Camera actuator

Abstract

A camera actuator according to an embodiment of the present invention comprises: a housing; a first lens assembly fixed to one side of the housing; and a second lens assembly and a third lens assembly which move in a first direction parallel to the optical axis inside the housing, wherein the first lens assembly, the second lens assembly, and the third lens assembly each comprise: a lens group including a plurality of lenses arranged in the first direction; a barrel part including a long axis and a short axis, and surrounding the lens group; and a protrusion part extending from the barrel part toward the inside that is perpendicular to the first direction, so as to be in contact with the lens group.

Description

camera actuator

[0001] The present invention relates to a camera actuator.

[0002] A camera is a device that captures images or videos of a subject, and is installed in portable devices, drones, vehicles, etc.

[0003] A camera device or camera module may have an image stabilization (IS) function to correct or prevent shaking caused by the user's movement in order to improve the quality of the image, an auto focusing (AF) function to automatically adjust the distance between the image sensor and the lens to align the focal length of the lens, and a zooming function to increase or decrease the magnification of a distant subject and take pictures using a zoom lens.

[0004] At this time, in order to perform a zooming function, the optical performance improves as the diameter of the lens closest to the object among multiple lens assemblies increases, but there may be a problem in that it is difficult to secure a sufficient diameter of the lens closest to the object during the process of arranging the lenses inserted into the barrel.

[0005] In addition, there is a problem that a flare phenomenon occurs in the process of transmitting light through a lens assembly composed of multiple lenses, which is reflected from the surface of one of the lenses and moves toward the sensor unit. The flare described above can be prevented by increasing the distance between the lens closest to the object and the lens placed next to it through a spacer.

[0006] The spacer, which is placed between lenses to prevent flare, may cause a problem in that some of the light passing through the lens is not transmitted to the next lens by the spacer as it moves to the sensor unit, which may result in a problem of reduced image resolution.

[0007] However, to solve this problem, the thickness of the spacer must be adjusted, but there is a problem in that the thickness of the spacer cannot be adjusted due to physical limitations.

[0008] The present invention is an invention devised to solve the problems of the above-described prior art, and has as its object the securing of relative illumination (RI) while preventing flare.

[0009] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below.

[0010] According to an embodiment of the present invention for achieving the above-described object, a camera actuator includes a housing, a first lens assembly fixed to one side of the housing, and a second lens assembly and a third lens assembly that move along a first direction parallel to an optical axis inside the housing, wherein the first lens assembly, the second lens assembly, and the third lens assembly each include a lens group including a plurality of lenses arranged in the first direction, a barrel portion surrounding the lens group, and a protrusion portion extending inwardly from the barrel portion perpendicular to the first direction and coming into contact with the lens group.

[0011] The barrel portion includes a major axis and a minor axis perpendicular to the first direction, and a first length from the outer surface of the barrel portion to the inner surface of the protrusion in a second direction parallel to the major axis of the barrel portion may be greater than a second length from the outer surface of the barrel portion to the inner surface of the protrusion in a third direction parallel to the minor axis of the barrel portion.

[0012] The protrusion of any one of the first lens assembly, the second lens assembly, and the third lens assembly may be disposed between the plurality of lenses in the first direction and may include a first surface and a second surface that contact the plurality of lenses in the first direction.

[0013] The first surface is in contact with one of the plurality of lenses in the first direction, the second surface is in contact with another of the plurality of lenses in the first direction, and the inner diameter of the protrusion can decrease in the first direction from one of the plurality of lenses toward the other of the plurality of lenses.

[0014] The bottom surface of any of the lenses in the first direction may include a non-contact area that does not come into contact with the first surface.

[0015] The protrusion may include a first region in which the inner diameter in the second direction and the inner diameter in the third direction are different from each other, and a second region in which the inner diameter in the second direction and the inner diameter in the third direction are the same.

[0016] The first region and the second region are arranged in the first direction, and the first region can be arranged adjacent to one of the lenses.

[0017] A portion of the inner surface of the first region of the protrusion in the third direction may be coplanar with a portion of the inner surface of the barrel portion.

[0018] The barrel portion of the first lens assembly includes a third region and a fourth region spaced apart from the protrusion in the first direction, and one lens that contacts the first surface in the first direction may be arranged in the third region, and the other lens that contacts the second surface in the first direction may be arranged in the fourth region.

[0019] The lens group of the first lens assembly may further include another lens, and the another lens may be positioned further from the protrusion in the first direction than the other lens.

[0020] It may further include a film portion disposed between the other lens and the further lens in the first direction.

[0021] The protrusion extends inwardly from the end region of the barrel portion in the first direction to contact the lens group in the first direction, and a maximum length in a direction perpendicular to the first direction of any one of the plurality of lenses that contacts the protrusion in the first direction may be smaller than a maximum length in a direction perpendicular to the first direction of another lens that is arranged relatively far from the protrusion in the first direction.

[0022] At least one of the first lens assembly, the second lens assembly and the third lens assembly may have a different direction in which one lens adjacent to the protrusion in the first direction faces the other lens that is disposed relatively farthest from the protrusion.

[0023] The above barrel portion includes a major axis and a minor axis perpendicular to the first direction, and an inner diameter of the protrusion in a second direction parallel to the major axis and an inner diameter of the protrusion in a third direction parallel to the minor axis may decrease in a direction toward the lens group in the first direction in contact with the protrusion.

[0024] The first lens assembly includes a first lens group, a first barrel portion, and a first protrusion, the second lens assembly includes a second lens group, a second barrel portion, and a second protrusion, and the third lens assembly includes a third lens group, a third barrel portion, and a third protrusion, wherein the first protrusion is formed in an end region of the first barrel portion adjacent to the second lens assembly in the first direction, and the second protrusion and the third protrusion can be arranged to face each other in the first direction.

[0025] The first barrel portion may include a major axis and a minor axis perpendicular to the first direction, and the first protrusion may have different minimum inner diameters in a second direction parallel to the major axis and in a third direction parallel to the minor axis.

[0026] The maximum inner diameter of the first protrusion in the second direction may be greater than the maximum length in the second direction of any one lens in the first lens group that contacts the first protrusion in the first direction, and may be smaller than the maximum length in the second direction of another lens that is arranged furthest from the first protrusion in the first direction.

[0027] The minimum inner diameter of the first protrusion in the second direction may be smaller than the maximum length of any one lens in contact with the first protrusion in the first direction in the second direction.

[0028] The first lens group includes a first lens arranged furthest from the first protrusion in the first direction, a second lens in contact with the first protrusion in the first direction, and a third lens arranged between the first lens and the second lens in the first direction, and a maximum length of the second lens in a fourth direction between the second direction and the third direction may be less than a maximum length of the first lens and the third lens in the fourth direction.

[0029] The inner diameter of the first protrusion in the third direction may be smaller than the lengths of the first lens, the second lens, and the third lens in the third direction.

[0030] The second protrusion may be formed in an end region of the second barrel portion adjacent to the third lens assembly in the first direction, and the third protrusion may be formed in an end region of the third barrel portion adjacent to the second lens assembly in the first direction.

[0031] The second lens group includes a fourth lens arranged furthest from the second protrusion in the first direction and a fifth lens in contact with the second protrusion in the first direction, and an inner diameter of the second protrusion in the second direction may be smaller than the lengths of the fourth lens and the fifth lens in the second direction.

[0032] The third lens group includes a sixth lens arranged furthest from the third protrusion in the first direction and a seventh lens in contact with the third protrusion in the first direction, and an inner diameter of the third protrusion in the second direction may be smaller than the lengths of the sixth lens and the seventh lens in the second direction.

[0033] A camera actuator according to an embodiment of the present invention for solving the above problem can have the effect of securing relative illumination (RI) while preventing flare.

[0034] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0035] In addition, the effects of the present invention may be described in more detail in the detailed description of the present invention, and may not necessarily be limited to what is presented above.

[0036] The summary set forth above, as well as the detailed description of preferred embodiments of the present application described below, will be better understood when read in conjunction with the accompanying drawings.

[0037] For the purpose of illustrating the present invention, preferred embodiments are shown in the drawings.

[0038] However, it should be understood that the present application is not limited to the precise arrangements and means illustrated.

[0039] FIG. 1 is a drawing illustrating a camera module according to an embodiment of the present invention;

[0040] FIG. 2 is a schematic diagram illustrating a development of a camera module according to an embodiment of the present invention;

[0041] FIG. 3 is a drawing illustrating an optical path of a camera module according to an embodiment of the present invention;

[0042] FIG. 4 is a drawing illustrating the overall configuration of a camera actuator according to an embodiment of the present invention;

[0043] FIG. 5 is a drawing showing a barrel portion of a part of a lens assembly of a camera actuator according to an embodiment of the present invention;

[0044] FIG. 6 is a cross-sectional view from B' to B" of a camera actuator according to an embodiment of the present invention;

[0045] FIG. 7 is a drawing specifically illustrating a first lens group of a camera actuator according to an embodiment of the present invention;

[0046] FIG. 8 is a cross-sectional view from C' to C" of a camera actuator according to an embodiment of the present invention;

[0047] FIG. 9 is a cross-sectional view from D' to D" of a camera actuator according to an embodiment of the present invention;

[0048] FIG. 10 is a drawing illustrating a first lens assembly of a camera actuator according to an embodiment of the present invention;

[0049] FIG. 11 is a drawing illustrating a second lens assembly of a camera actuator according to an embodiment of the present invention;

[0050] FIG. 12 is a drawing illustrating a third lens assembly of a camera actuator according to an embodiment of the present invention;

[0051] FIG. 13 is a drawing illustrating the inner diameter of a protrusion of a camera actuator according to an embodiment of the present invention in the second direction and the third direction;

[0052] FIG. 14 is a cross-sectional view from B' to B" of a camera actuator according to a modified example of the present invention;

[0053] FIG. 15 is a cross-sectional view from C' to C" of a camera actuator according to a modified example of the present invention;

[0054] FIG. 16 is a drawing illustrating a first region and a second region in a B'B" cross-section of a camera actuator according to a modified example of the present invention;

[0055] FIG. 17 is a drawing illustrating a first region and a second region in a C'C" cross-section of a camera actuator according to a modified example of the present invention;

[0056] FIG. 18 is a drawing illustrating the contact between the protrusion of the camera actuator and the first lens according to a modified example of the present invention; and

[0057] FIG. 19 is a drawing illustrating an example of a process for assembling a first lens assembly of a camera actuator according to an embodiment of the present invention.

[0058] The present invention is susceptible to various modifications and embodiments, and specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. In describing the present invention, detailed descriptions of related known technologies will be omitted if they are deemed to obscure the gist of the present invention.

[0059] Terms such as first, second, etc. may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another.

