CN111103670A

CN111103670A - Actuator having auto-focusing function and optical image stabilizing function

Info

Publication number: CN111103670A
Application number: CN202010019541.4A
Authority: CN
Inventors: 余林涛; 张志伟
Original assignee: Ruien Photoelectric Co Ltd
Current assignee: Ruien Photoelectric Co Ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-05-05
Anticipated expiration: 2040-01-08
Also published as: CN111103670B

Abstract

The present invention provides an actuator having an auto-focusing function and an optical image stabilizing function, comprising: the optical anti-shake module comprises a first base, a second base and a shape memory alloy wire, wherein a first fixing part is arranged on the first base, a second fixing part is arranged on the second base, a first end of the shape memory alloy wire is fixedly connected with the first fixing part, and a second end of the shape memory alloy wire is fixedly connected with the second fixing part; the automatic focusing module is arranged on the second base; when the shape memory alloy wire is electrified, the second base moves in the horizontal direction perpendicular to the optical axis direction of the actuator, and the second base drives the automatic focusing module to move in the horizontal direction.

Description

Actuator having auto-focusing function and optical image stabilizing function

Technical Field

The invention belongs to the technical field of actuators, and particularly relates to an actuator with an automatic focusing function and an optical image stabilizing function.

Background

In general, as the definition and magnification of an image captured by a device having a camera function such as a camera or a mobile phone are improved, an OIS (Optical image stabilization) function for correcting camera shake and vibration of the device having a camera function such as a camera or a mobile phone at telephoto time requires a more complicated camera shake and vibration tracking capability.

On the other hand, an AF + OIS actuator combining two actuators of OIS and AF (Auto Focus) has a complicated structure and a large number of parts, and if the OIS and AF units are integrated, the yield of good products is increased and the manufacturing cost is increased.

Disclosure of Invention

To solve at least one of the above technical problems, the present invention provides an actuator having an auto-focus function and an optical image stabilization function. According to the actuator having the auto-focusing function and the optical image stabilizing function of the present invention, the structure of the actuator can be effectively simplified, and a stable optical anti-shake function and auto-focusing function can be realized.

The actuator with the automatic focusing function and the optical image stabilizing function is realized by the following technical scheme.

The actuator having an auto-focusing function and an optical image stabilizing function of the present invention includes: the optical anti-shake module comprises a first base, a second base and a shape memory alloy wire, wherein a first fixing part is arranged on the first base, a second fixing part is arranged on the second base, a first end of the shape memory alloy wire is fixedly connected with the first fixing part, and a second end of the shape memory alloy wire is fixedly connected with the second fixing part; the automatic focusing module is arranged on the second base; when the shape memory alloy wire is electrified, the second base moves in the horizontal direction perpendicular to the optical axis direction of the actuator, and the second base drives the automatic focusing module to move in the horizontal direction.

According to the actuator having an auto-focusing function and an optical image stabilizing function according to at least one embodiment of the present invention, a first base has one bottom wall and four side walls forming a space for accommodating a second base; the second base also has a bottom wall and four side walls forming a space for accommodating the autofocus module.

According to the actuator having the auto-focusing function and the optical image stabilizing function according to at least one embodiment of the present invention, the number of the shape memory alloy wires is eight, the number of the first fixing portions is four, and the number of the second fixing portions is eight; the four first fixing parts are respectively arranged at four corners of the first base; the four outer side surfaces of the second base are respectively provided with two second fixing parts, the two second fixing parts on each outer side surface of the second base are respectively arranged at two edge positions of the outer side surface, the two second fixing parts have different extension sizes vertical to the outer side surface, the two edge positions are respectively close to two corner parts of the second base, and the two second fixing parts on each outer side surface are arranged in a non-staggered manner along the optical axis direction; two strip-shaped memory alloy wires are arranged between each outer side face of the second base and the opposite inner side face of the first base, the first end of each shape memory alloy wire is connected with a first fixing portion, each first fixing portion is connected with the first ends of the two strip-shaped memory alloy wires, the second end of each shape memory alloy wire is fixedly connected with a second fixing portion, and the two strip-shaped memory alloy wires arranged between each outer side face of the second base and the opposite inner side face of the first base are arranged in a non-staggered mode along the optical axis direction.

