CN212111940U - Lens driving mechanism - Google Patents

Abstract

The utility model discloses a camera lens actuating mechanism, including casing, base, carrier, magnetic element, coil pack, circuit board and lower reed, the carrier is used for installing the camera lens, coil pack install in the relative both sides of carrier, magnetic element install in on the base and with the coil pack cooperation, the reed will down the carrier with base swing joint, the circuit board set up in on the base and the orientation one of them lateral part of carrier, wherein, the reed will down the circuit board with the coil pack electricity is connected.

Description

Lens driving mechanism

Technical Field

The utility model relates to an optical imaging field, concretely relates 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. However, the lens driving mechanism in the existing market involves too many parts, has a complex mounting process, is difficult to assemble, and has low yield and poor reliability.

Therefore, a driving device has advantages of small size and simple structure, and has been the direction of research and development by manufacturers.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lens actuating mechanism to solve the problem that exists among the above-mentioned prior art.

In order to solve the above problem, according to an aspect of the present invention, there is provided a lens driving mechanism, the lens driving mechanism includes a housing, a base, a carrier, a magnetic element, a coil assembly, a circuit board and a lower spring plate, the carrier is used for mounting a lens, the coil assembly is mounted on two opposite sides of the carrier, the magnetic element is mounted on the base and cooperates with the coil assembly, the lower spring plate is to the carrier and the base movably connected, the circuit board is arranged on the base and faces one of the side portions of the carrier, wherein the lower spring plate is to the circuit board and the coil assembly is electrically connected.

In one embodiment, the base includes a base plate and a mounting plate extending upwardly from the base plate a distance, the circuit board being mounted to the mounting plate.

In one embodiment, the circuit board has an inner surface towards the carrier, be equipped with sensor and electric capacity on the inner surface, the mounting panel is equipped with right the sensor that the sensor dodges the mouth with right the electric capacity that the electric capacity dodges.

In one embodiment, a winding post and a sensor magnet mounting hole are further formed in a side portion of the carrier corresponding to the circuit board, and the sensor magnet mounting hole and the winding post are respectively located at two ends of the side portion.

In one embodiment, a lens mounting hole is formed in the middle of the carrier to be mounted on a lens, a first carrier side portion, a second carrier side portion, a third carrier side portion, and a fourth carrier side portion are sequentially formed around the lens mounting hole, the first side portion and the third side portion are oppositely disposed and are used for mounting the coil assembly, and the second side portion corresponds to the circuit board and is provided with a sensor magnet mounting groove.

In one embodiment, the winding posts include a first winding post disposed on the second side portion and a second winding post disposed on the fourth side portion, the coil assembly includes a first coil mounted on the first side portion and a second coil mounted on the third side portion, an end of the first coil is wound on the first winding post, and an end of the second coil is wound on the second winding post.

In one embodiment, the lower spring plate comprises two independent parts, each part comprises at least two base connecting parts and at least two carrier connecting parts, one of the base connecting parts comprises a notch, and a base fixing plate and a circuit board connecting part which are respectively arranged at two sides of the notch, the circuit board connecting part is electrically connected with the circuit board, and the base fixing plate is fixedly connected with the base.

In one embodiment, four corners of the base are provided with support posts, and the notches of the lower spring are matched with the support posts.

In one embodiment, a base embedded metal sheet is arranged in the base, the base embedded metal sheet comprises a contact piece, the bottom plate is provided with a contact piece hole, the contact piece is located in the contact piece hole, and when the lower spring piece is installed on the base, the circuit board connecting part is in contact with the contact piece.

In one embodiment, the lens driving mechanism further includes a housing, a top of the housing is provided with a top opening to match with the lens, a plurality of bending portions are provided around the top opening, and the carrier is provided with a straight groove surrounding the lens mounting hole and extending along the optical axis direction, and the bending portions extend into the straight groove.

In one embodiment, the lens driving mechanism further comprises an upper spring, the upper spring comprises an outer ring fixedly connected with the shell and an inner ring connected with the upper surface of the carrier, and the outer ring and the inner ring are connected through an elastic strip.

In one embodiment, the lens driving mechanism further comprises a frame having a rectangular frame structure and disposed between the upper spring and the housing, wherein each corner of the frame is provided with at least two overflow holes for overflowing glue.

In one embodiment, four corners of the upper surface of the housing are provided with sunken parts, and the outer ring of the upper spring plate is fixedly connected with the lower surfaces of the sunken parts through the frame.

In one embodiment, the base is further provided with baffles disposed on opposite sides of the mounting plate.

In one embodiment, the housing forms a rectangular structure and has an open space at a lower portion thereof for accommodating the carrier and cooperating with the base, the top portion of the housing has a top opening for cooperating with the lens, and a plurality of bending portions extending in a vertical direction are provided around the top opening and cooperate with the straight grooves on the carrier.

In one embodiment, four corners of the top surface of the housing are provided with housing sinkers that mate with support posts provided at four corners of the base.

In one embodiment, the housing sinker has a substantially triangular configuration with a bottom surface parallel to the upper surface of the housing and a side surface perpendicular to the bottom surface, with an integral outwardly projecting protrusion on the side surface.

In one embodiment, the bent portion is disposed inside the sunken portion and integrally bent downward from an inner edge of the top opening.

In one embodiment, the width of the end of the bending part close to the top opening is smaller, and the width of the end of the bending part far away from the top opening is larger.

In one embodiment, the housing has a first side, a second side, a third side and a fourth side, the first side is a motor output side, which is engaged with the first side of the base and provided with a buckle at a bottom near one end of the fourth side of the housing, the buckle being bent from an outer side to an inner side to fix the base.