[0060] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0061] Additionally, throughout the specification, when we say "connected," this does not only mean that two or more components are directly connected, but also that two or more components are indirectly connected through other components, that they are electrically connected as well as physically connected, or that they are referred to by different names depending on location or function but are one.

[0062] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," it can include the meaning of a downward direction as well as an upward direction based on one component.

[0063] In addition, when explaining as 'same' or 'similar' based on objects that can be compared numerically or geometrically, such as length, inner diameter, diameter, area, etc., it may mean including cases where there is a range of error. For example, when explaining that the lengths of components A and B are the same, it may be desirable to interpret it to mean that the length of B is included within the range of error of the length of A. This is because it takes into account the range of error that occurs during the injection molding and manufacturing of the device, and because it is a matter that can obviously occur physically, it may be desirable to understand it taking into account the range of error as described above even when explaining as 'same' or 'similar.' In this case, the range of error may range from -5% to +5% of the mentioned number or shape, but this is only an example of the range of error and may not necessarily have a range limited to what was mentioned.

[0064] Hereinafter, preferred embodiments of the present invention, in which the purpose of the present invention can be specifically realized, will be described with reference to the attached drawings 1 to 13.

[0065] Specifically, FIG. 1 is a drawing showing a camera module according to an embodiment of the present invention, FIG. 2 is a drawing showing a schematic development view of a camera module according to an embodiment of the present invention, FIG. 3 is a drawing for explaining an optical path of a camera module according to an embodiment of the present invention, FIG. 4 is a drawing for explaining an overall configuration of a camera actuator according to an embodiment of the present invention, FIG. 5 is a drawing showing a barrel part in some form for explaining a lens assembly of a camera actuator according to an embodiment of the present invention, FIG. 6 is a drawing showing a cross-section from B' to B" of a camera actuator according to an embodiment of the present invention, FIG. 7 is a drawing for specifically explaining a first lens group of a camera actuator according to an embodiment of the present invention, FIG. 8 is a drawing showing a cross-section from C' to C" of a camera actuator according to an embodiment of the present invention, FIG. 9 is a drawing showing a cross-section from D' to D" of a camera actuator according to an embodiment of the present invention, FIG. 10 is a drawing for explaining a first lens assembly of a camera actuator according to an embodiment of the present invention, FIG. 11 is a drawing illustrating a second lens assembly of a camera actuator according to an embodiment of the present invention, FIG. 12 is a drawing illustrating a third lens assembly of a camera actuator according to an embodiment of the present invention, and FIG. 13 is a drawing illustrating an inner diameter of a protrusion of a camera actuator according to an embodiment of the present invention in a second direction and a third direction.

[0066] First, referring to FIGS. 1 and 2, a camera module (1000) according to an embodiment may be composed of a cover (CV), a first camera actuator (A1), a second camera actuator (A2), and a circuit board (B). Here, the first camera actuator (A1) may be used interchangeably as a first actuator, and the second camera actuator (A2) may be used interchangeably as a second actuator.

[0067] The cover (CV) can cover the first camera actuator (A1) and the second camera actuator (A2). The cover (CV) can improve the coupling force between the first camera actuator (A1) and the second camera actuator (A2).

[0068] Furthermore, the cover (CV) may be made of a material that blocks electromagnetic waves. Accordingly, the first camera actuator (A1) and the second camera actuator (A2) within the cover (CV) can be easily protected.

[0069] And the first camera actuator (A1) may be an OIS (Optical Image Stabilizer) actuator. For example, the first camera actuator (A1) may move and tilt the optical member in a direction perpendicular to the optical axis. Here, the optical axis may not mean the axis of incident light incident on the optical member, but rather the optical axis of refracted light refracted by the optical member in a direction from the first camera actuator (A1) toward the second camera actuator (A2). For example, light incident on the first camera actuator (A1) is incident on the optical member in a third direction and refracted by the optical member in the first direction, and the first camera actuator (A1) may tilt the optical member in a direction perpendicular to the optical axis, that is, the optical axis of the refracted light.

[0070] The first camera actuator (A1) may include a fixed focal length lens arranged in a predetermined barrel (not shown). The fixed focal length lens may also be referred to as a “single focal length lens” or “single lens.”

[0071] The first camera actuator (A1) can change the path of light. In an embodiment, the first camera actuator (A1) can change the path of light vertically through an internal optical element (e.g., a prism or mirror). For example, the optical element can change the light from a third direction to the optical axis direction. With this configuration, even if the thickness of the mobile terminal is reduced, a lens configuration larger than the thickness of the mobile terminal can be placed within the mobile terminal through the change in the path of light, thereby performing magnification, auto-focusing (AF), zoom, and OIS functions.

[0072] However, this is not limited to the first camera actuator (A1) and the optical path can be changed vertically or at a predetermined angle multiple times.

[0073] The second camera actuator (A2) may be positioned behind the first camera actuator (A1). The second camera actuator (A2) may be coupled to the first camera actuator (A1). The coupling between the two may be achieved in various ways.

[0074] Additionally, the second camera actuator (A2) may be a zoom actuator or an auto focus (AF) actuator. For example, the second camera actuator (A2) may support one or more lenses and move the lenses according to a control signal from a predetermined control unit to perform an auto focus function or a zoom function.

[0075] And one or more lenses can move independently or individually along the optical axis.

[0076] The circuit board (B) may be positioned behind the second camera actuator (A2). The circuit board (B) may be electrically connected to the second camera actuator (A2) and the first camera actuator (A1). In addition, there may be a plurality of circuit boards (B).

[0077] The camera module (1000) according to the embodiment may be composed of a single or multiple camera modules (1000). For example, the multiple camera modules may include a first camera module and a second camera module.

[0078] A single camera module (1000) may include a single or multiple actuators. For example, a single camera module (1000) may include a first camera actuator (A1) and a second camera actuator (A2). Furthermore, the camera module (1000) may be used interchangeably with various terms such as camera device, imaging device, etc.

[0079] The camera module (1000) is placed in a predetermined case (not shown) and may include an actuator (not shown) capable of driving a lens assembly. This will be described in more detail with reference to the drawings to be described later.

[0080] The actuator may be a voice coil motor, a micro actuator, a silicon actuator, etc., and may be applied in various ways such as an electrostatic method, a thermal method, a bimorph method, an electrostatic force method, etc., but is not limited thereto. In addition, in the present specification, the camera actuator may be referred to as an actuator, etc. In addition, a camera module (1000) composed of a plurality of camera modules may be mounted in various electronic devices such as a mobile terminal. Furthermore, the actuator may be a device that moves or tilts a lens or an optical member. However, below, the actuator is described as a concept including a lens or an optical member. Furthermore, the actuator may be called a 'lens transport device', 'lens transport device', 'optical member transport device', 'optical member moving device', etc.

[0081] Referring to FIG. 3, a camera module according to an embodiment may include a first camera actuator (A1) having an OIS function and a second camera actuator (A2) having a zooming function and an AF function.

[0082] Light can be incident into the camera module (1000) or the first camera actuator (A1) through an opening area located on the upper surface of the first camera actuator (A1). That is, the light is incident into the interior of the first camera actuator (A1) along a third direction along the optical axis direction, and the optical path can be changed vertically through the optical member. Then, the light can pass through the second camera actuator (A2) and be incident on the image sensor (IS) located at one end of the second camera actuator (A2) (PATH).

[0083] Additionally, in the present specification, the inner side may be a direction toward the first camera actuator (A1) from the cover (CV), and the outer side may be a direction opposite to the inner side. For example, the first camera actuator (A1) and the second camera actuator (A2) may be located inside the cover (CV), and the cover (CV) may be located outside the first camera actuator (A1) or the second camera actuator (A2).

[0084] The camera module (1000) according to the embodiment can improve the spatial limitations of the first camera actuator (A1) and the second camera actuator (A2) by changing the light path. The camera module (1000) according to the embodiment can expand the light path while minimizing the thickness of the camera module (1000) in response to the change in the light path. Furthermore, it should be understood that the second camera actuator (A2) can provide a high range of magnification by controlling the focus, etc. in the expanded light path.

[0085] In addition, the camera module (1000) according to the embodiment can implement OIS by controlling the optical path through the first camera actuator (A1), thereby minimizing the occurrence of decenter or tilt phenomena and producing the best optical characteristics.

[0086] Furthermore, the second camera actuator (A2) may include an optical system and a lens driving unit. For example, the second camera actuator (A2) may be configured with at least one of the first lens assembly (200), the second lens assembly (300), and the third lens assembly (400). This will be described in more detail with reference to the drawings below.

[0087] Additionally, the second camera actuator (A2) is equipped with a coil and a magnet to perform high-magnification zooming and autofocus functions.

[0088] For example, the second lens assembly (300) and the third lens assembly (400) may be moving lenses that move through coils, magnets, and guide pins, and the first lens assembly (200) may be a fixed lens, but is not limited thereto. For example, the first lens assembly (200) may perform the function of a focalizer that focuses light at a specific location, and the distance to the subject or the image distance may change significantly depending on the movement of the second lens assembly (300), resulting in a large change in magnification. In addition, the second lens assembly (300), which is a variable magnifier, may play an important role in the change in the focal length or magnification of the optical system. Meanwhile, the image focus formed by the second lens assembly (300), which is a variable magnifier, may have a slight difference depending on the location. Accordingly, the third lens assembly (400) may perform a position compensation function for the image formed by the variable magnifier. For example, the third lens assembly (400) can perform a compensator function that accurately focuses the point imaged by the second lens assembly (300), which is a variable, on the actual image sensor location.

[0089] And the second lens assembly (300) and the third lens assembly (400) can be driven by electromagnetic force due to the interaction between the coil and the magnet. The above-described content can be applied to the lens assembly described later. In addition, the second lens assembly (300) and the third lens assembly (400) can move along the optical axis direction or a first direction parallel to the optical axis direction. And the second lens assembly (300) to the third lens assembly (400) can move in the optical axis direction independently or dependently.

[0090] Furthermore, the first lens assembly (200) may be positioned at the front end of the second lens assembly (300) or the rear end of the third lens assembly (400). That is, the first lens assembly (200) may be positioned adjacent to the first camera actuator or adjacent to the image sensor. In addition, the first lens assembly (200) may be in a fixed state.

[0091] In the present invention, the second lens assembly (300) and the third lens assembly (400) can move along the optical axis direction. In addition, the first lens assembly (200) can be positioned at the front end of the second lens assembly (300) or the rear end of the third lens assembly (400). In addition, the first lens assembly (200) may not move in the optical axis direction. That is, the first lens assembly (200) can be a fixed part. In addition, the second and third lens assemblies can be movable parts.

