Base assembly and lens driving device

Abstract

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a base assembly and a lens driving device. Wherein the base assembly comprises a base, a reset mechanism and a base plate, the base plate is movably installed in an inner cavity of the base through the reset mechanism, the reset mechanism comprises a lower reed, an upper reed and a frame, the lower reed is connected between the base and the frame, and the upper reed is connected between the frame and the base plate; the substrate is provided with a coil group used for cooperating with the magnet group. When the coil group is electrified, the coil group cooperates with the magnet group to drive the substrate to move at least along a plane perpendicular to the optical axis. According to the invention, the movement in a larger range can be realized, and a more excellent zoom and / or anti-shake effect can be realized, so that better imaging quality can be obtained. Through the design of the reset mechanism, after the base plate is moved, a good reset effect is achieved under the action of the reset mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of optical imaging equipment, and in particular relates to a base assembly and a lens driving device. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. The use of these electronic devices is becoming more and more common, and they are developing in the direction of convenient and lightweight design to provide users with more choices. However, the photos taken by current mobile phones sometimes look blurry, that is, the pictures taken are not clear enough, and even ghosting or blurring occurs. These reasons, in addition to occasional loss of focus (that is, the camera fails to focus properly), are largely caused by slight shaking when the scene is exposed.

[0003] Generally speaking, such slight shaking often occurs when holding the camera, which may cause the lens of the camera device to deviate, resulting in degradation of the image quality captured by the image sensor. Therefore, in recent years, there has been a relatively large demand for the development of anti-shake technology functions.

[0004] However, most of the existing technologies achieve optical zoom and optical image stabilization functions through the movement of the same component (carrier). The movement range of the carrier is limited by weight, volume, etc., and it is impossible to effectively solve the problem of blurry photos caused by hand shaking during shooting. Summary of the invention

[0005] The present invention aims to solve the above technical problems and provides a base assembly and a lens driving device.

[0006] A base assembly, the base assembly comprising a base, a reset mechanism and a base plate, the base having a base inner cavity with an open top, the base plate being movably mounted in the base inner cavity through the reset mechanism, the reset mechanism comprising a lower spring leaf, an upper spring leaf and a frame, the lower spring leaf being connected between the base and the frame, and the upper spring leaf being connected between the frame and the base plate; A coil group for cooperating with the magnet group is arranged on the substrate. When the coil group is energized, it cooperates with the magnet group to drive the substrate to move at least along a plane perpendicular to the optical axis.

[0007] Optionally, the substrate is located inside the frame, and the upper spring is connected between the top of the frame and the top of the substrate.

[0008] Optionally, the upper spring includes an upper spring outer ring and an upper spring inner ring, both of which are frame-shaped structures, the upper spring inner ring is connected to the inner side of the upper spring outer ring, the upper spring outer ring is connected to the top of the frame, and the upper spring inner ring is connected to the top of the substrate.

[0009] Optionally, the inner sides of the two opposite sides of the upper spring outer ring in the first direction are connected to the outer sides of the two opposite sides of the upper spring inner ring in the first direction, one or more upper spring through holes are arranged on the two opposite sides of the upper spring outer ring in the first direction, the bottom ends of the two opposite sides of the upper spring outer ring in the second direction are connected to the top of the frame, and the bottom end of the upper spring inner ring is connected to the outer side of the top of the substrate; The first direction is perpendicular to the optical axis direction, and the second direction is perpendicular to the first direction and the optical axis direction respectively.

[0010] Optionally, support parts are respectively arranged on two opposite sides of the inner cavity of the base along a first direction, and the first direction is perpendicular to the optical axis direction; Two pairs of bottom ends on the lower spring sheet in the first direction are respectively connected to the two support portions.

[0011] Optionally, the lower spring sheet is a rectangular frame structure, the top ends of two opposite sides of the lower spring sheet in the first direction are respectively connected to the bottom end of the frame, one or more lower spring sheet through holes are arranged on two opposite sides of the lower spring sheet in the second direction, and frame connecting parts are arranged on the inner sides of the two opposite sides of the lower spring sheet in the second direction, and the top ends of the frame connecting parts are connected to the bottom end of the frame; The first direction is perpendicular to the optical axis direction, and the second direction is perpendicular to the first direction and the optical axis direction respectively.

