Base of the lens driving mechanism

Abstract

The present invention discloses a base of a lens driving mechanism. The base integrally forms a rectangular plate body and includes a base embedded metal sheet. A base center hole is provided in the middle of the rectangular plate body. Two opposite base first side portions and two opposite base second side portions are formed around the base center hole. A plurality of first base embedded metal sheet positioning and pressing holes are provided on the two opposite base first side portions, and a plurality of second base embedded metal sheet positioning and pressing holes are provided on the opposite base second side portions. The base embedded metal sheet is accurately positioned by the first base embedded metal sheet and the second base embedded metal sheet. The base of the present invention is provided with a base embedded metal sheet, and the external circuit is connected to the focusing coil of the lens driving mechanism through the base embedded metal sheet, and the external circuit is directly connected to the anti-shake coil through the base embedded metal sheet, which simplifies the process and the circuit and makes the product more reliable.

Description

Technical Field

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

[0002] With the wide popularity of smart phones, the application scope of mobile phone cameras is getting larger and larger. However, currently, most of the sensors of mobile phone cameras are placed in the module outside the motor. The side FPC uses a flexible circuit board, which causes problems such as warping. The sensor detection is unstable. At the same time, when the side FPC uses a flexible circuit board, uneven installation will affect the actual movement stroke. For the vertical movement part of the middle carrier, the power of the bottom FPC is transmitted to the upper spring piece through a suspension wire and then transmitted to the coil on the carrier. When the motor is impacted or after a long time of operation, the reliability of the suspension wire becomes low, and problems such as breakage are likely to occur, resulting in the failure of the entire motor. In addition, a circuit board is usually provided inside the base. The circuit board usually includes many layers. The external circuit and the focusing coil are connected through the circuit board and the suspension wire, etc. The structure is complex, the circuit is not concise enough, and the reliability is affected to a certain extent. Summary of the Invention

[0003] The object of the present invention is to provide a lens driving mechanism to solve the problems existing in the above-mentioned prior art.

[0004] To solve the above problems, according to one aspect of the present invention, a base of a lens driving mechanism is provided. The base integrally forms a rectangular plate main body and includes a base embedded metal sheet. A base center hole is provided in the middle of the rectangular plate main body. Two opposite base first sides and two opposite base second sides are formed around the base center hole. A plurality of first base embedded metal sheet positioning and pressing holes are provided on the two opposite base first sides, and a plurality of second base embedded metal sheet positioning and pressing holes are provided on the opposite base second sides. The base embedded metal sheet is accurately positioned through the first base embedded metal sheet and the second base embedded metal sheet.

[0005] In one embodiment, a plurality of first tape cutting grooves are further provided on the base first side, and a plurality of second tape cutting grooves are further provided around the base center hole.

[0006] In one embodiment, the plurality of first tape cutting grooves are provided at both ends and the middle of the first side, and the plurality of second tape cutting grooves are evenly arranged around the base center hole.

[0007] In one embodiment, the first tape cutting groove forms a "U" - shaped groove and includes a bottom and side walls, and an arc - shaped portion is formed on the side walls.

[0008] In one embodiment, suspension wire fixing holes are further provided at the four corners of the base, suspension wire connecting parts are provided at the four corners of the metal sheet embedded in the base, and the suspension wire connecting parts are correspondingly matched with the suspension wire connecting holes of the base and are used for connecting the suspension wires of the lens driving mechanism.

[0009] In one embodiment, a central opening of the metal sheet embedded in the base, which is matched with the central hole of the base, is formed inside the metal sheet embedded in the base. A circuit board connecting part avoiding groove is provided around the central hole of the base, and a plurality of circuit board connecting parts are provided around the central opening of the metal sheet embedded in the base. The plurality of circuit board connecting parts are arranged in the circuit board connecting part avoiding groove and are used for connecting the circuit board of the lens driving mechanism.