[0092] Meanwhile, when an actuator for OIS and an actuator for AF / Zoom are arranged according to an embodiment of the present invention, magnetic interference with the magnet for AF / Zoom can be prevented when the OIS is driven. Since the magnet of the first camera actuator (A1) is arranged separately from the second camera actuator (A2), magnetic interference between the first camera actuator (A1) and the second camera actuator (A2) can be prevented. In this specification, OIS can be used interchangeably with terms such as image stabilization, optical image stabilization, optical image correction, and shake correction.

[0093] Before describing the lens assembly (200) according to an embodiment of the present invention, the present invention will be described based on the second camera actuator (A2). This is a limited description to help sufficient understanding of the invention, and may not necessarily be limited to the illustrated second camera actuator (A2).

[0094] In addition, in the detailed description of the present invention, the background and the arrangement relationship specifically combined with the above-described background were mentioned to help sufficient understanding of the invention, but it is not necessarily limited thereto, and it is only to help understanding of the second camera actuator (A2) described in detail through the drawings described later, and should not be interpreted as being limited to what was mentioned.

[0095] Meanwhile, as illustrated in FIG. 4, a second camera actuator (A2) according to an embodiment of the present invention may include a housing (100), a first lens assembly (200), a second lens assembly (300), a third lens assembly (400), a first driving unit (510), and a second driving unit (520).

[0096] Here, the housing (100) can form the exterior of the second camera actuator (A2) according to an embodiment of the present invention, and a space can be formed inside.

[0097] In addition, a second lens assembly (300) and a third lens assembly (400) are positioned inside the housing (100) and are moved along the optical axis direction by the first driving unit (510) and the second driving unit (520), and the first lens assembly (200) can be fixed to the outside of the housing (100).

[0098] At this time, the first lens assembly (200) is fixed to the outside of the housing (100), and a separate cover member may be provided between the first lens assembly (200) and the housing (100), but may not be limited thereto.

[0099] Meanwhile, the second lens assembly (300) and the third lens assembly (400) can be moved along the optical axis direction or a first direction parallel to the optical axis direction by the first driving unit (510) and the second driving unit (520).

[0100] To explain this in detail, the first lens assembly (200) is arranged on one side of the housing (100), and the first lens assembly (200) can be fixed to the housing (100). The first lens assembly (200) can be arranged closer to the first camera actuator (A1) in the first direction than the second lens assembly (300) and the third lens assembly (400). In addition, the first lens assembly (200) can include a first lens group (210) in which a plurality of lenses are arranged in the first direction, and a first barrel portion (220) arranged to surround the first lens group (210). At this time, a detailed description of the first lens assembly (200) will be described in more detail with reference to the drawings to be described later.

[0101] Meanwhile, the second lens assembly (300) is disposed inside the housing (100), and the second lens assembly (200) can be moved along the optical axis direction or the first direction by the first driving unit (510). The second lens assembly (300) can be disposed between the first lens assembly (200) and the third lens assembly (400) in the first direction. In addition, the second lens assembly (300) can include a second lens group (310) in which a plurality of lenses are disposed in the first direction, and a second barrel part (320) disposed to surround the second lens group (310). At this time, a detailed description of the second lens assembly (300) will be described in more detail with reference to the drawings to be described later.

[0102] The third lens assembly (400) is arranged inside the housing (100), and the third lens assembly (400) can be moved along the optical axis direction or the first direction by the second driving unit (520). The third lens assembly (400) is arranged closer to the sensor unit than the first lens assembly (200) and the second lens assembly (300) in the first direction, or alternatively, can be arranged farthest from the object. In addition, the third lens assembly (400) can include a third lens group (410) in which a plurality of lenses are arranged in the first direction, and a third barrel part (420) arranged to surround the third lens group (410). At this time, a detailed description of the third lens assembly (400) will be described in more detail with reference to the drawings to be described later.

[0103] Meanwhile, the first driving unit (510) may include a first coil (511) disposed on one side of the housing (100) in the first direction, a second coil (512), and a first magnet (513) disposed on the second lens assembly (300). Here, a space in which the drive (600) is disposed may be formed below the first coil (511) and the second coil (512) in the first direction. Since the first driving unit (510) is disposed between the first lens assembly (200) and the third lens assembly (400) in the first direction, it is relatively moved to an upper region of the housing (100) in the first direction than the third lens assembly (400), so that the space in which the drive (600) is disposed can be secured by adjusting the lengths of the first coil (511) and the second coil (512). Alternatively, since the second lens assembly (300) moves along the first direction in the internal space of the housing (100) corresponding to the upper side in the first direction based on FIG. 4, and the second lens assembly (300) cannot descend into the space where the third lens assembly (400) is arranged, the lengths of the first coil (511) and the second coil (512) described above can be adjusted to secure a space where the drive (600) is arranged. Alternatively, the drive (600) can overlap at least a portion of the first coil (511) and the second coil (512) in the first direction.

[0104] The second driving unit (520) may include a third coil (521), a fourth coil (522), and a second magnet (523) disposed on the third lens assembly (400) on the other side of the housing (100) in the first direction. Here, the total length of the third coil (521) and the fourth coil (522) in the first direction may be greater than the total length of the first coil (511) and the second coil (512) in the first direction. This may be because, due to the characteristics of the third lens assembly (400) being driven relatively lower than the second lens assembly (300) in the first direction, a stroke must be secured to the lower end of the housing (100) in the first direction through the third coil (521) and the fourth coil (522).

[0105] At this time, the first coil (511) may be closer to the first lens assembly (200) in the first direction than the second coil (512), and the third coil (521) may be closer to the first lens assembly (200) in the first direction than the fourth coil (522). Accordingly, as illustrated in FIG. 4, the drive (600) may overlap at least partially with the first coil (511) and the second coil (512) in the first direction. In addition, the drive (600) may overlap at least partially with the fourth coil (522) in the second direction, but may not overlap with the third coil (521) in the second direction.

[0106] As described above, the first lens assembly (200) is fixed on the housing (100), the second lens assembly (300) is moved in the first direction by the electromagnetic interaction between the first coil (511) and the second coil (512) of the first driving unit (510) and the first magnet (513), and the third lens assembly (400) can be moved in the first direction by the electromagnetic interaction between the third coil (521) and the fourth coil (522) of the second driving unit (520) and the second magnet (523).

[0107] Meanwhile, in order to specifically understand the detailed description of the present invention, the first direction, the second direction, and the third direction are specifically defined. The first direction is a direction parallel to the optical axis of the second camera actuator (A2), and may mean a direction from the upper side to the lower side and a direction from the lower side to the upper side with reference to FIG. 4, and the second direction may mean a direction that is perpendicular to the first direction and parallel to the long axis of the first barrel portion (220) to be described later. The second direction may mean a direction from the upper left side to the lower right side and a direction from the lower right side to the upper left side with reference to FIG. 4. The third direction may mean a direction that is perpendicular to the first direction and the second direction, and parallel to the short axis of the first barrel portion (220) to be described later. The third direction may mean a direction from the upper right side to the lower left side and a direction from the lower left side to the upper right side with reference to FIG. 4.

[0108] Before describing the second camera actuator (A2) according to an embodiment of the present invention, let's first explain the direction of the cross-sectional view of the drawing to be described later. First, the first barrel portion (220) includes a long axis and a short axis, and a direction parallel to the long axis perpendicular to the first direction may be a second direction, and a direction parallel to the short axis may be a third direction. In the detailed description to be described later, the long axis and the second direction may be described interchangeably, and the short axis and the third direction may be described interchangeably.

[0109] At this time, the cross-sectional view in the second direction may be a drawing of the cross-section of the second camera actuator (A2) cut along the second direction as viewed from the third direction, and the cross-sectional view in the third direction may be a drawing of the cross-section of the second camera actuator (A2) cut along the third direction as viewed from the second direction.

[0110] Here, as illustrated in FIG. 5, the cross-sectional view in the fourth direction may be a view of the cross-section of the second camera actuator (A2) cut along the fourth direction, viewed from a direction perpendicular to the fourth direction. In this case, the fourth direction may be a direction between the second and third directions on a plane formed by the second and third directions. That is, in FIG. 5, only the direction from the upper left to the lower right and the direction from the lower right to the upper left are illustrated based on FIG. 5, but the direction may also be from the upper right to the lower left and the direction from the lower left to the upper right. However, this is only an example of the fourth direction, and should not be interpreted as being limited to what has been mentioned.

[0111] Meanwhile, in order to specifically explain the first lens assembly (200), the second lens assembly (300), and the third lens assembly (400) of the second camera actuator (A2) according to an embodiment of the present invention, reference may be made to FIG. 6. Here, FIG. 6 is a cross-sectional view in the second direction based on FIG. 5.

[0112] First, the first lens assembly (200) may include a first lens group (210) arranged in a first direction, a first barrel portion (220) surrounding the first lens group (210), a first protrusion (230) arranged in an end region of the first barrel portion (220) to support the first lens group (210), a first ring member (241, 242, 243) arranged adjacent to a plurality of lenses to fix the lenses or secure a space between the lenses, and a first extension portion (250) extending in a direction perpendicular to the first direction from the first barrel portion (220).

[0113] Here, the first lens group (210) may include a first lens (211) closest to the first camera actuator (A1) in the first direction, a second lens (212) in contact with the first protrusion (230), and a third lens (213) arranged between the first lens (211) and the second lens (212) in the first direction. The first lens (211), the second lens (212), and the third lens (213) may be arranged so that at least a portion thereof is in contact with the inner surface of the first barrel portion (220). The first barrel portion (220) is formed so as to be internally perforated in the first direction, and the first lens (211), the third lens (213), and the second lens (212) may be sequentially arranged inside the first direction.

[0114] At this time, the first protrusion (230) may extend inward from the end of the first barrel portion (220) and may come into contact with the second lens (212) in the first direction. In addition, the first protrusion (230) may be formed in the end region of the first barrel portion (220) adjacent to the second lens assembly (300).

[0115] In addition, the first lens assembly (200) includes a first ring member (241, 242, 243), and the first ring member (241, 242, 243) may include a first-first ring member (241) that fixes the first lens (211) to prevent the first lens (211) from being detached, a first-second ring member (242) that secures a space between the third lens (213) and the second lens (212), and a separation member (243) that is arranged between the first lens (211) and the third lens (213) to separate the first lens (211) and the third lens (213) and thereby prevent flare between the first lens (211) and the third lens (213).

[0116] Additionally, the first extension portion (250) may extend from the first barrel portion (220) in a direction perpendicular to the first direction and be fixed to the housing (100). Specifically, the first extension portion (250) may extend from the first barrel portion (220) in a second direction and be fixed to the housing (100).

[0117] Referring to FIG. 7 to specifically explain the first lens group (210) here, as shown in FIG. 7, the first lens (211) includes a long axis and a short axis, and the second lens (212) and the third lens (213) may have a length in the second direction smaller than that of the first lens (211).

