure 2 A prism 3 is mounted at the bottom of the base 2. The prism 3 is not connected to the base 2; instead, it is mounted together with the base 2 on the motor-mounted camera module. The prism 3 has two opposing reflective surfaces, a first reflective surface 31 and a second reflective surface 32. Both reflective surfaces intersect the optical axis. Figure 2 As shown, the two reflective surfaces are symmetrical about the optical axis, i.e., the Z-axis. The first reflective surface 31 is located below the lens, and the second reflective surface 32 extends out of the base clearance notch 25 on one side of the base 2.

[0079] In this embodiment, a prism design is used so that after light enters the lens, it is deflected by the first reflective surface 31 onto the second reflective surface 32, and then deflected out by the second reflective surface 32, causing the light to turn 180 degrees before entering the image chip on the motor camera module to achieve the imaging effect. This design can reduce the overall thickness of the camera, allowing electronic devices such as mobile phones to be thinner.

[0080] In one embodiment, the driving mechanism includes a first driving mechanism and a second driving mechanism, as shown in the figure. Figures 1 to 5 The lens includes two coaxially arranged lenses: a first lens 41 and a second lens 42.

[0081] The lens driving device also includes a frame 5 and a carrier 6, which are located within a hollow cavity. The carrier 6 is installed inside the frame 5 and movably connected to it. The first lens 41 is fixed to the frame 5, and the second lens 42 is fixed to the carrier 6. A first driving mechanism drives the frame 5, along with the carrier 6, the first lens 41, and the second lens 42, to move along the X and Y axes within the hollow cavity to achieve image stabilization. A second driving mechanism drives the carrier 6 and the second lens 42 to move relative to the frame 5 along the Z axis to achieve zoom functionality. Because the second lens 42 moves along the Z axis, the distance between the second lens 42 and the first lens 41 changes, thereby adjusting the focus. Under the action of the first and second driving mechanisms, the second lens 42 achieves three-axis movement.

[0082] In this embodiment, the first lens 41 is a fixed-structure lens, and the second lens 42 is a zoom lens (also known as an AF lens) mounted on the carrier of the OIS image stabilization motor. The AF lens can perform image stabilization and zoom operations within the OIS image stabilization motor. The first lens 41 is positioned above the second lens 42 and the two are coaxially aligned. When 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 focus of light.

[0083] In another embodiment, reference Figures 16 to 18 Only one lens is used, which is the zoom lens mounted on the carrier in a traditional OIS image stabilization motor. The zoom lens is mounted on carrier 6. The first drive mechanism drives frame 5, along with carrier 6 and zoom lens, to move in the X and Y axes within the hollow cavity to achieve image stabilization. The second drive mechanism drives carrier 6 and zoom lens to move relative to frame 5 in the Z axis to achieve zooming. Under the action of the first and second drive mechanisms, the zoom lens achieves three-axis movement.

[0084] In one embodiment, reference is made to Figure 7 The first driving mechanism includes an OIS coil disposed in the driving circuit board 71 and a driving magnet 72 disposed on the frame 5. The OIS coil and the driving magnet 72 are disposed opposite to each other. With 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 has a first lens and a second lens, the first lens and the second lens can move along with the frame 5 in the X-axis and Y-axis directions when the frame 5 moves.

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

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

[0088] In one embodiment, the frame 5 is provided with a magnet mounting slot for mounting a drive magnet 72.

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

[0090] In one embodiment, reference is made to Figure 7 A main circuit board 73 is mounted on the upper end of the base 2, and a drive circuit board 71 is mounted on the upper end of the main circuit board 73. The main circuit board 73 is electrically connected to the OIS coil inside the drive 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 drive circuit board 71.

[0091] In one embodiment, reference is made to Figure 10 A control chip 731 is provided on the inner wall of the main circuit board 73. Several position sensors 732 and storage chips 733 are provided at the bottom of the main circuit board 73. The control chip 731 is electrically connected to the position sensors 732, storage chips 733 and OIS coil respectively. One position sensor 732 is set opposite to a corresponding driving magnet 72 to realize position monitoring in the OIS direction.

[0092] In specific implementation, refer to Figure 8 The base 2 has a chip mounting slot 7311 on its side wall and a sensor clearance slot 7321 and a storage chip clearance slot 7331 on its upper end to allow clearance between the control chip 731, the position sensor 732, and the storage chip 733.

[0093] In another embodiment, reference Figure 18 The main circuit board 73 on the base 2 is integrated with the drive circuit board 71, meaning that the OIS coil is directly installed inside the drive circuit board 71. The drive circuit board 71 is powered by an external circuit outside the base 2 and supplies power to the OIS coil. The drive circuit board 71 is equipped with a control chip 731, a position sensor 732, and a storage chip 733.

