Actuator and camera module

Abstract

The present invention discloses an actuator comprising: a rotary actuating structure; a translational actuating structure disposed on the rotary actuating structure; and a movable baseplate movably disposed on a side of the translational actuating structure away from the rotary actuating structure. The rotary actuating structure is configured to drive the translational actuating structure and the movable baseplate to rotate, while the translational actuating structure is configured to drive the movable baseplate to move horizontally. Application of the present invention enables both rotational and translational drive to be achieved on a single actuator.

Description

Technical Field

[0001] The present invention relates to the technical field of camera devices, and in particular to an actuator and a camera module. Background Art

[0002] Actuators are commonly used in the electronics field, driving lens units for stabilization or focusing. Shape memory alloy (SMA) is a type of driving element in actuators. SMAs are materials composed of two or more metal elements that exhibit a shape memory effect (SME) through thermoelasticity, martensitic transformation, and its inverse transformation. SMAs can deform at relatively low temperatures, contract when heated, and return to their pre-deformed shape upon cooling, achieving electrically controllable contraction. Currently, the actuator structure in actuators is typically connected using conventional wiring or printed circuits. This generates power when energized, providing force in the opposite direction of the lens unit's vibration, thereby achieving stabilization. Current actuators are typically designed to only support horizontal translation or rotation. For lens units with multiple actuation requirements, this cannot achieve the desired technical effect, or multiple actuators are required to achieve the desired functions, which in turn requires more parts and increases costs. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an actuator that can realize rotational and translational driving on one actuator.

[0004] The present invention also provides a camera module having the actuator.

[0005] An actuator according to an embodiment of the first aspect of the present invention includes:

[0006] a rotary actuation structure;

[0007] a translation actuation structure, the translation actuation structure being disposed on the rotation actuation structure;

[0008] a movable base plate, the movable base plate being movably disposed on a side of the translation actuation structure away from the rotation actuation structure;

[0009] The rotation actuating structure is used to drive the translation actuating structure and the movable base plate to rotate, and the translation actuating structure is used to drive the movable base plate to move in a horizontal direction.

[0010] The actuator according to an embodiment of the present invention has at least the following advantageous effects: the translational actuation structure is disposed on the rotational actuation structure, and the rotational actuation structure can drive the translational actuation structure to rotate. The movable baseplate is movably disposed on a side of the translational actuation structure away from the rotational actuation structure, and the translational actuation structure can drive the movable baseplate to translate. Because the movable baseplate is sequentially stacked on the translational actuation structure and the rotational actuation structure, the movable baseplate can achieve both translational and rotational motion. When the lens unit is assembled to the actuator, specifically to the movable baseplate, rotation and translation of the lens unit can be achieved using a single actuator.

[0011] According to some embodiments of the present invention, a substrate, a power supply circuit is provided on an end surface of the substrate;

[0012] a rotating plate, the rotating plate being movably disposed on the same end surface of the substrate and the power supply circuit;

[0013] A first SMA wire, one end of the first SMA wire is connected to the rotating plate, and the other end of the first SMA wire is connected to the first output port corresponding to the power supply circuit. The first SMA wire is used to contract when energized to drive the rotating plate to rotate relative to the substrate. At least two sliding members are also provided between the rotating plate and the substrate.

[0014] According to some embodiments of the present invention, the rotating plate is configured as a square plate, and a first connecting portion is provided at a first end foot of the square plate, one end of the first SMA wire is connected to the first connecting portion, and the other end of the first SMA wire is connected to a first output port corresponding to the power supply circuit; the rotary actuating structure also includes a second SMA wire, and a second connecting portion is provided at a second end foot of the square plate diagonally opposite to the end foot where the first connecting portion is located, one end of the second SMA wire is connected to the second connecting portion, and the other end of the second SMA wire is connected to a second output port corresponding to the power supply circuit; the first SMA wire is arranged parallel to the first side edge adjacent to the square plate, and the second SMA wire is arranged near the second side edge of the square plate opposite to the first SMA wire, and the second SMA wire is arranged parallel to the second side edge adjacent to the square plate.

[0015] According to some embodiments of the present invention, the rotary actuating structure also includes a third SMA wire, a third connecting portion is further provided at the first end foot of the square plate, one end of the third SMA wire is connected to the third connecting portion, and the other end of the third SMA wire is connected to the third output port corresponding to the power supply circuit, and the third SMA wire is arranged parallel to the third side adjacent to the square plate, and the third side and the first side are adjacent sides; the rotary actuating structure also includes a fourth SMA wire, a fourth connecting portion is further provided at the second end foot of the square plate, one end of the fourth SMA wire is connected to the fourth connecting portion, and the other end of the fourth SMA wire is connected to the fourth output port corresponding to the power supply circuit, the fourth SMA wire is arranged parallel to the fourth side adjacent to the square plate, and the fourth side and the second side are adjacent sides.

