CN111123466A

CN111123466A - Lens driving mechanism

Info

Publication number: CN111123466A
Application number: CN202010113008.4A
Authority: CN
Inventors: 汪仁德; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Haoze Electronics Co ltd Kunshan Branch
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-05-08

Abstract

The invention discloses a lens driving mechanism which comprises a shell, an upper reed, a frame, a magnet group, a carrier, a suspension wire, an electric power plate, a circuit board and a base, wherein the upper reed, the frame, the magnet group, the carrier, the suspension wire, the electric power plate and the circuit board are arranged in a space defined by the shell and the base. The upper surface of the frame is provided with a frame upper limit part, the side part of the frame is provided with a frame side limit part, the upper surface of the carrier is provided with a carrier upper limit part, and the side surface of the carrier is provided with a carrier side limit part to prevent the carrier and the frame from directly contacting with the shell when moving in the shell. The lens driving mechanism can avoid the direct contact between the carrier or the frame and the shell in the operation process, thereby better protecting the lens driving mechanism.

Description

Lens driving mechanism

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to a lens driving mechanism.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have a function of taking pictures or recording videos. The use of these electronic devices is becoming more common and the design direction of these electronic devices is being developed to be more convenient and thinner to provide more choices for users.

Some electronic devices with a camera or video recording function are provided with a lens driving module to drive an Optical component such as a lens to move, so as to achieve the functions of auto focus (auto focus) and Optical Image Stabilization (OIS). The light can pass through the optical component to form an image on a photosensitive component.

However, the carrier and the frame of the current lens driving module are easily collided with the housing, causing damage to the carrier and the frame to various degrees. In addition, base processing is comparatively difficult, and whole drive module's volume is handed over greatly usually, and at the more and more miniaturized of smart machine today, the improvement to lens drive module makes it occupy littleer volume still be convenient for process simultaneously and is a problem that awaits the solution urgently.

Disclosure of Invention

It is an object of the present invention to provide a lens driving mechanism to solve the above-mentioned problems in the prior art.

In order to solve the above-mentioned problems, according to an aspect of the present invention, there is provided a lens driving mechanism including a housing, an upper spring, a frame, a magnet group, a carrier, a suspension, a power pad, a circuit board, and a base, the upper spring, the frame, the magnet group, the carrier, the suspension, the power pad, and the circuit board being mounted in a space defined by the housing and the base, wherein the upper spring, the frame, the magnet group, the carrier, the suspension, the power pad, and the circuit board are mounted in the space defined by

The upper end of the suspension wire is fixedly connected with the upper spring plate, the lower end of the suspension wire is fixedly connected with the circuit board,

the magnet group is arranged on the frame, the carrier is used for mounting a lens and is wound with a carrier coil, the coil is matched with the magnet group to drive the carrier to move along the optical axis direction when the carrier is electrified,

a bottom coil is arranged on the power board and is matched with the magnet group from the lower part of the magnet group so as to drive the carrier to move along the X-axis direction and the Y-axis direction which are perpendicular to each other when electrified, wherein the X-axis and the Y-axis are perpendicular to the optical axis direction, and

the upper surface of the frame is provided with a frame upper limit part, the side part of the frame is provided with a frame side limit part, the upper surface of the carrier is provided with a carrier upper limit part, and the side surface of the carrier is provided with a carrier side limit part so as to prevent the carrier and the frame from directly contacting with the shell when moving in the shell.

In one embodiment, the frame forms a rectangular frame main body, a plurality of frame side positioning portions are provided on an outer peripheral surface of the rectangular frame main body, a plurality of frame upper positioning portions are provided on an upper surface of the rectangular frame main body, and upper spring positioning posts are further provided at four corners of the upper surface to be fitted with positioning holes at four corners of the upper spring.

In one embodiment, four side walls inside the frame are respectively provided with a frame magnet groove, and the frame magnet grooves are opened towards the lower part of the frame, so that the magnet groups can be installed in the frame magnet grooves from bottom to top.