[0010] In one embodiment, the first strip of material is provided at the suspension wire connecting part, the second strip of material is provided in the middle of the side part of the metal sheet embedded in the base, the first strip of material and the second strip of material are arranged in the first strip of material cutting groove of the base, the circuit board connecting part is integrally formed with one of the external connection ends and is provided with a third strip of material, and the third strip of material is arranged in the second strip of material cutting groove on the base.

[0011] In one embodiment, the metal sheet embedded in the base is further provided with a sensor mounting part, the sensor mounting part protrudes upward from the metal sheet embedded in the base by a certain distance, and an arc part is provided at the place where the sensor mounting part is connected to the metal sheet embedded in the base.

[0012] In one embodiment, the metal sheet embedded in the base includes two opposite first side parts of the metal sheet embedded in the base and two opposite second side parts of the metal sheet embedded in the base. An external circuit connecting part is provided on the second side part of the metal sheet embedded in the base. The sensor mounting part includes a first sensor mounting part and a second sensor mounting part, and the first sensor mounting part and the second sensor mounting part are respectively arranged on one of the adjacent first side parts of the metal sheet embedded in the base and one of the second side parts of the metal sheet embedded in the base.

[0013] In one embodiment, the first side part of the metal sheet embedded in the base is composed of two long strip-shaped metal strips. The two ends of the two metal strips extend to the two opposite second side parts of the metal sheet embedded in the base and are bent to form two of the external circuit connecting parts. The two metal strips are bent upward at a position near the end of the first side part of the metal sheet embedded in the base to form the first sensor mounting part, and the arc part is formed at the place where the first sensor mounting part is connected to the metal strip..

[0014] Compared with the prior art, the base of the present invention is provided with an embedded metal sheet in the base, and the external circuit is connected to the focusing coil of the lens driving mechanism through the embedded metal sheet in the base, and the external circuit is directly connected to the anti-shake coil through the embedded metal sheet in the base, simplifying the process and the circuit, and making the product more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded perspective view of a lens driving mechanism according to an embodiment of the present invention;

[0016] Figure 2 is a perspective view of a frame according to an embodiment of the present invention;

[0017] Figure 3 is a perspective view of a carrier according to an embodiment of the present invention;

[0018] Figure 4A is a perspective view of a base according to an embodiment of the present invention;

[0019] Figure 4B is Figure 4A a partially enlarged view of [], which shows in detail the sensor mounting portion;

[0020] Figure 5A is a perspective view of an embedded metal sheet in the base according to an embodiment of the present invention;

[0021] Figure 5B is another perspective view of an embedded metal sheet in the base according to an embodiment of the present invention;

[0022] Figure 6 is a top view of a lens driving mechanism according to an embodiment of the present invention, in which the housing has been removed;

[0023] Figure 7 is a bottom view of a lens driving mechanism according to an embodiment of the present invention, in which the housing has been removed;

[0024] Figure 8 is a cross-sectional view of a lens driving mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] 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.

[0026] In the following description, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other 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.

[0027] References to "an embodiment" or "one embodiment" in the course of the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in an embodiment" or "in one embodiment" in various places throughout the 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.

[0028] 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, words such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be construed as limiting terms.

