Lens module, camera module including the lens module, and portable electronic device

Abstract

A lens module, comprising: a bracket having an internal space; a lens unit including a lens group and mounted in the bracket such that at least two of the lens groups are independently movable in the longitudinal direction of the bracket; a guiding unit including guiding members provided on both side surfaces of the lens group to guide the movement of the movable lens group; and driving wires connected to each of the guiding members and formed of a shape memory alloy, wherein each of the movable lens groups is connected to a pair of guiding members provided on both sides of the bracket.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority benefit of Korean Patent Application No. 10 - 2020 - 0112428, filed on September 3, 2020, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. Technical field

[0003] The present disclosure relates to a lens module and a camera module including the lens module. Background art

[0004] Recently, camera modules have been standardly installed in portable electronic devices such as tablet personal computers (PCs), laptop computers, etc., and smartphones, and functions such as an autofocus (AF) function, an optical image stabilization (OIS) function, a zoom function, etc. have been added to camera modules for mobile terminals.

[0005] However, in order to implement various functions, the structure of the camera module has become complex, and the size of the camera module has increased, so that the size of the portable electronic device equipped with the camera module has increased.

[0006] With the growth of the smartphone camera market, attempts have been continuously made to miniaturize and integrate functions of a typical manual camera, such as having an OIS driving method, an AF function, and an optical zoom function. Therefore, the structure of the camera module can be diversified. Therefore, an OIS driving method different from the existing OIS driving method is needed.

[0007] The above information is presented only as background information to help understand the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above is applicable as prior art with respect to the present disclosure. Summary of the invention

[0008] The present invention content is provided to introduce some concepts in a simplified form, which are further described in the following detailed description. The present invention content is neither intended to identify the key features or essential features of the claimed subject matter nor intended to be used to help determine the scope of the claimed subject matter.

[0009] In one general aspect, a lens module includes: a bracket having an internal space; a lens unit including a lens group and mounted in the bracket such that at least two movable lens groups in the lens group can move independently in the longitudinal direction of the bracket, at least one of the lens groups including a plurality of lenses; a guiding unit including guiding members provided on two side surfaces of the lens group to guide the movement of the movable lens groups; and driving wires connected to each of the guiding members and formed of a shape memory alloy, wherein each of the movable lens groups is connected to a pair of guiding members provided on both sides of the bracket.

[0010] The guiding members can be provided in pairs corresponding to the number of the movable lens groups.

[0011] The bracket can include auxiliary guiding members having auxiliary guiding holes and provided on at least one side surface of the lens group, the auxiliary guiding holes being provided parallel to the moving direction of the movable lens groups to guide the movement of the movable lens groups.

[0012] The guiding members can include: a first guiding member provided on one side surface of the lens group; a second guiding member provided to overlap with the first guiding member; a third guiding member provided on the other side surface of the lens group; and a fourth guiding member provided to overlap with the third guiding member.

[0013] The first guiding member can have a first inclined guiding hole provided to be inclined in one direction; and the second guiding member can have a second inclined guiding hole provided to be spaced apart from the first inclined guiding hole and provided to be inclined in another direction opposite to the inclined direction of the first inclined guiding hole; and the first guiding member can have a first opening provided to face the second inclined guiding hole; and the second guiding member can have a second opening provided to face the first inclined guiding hole.

[0014] The third guiding member can have a third inclined guiding hole provided to be inclined in one direction; and the fourth guiding member can have a fourth inclined guiding hole provided to be spaced apart from the third inclined guiding hole and provided to be inclined in another direction opposite to the inclined direction of the third inclined guiding hole; the third guiding member can have a third opening provided to face the fourth inclined guiding hole; and the fourth guiding member can have a fourth opening provided to face the third inclined guiding hole.

[0015] Each movable lens group can include a coupling protrusion passing through the auxiliary guiding hole, and the coupling protrusion can be provided in the first inclined guiding hole and the second opening or provided in the second inclined guiding hole and the first opening, the first opening and the second opening being provided to face the second inclined guiding hole and the first inclined guiding hole, respectively.

[0016] The drive lines may include: a first drive line and a second drive line, arranged to cross each other at the upper end of the first guide member, and both having one end connected to the upper end of the first guide member; and a third drive line and a fourth drive line, arranged to cross each other below the first drive line and the second drive line, and both having one end connected to the lower end of the first guide member; a fifth drive line and a sixth drive line, arranged to cross each other at the upper end of the second guide member, and both having one end connected to the upper end of the second guide member; and a seventh drive line and an eighth drive line, arranged to cross each other below the fifth drive line and the sixth drive line, and both having one end connected to the lower end of the second guide member; a ninth drive line and a tenth drive line, arranged to cross each other at the upper end of the third guide member, and both having one end connected to the upper end of the third guide member; and an eleventh drive line and a twelfth drive line, arranged to cross each other below the ninth and tenth drive lines, and both having one end connected to the lower end of the third guide member; and a thirteenth and a fourteenth drive line, arranged to cross each other at the upper end of the fourth guide member, and both having one end connected to the upper end of the fourth guide member; and a fifteenth and a sixteenth drive line, arranged to cross each other below the thirteenth drive line and the fourteenth drive line, and both having one end connected to the lower end of the fourth guide member.

[0017] Each of the first to fourth guide members may guide the movement of the movable lens group when rising and falling in the vertical direction of the bracket.

[0018] The bracket may include a bottom plate and a cover plate arranged to face the bottom plate, and each of the bottom plate and the cover plate may include a mounting portion on which a mounting rod is mounted, and the end of the drive line is connected to the mounting rod.

[0019] One end of each drive line may be connected to a corresponding connection hole provided in one of the first to fourth guide members, and the other end of the drive line may be connected to a corresponding mounting rod.

[0020] The lens group may include: a first lens group, fixedly mounted on one side of the bracket; a second lens group, arranged behind the first lens group and movable in the light incident direction; and a third lens group, arranged behind the second lens group and movable.

[0021] The second lens group may be connected to the first guide member and the third guide member, and may move in the length direction of the bracket according to the rising and falling of the first guide member and the third guide member; and the third lens group may be connected to the second guide member and the fourth guide member, and may move in the length direction of the bracket according to the rising and falling of the second guide member and the fourth guide member.

[0022] The second lens group may have a coupling protrusion configured to pass through an auxiliary guiding hole of an auxiliary guiding member disposed in the bracket; and the third lens group may have a coupling protrusion configured to pass through an auxiliary guiding hole of an auxiliary guiding member disposed in the bracket.

