SMA actuator, camera module and electronic device

Abstract

The present invention discloses an SMA actuator, a camera module and an electronic device. The SMA actuator comprises: a base assembly, the base assembly comprises an insert group and an injection mold body, the injection mold body is wrapped outside the insert group, the insert group comprises a plurality of inserts, each insert is embedded in the injection mold body, a first touch panel is provided on the insert, the first touch panel extends out of the injection mold body, and different inserts extend out of the injection mold body and form a plurality of control terminals and a plurality of common terminals respectively; a plurality of actuator assemblies, the actuator assembly comprises a plurality of actuator bodies and SMA wires, the actuator body comprises a second touch panel and a movable part, the SMA wire can drive the movable part to move by contraction, the SMA wire forms an electrical connection with the first touch panel through the second touch panel, and each second touch panel contacts each first touch panel to form an electrical connection. Beneficial effect: the insert group can act as a circuit for energizing the SMA wire, so that the SMA actuator has a compact structure. The present invention relates to an actuator in the field of electronics.

Description

Technical Field

[0001] The present invention relates to an actuating device in the electronic field, and in particular to an SMA actuating device, a camera module and an electronic device. Background Art

[0002] An actuating device is a commonly used driving mechanism in the electronics field and can be used to drive a camera. SMA refers to shape memory alloy, which is a driving element in an actuating device. SMA is a material composed of two or more metal elements that has a shape memory effect (SME) through thermoelasticity and martensitic phase transformation and its inversion. SMA can be deformed at a relatively low temperature and can restore its shape before deformation after being electrically heated, thereby achieving electrically controllable contraction.

[0003] The Insert Molding Bottom includes an insert assembly and an injection mold body. The injection mold body is generally made of plastic, while the insert assembly is generally made of a different material other than plastic. The injection mold body is generally formed by injection molding after the insert assembly is molded. The insert assembly can serve as the skeleton of the injection mold body and can enhance the structural strength of the Insert Molding Bottom.

[0004] The camera module with the SMA actuator generally includes a lens assembly, on which a plurality of lenses are arranged. The SMA actuator needs to drive the lens assembly to move in different directions, so as to adjust the position and direction of the lens assembly.

[0005] The technical defect of the SMA actuator in the prior art is that the SMA actuator needs to be driven from multiple different directions, which requires multiple actuator components to achieve this, resulting in a relatively complex circuit of the SMA actuator. Generally, a relatively complex jumper structure needs to be configured, resulting in a complex overall structure of the SMA actuator, which is not conducive to the miniaturization and low cost of the SMA actuator. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a SMA actuating device, a camera module and an electronic device with a compact structure.

[0007] The technical solutions adopted to solve the above technical problems are:

[0008] The SMA actuating device comprises: a base assembly, the base assembly comprises an insert group and an injection mold body, the injection mold body is wrapped outside the insert group, the insert group comprises a plurality of inserts, each insert is embedded in the injection mold body, a first touch plate is arranged on the insert, the first touch plate extends out of the injection mold body, and different inserts extend out of the injection mold body respectively and form a plurality of control terminals and a plurality of common terminals respectively; a plurality of actuating assemblies, the actuating assemblies comprise a plurality of actuating bodies and SMA wires, the actuating bodies comprise a second touch plate and a movable part, the SMA wire can drive the movable part to move by contraction, the SMA wire forms an electrical connection with the first touch plate through the second touch plate, and each second touch plate contacts with each first touch plate to form an electrical connection.

[0009] The above-mentioned SMA actuating device has at least the following beneficial effects:

[0010] The SMA wire can drive the movable part to move, thereby outputting power. The insert assembly can act as a circuit to energize the SMA wire in the injection mold body, which can reduce the use of wires, make the SMA actuator structure compact, help reduce the manufacturing cost of the SMA actuator, and also enhance the structural strength of the base assembly.

[0011] The camera module includes an SMA actuator and a lens assembly; the lens assembly includes a frame body, the frame body is movably connected to the base assembly, the movable part is a connecting rod, one end of the connecting rod is hinged to the frame body, and the SMA line pulls the connecting rod to move and drives the frame body to move by contraction. A lens can be installed in the frame body, and the SMA line can drive the frame body through the connecting rod, so as to achieve focus or anti-shake of the camera module.

