CN217467318U

CN217467318U - Lens driving mechanism

Info

Publication number: CN217467318U
Application number: CN202221733593.9U
Authority: CN
Inventors: 鲍和平; 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: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-09-20
Anticipated expiration: 2032-07-05

Abstract

The utility model discloses a camera lens actuating mechanism. The utility model discloses in, camera lens actuating mechanism includes: the base is provided with a first light through hole; the base is provided with a plurality of guide posts extending along the optical axis direction; the base is movably arranged on the base, a second light through hole communicated with the first light through hole is formed in the base, and the guide column penetrates through the base; the screw rod device is connected with the base and drives the base to move along the direction of the optical axis; the carrier is movably arranged on the base and is used for carrying the lens; a coil fixed on the carrier; a magnet abutting against the base; the coil and the magnet act to drive the carrier to move along the direction of the optical axis; the bracket is movably positioned at the top end of the carrier; an upper elastic sheet; a lower elastic member; the frame is sleeved outside the carrier and fixed with the base, and the guide post is inserted into the frame; the base and the carrier are operable to move in the optical axis direction within the frame. Compared with the prior art, the large-distance focusing operation and the micro-focusing operation of the lens can be realized.

Description

Lens driving mechanism

Technical Field

The utility model relates to an optics field, in particular to camera lens actuating 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.

When a user uses an electronic device equipped with a lens module, the user may shake, and an image captured by the lens module may be blurred. However, the requirements for image quality are increasing, and the driving function of the lens module (optical element) is becoming more important.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a camera lens actuating mechanism for can realize the focusing operation and the micro-focusing operation of the big distance of camera lens.

In order to solve the above technical problem, an embodiment of the present invention provides a lens driving mechanism, which is characterized in that, include:

the light source device comprises a base, a first light transmitting hole and a second light transmitting hole, wherein the base is provided with the first light transmitting hole; the base is provided with a plurality of guide posts extending along the direction of the optical axis;

the base is movably arranged on the base, a second light through hole communicated with the first light through hole is formed in the base, and the guide column penetrates through the base;

the screw rod device is arranged on the base, is connected with the base and is used for driving the base to move along the direction of an optical axis;

the carrier is movably arranged on the base along the direction of the optical axis and is used for carrying a lens;

a coil fixed on the carrier;

a magnet abutting against the base; the coil and the magnet act to drive the carrier to move along the direction of the optical axis;

the bracket is movably positioned at the top end of the carrier;

an upper elastic sheet connecting the bracket and the carrier;

a lower elastic member connecting the carrier and the base; and the number of the first and second groups,

the frame is sleeved outside the carrier and fixed with the base, and the guide post is inserted into the frame; the top end of the frame is provided with a third light passing hole; the base and the carrier are operable to move in the optical axis direction within the frame.

In one embodiment, the lead screw device includes:

the fixed shell is arranged on the base;

the motor is connected with the fixed shell;

the screw rod is arranged in the fixed shell and is arranged side by side with the motor, and two ends of the screw rod are rotationally connected with the fixed shell; the extension directions of the lead screw and the main shaft of the motor are both parallel to the optical axis;

the first gear is sleeved on a main shaft of the motor;

a second gear sleeved on the screw rod and meshed with the first gear,

the lifting piece is meshed with the screw rod and movably sleeved on the screw rod, and the lifting piece moves along the direction of the optical axis through the rotation of the screw rod; the lifting piece is fixedly connected with the base.

In one embodiment, the base has a protruding extension platform, a connecting groove is opened on one side of the extension platform facing the screw rod device, and the lifting piece is embedded in the connecting groove.

In an embodiment, the upper wall and the lower wall of the connecting groove are both provided with a notch for inserting the screw rod on one side facing the screw rod.

In one embodiment, the extension stage extends and protrudes along a direction perpendicular to the optical axis, and the bottom surface of the extension stage is spaced from the upper surface of the base; the bottom of the fixed shell is embedded between the bottom surface of the extension table and the upper surface of the base.

In an embodiment, the base is provided with a groove for placing the screw rod device, the extension table extends to the position above the groove, and the bottom surface of the extension table is higher than the groove bottom of the groove.