[0094] In one embodiment, two position sensors 732 are provided at the bottom 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, reference is made to Figure 7 and Figure 12The second driving mechanism includes an AF coil 74 disposed on the outside of the carrier 6 and a driving magnet 72 disposed on the frame 5. The AF coil 74 and the driving magnet 72 are disposed opposite to each other. With the cooperation of the AF coil 74 and the driving magnet 72, the carrier 6 is driven to move relative to the frame 5 in the Z-axis direction.

[0096] The second lens or zoom lens is installed inside the carrier 6, thereby enabling the second lens or zoom lens to move in the Z-axis direction.

[0097] When both the first drive mechanism and the second drive mechanism require magnets to perform driving actions, the first drive mechanism and the second drive mechanism share a portion of the driving magnet 72.

[0098] For example, if there are two AF coils 74 on the outer side of the carrier 6, and the two AF coils 74 are arranged opposite each other, then there are corresponding two oppositely arranged driving magnets 72 on the frame 5 that cooperate with the two AF coils 74. At this time, when the first driving mechanism also has two driving magnets 72 that cooperate with the two OIS coils, the frame 5 is provided with three driving magnets 72, and the first driving mechanism and the second driving mechanism share the driving magnet 72 located on the left side.

[0099] In one embodiment, the frame 5 is provided with a magnet mounting slot for mounting a drive magnet 72.

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

[0101] The upper spring 75 and lower spring 76 are used for the reset operation of the carrier 6. The upper spring 75 also connects the energized rod 77 to the carrier 6 and transmits current. The upper spring 75 is connected to the base 2 via the energized rod 77. The four energized rods 77 completely support the frame 5 and the carrier 6, suspending them in mid-air to reduce friction during OIS actuation. Simultaneously, the elasticity of the energized rods 77 provides a certain degree of reset after OIS actuation. During the actuation operation, current from the base 2 is transmitted to the energized rods 77, which then transmit the current to the upper spring 75. The current is then transmitted via the upper spring 75 to the AF coil 74 on the outer periphery of the carrier 6, thus powering the AF coil.

[0102] In one embodiment, reference is made to Figure 12 and Figure 13The carrier 6 is located inside the frame 5. One end of the carrier 6 is provided with a protruding plate 61. A sensing chip 78 is installed on the protruding plate 61. A sensing capacitor 791 is installed at the bottom of the sensing chip 78. The sensing chip 78 is powered by the upper spring 75 through the carrier's built-in circuit inside the carrier 6.

[0103] A sensing magnet 792 is installed at the top of one side of the frame 5. The sensing magnet 792 and the sensing capacitor 791 are positioned opposite each other to realize the position monitoring of the zoom direction.

[0104] In one embodiment, a magnet groove is provided at the top of one side of the frame 5 and a magnet 792 is accommodated therein.

[0105] In one embodiment, reference is made to Figure 15 A magnetic support part 51 is provided on one side of the bottom end of the frame 5. The magnetic support part 51 is located at the bottom end of the magnetic 792 and is attracted to the magnetic 792, thereby improving the installation stability of the magnetic 792.

[0106] In one embodiment, reference is made to Figures 5 to 7 , Figure 11 and Figure 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 on the bracket 8, and the first lens 41 is preferably located at the center of the bracket 8.

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

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

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

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

[0111] In one embodiment, reference is made to Figure 15 The frame 5 has a frame-in-metal 53, and the bracket 8 has a bracket-in-metal 82. The frame-in-metal 53 and the bracket-in-metal 82 are fixedly connected.

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

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

[0114] In one embodiment, reference is made to Figure 15 The frame-in-metal 53 is provided with several bracket support parts 54, and the frame-in-metal 53 and the bracket-in-metal 82 are fixedly connected through the bracket support parts 54 and the bracket-in-metal 82.

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

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

Claims

1. A lens driving device, 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 within the hollow cavity, and the driving mechanism drives the lens to perform image stabilization and zoom actions; Its features are, The base has built-in circuit metal and connecting metal. The built-in circuit metal is connected to the external circuit outside the base. The connecting metal has a fixing protrusion on its outer side, which extends out of the outer peripheral sidewall of the base. The outer shell is a metal shell, and the bottom end of the outer shell is fixedly connected to the fixing protrusion to realize the connection between the outer shell and the base. The built-in metal connection includes a negative circuit board, which has a grounding pin connected to the negative terminal or ground wire of an external circuit outside the base.

2. The lens driving device as described in claim 1, characterized in that, The connecting built-in metal also includes at least one reinforcing built-in plate; And / or, the fixing protrusion is a welding protrusion, and the bottom end of the outer shell is connected to the fixing protrusion by welding; And / or, the surface of the grounding pin has a plating.