[0016] According to some embodiments of the present invention, the translation actuation structure comprises:

[0017] A conductive plate, wherein the conductive plate is arranged on the rotating plate, and the movable substrate is arranged on the conductive plate;

[0018] A swing arm structure, wherein the swing arm structure is arranged on one side of the conductive plate, and the swing arm structure includes two elastic swing arms and a fifth SMA wire, wherein one end of one of the elastic swing arms is connected to the ground end on the conductive plate, and the other end of one of the elastic swing arms is connected to one end of the fifth SMA wire; one end of the other elastic swing arm is connected to the power supply end on the conductive plate, and the other end of the other elastic swing arm is connected to the other end of the fifth SMA wire; the connection ends of the two elastic swing arms connected to the fifth SMA wire are also respectively connected to one side of the movable base plate; the fifth SMA wire is used to be energized and contracted to drive the two elastic swing arms to swing so as to push the movable base plate to move in a horizontal direction.

[0019] According to some embodiments of the present invention, the two elastic swing arms and the fifth SMA wire are arranged in a triangular structure.

[0020] According to some embodiments of the present invention, four groups of swing arm structures are provided, and the four groups of swing arm structures are respectively provided on four sides of the end surface of the conductive plate, and the four groups of swing arm structures are respectively used to drive the movable substrate to move in four directions.

[0021] According to some embodiments of the present invention, a plurality of sliding bearings are provided between the movable base plate and the conductive plate.

[0022] According to some embodiments of the present invention, the actuator further includes at least two magnetic members, at least two of which are distributed on the end surface of the movable substrate away from the conductive plate, and the magnetic members are used to generate magnetic attraction force with the conductive plate to press the movable substrate onto the conductive plate.

[0023] According to an embodiment of the second aspect of the present invention, the present invention includes the above-mentioned actuator and a lens unit, wherein the lens unit is arranged on the actuator, and the actuator is used to drive the lens unit to rotate or translate.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0026] Figure 1 is an exploded schematic diagram of an actuator according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a substrate according to an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of a rotary actuation structure according to an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the assembly of a rotary actuating structure and an elastic connecting member according to an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a translation actuation structure according to an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of a swing arm structure according to an embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of an actuator according to an embodiment of the present invention;

[0033] Figure 8 FIG. 4 is a schematic diagram of a camera module according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] Rotary actuation structure 100, substrate 110, power supply circuit 111, first output port 1111, second output port 1112, third output port 1113, fourth output port 1114, square plate 120, first end pin 121, first connection portion 1211, third connection portion 1212, second end pin 122, second connection portion 1221, fourth connection portion 1222, first SMA wire 130, second SMA wire 140, third SMA wire 150, fourth SMA wire 160,

[0036] Translation actuation structure 200, conductive plate 210, swing arm structure 220, elastic swing arm 230, fifth SMA wire 240,

[0037] Active substrate 300,

[0038] Sliding bearing 400,

[0039] Magnetic parts 500,

[0040] Lens unit 600,

[0041] Elastic connecting member 700. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0043] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0044] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0045] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting 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.

[0046] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In a first aspect, an embodiment of the present invention proposes an actuator, comprising: a rotational actuating structure 100; a translational actuating structure 200, wherein the translational actuating structure 200 is arranged on the rotational actuating structure 100; and a movable substrate 300, wherein the movable substrate 300 is movably arranged on a side of the translational actuating structure 200 away from the rotational actuating structure 100; the rotational actuating structure 100 is used to drive the translational actuating structure 200 and the movable substrate 300 to rotate, and the translational actuating structure 200 is used to drive the movable substrate 300 to move in a horizontal direction.

[0047] With the actuator of the embodiment of the present invention, the translational actuation structure 200 is disposed on the rotational actuation structure 100, and the rotational actuation structure 100 can drive the translational actuation structure 200 to rotate. The movable base plate 300 is movably disposed on the side of the translational actuation structure 200 away from the rotational actuation structure 100, and the translational actuation structure 200 can drive the movable base plate 300 to translate. Because the movable base plate 300 is sequentially stacked on the translational actuation structure 200 and the rotational actuation structure 100, the movable base plate 300 can achieve both translational and rotational motion. When the lens unit 600 is assembled to the actuator, specifically to the movable base plate 300, rotation and translation of the lens unit 600 can be achieved using only one actuator.

