阅读说明：本技术 相机模块 (Camera module ) 是由 闵庚重 于 2019-07-08 设计创作，主要内容包括：相机模块包括：具有内部空间的壳体；第一移动体,设置在壳体的内部空间中；第二移动体,设置在第一移动体的内部空间中；第一驱动构件,设置在壳体与第一移动体之间的空间中,并且包括由形状记忆合金形成的第一驱动线和连接到第一驱动线的两端的第一弯曲弹性线；以及第二驱动构件,设置在第一移动体与第二移动体之间的空间中,并且包括由形状记忆合金形成的第二驱动线和连接到用于AF的驱动线的两端的第二弯曲弹性线。第一弯曲弹性线与第一移动体接触,以及第二弯曲弹性线与第二移动体接触。(The camera module includes: a housing having an interior space; a first moving body disposed in an inner space of the housing; a second moving body disposed in an inner space of the first moving body; a first driving member disposed in a space between the housing and the first moving body and including a first driving wire formed of a shape memory alloy and first bending elastic wires connected to both ends of the first driving wire; and a second driving member disposed in a space between the first moving body and the second moving body and including a second driving line formed of a shape memory alloy and second bending elastic lines connected to both ends of the driving line for AF. The first curved elastic threads are in contact with the first moving body, and the second curved elastic threads are in contact with the second moving body.)

1. A camera module, comprising:

a housing including an interior space;

a first moving body provided in the inner space of the housing;

a second moving body provided in an inner space of the first moving body;

a first driving member disposed in a space between the housing and the first moving body and including a first driving wire formed of a shape memory alloy and first bending elastic wires connected to both ends of the first driving wire; and

a second driving member disposed in a space between the first moving body and the second moving body and including a second driving wire formed of a shape memory alloy and second bending elastic wires connected to both ends of the second driving wire,

wherein the first curved elastic wire is in contact with the first moving body, and the second curved elastic wire is in contact with the second moving body.

2. The camera module as claimed in claim 1,

wherein the first drive member is configured to: the first moving body is moved by the first bending elastic wire deformed by the expansion and contraction of the first driving wire, and

wherein the second drive member is configured to: the second moving body is moved by the second bending elastic wire deformed by the expansion and contraction of the second driving wire.

3. A camera module according to claim 1, wherein the first drive member comprises:

the drive member may include a drive member disposed in contact with a first inner surface of the housing, a drive member disposed in contact with a second inner surface of the housing opposite the first inner surface, a drive member disposed in contact with a third inner surface of the housing adjacent the first inner surface, and a drive member disposed in contact with a fourth inner surface of the housing opposite the third inner surface.

4. The camera module of claim 1, further comprising: a first support rod contacting the second driving member and disposed on a first outer surface of the second moving body; and a second support bar contacting the second driving member and disposed on a second outer surface of the second moving body opposite to the first outer surface.

5. The camera module of claim 4, wherein the second driving member includes a driving member in contact with the first support bar and a driving member in contact with the second support bar.

6. A camera module according to claim 4, further comprising a ball member provided on at least one outer surface of the second mobile body other than the first outer surface and the second outer surface.

7. The camera module according to claim 6, wherein the ball member is inserted into a guide member provided on the at least one outer surface of the second mobile body.

8. A camera module as claimed in claim 5,

wherein the first support bar is disposed at an upper portion of the first outer surface of the second moving body, and the second support bar is disposed at a lower portion of the second outer surface of the second moving body,

wherein the driving member contacting the first support bar contacts with a lower surface of the first support bar, and the driving member contacting the second support bar contacts with an upper surface of the second support bar.

9. A camera module according to claim 1, further comprising a mounting port for mounting the first drive member disposed on an inner surface of the housing.

10. A camera module, comprising:

a housing;

a first moving body provided in an inner space of the housing;

a second moving body provided in an inner space of the first moving body;

a first driving member disposed in a space between the housing and the first moving body and including a first driving wire formed of a shape memory alloy and first elastic wires connected to both ends of the first driving wire; and

a second driving member disposed in a space between the first moving body and the second moving body and including a second driving wire formed of a shape memory alloy and second elastic wires connected to both ends of the second driving wire,

wherein the first drive member is configured to move the first movable body by the first elastic wire deformed by extension and contraction of the first drive wire, and

wherein the second driving member is configured to move the second mover by the second elastic wire deformed by the expansion and contraction of the second driving wire.