In one embodiment, the bottom of the first side portion is further provided with two downward protruding protrusions, and the two protrusions are arranged near two ends of the first side portion to match with the notches on the first side portion of the base.

In one embodiment, the second side of the housing is a circuit board mounting side and is configured to mate with a second side of the base, and a bottom of the second side of the housing is provided with a notch that mates with a circuit board interface of a metal sheet embedded in the base.

In one embodiment, the third side of the housing is opposite to the first side of the housing, and a bottom of the third side of the housing integrally extends downward to form a protrusion, the protrusion occupies a larger area of the bottom, and the fourth side corresponds to the baffle on the base, and two protruding blocks are arranged on the bottom to match with corresponding structures on the base.

In one embodiment, a frame is further arranged inside the housing, and four corners of the frame are matched with the sunken part of the housing and fixedly connect an upper spring plate of the lens driving mechanism with the housing.

In one embodiment, the carrier is used for mounting a lens and has a carrier upper surface facing the housing and a carrier lower surface facing the base, the carrier upper surface is provided with a plurality of upper reed connecting parts, and a straight groove is provided adjacent to the upper reed connecting parts, the straight groove extends from the carrier upper surface to the carrier lower surface and is matched with the bent part of the housing.

In one embodiment, a lens mounting hole is formed in the middle of the carrier to mount a lens, and a first carrier side portion, a second carrier side portion, a third carrier side portion and a fourth carrier side portion are formed around the lens mounting hole, wherein the first carrier side portion and the third carrier side portion are oppositely arranged and are respectively provided with a first coil mounting portion and a second coil mounting portion to mount a first coil and a second coil of the lens driving mechanism.

In one embodiment, the coil mounting part includes a plurality of protrusions integrally protruding outward from the first side part and the third side part, and the first coil and the second coil are wound on the plurality of protrusions.

In one embodiment, the second side portion corresponds to a circuit board and is provided with a sensor magnet mounting groove for mounting a sensor magnet of the lens driving mechanism.

In one embodiment, the second side portion further has a first winding post, and the sensor magnet mounting groove and the first winding post are respectively disposed at two ends of the second side portion, wherein the first winding post is disposed at an end close to the first side portion to fix an end of the first coil, and the sensor magnet mounting groove is disposed at an end close to the third side portion.

In one embodiment, the fourth side of the carrier is opposite to the second side of the carrier and is matched with the baffle on the base, a second winding post is arranged at one end of the fourth side close to the third side, and the end of the second coil is fixed on the second winding post.

In one embodiment, the lower surface of the carrier is provided with a plurality of lower spring fixing posts to be connected with an inner ring of a lower spring of the lens driving mechanism.

In one embodiment, one of the lower spring fixing posts is disposed adjacent to the first wrapping post, and the other lower spring fixing post is disposed adjacent to the second wrapping post.

In one embodiment, the upper surface of the carrier is further provided with upper surface protruding parts, and the upper surface protruding parts are respectively arranged on two sides of the straight groove on the upper spring fixing part.

In one embodiment, the upper surface of the carrier is further provided with a carrier sinking portion, and the carrier sinking portion is arranged on the outer side of the straight groove.

In one embodiment, the chassis includes a base plate forming a rectangular structure and having an opening formed in a middle thereof to be fitted into a lens mounting hole of a carrier, support columns formed at four corners of the base plate and extending upward from the base plate by a certain distance, a mounting plate provided at one of side portions of the base plate and extending upward from the base plate by a certain distance, and the circuit board mounted on the mounting plate.

In one embodiment, the outer side of the support column is formed with a notch for mounting a housing, and the inner side of the support column is formed with a damping glue groove for accommodating damping glue.

In one embodiment, a step part is formed on the inner side of the supporting column, and the upper surface of the step part is downwards recessed to form the damping rubber groove.

In one embodiment, two damping rubber grooves are formed on the step portion, and each damping rubber groove is an arc-shaped groove.

In one embodiment, the base surrounds the opening to form a base first side portion, a base second side portion, a base third side portion and a base fourth side portion, the base first side portion and the base third side portion are used for installing a first magnetic element and a second magnetic element respectively, the second side portion is provided with the installation plate, and the fourth side portion is opposite to the second side portion and provided with a baffle plate.

In one embodiment, the base is provided with a spring fixing column at two ends of the first side part and the fourth side part, a positioning hole is arranged adjacent to the spring fixing column, and preferably, the inner side and the outer side of the spring fixing column are respectively provided with one positioning hole.

In one embodiment, the one end that the mounting panel is close to the first lateral part is equipped with electric capacity and dodges the mouth in order to with electric capacity cooperation on the circuit board, and the one end that the mounting panel is close to the third lateral part is equipped with the sensor and dodges the mouth in order to cooperate with the sensor of circuit board.

In one embodiment, a circuit board positioning column is arranged in the middle of the mounting plate, the positioning hole of the circuit board is correspondingly matched with the circuit board positioning column so as to fixedly mount the circuit board on the mounting plate, in one embodiment, a groove extending from top to bottom is formed in the middle of the mounting plate, and the circuit board positioning column is arranged in the groove.

In one embodiment, the capacitor avoidance opening extends from the top to the bottom of the mounting plate and forms an opening above, and/or the side wall of the capacitor avoidance opening adjacent to the mounting plate forms an arc-shaped side wall.

In one embodiment, the base is further provided with a base embedded metal sheet, the base embedded metal sheet comprises a contact piece, both ends of the second side portion are further provided with contact piece holes, and the contact piece is arranged in the contact piece holes; preferably, the contact pad hole is disposed adjacent to one of the support posts.

