CN110955095A

CN110955095A - Multi-axis optical anti-shake and focusing device, camera module, and electronic apparatus

Info

Publication number: CN110955095A
Application number: CN201911274958.9A
Authority: CN
Inventors: 刘述伦; 计树标; 陈林
Original assignee: Dongguan Yadeng Electronics Co Ltd
Current assignee: Guangdong haideya Technology Co.,Ltd.
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-04-03

Abstract

The invention discloses a multi-axis optical anti-shake and focusing device, a camera module and an electronic device. A multi-axis optical anti-shake and focus apparatus comprising: the SMA optical anti-shake actuator comprises a fixed plate, a movable plate and a first SMA wire connecting the fixed plate and the movable plate; the upper SMA actuator is connected to the movable plate and comprises a second SMA wire and a driven piece, and the second SMA wire is electrified and contracted to drive the driven piece to move along the Z axis; the upper SMA actuators are provided with at least 2; the mirror frame body, every driven piece all is connected on the mirror frame body. Different driven parts on the lens frame body are driven to move along the Z axis by arranging at least two upper SMA actuators, so that the lens frame body can rotate, the multi-axis optical anti-shake and focusing device can also compensate the influence caused by lens deflection through a rotating form, and the imaging quality is improved.

Description

Multi-axis optical anti-shake and focusing device, camera module, and electronic apparatus

Technical Field

The invention relates to the technical field of camera shooting anti-shake, in particular to a multi-axis optical anti-shake and focusing device, a camera module and electronic equipment.

Background

At present, cameras with automatic focusing or anti-shaking functions are widely applied to intelligent products such as mobile phones, automobiles, unmanned planes and security monitoring. The common micro automatic focusing camera usually adopts a voice coil motor to drive a lens to move up and down along the optical axis of the lens, thereby realizing automatic focusing; however, in the process of taking a picture or taking a picture, the lens usually cannot be kept in absolute balance due to the shaking of the user, and therefore, the lens may be deviated or deflected to some extent.

In order to improve the above problems, an optical anti-shake apparatus has been developed, which adds an optical anti-shake actuator capable of driving an auto-focus voice coil motor and a lens to move together on a plane perpendicular to an optical axis of the lens, on the basis of the auto-focus voice coil motor, so as to drive the lens to move in two directions perpendicular to the optical axis to compensate for the above offset; although the optical anti-shake device can help the camera to obtain better image quality to a great extent, the optical anti-shake device can only compensate the offset of three axial positions of an X axis, a Y axis and a Z axis (optical axis) which are perpendicular to each other, and the influence on the deflection of the lens is difficult to eliminate more effectively.

In addition, the optical anti-shake device adopts an automatic focusing voice coil motor, the automatic focusing voice coil motor drives the lens to move through the Lorentz force generated by the electrified coil in the magnetic field, the camera module is usually provided with a sensor and other electronic components, and the electromagnetic interference generated by the electrified coil in the voice coil motor and the magnetic field can influence the normal operation of other electronic components to a certain extent.

Disclosure of Invention

The present invention is directed to solve at least one of the problems of the prior art, and provides a multi-axis optical anti-shake and focusing apparatus, an image capturing module, and an electronic device, which can eliminate the influence of lens deflection and improve the imaging quality.

The technical scheme adopted for solving the technical problems is as follows:

a multi-axis optical anti-shake and focus apparatus comprising: the SMA optical anti-shake actuator comprises a fixed plate, a movable plate and a first SMA wire connecting the fixed plate and the movable plate, wherein the first SMA wire can drive the movable plate to move in an XY plane by electrifying and contracting; the upper SMA actuator is connected to the movable plate and comprises a second SMA wire and a driven piece, and the second SMA wire is electrified and contracted to drive the driven piece to move along the Z axis; the number of the upper SMA actuators is at least 2; the center of the frame body is provided with a lens mounting hole with an axis parallel to the Z axis, and each driven piece is connected to the frame body.