11. A camera module, comprising:

a housing;

a first moving body provided in the housing;

a second moving body including a lens and disposed in an inner space of the first moving body;

a first driving member that is provided in a space between the housing and the first moving body and is in contact with four inner surfaces of the housing, and is configured to move the first moving body in a first direction perpendicular to an optical axis direction and a second direction perpendicular to the optical axis direction and the first direction; and

a second drive member that is provided in a space between the first moving body and the second moving body, and that is in contact with both outer surfaces of the second moving body, and that is configured to move the second moving body in the optical axis direction.

12. The camera module according to claim 11, wherein the second moving body includes a first support bar provided on a first outer surface and a second support bar provided on a second outer surface opposite to the first outer surface, and

the second driving member includes a first member configured to contact the first support rod to move the second moving body in the optical axis direction, and a second member configured to contact the second support rod to move the second moving body in the optical axis direction.

Technical Field

The following description relates to a camera module.

Background

Camera modules have been used in portable electronic devices such as smart phones, tablet computers, laptop computers, and the like, and cameras used in mobile terminals may include an auto-focus function, an anti-shake function, a zoom function, and the like.

However, in order to implement various functions, the structure of the camera module may become complicated, and the size of the camera module may also increase, so that the size of the portable electronic device in which the camera module is mounted also needs to increase.

With the growth of the smartphone camera market, there have been attempts to achieve miniaturization and integration of functions of a conventional manual camera, such as an Auto Focus (AF) function, an optical zoom function, and the like, and an optical image anti-shake (OIS) driving method, and various structures of a camera module have been developed. Therefore, there is a need for an OIS driving method that is different from the conventional OIS method.

Disclosure of Invention

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one general aspect, a camera module includes: a housing including an interior space; a first moving body disposed in an inner space of the housing; a second moving body disposed in an inner space of the first moving body; a first driving member disposed in a space between the housing and the first moving body and including a first driving wire formed of a shape memory alloy and first bending elastic wires connected to both ends of the first driving wire; and a second driving member disposed in a space between the first moving body and the second moving body and including a second driving wire formed of a shape memory alloy and second bending elastic wires connected to both ends of the second driving wire. The first curved elastic threads are in contact with the first moving body, and the second curved elastic threads are in contact with the second moving body.

The first driving member may move the first mover by a first bending elastic wire deformed by extension and contraction of the first driving wire, and the second driving member may move the second mover by a second bending elastic wire deformed by extension and contraction of the second driving wire.

The first drive member may comprise: the drive member may be configured to contact a first inner surface of the housing, the drive member may be configured to contact a second inner surface of the housing opposite the first inner surface, the drive member may be configured to contact a third inner surface of the housing adjacent the first inner surface, and the drive member may be configured to contact a fourth inner surface of the housing opposite the third inner surface.

The camera module may include: a first support rod contacting the second driving member and disposed on a first outer surface of the second moving body; and a second support bar contacting the second driving member and disposed on a second outer surface of the second moving body opposite to the first outer surface.

The second driving member may include a driving member contacting the first support bar, and a driving member contacting the second support bar.

The camera module may include a ball member disposed on at least one outer surface of the second moving body other than the first outer surface and the second outer surface.

The ball member may be inserted into a guide member provided on at least one outer surface of the second mobile body.

The first support bar may be disposed at an upper portion of a first outer surface of the second moving body, the second support bar may be disposed at a lower portion of a second outer surface of the second moving body, the driving member contacting the first support bar may contact a lower surface of the first support bar, and the driving member contacting the second support bar may contact an upper surface of the second support bar.

The camera module may include a mounting port for mounting a first driving member disposed on an inner surface of the housing.

In another general aspect, a camera module includes: a housing; a first moving body disposed in an inner space of the housing; a second moving body disposed in an inner space of the first moving body; a first driving member disposed in a space between the housing and the first moving body and including a first driving wire formed of a shape memory alloy and first elastic wires connected to both ends of the first driving wire; and a second driving member disposed in a space between the first moving body and the second moving body and including a second driving wire formed of a shape memory alloy and second elastic wires connected to both ends of the second driving wire. The first driving member moves the first moving body by the first elastic wires deformed by the expansion and contraction of the first driving wire, and the second driving member moves the second moving body by the second elastic wires deformed by the expansion and contraction of the second driving wire.

