CN112612103A

CN112612103A - Optical element driving mechanism

Info

Publication number: CN112612103A
Application number: CN202011639746.9A
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 Haoze Electronics Co ltd Kunshan Branch
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-04-06

Abstract

The invention discloses an optical element driving mechanism, which comprises a carrier, a base, a frame, a bracket and a circuit board. The bracket is installed on the frame, the carrier is movably installed in the frame and the bracket and is provided with a first group of coils, the circuit board is fixedly installed on the base and is provided with a second group of coils, and the frame is provided with a first group of coils. The first set of magnets and the second set of magnets that cooperate with the second set of coils. The first group of coils cooperate with the first group of magnets to drive the carrier to move along the optical axis when energized, and the second group of coils cooperate with the second group of magnets to drive the base to move on a plane perpendicular to the optical axis when energized. The present invention can achieve more excellent zoom and anti-shake effects, thereby obtaining better imaging quality.

Description

Optical element driving mechanism

Technical Field

The invention relates to the field of optics, in particular to an optical element driving mechanism.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have a function of taking pictures or recording videos. The use of these electronic devices is becoming more common and the design direction of these electronic devices is being developed to be more convenient and thinner to provide more choices for users. However, sometimes the photos shot in the current mobile phone shooting process are blurred, that is, the shot pictures are not clear enough, and even ghost images or blur occur. These causes, in addition to occasional defocus (i.e., the camera fails to focus properly), are largely due to slight jitter that occurs when the photographic scene is exposed.

Generally, such a slight shake often occurs in a handheld condition, and thus a lens deviation of the image pickup apparatus is caused, so that the quality of an image captured by the image sensor is deteriorated. Therefore, in recent years, the demand for developing the anti-shake function is relatively large.

However, most of the prior art implements the optical zoom and the optical anti-shake functions through the movement of the same component (carrier), and the movement range of the carrier is limited by weight, volume and the like, so that the trouble of taking blurred pictures due to hand shake in the shooting process cannot be effectively solved.

Disclosure of Invention

The invention aims to provide an optical element driving mechanism, which is used for realizing optical zooming and optical anti-shake through different component movements, so as to solve the problem of blurred photos caused by hand shake in the shooting process.

In order to solve the above problem, according to an aspect of the present invention, there is provided an optical element driving mechanism, including a carrier, a base, a frame, a support, and a circuit board, wherein the support is mounted on the frame, the carrier is movably mounted in the frame and the support and is provided with a first set of coils, the circuit board is fixedly mounted on the base and is provided with a second set of coils, the frame is provided with a first set of magnets cooperating with the first set of coils and a second set of magnets cooperating with the second set of coils, wherein the first set of coils cooperates with the first set of magnets when being powered on to drive the carrier to move along an optical axis direction, and the second set of coils cooperates with the second set of magnets when being powered on to drive the base to move on a plane perpendicular to the optical axis.

In one embodiment, the first and second sets of magnets are a same set of magnets and are mounted to a side of the frame, an inner surface of the set of magnets being disposed opposite the first set of coils and a lower surface of the set of magnets being disposed opposite the second set of coils.

In one embodiment, the base is connected to the cradle by a hanger.

In one embodiment, the suspension element is made of a conductive material and is electrically connected to the first set of coils.

In one embodiment, four corners of the base are provided with suspension mounting portions, four corners of the bracket are provided with suspension portions, one end of the suspension is connected to the suspension portion of the bracket, and the other end of the suspension is connected to the suspension mounting portion of the base.

In one embodiment, an inner wall of the bracket corner is provided with a hanger escape groove having a lower end opened, and an upper end forming the hanging portion.

In one embodiment, the bracket includes four bracket sides and four bracket corners, the four bracket corners are provided with protrusions, and the frame has four frame sides and four frame corners, the four frame corners form indentations to mate with the protrusions, and lower surfaces of the four frame sides mate with the four bracket sides from the lower surfaces.

In one embodiment, the carrier is provided with an optical element mounting hole in the middle, a carrier side portion around the optical element mounting hole, and the first set of coils is provided around the periphery of the carrier side portion.

In one embodiment, the optical element driving mechanism further comprises a chip, the carrier is provided with an optical element mounting hole for mounting an optical element, the carrier side portion is formed around the optical element mounting hole, the first set of coils are arranged on the carrier side portion and are oppositely arranged, and the chip is arranged on the base and is matched with the optical element to receive light rays transmitted through the optical element.

