CN220367459U - Lens driving mechanism and base assembly thereof - Google Patents

Abstract

The utility model discloses a lens driving mechanism and a base assembly thereof, wherein the base assembly comprises a base, a frame and a resetting piece, the base is provided with a built-in circuit, a first pole piece and a first coil, the first pole piece is perpendicular to the optical axis direction of a lens, and the first coil and the first pole piece are electrically connected with the built-in circuit. The frame comprises an annular frame, a built-in metal frame, a first connecting piece, a first conducting strip and a magnet group. The built-in metal frame is electrically connected with the built-in circuit and embedded in the annular frame. The first connecting piece is L-shaped and is positioned in the annular frame, and one end of the first connecting piece is connected with the built-in metal frame. The first conducting strip is connected with the other end of the first connecting piece and embedded in the annular frame, is parallel to the first pole piece and is oppositely arranged along the optical axis direction to form a first capacitor. The magnet group is installed in the annular frame, and the magnet group is matched with the first coil to drive the frame to move along the first direction or the second direction. The reset piece is connected with the frame and the base and is used for driving the frame to reset.

Description

Lens driving mechanism and base assembly thereof

Technical Field

The present utility model relates to the field of lens driving technologies, and in particular, to a lens driving mechanism and a base assembly thereof.

Background

In recent years, along with the development of technology, many electronic devices have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user. In practice, in order to accommodate photographing of various scenes, the lens needs to be continuously focused, and in the prior art, a lens driving mechanism is generally used to drive the lens to move along the optical axis direction so as to adjust the focal length.

The lens driving mechanism comprises a frame, a carrier, an upper reed, a lower reed and a base, wherein the carrier is provided with a coil and can be movably arranged in the frame, and the carrier is used for installing a lens. The upper reed is elastic and connected to the top of the frame and the top of the carrier, the lower reed is also elastic and connected to the bottom of the carrier and the bottom of the frame, and the upper reed and the lower reed movably connect the carrier in the frame. The frame is movably arranged above the base and can move along the direction perpendicular to the optical axis of the lens so as to prevent the lens from shaking. The carrier is arranged in the frame and can move along the optical axis direction of the lens so as to adjust the focal length of the lens.

In order to precisely control the movement of the carrier or frame, it is also necessary to sense the specific positions of the carrier and frame in real time. In the prior art, the Hall sensor senses the specific position of the carrier or the frame, but the Hall sensor is large in size and can influence the lightweight design of the lens driving mechanism, and the detection result is unstable and cannot meet the market demand.

Disclosure of Invention

The present utility model is directed to a lens driving mechanism and a base assembly thereof, so as to solve the above-mentioned problems.

To solve the above technical problems, embodiments of the present utility model provide a base assembly, including:

the base is provided with a built-in circuit, a first pole piece and a first coil, the first pole piece is perpendicular to the optical axis direction of the lens, and the first coil and the first pole piece are respectively and electrically connected with the built-in circuit;

a frame, the frame comprising:

the annular frame and the base are arranged at intervals along the optical axis direction;

the built-in metal frame is electrically connected with the built-in circuit and embedded in the annular frame;

the first connecting piece is L-shaped and is positioned in the annular frame, and one end of the first connecting piece is connected with the built-in metal frame;

the first conducting strip is connected with the other end of the first connecting piece and embedded in the annular frame, and is parallel to the first pole piece and is oppositely arranged along the optical axis direction to form a first capacitor;

the magnet group is arranged in the annular frame and matched with the first coil to drive the frame to move along a first direction or a second direction, and the second direction, the first direction and the optical axis direction are perpendicular to each other;

and the resetting piece is connected with the frame and the base and used for driving the frame to reset.

In one embodiment, the base is further provided with a second pole piece, the plane of the second pole piece is parallel to the plane of the first pole piece, and the extending direction of the second pole piece is perpendicular to the extending direction of the first pole piece and is electrically connected with the built-in circuit;

the frame further comprises:

the second connecting piece is L-shaped and is positioned in the annular frame, and one end of the second connecting piece is connected with the built-in metal frame;

the second conducting strip is connected with the other end of the second connecting piece and embedded in the annular frame, and the extending direction of the second conducting strip is perpendicular to the extending direction of the first conducting strip; the second conductive sheet is parallel to the second electrode sheet and is opposite to the second electrode sheet along the optical axis direction to form a second capacitor;

the first connecting piece, the second connecting piece and the magnet are respectively located at different side parts of the annular frame.

