Lens driving device

Abstract

The present invention discloses a lens driving device, which includes a housing, a base, a first carrier, a second carrier, a first driving mechanism for driving the first carrier to move along the optical axis direction, and a second driving mechanism for driving the second carrier to move on a plane perpendicular to the optical axis. The first carrier, the second carrier, the first driving mechanism and the second driving mechanism are arranged in the space formed by the cooperation of the housing and the base. The housing is provided with a crystal lens mounting portion for mounting a crystal lens, the second carrier is provided with a lens mounting hole for mounting a lens. The first carrier squeezes the crystal lens during the movement along the optical axis direction to achieve zooming, and the second carrier moves on a plane perpendicular to the optical axis direction to achieve optical image stabilization. The lens driving device of the present invention can simultaneously achieve the functions of optical zoom and optical image stabilization, and its zoom function is realized by a crystal lens, with stable structure and reliable performance.

Description

Technical Field

[0001] The present invention relates to the field of imaging, and particularly to a lens driving device. Background Art

[0002] With the development of technology, many current electronic devices (such as smart phones or digital cameras) have the function of taking pictures or videos. The use of these electronic devices is becoming more and more common, and they are developing towards a convenient, thin and light design direction to provide users with more choices. However, currently, zooming is usually achieved by driving the lens to move by a carrier. Summary of the Invention

[0003] The object of the present invention is to provide a lens driving device to provide a brand-new zooming and optical image stabilization method.

[0004] To solve the above problems, according to one aspect of the present invention, there is provided a lens driving device, which includes a housing, a base, a first carrier, a second carrier, a first driving mechanism for driving the first carrier to move along the optical axis direction, and a second driving mechanism for driving the second carrier to move in a plane perpendicular to the optical axis. The first carrier, the second carrier, the first driving mechanism and the second driving mechanism are arranged in a space formed by the cooperation of the housing and the base. The housing is provided with a crystal lens mounting portion for mounting a crystal lens, the second carrier is provided with a lens mounting hole for mounting a lens, the first carrier squeezes the crystal lens during the movement along the optical axis direction to achieve zooming, and the second carrier moves in a plane perpendicular to the optical axis direction to achieve optical image stabilization.

[0005] In one embodiment, the base is provided with a plurality of positioning posts extending towards the top of the housing, the housing is sleeved outside the plurality of positioning posts, and the top end of the housing is provided with a crystal lens buckle for fixing the crystal lens.

[0006] In one embodiment, the lens driving device further includes a limiting frame, and the limiting frame is fixed on a limiting frame mounting post of the base and arranged on the outer periphery of the second carrier.

[0007] In one embodiment, the lens driving device further includes an upper spring piece, the upper spring piece includes an elastic member and an outer ring and an inner ring connected by the elastic member, and the first driving mechanism includes a first magnet group fixed to the housing and a first coil provided on the first carrier. The upper spring piece is connected to the inner wall of the top end of the housing and the end face of the top end of the first carrier through the outer ring and the inner ring respectively, so as to movably connect the housing and the first carrier.

[0008] In one embodiment, the lens driving device further includes a lower reed. The base is provided with a built-in circuit board. The lower reed is disposed between the bottom end of the first carrier and the base and electrically connects the built-in circuit board and the first coil.

[0009] In one embodiment, a lens holder is fixedly connected to the top end of the first carrier. When the first coil is energized, under the magnetic field of the first magnet group, the lens holder moves in the optical axis direction along with the first carrier, and the top end of the lens holder presses against the crystal lens to move, so as to realize the deformation and zoom of the crystal lens.

[0010] In one embodiment, the second driving mechanism includes a second magnet group, a metal sheet, a suspension wire, and a driving circuit board. The base is provided with a base built-in circuit board. The metal sheet is fixedly disposed at the four corners of the top end of the second carrier and is connected to the upper end of the suspension wire. The lower end of the suspension wire is electrically connected to the base built-in circuit board. The driving circuit board is disposed at the bottom of the second carrier and is provided with a second coil. The second magnet group is disposed on the base and is arranged at the bottom of the second coil and cooperates with the second coil to drive the second carrier to move in a plane perpendicular to the optical axis.

[0011] In one embodiment, the second driving mechanism further includes a position circuit board. The position circuit board is arranged above the driving circuit board and is provided with a position sensor. The position sensor cooperates with the second magnet group to detect the displacement of the second carrier.

