Camera Actuator

Abstract

The camera actuator of the present invention includes a housing, a first lens assembly and a second lens assembly that are disposed inside the housing and move in a first direction parallel to an optical axis direction, a first drive unit that is disposed on a first side of the housing and drives the first lens assembly, and a second drive unit that is disposed on a second side of the housing and drives the second lens assembly, wherein the first drive unit includes a first magnet disposed on the first lens assembly and a first coil facing the first magnet, and the second drive unit includes a second magnet disposed on the second lens assembly and a second coil facing the second magnet, and the length of the first coil in the first direction is greater than the length of the first magnet in the first direction and less than the length of the second coil in the first direction.

Description

[Technical Field]

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

[0002] A camera is a device that takes photographs or videos of a subject and is attached to handheld devices, drones, vehicles, etc.

[0003] To improve image quality, a camera device or camera module may have an image stabilization (IS) function that corrects or prevents shaking caused by user movement, an autofocus (AF) function that automatically adjusts the distance between the image sensor and the lens to align the focal length of the lens, and a zooming function that increases or decreases the magnification of a distant subject through a zoom lens.

[0004] As the camera performs various functions, each lens assembly housed inside the camera actuator moves along the optical axis due to the interaction between the coil and the magnet, and the distance each lens assembly can move may vary depending on the function it performs.

[0005] In addition, the multiple lens groups arranged sequentially along the optical axis direction include movable lens groups and fixed lens groups, and if the movable lens groups collide with the fixed lens groups while moving along the optical axis to perform functions such as zooming or autofocusing, the fixed lens groups and the movable lens groups may be damaged.

[0006] Therefore, there is a need for a technology that prevents damage to the lens groups due to collision between the fixed lens group and the moving lens group, and realizes a compact camera actuator that utilizes the difference in moving distance. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been devised to solve the above-mentioned problems of the prior art, and its objectives are to prevent wasted space, prevent overheating, and prevent damage due to collisions between lens groups.

[0008] The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] To achieve the above-mentioned object, a camera actuator according to an embodiment of the present invention includes a housing, a first lens assembly and a second lens assembly arranged inside the housing and moving in a first direction parallel to an optical axis direction, a first drive unit arranged on a first side of the housing and driving the first lens assembly, and a second drive unit arranged on a second side of the housing and driving the second lens assembly, wherein the first drive unit includes a first magnet arranged on the first lens assembly and a first coil facing the first magnet, and the second drive unit includes a second magnet arranged on the second lens assembly and a second coil facing the second magnet, and the length of the first coil in the first direction is greater than the length of the first magnet in the first direction and less than the length of the second coil in the first direction.

[0010] In this case, the control unit may include a control unit disposed spaced apart from the first coil in the first direction, and the control unit may overlap the first coil in the first direction and overlap the second coil in a second direction from the first side to the second side.

[0011] The second magnet may be longer than the first magnet in the first direction, and the first coil and the second coil may be arranged with their centers offset from each other.

[0012] The first coil and the second coil may be arranged to be longer than the second magnet in the first direction.

[0013] Meanwhile, the first lens assembly may include a first lens group and a first extension portion surrounding the first lens group and extending toward the first driving unit, and the second lens assembly may include a second lens group and a second extension portion surrounding the second lens group and extending toward the second driving unit.

[0014] In addition, the first extension portion may include a first recessed space recessed toward the second side, and the first magnet may be disposed in the first recessed space, and the second extension portion may include a second recessed space recessed toward the first side, and the second magnet may be disposed in the second recessed space.

[0015] In this case, the first driving unit may further include a first rail disposed between the first extension and the first coil, and a first ball unit disposed between the first rail and the first extension, and the second driving unit may further include a second rail disposed between the second extension and the second coil, and a second ball unit disposed between the second rail and the second extension, and the number of the second ball units may be greater than the number of the first ball units.

[0016] Meanwhile, the second lens assembly is disposed longer than the first lens assembly in the first direction and has a longer driving distance than the first lens assembly in the first direction.

[0017] The first coil may include a first coil unit and a second coil unit spaced apart in the first direction, and the second coil may include a third coil unit and a fourth coil unit spaced apart in the first direction.

[0018] In addition, a first center point of the separation area between the first coil unit and the second coil unit and a second center point of the separation area between the third coil unit and the fourth coil unit may be arranged to be shifted in the first direction.

[0019] Here, the first coil unit and the second coil unit may be formed shorter than the third coil unit and the fourth coil unit, respectively, in the first direction.

[0020] Meanwhile, the housing may include a first substrate, a second substrate, and a third substrate, the first coil and the control unit may be arranged on the first substrate, the second coil may be arranged on the second substrate, and the first substrate and the second substrate may be connected by the third substrate.

[0021] The housing may also include a first stopper facing the first lens assembly in the first direction and a second stopper facing the second lens assembly in the second direction, and the first stopper may be positioned higher in the first direction than the second stopper.

[0022] Meanwhile, a camera actuator according to an embodiment of the present invention includes a housing, a first lens assembly and a second lens assembly disposed within the housing and moving in a first direction along an optical axis, a first substrate disposed on a first side of the housing, a second substrate disposed on a second side of the housing and facing the first substrate in a second direction perpendicular to the first direction, a first coil disposed on the first substrate and driving the first lens assembly, a second coil disposed on the second substrate and driving the second lens assembly, and a control unit disposed on the first substrate and spaced apart from the first coil in the first direction, and the control unit overlaps the second coil and the second substrate in the second direction.

[0023] Here, the device may include a third substrate electrically connecting the first substrate and the second substrate, and the first coil may be electrically connected to the control unit through the first substrate, and the second coil may be electrically connected to the control unit through the second substrate and the third substrate.

[0024] Furthermore, the length of the first substrate in the first direction may be greater than the sum of the length of the first coil in the first direction and the length of the control unit in the first direction.

[0025] The second coil may include a hollow space therein, and the hollow space may overlap with the control portion in the second direction.

[0026] Meanwhile, the first coil may include a first coil unit and a second coil unit spaced apart from each other in the first direction, and the first magnet may overlap at least one of the first coil unit and the second coil unit in the second direction.

[0027] Here, the first magnet may not overlap the control portion in the second direction.

[0028] Meanwhile, a camera actuator according to an embodiment of the present invention may include a housing, a first lens assembly arranged on the housing, a second lens assembly and a third lens assembly arranged sequentially within the housing, a cover base arranged between the first lens assembly and the second lens assembly and accommodating the first lens assembly, a first driving unit that drives the second lens assembly in an optical axis direction, and a second driving unit that drives the third lens assembly in the optical axis direction.