[0012] Optionally, the base assembly further includes a circuit board, which is disposed on the base and supplies power to the coil group on the substrate.

[0013] Optionally, the circuit board is an FPC board.

[0014] Optionally, the circuit board includes a circuit connection portion, a circuit board outer ring and a circuit board inner ring which are connected in sequence, the circuit connection portion is connected to the base outside the inner cavity of the base, the circuit board outer ring is suspended and surrounds the outside of the frame, and the circuit board inner ring is connected to the top of the upper spring sheet at the top of the base; The connection portion between the circuit connection portion and the outer ring of the circuit board passes through a base avoidance opening on the base, and the base avoidance opening communicates with the inside and outside of the base inner cavity; The connection portion between the top end of the outer ring of the circuit board and the inner ring of the circuit board passes through a frame avoidance groove on the frame, and the frame avoidance groove communicates with the inside and outside of the frame.

[0015] Optionally, the base assembly further includes a movable seat, the movable seat is mounted on the upper end of the substrate, the coil assembly is mounted on the top of the movable seat, and a light avoidance opening is provided in the middle of the movable seat.

[0016] Optionally, the coil group has four coils, and the four coils are arranged around the light avoidance opening.

[0017] Optionally, the movable seat is located above the inner cavity of the base.

[0018] Optionally, a sensor installation opening is provided in the middle of the substrate, and the base assembly further includes an image sensor, and the image sensor is installed in the sensor installation opening.

[0019] A lens driving device comprises the base assembly provided by the present invention.

[0020] Beneficial effects: The present invention has at least one or more of the following advantages: 1. The moving parts for realizing zoom and / or anti-shake function of the present invention are located on the substrate, that is, the chip part. The lens zoom and / or anti-shake effect is achieved through the movement of the chip part. It is relatively independent of the lens part, and can realize a wider range of movement, achieve a better zoom and / or anti-shake effect, and thus obtain better imaging quality.

[0021] The circuit board of the present invention has a circuit board outer ring and a circuit board inner ring, which can not only supply power to the image sensor and the coil group, but also, due to this reasonable design, the circuit board has a certain elastic potential energy, which can assist in resetting the substrate.

[0022] 2. The present invention also uses the design of the reset mechanism so that after the substrate moves, a better reset effect can be achieved under the action of the reset mechanism.

[0023] 3. Under the action of the reset mechanism, the present invention realizes the height increase of the substrate and the image sensor, so that there is no need to set a substrate movement avoidance opening on the base to avoid the movement of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of the present invention; Figure 2 for Figure 1 A top view of Figure 3 for Figure 2 AA section view; Figure 4 for Figure 1 Exploded diagram of Figure 5 for Figure 4 Further exploded diagram of; Figure 6 for Figure 4 Schematic diagram of some structures; Figure 7An exploded view of the positional relationship between the substrate, the reset mechanism and the image sensor of the present invention; Figure 8 An exploded view of the positional relationship between the substrate and the reset mechanism of the present invention; Fig. 9 The figure is an exploded view of the structure of the lens driving device of the present invention. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0026] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments 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 cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0027] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0028] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0029] In the following description, for the convenience of description, the concept of "optical axis" is introduced to indicate the propagation direction of light in an optical element. It is an abstract concept and does not mean that there is an axis in a physical sense.

[0030] Reference Figures 1 to 8 An embodiment of the present invention provides a base assembly 1, which is applied to a lens driving device and can be used as a part of the lens driving device to realize the zoom and / or anti-shake function of the lens.

[0031] The base assembly 1 comprises a base 10 , a reset mechanism and a base plate 20 , wherein the reset mechanism comprises a lower spring 30 , an upper spring 40 and a frame 50 .

[0032] The base 10 has an inner cavity with an open top, the reset mechanism is located in the inner cavity of the base, and the base plate 20 is movably installed in the inner cavity of the base through the reset mechanism. Specifically, the lower spring 30 is connected between the base 10 and the frame 50, and the upper spring 40 is connected between the frame 50 and the base plate 20.

[0033] The substrate 20 is provided with a coil group for cooperating with the magnet group, and the coil group and the magnet group form a driving mechanism. When the coil group is energized, it cooperates with the magnet group to drive the substrate 20 to move along the optical axis direction and / or on a plane perpendicular to the optical axis.

