CN116520524A

CN116520524A - Lens driving mechanism

Info

Publication number: CN116520524A
Application number: CN202310334014.6A
Authority: CN
Inventors: 请求不公布姓名; 吴可中; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-08-01

Abstract

The invention discloses a lens driving mechanism, which is used for driving a lens to move and comprises a bottom plate, a circuit board, a frame, a carrier, a reset piece and a plurality of suspension wires, wherein the bottom plate extends along the radial direction; the circuit board covers and is connected to the top surface of the bottom plate, and is provided with a first group of coils; the frame is suspended above the circuit board and is provided with a first group of magnets and a second group of magnets, the first group of magnets comprise a plurality of first magnets, and the first magnets are matched with the first group of coils to drive the frame to move along the radial direction. The second group of magnets comprises a plurality of second magnets, and the sizes of the second magnets along the optical axis direction are respectively larger than the sizes of the first magnets along the optical axis direction; the carrier is arranged in the frame; the carrier is provided with a second group of coils; the reset piece is connected with the frame and the carrier respectively and is used for driving the carrier to reset. The first group of magnets and the second group of magnets have reduced overall size and weight, are more beneficial to the movement of the frame, and can improve the weight reduction of the lens driving mechanism.

Description

Lens driving mechanism

Technical Field

The present invention relates to the field of optical imaging devices, and in particular, to a lens driving mechanism.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user.

Some electronic devices with photographing or video recording function are provided with a lens driving device to drive the optical components of the lens to move, so as to achieve the functions of automatic focusing and optical hand shake prevention.

Among the prior art, lens drive arrangement includes the bottom plate, is located the frame of bottom plate top and is used for installing the carrier of camera lens, and wherein, the frame is equipped with a plurality of magnetite group, and a plurality of magnetite group are used for cooperating and then drive carrier and frame motion with the coil of carrier and the coil of bottom plate to adjust camera lens focus and prevent camera lens shake. In the prior art, in order to meet the motion force of the driving carrier and the frame, a plurality of magnet sets with larger volume are needed to improve the magnetic flux of the magnet sets penetrating through the coil, which clearly increases the weight of the whole lens driving mechanism and cannot meet the light-weight requirement of the market on the lens driving mechanism.

Disclosure of Invention

The present invention is directed to a lens driving mechanism to solve the above-mentioned problems.

In order to solve the above technical problems, the present invention provides a lens driving mechanism for driving a lens to move, including:

the bottom plate extends along the radial direction, and the radial direction is perpendicular to the optical axis direction of the lens;

the circuit board covers and is connected to the top surface of the bottom plate, and a first group of coils are arranged in the circuit board;

the frame, the frame is for around the annular of optical axis direction extension just unsettled in the top of circuit board, the frame is equipped with:

a first set of magnets including a plurality of first magnets arranged around a circumference of the frame, the first magnets being located above the first set of coils and cooperating with the first set of coils to drive the frame to move in a radial direction; and

a second group of magnets including a plurality of second magnets arranged around a circumference of the frame, and a size of the plurality of second magnets in the optical axis direction being larger than a size of the plurality of first magnets in the optical axis direction, respectively, and being aligned with the plurality of first magnets, respectively, in a radial direction;

the carrier is movably arranged in the frame and is used for mounting the lens; the carrier is provided with a second group of coils, and the second group of coils are matched with the second group of magnets to drive the carrier to move along the optical axis direction;

the resetting piece is respectively connected with the frame and the carrier and is used for driving the carrier to reset; and

the top ends of the suspension wires are connected with the reset piece, and the bottom ends of the suspension wires extend beyond the bottom of the frame along the optical axis direction and are connected with the bottom plate.

In one embodiment, the plurality of first magnets are attracted to the plurality of second magnets respectively and are located radially outward of the plurality of second magnets.

In one embodiment, the bottom surfaces of the plurality of first magnets are flush with the bottom surfaces of the plurality of second magnets.

In one embodiment, the frame is rectangular and annular, and four corners are respectively provided with a mounting groove, and the four mounting grooves are respectively formed by sinking from the bottom surface of the frame along the optical axis direction; the four first magnets and the four second magnets are respectively positioned in the four mounting grooves, and the bottom surfaces of the first magnets and the bottom surfaces of the second magnets extend beyond the bottom surface of the frame and are arranged at intervals with the circuit board.