[0012] In a possible implementation of the present invention, a first elastic arm is further provided between the second touch panel and the connecting rod, the second touch panel, the first elastic arm and the connecting rod are conductors and are integrally formed, and the SMA wire can drive the connecting rod to swing on the second touch panel by contraction and cause the first elastic arm to elastically deform. The first elastic arm enables the connecting rod to elastically swing on the second touch panel, so that the connecting rod can be elastically reset; the first elastic arm is integrally formed with the connecting rod and the second touch panel, which is conducive to simplifying the structure of the actuator.

[0013] In a possible implementation manner of the present invention, there are four actuating assemblies, each actuating assembly includes two actuating bodies arranged symmetrically, the inserts include a first insert, a second insert, a third insert, a fourth insert, a fifth insert, a sixth insert, a seventh insert and an eighth insert, the control ends include a first control end, a second control end, a third control end and a fourth control end, the first control end is arranged on the first insert, the second control end is arranged on the second insert, the third control end is arranged on the third insert, and the fourth control end is arranged on the fourth insert, the common end includes a first common end, the fifth insert, the sixth insert and the first common end are electrically connected, the first insert, the second insert, the third insert and the fourth insert are respectively electrically connected to one of the second touch plates of each actuating assembly through the first touch plate, and the fifth insert and the sixth insert are respectively electrically connected to one of the second touch plates of each actuating assembly through the first touch plate. The common end and each control end can be energized by four SMA wires respectively, so that the four actuator components can be independently controlled. Each insert is buried in the injection molded body, which can avoid jumper wires outside the injection molded body, making the camera module compact and the base assembly structurally strong. Avoiding jumper wires outside the injection molded body is also beneficial to reducing the overall manufacturing cost of the camera module.

[0014] In a possible implementation of the present invention, the lens assembly further includes a first spring, the first spring is fixedly connected to the frame body, a plurality of second elastic arms are provided around the first spring and between the base assembly, each second elastic arm can elastically deform to suspend the frame body on the base assembly, the fifth insert and the sixth insert are further provided with third touch plates, the third touch plates pass through the injection mold body and contact the first spring respectively, the first spring is a conductor, and the fifth insert and the sixth insert are electrically connected through the first spring. The first spring enables the lens assembly to form a suspension structure that can reciprocate elastically, and enables the fifth insert and the sixth insert to be electrically connected, which can further simplify the electrical connection structure between the fifth insert and the sixth insert, and is conducive to making the camera module structure compact.

[0015] In a possible implementation of the present invention, the third touch pad protrudes from the fifth insert and the sixth insert toward the direction of the first spring, and one side of the third touch pad is exposed on the surface of the injection molded body. The third touch pad protrudes from the fifth insert and the sixth insert toward the direction of the first spring and is exposed on the surface of the injection molded body, so that welding between the first spring and the third touch pad is easily achieved.

[0016] In a possible implementation of the present invention, the common terminal further includes a second common terminal, which is arranged on the fifth insert and extends out of the injection molded body. The second common terminal expands the number of common terminals, making it easier to connect the common terminal to the external circuit.

[0017] In a possible implementation of the present invention, a fourth touch pad is provided on the fifth insert and the sixth insert, respectively, and a connector is provided between the fifth insert and the sixth insert, the connector is a conductor, the fourth touch pad protrudes from the fifth insert and the sixth insert to the surface of the injection molded body, and the two ends of the connector are in contact with the fourth touch pads on the fifth insert and the sixth insert, respectively. The connector electrically connects the fifth insert and the sixth insert through the fourth touch pad, which can avoid jumper wires between the fifth insert and the sixth insert, and is conducive to simplifying the overall structure of the insert group, thereby making the base assembly structure compact.

[0018] Electronic device including an SMA actuation device.