[0048] In some specific embodiments of the present invention, the rotary actuation structure 100 includes: a substrate 110, a power supply circuit 111 is provided on the end surface of the substrate 110; a rotating plate, the rotating plate is movably provided on the same end surface of the substrate 110 as the power supply circuit 111; a first SMA wire 130, one end of the first SMA wire 130 is connected to the rotating plate, and the other end of the first SMA wire 130 is connected to the first output port 1111 corresponding to the power supply circuit 111, the first SMA wire 130 is used to contract when energized to drive the rotating plate to rotate relative to the substrate 110, and at least two sliding members are also provided between the rotating plate and the substrate 110. The rotating plate is configured as a square plate 120. A first connecting portion 1211 is provided at a first end leg 121 of the square plate 120. One end of a first SMA wire 130 is connected to the first connecting portion 1211, and the other end of the first SMA wire 130 is connected to a first output port 1111 corresponding to the power supply circuit 111. The rotary actuating structure 100 further includes a second SMA wire 140. A second connecting portion 1221 is provided at a second end leg 122 of the square plate 120, diagonally opposite to the end leg where the first connecting portion 1211 is located. One end of the second SMA wire 140 is connected to the second connecting portion 1221, and the other end of the second SMA wire 140 is connected to a second output port 1112 corresponding to the power supply circuit 111. The first SMA wire 130 is arranged parallel to a first side edge adjacent to the square plate 120. The second SMA wire 140 is arranged adjacent to a second side edge of the square plate 120 opposite to the first SMA wire 130. The second SMA wire 140 is arranged parallel to the second side edge adjacent to the square plate 120.

[0049] As can be understood, a power supply circuit 111 is disposed on an end surface of the substrate 110, and a rotating plate is movably disposed on the same end surface of the substrate 110 as the power supply circuit 111. One end of a first SMA wire 130 is connected to the rotating plate, while the other end of the first SMA wire 130 is connected to a first output port 1111 corresponding to the power supply circuit 111. Since the rotating plate is movably disposed between the substrate 110 and the substrate 110, it can be understood that the rotating plate is rotatable about the substrate 110. When energized, the first SMA wire 130 contracts, driving the rotating plate to rotate relative to the substrate 110. Because the rotating plate is driven by an SMA wire, the contraction distance of the SMA wire can be controlled by controlling the current applied, making it easier to control the rotational distance of the rotating plate compared to current technology. The first SMA wire 130 can drive the rotating plate to rotate in a certain direction, and combined with the force of the second SMA wire 140, the rotating plate can rotate more stably in that direction. At least two sliding members, or four sliding members, are evenly distributed between the rotating plate and the base plate 110 to make the rotating plate rotate more smoothly.

[0050] In some specific embodiments of the present invention, the rotary actuating structure 100 also includes a third SMA wire 150, and a third connecting portion 1212 is further provided at the first end foot 121 of the square plate 120. One end of the third SMA wire 150 is connected to the third connecting portion 1212, and the other end of the third SMA wire 150 is connected to the third output port 1113 corresponding to the power supply circuit 111. The third SMA wire 150 is arranged parallel to the third side adjacent to the square plate 120, and the third side is adjacent to the first side. The rotary actuating structure 100 also includes a fourth SMA wire 160, and a fourth connecting portion 1222 is further provided at the second end foot 122 of the square plate 120. One end of the fourth SMA wire 160 is connected to the fourth connecting portion 1222, and the other end of the fourth SMA wire 160 is connected to the fourth output port 1114 corresponding to the power supply circuit 111. The fourth SMA wire 160 is arranged parallel to the fourth side adjacent to the square plate 120, and the fourth side is adjacent to the second side.

[0051] It is understood that the third SMA wire 150 can drive the rotating plate to rotate in another direction, which is opposite to the direction driven by the first SMA wire 130 and the second SMA wire 140. If the direction driven by the first SMA wire 130 and the second SMA wire 140 is clockwise, the direction driven by the third SMA wire 150 is counterclockwise. The mutual cooperation between the third SMA wire 150 and the fourth SMA wire 160 can make the rotating plate rotate more smoothly in this rotation direction. It is understood that the rotating plate can also rotate around the connection end between the elastic connector 700 and the base plate 110. Because the elastic connector 700 is elastic, it can also be used as an elastic reset member after the rotating plate rotates.