In one embodiment, four corners of the lower surface of the frame are further provided with lower spring positioning columns to be matched with positioning holes of the four corners of the lower spring so as to fix the four corners of the lower spring to the frame.

In one embodiment, the base is provided with positioning columns, the power board is provided with positioning holes, and the positioning holes are aligned with the positioning holes on the circuit board and matched with the positioning columns on the base, so that the power board and the circuit board are fixed on the base.

In one embodiment, suspension wire avoiding notches are further arranged at four corners of the power board so as to avoid the suspension wires, so that the lower ends of the suspension wires are connected to the circuit board.

In one embodiment, the bottom of the circuit board is provided with a first sensor and a second sensor, and the first sensor and the second sensor are matched with two adjacent magnets mounted on the frame so as to obtain the offset displacement of the lens on the X axis and the Y axis which are perpendicular to each other by detecting the position change of the magnet group.

In one embodiment, the bottom coil is provided with four ports, and the circuit board is provided with four bottom coil connecting portions, which are arranged around the central opening of the circuit board.

In one embodiment, the circuit board is provided with a central opening in the middle and suspension wire connecting holes at four corners, wherein the suspension wire connecting holes at two corners are conducted with the current input end of the circuit board, so that current is sequentially transmitted to the upper spring and the carrier coil through the suspension wires.

In one embodiment, the bottom coil is provided with four ports, and four bottom coil connections are provided around the central opening of the circuit board, the four bottom coil connections being in electrical communication with the four ports of the bottom coil and with the current input of the circuit board via wires, respectively, to conduct current to the bottom coil.

In one embodiment, the upper spring is composed of a first part and a second part, the first part and the second part are symmetrically arranged and provided with an opening matched with a lens in the middle, an inner ring and an outer ring are formed around the opening, the inner ring is fixedly connected to the carrier, the outer ring is fixedly connected to the frame, and the inner ring and the outer ring are connected through an elastic strip, so that the carrier can move relative to the frame.

In one embodiment, the inner ring is provided with a carrier fixing hole, the carrier is provided with a carrier positioning column, and the carrier fixing hole is matched with the carrier positioning column to fixedly connect the inner ring of the upper reed and the carrier.

In one embodiment, the main parts of the outer ring are located at four corners of the upper spring and are connected with the inner ring through elastic strips, wherein the elastic strips are provided with at least one bending part to increase the elastic deformation capacity.

In one embodiment, each corner of the outer ring is provided with at least two frame connecting holes so as to enhance the connecting capacity with the frame.

In one embodiment, the outer ring is further provided with a suspension wire connecting part, and the suspension wire is fixed on the suspension wire connecting part.

In one embodiment, the ends of the first part and the second part of the upper spring sheet, which are located at the inner ring, are provided with connecting terminals, and the current is switched on through the connecting terminals.

In one embodiment, the lens driving mechanism further comprises a lower spring, the lower spring comprises a lower spring outer ring and a lower spring inner ring which are integrally formed, the lower spring outer ring is connected to the frame, and the lower spring inner ring is connected to the carrier.

In one embodiment, the lower spring inner ring is surrounded by a resilient strip in a circular configuration and is provided with four carrier attachment portions substantially equidistantly along the circumference, the carrier attachment portions being fixedly attached to the carrier so as to attach the lower spring to the carrier, and the lower spring outer ring is formed of four parts, each part protruding integrally from the carrier attachment portion to the side and being bent to form a frame attachment portion at the end, the frame being fixedly attached to the lower spring by the frame attachment portions.

In one embodiment, the frame connecting portion is formed with a frame connecting hole through which it is fixedly connected with a corresponding frame connecting post on the lower surface of the frame.

In one embodiment, the base comprises a rectangular plate main body, a central opening is formed in the middle of the rectangular plate main body and is matched with the lens, base notches are formed in four corners of the rectangular plate main body and are matched with power board notches on the power board, the suspension wires are avoided being opened, the lower ends of the suspension wires are connected to the circuit board, and the base notches are irregular in shape.

In one embodiment, the base notch includes a step portion, a vertical portion, an inclined portion, a horizontal bottom portion, and an arc portion.