In one embodiment, one side surface of the base with the extension table is connected with two adjacent side surfaces to form two edges of the base, and at least two guide columns are respectively positioned between the two edges and the carrier.

In one embodiment, the frame is provided with a mounting groove for embedding the screw rod device.

In one embodiment, the base is provided with a protruding mounting part arranged on the periphery of the carrier;

the lens driving mechanism further includes: a position sensor provided on the projecting mounting member, a circuit board mounted outside the frame; the carrier is provided with an induction magnet, and the position sensor is opposite to the induction magnet and is used for inducing the induction magnet; the circuit board is electrically connected with the motor and the power-on point on the base, and the motor is electrically connected with the circuit board; the circuit board is electrically connected with the position sensor.

In one embodiment, the circuit board has a first board electrically connected to the motor, a second board bent and connected to the first board, an elastic portion connected to the top of the second board, a third board bent and connected to the free end of the elastic portion, and a fourth board bent and connected to the third board; at least part first plate body and at least part the vertical embedding of second plate body is in the both sides wall that the frame is adjacent, the third plate body extend to in the frame with circular telegram point electric connection on the base, the fourth plate body is used for connecting position sensor, just the elasticity portion with the third plate body will the second plate body with the fourth plate body separates mutually.

In one embodiment, the lens driving mechanism further includes: the shell is sleeved on the periphery of the protruding installation part and the periphery of the carrier, and the top of the shell is provided with a fourth light passing hole communicated with the third passing hole;

an installation notch used for installing the third plate body is formed in the upper surface of the base, and the installation notch extends into the shell from the base to the edge of the second plate body; the fourth plate body extends vertically upward and is inserted into the housing.

In one embodiment, the elastic part has a first elastic vertical body connected to the top of the second plate, an elastic horizontal body connected to the first elastic vertical body, and a second elastic vertical body connecting the third plate and the elastic horizontal body.

In one embodiment, the base is provided with a protruding support member disposed on the periphery of the carrier, and the magnet is disposed on the protruding support member.

In one embodiment, the plurality of protruding supporting pieces and the plurality of magnets are arranged in a one-to-one correspondence manner; each magnet extends upwards to abut against the bracket.

In one embodiment, the lens driving mechanism further includes: the shell is sleeved on the peripheries of the convex support, the carrier and the magnet, and the top of the shell is provided with a fourth light passing hole communicated with the third passing hole; and the magnet is in a convex arc shape.

In one embodiment, the support has an outer frame surrounding the top of the carrier, a plurality of bottom protrusions extending downward from the bottom of the outer frame; the magnets are clamped between the two adjacent bottom bulges; and at least one of the bottom protrusions is connected with the upper elastic sheet.

In one embodiment, the lens driving mechanism further includes: the shell is sleeved on the peripheries of the carrier and the magnet, and the top of the shell is provided with a fourth light passing hole communicated with the third passing hole;

the bracket is embedded in the third light passing hole, the outer frame is annular, and a light-transmitting dustproof cover for covering the third light passing hole is embedded in the outer frame.

In one embodiment, the lens driving mechanism further includes: the plug the first light through hole with the printing opacity dustproof plug of second light through hole, just the printing opacity dustproof plug with the inner wall of first light through hole with the second light through hole all seals up the counterbalance.

In an embodiment, the second light passing hole has a first hole body, a second hole body and a third hole body connected from top to bottom, the diameter of the first hole body is smaller than that of the second hole body, and the diameter of the second hole body is smaller than that of the third hole body;

the transparent dustproof plug is provided with a partially transparent top closure at least opposite to the first hole body, an inner ring wall surrounding the transparent top, a middle ring wall surrounding the periphery of the inner ring wall, an outer ring wall surrounding the periphery of the middle ring wall, a first connecting bottom connecting the bottom of the outer ring wall and the bottom of the middle ring wall, and a first connecting top connecting the top of the middle ring wall and the top of the outer ring wall;

the inner ring wall is abutted against the inner wall of the second hole body; the outer ring wall is abutted against the inner wall of the third hole body and the inner wall of the first light through hole; the first connecting top abuts against the base at the top of the third hole body, and part of the sealing top abuts against the base at the top of the second hole body.