In one embodiment, the metal sheet embedded in the base has a ring-shaped body, two adjacent side portions of the ring-shaped body are respectively provided with an access end and a circuit board connecting end, the circuit board connecting end comprises a plurality of protruding sheets, and the bottom of the circuit board is provided with a plurality of openings matched with the protruding sheets.

In one embodiment, the contact pieces are arranged at two ends of the side part of the metal sheet embedded in the base, wherein the side part is provided with the plurality of protruding pieces.

The utility model discloses a camera lens actuating mechanism compares with traditional drive module, has small, power consumption is low, the displacement is accurate, the cost of manufacture is low advantage.

Drawings

Fig. 1 is an exploded perspective view of a lens driving mechanism according to an embodiment of the present invention;

fig. 2 is a perspective view of a housing according to an embodiment of the present invention;

FIGS. 3-6 are front views of different sides of the housing of FIG. 2, respectively;

figure 7 is a top view of an upper spring plate according to an embodiment of the present invention;

figures 8-9 are perspective views, respectively, of different perspectives of a carrier according to one embodiment of the present invention;

figure 10 is a perspective view of a lower spring plate in accordance with an embodiment of the present invention;

fig. 11 is a perspective view of a base according to an embodiment of the present invention;

fig. 12 is a perspective view of a metal sheet embedded in a base according to an embodiment of the present invention;

FIG. 13 is a perspective view of the assembly with the circuit board bonded to the base insert metal sheet;

fig. 14 is a sectional view of a lens driving mechanism according to an embodiment of the present invention; and

fig. 15 is another cross-sectional view of the lens driving mechanism according to an embodiment of the present invention, in which the housing is removed.

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

Fig. 1 is an exploded perspective view of a lens driving mechanism 100 according to an embodiment of the present invention, and as shown in fig. 1, the lens driving mechanism 100 generally includes a housing 10, a frame 20, an upper spring 30, a carrier 40, a lower spring 50, a base 60, a base embedded metal sheet 70, a first coil 81, a first magnet 82, a second coil 83, a second magnet 84, a circuit board 91, a sensor magnet 92, and a sensor magnet spacer 93. The first magnet 82 and the second magnet 84 are fixedly mounted on two opposite sides of the base 60, the first coil 81 and the second coil 83 are respectively mounted on two opposite sides of the carrier 40 and correspond to the first magnet 81 and the second magnet 84 fixedly mounted on the base 60, the sensor magnet 92 and the sensor magnet pad 93 are mounted on one side portion of the carrier 40 where the first coil 81 and the second coil 83 are not mounted, and the circuit board 91 is mounted on one side portion of the base 40 where the first magnet 82 and the second magnet 84 are not mounted and which corresponds to the side portion of the carrier 40 where the sensor magnets are mounted.

The circuit board 91 is provided with a sensor corresponding to the sensor magnet 92. The base embedded metal sheet 70 is installed in the base 60 and electrically connected to the circuit board 91, the circuit board 91 is electrically connected to the first coil 81 and the second coil 82, the upper spring 30 movably connects the carrier 40 to the housing 10, the lower spring 50 movably connects the carrier 40 to the base 60, and the frame 20 is disposed between the upper spring 30 and the housing 10. The frame 20, the upper spring plate 30, the carrier 40, the lower spring plate 50, the first coil 81, the first magnet 82, the second coil 83, the second magnet 84, the circuit board 91, the sensor magnet 92, and the sensor magnet spacer 93 are integrally mounted in a space defined by the base 60 and the housing 10. The current enters the circuit board 91 through the base insert metal sheet 70 and then enters the first coil 81 and the second coil 83 through the circuit board 91. The first coil 81 and the second coil 83, which are energized, are subjected to a magnetic force in the magnetic fields generated by the first magnet 82 and the second magnet 84, thereby moving the carrier 40 in the optical axis direction. By changing or adjusting the direction or magnitude of the current in the first coil 81 and the second coil 83, the rhythm and direction of the movement of the carrier 40 in the optical axis direction can be controlled.

The respective components of the lens driving mechanism 100 shown in fig. 1 will be described in detail below with reference to the drawings.

Fig. 2 is a perspective view of the housing 10. As shown in fig. 2, the housing 10 is formed in a rectangular structure as a whole and is provided with an open space at a lower portion to accommodate the carrier 40 and the like and to be engaged with the mount 60, and the top of the housing 10 is provided with a top opening 11 to be engaged with a lens (not shown). A plurality of bends 12 are provided around the top opening 11, the plurality of bends 12 cooperating with the straight grooves on the carrier 40 to enhance the connection of the housing 10 to the carrier 40. Four corners of the top surface of the housing 10 are provided with housing sunken portions 13, and the housing sunken portions 13 are engaged with support posts 63 at four corners of the base 60.

In one embodiment, the housing sinker 13 has a substantially triangular structure and has a bottom surface 131 substantially parallel to the upper surface of the housing 10, a protrusion 132 protruding outward from a side surface substantially perpendicular to the bottom surface 131, and a recess 133 formed where the protrusion 132 is connected to the side surface. In one embodiment, the top opening 11 is circular, and the bent portion 12 corresponds to the position of the sunken portion 13, that is, the line connecting the bent portion 12 and the sunken portion 13 substantially passes through the center of the top opening 11 of the housing 10. In other words, the bent portion 12 is disposed at a position of the central opening 11 corresponding to the sinking portion 13 and is integrally bent and extended downward from the inner edge of the top opening 11. The width of the upper end of the bent portion 12 (i.e., the end closer to the top opening 11) is smaller, and the width of the lower end of the bent portion 12 (i.e., the end away from the top opening 11) is larger. The bent portion 12 preferably has a thickness corresponding to that of the top of the case.