[0118] At this time, the first lens (211) may include a first body part (211a) that is supported by being in contact with the inner surface of the first barrel part (220), and a first transmission part (211b) that is disposed on the inner side of the first body part (211a) and through which light is transmitted, the second lens (212) may include a second body part (212a) that is supported by being in contact with the inner surface of the first barrel part (220), and a second transmission part (212b) that is disposed on the inner side of the second body part (212a) and through which light is transmitted, and the third lens (213) may include a third body part (213a) that is supported by being in contact with the inner surface of the first barrel part (220), and a third transmission part (213b) that is disposed on the inner side of the third body part (213a) and through which light is transmitted.

[0119] Here, the first body portion (211a) may be formed along the periphery of the first transmission portion (211b). More specifically, the first body portion (211a) may be formed to extend a predetermined length in a direction perpendicular to the first direction from the periphery of the first transmission portion (211b). Here, the length of the first transmission portion (211b) in the second direction may be longer than the length in the third direction. In addition, the side surface of the first body portion (211a) in the second direction may have a radius of curvature corresponding to the inner surface of the first barrel portion (220).

[0120] The second body portion (212a) may be formed to extend in a direction perpendicular to the first direction from the circumference of the second transmission portion (212b). More specifically, the second body portion (212a) may extend from the circumference of the second transmission portion (212b) perpendicular to the first direction and in a region between the second direction and the third direction toward the inner surface of the first barrel portion (220). In addition, the second body portion (212a) may include a side surface parallel to the second direction, a side surface parallel to the third direction, and a curved surface that contacts the inner surface of the first barrel portion (220) and is formed to correspond to the curvature of the inner surface of the first barrel portion (220). In this case, the side surface parallel to the second direction and the side surface parallel to the third direction of the second body portion (212a) may be spaced apart from the inner surface of the first barrel portion (220), respectively. Additionally, the second penetration portion (212b) may have a circular shape having a radius of curvature when viewed from the first direction.

[0121] The third body portion (213a) may be formed to extend in a direction perpendicular to the first direction from the circumference of the third transmission portion (213b). More specifically, the third body portion (213a) may extend from the circumference of the third transmission portion (213b) perpendicular to the first direction and in a region between the second and third directions toward the inner surface of the first barrel portion (220). In addition, the third body portion (213a) may include a side surface parallel to the second direction, a side surface parallel to the third direction, and a curved surface that contacts the inner surface of the first barrel portion (220) and is formed to correspond to the curvature of the inner surface of the first barrel portion (220). In this case, the side surface parallel to the second direction and the side surface parallel to the third direction of the third body portion (213a) may be spaced apart from the inner surface of the first barrel portion (220), respectively. Additionally, the third penetration portion (213b) may have a circular shape having a radius of curvature when viewed from the first direction.

[0122] Meanwhile, the second lens assembly (300) may include a second lens group (310) arranged in the first direction, a second barrel portion (320) surrounding the second lens group (310), a second protrusion (330) arranged at an end of the second barrel portion (320) to support the second lens group (310), a second ring member (341, 342) arranged adjacent to a plurality of lenses to fix the lenses or secure a space between the lenses, and a second extension portion (350) extending from the second barrel portion (320) in a direction perpendicular to the first direction and having a first magnet (513) arranged thereon. Here, the second barrel portion (320) may refer to an area that surrounds the second lens group (310) and has a predetermined thickness in a direction away from the second lens group (310) in a direction perpendicular to the first direction, and the second extension portion (350) may refer to an area that extends perpendicular to the first direction in a part of the above-described area and where the first magnet (513) is arranged. For example, with reference to FIG. 6, the second barrel portion (320) includes an area that contacts the second lens group (310) on the right side of FIG. 6 and forms an outer surface with a thickness in a direction perpendicular to the first direction, and an area that has a predetermined thickness in a direction perpendicular to the first direction based on the inner surface that contacts the second lens group (310) on the left side of FIG. 6, and the second extension portion (350) is a remaining area excluding the above-described area, and may refer to an area extended from the above-described second barrel portion (320).

[0123] Here, the second lens group (310) may include a fourth lens (311) adjacent to the first lens assembly (200) in the first direction, and a fifth lens (312) in contact with the second protrusion (330) in the first direction. The fourth lens (311) and the fifth lens (312) may be arranged so that at least a portion thereof is in contact with the inner surface of the second barrel portion (320). The second barrel portion (320) is formed to penetrate in the first direction, and the fourth lens (311) and the fifth lens (312) may be sequentially arranged inside the second barrel portion (320) along the first direction. However, a plurality of lenses may be arranged in addition to the fourth lens (311) and the fifth lens (312), and the present invention should not be construed as being limited thereto.

[0124] At this time, the second protrusion (330) may extend inward from the end of the second barrel portion (320) and may come into contact with the fifth lens (312) in the first direction. In addition, the second protrusion (330) may be formed in the end region of the second barrel portion (320) adjacent to the third lens assembly (400).

[0125] In addition, the second lens assembly (300) includes a second ring member (341, 342), and the second ring member (341, 342) may include a second-first ring member (341) that fixes the fourth lens (311) to prevent the fourth lens (311) from being detached, and a second-second ring member (342) that secures a space between the fourth lens (311) and the fifth lens (312).

[0126] In addition, the second extension portion (350) may extend in a direction perpendicular to the first direction from the second barrel portion (320) and toward the first coil (511) and the second coil (512) of the first driving portion (510). In addition, the second extension portion (350) may be formed to be long in the first direction to secure a space for arranging the first magnet (513). That is, the second extension portion (350) may be formed to have a length in the first direction that is relatively longer than the length of the first extension portion (250). In addition, in order to secure a space for arranging the first magnet (513), the length of the second extension portion (350) in the first direction may be greater than the length of the first magnet (513) in the first direction, but may not necessarily be limited thereto. In addition, since the second extension part (350) cannot secure a sufficient movement distance of the second lens assembly (300) when extending toward the first lens assembly (200) in the first direction, it may be extended toward the lower side of the housing (100) in which the third lens assembly (400) is arranged in the first direction.

[0127] Meanwhile, the third lens assembly (400) may include a third lens group (410) arranged in the first direction, a third barrel portion (420) surrounding the third lens group (410), a third protrusion (430) arranged at an end of the third barrel portion (420) to support the third lens group (410), a third ring member (441) arranged adjacent to a plurality of lenses to fix the lenses or secure a space between the lenses, and a third extension portion (450) extending from the third barrel portion (420) in a direction perpendicular to the first direction and having a second magnet (523) arranged thereon. Here, the third barrel portion (420) may refer to an area that surrounds the third lens group (410) and has a predetermined thickness in a direction away from the third lens group (410) in a direction perpendicular to the first direction, and the third extension portion (450) may refer to an area that extends perpendicular to the first direction in a part of the above-described area and where the second magnet (523) is arranged. For example, with reference to FIG. 6, the third barrel portion (420) is a portion that includes an area that contacts the third lens group (410) on the left side of FIG. 6 and forms an outer surface with a thickness in a direction perpendicular to the first direction, and an area that has a predetermined thickness in a direction perpendicular to the first direction based on the inner surface that contacts the third lens group (410) on the right side of FIG. 6, and the third extension portion (450) is a remaining area excluding the above-described area, and may refer to an area extended from the above-described third barrel portion (420).

[0128] Here, the third lens group (410) may include a sixth lens (411) adjacent to the sensor unit in the first direction and a seventh lens (412) in contact with the third protrusion (430) in the first direction. The sixth lens (411) and the seventh lens (412) may be arranged so that at least a portion thereof is in contact with the inner surface of the third barrel portion (420). The third barrel portion (420) is formed to penetrate in the first direction, and the sixth lens (411) and the seventh lens (412) may be sequentially arranged inside along the first direction. However, a plurality of lenses may be arranged in addition to the sixth lens (411) and the seventh lens (412), and the present invention should not be construed as being limited thereto.

[0129] At this time, the third protrusion (430) may extend inward from the end of the third barrel portion (420) and may come into contact with the seventh lens (412) in the first direction. In addition, the third protrusion (430) may be formed in the end region of the third barrel portion (420) adjacent to the second lens assembly (300).

[0130] In addition, the third lens assembly (400) includes a third ring member (441), and the third ring member (441) may include a third-first ring member (441) that secures a space between the sixth lens (411) and the seventh lens (412), and a third-second ring member that fixes the sixth lens (411) to prevent the sixth lens (411) from being detached. However, the second camera actuator (A2) according to the embodiment of the present invention is illustrated as not having the third-second ring member, and this is to improve the resolution of the image by evenly transmitting the light incident on the sensor unit to the center of the sensor unit and the periphery of the sensor unit, and this is only to sufficiently secure the image resolution, or in other words, the peripheral illumination ratio (RI), and the third-second ring member may be arranged to fix the sixth lens (411), and may not be limited to what has been mentioned.

[0131] In addition, the third extension portion (450) may extend in a direction perpendicular to the first direction from the third barrel portion (420) and toward the third coil (521) and the fourth coil (522) of the second driving portion (520). In addition, the second extension portion (350) may be formed to be long in the first direction to secure a space for arranging the second magnet (523). That is, the length of the third extension portion (450) in the first direction may be formed to be relatively longer than the length of the first extension portion (250) in the first direction. In addition, in order to secure a space for arranging the second magnet (523), the length of the third extension portion (450) in the first direction may be longer than the length of the second magnet (523) in the first direction, but may not be limited thereto. In addition, when the third extension part (450) extends in the first direction away from the first lens assembly (200), it cannot secure sufficient space by coming into contact with the bottom surface of the housing (100), so it may extend in the first direction toward the upper side of the housing (100) where the first lens assembly (200) is arranged.

[0132] Based on this, the second extension portion (350) and the third extension portion (450) may overlap each other at least partially in the second direction, and the second extension portion (350) and the third extension portion (450) may not overlap each other in the first direction.

[0133] In addition, in the first direction, the first protrusion (230) may be arranged in a direction toward the second lens assembly (300), the second protrusion (330) may be arranged in a direction toward the second lens assembly (300), and the third protrusion (430) may be arranged in a direction toward the second lens assembly (300). That is, the directions in which the first protrusion (230), the second protrusion (330), and the third protrusion (430) are arranged may be at least one opposite direction in the first direction.

[0134] In addition, as will be described in more detail with reference to the drawings to be described later, the inner diameter of the inner surface of the first barrel portion (220) in the first direction may increase in a direction away from the first protrusion (230), the inner diameter of the inner surface of the second barrel portion (320) in the first direction may increase in a direction away from the second protrusion (330), and the inner diameter of the inner surface of the third barrel portion (420) in the first direction may increase in a direction away from the third protrusion (430).