In one embodiment, the second set of coils is wound to the radial outer side of the carrier, and a plurality of protruding limit protrusions are arranged on the radial outer side of the carrier, and a plurality of limit protrusions are positioned at the bottom of the carrier; the radial inner surface of the frame is provided with a plurality of limit grooves, and a plurality of limit grooves are respectively formed by the bottom surface of the frame in a concave manner and accommodate a plurality of limit protrusions.

In one embodiment, four limit grooves are respectively located at four sides of the frame, and four limit protrusions are respectively located in four limit grooves.

In one embodiment, a built-in circuit is arranged in the bottom plate and is electrically connected with the circuit board;

the reset piece includes:

a first reed which is electrically conductive and elastic, is positioned on the top of the frame and the carrier, is connected with the frame and the carrier, and is electrically connected with the second group of coils; and

a second reed which has elasticity and is positioned at the bottoms of the frame and the carrier and is connected with the frame and the carrier;

the suspension wire is electrically conductive and electrically connected to the first reed and the built-in circuit.

In one embodiment, the lens further comprises an aperture adjusting component, wherein the aperture adjusting component is located above the first reed and is used for adjusting the aperture of the lens.

In one embodiment, the lens adjusting device further comprises a shell, the shell wraps the frame and the reset piece, the bottom of the shell is connected with the bottom plate, an avoidance hole and an avoidance groove are formed in the top of the shell, the avoidance hole is aligned with the lens along the optical axis direction, and the avoidance groove is used for avoiding a circuit connected to the aperture adjusting part.

In one embodiment, the carrier is further provided with a sensor for detecting the position of the carrier.

In the lens driving mechanism, the first group of magnets and the second group of magnets are arranged on the frame, wherein the size of the first group of magnets along the optical axis direction is smaller than that of the second group of magnets along the optical axis direction.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, unless otherwise specified.

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

Fig. 4 is an assembly view of the lens driving mechanism in the embodiment shown in fig. 1.

Fig. 5, 6 and 7 are perspective views of the frame, the first and second sets of magnets of the frame, and the carrier of the embodiment of fig. 1.

FIG. 8 is an assembly view of the frame, the first and second sets of magnets of the frame, and the carrier of the embodiment of FIG. 5.

Fig. 9 is a cross-sectional view of the lens driving mechanism in the optical axis direction in the embodiment shown in fig. 4.

Reference numerals: 100. a lens driving mechanism; 1. a bottom plate; 2. a frame; 21. a first groove; 22. a second groove; 23. a first magnet; 24. a second magnet; 25. a limit groove; 26. a sensor; 3. a carrier; 31. a second set of coils; 32. a limit protrusion; 33. a sensor; 41. a first reed; 42. a second reed; 5. a housing; 51. avoidance holes; 52. an avoidance groove; 6. a circuit board; 61. a first set of coils; 7. and (5) suspending wires.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous specific details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

In the following description, for the purposes of explanation of 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 an embodiment 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.

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

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

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

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

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

The present invention relates to a lens driving mechanism 100, the lens driving mechanism 100 being for driving a lens to move. In the embodiment shown in fig. 1 and 2, the lens driving mechanism 100 includes a base plate 1, a circuit board 6, a frame 2, a carrier 3, a first reed 41, a second reed 42, four suspension wires 7, and a housing 5. Wherein the base plate 1 is used for supporting the frame 2, the carrier 3, the circuit board 6, the reset member and the housing 5, and the frame 2 is used for mounting the carrier 3 to prevent lens shake. The carrier 3 is used for mounting the lens and driving the lens to move along the optical axis direction so as to adjust the focal length of the lens. After the carrier 3 moves, the first reed 41 and the second reed 42 can drive the carrier 3 to reset. The plurality of suspension wires 7 are used for suspending the frame 2 above the bottom plate 1, so that the frame 2 can move conveniently. The housing 5 serves to protect the frame 2 and the carrier 3.

Specifically, as shown in fig. 3, the base plate 1 is rectangular plate-shaped and extends in a radial direction perpendicular to the optical axis direction of the lens, and the plane of the base plate 1 is perpendicular to the optical axis direction. It should be understood that in other embodiments, the base plate 1 may also be a circular plate or other shape, and the shape of the base plate 1 may be set according to the requirements of the electronic device, and the specific shape of the base plate 1 is not limited herein.

The interior of the base plate 1 is also provided with built-in circuitry which is electrically connectable to an external power source for energizing the circuit board 6 and the coils of the carrier 3, as will be described in more detail below.