In one embodiment, the first connector and the second connector each include:

a first section extending in the first direction and having one end connected to the same side portion of the built-in metal frame extending in the second direction, the first sections of the first and second connecting members being spaced apart in the second direction; and

a second section extending in the optical axis direction and having one end connected to the other end of the first section;

the first conductive sheet and the second conductive sheet are respectively connected with the other ends of the second sections of the first connecting piece and the second connecting piece.

In one embodiment, the built-in metal frame is ring-shaped, and the first sections of the first connecting piece and the second connecting piece are respectively connected with the outer side of the built-in metal frame.

In one embodiment, the first section includes at least two metal strips arranged at intervals along the second direction, the two metal strips extending along the first direction and one end being connected to a side portion of the built-in metal frame extending along the second direction.

In one embodiment, at least a portion of the built-in metal frame, the first connector, the second connector, the first conductive sheet, and the second conductive sheet are integrally formed.

In one embodiment, the base further comprises a substrate, the substrate and the first coil are located at different sides of the base, and the first pole piece and the second pole piece are respectively connected with the substrate.

In one embodiment, a control chip is further disposed in the base, and the control chip is electrically connected with the built-in circuit, the first capacitor and the second capacitor.

The present utility model also relates to a lens driving mechanism comprising:

the base assembly;

the shell covers the outside of the frame and is connected with the base; and

the carrier is arranged in the frame and is provided with a second coil, and the second coil is matched with the magnet group and used for driving the carrier to move along the optical axis direction;

and the reset piece is also connected with the frame and the carrier and is used for driving the carrier to reset.

In one embodiment, the frame further comprises a third connecting piece extending along the first direction and located inside the built-in metal frame, and a third conductive sheet connected to the third connecting piece and having a plane perpendicular to the plane of the first conductive sheet,

and a third pole piece is arranged in the carrier, and the third pole piece is parallel to the third conducting strip and forms a third capacitor.

According to the utility model, the first conductive sheet and the second conductive sheet are connected to the built-in metal frame through the two L-shaped connecting pieces, so that the stability of the first conductive sheet and the second conductive sheet is enhanced, and the stability of the first pole piece and the second pole piece is increased through the substrate, so that the detection accuracy is ensured.

Drawings

Fig. 1, 2 and 3 are exploded views of a lens driving mechanism according to an embodiment of the present utility model.

Figure 4 is an assembled view of the frame, carrier and reed of the embodiment of figure 1.

Fig. 5 is a perspective view of the frame and carrier of the embodiment of fig. 1.

Fig. 6 and 7 are perspective views of the built-in metal frame, the first connection member, the second connection member, the third connection member, the first conductive sheet, the second conductive sheet and the third conductive sheet, the built-in wiring, the first pole piece, the second pole piece, the third pole piece, the control chip and the substrate, the first coil, the second wiring according to one embodiment of the present utility model.

Reference numerals: 100. a lens driving mechanism; 1. a frame; 11. an annular frame; 12. a metal frame is arranged in the steel frame; 13. a first connector; 131. a first section; 132. a second section; 14. a second connector; 15. a third connecting member; 16. a first conductive sheet; 17. a second conductive sheet; 18. a third conductive sheet; 2. a carrier; 21. a second coil; 22. a third pole piece; 3. a bottom plate; 4. a housing; 5. a reed; 6. a circuit board; 61. a first pole piece; 62. a second pole piece; 63. a first coil; 64. a substrate; 65. a control chip; 7. a magnet group; 8. a suspension wire; x, a first direction; y, second direction; z, optical axis direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

The following detailed description of various embodiments of the present utility model will be provided in connection with the accompanying drawings to provide a clearer understanding of the objects, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

Reference throughout this specification to "one embodiment" or "an embodiment" means 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. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The present utility model relates to a lens driving mechanism 100 and a base assembly thereof, and as shown in fig. 1 to 3, the lens driving mechanism 100 includes a base, a frame 1, a carrier 2 for mounting a lens, a housing 4, a reset member, and the like. The base is used for supporting the frame 1 and the carrier 2, and the shell 4 covers the outside of the frame 1 and the carrier 2 and is connected with the base. The frame 1 is suspended above the base through a resetting piece and is movably connected with the base, and the resetting piece can also drive the frame 1 to reset. The carrier 2 is mounted in the frame 1 and can drive the lens to move along the optical axis direction Z, and the reset piece can also drive the carrier 2 to reset.