[0023] The auxiliary guiding member may be detachably mounted to the bracket.

[0024] The lens module may further include a cover member coupled to the bracket to be disposed on two side surfaces of the lens group.

[0025] Each cover member may include a protrusion portion configured to reduce a contact area with the guiding member when the guiding member moves up and down.

[0026] A camera module may include: a reflection module configured to change a path of incident light; and the lens module through which the light whose path is changed by the reflection module passes.

[0027] A portable electronic device may include: a front main surface and a rear main surface facing each other in a thickness direction of the portable electronic device; and two or more camera modules, wherein one or more of the two or more camera modules are camera modules having the lens module, and wherein lens groups of the one or more camera modules having the lens module are disposed along an optical axis perpendicular to the thickness direction.

[0028] In another general aspect, a lens module includes: a bracket; a lens group disposed in the bracket and movable relative to the bracket in an optical axis direction; a guiding member disposed on an opposite side of the bracket connected to the lens group; and a driving wire formed of a shape memory alloy and connected to the bracket and the guiding member to drive the guiding member in a direction crossing the optical axis direction, wherein, in response to driving the guiding member in the direction crossing the optical axis direction, the lens group moves in the optical axis direction.

[0029] Other features and aspects will be apparent from the accompanying detailed description, drawings, and claims. Description of the Drawings

[0030] Figure 1 is a perspective view showing a portable electronic device according to one or more exemplary embodiments of the present disclosure.

[0031] Figure 2 is a schematic perspective view showing a camera module according to one or more exemplary embodiments of the present disclosure.

[0032] Figure 3 is a perspective view of a lens module according to one or more exemplary embodiments of the present disclosure.

[0033] Figure 4 is an exploded perspective view showing a lens module according to one or more exemplary embodiments of the present disclosure.

[0034] Figures 5 to 18 is a diagram depicting the operation of a lens module according to one or more exemplary embodiments of the present disclosure.

[0035] Throughout the drawings and the detailed description, like reference numerals denote like elements. The drawings may not be drawn to scale, and for clarity, illustration, and convenience, the relative dimensions, ratios, and depictions of elements in the drawings may be exaggerated. Detailed Description

[0036] Hereinafter, although examples of the present disclosure will be described in detail with reference to the drawings, it should be noted that the examples are not limited thereto.

[0037] The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalent forms of the methods, apparatuses, and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example, and the order of operations is not limited to those set forth herein. Rather, the order of operations may be changed, except for operations that must occur in a certain order, after understanding the present disclosure. Additionally, descriptions of functions and structures known in the art may be omitted for increased clarity and conciseness.

[0038] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. On the contrary, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatuses, and / or systems described herein, which will be apparent after understanding the present disclosure.

[0039] In this document, it should be noted that the term "may" is used with respect to an example or an embodiment, e.g., with respect to what an example or an embodiment may include or implement, meaning that there is at least one example or embodiment that includes or implements the feature, and all examples and embodiments are not limited thereto.

[0040] 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 may be directly "on," "connected to," or "coupled to" the other element, or there may be one or more other elements therebetween. Conversely, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, there can be no other elements therebetween. As used herein, a "portion" of an element may include the entire element or a part of the entire element that is less than the entire element.

[0041] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more thereof; similarly, "at least one" includes any one of the associated listed items and any combination of any two or more thereof.

[0042] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts are not limited by these terms. Instead, these terms are only used to distinguish one component, element, region, layer, or part from another. Thus, a first component, element, region, layer, or part referred to in the examples described herein may also be referred to as a second component, element, region, layer, or part without departing from the teachings of the examples.

[0043] Spatial relative terms such as "above", "upper", "below", "lower", etc. may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relative terms are intended to cover different orientations of the device in use or operation other than the orientation shown in the figures. For example, if the device in the figures is turned over, then an element described as "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Thus, depending on the spatial orientation of the device, the term "above" includes both the upper and lower orientations. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein will be interpreted accordingly.

[0044] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the articles "a", "an", and "the" are intended to include the plural forms as well. The terms "comprising", "including", and "having" specify the presence of stated features, numbers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof.

[0045] Due to manufacturing techniques and / or tolerances, the shapes shown in the figures may vary. Accordingly, the examples described herein are not limited to the specific shapes shown in the figures, but include shape variations that occur during manufacturing.

[0046] It will be apparent after understanding the disclosure that the features of the examples described herein can be combined in various ways. Additionally, although the examples described herein have various configurations, it will be apparent after understanding the disclosure that other configurations are possible.

[0047] One aspect of the present disclosure may provide a camera module in which a lens can move more smoothly.

[0048] Figure 1 FIG. is a perspective view showing a portable electronic device according to one or more exemplary embodiments of the present disclosure.

[0049] Reference Figure 1 , the portable electronic device 1 according to an exemplary embodiment of the present disclosure may be a portable electronic device equipped with a camera module 10, such as a mobile communication terminal, a smart phone, a tablet personal computer (PC), etc.

[0050] As Figure 1 shown, the portable electronic device 1 may be equipped with two camera modules 10 to capture an image of an object.

[0051] In the present exemplary embodiment, the first camera module 10 may include a plurality of lenses, and the optical axis of each lens may point in a direction perpendicular to the thickness direction (Z-axis direction, or the direction from the front surface to the rear surface of the portable electronic device, or the direction opposite to the direction from the front surface to the rear surface of the portable electronic device) of the portable electronic device 1. For example, in the Y-axis direction.

[0052] As an example, the optical axis of each of the plurality of lenses included in the additional second camera module 10 may be formed in the thickness direction (Z-axis direction) of the portable electronic device 1.

[0053] Therefore, even if the camera module 10 including the first camera module and the second camera module has functions such as an autofocus (hereinafter referred to as AF) function, a zoom function, and an optical image stabilization (hereinafter referred to as OIS) function, the thickness of the portable electronic device 1 will not increase. Therefore, the portable electronic device 1 can be miniaturized and thinned.

[0054] The camera module 10 according to an exemplary embodiment of the present disclosure may have at least one of an AF function, a zoom function, and an OIS function.

[0055] Since the camera module 10 having functions such as an AF function, a zoom function, and an OIS function needs to include various components, the size of the camera module will increase compared to a general camera module.