The multi-axis optical anti-shake and focusing device has at least the following beneficial effects:

the SMA optical anti-shake actuator and the upper SMA actuator generate driving force to drive the lens frame body to move through the contraction of the SMA wires, so that the normal work of other electronic elements cannot be influenced by the generation of electromagnetic interference; and through setting up two at least upper portions SMA actuator and drive the different driven pieces on the lens frame body and move along the Z axle, can make whole lens frame body carry out Z to the removal compensation when the driven piece is unanimous along the amount of movement of Z axle, and when the driven piece is inconsistent along the amount of movement of Z axle, can make the lens frame body produce and rotate, thus make this multiaxis optics anti-shake and focusing device can also compensate the influence that the lens deflection brought through the form of rotating, thereby improve image quality.

In one possible embodiment of the invention, the driven member is uniformly distributed around a central axis of the lens mounting hole. The positions and distances of each driven part and the center of the lens can be consistent by uniformly distributing the driven parts around the central axis of the lens mounting hole, so that the upper SMA actuators are convenient to control and adjust.

In a possible embodiment of the present invention, the upper SMA actuator further includes two actuating bodies, each of the actuating bodies includes a connecting rod, a supporting portion, and a first elastic arm, one end of the connecting rod is connected to the second SMA wire, one end of the connecting rod is elastically connected to the supporting portion, the first elastic arm is disposed between the connecting rod and the supporting portion, the first elastic arm is elastically bendable, one end of the connecting rod is hinged to the driven member, the second SMA wire can contract to drive the connecting rod to swing with respect to the supporting portion, and the connecting rod can drive the driven member to move along the Z axis. The connecting rod can elastically swing relative to the supporting part through the first elastic arm, so that the displacement of the driven part and the focusing ring can be larger than the contraction of the second SMA wire, and therefore, a larger adjusting stroke can be realized under the condition that the size of the upper SMA actuator is smaller, and the miniaturization of the whole multi-axis optical anti-shake and focusing device is facilitated.

In a possible implementation manner of the present invention, the glasses frame further includes a movable seat and a spring, the movable seat is connected to the movable plate, the upper SMA actuator is connected to the movable seat, the spring is fixedly connected to the glasses frame body, the spring is provided with a plurality of second elastic arms, one end of each second elastic arm is connected to the movable seat, and the second elastic arms enable the spring to support the glasses frame body and enable the glasses frame body to move relative to the movable seat. The mirror frame body can be in an elastic suspension state on the movable seat through the second elastic arm, so that the mirror frame body is easier to drive relative to each upper SMA actuator.

In a possible embodiment of the present invention, a position sensor for detecting the position and the inclination of the mirror frame body or a controller integrated with a position sensor is provided on the movable plate. The position sensor is used for feeding back the offset and the deflection inclination angle of the lens frame body and the lens in the Z direction, so that the displacement and the rotation angle of the lens frame body required to be adjusted and compensated by the upper SMA actuator can be conveniently obtained.

In one possible embodiment of the present invention, the frame body is provided with a magnet corresponding to the position of the position sensor or the controller, so that the position and inclination of the frame body and the lens are known by the position sensor detecting the change of the magnetic field.

In a possible embodiment of the present invention, the movable plate is movably erected on a fixed plate, the fixed plate is fixed on a substrate, a third elastic arm is arranged at an edge of the movable plate, a free end of the third elastic arm is fixed on the fixed plate, and the movable plate can move relative to the fixed plate under the constraint of the third elastic arm; and two ends of the first SMA wire are respectively connected with the fixed plate and the movable plate. The movable plate is erected above the fixed plate by arranging the third elastic arm, so that the movable plate can move in an XY plane above the fixed plate by electrifying and contracting the second SMA wire.