Fig. 3-6 are front views of different sides of the housing 10, respectively. As shown in fig. 3-6, the housing 10 has a first side 14, a second side 15, a third side 16 and a fourth side 17, wherein the first side 14 is a motor output side, and is engaged with the first side of the base 60 and has a buckle 141 at an end near the fourth side 17, and the buckle 141 is bent from the outside to the inside to fix the base 60 and the housing 10 after the housing 10 is installed on the base 60. The first side portion 14 is further provided with two protrusions 142, and the two protrusions 142 are disposed near two ends of the first side portion 14 to match with the notches on the first side portion of the base 60. The second side portion 15 is a circuit board mounting side and is used for matching with the second side portion on the base 60, a notch 151 is formed at the bottom of the second side portion 15, and the notch 151 is matched with a circuit board interface of the base embedded metal sheet 70. The third side portion 16 is arranged opposite to the first side portion 14, and the bottom of the third side portion 16 integrally extends downward to form a protrusion 161, and the protrusion 161 occupies a large area of the bottom. The fourth side 17 corresponds to the stop on the base 60 and is provided with two projections 171 on the bottom to engage corresponding formations on the base.

Referring back to fig. 1, the frame 20 has a rectangular frame structure as a whole and is disposed between the upper spring 20 and the housing 10, and specifically, four corners of the frame 20 are fitted with the depressed portion 13 of the housing 10 and provided with overflow holes 21 to overflow the glue. Preferably, each corner of the frame 20 is provided with at least two overflow holes 21, the two overflow holes 21 preferably being substantially right triangular in shape.

Fig. 7 is a plan view of the upper spring 30. As shown in fig. 7, the upper spring 30 integrally includes an outer ring 30A and an inner ring 30B, the inner ring 30B is provided with a carrier fixing portion 31 and the outer ring 30A is provided with a housing fixing portion 32, and the carrier fixing portion 31 and the housing fixing portion 32 are movably connected by an elastic member 33. The inner ring is provided with a plurality of carrier fixing portions 31, and the plurality of carrier fixing portions 31 are connected to each other by an inner ring connecting portion 34. In one embodiment, the inner ring connecting portion 34 is integrally formed with the carrier fixing portion 31, the carrier fixing portion 31 is formed in a plate shape and provided with a plurality of small holes, and the inner ring connecting portion 34 is in a strip shape, preferably, uniform in thickness. The whole inner ring forms a ring structure. The outer ring of the upper spring 30 is formed in a rectangular shape as a whole, the housing fixing portions 32 are located at four corners, and the two housing fixing portions 32 are connected to each other by an outer ring connecting portion 35. The elastic member 33 has one end connected to the carrier fixing portion 31 and the other end connected to the case fixing portion 32, and the elastic member 33 is preferably integrally formed with the carrier fixing portion 31 and the case fixing portion 32. In one embodiment, the elastic member 33 is an elastic strip, which is bent at least once at an end near the housing fixing portion 32, thereby forming an "S" shaped structure as a whole, so that the carrier fixing portion 31 can move relative to the housing fixing portion 32.

Fig. 8-9 are perspective views of carrier 40 from different perspectives, respectively. As shown in fig. 8 to 9, the carrier 40 is used to carry a lens and is provided with a lens mounting hole 41 in the middle, and a lens (not shown) is mounted in the lens mounting hole 41. The carrier first side 42, the carrier second side 43, the carrier third side 44, and the carrier fourth side 45 are formed around the lens mounting hole 41, and the carrier 40 has a carrier upper surface 46 facing the housing 10 and a carrier lower surface 47 facing the mount 60. The carrier upper surface 46 is provided with a plurality of upper spring connecting portions 461, and a straight slot 462 is provided adjacent to the upper spring connecting portions 461, the straight slot 462 extending from the carrier upper surface 46 to the carrier lower surface 47 and engaging with the bent portion 12 on the housing 10. Specifically, the bent portion 12 of the housing 10 extends into the straight groove 462, thereby restricting the relative movement of the housing 10 and the carrier 40 within a certain direction and range. An upper surface protrusion 463 is provided at the other side of the straight groove 462, and the upper surface protrusion 463 and the upper spring mounting portion 461 are located at both sides of the straight groove 462, respectively, and are preferably symmetrically provided. The outer side of the straight slot 462 is provided with a carrier dip 464, and the carrier dip 464 may be provided with indicia such as direction to facilitate the determination of the carrier mounting direction by automated equipment.

The first and third side portions 42 and 44 are oppositely disposed and provided with first and third coil mounting parts 421 and 441, respectively, the first coil 81 is wound on the first coil mounting part 421, and the second coil 83 is wound on the second coil mounting part 441. The first and second coil mounting parts 421 and 441 include a plurality of protrusions integrally protruding outward from the first and third side portions 42 and 44, on which the coil is wound. The second side portion 43 corresponds to the circuit board 91 and is provided with a sensor magnet mounting groove 431 and a first winding post 432, the sensor magnet mounting groove 431 and the first winding post 432 are respectively disposed at two ends of the second side portion 43, wherein the first winding post 432 is disposed at one end close to the first side portion 42, and an end portion of the first coil 81 wound on the coil mounting portion 421 of the first side portion 42 is fixed on the first winding post 432. A sensor magnet mounting groove 431 is provided at an end near the third side 44, and a sensor magnet is mounted in the sensor magnet mounting groove 431 and cooperates with the sensor 911 on the circuit board 91 to detect displacement information of the carrier 40. The third side portion 44 is opposite to the first side portion 42 and is provided with a second coil mounting part 441, the second coil mounting part 441 including a plurality of protrusions integrally protruding outward from the third side portion 44, and the second coil 83 is wound around the plurality of protrusions. The fourth side 45 is opposite to the second side 43 and is used for matching with the baffle on the base 60, one end of the fourth side 45 close to the third side 44 is provided with a second winding post 451, and the end of the second coil 83 wound on the second coil mounting part 441 of the third side 44 is fixed on the second winding post 451.