In another general aspect, a camera module includes: a housing; a first moving body provided in the housing; a second moving body including a lens and disposed in an inner space of the first moving body; a first driving member provided in a space between the housing and the first moving body and contacting four inner surfaces of the housing to move the first moving body in a first direction perpendicular to the optical axis direction and a second direction perpendicular to the optical axis direction and the first direction; and a second driving member that is provided in a space between the first moving body and the second moving body, and that is in contact with both outer surfaces of the second moving body to move the second moving body in the optical axis direction.

The second moving body may include a first support rod provided on a first outer surface and a second support rod provided on a second outer surface opposite to the first outer surface, and the second driving member may include a first member contacting the first support rod to move the second moving body in the optical axis direction and a second member contacting the second support rod to move the second moving body in the optical axis direction.

Other features and aspects will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

Drawings

Fig. 1 is a perspective view illustrating a portable electronic device according to an example.

Fig. 2 is a schematic diagram illustrating a camera module according to an example.

Fig. 3 is a plan view illustrating a camera module according to an example.

Fig. 4 is a schematic perspective view illustrating a first moving body, a second moving body, and a driving member for Auto Focus (AF) of a camera module according to an example.

Fig. 5 is a diagram illustrating the first moving body, the second moving body, and the driving member for AF of the camera module according to the example, as viewed from the front.

Fig. 6 to 7 are diagrams illustrating an operation of a first moving body of a camera module according to an example.

Fig. 8 to 9 are diagrams illustrating an operation of a second moving body of a camera module according to an example.

Like reference numerals refer to like elements throughout the drawings and detailed description. The figures may not be drawn to scale and the relative sizes, proportions and depictions of the elements in the figures may be exaggerated for clarity, illustration and convenience.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. Various changes, modifications, and equivalents of the methods, devices, and/or systems described in this application will, however, become apparent after understanding the disclosure of this application. For example, the order of operations described in this application is merely an example, and is not limited to the order set forth in this application, except to the extent that operations must occur in a particular order, as obvious variations may be made upon understanding the disclosure of this application. In addition, descriptions of features well known in the art may be omitted for the sake of clarity and conciseness.

The features described in this application may be embodied in different forms and should not be construed as limited to the examples described in this application. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, apparatuses, and/or systems described herein, which will be apparent after understanding the disclosure of the present application.

It should be noted that in this application, the use of the word "may" with respect to an example or embodiment (e.g., with respect to what the example or embodiment may include or implement) means that there is at least one example or embodiment in which such feature is included or implemented, but all examples and embodiments are not limited thereto.

Throughout the specification, when an element such as a layer, region or substrate is described as being "on," "connected to" or "coupled to" another element, it can be directly on, "connected to" or "coupled to" the other element or one or more other elements may be present between the element and the other element. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there may be no other elements intervening between the element and the other element.

As used in this application, the term "and/or" includes any one of the associated listed items as well as any combination of any two or more items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in an example described in this application may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the example.

Spatially relative terms such as "above … …," "above," "below … …," and "below" may be used herein for descriptive convenience to describe one element's relationship to another element as illustrated in the figures. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be "below" or "lower" relative to the other element. Thus, the phrase "above … …" encompasses both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used in this application should be interpreted accordingly.

The terminology used in the present application is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The articles "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may occur. Accordingly, examples described in this application are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacturing.

The features of the examples described in this application may be combined in various ways that will be apparent after understanding the disclosure of this application. Further, while the examples described in this application have a variety of configurations, other configurations are possible as will be apparent after understanding the disclosure of this application.

Hereinafter, examples will be described with reference to the drawings.

Fig. 1 is a perspective view illustrating a portable electronic device according to an example.

Referring to fig. 1, the portable electronic device 1 may be implemented as a mobile communication terminal device, a smart phone, a tablet computer, or the like, on which a camera module 10 is mounted.

As shown in fig. 1, the portable electronic device 1 may include a camera module 10 that images a subject.

The camera module 10 may include a plurality of lenses, and the optical axes (Z axis in fig. 2) of the lenses may be oriented in the thickness direction of the portable electronic device 1 (Y axis direction in fig. 1, direction from the front surface toward the back surface of the portable electronic device 1, or direction from the back surface toward the front surface of the portable electronic device 1).