According to the actuator having the auto-focusing function and the optical image stabilizing function according to at least one embodiment of the present invention, the number of the shape memory alloy wires is eight, the number of the first fixing portions is four, and the number of the second fixing portions is eight; the four first fixing parts are respectively arranged at four corners of the first base; the four outer side surfaces of the second base are respectively provided with two second fixing parts, the two second fixing parts on each outer side surface of the second base are respectively arranged at two edge positions of the outer side surface, the two second fixing parts have the same extension size vertical to the outer side surface, the two edge positions are respectively close to two corner parts of the second base, and the two second fixing parts on each outer side surface are arranged in a staggered mode along the optical axis direction; two strip-shaped memory alloy wires are arranged between each outer side face of the second base and the opposite inner side face of the first base, the first end of each shape memory alloy wire is connected with a first fixing portion, each first fixing portion is connected with the first ends of the two strip-shaped memory alloy wires, the second end of each shape memory alloy wire is fixedly connected with a second fixing portion, and the two strip-shaped memory alloy wires arranged between each outer side face of the second base and the opposite inner side face of the first base are arranged in a staggered mode along the optical axis direction.

The actuator having an auto-focus function and an optical image stabilization function according to at least one embodiment of the present invention further includes a guide ball disposed between the bottom wall of the second base and the bottom wall of the first base for guiding movement of the second base with respect to the first base.

According to the actuator having the auto-focus function and the optical image stabilization function according to at least one embodiment of the present invention, the number of the guide balls is three, two of the guide balls are respectively disposed at two adjacent corners of the second base, and the third guide ball is disposed at a middle position of the bottom side which is not adjacent to each of the two adjacent corners.

According to the actuator having the auto-focus function and the optical image stabilization function according to at least one embodiment of the present invention, the first fixing portion is a cylinder extending from a bottom wall of the first base in the optical axis direction, and the second fixing portion is a convex portion extending outward from a side wall of the second base.

According to the actuator having the auto-focus function and the optical image stabilization function of at least one embodiment of the present invention, the first fixing portion extends no longer than the length of the side wall of the first base in the optical axis direction.

According to an actuator having an auto-focus function and an optical image stabilization function according to at least one embodiment of the present invention, an auto-focus module includes: a lens support part for supporting at least one lens and moving in an optical axis direction of the lens to perform focusing; the driving device is used for enabling the lens supporting part to move to the focal position of the lens in the optical axis direction; a guide ball guiding movement of the lens support part; and a frame for supporting the lens support part, the two sets of driving devices and the guide balls.

According to the actuator having the auto-focusing function and the optical image stabilizing function according to at least one embodiment of the present invention, the permanent magnets are disposed on the two adjacent outer surfaces of the lens support portion, respectively, and the magnetic circuits each including the coil and the magnetic plate are disposed at positions facing the permanent magnets on the two adjacent inner surfaces of the housing, respectively.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is one of cross-sectional views of an optical anti-shake module having an actuator for an auto-focus function and an optical image stabilization function according to an embodiment of the present invention.

Fig. 2 is one of cross-sectional views of an autofocus module having an actuator with autofocus functions and optical image stabilization functions according to an embodiment of the present invention.

Fig. 3 is a second cross-sectional view of an autofocus module having an actuator with autofocus functions and optical image stabilization functions according to an embodiment of the present invention.

Fig. 4 is a second cross-sectional view of an optical anti-shake module having an actuator for an auto-focus function and an optical image stabilization function according to an embodiment of the present invention.

Fig. 5 is a sectional view of an actuator having an auto-focus function and an optical image stabilization function according to an embodiment of the present invention.

Fig. 6 is one of control diagrams of an optical anti-shake module having an actuator for an auto-focus function and an optical image stabilization function according to an embodiment of the present invention.

Fig. 7 is a second control diagram of the optical anti-shake module having the actuator with the auto-focus function and the optical image stabilization function according to the embodiment of the present invention.