[0056] When the size of the camera module 10 increases, one problem faced is miniaturizing the portable electronic device 1 equipped with the camera module 10.

[0057] For example, when the number of lenses stacked in a camera module is increased for the purpose of a zoom function and multiple stacked lenses are formed in the thickness direction of a portable electronic device in the camera module, the thickness of the portable electronic device also increases according to the number of stacked lenses. Therefore, when the thickness of the portable electronic device does not increase, it may not be possible to sufficiently ensure the number of stacked lenses, which may deteriorate the zoom performance.

[0058] In addition, in order to implement an AF function and an OIS function, an actuator for moving a lens group in the optical axis direction or a direction perpendicular to the optical axis needs to be installed, and when the optical axis of the lens group is formed in the thickness direction of the portable electronic device, the actuator for moving the lens group also needs to be installed in the thickness direction of the portable electronic device. Therefore, the thickness of the portable electronic device increases.

[0059] However, in the camera module 10 according to an exemplary embodiment of the present disclosure, a plurality of lenses are arranged such that the optical axis of each of the plurality of lenses is perpendicular to the thickness direction of the portable electronic device 1. Therefore, even when the camera module 10 having an AF function, a zoom function, and an OIS function is installed in the portable electronic device 1, the portable electronic device 1 can be miniaturized.

[0060] Figure 2 is a schematic perspective view showing a camera module according to one or more exemplary embodiments of the present disclosure.

[0061] Reference Figure 2 , the camera module 10 according to an exemplary embodiment of the present disclosure may include a reflection module 30, a lens module 100, and an image sensor module (not shown) provided in a housing 20.

[0062] The reflection module 30 may change the propagation direction of light. As an example, the propagation direction of light incident through an opening 22a in a cover 22 covering the camera module 10 above the camera module 10 may be changed by the reflection module 30 such that the light is directed to the lens module 100. To this end, the reflection module 30 may include a reflection member (not shown) or a refraction member (not shown) that reflects light.

[0063] The path of light incident through the opening 22a may be changed by the reflection module 30 such that the light is directed to the lens module 100. For example, the path of light incident on the camera module 10 in the thickness direction (Z-axis direction) of the camera module 10 may be changed by the reflection module 30 to be substantially parallel to the optical axis direction (Y-axis direction).

[0064] The lens module 100 may include a plurality of lenses, light whose propagation direction is changed by the reflection module 30 passes through the plurality of lenses, and the image sensor module may include an image sensor (not shown) that converts the light passing through the plurality of lenses into an electrical signal and a printed circuit board (not shown) on which the image sensor is mounted. Additionally, the image sensor module may include a filter (not shown) that filters the light incident thereon from the lens module 100. The filter (not shown) may be an infrared cut-off filter.

[0065] In the inner space of the housing 20, the reflection module 30 may be disposed in front of the lens module 100, and the image sensor module may be disposed behind the lens module 100.

[0066] Figure 3 is a perspective view of a lens module according to one or more exemplary embodiments of the present disclosure, Figure 4 is an exploded perspective view showing a lens module according to one or more exemplary embodiments of the present disclosure.

[0067] Reference Figure 3 and Figure 4 As an example, according to one or more exemplary embodiments of the present disclosure, the lens module 100 may include a bracket 110, a lens unit 120, a lens guiding unit 130, a driving wire 140, and a cover member 150.

[0068] The bracket 110 may have an inner space, and the lens unit 120 may be disposed in the inner space of the bracket 110. As an example, the bracket 110 may have a generally rectangular parallelepiped box shape with both ends open. The bracket 110 may include a bottom plate 111, a cover plate 112 disposed to face the bottom plate 111, and an auxiliary guiding member 113 disposed in the length direction (e.g., the Y-axis direction) of the bracket 110 and having an auxiliary guiding hole 113a. As an example, the auxiliary guiding member 113 may be detachably mounted on at least one side of each of the bottom plate 111 and the cover plate 112. Additionally, the auxiliary guiding hole 113a may be disposed at the central portion of the auxiliary guiding member 113 in the length direction. Additionally, the auxiliary guiding member 113 may include a protruding stepped portion 113b to reduce friction with the guiding member 132 (described below) of the lens guiding unit 130.

[0069] In addition, both ends of the bracket 110 may be open.

[0070] The bottom plate 111 may include: a support portion 111a on which the lens unit 120 is disposed; and a mounting portion 111b that extends from both sides of the support portion 111a and on which mounting rods 111c connected to the driving wire 140 are mounted.

[0071] Meanwhile, the cover plate 112 may also include a mounting portion 112b to which a mounting rod 111c connected to the driving wire 140 is mounted.

[0072] Meanwhile, Figure 4 The state where an auxiliary guiding member 113 is mounted at the bottom plate 111 and the cover plate 112, and the state where another auxiliary guiding member 113 is separated from the bottom plate 111 and the cover plate 112 are shown, but the two auxiliary guiding members 113 arranged to face each other can be detachably mounted to the bottom plate 111 and the cover plate 112.

[0073] Here, terms regarding directions will be defined. The thickness direction of the bracket 110 refers to Figure 3 and Figure 4 the Z-axis direction shown, the length direction of the bracket 110 refers to Figure 3 and Figure 4 the Y-axis direction shown, and the width direction of the bracket 110 refers to Figure 3 and Figure 4 the X-axis direction shown.

[0074] The lens unit 120 may include a plurality of lens groups and may be mounted in the bracket 110 to be disposed in the inner space of the bracket 110. As an example, the lens unit 120 may include: a first lens group 121 fixedly mounted on one side of the bracket 110; a second lens group 122 disposed on one side of the first lens group 121 and movably mounted in the bracket 110; and a third lens group 123 disposed on one side of the second lens group 122 and movably mounted in the bracket 110.

[0075] Meanwhile, the second lens group 122 and the third lens group 123 may be connected to the lens guiding unit 130 to move in the Y-axis direction. To this end, the second lens group 122 and the third lens group 123 may respectively have coupling protrusion portions 122a and 123a to be connected to the lens guiding unit 130. Meanwhile, the coupling protrusion portions 122a and 123a may be arranged to pass through the auxiliary guiding holes 113a. As described above, the coupling protrusion portions 122a and 123a are arranged to move along the auxiliary guiding holes 113a, so that the second lens group 122 and the third lens group 123 can be prevented from moving in the Z-axis direction. Therefore, the second lens group 122 and the third lens group 123 can move more stably in the Y-axis direction.