In one embodiment, the base is provided with a plurality of grooves surrounding the central opening of the base, and the grooves are matched with the bottom coil connecting parts on the circuit board so as to facilitate processing of the bottom coil connecting parts.

In one embodiment, the upper surface of the base is further provided with a coil avoiding groove surrounding the central opening so as to avoid a bottom coil on the power board, wherein an arc-shaped structure is arranged on one side, close to the central opening of the base, of the coil avoiding groove, and the shape of the arc-shaped structure is matched with that of the corresponding position of the central opening.

In one embodiment, current is tapped from the circuit board and passed through the power pad to the bottom coil, and through the suspension wire to the upper spring, and then through the upper spring to the carrier coil.

According to the lens driving mechanism, the limiting parts are arranged on the frame and the carrier, so that the phenomenon that the carrier or the frame is in direct contact with the shell in the operation process is avoided, the lens driving mechanism is damaged, the capability of the lens driving mechanism adapting to the environment is stronger, and the service life of the whole mechanism is prolonged. In addition, through the unique base design, the occupied space of the base and the whole lens driving mechanism can be reduced, and the base is easy to process.

Drawings

FIG. 1 is an exploded perspective view of a lens actuation mechanism according to one embodiment of the present invention;

fig. 2 is a perspective view of a frame of the lens driving mechanism of fig. 1;

fig. 3 is a plan view of a frame of the lens driving mechanism;

fig. 4 is a bottom view of the frame of the lens driving mechanism;

FIG. 5 is an exploded perspective view of the power plate of the lens driving mechanism of FIG. 1;

fig. 6 is a perspective view of a circuit board of the lens driving mechanism of fig. 1;

fig. 7 is a perspective view of a base of the lens driving mechanism of fig. 1;

fig. 8 is a bottom view of a base of the lens driving mechanism of fig. 1;

fig. 9 is a top view of a base of the lens driving mechanism of fig. 1;

fig. 10 is a perspective view of an upper spring plate of the lens driving mechanism of fig. 1;

fig. 11 is a perspective view of a lower spring plate of the lens driving mechanism of fig. 1;

fig. 12 is a top view of an assembly in which a carrier, a frame, a magnet group, a lower spring plate, an electric power plate, and a circuit board of the lens driving mechanism of fig. 1 are assembled together;

FIG. 13 is a top view of the assembly of FIG. 12 with a further upper spring mounted thereon;

FIG. 14 is a bottom view of the lower spring in assembled relation with the frame and carrier; and

fig. 15 is a sectional view of the entire lens driving mechanism after assembly.

Detailed Description

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

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

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, the 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.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

Fig. 1 is an exploded perspective view of a bright lens driving mechanism (hereinafter, referred to as a lens driving mechanism), as shown in fig. 1, the lens driving mechanism includes a base 80, a circuit board 70, a power board 60, a suspension wire 41, a lower spring 20B, a carrier 50 wound with a coil, a magnet assembly 40, a frame 30, an upper spring 20A, and a housing 10. The carrier 50 has a hollow structure at the middle thereof for carrying a lens (not shown), and a carrier coil 51 is wound around the outer circumference of the carrier 50.

The magnet group 40 includes four magnets in total, and the four magnets are respectively installed in the frame magnet grooves 35 on the four inner side walls of the frame 30. The middle of the frame 30 forms a hollow structure, the carrier 50 is mounted in the hollow structure of the frame 30, and the magnet groups 40 are arranged around the carrier 30.

The lower spring 20B and the upper spring 20A are attached to the lower surface and the upper surface of the frame 30 and the carrier 50, respectively, and then the power board 60 and the circuit board 70 are sequentially disposed on the lower surface of the lower spring 20B. The lower ends of the suspension wires 41 are attached to the four corners of the wiring board 70, and the upper ends of the suspension wires 41 are connected to the upper leaf 20A through the carrier 50 and the frame 30. The base 80 is mounted below the circuit board 70 and cooperates with the housing 10 to enclose the entire assembly within the space defined by the housing 10 and the base 80.