The circuit board 6 is plate-shaped and covers the top surface of the bottom plate 1 along the optical axis direction, the top surfaces of the circuit board 6 and the bottom plate 1 are clamped or connected in other modes, the specific connection mode of the circuit board 6 and the bottom plate 1 is not limited, in addition, as shown in fig. 9, a first group of coils 61 are further arranged in the circuit board 6 and are electrically connected with a built-in circuit inside the bottom plate 1, and the built-in circuit can be electrified after being electrified.

The frame 2 is ring-shaped extending around the optical axis direction and is suspended above the base plate 1 and the circuit board 6 by four suspension wires 7. Specifically, as shown in fig. 5, 6 and 7, the carrier 3 is mounted in the ring of the frame 2, and the first reed 41 is elastic and is located on top of the frame 2 and the carrier 3, and one part of the first reed 41 is connected to the frame 2 and the other part is connected to the carrier 3. The second spring 42 is likewise resilient and is located at the bottom of the frame 2 and carrier 3, and the second spring 42 is likewise connected to the frame 2 and carrier 3. The top ends of the four suspension wires 7 are respectively connected with the first reed 41, the bottom ends extend beyond the bottom of the frame 2 along the optical axis direction and are respectively connected with the bottom plate 1, the frame 2 is suspended above the bottom plate 1 and the circuit board 6 by the four suspension wires 7 through the first reed 41, and the frame 2 can conveniently move along the radial direction so as to prevent lens shake.

Further, the carrier 3 is movable in the optical axis direction within the frame 2 to adjust the lens focal length. After the carrier 3 moves, the elastic force of the first reed 41 and the second reed 42 can drive the carrier 3 to reset. It will be appreciated that other return elements may be used to return the drive carrier 3, or that other shapes of spring plates may be used instead of the first spring plate 41 and the second spring plate 42, without limiting the type of return element used.

In the embodiment shown in fig. 5-9, the frame 2 is rectangular and annular, the frame 2 is provided with a first set of magnets and a second set of magnets, the first set of magnets comprises four first magnets 23 which are used for being matched with the first set of coils 61 to drive the frame 2 to move along the radial direction, the lens is inclined along the radial direction due to shaking, and the frame 2 can drive the lens to reset through the carrier 3 to prevent the lens from shaking. The second set of magnets comprises four second magnets 24, the four second magnets 24 being adapted to cooperate with the second set of coils 31 to drive the carrier 3 in the direction of the optical axis of the lens for adjusting the focal length of the lens.

Specifically, as shown in fig. 5, the four corners of the frame 2 are respectively provided with mounting grooves including a first groove 21 and a second groove 22 which communicate with each other, the first groove 21 and the second groove 22 being respectively formed by extending the bottom surface of the frame 2 in the optical axis direction, the first groove 21 being located radially outside the second groove 22 and communicating with the second groove 22. The depth of the first recess 21 is much smaller than the depth of the second recess 22 for mounting the first magnet 23. The second recess 22 is for mounting a second magnet 24.

As shown in fig. 8 and 9, the bottoms of the first magnet 23 and the second magnet 24 each extend beyond the bottom surface of the frame 2 and are spaced apart from the circuit board 6. The thickness of the first magnet 23 along the optical axis direction is far smaller than that of the second magnet 24 along the optical axis direction, and the polarity direction of the first magnet 23 may be distributed along the radial direction, that is, the N pole and the S pole of the first magnet 23 are respectively located at two sides of the first magnet 23 along the radial direction. Since the first magnet 23 is close to the circuit board 6 and is located above the first set of coils 61, the magnetic field lines of the first magnet 23 can vertically pass through the first set of coils 61 in a large amount, so that the magnetic flux of the first magnet 23 passing through the first set of coils 61 can be increased, and the lorentz force of the first magnet 23 matched with the first set of coils 61 can be further increased, and the propelling force of the driving frame 2 can be increased. In the prior art, four magnetite that the frame bottom set up are overall structure magnetite, and its N, S magnetic pole is located the inside and outside of frame along radial respectively, and the magnetite magnetism induction line of this structure can pass the second coil group perpendicularly, and the slope passes first coil group simultaneously to lead to the lorentz force that produces between first coil group and the magnetite to be less than the lorentz force between second coil group and the magnetite, this kind of design structure makes the carrier carry out the drive power that the optical axis direction removed great, and the drive power that frame and carrier carry out radial movement is less. The N pole and S pole of the first magnet 23 are distributed along the radial direction, so that the number of magnetic field lines of the first magnet 23 vertically passing through the first set of coils 61 can be increased, the lorentz force between the first magnet 23 and the first set of coils 61 can be increased, the size of the first magnet 23 is smaller than that of the second magnet 24, compared with the prior art, the size of the first magnet 23 is reduced, the weight of the frame 2 is reduced, and the driving load required for driving the frame 2 is further reduced.