[0076] In addition, at least one of the first lens group 121, the second lens group 122, and the third lens group 123 constituting the lens unit 120 may include a plurality of lenses.

[0077] The lens guiding unit 130 may include a plurality of guiding members 132 disposed on each of two sides of the lens groups 121, 122, and 123 to guide the movement of at least two of the plurality of lens groups 121, 122, and 123, i.e., the lens groups 122 and 123. In other words, the lens guiding unit 130 may be connected to the lens unit 120 to guide the movement of some of the lens groups constituting the lens unit 120 (i.e., the movement of the second lens group 122 and the third lens group 123). The guiding members 132 of the lens guiding unit 130 may include: a first guiding member 132a disposed on one side of each of the second lens group 122 and the third lens group 123; a second guiding member 132b disposed to overlap the first guiding member 132a; a third guiding member 132c disposed on the other side of each of the second lens group 122 and the third lens group 123; and a fourth guiding member 132d disposed to overlap the third guiding member 132c. In addition, the guiding members 132 may have openings such that the second lens group 122 and the third lens group 123 can move smoothly. Details thereof will be described below.

[0078] Meanwhile, the first guiding member 132a may have a first inclined guiding hole 132a1 disposed to be inclined in one direction and a first opening 132a2 disposed adjacent to the first inclined guiding hole 132a1. In addition, the second guiding member 132b may have a second inclined guiding hole 132b1 disposed to face the first opening 132a2 and a second opening 132b2 disposed to face the first inclined guiding hole 132a1. The second inclined guiding hole 132b1 may be disposed to be inclined in another direction opposite to the inclined direction of the first inclined guiding hole 132a1.

[0079] In addition, the third guiding member 132c may have a third inclined guiding hole 132c1 disposed to be inclined in one direction and a third opening 132c2 disposed adjacent to the third inclined guiding hole 132c1. In addition, the fourth guiding member 132d may have a fourth inclined guiding hole 132d1 disposed to face the third opening 132c2 and a fourth opening 132d2 disposed to face the third inclined guiding hole 132c1. The fourth inclined guiding hole 132d1 may be disposed to be inclined in another direction opposite to the inclined direction of the third inclined guiding hole 132c1.

[0080] As an example, the coupling protrusion 122a of the second lens group 122 can pass through the auxiliary guiding hole 113a to be disposed in the first inclined guiding hole 132a1 and the third inclined guiding hole 132c1, and the second opening 132b2 and the fourth opening 132d2. Therefore, the coupling protrusion 122a can move along the first inclined guiding hole 132a1 and the third inclined guiding hole 132c1 according to the ascending and descending of the first guiding member 132a and the third guiding member 132c, while moving along the auxiliary guiding hole 113a, and the coupling protrusion 122a can be disposed in the second opening 132b2 and the fourth opening 132d2 such that the coupling protrusion 122a can be free from the interference of the second guiding member 132b and the fourth guiding member 132d. Therefore, the second lens group 122 can move more stably. In other words, the second lens group 122 can move smoothly in the longitudinal direction of the bracket 110 (i.e., only in the Y-axis direction) without being interfered by the second guiding member 132b and the fourth guiding member 132d.

[0081] In addition, the coupling protrusion 123a of the third lens group 123 can pass through the auxiliary guiding hole 113a to be disposed in the second inclined guiding hole 132b1 and the fourth inclined guiding hole 132d1, and the first opening 132a2 and the third opening 132c2. Therefore, the coupling protrusion 123a can move along the second inclined guiding hole 132b1 and the fourth inclined guiding hole 132d1 according to the ascending and descending of the second guiding member 132b and the fourth guiding member 132d, while moving along the auxiliary guiding hole 113a, and the coupling protrusion 123a can be disposed in the first opening 132a2 and the third opening 132c2 such that the coupling protrusion 123a can be free from the interference of the first guiding member 132a and the third guiding member 132c. Therefore, the third lens group 123 can move more stably. In other words, the third lens group 123 can move smoothly in the longitudinal direction of the bracket 110 (i.e., only in the Y-axis direction) without being interfered by the first guiding member 132a and the third guiding member 132c.

[0082] In addition, both ends of each of the first to fourth guide members 132a, 132b, 132c, and 132d may include connection clips 132a4, 132b4, 132c4, and 132d4. The connection clips 132a4, 132b4, 132c4, and 132d4 are arranged to prevent separation from the bracket 110 and are connected to the drive wire 140. For example, the connection clips 132a4, 132b4, 132c4, and 132d4 may have a structure forming a connection hole or a partial hole, and the end of the drive wire 140 may be inserted into the connection hole or the partial hole to connect the first to fourth guide members 132a, 132b, 132c, and 132d to the drive wire 140. For example, the connection clips 132a4, 132b4, 132c4, and 132d4 may extend in a direction toward the bracket 110 or toward the cover member 150 to prevent separation from the bracket 110. The connection clips 132a4, 132b4, 132c4, and 132d4 may be hooks, claws, eyelets, curled portions, molded portions, other types of fasteners, etc., or a combination thereof. As an example, two vertically arranged connection clips 132a4, 132b4, 132c4, and 132d4 may be provided at one end of each of the first to fourth guide members 132a, 132b, 132c, and 132d. The connection clip 132a4 of the first guide member 132a and the connection clip 132c4 of the third guide member 132c may be supported by both ends of the bracket 110, and the connection clip 132b4 of the second guide member 132b and the connection clip 132d4 of the fourth guide member 132d may be supported by both ends of the cover member 150.

[0083] Meanwhile, each of the first guide member 132a and the third guide member 132c may be connected to the second lens group 122 to guide the movement of the second lens group 122, and each of the second guide member 132b and the fourth guide member 132d may be connected to the third lens group 123 to guide the movement of the third lens group 123.

[0084] In other words, each of the movable lens groups 122 and 123 may be respectively connected to the first guide member 132a and the third guide member 132c and the second guide member 132b and the fourth guide member 132d, which are pairs of guide members provided on both sides of the bracket 110. A plurality of pairs of guide members corresponding to the number of movable lens groups may be configured. Although the case where the number of the movable lens groups 122 and 123 is two has been described in the present exemplary embodiment, when the number of the movable lens groups increases, the number of the guide members may increase.