In a possible embodiment of the present invention, a set of opposite corners of the fixed plate is provided with a first touch panel, another set of opposite corners of the movable plate is provided with a second touch panel, four first SMA wires are provided and respectively correspond to four sides of the movable plate, and two ends of the first SMA wires are respectively connected to the first touch panel and the second touch panel. The fixed plate, the movable plate and the first SMA wires are connected conveniently by arranging the first touch plate and the second touch plate, and 4 second SMA wires are arranged, so that two second SMA wires parallel to the X axis can respectively drive the movable plate to move along the forward direction and the reverse direction of the X axis, and two second SMA wires parallel to the Y axis can respectively drive the movable plate to move along the forward direction and the reverse direction of the Y axis, and the multi-axis optical anti-shake and focusing device is favorably expanded in focusing and anti-shake functions.

A camera module characterized by: the multi-axis optical anti-shake and focusing device is provided.

An electronic device comprising the multi-axis optical anti-shake and focusing apparatus or the camera module.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a multi-axis optical anti-shake and focusing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an SMA optical anti-shake actuator according to an embodiment of the invention;

FIG. 3 is a schematic view of the connection structure of the upper SMA actuator, the frame body, the spring, and the base according to the embodiment of the invention;

FIG. 4 is a schematic structural view of the upper SMA actuator of an embodiment of the invention with the driven member removed;

FIG. 5 is a schematic structural diagram of a base according to an embodiment of the present invention;

fig. 6 is a schematic view of a connection structure of the mirror frame body and the spring according to the present invention.

Reference numerals:

the SMA optical anti-shake actuator 1, a fixed plate 110, a first contact plate 111, a movable plate 120, a third elastic arm 121, a position sensor 122, a second contact plate 123, and a first SMA wire 130.

Upper SMA actuator 2, first upper SMA actuator 20a, second upper SMA actuator 20b, second SMA wire 210, driven member 220, hinge post 221, actuation portion 230, support 231, link 232, first resilient arm 233.

The lens holder body 3, the lens mounting hole 310 and the embedding groove 320;

a movable seat 4 and a connecting column 410;

spring 5, second elastic arm 510;

a substrate 6 and a cover 7.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 6, the camera module according to the present invention includes a multi-axis optical anti-shake and focusing apparatus according to the present invention.

Multi-axis optical anti-shake and focusing apparatus comprising a frame body 3, an SMA optical anti-shake actuator 1 and at least two upper SMA actuators 2.

The SMA optical anti-shake actuator 1 includes a fixed plate 110, a movable plate 120, and a first SMA wire 130 connecting the fixed plate 110 and the movable plate 120, wherein the first SMA wire 130 is electrically contracted to drive the movable plate 120 to move in an XY plane.

The upper SMA actuator 2 is connected to the movable plate 120 and includes a second SMA wire 210 and a driven member 220, and the second SMA wire 210 is electrically contracted to drive the driven member 220 to move along the Z-axis.

The lens frame body 3 is provided with a lens mounting hole 310 with the axis parallel to the Z axis in the center, and a lens can be mounted in the lens mounting hole 310, so that the optical axis of the lens is parallel to the Z axis under normal conditions; each of the driven members 220 is connected to the housing body 3.

the SMA optical anti-shake actuator 1 and the upper SMA actuator 2 both generate driving force to drive the lens frame body 3 to move through the contraction of the SMA wires, so that the normal work of other electronic elements cannot be influenced by the generation of electromagnetic interference; and through setting up at least two upper portions SMA actuator 2 to drive different driven pieces 220 on the lens frame body 3 to move along the Z axle, can make the whole lens frame body 3 carry on the Z to move and compensate when the amount of movement of the driven piece 220 along the Z axle is unanimous, and when the amount of movement of the driven piece 220 along the Z axle is inconsistent, can make the lens frame body 3 produce and rotate, thus make this multi-axis optics anti-shake and focusing device can also compensate the influence that the lens deflects through the form of rotating, thus improve the imaging quality.

Referring to fig. 1 and 2, regarding the fixed plate 110, the fixed plate 110 is fixedly connected to the substrate 6, the movable plate 120 is disposed above the fixed plate 110, the movable plate 120 is movable relative to the fixed plate 110, and for simplifying the overall circuit, the movable plate 120 is preferably made of an electrically conductive metal material, and the movable plate 120 has certain elasticity.

