CN110764215A

CN110764215A - SMA actuation mechanism, camera module, and electronic apparatus

Info

Publication number: CN110764215A
Application number: CN201911158273.8A
Authority: CN
Inventors: 刘述伦; 计树标; 耿新龙
Original assignee: Dongguan Yadeng Electronics Co Ltd
Current assignee: Guangdong haideya Technology Co.,Ltd.
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-02-07

Abstract

The invention discloses an SMA actuation mechanism, a camera module, and an electronic apparatus. An SMA actuation mechanism comprising: the two first touch plates are conductors; the two ends of the SMA wire are respectively and electrically connected with the two first touch plates; the driven piece is in contact with one side of the SMA wire and enables the SMA wire to be bent into a V shape, the SMA wire can slide on the surface of the driven piece in a state of keeping contact with the driven piece, and when the SMA wire contracts, the bending included angle of the SMA wire is increased and the driven piece is driven to move. Has the advantages that: the SMA wire and the surface of the driven piece can slide mutually, so that the SMA wire can be automatically corrected in a tensioning state, the situation that the SMA wire is asymmetrical relative to the driven piece can be prevented, and the risk of abnormal deflection of the driven piece is reduced. The present invention relates to electronic devices.

Description

SMA actuation mechanism, camera module, and electronic apparatus

Technical Field

The present invention relates to electronic devices, and in particular to SMA actuation mechanisms, camera modules and electronic devices.

Background

An actuator (activating device) is a driving mechanism commonly used in the electronic field, and can be used for driving a camera. SMA refers to shape memory alloy (shape memory alloy) which is a driving element in an actuator. SMA is a material composed of two or more metal elements having a Shape Memory Effect (SME) by thermoelastic and martensitic transformation and inversion thereof. SMA can be deformed at a lower temperature and can restore the shape before deformation after being electrified and heated, thereby realizing electrically-controlled contraction.

Insert Molding bases (Insert Molding bases) include a set of inserts and a body that is typically plastic, with the set of inserts typically being a different material than plastic. The injection mold body is typically formed by injection molding after the insert is formed. The insert group can be used as a framework of the injection mold body, and the structural strength of the insert molding base can be enhanced.

Camera modules provided with SMA actuation mechanisms typically also include a lens assembly with a plurality of lenses to enable imaging functionality. The SMA actuation mechanism requires movement of the lens assembly from various different directions to effect adjustment of the position and orientation of the lens assembly.

The lens assembly can be driven by the SMA actuating mechanism in the camera module to focus and prevent shaking. The technical defects of the camera module provided with the SMA actuating mechanism in the prior art are as follows: the SMA actuation mechanism is complex in structure, resulting in a large occupied volume of the SMA actuation mechanism and high difficulty in manufacturing. In addition, in order to achieve focusing and anti-shake of the camera module, multiple sets of SMA actuation mechanisms are generally required to be disposed in the camera module, which leads to a more significant problem of large occupied volume and high manufacturing difficulty.

Disclosure of Invention

The present invention is directed to solve at least one of the problems of the prior art, and to provide an SMA actuation mechanism, a camera module, and an electronic device having a simple structure.

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

an SMA actuation mechanism comprising: the two first touch plates are conductors; the two ends of the SMA wire are respectively and electrically connected with the two first touch plates; the driven piece is in contact with one side of the SMA wire and enables the SMA wire to be bent into a V shape, the SMA wire can slide on the surface of the driven piece in a state of keeping contact with the driven piece, and when the SMA wire contracts, the bending included angle of the SMA wire is increased and the driven piece is driven to move.

The SMA actuating mechanism at least has the following beneficial effects:

the SMA wire is bent into a V shape and is contacted with the surface of the driven piece, so that the driven piece can be driven to move, and the SMA actuating mechanism has a simple and compact structure and is easy to manufacture. The SMA wire and the surface of the driven piece can slide mutually, so that the SMA wire can be automatically corrected in a tensioning state, the situation that the SMA wire is asymmetrical relative to the driven piece can be prevented, and the risk of abnormal deflection of the driven piece is reduced.