[0085] As described above, the second lens group 122 and the third lens group 123 can be moved by the first guide member 132a and the third guide member 132c and the second guide member 132b and the fourth guide member 132d, respectively, which are a pair of guide members, so that the operations of each of the second lens group 122 and the third lens group 123 can be adjusted more freely.

[0086] The drive wires 140 can generate a driving force for moving the lens unit 120. As an example, four or more drive wires 140 can be connected to each guide member 132, and the drive wires 140 can be formed of a shape memory alloy.

[0087] The drive wires 140 can include: a first drive wire 140a and a second drive wire 140b, which are arranged to cross each other at the upper end of the first guide member 132a, and one end of each is connected to the upper end of the first guide member 132a; and a third drive wire 140c and a fourth drive wire 140d, which are arranged to cross each other below the first drive wire 140a and the second drive wire 140b, and one end of each is connected to the lower end of the first guide member 132a.

[0088] In addition, the drive wires 140 can include: a fifth drive wire 140e and a sixth drive wire 140f, which are arranged to cross each other at the upper end of the second guide member 132b, and one end of each is connected to the upper end of the second guide member 132b; and a seventh drive wire 140g and an eighth drive wire 140h, which are arranged to cross each other below the fifth drive wire 140e and the sixth drive wire 140f, and one end of each is connected to the lower end of the second guide member 132b.

[0089] In addition, the drive wires 140 can include: a ninth drive wire 140i and a tenth drive wire 140j, which are arranged to cross each other at the upper end of the third guide member 132c, and one end of each is connected to the upper end of the third guide member 132c; and an eleventh drive wire 140k and a twelfth drive wire 140l, which are arranged to cross each other below the ninth drive wire 140i and the tenth drive wire 140j, and one end of each is connected to the lower end of the third guide member 132c.

[0090] In addition, the drive wires 140 can include: a thirteenth drive wire 140m and a fourteenth drive wire 140n, which are arranged to cross each other at the upper end of the fourth guide member 132d, and one end of each is connected to the upper end of the fourth guide member 132d, and a fifteenth drive wire 140o and a sixteenth drive wire 140p, which are arranged to cross each other below the thirteenth drive wire 140m and the fourteenth drive wire 140n, and one end of each is connected to the lower end of the fourth guide member 132d.

[0091] Meanwhile, one end of the first driving wire 140a to the sixteenth driving wire 140p may be connected to the connection clips 132a4, 132b4, 132c4, and 132d4 of the guiding member 132, and the other end of the first driving wire 140a to the sixteenth driving wire 140p may be connected to the mounting rod 111c of the bracket 110.

[0092] As described above, the first guiding member 132a to the fourth guiding member 132d may rise and fall according to the extension and contraction of the driving wire 140 formed of a shape memory alloy, and thus the second lens group 122 and the third lens group 123 of the lens unit 120 may move in the Y-axis direction within the bracket 110.

[0093] The cover member 150 may be coupled to the front and rear surfaces of the bracket 110 and may have a plate shape. As an example, both ends of the cover member 150 may contact the connection clips 132b4 and 132d4 of the second guiding member 132b and the fourth guiding member 132d, and may be used to guide the rise and fall of the second guiding member 132b and the fourth guiding member 132d. Additionally, the cover member 150 may have a protrusion portion 152 for reducing the contact area with each of the second guiding member 132b and the fourth guiding member 132d when the second guiding member 132b and the fourth guiding member 132d rise and fall.

[0094] As described above, the moving distance of each of the second lens group 122 and the third lens group 123 may be increased, thereby preventing image quality degradation in the high magnification zoom function.

[0095] In addition, the second lens group 122 and the third lens group 123 may be moved by the driving wire 140, thereby miniaturizing and thinning the lens module 100.

[0096] In addition, the movement of the second lens group 122 and the third lens group 123 may be guided by the auxiliary guiding member 113 of the bracket 110 and the lens guiding unit 130, thereby enabling the second lens group 122 and the third lens group 123 to move stably.

[0097] In addition, the second lens group 122 and the third lens group 123 may move more smoothly through the openings provided in the guiding member 132.

[0098] In addition, the lens guiding unit 130 may move vertically through the driving wire 140 to move the second lens group 122 and the third lens group 123 in the light incident direction. Therefore, the moving distance of each of the second lens group 122 and the third lens group 123 may be sufficiently ensured by the driving wire 140 formed of a shape memory alloy with a limited displacement, thereby preventing degradation of the image quality in the high magnification zoom function.

[0099] Hereinafter, the operation of the lens module according to one or more exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0100] Figures 5 to 18 It is a diagram for describing the operation of the lens module according to one or more exemplary embodiments of the present disclosure.

[0101] First, reference will be made to Figures 5 to 10 describe the operation of the lens module when performing autofocus. As Figure 5 and Figure 6 shown, when no power is supplied to the driving line 140, the lower surface of the first guiding member 132a may be disposed adjacent to the bottom plate 111 of the bracket 110, and the upper surface of the second guiding member 132b may be disposed adjacent to or in contact with the cover plate 112 of the bracket 110. Additionally, in this case, the second lens group 122 may be disposed adjacent to the first lens group 121 (see Figure 4 ). Additionally, the coupling protrusion 122a of the second lens group 122 may pass through the auxiliary guiding hole 113a of the auxiliary guiding member 113, may be disposed at one end of the first inclined guiding hole 132a1 of the first guiding member 132a, and the distal end of the coupling protrusion 122a of the second lens group 122 may be disposed in the second opening 132b2 of the second guiding member 132b. Additionally, the coupling protrusion 123a of the third lens group 123 may pass through the auxiliary guiding hole 113a of the auxiliary guiding member 113, may be disposed at one end of the second inclined guiding hole 132b1 of the second guiding member 132b, and may be disposed in the first opening 132a2 of the first guiding member 132a.

[0102] Thereafter, when power is supplied to each of the fifth driving line 140e to the eighth driving line 140h in the driving line 140, the fifth driving line 140e and the sixth driving line 140f may be stretched, and the seventh driving line 140g and the eighth driving line 140h may be contracted. Accordingly, the second guiding member 132b may move downward, and the first guiding member 132a may be held in the original position. Thereafter, as Figure 7 and Figure 8As shown, the second guiding member 132b may be disposed at the central portion of the bracket 110, that is, at the central portion of the bracket 110 in the Z-axis direction. In this case, the coupling protrusion 123a of the third lens group 123 may be disposed at the central portion of the second inclined guiding hole 132b1 of the second guiding member 132b. Additionally, when the third lens group 123 moves, the coupling protrusion 123a of the third lens group 123 may move along the auxiliary guiding hole 113a of the auxiliary guiding member 113. Meanwhile, the second opening 132b2 may be disposed in the second guiding member 132b such that even when the second guiding member 132b descends, the second guiding member 132b is not interfered with by the coupling protrusion 122a of the second lens group 122.