[0019] An electronic device includes a camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a structural schematic diagram of a camera module according to Embodiment 1 of the present invention;

[0022] Figure 2 is an exploded schematic diagram of a camera module according to Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic structural diagram of an insert assembly according to Embodiment 1 of the present invention;

[0024] Figure 4 Schematic diagram of the arrangement of the actuating assembly of Example 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the arrangement of the first spring and the second spring in Example 1 of the present invention;

[0026] Figure 6 Schematic diagram of the circuit structure of embodiment 1 of the present invention;

[0027] Figure 7 This is a schematic structural diagram of a base assembly according to Embodiment 1 of the present invention;

[0028] Figure 8 is a structural schematic diagram of a lens assembly according to Embodiment 1 of the present invention;

[0029] Fig. 9 Schematic diagram of the circuit structure of Embodiment 2 of the present invention;

[0030] Fig.10 Schematic diagram of the circuit structure of Embodiment 3 of the present invention;

[0031] Fig.11 This is a schematic diagram of the arrangement of the connecting members of Example 3 of the present invention;

[0032] Reference numerals:

[0033] Base assembly 1, insert group 110, injection mold body 120, first insert 111, second insert 112, third insert 113, fourth insert 114, fifth insert 115, sixth insert 116, first control terminal 110a, second control terminal 110b, third control terminal 110c, fourth control terminal 110d, first common terminal 110e, second common terminal 110f, first touch pad 110g, third touch pad 110h, fourth touch pad 110i, connector 110j;

[0034] Actuating assembly 2, actuating body 210, SMA wire 220, second touch plate 211, first elastic arm 212, connecting rod 213;

[0035] The lens assembly 3 , the first spring 310 , the second spring 320 , the frame body 330 , and the second elastic arm 340 . DETAILED DESCRIPTION

[0036] Embodiment 1:

[0037] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] like Figures 1 to 8 As shown, the camera module includes an SMA actuator and a lens assembly 3; the lens assembly 3 includes a frame body 330, which is movably connected to the base assembly 1, and the movable part is a connecting rod 213, one end of the connecting rod 213 is hinged to the frame body 330, and the SMA wire 220 pulls the connecting rod 213 to move by contraction and drives the frame body 330 to move. A lens can be installed in the frame body 330, and the SMA wire 220 can drive the frame body 330 through the connecting rod 213, so as to achieve focus or anti-shake of the camera module.

[0042] Regarding the frame body 330 , a lens is arranged inside the frame body 330 , but the lens is not shown in the drawings. The frame body 330 is generally annular, a through hole is arranged in the center of the base component 1 , the frame body 330 is arranged in the through hole, and the base component 1 surrounds the frame body 330 .

[0043] The SMA actuating device comprises: a base component 1, the base component 1 comprises an insert group 110 and an injection mold body 120, the injection mold body 120 is wrapped outside the insert group 110, the insert group 110 comprises a plurality of inserts, each of which is embedded in the injection mold body 120, and a first touch plate 110g is provided on the insert, the first touch plate 110g extends out of the injection mold body 120, and different inserts extend out of the injection mold body 120 respectively and form a plurality of control terminals and a plurality of common terminals respectively; a plurality of actuating components 2, the actuating components 2 comprise a plurality of actuating bodies 210 and SMA wires 220, the actuating body 210 comprises a second touch plate 211 and a movable part, the SMA wire 220 can drive the movable part to move by contraction, the SMA wire 220 forms an electrical connection with the first touch plate 110g through the second touch plate 211, and each second touch plate 211 contacts each first touch plate 110g to form an electrical connection.

[0044] The above-mentioned SMA actuating device has at least the following beneficial effects:

[0045] The SMA wire 220 can drive the movable part to move, thereby outputting power. The insert assembly 110 in the injection mold body 120 can act as a circuit for energizing the SMA wire 220, which can reduce the use of wires, make the SMA actuator structure compact, help reduce the manufacturing cost of the SMA actuator, and also enhance the structural strength of the base assembly 1.

[0046] Regarding the base assembly 1, the insert set 110 includes six inserts, which are conductors. The injection molded body 120 is made of plastic. The common terminal and the control terminal extend outward from the periphery of the injection molded body 120. The injection molded body 120 wraps around the edge of the first touch panel 110g, and one side of the first touch panel 110g is exposed on the surface of the injection molded body 120.