Description of the reference numerals

Actuator with autofocus function and optical image stabilization function

10 optical anti-shake module

101 first base

102 second base

103 guide ball

104 second fixed part

1041 one of the second fixing parts

1042 second fixed part

105 first fixing part

1051 one of the first fixing parts

1052 second of the first fixing part

1053 the third of the first fixed part

1054 fourth of the first fixing part

106 shape memory alloy wire

1061 one of the shape memory alloy wires

1062 shape memory alloy wire II

107 first hollow part

20 automatic focusing module

201 frame body

202 lens support

203 second hollow part

204 magnetic plate

205 flexible circuit board

206 coil

207 guide ball

2071 first set of guide balls

2072 second set of guide balls

208 a permanent magnet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The technical solution of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples will be understood as providing exemplary features of various details of some ways in which the technical concepts of the present invention may be practiced. Therefore, unless otherwise specified, the features of the various embodiments/examples may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present invention.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the invention may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., as in "side wall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 and 5, fig. 1 and 5 are views in the optical axis direction, which is perpendicular to the paper. An actuator 1 having an auto-focus function and an optical image stabilization function according to an embodiment of the present invention includes: the optical anti-shake module 10 includes a first base 101, a second base 102 and a shape memory alloy wire 106 (i.e. SMA wire), the first base 101 is provided with a first fixing portion 105, the second base 102 is provided with a second fixing portion 104, a first end of the shape memory alloy wire 106 is fixedly connected with the first fixing portion 105, and a second end of the shape memory alloy wire 106 is fixedly connected with the second fixing portion 104; and the automatic focusing module 20, the automatic focusing module 20 is disposed on the second base 102, when the shape memory alloy wire 106 is energized, the second base 102 moves in the horizontal direction perpendicular to the optical axis direction of the actuator, and the second base 102 drives the automatic focusing module 20 to move in the horizontal direction.

As can be seen from fig. 1, the first base 101 has four corners and the second base 102 has four corners. The first base 101 and the second base 102 have matching shapes, each being square in shape.

Preferably, the first base 101 and the second base 102 of the optical anti-shake module 10 are each preferably provided with a first hollow portion 107 at a middle position, and the first hollow portion 107 can allow the lens to pass through.

Fig. 4 is a second cross-sectional view of an optical anti-shake module having an actuator for an auto-focus function and an optical image stabilization function according to an embodiment of the present invention. Fig. 4 is a side view of the optical anti-shake module shown in fig. 1.

With reference to fig. 1 and 4, preferably, the first base 101 has a bottom wall and four side walls forming a space for accommodating the second base 102; second base 102 also has a bottom wall and four side walls that form a space (e.g., a half enclosed space formed by dashed lines in fig. 4) for accommodating autofocus module 20. The first fixing portion 105 of the first base 101 is located between the inner side of the sidewall of the first base 101 and the outer side of the sidewall of the second base 102.

In conjunction with fig. 1, 4 and 5, the actuator 1 having the auto-focus function and the optical image stabilization function preferably further includes a guide ball 103, the guide ball 103 being disposed between a bottom wall of the second base 102 and a bottom wall of the first base 101 for guiding movement of the second base 102 relative to the first base 101. By guiding the rolling of the ball 103, the second base 102 can be smoothly moved relative to the first base 101 by the shape memory alloy wire 106.

Preferably, the number of the guide balls 103 is three, wherein two guide balls 103 are respectively disposed at two adjacent corners of the second base 102, and the third guide ball 103 is disposed at a middle position of a bottom side which is not adjacent to both of the two adjacent corners.

As shown in fig. 1 and 4, preferably, the first fixing portion 105 provided on the first base 101 is a cylinder extending from a bottom wall of the first base 101 in the optical axis direction, and the second fixing portion 104 provided on the second base 102 is a convex portion extending outward from a side wall of the second base 102.

Preferably, as shown in fig. 4, the first fixing portion 105 extends no longer than the length of the side wall of the first base 101 in the optical axis direction. The extension length of the first fixing portion 105 is smaller than the length of the side wall of the first base 101 in the optical axis direction, and the extension length of the first fixing portion 105 is also smaller than the length of the side wall of the second base 102 in the optical axis direction. More preferably, the length of the side wall of the first base 101 in the optical axis direction is the same as the length of the side wall of the second base 102 in the optical axis direction.