[0012] In one embodiment, the second driving mechanism includes a second magnet group, a metal sheet, a suspension wire, a position circuit board, and a driving circuit board. The second carrier is disposed inside the bottom of the first carrier. The metal sheet is fixed at the four corners of the top end of the second carrier and is electrically connected to the top end of the suspension wire. The bottom end of the suspension wire is electrically connected to the base built-in circuit board. The metal sheet is connected to the position circuit board through the built-in metal connection piece of the second carrier. The position circuit board is provided with a position chip. The driving circuit board is arranged below the position circuit board, and both the driving circuit board and the position circuit board are fixedly connected to the bottom end of the second carrier. The driving circuit board is internally provided with a second coil. The second magnet group is disposed on the base and is located below the second coil.

[0013] In one embodiment, the base is provided with a magnet groove, and the second magnet group is disposed in the magnet groove.

[0014] In one embodiment, the position circuit board is provided with a first metal connection port and a second metal connection port, the drive circuit board is provided with a third metal connection port, the first metal connection port is connected to the bottom contact of the built-in metal sheet of the second carrier, and the second metal connection port is connected to the third metal connection port of the drive circuit board.

[0015] In one embodiment, first notches and second notches are respectively provided at the four corner ends of the position circuit board and the drive circuit board, and the position circuit board and the drive circuit board are fitted and connected inside the carrier legs of the second carrier through the cooperation of the first notches and the second notches.

[0016] In one embodiment, the position circuit board and the drive circuit board are overlapped and respectively provided with a first positioning groove and a second positioning groove for the positioning and installation of the position circuit board and the drive circuit board.

[0017] In one embodiment, the built-in circuit board of the base includes four power supply pins and two drive pins, the lower spring piece includes a first spring wire, a second spring wire, a third spring wire and a fourth spring wire, and both ends of the first spring wire, the second spring wire, the third spring wire and the fourth spring wire are connected to the first carrier and the base respectively. One ends of the first spring wire and the second spring wire connected to the base are respectively electrically connected to the two drive pins of the built-in circuit board of the base, so as to form a path with the first coil outside the first carrier. The four power supply pins are respectively electrically connected to the bottom ends of four suspension wires, the metal sheet is electrically connected to the top ends of the four suspension wires, and the metal sheet is also electrically connected to the position circuit board and the drive circuit board through the built-in metal sheet of the second carrier, so as to supply power to the position circuit board and the drive circuit board.

[0018] The lens driving device of the present invention can simultaneously realize the functions of optical zoom and optical anti-shake, and its zoom function is realized by a crystal lens, with stable structure and reliable performance. Description of the Drawings

[0019] Figure 1 and Figure 2 are different three-dimensional exploded views of the lens driving device according to an embodiment of the present invention.

[0020] Figure 3 is a cross-sectional view of the lens driving device according to an embodiment of the present invention.

[0021] Figure 4 and Figure 5 are respectively the front views of the position circuit board and the drive circuit board according to an embodiment of the present invention.

[0022] Figure 6 and Figure 7They are respectively the three-dimensional views of the lower spring piece and the base built-in circuit board of an embodiment of the present invention, wherein a suspension wire is connected to the base built-in circuit board.

[0023] Figure 8 It is the three-dimensional view of the housing of an embodiment of the present invention.

[0024] Figure 9 It is the bottom view of the housing of an embodiment of the present invention.

[0025] Figure 10 It is the three-dimensional view of the crystal lens of an embodiment of the present invention.

[0026] Figure 11 It shows the three-dimensional view of the assembly formed by mounting the lens bracket on the second carrier in an embodiment of the present invention.

[0027] Figure 12 It is the three-dimensional view of the first carrier of an embodiment of the present invention, which shows the upper surface of the first carrier.

[0028] Figure 13 It is another three-dimensional view of the first carrier of an embodiment of the present invention, which shows the lower surface of the first carrier.

[0029] Figure 14 - 15 They are different three-dimensional views of the second carrier of an embodiment of the present invention, which respectively show the upper surface and the lower surface of the second carrier.

[0030] Figure 16 - 17 They are different three-dimensional views of the base of an embodiment of the present invention, which respectively show the upper surface and the lower surface of the base. Detailed implementation manners

[0031] The following will describe in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present invention, but only to illustrate the essential spirit of the technical solution of the present invention.

[0032] In the following description, certain specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one of ordinary skill in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail so as not to unnecessarily obscure the description of the embodiments.

[0033] References to "one embodiment" or "an embodiment" in the course of this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0034] In the following description, for the purpose of clearly showing the structure and working mode of the present invention, many directional terms will be used for description. However, terms such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms and not as limiting terms.