In the camera module 10, an optical image anti-shake (OIS) function or an Auto Focus (AF) function may be performed by a driving member 140 for OIS (see fig. 2 to 3) and a driving member 150 for AF (see fig. 4 to 5), which will be described in the following description.

Fig. 2 is a schematic diagram illustrating a camera module according to an example. Fig. 3 is a plan view illustrating a camera module according to an example. Fig. 4 is a schematic perspective view illustrating a first moving body, a second moving body, and a driving member for AF of a camera module according to an example. Fig. 5 is a diagram illustrating the first moving body, the second moving body, and the driving member for AF of the camera module according to the example, as viewed from the front.

Referring to fig. 2 to 5, the camera module 100 may include a housing 110, a first moving body 120, a second moving body 130, a driving member 140 for OIS, and a driving member 150 for AF.

The case 110 may have an inner space, and may have a hexahedral shape. An opening (not shown) may be formed on the bottom surface of the housing 110. The first mounting ports 112 for mounting the driving member 140 for OIS may be provided on four side surfaces among the inner surfaces of the housing 110. The drive member 140 for OIS may be mounted on the first mounting port 112 and may be extendable and retractable over the first mounting port 112.

The first mover 120 may be installed in the housing 110 and may move in the inner space of the housing 110. As an example, the first mover 120 may move in two axial directions (e.g., X-axis and Y-axis) in the inner space of the housing 110. The first moving body 120 may have an approximately hexahedral shape.

A second mounting port 122 for mounting the driving member 150 for AF may be provided on an inner surface of the first moving body 120.

The second mover 130 may be installed in the first mover 120 such that the second mover 130 can move in one axial direction (e.g., Z-axis) with respect to the first mover 120. As an example, the first support bar 132 for supporting the driving member 150 for AF may be disposed on one side surface of the outer surface of the second moving body 130, and the second support bar 134 for supporting the driving member 150 for AF may be disposed on the other side surface of the second moving body 130, which is opposite to the side surface of the second moving body 130 on which the first support bar 132 is disposed. The first support bar 132 may be disposed at an upper end of one side surface of the second moving body 130, and the second support bar 134 may be disposed at a lower end of the other side surface of the second moving body 130. The guide member 136 of the guide ball member 160 may be disposed on the remaining side surface of the second moving body 130 (the side surface of the second moving body excluding the first and second support bars 132 and 134) to smoothly move the second moving body 130.

A plurality of lenses (not shown) may be installed in the second moving body 130.

The driving member 140 for OIS may be disposed in a space between the housing 110 and the first mover 120. The driving member 140 for OIS may be in contact with four side surfaces of the inner surface of the case 110 and four side surfaces of the outer surface of the first mover 120. As an example, the driving member 140 for OIS may include a first driving member 141 for OIS disposed in contact with a first side surface among the inner surfaces of the housing 110, a second driving member 142 for OIS disposed on a second side surface opposite to the first side surface among the inner surfaces of the housing 110 so as to be opposite to the first driving member 141 for OIS, a third driving member 143 for OIS disposed on a third side surface adjacent to the first side surface among the inner surfaces of the housing 110, and a fourth driving member 144 for OIS opposite to the third driving member 143 for OIS.

The first driving member 141 for OIS may include a first driving line 141a for OIS formed of a shape memory alloy, and first elastic lines 141b for OIS having a curved shape and connected to both ends of the first driving line 141a for OIS. An end of the first driving line 141a for OIS may be in contact with an end of the first elastic line 141b for OIS. The maximum shrinkage rate of the first driving line 141a for OIS may be about 2.2%. As an example, when the first drive line 141a for OIS is 8mm, the maximum stroke (the maximum moving distance of the first moving body 120) may be 834 μm, and when the first drive line 141a for OIS is 5mm, the maximum stroke (the maximum moving distance of the first moving body 120) may be 521 μm. Therefore, the maximum stroke can be increased compared to the stroke (i.e., 230 μm) in the conventional camera module.

The first elastic wire 141b for OIS may be disposed in contact with the first moving body 120, and the first driving wire 141a for OIS may be disposed in contact with an inner surface (first side surface) of the case 110.