The second magnet 24 is located radially inward of the first magnet 23 and is radially aligned with the first magnet 23, and a bottom surface of the second magnet 24 is substantially flush with a bottom surface of the first magnet 23. The polar directions of the second magnets 24 may be arranged to be distributed in the axial direction, for example, the N poles of the second magnets 24 may be made to be above, the S poles to be below, and the S poles to be attracted to the polar N poles radially inside the first magnets 23. The second magnet 24 is located radially inward of the first magnet 23, closer to the carrier 3, and radially outward of the carrier 3 surrounds the second set of coils 31. The second set of coils 31 are substantially aligned with the second magnet 24 in the radial direction, and the magnetic field lines of the second magnet 24 may extend substantially perpendicularly through the second set of coils 31, which may increase the magnetic flux of the second magnet 24 through the second set of coils 31, thereby increasing the lorentz force of the second magnet 24 and the second set of coils 31 and thus the propulsion of the drive carrier 3.

It will be appreciated that the second magnet 24 may also be located radially outward of the first magnet 23, the radially outward side of the carrier 3 may be disposed above the first magnet 23 and adjacent the second magnet 24, and the distance of the second magnet 24 from the coils of the carrier 3 may be increased, thereby increasing the number of magnetic field lines of the second magnet 24 passing perpendicularly through the second set of coils 31.

In other embodiments, the first set of magnets and the second set of magnets may be disposed on four sides of the frame 2, and the number of the first magnets 23 in the first set of magnets may be greater, for example, the second magnets 24 may be disposed in two, three or more, and the plurality of second magnets 24 may be spaced around the circumference of the frame 2. Also, the number of the second magnets 24 in the second group of magnets may be two, three or more, and the plurality of second magnets 24 may be arranged at intervals around the circumference of the frame 2, where the number and specific positions of the first magnets 23 and the second magnets 24 are not limited.

The carrier 3 is ring-shaped extending around the optical axis direction, and the carrier 3 is located in the ring of the frame 2 and movable in the optical axis direction within the frame 2. In addition, a plurality of protruding limit protrusions 32 are further arranged on the radial outer side of the carrier 3, and the plurality of limit protrusions 32 are respectively arranged at intervals along the circumferential direction of the carrier 3 and are positioned at the bottom of the carrier 3 along the optical axis direction. The radial inner surface of the frame 2 is provided with a plurality of limit grooves 25, the plurality of limit grooves 25 are respectively formed by recessing the bottom surface of the frame 2, the plurality of limit grooves 25 are respectively aligned with the plurality of limit protrusions 32 in the radial direction and accommodate the plurality of limit protrusions 32, and the plurality of limit grooves 25 can also allow the plurality of limit protrusions 32 to move in the optical axis direction in the interior thereof and can also limit the carrier 3 to move around the optical axis direction. That is, after the first set of coils 61 is electrified, the first set of magnets can be matched with the first set of magnets to drive the frame 2 to move along the radial direction, when the frame 2 moves, the carrier 3 and the lens in the carrier 3 can be driven to move along the radial direction, and the carrier 3 and the frame 2 can synchronously move along the radial direction by being matched with the plurality of limiting grooves 25 and the plurality of limiting protrusions 32.

In the embodiment shown in fig. 6, four limit grooves 25 are respectively located at four sides of the frame 2, and four limit protrusions 32 are respectively connected to the radially outer sides of the carrier 3 and located within the four limit grooves 25. It should be understood that in other embodiments, for example, the first set of magnets and the second set of magnets are disposed on four sides of the frame 2, and the four limit grooves 25 may also be disposed on four corners of the frame 2, and the specific positional relationship of the four limit grooves 25 is not limited herein. Furthermore, two, three or more limit grooves 25 may be provided as long as the movement of the carrier 3 in the radial direction can be restricted, without restricting the specific number of limit grooves 25.

The four suspension wires 7 may be partially or entirely conductive, and the suspension wires 7 may be electrically connected to a built-in circuit in the base plate 1. The first reed 41 is electrically conductive and electrically connected with the electrically conductive suspension wire 7 and the second set of coils 31, and after the built-in circuit of the base plate 1 is energized, current can flow into the second set of coils 31 through the suspension wire 7 and the first reed 41 to energize the second set of coils 31.

The housing 5 is wrapped outside the frame 2, the carrier 3, the first reed 41, the second reed 42, and the four suspension wires 7, and the bottom of the housing 5 is opened. The housing 5 may cover the top of the base plate 1 from above and be connected to the base plate 1. The top of the housing 5 is provided with a light avoiding hole 51 aligned with the lens in the optical axis direction for avoiding light.

