Lens driving device

Abstract

The present invention belongs to the technical field of optical imaging devices, and particularly relates to a lens driving device. A lens driving device includes a housing, a base, a driving assembly, and a carrier. There is a hollow cavity between the housing and the base, and the driving assembly is arranged in the hollow cavity. The driving assembly includes an OIS coil group, a magnet group, and an AF coil; the OIS coil group is arranged on the base, and the AF coil is arranged on the outer side of the carrier; the lens driving device further includes: a frame arranged on the base and capable of moving in the X-axis and Y-axis directions on the base. A magnet group is fixed on the frame, and the carrier is sleeved inside the frame, and the carrier can move in the Z-axis direction inside the frame; an upper spring piece is located above the base, the frame, and the carrier, and is respectively connected to the base, the frame, and the carrier. Through the compact design of the housing, the base, and the driving assembly, the present invention makes the axial thickness of the lens driving device smaller on the premise of realizing better three-axis movement operation of the lens, and is suitable for the thin and light design of electronic products.

Description

Technical Field

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

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

[0003] Some electronic devices with the functions of taking pictures or videos are provided with a lens driving device to drive an optical component such as a lens to move, so as to achieve functions such as autofocus and optical image stabilization (OIS). Light can pass through the optical component to form an image on the photosensitive component.

[0004] Existing lens driving devices generally include an OIS coil group, a magnet group, an AF coil for preventing lens shake, and a carrier for mounting the lens. However, the lens driving device is generally complex in design. Especially the cooperative design of the coil group and the magnet group is usually in a stacked state axially. Not only is the overall assembly complex, but also the thickness in the axial direction is relatively thick, affecting the overall thickness of the electronic product and being not conducive to the thin and light design of the electronic product.

[0005] In addition, the lens driving device usually can only adopt an open-loop driving method. Since the open-loop driving cannot sense the actual position, there may be a risk of poor control effect when the environment and structural characteristics change. Therefore, how to achieve closed-loop driving is the key to the implementation of the lens driving device technology. Summary of the Invention

[0006] The present invention aims to provide a lens driving device for the above technical problems.

[0007] A lens driving device includes a housing, a base, a driving component and a carrier. There is a hollow cavity between the housing and the base. The driving component is arranged in the hollow cavity. The driving component includes an OIS coil group, a magnet group and an AF coil;

[0008] The OIS coil group is arranged on the base, and the AF coil is arranged outside the carrier;

[0009] The lens driving device further includes:

[0010] A frame is arranged on the base and can move in the X-axis and Y-axis directions on the base. The magnet group is fixed on the frame. The carrier is sleeved inside the frame, and the carrier can move in the Z-axis direction inside the frame.

[0011] An upper spring piece is located above the base, the frame and the carrier, and is respectively connected to the base, the frame and the carrier;

[0012] Support protrusions are provided at four corner positions of the base, an internal circuit is provided in the support protrusions, and the top of the support protrusions is connected to the top of the frame through the upper spring piece, and the internal circuit is connected to the AF coil through the upper spring piece.

[0013] Through the above compact design of the present invention, under the action of the OIS coil group and the magnet group, the frame together with the magnet group and the carrier will move in the X-axis and Y-axis directions in the hollow cavity, and under the action of the AF coil and the magnet group, the carrier will move in the Z-axis direction relative to the frame. Since the lens is mounted in the carrier, the three-axis movement operation of the lens is realized. Also, due to the structural design of the upper spring piece, it is connected to the base, the frame and the carrier at the same time. Under the elastic action of the upper spring piece, when the frame moves in the X-axis and Y-axis directions relative to the base or the carrier moves in the Z-axis direction relative to the frame, the upper spring piece can play an auxiliary reset effect.

[0014] The present invention provides support protrusions with internal circuits at four corner positions of the base, and all pin leads can be led out from the base, and connection relationships are established with other modules or devices not provided on the base through the upper spring piece, so that the overall layout of the lens driving device is reasonable and simple.

[0015] The lens driving device further includes:

[0016] A lower spring piece is located between the bottom end of the frame and the bottom end of the carrier, and is respectively connected to the frame and the carrier. The lower spring piece can play an auxiliary reset role after the carrier moves in the Z-axis direction relative to the frame.

[0017] The housing and the base are snap-connected to form the hollow cavity.

[0018] A magnet mounting groove is provided on the inner side of the bottom end of the frame, and the magnets in the magnet group are fixed in the magnet mounting groove.