[0135] That is, the first protrusion (230) may be formed in an end region of the first barrel portion (220) that is relatively adjacent to the second lens assembly (300), the second protrusion (330) may be formed in an end region of the second barrel portion (320) that is relatively adjacent to the third lens assembly (400), and the third protrusion (430) may be formed in an end region of the third barrel portion (420) that is relatively adjacent to the second lens assembly (300).

[0136] In addition, at least one of the direction in which the inner diameter of the inner surface of the first barrel portion (220) increases in the first direction, the direction in which the inner diameter of the inner surface of the second barrel portion (320) increases, and the direction in which the inner diameter of the inner surface of the third barrel portion (420) increases may be different from each other. At this time, in the second camera actuator (A2) according to the embodiment of the present invention, the direction in which the inner diameter of the inner surface of the third barrel portion (420) of the third lens assembly (400) increases in the first direction may be different from the first lens assembly (200) and the second lens assembly (300).

[0137] In addition, since the first protrusion (230) is formed in the end region of the first barrel portion (220) facing the second lens assembly (300) based on the center of the first barrel portion (220) in the first direction, and the inner diameter of the inner surface of the first barrel portion (220) increases in the first direction away from the first protrusion (230), the direction from the center of the first barrel portion (220) in the first direction toward the first protrusion (230) and the direction in which the inner diameter of the inner surface of the first barrel portion (220) increases in the first direction may be opposite to each other. Since the second protrusion (330) is also formed in the end region of the second barrel portion (320) facing the third lens assembly (400) based on the center of the second barrel portion (320) in the first direction, the direction from the center of the second barrel portion (320) in the first direction toward the second protrusion (330) and the direction in which the inner diameter of the inner surface of the second barrel portion (320) increases in the first direction are opposite directions, and the direction from the center of the first barrel portion (220) in the first direction toward the first protrusion (230) and the direction from the center of the second barrel portion (320) in the first direction toward the second protrusion (330) are the same, and the direction in which the inner diameter of the inner surface of the first barrel portion (220) in the first direction increases and the direction in which the inner diameter of the inner surface of the second barrel portion (320) in the first direction may be the same.

[0138] At this time, the third protrusion (430) is formed in the end region of the third barrel portion (420) facing the second lens assembly (300) based on the center of the third barrel portion (420) in the first direction, and the inner diameter of the inner surface of the third barrel portion (420) increases in the direction away from the third protrusion (430) in the first direction, so the direction from the center of the third barrel portion (420) in the first direction toward the third protrusion (430) and the direction in which the inner diameter of the inner surface of the third barrel portion (420) increases may be opposite to each other. Accordingly, the direction toward the third protrusion (430) based on the center of the third barrel portion (420) in the first direction is the opposite direction to the direction toward the first protrusion (230) based on the center of the first barrel portion (220) in the first direction and the direction toward the second protrusion (330) based on the center of the second barrel portion (320) in the first direction, and the direction in which the inner diameter of the inner surface of the third barrel portion (420) increases in the first direction may be the opposite direction to the direction in which the inner diameter of the inner surface of the first barrel portion (220) increases and the direction in which the inner diameter of the inner surface of the second barrel portion (320) increases.

[0139] Meanwhile, referring to FIGS. 6, 8, and 9, the cross-section in the second direction, the cross-section in the third direction, and the cross-section in the fourth direction of the second camera actuator (A2) according to the embodiment of the present invention may have different shapes. FIG. 6 is a cross-section taken along the long axis of the first barrel portion (220) of the second camera actuator (A2) according to the embodiment of the present invention as viewed from the third direction, and as illustrated in FIG. 6, the inner diameters of the inner surfaces of the first barrel portion (220), the second barrel portion (320), and the third barrel portion (420) in the first direction may increase or decrease. FIG. 8 is a cross-section taken along the short axis of the first barrel portion (220) of the second camera actuator (A2) according to an embodiment of the present invention, as viewed in the second direction. As shown in FIG. 8, the inner diameters of the inner surfaces of the first barrel portion (220), the second barrel portion (320), and the third barrel portion (420) in the first direction can be increased or decreased by a predetermined length.

[0140] At this time, the inner diameters of the first barrel portion (220), the second barrel portion (320), and the third barrel portion (420) in the second direction may increase or decrease in the first direction, and the inner diameters in the third direction may also increase. Since the outer diameter in the third direction determines the overall volume of the module in the third direction, it is preferable to have a shortening in the third direction in order to minimize the volume of the module, and it may be preferable that the outer diameters of the first barrel portion (220), the second barrel portion (320), and the third barrel portion (420) in the third direction have a small range of change in the first direction. However, this is merely an exemplary description of the second camera actuator (A2) according to an embodiment of the present invention and may not necessarily be limited thereto.

[0141] Meanwhile, FIG. 9 is a view of a cross-section of a second camera actuator (A2) according to an embodiment of the present invention in the fourth direction as viewed from a direction perpendicular to the fourth direction, and the maximum length of the second lens (212) in the fourth direction may be greater than the maximum length of the second lens (212) in the second direction and the maximum length of the second lens (212) in the third direction, and the maximum length of the third lens (213) in the fourth direction may be greater than the maximum length of the third lens (213) in the second direction and the maximum length of the third lens (213) in the third direction. This may be because, as illustrated in FIG. 7, the second body part (212a) of the second lens (212) and the third body part (213a) of the third lens (213) extend from the periphery of the second transmission part (212b) and the periphery of the third transmission part (213b) in the direction between the second direction and the third direction on the plane formed by the second direction and the third direction, respectively.

[0142] That is, the first lens (211), the fourth lens (311), the fifth lens (312), the sixth lens (411), and the seventh lens (412) may have a length in the second direction greater than a length in the third direction, and the second lens (212) and the third lens (213) may have a length in the second direction greater than a length in the third direction, and a length in the fourth direction greater than a length in the second direction. In addition, the maximum length of the second lens (212) in the fourth direction may be less than the maximum length of the first lens (211) in the fourth direction and the maximum length of the third lens (213) in the fourth direction. However, this is merely an exemplary description of the second camera actuator (A2) according to an embodiment of the present invention and may not necessarily be limited thereto.

[0143] Meanwhile, for a more specific explanation based on the above, reference may be made to FIGS. 10 to 13.

[0144] First, referring to FIG. 10 to explain the first lens assembly (200), as illustrated in FIG. 10, since the first protrusion (230) supports the second lens (212) in the first direction, the minimum inner diameter (L1) in the second direction may be smaller than the minimum length of the second lens (212) in the second direction. In addition, since the lengths of the lenses (211, 212, 213) of the first lens group (210) in the second direction increase in the direction away from the first protrusion (230), it may be preferable that the length (L3) of the first lens (211) in the second direction be larger than the minimum inner diameter (L1) of the first protrusion (230) in the second direction. Accordingly, by sufficiently securing the length (L3) of the first lens (211) relatively closest to the first camera actuator (A1) in the second direction, the amount of light passing through the first transmission portion (211b) increases, thereby sufficiently securing the peripheral light ratio (RI; Realtive Illumination) while improving the optical performance. In addition, in the past, when the maximum length (L4) of the second lens (212) in the second direction increased, it was difficult to control the deviation in the thickness of the second body portion (212a) of the second lens (212) and the thickness of the center of the second transmission portion (212b) in the first direction, but in the second camera actuator (A2) according to the embodiment of the present invention, the maximum length (L4) of the second lens (212) in the second direction is smaller than the maximum length (L3) of the first lens (211) in the second direction, so that the deviation in the thickness of the second lens (212) described above can be more easily controlled.

[0145] In addition, in order to prevent the amount of light transmitted through the second lens (212) from spreading out and moving toward the first protrusion (230) and moving to the sensor unit from being reduced, the minimum inner diameter (L2) of the first protrusion (230) may be smaller than the maximum length (L4) of the second lens (212) in the second direction. This is only one example of the second camera actuator (A2) according to an embodiment of the present invention, and may not necessarily be limited thereto. However, as described above, when the maximum length (L3) of the first lens (211) in the second direction is greater than the maximum length (L4) of the second lens (212) in the second direction, and, although not shown, the maximum length of the third lens (213) in the second direction is greater than the maximum length (L4) of the second lens (212) in the second direction, when the minimum inner diameter (L1) of the first protrusion (230) in the second direction is smaller than the minimum length of the second lens (212) in the second direction, and the maximum inner diameter (L2) of the first protrusion (230) in the second direction is greater than the maximum length (L4) of the second lens (212) in the second direction, it may be desirable to improve the optical performance as described above.

[0146] In addition, since the inner diameter of the first barrel portion (220) in the second direction increases in the direction away from the first protrusion (230) in the first direction, the maximum inner diameter (L5) of the bottom surface of the first barrel portion (220) in the first direction, specifically, the bottom surface of the first barrel portion (220) where the first protrusion (230) is formed, may be smaller than the maximum inner diameter (L6) of the first protrusion (230) that is far from the first protrusion (230) in the first direction. Through this, as described above, the amount of light transmitting through the first lens (211) can be increased, thereby effectively improving the image resolution. In addition, when viewing the entire first lens group (210), the direction in which the length of each lens (211, 212, 213) in the second direction increases may be the opposite direction to the direction toward the first protrusion (230) with respect to the center of the first barrel portion (220) in the first direction.

[0147] If this is explained based on FIG. 10, the direction in which the length of each lens (211, 212, 213) in the second direction increases is the direction from the lower side to the upper side based on FIG. 10, the direction toward the first protrusion (230) based on the center of the first barrel portion (220) in the first direction is the direction from the upper side to the lower side, the direction in which the inner diameter of the first barrel portion (220) increases is the direction from the lower side to the upper side, and the direction from the minimum inner diameter (L1) of the first protrusion (230) in the second direction to the maximum inner diameter (L2) of the first protrusion (230) in the second direction may be the direction from the upper side to the lower side.

[0148] Meanwhile, referring to FIG. 11 to explain the second lens assembly (300), as illustrated in FIG. 11, the second lens group (310) includes a fourth lens (311) that is furthest from the second protrusion (330) in the first direction and a fifth lens (312) that is adjacent to the second protrusion (330) in the first direction, and in order to support the fifth lens (312), a minimum inner diameter (L7) of the second protrusion (330) in the second direction may be larger than a minimum length of the fifth lens (312) in the second direction. In addition, since the second protrusion (330) is formed in the direction toward the third lens assembly (400) in the first direction, the maximum length (L9) of the fifth lens (312) in the second direction may be smaller than the maximum length (L8) of the fourth lens (311) in the second direction, and the maximum inner diameter (L10) of the bottom surface of the second barrel portion (320) on which the second protrusion (330) is formed may be smaller than the maximum inner diameter (L11) of the second barrel portion (320) that is farther from the second protrusion (330) in the first direction. That is, when viewing the entire second lens group (310) in the same way as the first lens group (210), the direction in which the length of each lens (311, 312) in the second direction increases may be the opposite direction to the direction toward the second protrusion (330) with respect to the center of the second barrel portion (320) in the first direction.