The utility model discloses embodiment is for prior art, through the setting of screw rod device, but the quick adjustment base moves along the optical axis direction, and guide post and screw rod device's cooperation, can let the base motion precision better, and reduced magnetic material, and then realize installing on the base at the carrier, the motion of base and then let the carrier drive camera lens internal motion on a large scale. The carrier is connected with the support through the upper elastic sheet and connected with the base through the lower elastic sheet, so that the carrier can carry the lens to move relative to the base along the direction of an optical axis, and small-range movement is realized, and quick and high-precision focusing operation and micro-focusing operation on the lens at a large distance are realized.

Drawings

Fig. 1 is a schematic view illustrating a structure of a lens driving mechanism according to an embodiment of the present invention in which a housing is separated;

fig. 2 is a partial exploded view of a lens driving mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a screw device according to an embodiment of the present invention;

fig. 5 is an exploded view of a lens driving mechanism without a base and a cover according to an embodiment of the present invention;

FIG. 6 is a schematic view of an embodiment of the upper resilient tab attached to the carrier according to the present invention;

fig. 7 is a schematic structural view of a lower elastic piece connected to a base according to an embodiment of the present invention;

fig. 8 is an exploded view of the light transmissive dust plug, base, and base in accordance with an embodiment of the present invention;

fig. 9 is a schematic view of a light-transmitting dust plug installed in a base and a pedestal according to an embodiment of the present invention;

fig. 10 is a schematic structural view of the base, the carrier and the bracket after being installed according to an embodiment of the present invention;

100, a lens driving mechanism; 1. a base; 10. a first light passing hole; 11. a guide post; 12. a groove; 2. a base; 20. a second light passing hole; 201. a first aperture body; 202. a second aperture body; 203. a third porous body; 21. an extension stage; 210. connecting grooves; 211. a notch; 22. an edge; 23. a male mounting member; 24. installing a notch; 25. a protruding support; 3. a screw device; 31. a stationary case; 32. a motor; 33. a screw rod; 34. a first gear; 35. a second gear; 36. a lifting member; 4. a carrier; 41. an upper elastic piece mounting portion; 42. a placing groove; 51. a coil; 52. a magnet; 7. a support; 71. an outer frame; 72. the bottom is convex; 73. an upper elastic piece mounting portion; 81. an upper elastic sheet; 811. a bracket mounting portion; 812. a carrier mounting section; 82. a lower elastic member; 821. a base mounting portion; 822. a carrier mounting section; 9. a frame; 90. a third light passing hole; 91. mounting grooves; 53. a position sensor; 54. an induction magnet; 6. a circuit board; 61. a first plate body; 62. a second plate body; 63. an elastic portion; 631. a first elastic vertical body; 632. an elastic horizontal body; 633. a second elastic vertical body; 64. a third plate body; 65. a fourth plate body; 101. a housing; 1010. a fourth light passing hole; 102. a light-transmitting dust cover; 103. a light-transmitting dust plug; 1031. capping; 1032. an inner annular wall; 1033. a middle annular wall; 1034. an outer annular wall; 1035. a first connection base; 1036. a first connecting top; 1037. an outer flange; 104. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail each embodiment of the present invention 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 technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Various 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 as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution 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, 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.

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 sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Hereinafter, the direction of the optical axis may be an axial direction of the first light passing hole.