[0035] Figure 1 and Figure 2 are different exploded perspective views of a lens driving device according to an embodiment of the present invention. Figure 3 is a cross-sectional view of a lens driving device according to an embodiment of the present invention. As Figure 1 - 3 shown, the lens driving device 100 includes a housing 10, a base 20, a first carrier 30, a second carrier 40, a first driving mechanism for driving the first carrier 30 to move along the optical axis direction, and a second driving mechanism for driving the second carrier 40 to move in a plane perpendicular to the optical axis. The first carrier 30, the second carrier 40, the first driving mechanism, and the second driving mechanism are disposed in a space formed by the cooperation of the housing 10 and the base 20. Among them, the housing 10 is provided with a crystal lens mounting portion for mounting a crystal lens 50, the second carrier 30 is provided with a lens mounting hole for mounting a lens 60. The first carrier 30 squeezes the crystal lens 50 during the movement along the optical axis direction to achieve the zoom function, and the second carrier 40 moves in a plane perpendicular to the optical axis direction to achieve the optical image stabilization function. Therefore, the lens driving device of the present invention can simultaneously achieve the optical zoom and optical image stabilization functions, and its zoom function is achieved by the crystal lens, with a stable structure and reliable performance.

[0036] It should be noted that the above-mentioned first driving mechanism can be an electromagnetic driving mechanism or a piezoelectric driving mechanism. In this article, the first driving mechanism and the second driving mechanism of an embodiment of the present invention are introduced by taking the electromagnetic driving mechanism as an example. Those skilled in the art need to understand that these embodiments are not intended to limit the scope of the first driving mechanism and the second driving mechanism of the present application. According to the actual situation, those skilled in the art can select other driving forms such as piezoelectric driving and shape memory alloy driving.

[0037] For the convenience of description, in this article, the optical axis direction is defined as the Z-axis in the three-dimensional space coordinate system. The first driving mechanism drives the carrier to move along the Z-axis direction to achieve the autofocus function, also known as the AF function. Two mutually perpendicular axes on the plane perpendicular to the Z-axis are defined as the X-axis and the Y-axis. The second driving mechanism drives the second carrier to move along the X-axis or Y-axis to achieve the optical image stabilization function, also known as the OIS function.

[0038] In one embodiment, referring to Figure 1 , the housing 10 is provided with a crystal lens buckle 13, and the base 20 is provided with a positioning post 213. The housing 10 is sleeved outside the positioning post 213 of the base 20. The crystal lens buckle 13 is connected to the top end of the housing 10. This structure omits the crystal lens carrier in the prior art, integrally forms the housing 10 and the crystal lens buckle 13, reduces the assembly process and has higher structural strength.

[0039] Optionally, referring to Figure 1 , a limiting frame 61 is arranged between the first carrier 30 and the second carrier 40. The limiting frame 61 is fixed on the limiting frame mounting post 22 of the base 20. The entire limiting frame 61 is in a rectangular ring shape and is arranged on the outer periphery of the second carrier 40. The setting of the limiting frame 61 has at least the following functions: First, it serves as the maximum distance limit for the second carrier 40 in the X-axis and Y-axis directions; Second, a stepped second carrier limiting protrusion 42 is arranged on the outer periphery of the second carrier 40. The second carrier limiting protrusion 42 is located below the limiting frame 61. After the limiting frame 61 cooperates with the second carrier limiting protrusion 42, it can limit the movement of the second carrier 40 in the Z-axis direction; Third, it serves as the lowest position limit for the first carrier 30 in the Z-axis direction to prevent the second carrier 40 from colliding with the first carrier 30.

[0040] In one embodiment, referring to Figure 1 - 3 , the lens driving device 100 further includes an upper spring piece 71. The upper spring piece 71 includes an elastic member 713 and an outer ring 711 and an inner ring 712 connected by the elastic member 713. The first driving mechanism includes a first magnet group 73 fixed to the inner side wall of the housing 10 and a first coil 74 arranged on the outer side wall of the first carrier 30. The upper spring piece 71 is connected to the inner wall of the top end of the housing and the end face of the top end of the first carrier 30 through the outer ring 711 and the inner ring 712 respectively, so as to movably connect the housing and the first carrier 30. The first magnet group 73 is arranged around the first coil 74. Optionally, the bottom end of the first magnet group 73 is supported by a first magnet support block 26 on the base 20.

[0041] In one embodiment, referring to Figure 1 - 3, the lens driving device 100 further includes a lower spring piece 72. The lower spring piece 72 is disposed between the bottom end of the first carrier 30 and the base 20 and electrically connects the built-in circuit board 28 of the base 20 to the first coil 74. The lower spring piece 72 not only plays a role in elastically resetting the first carrier 30 but also plays a role in power-on.