[0103] Thereafter, when power is continuously supplied to the driving wire 140, the fifth driving wire 140e and the sixth driving wire 140f may be continuously extended, and the seventh driving wire 140g and the eighth driving wire 140h may be continuously contracted. Thus, as Figure 9 and Figure 10 shown, the lower surface of the second guiding member 132b may be disposed adjacent to the bottom plate 111 of the bracket 110, and the first guiding member 132a and the second guiding member 132b may be disposed to overlap each other. In this case, the coupling protrusion 123a of the third lens group 123 may be disposed at the other end of the second inclined guiding hole 132b1 of the second guiding member 132b and may be disposed at the distal end of the auxiliary guiding hole 113a of the auxiliary guiding member 113. Additionally, the second opening 132b2 may be disposed in the second guiding member 132b such that even when the second guiding member 132b continuously descends, the second guiding member 132b is not interfered with by the coupling protrusion 122a of the second lens group 122.

[0104] As described above, the second opening 132b2 may be disposed in the second guiding member 132b such that when the second guiding member 132b ascends and descends, the second guiding member 132b is not interfered with by the coupling protrusion 122a of the second lens group 122. Additionally, the coupling protrusion 123a of the third lens group 123 may pass through the auxiliary guiding hole 113a of the auxiliary guiding member 113 and may move along the auxiliary guiding hole 113a, thereby preventing the third lens group 123 from moving in the Z-axis direction.

[0105] Meanwhile, although the operation of the second guiding member 132b has been described above, the fourth guiding member 132d may also operate in the same manner as the second guiding member 132b. Additionally, the thirteenth driving wire 140m to the sixteenth driving wire 140p connected to the fourth guiding member 132d may also operate in the same manner as the fifth driving wire 140e to the eighth driving wire 140h.

[0106] Hereinafter, the operation of the lens module during zooming will be described.

[0107] First, as Figure 5 and Figure 6 shown, when no power is supplied to the driving wire 140, the lower surface of the first guiding member 132a can be set adjacent to the bottom plate 111 of the bracket 110, and the upper surface of the second guiding member 132b can be set adjacent to or in contact with the cover plate 112 of the bracket 110. Additionally, in this case, the second lens group 122 can be set adjacent to the first lens group 121 (see Figure 4 ).

[0108] Thereafter, when power is supplied to each of the first driving wire 140a to the fourth driving wire 140d in the driving wire 140, the first driving wire 140a and the second driving wire 140b can be contracted, and the third driving wire 140c and the fourth driving wire 140d can be extended. Thus, the first guiding member 132a can move upward, and the second guiding member 132b can be held in the original position. Therefore, the second lens group 122 can be separated from the first lens group 121. Thereafter, as Figure 11 and Figure 12 shown, the first guiding member 132a can be set in the central portion of the bracket 110, that is, the central portion of the bracket in the Z-axis direction. In this case, the coupling protrusion 122a of the second lens group 122 can be set in the central portion of the first inclined guiding hole 132a1 of the first guiding member 132a. Additionally, when the second lens group 122 moves, the coupling protrusion 122a of the second lens group 122 can move along the auxiliary guiding hole 113a of the auxiliary guiding member 113. Meanwhile, the first opening 132a2 can be set in the first guiding member 132a such that even when the first guiding member 132a rises, the first guiding member 132a is not interfered with by the coupling protrusion 123a of the third lens group 123.

[0109] Thereafter, when power is continuously supplied to the driving wire 140, the first driving wire 140a and the second driving wire 140b can be continuously contracted, and the third driving wire 140c and the fourth driving wire 140d can be continuously extended. Thus, as Figure 13 and Figure 14As shown, the upper surface of the first guiding member 132a can be arranged to be adjacent to the cover plate 112 of the bracket 110, and the first guiding member 132a and the second guiding member 132b can be arranged to overlap each other. In this case, the coupling protrusion 122a of the second lens group 122 can be arranged at the other end of the first inclined guiding hole 132a1 of the first guiding member 132a, and can be arranged at the central portion of the auxiliary guiding hole 113a of the auxiliary guiding member 113. In addition, a first opening 132a2 can be arranged in the first guiding member 132a such that even when the first guiding member 132a continuously moves up and down, the first guiding member 132a will not be interfered with by the coupling protrusion 123a of the third lens group 123.

[0110] Meanwhile, although the operation of the first guiding member 132a has been described above, the third guiding member 132c can also operate in the same manner as the first guiding member 132a. In addition, the ninth driving wire 140i to the twelfth driving wire 140l connected to the third guiding member 132c can also operate in the same manner as the first driving wire 140a to the fourth driving wire 140d.

[0111] Hereinafter, the operation of the lens module when zooming and autofocusing are performed simultaneously will be described.

[0112] As Figure 5 and Figure 6 shown, when no power is supplied to the driving wire 140, the lower surface of the first guiding member 132a can be arranged to be adjacent to the bottom plate 111 of the bracket 110, and the upper surface of the second guiding member 132b can be arranged to be adjacent to or in contact with the cover plate 112 of the bracket 110. In addition, in this case, the second lens group 122 can be arranged to be adjacent to the first lens group 121 (see Figure 4 ). In addition, the coupling protrusion 122a of the second lens group 122 and the coupling protrusion 123a of the third lens group 123 can pass through the auxiliary guiding hole 113a of the auxiliary guiding member 113, and can be respectively arranged at one end of the first inclined guiding hole 132a1 of the first guiding member 132a and the second inclined guiding hole 132b1 of the second guiding member. In addition, the coupling protrusion 122a of the second lens group 122 can be arranged in the second opening 132b2 of the second guiding member 132b, and the coupling protrusion 123a of the third lens group 123 can be arranged in the first opening 132a2 of the first guiding member 132a.

