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 substrate, the substrate is movably installed in an inner cavity of the base through the reset mechanism, the reset mechanism adopts a reed, the reed is provided with a reed outer ring, one or more reed middle rings and a reed inner ring, the reed outer ring is connected with the inner cavity of the base, the reed middle rings are suspended in the inner cavity of the base, and the reed inner ring is connected with the reed outer ring. And the reed inner ring is connected with the substrate on the inner side. And when the coil group is electrified, the coil group is matched with the magnet group to drive the substrate to move at least along a plane vertical 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. In addition, a reed of a three-layer structure is used as a reset mechanism, so that the reset effect of the moving reset operation of the substrate in the optical axis direction, the first direction and the second direction is good.

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 an inner base cavity with an open top, the base plate being movably mounted in the inner base cavity through the reset mechanism, the reset mechanism using a multi-layered spring, the spring having a spring outer ring, one or more spring middle rings and a spring inner ring connected in sequence from outside to inside, the spring outer ring being connected to the inner base cavity, the spring middle ring being suspended in the inner base cavity, and the spring inner ring being connected to the inner 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.

[0007] Optionally, a substrate movement avoidance opening communicating with the inside and outside is provided in the middle of the inner cavity of the base, and the substrate movement avoidance opening is located below the substrate.

[0008] 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 first direction of the outer ring of the leaf spring are respectively connected to the two support portions.

[0009] Optionally, a substrate accommodating groove is excavated on the outer side of the top end of the substrate, and the reed inner ring is installed in the substrate accommodating groove.

[0010] Optionally, a connection position of one layer of the reed sheet with the outer layer and a connection position of the inner layer are staggered, so that the layers of the reed sheet are staggeredly connected.

[0011] Optionally, a reed through hole is provided on the side with a connection position in the reed outer ring, and a reed through hole is also provided on one or several of the reed middle rings. The reed through holes on the reed middle ring are arranged on the side away from the reed through holes on its outer layer, so that the reed through holes on each layer of the reed are also staggered and connected.

[0012] Optionally, the side of the reed outer ring away from the connection position is connected to the inner cavity of the base.

[0013] Optionally, each layer of the reed is a rectangular frame structure, and the reed has a reed outer ring, a reed middle ring and a reed inner ring which are sequentially connected from the outside to the inside; The outer sides of the two opposite sides of the inner ring of the reed in the first direction are connected to the inner sides of the two opposite sides of the middle ring of the reed in the first direction, and the outer sides of the two opposite sides of the middle ring of the reed in the second direction are connected to the inner sides of the two opposite sides of the outer ring of the reed in the second direction; The bottoms of two opposite sides of the outer ring of the reed in the first direction are connected to the inner cavity of the base, and the inner ring of the reed is connected to the outer side of the top of the base plate; 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.

[0014] 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.

[0015] Optionally, the circuit board is an FPC board.

[0016] Optionally, the circuit board comprises 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 outer side of the reed, and the circuit board inner ring is connected to the top of the reed inner ring; The bottom end of the outer ring of the circuit board is connected to the inner ring of the circuit board. The connection part between the circuit connection part and the bottom end of the outer ring of the circuit board passes through the base avoidance opening on the base, and the base avoidance opening communicates with the inside and outside of the base inner cavity.

[0017] 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.

[0018] Optionally, the coil group has four coils, and the four coils are arranged around the light avoidance opening.

[0019] Optionally, the movable seat is located in the inner cavity of the base.

[0020] 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.

[0021] A lens driving device comprises the base assembly provided by the present invention.

[0022] 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.

[0023] The present invention also uses a three-layer spring as a reset mechanism, so that the substrate can be moved and reset in the optical axis direction, the first direction and the second direction, and the reset effect is good.

[0024] 2. In the present invention, the three-layer structure of the reed is designed inside and outside. Compared with the design of the upper and lower reeds with a height-lifting effect, the height of the reed is reduced, and the position of the base plate becomes lower accordingly. Therefore, a base plate movement avoidance opening is set at the center of the base to leave space for the base plate to move.