[0029] The present invention generally relates to a lens driving mechanism, which includes a housing, a carrier, a frame, a magnet group, a base, an upper spring piece, a lower spring piece, a suspension wire, a circuit board, and a metal sheet embedded in the base. The carrier is used to mount the lens and is wound with a focusing coil. The frame has a central opening, and the magnet group is mounted on the frame and arranged around the central opening. The carrier is disposed within the central opening of the frame. The upper spring piece movably connects the upper surface of the carrier to the upper surface of the frame, and the lower spring piece movably connects the lower surface of the carrier to the lower surface of the frame. The suspension wire suspends the frame and its carrier on the base. The anti-shake coil is built in the circuit board. The focusing coil on the carrier cooperates with the magnet group to drive the carrier to move along the optical axis (defined as the Z-axis) direction to achieve the focusing function. The anti-shake coil in the circuit board cooperates with the magnet group to drive the frame and the carrier to perform two-dimensional displacement movements along the X-axis and Y-axis directions to achieve the optical anti-shake function, where the X-axis, Y-axis, and Z-axis are perpendicular to each other. In the present invention, a sensor is provided on the base to detect the offset displacements of the carrier in the X-axis and Y-axis directions perpendicular to the optical axis direction, and transmit the offset displacements to the controller, thereby controlling the magnitude and direction of the current in the anti-shake coil, so that the lens moves in the direction opposite to the offset displacement to achieve optical anti-shake. While in the direction parallel to the optical axis (i.e., the Z-axis), no sensor is provided, but it is adjusted by the magnitude of the current in the coil to control autofocus. For example, when detecting the stroke in the Z-axis direction of each product, assuming the stroke is 100, multiple different positions are set in the Z-axis stroke, and the current magnitudes corresponding to the positions are recorded and pre-set in the chip. In actual driving, only the current needs to be raised to the corresponding intensity to control the driving position and achieve the focusing function. This design reduces the number of sensors, simplifies the component structure, reduces the manufacturing and processing costs, and improves the reliability of the product.

[0030] In addition, in one embodiment, the sensor is mounted on the metal sheet embedded in the base and is directly connected to the outside for signal and circuit communication through the metal sheet embedded in the base, improving the signal transmission efficiency and reliability. In addition, through the arc design of the mounting portion of the metal sheet embedded in the base, the strength of the mounting portion of the metal sheet embedded in the base is further improved, increasing the anti-pressure when the metal sheet embedded in the base is pressed into the base.

[0031] The following combines the attached Figures 1-7 A detailed description will be given to the lens driving mechanism of an embodiment of the present invention.

[0032] Figure 1 is a three-dimensional exploded view of the lens driving mechanism of an embodiment of the present invention. As Figure 1As shown in the figure, the lens driving mechanism 100 of an embodiment of the present invention generally includes a housing 10, an upper spring piece 20, a frame 30, a magnet group 40, a carrier 50, a lower spring piece 21, a base 60, a circuit board 61, a metal piece 62 embedded in the base, and a suspension wire 90. The metal piece 62 embedded in the base is disposed within the base 60, and the circuit board is disposed on the surface of the base 60 facing the housing. The upper spring piece 20 movably connects the upper surface of the carrier 50 and the lower surface of the frame 30, and the lower spring piece 21 movably connects the lower surface of the carrier 50 and the lower surface of the frame 30. The magnet group 40 is fixedly installed on the inner wall of the frame 30. The suspension wire 90 suspends the frame 30 and the carrier 50 on the base 60. The carrier 30, its upper spring piece 20, the magnet group 40, the frame 30, and the lower spring piece 21 are accommodated in the space defined by the cooperation of the housing 10 and the base 60. The carrier 50 is provided with a focusing coil, and the circuit board 61 is internally provided with an anti-shake coil. The focusing coil and the anti-shake coil cooperate with the magnet group 40 to drive the carrier 50 to move along the mutually perpendicular Z-axis, X-axis, or Y-axis when energized, so as to achieve the focusing function and the optical anti-shake function of the lens driving mechanism. The following will describe each component of the lens driving mechanism of the present invention in conjunction with Figures 2-8 Describe each component of the lens driving mechanism of the present invention.