In one embodiment, the optical element driving mechanism further comprises an upper spring and a lower spring, wherein the upper spring movably connects the upper surface of the frame with the upper surface of the carrier, and the lower spring movably connects the lower surface of the frame with the lower surface of the carrier.

The optical element driving mechanism of the invention can realize a wider range of movement and more excellent zooming and anti-shake effects because the zooming movement part is different from the optical anti-shake movement part, thereby obtaining better imaging quality.

Drawings

Fig. 1 is an exploded perspective view of an optical element driving mechanism according to an embodiment of the present application.

Fig. 2 is a perspective view of the frame of fig. 1.

Fig. 3 is a perspective view of the stent of fig. 1. .

Fig. 4 is a perspective view of the carrier of fig. 1.

Fig. 5 is a bottom view of the optical element driving mechanism of fig. 1 with the base and the circuit board removed.

Fig. 6 is a perspective view of the base of fig. 1.

Fig. 7 is a top view of the optical element drive mechanism of fig. 1 with the housing removed.

Fig. 8 is a cross-sectional view of the optical element driving mechanism of fig. 7 taken along line a-a.

Fig. 9 is a cross-sectional view of the optical element driving mechanism of fig. 7 taken along line B-B.

Detailed Description

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

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

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

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

The present application relates generally to an optical element driving mechanism, which can be used in a terminal product such as a mobile phone or a tablet computer to implement functions of taking pictures and recording videos. The optical element driving mechanism can comprise a carrier, a base, a frame, a support and a circuit board, wherein the frame is installed on the support, the carrier is used for bearing an optical element such as a lens and can be movably installed in the frame and the support, the circuit board is fixedly installed on the base, the carrier is provided with a first group of coils, the base is provided with a second group of coils, the frame is provided with a first group of magnets matched with the first group of coils and a second group of magnets matched with the second group of coils, the first group of magnets and the second group of magnets can be the same or different, the first group of coils are matched with the first group of magnets to drive the carrier to move along the direction of an optical axis to realize a zooming function when being electrified, and the second group of coils are matched with the second group of magnets to drive the base to move. It should be noted that although the first and second sets of magnets are used herein to distinguish the magnets cooperating with the first and second sets of coils, the first and second sets of magnets may be the same set of magnets, such as the set of magnets 50 described in the specific embodiments below, which cooperate with the first set of coils to achieve zooming on one hand and the second set of coils to achieve optical anti-shake on the other hand. Furthermore, the first group of magnets may include only one magnet and the second group of magnets may include only one magnet, where the first group and the second group do not limit the number of magnets in a pair.

The application's optical element drive arrangement's motion mode is different from conventional optical element drive arrangement, and conventional optical element drive arrangement realizes optics through the motion of drive carrier along the optical axis direction and zooms, realizes optics anti-shake through the motion of drive carrier on the plane of perpendicular to optical axis, and this application then realizes optics through the motion of drive carrier along the optical axis direction and zooms, drives the flying piece on the base through the drive base and moves on the plane of perpendicular to optical axis and realize optics anti-shake. Because the moving part that zooms is different with the moving part of optics anti-shake, no matter carrier or base can all realize wider motion, realize more excellent zooming and anti-shake effect to obtain better image quality.

In addition, in an embodiment of the present application, the frame is connected to the base through the bracket, in other words, the frame is supported on the base through the bracket, so that the base can realize a wider range of movement relative to the frame and the carrier in the frame, and a better anti-shake function is realized.

In this context, for convenience of description, the term "optical axis" is introduced to mean the direction of propagation of light rays within an optical element, which is an abstraction and does not mean that there exists an axis in a physical sense.

The optical element driving mechanism of one embodiment of the present application is described in detail below with reference to fig. 1 to 9.

Fig. 1 is an exploded perspective view of an optical element driving mechanism according to an embodiment of the present application, and referring to fig. 1, the optical element driving mechanism 100 includes a housing 10, an upper spring 21, a carrier 30, a frame 40, a magnet assembly 50, a lower spring 22, a bracket 60, a circuit board 70, a base 80, and a suspension member 90. The position of the housing 10 is defined as up, the position of the base 80 is defined as down, the light is transmitted from the housing to the base, and the direction of the light is defined as the optical axis direction.