Referring to fig. 3, regarding the driven member 220, the driven member 220 can be formed with the frame body 3 or fixedly connected to the frame body 3, and in this embodiment, the driven member 220 is preferably formed integrally with the frame body 3.

With respect to the first SMA wire 130 and the second SMA wire 210, the SMA wires are shape memory alloy wires that achieve length contraction before and after energization.

In an embodiment, the driven members 220 are uniformly distributed around the central axis of the lens mounting hole 310. The positions and distances of each driven member 220 and the lens center can be consistent by uniformly distributing the driven members around the central axis of the lens mounting hole 310, so that the control and adjustment of each upper SMA actuator 2 are facilitated.

Referring to fig. 4, the upper SMA actuator 2 further includes two actuating bodies 230, each of the actuating bodies 230 includes a connecting rod 232, a supporting portion 231, and a first elastic arm 233, one end of the connecting rod 232 is connected to the second SMA wire 210, one end of the connecting rod 232 is elastically connected to the supporting portion 231, the first elastic arm 233 is disposed between the connecting rod 232 and the supporting portion 231, the first elastic arm 233 is elastically bendable, one end of the connecting rod 232 is hinged to the driven member 220, the second SMA wire 210 can drive the connecting rod 232 to swing relative to the supporting portion 231 by contraction, and the connecting rod 232 can drive the driven member 220 to move along the Z axis. The link rod 232 can elastically swing relative to the support part 231 through the first elastic arm 233, so that the displacement of the driven part 220 and the focus ring can be larger than the contraction of the second SMA wire 210, and a larger adjusting stroke can be realized under the condition that the size of the upper SMA actuator 2 is smaller, which is beneficial to the miniaturization of the whole multi-axis optical anti-shake and focusing device.

Regarding the first elastic arm 233, the first elastic arm 233 is made of an elastic material, and can be bent when the second SMA wire 210 is contracted. The first elastic arm 233 is in the shape of a bar, and one end of the first elastic arm 233 is connected to the support portion 231 and the other end is connected to the link 232.

As for the link 232, the link 232 is a rod having a certain rigidity, and can support the driven member 220 and the lens frame body 3, etc. for displacement.

In the present embodiment, the supporting portion 231, the first elastic arm 233 and the link 232 are integrally formed by a conductive material. The support 231, the first elastic arm 233 and the connecting rod 232 are integrally formed, so that the manufacturing difficulty and cost of the upper SMA actuator 2 are reduced, the support 231, the first elastic arm 233 and the connecting rod 232 can be made of SMA wires by conductive materials, and the overall circuit structure of the multi-axis optical anti-shake and focusing device is simplified.

The support 231, the first elastic arm 233, and the link 232 are integrally formed of a metal material, and thus have both excellent elasticity and conductivity.

In the present embodiment, the two actuating bodies 230 in the same upper SMA actuator 2 are symmetrically arranged, and the symmetrical arrangement of the supporting portion 231, the first elastic arm 233 and the connecting rod 232 can enhance the stability of the movement of the driven member 220.

Regarding the driven member 220, a protruding hinge pillar 221 is disposed on the driven member 220, and a hinge ring is disposed at one end of the connecting rod 232 and sleeved on the hinge pillar 221 to form a hinge mechanism. In this embodiment, two hinge columns 221 are provided, and two connecting rods 232 in the same upper SMA actuator 2 are respectively hinged with the two hinge columns 221. Of course, in other embodiments, only one hinge pillar 221 may be provided on the driven member 220, and both the two connecting rods 232 in the same upper SMA actuator 2 are hinged through the hinge pillar 221, and the two connecting rods 232 are insulated from each other at the hinged position by the spacer.