Referring to fig. 9, the lower surface 47 of the carrier 40 is provided with a plurality of lower spring fixing posts 471 to be coupled with the inner circumference of the lower spring 50. The lower reed fixing column 471 is used for fixing the lower reed, and the lower reed is fixed by hot riveting after being installed. Lower spring fixing posts 471 are integrally formed to protrude downward from the lower surface 47 of the carrier 40, one of the lower spring fixing posts 471 being disposed adjacent to the first winding post 432, and the other lower spring fixing post 471 being disposed adjacent to the second winding post 451, so as to electrically connect the base insert metal sheet 70, the circuit board 91, and the first coil 81 and the second coil 83 through the lower spring 50.

Fig. 10 is a perspective view of lower spring 50. As shown in FIG. 10, lower spring 50 integrally comprises lower spring first portion 51 and lower spring second portion 52 which are independent of each other, and lower spring first portion 51 and lower spring second portion 52 are similar in structure and shape. The lower reed first part 51 is formed in an arc-shaped structure as a whole, and has a first base connection portion 511 formed at one end of the arc-shaped structure, a second carrier connection portion 512 formed at the other end of the arc-shaped structure, a first carrier connection portion 513 formed at a substantially middle portion of the arc-shaped structure, a second base connection portion 514 formed at a substantially middle portion of the arc-shaped structure and extending from the second carrier connection portion 512 back to the middle portion along the arc-shaped structure, the second base connection portion 514 being adjacent to the first carrier connection portion 513 and located outside the first carrier connection portion 513. The first base connection portion 511 and the first carrier connection portion 513, and the first carrier connection portion 513 and the second carrier connection portion 512 are connected by an elastic strip, the second carrier connection portion 512 and the second base connection portion 514 are connected by an elastic strip, and the elastic strip connecting the second carrier connecting portion 512 and the second base connecting portion 514 is bent at least twice at a position close to the second base connecting portion 514 to form at least one S-shaped structure, and the elastic strip connecting the first base connection part 511 and the first carrier connection part 513 is bent at least twice at a position close to the first base connection part 511 to form at least one S-shaped structure, so that the base connection part and the carrier connection part can perform relative movement, so that the base can move relative to the carrier after the base link and the carrier link are coupled to the base and the carrier, respectively.

With continued reference to fig. 10, the first base coupling portion 511 includes a first recess 5111 at the middle and first fixing pieces 5112 at both sides of the first recess 5111, the first fixing pieces 5112 being provided with first base fixing holes 5113, wherein the first recess 5111 is preferably provided in a rectangular shape and the first fixing pieces 5112 is preferably provided in a substantially triangular shape. The second base connecting portion 514 includes a second recess 5141 at the middle portion, and a second base fixing piece 5142 and a circuit board connecting portion 5143 at both sides of the second recess 5141, preferably, the base fixing piece 5142 and the circuit board connecting portion 5143 are symmetrically disposed about the second recess 5141 and have similar shapes, wherein a second base fixing hole 5144 is provided on the second base fixing piece 5142, and the circuit board connecting portion 5143 is engaged with a 733 contact of the base embedded metal sheet 70 passing through the contact hole 675 of the base 60 to electrically communicate with the circuit board 91 through the base embedded metal sheet 70.

The first carrier connecting portion 513 is integrally formed in a block shape and provided with a first carrier fixing hole 5131, the second carrier connecting portion 512 is integrally formed in a block shape and provided with a second carrier fixing hole 5121 and a coil connecting portion 5122, and the coil connecting portion 5122 is integrally formed to extend from an edge of the second carrier connecting portion 512. The coil connection portion 5122 is connected to an end portion of the coil wound on the bobbin of the carrier, thereby being electrically connected to the coil mounted on the carrier.

Similarly, the lower spring second part 52 is integrally formed into an arc-shaped structure and has a first base connection portion 524 formed at one end of the arc-shaped structure, a second carrier connection portion 522 formed at the other end of the arc-shaped structure, a first carrier connection portion 523 formed at a substantially middle portion of the arc-shaped structure, and a second base connection portion 521 formed at a substantially middle portion of the arc-shaped structure and extending from the second carrier connection portion 522 back toward the middle portion along the arc-shaped structure. The first chassis link 524 and the first carrier link 523, and the first carrier link 523 and the second carrier link 522 are connected by an elastic strip, the second carrier link 522 and the second chassis link 521 are connected by an elastic strip, and the elastic strip connecting the second carrier connecting part 522 and the second base connecting part 521 is bent at least twice at a position close to the second base connecting part 521 to form at least one "S" shaped structure, and the elastic strip connecting the first base connection part 524 and the first carrier connection part 523 is bent at least twice at a position close to the first base connection part 524 to form at least one "S" -shaped structure, so that the base connection part and the carrier connection part can perform relative movement, so that the base can move relative to the carrier after the base link and the carrier link are coupled to the base and the carrier, respectively.