[0113] Thereafter, when power is supplied to the driving wire 140, the first driving wire 140a and the second driving wire 140b can be contracted, and the third driving wire 140c and the fourth driving wire 140d can be extended. Accordingly, the first guiding member 132a can move upward. In addition, the fifth driving wire 140e and the sixth driving wire 140f can be extended, and the seventh driving wire 140g and the eighth driving wire 140h can be contracted. Accordingly, the second guiding member 132b can move downward. Thereafter, as Figure 15 and Figure 16 shown, the first guiding member 132a and the second guiding member 132b can be arranged to overlap each other at the same height. In this case, the coupling protrusion 122a of the second lens group 122 and the coupling protrusion 123a of the third lens group 123 can be respectively arranged at the central portions of the first inclined guiding hole 132a1 of the first guiding member 132a and the second inclined guiding hole 132b1 of the second guiding member 132b. In addition, the coupling protrusion 122a of the second lens group 122 and the coupling protrusion 123a of the third lens group 123 can move along the auxiliary guiding hole 113a of the auxiliary guiding member 113.

[0114] Meanwhile, the first opening 132a2 can be provided in the first guiding member 132a such that the first guiding member 132a is not interfered with by the coupling protrusion 123a of the third lens group 123 even when the first guiding member 132a rises. In addition, the second opening 132b2 can be provided in the second guiding member 132b such that the second guiding member 132b is not interfered with by the coupling protrusion 122a of the second lens group 122 even when the second guiding member 132b descends.

[0115] Thereafter, when power is continuously supplied to the driving wire 140, the first driving wire 140a and the second driving wire 140b can be continuously contracted, and the third driving wire 140c and the fourth driving wire 140d can be continuously extended. In addition, the fifth driving wire 140e and the sixth driving wire 140f can be continuously extended, and the seventh driving wire 140g and the eighth driving wire 140h can be continuously contracted. Accordingly, as Figure 17 and Figure 18As shown, the lower surface of the second guiding member 132b can be arranged to be adjacent to the bottom plate 111 of the bracket 110, and the upper surface of the first guiding member 132a can be arranged to be adjacent to or in contact with the cover plate 112 of the bracket 110. In this case, the coupling protrusions 122a of the second lens group 122 and the coupling protrusions 123a of the third lens group 123 can be respectively arranged at the other ends of the first inclined guiding holes 132a1 of the first guiding member 132a and the second inclined guiding holes 132b1 of the second guiding member 132b. In addition, the coupling protrusions 122a of the second lens group 122 and the coupling protrusions 123a of the third lens group 123 can move along the auxiliary guiding holes 113a of the auxiliary guiding member 113.

[0116] In addition, a first opening 132a2 can be arranged in the first guiding member 132a such that even when the first guiding member 132a continuously rises, the first guiding member 132a will not be interfered with by the coupling protrusion 123a of the third lens group 123. In addition, a second opening 132b2 can be arranged in the second guiding member 132b such that even when the second guiding member 132b continuously descends, the second guiding member 132b will not be interfered with by the coupling protrusion 122a of the second lens group 122.

[0117] As described above, the coupling protrusions 122a of the second lens group 122 and the coupling protrusions 123a of the third lens group 123 can pass through the auxiliary guiding holes 113a of the auxiliary guiding member 113 and can move along the auxiliary guiding holes 113a, thereby preventing the second lens group 122 and the third lens group 123 from moving in the Z-axis direction. In addition, the first opening 132a2 and the second opening 132b2 can be respectively arranged in the first guiding member 132a and the second guiding member 132b such that when the second lens group 122 and the third lens group 123 move, interference between the coupling protrusion 122a and the second guiding member 132b and interference between the coupling protrusion 123a and the first guiding member 132a can be prevented.

[0118] Meanwhile, although the operations of each of the first guiding member 132a and the second guiding member 132b have been described above, the third guiding member 132c and the fourth guiding member 132d can also operate in the same manner as the first guiding member 132a and the second guiding member 132b. In other words, the first guiding member 132a and the third guiding member 132c can operate in the same manner, and the second guiding member 132b and the fourth guiding member 132d can operate in the same manner. In addition, the ninth driving wires 140i to the sixteenth driving wires 140p connected to the third guiding member 132c and the fourth guiding member 132d can also operate in the same manner as the first driving wires 140a to the eighth driving wires 140h.

[0119] As described above, the second lens group 122 and the third lens group 123 can move in the longitudinal direction of the bracket 110 (i.e., the Y-axis direction), so that the moving distance of each of the second lens group 122 and the third lens group 123 can be increased. As a result, deterioration of image quality in the high magnification zoom function can be prevented.

[0120] In addition, the second lens group 122 and the third lens group 123 can be moved by the driving wire 140, so that the lens module 100 can be miniaturized and thinned.

[0121] In addition, the movement of the second lens group 122 and the third lens group 123 can be guided by the auxiliary guiding member 113 and the lens guiding unit 130, so that the second lens group 122 and the third lens group 123 can move stably.

[0122] In addition, when the second lens group 122 and the third lens group 123 move through the openings provided in the guiding member 132, interference between the coupling protrusions 122a of the second lens group 122 and the coupling protrusions 123a of the third lens group 123 and the guiding member 132 can be prevented.

[0123] In addition, the lens guiding unit 130 can move vertically through the driving wire 140 so that the second lens group 122 and the third lens group 123 move in the light incident direction. Therefore, the moving distance of each of the second lens group 122 and the third lens group 123 can be sufficiently ensured by the driving wire 140 formed of a shape memory alloy with a limited displacement, thereby preventing deterioration of image quality in the high magnification zoom function.

[0124] As described above, according to the exemplary embodiments in the present disclosure, the lens can move more smoothly.

[0125] Although specific exemplary embodiments have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail can be made to these examples without departing from the substance and scope of the claims and their equivalents. The examples described herein will be considered only as descriptive and not for the purpose of limitation. The description of the features or aspects in each example will be considered applicable to similar features or aspects in other examples. Suitable results can be obtained if the described techniques are performed in a different order, and / or if the 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 is not defined by the detailed description, but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents will be construed as being included in the present disclosure.