[0029] Here, the cover base may be disposed between the first lens assembly and the housing, and a first surface thereof facing the second lens assembly may be spaced apart from the housing.

[0030] Furthermore, the first surface may include a protrusion, a portion of which protrudes toward the second lens assembly, and an extension extending from the protrusion in a second direction perpendicular to a first direction parallel to the optical axis direction, and the bottom surfaces of the protrusion and the extension facing the second lens assembly may be arranged so as to be inclined relative to each other.

[0031] The cover base may further include a second surface extending from the extension portion in a direction away from the second lens assembly and away from the housing, and may include an inclined portion extending at an incline from the extension portion, and a side portion extending parallel to the first direction from one end of the inclined portion.

[0032] Meanwhile, the cover base may include a recess into which the first lens assembly is inserted and a first wing extending in a first direction parallel to the optical axis direction and a second direction perpendicular to the first direction.

[0033] Here, the first lens assembly may include a second wing portion extending in the second direction, and the length of the second wing portion in the second direction may be shorter than the length of the first wing portion in the second direction.

[0034] The recess may have an inner surface in contact with the first lens assembly, and a lower portion thereof may be spaced apart from the first lens assembly in the optical axis direction.

[0035] Meanwhile, the cover base may include a third stopper facing the second lens assembly in a first direction parallel to the optical axis direction, and a fourth stopper facing the third lens assembly in the first direction.

[0036] The third stopper may be disposed such that a lowermost end in the first direction is more adjacent to the first lens assembly than a lowermost end in the first direction of the fourth stopper. [Effects of the Invention]

[0037] A camera actuator according to an embodiment of the present invention for solving the above problem can form a difference in length between the first coil and the second coil according to a difference in driving distance between the moved lens assemblies.

[0038] In this case, since the control unit is provided in the space formed by the difference in length, heat generated by the control unit can be efficiently released, and the camera actuator can be made smaller.

[0039] In addition, there is an effect of preventing damage to the first lens group or the second lens group due to a collision between the fixed first lens assembly and the fixed second lens group of the second lens assembly.

[0040] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0041] Furthermore, the effects of the present invention can be explained in more detail in the detailed description of the present invention, and are not necessarily limited to those presented above. [Brief explanation of the drawings]

[0042] The foregoing summary, as well as the following detailed description of preferred embodiments of the present application, will be better understood when read in conjunction with the appended drawings.

[0043] For the purpose of illustrating the invention, there are shown in the drawings preferred embodiments.

[0044] It should be understood, however, that the present application is not limited to the precise arrangements and instrumentalities shown.

[0045] [Figure 1] 1 is a diagram illustrating an overall explanation of a camera actuator according to an embodiment of the present invention;

[0046] [Figure 2] 1 is a diagram illustrating the configuration of a camera actuator according to an embodiment of the present invention;

[0047] [Figure 3] 1 is a diagram illustrating an overall configuration of a camera actuator according to an embodiment of the present invention;

[0048] [Figure 4]10 is a diagram illustrating a difference in length between components of a camera actuator according to an embodiment of the present invention;

[0049] [Figure 5] 2 is a view illustrating a second lens assembly of a camera actuator according to an embodiment of the present invention;

[0050] [Figure 6] 1 is a view illustrating a third lens assembly of a camera actuator according to an embodiment of the present invention;

[0051] [Figure 7] 1 is a view illustrating a first rail and a first ball of a camera actuator according to an embodiment of the present invention;

[0052] [Figure 8] 3 is a diagram illustrating a first rail of a camera actuator in more detail according to an embodiment of the present invention;

[0053] [Figure 9] 1 is a view illustrating a second rail and a second ball of a camera actuator according to an embodiment of the present invention;

[0054] [Figure 10] 1 is a diagram illustrating a second rail of a camera actuator in more detail according to an embodiment of the present invention;

[0055] [Figure 11] 2 is a diagram illustrating a first substrate, a second substrate, and a third substrate of a camera actuator according to an embodiment of the present invention.

[0056] [Figure 12] 3 is a view illustrating a first Hall sensor of a camera actuator according to an embodiment of the present invention;

[0057] [Figure 13] 10 is a view illustrating a second Hall sensor of a camera actuator according to an embodiment of the present invention;

[0058] [Figure 14] 10 is a diagram illustrating a difference between the centers of a first magnet and a second magnet and the centers of a first coil and a second coil of a camera actuator according to an embodiment of the present invention.

[0059] [Figure 15] 2 is a view illustrating a cover base of a camera actuator according to an embodiment of the present invention;

[0060] [Figure 16] 2 is a view illustrating a first surface of a camera actuator according to an embodiment of the present invention;

[0061] [Figure 17] 4 is a view illustrating a separation space between a protrusion of a camera actuator and a housing according to an embodiment of the present invention;

[0062] [Figure 18] 4 is a view illustrating a separation form of a protrusion and a separation form of an extension of a camera actuator according to an embodiment of the present invention;

[0063] [Figure 19] 3 is a view illustrating a first stopper and a second stopper of a camera actuator according to an embodiment of the present invention;

[0064] [Figure 20] 10 is a view illustrating a third surface of a camera actuator according to an embodiment of the present invention;

[0065] [Figure 21]2 is a view illustrating a step portion of a camera actuator according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0066] Since the present invention can be modified in various ways and has various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to the specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and alternatives that fall within the spirit and technical scope of the present invention. In describing the present invention, if it is determined that detailed descriptions of related publicly known technologies may obscure the gist of the present invention, such detailed descriptions will be omitted.

[0067] Terms such as "first," "second," etc. may be used to describe various components, but the components should not be limited by these terms. These terms are used only to distinguish one component from another.

[0068] The terms used in this application are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprise" or "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0069] Furthermore, throughout the specification, when the term "connected" is used, it 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 two or more components are not only physically connected but also electrically connected, or that two or more components are designated by different names depending on their position or function but are actually one.

[0070] Furthermore, when something is described as being formed or disposed "above or below" a component, "above" or "below" includes not only the case where two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components. Furthermore, when something is expressed as "above" or "below," it can mean not only the upper direction but also the lower direction based on one component.

[0071] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0072] Reference can first be made to FIGS. 1-11 for a general description of the present invention.