An actuator having an auto-focus function and an optical image stabilization function according to a preferred embodiment of the present invention, with reference to fig. 1, 4, and 5, the number of shape memory alloy wires 106 of the actuator 1 having an auto-focus function and an optical image stabilization function is eight, the number of first fixing portions 105 is four, and the number of second fixing portions 104 is eight; four first fixing parts 105 are respectively provided at four corners of the first base 101; the four outer side surfaces of the second base 102 are respectively provided with two second fixing parts 104, the two second fixing parts 104 on each outer side surface of the second base 102 are respectively arranged at two edge positions of the outer side surface, the two second fixing parts 104 have different extension sizes perpendicular to the outer side surface, the two edge positions are respectively close to two corner parts of the second base 102, and the two second fixing parts 104 on each outer side surface are arranged in a non-staggered manner along the optical axis direction; two strip-shaped memory alloy wires 106 are arranged between each outer side surface of the second base 102 and the opposite inner side surface of the first base 101, a first end of each shape memory alloy wire 106 is connected with a first fixing portion 105, each first fixing portion 105 is connected with the first ends of the two strip-shaped memory alloy wires 106, a second end of each shape memory alloy wire 106 is fixedly connected with a second fixing portion 104, and the two strip-shaped memory alloy wires 106 arranged between each outer side surface of the second base 102 and the opposite inner side surface of the first base 101 are arranged in a non-staggered mode along the optical axis direction.

As shown in fig. 1, four

first fixing portions

1051, 1052, 1053, 1054 are provided in this order in the counterclockwise direction and at four corners of the first base 101, respectively, and in the direction perpendicular to the side wall surface of the first base 101, the first fixing portion 1051 is provided so as to be offset from the first fixing portion 1052, the first fixing portion 1052 is provided so as to be offset from the first fixing portion 1053, the first fixing portion 1053 is provided so as to be offset from the first fixing portion 1054, and the first fixing portion 1054 is provided so as to be offset from the first fixing portion 1051.

The

first fixing portions

1051 and 1053 are spaced apart from the optical axis by a first distance, the first fixing portions 1052 and 1054 are spaced apart from the optical axis by a second distance, and the first distance is greater than the second distance.

Taking the right portion of fig. 1 as an example, the two

second fixing portions

1041, 1042 between the first fixing portion 1051 and the first fixing portion 1052 have different extending sizes perpendicular to the outer side surface of the second base 102, the second fixing portion 1041 has a first extending size, the second fixing portion 1042 has a second extending size, and the first extending size is smaller than the second extending size.

The shape memory alloy wire 1061 is connected to the first fixing portion 1051 at a first end, connected to the second fixing portion 1042 at a second end, and the shape memory alloy wire 1062 is connected to the first fixing portion 1052 at a first end and connected to the second fixing portion 1041 through the second fixing portion 1042.

The first fixing portion 1051 is adjacent to the second fixing portion 1041, and the first fixing portion 1052 is adjacent to the second fixing portion 1042.

The left part, the upper part and the lower part of fig. 1 are provided with a first fixing part, a second fixing part and a shape memory alloy wire which are similar to the right part of fig. 1, and the description is omitted.

As an alternative preferred embodiment, the number of the shape memory alloy wires 106 is four, and the two strip-shaped shape memory alloy wires 106 connected to each of the first fixing portions 105 described above are replaced with one shape memory alloy wire (i.e., an embodiment of four shape memory alloy wires is shown in fig. 1).

According to the actuator having the auto-focus function and the optical image stabilization function according to still another preferred embodiment of the present invention, the number of the shape memory alloy wires 106 is eight, the number of the first fixing portions 105 is four, and the number of the second fixing portions 104 is eight; four first fixing parts 105 are respectively provided at four corners of the first base 101; two second fixing portions 104 are respectively arranged on four outer side surfaces of the second base 102, two second fixing portions 104 on each outer side surface of the second base 102 are respectively arranged at two edge positions of the outer side surface, the two second fixing portions 104 have the same extension size perpendicular to the outer side surface (the embodiment is not shown in the figure), the two edge positions are respectively close to two corner portions of the second base 102, and the two second fixing portions 104 on each outer side surface are arranged in a staggered manner along the optical axis direction (the embodiment is not shown in the figure); two strip-shaped memory alloy wires 106 are arranged between each outer side surface of the second base 102 and the opposite inner side surface of the first base 101, a first end of each shape memory alloy wire 106 is connected with a first fixing portion 105, each first fixing portion 105 is connected with the first ends of the two strip-shaped memory alloy wires 106, a second end of each shape memory alloy wire 106 is fixedly connected with a second fixing portion 104, and the two strip-shaped memory alloy wires 106 arranged between each outer side surface of the second base 102 and the opposite inner side surface of the first base 101 are arranged in a staggered manner along the optical axis direction (the embodiment is not shown in the figure).