[0047] Regarding the actuating assembly 2, the actuating assembly 2 includes two actuating bodies 210 arranged symmetrically, a second touch plate 211 is fixed on the surface of the base assembly 1, and the second touch plate 211 and the first touch plate 110g are attached to each other and electrically connected by welding.

[0048] In this embodiment, a first elastic arm 212 is further provided between the second touch panel 211 and the connecting rod 213. The second touch panel 211, the first elastic arm 212 and the connecting rod 213 are conductors and are integrally formed. The SMA wire 220 can drive the connecting rod 213 to swing on the second touch panel 211 by contraction and cause the first elastic arm 212 to elastically deform. The first elastic arm 212 allows the connecting rod 213 to elastically swing on the second touch panel 211, so that the connecting rod 213 can be elastically reset; the first elastic arm 212, the connecting rod 213 and the second touch panel 211 are integrally formed, which is conducive to simplifying the structure of the actuator 210.

[0049] Regarding the actuating body 210 , the actuating body 210 is a metal conductor having elasticity, so that electricity can be passed between the second contact plate 211 , the first elastic arm 212 , the connecting rod 213 and the SMA wire 220 .

[0050] In this embodiment, the number of the actuating components 2 is four, each of the actuating components 2 includes two actuating bodies 210 arranged symmetrically, the inserts include a first insert 111, a second insert 112, a third insert 113, a fourth insert 114, a fifth insert 115, a sixth insert 116, a seventh insert and an eighth insert, and the control end includes a first control end 110a, a second control end 110b, a third control end 110c and a fourth control end 110d, the first control end 110a is arranged on the first insert 111, the second control end 110b is arranged on the second insert 112, and the third control end 110c is arranged on the fourth insert 110d. 10c is arranged on the third insert 113, the fourth control terminal 110d is arranged on the fourth insert 114, the common end includes the first common terminal 110e, the fifth insert 115, the sixth insert 116 and the first common terminal 110e are electrically connected, the first insert 111, the second insert 112, the third insert 113 and the fourth insert 114 are respectively electrically connected to one of the second touch plates 211 of each actuating component 2 through the first touch plate 110g, and the fifth insert 115 and the sixth insert 116 are respectively electrically connected to one of the second touch plates 211 of each actuating component 2 through the first touch plate 110g. The common end and each control end can be energized by four SMA wires 220 respectively, so that the four actuator components 2 can be independently controlled. Each insert is buried in the injection mold body 120, which can avoid jumper wires outside the injection mold body 120, making the camera module compact and the base component 1 high in structural strength. Avoiding jumper wires outside the injection mold body 120 is also beneficial to reducing the overall manufacturing cost of the camera module.

[0051] Regarding the inserts, the base component 1 has a rectangular shape, and the four corners of the base component 1 are sequentially referred to as the first corner, the second corner, the third corner, and the fourth corner. The first touch panels 110g of the first insert 111 and the second insert 112 are arranged at the first corner. The first touch panels 110g of the third insert 113 and the fourth insert 114 are arranged at the third corner. Two first touch panels 110g are provided on the fifth insert 115, and the two first touch panels 110g on the fifth insert 115 are arranged at the fourth corner. Two first touch panels 110g are provided on the sixth insert 116, and the two first touch panels 110g on the sixth insert 116 are arranged at the second corner. The arrangement of the various inserts is conducive to simplifying the overall structure of the insert group 110. The various inserts are arranged around the frame body 330, such as Figure 3 As shown, the overall structure of the insert set 110 is a rectangular distribution, which is conducive to being distributed as evenly as possible in the injection mold body 120 and can improve the overall structural strength of the injection mold body 120.

[0052] Regarding the control ends, the first control end 110 a , the second control end 110 b , the third control end 110 c , and the fourth control end 110 d are arranged between the first corner and the second corner of the base assembly 1 .

[0053] Regarding the common terminal, the first common terminal 110e is disposed between the first corner and the second corner of the base assembly 1. The first common terminal 110e is disposed on the sixth insert 116, and the fifth insert 115 and the sixth insert 116 are electrically connected and share the first common terminal 110e.