[0073] 1 is a diagram illustrating an overall explanation of a camera actuator according to an embodiment of the present invention, FIG. 2 is a diagram illustrating the arrangement of components of a camera actuator according to an embodiment of the present invention, FIG. 3 is a diagram illustrating the general configuration of a camera actuator according to an embodiment of the present invention, FIG. 4 is a diagram illustrating a difference in length between components of a camera actuator according to an embodiment of the present invention, FIG. 5 is a diagram illustrating a second lens assembly of a camera actuator according to an embodiment of the present invention, FIG. 6 is a diagram illustrating a third lens assembly of a camera actuator according to an embodiment of the present invention, FIG. 7 is a diagram illustrating a first rail and a first ball of a camera actuator according to an embodiment of the present invention, FIG. 8 is a diagram illustrating a first rail of a camera actuator according to an embodiment of the present invention in more detail, FIG. 9 is a diagram illustrating a second rail and a second ball of a camera actuator according to an embodiment of the present invention, FIG. 10 is a diagram illustrating a second rail of a camera actuator according to an embodiment of the present invention in more detail, and FIG. 11 is a diagram illustrating a first substrate, a second substrate, and a third substrate of a camera actuator according to an embodiment of the present invention.

[0074] First, as shown in FIG. 1, a camera actuator according to one embodiment of the present invention includes a housing 100, a second lens assembly 300 and a third lens assembly 400 disposed inside the housing 100 and movable in a first direction along the optical axis, and a first lens assembly 200 disposed at the top of the housing 100 in the optical axis direction, i.e., adjacent to the object in the direction from the object toward the second lens assembly 300.

[0075] Here, the housing 100 can form the appearance of a camera actuator, and a first lens assembly 200, a second lens assembly 300, and a third lens assembly 400 can be sequentially arranged along a first direction.

[0076] 1, the first lens assembly 200 may be disposed on top of the housing 100, and the second lens assembly 300 and the third lens assembly 400 may be disposed inside the housing 100.

[0077] To explain this in more detail, referring to FIG. 2, as shown in FIG. 2, a first lens assembly 200, a second lens assembly 300, and a third lens assembly 400 may be sequentially arranged in the first direction.

[0078] A cover base 500 may be disposed between the first lens assembly 200 and the second lens assembly 300 .

[0079] Here, the first lens assembly 200 may be attached to the cover base 500, and a separate adhesive member may be disposed, and the adhesive member may be epoxy.

[0080] Here, the use of epoxy as an example of an adhesive material is merely for the purpose of aiding understanding, and the present invention is not necessarily limited to the aforementioned examples. The cover base 500 will be described in more detail with reference to the drawings described below.

[0081] Meanwhile, the first driver 320 and the second driver 420 may be arranged in a direction perpendicular to a first direction parallel to the optical axis direction.

[0082] Here, the first driver 320 and the second driver 420 are arranged in the second direction, sandwiching the second lens assembly 300 and the third lens assembly 400, and the first driver 320 and the second driver 420 will be described in more detail with reference to the drawings described below.

[0083] Meanwhile, as shown in FIG. 3, the second lens assembly 300 may include a second lens group 310 and a first body portion 350 surrounding the second lens group 310 and extending toward a first side, and the third lens assembly 400 may include a third lens group 410 and a second body portion 450 surrounding the third lens group 410 and extending toward a second side.

[0084] Here, the first side and the second side may refer to one side and the other side of the housing 100, with the first direction being parallel to the optical axis direction and the second direction being perpendicular to the first direction, the second direction may refer to the direction toward both sides of the housing 100, the first direction may refer to the height direction of the housing 100, and the third direction perpendicular to the second direction and the first direction may refer to the direction toward the front and rear of the housing 100.

[0085] That is, the first direction may be parallel to the optical axis direction or may refer to the optical axis direction, the second direction may include both directions from the first side to the second side and from the second side to the first side based on the housing 100, and the third direction may refer to both directions from the front to the rear and from the rear to the front based on the housing 100.

[0086] This can be more clearly understood through the first direction, second direction and third direction, and first side and second side shown in the drawings.

[0087] At this time, the first body part 350 and the second body part 450 will be described in more detail with reference to the drawings described later.

[0088] Meanwhile, the camera actuator according to an embodiment of the present invention further includes, in addition to the first lens assembly 200, the housing 100, the second lens assembly 300, and the third lens assembly 400, a first driver 320 arranged on a first side of the housing 100 and driving the second lens assembly 300, a second driver 420 arranged on a second side of the housing 100 and driving the third lens assembly 400, and a controller 600 that controls the first driver 320 and the second driver 420.

[0089] Here, the first driving unit 320 is disposed on the first side and may include a first magnet M1 and first coils 321 and 322 to drive the second lens assembly 300 on the first side through electromagnetic interaction.

[0090] That is, when electricity flows through the first coils 321 and 322, electromagnetic interaction occurs with the first magnet M1, and as a result, the second lens assembly 300 may move in the first direction.

[0091] The second driving unit 420 is disposed on the second side and may include a second magnet M2 and second coils 421 and 422 to drive the third lens assembly 400 on the second side through electromagnetic interaction.

[0092] That is, when electricity flows through the second coils 421 and 422, electromagnetic interaction occurs with the second magnet M2, and as a result, the third lens assembly 400 may move along the first direction.

[0093] Here, the first magnet M1 may be disposed between the first coils 321 and 322 and the first body 350, and the second magnet M2 may be disposed between the second coils 421 and 422 and the second body 450.

[0094] In this case, as shown in Figures 3 and 4, the length L3 of the first coils 321 and 322 in the first direction may be longer than the length L1 of the first magnet M1 in the first direction, and may be arranged to be shorter than the length L4 of the second coils 421 and 422 in the first direction.

[0095] That is, based on the first direction, the length L3 of the first coils 321, 322 may be shorter than the length L4 of the second coils 421, 422, the length L1 of the first magnet M1 may be shorter than the length L2 of the second magnet M2, the length L3 of the first coils 321, 322 may be longer than the length L1 of the first magnet M1, and the length L4 of the second coils 421, 422 may be longer than the length L2 of the second magnet M2.

[0096] At this time, the first coils 321 and 322 are formed shorter in the first direction than the second coils 421 and 422 because the driving distance of the second lens assembly 300 is relatively shorter than the driving distance of the third lens assembly 400 .

[0097] Here, the first coils 321 and 322 arranged on the first side are divided into a first coil unit 321 and a second coil unit 322, and the first coil unit 321 and the second coil unit 322 may be arranged to be spaced apart from each other in the first direction.

