CN213957722U

CN213957722U - Lens driving mechanism

Info

Publication number: CN213957722U
Application number: CN202120204789.8U
Authority: CN
Inventors: 彭坤; 林聪�; 刘富泉; 吕新科; 其他发明人请求不公开姓名
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-08-13
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a camera lens actuating mechanism, including carrier, frame, last reed, lower reed, magnet group, bottom circuit board and lateral part circuit board. The carrier is used for mounting the lens and is wound with a coil. The frame is provided with a central opening and is provided with a slot extending along the direction of the optical axis, the side circuit board is arranged in the slot and surrounds the central opening together with the magnet group, and the carrier is arranged in the central opening. The lower reed movably connects the lower surface of the frame and the carrier, and the upper reed movably connects the upper surface of the frame and the carrier. The bottom circuit board is arranged at the bottoms of the frame and the carrier, and current is guided to the lower reed through the side circuit board and then guided to the coil of the carrier through the lower reed so as to drive the carrier to move along the direction of the optical axis. The utility model discloses a camera lens actuating mechanism has simple structure, and the circuit is stable, simple to operate swift technological effect.

Description

Lens driving mechanism

Technical Field

The utility model relates to an optical imaging equipment technical field, concretely relates to camera lens actuating mechanism.

Background

Along with smart mobile phone's a large amount of popularizations, cell-phone camera's range of application is bigger and bigger, however, the sensor of cell-phone camera is mostly laid in the module outside the motor at present, and side FPC adopts flexible circuit board, produces perk scheduling problem, and sensor detection is unstable, and side FPC adopts flexible circuit board simultaneously, and the installation unevenness can influence actual motion stroke.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a camera lens actuating mechanism to solve the side FPC perk, the sensor detects unstable problem.

In order to solve the above problems, according to an aspect of the present invention, there is provided a lens driving mechanism, the lens driving mechanism includes a carrier, a frame, an upper spring, a lower spring, a magnet, a bottom circuit board, and a side circuit board, the carrier is used for mounting a lens and is wound with a coil, the frame has a central opening and is provided with a slot extending in an optical axis direction, the side circuit board is disposed in the slot and surrounds the central opening with the magnet, the carrier is disposed in the central opening, the lower spring movably connects the frame with a lower surface of the carrier, the upper spring movably connects the frame with an upper surface of the carrier, the bottom circuit board is disposed at bottoms of the frame and the carrier, a current is guided to the lower spring through the side circuit board and then guided to the coil of the carrier through the lower spring, thereby achieving vertical movement of the carrier.

In one embodiment, the frame has four frame sides, one of which is provided with the slots and the other three of which are provided with the magnet packs.

In one embodiment, the frame has four frame corners, one disposed between each two of the frame sides, the frame corners having carrier retention features that cooperate with the carrier to limit the range of motion of the carrier.

In one embodiment, a damping glue mounting part is arranged in the carrier limiting structure.

In one embodiment, the carrier limiting structure comprises two protruding parts integrally extending from the inner wall of the frame, and a limiting groove formed between the two protruding parts, and the damping glue mounting part is arranged at the bottom of the limiting groove.

In one embodiment, the carrier is provided with a limiting protrusion matched with the limiting groove, the limiting protrusion is provided with a damping glue mounting groove, and the damping glue mounting groove is matched with the damping glue mounting part to mount damping glue.

In one embodiment, the lens driving mechanism further includes a bottom coil and a bottom sensor, the bottom coil is mounted in the bottom circuit board and cooperates with the magnet group to drive the frame to drive the carrier to move on a plane perpendicular to the optical axis when the bottom coil is powered on, and the bottom sensor is disposed on the bottom circuit board and cooperates with the magnet group to detect displacement of the frame and the carrier on the plane perpendicular to the optical axis.

In one embodiment, the lens driving mechanism further includes a base on which the bottom circuit board is mounted, and a housing in which the frame and the carrier are mounted within a space defined by the housing and the base.

In one embodiment, the lens driving mechanism further includes suspension wires disposed at four corners of the lens driving mechanism and electrically connecting the bottom circuit board and the upper spring, wherein current flows from the bottom circuit board to the upper spring through the suspension wires and then from the upper spring to the side circuit board.