[0025] 3. The circuit board of the present invention has an outer circuit board ring and an inner circuit board ring, which can not only provide power for the image sensor and the coil assembly, but also, due to this reasonable design, the circuit board has a certain elastic potential energy, which can assist in resetting the substrate and the movable seat.

[0026] In addition, as the height of the substrate becomes lower, the outer ring of the circuit board forms an inner ring of the circuit board through the bottom end of one side toward the center position, that is, the bottom end of the outer ring of the circuit board is connected to the inner ring of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 7 An exploded view of the positional relationship between the substrate, the reset mechanism and the image sensor of the present invention; Figure 8 The figure is an exploded view of the structure of the lens driving device of the present invention. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Reference Figures 1 to 7 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.

[0034] The base assembly 1 comprises a base 10, a reset mechanism and a base plate 20. The reset mechanism adopts a multi-layered spring, which comprises a spring outer ring 30, one or more spring middle rings 40 and a spring inner ring 50 connected in sequence from outside to inside.

[0035] 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 outer ring 30 of the reed is connected to the inner cavity of the base, the middle ring 40 of the reed is suspended in the inner cavity of the base, and the inner ring 50 of the reed is connected to the inner base plate 20.

[0036] A coil group for cooperating with the magnet group is arranged on the substrate 20. 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In one embodiment, referring to Figure 3 A substrate movement avoidance opening 11 communicating with the inside and outside of the base cavity is provided in the middle of the base cavity, and the substrate movement avoidance opening 11 is located below the substrate 20 .

[0044] In the present invention, the three-layer structure of the reed is designed inside and outside, and compared with the design of the upper and lower reeds with a height-raising effect, the height of the reed is reduced, and the position of the base plate 20 becomes lower accordingly. Therefore, a base plate movement avoidance opening 11 is set at the center of the base 10 to leave space for the base plate 20 to move.

[0045] Of course, a protrusion device for lifting the spring sheet may also be provided in the inner cavity of the base, so that the substrate 20 is lifted to a point where it will not abut against the bottom of the inner cavity of the base even if the substrate 20 moves. In this case, the substrate movement avoidance opening 11 may not be provided.

[0046] In one embodiment, referring to Figure 5 Support parts 12 are respectively arranged on two opposite sides of the inner cavity of the base along the first direction.

[0047] Two pairs of bottom ends of the spring outer ring 30 in the first direction are connected to the two support portions 12 respectively.

[0048] In one embodiment, referring to Figure 3 and Figure 7 A circle of substrate accommodating groove 21 is dug on the outer side of the top of the substrate 20, and the reed inner ring 50 is installed in the substrate accommodating groove 21.

[0049] In one embodiment, the connection position of one layer in the reed with the outer layer and the connection position with the inner layer are staggered, so that the layers in the reed are staggeredly connected.

[0050] For example, when each layer in the spring sheet is a rectangular frame structure, when the connection position of one layer with the outer layer is in the first direction, the connection position of the layer with the inner layer is in the second direction. Preferably, when the connection position of one layer with the outer layer is on two opposite sides in the first direction, the connection position with the inner layer is on two opposite sides in the second direction. More preferably, when the connection position of one layer with the outer layer is in the middle of two opposite sides in the first direction, the connection position of the layer with the inner layer is in the middle of two opposite sides in the second direction. Of course, the above positional relationships can also be reversed.

[0051] Reference Figure 7 Taking the reed middle ring 40 as an example, the connection position 40a of the reed middle ring 40 and the outer reed outer ring 30 is located in the middle of two opposite sides in the second direction, and the connection position 40b of the reed middle ring 40 and the inner reed inner ring 50 is located in the middle of two opposite sides in the first direction.

[0052] In one embodiment, referring to Figure 7 A reed through hole is provided on the side with a connection position in the reed outer ring 30, and the reed through hole on the reed outer ring 30 is defined as an outer ring reed through hole 31. One or more reed middle rings 40 are provided with a reed through hole, and the reed through hole on the reed middle ring 40 is defined as a middle ring reed through hole 41. The middle ring reed through hole 41 is arranged on the side away from the reed through hole on its outer layer, so that the reed through holes on each layer of the reed are also staggered and connected.