[0098] In addition, the second coils 421 and 422 arranged on the second side may be divided into a third coil unit 421 and a fourth coil unit 422, and the third coil unit 421 and the fourth coil unit 422 may be arranged to be spaced apart from each other in the first direction.

[0099] Here, the length L5 of the first coil unit 321 in the first direction can be arranged to be shorter than the length L7 of the third coil unit 421 in the first direction and the length L8 of the third coil unit 422 in the first direction.

[0100] Similarly, the length L6 of the second coil unit 322 in the first direction can be arranged to be shorter than the length L7 of the third coil unit 421 in the first direction and the length L8 of the third coil unit 422 in the first direction.

[0101] In this case, the first coil unit 321 may be formed to have a first hollow 321a defined by an inner diameter, the second coil unit 322 may be formed to have a second hollow 322a defined by an inner diameter, the third coil unit 421 may be formed to have a third hollow 421a defined by an inner diameter, and the fourth coil may be formed to have a fourth hollow 422a defined by an inner diameter.

[0102] Here, similar to the relationship between the first coils 321, 322 and the second coils 421, 422 described above, the length L9 of the first hollow 321a may be formed relatively shorter in the first direction than the length L11 of the third hollow 421a and the length L12 of the fourth hollow 422a.

[0103] Furthermore, the length L10 of the second hollow 322a in the first direction may be relatively shorter than the length L11 of the third hollow 421a and the length L12 of the fourth hollow 422a in the first direction.

[0104] Here, similar to the relationship between the first coils 321, 322 and the second coils 421, 422 described above in detail, the first hollow 321a may be formed to be relatively shorter in the first direction than the third hollow 421a and the fourth hollow 422a.

[0105] In addition, the second hollow 322a may be formed to be relatively shorter in the first direction than the third hollow 421a and the fourth hollow 422a.

[0106] In this case, the uppermost end of the first hollow 321a may be positioned on the same line as the uppermost end of the third hollow 421a in the first direction, but the lowermost end of the first hollow 321a may be positioned relatively higher in the first direction than the lowermost end of the third hollow 421a.

[0107] Meanwhile, the controller 600 may be arranged to overlap the first coils 321 and 322 in a first direction, and may be arranged to overlap the second coils 421 and 422 in a second direction from the first side to the second side.

[0108] More specifically, the control unit 600 may overlap the first coil unit 321 and the second coil unit 322 in the first direction, and may overlap the fourth hollow 422a in the second direction.

[0109] In other words, the control unit 600 may overlap with the first coil unit 321 and the second coil unit 322 in the first direction but may not overlap with the first coil unit 321 and the second coil unit 322 in the second direction, and the control unit 600 may not be positioned in the first hollow 321a, the second hollow 322a, the third hollow 421a, or the fourth hollow 422a, but may be positioned outside the first coil unit 321 and the second coil unit 322.

[0110] That is, the control unit 600 is disposed inside the housing 100 so as to be separated from the first coils 321 and 322, and the space in which the control unit 600 is located may include an opening H that opens in a direction from the first side toward the second side in the second direction.

[0111] Furthermore, a plurality of openings H may be formed in a third direction perpendicular to the first and second directions.

[0112] Here, the sum of the length L3 of the first coils 321 and 322 in the first direction and the length L13 of the control unit 600 in the first direction may be smaller than the length L4 of the second coils 421 and 422 in the first direction.

[0113] More specifically, the control unit 600 may be disposed to be separated from the first coil unit 321 and the second coil unit 322 in the first direction, and may be disposed at a relatively large distance from the first lens assembly 200 .

[0114] This differs from the conventional arrangement in which the control unit 600 is arranged above the first hollow 321a or the second hollow 322a, in that the control unit 600 is arranged to be separated from the first coil unit 321 and the second coil unit 322, thereby minimizing the influence of the electromagnetic field generated in the first coil unit 321 and the second coil unit 322 and the magnetic field generated by the first magnet M1.

[0115] Accordingly, the amount of heat generated in the control unit 600 can be effectively reduced.

[0116] In addition, a first stopper 580 may be further arranged inside the housing 100 facing the second lens assembly 300 in the first direction to prevent the second lens assembly 300 from colliding with the housing 100, the first lens assembly 200, or the third lens assembly 400 as it moves.

[0117] In addition, the housing 100 may further include a second stopper 590 facing the third lens assembly 400 in the first direction to prevent the third lens assembly 400 from colliding with the housing 100 and the second lens assembly 300 as the third lens assembly 400 is moved.

[0118] In this case, the first stopper 580 may be disposed above the opening H, facing the first body portion 350 while facing the second lens assembly 300 in the first direction.

[0119] That is, since the first stopper 580 is located above the opening H in the first direction, the top surface of the first stopper 580 in the first direction and the top surface of the second stopper 590 in the first direction may have different linear heights.

[0120] Meanwhile, referring to FIG. 5 for a more detailed description of the second lens assembly 300, as shown in FIG. 5, the second lens assembly 300 includes the second lens group 310 and the first body portion 350 as described above, and the second lens assembly 300 can be driven by the first driving portion 320.

[0121] Here, the second lens assembly 300 may include the second lens group 310 and the first body portion 350 as described above, and the first magnet M1 of the second lens assembly 300 may be disposed between the first body portion 350 and the first coils 321, 322.

[0122] Here, the first body part 350 may include a first grip part formed in a shape surrounding the second lens group 310 .

[0123] In this case, the first gripping portion and the first body portion 350 may refer to the barrel of the second lens assembly 300 .

[0124] In addition, the first body part 350 may extend from the second lens group 310, i.e., the first grip part, toward the first coils 321 and 322 while widening, and may extend toward the first coils 321 and 322 while being inclined relatively toward the lower side of the second lens group 310.

[0125] In addition, the first body portion 350 may have a first recessed space 351 recessed from the first side to the second side so that the first magnet M1 can be disposed therein.

[0126] Here, a first step 352 may be formed on the upper part of the first body part 350 and the upper part of the first magnet M1 to prevent the second lens group 310 from colliding with the first lens assembly 200 while moving in the first direction.

[0127] At this time, the first step 352 protrudes relatively higher than the second lens group 310 in the first direction, thereby preventing damage to the second lens group 310 due to a collision between the first lens assembly 200 and the second lens group 310.

[0128] In addition, a first Hall sensor 340 is disposed in the first hollow 321a of the first coil unit 321, and as the second lens assembly 300 moves in the first direction, the second lens assembly 300 and the first Hall sensor 340 may overlap in the second direction.