[0054] In this embodiment, the lens assembly 3 further includes a first spring 310, which is fixedly connected to the frame body 330. A plurality of second elastic arms 340 are provided around the first spring 310 and between the base assembly 1. Each second elastic arm 340 can suspend the frame body 330 on the base assembly 1 by elastic deformation. The fifth insert 115 and the sixth insert 116 are also provided with third touch panels 110h, respectively. The third touch panels 110h pass through the injection mold 120 and contact the first spring 310, respectively. The first spring 310 is a conductor, and the fifth insert 115 and the sixth insert 116 are electrically connected through the first spring 310. The first spring 310 enables the lens assembly 3 to form a suspension structure that can reciprocate elastically, and enables the fifth insert 115 and the sixth insert 116 to be electrically connected, which can further simplify the electrical connection structure between the fifth insert 115 and the sixth insert 116, and is conducive to making the camera module structure compact.

[0055] Regarding the lens assembly 3, the lens assembly 3 further includes a second spring 320, and the first spring 310 and the second spring 320 are respectively fitted with two sides of the frame body 330. Four second elastic arms 340 are respectively provided on the first spring 310 and the second spring 320, which can form a reliable suspension mechanism for the frame body 330. The first spring 310 and the second spring 320 are respectively integrally formed to form each second elastic arm 340. The end of the second elastic arm 340 on the first spring 310 is fixedly connected to the base assembly 1 by welding with the third contact plate 110h of the fifth insert 115 and the sixth insert 116. The end of each second elastic arm 340 can also be fixedly connected to the base assembly 1 by adhesive.

[0056] Regarding the first spring and the second spring, the first spring and the second spring constitute the suspension system of the lens assembly. The first spring and the second spring here do not refer to the common spiral spring, volute spring or leaf spring in the mechanical field, but are special-shaped springs specially used for suspending the lens assembly. The first spring and the second spring are in the shape of thin sheets, and are respectively attached to the frame body from both sides of the lens assembly.

[0057] Regarding the first spring, the second spring and the third touch pad. Each third touch pad can form a common end by contacting the first spring. Each third touch pad can also form a common end by contacting the second spring. Each third touch pad can also form a common end by contacting the first spring and the second spring at the same time.

[0058] In this embodiment, the third touch pad 110h protrudes from the fifth insert 115 and the sixth insert 116 toward the first spring 310, and one side of the third touch pad 110h is exposed on the surface of the injection molded body 120. The third touch pad 110h protrudes from the fifth insert 115 and the sixth insert 116 toward the first spring 310 and is exposed on the surface of the injection molded body 120, so that welding between the first spring 310 and the third touch pad 110h is easily achieved.

[0059] The SMA actuator and camera module in the technical solution can be used in various electronic devices.

[0060] Embodiment 2:

[0061] like Fig. 9 As shown, the difference between this embodiment and embodiment 1 is that the common terminal further includes a second common terminal 110f, which is arranged on the fifth insert 115 and extends out of the injection molded body. The second common terminal 110f expands the number of common terminals, making it easier to connect the common terminal to the external circuit.

[0062] Regarding the second common end 110f, the second common end 110f is disposed between the third and fourth corners of the base assembly.

[0063] Embodiment 3:

[0064] like Fig.10 and 11 As shown, the difference between this embodiment and the first embodiment is that: the fifth insert 115 and the sixth insert 116 are further provided with a fourth touch pad 110i, respectively; a connector 110j is further provided between the fifth insert 115 and the sixth insert 116; the connector 110j is a conductor; the fourth touch pad 110i protrudes from the fifth insert 115 and the sixth insert 116 to the surface of the injection mold body 120, respectively; and both ends of the connector 110j are in contact with the fourth touch pad 110i on the fifth insert 115 and the sixth insert 116, respectively. The connector 110j electrically connects the fifth insert 115 and the sixth insert 116 through the fourth touch pad 110i, which can avoid jumper wires between the fifth insert 115 and the sixth insert 116, and is conducive to simplifying the overall structure of the insert group 110, thereby making the base assembly 1 compact.

[0065] Regarding the fourth touch pad 110 i , the fourth touch pad 110 i protrudes from the fifth insert 115 and the sixth insert 116 , respectively, and is exposed on the surface of the injection molded body 120 .