[0033] Figure 2 is a perspective view of the frame 30 of an embodiment of the present invention. As Figure 2 shown, the frame 30 has a central opening 31, and a magnet group 40 is disposed on three inner walls surrounding the central opening 31. Specifically, the magnet group 40 includes three magnets, and one magnet is fixedly placed on each of the three inner walls of the frame 30. A frame upper spring piece mounting portion 32 is disposed on the surface of the frame 30 facing the housing (simply referred to as the upper surface). The frame upper spring piece mounting portion 32 is disposed at the four corners of the upper surface of the frame 30, and a frame upper spring piece mounting protrusion 321 is provided on each frame upper spring piece mounting portion 32. The frame upper spring piece mounting protrusion 321 cooperates with the upper spring piece outer ring mounting hole 21 of the outer ring of the upper spring piece 20, so as to fixedly connect the outer ring of the upper spring piece 20 and the upper surface of the frame 30. Frame suspension wire mounting grooves 33 extending in the height direction of the frame are further provided at the four corners of the frame 30 to accommodate the suspension wire 90. The lower end of the suspension wire 90 is connected to the metal piece 62 embedded in the base of the base 60, then passes through the frame suspension wire mounting groove 33 and is connected to the suspension wire connecting portion of the upper spring piece 20 at the upper end, and is electrically connected to the focusing coil on the upper spring piece 20 and the carrier 50. Therefore, on the one hand, the suspension wire 90 suspends the frame 30 and the carrier 50 on the base 90, and on the other hand, it also has the function of conducting electricity and acts as a conductor between the external circuit and the focusing coil.

[0034] Figure 3 is a perspective view of the carrier 50 of an embodiment of the present invention. As Figure 3As shown, a carrier center opening 54 is provided inside the carrier 50 for installing a lens. The outer diameter of the carrier center opening 54 matches the inner diameter of the center opening 31 of the frame 30, such that the carrier 50 can be movably placed inside the center opening 31 of the frame 30. The magnet group 40 surrounds three sides of the carrier 50. Coil mounting portions 52 are provided on two opposite side portions of the carrier 50. The coil mounting portions 52 protrude a certain distance from the surface of the carrier 50 and are wound with focusing coils 53. The focusing coils 53 cooperate with two of the magnets in the magnet group 40. When the focusing coils 40 are energized, due to the electromagnetic induction effect, the carrier 50 can move along the optical axis direction, i.e., the Z-axis direction, thereby realizing the function of optical zoom. Carrier upper spring fixing posts 55 are provided around the carrier center opening 54. An inner ring mounting hole 22 is provided on the inner ring of the upper spring 20. By cooperating the inner ring mounting hole 22 with the carrier upper spring fixing posts 55, the inner ring of the upper spring 20 is fixed on the carrier 50.

[0035] Figure 4A is a perspective view of the base 60, Figure 4B is Figure 4A a partial enlarged view of. As Figures 4A-4B shown, the base 60 integrally forms a rectangular plate main body. A base center hole 601 is provided in the middle of the rectangular plate main body to correspond and cooperate with the carrier inner center hole 54. Two opposite base first side portions 60A and two opposite base second side portions 60B are formed around the base center hole 601. A plurality of first base embedded metal sheet positioning and pressing holes 604 are provided on two opposite base first side portions 60A, and a plurality of second base embedded metal sheet positioning and pressing holes 605 are provided on the opposite base second side portions 60B. The aperture of the first base embedded metal sheet positioning and pressing holes 604 is larger, and the aperture of the second base embedded metal sheet positioning and pressing holes 605 is smaller. Through the size cooperation of the first base embedded metal sheet positioning and pressing holes 604 and the second base embedded metal sheet positioning and pressing holes 605, better processing positioning of the base embedded metal sheet 62 can be achieved, facilitating accurate positioning and processing of the base embedded metal sheet, and realizing the formation of specific features on the base embedded metal sheet 62.

[0036] Continuing to refer to Figure 4A , a plurality of first tape cutting grooves 606 are also provided on the base first side portion 60A. Preferably, the plurality of first tape cutting grooves 606 are arranged at both ends and in the middle of the first side portion 60A. A plurality of second tape cutting grooves 607 are provided around the base center hole 601. The plurality of second tape cutting grooves 607 are preferably arranged evenly around the base center hole 601.