Fig. 2 is a perspective view of the frame 30, fig. 3 is a top view of the frame 30, and fig. 4 is a bottom view of the frame 30. As shown in fig. 2 to 4, the frame 30 is formed integrally as a rectangular frame body, and is provided on the outer peripheral surface thereof with a plurality of side stoppers 31, an upper surface thereof with a plurality of upper stoppers 32, and upper reed positioning posts 33 at four corners of the upper surface to be fitted into the positioning holes at four corners of the upper reed 20A, thereby fixing the four corners of the upper reed 20A to the frame 30.

Referring to fig. 4, frame magnet grooves 35 are respectively formed on four side walls inside the frame 30, and the frame magnet grooves 35 are opened to the lower side of the frame 30, so that the magnet groups 41 can be mounted in the frame magnet grooves 35 from bottom to top. The four corners of the lower surface of the frame 30 are also provided with lower spring positioning posts 34 to engage with positioning holes of the four corners of the lower spring, thereby fixing the four corners of the lower spring to the frame 30.

Figure 5 is an exploded perspective view of the power pad 60. As shown in fig. 5, the bottom coil 62 is provided inside the power pad 60, and the bottom coil 62 is mounted inside the power pad 60 and finally integrated into an integrated assembly. Locating holes 61 are also provided in the power board 60, the locating holes 61 being aligned with locating holes in the circuit board 70 and cooperating with locating posts on the base 80 to secure the power board 60 and the circuit board 70 to the base 80. Suspension wire avoiding notches 63 are also provided at the four corners of the power board 60 to avoid the suspension wires 41 so that the lower ends of the suspension wires 41 are connected to the wiring board 70.

With continued reference to FIG. 5, the bottom coil 62 is provided with four

ports

62A, 62B, 62C and 62D, corresponding to which four

openings

64A, 64B, 64C and 64D are provided in the power pad 60. When the bottom coil 62 is mounted inside the power strip 60, the

ports

62A, 62B, 62C, and 62D are located at the positions of the

openings

64A, 64B, 64C, and 64D, respectively, so that the bottom coil 62 can be connected through the

openings

64A, 64B, 64C, and 64D and power is supplied to the bottom coil 62.

Fig. 6 is a perspective view of the wiring board 70. As shown in fig. 6, the central portion of the circuit board 70 is provided with a circuit board central opening 70A, four corners are provided with suspension wire connection holes 72, and the bottom portion of the circuit board 70 is provided with a first sensor 71A and a second sensor 71B, the first sensor 71A and the second sensor 71B are fitted with two adjacent magnets mounted on the frame 30 to calculate the offset displacement of the circuit board, the carrier, and the lens in the mutually perpendicular X axis and Y axis by detecting the position change of the magnet group.

With continued reference to fig. 6, the suspension wire connection holes located at the lower left corner and the upper right corner of fig. 6 are connected to the current input terminals of the circuit board through the first line 73 and the second line 74, respectively, so that the applied current can be sequentially transferred to the upper spring and the carrier coil through the suspension wire. Four bottom coil connections 75 are provided substantially equidistantly around the central opening 70A of the circuit board, the bottom coil connections 75 being in electrical communication with the current input of the circuit board via lines 76 on the one hand, and the bottom coil connections 75 being in conductive engagement with the four

ports

62A, 62B, 62C and 62D of the bottom coil 62, respectively, for conducting current to the bottom coil 62.

Fig. 7 is a perspective view of the base 80, fig. 8 is a plan view of the base 80, and fig. 9 is a bottom view of the base 80. as shown in fig. 7 to 9, the base 80 integrally includes a rectangular plate main body, a central opening 80A is formed in the middle of the rectangular plate main body to fit the lens, base notches 84 are formed at four corners of the rectangular plate main body to fit the notches 63 of the power board 60, and the suspension wires 41 are avoided so that the lower ends of the suspension wires 41 are connected to the circuit board 70. The base notch 84 in the upper right corner of fig. 7-8 is used as an example for the description of the base notch, and it should be understood by those skilled in the art that the shapes of the base notches 84 in the four corners are similar and will not be described herein again.