The actuator having the auto-focus function and the optical image stabilization function of this embodiment will further save the space between the side wall of the first base 101 and the side wall of the second base 102.

Fig. 2 is a view in the optical axis direction, which is perpendicular to the paper. Fig. 3 is a side view of the autofocus module 20 shown in fig. 2.

Referring to fig. 2 and 3, the auto-focusing module 20 includes: a lens support section 202, the lens support section 202 being for supporting at least one lens and moving in an optical axis direction of the lens to perform focusing; two sets of driving devices, each set of driving devices comprising a permanent magnet 208, a coil 206 and a magnetic plate 204, the driving devices being configured to move the lens support 202 to a focal position of the lens in the optical axis direction; a guide ball 207, the guide ball 207 guiding the movement of the lens support section 202; and a frame 201, wherein the frame 201 is used for supporting the lens supporting part 202, the two sets of driving devices and the guide balls 207.

Preferably, a second hollow portion 203 is formed at a center position of the lens supporting portion 202 of the auto-focus module 20, the second hollow portion 203 can be used for arranging a lens so that the lens is supported by the lens supporting portion 202, the frame body 201 is arranged at an outer periphery of the lens supporting portion 202, and the guide ball 207 guides the lens supporting portion 202 to move relative to the frame body 201 along the optical axis direction.

Preferably, permanent magnets 208 are disposed on two adjacent outer side surfaces of the lens support portion 202, respectively, and magnetic circuits formed by the coil 206 and the magnetic plate 204 are disposed at positions facing the permanent magnets 208 on two adjacent inner side surfaces of the housing 201, respectively.

Taking the first set of driving means at the left part of fig. 2 as an example, the permanent magnets 208 of the first set of driving means are arranged on the outer side surface of the lens support part 202, e.g. embedded on the outer side surface of the lens support part 202. The coil 206 is provided on the inner surface of the housing 201.

The coil 206 and the permanent magnet 208 are disposed opposite to each other, so that a magnetic field generated when the coil 206 is energized interacts with a magnetic field of the permanent magnet 208, and the lens support 202 provided with the permanent magnet 208 moves along the optical axis direction of the lens, thereby implementing a focusing function.

The magnetic plate 204 is provided on the frame 201, and the magnetic plate 204 and the permanent magnet 208 are provided on both sides of the coil 20, respectively. Preferably, a magnetic attraction is generated between the magnetic plate 204 and the permanent magnet 208.

The flexible circuit board 205 is disposed between the magnetic plate 204 and the coil 206. The flexible circuit board 205 supplies a control signal, a driving current, and the like to the coil 206.

The second group of driving means is disposed on a side (e.g., a lower portion shown in fig. 2) of the auto-focus module 20 adjacent to a side (a left portion shown in fig. 2) where the first group of driving means is located, and the specific arrangement of the second group of driving means is the same as that of the first group of driving means.

Preferably, the first set of driving means and the second set of driving means share a flexible circuit board 205.

The guide balls 207 are provided at the corners between the first drive means and the second drive means, and the guide balls 207 are sandwiched by the corners of the frame 201 and the corners of the lens support portion 202.

The guide balls 207 preferably include two sets of guide balls, a first set of guide balls 2071 and a second set of guide balls 2072.

Preferably, the first and second groups of

guide balls

2071 and 2072 each include three guide balls, and as shown in fig. 3, the three guide balls of the first group of guide balls 2071 are arranged in line in the optical axis direction, and the three guide balls of the second group of guide balls 2072 are arranged in line in the optical axis direction.