[0019] A conductive coating is provided on the outer side of the magnet to achieve a better conductive effect.

[0020] A number of base ball grooves are provided on the base, corresponding frame ball grooves are provided at the bottom end of the frame, one of the frame ball grooves is arranged above a corresponding one of the base ball grooves, and balls are arranged in the groove cavity formed between the frame ball groove and the corresponding base ball groove. After the above design, the friction between the frame and the base can be reduced when the frame moves in the X-axis and Y-axis directions.

[0021] Built-in adsorption iron sheets are embedded inside the four end corners of the base. A certain attraction force is generated between the built-in adsorption iron sheets and the magnets. This attraction force causes the frame to closely adhere to the base, making its structure more compact. At the same time, it ensures that the balls can contact the ball grooves of the base and the ball grooves of the frame, ensuring the use effect of the balls.

[0022] The frame has a built-in metal structure inside the frame. The built-in metal structure inside the frame is connected to the magnet, and the magnet is connected to the upper spring piece through the built-in metal structure inside the frame.

[0023] The built-in circuit includes a coil circuit. The coil circuit includes:

[0024] A number of OIS coil pins are respectively connected to the OIS coils in the OIS coil group;

[0025] Two AF coil pins respectively extend out of the two support protrusions and are respectively connected to the AF coil through the upper spring piece.

[0026] The built-in circuit includes a capacitor circuit. The capacitor circuit includes:

[0027] A number of electrode plates are arranged inside the base. One of the electrode plates is correspondingly arranged with one of the magnets in the magnet group;

[0028] A common electrode pin is arranged inside the base, extends out of one of the support protrusions, and is connected to the magnet through the upper spring piece and the built-in metal structure inside the frame;

[0029] An AF electrode plate is arranged on the carrier;

[0030] An AF electrode energization pin is arranged inside the base, extends out of one of the support protrusions, and is connected to the AF electrode plate through the upper spring piece.

[0031] The AF electrode plate is embedded in the carrier.

[0032] A part of the upper spring piece is bent and fixed on the side wall of the carrier to form the AF electrode plate.

[0033] The upper spring piece is composed of four independent upper spring branches. The four upper spring branches surround each other, and there is a certain distance between adjacent two upper spring branches. Each upper spring branch is respectively connected to the base, the frame and the carrier, and one upper spring branch is connected to a corresponding support protrusion.

[0034] The OIS coils in the OIS coil group can be wound around the winding posts of the base.

[0035] The lens driving device further includes:

[0036] A driving FPC board is arranged on the base, at the bottom ends of the frame and the magnet group, and is internally provided with a plurality of the electrode plates and the OIS coils in the OIS coil group. One of the electrode plates is arranged above a corresponding one of the OIS coils.

[0037] Beneficial effects: The present invention has the following advantages:

[0038] 1. Through the compact design of the housing, the base and the driving assembly, on the premise of achieving good three-axis movement operation of the lens, the axial thickness of the lens driving device is smaller, which is suitable for the thin and light design of electronic products.

[0039] 2. The structural design of the upper spring piece can not only achieve the reset effect when the lens moves in three axes, but also be used to establish a connection relationship between the built-in circuit, the magnet, the AF coil, and a plurality of electrode plates.

[0040] 3. When the frame moves in the X-axis and Y-axis directions, the friction between the frame and the base can be reduced by a plurality of balls.

[0041] 4. The attractive force generated between the built-in adsorption iron sheet and the magnet makes the frame closely attached to the base, making the structure of the lens driving device more compact. At the same time, it ensures that the balls can be in contact with the ball grooves of the base and the ball grooves of the frame, ensuring the use effect of the balls.

[0042] 5. The built-in circuit is located in the base, and all the pin leads are led out from the base, so that the overall layout of the lens driving device is reasonable and simple. The coil circuit is used to supply power to the OIS coil and the AF coil. The capacitor circuit can achieve the position sensor effects in the X-axis, Y-axis, and Z-axis directions, achieving the purpose of a closed-loop lens driving device;

[0043] 6. Since the capacitor circuit is added, the OIS coil may affect the capacitor circuit after being powered on, resulting in a reduction in the position monitoring accuracy. Therefore, by setting a driving FPC board to replace the structure of directly winding the OIS coil on the base and improving the internal structure of the driving FPC board, it can be combined with the capacitor circuit to avoid the above problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is an exploded view of an embodiment of the present invention;

[0045] Figure 2 is Figure 1 a further exploded view;