As shown in fig. 7-8, the base notch 84 is an irregular notch including a step portion 841, a vertical portion 842, an inclined portion 843, a horizontal bottom 844, and an arc portion 845. Through such setting, can make the mould easy to be maintained when injection moulding. Recesses 85 are provided around the four corners of the central opening 80A to mate with corresponding structures on the circuit board 70 to facilitate machining of corresponding locations on the circuit board 70. One pair of opposing sides of the base 80 are provided with downwardly extending baffles 86, the baffles 86 engaging the downwardly turned interface of the circuit board 70 and supporting the main portion of the base.

With continued reference to FIG. 9, the upper surface of the base 80 is shown. Three of the corners of the upper surface of the base 80 are provided with positioning posts 83 to engage with positioning holes on the power board 60 and the circuit board 70, thereby fixing the power board 60 and the circuit board 70 to the base 80. A coil avoidance slot 81 is also provided in the upper surface of the base 80 around the central opening 80A to avoid the bottom coil 62 on the power pad 60. Wherein the adjacent two sets of coil avoiding grooves 81 corresponding to the bottom sensors are shorter to leave the position setting sensor avoiding grooves 82. The sensor avoidance groove 82 aligns with the first and

second sensors

71A and 71B mounted on the bottom of the wiring board 70 to avoid the first and

second sensors

71A and 71B. After the circuit board 70 is mounted on the base 80, the first sensor 71A and the second sensor 71B are mounted with their front surfaces facing downward and are completely accommodated in the sensor avoiding groove 82, so that the area occupied by the power board is reduced and the height originally occupied by the power board is transferred to the base, thereby reducing the overall height. The middle part of one side of the coil avoiding groove 81 close to the central opening 80A is provided with an arc-shaped structure 811, and the shape of the arc-shaped structure 811 is matched with the shape of the corresponding position of the central opening 80A. Through the setting of this arc structure, can reduce the volume that the coil occupy to reduce the space that whole base occupy, make whole camera lens actuating mechanism structure compacter, weight is lighter. The base 80 is also provided with a plurality of stamped holes 87.

Fig. 10 is a perspective view of the upper spring piece 20A. As shown in fig. 10, the upper reed 20A is integrally composed of a first part 28A and a second part 29A, the first part 28A and the second part 29A are symmetrically arranged and provided with an opening in the middle for fitting with a lens, an inner ring 21A and an outer ring 22A are formed around the opening, the inner ring 21A is fixedly connected to the carrier 50, the outer ring 22A is fixedly connected to the frame 30, and the inner ring 21A and the outer ring 22A are connected by an elastic strip so that the carrier 50 can move relative to the frame 30 to realize an anti-shake function.

Specifically, the inner ring 21A is provided with a carrier fixing hole 23A, and the carrier fixing hole 23A is matched with the carrier positioning column 52 on the carrier 50 to fixedly connect the inner ring of the upper spring piece 20A with the carrier 50. Wherein the first portion 28A and the second portion 29A are each provided with two carrier fixing holes 23A.

The outer ring 22A is mainly located at four corners of the upper spring 20A, and is connected with the inner ring 21A through an elastic strip 27A, and at least one bending part is arranged on the elastic strip 27A to increase the elastic deformation capacity. The outer ring 22A is provided with frame attachment holes 24A, and the outer ring of each corner is provided with two frame attachment holes 24A to enhance the attachment to the frame 30. The outer ring 22A is further provided with a suspension wire connecting portion 25A, and the suspension wire 41 is fixed to the suspension wire connecting portion 25A. The ends of the first part 21A and the second part 22A, which are located at the inner circumference, are each provided with a connection 26A, through which connection 26A the current is taken in.