[0042] In one embodiment, referring to Figure 1 - 3 , a lens holder 55 is fixedly connected to the top end of the first carrier 30. When the first coil 74 is powered on, under the magnetic field of the first magnet group 73, the lens holder 55 moves in the Z-axis direction along with the first carrier 30. The top end of the lens holder 55 abuts against the edge of the crystal lens 50 to move, thereby realizing the deformation and zooming of the crystal lens.

[0043] In one embodiment, referring to Figure 2 - 3 , the second driving mechanism includes a second magnet group 81, a metal sheet 82, a suspension wire 83, a position circuit board 84, and a driving circuit board 85. Among them, the second carrier 40 is disposed inside the bottom of the first carrier 30. The metal sheet 82 is fixed at the four corners of the top end of the second carrier 40 and is connected to the top end of the suspension wire 83. The bottom end of the suspension wire 83 is connected to the built-in circuit board 28 of the base. The metal sheet 82 is connected to the position circuit board 84 through the built-in metal connecting piece of the second carrier 40. The position circuit board 84 is provided with a position chip 841. The driving circuit board 85 is arranged below the position circuit board 84, and both the driving circuit board 85 and the position circuit board 84 are fixedly connected to the bottom end of the second carrier 40. The driving circuit board 85 is internally provided with a second coil (not shown in the figure). The second magnet group 81 is disposed on the base 20 and is located below the second coil. Optionally, the second magnet group 81 is disposed in the magnet groove 27 of the base 20.

[0044] Figure 4 and Figure 5 are respectively the front views of the position circuit board and the driving circuit board of an embodiment of the present invention. As Figure 4 - 5 shown, in one embodiment, the position circuit board 84 is provided with a first metal connection port 841 and a second metal connection port 842. The driving circuit board 85 is provided with a third metal connection port 851. The first metal connection port 841 is used to connect to the bottom contact 442 of the built-in metal sheet of the second carrier 40. The second metal connection port 842 is used to connect to the third metal connection port 851 on the driving circuit board 85, thereby realizing the electrical connection of the circuit in sequence from the built-in metal sheet of the second carrier, the position circuit board 84, and the driving circuit board 85.

[0045] Optionally, referring to Figure 4 - 5 , the four end corners of the position circuit board 84 and the driving circuit board 85 are respectively provided with a first notch 843 and a second notch 852 and are fitted and connected to the inside of the carrier legs 47 of the second carrier 40 through the cooperation of the first notch 843 and the second notch 852.

[0046] Optionally, referring to Figure 4 - 5 , the position circuit board 84 and the drive circuit board 85 are overlapped and provided with a first positioning groove 844 and a second positioning groove 853 respectively, so as to facilitate the positioning and installation of the position circuit board 84 and the drive circuit board 85.

[0047] Referring to Figure 1 - 5 , during assembly and operation, the lens 60 is fixed in the lens mounting hole 41 of the second carrier 40. The external circuit is electrically connected to the suspension wire 83 through the built-in circuit board 28 of the base, and the position circuit board 84 and the drive circuit board 85 are powered through the metal sheet 82 and the built-in metal connection sheet of the second carrier 40 in sequence. After the second coil in the drive circuit board 85 is energized, it is driven by the second magnet group 81 to drive the second carrier 40 to drive the lens 60 to move in the X-axis and Y-axis directions, realizing the optical image stabilization function. At the same time, the position circuit board 84 and the drive circuit board 85 move together with the second carrier 40, and the position chip 841 on the position circuit board 84 plays a role in position sensing and positioning.

[0048] Figure 6 And Figure 7 are respectively the perspective views of the lower spring piece and the built-in circuit board of the base in an embodiment of the present invention, where the suspension wire is connected to the built-in circuit board of the base. As Figure 6 - 7 shown, in one embodiment, the built-in circuit board 28 of the base includes four power supply pins 281 and two drive pins 282. The lower spring piece 72 includes a first spring wire 721, a second spring wire 722, a third spring wire 723, and a fourth spring wire 724. The two ends of the first spring wire 721, the second spring wire 722, the third spring wire 723, and the fourth spring wire 724 are respectively connected to the first carrier 30 and the base 20. Among them, the ends of the first spring wire 721 and the second spring wire 722 connected to the base 20 are respectively electrically connected to the two drive pins 282 of the built-in circuit board 28 of the base, so as to form a path with the first coil 74 outside the first carrier 30. The four power supply pins 281 are respectively electrically connected to the bottom ends of the four suspension wires 83, and the metal sheet 82 is electrically connected to the top ends of the four suspension wires 83. The metal sheet 82 is also connected to the position circuit board 84 and the drive circuit board 85 through the built-in metal connection sheet of the second carrier 40, so as to supply power to the position circuit board 84 and the drive circuit board 85.