Embodiments of the present invention are described below with reference to the drawings. As shown in fig. 1, 2, and 5, the lens driving mechanism 100 includes: the device comprises a base 1, a base 2, a screw rod device 3, a carrier 4, a coil 51, a magnet 52, a bracket 7, an upper elastic sheet 81, a lower elastic piece 82 and a frame 9. The base 1 is provided with a first light through hole 10, and the base 1 is provided with a plurality of guide posts 11 extending along the optical axis direction. The base 2 is movably arranged on the base 1, a second light through hole 20 communicated with the first light through hole 10 is formed in the base 2, and the guide column 11 penetrates through the base 2 and is connected with the frame 9. The screw rod device 3 is arranged on the base 1 and connected with the base 2, and the screw rod device 3 is used for driving the base 2 to move along the optical axis direction. The carrier 4 is movably disposed on the base 2 along the optical axis direction and is used for carrying a lens. The coil 51 is fixed to the carrier 4, the magnet 52 abuts against the base 2, and the coil 51 and the magnet 52 act to drive the carrier 4 to move in the optical axis direction. The support 7 is movably located at the top end of the carrier 4. As shown in fig. 5, 6 and 7, the upper elastic piece 81 connects the bracket 7 and the carrier 4, and the lower elastic piece 82 connects the carrier 4 and the base 2. The frame 9 is sleeved outside the carrier 4 and fixed with the base 1, and the guide posts 11 are inserted into the frame 9. The top end of the frame 9 is provided with a third light passing hole 90. The base 2 and the carrier 4 are operable to move in the optical axis direction within the frame 9. The lens driving mechanism 100 further includes an outer cover 104 covering the frame 9, and the outer cover 104 is provided with a light hole.

Specifically, as shown in fig. 1, fig. 2 and fig. 5, the screw device 3 is connected to the base 2, and drives the base 2 to move along the guide post 11, that is, the guide post 11 guides the base 2, so that the base 2 moves along the optical axis direction, and the base 2 drives the carrier 4 to move together. The built-in circuit in the base 2 is electrified to the elastic sheet 82 downwards, the elastic sheet 82 simultaneously transmits current to the carrier 4, the current is transmitted to the coil 51 through the built-in circuit on the carrier 4, the energization of the coil 51 is realized, the coil 51 is electrified and then matched with the magnet 52, the coil 51 moves on the carrier 4 along the optical axis direction together with the carrier 4, and the longitudinal movement of the lens carried by the carrier 4 between the base 2 and the support 7 is realized. And the carrier 4 is pulled to reset after longitudinal movement through the elasticity of the upper elastic sheet 81 and the lower elastic sheet 82. A holder mounting portion 811 of the upper spring plate 81 is connected to the upper spring plate mounting portion 73 of the holder, and a carrier mounting portion 812 of the upper spring plate 81 is connected to the upper spring plate mounting portion 41 of the carrier. The base mounting portion 821 of the lower spring plate 82 is connected to the base 2, and the carrier mounting portion 822 of the lower spring plate 82 is connected to the carrier 4.

Through the above-mentioned technique discovery, through the setting of screw rod device 3, but the motion of quick adjustment base 2 along the optical axis direction, and guide post 11 and screw rod device 3's cooperation can let base 2 motion accuracy better, and reduced magnetic material, and then realize installing on base 2 at carrier 4, the motion of base 2 and then let carrier 4 drive the camera lens internal motion on a large scale. The carrier 4 is connected with the support 7 through the upper elastic sheet 81 and connected with the base 2 through the lower elastic sheet 82, so that the carrier 4 can carry the lens to move along the optical axis direction relative to the base 2, and the movement within a small range is realized, thereby realizing the quick and high-precision focusing operation and micro-focusing operation on the lens at a large distance.

Further, as shown in fig. 1, 2 and 4, the screw device 3 includes: the fixed shell 31 is arranged on the base 2, the motor 32 is connected with the fixed shell 31, the screw 33 is arranged in the fixed shell 31 and is arranged side by side with the motor 32, two ends of the screw 33 are rotatably connected with the fixed shell 31, and the extension directions of the main shafts of the screw 33 and the motor 32 are parallel to the optical axis. The first gear 34 is sleeved on the main shaft of the motor 32, and the second gear 35 is sleeved on the screw rod 33 and meshed with the first gear 34. The lifting piece 36 is engaged with the screw rod 33 and movably sleeved on the screw rod 33, the lifting piece 36 rotates through the screw rod 33 to move along the direction of the optical axis, and the lifting piece 36 is fixedly connected with the base 2. The motor 32 rotates to drive the first gear 34 to rotate, the first gear 34 drives the second gear 35 to rotate, the second gear 35 drives the screw rod 33 to rotate, the lifting piece 36 moves along the length direction of the screw rod 33 when the screw rod 33 rotates, and when the lifting piece 36 moves upwards, the lifting piece drives the base 2 to move upwards together; when the lifting member 36 moves downward, the lifting member moves the base 2 downward together with the lifting member.