With continued reference to fig. 10, the first base coupling part 524 includes a first fixing piece 5242 and a circuit board coupling part 5243 located at both sides of the first recess 5241 and the first recess 5241 in the middle, the first fixing piece 5242 is provided with a first base fixing hole 5244, wherein the first recess 5241 is preferably provided in a rectangular shape, the first fixing piece 5242 is preferably provided in a substantially triangular shape, the first base fixing piece 5242 and the circuit board coupling part 5243 are symmetrically provided about the first recess 5241 and have similar shapes, wherein the first base fixing hole 5244 is provided in the first base fixing piece 5242, and the circuit board coupling part 5243 is engaged with a contact of the base insert metal piece 70 passing through the contact hole 675 of the base 60 so as to be electrically communicated with the circuit board 91 through the base insert metal piece 70. The second base coupling part 521 includes a second recess 5211 at the middle and second base fixing pieces 5212 at both sides of the second recess 5211, the second base fixing pieces 5212 are provided with second base fixing holes 5213, the second recess 5211 is preferably provided in a rectangular shape, and the second fixing pieces 5212 are preferably provided in a substantially triangular shape. The first carrier connecting portion 523 is integrally formed in a block shape and provided with a first carrier fixing hole 5231, the second carrier connecting portion 522 is integrally formed in a block shape and provided with a second carrier fixing hole 5221 and a coil connecting portion 5222, and the coil connecting portion 5222 is integrally formed to protrude from an edge of the second carrier connecting portion 522. The coil connecting portion 5222 is connected to a coil wire wound on the carrier winding post, thereby supplying power to the coil mounted on the carrier.

With continued reference to fig. 10, second carrier coupling portion 522 of lower spring second portion 52 is disposed adjacent to first base coupling portion 511 of lower spring first portion 51, and first base coupling portion 524 of lower spring second portion 52 is disposed adjacent to second carrier coupling portion 512 of lower spring first portion 51, such that lower spring 50 as a whole forms a circular arc-shaped configuration and includes two first carrier coupling portions and two second carrier coupling portions at the inner circumference, and two first base coupling portions and two second base coupling portions at the outer circumference. The inner ring and the outer ring are connected through the bent elastic strip, so that the inner ring and the outer ring can elastically deform and move relatively, and the base and the carrier connected through the lower reed can also move relatively.

Specifically, the lower reed first part 51 is mounted to the bottom of the third and second side portions of the carrier 40 and the third and second side portions of the base 60, the lower reed second part 52 is mounted to the bottom of the fourth and first side portions of the carrier 40 and the bottom of the fourth and first side portions of the base 60, the first carrier fixing hole 5131 and the second carrier fixing hole 5121 of the lower reed first part 51 are fitted to the lower reed fixing posts 471 of the third and second side portions of the carrier 40, the first carrier fixing hole 5231 and the second carrier fixing hole 5221 of the second part 52 are fitted to the lower reed fixing posts 471 of the fourth and first side portions of the carrier 40, the first base fixing hole 5113 of the lower reed first part 51 is fitted to the reed fixing posts 692 of the fourth side portion and the reed fixing posts 682 of the third side portion of the base 60, the second base fixing hole 5144 of the lower reed first part 51 is fitted to the reed fixing posts 682 of the third side portion, the circuit board mounting portion 5413 of the lower spring first portion 51 mates with the contact hole 675 of the second side of the base 60 near one end of the third side. First base fixing hole 5244 of lower spring second portion 52 is fitted with spring fixing post 661 provided on the first side portion of base 60, and circuit board mounting portion 5243 of lower spring second portion 52 is fitted with contact hole 675 provided on the second side portion of base 60 at the end closer to the first side portion. Second base fixing hole 5213 of lower reed second part 52 is fitted with reed fixing post 661 of the first side portion and reed fixing post 692 of the fourth side portion of base 60. Support posts 63 of base 60 are positioned within first and second recesses of first and second portions 51 and 52, respectively, of lower spring 50.

Fig. 11 is a perspective view of the base 60. The base 60 of an embodiment of the present invention is described below with reference to fig. 11. As shown in fig. 11, the base 60 integrally includes a bottom plate 61, and the bottom plate 61 is integrally formed in a rectangular structure and formed with an opening 62 at a middle portion to be fitted into the lens mounting hole 41 of the carrier 40. The bottom plate 61 is formed at four corners thereof with support posts 63, and the support posts 63 are formed to extend upward from the bottom plate 61 by a certain distance. The four support posts 63 are substantially equal in height and cooperate with the respective first and second recesses of the lower spring 50 and the housing 10 to provide support and reinforcement of the overall structure. In the illustrated embodiment, the support post 63 has a generally rectangular cross-section and is formed with an indentation 631 on the outside, the bottom of the indentation 631 being a ramp 632 to facilitate mounting of the housing 10. The inner side of the supporting column 63 is formed with a damping rubber groove 633 for accommodating damping rubber, specifically, a step portion 634 is formed at a substantially middle position of the inner side of the supporting column 63, a surface of the step portion 634 is formed with a damping rubber groove 633 recessed downwards, preferably, two damping rubber grooves 633 perpendicular to the inner side surface of the supporting column 63 are formed on each step portion 634, and each damping rubber groove 633 is an arc-shaped groove, that is, a side wall of the damping rubber groove 633 has an arc shape, so as to form a shape having a smaller bottom and a width gradually increasing from the bottom to the top.