The resetting piece comprises two reeds 5 and four suspension wires 8, the two reeds 5 are respectively elastic and respectively positioned at the top and the bottom of the frame 1, and the two reeds 5 are respectively connected at the top and the bottom of the frame 1 and the carrier 2. After the carrier 2 moves, the two reeds 5 can drive the carrier 2 to reset. One end of each of the four suspension wires 8 along the optical axis direction Z is connected with the base, the other end extends along the optical axis direction Z and is positioned at the top of the frame 1, and the four suspension wires 8 support the frame 1 through the reed 5 and are suspended above the base. After the frame 1 moves, the four suspension wires 8 can also drive the frame 1 to reset.

The frame 1 is provided with a magnet group 7, and the magnet group 7 cooperates with the first coil 63 to drive the frame 1 to move in a radial direction, which is perpendicular to the optical axis direction Z. The carrier 2 is provided with a second coil 21, and the second coil 21 and the magnet group 7 are matched to drive the carrier 2 to move along the optical axis direction Z.

It should be understood that the optical axis direction Z is the vertical direction in fig. 1-3, that is, the bottom end of the suspension wire 8 is connected to the base, the top end is connected to the reed 5, and the frame 1 and the carrier 2 are suspended above the base by the suspension wire 8.

The base, the frame 1 and the resetting piece form a base assembly, wherein the base comprises a bottom plate 3 and a circuit board 6, a built-in circuit is arranged in the bottom plate 3 and can be electrically connected with an external power supply, and the circuit arrangement of the built-in circuit can be set according to actual requirements. The circuit board 6 is stacked on the top surface of the bottom plate 3 and is electrically connected with the built-in circuit, and a first coil 63, a first pole piece 61 and a second pole piece 62 are arranged in the circuit board 6. The first coil 63, the first pole piece 61, and the second pole piece 62 are also electrically connected to the built-in wiring.

The plane of the first pole piece 61 and the plane of the second pole piece 62 are parallel or in the same plane. In the embodiment shown in fig. 5 and fig. 5, the first pole piece 61 and the first pole piece 61 are respectively connected with the substrate 64, the first pole piece 61, the second pole piece 62 and the substrate 64 are located on the same plane, the substrate 64 is located in the circuit board 6, the plane of the substrate 64 is perpendicular to the optical axis direction Z, the substrate 64 can prevent the first pole piece 61 and the second pole piece 62 from tilting, that is, the plane of the first pole piece 61 and the second pole piece 62 is perpendicular to the optical axis direction Z, and the first pole piece 61 and the first conductive piece 16 on the frame 1 are relatively parallel, and the second pole piece 62 and the second conductive piece 17 are relatively parallel.

The frame 1 includes an annular frame 11, a built-in metal frame 12, a first connecting member 13, a second connecting member 14, a third connecting member 15, a first conductive sheet 16, a second conductive sheet 17, and a third conductive sheet 18. The annular frame 11 is located above the base and is spaced from the base for carrying the carrier 2, and the annular frame 11 is typically formed by injection molding. The built-in metal frame 12 is embedded in the annular frame 11 in an injection molding mode, the built-in metal frame 12 is electrically connected with the reed 5 positioned at the top of the frame 1 in the two reeds 5, and the reed 5 is electrically connected with a built-in circuit of the base through the suspension wires 8.

The first connecting piece 13 and the second connecting piece 14 are embedded in the annular frame 11, and the first connecting piece 13 and the second connecting piece 14 are L-shaped. It should be understood that the shape of the first connector 13 and the second connector 14 may be configured in the same shape, or may be configured in different or similar shapes. The first and second connection members 13 and 14 serve to connect the first and second conductive sheets 16 and 17 to the built-in metal frame 12, preventing the first and second conductive sheets 16 and 17 from being displaced within the frame 1. The first conductive sheet 16 and the second conductive sheet 17 are also embedded within the annular frame 11.

In the embodiment shown in fig. 5 and 6, the built-in metal holder 12 is ring-shaped and has two side portions extending in the first direction X and two other two side portions extending in the second direction Y, which are perpendicular to each other in pairs. The top ends of the first and second connection members 13 and 14 are connected to one side portion of the built-in metal frame 12 extending in the second direction Y, respectively, and the first and second connection members 13 and 14 are disposed at a distance. The first conductive sheet 16 and the second conductive sheet 17 are respectively connected with the bottom ends of the first connecting piece 13 and the second connecting piece 14, and the planes of the first conductive sheet 16 and the second conductive sheet 17 are parallel to the first pole piece 61 and the second pole piece 62, the first conductive sheet 16 and the first pole piece 61 form a first capacitor, the second conductive sheet 17 and the second pole piece 62 form a second capacitor, and the first capacitor and the second capacitor are respectively electrically connected with the control chip 65.