As shown in fig. 1, 2 and 5, the frame 9 is fixed to the base 1, and in order to mount the screw device 3 more preferably, the frame 9 is provided with a mounting groove 91 for fitting the screw device 3. The terminals of the motor 32 are exposed outside the frame 9 for subsequent circuit connection.

Further, as shown in fig. 1, 2 and 5, the base 2 has a protruding extension table 21, a connection groove 210 is opened on a side of the extension table 21 facing the screw device 3, and the lifting element 36 is embedded in the connection groove 210. Therefore, the lifting piece and the connecting groove 210 are two parts, when the screw rod device 3 is installed, the lifting piece 36 is inserted into the connecting groove 210 and fixed with the connecting groove 210 through gluing or other forms, and therefore the screw rod device 3 is convenient to install on the base 2.

Further, as shown in fig. 1, 2 and 5, the upper wall and the lower wall of the connection groove 210 are both opened with a notch 211 for inserting the screw rod 33 on one side facing the screw rod 33, and the upper wall and the lower wall of the connection groove 210 are at least partially opposite to the lifting member 36. Through the setting of notch 211, let and form the position of dodging of lead screw 33 on the extension platform 21, can imbed lead screw 33 to the extension platform 21 in, lifting unit 36 has more connected regions with the extension platform 21, connects more stably, also lets the space on the base 2 more compact, can form more reasonable overall arrangement among each part in the lens actuating mechanism 100.

Specifically, as shown in fig. 1, 2 and 5, the extension stage 21 is extended and projected in a direction perpendicular to the optical axis, and the bottom surface of the extension stage 21 is spaced apart from the upper surface of the base 1, and the bottom of the fixing case 31 is embedded between the bottom surface of the extension stage 21 and the upper surface of the base 1. The screw rod device 3 is more compactly matched with the base 2 and the base 1, and more reasonable layout can be formed among all the components in the lens driving mechanism 100.

Specifically, as shown in fig. 1, 2 and 5, a groove 12 for placing the screw device 3 is formed on the base 1, the extension table 21 extends above the groove 12, the bottom surface of the extension table 21 is higher than the bottom of the groove 12, and the bottom of the fixing shell 31 can be inserted into the groove 12.

It will be appreciated that in other embodiments, the base 1 may not have the groove 12, and the bottom surface of the extension platform 21 is higher than the bottom surface of the base 2, so that there is a space between the extension platform 21 and the top surface of the base 1 for the bottom of the fixing shell 31 to be inserted.

Preferably, as shown in fig. 1, 2 and 5, the base 2 has two edges 22, one side of the extension 21 is connected to the adjacent two sides to form the base 2, and the two guide posts 11 are respectively located between the two edges 22 and the carrier 4. That is, the guide post 11 is inserted through the end angles of the two bases 2, which are the end angles close to the screw rod device 3, so that the guide post 11 is close to the screw rod device 3, and the closer the guide post 11 is to the screw rod 33, the smaller the deviation of the movement of the base 2 along the guide post 11 will be. The number of the guide posts 11 is not limited to 2, and may be more, and may be partially guided to the end angle side near the screw rod device 3, or may be entirely guided to the end angle side near the screw rod device 3.

Further, as shown in fig. 1, 2, 5 and 7, the base 2 is provided with a protruding mounting member 23 disposed on the periphery of the carrier 4. The lens driving mechanism 100 further includes: a position sensor 53 provided on the projecting mount 23, and a circuit board 6 mounted on the outside of the frame 9. The carrier 4 is provided with an induction magnet 54, and the position sensor 53 is opposed to the induction magnet 54 for inducing the induction magnet 54. The carrier 4 is provided with a placing groove 42 for placing the induction magnet 54, the circuit board 6 is electrically connected with the motor 32 and the power-on point on the base 2, and the motor 32 is electrically connected with the circuit board 6. The circuit board 6 is electrically connected with the position sensor 53.