[0129] Meanwhile, as shown in FIG. 6, the third lens assembly 400 may include a third lens group 410 and a second body part 450 surrounding the third lens group 410 and extending toward the second driving part 420 .

[0130] In addition, the second body portion 450 may include a second gripping portion surrounding the third lens group 410, similar to the first body portion 350, and the second body portion 450 may extend from the second gripping portion toward the second driving portion 420, but may extend so that the upper side is relatively long and inclined in the first direction.

[0131] Here, the second gripping portion and the second body portion 450 may refer to the barrel of the third lens assembly 400 in the same manner as the first gripping portion and the first body portion 350 described above.

[0132] In addition, the second body portion 450 has a second recessed space 451 recessed toward the first side, and the second magnet M2 can be positioned above the second recessed space 451.

[0133] As a result, the second magnet M2 can be positioned between the second coils 421 and 422 and the second body 450 in the second direction.

[0134] Here, a second step 452 may be formed on the upper part of the second body part 450 and the upper part of the second magnet M2 to prevent the third lens group 410 from colliding with the second lens assembly 300 while moving in the first direction.

[0135] At this time, the bottom surface of the second body portion 450 facing the second step 452 abuts against the second stopper 590 to prevent collision with the bottom surface of the housing 100, and the second step 452 abuts against the fourth stopper 570 facing the second stopper 590 in the first direction to prevent collision with the second lens assembly 300.

[0136] The fourth stopper 570 will be described in more detail with reference to the drawings below.

[0137] In addition, a second Hall sensor 440 may be disposed in the fourth hollow 422a of the fourth coil unit 422, and the third lens assembly 400 may overlap with the second Hall sensor 440 in the second direction by moving in the first direction.

[0138] Meanwhile, the first drive unit 320 may include first rails 331 and 332, which may be described with reference to FIG.

[0139] First, as shown in FIG. 7, the first driving unit 320 may include first rails 331 and 332, and may include first balls 341 and 342 disposed between the first body unit 350 and the first rails 331 and 332.

[0140] More specifically, the first rails 331 and 332 may include a first rail unit 331 and a second rail unit 332, and the first rail unit 331 and the second rail unit 332 may be spaced apart from each other in the third direction.

[0141] In addition, the first balls 341, 342 may include a first ball unit 341 and a second ball unit 342, and the first rail unit 331 and the first ball unit 341 may overlap in the second direction, and the second rail unit 332 and the second ball unit 342 may overlap.

[0142] Here, the first magnet M1 may be disposed between the first ball unit 341 and the second ball unit 342 in the third direction, and the first ball unit 341 and the second ball unit 342 may minimize friction during the movement of the second lens assembly 300.

[0143] In addition, the first ball unit 341 and the second ball unit 342 may space the first coils 321 and 322 and the first magnet M1 by a predetermined distance to prevent friction and contact that may occur when the first coils 321 and 322 and the first magnet M1 come into contact with each other.

[0144] In this case, the first ball unit 341 may include a first ball member 341a and a second ball member 341b spaced apart from each other in the first direction, and the first ball members 341a may be arranged in multiple numbers in the first direction, and the second ball members 341b may be arranged in multiple numbers in the first direction.

[0145] In addition, the second ball unit 342 may also include a third ball member 342a and a fourth ball member 342b spaced apart from each other in the first direction, similar to the first ball unit 341, and multiple third ball members 342a and fourth ball members 342b may be arranged in the first direction.

[0146] To explain this in more detail, as shown in FIG. 8, when viewed from above, the first magnet M1 may be disposed between the first coils 321, 322 and the first body part 350, and between the first ball unit 341 and the second ball unit 342.

[0147] Also, the first rail unit 331 may be in point contact with the first ball unit 341 at one point, and the second ball unit 342 may be in at least two point contacts or surface contact with the second rail unit 332.

[0148] Meanwhile, as shown in FIG. 9, the second driving unit 420 may include second rails 431, 432 and second balls 441, 442, similar to the first driving unit 320, and the second rails 431, 432 may include a third rail unit 431 and a fourth rail unit 432.

[0149] In addition, the third rail unit 431 and the fourth rail unit 432 may be spaced apart from each other in the third direction, and a second magnet M2 may be disposed between the third rail unit 431 and the fourth rail unit 432.

[0150] In addition, the second balls 441 and 442 may include a third ball unit 441 arranged to correspond to the third rail unit 431 and a fourth ball unit 442 arranged to correspond to the fourth rail unit 432.

[0151] In this case, the third ball unit 441 may include a plurality of fifth ball members 441a arranged relatively adjacent to the first lens assembly 200 in the first direction and a plurality of sixth ball members 441b spaced apart from the fifth ball members 441a.

[0152] That is, similar to the first magnet M1, the second magnet M2 can be arranged between the third rail unit 431 and the fourth rail unit 432 in the third direction, and the second magnet M2 can be arranged between the third ball unit 441 and the fourth ball unit 442.

[0153] In addition, the fourth ball unit 442 may include a plurality of seventh ball members 442a arranged adjacent to the first lens assembly 200 in the first direction and a plurality of eighth ball members 442b spaced apart from the seventh ball members 442a in the first direction.

[0154] Here, the first ball unit 341 may be a group of a plurality of first ball members 341a and second ball members 341b, and the second ball unit 342 may be a group of a plurality of third ball members 342a and fourth ball members 342b.

[0155] Also, the third ball unit 441 may be a group of a plurality of fifth ball members 441a and sixth ball members 441b, and the fourth ball unit 442 may be a group of a plurality of seventh ball members 442a and eighth ball members 442b.

[0156] This is a name given individually to facilitate understanding when describing the shapes that are separated from each other in the first direction, and in the process described below, the plurality of first ball units 341, the plurality of second ball units 342, the plurality of third ball units 441, and the plurality of fourth ball units 442 may be used to refer to the respective groups.

[0157] Furthermore, when referring to the number of first ball units 341 or a plurality of first ball units 341, using the first ball unit 341 as an example, it will be understood to mean the total number of first ball members 341a and second ball members 341b.

[0158] Meanwhile, the third ball unit 441 and the fourth ball unit 442 may be disposed to be relatively longer than the first ball unit 341 and the second ball unit 342, respectively, in the first direction.

[0159] Specifically, the number of each of the first ball units 341 and the second ball units 342 may be arranged to be relatively smaller than the number of each of the third ball units 441 and the fourth ball units 442.