[0034] The coil group has a plurality of coils 60, and the magnet group has a plurality of magnets that are arranged opposite to and in the same number as the coils 60. When power is supplied to a portion of the coils 60, the portion of the magnets opposite to the portion cooperates with the driving substrate 20 to move along the optical axis direction, and this portion of the coils 60 can be defined as a zoom coil. When power is supplied to another portion of the coils 60, the portion of the magnets opposite to the portion cooperates with the driving substrate 20 to move along a plane perpendicular to the optical axis, and this portion of the coils 60 can be defined as an anti-shake coil.

[0035] The movement direction perpendicular to the optical axis includes two directions, namely a first direction perpendicular to the optical axis and a second direction also perpendicular to the first direction. If the first direction is defined as the X-axis direction, the second direction is the Y-axis direction, and the optical axis direction is the Z-axis direction.

[0036] The magnet corresponding to the zoom coil and the magnet corresponding to the anti-shake coil can be the same or different. That is to say, the zoom coil and the anti-shake coil can share a group of magnets.

[0037] Of course, when the coil assembly is energized, the present invention cooperates with the magnet assembly to drive the substrate 20 to move only along the optical axis direction or only along a plane perpendicular to the optical axis.

[0038] With the above design, the movement of the substrate 20 can be independent of the lens part, and a wider range of movement can be achieved, achieving a better zoom and / or anti-shake effect, thereby obtaining a better imaging quality. The present invention also designs a reset mechanism, so that the substrate 20 can achieve a better reset effect under the action of the reset mechanism after the movement.

[0039] Under the action of the reset mechanism, the present invention realizes the height increase of the substrate 20 and the image sensor 90, so that there is no need to set a substrate movement avoidance opening on the base 10 to avoid the movement of the substrate 20. Of course, a substrate movement avoidance opening can also be set, such as Figure 3 As shown, a substrate movement avoidance opening 13 communicating inside and outside is provided on the base 10 , and the substrate movement avoidance opening 13 is located below the substrate 20 .

[0040] In one embodiment, the base inner cavity on the base 10 is a rectangular cavity. Specifically, a rectangular frame can be provided on the base 10, and the base inner cavity is formed in the rectangular frame.

[0041] In one embodiment, referring to Figures 3 to 5 The substrate 20 is located inside the frame 50 , and the upper spring leaf 40 is connected between the top of the frame 50 and the top of the substrate 20 .

[0042] In one embodiment, referring to Figures 6 to 8 The upper spring 40 includes an upper spring outer ring 41 and an upper spring inner ring 42, both of which are frame-shaped structures. The upper spring inner ring 42 is connected to the inner side of the upper spring outer ring 41. The upper spring outer ring 41 is connected to the top of the frame 50, and the upper spring inner ring 42 is connected to the top of the substrate 20.

[0043] In one embodiment, referring to Figure 7 The inner sides of the two opposite sides of the upper spring outer ring 41 in the first direction are connected to the outer sides of the two opposite sides of the upper spring inner ring 42 in the first direction. One or more upper spring through holes 411 are provided on the two opposite sides of the upper spring outer ring 41 in the first direction. Figure 6 , the bottom ends of the two opposite sides of the upper spring outer ring 41 in the second direction are connected to the top of the frame 50, that is, the bottom ends of the two opposite sides of the upper spring outer ring 41 in the first direction are not connected to the frame 50. Figure 6 and Figure 8 The four bottom surfaces of the bottom end of the upper spring inner ring 42 are all connected to the outer side of the top end of the base plate 20.

[0044] With the above design, this embodiment enables the substrate 20 to achieve relatively stable and smooth movement and better resetting effect when moving in the first direction.

[0045] In specific implementation, it is preferred that the inner middle portions of the two opposite sides of the upper spring outer ring 41 in the first direction are connected to the outer middle portions of the two opposite sides of the upper spring inner ring 42 in the first direction.

[0046] In a specific implementation, a circle of substrate accommodating grooves can be provided on the outer side of the top end of the substrate 20, and the upper spring inner ring 42 is installed in the substrate accommodating groove.

[0047] During specific implementation, the length direction of the upper spring through hole 411 is preferably the second direction.

[0048] In one embodiment, referring to Figure 5 Support parts 11 are respectively provided on two opposite sides of the base inner cavity of the base 10 along the first direction, and the length direction of the support parts 11 is the second direction.