[0046] Figure 3 is Figure 2 another perspective view;

[0047] Figure 4 For Figure 2 the further exploded view of;

[0048] Figure 5 For Figure 1 the exploded view of the energized structure among the various structures in;

[0049] Figure 6 For Figure 5 the structural diagram of the built-in circuit in;

[0050] Figure 7 For Figure 6 the structural diagram of the capacitor circuit in;

[0051] Figure 8 the exploded view of another embodiment of the present invention;

[0052] Figure 9 For Figure 8 the further exploded view of;

[0053] Figure 10 For Figure 9 the further exploded view of;

[0054] Figure 11 For Figure 9 the front view of the driving FPC board in;

[0055] Figure 12 For Figure 11 the internal layout diagram of the driving FPC board in;

[0056] Figure 13 For Figure 11 the A-A sectional view of;

[0057] Figure 14 For Figure 13 the enlarged partial view in; Specific embodiments

[0058] In order to make the technical means, creative features, achieved purposes and effects achieved by the present invention easy to understand, the present invention will be further described below with reference to specific illustrations.

[0059] Embodiment 1:

[0060] Refer to Figures 1 to 7, the present invention provides a lens driving device, which includes a housing 1, a base 2, a driving assembly, a carrier 4, a frame 5, an upper spring piece 6 and a lower spring piece 7. Among them, the lower spring piece 7 is an optional structure. The driving assembly includes an OIS coil group having a plurality of OIS coils 31, a magnet group having a plurality of magnets 32 and an AF coil 33. There is a hollow cavity between the housing 1 and the base 2, and the housing 1 and the base 2 are preferably connected by buckling to form the hollow cavity. The driving assembly is arranged in the hollow cavity. An axially communicating lens through hole is axially arranged in the middle parts of the housing 1, the base 2 and the carrier 4 to accommodate the lens.

[0061] The OIS coils 31 are arranged on the base 2, the magnets 32 are fixed on the frame 5. The number of the OIS coils 31 is the same as that of the magnets 32 and they are arranged in one-to-one correspondence. The AF coil 33 is arranged outside the carrier 4. The carrier 4 is sleeved inside the frame 5, and the carrier 4 can move along the Z axis relative to the frame 5 inside the frame 5. The frame 5 is arranged on the base 2, and the frame 5 can move along the X axis and the Y axis on the base 2. The upper spring piece 6 is located above the base 2, the frame 5 and the carrier 4, and the upper spring piece 6 is respectively connected to the base 2, the frame 5 and the carrier 4.

[0062] Through the above compact design of the present invention, under the action of the OIS coils 31 and the corresponding magnets 32, the frame 5 together with the magnets 32 and the carrier 4 will move in the X-axis and Y-axis directions in the hollow cavity. Under the action of the AF coil 33 and the magnets 32, the carrier 4 will move along the Z axis relative to the frame 5. Since the lens is installed in the carrier 4, the three-axis movement operation of the lens is realized. Also, due to the structural design of the upper spring piece 6, it is simultaneously connected to the base 2, the frame 5 and the carrier 4. Under the elastic action of the upper spring piece 6, when the frame 5 moves along the X axis and the Y axis relative to the base 2 or when the carrier 4 moves along the Z axis relative to the frame 5, the upper spring piece 6 can play an auxiliary resetting effect.

[0063] Preferably, the lower spring piece 7 is located between the bottom end of the frame 5 and the bottom end of the carrier 4, and is respectively connected to the frame 5 and the carrier 4. The lower spring piece 7 can play an auxiliary resetting role after the carrier 4 moves along the Z axis relative to the frame 5.

[0064] Preferably, referring to Figure 4 , the lower spring piece 7 may include an integrally arranged elastic sheet ring and four bent lower chord wires arranged around the elastic sheet ring. One end of each lower chord wire is integrally fixed to the elastic sheet ring, and the other end is integrally connected to a lower frame fixing piece, and the lower frame fixing piece is used to be fixed to the bottom end of the frame 5. The four lower chord wires can be evenly arranged around the elastic sheet ring at an angle of 90°. An integrally arranged lower carrier fixing piece is arranged on the elastic sheet ring between two adjacent lower chord wires, and the lower carrier fixing piece is fixed to the bottom end of the carrier 4.

[0065] Preferably, there are four OIS coils 31 in the OIS coil group, and the four OIS coils 31 are arranged along the four sides of the base 2. More preferably, the OIS coils 31 can be wound around the winding posts of the base 2.