[0160] In addition, since the first ball unit 341 and the second ball unit 342 are arranged between the first body portion 350 and the first rails 331, 332, and the third ball unit 441 and the fourth ball unit 442 are arranged between the second body portion 450 and the second rails 431, 432, the second body portion 450 may be relatively longer in the first direction than the first body portion 350.

[0161] Also, as shown in FIG. 10, the third ball unit 441 may be in point contact with the third rail unit 431, and the fourth ball unit 442 may be in at least two point contacts or surface contact with the fourth rail unit 432.

[0162] Meanwhile, an embodiment of the present invention may include a first substrate 710, a second substrate 720, and a third substrate 730 as shown in FIG.

[0163] Here, the first driving unit 320 for driving the second lens assembly 300, specifically, the first coils 321 and 322 and the control unit 600 may be disposed on the first substrate 710.

[0164] In addition, the second substrate 720 may include a second driving unit 420 for driving the third lens assembly 400, more specifically, second coils 421 and 422, and the first substrate 710 and the second substrate 720 may be connected by a third substrate 730.

[0165] Here, the first substrate 710 and the second substrate 720 may be inserted into the housing 100, and the housing 100 may have slits into which the first substrate 710 and the second substrate 720 are inserted.

[0166] At this time, the first substrate 710 and the second substrate 720 can be disposed inside the housing 100 through the slits.

[0167] In addition, the third substrate 730 can extend from the first substrate 710 to the second substrate 720 while surrounding the outside of the housing 100 in the second direction, connecting the first substrate 710 and the second substrate 720, and signals from the control unit 600 can be transmitted to the second coils 421 and 422 through the third substrate 730.

[0168] Meanwhile, in order to explain the layout relationship of the camera actuator according to the embodiment of the present invention through the above detailed description, reference can be made to FIGS.

[0169] Specifically, Figure 12 is a diagram illustrating a first Hall sensor of a camera actuator according to one embodiment of the present invention, Figure 13 is a diagram illustrating a second Hall sensor of a camera actuator according to one embodiment of the present invention, and Figure 14 is a diagram illustrating the difference between the centers of the first and second magnets and the centers of the first and second coils of a camera actuator according to one embodiment of the present invention.

[0170] First, as shown in FIG. 12, the first coils 321 and 322 include a first coil unit 321 and a second coil unit 322, and the control unit 600 may be disposed on the first substrate 710 so as to be separated from the first coils 321 and 322.

[0171] At this time, a first hollow 321a defined by an inner diameter may be formed in the first coil unit 321, a second hollow 322a defined by an inner diameter may be formed in the second coil unit 322, and the first Hall sensor 340 may be disposed in the first hollow 321a.

[0172] This may be because the second lens assembly 300 moves between the first lens assembly 200 and the third lens assembly 400, as detailed above.

[0173] In addition, since the first coils 321 and 322 are positioned in a position where the control unit 600 overlaps the lower part of the first coils 321 and 322 in the first direction, more specifically the fourth hollow 422a, in the second direction, the uppermost surfaces of the first coils 321 and 322 in the first direction can be aligned in the same line as the uppermost surfaces of the second coils 421 and 422 in the first direction.

[0174] Meanwhile, as shown in FIG. 13, the second Hall sensor 440 may be disposed in the fourth hollow 422a of the fourth coil unit 422, which may be because the third lens assembly 400 is positioned relatively lower than the second lens assembly 300 in the first direction.

[0175] That is, the first Hall sensor 340 and the second Hall sensor 440 may be arranged so as not to overlap each other in the second direction, as shown in FIG.

[0176] Meanwhile, when the center point of the separation area between the first coil unit 321 and the second coil unit 322 is defined as the first center point P1, and the center point of the separation area between the third coil unit 421 and the fourth coil unit 422 is defined as the second center point P2, the first center point P1 and the second center point P2 may be positioned offset from each other in the first direction, as shown in FIG. 13.

[0177] This may be because the length L3 of the first coils 321, 322 in the first direction is relatively shorter than the length L4 of the second coils 421, 422 in the first direction, and the top surfaces of the first coils 321, 322 and the second coils 421, 422 in the first direction are arranged on the same line in the second direction.

[0178] In addition, the first magnet M1 and the second magnet M2 have different lengths because the second lens assembly 300 and the third lens assembly 400 have different driving distances, and therefore the center points of the first magnet M1 and the second magnet M2 may be offset from each other in the first direction.

[0179] Meanwhile, the housing 100 and the cover base 500 of the camera actuator according to the embodiment of the present invention will be described with reference to FIGS.

[0180] Specifically, Figure 15 is a view illustrating the cover base of a camera actuator according to one embodiment of the present invention, Figure 16 is a view illustrating the first side of a camera actuator according to one embodiment of the present invention, Figure 17 is a view illustrating the separation space between the protrusion and the housing of a camera actuator according to one embodiment of the present invention, Figure 18 is a view illustrating the separation shape of the protrusion and the separation shape of the extension of a camera actuator according to one embodiment of the present invention, and Figure 19 is a view illustrating the first stopper and second stopper of a camera actuator according to one embodiment of the present invention.

[0181] First, as described above in detail, the second lens assembly 300 and the third lens assembly 400 are located inside the housing 100 and are moved along the optical axis direction by the first driving unit 320 and the second driving unit 420, and the first lens assembly 200 can be fixed to the outside of the housing 100.

[0182] In addition, a cover base 500 may be positioned between the first lens assembly 200 and the second lens assembly 300 , more specifically, between the first lens assembly 200 and the housing 100 , and the first lens assembly 200 may be attached to the cover base 500 .

[0183] At this time, the cover base 500 may be attached to the housing 100 .

[0184] That is, the first lens assembly 200, the cover base 500, the second lens assembly 300, and the third lens assembly 400 may be sequentially arranged along the optical axis direction, and the first lens assembly 200 and the cover base 500 may be arranged outside the housing 100.

[0185] Also, the second lens assembly 300 and the third lens assembly 400 may be located inside the housing 100 .

[0186] More specifically, as shown in FIG. 15, the first lens assembly 200, which is positioned outside the housing 100 at a position adjacent to the object side in the optical axis direction based on the housing 100, may include a first lens group 220 and a second wing portion 210 extending in a second direction from the first lens group 220.