[0049] Next, referring to Figure 8 and Figure 9 to introduce the housing 10 of an embodiment of the present invention. Figure 8 is the perspective view of the housing in an embodiment of the present invention, Figure 9 is the bottom view of the housing in an embodiment of the present invention. As Figure 8 - 9As shown, the housing 10 includes an integrally formed rectangular frame 11 and a cylindrical portion 12. The rectangular frame 11 includes a top 111 and four side portions 112 that integrally extend downward from the outer edge of the top 111. The top 111 has a rectangular structure and forms a circular opening in the middle for mating with the lens. The diameter of the circular opening is equal to the outer diameter of the cylindrical portion 12. The cylindrical portion 12 is connected to the circular opening of the top 111 and, together with the four side portions 112 and the top 111, defines a space for mounting the first carrier 20, the second carrier 30, the first driving mechanism, and the second driving mechanism. The crystal lens 50 is directly mounted on the upper opening of the cylindrical portion 12.

[0050] In one embodiment, a plurality of first housing protrusions 121 are provided on the inner wall of the cylindrical portion 12. The plurality of housing protrusions 121 extend towards the center of the cylinder and sink a certain distance to form crystal lens catches 13. The crystal lens 50 is mounted on the plurality of housing protrusions 121.

[0051] In one embodiment, a second housing protrusion 122 is provided between every two first housing protrusions 121. The second housing protrusion 122 extends a certain distance towards the center of the cylinder, and the length of the second housing protrusion 122 extending towards the center of the cylinder is shorter than the extension length of the first housing protrusion 121. When the crystal lens 50 is connected to the housing 10, the crystal lens 50 is mounted on the top end of the cylindrical portion 12. Specifically, the circular protrusion of the crystal lens 50 is fitted inside the second housing protrusion 122.

[0052] In one embodiment, a housing groove 123 is formed between the first housing protrusion 121 and the second housing protrusion 122. The housing groove 123 has an arc-shaped structure and mates with a corresponding portion on the crystal lens 50.

[0053] In one embodiment, sinking portions 113 are provided at the four corners of the top 111 of the rectangular frame 11 of the housing 10. Upper spring connection protrusions 114 are formed on the reverse side of the sinking portions 113. The upper spring connection protrusions 114 are connected to the outer ring 711 of the upper spring 71.

[0054] In one embodiment, one of the side portions 112 of the rectangular frame 11 of the housing 10 is provided with a protruding portion 115 that extends downward to cooperate with the base 20.

[0055] The following refers to Figure 10 Describe the crystal lens 50 of an embodiment of the present invention. Figure 10 is a perspective view of the crystal lens 50 of an embodiment of the present invention. As Figure 10As shown, the crystal lens 50 is fitted with the cylindrical portion 12 of the outer shell 10 and mounted on the cylindrical portion 12 of the outer shell 10. A lens groove 51 is provided at the outer peripheral edge of the crystal lens 50 to facilitate the installation operation by hand or a manipulator. A circular protrusion 52 is provided at the bottom end of the crystal lens 50, and a contact protrusion 53 is provided at the bottom end of the circular protrusion 52. A first lens protrusion 54 is provided on the outer periphery of the contact protrusion 53, and a second lens protrusion 56 is formed between every two lens grooves 51.

[0056] Figure 11 The perspective view of the assembly formed by mounting the lens holder 55 of an embodiment of the present invention on the second carrier 30 is shown, in combination with Figure 8 - 11 As shown, when the crystal lens 50 is connected to the outer shell 10, the crystal lens is installed inside the top end of the cylindrical portion 12, the circular protrusion 52 is fitted inside the second outer shell protrusion 122 of the outer shell 10, the contact protrusion 53 is in contact with the upper surface of the lens holder 55, the first outer shell protrusion 121 is located between the crystal lens 50 and the lens holder 55 to play a limiting role, and the first lens protrusion 54 corresponds and cooperates with the lens groove 551 provided on the lens holder 55.