[0149] If this is explained based on FIG. 11, the direction in which the length of each lens (311, 312) in the second direction increases is the direction from the lower side to the upper side based on FIG. 11, the direction toward the second protrusion (330) based on the center of the second barrel portion (320) in the first direction is the direction from the upper side to the lower side, the direction in which the inner diameter of the second barrel portion (320) increases is the direction from the lower side to the upper side, and the direction from the minimum inner diameter (L7) of the second protrusion (330) in the second direction to the maximum inner diameter of the second protrusion (330) in the second direction may be the direction from the upper side to the lower side.

[0150] Meanwhile, referring to FIG. 12 to explain the third lens assembly (400), as illustrated in FIG. 12, the third lens group (410) includes the sixth lens (411) that is furthest from the third protrusion (430) in the first direction and the seventh lens (412) that is adjacent to the third protrusion (430) in the first direction, and in order to support the seventh lens (412), the minimum inner diameter (L12) of the third protrusion (430) in the second direction may be greater than the minimum length of the seventh lens (412) in the second direction. In addition, since the third protrusion (430) is formed in the first direction toward the second lens assembly (300), the maximum length (L14) of the seventh lens (412) in the second direction may be smaller than the maximum length (L13) of the sixth lens (411) in the second direction, and the maximum inner diameter (L15) of the bottom surface of the third barrel portion (420) on which the third protrusion (430) is formed may be smaller than the maximum inner diameter (L16) of the third barrel portion (420) that is farther from the third protrusion (430) in the first direction. That is, when viewing the entire third lens group (410), the direction in which the length of each lens (411, 412) in the second direction increases may be the opposite direction to the direction toward the second protrusion (330) with respect to the center of the third barrel portion (420) in the first direction.

[0151] If this is explained based on FIG. 12, the direction in which the length of each lens (411, 412) in the second direction increases is the direction from the upper side to the lower side based on FIG. 12, the direction toward the third protrusion (430) based on the center of the third barrel portion (420) in the first direction is the direction from the lower side to the upper side, the direction in which the inner diameter of the third barrel portion (420) increases is the direction from the upper side to the lower side, and the direction from the minimum inner diameter (L12) of the third protrusion (430) in the second direction to the maximum inner diameter of the third protrusion (430) in the second direction may be the direction from the lower side to the upper side.

[0152] At this time, the reason why the third lens assembly (400) is different from the first lens assembly (200) and the second lens assembly (300) in the first direction in the direction of the protrusions (230, 330, 430) based on the center of each barrel portion (220, 320, 420) is because the light transmitted through the third lens assembly (400) is incident on the sensor portion, and some of the light is spread out from the seventh lens (412) to secure the relative illumination (RI), and when the area where the third protrusion (430) is formed is adjacent to the bottom surface of the housing (100), the light is not sufficiently transmitted to the periphery of the sensor portion by the third protrusion (430), so that the relative illumination (RI) is lowered, which may cause a problem in that the image resolution is lowered, and therefore, as described above, in the first direction, the third lens is formed at the center of the third barrel portion (420) It may be preferable that the direction toward the third protrusion (430) of the assembly (400) is opposite to the direction toward the first protrusion (230) of the first lens assembly (200) from the center of the first barrel portion (220) in the first direction and the direction toward the second protrusion (330) of the second lens assembly (300) in the first direction.

[0153] To summarize and explain the above, the maximum length of the "sleeve*" of the second lens (212) in contact with the first protrusion (230) among the plurality of lenses (211, 212, 213) arranged in the first direction, perpendicular to the first direction, may be smaller than the maximum length of the first lens (211) arranged relatively farthest from the first protrusion (230) in the first direction, in the direction perpendicular to the first direction. Specifically, the first lens (211) is arranged relatively farthest from the first protrusion (230) in the first direction and has a maximum length (L3) in the second direction, the second lens (212) is arranged perpendicular to the first direction and has a maximum length in the fourth direction between the second direction and the third direction, and the maximum length (L3) of the first lens (211) in the second direction perpendicular to the first direction is the second It may be greater than the maximum length in the direction perpendicular to the first direction of the lens (212).

[0154] In addition, among the plurality of lenses (311, 312) arranged in the first direction, the maximum length (L9) of the fifth lens (312) in the direction perpendicular to the first direction, which is in contact with the second protrusion (330) in the first direction, of the second lens assembly (300) may be smaller than the maximum length (L11) of the fourth lens (311) in the direction perpendicular to the first direction, which is arranged farthest from the second protrusion (330) in the first direction. Specifically, the fourth lens (311) is arranged relatively farthest from the second protrusion (330) in the first direction and has the maximum length (L11) in the second direction, and the fifth lens (312) is arranged relatively adjacent to the second protrusion (330) in the first direction and has the maximum length (L9) in the second direction. Here, the maximum length (L11) of the fourth lens (311) in the second direction perpendicular to the first direction may be greater than the maximum length (L9) of the fifth lens (312) in the second direction perpendicular to the first direction.

[0155] In addition, among the plurality of lenses (411, 412) arranged in the first direction, the maximum length (L14) of the seventh lens (412) in the direction perpendicular to the first direction, which is in contact with the third protrusion (430) in the first direction, of the third lens assembly (400) may be smaller than the maximum length (L13) of the sixth lens (411) in the direction perpendicular to the first direction, which is arranged farthest from the third protrusion (430) in the first direction. Specifically, the sixth lens (411) may be arranged relatively farthest from the third protrusion (430) in the first direction and may have the maximum length (L13) in the second direction, and the seventh lens (412) may be arranged relatively adjacent to the third protrusion (430) in the first direction and may have the maximum length (L14) in the second direction. Here, the maximum length (L13) of the sixth lens (411) in the second direction perpendicular to the first direction may be greater than the maximum length (L14) of the seventh lens (412) in the second direction perpendicular to the first direction.

[0156] Meanwhile, referring to FIG. 13, the first barrel portion (220), the second barrel portion (320), and the third barrel portion (420) according to the embodiment of the present invention have a long axis in the second direction and a short axis in the third direction, so that the inner diameters of the protrusions (230, 330, 430) in the second direction and the inner diameters in the third direction on a plane perpendicular to the first direction may be different from each other. As an example, if only the first protrusion (230) of the first barrel portion (220) is described, the first protrusion (230) includes a first part (231) and a second part (232), and the first part (231) may be arranged in the second direction, and the second part (232) may be arranged in the third direction. In addition, the first part (231) may have a curvature in the second direction, and the second part (232) may be arranged parallel to the second direction. Additionally, since the first part (231) has a curvature, the inner diameter in the second direction may vary along the third direction, but since the second part (232) is parallel to the second direction, the inner diameter of the second part (232) in the third direction may be the same along the second direction.

[0157] That is, the inner diameter of the first part (231) in the second direction and the inner diameter of the second part (232) in the third direction are different from each other, and the maximum inner diameter (L1) of the first part (231) in the second direction may be larger than the maximum inner diameter (L17) of the second part (232) in the third direction. Through this, the amount of light incident on the sensor unit can be increased, thereby improving the relative illumination (RI).

[0158] In addition, since the first part (231) and the second part (232) are formed to be inclined with respect to the first direction, the inner diameter of the first part (231) in the second direction and the inner diameter of the second part (232) in the third direction can be reduced in the direction toward the first lens group (210) in the first direction.

[0159] However, this is only a representative description of the first lens assembly (200), and the above-described features may also be included in the second lens assembly (300) and the third lens assembly (400), and should not be interpreted as being limited to being formed only in the first lens assembly (200).

[0160] Meanwhile, a preferred embodiment for securing the relative illumination (RI) through the camera actuator (A2) according to the embodiment of the present invention described above has been examined, but the first lens assembly (200) arranged relatively close to the object must secure a sufficient gap between the first lens (211) and the third lens (213) in order to prevent flare in which light is reflected from the surface of the third lens (213) in the process of the light transmitted from the first lens (211) moving to the third lens (213), so a separation part (243) for separating the first lens (211) and the third lens (213) is necessarily arranged in the first lens (211) and the third lens (213), and in order to secure a light path incident on the sensor unit of the second camera actuator (A2), the light path from the first lens (211) is tilted toward the optical axis, but some of the light In this case, there was a problem that some light was not transmitted due to a separate separation unit (243) that separates the first lens (211) and the third lens (213) in the space between the first lens (211) and the third lens (213), and this problem may be caused by a significant difference in the amount of light sensed at the center of the sensor unit and the amount of light sensed at the periphery of the sensor unit, so that the peripheral illumination ratio (RI; Relative Illumination) may not be sufficiently secured.

[0161] In order to solve this, the contact area between the first lens (211) and the separation portion (243) in the direction from the first lens (211) to the third lens (213) must be minimized. However, if the minimum thickness of the separation portion (243) is not secured, the separation portion (243) may be damaged during the assembly process, and physically, thinning the thickness of the separation portion (243) may require high technical skills. At this time, the first lens (211) may be the lens that is relatively closest to the first camera actuator (A1) in the first direction, and the third lens (213) may be a lens that is positioned next to the first lens (211) in the opposite direction to the direction toward the first camera actuator (A1) in the first direction.

[0162] In order to effectively solve the above-described problem, the first lens assembly (200) according to the modified example of the present invention has a first protrusion (230) that protrudes inward from the inner surface of the barrel portion (220), so that a separate separation portion (243) for separating the first lens (211) and the third lens (213) as described above is not required, and the problem that the thickness of the separation portion (243) in the first lens assembly (200) could not be reduced to a certain level due to physical limitations is effectively solved, thereby sufficiently securing a relative illumination (RI). That is, the first protrusion (230) can perform the role of the separation portion (243). This can be described in more detail with reference to FIGS. 14 to 19 to be described later.

[0163] Specifically, FIG. 14 is a drawing showing a cross-section from B' to B" of a camera actuator according to a modified example of the present invention, FIG. 15 is a drawing showing a cross-section from C' to C" of a camera actuator according to a modified example of the present invention, FIG. 16 is a drawing for explaining a first region and a second region in a B'B" cross-section of a camera actuator according to a modified example of the present invention, FIG. 17 is a drawing for explaining a first region and a second region in a C'C" cross-section of a camera actuator according to a modified example of the present invention, FIG. 18 is a drawing for explaining contact between a protrusion of a camera actuator and a first lens according to a modified example of the present invention, and FIG. 19 is a drawing for exemplarily explaining a process of assembling a first lens assembly of a camera actuator according to an embodiment of the present invention.