[0037] Next, referring to Figure 4B the first tape cutting groove 606 as an example to describe the tape cutting groove in detail. The specific structure of the second tape cutting groove 607 is similar to that of the first tape cutting groove 606 and will not be elaborated here. As Figure 4BAs shown, the first tape cut groove 606 integrally forms a "U" - shaped groove and includes a bottom 6061 and side walls 6062. An arc portion 6063 is formed on the side walls 6062. By providing the first tape cut groove 606 and the second tape cut groove 607 and their unique structural design, laser splash can be prevented during the laser processing of the base - embedded metal sheet 62. A plurality of avoidance grooves 608 for the connection parts of the base - embedded metal sheet are also provided around the central hole 601 of the base to cooperate with the connection parts of the base - embedded metal sheet. Preferably, the avoidance grooves 608 for the connection parts of the base - embedded metal sheet are arranged between every two second tape cut grooves 607.

[0038] Referring Figure 4A , the base 60 also has a plurality of circuit - board fixing posts 602 to fix the circuit board 61 on the base 60. Suspension - wire fixing holes 603 are also provided at the four corner portions of the base 60. The lower ends of the suspension wires 90 are fixed in the suspension - wire fixing holes 603. Preferably, the suspension - wire fixing holes 603 are arranged adjacent to and communicate with the first tape cut grooves 606 at both ends of the first side portion 60A, so that the damping glue at the end of the suspension wire 60 can be accommodated in the tape cut groove.

[0039] Figure 5A is a perspective view of the base - embedded metal sheet 62, Figure 5B is another perspective view of the base - embedded metal sheet 62. Now, referring Figures 5A-5B to explain the base - embedded metal sheet 62 of an embodiment of the present invention. As Figure 5A shown, the base - embedded metal sheet 62 is integrally disposed inside the base 60 and is electrically connected to the circuit board 61. Suspension - wire connection parts 621 are provided at the four corner portions of the base - embedded metal sheet 62. The suspension - wire connection parts 621 cooperate with the suspension - wire connection holes 603 of the base 60, and the lower ends of the suspension wires 90 are connected to the suspension - wire connection parts 621. A central opening 622 of the base - embedded metal sheet that matches the central hole of the base is formed inside the base - embedded metal sheet 60. A plurality of circuit - board connection parts 623 are provided around the central opening 622 of the base - embedded metal sheet. The circuit - board connection parts 623 are located in the avoidance grooves 603 for the circuit - board connection parts of the base 60. The base - embedded metal sheet 62 is electrically connected to the circuit board 61 through the circuit - board connection parts 623. Both sides of the base - embedded metal sheet 62 are bent away from the housing to form a plurality of external connection ends 624. The base - embedded metal sheet 62 is connected to an external circuit, a controller, etc. through the plurality of external connection ends 624. A first tape 6211 is provided at the suspension - wire connection part 621. A second tape 6212 is provided in the middle of the side portion of the base - embedded metal sheet 62. The first tape 6211 and the second tape 6212 cooperate with the first tape cut groove 606 on the base 60. The circuit - board connection part 623 is integrally formed with one of the external connection ends 624 and is provided with a third tape 6231. The third tape 6231 cooperates with the second tape cut groove 607 on the base 60.

[0040] As shown Figure 5B in the figure, the base-embedded metal sheet 62 as a whole includes two opposite first side portions 62A of the base-embedded metal sheet and two opposite second side portions 62B of the base-embedded metal sheet. The second side portion 62B of the base-embedded metal sheet is provided with the above-mentioned external circuit connection portion 624. One of the first side portions 62A of the base-embedded metal sheet and one of the second side portions 62B of the base-embedded metal sheet are further respectively provided with a first sensor mounting portion 625 and a second sensor mounting portion 626. The structures of the first sensor mounting portion 625 and the second sensor mounting portion 626 are similar. Now, the first sensor mounting portion 625 will be taken as an example for description.