Fig. 11 is a perspective view of the lower spring 20B. As shown in FIG. 11, the lower spring 20B integrally includes an outer ring 21B and an inner ring 22B, the outer ring 21B is coupled to the frame 30, and the inner ring 22B is coupled to the carrier 50. Specifically, the inner ring 22B is surrounded by the elastic strips to form a circular structure and is provided with four carrier connecting portions 23B at substantially equal intervals along the circumference, and the carrier connecting portions 23B are fixedly connected with corresponding portions of the carrier so as to connect the lower spring pieces 20B to the carrier 50. The outer ring 21B is integrally composed of four parts, each of which is integrally extended from the carrier connecting portion 23B to the side portion and is bent to form a frame connecting portion at the end, and a frame connecting hole 24B is formed in the frame connecting portion and is fixedly connected to a corresponding frame connecting post on the lower surface of the frame through the frame connecting hole 24, thereby fixedly connecting the frame to the lower spring. And the carrier 50 can move relative to the frame 30 due to the elastic connection between the inner ring 22B and the outer ring 21B of the lower spring 20B to realize the optical anti-shake function.

Fig. 12 is a plan view of an assembly in which a carrier, a frame, a magnet group, a lower spring, an electric power board, and a circuit board are assembled, fig. 13 is a plan view of the assembly of fig. 12 to which an upper spring is further attached, fig. 14 is a bottom view of the lower spring, the frame, and the carrier after they are assembled, and fig. 15 is a sectional view of the entire lens driving mechanism after it is assembled. As shown in fig. 12-15, after the carrier 50 is assembled with the frame 30, the outer peripheral wall of the carrier 50 is engaged with the inner peripheral wall of the frame 30, so that the coils 51 wound on the carrier 50 correspond to the magnets 40 mounted on the inner wall of the frame 30 one by one, and when the coils 51 are energized, the carrier 50 can be driven to drive the lens to move along the optical axis direction, thereby implementing the auto zoom function.

As shown in fig. 13 in conjunction with fig. 10, the upper surface of the carrier 50 carries carrier positioning posts 52 and carrier upper positioning portions 53, the carrier positioning posts 52 are engaged with the carrier fixing holes 23A of the upper spring pieces 20A, the side of the carrier 50 is provided with carrier coil posts 54, and the carrier coil 51 is wound on the carrier coil posts 54. The lower surface of the carrier 50 is provided with a carrier lower spring positioning portion 55 to be fixedly connected with the lower spring, the side surface of the frame 30 is provided with a frame side stopper portion 31, and the upper surface of the frame 30 is provided with a frame upper stopper portion 33. The carrier upper stopper 53, the frame upper stopper 33, and the frame side stopper 31 prevent the carrier 50 or the frame 30 from directly contacting the housing and damaging the carrier 50 or the frame 30.

As shown in fig. 13, the suspension wire connection portions 25A at the four corners of the upper spring 20A are fixedly connected to the suspension wires 41, and at the outer turn, fixedly connected to the upper spring fixing posts 34 on the frame 30 through the frame connection holes 24A, while the inner turn of the upper spring 20A is fixedly connected to the carrier 50 by the carrier fixing holes 23A engaging with the carrier fixing posts 52 of the carrier 50, while the connection portions 26A on the upper spring 20A are aligned with the two carrier coil posts 54 on the carrier 50 for electrical communication, and since the outer turn and the inner turn of the upper spring 20A are connected by the elastic strips, the carrier 50 can move relative to the frame 30 in the plane perpendicular to the optical axis in the X-axis and the Y-axis perpendicular to each other.

As shown in fig. 14 and combined with fig. 11, the outer ring of the lower spring 20B and the frame are fixedly connected with the lower spring positioning column 34 of the frame through the frame connecting hole 24B, and the inner ring of the lower spring 20B and the carrier 50 are fixedly connected with the carrier lower spring positioning part 55 on the lower surface of the carrier 50 through the carrier connecting part 23B of the lower spring 20B. Similar to the upper spring 20A, the inner ring and the outer ring of the lower spring 20B are connected by an elastic structure, so that the carrier 50 can perform X-axis and Y-axis movements relative to the frame 30 in a plane perpendicular to the optical axis in cooperation with the upper spring 20A.