[0053] If the reed ring 40 has two or more, such as Figure 7 The inner side of the reed middle ring 40 is also provided with one or more reed middle rings. Figure 7 The reed through holes 41 of the reed middle ring 40 are arranged on two opposite sides in the first direction, so the reed through holes on another reed middle ring 40 adjacent to the inner side of the reed middle ring 40 are arranged on two opposite sides in the second direction, and so on. The reed through holes on two adjacent layers are respectively located in the first direction and the second direction.

[0054] In this embodiment, no reed through hole is provided on the reed inner ring 50, so that the bottom ends of the reed inner ring 50 are fixedly connected to the base plate 20, and the connection between the two is stable.

[0055] During specific implementation, the length direction of each spring through hole is consistent with the length direction of the side where it is located.

[0056] In one embodiment, the side of the reed outer ring 30 away from the connection position is connected to the inner cavity of the base.

[0057] In one embodiment, referring to Figure 6 and Figure 7Each layer of the reed is a rectangular frame structure. The reed has a reed outer ring 30, a reed middle ring 40 and a reed inner ring 50 connected in sequence from the outside to the inside. The outer sides of the two opposite sides of the reed inner ring 50 in the first direction are connected to the inner sides of the two opposite sides of the reed middle ring 40 in the first direction, and the outer sides of the two opposite sides of the reed middle ring 40 in the second direction are connected to the inner sides of the two opposite sides of the reed outer ring 30 in the second direction. The bottoms of the two opposite sides of the reed outer ring 30 in the first direction are connected to the inner cavity of the base, and the reed inner ring 50 is connected to the outer side of the top of the substrate 20.

[0058] Preferably, the outer middle parts of two opposite sides in the first direction of the reed inner ring 50 are connected to the inner middle parts of two opposite sides in the first direction of the reed middle ring 40, and the outer middle parts of two opposite sides in the second direction of the reed middle ring 40 are connected to the inner middle parts of two opposite sides in the second direction of the reed outer ring 30.

[0059] Preferably, outer ring reed through holes 31 are provided on two opposite sides of the reed outer ring 30 in the second direction, and middle ring reed through holes 41 are provided on two opposite sides of the reed middle ring 40 in the first direction.

[0060] Preferably, the length direction of the outer ring spring through hole 31 is the first direction, and the length direction of the middle ring spring through hole 41 is the second direction.

[0061] Preferably, there are two outer ring spring through holes 31, which are arranged side by side along the first direction. There are two middle ring spring through holes 41, which are arranged side by side along the second direction.

[0062] 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 .

[0063] 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 .

[0064] In one embodiment, the circuit board 70 is a FPC board.

[0065] 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 which are 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 is suspended above the outer side of the spring. The circuit board inner ring 73 is connected to the top of the spring inner ring 50 at the top of the substrate 20.

[0066] The bottom end of the circuit board outer ring 72 is connected to the circuit board inner ring 73. The connection portion between the circuit connection portion 71 and the bottom end of the circuit board outer ring 72 passes through the base avoidance opening 13 on the base 10, and the base avoidance opening 13 communicates with the inside and outside of the base cavity.

[0067] 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 13 and enters the inner cavity of the base and is connected to the outer ring 72 of the circuit board. The outer ring 72 of the circuit board is suspended around the outer side of the spring and extends from the bottom end of one side to connect with the inner ring 73 of the circuit board 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 outer ring 72 of the circuit board and the inner ring 73 of the circuit board, which can assist in the reset of the substrate 20.

[0068] Since there is no obstruction between the circuit board outer ring 72 and the circuit board inner ring 73 and there is no need to pass through other components, there is no need to set up avoidance openings for other components to avoid.

[0069] In addition, as the height of the substrate becomes lower, the circuit board outer ring 72 forms the circuit board inner ring 73 from the bottom end of one side to the center position, that is, the bottom end of the circuit board outer ring 72 is connected to the circuit board inner ring 73.

[0070] In specific implementation, it is preferred that the inner middle part of the circuit connection part 71 is connected to the bottom middle part of one side of the circuit board outer ring 72, and the bottom middle part on the opposite side of the circuit board outer ring 72 is connected to the outer middle part of one side of the circuit board inner ring 73.