In a possible embodiment of the invention, the driven member is provided with a groove, a rib is arranged in the groove, the rib protrudes from the groove bottom of the groove, and the SMA wire is in contact with the rib and can slide relative to the rib. The SMA wire can be embedded into the groove, so that the SMA wire is not easy to be separated from the groove, and the risk of dislocation and loosening of the SMA wire is reduced; the convex edge and the SMA wire form point contact, which is beneficial to the flexible sliding of the SMA wire.

A camera module comprising an SMA actuation mechanism.

In one possible embodiment of the present invention, the camera module further includes a lens assembly, the lens assembly includes a frame body, and the driven member is integrally formed with the frame body. The driven piece and the mirror bracket body are integrally formed, so that the integral structure of the camera module is simplified, and the structure between the driven piece and the mirror bracket body is stable and reliable.

In one possible embodiment of the invention, the SMA actuation mechanism includes at least one first SMA actuation mechanism and at least one second SMA actuation mechanism, the first SMA actuation mechanism and the second SMA actuation mechanism drive the driven member in opposite directions, and the driven members of the first SMA actuation mechanism and the second SMA actuation mechanism are respectively fixedly connected with the mirror frame body. The first SMA actuating mechanism and the second SMA actuating mechanism can drive the driven piece to the opposite directions, so that the inclination angle adjustment and the position adjustment of the lens frame body can be realized, and the focusing and anti-shaking functions of the camera module can be expanded.

In one possible embodiment of the present invention, the number of the first SMA actuation mechanisms is two, the number of the second SMA actuation mechanisms is two, the two first SMA actuation mechanisms and the two second SMA actuation mechanisms are respectively arranged around the mirror frame body, the two first SMA actuation mechanisms are symmetrically arranged with respect to the mirror frame body, and the two second SMA actuation mechanisms are symmetrically arranged with respect to the mirror frame body. The two first SMA actuating mechanisms and the two second SMA actuating mechanisms are respectively and symmetrically arranged at two sides of the mirror bracket body, so that the functions of inclination angle adjustment and position adjustment of the camera module can be further expanded, and the functions of focusing and anti-shaking of the camera module can be further expanded.

In a possible implementation manner of the present invention, the camera module further includes a base assembly, the lens assembly further includes a first spring, the lens frame body is fixedly connected to the first spring, a plurality of elastic arms are disposed between the first spring and the base assembly, and one end of each elastic arm is fixedly connected to the base assembly and elastically suspends the lens frame body on the base assembly; the base assembly comprises an insert group and an injection mold body, the insert group comprises a first insert, a second insert, a third insert, a fourth insert, a fifth insert and a sixth insert, and the injection mold body is wrapped outside the insert group through insert molding; the first insert, the second insert, the third insert and the fourth insert are respectively provided with a second contact plate, the second contact plate extends out of the injection mold body, the first insert, the second insert, the third insert and the fourth insert are respectively provided with a first control end, a second control end, a third control end and a fourth control end which extend out of the injection mold body, the fifth insert and the sixth insert are respectively provided with a third contact plate which extends out of the injection mold body, the fifth insert and/or the sixth insert are/is provided with a common end which extends out of the injection mold body, the fifth insert and the sixth insert are connected and form the same common end, one of the first contact plates on each SMA actuating mechanism is respectively contacted with the first insert, the second insert, the third insert and the second contact plate on the fourth insert to form electric connection, the other one of the first contact plates on each SMA actuating mechanism is respectively contacted with the third contact plate on the fifth insert or the sixth insert to form electric connection, thereby electrically connecting each SMA actuation mechanism between the common terminal and the first control terminal, the second control terminal, the third control terminal or the fourth control terminal. The common end, the first control end, the second control end, the third control end and the fourth control end enable each SMA actuating mechanism to be independently controlled respectively, and the focusing and anti-shaking functions of the camera module can be expanded; the injection mold body is wrapped outside the insert assembly through insert molding, so that the structural strength of the base assembly is enhanced, circuits connected with the SMA actuating mechanisms can be wrapped in the injection mold body, and the camera module is compact in structure.

In a possible embodiment of the invention, the fifth insert and the sixth insert are further provided with a fourth contact plate, the fourth contact plate extends out of the injection mold, the first spring is respectively in contact with the fourth contact plate on the fifth insert and the sixth insert, and the first spring is a conductor. The first spring can form an electric connection for the fifth insert and the sixth insert, so that the structure of the camera module can be more compact.