The carrier 30 is used for mounting an optical element such as a lens and is movably mounted in the frame 40, the upper spring 21 movably connects the upper surface of the carrier 30 with the upper surface of the frame 40, and the lower spring 22 movably connects the lower surface of the carrier 30 with the lower surface of the frame 40, where the upper surface refers to a surface facing the housing 10 and the lower surface refers to a surface facing the base 80. The magnet group 50 is fixedly installed in the frame 40, and the carrier 30 is provided with a first group of coils and cooperates with at least some magnets (referred to as a first group of magnets) in the magnet group 50, so that when the coils in the carrier 30 are energized, the carrier 30 is driven to move along the optical axis direction by the action of the magnetic field force, thereby realizing the zoom function.

The frame 40 is mounted on a support 60, the circuit board 70 is fixedly mounted on a base 80, the base 80 is movably connected to the support 70 by means of suspension members 90, and a chip (not shown) is disposed on the base 80 and at the bottom of the carrier 30 to be aligned with the optical elements when the optical elements are mounted in the carrier 30 to receive light rays transmitted through the optical elements. A second set of coils (not shown) is disposed in the circuit board 70, and the second set of coils cooperates with at least some of the magnets (called the second set of magnets) of the magnet set 50 to drive the base and thus the chip to move on a plane perpendicular to the optical axis when the circuit board is powered on, thereby implementing the optical anti-shake function.

As can be seen from the above description, the optical element driving mechanism 100 according to an embodiment of the present application realizes the zooming function by driving the carrier 30 to move along the optical axis direction, and realizes the optical anti-shake function by driving the base 80 to move and then driving the chip to move, that is, the moving components for realizing the zooming function and the anti-shake function are not the same components, but are independent components, so that the base and the carrier can move in a wider range, and more excellent zooming and anti-shake effects can be realized.

Fig. 2 is a perspective view of the frame 40 of fig. 1. Referring to fig. 2, the frame 40 is formed as a substantially rectangular frame as a whole, with a frame opening 42 formed in the middle thereof for mounting the carrier 30, four frame sides 43 and four frame corners 44 formed around the frame opening 42, the four frame sides 43 being arranged opposite to each other two by two, and one frame corner 44 being provided between each two adjacent frame sides 43. The inner wall of each frame side 43, i.e., the side wall facing the frame opening 42, is provided with a side magnet mounting groove 431, the magnet group 50 is mounted in the side magnet mounting groove 431, and each frame corner 44 is notched to fit with the protrusion of the bracket 60.

Fig. 3 is a perspective view of the bracket 60 of fig. 1. As shown in fig. 3, a bracket opening 61 is formed in the middle of the bracket 60 to mount the carrier 30, four bracket sides 62 and four bracket corners are formed around the bracket opening 61, the four bracket sides 62 are arranged opposite to each other two by two, one bracket corner is provided between every two adjacent bracket sides 62, each bracket corner is provided with a protrusion 63 protruding in the housing direction, a hanger-avoiding groove 64 is provided on an inner wall of the bracket corner, a lower end of the hanger-avoiding groove 64 is open, an upper end thereof is formed with a hanging portion 641, and the hanger 90 is arranged in the hanger-avoiding groove 64 and hung from the hanging portion 641 through one end (refer to fig. 9). The housing-facing surface of the bracket side 62 is fitted with the frame side 43 of the frame 40, that is, when the frame 40 is mounted on the bracket 60, the lower surface of the frame side 43 is in contact with the upper surface of the bracket side 62 (refer to fig. 8). The periphery wall of support 60 is equipped with step portion 65, and shell 10 suit is on support 60 and with step portion 65 cooperation, carries on spacingly to the shell through step portion 65. The protrusion 63 is provided with a certain gap or contact with the top wall of the housing 10, which is not limited herein.

Fig. 4 is a perspective view of the carrier 30 of fig. 1. As shown in fig. 4, the carrier 30 is provided with an optical element mounting hole 31 inside, a carrier side portion 32 is formed around the optical element mounting hole 31, a first group of coils 33 is provided around the outer periphery of the carrier side portion 32, and the first group of coils 33 is engaged with at least a part of magnets (referred to as a first group of magnets) of the magnet group 50 mounted on the frame 40 and drives the carrier 30 to move in the optical axis direction by electromagnetic induction when energized, so as to realize a zoom function.