When the frame 1 moves along the first direction X, the relative areas of the first conductive sheet 16 and the first pole piece 61 deform, so that the capacitance of the first capacitor changes, and the control chip 65 can sense the displacement of the frame 1 along the first direction X according to the change of the capacitance of the first capacitor. Similarly, when the frame 1 moves in the second direction Y, the relative areas of the second conductive sheet 17 and the second electrode sheet 62 change, thereby causing the capacitance of the second capacitor to change, and the control chip 65 determines the displacement of the frame 1 in the second direction Y based on the capacitance change of the second capacitor.

In the prior art, the sensor is generally suitable for a hall sensor, that is, a magnet and a sensing element are matched to detect a position, but the sensor has a large size, which increases the weight and the volume of the lens driving mechanism 100.

The utility model utilizes the specific positions of the first capacitor and the second capacitor to sense the frame, the structure of the first capacitor and the second capacitor is light and handy, the whole structure layout is simple, the installation is convenient, and the utility model also has high sensitivity and stability.

In addition, the two electrode plates of the capacitor are required to be parallel to each other, and the planes of the two electrode plates are required to be relatively parallel to each other, so that a stable detection effect can be ensured. For example, when the frame 1 moves in the first direction X, the planes of the first conductive sheet 16 and the first pole piece 61 need to be parallel to each other, and also need to be perpendicular to the optical axis direction Z, which is the most preferable. Optionally, the planes of the first conductive sheet 16 and the first pole piece 61 are within 1 ° of the angle fluctuation range of the optical axis direction Z, that is, the first conductive sheet 16 and the first pole piece 61 are parallel to each other and the included angle with the optical axis direction Z needs to be controlled to be 89 ° -91 ° to ensure the stability of the detection result of the first capacitor. Of course, the second capacitor is also used, and the second conductive sheet 17 and the second electrode sheet 62 need to be parallel to each other and have an included angle with the optical axis direction Z controlled between 89 ° and 91 ° to ensure the detection stability of the second capacitor.

Therefore, based on the above-mentioned research, in order to improve the stability of the first conductive sheet 16, the second conductive sheet 17, the first pole piece 61 and the second pole piece 62 and the detection stability of the first capacitor and the second capacitor, the first pole piece 61 and the second pole piece 62 are mounted on the substrate 64, and the connection stability of the first pole piece 61 and the second pole piece 62 and the circuit board 6 is increased through the substrate 64, so that the included angle between the plane of the first pole piece 61 and the second pole piece 62 and the optical axis direction Z is ensured to be 89 ° -91 °.

In order to ensure the stability of the first conductive sheet 16 and the second conductive sheet 17 in the annular frame 11, the first connecting piece 13 and the second connecting piece 14 are arranged in an L shape, and the first conductive sheet 16 and the second conductive sheet 17 are respectively connected to the built-in metal frame 12 through the first connecting piece 13 and the second connecting piece 14, so that the stability of the first conductive sheet 16 and the second conductive sheet 17 in the annular frame 11 can be enhanced.

Specifically, as shown in fig. 5, the first and second connection members 13 and 14 are substantially similar in shape, and include first and second sections 131 and 132, respectively, adjacent to each other. The first segment 131 extends in the first direction X and one end is connected to a side portion of the built-in metal frame 12 extending in the second direction Y, and the first segment 131 is located outside the built-in metal frame 12, that is, the first segment 131 is formed by extending the outside of the built-in metal frame 12 in the second direction Y. It should be appreciated that in other embodiments, the first segment 131 may also be located inside the built-in metal shelf 12.

The second section 132 extends in the optical axis direction Z and the tip is connected to the end of the first section 131 remote from the metal frame. The first conductive sheet 16 and the second conductive sheet 17 are connected to the bottom ends of the second sections 132 of the first connecting member 13 and the second connecting member 14, respectively, and are connected to the inner side of the second sections 132. The second section 132 is bent at 90 ° relative to the first section 131, the first section 131 and the second section 132 are L-shaped, and the first section 131, the second section 132 and the first conductive sheet 16 or the second conductive sheet 17 form a U-shaped structure. The first segment 131 is substantially coplanar with the built-in metal frame 12, no stress is applied between the first segment 131 and the built-in metal frame 12, a small portion of stress is generated after the second segment 132 is bent 90 ° relative to the first segment 131, the first conductive sheet 16 and the second conductive sheet 17 are not driven to move, and the stress is much smaller than the stress generated after the first segment is bent directly from the built-in metal frame 12.