[0071] In a specific implementation, when a circle of substrate accommodating grooves 21 are arranged on the outer side of the top end of the substrate 20 , the spring inner ring 50 and the circuit board inner ring 73 are both installed in the substrate accommodating grooves 21 .

[0072] In one embodiment, the circuit board outer ring 72 and the circuit board inner ring 73 both adopt a rectangular frame structure.

[0073] In one embodiment, referring to Figures 1 to 5 The base assembly 1 also includes a movable seat 80, which is installed on the upper end of the substrate 20, and the coil group is installed 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.

[0074] 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.

[0075] In one embodiment, the movable seat 80 has a hollow rectangular structure in cross section.

[0076] In one embodiment, referring to Figure 1, Figure 2 , Figure 4 and Figure 5 The coil assembly includes four coils 60 , and the four coils 60 are arranged around the light avoidance opening 81 .

[0077] In one embodiment, referring to Figure 3 , the movable seat 80 is located in the inner cavity of the base.

[0078] Preferably, the movable seat 80 is located inside the outer ring 72 of the circuit board.

[0079] In one embodiment, referring to Figures 1 to 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.

[0080] 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.

[0081] In one embodiment, the substrate 20 is a substrate having a hollow rectangular structure in cross section.

[0082] 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.

[0083] Embodiment 1:

[0084] Reference Figure 8 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] Embodiment 2:

[0092] 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.

[0093] 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.

[0094] 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 adopts a multi-layered spring, the spring has a spring outer ring, one or more spring middle rings and a spring inner ring connected in sequence from outside to inside, the spring outer ring is connected to the base inner cavity, the spring middle ring is suspended in the base inner cavity, and the spring inner ring is connected to the inner 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.

2. The base assembly according to claim 1, wherein: A substrate movement avoidance opening communicating with the inside and outside is arranged in the middle of the inner cavity of the base, and the substrate movement avoidance opening is located below the substrate.

3. 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 direction of the optical axis; the bottom ends of the two opposite sides of the outer ring of the spring in the first direction are respectively connected to the two support parts; And / or, a substrate receiving groove is dug on the outer side of the top end of the substrate, and the reed inner ring is installed in the substrate receiving groove; And / or, the connection position of one layer in the reed sheet with the outer layer and the connection position with the inner layer are staggered, so that the layers in the reed sheet are staggeredly connected.

4. The base assembly according to claim 3, characterized in that: The side with the connection position in the outer ring of the reed is provided with a reed through hole, and one or more of the middle rings of the reed are also provided with a reed through hole, and the reed through holes on the middle ring of the reed are arranged on the side away from the reed through holes on the outer layer, so that the reed through holes on each layer of the reed are also staggered and connected; The side of the outer ring of the spring sheet away from the connection position is connected to the inner cavity of the base.

5. The base assembly according to claim 1, wherein: Each layer of the reed is a rectangular frame structure, and the reed has an outer reed ring, a middle reed ring and an inner reed ring connected in sequence from the outside to the inside; The outer sides of the two opposite sides of the inner ring of the reed in the first direction are connected to the inner sides of the two opposite sides of the middle ring of the reed in the first direction, and the outer sides of the two opposite sides of the middle ring of the reed in the second direction are connected to the inner sides of the two opposite sides of the outer ring of the reed in the second direction; The bottoms of two opposite sides of the outer ring of the reed in the first direction are connected to the inner cavity of the base, and the inner ring of the reed is connected to the outer side of the top of the base plate; 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 further includes a circuit board, which is disposed on the base and supplies power to the coil assembly on the substrate; And / or, the base assembly further comprises 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 arranged in the middle of the movable seat.

8. The base assembly according to claim 7, wherein: The circuit board is an FPC board; And / or, the circuit board comprises 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 outer side of the reed, and the circuit board inner ring is connected to the top of the reed inner ring; The bottom end of the outer ring of the circuit board is connected to the inner ring of the circuit board, and the connection part between the circuit connection part and the bottom end of the outer ring of the circuit board passes through the base avoidance opening on the base, and the base avoidance opening connects the inside and outside of the base inner cavity.

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 in 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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