[0049] The lower spring piece 30 is a rectangular frame structure, and the bottom ends of two pairs of sides of the lower spring piece 30 in the first direction are respectively connected to the two support portions 11 .

[0050] In one embodiment, referring to Figure 7 and Figure 8 The lower spring leaf 30 is a rectangular frame structure. The top ends of the two opposite sides of the lower spring leaf 30 in the first direction are respectively connected to the bottom end of the frame 50. One or more lower spring through holes 31 are arranged on the two opposite sides of the lower spring leaf 30 in the second direction. The inner sides of the two opposite sides of the lower spring leaf 30 in the second direction are provided with frame connecting parts 32. The top ends of the frame connecting parts 32 are connected to the bottom end of the frame 50. That is to say, the two opposite sides of the lower spring leaf 30 in the second direction are not directly connected to the frame 50, but are indirectly connected through the frame connecting parts 32.

[0051] With the above design, in this embodiment, when the substrate 20 moves in the second direction, the frame 50 can drive the substrate 20 to move along the second direction, and the frame 50 can achieve relatively stable and smooth movement and better resetting effect.

[0052] In a specific implementation, the length direction of the lower spring through hole 31 is preferably the first direction.

[0053] In a specific implementation, it is preferred that frame connecting portions 32 are provided at the inner middle portions of two opposite sides of the lower spring leaf 30 in the second direction.

[0054] In one embodiment, referring to Figures 1 to 5 The base assembly 1 also includes a circuit board 70 , which is disposed on the base 10 . The circuit board 70 is mainly used for circuit transmission, and the circuit board 70 supplies power to the coil group on the substrate 20 .

[0055] Of course, when the image sensor 90 is mounted on the substrate 20 , the circuit board 70 also supplies power to the image sensor 90 .

[0056] In one embodiment, the circuit board 70 is a FPC board.

[0057] In one embodiment, referring to Figures 1 to 5 The circuit board 70 includes a circuit connection part 71, a circuit board outer ring 72 and a circuit board inner ring 73 connected in sequence. The circuit connection part 71 is connected to the base 10 outside the inner cavity of the base. The circuit board outer ring 72 and the circuit board inner ring 73 are both located in the inner cavity of the base. The circuit board outer ring 72 is suspended around the outside of the frame 50, and the circuit board inner ring 73 is connected to the top of the upper spring sheet 40 at the top of the substrate 20.

[0058] The connection between the circuit connection part 71 and the circuit board outer ring 72 passes through the base avoidance opening 12 on the base 10, and the base avoidance opening 12 connects the inside and outside of the base inner cavity. The connection between the top of the circuit board outer ring 72 and the circuit board inner ring 73 passes through the frame avoidance groove 51 on the frame 50, and the frame avoidance groove 51 connects the inside and outside of the frame 50.

[0059] The circuit board 70 of the above design extends from the circuit connection part 71 outside the inner cavity of the base through the base avoidance opening 12 and enters the inner cavity of the base and is connected to the circuit board outer ring 72. The circuit board outer ring 72 surrounds the frame 50 and extends from the top of one side through the frame avoidance groove 51 and is connected to the circuit board inner ring 73 at the center. In addition to realizing the function of power supply, the circuit board 70 also has a certain elastic potential energy due to the matching design of the circuit board outer ring 72 and the circuit board inner ring 73, which can assist in the reset of the substrate 20.

[0060] In specific implementation, it is preferred that the inner middle portion of the circuit connection portion 71 is connected to the outer middle portion of one side of the circuit board outer ring 72 , and the inner middle portion on the opposite side of the circuit board outer ring 72 is connected to the outer middle portion of one side of the circuit board inner ring 73 .

[0061] In a specific implementation, when a circle of substrate accommodating grooves is provided on the outer side of the top end of the substrate 20 , the upper spring inner ring 42 and the circuit board inner ring 73 are both installed in the substrate accommodating grooves.

[0062] In one embodiment, the circuit board outer ring 72 and the circuit board inner ring 73 both adopt a rectangular frame structure.

[0063] In one embodiment, referring to Figures 1 to 5 The base 10 assembly also includes a movable seat 80, which is mounted on the upper end of the substrate 20, and the coil group is mounted on the top of the movable seat 80. A light avoidance opening 81 is provided in the middle of the movable seat 80 so that light can pass through the light avoidance opening 81 to irradiate the image sensor 90 in the substrate 20 below it.