In addition, the built-in metal frame 12, the first connecting piece 13 and the second connecting piece 14 are built in the annular frame 11, and the L-shaped structures of the second section 132 and the first section 131 can also limit the first conducting strip 16 or the second conducting strip 17 to shift, so that the stability of the first conducting strip 16 and the second conducting strip 17 is further ensured.

Preferably, the first segment 131 includes a plurality of metal strips arranged at intervals along the second direction Y, wherein the metal strips extend along the first direction X and have one end connected to a side portion of the built-in metal frame extending along the second direction Y, and the metal strips are connected to the second segment 132 for the sheet structure, so that the bending area of the second segment 132 relative to the first segment 131 can be reduced, the stress between the second segment 132 and the first segment 131 can be reduced, and the stability of the second segment 132 can be increased. The second section 132 is a U-shaped structure or a sheet-shaped frame structure or a positive structure, which can increase the contact area between the second section 132 and the annular frame 11, thereby increasing the stability of the second section 132.

The first conductive sheet 16 extends in the second direction Y, and the second conductive sheet 17 extends in the first direction X, that is, the extending direction of the second conductive sheet 17 is perpendicular to the extending direction of the first conductive sheet 16. Furthermore, in the embodiment shown in fig. 6, three second conductive sheets 17 are arranged at intervals along the second direction Y, it being understood that more second conductive sheets 17 or first conductive sheets 16 may be arranged as well, depending on the arrangement.

Preferably, the first conductive sheet 16 and the second conductive sheet 17 are closer to the ground of the annular frame 11, i.e., the side facing the base, and more preferably, the bottom surfaces of the first conductive sheet 16 and the second conductive sheet 17 are flush with the bottom surface of the annular frame 11.

Preferably, the first and second pole pieces 61, 62 are adjacent to the top surface of the circuit board 6, and more preferably the top surfaces of the first and second pole pieces 61, 62 are flush with the top surface of the circuit board 6. To enhance the spacing of the first pole piece 61 and the first conductive tab 16 and the spacing of the second pole piece 62 and the second conductive tab 17 to enhance the sensitivity of the first capacitor and the second capacitor.

Preferably, part or all of the built-in metal frame 12, the first connecting member 13, the second connecting member 14, the first conductive sheet 16 and the second conductive sheet 17 are integrally formed, so that the stability of the first conductive sheet 16 and the second conductive sheet 17 can be further increased.

The frame 1 further comprises a third connecting piece 15 and a third conductive piece 18, wherein the third connecting piece 15 comprises two metal strips extending along the first direction X, the two metal strips are positioned inside the built-in metal frame 12, the third conductive piece 18 is sheet-shaped and connected with the third connecting piece 15, and the plane of the third conductive piece 18 is perpendicular to the plane of the first conductive piece 16 and parallel to the optical axis direction Z. Of course, the third connecting member 15 and the third conductive sheet 18 are also preferably integrally formed with the built-in metal frame 12.

A third pole piece 22 is arranged in the carrier 2, and the third pole piece 22 and the third conducting piece 18 are arranged in parallel and opposite to form a third capacitor. When the carrier 2 moves in the optical axis direction Z, the capacitance of the third capacitor changes, and the displacement of the carrier 2 can be determined based on the change in the capacitance of the third capacitor.

In addition, in the embodiment shown in fig. 6, the first connecting piece 13, the second connecting piece 14 and the third connecting piece 15 are respectively connected with the same side portion of the built-in metal frame 12, the side portion is located at the same side portion of the annular frame 11, and the three magnet groups 7 are respectively located at the other several side portions of the annular frame 11, that is, the first conductive sheet 16, the second conductive sheet 17 and the third conductive sheet 18 are disposed at different side portions of the frame 1 with the magnet groups 7, so that the three capacitors are prevented from being infected when the magnet groups 7 are mated with the first coil 63 or the second coil 21.

The circuit board 6 is a rectangular board, and the substrate 64 and the three first coils 63 in the circuit board 6 are respectively disposed on four sides of the circuit board 6, and are also disposed on different sides of the circuit board 6.