As another preferred embodiment, an aperture adjusting member may be further provided in the lens driving mechanism 100, for example, a plurality of blades rotatable in the optical axis direction may be provided between the upper side of the first reed 41 and the top of the housing 5 or on the top of the housing 5, and during rotation of the plurality of blades, two adjacent blades overlap and block the light entering the lens to different extents, thereby adjusting the aperture of the lens, and patent CN113885269a may be referred to.

Further, in order to energize the aperture adjusting member, the top of the housing 5 is further provided with an avoidance groove 52, and the avoidance groove 52 penetrates through the top wall of the housing 5 and can avoid a circuit connected to the aperture adjusting member, so that the circuit is convenient to energize the aperture adjusting member. Alternatively, the diaphragm adjusting member may be energized by the built-in circuit of the base plate 1 and the suspension wire 7, and the current is passed through the diaphragm adjusting member and then connected to an external power source to form a loop through the circuit, and the circuit may be connected to the diaphragm adjusting member from the escape groove 52. In the embodiment shown in fig. 4, the avoidance groove 52 is communicated with the avoidance hole 51, so that the processing of the housing 5 is facilitated. As shown in fig. 4, a part of the first reed 41 may be exposed, a diaphragm adjusting member may be mounted above the housing 5, and a circuit of the diaphragm adjusting member may be electrically connected to the first reed 41, and power may be supplied to the diaphragm adjusting member through the built-in line of the base plate 1, the suspension wire 7, and the first reed 41. It will be appreciated that the aperture adjustment member may be replaced with other members and the relief groove 52 may be used to provide an energized path for the other members.

The radially outer side of the carrier 3 is further provided with a sensor 33, which sensor 33 can be used to detect a specific position of the carrier 3, facilitating a more accurate control of the movement of the carrier 3. A sensor 26 is also mounted radially inside the frame 2, which sensor 26 is used to sense the position of the frame 2 in order to control the movement of the frame 2 more accurately.

In the lens driving mechanism 100 of the present invention, the first set of magnets and the second set of magnets are disposed on the frame 2, wherein the axial dimension of the first set of magnets is smaller than the axial dimension of the second set of magnets.

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

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

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

Claims

1. A lens driving mechanism for driving a lens to move, comprising:

2. The lens driving mechanism according to claim 1, wherein the plurality of first magnets are attracted to the plurality of second magnets, respectively, and are located radially outward of the plurality of second magnets.

3. The lens driving mechanism according to claim 1, wherein bottom surfaces of the plurality of first magnets are flush with bottom surfaces of the plurality of second magnets.

4. A lens driving mechanism according to claim 3, wherein said frame is rectangular ring-shaped and four corners are respectively provided with mounting grooves, and four of said mounting grooves are respectively recessed from a bottom surface of said frame in an optical axis direction; the four first magnets and the four second magnets are respectively positioned in the four mounting grooves, and the bottom surfaces of the first magnets and the bottom surfaces of the second magnets extend beyond the bottom surface of the frame and are arranged at intervals with the circuit board.

5. The lens driving mechanism according to claim 4, wherein the second set of coils is wound to a radially outer side of the carrier, the radially outer side of the carrier being provided with a plurality of protruding stopper projections, the plurality of stopper projections being located at a bottom of the carrier; the radial inner surface of the frame is provided with a plurality of limit grooves, and a plurality of limit grooves are respectively formed by the bottom surface of the frame in a concave manner and accommodate a plurality of limit protrusions.

6. The lens driving mechanism as claimed in claim 5, wherein four of the limit grooves are respectively located at four sides of the frame, and four of the limit protrusions are respectively located in four of the limit grooves.

7. The lens driving mechanism according to claim 1, wherein a built-in circuit is provided in the base plate, the built-in circuit being electrically connected to the circuit board;

the reset piece includes:

8. The lens driving mechanism as recited in claim 7, further comprising an aperture adjusting member located above said first reed for adjusting an aperture of the lens.

9. The lens driving mechanism according to claim 8, further comprising a housing, the housing being wrapped around the frame and the outside of the return member, a bottom of the housing being connected to the bottom plate, a top of the housing being provided with a dodging hole aligned with the lens in the optical axis direction and a dodging groove for dodging a circuit connected to the diaphragm adjusting member.

10. The lens driving mechanism according to claim 9, wherein the carrier is further provided with a sensor for detecting a position of the carrier.