In a possible embodiment of the present invention, the fifth insert and the sixth insert are further provided with a fourth contact plate, the fourth contact plate extends out of the injection mold body, the injection mold body is further provided with a connecting member, and two ends of the connecting member are respectively contacted with and electrically connected with the fourth contact plates on the fifth insert and the sixth insert. The connecting piece is arranged outside the injection mold body, so that the overall structure of the insert group is simplified, and the fifth insert and the sixth insert which are originally independent from each other can form the same common end.

An electronic device includes an SMA actuation mechanism.

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 a schematic structural diagram of a camera module according to an embodiment of the invention;

FIG. 2 is an exploded view of a camera module according to an embodiment of the invention;

FIG. 3 is a schematic representation of the relative positions of a first SMA actuation mechanism and a second SMA actuation mechanism of an embodiment of the invention;

FIG. 4 is a schematic structural diagram of an insert group according to an embodiment of the present invention;

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

FIG. 6 is a schematic structural diagram of a lens assembly according to an embodiment of the present invention;

FIG. 7 is a schematic circuit diagram of an SMA actuation mechanism of an embodiment of the invention;

FIG. 8 is a schematic diagram of the operation of a first SMA actuation mechanism of an embodiment of the invention;

FIG. 9 is a schematic diagram of the operation of a second SMA actuation mechanism of an embodiment of the invention;

FIG. 10 is a schematic diagram of the relative positions of the driven member and the SMA wire in accordance with an embodiment of the invention;

reference numerals:

the SMA actuating mechanism 1, the SMA wire 110, the first contact plate 120, the driven piece 130, the convex rib 131 and the groove 132;

the lens assembly 2, the lens frame body 210, the elastic arm 220, the first spring 230 and the second spring 240;

the base assembly 3, the injection molded body 300d, the insert set 300, the first insert 310, the second insert 320, the third insert 330, the fourth insert 340, the fifth insert 350, the sixth insert 360, the first control terminal 311, the second control terminal 321, the third control terminal 331, the fourth control terminal 341, the common terminal 361, the second contact plate 300a, the third contact plate 300b, the fourth contact plate 300c, and the connecting member 370.

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 10, an SMA actuation mechanism 1 includes: two first touch pads 120, the first touch pads 120 being conductors; the two ends of the SMA wire 110 are respectively electrically connected with the two first contact plates 120; the driven element 130, the driven element 130 contacts with one side of the SMA wire 110 and bends the SMA wire 110 into a V shape, the SMA wire 110 can slide on the surface of the driven element 130 in a state of keeping contact with the driven element 130, and when the SMA wire 110 contracts, the bending angle of the SMA wire 110 increases and drives the driven element 130 to move.

The SMA actuation mechanism 1 described above has at least the following beneficial effects:

the SMA wire 110 is bent into a V shape and contacts with the surface of the driven member 130, so that the driven member 130 can be moved, and the SMA actuation mechanism 1 has a simple, compact and easy manufacturing structure. The SMA wire 110 and the surface of the driven member 130 can slide relative to each other, so that the SMA wire 110 can be automatically corrected in a tensioning state, the situation that the SMA wire 110 is asymmetrical relative to the driven member 130 can be prevented, and the risk of abnormal deflection of the driven member 130 is favorably reduced.

As for the first contact plate 120, the first contact plate 120 is a metal plate. The first touch plate 120 is fixed to the base member 3.

With respect to SMA wire 110, SMA wire 110 refers to a shape memory alloy wire. The two ends of the SMA wire 110 are energized through the first contact plate 120. The SMA wire 110 is retractable when it is heated by power-on, and is extendable and restored to its original length after power-off and temperature reduction. Thus, the SMA wire 110 can achieve electrically controlled contraction. The two sections of SMA wires 110 are symmetrically arranged and have an included angle greater than zero, and in this embodiment, are in a V shape. As shown in fig. 8 and 9, the contraction motions of the two lengths of SMA wire 110 may be combined into a linear motion of the driven member 130.

With respect to the driven member 130, the driven member 130 is integrally formed with the lens frame body 210. When the SMA wire 110 pulls the driven member 130, the mirror holder body 210 is driven to move, thereby achieving the angular and positional adjustment of the mirror holder body 210.