[0052] In some specific embodiments of the present invention, the rotary actuation structure 100 further includes a plurality of elastic connectors 700700. One end of each of the elastic connectors 700700 is connected to the substrate 110110 or to corresponding ports of the power supply circuit 111110, and the other end of each of the elastic connectors 700700 is connected to the rotating plate. This arrangement allows the rotating plate to rotate about the connection between the elastic connectors 700700 and the substrate 110110. Furthermore, because the elastic connectors 700700 are elastic, they can also serve as elastic return elements after the rotating plate rotates. Alternatively, the rotating plate can rotate about its own center.

[0053] In some specific embodiments of the present invention, the translational actuation structure 200 includes: a conductive plate 210, wherein the conductive plate 210 is disposed on a rotating plate, and a movable base plate 300 is disposed on the conductive plate 210; a swing arm structure 220, wherein the swing arm structure 220 is disposed on one side of the conductive plate 210, and the swing arm structure 220 includes two elastic swing arms 230 and a fifth SMA wire 240, wherein one end of one elastic swing arm 230 is connected to a ground terminal on the conductive plate 210, and the other end of one elastic swing arm 230 is connected to one end of the fifth SMA wire 240; one end of the other elastic swing arm 230 is connected to a power supply terminal on the conductive plate 210, and the other end of the other elastic swing arm 230 is connected to the other end of the fifth SMA wire 240; the connection ends of the two elastic swing arms 230 connected to the fifth SMA wire 240 are also respectively connected to one side of the movable base plate 300; the fifth SMA wire 240 is used to contract when energized to drive the two elastic swing arms 230 to swing, thereby pushing the movable base plate 300 to move in a horizontal direction. The two elastic swing arms 230 and the fifth SMA wire 240 are arranged in a triangle structure.

[0054] Four sets of swing arm structures 220 are provided, one on each side of the end surface of the conductive plate 210, and are used to drive the movable base plate 300 in four directions. Multiple sliding bearings 400 are provided between the movable base plate 300 and the conductive plate 210. The actuator also includes at least two magnetic members 500, distributed on the end surface of the movable base plate 300 facing away from the conductive plate 210. The magnetic members 500 are used to generate a magnetic attraction with the conductive plate 210, thereby pressing the movable base plate 300 against the conductive plate 210.

[0055] It is understood that the four groups of swing arm structures 220 can be evenly distributed on the conductive plate 210, with the four groups of swing arm structures 220 being perpendicular to each other. The connection ends of the elastic swing arm 230 of each group of swing arm structures 220 connected to the fifth SMA wire 240 are also respectively connected to one side of the movable base plate 300. By energizing the different groups of swing arm structures 220, the movable base plate 300 can be translated in the four directions of front, back, left, and right. A plurality of sliding bearings 400 are provided between the movable base plate 300 and the conductive plate 210 to facilitate smooth sliding between the movable base plate 300 and the conductive plate 210. The power supply end on the conductive plate 210 can be a conductive unit responsible for power supply, and the grounding end on the conductive plate 210 can be a conductive unit for grounding.

[0056] Reference Figure 8 The embodiment of the second aspect of the present invention further proposes a camera module, comprising the above-mentioned actuator and a lens unit 600, wherein the lens unit 600 is arranged on the actuator, and the actuator is used to drive the lens unit 600 to rotate or translate.

[0057] Reference below Figures 1 to 8 The actuator according to the embodiment of the present invention is described in detail with reference to a specific embodiment. It should be understood that the following description is only for illustrative purposes and is not intended to limit the present invention.

[0058] An embodiment of the present invention discloses an actuator, comprising: a rotary actuating structure 100; a translational actuating structure 200, wherein the translational actuating structure 200 is arranged on the rotary actuating structure 100; and a movable substrate 300, wherein the movable substrate 300 is movably arranged on a side of the translational actuating structure 200 away from the rotary actuating structure 100; the rotary actuating structure 100 is used to drive the translational actuating structure 200 and the movable substrate 300 to rotate, and the translational actuating structure 200 is used to drive the movable substrate 300 to move in a horizontal direction.