The upper end of the suspension wire 40 is fixedly connected with the upper spring plate 20A and is connected to the frame 10 through the upper spring plate 20A, and the lower end of the suspension wire 40 is connected to the circuit board 70 through the frame 50 and the power board 60. In operation, current is applied from the circuit board 70 and is transmitted to the bottom coil 62 through the power board 60, and is transmitted to the upper spring 20A through the suspension wires 40, and is transmitted to the carrier coil 51 through the upper spring 20A, the automatic zooming function is realized by adjusting the magnitude and direction of the current passing through the carrier coil, and the movement of the carrier 50 relative to the frame 30 along the X-axis and the Y-axis in the direction perpendicular to the optical axis is realized by adjusting the magnitude and direction of the current passing through the bottom coil, thereby realizing the optical anti-shake function.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. A lens driving mechanism is characterized by comprising a shell, an upper reed, a frame, a magnet group, a carrier, a suspension wire, a power plate, a circuit board and a base, wherein the upper reed, the frame, the magnet group, the carrier, the suspension wire, the power plate and the circuit board are arranged in a space defined by the shell and the base, and the lens driving mechanism is characterized in that the lens driving mechanism comprises the shell, the upper reed, the frame, the magnet group, the carrier, the suspension wire, the power plate and the circuit

2. The lens driving mechanism according to claim 1, wherein the frame forms a rectangular frame main body, and a plurality of the frame side stoppers are provided on an outer peripheral surface of the rectangular frame main body, a plurality of the frame upper stoppers are provided on an upper surface of the rectangular frame main body, and upper spring positioning posts are further provided at four corners of the upper surface to be fitted with positioning holes at four corners of the upper spring.

3. The lens driving mechanism according to claim 1, wherein a first sensor and a second sensor are provided at a bottom of the circuit board, the first sensor and the second sensor are engaged with two adjacent magnets mounted on the frame to obtain an offset displacement of the lens on an X axis and a Y axis perpendicular to each other by detecting a change in position of the magnet group, wherein a sensor avoiding groove is provided on an upper surface of the base, and the first sensor and the second sensor are accommodated in the sensor avoiding groove after the circuit board is mounted on the base.

4. A lens driving mechanism according to claim 3, wherein the bottom coil is provided with four ports, and the circuit board is provided with four bottom coil connecting portions, the four bottom coil connecting portions being provided around the central opening of the circuit board.

5. A lens driving mechanism according to claim 1, wherein the upper spring is composed of a first part and a second part, the first part and the second part are symmetrically arranged and provided with an opening therebetween for engaging with the lens, an inner ring and an outer ring are formed around the opening, the inner ring is fixedly connected to the carrier, the outer ring is fixedly connected to the frame, and the inner ring and the outer ring are connected by an elastic strip so that the carrier can move relative to the frame.

6. The lens driving mechanism according to claim 1, further comprising a lower spring including a lower spring outer ring and a lower spring inner ring which are integrally formed, the lower spring outer ring being attached to the frame, the lower spring inner ring being attached to the carrier.

7. The lens driving mechanism according to claim 1, wherein the base includes a rectangular plate body, a central opening is formed in a central portion of the rectangular plate body to fit the lens, base notches are formed at four corners of the rectangular plate body to fit power pad notches formed in the power pad, and the suspension wire is prevented from being opened so that a lower end of the suspension wire is connected to the circuit board, wherein the base notches have an irregular shape.

8. The lens driving mechanism according to claim 7, wherein the base notch includes a step portion, a vertical portion, an inclined portion, a horizontal bottom portion, and an arc portion.

9. The lens driving mechanism as claimed in claim 7, wherein the base has a plurality of grooves around a central opening of the base, the plurality of grooves cooperating with the bottom coil connecting portion on the circuit board to facilitate processing of the bottom coil connecting portion.

10. The lens driving mechanism as claimed in claim 1, wherein the upper surface of the base further has a coil avoiding groove around the central opening to avoid a bottom coil on the power board, wherein an arc-shaped structure is disposed on a side of the coil avoiding groove close to the central opening of the base, and a shape of the arc-shaped structure matches a shape of a corresponding position of the central opening. In one embodiment, current is tapped from the circuit board and passed through the power pad to the bottom coil, and through the suspension wire to the upper spring, and then through the upper spring to the carrier coil.