[0064] In the design of this embodiment, when the coil group is energized, the magnet group matched therewith drives the substrate 20 and the movable seat 80 to move together.

[0065] In one embodiment, the movable seat 80 has a hollow rectangular structure in cross section.

[0066] In one embodiment, referring to Figure 1 , Figures 2 to 5 The coil assembly has four coils 60, and the four coils 60 are arranged around the light avoidance opening.

[0067] In one embodiment, referring to Figure 3 , the movable seat 80 is located above the inner cavity of the base.

[0068] In one embodiment, referring to Figure 7 A sensor installation opening is provided in the middle of the substrate 20, and the base assembly 1 further includes an image sensor 90, which is installed in the sensor installation opening.

[0069] In the design of this embodiment, when the coil group is energized, the magnet group driving substrate 20 and image sensor 90 cooperate with it move together.

[0070] In one embodiment, the substrate 20 is a substrate having a hollow rectangular structure in cross section.

[0071] An embodiment of the present invention further provides a lens driving device, which includes the base assembly 1 provided by the above embodiments of the present invention.

[0072] Embodiment 1:

[0073] Reference Fig. 9 The lens driving device of this embodiment includes a base assembly 1, a housing 2, a carrier spring 3, a magnet group having a plurality of magnets 4, a carrier 5 and a zoom coil 6.

[0074] An accommodating cavity is formed between the base assembly 1 and the housing 2 , and various components in the base assembly 1 as well as the carrier spring 3 , the magnet 4 , the carrier 5 , and the zoom coil 6 are all arranged in the accommodating cavity.

[0075] When the base assembly 1 has a circuit board, part of the circuit board extends out of the accommodating cavity for connection with an external device. Specifically, when the circuit board has a circuit connecting portion, the circuit connecting portion extends out of the accommodating cavity.

[0076] The carrier spring 3 is connected between the housing 2 and the carrier 5. The magnet 4 is arranged in the housing 2. The carrier 5 is located inside the magnet 4 in the housing 2. Usually, the carrier 5 is provided with an optical element mounting hole for mounting the optical element. A zoom coil 6 is arranged on the outer wall of the carrier 5. The zoom coil 6 is arranged opposite to the inner side of the magnet 4. When the zoom coil 6 is energized, it cooperates with the magnet 4 to drive the carrier 5 to move along the optical axis direction to realize the zoom function.

[0077] The coil group of the base assembly 1 is arranged as an anti-shake coil opposite to the bottom end of the magnet 4. When the anti-shake coil is energized, it cooperates with the magnet 4 to drive the substrate 20 to move in the first direction and the second direction perpendicular to the optical axis to achieve the anti-shake function.

[0078] The base of the base assembly 1 and the housing 2 may be connected to each other, or may not be connected to each other, or each may be fixed to each other by other external components. When the two are not connected, they are preferably adsorbed to each other by an adsorption assembly. Of course, the adsorption assembly may not be provided, depending on the needs of the actual application.

[0079] Of course, when the image sensor 90 is installed in the middle of the substrate 20 and the carrier 5 is installed with an optical element, the image sensor 90 is aligned with the optical element to receive the light transmitted through the optical element.

[0080] Embodiment 2:

[0081] Compared with Example 1, the lens driving device of this embodiment includes a base assembly 1, a housing, a magnet and a carrier, and does not include a carrier spring and a zoom coil. At this time, unlike Example 1, the carrier is fixed in the housing, the coil group of the base assembly 1 is partially used as a zoom coil, and the other part is used as an anti-shake coil. The zoom coil and the anti-shake coil are respectively arranged opposite to the magnet 4 to realize the zoom and anti-shake functions of the substrate 20.

[0082] The lens driving device of the present invention can also adopt other variations, for example, the carrier is relatively immobile, and other existing zoom structures are adopted to realize the zoom function, and the base assembly 1 is adopted to realize the anti-shake function. As long as the existing devices can cooperate with the base assembly 1 of the present invention to realize the zoom and / or anti-shake function, they can be combined to form the lens driving device, and are not limited to the embodiments 1 and 2 of the present invention.