[0059] The rotary actuation structure 100 includes: a substrate 110, on the end surface of which a power supply circuit 111 is provided; a rotating plate, which is movably provided on the same end surface of the substrate 110 as the power supply circuit 111; a first SMA wire 130, one end of which is connected to the rotating plate, and the other end of which is connected to a first output port 1111 corresponding to the power supply circuit 111. The first SMA wire 130 is configured to contract when energized to drive the rotating plate to rotate relative to the substrate 110. At least two sliding members are also provided between the rotating plate and the substrate 110. The rotating plate is configured as a square plate 120. A first connecting portion 1211 is provided at a first end leg 121 of the square plate 120. One end of a first SMA wire 130 is connected to the first connecting portion 1211, and the other end of the first SMA wire 130 is connected to a first output port 1111 corresponding to the power supply circuit 111. The rotary actuating structure 100 further includes a second SMA wire 140. A second connecting portion 1221 is provided at a second end leg 122 of the square plate 120, diagonally opposite to the end leg where the first connecting portion 1211 is located. One end of the second SMA wire 140 is connected to the second connecting portion 1221, and the other end of the second SMA wire 140 is connected to a second output port 1112 corresponding to the power supply circuit 111. The first SMA wire 130 is arranged parallel to a first side edge adjacent to the square plate 120. The second SMA wire 140 is arranged adjacent to a second side edge of the square plate 120 opposite to the first SMA wire 130. The second SMA wire 140 is arranged parallel to the second side edge adjacent to the square plate 120.

[0060] The rotary actuation structure 100 also includes a third SMA wire 150. A third connection portion 1212 is further provided at the first end leg 121 of the square plate 120. One end of the third SMA wire 150 is connected to the third connection portion 1212, and the other end of the third SMA wire 150 is connected to the third output port 1113 corresponding to the power supply circuit 111. The third SMA wire 150 is arranged parallel to the third side adjacent to the square plate 120, and the third side is adjacent to the first side. The rotary actuation structure 100 also includes a fourth SMA wire 160. A fourth connection portion 1222 is further provided at the second end leg 122 of the square plate 120. One end of the fourth SMA wire 160 is connected to the fourth connection portion 1222, and the other end of the fourth SMA wire 160 is connected to the fourth output port 1114 corresponding to the power supply circuit 111. The fourth SMA wire 160 is arranged parallel to the fourth side adjacent to the square plate 120, and the fourth side is adjacent to the second side.

[0061] The translational actuation structure 200 includes: a conductive plate 210, which is arranged on a rotating plate, and a movable base plate 300 is arranged on the conductive plate 210; a swing arm structure 220, which is arranged on one side of the conductive plate 210, and includes two elastic swing arms 230 and a fifth SMA wire 240, wherein one end of one elastic swing arm 230 is connected to the ground terminal on the conductive plate 210, and the other end of one elastic swing arm 230 is connected to one end of the fifth SMA wire 240; one end of the other elastic swing arm 230 is connected to the power supply terminal on the conductive plate 210, and the other end of the other elastic swing arm 230 is connected to the other end of the fifth SMA wire 240; the connection ends of the two elastic swing arms 230 connected to the fifth SMA wire 240 are also respectively connected to one side of the movable base plate 300; the fifth SMA wire 240 is used to contract when energized to drive the two elastic swing arms 230 to swing, thereby pushing the movable base plate 300 to move in a horizontal direction. The two elastic swing arms 230 and the fifth SMA wire 240 are arranged in a triangular structure. There are four sets of swing arm structures 220, which are respectively arranged on four sides of the end surface of the conductive plate 210 and are used to drive the movable base 300 to move in four directions.

[0062] A plurality of sliding bearings 400 are disposed between the movable base plate 300 and the conductive plate 210. The actuator further includes at least two magnetic members 500, which are distributed on the end surface of the movable base plate 300 away from the conductive plate 210. The magnetic members 500 are configured to generate a magnetic attraction force with the conductive plate 210 to press the movable base plate 300 against the conductive plate 210.

[0063] According to the actuator of the embodiment of the present invention, through such a configuration, at least some of the following effects can be achieved: the translational actuation structure 200 is disposed on the rotational actuation structure 100, and the rotational actuation structure 100 can drive the translational actuation structure 200 to rotate. The movable base plate 300 is movably disposed on a side of the translational actuation structure 200 away from the rotational actuation structure 100, and the translational actuation structure 200 can drive the movable base plate 300 to translate. Because the movable base plate 300 is sequentially stacked on the translational actuation structure 200 and the rotational actuation structure 100, the movable base plate 300 can achieve both translational and rotational motion. When the lens unit 600 is assembled to the actuator, specifically to the movable base plate 300, rotation and translation of the lens unit 600 can be achieved using only one actuator.