Fig. 5 is a bottom view of the optical element driving mechanism 100 of fig. 1 with the base and the circuit board removed. As shown in fig. 5, the magnet group 50 includes four magnets and is disposed in four side magnet mounting grooves 431 of the frame 40, respectively, and an inner surface of the magnet group 50 is disposed opposite to the first group of coils 33 on the carrier 30 to drive the carrier to move in the optical axis direction when power is applied to achieve zooming. It should be noted that although in the present embodiment, each of the four frame sides 43 of the frame 40 is provided with a magnet, it will be understood by those skilled in the art that the magnets may be mounted on only a part of the four frame sides 43, for example, only one magnet is mounted on each of one pair of opposite frame sides, and correspondingly, the coil on the carrier 30 may be provided on only one pair of opposite carrier sides and corresponding to the frame side on which the magnets are mounted. It will be understood by those skilled in the art that the frame 40 may have other magnet arrangements for moving the carrier 30 in the optical axis direction for optical zooming, which are not listed here.

Referring back to fig. 1, both the upper spring 21 and the lower spring 22 comprise a first part fixed to the carrier and a second part fixed to the frame, which are connected by a connection, which may be formed, for example, by a bent connection, so that the first part and the second part can move relative to each other. It should be noted that the upper spring 21 and the lower spring 22 shown in fig. 1 are only an example, and other ways of movably connecting the upper surface of the carrier and the upper surface of the frame and movably connecting the lower surface of the frame and the lower surface of the carrier can be applied to the optical element driving mechanism 100 of the present embodiment.

Fig. 6 is a perspective view of the base 80 of fig. 1, in which a base opening 81 for mounting a chip is formed in the middle thereof, referring back to fig. 1, a circuit board opening 71 for avoiding the chip is formed in the middle of the circuit board 70, and a second group of coils (not shown) for engaging with at least some of the magnets (referred to as a second group of magnets) of the magnet group 50 mounted on the frame 40 is mounted around the circuit board opening 71, so that the base is driven by electromagnetic induction when the second group of coils is energized, and thus the chip on the base is driven to move on a plane perpendicular to the optical axis, thereby achieving an optical anti-shake function.

It should be noted that in the optical element driving mechanism 100 of the present embodiment, the magnet group 50 has both functions of a first group of magnets cooperating with the first group of coils and a second group of magnets cooperating with the second group of coils, specifically, the inner surface of the magnet group 50 cooperates with the first group of coils 33 to drive the carrier 30 to move along the optical axis direction, and the surface of the magnet group 50 facing the base cooperates with the second group of coils to drive the base to move on a plane perpendicular to the optical axis. However, it will be understood by those skilled in the art that in other embodiments, it may be arranged that a part of the magnets in the magnet group 50 cooperate with the first set of coils to drive the carrier to move along the optical axis for zooming, and another part of the magnets cooperate with the second set of coils to achieve optical anti-shake. For example, one pair of opposed magnets cooperates with the first set of coils to drive the carrier to move in the direction of the optical axis to achieve zooming, and the other pair of opposed magnets cooperates with the second set of coils to drive the base to move in a plane perpendicular to the optical axis, for example, in two axes perpendicular to each other in the plane perpendicular to the optical axis, so as to achieve optical anti-shake.

With continued reference to fig. 6, circuit board 70 is fixedly mounted to a base 80, to which a chip (not shown) is fixedly mounted. The chassis 80 is formed as a rectangular unit as a whole, and is provided with a hanger attaching portion 82 at four corners, one end of a hanger 90 is provided to the hanger attaching portion 82, and the other end of the hanger 90 is connected to a hanging portion 641 of the cradle 60 (see fig. 8).

Fig. 7 is a top view of the optical element driving mechanism of fig. 1 with the housing removed, fig. 8 is a cross-sectional view of the optical element driving mechanism of fig. 7 taken along line a-a, and fig. 9 is a cross-sectional view of the optical element driving mechanism of fig. 7 taken along line B-B. As shown in fig. 7-9, the circuit board 70 is fixedly mounted on the base 80, a second set of coils (not shown) is disposed inside the circuit board 70, the magnet assembly 50 is mounted in the frame 40, a lower end surface of the magnet assembly 50 is matched with the second set of coils in the circuit board 70 to drive the base to drive the chip to move on a plane perpendicular to the optical axis, so as to achieve optical anti-shake, and an inner surface of the magnet assembly 50 is matched with the first set of coils 33 mounted on the carrier 30 to drive the carrier 30 to move along the optical axis, so as to achieve optical zooming. A first set of coils 33 is mounted around the carrier 30. The base 80 is suspended from the stand 60 by a suspension 90 such that the base 80 can move relative to the stand 60. The frame 40 is mounted on the bracket 60. The suspension 90 has a conductive function that can introduce a current into the first set of coils 33 mounted on the carrier 30.