In one embodiment, the side circuit board is provided with a side sensor, a sensor magnet is provided at a position on the carrier corresponding to the side sensor, and the side sensor cooperates with the sensor magnet to detect displacement of the carrier in the optical axis direction.

Compared with the prior art, the utility model discloses a frame is equipped with the slot, through with the circuit board insert in the slot, compares with the scheme that realizes circuit connection through the embedded sheetmetal of frame and flexible circuit board, has simple structure, and the sensor detects stably, simple to operate swift technological effect.

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 bottom view of the lens driving mechanism according to an embodiment of the present invention, in which the housing is removed.

Fig. 3 is a top view of a lens driving mechanism according to an embodiment of the present invention, in which a housing is removed.

Fig. 4 is a sectional view of a lens driving mechanism according to an embodiment of the present invention.

Fig. 5 is another cross-sectional view of the lens driving mechanism according to an embodiment of the present invention.

Fig. 6 is a perspective view of a frame according to an embodiment of the present invention.

Fig. 7 is a perspective view of a carrier according to an embodiment of the present invention.

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.

The utility model relates to a camera lens actuating mechanism generally, it is main including the carrier, a frame, go up the reed, lower reed, the magnetite, bottom circuit board and lateral part circuit board, the carrier is used for installing camera lens and winding coil, the frame has central opening and is equipped with the slot that extends along the optical axis direction, lateral part circuit board is installed in the slot and encircles central opening setting with the magnetite, the carrier sets up in central opening, lower reed is with the lower surface swing joint of frame and carrier, go up the upper surface swing joint of reed with frame and carrier, the bottom circuit board sets up in the bottom of frame and carrier, the electric current leads to the coil department that the reed guided to the carrier again through lower reed through lateral part circuit board during operation, thereby realize the vertical direction motion of carrier.

Fig. 1 is an exploded perspective view of a lens driving mechanism 100 according to an embodiment of the present invention. As shown in fig. 1, the lens driving mechanism 100 includes a housing 10, an upper spring 11, a carrier 20, a side sensor magnet 21, a frame 30, a side circuit board 40, a magnet group 50, a lower spring 60, a bottom circuit board 70, and a base 80. The carrier coil 22 is wound around the carrier 20, the magnets 50 are mounted on three sides of the frame 30, the other side of the frame 50 is provided with a slot, and the side circuit board is disposed in the slot. The lateral circuit board of this application can be rigid circuit board, and it is fixed in inserting the slot of frame, makes things convenient for lateral circuit board equipment and fixed, improves the installation effectiveness and has higher stability.

Fig. 2 is a bottom view of the lens driving mechanism 100 according to an embodiment of the present invention, fig. 3 is a top view of the lens driving mechanism 100 according to an embodiment of the present invention, fig. 4 is a cross-sectional view of the lens driving mechanism 100 according to an embodiment of the present invention, and fig. 5 is another cross-sectional view of the lens driving mechanism 100 according to an embodiment of the present invention. As shown in fig. 2 to 5, the frame 30 has four frame sides, the magnet group 50 includes three magnets and is mounted on three sides of the frame 30, the side of the frame 30 where no magnet is mounted is provided with a slot 31, and the side circuit board 40 is a rigid circuit board and is inserted into the slot 31. The slot 31 is provided with a groove 33 recessed toward the carrier, and the side sensor 32 is electrically connected to the side circuit board 40 and disposed in the groove 33.

The carrier 20 is used for mounting optical elements and is arranged in the frame 30, carrier coils 21 are arranged on two opposite carrier side parts of the carrier 20, and the carrier coils 21 are matched with a pair of magnets correspondingly mounted on the frame 30, so that the carrier 20 is driven to move along the optical axis direction when power is supplied, and the optical zooming function is realized. The side portion of the carrier 20 corresponding to the side circuit board 40 mounted on the frame 30 is provided with a sensor magnet 22, and the sensor magnet 22 cooperates with the side sensor 32 to detect displacement of the carrier in the optical axis direction.