In the present embodiment, specifically, the number of the upper SMA actuators 2 is 4, and two opposite upper SMA actuators 2 are taken as one group, so that the two groups are divided into two groups to respectively control the frame body 3 and the lens to realize rotation control around the X axis and the Y axis; for example, taking the rotation control around the X axis as an example, when the lens needs to be controlled to rotate around the X axis, the two upper SMA actuators 2 connected to the driven member 220 and parallel to the X axis do not operate, and the other two upper SMA actuators 2 drive the driven member 220 to generate different Z axis displacements, so that the lens frame 3 and the lens rotate around the X axis; when only the Z-direction displacement needs to be generated, the four upper SMA actuators 2 are simultaneously activated, and the displacement amount of each driven member 220 is made uniform.

Of course, in other embodiments, the number of the upper SMA actuators 2 may be 2, 3 or more than 4; for example, when only 2 upper SMA actuators 2 are used, it is difficult to simultaneously rotate around the X-axis and the Y-axis, and it is suitable to rotate around the X-axis or the Y-axis to compensate for the anti-shake; the adoption of 3 upper SMA actuators 2 requires the cooperation of three upper SMA actuators 2 to facilitate the resultant rotation around the X axis or the Y axis, so that the control is not easy; while providing more than 4 upper SMA actuators 2 tends to increase costs.

Also, in the present embodiment, the upper SMA actuator 2 is divided into a first upper SMA actuator 20a and a second upper SMA actuator 20b, the second SMA wire 210 of the first upper SMA actuator 20a being arranged between the connecting rod 232 and the movable plate 120, and the connecting rod 232 of the second upper SMA actuator 20b being arranged between the second SMA wire 210 and the movable plate 120. The multi-axis optical anti-shake and focusing device comprises at least one first upper SMA actuator 20a and at least one second upper SMA actuator 20b, and the lens frame body 3 can be driven to move in more directions due to the different relative positions between the connecting rod 232, the second SMA wire 210 and the movable plate 120 in the first upper SMA actuator 20a and the second upper SMA actuator 20b, so that the lens frame body 3 can be driven to move in opposite directions, and the focusing and anti-shake functions of the multi-axis optical anti-shake and focusing device can be expanded.

With respect to the upper SMA actuators 2, preferably each upper SMA actuator 2 surrounds the frame body 3.

In the present embodiment, it is preferable that the first upper SMA actuators 20a are two in number and symmetrically arranged with respect to the housing body 3, and the second upper SMA actuators 20b are two in number and symmetrically arranged with respect to the housing body 3. The two first upper SMA actuators 20a and the two second upper SMA actuators 20b are respectively arranged symmetrically with respect to the frame body 3, and by respectively controlling the upper SMA actuators 2, the detection or control of the inclination angle and displacement of the frame body 3 and the lens can be realized, which is beneficial to further expanding the anti-shake and focusing functions of the camera module.

With respect to the first and second

upper SMA actuators

20a, 20b, the differences are contrastable from fig. 1, 4 and 5. When the second SMA wire 210 contracts, the connecting rod 232 of the first upper SMA actuator 20a swings in a direction away from the movable plate 120, thereby driving the mirror frame body 3 away from the movable plate 120. When the second SMA wire 210 contracts, the connecting rod 232 of the second upper SMA actuator 20b swings in a direction to approach the movable plate 120, thereby driving the mirror frame body 3 to approach the movable frame.

Multiaxis optics anti-shake and focusing device is still including sliding seat 4 and spring 5, sliding seat 4 connects on the fly leaf 120, upper portion SMA actuator 2 connects on sliding seat 4, spring 5 with mirror frame body 3 fixed connection, spring 5 is equipped with a plurality of second elastic arms 510, the one end of second elastic arm 510 with sliding seat 4 connects, second elastic arm 510 makes spring 5 supports mirror frame body 3 makes mirror frame body 3 is relative sliding seat 4 is movable.