[0187] Meanwhile, as shown in FIG. 15, a cover base 500 may be provided between the first lens assembly 200 and the housing 100, and the cover base 500 may prevent the second lens assembly 300, which is moved in the first direction, from colliding with the first lens assembly 200 and damaging the first lens group 220 or the second lens group 310.

[0188] More specifically, the cover base 500 may include a first wing portion 510 extending in the second direction and a recessed portion 520 in which the first lens assembly 200 is mounted.

[0189] Here, the first wing portion 510 may be formed longer than the second wing portion 210 in the second direction, and the first wing portion 510 and the second wing portion 210 may be spaced apart by a predetermined distance in the first direction.

[0190] At this time, the inner surface of the recess 520 is in contact with the first lens assembly 200, and an adhesive member is disposed between the recess 520 and the first lens assembly 200, so that the first lens assembly 200 can be fixed by the adhesive member.

[0191] Here, the adhesive member disposed between the first lens assembly 200 and the recess 520 may be, but is not limited to, epoxy.

[0192] Furthermore, if the bottom surface of the recess 520 is defined as a recessed bottom surface 521, the recessed bottom surface 521 and the bottom surface of the first lens assembly 200 may be spaced apart from each other by a predetermined distance in the first direction.

[0193] Meanwhile, the cover base 500 may include a first surface 530 facing the second lens assembly 300, and a second surface 540 sandwiching the first surface 530 in the second direction and extending away from the first surface 530 in the first direction.

[0194] More specifically, the first surface 530 may face the housing 100 but may be positioned in a direction toward the second lens assembly 300, and may be spaced a predetermined distance from the housing 100, thereby minimizing the impact applied to the cover base 500.

[0195] In this case, the first surface 530 may include a protrusion 531 protruding in a first direction from the first lens assembly 200 toward the second lens assembly 300, and extensions 532 extending in a second direction from both ends of the protrusion 531.

[0196] Here, the protrusion 531 may extend in a direction from the first lens assembly 200 toward the second lens assembly 300 so that its width becomes narrower based on the extension 532 .

[0197] Here, the second surface 540 may include an inclined portion 541 extending from the extension portion 532 in the first direction so as to be inclined in a direction away from the second lens assembly 300, and a side portion 542 extending from the inclined portion 541 in the optical axis direction so as to be away from the second assembly.

[0198] That is, the inclined portion 541 is formed between the side portion 542 and the extension portion 532, and extends at an angle from the extension portion 532 toward the extension portion 532, and the side portion 542 can extend from the inclined portion 541 toward the second wing portion 210 parallel to the first direction.

[0199] Meanwhile, a portion of the lower portion of the first wing portion 510 may be separated from the housing 100, which will be described in more detail with reference to the drawings below.

[0200] Also, as shown in FIG. 16, the first surface 530 and the second surface 540 may be spaced apart from each other by a predetermined distance from the housing 100, which, as described above in detail, can prevent impacts caused by movement of the second lens assembly 300 from being transmitted to the first lens assembly 200.

[0201] Meanwhile, to explain the form in which the protrusion 531 and the extension 532 of the first surface 530 are spaced apart from the housing 100, first, as shown in Figures 17 and 18, the bottom surface of the protrusion 531 facing the housing 100 but spaced apart from the housing 100 can be defined as the protrusion bottom surface 531a, and the bottom surface of the extension 532 facing the housing 100 but spaced apart from the housing 100 can be defined as the extension bottom surface 532a. The surface of the housing 100 facing the extension bottom surface 532a can be defined as the flat surface 111, and the surface of the housing 100 facing the protrusion bottom surface 531a can be defined as the inclined surface 112.

[0202] First, as shown in FIG. 17, the protrusion bottom surface 531a of the protrusion 531 and the inclined surface 112 of the housing 100 facing each other may be inclined in the first direction so that the protrusion bottom surface 531a and the inclined surface 112 correspond to each other.

[0203] In addition, the protruding bottom surface 531a and the inclined surface 112 are inclined in the first direction to correspond to each other, but the protruding bottom surface 531a may be disposed to face the inclined surface 112 so as to be positioned relatively outside the housing 100.

[0204] This prevents the problem of the protrusion 531 meeting the second lens assembly 300 moving in a direction toward the first lens assembly 200 when the protrusion bottom surface 531 a faces relatively toward the inside of the housing 100 .

[0205] Alternatively, if the housing 100 is deformed due to other factors such as heat, causing the inclined surface 112 to move away from the housing 100, the protruding bottom surface 531a and the inclined surface 112 may come into contact with each other to limit deformation.

[0206] Also, as shown in FIG. 17, the shapes of the protruding bottom surface 531a and the extended bottom surface 532a of the protrusion 531 and the extension 532 are different. To explain this in more detail, the extended bottom surface 532a and the flat surface 111 of the housing 100 facing the extended bottom surface 532a may be parallel to each other in the second direction, and the protruding bottom surface 531a and the inclined surface 112 of the housing 100 facing the protruding bottom surface 531a may be arranged parallel to each other while being inclined with respect to the first direction.

[0207] According to this configuration, the protrusion 531 and the extension 532 may be arranged to have a step with an inclination relative to each other, and the inclined surface 112 and the flat surface 111 may also be arranged to have a step with an inclination relative to each other.

[0208] Meanwhile, as shown in FIG. 19, the lower portion of the first wing portion 510 may include a third stopper 560 facing the second lens assembly 300 in the first direction and a fourth stopper 570 facing the third lens assembly 400 in the first direction.

[0209] At this time, a step portion 550 may be formed between the third stopper 560 and the first wing portion 510 and between the fourth stopper 570 and the first wing portion 510 .

[0210] Here, the second lens assembly 300 may come into contact with the third stopper 560 while rising, and the third lens assembly 400 may come into contact with the fourth stopper 570 while rising.

[0211] In addition, since the third stopper 560 and the fourth stopper 570 are configured to be disposed on the cover base 500, the amount of impact applied to the first lens assembly 200 can be buffered by the cover base 500 and transmitted to the first lens assembly 200.

[0212] In this way, the cover base 500 can more effectively ensure the safety of the first lens assembly 200 by reducing the amount of impact that would previously have been applied directly to the first lens assembly 200 due to the third stopper 560 and the fourth stopper 570 being formed on the second wing portion 210.

[0213] In addition, the length in the first direction of the third stopper 560 and the step portion 550 on the first side and the length in the first direction of the fourth stopper 570 and the step portion 550 on the second side may be formed to be different from each other, which may be due to the difference in driving distance between the second lens assembly 300 and the third lens assembly 400.