The bottom circuit board 70 is fixedly installed on the base 80 and is provided with a plurality of bottom coils 81, the plurality of bottom coils 81 are arranged in the bottom circuit board 70 and correspondingly matched with the magnet group 50, and when the bottom coils 81 are electrified, the carrier 20 is driven by the electromagnetic induction driving frame 30 to move on a plane perpendicular to the optical axis, so that the optical anti-shake function is realized. That is, one pair of opposing magnets in the magnet assembly 50 cooperates with the carrier coil 21 on the carrier to drive the carrier to move along the optical axis to realize the optical zoom function, and cooperates with the bottom coil 81 on the base 80 to drive the frame to drive the carrier to move on a plane perpendicular to the optical axis, for example, along the X-axis and the Y-axis perpendicular to the Z-axis, to realize the optical anti-shake function.

Referring to fig. 2 to 3, the upper spring 11 includes an upper spring first portion 111 fixedly connected to the upper surface of the frame 30 and an upper spring second portion 112 fixedly connected to the upper surface of the carrier 20, the upper spring first portion 111 and the upper spring second portion 112 are connected by an upper spring connecting portion 113 bent, and the upper spring first portion 111 and the upper spring second portion 112 can move relative to each other because the upper spring connecting portion 113 is formed with a bent portion. Similarly, the lower spring 12 also comprises a lower spring first part 121 movably connected with the lower surface of the frame 30 and a lower spring second part 122 movably connected with the lower surface of the carrier 20, the lower spring first part 121 and the lower spring second part 122 are connected through a bent lower spring connecting part 123, and the lower spring first part 121 and the lower spring second part 122 can move relatively because the lower spring connecting part 123 is formed with a bent part.

The carrier 20 and the frame 30 are connected at the upper surface by the upper spring 11 and at the lower surface by the lower spring 12, respectively, so that the carrier 20 can move within a certain range with respect to the frame 30. Specifically, when the carrier coil 22 on the carrier 20 is energized, it cooperates with the magnet group 50 inside the frame 30, so that the carrier moves in the optical axis direction with respect to the frame, implementing a zoom function. When the bottom coil 81 in the base 80 is energized, it cooperates with the magnet assembly 50 in the frame 30 to drive the frame 30 to move the carrier 20 in a plane perpendicular to the optical axis with substantially no or little relative movement between the frame 30 and the carrier 20.

The lower reed 12 is further provided with a coil connecting portion 124 and a lower reed circuit board connecting portion 125, the coil connecting portion 124 being electrically connected to the carrier coil 22, and the lower reed circuit board connecting portion 125 being electrically connected to the side circuit board. The upper reed 11 is provided with a suspension wire connection portion 114 and an upper reed circuit board connection portion 115, the upper reed circuit board connection portion 115 is electrically connected to the side circuit board, the suspension wire connection portion 114 is connected to the suspension wire 71, specifically, suspension wires 71 are respectively provided at four corners of the lens driving mechanism 100, one end of the suspension wire 71 is electrically connected to the suspension wire connection portion 114, and the other end of the suspension wire 71 is electrically connected to the bottom circuit board 70, thereby electrically connecting the bottom circuit board 70 to the upper reed 11 through the suspension wires 71. The current reaches the suspension wire 71 through the bottom circuit board 70, reaches the upper reed 11 through the suspension wire 71, reaches the side circuit board 40 through the upper reed 11, flows to the lower reed 12 through the side circuit board 40, flows to the carrier coil 22 through the lower reed 12, and the carrier coil 22 and the magnet group 50 cooperate to drive the carrier 20 to move along the optical axis direction.

Fig. 6 is a perspective view of a frame 30 according to an embodiment of the present invention, and fig. 7 is a perspective view of a carrier 20 according to an embodiment of the present invention. As shown in fig. 6-7, the frame 30 includes four frame sides and four frame corners, one frame corner is formed between each two frame sides, the inner walls of the frame corners are provided with carrier limiting structures 34, and the carrier limiting structures 34 are engaged with the carrier 20 and limit the carrier 20 to a certain extent. In this embodiment, the stopper structure 34 includes two protrusions 341 integrally and inwardly protruding from the inner wall of the frame, and a stopper groove is formed between the two protrusions 341, and a damping rubber mounting portion 342 is provided at the bottom of the stopper groove. Correspondingly, the carrier 20 is provided with a limiting protrusion 23 matched with the limiting groove, the limiting protrusion 23 is provided with a damping glue mounting groove 24, the damping glue mounting groove 24 is matched with the damping glue mounting part 342 of the frame 30 to mount damping glue, and the stability of the carrier 20 and the frame 30 during relative movement is increased.