The bottom panel 60 forms a first side 66, a second side 67, a third side 68, and a fourth side 69 around the opening 61. The first side portion 66 and the third side portion 68 are used for mounting the first magnet 82 and the second magnet 84, respectively, the second side portion 67 is used for mounting the circuit board 91, and the fourth side portion 69 is opposite to the second side portion 67 and is provided with a baffle plate 691. Specifically, the first side portion 66 is provided with a spring fixing post 661 at both ends thereof, and a positioning hole 662 is provided adjacent to the spring fixing post 661, and preferably, one positioning hole 662 is provided at each of the inner and outer sides of the spring fixing post 661. The positioning hole 662 is used for automatic equipment grabbing identification. The second side portion 67 is provided with a mounting plate 671 extending upward from the bottom plate 62, the mounting plate 671 extends upward from the bottom plate by a certain distance, the height of the mounting plate 671 is approximately equal to the height of the supporting columns 63 at the four corners, one end of the mounting plate 671 close to the first side portion 66 is provided with a capacitor avoiding port 672, one end of the mounting plate 671 close to the third side portion 68 is provided with a sensor avoiding port 673, the middle portion of the mounting plate 671 is provided with a circuit board positioning column 674, and a positioning hole of the circuit board 91 is correspondingly matched with the circuit board positioning column 674 so as to fixedly mount the circuit board 91 on the mounting plate 671. After the circuit board 91 is mounted on the mounting plate 671, the capacitor on the circuit board 91 is aligned and matched with the capacitor escape opening 672, and the sensor on the circuit board 91 is aligned and matched with the sensor escape opening 673 and is aligned with the magnet for the sensor mounted on the carrier 40. The capacitor escape opening 672 extends from the top to the bottom of the mounting plate 671 and forms an opening above, and an arc-shaped sidewall is formed on a sidewall of the capacitor escape opening 672 near the mounting plate 671. The second side 67 is further provided with contact holes 675 at both ends thereof, and when the base insert metal sheet 70 is mounted on the base 60, the contact 733 of the base insert metal sheet 70 is located in the contact holes 675, so as to be electrically connected to the circuit board 91. Preferably, the contact holes 675 are located proximate to the support posts 63 and have a shape similar to the contacts 733 of the base insert sheet metal 70. A groove 676 extending from top to bottom is formed in the middle of the mounting plate 671, the circuit board positioning post 674 is disposed in the groove 676 and is approximately located in the middle of the groove 676, the width of the lower portion of the groove 676 is smaller than the width of the upper portion, a rectangular groove is formed on the upper portion of the groove as a whole, and another rectangular groove with a smaller width is formed on the lower portion of the groove as a whole.

The third side portion 68 is opposite to the first side portion 66 and is used for mounting a magnet, and has a structure and a function similar to those of the first side portion 66, wherein two ends of the third side portion are provided with a spring fixing post 681, a positioning hole 682 is provided adjacent to the spring fixing post 681, and preferably, one positioning hole 682 is provided on each of the inner side and the outer side of the spring fixing post 681. The fourth side 69 is disposed opposite to the third side 67, and has a baffle plate 691 extending in the vertical direction, the baffle plate 691 integrally extends upward from the middle position of the fourth side 69 and has a height substantially equal to the height of the support posts 63 at the four corners and the mounting plate 671 on the second side, which enhances the overall strength of the base. The fourth side portion 69 has two ends similar to the first and third side portions, the two ends are provided with a spring fixing post 692, the two ends are provided with positioning holes 693 adjacent to the spring fixing post 692, and preferably, the two sides of the spring fixing post 692 are respectively provided with one positioning hole 693.

Fig. 12 is a perspective view of a chassis embedded metal sheet, and fig. 13 is a perspective view of an assembly in which a circuit board is bonded to the chassis embedded metal sheet. As shown in fig. 12 to 13, the base insert metal sheet 70 is disposed in the base 60 and has a ring-shaped main body 71, two adjacent side portions of the main body 71 are respectively provided with an access end 72 and a circuit board connecting end 73, the circuit board connecting end 73 includes a plurality of protruding pieces 731, an opening 732 is defined between the plurality of protruding pieces 731, the bottom of the circuit board 91 is provided with an opening which is matched with the protruding pieces 731, and the circuit board 91 is connected with the base insert metal sheet by inserting the protruding pieces 731 of the base insert metal sheet 70 into the bottom opening of the circuit board 91. The ends of the plurality of protruding pieces 731 are substantially in the same straight line, and contact pieces 733 are provided at both ends of the side portion of the base-embedded metal piece 70 where the plurality of protruding pieces are provided, the contact pieces 733 are fitted into contact piece holes 675 in the base 60, and when the base-embedded metal piece 70 is mounted in the base 60, the contact pieces 733 are located in the contact piece holes 675 and are used for electrical connection with the coil. The inlet 72 is disposed at a side portion adjacent to the circuit board connection end 73 and includes a plurality of inlet pieces 72 to be connected with an external circuit. At least two protruding portions 74 are provided at the side of the chassis embedded metal sheet 70 opposite to the circuit board connection end 73 to reinforce the strength of the chassis 60.

Referring to fig. 13, the circuit board 91 is mounted on the base 60 and is matched with the base embedded metal sheet 70, specifically, the circuit board 91 is integrally formed into a rectangular structure and has an inner surface facing the carrier and an outer surface facing the housing, the inner surface is provided with a sensor 911 and a capacitor 912, the sensor 911 is aligned with a sensor avoiding opening 673 on the base 60 and is correspondingly matched with the sensor magnet 92 mounted on the carrier 40, and the capacitor 912 is correspondingly matched with a capacitor avoiding opening 672 on the base 60. The bottom of the circuit board 91 is provided with a plurality of openings 913, and the openings 913 cooperate with the protruding pieces 731 of the base embedded metal sheet 70 to clamp the circuit board 91 on the base embedded metal sheet 70 while providing circuit connection. The contact 733 of the base insert sheet metal 70 is located outside both ends of the circuit board 91.