[0066] Preferably, there are four magnets 32 in the magnet group, and the four magnets 32 are arranged along the four sides of the frame 5.

[0067] Preferably, a magnet mounting groove is provided on the inner side of the bottom end of the frame 5, and the magnet 32 is fixed in the magnet mounting groove.

[0068] Preferably, a conductive coating is provided on the outer side surface of the magnet 32 to achieve a better conductive effect.

[0069] Preferably, support protrusions 21 are provided at the four corner positions of the base 2, an internal circuit is provided in the support protrusions 21, and the top end of the support protrusions 21 is connected to the top end of the frame 5 through an upper spring piece 6, and the internal circuit is connected to the AF coil 33 through the upper spring piece 6.

[0070] Preferably, referring to Figure 5 , the frame 5 has a frame internal metal structure 51, the frame internal metal structure 51 is connected to the magnet 32, and the magnet 32 is connected to the upper spring piece 6 through the frame internal metal structure 51. When there are four magnets 32, the frame internal metal structure 51 preferably has a quasi-octagonal structure formed by sequentially connecting straight edges and oblique edges. Each straight edge is respectively connected to a magnet 32.

[0071] Preferably, referring to Figure 2 , a plurality of base ball grooves 22 are provided on the base 2, corresponding frame ball grooves 52 are provided at the bottom end of the frame 5, one frame ball groove 52 is arranged above a corresponding base ball groove 22, and balls 81 are arranged in the groove cavity formed between the frame ball groove 52 and the corresponding base ball groove 22. After the above design, the friction between the frame 5 and the base 2 can be reduced when the frame 5 moves in the X-axis and Y-axis directions.

[0072] Preferably, base ball grooves 22 are provided on one side of the bottom ends of the four support protrusions 21 of the base 2, that is, balls 81 are provided at the four corner positions of the base 2.

[0073] Preferably, referring to Figure 5 , internal adsorption iron sheets 82 are embedded inside the four corner positions of the base 2. A certain attraction force will be generated between the internal adsorption iron sheets 82 and the magnets 32, and this attraction force will make the frame 5 tightly attached to the base 2, making its structure more compact, and at the same time ensuring that the balls 81 can be in contact with the base ball grooves 22 and the frame ball grooves 52, ensuring the use effect of the balls 81.

[0074] Preferably, referring toFigure 5 The built-in circuit includes a coil circuit, and the coil circuit includes a plurality of OIS coil pins and two AF coil pins.

[0075] The number of OIS coil pins can be set according to the number of OIS coils. More preferably, when there are four OIS coils, the two OIS coils in the X-axis direction share two OIS coil X pins, and the two OIS coil X pins are respectively the OIS coil X+ pin 311 and the OIS coil X- pin 312. The two OIS coils in the Y-axis direction share two OIS coil Y pins, and the two OIS coil Y pins are respectively the OIS coil Y+ pin 313 and the OIS coil Y- pin 314. The layout of the OIS coil X+ pin 311, the OIS coil X- pin 312, the OIS coil Y+ pin 313, and the OIS coil Y- pin 314 can be arranged according to the actual situation.

[0076] The two AF coil pins are respectively the AF coil + pin 331 and the AF coil - pin 332. The two AF coil pins respectively extend out of the two support protrusions 21. Specifically, when setting, the two AF coil pins can be relatively arranged within the two diagonal support protrusions 21 and the tops extend out of the support protrusions 21. The two AF coil pins are respectively connected to the AF coil 33 through the upper spring piece 6. Since the AF coil 33 is not arranged on the base 2 but on the outside of the carrier 4, the circuit connection relationship between the two can be established through the upper spring piece 6 respectively connected to the base 2 and the carrier 4. When the AF coil pins are energized, the AF coil 33 is energized through the upper spring piece 6.

[0077] Preferably, referring to Figures 5 to 7 The built-in circuit includes a capacitor circuit, and the capacitor circuit includes a plurality of electrode plates 91, a common electrode pin 92, an AF electrode plate 93, and an AF electrode power-on pin 94.

[0078] A plurality of electrode plates 91 are arranged in the base 2. The number of electrode plates is the same as the number of magnets 32, and one electrode plate 91 is correspondingly arranged with one magnet 32. The electrode plates are preferably four pieces, and the four electrode plates are surrounded. The four electrode plates are respectively the X-axis electrode plate 911, the X-axis electrode plate 912, the Y-axis electrode plate 913, and the Y-axis electrode plate 914. The X-axis electrode plate 911 and the X-axis electrode plate 912 are relatively arranged. The Y-axis electrode plate 913 and the Y-axis electrode plate 914 are relatively arranged.