Specifically, as shown in fig. 1, 2 and 3, the circuit board 6 includes a first board 61 electrically connected to the motor 32, a second board 62 bent and connected to the first board 61, an elastic portion 63 connected to a top of the second board 62, a third board 64 bent and connected to a free end of the elastic portion 63, and a fourth board 65 bent and connected to the third board 64. At least part of the first board 61 and at least part of the second board 62 are vertically embedded in two adjacent side walls of the frame 9, the third board 64 extends into the frame 9 and is electrically connected with a power-on point on the base 2, the fourth board 65 is used for connecting the position sensor 53, and the elastic part 63 and the third board 64 separate the second board 62 and the fourth board 65. The third plate 64 is electrically connected to the power-on point on the base 2, and supplies power to the position sensor 53, so that the position sensor 53 drives the induction magnet 54 to move together when the base 2 moves along the optical axis direction, and the position sensor 53 can detect the operating state of the base 2 through the induction magnet 54. After the base 2 is driven by the screw rod device 3 to move, the base 2 can drive the third plate 64 and the fourth plate 65 to move together, and the elastic part 63 can play a role of resetting.

Further, as shown in fig. 1, 2, 3, and 10, the lens driving mechanism 100 further includes: and the shell 101 is sleeved on the periphery of the protruding mounting part 23 and the periphery of the carrier 4, and the top of the shell 101 is provided with a fourth light passing hole 1010 communicated with the third passing hole. An installation notch 24 for installing the third plate body 64 is formed in the upper surface of the base 2, the installation notch 24 extends into the casing 101 from the edge of the base 2 facing the second plate body 62, and the fourth plate body 65 extends vertically upwards and is inserted into the casing 101. Therefore, the circuit board 6 can be reasonably arranged, the circuit board 6 is the flexible circuit board 6, the function of the circuit board 6 is not limited, the circuit board 6 is better configured with the base 2, the shell 101 and the frame 9 in structure, and redundant space is not occupied.

Preferably, as shown in fig. 1, 2 and 3, the elastic part 63 has a first elastic vertical body 631 connected to the top of the second plate 62, an elastic horizontal body 632 connected to the first elastic vertical body 631, and a second elastic vertical body 633 connecting the third plate 64 and the elastic horizontal body 632. Thereby can form the resilience force of horizontal direction and vertical direction, let the better reseing of circuit board 6, and reduce circuit board 6 and be driven by base 2 and connect the influence of different circuit elements to circuit board 6 electricity, let the use of dynamic circuit board 6 safe and reliable more.

Further, as shown in fig. 1, 2, 3, 5, and 7, the base 2 is provided with a protruding support 25 disposed on the periphery of the carrier 4, and the magnet 52 is disposed on the protruding support 25. The protruding support piece 25 is used for installing the magnet 52 and can be used for limiting the carrier 4, an area in which the protruding support piece 25 is partially embedded can be arranged on the periphery of the carrier 4, the carrier 4 can be conveniently installed in a fixing area of the base 2, the longitudinal movement of the carrier 4 can be guided, guiding positioning can be formed when the shell 101 is installed, and the shell 101 is sleeved outside the protruding support piece 25.

Further, as shown in fig. 1, 2, 3, 5 and 7, the protruding support 25 and the magnets 52 are provided in plural numbers and are arranged in one-to-one correspondence. The magnets 52 extend upward to abut against the holder 7. Therefore, the magnet 52 is installed in a better positioning mode through the matching of the support 7 and the protruding support piece 25, the magnet 52 is arranged vertically, the area of a magnetic induction line is larger, and a proper magnetic field is formed to enable the carrier 4 to move.

In addition, as shown in fig. 1, 2, 3, 5, 7 and 10, the magnet 52 is a convex arc shape, which is more matched with the coil 51 sleeved on the carrier 4, and can form a proper magnetic field to make the carrier 4 move along the optical axis direction without deviation, so that the precision is better.