[0164] First, a first lens assembly (200) according to a modified example of the present invention includes a first lens group (210) including a plurality of lenses arranged in a first direction as described above, a first barrel portion (220) surrounding the first lens group (210) and including a major axis and a minor axis perpendicular to the first direction, and a first protrusion (230) protruding from an inner surface of the first barrel portion (220) in a direction perpendicular to the first direction and toward the inside of the barrel portion (220). That is, the first protrusion (230) may be a portion formed between a third region (221) and a fourth region (222) to be described later in the first direction and protruding toward the inside of the first barrel portion (220) in a direction perpendicular to the first direction.

[0165] Unlike the first protrusion (230) extending toward the inside of the first barrel portion (220) in the first direction end region of the first barrel portion (220) of the first lens assembly (200) according to the above-described embodiment of the present invention, the first protrusion (230) of the first lens assembly (200) according to the modified example of the present invention may be formed to protrude toward the inside from the first barrel portion (220).

[0166] Here, in order to compare and explain the cross-section in the second direction when viewed from the third direction and the cross-section in the third direction when viewed from the second direction for the first lens assembly (200) according to the modified example of the present invention, reference may be made to FIGS. 14 and 15. First, as illustrated in FIGS. 14 and 15, the first lens assembly (200) according to the modified example of the present invention may include a first lens group (210) including a plurality of lenses arranged in the first direction as described above, a first barrel portion (220) surrounding the first lens group (210), and a first protrusion (230) protruding from the inside of the first barrel portion (220). At this time, the cross-section in the second direction and the cross-section in the third direction may be cross-sections crossing the center of the first lens group (210) or the center of the first barrel portion (220), as illustrated in FIG. 15. In the following description, it may be desirable to understand that the cross-section in the second direction and the cross-section in the third direction mean a cross-section that crosses the center of the first lens group (210) or the center of the first barrel portion (220) as described above.

[0167] Here, the first lens group (210) includes a first lens (211), a second lens (212), and a third lens (213), and the first lens (211) and the third lens (213) are partially in contact with the first protrusion (230), and the first lens (211) may include an area in contact with the first protrusion (230) as illustrated in FIG. 14 and a non-contact area (211b) that is not in contact with the first protrusion (230) as illustrated in FIG. 15. In addition, the first lens (211) may be arranged to be spaced apart from the second lens (212) and the third lens (213) in the first direction, and the second lens (212) and the third lens (213) may be arranged adjacent to each other, but the third lens (213) may be arranged to be in contact with the first protrusion (230), and the second lens (212) may be arranged to be spaced apart from the first protrusion (230) in the first direction.

[0168] Here, the first lens (211) may be a lens closest to the first camera actuator (A1) in the first direction, the second lens (212) may be a lens farthest from the first camera actuator (A1) in the first direction, and the third lens (213) may be a lens positioned between the first lens (211) and the second lens (212) in the first direction.

[0169] Meanwhile, the first protrusion (230) is arranged between the first lens (211) and the third lens (213) of the first lens group (210) in the first direction, and may include a first surface (233) that contacts the first lens (211) in the first direction and a second surface (234) that contacts the third lens (213). In addition, the first protrusion (230) may be formed to protrude toward the center of the first barrel portion (220) on a plane formed by the second direction and the third direction from the inside of the first barrel portion (220).

[0170] In addition, the inside of the first barrel portion (220) may be formed with a hole penetrating in the first direction, and the first protrusion (230) may also be formed with a through hole (235) penetrating in the first direction. Light transmitted through the first lens (211) disposed on one side of the first protrusion (230) in the first direction may travel to the third lens (213) via the through hole (235). In addition, the first barrel portion (220) may include a third region (221) and a fourth region (222) partitioned in the first direction by the first protrusion (230), and the first lens (211) may be disposed in the third region (221), and the second lens (212) and the third lens (213) may be disposed in the fourth region (222). In addition, in the fourth region (222), the second lens (212) is arranged adjacent to the third lens (213), and in the first direction, the first lens (211) may be arranged spaced apart from the third lens (213) and the second lens (212) by the first protrusion (230). In addition, the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the second direction and the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction may be different. More specifically, the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the second direction may be shorter than the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction. In this case, the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the second direction and the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction may be lengths on the same plane formed by the second direction and the third direction.

[0171] At this time, the first lens assembly (200) according to the modified example of the present invention further includes a first ring member (241, 242) and a film member (260), and the first ring member (241, 242) includes a first-first ring member (241) for fixing the first lens (211) and a first-second ring member (242) for securing a clearance in the first direction between the third lens (213) and the second lens (212), and the film member (260) can be arranged to be in contact with the first-second ring member (242) in the first direction.

[0172] Here, the film portion (260) may be a film for preventing flare occurring between the first lens (211) and the third lens (213). That is, even if the clearance between the first lens (211) and the third lens (213) is secured through the first protrusion (230), flare may occur between the first lens (211) and the third lens (213), so the film portion (260) can effectively improve the resolution of the second camera actuator (A2) according to the modified example of the present invention by reducing the flare occurring between the first lens (211) and the third lens (213) described above.

[0173] Meanwhile, referring to FIG. 14 for more detailed explanation, as illustrated in FIG. 14, the first surface (233) of the first protrusion (230) in contact with the bottom surface (211a) of the first lens (211) may overlap at least a portion of the first lens (211) in the first direction, and the second surface (234) of the first protrusion (230) in contact with the upper surface of the third lens (213) may overlap at least a portion of the third lens (213) in the first direction. At this time, the inner diameter of the first protrusion (230) may gradually decrease in the direction from the first surface (233) toward the second surface (234), and thus, the through hole (235) of the first protrusion (230) may have a shape similar to a truncated cone. However, this is only an exemplary description of the first lens assembly (200) according to a modified example of the present invention, and is not necessarily limited to what has been mentioned, and may have a cylindrical shape, but a more preferable example may be a case where the through hole (235) of the first protrusion (230) has a shape similar to a truncated cone as described above.

[0174] At this time, as shown in FIG. 14, when the cross-section in the second direction is viewed from the third direction, the bottom surface (211a) of the first lens (211) is in contact with the first surface (233), but as shown in FIG. 15, when the cross-section in the third direction is viewed from the second direction, the bottom surface (211a) of the first lens (211) may include a non-contact area (211b) that does not contact the first surface (233). In addition, the upper portion of the first protrusion (230), specifically, the area adjacent to the non-contact area (211b) of the first lens (211) in the first direction, more specifically, the inner surface of the first protrusion (230) and the inner surface of the first barrel portion (220) in the first area (236) described later may form an overlapping area (236a) that is flush with each other. As the overlapping area (236a) is formed in this way, when the cross-section in the third direction is viewed from the second direction, the first lens (211) can be spaced apart from the protrusion (230) in the first direction.

[0175] For a specific explanation of this, referring to FIGS. 16 to 18, as shown in FIGS. 16 to 18, the first protrusion (230) includes a first region (236) and a second region (237) arranged in a first direction, and the first region (236) may be a region in which the inner diameter of the first protrusion (230) in the second direction and the inner diameter of the first protrusion (230) in the third direction are different from each other, and the second region (237) may be a region in which the inner diameter of the first protrusion (230) in the second direction and the inner diameter of the first protrusion (230) in the third direction are the same. At this time, although it is described as the inner diameter of the first protrusion (230), it may be desirable to interpret it as having the same meaning as the diameter of the through hole (235), the diameter of the first protrusion (230) or the through hole (235), the distance between the inner surfaces of the first protrusions (230) that face each other at the same height in the first direction in the cross-section in the second direction, and the distance between the inner surfaces of the first protrusions (230) that face each other at the same height in the first direction in the cross-section in the third direction. At this time, since the through hole (235) does not have a physical shape and is a space defined by the inner surface of the first protrusion (230), the diameter of the through hole (235) will be described as a diameter, and since the first protrusion (230) has a physical shape, the inner diameter of the first protrusion (230) will be described as the inner diameter of the first protrusion (230).

[0176] Meanwhile, the first region (236) and the second region (237) may be arranged in the first direction, and the first region (236) may be an region closer to the first lens (211) than the second region (237), and the second region (237) may be an region closer to the third lens (213) than the first region (236). This will be described in more detail through the overlapping region (236a) to be described later. In addition, since the diameter of the through hole (235), or differently, the inner diameter of the first protrusion (230), gradually decreases from the second surface (234) toward the first surface (233), the minimum inner diameter of the first region (236) is the same as the maximum inner diameter of the second region (237), and the minimum inner diameter of the first region (236) may always have a larger value than the inner diameter of the second region (237) which has a length less than the maximum inner diameter of the second region (237).

[0177] Here, the first region (236) and the second region (237) are not physically distinct structures, but the first region (236) is an area where the inner diameters of the first protrusion (230) are different from each other in the second and third directions, and the second region (237) is an area where the inner diameters of the first protrusion (230) are the same from each other in the second and third directions, and are distinguished by the inner diameter of the first protrusion (230). Therefore, it is preferable to interpret the inner diameter of the first region (236) as the inner diameter of the first protrusion (230) in the first region (236), and it is preferable to interpret the inner diameter of the second region (237) as the inner diameter of the first protrusion (230) in the second region (237).

[0178] To explain this more specifically, as shown in FIG. 16, when the cross-section in the second direction is viewed from the third direction, the inner diameter (D3) of the first region (236) in the second direction is larger than the inner diameter (D4) of the first region (236) in the third direction when the cross-section in the third direction is viewed from the second direction, as shown in FIG. 17, and as shown in FIG. 16, when the cross-section in the second direction is viewed from the third direction, the inner diameter (D5) of the second region (237) in the second direction may be equal to the inner diameter (D6) of the second region (237) in the third direction when the cross-section in the third direction is viewed from the second direction, as shown in FIG. 17.

[0179] In addition, as illustrated in FIG. 18, when looking at the first lens (211) from below the plane formed by the second direction and the third direction based on the first region (236), the bottom surface (211a) of the first lens (211) may include a region in contact with the first surface (233) and a non-contact region (211b) adjacent to an overlapping region (236a). In addition, since the inner diameter (D3) in the second direction and the inner diameter (D4) in the third direction on the first region (236) cannot further expand the inner diameter of the first protrusion (230) in the third direction due to the overlapping region (236a), the inner diameter (D3) of the first region (236) in the second direction may always be larger than the inner diameter (D4) of the first region (236) in the third direction within the first region (236) where the overlapping region (236a) is formed.

[0180] To explain this more specifically with reference to FIGS. 16 and 17, the overlapping area (236a) may mean a portion where the inner surface of the first barrel portion (220) and the inner surface of the first protrusion (230) are on the same plane, and the overlapping areas (236a) are formed in a pair spaced apart in the third direction, and the shortest length in the third direction from one overlapping area (236a) to the other overlapping area (236a) is always the same as the inner diameter (D4) of the first area (236) in the third direction, but the inner diameter (D3) of the first area (236) in the second direction may decrease or increase along the first direction.