Regarding the frame body 210, a driven member 130 is provided on each of four sides of the frame body 210.

In this embodiment, the driven member 130 is provided with a groove 132, a rib 131 is provided in the groove 132, the rib 131 protrudes from the bottom of the groove 132, and the SMA wire 110 contacts with the rib 131 and can slide relative to the rib 131. The SMA wire 110 can be embedded into the groove 132, so that the SMA wire 110 is not easy to be separated from the groove 132, and the risk of dislocation and loosening of the SMA wire 110 is reduced; the protruding ribs 131 form point contact with the SMA wire 110, which facilitates flexible sliding of the SMA wire 110.

Regarding the rib 131, the length direction of the rib 131 is the same as the width direction of the groove 132, and when the SMA wire 110 slides in the groove 132, the SMA wire 110 is perpendicular to the length direction of the rib 131. So that the SMA wire 110 may make point contact with the protruding ridge 131 when it is tightened.

A camera module comprising an SMA actuation mechanism 1.

In this embodiment, the camera module further includes a lens assembly 2, the lens assembly 2 includes a lens frame body 210, and the driven member 130 is integrally formed with the lens frame body 210. The driven element 130 and the lens frame 210 are integrally formed, which is beneficial to simplifying the overall structure of the camera module and making the structure between the driven element 130 and the lens frame 210 stable and reliable.

Regarding the frame body 210, the frame body 210 is made of plastic, and the frame body 210 and the driven member 130 can be integrally formed by an injection molding process.

In this embodiment, the SMA actuation mechanism 1 includes at least one first SMA actuation mechanism and at least one second SMA actuation mechanism, the first SMA actuation mechanism and the second SMA actuation mechanism drive the driven member 130 in opposite directions, and the driven members 130 of the first SMA actuation mechanism and the second SMA actuation mechanism are respectively fixedly connected to the mirror frame body 210. The first SMA actuating mechanism and the second SMA actuating mechanism can drive the driven member 130 in opposite directions, so that the tilt angle adjustment and the position adjustment of the frame body 210 can be realized, which is beneficial to expanding the focusing and anti-shake functions of the camera module.

Regarding the frame body 210, the frame body 210 has a ring shape, and a plurality of lenses can be inserted into the frame body 210, so that an imaging function can be realized. The driven member 130 is fixedly connected to the outside of the frame body 210.

In this embodiment, the number of the first SMA actuation mechanisms is two, the number of the second SMA actuation mechanisms is two, the two first SMA actuation mechanisms and the two second SMA actuation mechanisms are respectively disposed around the mirror frame body 210, the two first SMA actuation mechanisms are symmetrically disposed with respect to the mirror frame body 210, and the two second SMA actuation mechanisms are symmetrically disposed with respect to the mirror frame body 210. The two first SMA actuation mechanisms and the two second SMA actuation mechanisms are respectively symmetrically arranged at two sides of the lens frame body 210, which is beneficial to further expanding the tilt angle adjustment and position adjustment functions of the camera module, and is beneficial to further expanding the focusing and anti-shake functions of the camera module.