[0057] Next, with reference to Figure 12 - 13 a description is given of the first carrier 30 of an embodiment of the present invention, wherein, Figure 12 is the perspective view of the first carrier 30 of an embodiment of the present invention, which shows the upper surface of the first carrier 30, Figure 13 is another perspective view of the first carrier 30 of an embodiment of the present invention, which shows the lower surface of the first carrier 30. As Figure 12 - 13 shown, the first carrier 30 includes an upper portion 31 and a lower portion 32. A hollow structure is formed inside the upper portion 31 and the lower portion 32 to cooperate with the lens and is preferably integrally formed. The upper portion 31 is formed in a cylindrical shape and has a shape matching the lens holder 55 to mount the lens holder 55. The outside of the lower portion 32 is formed in a rectangular block shape, and an upper spring inner ring mounting groove 321 is provided on the upper surface. The upper spring inner ring mounting groove 321 surrounds the upper portion 31 and is used for fixedly mounting the inner ring of the upper spring 71.

[0058] In one embodiment, a first carrier limiting portion 322 is provided on the bottom end wall of the first carrier 30, that is, the lower surface of the lower portion 32. The first carrier limiting portion 322 cooperates with the base first limiting portion on the base 20 to play a limiting role. Optionally, a lower spring mounting seat 323 is provided on the first carrier limiting portion 322, and a lower spring connecting column 324 is provided on the lower spring mounting seat 323 for mounting one end of the lower spring.

[0059] Optionally, a first carrier limiting part 322 is respectively arranged on each of the four side parts of the bottom end wall of the first carrier 30. A lower spring piece mounting seat 323 is arranged at the end of each carrier limiting part 322, and a coil connection terminal 325 is arranged on the outer side of two of the lower spring piece mounting seats 323. The coil connection terminal 325 is connected to the two end leads of the coil and is electrically connected to the adjacent lower spring piece mounting seat 323 through the lower spring piece.

[0060] Optionally, a first carrier limiting protrusion 326 is arranged on the inner side wall of the lower part 32 of the first carrier 30. The first carrier limiting protrusion 326 cooperates with the limiting frame to limit the first carrier 30 and prevent the first carrier 30 from colliding with the second carrier 40.

[0061] Optionally, a lens holder mounting post 311 is arranged on the top end face of the upper part 31 of the first carrier 30. The lens holder mounting post 311 cooperates with the mounting hole of the lens holder 55 to fixedly mount the lens holder 55 on the first carrier 30.

[0062] Next, refer to Figure 14 - 15 and describe the second carrier 40 of an embodiment of the present invention. As Figure 14 - 15 shown, a built-in metal sheet is arranged inside the second carrier 40 and forms a rectangular frame structure as a whole. A lens mounting hole 41 for cooperating with the lens is arranged in the middle of the second carrier 40. Four side parts are formed around the lens mounting hole 41. Metal sheet positioning protrusions 43 and top contacts 441 of the built-in metal sheet are arranged at the upper ends of the four side parts. The metal sheet positioning protrusions 43 are used for mounting the metal sheet. After the metal sheet is mounted, it contacts the top contacts 441 of the built-in metal sheet. Bottom contacts 442 of the built-in metal sheet are arranged at the bottom ends of the four side parts.

[0063] Optionally, first welding holes 451 for the built-in metal sheet are further arranged at the upper ends of the four side parts, and second welding holes 452 for the built-in metal sheet are arranged at the lower ends of the four side parts. The top contacts 441 of the built-in metal sheet correspond to the first welding holes 451 for the built-in metal sheet, and the second welding holes 452 for the built-in metal sheet correspond to the bottom contacts 442 of the built-in metal sheet. The first welding holes 451 for the built-in metal sheet and the second welding holes 452 for the built-in metal sheet are respectively used for the welding operation between the top contacts 441 of the built-in metal sheet and the metal sheet and the welding operation between the bottom contacts 442 of the built-in metal sheet and the position circuit board, and are simultaneously used for the positioning and mounting operation of the built-in metal sheet, and realize the energization operation of the suspension wire 83, the metal sheet 82, the built-in metal sheet and the position circuit board 84.

[0064] In an embodiment, second carrier limiting protrusions 42 are arranged on a pair of opposite side parts of the second carrier 40. Optionally, the first welding holes 441 for the built-in metal sheet are arranged on the limiting protrusions 42. The limiting protrusions 42 are used for cooperating with the limiting frame 61 to perform a limiting operation on the second carrier.

[0065] Optionally, a suspension wire avoidance groove 46 for avoiding the suspension wire 83 is provided at the edge end corner position of the second carrier 40, and the suspension wire 83 is disposed in the suspension wire avoidance groove 46.

[0066] Optionally, carrier feet 47 are further provided at the bottom end of the second carrier 40. The carrier feet 47 are used to support the second carrier 40, and the bottom ends of the carrier feet 47 are in contact with the upper surface of the base 20.