[0083] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may 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 assembly, characterized in that: The base assembly includes a base, a reset mechanism and a base plate, the base has a base inner cavity with an open top, the base plate is movably installed in the base inner cavity through the reset mechanism, the reset mechanism includes a lower spring leaf, an upper spring leaf and a frame, the lower spring leaf is connected between the base and the frame, and the upper spring leaf is connected between the frame and the base plate; The substrate is provided with a coil group for cooperating with the magnet group. When the coil group is energized, it cooperates with the magnet group to drive the substrate to move at least along a plane perpendicular to the optical axis. The base assembly further includes a circuit board, which is disposed on the base and supplies power to the coil assembly on the substrate; The circuit board includes a circuit connection part, a circuit board outer ring and a circuit board inner ring connected in sequence, the circuit connection part is connected to the base outside the inner cavity of the base, the circuit board outer ring is suspended around the outside of the frame, and the circuit board inner ring is connected to the top of the upper spring sheet at the top of the substrate.

2. The base assembly according to claim 1, wherein: The base plate is located inside the frame, and the upper spring sheet is connected between the top end of the frame and the top end of the base plate.

3. The base assembly according to claim 2, wherein: The upper spring sheet comprises an upper spring sheet outer ring and an upper spring sheet inner ring, both of which are frame-shaped structures. The upper spring sheet inner ring is connected to the inner side of the upper spring sheet outer ring, the upper spring sheet outer ring is connected to the top of the frame, and the upper spring sheet inner ring is connected to the top of the substrate.

4. The base assembly according to claim 1, wherein: Support parts are respectively arranged on two opposite sides of the inner cavity of the base along a first direction, wherein the first direction is perpendicular to the optical axis direction; Two pairs of bottom ends on the lower spring sheet in the first direction are respectively connected to the two support portions.

5. The base assembly according to claim 1, wherein: The upper spring sheet comprises an upper spring sheet outer ring and an upper spring sheet inner ring, both of which are frame-shaped structures. The upper spring sheet inner ring is connected to the inner side of the upper spring sheet outer ring. The inner sides of two opposite sides of the upper spring sheet outer ring in the first direction are connected to the outer sides of two opposite sides of the upper spring sheet inner ring in the first direction. One or more upper spring sheet through holes are arranged on two opposite sides of the upper spring sheet outer ring in the first direction. The bottom ends of two opposite sides of the upper spring sheet outer ring in the second direction are connected to the top of the frame, and the bottom end of the upper spring sheet inner ring is connected to the outer side of the top of the substrate. Wherein, the first direction is perpendicular to the optical axis direction, and the second direction is perpendicular to the first direction and the optical axis direction respectively; And / or, the lower spring sheet is a rectangular frame structure, the top ends of two opposite sides of the lower spring sheet in the first direction are respectively connected to the bottom end of the frame, one or more lower spring sheet through holes are arranged on two opposite sides of the lower spring sheet in the second direction, and frame connecting parts are arranged on the inner sides of the two opposite sides of the lower spring sheet in the second direction, and the top ends of the frame connecting parts are connected to the bottom end of the frame; The first direction is perpendicular to the optical axis direction, and the second direction is perpendicular to the first direction and the optical axis direction respectively.

6. The base assembly according to claim 1, wherein: A sensor installation opening is arranged in the middle of the substrate, and the base assembly further comprises an image sensor, which is installed in the sensor installation opening.

7. The base assembly according to any one of claims 1 to 6, characterized in that: The base assembly also includes a movable seat, which is mounted on the upper end of the base plate, the coil group is mounted on the top of the movable seat, and a light avoidance opening is arranged in the middle of the movable seat.

8. The base assembly according to claim 1, wherein: The circuit board is an FPC board; And / or, the connection portion between the circuit connection portion and the outer ring of the circuit board passes through a base avoidance opening on the base, and the base avoidance opening communicates with the inside and outside of the base inner cavity; The connection portion between the top end of the outer ring of the circuit board and the inner ring of the circuit board passes through a frame avoidance groove on the frame, and the frame avoidance groove communicates with the inside and outside of the frame.

9. The base assembly according to claim 7, wherein: The coil group has four coils, and the four coils are arranged around the light avoidance opening; And / or, the movable seat is located above the inner cavity of the base.

10. A lens driving device, characterized in that: The lens driving device comprises the base assembly according to any one of claims 1 to 9.

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