[0066] Regarding the connector 110 j , the connector 110 j is made of metal, and the connector 110 j is attached to the surface of the injection molded body 120 . Two ends of the connector 110 j and the fourth touch pad 110 i are electrically connected by welding.

Claims

1. SMA actuator, characterized in that include: A base assembly, the base assembly includes an insert group and an injection mold body, the injection mold body is wrapped outside the insert group, the overall structure of the insert group is rectangular, the insert group includes a plurality of inserts, each insert is embedded in the injection mold body, a first touch panel is provided on the insert, the first touch panel extends out of the injection mold body, and different inserts extend respectively outside the injection mold body and form a plurality of control terminals and a plurality of common terminals respectively; Four actuating assemblies, wherein the actuating assemblies include a plurality of actuating bodies and SMA wires, wherein the actuating bodies include a second touch plate and a movable portion, wherein the SMA wires can drive the movable portion to move by contraction, wherein the SMA wires are electrically connected to the first touch plates through the second touch plates, wherein each of the second touch plates is electrically connected to each of the first touch plates, and wherein the movable portion is a connecting rod; Wherein, the insert includes a first insert, a second insert, a third insert, a fourth insert, a fifth insert, a sixth insert, a seventh insert and an eighth insert, the control end includes a first control end, a second control end, a third control end and a fourth control end, the first control end is arranged on the first insert, the second control end is arranged on the second insert, the third control end is arranged on the third insert, and the fourth control end is arranged on the fourth insert, the common end includes a first common end, the fifth insert, the sixth insert and the first common end are electrically connected, the first insert, the second insert, the third insert and the fourth insert are electrically connected to one of the second touch pads of each of the actuating components through the first touch pad, respectively, the fifth insert and the sixth insert are electrically connected to one of the second touch pads of each of the actuating components through the first touch pad, respectively; A first elastic arm is further provided between the second touch panel and the connecting rod. The second touch panel, the first elastic arm and the connecting rod are conductors and are integrally formed. The SMA wire can drive the connecting rod to swing on the second touch panel and cause the first elastic arm to undergo elastic deformation by contraction.

2. A camera module, characterized in that: The camera module includes the actuating device described in claim 1, and also includes a lens assembly, wherein the lens assembly includes a frame body, the frame body is movably connected to the base assembly, one end of the connecting rod is hinged to the frame body, and the SMA wire pulls the connecting rod to move and drives the frame body to move by contraction.

3. The camera module according to claim 2, characterized in that: Each of the actuating assemblies includes two actuating bodies that are symmetrically arranged.

4. The camera module according to claim 3, characterized in that: The lens assembly also includes a first spring, which is fixedly connected to the frame body. A plurality of second elastic arms are provided around the first spring and between the base assembly, and each of the second elastic arms can elastically deform to suspend the frame body on the base assembly. A third touch plate is also provided on the fifth insert and the sixth insert, respectively. The third touch plate passes through the injection mold body and contacts the first spring, respectively. The first spring is a conductor, and the fifth insert and the sixth insert are electrically connected through the first spring.

5. The camera module according to claim 4, characterized in that: The lens assembly further includes a second spring, the second spring is fixedly connected to the frame body, and the first spring, the second spring and the third touch plate satisfy one of the following relationships: Each of the third contact plates forms the common end by contacting the second spring; Or each of the third contact pads forms the common end by contacting the first spring and the second spring at the same time.

6. The camera module according to claim 5, characterized in that: The third touch panel protrudes from the fifth insert and the sixth insert toward the first spring, respectively, and one side of the third touch panel is exposed on the surface of the injection molded body.

7. The camera module according to claim 6, characterized in that: The common end further comprises a second common end, wherein the second common end is arranged on the fifth insert and extends out of the injection molded body.

8. The camera module according to claim 3, characterized in that: A fourth touch pad is also provided on the fifth insert and the sixth insert, respectively. A connecting member is also provided between the fifth insert and the sixth insert, and the connecting member is a conductor. The fourth touch pad protrudes from the fifth insert and the sixth insert to the surface of the injection molded body, respectively, and two ends of the connecting member are in contact with the fourth touch pad on the fifth insert and the sixth insert, respectively.

9. An electronic device, characterized in that: Comprising the SMA actuation device of claim 1.

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