[0067] Optionally, a sinking portion 453 is provided on the upper surface of the second carrier limiting protrusion 42, and the limiting frame 61 is installed in the sinking portion 453.

[0068] Optionally, each side portion of the second carrier 40 is provided with a second carrier limiting protrusion 42, and a limiting groove 454 is provided on the lower surface of each second carrier limiting protrusion 42.

[0069] The following refers to Figure 16 - 17 to describe the base of an embodiment of the present invention. As Figure 16 - 17 shown, a base center opening 21 for cooperating with the lens is provided at the center of the base 20. Four base side portions and four base corner portions are formed around the base center opening 21. Lower reed mounting seats 21 are provided at the four base corner portions. Lower reed connection posts 211 are provided on the lower reed mounting seats 21. The lower reed connection posts 211 are used for mounting the other end of the lower reed.

[0070] Optionally, lower reed connection points 212 are provided on two lower reed mounting seats 21, which are in communication with the built-in circuit board of the base, so as to supply power to the coil on the first carrier through the lower reed; preferably, the lower reed connection points 212 are provided on the lower reed mounting seats 21 located on a pair of diagonals.

[0071] Optionally, limit posts 213 are further provided on the lower reed mounting seats 21. The limit posts 213 are integrally extended upward from the lower reed mounting seats 21 by a certain distance. The outer shell 10 is sleeved outside the limit posts 213, and the first carrier 30 is located inside the limit posts 213.

[0072] Optionally, only one lower reed connection post 211 is provided on the lower reed mounting seat 21 provided with the lower reed connection point 212, and the lower reed connection post 211 and the lower reed connection point 212 are respectively arranged on both sides of the limit post 213.

[0073] Optionally, limit frame mounting posts 22 are further provided on the upper surface of the base 20. Limit frame connection posts 221 are provided on the limit frame mounting posts 22 for mounting the limit frame.

[0074] Optionally, a plurality of metal sheet positioning holes 23 are further provided on the base 20 for the installation and positioning operation of the built-in circuit board of the base.

[0075] Optionally, the base 20 is further provided with four metal sheet positioning grooves 24 for positioning the built-in circuit board. At the same time, a suspension wire through hole 241 is provided in the metal sheet positioning groove 24 for the suspension wire to pass through.

[0076] Optionally, a lower metal block mounting groove 25 is further provided on the lower end surface of the base 20 for mounting the lower metal block located at the bottom end of the suspension wire.

[0077] Optionally, the base 20 is further provided with a first magnet support block 26 for supporting the Z-axis magnet.

[0078] Optionally, the base 20 is further provided with a base limit projection 261 for cooperating with the first carrier projection to perform the first carrier limiting operation.

[0079] Optionally, the base limit projection 261 is provided inside the first magnet support block 26 and has a height lower than that of the first magnet support block 26.

[0080] Optionally, the base 20 is further provided with a magnet groove 27 for placing the second magnet.

[0081] Optionally, installation avoidance grooves 271 are provided at both ends of the second magnet groove 27 to facilitate the installation operation of the second magnet by the manipulator.

[0082] In summary, the optical element driving device of the present invention has a broad commercial application scenario and can be widely applied to various electronic devices such as mobile phones and smart phones.

[0083] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings of the present invention, those skilled in the art can 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, characterized in that, The lens driving device includes a housing, a base, a first carrier, a second carrier, a first driving mechanism for driving the first carrier to move along the optical axis direction, and a second driving mechanism for driving the second carrier to move on a plane perpendicular to the optical axis, The first carrier, the second carrier, the first driving mechanism, and the second driving mechanism are arranged in the space formed by the cooperation of the housing and the base, where The housing is provided with a crystal lens mounting portion for mounting a crystal lens, the second carrier is provided with a lens mounting hole for mounting a lens, the first carrier squeezes the crystal lens during the movement along the optical axis direction to achieve zooming, and the second carrier moves on a plane perpendicular to the optical axis direction to achieve optical image stabilization; the lens driving device further includes a limiting frame, and the limiting frame is fixed on the limiting frame mounting posts of the base and arranged on the outer periphery of the second carrier; The limiting frame is used for limiting the maximum distance of the second carrier in the X-axis and Y-axis directions; A stepped second carrier limiting protrusion is provided on the outer periphery of the second carrier, and the second carrier limiting protrusion is located below the limiting frame. After the limiting frame cooperates with the second carrier limiting protrusion, the movement of the second carrier in the Z-axis direction can be restricted; The limiting frame serves as the lowest position limit of the first carrier in the Z-axis direction.