In this embodiment, the camera module further includes a base assembly 3, the lens assembly 2 further includes a first spring 230, the lens frame body 210 is fixedly connected to the first spring 230, a plurality of elastic arms 220 are disposed between the first spring 230 and the base assembly 3, and one end of each elastic arm 220 is fixedly connected to the base assembly 3 and elastically hangs the lens frame body 210 on the base assembly 3; the base assembly 3 comprises an insert set 300 and an injection mold body 300d, wherein the insert set 300 comprises a first insert 310, a second insert 320, a third insert 330, a fourth insert 340, a fifth insert 350 and a sixth insert 360, and the injection mold body 300d is wrapped outside the insert set 300 through insert molding; the first insert 310, the second insert 320, the third insert 330 and the fourth insert 340 are respectively provided with a second contact plate 300a, the second contact plate 300a extends out of the injection mold body 300d, the first insert 310, the second insert 320, the third insert 330 and the fourth insert 340 are respectively provided with a first control end 311, a second control end 321, a third control end 331 and a fourth control end 341 which extend out of the injection mold body 300d, the fifth insert 350 and the sixth insert 360 are respectively provided with a third contact plate 300b which extends out of the injection mold body 300d, the fifth insert 350 and/or the sixth insert 360 are/is provided with a common end 361 which extends out of the injection mold body 300d, the fifth insert 350 is connected with the sixth insert 360 and forms the same common end 361, one of the first contact plates 120 on each SMA actuating mechanism 1 is respectively contacted with the second contact plates 300a on the first insert 310, the second insert 320, the third insert 330 and the fourth insert 340 to form an electrical connection, the other first contact plate 120 in each SMA actuation mechanism 1 is in contact with and forms an electrical connection with the third contact plate 300b on the fifth insert 350 or the sixth insert 360, respectively, so that each SMA actuation mechanism 1 forms an electrical connection between the common terminal 361 and the first control terminal 311, the second control terminal 321, the third control terminal 331 or the fourth control terminal 341. The common terminal 361, the first control terminal 311, the second control terminal 321, the third control terminal 331 and the fourth control terminal 341 enable each SMA actuating mechanism 1 to be independently controlled, which is beneficial to expanding the focusing and anti-shake functions of the camera module; the injection mold body 300d is wrapped outside the insert assembly 300 through insert molding, which is beneficial to enhancing the structural strength of the base assembly 3, and the circuits connecting the SMA actuating mechanisms 1 can be wrapped in the injection mold body 300d, which is beneficial to the compact structure of the camera module.

Regarding the injection mold body 300d, the material of the injection mold body 300d is plastic, so as to facilitate molding and have insulating properties.

As for the touch panels, the respective first touch panel 120, second touch panel 300a, and third touch panel 300b are disposed at four corners of the base assembly 3, respectively, which is advantageous for making the structure of the camera module more compact.

Regarding the control terminals, the first control terminal 311, the second control terminal 321, the third control terminal 331, the fourth control terminal 341 and the common terminal 361 are disposed at one side of the base assembly 3, which is beneficial to facilitate wiring.

Regarding the lens assembly 2, the lens assembly 2 further includes a second spring 240, the first spring 230 and the second spring 240 are respectively attached to two sides of the frame body 210, four elastic arms 220 are respectively disposed around the first spring 230 and the second spring 240, one end of each elastic arm 220 is fixedly connected to the base assembly 3, and the elastic arms 220 can elastically deform to provide elastic suspension for the frame body 210, so that the frame body 210 can be in a suspended state, and the frame body 210 is easy to drive.

With respect to the first spring and the second spring, the first spring and the second spring constitute a suspension system of the lens assembly. The first spring and the second spring herein do not refer to a coil spring, a spiral spring or a plate spring which are common in the mechanical field, but are special springs for hanging the lens assembly. The first spring and the second spring are in a sheet shape and are respectively attached to the mirror frame body from two sides of the lens assembly.

In this embodiment, the fifth insert 350 and the sixth insert 360 are further provided with a fourth contact plate 300c, the fourth contact plate 300c extends out of the injection mold body 300d, the first spring 230 is in contact with the fourth contact plate 300c on the fifth insert 350 and the sixth insert 360, respectively, and the first spring 230 is a conductor. The first spring 230 can form an electrical connection for the fifth insert 350 and the sixth insert 360, which can make the camera module more compact.

With respect to the first spring, the second spring, and the fourth contact pads, each of the fourth contact pads may form a common terminal by contacting the first spring. Each fourth contact pad may also form a common terminal by contacting the second spring. Each of the fourth contact pads may also form a common terminal by simultaneously contacting the first spring and the second spring.

Regarding the first spring 230, the first spring 230 is made of metal. The first spring 230 contacts the two fourth contact plates 300c such that the fifth insert 350 and the sixth insert 360 form the same common end 361.

In this embodiment, the fifth insert 350 and the sixth insert 360 are further provided with a fourth contact plate 300c, the fourth contact plate 300c extends out of the injection mold body 300d, the injection mold body 300d is further provided with a connecting member 370, and two ends of the connecting member 370 are respectively contacted with and electrically connected to the fourth contact plates 300c of the fifth insert 350 and the sixth insert 360. The connecting member 370 is disposed outside the injection mold body 300d, which is beneficial to simplify the overall structure of the insert set 300, so that the fifth insert 350 and the sixth insert 360, which are originally independent from each other, can form the same common end 361.