3. The lens driving device as described in claim 1, characterized in that, The connecting built-in metal and the circuit built-in metal are arranged on the same plane or in layers within the base.

4. The lens driving device as described in claim 1, characterized in that, A prism is provided at the bottom of the base. The prism has two opposing reflective surfaces, namely a first reflective surface and a second reflective surface. The two reflective surfaces intersect with the optical axis. The first reflective surface is located below the lens, and the second reflective surface extends out of a base clearance notch on one side of the base.

5. The lens driving device as described in claim 1, 2, 3 or 4, characterized in that, The driving mechanism includes a first driving mechanism and a second driving mechanism. 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 carrier 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 image stabilization in the hollow cavity, and the second driving mechanism drives the carrier and the second lens to perform zoom operation relative to the frame, thereby changing 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 further includes a frame and a carrier, the frame and carrier 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 image stabilization in the hollow cavity, and the second driving mechanism drives the carrier and the lens to perform zooming relative to the frame.

6. The lens driving device as described in claim 5, characterized in that, The first driving mechanism includes an OIS coil disposed in the driving circuit board and a driving magnet disposed on the frame. The OIS coil and the driving magnet are disposed 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.

7. The lens driving device as described in claim 6, characterized in that, The base is provided with a main circuit board, and the drive circuit board is located on the 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 drive circuit board.

8. The lens driving device as described in claim 7, characterized in that, A control chip is provided on the inner wall of the main circuit board, and several position sensors and storage chips are provided at the bottom of the main circuit board. The control chip is electrically connected to the position sensors, the storage chips, and the OIS coil respectively. One position sensor is arranged opposite to a corresponding magnet to realize position monitoring in the OIS direction.

9. The lens driving device as described in claim 5, characterized in that, The second driving mechanism includes an AF coil disposed on the outside of the carrier and a driving magnet disposed on the frame. The AF coil and the driving magnet are disposed opposite to each other, and the carrier is driven to perform a zoom operation relative to the frame under the cooperation of the AF coil and the driving magnet.

10. The lens driving device as claimed in claim 9, characterized in that, The lens driving device further includes an upper spring, a lower spring, and an energizing rod. The upper spring is connected between the top end of the frame and the top end of the carrier, and the lower spring is connected between the bottom end of the frame and the bottom end of the carrier. The energizing rod is located at the four corners of the base and suspends and supports the frame and the carrier in the hollow cavity. The lower end of the energizing rod is electrically connected to the built-in metal of the circuit, and the upper end of the energizing rod is electrically connected to the upper spring. The upper spring is electrically connected to the AF coil.

11. The lens driving device as claimed in claim 10, characterized in that, One end of the carrier is provided with a protruding plate, and a sensing chip is installed on the protruding plate. A sensing capacitor is installed at the bottom of the sensing chip. The sensing chip is powered by the upper spring sheet through the carrier's built-in circuit. A sensing magnet is provided at the top of one side of the frame. The sensing magnet and the sensing capacitor are arranged opposite to each other to realize the position monitoring of the zoom direction.

12. The lens driving device as claimed in claim 11, characterized in that, A magnetic support is provided on one side of the bottom end of the frame. The magnetic support is located at the bottom end of the magnetic induction stone and is attracted to the magnetic induction stone.

13. The lens driving device as described in claim 1, 2, 3 or 4, characterized in that, The drive mechanism includes a first drive mechanism and a second drive mechanism, and the lens includes two coaxially arranged first lenses and second lenses. The lens driving device further includes a frame and a carrier, which 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 image stabilization in the hollow cavity, and the second driving mechanism drives the carrier and the second lens to perform zoom operation relative to the frame, thereby changing the distance between the second lens and the first lens. The lens driving device also includes a bracket, which is fixed to the top of the frame, and the first lens is fixed to the bracket.

14. The lens driving device as claimed in claim 13, characterized in that, The tip of the first lens extends beyond the tip of the housing; And / or, one of the bracket and the frame is provided with a connecting post and the other is provided with a connecting hole, and the connecting post is connected to the connecting hole.

15. The lens driving device as claimed in claim 14, characterized in that, The connecting post is a riveted post, and the connecting post and the connecting hole are connected by riveting.

16. The lens driving device as claimed in claim 13, characterized in that, The frame has a built-in metal, and the bracket has a built-in metal; the built-in metal of the frame and the built-in metal of the bracket are fixedly connected.

17. The lens driving device as claimed in claim 16, characterized in that, The built-in metal of the bracket is welded to the built-in metal of the frame.

18. The lens driving device as claimed in claim 16, characterized in that, The frame has a plurality of bracket support parts on its built-in metal, and the frame's built-in metal is fixedly connected to the bracket's built-in metal through the bracket support parts.

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