In operation, the frame 40, the magnet assembly 50 and the holder 60 form a stationary part, for example, for direct mounting on a terminal such as a mobile phone, a tablet computer, etc., and the carrier 30, the base 80 and the circuit board 70 and the chip mounted on the base 80 form a movable part. When the first group of coils 33 on the carrier 30 is energized, electromagnetic induction is formed with the magnet group 50 and drives the carrier 30 to move along the optical axis direction, so as to realize the zoom function, and when the second group of coils in the circuit board 70 is energized, electromagnetic induction is formed with the magnet group 50 and drives the base 80 to drive the chip and the circuit board to move on a plane perpendicular to the optical axis, so as to realize optical anti-shake. Therefore, the lens driving mechanism realizes zooming through carrier movement, realizes optical anti-shake through movement of the base driving chip, and connects the base and the support through the suspension part, so that the base and the support can move relatively in a certain range, and has a circuit conduction function, a conductive element does not need to be additionally added, and the production cost is saved. In addition, this application supports frame and base through the support, has improved lens actuating mechanism's bulk strength.

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

Claims

1. An optical element driving mechanism, characterized in that the optical element driving mechanism comprises a carrier, a base, a frame, a bracket and a circuit board, the bracket is mounted on the frame, and the carrier is movably mounted on the A first group of coils are arranged in the frame and the bracket, the circuit board is fixedly mounted on the base and has a second group of coils, and the frame is provided with a first group of coils that cooperate with the first group of coils. A set of magnets and a second set of magnets matched with the second set of coils, wherein the first set of coils cooperate with the first set of magnets to drive the carrier to move in the direction of the optical axis when the first set of coils is energized, and the second set of magnets When the coil is energized, it cooperates with the second group of magnets to drive the base to move on a plane perpendicular to the optical axis.

2 . The optical element driving mechanism according to claim 1 , wherein the first group of magnets and the second group of magnets are the same group of magnets and are mounted on the side of the frame, and the magnets The inner surface of the magnet group is arranged opposite to the first group of coils, and the lower surface of the magnet group is arranged opposite to the second group of coils.

3 . The optical element driving mechanism according to claim 1 , wherein the base and the bracket are connected by a suspension member. 4 .

4 . The optical element driving mechanism according to claim 3 , wherein the suspension member is made of conductive material and is electrically connected to the first group of coils. 5 .

5 . The optical element driving mechanism according to claim 3 , wherein the four corners of the base are provided with hanging parts mounting parts, the four corners of the bracket are provided with hanging parts, and the hanging parts are provided with the hanging parts. 6 . One end of the suspension is connected to the suspension part of the bracket, and the other end of the suspension is connected to the suspension installation part of the base.

6 . The optical element driving mechanism according to claim 5 , wherein the inner wall of the corner portion of the bracket is provided with a suspension member avoidance groove, the lower end of the suspension member avoidance groove is open, and the upper end of the suspension member avoidance groove is open. 7 . The suspension portion is formed.

7 . The optical element driving mechanism according to claim 1 , wherein the bracket comprises four bracket side portions and four bracket corner portions, the four bracket corner portions are provided with protruding portions, and the The frame has four frame sides and four frame corners, the four frame corners are notched to fit with the protrusions, and the lower surfaces of the four frame sides are in contact with the four bracket sides Fit from the bottom surface.

8 . The optical element driving mechanism according to claim 1 , wherein an optical element mounting hole is provided in the middle of the carrier, a side portion of the carrier is formed around the optical element mounting hole, and the outer periphery of the side portion of the carrier is formed. 9 . The first set of coils is provided.

9 . The optical element driving mechanism according to claim 1 , wherein the optical element driving mechanism further comprises a chip, the carrier is provided with an optical element mounting hole for mounting the optical element, and is formed around the optical element mounting hole. 10 . The side of the carrier, the first group of coils are arranged on the side of the carrier and are oppositely arranged, the chip is arranged on the base and cooperates with the optical element to receive light transmitted through the optical element .

10 . The optical element driving mechanism according to claim 1 , wherein the optical element driving mechanism further comprises an upper leaf and a lower leaf, and the upper leaf connects the upper surface of the frame with the carrier. 11 . The upper surface of the frame is movably connected, and the lower spring connects the lower surface of the frame and the lower surface of the carrier movably.