[0064] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. An actuator, characterized in that: include: A rotary actuation structure; the rotary actuation structure comprises a substrate, a rotating plate and a first SMA wire, and a power supply circuit is provided on the end surface of the substrate; The rotating plate can be movably arranged on the same end surface of the substrate and the power supply circuit; one end of the first SMA wire is connected to the rotating plate, and the other end of the first SMA wire is connected to the first output port corresponding to the power supply circuit. The first SMA wire is used to contract when energized to drive the rotating plate to rotate relative to the substrate. At least two sliding members are also provided between the rotating plate and the substrate. A translation actuation structure, wherein the translation actuation structure is arranged on the rotation actuation structure; the translation actuation structure includes a conductive plate and a swing arm structure, the conductive plate is arranged on the rotating plate, and the movable base plate is arranged on the conductive plate; the swing arm structure is arranged on one side of the conductive plate, and the swing arm structure includes two elastic swing arms and a fifth SMA wire, wherein one end of one of the elastic swing arms is connected to the ground end on the conductive plate, and the other end of one of the elastic swing arms is connected to one end of the fifth SMA wire; one end of the other elastic swing arm is connected to the power supply end on the conductive plate, and the other end of the other elastic swing arm is connected to the other end of the fifth SMA wire; the connection ends of the two elastic swing arms connected to the fifth SMA wire are also respectively connected to one side of the movable base plate; the fifth SMA wire is used to be energized and contracted to drive the two elastic swing arms to swing so as to push the movable base plate to move in a horizontal direction; a movable base plate, the movable base plate being movably disposed on a side of the translation actuation structure away from the rotation actuation structure; The rotation actuation structure is used to drive the translation actuation structure and the movable base plate to rotate, and the translation actuation structure is used to drive the movable base plate to move in a horizontal direction; An elastic connector, one end of which is connected to the substrate or to a corresponding port of the power supply circuit, and the other end of which is connected to the rotating plate.

2. The actuator according to claim 1, wherein: The rotating plate is configured as a square plate, and a first connecting portion is provided at a first end foot of the square plate, one end of the first SMA wire is connected to the first connecting portion, and the other end of the first SMA wire is connected to a first output port corresponding to the power supply circuit; the rotary actuating structure also includes a second SMA wire, and a second connecting portion is provided at a second end foot of the square plate diagonally opposite to the end foot where the first connecting portion is located, one end of the second SMA wire is connected to the second connecting portion, and the other end of the second SMA wire is connected to a second output port corresponding to the power supply circuit; the first SMA wire is arranged parallel to a first side edge adjacent to the square plate, and the second SMA wire is arranged near a second side edge of the square plate opposite to the first SMA wire, and the second SMA wire is arranged parallel to the second side edge adjacent to the square plate.

3. The actuator according to claim 2, wherein: The rotary actuation structure also includes a third SMA wire. A third connection portion is further provided at the first end foot of the square plate. One end of the third SMA wire is connected to the third connection portion, and the other end of the third SMA wire is connected to the third output port corresponding to the power supply circuit. The third SMA wire is arranged parallel to the third side edge adjacent to the square plate, and the third side edge is adjacent to the first side edge. The rotary actuation structure also includes a fourth SMA wire. A fourth connection portion is further provided at the second end foot of the square plate. One end of the fourth SMA wire is connected to the fourth connection portion, and the other end of the fourth SMA wire is connected to the fourth output port corresponding to the power supply circuit. The fourth SMA wire is arranged parallel to the fourth side edge adjacent to the square plate, and the fourth side edge is adjacent to the second side edge.

4. The actuator according to claim 1, wherein: The two elastic swing arms and the fifth SMA wire are arranged in a triangle structure.

5. The actuator according to claim 4, characterized in that: There are four groups of swing arm structures, which are respectively arranged on four sides of the end surface of the conductive plate. The four groups of swing arm structures are respectively used to drive the movable base plate to move in four directions.

6. The actuator according to claim 1, wherein: A plurality of sliding bearings are arranged between the movable base plate and the conductive plate.

7. The actuator according to claim 6, characterized in that: The actuator further includes at least two magnetic members, which are distributed on the end surface of the movable substrate away from the conductive plate. The magnetic members are used to generate magnetic attraction with the conductive plate to press the movable substrate onto the conductive plate.

8. A camera module, characterized in that: The invention comprises the actuator and the lens unit according to any one of claims 1 to 7, wherein the lens unit is arranged on the actuator, and the actuator is used to drive the lens unit to rotate or translate.

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