The SMA actuation mechanism 1 and camera module of the present solution may be used in respective electronic devices.

Claims

An SMA actuation mechanism, comprising:

the two first touch panels are conductors;

the two ends of the SMA wire are respectively and electrically connected with the two first touch plates;

the driven piece is in contact with one side of the SMA wire and enables the SMA wire to be bent into a V shape, the SMA wire can slide on the surface of the driven piece under the state of keeping contact with the driven piece, and when the SMA wire contracts, the bending included angle of the SMA wire is increased and the driven piece is driven to move.
2. The SMA actuation mechanism of claim 1, wherein: the driven piece is provided with a groove, a convex rib is arranged in the groove, the convex rib protrudes from the groove bottom of the groove, and the SMA wire is in contact with the convex rib and can slide relative to the convex rib.
3. A camera module characterized by: comprising an SMA actuation mechanism according to claim 1 or 2.
4. The camera module of claim 3, wherein: still include the lens subassembly, the lens subassembly includes the mirror holder body, driven piece with the mirror holder body is integrated into one piece.
5. The camera module of claim 4, wherein: the SMA actuation mechanisms include at least one first SMA actuation mechanism and/or at least one second SMA actuation mechanism that drive the driven member in opposite directions.
6. The camera module according to claim 5, characterized in that one of the following conditions is satisfied:

the camera module comprises two of the first SMA actuation mechanisms;

or the camera module comprises two of the second SMA actuation mechanisms;

or the camera module comprises four of the first SMA actuation mechanisms;

or the camera module comprises four of the second SMA actuation mechanisms;

or the camera module comprises two of the first SMA actuation mechanisms and two of the second SMA actuation mechanisms.
7. The camera module of claim 6, wherein: the lens component further comprises a base component, the lens component further comprises a first spring, the lens frame body is fixedly connected with the first spring, a plurality of elastic arms are arranged between the first spring and the base component, and one ends of the elastic arms are fixedly connected with the base component and enable the lens frame body to be elastically hung on the base component; the base assembly comprises an insert group and an injection mold body, the insert group comprises a first insert, a second insert, a third insert, a fourth insert, a fifth insert and a sixth insert, and the injection mold body is wrapped outside the insert group through insert molding; the first insert, the second insert, the third insert and the fourth insert are respectively provided with a second touch panel, the second touch panel extends out of the injection mold body, the first insert, the second insert, the third insert and the fourth insert are respectively provided with a first control end, a second control end, a third control end and a fourth control end which extend out of the injection mold body, the fifth insert and the sixth insert are respectively provided with a third touch panel which extends out of the injection mold body, a common end which extends out of the injection mold body is arranged on the fifth insert and/or the sixth insert, the fifth insert and the sixth insert are connected to form the same common end, one of the first touch panels on the SMA actuating mechanism is respectively contacted with the first insert, the second insert, the third insert and the second touch panel on the fourth insert to form an electric connection, the other first contact plate in each SMA actuation mechanism is in contact with and electrically connected with the third contact plate on the fifth insert or the sixth insert, respectively, so that each SMA actuation mechanism is electrically connected between the common end and the first control end, the second control end, the third control end or the fourth control end.
8. The camera module of claim 7, wherein: the fifth insert and the sixth insert are further provided with fourth contact plates, the fourth contact plates extend out of the injection mold body, and the fourth contact plates between the fifth insert and the sixth insert meet one of the following relations:

the first spring is respectively contacted with the fourth touch plates on the fifth insert and the sixth insert, and the first spring is a conductor;

or the injection mold body is also provided with a connecting piece, and two ends of the connecting piece are respectively contacted with the fifth insert and the fourth contact plate on the sixth insert to form electric connection.
9. The camera module of claim 8, wherein: the camera module further comprises a second spring, the second spring is fixedly connected with the mirror bracket body, the second spring is a conductor, and one of the following relations is satisfied among the fourth touch plate, the first spring and the second spring:

the fourth contact pads on the fifth and sixth inserts form the common end by contacting the second spring;

or the fourth contact pads on the fifth and sixth inserts form the common terminal by simultaneously contacting the first and second springs.
10. An electronic device, characterized in that: comprising an SMA actuation mechanism according to claim 1 or 2.