Fig. 14 is a sectional view of the lens driving mechanism 100 according to an embodiment of the present invention, and fig. 15 is another sectional view of the lens driving mechanism 100 according to an embodiment of the present invention, in which the housing is removed. As shown in fig. 14 to 15, when mounting, the frame 20 is located between the upper surface of the upper spring 30 and the lower surface of the housing 20, the outer ring and the inner ring of the upper spring 30 are fixedly connected to the bottom of the housing and the top of the carrier, respectively, the bent portion 12 of the housing 10 extends into the straight groove 462 of the carrier 40, the outer ring and the inner ring of the lower spring 50 are fixedly connected to the lower surfaces of the base 60 and the carrier 40, respectively, the base insert metal sheet 70 is mounted in the base 60, the first magnet 82 and the second magnet 84 are mounted on the first side portion 66 and the second side portion 68 of the base 60, respectively, the first coil 81 and the second coil 83 are mounted on the first side portion 42 and the third side portion 44 of the carrier 40, respectively, and the sensor magnet 92 and the sensor magnet spacer 93 are mounted in the sensor magnet mounting groove 431 of the second side portion of the carrier 40. The circuit board 91 is mounted on the second side 67 of the base 60, the support posts 63 at the four corners of the base 60 are engaged with the sunken parts 13 of the housing 10, and the bent parts 12 of the housing 10 are inserted into the straight slots 462 of the carrier 40 to prevent inward rotation and inclination during driving. The catch 141 snaps into the lower surface of the base 60. In operation, an external current passes through the connection terminal 72 of the base insert metal sheet 70, passes through the base insert metal sheet 70, reaches the circuit board 91, and is electrically connected to the first coil 81 and the second coil 82 via the contact sheet 733, the circuit board connection portion of the lower spring 50, and the coil connection portion. The first and second coils energized move the carrier 40 in the optical axis direction by the magnetic force of the first and second magnets 82 and 84, and the sensor 911 detects the displacement of the carrier by sensing the displacement of the sensor magnet 92 and transmits the displacement information to a control unit (not shown).

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

Claims (14)

1. The lens driving mechanism is characterized by comprising a shell, a base, a carrier, magnetic elements, a coil assembly, a circuit board and a lower reed, wherein the carrier is used for mounting a lens, the coil assembly is mounted on two opposite sides of the carrier, the magnetic elements are mounted on the base and matched with the coil assembly, the carrier is movably connected with the base through the lower reed, the circuit board is arranged on the base and faces one side of the carrier, and the circuit board is electrically connected with the coil assembly through the lower reed.

2. The lens driving mechanism according to claim 1, wherein the base includes a base plate and a mounting plate formed to extend upward from the base plate by a certain distance, the circuit board being mounted on the mounting plate.

3. The lens driving mechanism according to claim 2, wherein the circuit board has an inner surface facing the carrier, the inner surface is provided with a sensor and a capacitor, and the mounting plate is provided with a sensor avoidance port for avoiding the sensor and a capacitor avoidance port for avoiding the capacitor.

4. The lens driving mechanism according to claim 3, wherein a side portion of the carrier corresponding to the circuit board is further provided with a winding post and a sensor magnet mounting hole, and the sensor magnet mounting hole and the winding post are respectively located at both ends of the side portion.

5. The lens driving mechanism according to claim 4, wherein a lens mounting hole is provided in a middle portion of the carrier to mount to a lens, a first carrier side portion, a second carrier side portion, a third carrier side portion, and a fourth carrier side portion are formed in this order around the lens mounting hole, the first side portion and the third side portion are disposed opposite to each other and mount the coil assembly, and the second side portion corresponds to the circuit board and is provided with a sensor magnet mounting groove.

6. The lens driving mechanism as claimed in claim 5, wherein the winding posts include a first winding post disposed on the second side portion and a second winding post disposed on the fourth side portion, the coil assembly includes a first coil mounted on the first side portion and a second coil mounted on the third side portion, an end of the first coil is wound on the first winding post, and an end of the second coil is wound on the second winding post.

7. The lens driving mechanism according to claim 1, wherein the lower spring plate comprises two parts independent of each other, each of the two parts comprising at least two base connecting portions and at least two carrier connecting portions, one of the base connecting portions comprising a recess and a base fixing piece and a circuit board connecting portion respectively provided on both sides of the recess, the circuit board connecting portion being electrically connected to the circuit board, the base fixing piece being fixedly connected to the base.

8. The lens driving mechanism according to claim 7, wherein four corners of the base are provided with support columns, and the notches of the lower spring pieces are engaged with the support columns.

9. The lens driving mechanism according to claim 2, wherein a base-embedded metal plate is provided in the base, the base-embedded metal plate includes a contact piece, the base plate is provided with a contact piece hole, the contact piece is located in the contact piece hole, and the circuit board connecting portion is in contact with the contact piece when the lower spring piece is mounted on the base.

10. The lens driving mechanism as claimed in claim 5, further comprising a housing, wherein a top of the housing has a top opening for engaging with the lens, a plurality of bending portions are disposed around the top opening, and the carrier has a straight groove surrounding the lens mounting hole and extending along the optical axis direction, the bending portions extending into the straight groove.

11. The lens driving mechanism according to claim 1, further comprising an upper spring plate including an outer ring for fixed connection with the housing and an inner ring for connection with an upper surface of the carrier, wherein the outer ring and the inner ring are connected by an elastic strip.

12. The lens driving mechanism according to claim 11, further comprising a frame having a rectangular frame structure and disposed between the upper spring and the housing, wherein each corner of the frame is provided with at least two overflow holes to overflow the glue.

13. The lens driving mechanism according to claim 12, wherein four corners of the upper surface of the housing are provided with depressed portions, and the outer ring of the upper spring is fixedly connected to the lower surfaces of the depressed portions through the frame.

14. A lens driving mechanism according to claim 2, wherein the base is further provided with a baffle plate provided on an opposite side of the mounting plate.

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