Preferably, a middle ball of the three guide balls of the first group of guide balls 2071 has a smaller size than the other two guide balls (the upper ball and the lower ball) having the same size.

The middle ball of the three guide balls of the second group of guide balls 2072 has a smaller size than the other two guide balls, which have the same size (the upper and lower balls).

The upper balls of the first group of guide balls 2071 are the same size as the upper balls of the second group of guide balls 2072.

The middle balls of the first group of guide balls 2071 are the same size as the middle balls of the second group of guide balls 2072.

The lower balls of the first group of guide balls 2071 are the same size as the lower balls of the second group of guide balls 2072.

The upper and lower balls are in contact with the respective contact surfaces, so that smooth sliding of the lens support portion 201 in the optical axis direction is ensured, and the middle ball ensures smooth sliding between the upper and lower balls.

The control principle of the actuator having the auto-focus function and the optical image stabilization function of the present invention will be further described with reference to fig. 6 and 7.

In fig. 6, the horizontal direction along the paper surface is the X direction, the vertical direction along the paper surface is the Y direction, and the Z direction is perpendicular to the paper surface and extends outward from the paper surface.

A. B, C, D, E, F, G, H are all switches.

When the switch E, G is closed and the other switches are opened, as shown in fig. 6, the shape memory alloy wire in the loop of the switch E contracts and the shape memory alloy wire in the loop of the switch G contracts, so that the second base 102 moves in the direction of the arrow shown in the figure, i.e., in the X + direction.

When the switch A, C is closed and the other switches are open, as shown in fig. 6, the shape memory alloy wire of the loop in which switch a is located contracts and the shape memory alloy wire of the loop in which switch C is located contracts, causing the second base 102 to move in the direction of the arrow shown in the figure, i.e., in the X-direction.

When the switch B, D is closed and the other switches are opened, as shown in fig. 6, the shape memory alloy wire in the loop of the switch B contracts and the shape memory alloy wire in the loop of the switch D contracts, so that the second base 102 moves in the direction of the arrow shown in the figure, i.e., in the Y + direction.

When the switch F, H is closed and the other switches are open, as shown in FIG. 6, the shape memory alloy wire in the loop of switch F contracts and the shape memory alloy wire in the loop of switch H contracts, causing the second base 102 to move in the direction of the arrow shown, i.e., in the Y-direction.

When the switch B, C, E, H is closed and the other switches are open, as shown in fig. 6, the shape memory alloy wire of the circuit in which the switch B is located contracts, the shape memory alloy wire of the circuit in which the switch C is located contracts, the shape memory alloy wire of the circuit in which the switch E is located contracts, and the shape memory alloy wire of the circuit in which the switch H is located contracts, so that the second base 102 rotates clockwise, i.e., rotates rightward.

When the switch A, D, F, G is closed and the other switches are opened, as shown in fig. 6, the shape memory alloy wire of the circuit in which the switch a is located contracts, the shape memory alloy wire of the circuit in which the switch D is located contracts, the shape memory alloy wire of the circuit in which the switch F is located contracts, and the shape memory alloy wire of the circuit in which the switch G is located contracts, so that the second base 102 rotates in the counterclockwise direction, that is, rotates to the left.

The automatic focusing module 20 is driven by the second base 102 to move in the X + direction, the X-direction, the Y + direction, the Y-direction, the clockwise direction and the counterclockwise direction.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. Other variations or modifications will occur to those skilled in the art based on the foregoing disclosure and are within the scope of the invention.

Claims

1. An actuator having an auto-focus function and an optical image stabilization function, comprising:

the optical anti-shake module comprises a first base, a second base and a shape memory alloy wire, wherein a first fixing part is arranged on the first base, a second fixing part is arranged on the second base, a first end of the shape memory alloy wire is fixedly connected with the first fixing part, and a second end of the shape memory alloy wire is fixedly connected with the second fixing part; and

the automatic focusing module is arranged on the second base;

when the shape memory alloy wire is electrified, the second base moves in the horizontal direction perpendicular to the optical axis direction of the actuator, and the second base drives the automatic focusing module to move in the horizontal direction.