The control chip 65 is disposed in the circuit board 6 and electrically connected to the first, second and third capacitors and the built-in circuit. It will be appreciated that in other embodiments, the control chip 65 may also be disposed external to the lens drive mechanism 100.

According to the utility model, the first conducting strip 16 and the second conducting strip 17 are connected to the built-in metal frame 12 through the two L-shaped connecting pieces, so that the stability of the first conducting strip 16 and the second conducting strip 17 is enhanced, and the stability of the first pole piece 61 and the second pole piece 62 is enhanced through the substrate 64, so that the detection accuracy is ensured.

While the preferred embodiments of the present utility model have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (10)

1. Base subassembly, its characterized in that, base subassembly includes:

the base is provided with a built-in circuit, a first pole piece and a first coil, the first pole piece is perpendicular to the optical axis direction of the lens, and the first coil and the first pole piece are respectively and electrically connected with the built-in circuit;

a frame, the frame comprising:

the annular frame and the base are arranged at intervals along the optical axis direction;

the built-in metal frame is electrically connected with the built-in circuit and embedded in the annular frame;

the first connecting piece is L-shaped and is positioned in the annular frame, and one end of the first connecting piece is connected with the built-in metal frame;

the first conducting strip is connected with the other end of the first connecting piece and embedded in the annular frame, and is parallel to the first pole piece and is oppositely arranged along the optical axis direction to form a first capacitor;

the magnet group is arranged in the annular frame and matched with the first coil to drive the frame to move along a first direction or a second direction, and the second direction, the first direction and the optical axis direction are perpendicular to each other;

and the resetting piece is connected with the frame and the base and used for driving the frame to reset.

2. The base assembly of claim 1, wherein the base is further provided with a second pole piece, the plane of the second pole piece is parallel to the plane of the first pole piece, and the extending direction of the second pole piece is perpendicular to the extending direction of the first pole piece and is electrically connected with the built-in circuit;

the frame further comprises:

the second connecting piece is L-shaped and is positioned in the annular frame, and one end of the second connecting piece is connected with the built-in metal frame;

the second conducting strip is connected with the other end of the second connecting piece and embedded in the annular frame, and the extending direction of the second conducting strip is perpendicular to the extending direction of the first conducting strip; the second conductive sheet is parallel to the second electrode sheet and is opposite to the second electrode sheet along the optical axis direction to form a second capacitor;

the first connecting piece, the second connecting piece and the magnet are respectively located at different side parts of the annular frame.

3. The base assembly of claim 2, wherein the first connector and the second connector each comprise:

a first section extending in the first direction and having one end connected to the same side portion of the built-in metal frame extending in the second direction, the first sections of the first and second connecting members being spaced apart in the second direction; and

a second section extending in the optical axis direction and having one end connected to the other end of the first section;

the first conductive sheet and the second conductive sheet are respectively connected with the other ends of the second sections of the first connecting piece and the second connecting piece.

4. The base assembly of claim 3, wherein the built-in metal frame is ring-shaped, and the first sections of the first and second connectors are connected to the outside of the built-in metal frame, respectively.

5. A base assembly according to claim 3, wherein the first section comprises at least two metal strips spaced apart along the second direction, the two metal strips extending along the first direction and being connected at one end to a side of the built-in metal shelf extending along the second direction.

6. The base assembly of claim 2, wherein at least a portion of the built-in metal shelf, the first connector, the second connector, the first conductive tab, and the second conductive tab are integrally formed.

7. The base assembly of claim 2, wherein the base further comprises a base plate on a different side of the base than the first coil, the first pole piece and the second pole piece being connected to the base plate, respectively.

8. The base assembly of claim 7, further comprising a control chip disposed within the base, the control chip electrically connected to the built-in circuit, the first capacitor, and the second capacitor.

9. A lens driving mechanism, characterized by comprising:

the base assembly of any one of claims 1-8;

the shell covers the outside of the frame and is connected with the base; and

the carrier is arranged in the frame and is provided with a second coil, and the second coil is matched with the magnet group and used for driving the carrier to move along the optical axis direction;

and the reset piece is also connected with the frame and the carrier and is used for driving the carrier to reset.

10. The lens driving mechanism as claimed in claim 9, wherein the frame further comprises a third connection member extending in the first direction and located inside the built-in metal frame, and a third conductive sheet connected to the third connection member and having a plane perpendicular to a plane of the first conductive sheet,

and a third pole piece is arranged in the carrier, and the third pole piece is parallel to the third conducting strip and forms a third capacitor.