[0041] Continue to refer to Figure 5B , the first sensor mounting portion 625 is integrally formed with two of the external circuit connection ends 624. Specifically, the first side portion 62A of the base-embedded metal sheet is composed of two long strip-shaped metal strips. The two ends of the two metal strips are located at the two opposite second side portions 62B of the base-embedded metal sheet and are bent to form two of the external circuit connection portions 624. The two metal strips are bent upward at a position near the end of the first side portion 62A of the base-embedded metal sheet to form the first sensor mounting portion 625, and the two metal strips are disconnected at the first sensor mounting portion 625 to form the first sensor connection end 6251. An arc portion 6252 is formed at the place where the first sensor mounting portion 625 is connected to the metal strip. Since the sensor mounting portion is formed by the upward convex deformation of the metal strip, its compressive resistance is weak. During the process of pressing the base-embedded metal sheet 62 into the base 60, it is easy to break here. After a large number of modeling and experiments, the inventor unexpectedly found that setting an arc at the connection between the sensor mounting portion and the metal strip can increase the strength of the sensor mounting portion and enhance its compressive resistance.

[0042] Refer to Figures 5A-5B , the first sensor mounting portion 625 and the second sensor mounting portion 626 of the base-embedded metal sheet 62 are respectively installed with a first sensor 641 and a second sensor 642. The first sensor 641 and the second sensor 642 respectively cooperate with two mutually perpendicular magnets of the magnet group 40 to detect the displacement of the frame and the carrier in the plane perpendicular to the optical axis (assumed to be the Z axis) (i.e., the X axis and the Y axis). Specifically, return to refer to Figure 1, an internal coil (not shown in the figure) is provided inside the circuit board 61. The internal coil is electrically connected to the metal sheet 62 embedded in the base through the circuit board connection portion 624 on the metal sheet 62 embedded in the base, and cooperates with the magnet group 40 provided in the frame 30 to drive the frame 30 and the carrier 50 to move in a plane perpendicular to the optical axis when powered on. When the first sensor 641 or the second sensor 642 detects the displacement of the frame on the X-axis or Y-axis, the displacement information is timely fed back to the controller, and the controller controls the magnitude and direction of the current in the circuit board 61 to drive the frame and the carrier to move on the X-axis or Y-axis in a direction opposite to the detected displacement direction, thereby realizing the optical image stabilization function.

[0043] Figure 6 is a top view of the lens driving mechanism according to an embodiment of the present invention, in which the housing has been removed. Figure 7 is a bottom view of the lens driving mechanism according to an embodiment of the present invention, in which the housing has been removed. Figure 8 is a cross-sectional view of the lens driving mechanism 100 according to an embodiment of the present invention. As Figures 6-8 shown and combined with Figure 1 -5, the upper spring piece 20 generally includes an outer ring, an inner ring, and an elastic strip connecting the outer ring and the inner ring. The outer ring is provided with an upper spring piece frame connecting portion 202, the inner ring is provided with an upper spring piece carrier connecting portion 201, and a focusing coil connecting portion 203 is provided adjacent to one of the upper spring piece carrier connecting portions 201. The outer ring of the upper spring piece 20 is fixedly connected to the upper surface of the frame 30 through the upper spring piece frame connecting portion 202, and the inner ring of the upper spring piece 20 is fixedly connected to the upper surface of the carrier 50 through the upper spring piece carrier connecting portion 201. The lower spring piece 21 generally includes an outer ring 211, an inner ring 212, and an elastic strip 213 connecting the outer ring and the inner ring. The outer ring 211 and the inner ring 212 of the lower spring piece 21 are respectively fixedly connected to the lower surfaces of the frame 30 and the carrier 50. The external circuit of the present invention is directly electrically connected to the anti-shake coil (i.e., the internal coil provided in the circuit board) through the metal sheet 62 embedded in the base, simplifying the circuit, making the current transmission more stable, the transmission path shorter, and realizing the efficient optical image stabilization function. At the same time, the external circuit is connected to the focusing coil (i.e., the coil on the carrier) through the metal sheet embedded in the base, the suspension wire, and the upper spring piece, without routing through the circuit board, simplifying the circuit, making the circuit more stable, and the focusing effect better. At the same time, the first sensor and the second sensor are also directly connected to the external circuit and the controller through the metal sheet embedded in the base, with efficient and stable signal transmission and high reliability.