Further, as shown in fig. 1, 2, 5, and 10, the support 7 has an outer frame 71 surrounding the top of the carrier 4, and a plurality of bottom protrusions 72 extending downward from the bottom of the outer frame 71. The magnet 52 is sandwiched between two adjacent bottom protrusions 72, and at least one bottom protrusion 72 is connected to the upper elastic sheet 81. Therefore, the magnet 52 can be positioned and fixed together with the base 2 by the bottom bulge 72 on the support 7, and the elastic sheet 81 can be connected by the bulge on the base 2, so that the mounting precision of the magnet 52 and the elastic sheet 81 can be further improved by reasonably utilizing the structure of the layout support 7.

Further, as shown in fig. 1, 2, 5, and 10, the bracket 7 is embedded in the third light-passing hole 90, the outer frame 71 is annular, and a light-transmitting dustproof cover 102 covering the third light-passing hole 90 is embedded in the outer frame 71.

Further, as shown in fig. 8 and 9, the lens driving mechanism 100 further includes: the light-transmitting dustproof plugs 103 of the first light-transmitting hole 10 and the second light-transmitting hole 20 of the plug are sealed and abutted against the inner walls of the first light-transmitting hole 10 and the second light-transmitting hole 20 of the plug. Prevent foreign matters from falling on the lens.

Specifically, as shown in fig. 8 and 9, the second light passing hole 20 has a first hole 201, a second hole 202 and a third hole 203 connected from top to bottom, the diameter of the first hole 201 is smaller than that of the second hole 202, and the diameter of the second hole 202 is smaller than that of the third hole 203.

As shown in fig. 8 and 9, the light-transmissive dust plug 103 has a partially light-transmissive closed top 1031 at least opposite to the first aperture body 201, an inner annular wall 1032 surrounding the light-transmissive top, an intermediate annular wall 1033 surrounding the outer periphery of the inner annular wall 1032, an outer annular wall 1034 surrounding the outer periphery of the intermediate annular wall 1033, a first connecting bottom 1035 connecting the bottom of the outer annular wall 1034 with the bottom of the intermediate annular wall 1033, and a first connecting top 1036 connecting the top of the intermediate annular wall 1033 with the top of the outer annular wall 1034. The inner ring wall 1032 abuts against the inner wall of the second hole body 202, the outer ring wall 1034 abuts against the inner wall of the third hole body 203 and the inner wall of the first light transmitting hole 10, the first connecting top 1036 abuts against the base 2 at the top of the third hole body 203, and the partial sealing top 1031 abuts against the base 2 at the top of the second hole body 202. Prevent that the dust from entering into the camera lens between base 1 and base 2, dustproof effect is better. The light-transmitting dust plug 103 further has an outer flange 1037 connected to the bottom of the outer annular wall 1034 and extending horizontally, and the outer flange 1037 abuts against the outer periphery of the first light-transmitting hole 10. And the light-transmitting dust plug 103 may be a rubber plug.

Implementation details of the present embodiment are specifically described below, and the following description is provided only for the sake of understanding and is not necessary for implementing the present embodiment.

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 skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims

1. A lens driving mechanism, comprising:

a coil fixed on the carrier;

the bracket is movably positioned at the top end of the carrier;

an upper elastic sheet connecting the bracket and the carrier;

2. The lens driving mechanism according to claim 1, wherein the lead screw device comprises:

the fixed shell is arranged on the base;

the motor is connected with the fixed shell;

the first gear is sleeved on a main shaft of the motor;

a second gear sleeved on the screw rod and meshed with the first gear,

3. The lens driving mechanism as claimed in claim 2, wherein the base has a protruding extension table, a connecting groove is opened on a side of the extension table facing the screw device, and the lifter is inserted into the connecting groove.

4. The lens driving mechanism according to claim 3, wherein a notch for inserting the lead screw is opened at each of sides of the upper wall and the lower wall of the connecting groove facing the lead screw.

5. The lens driving mechanism according to claim 4, wherein the extension stage is extended and projected in a direction perpendicular to the optical axis, and a bottom surface of the extension stage is spaced apart from an upper surface of the base; the bottom of the fixed shell is embedded between the bottom surface of the extension table and the upper surface of the base.