[0214] For a description of the cushioning of the cover base 500 of the embodiment of the present invention detailed above, reference may be made to FIGS.

[0215] Specifically, FIG. 20 is a view illustrating the third surface of a camera actuator according to one embodiment of the present invention, and FIG. 21 is a view illustrating the step portion of a camera actuator according to one embodiment of the present invention.

[0216] First, as shown in FIG. 20, the first surface 530 and the second surface 540 are arranged to be spaced apart from each other on the housing 100, but if the bottom surface of the first wing portion 510 is defined as the wing bottom surface 511, the wing bottom surface 511 may be only partially spaced apart from the housing 100.

[0217] This is because space is required to separate the first surface 530 and the second surface 540 from the housing 100, and for this reason, the wing bottom surface 511 may include a protrusion 120 that protrudes from the housing 100 toward the wing bottom surface 511 so that only a portion of the wing bottom surface 511 is in contact with the housing 100 and is only a portion of the wing bottom surface 511 is separated from the wing bottom surface 511.

[0218] Meanwhile, as shown in FIG. 21, the arrangement of the cover base 500 will be described in detail. As described above, the inner surface of the recess 520 is in contact with the first lens assembly 200, and the first surface 530 and the second surface 540 may be arranged in pairs in the third direction, sandwiching the first lens assembly 200.

[0219] Here, the step portion 550 can be disposed between the pair of second surfaces 540 in the third direction.

[0220] In addition, since the cover base 500 of the present invention aims to reduce the amount of impact from the second lens assembly 300 or the third lens assembly 400 being transmitted to the first lens assembly 200, buffer spaces may be arranged between the first wing portion 510 and the third stopper 560 and between the first wing portion 510 and the fourth stopper 570 in the optical axis direction.

[0221] At this time, the buffer space may be divided into a first buffer space 551 that does not overlap with the third stopper 560 or the fourth stopper 570 in the first direction, and a second buffer space 552 that overlaps with the third stopper 560 or the fourth stopper 570 in the first direction.

[0222] Here, when a direct impact is transmitted to the third stopper 560 or the fourth stopper 570, the second buffer space 552 is transmitted to the first lens assembly 200, thereby effectively reducing the impact and vibration. Since it is obvious that a hollow structure reduces impact and vibration, further detailed explanation will be omitted.

[0223] On the other hand, the first buffer space 551 is arranged in a pair on either side of the first buffer space 551 in the third direction, and when an impact is transmitted to the second buffer space 552, the impact and vibration that are not sufficiently offset by the second buffer space 552 can be additionally reduced.

[0224] Regarding the housing 100 and cover base 500 described above in detail, although the cover base 500 is provided between the housing 100 and the first lens assembly 200, the first surface 530 and the second surface 540 of the cover base 500 are arranged to be spaced apart from the housing 100 by a predetermined distance in the first direction, thereby limiting the impact generated on the housing 100.

[0225] In addition, since the third stopper 560 and the fourth stopper 570 are disposed on the cover base 500, it is possible to prevent an impact from being directly transmitted to the first lens assembly 200.

[0226] In addition, a step portion 550 is arranged between the third stopper 560 and the fourth stopper 570 and the first wing portion 510, and inside the step portion 550, a second buffer space 552 overlapping the third stopper 560 or the fourth stopper 570 in the first direction and a pair of first buffer spaces 551 sandwiching the second buffer space 552 in the third direction may be arranged.

[0227] Here, the second buffering space 552 can reduce the impact and vibration transmitted directly to the third stopper 560 or the fourth stopper 570, and the first buffering space 551 can additionally reduce the impact and vibration that are not sufficiently offset by the second buffering space 552, thereby minimizing the amount of impact transmitted to the first lens assembly 200.

[0228] Although preferred embodiments of the invention have been described in detail, 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 of the invention.

[0229] Therefore, the foregoing embodiments should be considered as illustrative and not restrictive, and accordingly, the present invention is not limited to the foregoing description, but may be modified within the scope of the appended claims and their equivalents.

Claims

1. housing; a first lens assembly and a second lens assembly disposed inside the housing and movable in a first direction parallel to an optical axis; a first drive portion disposed on a first side of the housing and configured to drive the first lens assembly; and a second drive portion disposed on a second side of the housing and configured to drive the second lens assembly; The first driving unit is a first magnet disposed on the first lens assembly and a first coil facing the first magnet; The second drive unit is a second magnet disposed on the second lens assembly and a second coil facing the second magnet; A camera actuator, wherein the length of the first coil in the first direction is greater than the length of the first magnet in the first direction and less than the length of the second coil in the first direction.

2. a control unit disposed apart from the first coil in the first direction; the control unit overlaps with the first coil in the first direction; The camera actuator of claim 1 , wherein the actuator overlaps the second coil in a second direction from the first side toward the second side.

3. the second magnet is longer than the first magnet in the first direction; The camera actuator of claim 1 , wherein the first coil and the second coil are offset from each other in center.

4. The camera actuator according to claim 3 , wherein the first coil and the second coil are arranged longer than the second magnet in the first direction.

5. the first lens assembly includes a first lens group and a first extension portion surrounding the first lens group and extending toward the first drive portion; The camera actuator of claim 1 , wherein the second lens assembly includes a second lens group and a second extension portion surrounding the second lens group and extending toward the second drive portion.

6. the first extension portion includes a first recessed space recessed toward the second side, and the first magnet is disposed in the first recessed space; The camera actuator of claim 5 , wherein the second extension portion includes a second recessed space recessed toward the first side, and the second magnet is disposed in the second recessed space.

7. The first driving unit is a first rail disposed between the first extension and the first coil; and a first ball unit disposed between the first rail and the first extension; The second drive unit is a second rail disposed between the second extension and the second coil; and a second ball unit disposed between the second rail and the second extension; The camera actuator of claim 6 , wherein the number of the second ball units is greater than the number of the first ball units.

8. The second lens assembly the first lens assembly is longer than the first lens assembly in the first direction; The camera actuator of claim 1 , having a longer drive distance in the first direction than the first lens assembly.

9. the first coil includes a first coil unit and a second coil unit spaced apart in the first direction, The camera actuator according to claim 1 , wherein the second coil includes a third coil unit and a fourth coil unit spaced apart in the first direction.

10. 10. The camera actuator of claim 9, wherein a first center point of the separation area between the first coil unit and the second coil unit and a second center point of the separation area between the third coil unit and the fourth coil unit are positioned offset in the first direction.

Images