2. The actuator having an auto-focusing function and an optical image stabilizing function according to claim 1, wherein the first base has a bottom wall and four side walls forming a space for accommodating the second base; the second base also has a bottom wall and four side walls forming a space for accommodating the autofocus module.

3. The actuator having an auto-focus function and an optical image stabilization function according to claim 2, wherein the number of the shape memory alloy wires is eight, the number of the first fixing portions is four, and the number of the second fixing portions is eight;

the four first fixing parts are respectively arranged at four corners of the first base;

the four outer side surfaces of the second base are respectively provided with two second fixing parts, the two second fixing parts on each outer side surface of the second base are respectively arranged at two edge positions of the outer side surface, the two second fixing parts have different extension sizes vertical to the outer side surface, the two edge positions are respectively close to two corner parts of the second base, and the two second fixing parts on each outer side surface are arranged in a non-staggered manner along the optical axis direction;

two strip-shaped memory alloy wires are arranged between each outer side face of the second base and the opposite inner side face of the first base, the first end of each shape memory alloy wire is connected with a first fixing portion, each first fixing portion is connected with the first ends of the two strip-shaped memory alloy wires, the second end of each shape memory alloy wire is fixedly connected with a second fixing portion, and the two strip-shaped memory alloy wires arranged between each outer side face of the second base and the opposite inner side face of the first base are arranged in a non-staggered mode along the optical axis direction.

4. The actuator having an auto-focus function and an optical image stabilization function according to claim 2, wherein the number of the shape memory alloy wires is eight, the number of the first fixing portions is four, and the number of the second fixing portions is eight;

the four outer side surfaces of the second base are respectively provided with two second fixing parts, the two second fixing parts on each outer side surface of the second base are respectively arranged at two edge positions of the outer side surface, the two second fixing parts have the same extension size vertical to the outer side surface, the two edge positions are respectively close to two corner parts of the second base, and the two second fixing parts on each outer side surface are arranged in a staggered mode along the optical axis direction;

two strip-shaped memory alloy wires are arranged between each outer side face of the second base and the opposite inner side face of the first base, the first end of each shape memory alloy wire is connected with a first fixing portion, each first fixing portion is connected with the first ends of the two strip-shaped memory alloy wires, the second end of each shape memory alloy wire is fixedly connected with a second fixing portion, and the two strip-shaped memory alloy wires arranged between each outer side face of the second base and the opposite inner side face of the first base are arranged in a staggered mode along the optical axis direction.

5. The actuator having the auto-focus function and the optical image stabilization function according to any one of claims 2 to 4, further comprising a guide ball provided between a bottom wall of the second base and a bottom wall of the first base for guiding movement of the second base with respect to the first base.

6. The actuator having an auto-focus function and an optical image stabilization function according to claim 5, wherein the number of the guide balls is three, two of the guide balls are respectively provided at two adjacent corners of the second base, and the third guide ball is provided at a middle position of a bottom side which is not adjacent to each of the two adjacent corners.

7. The actuator having an autofocus function and an optical image stabilizing function according to claim 2, wherein the first fixing portion is a cylinder extending from a bottom wall of the first base in the optical axis direction, and the second fixing portion is a protrusion extending outward from a side wall of the second base.

8. The actuator having an autofocus function and an optical image stabilization function according to claim 1, wherein the first fixing portion extends not more than a length of the side wall of the first base in the optical axis direction.

9. Actuator with autofocus and optical image stabilization according to claim 1 or 2, characterized in that the autofocus module comprises:

a lens support part for supporting at least one lens and moving in an optical axis direction of the lens to perform focusing;

the driving device is used for enabling the lens supporting part to move to the focal position of the lens in the optical axis direction;

a guide ball guiding movement of the lens support part; and

and the frame body is used for supporting the lens supporting part, the two groups of driving devices and the guide balls.

10. The actuator having the auto-focusing function and the optical image stabilizing function according to claim 9, wherein the permanent magnets are disposed on two adjacent outer side surfaces of the lens support portion, respectively, and magnetic circuits each including the coil and the magnetic plate are disposed at positions facing the permanent magnets on two adjacent inner side surfaces of the housing, respectively.