[0044] In summary, the lens driving mechanism of the present invention has beneficial technical effects such as simple circuit, high strength, and strong reliability.

[0045] 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 base of a lens driving mechanism, characterized in that, the base integrally forms a rectangular plate body and includes a base-embedded metal sheet. A base center hole is provided in the middle of the rectangular plate body. Two opposite base first side portions and two opposite base second side portions are formed around the base center hole. A plurality of first base-embedded metal sheet positioning and pressing holes are provided on the two opposite base first side portions, and a plurality of second base-embedded metal sheet positioning and pressing holes are provided on the opposite base second side portions. The base-embedded metal sheet is accurately positioned by the first base-embedded metal sheet and the second base-embedded metal sheet; a plurality of first tape cutting grooves are further provided on the base first side portion, and a plurality of second tape cutting grooves are further provided around the base center hole; the base-embedded metal sheet further has a sensor mounting portion, the sensor mounting portion protrudes upward from the base-embedded metal sheet by a certain distance, and an arc portion is provided at the place where the sensor mounting portion is connected to the base-embedded metal sheet.

2. The base according to claim 1, characterized in that, the plurality of first tape cutting grooves are provided at both ends and the middle of the first side portion, and the plurality of second tape cutting grooves are evenly arranged around the base center hole.

3. The base according to claim 1, characterized in that, the first tape cutting groove forms a "U" - shaped groove and includes a bottom and side walls, and an arc portion is formed on the side walls.

4. The base according to claim 2, characterized in that, suspension wire fixing holes are further provided at the four corners of the base, suspension wire connecting portions are provided at the four corners of the base-embedded metal sheet, and the suspension wire connecting portions are correspondingly matched with the suspension wire connecting holes of the base and are used for connecting the suspension wires of the lens driving mechanism.

5. The base according to claim 4, characterized in that, a base-embedded metal sheet center opening that cooperates with the base center hole is formed inside the base-embedded metal sheet. A circuit board connection portion avoidance groove is provided around the base center hole, and a plurality of circuit board connection portions are provided around the base-embedded metal sheet center opening. The plurality of circuit board connection portions are arranged in the circuit board connection portion avoidance groove and are used for connecting the circuit board of the lens driving mechanism.

6. The base according to claim 5, characterized in that, the suspension wire connecting portion is provided with the first tape, the middle of the side portion of the base-embedded metal sheet is provided with the second tape, the first tape and the second tape are arranged in the first tape cutting groove of the base, the circuit board connection portion is integrally formed with one of the external connection ends and is provided with the third tape, and the third tape is arranged in the second tape cutting groove on the base.

7. The base according to claim 1, characterized in that, The base-embedded metal sheet includes two opposite first side portions of the base-embedded metal sheet and two opposite second side portions of the base-embedded metal sheet. An external circuit connection portion is provided on the second side portion of the base-embedded metal sheet. The sensor mounting portion includes a first sensor mounting portion and a second sensor mounting portion, and the first sensor mounting portion and the second sensor mounting portion are respectively disposed on one of the adjacent first side portions of the base-embedded metal sheet and one of the second side portions of the base-embedded metal sheet.

8. The base according to claim 7, wherein, the first side portion of the base-embedded metal sheet is composed of two strip-shaped metal strips. The two ends of the two metal strips extend to the two opposite second side portions of the base-embedded metal sheet and are bent to form two of the external circuit connection portions. The two metal strips are bent upward at positions near the ends on the first side portion of the base-embedded metal sheet to form the first sensor mounting portion, and an arc portion is formed at the place where the first sensor mounting portion is connected to the metal strip.

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