[0079] The common electrode pin 92 is arranged in the base 2. The common electrode pin 92 extends out of one support protrusion 21, and the common electrode pin 92 is connected to the magnet 32 through the upper spring piece 6 and the metal structure 51 built in the frame.

[0080] The AF electrode plate 93 is arranged on the carrier 4.

[0081] The power supply pin 94 of the AF electrode is arranged inside the base 2. The power supply pin 94 of the AF electrode extends out of another support projection 21. The power supply pin 94 of the AF electrode is connected to the AF electrode sheet 93 through the upper spring piece 6.

[0082] When the built-in circuit is powered on, the common electrode pin 92 conducts a positive current. This current contacts the magnet through the upper spring piece 6 and the metal structure 51 built in the frame. A single electrode sheet corresponds to a single magnet. The electrode sheet accesses a negative current. At this time, a capacitive structure is formed between the electrode sheet and the magnet. After the frame 5 drives the magnet to move in the X-axis and Y-axis directions, the capacitance value of this capacitor will change. According to this change, the moving position of the frame 5 can be judged, achieving the effect of an X-axis and Y-axis position sensor.

[0083] The top end of the AF electrode sheet 93 is connected to the power supply pin 94 of the AF electrode through the upper spring piece 6. At this time, a capacitive structure is also formed between the AF electrode sheet 93 and the magnet on one side, and the longitudinal moving position of the carrier 4 is judged according to the capacitance value, achieving the effect of a Z-axis position sensor.

[0084] So as to achieve the purpose of a closed-loop lens driving device through the capacitive circuit.

[0085] Preferably, the support projections from which the common electrode pin 92 extends and the support projections from which the power supply pin 94 of the AF electrode extends are the support projections at two diagonal corners.

[0086] Preferably, the support projections from which the common electrode pin 92 extends, the support projections from which the power supply pin 94 of the AF electrode extends, and the two support projections from which the two AF coil pins respectively extend are four mutually independent support projections to avoid mutual interference.

[0087] Preferably, the AF electrode sheet 93 can be buried in the carrier 4.

[0088] Preferably, a part of the upper spring piece 6 can also be bent and fixed on the side wall of the carrier 4 to form the AF electrode sheet 93.

[0089] Preferably, referring to Figure 4 , the upper spring piece 6 is composed of four independent upper spring branches 61. The four upper spring branches 61 surround. There is a certain distance between two adjacent upper spring branches 61. Each upper spring branch 61 is respectively connected to the base 2, the frame 5 and the carrier 4. One upper spring branch 61 is connected to a corresponding support projection 21.

[0090] Four independent upper spring support pieces 61 are respectively applied to the connection between the common electrode pin 92 and the built-in metal structure 51 of the frame, the connection between the AF electrode energizing pin 94 and the AF electrode piece 93, the connection between the AF coil pin 331 and one end of the AF coil 33, and the connection between the AF coil pin 332 and the other end of the AF coil 33, so that the connections of each module are independent of each other and interference is avoided.

[0091] Preferably, referring to Figure 5 , the two relatively arranged upper spring support pieces 61 have the same structure, and the adjacent two upper spring support pieces 61 have different structures. Each upper spring support piece 61 is preferably integrally formed.

[0092] One structure of the upper spring support piece 61 is strip-like, including an upper base fixing piece for connecting and supporting the protrusion 21, an upper first chord wire, an upper frame fixing piece for connecting the frame 5, an upper second chord wire, and an upper carrier fixing piece for connecting the carrier 4, which are connected in sequence.

[0093] Another structure of the upper spring support piece 61 is L-shaped. From the short side to the long side, it includes an upper base fixing piece for connecting and supporting the protrusion 21, an upper first chord wire, an upper first frame fixing piece for connecting the frame 5, an upper third chord wire, an upper second frame fixing piece for connecting the frame 5, an upper second chord wire, and an upper carrier fixing piece for connecting the carrier 4. The upper third chord wire is used for the transition between the short side and the long side, and the upper first frame fixing piece and the upper second frame fixing piece are respectively arranged on two adjacent sides of the frame 5.