During assembly, the sensor magnets 21 are inserted into the carrier 20, the lower spring pieces 60 are fixedly connected to the carrier, the side circuit boards are inserted into the slots 31 of the frame 30 and fixed, and the magnets are mounted on the respective sides of the frame 30 and fixed. Then the carrier assembly is put into the frame, the upper spring plate 11 is fixedly connected to the upper surfaces of the frame 30 and the carrier 20, the bottom circuit board is installed on the base 80, then the base assembly is assembled with the frame and the carrier fixed with the upper spring plate and the lower spring plate and the suspension wire 71 is placed, and then all parts composed of the frame and the carrier are encapsulated in the space defined by the shell 10 and the base 80.

The utility model discloses a camera lens actuating mechanism 100's electric current sets to and flows to the upper reed through the suspension wire through the bottom circuit board, flows to the lateral part circuit board by the upper reed again, and the IC electric current on the lateral part circuit board is realized through following circuit, and drive IC's on the lateral part circuit board electric current flows to the lower reed, again by the coil on the lower reed flow direction carrier.

The utility model discloses a frame is equipped with the slot to in utilizing rigid circuit board to insert the slot, compare with the scheme that realizes circuit connection through the embedded sheetmetal of frame and flexible circuit board, have simple structure, the sensor detects stably, simple to operate swift technological effect.

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

1. A lens driving mechanism is characterized by comprising a carrier, a frame, an upper reed, a lower reed, a magnet group, a bottom circuit board and a lateral circuit board, wherein the carrier is used for mounting a lens and is wound with a coil, the frame is provided with a central opening and is provided with a slot extending along the direction of an optical axis, the lateral circuit board is arranged in the slot and surrounds the central opening with the magnet group, the carrier is arranged in the central opening, the lower reed movably connects the frame with the lower surface of the carrier, the upper reed movably connects the frame with the upper surface of the carrier, the bottom circuit board is arranged at the bottoms of the frame and the carrier, current is guided to the lower reed through the lateral circuit board and then is guided to the coil of the carrier through the lower reed, to drive the carrier in the direction of the optical axis.

2. A lens driving mechanism according to claim 1, wherein the frame has four frame sides, one of which is provided with the slot and the other three of which are provided with the magnet group.

3. A lens driving mechanism according to claim 1, wherein the frame has four frame corners, one frame corner being provided between each two frame sides, the frame corners being provided with carrier stop structures which cooperate with the carrier to limit the range of motion of the carrier.

4. The lens driving mechanism according to claim 3, wherein a damping paste mounting portion is provided in the carrier stopper structure.

5. The lens driving mechanism according to claim 4, wherein the carrier stopper structure includes two projections integrally projecting from an inner wall of the frame, and a stopper groove formed between the two projections, the damping rubber mounting portion being provided at a bottom of the stopper groove.

6. The lens driving mechanism according to claim 5, wherein the carrier is provided with a limiting protrusion engaged with the limiting groove, the limiting protrusion being provided with a damping rubber mounting groove engaged with the damping rubber mounting portion to mount damping rubber.

7. The lens driving mechanism according to claim 1, further comprising a bottom coil mounted in the bottom circuit board and cooperating with the magnet group to drive the frame to move the carrier in a plane perpendicular to the optical axis when energized, and a bottom sensor disposed on the bottom circuit board and cooperating with the magnet group to detect displacement of the frame and the carrier in the plane perpendicular to the optical axis.

8. The lens driving mechanism according to claim 7, further comprising a base and a housing, wherein the bottom circuit board is mounted on the base, and wherein the frame and the carrier are mounted in a space defined by the housing and the base.

9. The lens driving mechanism according to claim 1, further comprising suspension wires which are provided at four corners of the lens driving mechanism and electrically connect the bottom circuit board and the upper spring, wherein electric current flows from the bottom circuit board to the upper spring through the suspension wires and then from the upper spring to the side circuit board.

10. The lens driving mechanism according to claim 1, wherein a side sensor is provided on the side circuit board, a sensor magnet is provided on the carrier at a position corresponding to the side sensor, and the side sensor cooperates with the sensor magnet to detect displacement of the carrier in the optical axis direction.