2. The lens driving device according to claim 1, wherein The base is provided with a plurality of positioning posts extending towards the top of the housing, the housing is sleeved outside the plurality of positioning posts, and the top end of the housing is provided with a crystal lens buckle for fixing the crystal lens.

3. The lens driving device according to claim 1, wherein The lens driving device further includes an upper spring piece, and the upper spring piece includes an elastic member and an outer ring and an inner ring connected by the elastic member, and The first driving mechanism includes a first magnet group fixed to the housing and a first coil provided on the first carrier. The upper spring piece is connected to the inner wall of the top end of the housing and the end face of the top end of the first carrier through the outer ring and the inner ring respectively, so as to movably connect the housing and the first carrier.

4. The lens driving device according to claim 3, wherein The lens driving device further includes a lower spring piece, the base is provided with a built-in circuit board, and the lower spring piece is arranged between the bottom end of the first carrier and the base and electrically connects the built-in circuit board and the first coil.

5. The lens driving device according to claim 3, characterized in that, A lens holder is fixedly connected to the top end of the first carrier. When the first coil is energized, under the magnetic field action of the first magnet group, the lens holder moves along the optical axis direction with the first carrier, and the top end of the lens holder presses against the crystal lens to move to achieve deformation zooming of the crystal lens.

6. The lens driving device according to claim 4, characterized in that The second driving mechanism includes a second magnet group, a metal sheet, a suspension wire, and a driving circuit board. The base is provided with a base built-in circuit board. The metal sheet is fixedly arranged at the four corners of the top end of the second carrier and connected to the upper end of the suspension wire. The lower end of the suspension wire is electrically connected to the base built-in circuit board. The driving circuit board is arranged at the bottom of the second carrier and is provided with a second coil. The second magnet group is arranged on the base and arranged at the bottom of the second coil and cooperates with the second coil to drive the second carrier to move on a plane perpendicular to the optical axis.

7. The lens driving device according to claim 6, characterized in that, The second driving mechanism further includes a position circuit board which is arranged above the driving circuit board and is provided with a position sensor. The position sensor cooperates with the second magnet group to detect the displacement of the second carrier.

8. The lens driving device according to claim 4, wherein The second driving mechanism includes a second magnet group, a metal sheet, a suspension wire, a position circuit board and a driving circuit board. The base is provided with a base built-in circuit board. The second carrier is arranged inside the bottom of the first carrier. The metal sheet is fixed at the four corners of the top end of the second carrier and is electrically connected to the top end of the suspension wire. The bottom end of the suspension wire is electrically connected to the base built-in circuit board. The metal sheet is connected to the position circuit board through the built-in metal connecting sheet of the second carrier. The position circuit board is provided with a position chip. The driving circuit board is arranged below the position circuit board, and both the driving circuit board and the position circuit board are fixedly connected to the bottom end of the second carrier. The driving circuit board is internally provided with a second coil. The second magnet group is arranged on the base and is located below the second coil.

9. The lens driving device according to claim 6, wherein The base is provided with a magnet groove, and the second magnet group is arranged in the magnet groove.

10. The lens driving device according to claim 7, characterized in that, The position circuit board is provided with a first metal connection port and a second metal connection port. The driving circuit board is provided with a third metal connection port. The first metal connection port is in contact connection with the bottom end contact of the built-in metal sheet of the second carrier, and the second metal connection port is connected to the third metal connection port of the driving circuit board.

11. The lens driving device according to claim 10, wherein The four end corners of the position circuit board and the driving circuit board are respectively provided with a first notch and a second notch, and are fitted and connected inside the carrier support legs of the second carrier through the cooperation of the first notch and the second notch.

12. The lens driving device according to claim 10, characterized in that, The position circuit board and the driving circuit board are overlapped and are respectively provided with a first positioning groove and a second positioning groove for the positioning and installation work of the position circuit board and the driving circuit board.

13. The lens driving device according to claim 7, wherein, The base built-in circuit board includes four power supply pins and two driving pins. The lower spring piece includes a first spring wire, a second spring wire, a third spring wire and a fourth spring wire. The two ends of the first spring wire, the second spring wire, the third spring wire and the fourth spring wire are respectively connected to the first carrier and the base. Among them, One ends of the first spring wire and the second spring wire connected to the base are respectively electrically connected to the two driving pins of the base built-in circuit board, so as to form a path with the first coil outside the first carrier. The four power supply pins are respectively electrically connected to the bottom ends of the four suspension wires. The metal sheet is electrically connected to the top ends of the four suspension wires. The metal sheet is also electrically connected to the position circuit board and the driving circuit board through the built-in metal sheet of the second carrier, so as to supply power to the position circuit board and the driving circuit board.

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