[0094] Embodiment 2:

[0095] Referring to Figures 8 to 14 , the present invention provides a lens driving device. Compared with Embodiment 1, a driving FPC board 95 is added. The driving FPC board 95 is arranged on the base 2, the driving FPC board 95 is located at the bottom ends of the frame 5 and the magnet 32, and a plurality of electrode pieces 91 and a plurality of OIS coils 31 are built in the driving FPC board 95. One electrode piece 91 is arranged above a corresponding OIS coil 31.

[0096] In Embodiment 1, the OIS coil 31 is usually directly wound around the winding post of the base 2. The OIS coil 31 will be located between the built-in electrode piece 91 of the base and the energized magnet 32. After the OIS coil 31 is energized, it may affect the capacitance structure formed by it, resulting in a reduction in the position monitoring accuracy. In this embodiment, the structure of directly winding the OIS coil 31 on the base 2 is replaced by using the driving FPC board 95, and the internal structure of the driving FPC board 95 is improved. In this design structure, the electrode piece 91 and the OIS coil 31 are also respectively powered through the built-in circuit in the base 2. There will be no interference from the OIS coil 31 between the electrode piece 91 and the energized magnet 32, and the position monitoring accuracy is higher.

[0097] The other structures of this embodiment are the same as those of Embodiment 1 and will not be elaborated here.

[0098] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A lens driving device, comprising a housing, a base, a driving component, and a carrier. There is a hollow cavity between the housing and the base. The driving component is disposed in the hollow cavity. The driving component includes an OIS coil group, a magnet group, and an AF coil; It is characterized in that The OIS coil group is disposed on the base, and the AF coil is disposed on the outer side of the carrier; The lens driving device further includes: A frame, disposed on the base, capable of moving in the X-axis and Y-axis directions on the base. A magnet group is fixed on the frame, and the carrier is sleeved inside the frame. The carrier can move in the Z-axis direction inside the frame; An upper spring piece, located above the base, the frame, and the carrier, and connecting the base, the frame, and the carrier respectively; A lower spring piece, located between the bottom end of the frame and the bottom end of the carrier, and connecting the frame and the carrier respectively; Support protrusions are provided at the four corner positions of the base. An internal circuit is provided inside the support protrusions. The top of the support protrusion is connected to the top of the frame through the upper spring piece, and the internal circuit is connected to the AF coil through the upper spring piece; A magnet mounting groove is provided inside the bottom end of the frame, and the magnets in the magnet group are fixed in the magnet mounting groove; A plurality of base ball grooves are provided on the base, and corresponding frame ball grooves are provided at the bottom end of the frame. One of the frame ball grooves is disposed above a corresponding one of the base ball grooves. A ball is disposed in the groove cavity formed between the frame ball groove and the corresponding base ball groove; Internal adsorption iron sheets are buried inside the four corner positions of the base; The frame has a frame internal metal structure, and the frame internal metal structure is connected to the magnet. The magnet is connected to the upper spring piece through the frame internal metal structure; The internal circuit includes a coil circuit, and the coil circuit includes: A plurality of OIS coil pins, respectively connected to the OIS coils in the OIS coil group; Two AF coil pins, respectively extending out of two of the support protrusions, and respectively connected to the AF coil through the upper spring piece; 2. The lens driving device according to claim 1, wherein The internal circuit includes a capacitor circuit, and the capacitor circuit includes: A plurality of electrode sheets, disposed inside the base, and one of the electrode sheets is correspondingly disposed with one of the magnets in the magnet group; A common electrode pin, disposed inside the base, extending out of one of the support protrusions, and connected to the magnet through the upper spring piece and the frame internal metal structure; An AF electrode sheet, disposed on the carrier; An AF electrode power-on pin, disposed inside the base, extending out of one of the support protrusions, and connected to the AF electrode sheet through the upper spring piece; 3. The lens driving device according to claim 2, characterized in that The upper spring piece is composed of four independent upper spring branches. The four upper spring branches surround each other, and there is a certain distance between adjacent two upper spring branches. Each upper spring branch is respectively connected to the base, the frame, and the carrier, and one upper spring branch is connected to a corresponding support protrusion; 4. The lens driving device according to claim 2, wherein The OIS coils in the OIS coil group are wound around the winding posts on the base; Or, The lens driving device further includes: A driving FPC board is disposed on the base, located at the bottom ends of the frame and the magnet group, and internally provided with a plurality of the electrode sheets and the OIS coils in the OIS coil group, and one of the electrode sheets is disposed above a corresponding one of the OIS coils.

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