The second driving member 142 for OIS, the third driving member 143 for OIS, and the fourth driving member 144 for OIS may also include a second driving line 142a for OIS, a third driving line 143a for OIS, and a fourth driving line 144a for OIS, and a second elastic line 142b for OIS, a third elastic line 143b for OIS, and a fourth elastic line 144b for OIS, each of which is formed of a shape memory alloy, each of which has a curved shape and is connected to ends of the corresponding second driving line 142a for OIS, third driving line 143a for OIS, and fourth driving line 144a for OIS.

A method of driving the first moving body 120 will be described with reference to fig. 6 and 7.

A driving method of moving the first moving body 120 to the right side of the X axis as shown in fig. 6 will be described. In order to move the first moving body 120 to the right side of the X-axis, the first driving member 141 for OIS may be contracted. The first elastic wire 141b for OIS may form an arc having a diameter smaller than that of an initially formed arc (e.g., the arc of the first elastic wire 141b for OIS as shown in fig. 3). The first elastic line 141b for OIS may be bent in the opposite direction to the first driving line 141a for OIS. Accordingly, the deformed first elastic wire 141b for OIS may transmit a driving force to one side surface of the first mover 120 so that the first mover 120 may move to the right side of the X-axis. The second drive member 142 for OIS may be extended. The second elastic wire 142b for OIS may form an arc having a diameter greater than the diameter of the initially formed arc (e.g., the arc of the second elastic wire 142b for OIS as shown in fig. 3). The second elastic wire 142b for OIS may be bent in a direction toward the second driving wire 142a for OIS.

When the first moving body 120 moves in the X-axis direction, the third driving member 143 for OIS and the fourth driving member 144 for OIS may maintain the initial state without affecting the movement of the first moving body 120 in the X-axis direction.

A driving method of moving the first moving body 120 to the left side of the X axis will be described. In order to move the first moving body 120 to the left side of the X-axis, the second driving member 142 for OIS may be contracted. The second elastic wire 142b for OIS may form an arc having a diameter smaller than that of the initially formed arc. The second elastic wire 142b for OIS may be bent in the opposite direction to the second driving wire 142a for OIS. Accordingly, the deformed second elastic wire 142b for OIS may transmit the driving force to the side surface of the first mover 120 so that the first mover 120 may move to the left side of the X-axis. The first drive member 141 for OIS may be extended. The first elastic wire 141b for OIS may form an arc having a diameter greater than that of the initially formed arc. The first elastic line 141b for OIS may be bent in a direction toward the first driving line 141a for OIS.

When the first moving body 120 moves in the X-axis direction, the third driving member 143 for OIS and the fourth driving member 144 for OIS may maintain the initial state without affecting the movement of the first moving body 120 in the X-axis direction.

A driving method of moving the first moving body 120 in the Y-axis direction as shown in fig. 7 will be described. In order to move the first moving body 120 upward along the Y-axis, the third driving member 143 for OIS may be contracted. The third elastic wire 143b for OIS may form an arc having a diameter smaller than that of an initially formed arc (e.g., the arc of the third elastic wire 143b for OIS as shown in fig. 3). The third elastic wire 143b for OIS may be bent in the opposite direction to the third driving wire 143a for OIS. Accordingly, the deformed third elastic wire 143b for the OIS may transmit the driving force to the side surface of the first mover 120 so that the first mover 120 may move in the Y-axis direction upward. The fourth drive member 144 for OIS may be extended. The fourth elastic wire 144b for OIS may form an arc having a diameter greater than the diameter of the initially formed arc (e.g., the arc of the fourth elastic wire 144b for OIS as shown in fig. 3). The fourth elastic wire 144b for OIS may be bent in a direction toward the fourth driving wire 144a for OIS.

When the first moving body 120 moves in the Y-axis direction, the first driving member 141 for OIS and the second driving member 142 for OIS may maintain the initial state without affecting the movement of the first moving body 120 in the Y-axis direction.

A driving method of moving the first moving body 120 downward in the Y-axis direction will be described. In order to move the first moving body 120 downward in the Y-axis direction, the fourth driving member 144 for OIS may be contracted. The fourth elastic wire 144b for the OIS may form an arc having a diameter smaller than that of the initially formed arc. The fourth elastic wire 144b for OIS may be bent in the opposite direction to the fourth driving wire 144a for OIS. Accordingly, the deformed fourth elastic wire 144b for OIS may transmit the driving force to the side surface of the first mover 120 so that the first mover 120 may move downward in the Y-axis direction. The third drive member 143 for OIS may be extended. The third elastic wire 143b for OIS may form an arc having a diameter greater than that of the initially formed arc. The third elastic wire 143b for OIS may be bent in a direction toward the third driving wire 143a for OIS.