6. The lens driving mechanism as claimed in claim 5, wherein a groove for accommodating the screw device is formed in the base, the extension stage extends above the groove, and a bottom surface of the extension stage is higher than a bottom of the groove.

7. A lens driving mechanism according to claim 3, wherein one side of the base having the extension stage is connected to two adjacent sides to form two edges of the base, and at least two of the guide posts are respectively located between the two edges and the carrier.

8. The lens driving mechanism according to claim 1, wherein a mounting groove for fitting the screw device is formed in the frame.

9. A lens driving mechanism according to claim 2, wherein a protruding mount provided on the outer periphery of the carrier is provided on the base;

10. The lens driving mechanism according to claim 9, wherein the circuit board has a first plate electrically connected to the motor, a second plate bent and connected to the first plate, an elastic portion connected to a top of the second plate, a third plate bent and connected to a free end of the elastic portion, and a fourth plate bent and connected to the third plate; at least part first plate body and at least part the vertical embedding of second plate body is in the both sides wall that the frame is adjacent, the third plate body extend to in the frame with circular telegram point electric connection on the base, the fourth plate body is used for connecting position sensor, just the elasticity portion with the third plate body will the second plate body with the fourth plate body separates mutually.

11. The lens driving mechanism according to claim 10, further comprising: the shell is sleeved on the periphery of the protruding installation part and the periphery of the carrier, and a fourth light passing hole is formed in the top of the shell;

an installation notch used for installing the third plate body is formed in the upper surface of the base, and the installation notch extends into the shell from the base towards the edge of the second plate body; the fourth plate body extends vertically upward and is inserted into the housing.

12. The lens driving mechanism according to claim 10, wherein the elastic portion has a first elastic vertical body connected to a top portion of the second plate body, an elastic horizontal body connected to the first elastic vertical body, and a second elastic vertical body connecting the third plate body and the elastic horizontal body.

13. A lens driving mechanism according to claim 1, wherein a protruding support member provided on an outer periphery of the carrier is provided on the base, and the magnet is provided on the protruding support member.

14. The lens driving mechanism according to claim 13, wherein the plurality of the protruding support members and the plurality of the magnets are provided in one-to-one correspondence; each magnet extends upwards to abut against the bracket.

15. The lens driving mechanism according to claim 14, further comprising: the shell is sleeved on the peripheries of the convex support, the carrier and the magnet, and the top of the shell is provided with a fourth light passing hole communicated with the third passing hole; and the magnet is in a convex arc shape.

16. The lens driving mechanism according to claim 1, wherein the holder has an outer frame surrounding a top of the carrier, a plurality of bottom protrusions extending downward from a bottom of the outer frame; the magnets are clamped between two adjacent bottom bulges; and at least one of the bottom protrusions is connected with the upper elastic sheet.

17. The lens driving mechanism according to claim 16, further comprising: the shell is sleeved on the peripheries of the carrier and the magnet, and the top of the shell is provided with a fourth light passing hole communicated with the third passing hole;

18. The lens driving mechanism according to claim 1, further comprising: the light-transmitting dustproof plug is inserted into the first light through hole and the second light through hole, and the light-transmitting dustproof plug is in sealing and abutting contact with the inner walls of the first light through hole and the second light through hole.

19. The lens driving mechanism according to claim 18, wherein the second light passing hole has a first hole body, a second hole body and a third hole body connected from top to bottom, the first hole body has a diameter smaller than that of the second hole body, and the second hole body has a diameter smaller than that of the third hole body;

the light-transmitting dustproof plug is provided with a partially light-transmitting sealed top at least opposite to the first hole body, an inner ring wall surrounding the light-transmitting top, a middle ring wall surrounding the periphery of the inner ring wall, an outer ring wall surrounding the periphery of the middle ring wall, a first connecting bottom connecting the bottom of the outer ring wall and the bottom of the middle ring wall, and a first connecting top connecting the top of the middle ring wall and the top of the outer ring wall;