Claims

1. A lens module, comprising: A bracket having an internal space; A lens unit including a lens group and mounted in the bracket such that at least two movable lens groups in the lens group can move independently in the longitudinal direction of the bracket, and at least one lens group in the lens group includes a plurality of lenses; A guiding unit including guiding members provided on two sides of the lens group to guide the movement of the movable lens group; And A driving wire connected to each of the guiding members and formed of a shape memory alloy, wherein each of the movable lens groups is connected to a pair of guiding members provided on both sides of the bracket, The guiding member includes: a first guiding member provided on one side of the lens group; a second guiding member provided to overlap the first guiding member; a third guiding member provided on the other side of the lens group; and a fourth guiding member provided to overlap the third guiding member, and Each of the first guiding member to the fourth guiding member guides the movement of the movable lens group when rising and falling in a direction perpendicular to the longitudinal direction of the bracket.

2. The lens module according to claim 1, wherein, The guiding members are provided in pairs corresponding to the number of the movable lens groups.

3. The lens module according to claim 1, wherein, The bracket includes an auxiliary guiding member having an auxiliary guiding hole and provided on at least one side of the lens group, and the auxiliary guiding hole is provided parallel to the moving direction of the movable lens group to guide the movement of the movable lens group.

4. The lens module according to claim 3, wherein, The first guiding member has a first inclined guiding hole provided to be inclined in one direction; And the second guiding member has a second inclined guiding hole provided to be spaced apart from the first inclined guiding hole and provided to be inclined in another direction opposite to the inclined direction of the first inclined guiding hole, and wherein the first guiding member has a first opening provided to face the second inclined guiding hole, and the second guiding member has a second opening provided to face the first inclined guiding hole.

5. The lens module according to claim 3, wherein, The third guiding member has a third inclined guiding hole provided to be inclined in one direction; And the fourth guiding member has a fourth inclined guiding hole provided to be spaced apart from the third inclined guiding hole and provided to be inclined in another direction opposite to the inclined direction of the third inclined guiding hole, and wherein the third guiding member has a third opening provided to face the fourth inclined guiding hole, and the fourth guiding member has a fourth opening provided to face the third inclined guiding hole.

6. The lens module according to claim 4, wherein, Each of the movable lens groups includes a coupling protrusion passing through the auxiliary guiding hole, and the coupling protrusion is provided in the first inclined guiding hole and the second opening or provided in the second inclined guiding hole and the first opening, and the first opening and the second opening are provided to face the second inclined guiding hole and the first inclined guiding hole respectively.

7. The lens module according to claim 3, wherein, The driving wire includes: The first drive line and the second drive line are arranged to cross each other at the upper end of the first guiding member, and one end of each is connected to the upper end of the first guiding member; and the third drive line and the fourth drive line are arranged to cross each other below the first drive line and the second drive line, and one end of each is connected to the lower end of the first guiding member; The fifth drive line and the sixth drive line are arranged to cross each other at the upper end of the second guiding member, and one end of each is connected to the upper end of the second guiding member; and the seventh drive line and the eighth drive line are arranged to cross each other below the fifth drive line and the sixth drive line, and one end of each is connected to the lower end of the second guiding member; The ninth drive line and the tenth drive line are arranged to cross each other at the upper end of the third guiding member, and one end of each is connected to the upper end of the third guiding member; and the eleventh drive line and the twelfth drive line are arranged to cross each other below the ninth drive line and the tenth drive line, and one end of each is connected to the lower end of the third guiding member; and The thirteenth drive line and the fourteenth drive line are arranged to cross each other at the upper end of the fourth guiding member, and one end of each is connected to the upper end of the fourth guiding member; and the fifteenth drive line and the sixteenth drive line are arranged to cross each other below the thirteenth drive line and the fourteenth drive line, and one end of each is connected to the lower end of the fourth guiding member.

8. The lens module according to claim 3, wherein, The bracket includes a bottom plate and a cover plate arranged to face the bottom plate, and each of the bottom plate and the cover plate includes a mounting portion on which a mounting rod is mounted, and the end of the drive line is connected to the mounting rod.

9. The lens module according to claim 8, wherein, One end of each drive line is connected to a corresponding connection hole provided in one of the first guiding member to the fourth guiding member, and the other end of the drive line is connected to a corresponding mounting rod.

10. The lens module according to claim 3, wherein, The lens group includes: A first lens group fixedly mounted on one side of the bracket; A second lens group provided behind the first lens group and movable in the light incident direction; and A third lens group provided behind the second lens group and movable.

11. The lens module according to claim 10, wherein, The second lens group is connected to the first guiding member and the third guiding member, and can move in the length direction of the bracket according to the rising and falling of the first guiding member and the third guiding member, and wherein, the third lens group is connected to the second guiding member and the fourth guiding member, and can move in the length direction of the bracket according to the rising and falling of the second guiding member and the fourth guiding member.

12. The lens module according to claim 11, wherein, The second lens group has a coupling protrusion portion arranged to pass through an auxiliary guiding hole of an auxiliary guiding member provided in the bracket, and wherein, the third lens group has a coupling protrusion portion arranged to pass through the auxiliary guiding hole of the auxiliary guiding member provided in the bracket.

13. The lens module according to claim 3, wherein, The auxiliary guiding member is detachably mounted to the bracket.

14. The lens module according to claim 1, further comprising a cover member, the cover member being coupled to the bracket to be disposed on two sides of the lens group.

15. The lens module according to claim 14, wherein, Each of the cover members includes a protruding portion for reducing the contact area with the guide member when the guide member moves up and down.

16. A camera module, comprising: A reflection module configured to change the path of incident light; and The light whose path is changed by the reflection module in the lens module according to claim 1 passes through the lens module.

17. A portable electronic device, comprising: A front main surface and a rear main surface facing each other in the thickness direction of the portable electronic device; and Two or more camera modules, one or more of the two or more camera modules being the camera module according to claim 16, wherein the lens group of one or more camera modules according to claim 16 is disposed along an optical axis perpendicular to the thickness direction.

18. A lens module, comprising: A bracket; A lens group disposed in the bracket and movable relative to the bracket in the optical axis direction; A guide member disposed on the opposite side of the bracket connected to the lens group; and A drive wire formed of a shape memory alloy and connected to the bracket and the guide member to drive the guide member in a direction intersecting the optical axis direction, wherein, in response to driving the guide member in a direction intersecting the optical axis direction, the lens group moves in the optical axis direction, The guide member includes: a first guide member disposed on one side surface of the lens group; a second guide member disposed to overlap the first guide member; a third guide member disposed on the other side surface of the lens group; and a fourth guide member disposed to overlap the third guide member, and Each of the first to fourth guide members guides the movement of the movable lens group when moving up and down in a direction perpendicular to the optical axis direction.

Images