The two springs 5 are provided in total and are respectively attached to the upper and lower surfaces of the frame body 3, the springs 5 and the second elastic arms 510 are integrally formed as metal pieces, and the second elastic arms 510 allow the frame body 3 to be elastically suspended on the movable base 4, thereby facilitating driving of the frame body 3 on each upper SMA actuator 2. Here, the spring 5 does not mean a coil spring 5, a spiral spring 5 or a plate spring 5 which is common in the mechanical field, but is a special spring 5 which is used exclusively for suspending the housing body 3.

Regarding movable seat 4, four corners of movable seat 4 all are provided with four spliced poles 410 that extend to frame body 3 one side, and the side at spliced pole 410 is all connected to the supporting part 231 in upper portion SMA actuator 2, and the second elastic arm 510 of connecting the frame body 3 upper surface is connected to spliced pole 410 top.

In this embodiment, the movable plate 120 is provided with a position sensor 122 for detecting the position and the inclination angle of the frame body 3. Of course, in other embodiments, a controller integrated with the position sensor 122 disposed on the movable plate 120 may be used alternatively. The position sensor 122 is used for feeding back the offset and the deflection inclination of the lens frame body 3 and the lens in the Z direction, so that the displacement and the rotation angle of the upper SMA actuator 2 required to drive the lens frame body 3 and need to be adjusted and compensated are convenient to know.

In the present embodiment, with respect to the position sensor 122, the housing body 3 is provided with a magnet at a position corresponding to the position sensor, so that the position and inclination of the housing body 3 and the lens are known by the position sensor 122 detecting a change in the magnetic field. Of course, in other embodiments, such as a controller integrated with the position sensor 122, the housing body 3 is provided with a magnet corresponding to the position of the controller.

Regarding the lens frame body 3, the lens frame body 3 is provided with an embedded groove 320 facing the position sensor 122, the magnet is installed in the embedded groove 320, and the position sensor 122 and the magnet are provided in plurality, and preferably 4 in the embodiment.

In this embodiment, the movable plate 120 is movably erected on the fixed plate 110, the fixed plate 110 is fixed on the substrate 6, a third elastic arm 121 is disposed at an edge of the movable plate 120, a free end of the third elastic arm 121 is fixed on the fixed plate 110, and the movable plate 120 is movable relative to the fixed plate 110 under the constraint of the third elastic arm 121; both ends of the first SMA wire 130 are connected to the fixed plate 110 and the movable plate 120, respectively. By providing the elastic arm and mounting the movable plate 120 above the fixed plate 110, the movable plate 120 can be moved in the XY plane above the fixed plate 110 by electrically contracting the second SMA wire 210.

In the present embodiment, in order to reduce friction between the movable plate 120 and the fixed plate 110, preferably, a plurality of support bearings are disposed between the movable plate 120 and the fixed plate 110.

In the present embodiment, the first touch panel 111 is disposed on one set of opposite corners of the fixed panel 110, and the second touch panel 123 is disposed on the other set of opposite corners of the movable panel 120. The first SMA wires 130 are provided with four pieces and respectively correspond to four sides of the movable plate 120, and two ends of the first SMA wires 130 are respectively connected to the first touch plate 111 and the second touch plate 123. The fixed plate 110, the movable plate 120 and the first SMA wire 130 can be conveniently connected by arranging the first contact plate 111 and the second contact plate 123, and by arranging 4 second SMA wires 210, two of the second SMA wires 210 parallel to the X axis can respectively drive the movable plate 120 to move along two directions of the X axis, namely the forward direction and the reverse direction, and two of the second SMA wires 210 parallel to the Y axis can respectively drive the movable plate 120 to move along two directions of the Y axis, namely the forward direction and the reverse direction, so that the expansion of the focusing and anti-shake functions of the multi-axis optical anti-shake and focusing device is facilitated.

Of course, in other embodiments, 1, 2, 3, or more than 4 first SMA wires 130 may be optionally disposed according to actual needs.