When the first moving body 120 moves in the Y-axis direction, the first driving member 141 for OIS and the second driving member 142 for OIS may maintain the initial state without affecting the movement of the first moving body 120 in the Y-axis direction.

Referring back to fig. 4 and 5, the driving member 150 for AF may be disposed in a space between the first and second moving bodies 120 and 130, and may move the second moving body 130 in the Z-axis direction. The driving member 150 for AF may include a first driving member 151 for AF, which is in contact with the first support bar 132 of the second moving body 130, and a second driving member 152 for AF, which is in contact with the second support bar 134 of the second moving body 130.

The first driving member 151 for AF may include a first driving line 151a for AF formed of a shape memory alloy, and a first elastic line 151b for AF having a curved shape and connected to an end of the first driving line 151a for AF. An end of the first driving line 151a for AF may be in contact with an end of the first elastic line 151b for AF. The maximum shrinkage rate of the first driving line 151a for AF may be about 2.2%. The first elastic wire 151b for AF may be in contact with the lower surface of the first support rod 132.

The second driving member 152 for AF may also include a second driving wire 152a for AF formed of a shape memory alloy, and a second elastic wire 152b for AF having a curved shape and connected to an end of the second driving wire 152a for AF. The second elastic wire 152b for AF may be in contact with the upper surface of the second support bar 134.

In the following description, a method of driving the second moving body 130 will be described with reference to fig. 8 and 9.

A driving method of moving the second moving body 130 upward in the Z-axis direction as shown in fig. 8 will be described. In order to move the second moving body 130 upward in the Z-axis direction, the first driving member 151 for AF may be contracted. The first elastic wires 151b for AF may form arcs having a diameter smaller than that of an initially formed arc (e.g., an arc of the first elastic wires 151b for AF as shown in fig. 4). The first elastic wire 151b for AF may be bent in the opposite direction to the first driving wire 151a for AF. The deformed first elastic wires 151b for AF may transmit a driving force to the first support bars 132 so that the second moving body 130 may move upward in the Z-axis direction. The second drive member 152 for AF may be extended. The second elastic wires 152b for AF may form arcs having a diameter larger than that of an initially formed arc (e.g., an arc of the second elastic wires 152b for AF as shown in fig. 4). The second elastic line 152b for AF may be bent in a direction toward the second driving line 152a for AF.

A driving method of moving the second moving body 130 downward in the Z-axis direction as shown in fig. 9 will be described. In order to move the second moving body 130 downward in the Z-axis direction, the second driving member 152 for AF may be contracted. The second elastic wires 152b for AF may form arcs having a diameter smaller than that of an initially formed arc (e.g., an arc of the second elastic wires 152b for AF as shown in fig. 4). The second elastic line 152b for AF may be bent in the opposite direction to the second driving line 152a for AF. The deformed second elastic wire 152b for AF may transmit the driving force to the second support rod 134 so that the second moving body 130 may move downward in the Z-axis direction. The first driving member 151 for AF may be extended. The first elastic wires 151b for AF may form arcs having a diameter larger than that of an initially formed arc (e.g., an arc of the first elastic wires 151b for AF as shown in fig. 4). The first elastic wire 151b for AF may be bent in a direction toward the first driving wire 151a for AF.

As described above, sufficient strokes (moving distances) of the first moving body 120 and the second moving body 130 can be ensured by the driving member 140 for OIS and the driving member 150 for AF.

Also, by reducing the number of shape memory alloys, power consumption can be reduced.

In addition, since the driving wire formed of the shape memory alloy is connected to the elastic wire, damage caused by external impact can be prevented.

In addition, by reducing the number of drive lines formed of the shape memory alloy, the control operation can be easily performed.

While the present disclosure includes specific examples, it will be apparent after understanding the disclosure of the present application that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered merely as illustrative and not for purposes of limitation. The description of features or aspects in each example should be considered applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order and/or if components in the described systems, architectures, devices, or circuits are combined in a different manner and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure should be defined not by the detailed description but by the claims and their equivalents, and all modifications within the scope of the claims and their equivalents should be understood as being included in the present disclosure.