[0181] In this way, the reason why the inner diameter (D3) in the second direction and the inner diameter (D4) in the third direction in the first region (236) are different from each other is because the inner diameter of the first protrusion (230) cannot be further expanded by the overlapping region (236a), as illustrated in FIG. 17. Accordingly, the first region (236) may mean the lowermost end of the overlapping region (236a) in the first direction, or more precisely, the upper region of the through hole (235) based on the end of the overlapping region (236a) that is relatively closest to the third lens (213) in the first direction.

[0182] Based on this, referring to FIGS. 14 and 15, the shortest length (D1) between the outer surface of the first barrel part (220) and the inner surface of the first protrusion (230) and the shortest length (D2) between the outer surface of the first barrel part (220) and the inner surface of the first protrusion (230) in the third direction will be described again. The shortest length (D1) between the outer surface of the first barrel part (220) and the inner surface of the first protrusion (230) corresponds to the shortest length from the outer surface of the first barrel part (220) to the inner surface of the first protrusion (230) when the cross-section in the second direction is viewed from the third direction, so it can gradually increase from the first lens (211) to the third lens (213) in the first direction, but if the outer surface of the first barrel part (220) includes a region formed to be inclined as illustrated in FIG. 14, the first barrel part (220) The shortest length (D1) between the inner surface of the first protrusion (230) on the outer surface may be the same or the increase may decrease in the area section where the outer surface of the first barrel portion (220) is formed to be inclined.

[0183] In addition, although not shown, if the angle formed by the area where the outer surface of the first barrel portion (220) is inclined with respect to the first direction is greater than the angle formed by the inner surface of the first protrusion (230) with respect to the first direction, the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the direction from the first lens (211) toward the third lens (213) in the first direction may be reduced. This may vary depending on the design intent and may not necessarily be interpreted as being limited to what has been mentioned. However, in explaining the second camera actuator (A2) according to a modified example of the present invention, in order to prevent the present invention from being misunderstood by simultaneously explaining several embodiments, the increase in the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the region where the outer surface of the first barrel portion (220) is formed to be inclined is illustrated as decreasing in the direction from the first lens (211) toward the third lens (213), and the detailed description to be described later can also be explained based on this, but should not be interpreted as being limited to what has been mentioned above.

[0184] However, as illustrated in FIG. 15, the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction corresponds to the shortest length from the outer surface of the first barrel portion (220) to the inner surface of the first protrusion (230) when the cross-section in the third direction is viewed from the second direction, so that in the overlapping area (236a), the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction is the same, but in the section from the lowest end of the overlapping area (236a) in the first direction to the second surface (234), the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction may gradually increase.

[0185] In this way, the first lens (211) and the third lens (213) are not separated through a separate separation portion (243), but the first lens (211) and the third lens (213) are separated in the first direction through the first protrusion (230), and the flare is prevented through the film portion (260), and since the first protrusion (230) is shaped to protrude from the inner surface of the first barrel portion (220), when the first barrel portion (220) is manufactured by injection molding, the thickness of the first protrusion (230) is easily controlled, and the thickness control of the first protrusion (230), more specifically, the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction and the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction By adjusting the length (D2), the ambient light ratio (RI; Relative Illumination) can be effectively secured.

[0186] Meanwhile, when the first protrusion (230) is formed between the first lens (211) and the third lens (213) in the first direction, a change in the assembly process may be required because the first protrusion (230) protrudes from the inner surface of the first barrel portion (220). Accordingly, as illustrated in FIG. 19, the first-first ring member (241) and the first lens (211) may be inserted into the third region (221) in the direction from the third region (221) to the fourth region (222) in the first direction, and the third lens (213), the film portion (260), the first-second ring member (242), and the second lens (212) may be inserted into the fourth region (222) in the direction from the fourth region (222) to the third region (221) in the first direction. Alternatively, referring to FIG. 19, assuming that the upper part of FIG. 19 is the upper side and the lower part of FIG. 19 is the lower side, the 1-1 ring member (241) and the first lens (211) may be inserted downward while positioned on the upper side of the first barrel portion (220), and the 3rd lens (213), the film portion (260), the 1-2 ring member (242), and the 2nd lens (212) may be inserted upward while positioned on the lower side of the 1st barrel portion (220). That is, the direction in which the 1-1 ring member (241) and the 1st lens (211) are inserted into the 1st barrel portion (220) and the direction in which the 3rd lens (213), the film portion (260), the 1-2 ring member (242), and the 2nd lens (212) are inserted into the 1st barrel portion (220) may be opposite to each other.

[0187] At this time, although it is named as the first ring member (241, 242), the first ring member (241, 242) is only a name to collectively refer to the 1-1 ring member (241) and the 1-2 ring member (242), and should not be interpreted as being limited to the mentioned name. In addition, the 1-1 ring member (241) may be defined as a fixing member (241) because it fixes the first lens (211), and the 2nd ring member (242) may be defined as a space (242) because it separates the 3rd lens (213) and the 2nd lens (212). In addition, the 1st ring member (241, 242) comes into contact with the inner surface of the 1st barrel part (220), and the shapes of the 1-1 ring member (241) and the 1-2 ring member (242) may be different depending on the area where they are arranged. For example, the first-first ring member (241) may be in the shape of a ring including parallel areas facing in the third direction, and the first-second ring member (242) may be in the shape of a ring corresponding to the inner surface of the first barrel portion (220). This is merely an exemplary description of the first ring member (241, 242), and may not necessarily be limited thereto.

[0188] In this way, the first-first ring member (241) and the first lens (211) are arranged to be spaced apart from the third lens (213), the film member (260), the first-second ring member (242), and the second lens (212) by the protrusion (230), and the maximum length of the first lens (211) is greater than the maximum lengths of the third lens (213) and the second lens (212), and since the length of the fourth region (222) in the second direction and the length of the third region (221) in the second direction are different from each other, there may also be an advantage in that the insertion position of the first lens (211) is clear during the assembly process.

[0189] In addition, the assembly process of the first lens assembly (200) according to the embodiment of the present invention forms the first protrusion (230) at the lowest end of the first barrel portion (220), the lowest end of the fourth region (222) based on FIG. 19, and the second lens (212) is first inserted, and the first-second ring member (242), the film member (260), the third lens (213), the separation member (243), the first lens (211), and the first-first ring member (241) must be sequentially inserted. Therefore, if the second lens (212), the third lens (213), or the film member (260) tilts during the assembly process, or if an already inserted configuration tilts, it may be difficult to confirm and correct it. However, the first lens assembly (200) according to the modified example of the present invention may have an advantage in that the first protrusion (230) is arranged between the first lens (211) and the third lens (213) in the first direction, and the third region (221) and the fourth region (222) are formed by the first protrusion (230), so that the first lens (211) and the first-first ring member (241) tilted in the third region (221) can be easily modified, and the third lens (213), the film member (260), the first-second ring member (242), and the second lens (212) inserted through the third region (221) can be easily modified.

[0190] To summarize, the first lens assembly (200) according to a modified example of the present invention and the second camera actuator (A2) including the same have a first protrusion (230) formed that protrudes from the inner surface of the first barrel portion (220), and by adjusting the shortest length (D1) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) and the shortest length (D2) between the outer surface of the first barrel portion (220) and the inner surface of the first protrusion (230) in the third direction, the first lens (211) and the third lens (213) can be spaced apart in the first direction to prevent flare while sufficiently securing the relative illumination (RI), and the convenience of injection molding the first barrel portion (220) and the convenience of the assembly process of the first lens assembly (200) can be improved.

[0191] Having described preferred embodiments of the invention, it will be apparent to those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or scope thereof, in addition to the embodiments described above.

[0192] Therefore, the above-described embodiments should be considered as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description but may be modified within the scope of the appended claims and their equivalents.

Claims

1. Housing; a first lens assembly fixed to one side of the housing; and A second lens assembly and a third lens assembly are included that move along a first direction parallel to the optical axis inside the housing, A camera actuator, wherein the first lens assembly, the second lens assembly, and the third lens assembly each include a lens group including a plurality of lenses arranged in the first direction, a barrel portion surrounding the lens group, and a protrusion extending inwardly from the barrel portion perpendicular to the first direction and coming into contact with the lens group.

2. In paragraph 1, The above barrel portion includes a long axis and a short axis perpendicular to the first direction, A camera actuator in which a first length from the outer surface of the barrel portion to the inner surface of the protrusion in a second direction parallel to the long axis of the barrel portion is greater than a second length from the outer surface of the barrel portion to the inner surface of the protrusion in a third direction parallel to the short axis of the barrel portion.

3. In paragraph 2, The protrusion of any one of the first lens assembly, the second lens assembly and the third lens assembly is disposed between the plurality of lenses in the first direction, A camera actuator comprising a first surface contacting one of the plurality of lenses in the first direction and a second surface contacting another one of the plurality of lenses in the first direction.

4. In paragraph 3, A camera actuator in which the inner diameter of the protrusion decreases in the first direction from one of the plurality of lenses toward another of the plurality of lenses.

5. In paragraph 4, The above protrusion is, A first region having different inner diameters in the second direction and in the third direction; and A camera actuator comprising a second region having an inner diameter in the second direction and an inner diameter in the third direction that are equal to each other.

6. In paragraph 5, A camera actuator in which a portion of the inner surface of the first region of the protrusion in the third direction is flush with a portion of the inner surface of the barrel portion.

7. In paragraph 1, The protrusion extends inward from the end region of the barrel portion in the first direction and comes into contact with the lens group in the first direction, A camera actuator wherein a maximum length in a direction perpendicular to the first direction of one of the plurality of lenses that contacts the protrusion in the first direction is smaller than a maximum length in a direction perpendicular to the first direction of another lens that is arranged relatively far from the protrusion in the first direction.

8. In paragraph 7, A camera actuator in which at least one of the first lens assembly, the second lens assembly and the third lens assembly has a different direction from one lens adjacent to the protrusion in the first direction to another lens disposed relatively farthest from the protrusion.

9. In paragraph 8, The above barrel portion includes a long axis and a short axis perpendicular to the first direction, A camera actuator in which the inner diameter of the protrusion in the second direction parallel to the long axis and the inner diameter of the protrusion in the third direction parallel to the short axis are reduced in the direction toward the lens group in the first direction in contact with the protrusion.

10. In paragraph 7, The first lens assembly includes a first lens group, a first barrel portion, and a first protrusion, The second lens assembly includes a second lens group, a second barrel portion, and a second protrusion, The third lens assembly includes a third lens group, a third barrel portion, and a third protrusion, The first protrusion is formed in the end area of ​​the first barrel portion adjacent to the second lens assembly in the first direction, A camera actuator in which the second protrusion and the third protrusion are arranged to face each other in the first direction.

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