In this embodiment, the multi-axis optical anti-shake and focusing apparatus further includes a substrate 6 and a cover 7, the cover 7 covers the substrate 6 and forms an accommodating cavity, the lens frame body 3, the SMA optical anti-shake actuator 1, the upper SMA actuator 2, the movable seat 4, and the like are all disposed in the accommodating cavity, and a through hole is formed in a position of the top of the cover 7 corresponding to the lens mounting hole 310. The provision of the substrate 6 and the cover 7 enables the multi-axis optical anti-shake and focusing apparatus to constitute a whole integrated module.

The multi-axis optical anti-shake and focusing device and the camera module in the technical scheme can be used in electronic equipment.

Claims

1. Multi-axis optical anti-shake and focusing apparatus, comprising:

the SMA optical anti-shake actuator comprises a fixed plate, a movable plate and a first SMA wire connecting the fixed plate and the movable plate, wherein the first SMA wire can drive the movable plate to move in an XY plane by electrifying and contracting;

the upper SMA actuator is connected to the movable plate and comprises a second SMA wire and a driven piece, and the second SMA wire is electrified and contracted to drive the driven piece to move along the Z axis; the number of the upper SMA actuators is at least 2;

the center of the frame body is provided with a lens mounting hole with an axis parallel to the Z axis, and each driven piece is connected to the frame body.

2. The multi-axis optical anti-shake and focusing apparatus according to claim 1, wherein: the driven piece surrounds the central axis of the lens mounting hole and is uniformly distributed.

3. The multi-axis optical anti-shake and focusing apparatus according to claim 1, wherein: the upper SMA actuator further comprises two actuating bodies, each actuating body comprises a connecting rod, a supporting portion and a first elastic arm, one end of each connecting rod is connected with the second SMA wire, one end of each connecting rod is elastically connected with the supporting portion, the first elastic arm is arranged between the connecting rod and the supporting portion, the first elastic arm can be elastically bent, one end of each connecting rod is hinged to the driven piece, the second SMA wire can drive the connecting rods to swing relative to the supporting portions through contraction, and the connecting rods can drive the driven pieces to move along the Z axis.

4. The multi-axis optical anti-shake and focusing apparatus according to claim 1, wherein: the glasses frame is characterized by further comprising a movable seat and a spring, the movable seat is connected to the movable plate, the upper SMA actuator is connected to the movable seat, the spring is fixedly connected with the glasses frame body, the spring is provided with a plurality of second elastic arms, one ends of the second elastic arms are connected with the movable seat, and the second elastic arms enable the spring to support the glasses frame body and enable the glasses frame body to move relative to the movable seat.

5. The multi-axis optical anti-shake and focusing apparatus according to any one of claims 1 to 4, wherein: and a position sensor for detecting the position and the inclination angle of the mirror bracket body or a controller integrated with the position sensor is arranged on the movable plate.

6. The multi-axis optical anti-shake and focusing apparatus according to claim 5, wherein: and a magnet is arranged at the position of the mirror bracket body corresponding to the position sensor or the controller.

7. The multi-axis optical anti-shake and focusing apparatus according to any one of claims 1 to 4, wherein: the movable frame of fly leaf is established on the fixed plate, the fixed plate is fixed on the base plate, the edge of fly leaf is provided with the third elastic arm, the free end of third elastic arm is fixed on the fixed plate, but the fly leaf removes under the restraint of third elastic arm relative to the fixed plate, the both ends of first SMA wire are connected respectively fixed plate and fly leaf.

8. The multi-axis optical anti-shake and focusing apparatus according to claim 7, wherein: the two opposite corners of the fixed plate are provided with first touch plates, the other opposite corners of the movable plate are provided with second touch plates, the number of the first SMA wires is four, the first SMA wires correspond to the four sides of the movable plate respectively, and two ends of the first SMA wires are connected with the first touch plates and the second touch plates respectively.

9. A camera module characterized by: a multi-axis optical anti-shake and focusing apparatus comprising the multi-axis optical system according to any one of claims 1 to 8.

10. An electronic device, characterized in that: comprising the multi-axis optical anti-shake and focus device of any of claims 1 to 8 or comprising the camera module of claim 9.